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fs/ext4/extents.c
133 KB
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/* * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com * Written by Alex Tomas <alex@clusterfs.com> * * Architecture independence: * Copyright (c) 2005, Bull S.A. * Written by Pierre Peiffer <pierre.peiffer@bull.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public Licens * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- */ /* * Extents support for EXT4 * * TODO: * - ext4*_error() should be used in some situations * - analyze all BUG()/BUG_ON(), use -EIO where appropriate * - smart tree reduction */ |
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#include <linux/fs.h> #include <linux/time.h> |
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#include <linux/jbd2.h> |
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#include <linux/highuid.h> #include <linux/pagemap.h> #include <linux/quotaops.h> #include <linux/string.h> #include <linux/slab.h> |
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#include <linux/falloc.h> |
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#include <asm/uaccess.h> |
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#include <linux/fiemap.h> |
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#include "ext4_jbd2.h" |
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|
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#include <trace/events/ext4.h> |
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static int ext4_split_extent(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, struct ext4_map_blocks *map, int split_flag, int flags); |
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static int ext4_ext_truncate_extend_restart(handle_t *handle, struct inode *inode, int needed) |
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{ int err; |
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if (!ext4_handle_valid(handle)) return 0; |
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if (handle->h_buffer_credits > needed) |
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return 0; err = ext4_journal_extend(handle, needed); |
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if (err <= 0) |
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return err; |
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err = ext4_truncate_restart_trans(handle, inode, needed); |
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if (err == 0) err = -EAGAIN; |
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return err; |
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} /* * could return: * - EROFS * - ENOMEM */ static int ext4_ext_get_access(handle_t *handle, struct inode *inode, struct ext4_ext_path *path) { if (path->p_bh) { /* path points to block */ return ext4_journal_get_write_access(handle, path->p_bh); } /* path points to leaf/index in inode body */ /* we use in-core data, no need to protect them */ return 0; } /* * could return: * - EROFS * - ENOMEM * - EIO */ |
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#define ext4_ext_dirty(handle, inode, path) \ __ext4_ext_dirty(__func__, __LINE__, (handle), (inode), (path)) static int __ext4_ext_dirty(const char *where, unsigned int line, handle_t *handle, struct inode *inode, struct ext4_ext_path *path) |
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{ int err; if (path->p_bh) { /* path points to block */ |
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err = __ext4_handle_dirty_metadata(where, line, handle, inode, path->p_bh); |
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} else { /* path points to leaf/index in inode body */ err = ext4_mark_inode_dirty(handle, inode); } return err; } |
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static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode, |
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struct ext4_ext_path *path, |
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ext4_lblk_t block) |
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{ |
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if (path) { |
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int depth = path->p_depth; |
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struct ext4_extent *ex; |
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|
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/* * Try to predict block placement assuming that we are * filling in a file which will eventually be * non-sparse --- i.e., in the case of libbfd writing * an ELF object sections out-of-order but in a way * the eventually results in a contiguous object or * executable file, or some database extending a table * space file. However, this is actually somewhat * non-ideal if we are writing a sparse file such as * qemu or KVM writing a raw image file that is going * to stay fairly sparse, since it will end up * fragmenting the file system's free space. Maybe we * should have some hueristics or some way to allow * userspace to pass a hint to file system, |
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* especially if the latter case turns out to be |
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* common. */ |
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ex = path[depth].p_ext; |
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if (ex) { ext4_fsblk_t ext_pblk = ext4_ext_pblock(ex); ext4_lblk_t ext_block = le32_to_cpu(ex->ee_block); if (block > ext_block) return ext_pblk + (block - ext_block); else return ext_pblk - (ext_block - block); } |
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|
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/* it looks like index is empty; * try to find starting block from index itself */ |
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if (path[depth].p_bh) return path[depth].p_bh->b_blocknr; } /* OK. use inode's group */ |
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return ext4_inode_to_goal_block(inode); |
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} |
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/* * Allocation for a meta data block */ |
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static ext4_fsblk_t |
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ext4_ext_new_meta_block(handle_t *handle, struct inode *inode, |
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struct ext4_ext_path *path, |
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struct ext4_extent *ex, int *err, unsigned int flags) |
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{ |
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ext4_fsblk_t goal, newblock; |
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goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block)); |
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newblock = ext4_new_meta_blocks(handle, inode, goal, flags, NULL, err); |
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return newblock; } |
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static inline int ext4_ext_space_block(struct inode *inode, int check) |
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{ int size; size = (inode->i_sb->s_blocksize - sizeof(struct ext4_extent_header)) / sizeof(struct ext4_extent); |
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#ifdef AGGRESSIVE_TEST |
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if (!check && size > 6) size = 6; |
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#endif return size; } |
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static inline int ext4_ext_space_block_idx(struct inode *inode, int check) |
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{ int size; size = (inode->i_sb->s_blocksize - sizeof(struct ext4_extent_header)) / sizeof(struct ext4_extent_idx); |
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#ifdef AGGRESSIVE_TEST |
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if (!check && size > 5) size = 5; |
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#endif return size; } |
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static inline int ext4_ext_space_root(struct inode *inode, int check) |
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{ int size; size = sizeof(EXT4_I(inode)->i_data); size -= sizeof(struct ext4_extent_header); size /= sizeof(struct ext4_extent); |
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#ifdef AGGRESSIVE_TEST |
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if (!check && size > 3) size = 3; |
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#endif return size; } |
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static inline int ext4_ext_space_root_idx(struct inode *inode, int check) |
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{ int size; size = sizeof(EXT4_I(inode)->i_data); size -= sizeof(struct ext4_extent_header); size /= sizeof(struct ext4_extent_idx); |
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#ifdef AGGRESSIVE_TEST |
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if (!check && size > 4) size = 4; |
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#endif return size; } |
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/* * Calculate the number of metadata blocks needed * to allocate @blocks * Worse case is one block per extent */ |
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int ext4_ext_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock) |
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{ |
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struct ext4_inode_info *ei = EXT4_I(inode); |
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int idxs; |
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|
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idxs = ((inode->i_sb->s_blocksize - sizeof(struct ext4_extent_header)) / sizeof(struct ext4_extent_idx)); |
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/* |
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* If the new delayed allocation block is contiguous with the * previous da block, it can share index blocks with the * previous block, so we only need to allocate a new index * block every idxs leaf blocks. At ldxs**2 blocks, we need * an additional index block, and at ldxs**3 blocks, yet * another index blocks. |
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*/ |
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if (ei->i_da_metadata_calc_len && ei->i_da_metadata_calc_last_lblock+1 == lblock) { |
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int num = 0; |
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if ((ei->i_da_metadata_calc_len % idxs) == 0) num++; if ((ei->i_da_metadata_calc_len % (idxs*idxs)) == 0) num++; if ((ei->i_da_metadata_calc_len % (idxs*idxs*idxs)) == 0) { num++; ei->i_da_metadata_calc_len = 0; } else ei->i_da_metadata_calc_len++; ei->i_da_metadata_calc_last_lblock++; return num; } |
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|
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/* * In the worst case we need a new set of index blocks at * every level of the inode's extent tree. */ ei->i_da_metadata_calc_len = 1; ei->i_da_metadata_calc_last_lblock = lblock; return ext_depth(inode) + 1; |
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} |
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static int ext4_ext_max_entries(struct inode *inode, int depth) { int max; if (depth == ext_depth(inode)) { if (depth == 0) |
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max = ext4_ext_space_root(inode, 1); |
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else |
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max = ext4_ext_space_root_idx(inode, 1); |
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} else { if (depth == 0) |
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max = ext4_ext_space_block(inode, 1); |
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else |
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max = ext4_ext_space_block_idx(inode, 1); |
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} return max; } |
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static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext) { |
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ext4_fsblk_t block = ext4_ext_pblock(ext); |
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int len = ext4_ext_get_actual_len(ext); |
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|
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return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len); |
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} static int ext4_valid_extent_idx(struct inode *inode, struct ext4_extent_idx *ext_idx) { |
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ext4_fsblk_t block = ext4_idx_pblock(ext_idx); |
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|
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return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, 1); |
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} static int ext4_valid_extent_entries(struct inode *inode, struct ext4_extent_header *eh, int depth) { |
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unsigned short entries; if (eh->eh_entries == 0) return 1; entries = le16_to_cpu(eh->eh_entries); if (depth == 0) { /* leaf entries */ |
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struct ext4_extent *ext = EXT_FIRST_EXTENT(eh); |
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while (entries) { if (!ext4_valid_extent(inode, ext)) return 0; ext++; entries--; } } else { |
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struct ext4_extent_idx *ext_idx = EXT_FIRST_INDEX(eh); |
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while (entries) { if (!ext4_valid_extent_idx(inode, ext_idx)) return 0; ext_idx++; entries--; } } return 1; } |
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static int __ext4_ext_check(const char *function, unsigned int line, struct inode *inode, struct ext4_extent_header *eh, int depth) |
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{ const char *error_msg; int max = 0; if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) { error_msg = "invalid magic"; goto corrupted; } if (unlikely(le16_to_cpu(eh->eh_depth) != depth)) { error_msg = "unexpected eh_depth"; goto corrupted; } if (unlikely(eh->eh_max == 0)) { error_msg = "invalid eh_max"; goto corrupted; } max = ext4_ext_max_entries(inode, depth); if (unlikely(le16_to_cpu(eh->eh_max) > max)) { error_msg = "too large eh_max"; goto corrupted; } if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) { error_msg = "invalid eh_entries"; goto corrupted; } |
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if (!ext4_valid_extent_entries(inode, eh, depth)) { error_msg = "invalid extent entries"; goto corrupted; } |
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return 0; corrupted: |
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ext4_error_inode(inode, function, line, 0, |
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"bad header/extent: %s - magic %x, " |
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"entries %u, max %u(%u), depth %u(%u)", |
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error_msg, le16_to_cpu(eh->eh_magic), |
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le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max), max, le16_to_cpu(eh->eh_depth), depth); return -EIO; } |
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#define ext4_ext_check(inode, eh, depth) \ |
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__ext4_ext_check(__func__, __LINE__, inode, eh, depth) |
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|
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int ext4_ext_check_inode(struct inode *inode) { return ext4_ext_check(inode, ext_inode_hdr(inode), ext_depth(inode)); } |
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#ifdef EXT_DEBUG static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path) { int k, l = path->p_depth; ext_debug("path:"); for (k = 0; k <= l; k++, path++) { if (path->p_idx) { |
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ext_debug(" %d->%llu", le32_to_cpu(path->p_idx->ei_block), |
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ext4_idx_pblock(path->p_idx)); |
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} else if (path->p_ext) { |
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ext_debug(" %d:[%d]%d:%llu ", |
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le32_to_cpu(path->p_ext->ee_block), |
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ext4_ext_is_uninitialized(path->p_ext), |
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ext4_ext_get_actual_len(path->p_ext), |
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ext4_ext_pblock(path->p_ext)); |
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} else ext_debug(" []"); } ext_debug(" "); } static void ext4_ext_show_leaf(struct inode *inode, struct ext4_ext_path *path) { int depth = ext_depth(inode); struct ext4_extent_header *eh; struct ext4_extent *ex; int i; if (!path) return; eh = path[depth].p_hdr; ex = EXT_FIRST_EXTENT(eh); |
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ext_debug("Displaying leaf extents for inode %lu ", inode->i_ino); |
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for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ex++) { |
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ext_debug("%d:[%d]%d:%llu ", le32_to_cpu(ex->ee_block), ext4_ext_is_uninitialized(ex), |
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ext4_ext_get_actual_len(ex), ext4_ext_pblock(ex)); |
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} ext_debug(" "); } |
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static void ext4_ext_show_move(struct inode *inode, struct ext4_ext_path *path, ext4_fsblk_t newblock, int level) { int depth = ext_depth(inode); struct ext4_extent *ex; if (depth != level) { struct ext4_extent_idx *idx; idx = path[level].p_idx; while (idx <= EXT_MAX_INDEX(path[level].p_hdr)) { ext_debug("%d: move %d:%llu in new index %llu ", level, le32_to_cpu(idx->ei_block), ext4_idx_pblock(idx), newblock); idx++; } return; } ex = path[depth].p_ext; while (ex <= EXT_MAX_EXTENT(path[depth].p_hdr)) { ext_debug("move %d:%llu:[%d]%d in new leaf %llu ", le32_to_cpu(ex->ee_block), ext4_ext_pblock(ex), ext4_ext_is_uninitialized(ex), ext4_ext_get_actual_len(ex), newblock); ex++; } } |
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#else |
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#define ext4_ext_show_path(inode, path) #define ext4_ext_show_leaf(inode, path) |
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#define ext4_ext_show_move(inode, path, newblock, level) |
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#endif |
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void ext4_ext_drop_refs(struct ext4_ext_path *path) |
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{ int depth = path->p_depth; int i; for (i = 0; i <= depth; i++, path++) if (path->p_bh) { brelse(path->p_bh); path->p_bh = NULL; } } /* |
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* ext4_ext_binsearch_idx: * binary search for the closest index of the given block |
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* the header must be checked before calling this |
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*/ static void |
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ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, ext4_lblk_t block) |
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{ struct ext4_extent_header *eh = path->p_hdr; struct ext4_extent_idx *r, *l, *m; |
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|
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ext_debug("binsearch for %u(idx): ", block); |
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l = EXT_FIRST_INDEX(eh) + 1; |
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r = EXT_LAST_INDEX(eh); |
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while (l <= r) { m = l + (r - l) / 2; if (block < le32_to_cpu(m->ei_block)) r = m - 1; else l = m + 1; |
26d535ed2 Fix compilation w... |
499 500 501 |
ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ei_block), m, le32_to_cpu(m->ei_block), r, le32_to_cpu(r->ei_block)); |
a86c61812 [PATCH] ext3: add... |
502 503 504 |
} path->p_idx = l - 1; |
f65e6fba1 [PATCH] ext4: 48b... |
505 |
ext_debug(" -> %d->%lld ", le32_to_cpu(path->p_idx->ei_block), |
bf89d16f6 ext4: rename {ext... |
506 |
ext4_idx_pblock(path->p_idx)); |
a86c61812 [PATCH] ext3: add... |
507 508 509 510 511 512 513 514 515 516 |
#ifdef CHECK_BINSEARCH { struct ext4_extent_idx *chix, *ix; int k; chix = ix = EXT_FIRST_INDEX(eh); for (k = 0; k < le16_to_cpu(eh->eh_entries); k++, ix++) { if (k != 0 && le32_to_cpu(ix->ei_block) <= le32_to_cpu(ix[-1].ei_block)) { |
4776004f5 ext4: Add printk ... |
517 518 519 520 521 522 |
printk(KERN_DEBUG "k=%d, ix=0x%p, " "first=0x%p ", k, ix, EXT_FIRST_INDEX(eh)); printk(KERN_DEBUG "%u <= %u ", |
a86c61812 [PATCH] ext3: add... |
523 524 525 526 |
le32_to_cpu(ix->ei_block), le32_to_cpu(ix[-1].ei_block)); } BUG_ON(k && le32_to_cpu(ix->ei_block) |
8c55e2041 EXT4: Fix whitespace |
527 |
<= le32_to_cpu(ix[-1].ei_block)); |
a86c61812 [PATCH] ext3: add... |
528 529 530 531 532 533 534 535 536 537 538 |
if (block < le32_to_cpu(ix->ei_block)) break; chix = ix; } BUG_ON(chix != path->p_idx); } #endif } /* |
d0d856e8b [PATCH] ext4: cle... |
539 540 |
* ext4_ext_binsearch: * binary search for closest extent of the given block |
c29c0ae7f ext4: Make extent... |
541 |
* the header must be checked before calling this |
a86c61812 [PATCH] ext3: add... |
542 543 |
*/ static void |
725d26d3f ext4: Introduce e... |
544 545 |
ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, ext4_lblk_t block) |
a86c61812 [PATCH] ext3: add... |
546 547 548 |
{ struct ext4_extent_header *eh = path->p_hdr; struct ext4_extent *r, *l, *m; |
a86c61812 [PATCH] ext3: add... |
549 550 |
if (eh->eh_entries == 0) { /* |
d0d856e8b [PATCH] ext4: cle... |
551 552 |
* this leaf is empty: * we get such a leaf in split/add case |
a86c61812 [PATCH] ext3: add... |
553 554 555 |
*/ return; } |
bba907433 ext4 extents: rem... |
556 |
ext_debug("binsearch for %u: ", block); |
a86c61812 [PATCH] ext3: add... |
557 558 |
l = EXT_FIRST_EXTENT(eh) + 1; |
e9f410b1c ext4: extent macr... |
559 |
r = EXT_LAST_EXTENT(eh); |
a86c61812 [PATCH] ext3: add... |
560 561 562 563 564 565 566 |
while (l <= r) { m = l + (r - l) / 2; if (block < le32_to_cpu(m->ee_block)) r = m - 1; else l = m + 1; |
26d535ed2 Fix compilation w... |
567 568 569 |
ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ee_block), m, le32_to_cpu(m->ee_block), r, le32_to_cpu(r->ee_block)); |
a86c61812 [PATCH] ext3: add... |
570 571 572 |
} path->p_ext = l - 1; |
553f90089 ext4: Show unwrit... |
573 |
ext_debug(" -> %d:%llu:[%d]%d ", |
8c55e2041 EXT4: Fix whitespace |
574 |
le32_to_cpu(path->p_ext->ee_block), |
bf89d16f6 ext4: rename {ext... |
575 |
ext4_ext_pblock(path->p_ext), |
553f90089 ext4: Show unwrit... |
576 |
ext4_ext_is_uninitialized(path->p_ext), |
a2df2a634 fallocate support... |
577 |
ext4_ext_get_actual_len(path->p_ext)); |
a86c61812 [PATCH] ext3: add... |
578 579 580 581 582 583 584 585 586 |
#ifdef CHECK_BINSEARCH { struct ext4_extent *chex, *ex; int k; chex = ex = EXT_FIRST_EXTENT(eh); for (k = 0; k < le16_to_cpu(eh->eh_entries); k++, ex++) { BUG_ON(k && le32_to_cpu(ex->ee_block) |
8c55e2041 EXT4: Fix whitespace |
587 |
<= le32_to_cpu(ex[-1].ee_block)); |
a86c61812 [PATCH] ext3: add... |
588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 |
if (block < le32_to_cpu(ex->ee_block)) break; chex = ex; } BUG_ON(chex != path->p_ext); } #endif } int ext4_ext_tree_init(handle_t *handle, struct inode *inode) { struct ext4_extent_header *eh; eh = ext_inode_hdr(inode); eh->eh_depth = 0; eh->eh_entries = 0; eh->eh_magic = EXT4_EXT_MAGIC; |
55ad63bf3 ext4: fix extent ... |
606 |
eh->eh_max = cpu_to_le16(ext4_ext_space_root(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
607 608 609 610 611 612 |
ext4_mark_inode_dirty(handle, inode); ext4_ext_invalidate_cache(inode); return 0; } struct ext4_ext_path * |
725d26d3f ext4: Introduce e... |
613 614 |
ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block, struct ext4_ext_path *path) |
a86c61812 [PATCH] ext3: add... |
615 616 617 618 619 620 |
{ struct ext4_extent_header *eh; struct buffer_head *bh; short int depth, i, ppos = 0, alloc = 0; eh = ext_inode_hdr(inode); |
c29c0ae7f ext4: Make extent... |
621 |
depth = ext_depth(inode); |
a86c61812 [PATCH] ext3: add... |
622 623 624 |
/* account possible depth increase */ if (!path) { |
5d4958f92 [PATCH] ext4: kma... |
625 |
path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 2), |
a86c61812 [PATCH] ext3: add... |
626 627 628 629 630 |
GFP_NOFS); if (!path) return ERR_PTR(-ENOMEM); alloc = 1; } |
a86c61812 [PATCH] ext3: add... |
631 |
path[0].p_hdr = eh; |
1973adcba ext4: Make ext4_e... |
632 |
path[0].p_bh = NULL; |
a86c61812 [PATCH] ext3: add... |
633 |
|
c29c0ae7f ext4: Make extent... |
634 |
i = depth; |
a86c61812 [PATCH] ext3: add... |
635 636 |
/* walk through the tree */ while (i) { |
7a262f7c6 ext4: Validate ex... |
637 |
int need_to_validate = 0; |
a86c61812 [PATCH] ext3: add... |
638 639 640 |
ext_debug("depth %d: num %d, max %d ", ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max)); |
c29c0ae7f ext4: Make extent... |
641 |
|
a86c61812 [PATCH] ext3: add... |
642 |
ext4_ext_binsearch_idx(inode, path + ppos, block); |
bf89d16f6 ext4: rename {ext... |
643 |
path[ppos].p_block = ext4_idx_pblock(path[ppos].p_idx); |
a86c61812 [PATCH] ext3: add... |
644 645 |
path[ppos].p_depth = i; path[ppos].p_ext = NULL; |
7a262f7c6 ext4: Validate ex... |
646 647 |
bh = sb_getblk(inode->i_sb, path[ppos].p_block); if (unlikely(!bh)) |
a86c61812 [PATCH] ext3: add... |
648 |
goto err; |
7a262f7c6 ext4: Validate ex... |
649 |
if (!bh_uptodate_or_lock(bh)) { |
0562e0bad ext4: add more tr... |
650 651 |
trace_ext4_ext_load_extent(inode, block, path[ppos].p_block); |
7a262f7c6 ext4: Validate ex... |
652 653 654 655 656 657 658 |
if (bh_submit_read(bh) < 0) { put_bh(bh); goto err; } /* validate the extent entries */ need_to_validate = 1; } |
a86c61812 [PATCH] ext3: add... |
659 660 |
eh = ext_block_hdr(bh); ppos++; |
273df556b ext4: Convert BUG... |
661 662 663 664 665 666 |
if (unlikely(ppos > depth)) { put_bh(bh); EXT4_ERROR_INODE(inode, "ppos %d > depth %d", ppos, depth); goto err; } |
a86c61812 [PATCH] ext3: add... |
667 668 669 |
path[ppos].p_bh = bh; path[ppos].p_hdr = eh; i--; |
7a262f7c6 ext4: Validate ex... |
670 |
if (need_to_validate && ext4_ext_check(inode, eh, i)) |
a86c61812 [PATCH] ext3: add... |
671 672 673 674 |
goto err; } path[ppos].p_depth = i; |
a86c61812 [PATCH] ext3: add... |
675 676 |
path[ppos].p_ext = NULL; path[ppos].p_idx = NULL; |
a86c61812 [PATCH] ext3: add... |
677 678 |
/* find extent */ ext4_ext_binsearch(inode, path + ppos, block); |
1973adcba ext4: Make ext4_e... |
679 680 |
/* if not an empty leaf */ if (path[ppos].p_ext) |
bf89d16f6 ext4: rename {ext... |
681 |
path[ppos].p_block = ext4_ext_pblock(path[ppos].p_ext); |
a86c61812 [PATCH] ext3: add... |
682 683 684 685 686 687 688 689 690 691 692 693 694 |
ext4_ext_show_path(inode, path); return path; err: ext4_ext_drop_refs(path); if (alloc) kfree(path); return ERR_PTR(-EIO); } /* |
d0d856e8b [PATCH] ext4: cle... |
695 696 697 |
* ext4_ext_insert_index: * insert new index [@logical;@ptr] into the block at @curp; * check where to insert: before @curp or after @curp |
a86c61812 [PATCH] ext3: add... |
698 |
*/ |
1f109d5a1 ext4: make variou... |
699 700 701 |
static int ext4_ext_insert_index(handle_t *handle, struct inode *inode, struct ext4_ext_path *curp, int logical, ext4_fsblk_t ptr) |
a86c61812 [PATCH] ext3: add... |
702 703 704 |
{ struct ext4_extent_idx *ix; int len, err; |
7e0289766 [PATCH] ext4: if ... |
705 706 |
err = ext4_ext_get_access(handle, inode, curp); if (err) |
a86c61812 [PATCH] ext3: add... |
707 |
return err; |
273df556b ext4: Convert BUG... |
708 709 710 711 712 713 |
if (unlikely(logical == le32_to_cpu(curp->p_idx->ei_block))) { EXT4_ERROR_INODE(inode, "logical %d == ei_block %d!", logical, le32_to_cpu(curp->p_idx->ei_block)); return -EIO; } |
d46203159 ext4: avoid eh_en... |
714 715 716 717 718 719 720 721 722 |
if (unlikely(le16_to_cpu(curp->p_hdr->eh_entries) >= le16_to_cpu(curp->p_hdr->eh_max))) { EXT4_ERROR_INODE(inode, "eh_entries %d >= eh_max %d!", le16_to_cpu(curp->p_hdr->eh_entries), le16_to_cpu(curp->p_hdr->eh_max)); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
723 724 |
if (logical > le32_to_cpu(curp->p_idx->ei_block)) { /* insert after */ |
80e675f90 ext4: optimize me... |
725 726 |
ext_debug("insert new index %d after: %llu ", logical, ptr); |
a86c61812 [PATCH] ext3: add... |
727 728 729 |
ix = curp->p_idx + 1; } else { /* insert before */ |
80e675f90 ext4: optimize me... |
730 731 |
ext_debug("insert new index %d before: %llu ", logical, ptr); |
a86c61812 [PATCH] ext3: add... |
732 733 |
ix = curp->p_idx; } |
80e675f90 ext4: optimize me... |
734 735 736 737 738 739 740 741 742 |
len = EXT_LAST_INDEX(curp->p_hdr) - ix + 1; BUG_ON(len < 0); if (len > 0) { ext_debug("insert new index %d: " "move %d indices from 0x%p to 0x%p ", logical, len, ix, ix + 1); memmove(ix + 1, ix, len * sizeof(struct ext4_extent_idx)); } |
f472e0266 ext4: avoid stamp... |
743 744 745 746 |
if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) { EXT4_ERROR_INODE(inode, "ix > EXT_MAX_INDEX!"); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
747 |
ix->ei_block = cpu_to_le32(logical); |
f65e6fba1 [PATCH] ext4: 48b... |
748 |
ext4_idx_store_pblock(ix, ptr); |
e8546d061 ext4: le*_add_cpu... |
749 |
le16_add_cpu(&curp->p_hdr->eh_entries, 1); |
a86c61812 [PATCH] ext3: add... |
750 |
|
273df556b ext4: Convert BUG... |
751 752 753 754 |
if (unlikely(ix > EXT_LAST_INDEX(curp->p_hdr))) { EXT4_ERROR_INODE(inode, "ix > EXT_LAST_INDEX!"); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
755 756 757 758 759 760 761 762 |
err = ext4_ext_dirty(handle, inode, curp); ext4_std_error(inode->i_sb, err); return err; } /* |
d0d856e8b [PATCH] ext4: cle... |
763 764 765 766 767 768 769 770 |
* ext4_ext_split: * inserts new subtree into the path, using free index entry * at depth @at: * - allocates all needed blocks (new leaf and all intermediate index blocks) * - makes decision where to split * - moves remaining extents and index entries (right to the split point) * into the newly allocated blocks * - initializes subtree |
a86c61812 [PATCH] ext3: add... |
771 772 |
*/ static int ext4_ext_split(handle_t *handle, struct inode *inode, |
55f020db6 ext4: add flag to... |
773 774 775 |
unsigned int flags, struct ext4_ext_path *path, struct ext4_extent *newext, int at) |
a86c61812 [PATCH] ext3: add... |
776 777 778 779 780 |
{ struct buffer_head *bh = NULL; int depth = ext_depth(inode); struct ext4_extent_header *neh; struct ext4_extent_idx *fidx; |
a86c61812 [PATCH] ext3: add... |
781 |
int i = at, k, m, a; |
f65e6fba1 [PATCH] ext4: 48b... |
782 |
ext4_fsblk_t newblock, oldblock; |
a86c61812 [PATCH] ext3: add... |
783 |
__le32 border; |
f65e6fba1 [PATCH] ext4: 48b... |
784 |
ext4_fsblk_t *ablocks = NULL; /* array of allocated blocks */ |
a86c61812 [PATCH] ext3: add... |
785 786 787 |
int err = 0; /* make decision: where to split? */ |
d0d856e8b [PATCH] ext4: cle... |
788 |
/* FIXME: now decision is simplest: at current extent */ |
a86c61812 [PATCH] ext3: add... |
789 |
|
d0d856e8b [PATCH] ext4: cle... |
790 |
/* if current leaf will be split, then we should use |
a86c61812 [PATCH] ext3: add... |
791 |
* border from split point */ |
273df556b ext4: Convert BUG... |
792 793 794 795 |
if (unlikely(path[depth].p_ext > EXT_MAX_EXTENT(path[depth].p_hdr))) { EXT4_ERROR_INODE(inode, "p_ext > EXT_MAX_EXTENT!"); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
796 797 |
if (path[depth].p_ext != EXT_MAX_EXTENT(path[depth].p_hdr)) { border = path[depth].p_ext[1].ee_block; |
d0d856e8b [PATCH] ext4: cle... |
798 |
ext_debug("leaf will be split." |
a86c61812 [PATCH] ext3: add... |
799 800 |
" next leaf starts at %d ", |
8c55e2041 EXT4: Fix whitespace |
801 |
le32_to_cpu(border)); |
a86c61812 [PATCH] ext3: add... |
802 803 804 805 806 |
} else { border = newext->ee_block; ext_debug("leaf will be added." " next leaf starts at %d ", |
8c55e2041 EXT4: Fix whitespace |
807 |
le32_to_cpu(border)); |
a86c61812 [PATCH] ext3: add... |
808 809 810 |
} /* |
d0d856e8b [PATCH] ext4: cle... |
811 812 |
* If error occurs, then we break processing * and mark filesystem read-only. index won't |
a86c61812 [PATCH] ext3: add... |
813 |
* be inserted and tree will be in consistent |
d0d856e8b [PATCH] ext4: cle... |
814 |
* state. Next mount will repair buffers too. |
a86c61812 [PATCH] ext3: add... |
815 816 817 |
*/ /* |
d0d856e8b [PATCH] ext4: cle... |
818 819 820 |
* Get array to track all allocated blocks. * We need this to handle errors and free blocks * upon them. |
a86c61812 [PATCH] ext3: add... |
821 |
*/ |
5d4958f92 [PATCH] ext4: kma... |
822 |
ablocks = kzalloc(sizeof(ext4_fsblk_t) * depth, GFP_NOFS); |
a86c61812 [PATCH] ext3: add... |
823 824 |
if (!ablocks) return -ENOMEM; |
a86c61812 [PATCH] ext3: add... |
825 826 827 828 829 |
/* allocate all needed blocks */ ext_debug("allocate %d blocks for indexes/leaf ", depth - at); for (a = 0; a < depth - at; a++) { |
654b4908b ext4: cleanup blo... |
830 |
newblock = ext4_ext_new_meta_block(handle, inode, path, |
55f020db6 ext4: add flag to... |
831 |
newext, &err, flags); |
a86c61812 [PATCH] ext3: add... |
832 833 834 835 836 837 838 |
if (newblock == 0) goto cleanup; ablocks[a] = newblock; } /* initialize new leaf */ newblock = ablocks[--a]; |
273df556b ext4: Convert BUG... |
839 840 841 842 843 |
if (unlikely(newblock == 0)) { EXT4_ERROR_INODE(inode, "newblock == 0!"); err = -EIO; goto cleanup; } |
a86c61812 [PATCH] ext3: add... |
844 845 846 847 848 849 |
bh = sb_getblk(inode->i_sb, newblock); if (!bh) { err = -EIO; goto cleanup; } lock_buffer(bh); |
7e0289766 [PATCH] ext4: if ... |
850 851 |
err = ext4_journal_get_create_access(handle, bh); if (err) |
a86c61812 [PATCH] ext3: add... |
852 853 854 855 |
goto cleanup; neh = ext_block_hdr(bh); neh->eh_entries = 0; |
55ad63bf3 ext4: fix extent ... |
856 |
neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
857 858 |
neh->eh_magic = EXT4_EXT_MAGIC; neh->eh_depth = 0; |
a86c61812 [PATCH] ext3: add... |
859 |
|
d0d856e8b [PATCH] ext4: cle... |
860 |
/* move remainder of path[depth] to the new leaf */ |
273df556b ext4: Convert BUG... |
861 862 863 864 865 866 867 868 |
if (unlikely(path[depth].p_hdr->eh_entries != path[depth].p_hdr->eh_max)) { EXT4_ERROR_INODE(inode, "eh_entries %d != eh_max %d!", path[depth].p_hdr->eh_entries, path[depth].p_hdr->eh_max); err = -EIO; goto cleanup; } |
a86c61812 [PATCH] ext3: add... |
869 |
/* start copy from next extent */ |
1b16da77f ext4: teach ext4_... |
870 871 |
m = EXT_MAX_EXTENT(path[depth].p_hdr) - path[depth].p_ext++; ext4_ext_show_move(inode, path, newblock, depth); |
a86c61812 [PATCH] ext3: add... |
872 |
if (m) { |
1b16da77f ext4: teach ext4_... |
873 874 875 |
struct ext4_extent *ex; ex = EXT_FIRST_EXTENT(neh); memmove(ex, path[depth].p_ext, sizeof(struct ext4_extent) * m); |
e8546d061 ext4: le*_add_cpu... |
876 |
le16_add_cpu(&neh->eh_entries, m); |
a86c61812 [PATCH] ext3: add... |
877 878 879 880 |
} set_buffer_uptodate(bh); unlock_buffer(bh); |
0390131ba ext4: Allow ext4 ... |
881 |
err = ext4_handle_dirty_metadata(handle, inode, bh); |
7e0289766 [PATCH] ext4: if ... |
882 |
if (err) |
a86c61812 [PATCH] ext3: add... |
883 884 885 886 887 888 |
goto cleanup; brelse(bh); bh = NULL; /* correct old leaf */ if (m) { |
7e0289766 [PATCH] ext4: if ... |
889 890 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) |
a86c61812 [PATCH] ext3: add... |
891 |
goto cleanup; |
e8546d061 ext4: le*_add_cpu... |
892 |
le16_add_cpu(&path[depth].p_hdr->eh_entries, -m); |
7e0289766 [PATCH] ext4: if ... |
893 894 |
err = ext4_ext_dirty(handle, inode, path + depth); if (err) |
a86c61812 [PATCH] ext3: add... |
895 896 897 898 899 900 |
goto cleanup; } /* create intermediate indexes */ k = depth - at - 1; |
273df556b ext4: Convert BUG... |
901 902 903 904 905 |
if (unlikely(k < 0)) { EXT4_ERROR_INODE(inode, "k %d < 0!", k); err = -EIO; goto cleanup; } |
a86c61812 [PATCH] ext3: add... |
906 907 908 909 910 911 912 913 914 |
if (k) ext_debug("create %d intermediate indices ", k); /* insert new index into current index block */ /* current depth stored in i var */ i = depth - 1; while (k--) { oldblock = newblock; newblock = ablocks[--a]; |
bba907433 ext4 extents: rem... |
915 |
bh = sb_getblk(inode->i_sb, newblock); |
a86c61812 [PATCH] ext3: add... |
916 917 918 919 920 |
if (!bh) { err = -EIO; goto cleanup; } lock_buffer(bh); |
7e0289766 [PATCH] ext4: if ... |
921 922 |
err = ext4_journal_get_create_access(handle, bh); if (err) |
a86c61812 [PATCH] ext3: add... |
923 924 925 926 927 |
goto cleanup; neh = ext_block_hdr(bh); neh->eh_entries = cpu_to_le16(1); neh->eh_magic = EXT4_EXT_MAGIC; |
55ad63bf3 ext4: fix extent ... |
928 |
neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
929 930 931 |
neh->eh_depth = cpu_to_le16(depth - i); fidx = EXT_FIRST_INDEX(neh); fidx->ei_block = border; |
f65e6fba1 [PATCH] ext4: 48b... |
932 |
ext4_idx_store_pblock(fidx, oldblock); |
a86c61812 [PATCH] ext3: add... |
933 |
|
bba907433 ext4 extents: rem... |
934 935 936 |
ext_debug("int.index at %d (block %llu): %u -> %llu ", i, newblock, le32_to_cpu(border), oldblock); |
a86c61812 [PATCH] ext3: add... |
937 |
|
1b16da77f ext4: teach ext4_... |
938 |
/* move remainder of path[i] to the new index block */ |
273df556b ext4: Convert BUG... |
939 940 941 942 943 944 945 946 |
if (unlikely(EXT_MAX_INDEX(path[i].p_hdr) != EXT_LAST_INDEX(path[i].p_hdr))) { EXT4_ERROR_INODE(inode, "EXT_MAX_INDEX != EXT_LAST_INDEX ee_block %d!", le32_to_cpu(path[i].p_ext->ee_block)); err = -EIO; goto cleanup; } |
1b16da77f ext4: teach ext4_... |
947 948 949 950 951 952 |
/* start copy indexes */ m = EXT_MAX_INDEX(path[i].p_hdr) - path[i].p_idx++; ext_debug("cur 0x%p, last 0x%p ", path[i].p_idx, EXT_MAX_INDEX(path[i].p_hdr)); ext4_ext_show_move(inode, path, newblock, i); |
a86c61812 [PATCH] ext3: add... |
953 |
if (m) { |
1b16da77f ext4: teach ext4_... |
954 |
memmove(++fidx, path[i].p_idx, |
a86c61812 [PATCH] ext3: add... |
955 |
sizeof(struct ext4_extent_idx) * m); |
e8546d061 ext4: le*_add_cpu... |
956 |
le16_add_cpu(&neh->eh_entries, m); |
a86c61812 [PATCH] ext3: add... |
957 958 959 |
} set_buffer_uptodate(bh); unlock_buffer(bh); |
0390131ba ext4: Allow ext4 ... |
960 |
err = ext4_handle_dirty_metadata(handle, inode, bh); |
7e0289766 [PATCH] ext4: if ... |
961 |
if (err) |
a86c61812 [PATCH] ext3: add... |
962 963 964 965 966 967 968 969 970 |
goto cleanup; brelse(bh); bh = NULL; /* correct old index */ if (m) { err = ext4_ext_get_access(handle, inode, path + i); if (err) goto cleanup; |
e8546d061 ext4: le*_add_cpu... |
971 |
le16_add_cpu(&path[i].p_hdr->eh_entries, -m); |
a86c61812 [PATCH] ext3: add... |
972 973 974 975 976 977 978 979 980 |
err = ext4_ext_dirty(handle, inode, path + i); if (err) goto cleanup; } i--; } /* insert new index */ |
a86c61812 [PATCH] ext3: add... |
981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 |
err = ext4_ext_insert_index(handle, inode, path + at, le32_to_cpu(border), newblock); cleanup: if (bh) { if (buffer_locked(bh)) unlock_buffer(bh); brelse(bh); } if (err) { /* free all allocated blocks in error case */ for (i = 0; i < depth; i++) { if (!ablocks[i]) continue; |
7dc576158 ext4: Fix sparse ... |
996 |
ext4_free_blocks(handle, inode, NULL, ablocks[i], 1, |
e6362609b ext4: call ext4_f... |
997 |
EXT4_FREE_BLOCKS_METADATA); |
a86c61812 [PATCH] ext3: add... |
998 999 1000 1001 1002 1003 1004 1005 |
} } kfree(ablocks); return err; } /* |
d0d856e8b [PATCH] ext4: cle... |
1006 1007 1008 1009 1010 1011 |
* ext4_ext_grow_indepth: * implements tree growing procedure: * - allocates new block * - moves top-level data (index block or leaf) into the new block * - initializes new top-level, creating index that points to the * just created block |
a86c61812 [PATCH] ext3: add... |
1012 1013 |
*/ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode, |
55f020db6 ext4: add flag to... |
1014 |
unsigned int flags, |
55f020db6 ext4: add flag to... |
1015 |
struct ext4_extent *newext) |
a86c61812 [PATCH] ext3: add... |
1016 |
{ |
a86c61812 [PATCH] ext3: add... |
1017 |
struct ext4_extent_header *neh; |
a86c61812 [PATCH] ext3: add... |
1018 |
struct buffer_head *bh; |
f65e6fba1 [PATCH] ext4: 48b... |
1019 |
ext4_fsblk_t newblock; |
a86c61812 [PATCH] ext3: add... |
1020 |
int err = 0; |
1939dd84b ext4: cleanup ext... |
1021 |
newblock = ext4_ext_new_meta_block(handle, inode, NULL, |
55f020db6 ext4: add flag to... |
1022 |
newext, &err, flags); |
a86c61812 [PATCH] ext3: add... |
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 |
if (newblock == 0) return err; bh = sb_getblk(inode->i_sb, newblock); if (!bh) { err = -EIO; ext4_std_error(inode->i_sb, err); return err; } lock_buffer(bh); |
7e0289766 [PATCH] ext4: if ... |
1033 1034 |
err = ext4_journal_get_create_access(handle, bh); if (err) { |
a86c61812 [PATCH] ext3: add... |
1035 1036 1037 1038 1039 |
unlock_buffer(bh); goto out; } /* move top-level index/leaf into new block */ |
1939dd84b ext4: cleanup ext... |
1040 1041 |
memmove(bh->b_data, EXT4_I(inode)->i_data, sizeof(EXT4_I(inode)->i_data)); |
a86c61812 [PATCH] ext3: add... |
1042 1043 1044 1045 1046 1047 |
/* set size of new block */ neh = ext_block_hdr(bh); /* old root could have indexes or leaves * so calculate e_max right way */ if (ext_depth(inode)) |
55ad63bf3 ext4: fix extent ... |
1048 |
neh->eh_max = cpu_to_le16(ext4_ext_space_block_idx(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
1049 |
else |
55ad63bf3 ext4: fix extent ... |
1050 |
neh->eh_max = cpu_to_le16(ext4_ext_space_block(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
1051 1052 1053 |
neh->eh_magic = EXT4_EXT_MAGIC; set_buffer_uptodate(bh); unlock_buffer(bh); |
0390131ba ext4: Allow ext4 ... |
1054 |
err = ext4_handle_dirty_metadata(handle, inode, bh); |
7e0289766 [PATCH] ext4: if ... |
1055 |
if (err) |
a86c61812 [PATCH] ext3: add... |
1056 |
goto out; |
1939dd84b ext4: cleanup ext... |
1057 |
/* Update top-level index: num,max,pointer */ |
a86c61812 [PATCH] ext3: add... |
1058 |
neh = ext_inode_hdr(inode); |
1939dd84b ext4: cleanup ext... |
1059 1060 1061 1062 1063 1064 1065 1066 |
neh->eh_entries = cpu_to_le16(1); ext4_idx_store_pblock(EXT_FIRST_INDEX(neh), newblock); if (neh->eh_depth == 0) { /* Root extent block becomes index block */ neh->eh_max = cpu_to_le16(ext4_ext_space_root_idx(inode, 0)); EXT_FIRST_INDEX(neh)->ei_block = EXT_FIRST_EXTENT(neh)->ee_block; } |
2ae021076 [PATCH] ext4: blk... |
1067 1068 |
ext_debug("new root: num %d(%d), lblock %d, ptr %llu ", |
a86c61812 [PATCH] ext3: add... |
1069 |
le16_to_cpu(neh->eh_entries), le16_to_cpu(neh->eh_max), |
5a0790c2c ext4: remove init... |
1070 |
le32_to_cpu(EXT_FIRST_INDEX(neh)->ei_block), |
bf89d16f6 ext4: rename {ext... |
1071 |
ext4_idx_pblock(EXT_FIRST_INDEX(neh))); |
a86c61812 [PATCH] ext3: add... |
1072 |
|
b4611abfa ext4: Fix crash d... |
1073 |
neh->eh_depth = cpu_to_le16(le16_to_cpu(neh->eh_depth) + 1); |
1939dd84b ext4: cleanup ext... |
1074 |
ext4_mark_inode_dirty(handle, inode); |
a86c61812 [PATCH] ext3: add... |
1075 1076 1077 1078 1079 1080 1081 |
out: brelse(bh); return err; } /* |
d0d856e8b [PATCH] ext4: cle... |
1082 1083 1084 |
* ext4_ext_create_new_leaf: * finds empty index and adds new leaf. * if no free index is found, then it requests in-depth growing. |
a86c61812 [PATCH] ext3: add... |
1085 1086 |
*/ static int ext4_ext_create_new_leaf(handle_t *handle, struct inode *inode, |
55f020db6 ext4: add flag to... |
1087 1088 1089 |
unsigned int flags, struct ext4_ext_path *path, struct ext4_extent *newext) |
a86c61812 [PATCH] ext3: add... |
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 |
{ struct ext4_ext_path *curp; int depth, i, err = 0; repeat: i = depth = ext_depth(inode); /* walk up to the tree and look for free index entry */ curp = path + depth; while (i > 0 && !EXT_HAS_FREE_INDEX(curp)) { i--; curp--; } |
d0d856e8b [PATCH] ext4: cle... |
1103 1104 |
/* we use already allocated block for index block, * so subsequent data blocks should be contiguous */ |
a86c61812 [PATCH] ext3: add... |
1105 1106 1107 |
if (EXT_HAS_FREE_INDEX(curp)) { /* if we found index with free entry, then use that * entry: create all needed subtree and add new leaf */ |
55f020db6 ext4: add flag to... |
1108 |
err = ext4_ext_split(handle, inode, flags, path, newext, i); |
787e0981f ext4: return erro... |
1109 1110 |
if (err) goto out; |
a86c61812 [PATCH] ext3: add... |
1111 1112 1113 1114 |
/* refill path */ ext4_ext_drop_refs(path); path = ext4_ext_find_extent(inode, |
725d26d3f ext4: Introduce e... |
1115 1116 |
(ext4_lblk_t)le32_to_cpu(newext->ee_block), path); |
a86c61812 [PATCH] ext3: add... |
1117 1118 1119 1120 |
if (IS_ERR(path)) err = PTR_ERR(path); } else { /* tree is full, time to grow in depth */ |
1939dd84b ext4: cleanup ext... |
1121 |
err = ext4_ext_grow_indepth(handle, inode, flags, newext); |
a86c61812 [PATCH] ext3: add... |
1122 1123 1124 1125 1126 1127 |
if (err) goto out; /* refill path */ ext4_ext_drop_refs(path); path = ext4_ext_find_extent(inode, |
725d26d3f ext4: Introduce e... |
1128 1129 |
(ext4_lblk_t)le32_to_cpu(newext->ee_block), path); |
a86c61812 [PATCH] ext3: add... |
1130 1131 1132 1133 1134 1135 |
if (IS_ERR(path)) { err = PTR_ERR(path); goto out; } /* |
d0d856e8b [PATCH] ext4: cle... |
1136 1137 |
* only first (depth 0 -> 1) produces free space; * in all other cases we have to split the grown tree |
a86c61812 [PATCH] ext3: add... |
1138 1139 1140 |
*/ depth = ext_depth(inode); if (path[depth].p_hdr->eh_entries == path[depth].p_hdr->eh_max) { |
d0d856e8b [PATCH] ext4: cle... |
1141 |
/* now we need to split */ |
a86c61812 [PATCH] ext3: add... |
1142 1143 1144 1145 1146 1147 1148 1149 1150 |
goto repeat; } } out: return err; } /* |
1988b51e4 ext4: Add new fun... |
1151 1152 1153 1154 1155 1156 |
* search the closest allocated block to the left for *logical * and returns it at @logical + it's physical address at @phys * if *logical is the smallest allocated block, the function * returns 0 at @phys * return value contains 0 (success) or error code */ |
1f109d5a1 ext4: make variou... |
1157 1158 1159 |
static int ext4_ext_search_left(struct inode *inode, struct ext4_ext_path *path, ext4_lblk_t *logical, ext4_fsblk_t *phys) |
1988b51e4 ext4: Add new fun... |
1160 1161 1162 |
{ struct ext4_extent_idx *ix; struct ext4_extent *ex; |
b939e3766 ext4: Use the ext... |
1163 |
int depth, ee_len; |
1988b51e4 ext4: Add new fun... |
1164 |
|
273df556b ext4: Convert BUG... |
1165 1166 1167 1168 |
if (unlikely(path == NULL)) { EXT4_ERROR_INODE(inode, "path == NULL *logical %d!", *logical); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
depth = path->p_depth; *phys = 0; if (depth == 0 && path->p_ext == NULL) return 0; /* usually extent in the path covers blocks smaller * then *logical, but it can be that extent is the * first one in the file */ ex = path[depth].p_ext; |
b939e3766 ext4: Use the ext... |
1180 |
ee_len = ext4_ext_get_actual_len(ex); |
1988b51e4 ext4: Add new fun... |
1181 |
if (*logical < le32_to_cpu(ex->ee_block)) { |
273df556b ext4: Convert BUG... |
1182 1183 1184 1185 1186 1187 |
if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) { EXT4_ERROR_INODE(inode, "EXT_FIRST_EXTENT != ex *logical %d ee_block %d!", *logical, le32_to_cpu(ex->ee_block)); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1188 1189 |
while (--depth >= 0) { ix = path[depth].p_idx; |
273df556b ext4: Convert BUG... |
1190 1191 1192 |
if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) { EXT4_ERROR_INODE(inode, "ix (%d) != EXT_FIRST_INDEX (%d) (depth %d)!", |
6ee3b2122 ext4: use le32_to... |
1193 |
ix != NULL ? le32_to_cpu(ix->ei_block) : 0, |
273df556b ext4: Convert BUG... |
1194 |
EXT_FIRST_INDEX(path[depth].p_hdr) != NULL ? |
6ee3b2122 ext4: use le32_to... |
1195 |
le32_to_cpu(EXT_FIRST_INDEX(path[depth].p_hdr)->ei_block) : 0, |
273df556b ext4: Convert BUG... |
1196 1197 1198 |
depth); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1199 1200 1201 |
} return 0; } |
273df556b ext4: Convert BUG... |
1202 1203 1204 1205 1206 1207 |
if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) { EXT4_ERROR_INODE(inode, "logical %d < ee_block %d + ee_len %d!", *logical, le32_to_cpu(ex->ee_block), ee_len); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1208 |
|
b939e3766 ext4: Use the ext... |
1209 |
*logical = le32_to_cpu(ex->ee_block) + ee_len - 1; |
bf89d16f6 ext4: rename {ext... |
1210 |
*phys = ext4_ext_pblock(ex) + ee_len - 1; |
1988b51e4 ext4: Add new fun... |
1211 1212 1213 1214 1215 1216 |
return 0; } /* * search the closest allocated block to the right for *logical * and returns it at @logical + it's physical address at @phys |
df3ab1707 ext4: fix the com... |
1217 |
* if *logical is the largest allocated block, the function |
1988b51e4 ext4: Add new fun... |
1218 1219 1220 |
* returns 0 at @phys * return value contains 0 (success) or error code */ |
1f109d5a1 ext4: make variou... |
1221 1222 |
static int ext4_ext_search_right(struct inode *inode, struct ext4_ext_path *path, |
4d33b1ef1 ext4: teach ext4_... |
1223 1224 |
ext4_lblk_t *logical, ext4_fsblk_t *phys, struct ext4_extent **ret_ex) |
1988b51e4 ext4: Add new fun... |
1225 1226 1227 1228 1229 1230 |
{ struct buffer_head *bh = NULL; struct ext4_extent_header *eh; struct ext4_extent_idx *ix; struct ext4_extent *ex; ext4_fsblk_t block; |
395a87bfe ext4: fix header ... |
1231 1232 |
int depth; /* Note, NOT eh_depth; depth from top of tree */ int ee_len; |
1988b51e4 ext4: Add new fun... |
1233 |
|
273df556b ext4: Convert BUG... |
1234 1235 1236 1237 |
if (unlikely(path == NULL)) { EXT4_ERROR_INODE(inode, "path == NULL *logical %d!", *logical); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 |
depth = path->p_depth; *phys = 0; if (depth == 0 && path->p_ext == NULL) return 0; /* usually extent in the path covers blocks smaller * then *logical, but it can be that extent is the * first one in the file */ ex = path[depth].p_ext; |
b939e3766 ext4: Use the ext... |
1249 |
ee_len = ext4_ext_get_actual_len(ex); |
1988b51e4 ext4: Add new fun... |
1250 |
if (*logical < le32_to_cpu(ex->ee_block)) { |
273df556b ext4: Convert BUG... |
1251 1252 1253 1254 1255 1256 |
if (unlikely(EXT_FIRST_EXTENT(path[depth].p_hdr) != ex)) { EXT4_ERROR_INODE(inode, "first_extent(path[%d].p_hdr) != ex", depth); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1257 1258 |
while (--depth >= 0) { ix = path[depth].p_idx; |
273df556b ext4: Convert BUG... |
1259 1260 1261 1262 1263 1264 |
if (unlikely(ix != EXT_FIRST_INDEX(path[depth].p_hdr))) { EXT4_ERROR_INODE(inode, "ix != EXT_FIRST_INDEX *logical %d!", *logical); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1265 |
} |
4d33b1ef1 ext4: teach ext4_... |
1266 |
goto found_extent; |
1988b51e4 ext4: Add new fun... |
1267 |
} |
273df556b ext4: Convert BUG... |
1268 1269 1270 1271 1272 1273 |
if (unlikely(*logical < (le32_to_cpu(ex->ee_block) + ee_len))) { EXT4_ERROR_INODE(inode, "logical %d < ee_block %d + ee_len %d!", *logical, le32_to_cpu(ex->ee_block), ee_len); return -EIO; } |
1988b51e4 ext4: Add new fun... |
1274 1275 1276 1277 |
if (ex != EXT_LAST_EXTENT(path[depth].p_hdr)) { /* next allocated block in this leaf */ ex++; |
4d33b1ef1 ext4: teach ext4_... |
1278 |
goto found_extent; |
1988b51e4 ext4: Add new fun... |
1279 1280 1281 1282 1283 1284 |
} /* go up and search for index to the right */ while (--depth >= 0) { ix = path[depth].p_idx; if (ix != EXT_LAST_INDEX(path[depth].p_hdr)) |
25f1ee3ab ext4: fix build w... |
1285 |
goto got_index; |
1988b51e4 ext4: Add new fun... |
1286 |
} |
25f1ee3ab ext4: fix build w... |
1287 1288 |
/* we've gone up to the root and found no index to the right */ return 0; |
1988b51e4 ext4: Add new fun... |
1289 |
|
25f1ee3ab ext4: fix build w... |
1290 |
got_index: |
1988b51e4 ext4: Add new fun... |
1291 1292 1293 1294 |
/* we've found index to the right, let's * follow it and find the closest allocated * block to the right */ ix++; |
bf89d16f6 ext4: rename {ext... |
1295 |
block = ext4_idx_pblock(ix); |
1988b51e4 ext4: Add new fun... |
1296 1297 1298 1299 1300 |
while (++depth < path->p_depth) { bh = sb_bread(inode->i_sb, block); if (bh == NULL) return -EIO; eh = ext_block_hdr(bh); |
395a87bfe ext4: fix header ... |
1301 |
/* subtract from p_depth to get proper eh_depth */ |
56b19868a ext4: Add checks ... |
1302 |
if (ext4_ext_check(inode, eh, path->p_depth - depth)) { |
1988b51e4 ext4: Add new fun... |
1303 1304 1305 1306 |
put_bh(bh); return -EIO; } ix = EXT_FIRST_INDEX(eh); |
bf89d16f6 ext4: rename {ext... |
1307 |
block = ext4_idx_pblock(ix); |
1988b51e4 ext4: Add new fun... |
1308 1309 1310 1311 1312 1313 1314 |
put_bh(bh); } bh = sb_bread(inode->i_sb, block); if (bh == NULL) return -EIO; eh = ext_block_hdr(bh); |
56b19868a ext4: Add checks ... |
1315 |
if (ext4_ext_check(inode, eh, path->p_depth - depth)) { |
1988b51e4 ext4: Add new fun... |
1316 1317 1318 1319 |
put_bh(bh); return -EIO; } ex = EXT_FIRST_EXTENT(eh); |
4d33b1ef1 ext4: teach ext4_... |
1320 |
found_extent: |
1988b51e4 ext4: Add new fun... |
1321 |
*logical = le32_to_cpu(ex->ee_block); |
bf89d16f6 ext4: rename {ext... |
1322 |
*phys = ext4_ext_pblock(ex); |
4d33b1ef1 ext4: teach ext4_... |
1323 1324 1325 |
*ret_ex = ex; if (bh) put_bh(bh); |
1988b51e4 ext4: Add new fun... |
1326 |
return 0; |
1988b51e4 ext4: Add new fun... |
1327 1328 1329 |
} /* |
d0d856e8b [PATCH] ext4: cle... |
1330 |
* ext4_ext_next_allocated_block: |
f17722f91 ext4: Fix max fil... |
1331 |
* returns allocated block in subsequent extent or EXT_MAX_BLOCKS. |
d0d856e8b [PATCH] ext4: cle... |
1332 1333 1334 |
* NOTE: it considers block number from index entry as * allocated block. Thus, index entries have to be consistent * with leaves. |
a86c61812 [PATCH] ext3: add... |
1335 |
*/ |
725d26d3f ext4: Introduce e... |
1336 |
static ext4_lblk_t |
a86c61812 [PATCH] ext3: add... |
1337 1338 1339 1340 1341 1342 1343 1344 |
ext4_ext_next_allocated_block(struct ext4_ext_path *path) { int depth; BUG_ON(path == NULL); depth = path->p_depth; if (depth == 0 && path->p_ext == NULL) |
f17722f91 ext4: Fix max fil... |
1345 |
return EXT_MAX_BLOCKS; |
a86c61812 [PATCH] ext3: add... |
1346 1347 1348 1349 |
while (depth >= 0) { if (depth == path->p_depth) { /* leaf */ |
6f8ff5372 ext4: handle NULL... |
1350 1351 |
if (path[depth].p_ext && path[depth].p_ext != |
a86c61812 [PATCH] ext3: add... |
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 |
EXT_LAST_EXTENT(path[depth].p_hdr)) return le32_to_cpu(path[depth].p_ext[1].ee_block); } else { /* index */ if (path[depth].p_idx != EXT_LAST_INDEX(path[depth].p_hdr)) return le32_to_cpu(path[depth].p_idx[1].ei_block); } depth--; } |
f17722f91 ext4: Fix max fil... |
1362 |
return EXT_MAX_BLOCKS; |
a86c61812 [PATCH] ext3: add... |
1363 1364 1365 |
} /* |
d0d856e8b [PATCH] ext4: cle... |
1366 |
* ext4_ext_next_leaf_block: |
f17722f91 ext4: Fix max fil... |
1367 |
* returns first allocated block from next leaf or EXT_MAX_BLOCKS |
a86c61812 [PATCH] ext3: add... |
1368 |
*/ |
5718789da ext4: remove unus... |
1369 |
static ext4_lblk_t ext4_ext_next_leaf_block(struct ext4_ext_path *path) |
a86c61812 [PATCH] ext3: add... |
1370 1371 1372 1373 1374 1375 1376 1377 |
{ int depth; BUG_ON(path == NULL); depth = path->p_depth; /* zero-tree has no leaf blocks at all */ if (depth == 0) |
f17722f91 ext4: Fix max fil... |
1378 |
return EXT_MAX_BLOCKS; |
a86c61812 [PATCH] ext3: add... |
1379 1380 1381 1382 1383 1384 1385 |
/* go to index block */ depth--; while (depth >= 0) { if (path[depth].p_idx != EXT_LAST_INDEX(path[depth].p_hdr)) |
725d26d3f ext4: Introduce e... |
1386 1387 |
return (ext4_lblk_t) le32_to_cpu(path[depth].p_idx[1].ei_block); |
a86c61812 [PATCH] ext3: add... |
1388 1389 |
depth--; } |
f17722f91 ext4: Fix max fil... |
1390 |
return EXT_MAX_BLOCKS; |
a86c61812 [PATCH] ext3: add... |
1391 1392 1393 |
} /* |
d0d856e8b [PATCH] ext4: cle... |
1394 1395 1396 |
* ext4_ext_correct_indexes: * if leaf gets modified and modified extent is first in the leaf, * then we have to correct all indexes above. |
a86c61812 [PATCH] ext3: add... |
1397 1398 |
* TODO: do we need to correct tree in all cases? */ |
1d03ec984 ext4: Fix sparse... |
1399 |
static int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode, |
a86c61812 [PATCH] ext3: add... |
1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 |
struct ext4_ext_path *path) { struct ext4_extent_header *eh; int depth = ext_depth(inode); struct ext4_extent *ex; __le32 border; int k, err = 0; eh = path[depth].p_hdr; ex = path[depth].p_ext; |
273df556b ext4: Convert BUG... |
1410 1411 1412 1413 1414 1415 |
if (unlikely(ex == NULL || eh == NULL)) { EXT4_ERROR_INODE(inode, "ex %p == NULL or eh %p == NULL", ex, eh); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 |
if (depth == 0) { /* there is no tree at all */ return 0; } if (ex != EXT_FIRST_EXTENT(eh)) { /* we correct tree if first leaf got modified only */ return 0; } /* |
d0d856e8b [PATCH] ext4: cle... |
1428 |
* TODO: we need correction if border is smaller than current one |
a86c61812 [PATCH] ext3: add... |
1429 1430 1431 |
*/ k = depth - 1; border = path[depth].p_ext->ee_block; |
7e0289766 [PATCH] ext4: if ... |
1432 1433 |
err = ext4_ext_get_access(handle, inode, path + k); if (err) |
a86c61812 [PATCH] ext3: add... |
1434 1435 |
return err; path[k].p_idx->ei_block = border; |
7e0289766 [PATCH] ext4: if ... |
1436 1437 |
err = ext4_ext_dirty(handle, inode, path + k); if (err) |
a86c61812 [PATCH] ext3: add... |
1438 1439 1440 1441 1442 1443 |
return err; while (k--) { /* change all left-side indexes */ if (path[k+1].p_idx != EXT_FIRST_INDEX(path[k+1].p_hdr)) break; |
7e0289766 [PATCH] ext4: if ... |
1444 1445 |
err = ext4_ext_get_access(handle, inode, path + k); if (err) |
a86c61812 [PATCH] ext3: add... |
1446 1447 |
break; path[k].p_idx->ei_block = border; |
7e0289766 [PATCH] ext4: if ... |
1448 1449 |
err = ext4_ext_dirty(handle, inode, path + k); if (err) |
a86c61812 [PATCH] ext3: add... |
1450 1451 1452 1453 1454 |
break; } return err; } |
748de6736 ext4: online defr... |
1455 |
int |
a86c61812 [PATCH] ext3: add... |
1456 1457 1458 |
ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1, struct ext4_extent *ex2) { |
749269fac Change on-disk fo... |
1459 |
unsigned short ext1_ee_len, ext2_ee_len, max_len; |
a2df2a634 fallocate support... |
1460 1461 1462 1463 1464 1465 1466 |
/* * Make sure that either both extents are uninitialized, or * both are _not_. */ if (ext4_ext_is_uninitialized(ex1) ^ ext4_ext_is_uninitialized(ex2)) return 0; |
749269fac Change on-disk fo... |
1467 1468 1469 1470 |
if (ext4_ext_is_uninitialized(ex1)) max_len = EXT_UNINIT_MAX_LEN; else max_len = EXT_INIT_MAX_LEN; |
a2df2a634 fallocate support... |
1471 1472 1473 1474 |
ext1_ee_len = ext4_ext_get_actual_len(ex1); ext2_ee_len = ext4_ext_get_actual_len(ex2); if (le32_to_cpu(ex1->ee_block) + ext1_ee_len != |
63f579335 [PATCH] ext4 whit... |
1475 |
le32_to_cpu(ex2->ee_block)) |
a86c61812 [PATCH] ext3: add... |
1476 |
return 0; |
471d4011a [PATCH] ext4: uni... |
1477 1478 1479 |
/* * To allow future support for preallocated extents to be added * as an RO_COMPAT feature, refuse to merge to extents if |
d0d856e8b [PATCH] ext4: cle... |
1480 |
* this can result in the top bit of ee_len being set. |
471d4011a [PATCH] ext4: uni... |
1481 |
*/ |
749269fac Change on-disk fo... |
1482 |
if (ext1_ee_len + ext2_ee_len > max_len) |
471d4011a [PATCH] ext4: uni... |
1483 |
return 0; |
bbf2f9fb1 Fix misspellings ... |
1484 |
#ifdef AGGRESSIVE_TEST |
b939e3766 ext4: Use the ext... |
1485 |
if (ext1_ee_len >= 4) |
a86c61812 [PATCH] ext3: add... |
1486 1487 |
return 0; #endif |
bf89d16f6 ext4: rename {ext... |
1488 |
if (ext4_ext_pblock(ex1) + ext1_ee_len == ext4_ext_pblock(ex2)) |
a86c61812 [PATCH] ext3: add... |
1489 1490 1491 1492 1493 |
return 1; return 0; } /* |
56055d3ae write support for... |
1494 1495 1496 1497 1498 1499 |
* This function tries to merge the "ex" extent to the next extent in the tree. * It always tries to merge towards right. If you want to merge towards * left, pass "ex - 1" as argument instead of "ex". * Returns 0 if the extents (ex and ex+1) were _not_ merged and returns * 1 if they got merged. */ |
197217a5a ext4: add a funct... |
1500 |
static int ext4_ext_try_to_merge_right(struct inode *inode, |
1f109d5a1 ext4: make variou... |
1501 1502 |
struct ext4_ext_path *path, struct ext4_extent *ex) |
56055d3ae write support for... |
1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 |
{ struct ext4_extent_header *eh; unsigned int depth, len; int merge_done = 0; int uninitialized = 0; depth = ext_depth(inode); BUG_ON(path[depth].p_hdr == NULL); eh = path[depth].p_hdr; while (ex < EXT_LAST_EXTENT(eh)) { if (!ext4_can_extents_be_merged(inode, ex, ex + 1)) break; /* merge with next extent! */ if (ext4_ext_is_uninitialized(ex)) uninitialized = 1; ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex) + ext4_ext_get_actual_len(ex + 1)); if (uninitialized) ext4_ext_mark_uninitialized(ex); if (ex + 1 < EXT_LAST_EXTENT(eh)) { len = (EXT_LAST_EXTENT(eh) - ex - 1) * sizeof(struct ext4_extent); memmove(ex + 1, ex + 2, len); } |
e8546d061 ext4: le*_add_cpu... |
1529 |
le16_add_cpu(&eh->eh_entries, -1); |
56055d3ae write support for... |
1530 1531 1532 |
merge_done = 1; WARN_ON(eh->eh_entries == 0); if (!eh->eh_entries) |
24676da46 ext4: Convert cal... |
1533 |
EXT4_ERROR_INODE(inode, "eh->eh_entries = 0!"); |
56055d3ae write support for... |
1534 1535 1536 1537 1538 1539 |
} return merge_done; } /* |
197217a5a ext4: add a funct... |
1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 |
* This function tries to merge the @ex extent to neighbours in the tree. * return 1 if merge left else 0. */ static int ext4_ext_try_to_merge(struct inode *inode, struct ext4_ext_path *path, struct ext4_extent *ex) { struct ext4_extent_header *eh; unsigned int depth; int merge_done = 0; int ret = 0; depth = ext_depth(inode); BUG_ON(path[depth].p_hdr == NULL); eh = path[depth].p_hdr; if (ex > EXT_FIRST_EXTENT(eh)) merge_done = ext4_ext_try_to_merge_right(inode, path, ex - 1); if (!merge_done) ret = ext4_ext_try_to_merge_right(inode, path, ex); return ret; } /* |
25d14f983 ext4: Extent over... |
1565 1566 1567 1568 1569 1570 1571 |
* check if a portion of the "newext" extent overlaps with an * existing extent. * * If there is an overlap discovered, it updates the length of the newext * such that there will be no overlap, and then returns 1. * If there is no overlap found, it returns 0. */ |
4d33b1ef1 ext4: teach ext4_... |
1572 1573 |
static unsigned int ext4_ext_check_overlap(struct ext4_sb_info *sbi, struct inode *inode, |
1f109d5a1 ext4: make variou... |
1574 1575 |
struct ext4_extent *newext, struct ext4_ext_path *path) |
25d14f983 ext4: Extent over... |
1576 |
{ |
725d26d3f ext4: Introduce e... |
1577 |
ext4_lblk_t b1, b2; |
25d14f983 ext4: Extent over... |
1578 1579 1580 1581 |
unsigned int depth, len1; unsigned int ret = 0; b1 = le32_to_cpu(newext->ee_block); |
a2df2a634 fallocate support... |
1582 |
len1 = ext4_ext_get_actual_len(newext); |
25d14f983 ext4: Extent over... |
1583 1584 1585 1586 |
depth = ext_depth(inode); if (!path[depth].p_ext) goto out; b2 = le32_to_cpu(path[depth].p_ext->ee_block); |
4d33b1ef1 ext4: teach ext4_... |
1587 |
b2 &= ~(sbi->s_cluster_ratio - 1); |
25d14f983 ext4: Extent over... |
1588 1589 1590 |
/* * get the next allocated block if the extent in the path |
2b2d6d019 ext4: Cleanup whi... |
1591 |
* is before the requested block(s) |
25d14f983 ext4: Extent over... |
1592 1593 1594 |
*/ if (b2 < b1) { b2 = ext4_ext_next_allocated_block(path); |
f17722f91 ext4: Fix max fil... |
1595 |
if (b2 == EXT_MAX_BLOCKS) |
25d14f983 ext4: Extent over... |
1596 |
goto out; |
4d33b1ef1 ext4: teach ext4_... |
1597 |
b2 &= ~(sbi->s_cluster_ratio - 1); |
25d14f983 ext4: Extent over... |
1598 |
} |
725d26d3f ext4: Introduce e... |
1599 |
/* check for wrap through zero on extent logical start block*/ |
25d14f983 ext4: Extent over... |
1600 |
if (b1 + len1 < b1) { |
f17722f91 ext4: Fix max fil... |
1601 |
len1 = EXT_MAX_BLOCKS - b1; |
25d14f983 ext4: Extent over... |
1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 |
newext->ee_len = cpu_to_le16(len1); ret = 1; } /* check for overlap */ if (b1 + len1 > b2) { newext->ee_len = cpu_to_le16(b2 - b1); ret = 1; } out: return ret; } /* |
d0d856e8b [PATCH] ext4: cle... |
1616 1617 1618 1619 |
* ext4_ext_insert_extent: * tries to merge requsted extent into the existing extent or * inserts requested extent as new one into the tree, * creating new leaf in the no-space case. |
a86c61812 [PATCH] ext3: add... |
1620 1621 1622 |
*/ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, |
0031462b5 ext4: Split unini... |
1623 |
struct ext4_extent *newext, int flag) |
a86c61812 [PATCH] ext3: add... |
1624 |
{ |
af5bc92dd ext4: Fix whitesp... |
1625 |
struct ext4_extent_header *eh; |
a86c61812 [PATCH] ext3: add... |
1626 1627 1628 |
struct ext4_extent *ex, *fex; struct ext4_extent *nearex; /* nearest extent */ struct ext4_ext_path *npath = NULL; |
725d26d3f ext4: Introduce e... |
1629 1630 |
int depth, len, err; ext4_lblk_t next; |
a2df2a634 fallocate support... |
1631 |
unsigned uninitialized = 0; |
55f020db6 ext4: add flag to... |
1632 |
int flags = 0; |
a86c61812 [PATCH] ext3: add... |
1633 |
|
273df556b ext4: Convert BUG... |
1634 1635 1636 1637 |
if (unlikely(ext4_ext_get_actual_len(newext) == 0)) { EXT4_ERROR_INODE(inode, "ext4_ext_get_actual_len(newext) == 0"); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
1638 1639 |
depth = ext_depth(inode); ex = path[depth].p_ext; |
273df556b ext4: Convert BUG... |
1640 1641 1642 1643 |
if (unlikely(path[depth].p_hdr == NULL)) { EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
1644 1645 |
/* try to insert block into found extent and return */ |
744692dc0 ext4: use ext4_ge... |
1646 |
if (ex && !(flag & EXT4_GET_BLOCKS_PRE_IO) |
0031462b5 ext4: Split unini... |
1647 |
&& ext4_can_extents_be_merged(inode, ex, newext)) { |
32de67569 ext4: fix a synta... |
1648 1649 |
ext_debug("append [%d]%d block to %u:[%d]%d (from %llu) ", |
bf89d16f6 ext4: rename {ext... |
1650 1651 1652 1653 1654 1655 |
ext4_ext_is_uninitialized(newext), ext4_ext_get_actual_len(newext), le32_to_cpu(ex->ee_block), ext4_ext_is_uninitialized(ex), ext4_ext_get_actual_len(ex), ext4_ext_pblock(ex)); |
7e0289766 [PATCH] ext4: if ... |
1656 1657 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) |
a86c61812 [PATCH] ext3: add... |
1658 |
return err; |
a2df2a634 fallocate support... |
1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 |
/* * ext4_can_extents_be_merged should have checked that either * both extents are uninitialized, or both aren't. Thus we * need to check only one of them here. */ if (ext4_ext_is_uninitialized(ex)) uninitialized = 1; ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex) + ext4_ext_get_actual_len(newext)); if (uninitialized) ext4_ext_mark_uninitialized(ex); |
a86c61812 [PATCH] ext3: add... |
1671 1672 1673 1674 |
eh = path[depth].p_hdr; nearex = ex; goto merge; } |
a86c61812 [PATCH] ext3: add... |
1675 1676 1677 1678 1679 1680 1681 |
depth = ext_depth(inode); eh = path[depth].p_hdr; if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max)) goto has_space; /* probably next leaf has space for us? */ fex = EXT_LAST_EXTENT(eh); |
598dbdf24 ext4: avoid unnee... |
1682 1683 |
next = EXT_MAX_BLOCKS; if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block)) |
5718789da ext4: remove unus... |
1684 |
next = ext4_ext_next_leaf_block(path); |
598dbdf24 ext4: avoid unnee... |
1685 |
if (next != EXT_MAX_BLOCKS) { |
32de67569 ext4: fix a synta... |
1686 1687 |
ext_debug("next leaf block - %u ", next); |
a86c61812 [PATCH] ext3: add... |
1688 1689 1690 1691 1692 1693 1694 |
BUG_ON(npath != NULL); npath = ext4_ext_find_extent(inode, next, NULL); if (IS_ERR(npath)) return PTR_ERR(npath); BUG_ON(npath->p_depth != path->p_depth); eh = npath[depth].p_hdr; if (le16_to_cpu(eh->eh_entries) < le16_to_cpu(eh->eh_max)) { |
25985edce Fix common misspe... |
1695 1696 |
ext_debug("next leaf isn't full(%d) ", |
a86c61812 [PATCH] ext3: add... |
1697 1698 |
le16_to_cpu(eh->eh_entries)); path = npath; |
ffb505ff0 ext4: remove redu... |
1699 |
goto has_space; |
a86c61812 [PATCH] ext3: add... |
1700 1701 1702 1703 1704 1705 1706 |
} ext_debug("next leaf has no free space(%d,%d) ", le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max)); } /* |
d0d856e8b [PATCH] ext4: cle... |
1707 1708 |
* There is no free space in the found leaf. * We're gonna add a new leaf in the tree. |
a86c61812 [PATCH] ext3: add... |
1709 |
*/ |
55f020db6 ext4: add flag to... |
1710 1711 1712 |
if (flag & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) flags = EXT4_MB_USE_ROOT_BLOCKS; err = ext4_ext_create_new_leaf(handle, inode, flags, path, newext); |
a86c61812 [PATCH] ext3: add... |
1713 1714 1715 1716 1717 1718 1719 |
if (err) goto cleanup; depth = ext_depth(inode); eh = path[depth].p_hdr; has_space: nearex = path[depth].p_ext; |
7e0289766 [PATCH] ext4: if ... |
1720 1721 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) |
a86c61812 [PATCH] ext3: add... |
1722 1723 1724 1725 |
goto cleanup; if (!nearex) { /* there is no extent in this leaf, create first one */ |
32de67569 ext4: fix a synta... |
1726 1727 |
ext_debug("first extent in the leaf: %u:%llu:[%d]%d ", |
8c55e2041 EXT4: Fix whitespace |
1728 |
le32_to_cpu(newext->ee_block), |
bf89d16f6 ext4: rename {ext... |
1729 |
ext4_ext_pblock(newext), |
553f90089 ext4: Show unwrit... |
1730 |
ext4_ext_is_uninitialized(newext), |
a2df2a634 fallocate support... |
1731 |
ext4_ext_get_actual_len(newext)); |
80e675f90 ext4: optimize me... |
1732 1733 1734 |
nearex = EXT_FIRST_EXTENT(eh); } else { if (le32_to_cpu(newext->ee_block) |
8c55e2041 EXT4: Fix whitespace |
1735 |
> le32_to_cpu(nearex->ee_block)) { |
80e675f90 ext4: optimize me... |
1736 |
/* Insert after */ |
32de67569 ext4: fix a synta... |
1737 1738 1739 |
ext_debug("insert %u:%llu:[%d]%d before: " "nearest %p ", |
80e675f90 ext4: optimize me... |
1740 1741 1742 1743 1744 1745 1746 1747 1748 |
le32_to_cpu(newext->ee_block), ext4_ext_pblock(newext), ext4_ext_is_uninitialized(newext), ext4_ext_get_actual_len(newext), nearex); nearex++; } else { /* Insert before */ BUG_ON(newext->ee_block == nearex->ee_block); |
32de67569 ext4: fix a synta... |
1749 1750 1751 |
ext_debug("insert %u:%llu:[%d]%d after: " "nearest %p ", |
8c55e2041 EXT4: Fix whitespace |
1752 |
le32_to_cpu(newext->ee_block), |
bf89d16f6 ext4: rename {ext... |
1753 |
ext4_ext_pblock(newext), |
553f90089 ext4: Show unwrit... |
1754 |
ext4_ext_is_uninitialized(newext), |
a2df2a634 fallocate support... |
1755 |
ext4_ext_get_actual_len(newext), |
80e675f90 ext4: optimize me... |
1756 1757 1758 1759 |
nearex); } len = EXT_LAST_EXTENT(eh) - nearex + 1; if (len > 0) { |
32de67569 ext4: fix a synta... |
1760 |
ext_debug("insert %u:%llu:[%d]%d: " |
80e675f90 ext4: optimize me... |
1761 1762 1763 1764 1765 1766 1767 1768 1769 |
"move %d extents from 0x%p to 0x%p ", le32_to_cpu(newext->ee_block), ext4_ext_pblock(newext), ext4_ext_is_uninitialized(newext), ext4_ext_get_actual_len(newext), len, nearex, nearex + 1); memmove(nearex + 1, nearex, len * sizeof(struct ext4_extent)); |
a86c61812 [PATCH] ext3: add... |
1770 |
} |
a86c61812 [PATCH] ext3: add... |
1771 |
} |
e8546d061 ext4: le*_add_cpu... |
1772 |
le16_add_cpu(&eh->eh_entries, 1); |
80e675f90 ext4: optimize me... |
1773 |
path[depth].p_ext = nearex; |
a86c61812 [PATCH] ext3: add... |
1774 |
nearex->ee_block = newext->ee_block; |
bf89d16f6 ext4: rename {ext... |
1775 |
ext4_ext_store_pblock(nearex, ext4_ext_pblock(newext)); |
a86c61812 [PATCH] ext3: add... |
1776 |
nearex->ee_len = newext->ee_len; |
a86c61812 [PATCH] ext3: add... |
1777 1778 1779 |
merge: /* try to merge extents to the right */ |
744692dc0 ext4: use ext4_ge... |
1780 |
if (!(flag & EXT4_GET_BLOCKS_PRE_IO)) |
0031462b5 ext4: Split unini... |
1781 |
ext4_ext_try_to_merge(inode, path, nearex); |
a86c61812 [PATCH] ext3: add... |
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 |
/* try to merge extents to the left */ /* time to correct all indexes above */ err = ext4_ext_correct_indexes(handle, inode, path); if (err) goto cleanup; err = ext4_ext_dirty(handle, inode, path + depth); cleanup: if (npath) { ext4_ext_drop_refs(npath); kfree(npath); } |
a86c61812 [PATCH] ext3: add... |
1797 1798 1799 |
ext4_ext_invalidate_cache(inode); return err; } |
1f109d5a1 ext4: make variou... |
1800 1801 1802 |
static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, ext4_lblk_t num, ext_prepare_callback func, void *cbdata) |
6873fa0de Hook ext4 to the ... |
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 |
{ struct ext4_ext_path *path = NULL; struct ext4_ext_cache cbex; struct ext4_extent *ex; ext4_lblk_t next, start = 0, end = 0; ext4_lblk_t last = block + num; int depth, exists, err = 0; BUG_ON(func == NULL); BUG_ON(inode == NULL); |
f17722f91 ext4: Fix max fil... |
1813 |
while (block < last && block != EXT_MAX_BLOCKS) { |
6873fa0de Hook ext4 to the ... |
1814 1815 |
num = last - block; /* find extent for this block */ |
fab3a549e ext4: Fix potenti... |
1816 |
down_read(&EXT4_I(inode)->i_data_sem); |
6873fa0de Hook ext4 to the ... |
1817 |
path = ext4_ext_find_extent(inode, block, path); |
fab3a549e ext4: Fix potenti... |
1818 |
up_read(&EXT4_I(inode)->i_data_sem); |
6873fa0de Hook ext4 to the ... |
1819 1820 1821 1822 1823 1824 1825 |
if (IS_ERR(path)) { err = PTR_ERR(path); path = NULL; break; } depth = ext_depth(inode); |
273df556b ext4: Convert BUG... |
1826 1827 1828 1829 1830 |
if (unlikely(path[depth].p_hdr == NULL)) { EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth); err = -EIO; break; } |
6873fa0de Hook ext4 to the ... |
1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 |
ex = path[depth].p_ext; next = ext4_ext_next_allocated_block(path); exists = 0; if (!ex) { /* there is no extent yet, so try to allocate * all requested space */ start = block; end = block + num; } else if (le32_to_cpu(ex->ee_block) > block) { /* need to allocate space before found extent */ start = block; end = le32_to_cpu(ex->ee_block); if (block + num < end) end = block + num; } else if (block >= le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex)) { /* need to allocate space after found extent */ start = block; end = block + num; if (end >= next) end = next; } else if (block >= le32_to_cpu(ex->ee_block)) { /* * some part of requested space is covered * by found extent */ start = block; end = le32_to_cpu(ex->ee_block) + ext4_ext_get_actual_len(ex); if (block + num < end) end = block + num; exists = 1; } else { BUG(); } BUG_ON(end <= start); if (!exists) { cbex.ec_block = start; cbex.ec_len = end - start; cbex.ec_start = 0; |
6873fa0de Hook ext4 to the ... |
1873 1874 1875 |
} else { cbex.ec_block = le32_to_cpu(ex->ee_block); cbex.ec_len = ext4_ext_get_actual_len(ex); |
bf89d16f6 ext4: rename {ext... |
1876 |
cbex.ec_start = ext4_ext_pblock(ex); |
6873fa0de Hook ext4 to the ... |
1877 |
} |
273df556b ext4: Convert BUG... |
1878 1879 1880 1881 1882 |
if (unlikely(cbex.ec_len == 0)) { EXT4_ERROR_INODE(inode, "cbex.ec_len == 0"); err = -EIO; break; } |
c03f8aa9a ext4: use FIEMAP_... |
1883 |
err = func(inode, next, &cbex, ex, cbdata); |
6873fa0de Hook ext4 to the ... |
1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 |
ext4_ext_drop_refs(path); if (err < 0) break; if (err == EXT_REPEAT) continue; else if (err == EXT_BREAK) { err = 0; break; } if (ext_depth(inode) != depth) { /* depth was changed. we have to realloc path */ kfree(path); path = NULL; } block = cbex.ec_block + cbex.ec_len; } if (path) { ext4_ext_drop_refs(path); kfree(path); } return err; } |
09b882520 [PATCH] ext4: Eli... |
1912 |
static void |
725d26d3f ext4: Introduce e... |
1913 |
ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block, |
b05e6ae58 ext4: drop ec_typ... |
1914 |
__u32 len, ext4_fsblk_t start) |
a86c61812 [PATCH] ext3: add... |
1915 1916 1917 |
{ struct ext4_ext_cache *cex; BUG_ON(len == 0); |
2ec0ae3ac ext4: Fix race in... |
1918 |
spin_lock(&EXT4_I(inode)->i_block_reservation_lock); |
d8990240d ext4: add some tr... |
1919 |
trace_ext4_ext_put_in_cache(inode, block, len, start); |
a86c61812 [PATCH] ext3: add... |
1920 |
cex = &EXT4_I(inode)->i_cached_extent; |
a86c61812 [PATCH] ext3: add... |
1921 1922 1923 |
cex->ec_block = block; cex->ec_len = len; cex->ec_start = start; |
2ec0ae3ac ext4: Fix race in... |
1924 |
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); |
a86c61812 [PATCH] ext3: add... |
1925 1926 1927 |
} /* |
d0d856e8b [PATCH] ext4: cle... |
1928 1929 |
* ext4_ext_put_gap_in_cache: * calculate boundaries of the gap that the requested block fits into |
a86c61812 [PATCH] ext3: add... |
1930 1931 |
* and cache this gap */ |
09b882520 [PATCH] ext4: Eli... |
1932 |
static void |
a86c61812 [PATCH] ext3: add... |
1933 |
ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, |
725d26d3f ext4: Introduce e... |
1934 |
ext4_lblk_t block) |
a86c61812 [PATCH] ext3: add... |
1935 1936 |
{ int depth = ext_depth(inode); |
725d26d3f ext4: Introduce e... |
1937 1938 |
unsigned long len; ext4_lblk_t lblock; |
a86c61812 [PATCH] ext3: add... |
1939 1940 1941 1942 1943 1944 |
struct ext4_extent *ex; ex = path[depth].p_ext; if (ex == NULL) { /* there is no extent yet, so gap is [0;-] */ lblock = 0; |
f17722f91 ext4: Fix max fil... |
1945 |
len = EXT_MAX_BLOCKS; |
a86c61812 [PATCH] ext3: add... |
1946 1947 1948 1949 |
ext_debug("cache gap(whole file):"); } else if (block < le32_to_cpu(ex->ee_block)) { lblock = block; len = le32_to_cpu(ex->ee_block) - block; |
bba907433 ext4 extents: rem... |
1950 1951 1952 1953 |
ext_debug("cache gap(before): %u [%u:%u]", block, le32_to_cpu(ex->ee_block), ext4_ext_get_actual_len(ex)); |
a86c61812 [PATCH] ext3: add... |
1954 |
} else if (block >= le32_to_cpu(ex->ee_block) |
a2df2a634 fallocate support... |
1955 |
+ ext4_ext_get_actual_len(ex)) { |
725d26d3f ext4: Introduce e... |
1956 |
ext4_lblk_t next; |
8c55e2041 EXT4: Fix whitespace |
1957 |
lblock = le32_to_cpu(ex->ee_block) |
a2df2a634 fallocate support... |
1958 |
+ ext4_ext_get_actual_len(ex); |
725d26d3f ext4: Introduce e... |
1959 1960 |
next = ext4_ext_next_allocated_block(path); |
bba907433 ext4 extents: rem... |
1961 1962 1963 1964 |
ext_debug("cache gap(after): [%u:%u] %u", le32_to_cpu(ex->ee_block), ext4_ext_get_actual_len(ex), block); |
725d26d3f ext4: Introduce e... |
1965 1966 |
BUG_ON(next == lblock); len = next - lblock; |
a86c61812 [PATCH] ext3: add... |
1967 1968 1969 1970 |
} else { lblock = len = 0; BUG(); } |
bba907433 ext4 extents: rem... |
1971 1972 |
ext_debug(" -> %u:%lu ", lblock, len); |
b05e6ae58 ext4: drop ec_typ... |
1973 |
ext4_ext_put_in_cache(inode, lblock, len, 0); |
a86c61812 [PATCH] ext3: add... |
1974 |
} |
b05e6ae58 ext4: drop ec_typ... |
1975 |
/* |
b7ca1e8ec ext4: correct com... |
1976 |
* ext4_ext_check_cache() |
a4bb6b64e ext4: enable "pun... |
1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 |
* Checks to see if the given block is in the cache. * If it is, the cached extent is stored in the given * cache extent pointer. If the cached extent is a hole, * this routine should be used instead of * ext4_ext_in_cache if the calling function needs to * know the size of the hole. * * @inode: The files inode * @block: The block to look for in the cache * @ex: Pointer where the cached extent will be stored * if it contains block * |
b05e6ae58 ext4: drop ec_typ... |
1989 1990 |
* Return 0 if cache is invalid; 1 if the cache is valid */ |
a4bb6b64e ext4: enable "pun... |
1991 1992 |
static int ext4_ext_check_cache(struct inode *inode, ext4_lblk_t block, struct ext4_ext_cache *ex){ |
a86c61812 [PATCH] ext3: add... |
1993 |
struct ext4_ext_cache *cex; |
77f4135f2 ext4: count hits/... |
1994 |
struct ext4_sb_info *sbi; |
b05e6ae58 ext4: drop ec_typ... |
1995 |
int ret = 0; |
a86c61812 [PATCH] ext3: add... |
1996 |
|
60e6679e2 ext4: Drop whites... |
1997 |
/* |
2ec0ae3ac ext4: Fix race in... |
1998 1999 2000 |
* We borrow i_block_reservation_lock to protect i_cached_extent */ spin_lock(&EXT4_I(inode)->i_block_reservation_lock); |
a86c61812 [PATCH] ext3: add... |
2001 |
cex = &EXT4_I(inode)->i_cached_extent; |
77f4135f2 ext4: count hits/... |
2002 |
sbi = EXT4_SB(inode->i_sb); |
a86c61812 [PATCH] ext3: add... |
2003 2004 |
/* has cache valid data? */ |
b05e6ae58 ext4: drop ec_typ... |
2005 |
if (cex->ec_len == 0) |
2ec0ae3ac ext4: Fix race in... |
2006 |
goto errout; |
a86c61812 [PATCH] ext3: add... |
2007 |
|
731eb1a03 ext4: consolidate... |
2008 |
if (in_range(block, cex->ec_block, cex->ec_len)) { |
a4bb6b64e ext4: enable "pun... |
2009 |
memcpy(ex, cex, sizeof(struct ext4_ext_cache)); |
bba907433 ext4 extents: rem... |
2010 2011 2012 2013 |
ext_debug("%u cached by %u:%u:%llu ", block, cex->ec_block, cex->ec_len, cex->ec_start); |
b05e6ae58 ext4: drop ec_typ... |
2014 |
ret = 1; |
a86c61812 [PATCH] ext3: add... |
2015 |
} |
2ec0ae3ac ext4: Fix race in... |
2016 |
errout: |
77f4135f2 ext4: count hits/... |
2017 2018 2019 2020 |
if (!ret) sbi->extent_cache_misses++; else sbi->extent_cache_hits++; |
d8990240d ext4: add some tr... |
2021 |
trace_ext4_ext_in_cache(inode, block, ret); |
2ec0ae3ac ext4: Fix race in... |
2022 2023 |
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); return ret; |
a86c61812 [PATCH] ext3: add... |
2024 2025 2026 |
} /* |
a4bb6b64e ext4: enable "pun... |
2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 |
* ext4_ext_in_cache() * Checks to see if the given block is in the cache. * If it is, the cached extent is stored in the given * extent pointer. * * @inode: The files inode * @block: The block to look for in the cache * @ex: Pointer where the cached extent will be stored * if it contains block * * Return 0 if cache is invalid; 1 if the cache is valid */ static int ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, struct ext4_extent *ex) { struct ext4_ext_cache cex; int ret = 0; if (ext4_ext_check_cache(inode, block, &cex)) { ex->ee_block = cpu_to_le32(cex.ec_block); ext4_ext_store_pblock(ex, cex.ec_start); ex->ee_len = cpu_to_le16(cex.ec_len); ret = 1; } return ret; } /* |
d0d856e8b [PATCH] ext4: cle... |
2058 2059 |
* ext4_ext_rm_idx: * removes index from the index block. |
a86c61812 [PATCH] ext3: add... |
2060 |
*/ |
1d03ec984 ext4: Fix sparse... |
2061 |
static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode, |
a86c61812 [PATCH] ext3: add... |
2062 2063 |
struct ext4_ext_path *path) { |
a86c61812 [PATCH] ext3: add... |
2064 |
int err; |
f65e6fba1 [PATCH] ext4: 48b... |
2065 |
ext4_fsblk_t leaf; |
a86c61812 [PATCH] ext3: add... |
2066 2067 2068 |
/* free index block */ path--; |
bf89d16f6 ext4: rename {ext... |
2069 |
leaf = ext4_idx_pblock(path->p_idx); |
273df556b ext4: Convert BUG... |
2070 2071 2072 2073 |
if (unlikely(path->p_hdr->eh_entries == 0)) { EXT4_ERROR_INODE(inode, "path->p_hdr->eh_entries == 0"); return -EIO; } |
7e0289766 [PATCH] ext4: if ... |
2074 2075 |
err = ext4_ext_get_access(handle, inode, path); if (err) |
a86c61812 [PATCH] ext3: add... |
2076 |
return err; |
0e1147b00 ext4: add action ... |
2077 2078 2079 2080 2081 2082 |
if (path->p_idx != EXT_LAST_INDEX(path->p_hdr)) { int len = EXT_LAST_INDEX(path->p_hdr) - path->p_idx; len *= sizeof(struct ext4_extent_idx); memmove(path->p_idx, path->p_idx + 1, len); } |
e8546d061 ext4: le*_add_cpu... |
2083 |
le16_add_cpu(&path->p_hdr->eh_entries, -1); |
7e0289766 [PATCH] ext4: if ... |
2084 2085 |
err = ext4_ext_dirty(handle, inode, path); if (err) |
a86c61812 [PATCH] ext3: add... |
2086 |
return err; |
2ae021076 [PATCH] ext4: blk... |
2087 2088 |
ext_debug("index is empty, remove it, free block %llu ", leaf); |
d8990240d ext4: add some tr... |
2089 |
trace_ext4_ext_rm_idx(inode, leaf); |
7dc576158 ext4: Fix sparse ... |
2090 |
ext4_free_blocks(handle, inode, NULL, leaf, 1, |
e6362609b ext4: call ext4_f... |
2091 |
EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET); |
a86c61812 [PATCH] ext3: add... |
2092 2093 2094 2095 |
return err; } /* |
ee12b6306 ext4: journal cre... |
2096 2097 2098 2099 2100 |
* ext4_ext_calc_credits_for_single_extent: * This routine returns max. credits that needed to insert an extent * to the extent tree. * When pass the actual path, the caller should calculate credits * under i_data_sem. |
a86c61812 [PATCH] ext3: add... |
2101 |
*/ |
525f4ed8d ext4: journal cre... |
2102 |
int ext4_ext_calc_credits_for_single_extent(struct inode *inode, int nrblocks, |
a86c61812 [PATCH] ext3: add... |
2103 2104 |
struct ext4_ext_path *path) { |
a86c61812 [PATCH] ext3: add... |
2105 |
if (path) { |
ee12b6306 ext4: journal cre... |
2106 |
int depth = ext_depth(inode); |
f3bd1f3fa ext4: journal cre... |
2107 |
int ret = 0; |
ee12b6306 ext4: journal cre... |
2108 |
|
a86c61812 [PATCH] ext3: add... |
2109 |
/* probably there is space in leaf? */ |
a86c61812 [PATCH] ext3: add... |
2110 |
if (le16_to_cpu(path[depth].p_hdr->eh_entries) |
ee12b6306 ext4: journal cre... |
2111 |
< le16_to_cpu(path[depth].p_hdr->eh_max)) { |
a86c61812 [PATCH] ext3: add... |
2112 |
|
ee12b6306 ext4: journal cre... |
2113 2114 2115 2116 2117 |
/* * There are some space in the leaf tree, no * need to account for leaf block credit * * bitmaps and block group descriptor blocks |
df3ab1707 ext4: fix the com... |
2118 |
* and other metadata blocks still need to be |
ee12b6306 ext4: journal cre... |
2119 2120 |
* accounted. */ |
525f4ed8d ext4: journal cre... |
2121 |
/* 1 bitmap, 1 block group descriptor */ |
ee12b6306 ext4: journal cre... |
2122 |
ret = 2 + EXT4_META_TRANS_BLOCKS(inode->i_sb); |
5887e98b6 ext4: Calculate r... |
2123 |
return ret; |
ee12b6306 ext4: journal cre... |
2124 2125 |
} } |
a86c61812 [PATCH] ext3: add... |
2126 |
|
525f4ed8d ext4: journal cre... |
2127 |
return ext4_chunk_trans_blocks(inode, nrblocks); |
ee12b6306 ext4: journal cre... |
2128 |
} |
a86c61812 [PATCH] ext3: add... |
2129 |
|
ee12b6306 ext4: journal cre... |
2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 |
/* * How many index/leaf blocks need to change/allocate to modify nrblocks? * * if nrblocks are fit in a single extent (chunk flag is 1), then * in the worse case, each tree level index/leaf need to be changed * if the tree split due to insert a new extent, then the old tree * index/leaf need to be updated too * * If the nrblocks are discontiguous, they could cause * the whole tree split more than once, but this is really rare. */ |
525f4ed8d ext4: journal cre... |
2141 |
int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk) |
ee12b6306 ext4: journal cre... |
2142 2143 2144 |
{ int index; int depth = ext_depth(inode); |
a86c61812 [PATCH] ext3: add... |
2145 |
|
ee12b6306 ext4: journal cre... |
2146 2147 2148 2149 |
if (chunk) index = depth * 2; else index = depth * 3; |
a86c61812 [PATCH] ext3: add... |
2150 |
|
ee12b6306 ext4: journal cre... |
2151 |
return index; |
a86c61812 [PATCH] ext3: add... |
2152 2153 2154 |
} static int ext4_remove_blocks(handle_t *handle, struct inode *inode, |
0aa060000 ext4: teach ext4_... |
2155 2156 2157 |
struct ext4_extent *ex, ext4_fsblk_t *partial_cluster, ext4_lblk_t from, ext4_lblk_t to) |
a86c61812 [PATCH] ext3: add... |
2158 |
{ |
0aa060000 ext4: teach ext4_... |
2159 |
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
a2df2a634 fallocate support... |
2160 |
unsigned short ee_len = ext4_ext_get_actual_len(ex); |
0aa060000 ext4: teach ext4_... |
2161 |
ext4_fsblk_t pblk; |
e6362609b ext4: call ext4_f... |
2162 |
int flags = EXT4_FREE_BLOCKS_FORGET; |
a86c61812 [PATCH] ext3: add... |
2163 |
|
c9de560de ext4: Add multi b... |
2164 |
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) |
e6362609b ext4: call ext4_f... |
2165 |
flags |= EXT4_FREE_BLOCKS_METADATA; |
0aa060000 ext4: teach ext4_... |
2166 2167 2168 2169 2170 2171 2172 2173 |
/* * For bigalloc file systems, we never free a partial cluster * at the beginning of the extent. Instead, we make a note * that we tried freeing the cluster, and check to see if we * need to free it on a subsequent call to ext4_remove_blocks, * or at the end of the ext4_truncate() operation. */ flags |= EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER; |
d8990240d ext4: add some tr... |
2174 |
trace_ext4_remove_blocks(inode, ex, from, to, *partial_cluster); |
0aa060000 ext4: teach ext4_... |
2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 |
/* * If we have a partial cluster, and it's different from the * cluster of the last block, we need to explicitly free the * partial cluster here. */ pblk = ext4_ext_pblock(ex) + ee_len - 1; if (*partial_cluster && (EXT4_B2C(sbi, pblk) != *partial_cluster)) { ext4_free_blocks(handle, inode, NULL, EXT4_C2B(sbi, *partial_cluster), sbi->s_cluster_ratio, flags); *partial_cluster = 0; } |
a86c61812 [PATCH] ext3: add... |
2187 2188 2189 |
#ifdef EXTENTS_STATS { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
a86c61812 [PATCH] ext3: add... |
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 |
spin_lock(&sbi->s_ext_stats_lock); sbi->s_ext_blocks += ee_len; sbi->s_ext_extents++; if (ee_len < sbi->s_ext_min) sbi->s_ext_min = ee_len; if (ee_len > sbi->s_ext_max) sbi->s_ext_max = ee_len; if (ext_depth(inode) > sbi->s_depth_max) sbi->s_depth_max = ext_depth(inode); spin_unlock(&sbi->s_ext_stats_lock); } #endif if (from >= le32_to_cpu(ex->ee_block) |
a2df2a634 fallocate support... |
2203 |
&& to == le32_to_cpu(ex->ee_block) + ee_len - 1) { |
a86c61812 [PATCH] ext3: add... |
2204 |
/* tail removal */ |
725d26d3f ext4: Introduce e... |
2205 |
ext4_lblk_t num; |
725d26d3f ext4: Introduce e... |
2206 |
|
a2df2a634 fallocate support... |
2207 |
num = le32_to_cpu(ex->ee_block) + ee_len - from; |
0aa060000 ext4: teach ext4_... |
2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 |
pblk = ext4_ext_pblock(ex) + ee_len - num; ext_debug("free last %u blocks starting %llu ", num, pblk); ext4_free_blocks(handle, inode, NULL, pblk, num, flags); /* * If the block range to be freed didn't start at the * beginning of a cluster, and we removed the entire * extent, save the partial cluster here, since we * might need to delete if we determine that the * truncate operation has removed all of the blocks in * the cluster. */ if (pblk & (sbi->s_cluster_ratio - 1) && (ee_len == num)) *partial_cluster = EXT4_B2C(sbi, pblk); else *partial_cluster = 0; |
a86c61812 [PATCH] ext3: add... |
2225 |
} else if (from == le32_to_cpu(ex->ee_block) |
a2df2a634 fallocate support... |
2226 |
&& to <= le32_to_cpu(ex->ee_block) + ee_len - 1) { |
d583fb87a ext4: punch out e... |
2227 2228 2229 2230 2231 2232 2233 2234 2235 |
/* head removal */ ext4_lblk_t num; ext4_fsblk_t start; num = to - from; start = ext4_ext_pblock(ex); ext_debug("free first %u blocks starting %llu ", num, start); |
ee90d57e2 ext4: quiet spars... |
2236 |
ext4_free_blocks(handle, inode, NULL, start, num, flags); |
d583fb87a ext4: punch out e... |
2237 |
|
a86c61812 [PATCH] ext3: add... |
2238 |
} else { |
725d26d3f ext4: Introduce e... |
2239 2240 2241 2242 |
printk(KERN_INFO "strange request: removal(2) " "%u-%u from %u:%u ", from, to, le32_to_cpu(ex->ee_block), ee_len); |
a86c61812 [PATCH] ext3: add... |
2243 2244 2245 |
} return 0; } |
d583fb87a ext4: punch out e... |
2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 |
/* * ext4_ext_rm_leaf() Removes the extents associated with the * blocks appearing between "start" and "end", and splits the extents * if "start" and "end" appear in the same extent * * @handle: The journal handle * @inode: The files inode * @path: The path to the leaf * @start: The first block to remove * @end: The last block to remove */ |
a86c61812 [PATCH] ext3: add... |
2258 2259 |
static int ext4_ext_rm_leaf(handle_t *handle, struct inode *inode, |
0aa060000 ext4: teach ext4_... |
2260 2261 |
struct ext4_ext_path *path, ext4_fsblk_t *partial_cluster, ext4_lblk_t start, ext4_lblk_t end) |
a86c61812 [PATCH] ext3: add... |
2262 |
{ |
0aa060000 ext4: teach ext4_... |
2263 |
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
a86c61812 [PATCH] ext3: add... |
2264 2265 2266 |
int err = 0, correct_index = 0; int depth = ext_depth(inode), credits; struct ext4_extent_header *eh; |
750c9c47a ext4: remove mess... |
2267 |
ext4_lblk_t a, b; |
725d26d3f ext4: Introduce e... |
2268 2269 |
unsigned num; ext4_lblk_t ex_ee_block; |
a86c61812 [PATCH] ext3: add... |
2270 |
unsigned short ex_ee_len; |
a2df2a634 fallocate support... |
2271 |
unsigned uninitialized = 0; |
a86c61812 [PATCH] ext3: add... |
2272 |
struct ext4_extent *ex; |
c29c0ae7f ext4: Make extent... |
2273 |
/* the header must be checked already in ext4_ext_remove_space() */ |
725d26d3f ext4: Introduce e... |
2274 2275 |
ext_debug("truncate since %u in leaf ", start); |
a86c61812 [PATCH] ext3: add... |
2276 2277 2278 |
if (!path[depth].p_hdr) path[depth].p_hdr = ext_block_hdr(path[depth].p_bh); eh = path[depth].p_hdr; |
273df556b ext4: Convert BUG... |
2279 2280 2281 2282 |
if (unlikely(path[depth].p_hdr == NULL)) { EXT4_ERROR_INODE(inode, "path[%d].p_hdr == NULL", depth); return -EIO; } |
a86c61812 [PATCH] ext3: add... |
2283 2284 2285 2286 |
/* find where to start removing */ ex = EXT_LAST_EXTENT(eh); ex_ee_block = le32_to_cpu(ex->ee_block); |
a2df2a634 fallocate support... |
2287 |
ex_ee_len = ext4_ext_get_actual_len(ex); |
a86c61812 [PATCH] ext3: add... |
2288 |
|
d8990240d ext4: add some tr... |
2289 |
trace_ext4_ext_rm_leaf(inode, start, ex, *partial_cluster); |
a86c61812 [PATCH] ext3: add... |
2290 2291 |
while (ex >= EXT_FIRST_EXTENT(eh) && ex_ee_block + ex_ee_len > start) { |
a41f20716 ext4: Avoid corru... |
2292 2293 2294 2295 2296 |
if (ext4_ext_is_uninitialized(ex)) uninitialized = 1; else uninitialized = 0; |
553f90089 ext4: Show unwrit... |
2297 2298 2299 |
ext_debug("remove ext %u:[%d]%d ", ex_ee_block, uninitialized, ex_ee_len); |
a86c61812 [PATCH] ext3: add... |
2300 2301 2302 |
path[depth].p_ext = ex; a = ex_ee_block > start ? ex_ee_block : start; |
d583fb87a ext4: punch out e... |
2303 2304 |
b = ex_ee_block+ex_ee_len - 1 < end ? ex_ee_block+ex_ee_len - 1 : end; |
a86c61812 [PATCH] ext3: add... |
2305 2306 2307 |
ext_debug(" border %u:%u ", a, b); |
d583fb87a ext4: punch out e... |
2308 2309 2310 2311 2312 2313 |
/* If this extent is beyond the end of the hole, skip it */ if (end <= ex_ee_block) { ex--; ex_ee_block = le32_to_cpu(ex->ee_block); ex_ee_len = ext4_ext_get_actual_len(ex); continue; |
750c9c47a ext4: remove mess... |
2314 2315 2316 2317 2318 2319 |
} else if (b != ex_ee_block + ex_ee_len - 1) { EXT4_ERROR_INODE(inode," bad truncate %u:%u ", start, end); err = -EIO; goto out; |
a86c61812 [PATCH] ext3: add... |
2320 2321 |
} else if (a != ex_ee_block) { /* remove tail of the extent */ |
750c9c47a ext4: remove mess... |
2322 |
num = a - ex_ee_block; |
a86c61812 [PATCH] ext3: add... |
2323 2324 |
} else { /* remove whole extent: excellent! */ |
a86c61812 [PATCH] ext3: add... |
2325 |
num = 0; |
a86c61812 [PATCH] ext3: add... |
2326 |
} |
34071da71 ext4: don't assum... |
2327 2328 2329 2330 2331 2332 2333 |
/* * 3 for leaf, sb, and inode plus 2 (bmap and group * descriptor) for each block group; assume two block * groups plus ex_ee_len/blocks_per_block_group for * the worst case */ credits = 7 + 2*(ex_ee_len/EXT4_BLOCKS_PER_GROUP(inode->i_sb)); |
a86c61812 [PATCH] ext3: add... |
2334 2335 2336 2337 |
if (ex == EXT_FIRST_EXTENT(eh)) { correct_index = 1; credits += (ext_depth(inode)) + 1; } |
5aca07eb7 ext4: quota macro... |
2338 |
credits += EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb); |
a86c61812 [PATCH] ext3: add... |
2339 |
|
487caeef9 ext4: Fix possibl... |
2340 |
err = ext4_ext_truncate_extend_restart(handle, inode, credits); |
9102e4fa8 ext4: Fix ext4_ex... |
2341 |
if (err) |
a86c61812 [PATCH] ext3: add... |
2342 |
goto out; |
a86c61812 [PATCH] ext3: add... |
2343 2344 2345 2346 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) goto out; |
0aa060000 ext4: teach ext4_... |
2347 2348 |
err = ext4_remove_blocks(handle, inode, ex, partial_cluster, a, b); |
a86c61812 [PATCH] ext3: add... |
2349 2350 |
if (err) goto out; |
750c9c47a ext4: remove mess... |
2351 |
if (num == 0) |
d0d856e8b [PATCH] ext4: cle... |
2352 |
/* this extent is removed; mark slot entirely unused */ |
f65e6fba1 [PATCH] ext4: 48b... |
2353 |
ext4_ext_store_pblock(ex, 0); |
a86c61812 [PATCH] ext3: add... |
2354 |
|
a86c61812 [PATCH] ext3: add... |
2355 |
ex->ee_len = cpu_to_le16(num); |
749269fac Change on-disk fo... |
2356 2357 2358 2359 2360 |
/* * Do not mark uninitialized if all the blocks in the * extent have been removed. */ if (uninitialized && num) |
a2df2a634 fallocate support... |
2361 |
ext4_ext_mark_uninitialized(ex); |
d583fb87a ext4: punch out e... |
2362 2363 2364 2365 2366 |
/* * If the extent was completely released, * we need to remove it from the leaf */ if (num == 0) { |
f17722f91 ext4: Fix max fil... |
2367 |
if (end != EXT_MAX_BLOCKS - 1) { |
d583fb87a ext4: punch out e... |
2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 |
/* * For hole punching, we need to scoot all the * extents up when an extent is removed so that * we dont have blank extents in the middle */ memmove(ex, ex+1, (EXT_LAST_EXTENT(eh) - ex) * sizeof(struct ext4_extent)); /* Now get rid of the one at the end */ memset(EXT_LAST_EXTENT(eh), 0, sizeof(struct ext4_extent)); } le16_add_cpu(&eh->eh_entries, -1); |
0aa060000 ext4: teach ext4_... |
2381 2382 |
} else *partial_cluster = 0; |
d583fb87a ext4: punch out e... |
2383 |
|
750c9c47a ext4: remove mess... |
2384 2385 2386 |
err = ext4_ext_dirty(handle, inode, path + depth); if (err) goto out; |
bf52c6f7a ext4: let ext4_ex... |
2387 2388 |
ext_debug("new extent: %u:%u:%llu ", ex_ee_block, num, |
bf89d16f6 ext4: rename {ext... |
2389 |
ext4_ext_pblock(ex)); |
a86c61812 [PATCH] ext3: add... |
2390 2391 |
ex--; ex_ee_block = le32_to_cpu(ex->ee_block); |
a2df2a634 fallocate support... |
2392 |
ex_ee_len = ext4_ext_get_actual_len(ex); |
a86c61812 [PATCH] ext3: add... |
2393 2394 2395 2396 |
} if (correct_index && eh->eh_entries) err = ext4_ext_correct_indexes(handle, inode, path); |
0aa060000 ext4: teach ext4_... |
2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 |
/* * If there is still a entry in the leaf node, check to see if * it references the partial cluster. This is the only place * where it could; if it doesn't, we can free the cluster. */ if (*partial_cluster && ex >= EXT_FIRST_EXTENT(eh) && (EXT4_B2C(sbi, ext4_ext_pblock(ex) + ex_ee_len - 1) != *partial_cluster)) { int flags = EXT4_FREE_BLOCKS_FORGET; if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) flags |= EXT4_FREE_BLOCKS_METADATA; ext4_free_blocks(handle, inode, NULL, EXT4_C2B(sbi, *partial_cluster), sbi->s_cluster_ratio, flags); *partial_cluster = 0; } |
a86c61812 [PATCH] ext3: add... |
2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 |
/* if this leaf is free, then we should * remove it from index block above */ if (err == 0 && eh->eh_entries == 0 && path[depth].p_bh != NULL) err = ext4_ext_rm_idx(handle, inode, path + depth); out: return err; } /* |
d0d856e8b [PATCH] ext4: cle... |
2425 2426 |
* ext4_ext_more_to_rm: * returns 1 if current index has to be freed (even partial) |
a86c61812 [PATCH] ext3: add... |
2427 |
*/ |
09b882520 [PATCH] ext4: Eli... |
2428 |
static int |
a86c61812 [PATCH] ext3: add... |
2429 2430 2431 2432 2433 2434 2435 2436 |
ext4_ext_more_to_rm(struct ext4_ext_path *path) { BUG_ON(path->p_idx == NULL); if (path->p_idx < EXT_FIRST_INDEX(path->p_hdr)) return 0; /* |
d0d856e8b [PATCH] ext4: cle... |
2437 |
* if truncate on deeper level happened, it wasn't partial, |
a86c61812 [PATCH] ext3: add... |
2438 2439 2440 2441 2442 2443 |
* so we have to consider current index for truncation */ if (le16_to_cpu(path->p_hdr->eh_entries) == path->p_block) return 0; return 1; } |
c6a0371cb ext4: remove unne... |
2444 |
static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start) |
a86c61812 [PATCH] ext3: add... |
2445 2446 2447 2448 |
{ struct super_block *sb = inode->i_sb; int depth = ext_depth(inode); struct ext4_ext_path *path; |
0aa060000 ext4: teach ext4_... |
2449 |
ext4_fsblk_t partial_cluster = 0; |
a86c61812 [PATCH] ext3: add... |
2450 |
handle_t *handle; |
0617b83fa ext4: restart ext... |
2451 |
int i, err; |
a86c61812 [PATCH] ext3: add... |
2452 |
|
725d26d3f ext4: Introduce e... |
2453 2454 |
ext_debug("truncate since %u ", start); |
a86c61812 [PATCH] ext3: add... |
2455 2456 2457 2458 2459 |
/* probably first extent we're gonna free will be last in block */ handle = ext4_journal_start(inode, depth + 1); if (IS_ERR(handle)) return PTR_ERR(handle); |
0617b83fa ext4: restart ext... |
2460 |
again: |
a86c61812 [PATCH] ext3: add... |
2461 |
ext4_ext_invalidate_cache(inode); |
d8990240d ext4: add some tr... |
2462 |
trace_ext4_ext_remove_space(inode, start, depth); |
a86c61812 [PATCH] ext3: add... |
2463 |
/* |
d0d856e8b [PATCH] ext4: cle... |
2464 2465 |
* We start scanning from right side, freeing all the blocks * after i_size and walking into the tree depth-wise. |
a86c61812 [PATCH] ext3: add... |
2466 |
*/ |
0617b83fa ext4: restart ext... |
2467 |
depth = ext_depth(inode); |
216553c4b ext4: fix wrong g... |
2468 |
path = kzalloc(sizeof(struct ext4_ext_path) * (depth + 1), GFP_NOFS); |
a86c61812 [PATCH] ext3: add... |
2469 2470 2471 2472 |
if (path == NULL) { ext4_journal_stop(handle); return -ENOMEM; } |
0617b83fa ext4: restart ext... |
2473 |
path[0].p_depth = depth; |
a86c61812 [PATCH] ext3: add... |
2474 |
path[0].p_hdr = ext_inode_hdr(inode); |
56b19868a ext4: Add checks ... |
2475 |
if (ext4_ext_check(inode, path[0].p_hdr, depth)) { |
a86c61812 [PATCH] ext3: add... |
2476 2477 2478 |
err = -EIO; goto out; } |
0617b83fa ext4: restart ext... |
2479 |
i = err = 0; |
a86c61812 [PATCH] ext3: add... |
2480 2481 2482 2483 |
while (i >= 0 && err == 0) { if (i == depth) { /* this is leaf block */ |
d583fb87a ext4: punch out e... |
2484 |
err = ext4_ext_rm_leaf(handle, inode, path, |
0aa060000 ext4: teach ext4_... |
2485 2486 |
&partial_cluster, start, EXT_MAX_BLOCKS - 1); |
d0d856e8b [PATCH] ext4: cle... |
2487 |
/* root level has p_bh == NULL, brelse() eats this */ |
a86c61812 [PATCH] ext3: add... |
2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 |
brelse(path[i].p_bh); path[i].p_bh = NULL; i--; continue; } /* this is index block */ if (!path[i].p_hdr) { ext_debug("initialize header "); path[i].p_hdr = ext_block_hdr(path[i].p_bh); |
a86c61812 [PATCH] ext3: add... |
2499 |
} |
a86c61812 [PATCH] ext3: add... |
2500 |
if (!path[i].p_idx) { |
d0d856e8b [PATCH] ext4: cle... |
2501 |
/* this level hasn't been touched yet */ |
a86c61812 [PATCH] ext3: add... |
2502 2503 2504 2505 2506 2507 2508 |
path[i].p_idx = EXT_LAST_INDEX(path[i].p_hdr); path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries)+1; ext_debug("init index ptr: hdr 0x%p, num %d ", path[i].p_hdr, le16_to_cpu(path[i].p_hdr->eh_entries)); } else { |
d0d856e8b [PATCH] ext4: cle... |
2509 |
/* we were already here, see at next index */ |
a86c61812 [PATCH] ext3: add... |
2510 2511 2512 2513 2514 2515 2516 2517 |
path[i].p_idx--; } ext_debug("level %d - index, first 0x%p, cur 0x%p ", i, EXT_FIRST_INDEX(path[i].p_hdr), path[i].p_idx); if (ext4_ext_more_to_rm(path + i)) { |
c29c0ae7f ext4: Make extent... |
2518 |
struct buffer_head *bh; |
a86c61812 [PATCH] ext3: add... |
2519 |
/* go to the next level */ |
2ae021076 [PATCH] ext4: blk... |
2520 2521 |
ext_debug("move to level %d (block %llu) ", |
bf89d16f6 ext4: rename {ext... |
2522 |
i + 1, ext4_idx_pblock(path[i].p_idx)); |
a86c61812 [PATCH] ext3: add... |
2523 |
memset(path + i + 1, 0, sizeof(*path)); |
bf89d16f6 ext4: rename {ext... |
2524 |
bh = sb_bread(sb, ext4_idx_pblock(path[i].p_idx)); |
c29c0ae7f ext4: Make extent... |
2525 |
if (!bh) { |
a86c61812 [PATCH] ext3: add... |
2526 2527 2528 2529 |
/* should we reset i_size? */ err = -EIO; break; } |
c29c0ae7f ext4: Make extent... |
2530 2531 2532 2533 |
if (WARN_ON(i + 1 > depth)) { err = -EIO; break; } |
56b19868a ext4: Add checks ... |
2534 |
if (ext4_ext_check(inode, ext_block_hdr(bh), |
c29c0ae7f ext4: Make extent... |
2535 2536 2537 2538 2539 |
depth - i - 1)) { err = -EIO; break; } path[i + 1].p_bh = bh; |
a86c61812 [PATCH] ext3: add... |
2540 |
|
d0d856e8b [PATCH] ext4: cle... |
2541 2542 |
/* save actual number of indexes since this * number is changed at the next iteration */ |
a86c61812 [PATCH] ext3: add... |
2543 2544 2545 |
path[i].p_block = le16_to_cpu(path[i].p_hdr->eh_entries); i++; } else { |
d0d856e8b [PATCH] ext4: cle... |
2546 |
/* we finished processing this index, go up */ |
a86c61812 [PATCH] ext3: add... |
2547 |
if (path[i].p_hdr->eh_entries == 0 && i > 0) { |
d0d856e8b [PATCH] ext4: cle... |
2548 |
/* index is empty, remove it; |
a86c61812 [PATCH] ext3: add... |
2549 2550 2551 2552 |
* handle must be already prepared by the * truncatei_leaf() */ err = ext4_ext_rm_idx(handle, inode, path + i); } |
d0d856e8b [PATCH] ext4: cle... |
2553 |
/* root level has p_bh == NULL, brelse() eats this */ |
a86c61812 [PATCH] ext3: add... |
2554 2555 2556 2557 2558 2559 2560 |
brelse(path[i].p_bh); path[i].p_bh = NULL; i--; ext_debug("return to level %d ", i); } } |
d8990240d ext4: add some tr... |
2561 2562 |
trace_ext4_ext_remove_space_done(inode, start, depth, partial_cluster, path->p_hdr->eh_entries); |
7b415bf60 ext4: Fix bigallo... |
2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 |
/* If we still have something in the partial cluster and we have removed * even the first extent, then we should free the blocks in the partial * cluster as well. */ if (partial_cluster && path->p_hdr->eh_entries == 0) { int flags = EXT4_FREE_BLOCKS_FORGET; if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) flags |= EXT4_FREE_BLOCKS_METADATA; ext4_free_blocks(handle, inode, NULL, EXT4_C2B(EXT4_SB(sb), partial_cluster), EXT4_SB(sb)->s_cluster_ratio, flags); partial_cluster = 0; } |
a86c61812 [PATCH] ext3: add... |
2577 2578 2579 |
/* TODO: flexible tree reduction should be here */ if (path->p_hdr->eh_entries == 0) { /* |
d0d856e8b [PATCH] ext4: cle... |
2580 2581 |
* truncate to zero freed all the tree, * so we need to correct eh_depth |
a86c61812 [PATCH] ext3: add... |
2582 2583 2584 2585 2586 |
*/ err = ext4_ext_get_access(handle, inode, path); if (err == 0) { ext_inode_hdr(inode)->eh_depth = 0; ext_inode_hdr(inode)->eh_max = |
55ad63bf3 ext4: fix extent ... |
2587 |
cpu_to_le16(ext4_ext_space_root(inode, 0)); |
a86c61812 [PATCH] ext3: add... |
2588 2589 2590 2591 |
err = ext4_ext_dirty(handle, inode, path); } } out: |
a86c61812 [PATCH] ext3: add... |
2592 2593 |
ext4_ext_drop_refs(path); kfree(path); |
0617b83fa ext4: restart ext... |
2594 2595 |
if (err == -EAGAIN) goto again; |
a86c61812 [PATCH] ext3: add... |
2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 |
ext4_journal_stop(handle); return err; } /* * called at mount time */ void ext4_ext_init(struct super_block *sb) { /* * possible initialization would be here */ |
83982b6f4 ext4: Remove "ext... |
2609 |
if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { |
90576c0b9 ext4, jbd2: Drop ... |
2610 |
#if defined(AGGRESSIVE_TEST) || defined(CHECK_BINSEARCH) || defined(EXTENTS_STATS) |
4776004f5 ext4: Add printk ... |
2611 |
printk(KERN_INFO "EXT4-fs: file extents enabled"); |
bbf2f9fb1 Fix misspellings ... |
2612 2613 |
#ifdef AGGRESSIVE_TEST printk(", aggressive tests"); |
a86c61812 [PATCH] ext3: add... |
2614 2615 2616 2617 2618 2619 2620 2621 2622 |
#endif #ifdef CHECK_BINSEARCH printk(", check binsearch"); #endif #ifdef EXTENTS_STATS printk(", stats"); #endif printk(" "); |
90576c0b9 ext4, jbd2: Drop ... |
2623 |
#endif |
a86c61812 [PATCH] ext3: add... |
2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 |
#ifdef EXTENTS_STATS spin_lock_init(&EXT4_SB(sb)->s_ext_stats_lock); EXT4_SB(sb)->s_ext_min = 1 << 30; EXT4_SB(sb)->s_ext_max = 0; #endif } } /* * called at umount time */ void ext4_ext_release(struct super_block *sb) { |
83982b6f4 ext4: Remove "ext... |
2637 |
if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) |
a86c61812 [PATCH] ext3: add... |
2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 |
return; #ifdef EXTENTS_STATS if (EXT4_SB(sb)->s_ext_blocks && EXT4_SB(sb)->s_ext_extents) { struct ext4_sb_info *sbi = EXT4_SB(sb); printk(KERN_ERR "EXT4-fs: %lu blocks in %lu extents (%lu ave) ", sbi->s_ext_blocks, sbi->s_ext_extents, sbi->s_ext_blocks / sbi->s_ext_extents); printk(KERN_ERR "EXT4-fs: extents: %lu min, %lu max, max depth %lu ", sbi->s_ext_min, sbi->s_ext_max, sbi->s_depth_max); } #endif } |
093a088b7 ext4: ENOSPC erro... |
2653 2654 2655 |
/* FIXME!! we need to try to merge to left or right after zero-out */ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) { |
2407518de ext4: use sb_issu... |
2656 2657 |
ext4_fsblk_t ee_pblock; unsigned int ee_len; |
b720303df ext4: fix memory ... |
2658 |
int ret; |
093a088b7 ext4: ENOSPC erro... |
2659 |
|
093a088b7 ext4: ENOSPC erro... |
2660 |
ee_len = ext4_ext_get_actual_len(ex); |
bf89d16f6 ext4: rename {ext... |
2661 |
ee_pblock = ext4_ext_pblock(ex); |
b720303df ext4: fix memory ... |
2662 |
|
a107e5a3a Merge branch 'nex... |
2663 |
ret = sb_issue_zeroout(inode->i_sb, ee_pblock, ee_len, GFP_NOFS); |
2407518de ext4: use sb_issu... |
2664 2665 |
if (ret > 0) ret = 0; |
093a088b7 ext4: ENOSPC erro... |
2666 |
|
2407518de ext4: use sb_issu... |
2667 |
return ret; |
093a088b7 ext4: ENOSPC erro... |
2668 |
} |
47ea3bb59 ext4: add ext4_sp... |
2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 |
/* * used by extent splitting. */ #define EXT4_EXT_MAY_ZEROOUT 0x1 /* safe to zeroout if split fails \ due to ENOSPC */ #define EXT4_EXT_MARK_UNINIT1 0x2 /* mark first half uninitialized */ #define EXT4_EXT_MARK_UNINIT2 0x4 /* mark second half uninitialized */ /* * ext4_split_extent_at() splits an extent at given block. * * @handle: the journal handle * @inode: the file inode * @path: the path to the extent * @split: the logical block where the extent is splitted. * @split_flags: indicates if the extent could be zeroout if split fails, and * the states(init or uninit) of new extents. * @flags: flags used to insert new extent to extent tree. * * * Splits extent [a, b] into two extents [a, @split) and [@split, b], states * of which are deterimined by split_flag. * * There are two cases: * a> the extent are splitted into two extent. * b> split is not needed, and just mark the extent. * * return 0 on success. */ static int ext4_split_extent_at(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, ext4_lblk_t split, int split_flag, int flags) { ext4_fsblk_t newblock; ext4_lblk_t ee_block; struct ext4_extent *ex, newex, orig_ex; struct ext4_extent *ex2 = NULL; unsigned int ee_len, depth; int err = 0; ext_debug("ext4_split_extents_at: inode %lu, logical" "block %llu ", inode->i_ino, (unsigned long long)split); ext4_ext_show_leaf(inode, path); depth = ext_depth(inode); ex = path[depth].p_ext; ee_block = le32_to_cpu(ex->ee_block); ee_len = ext4_ext_get_actual_len(ex); newblock = split - ee_block + ext4_ext_pblock(ex); BUG_ON(split < ee_block || split >= (ee_block + ee_len)); err = ext4_ext_get_access(handle, inode, path + depth); if (err) goto out; if (split == ee_block) { /* * case b: block @split is the block that the extent begins with * then we just change the state of the extent, and splitting * is not needed. */ if (split_flag & EXT4_EXT_MARK_UNINIT2) ext4_ext_mark_uninitialized(ex); else ext4_ext_mark_initialized(ex); if (!(flags & EXT4_GET_BLOCKS_PRE_IO)) ext4_ext_try_to_merge(inode, path, ex); err = ext4_ext_dirty(handle, inode, path + depth); goto out; } /* case a */ memcpy(&orig_ex, ex, sizeof(orig_ex)); ex->ee_len = cpu_to_le16(split - ee_block); if (split_flag & EXT4_EXT_MARK_UNINIT1) ext4_ext_mark_uninitialized(ex); /* * path may lead to new leaf, not to original leaf any more * after ext4_ext_insert_extent() returns, */ err = ext4_ext_dirty(handle, inode, path + depth); if (err) goto fix_extent_len; ex2 = &newex; ex2->ee_block = cpu_to_le32(split); ex2->ee_len = cpu_to_le16(ee_len - (split - ee_block)); ext4_ext_store_pblock(ex2, newblock); if (split_flag & EXT4_EXT_MARK_UNINIT2) ext4_ext_mark_uninitialized(ex2); err = ext4_ext_insert_extent(handle, inode, path, &newex, flags); if (err == -ENOSPC && (EXT4_EXT_MAY_ZEROOUT & split_flag)) { err = ext4_ext_zeroout(inode, &orig_ex); if (err) goto fix_extent_len; /* update the extent length and mark as initialized */ ex->ee_len = cpu_to_le32(ee_len); ext4_ext_try_to_merge(inode, path, ex); err = ext4_ext_dirty(handle, inode, path + depth); goto out; } else if (err) goto fix_extent_len; out: ext4_ext_show_leaf(inode, path); return err; fix_extent_len: ex->ee_len = orig_ex.ee_len; ext4_ext_dirty(handle, inode, path + depth); return err; } /* * ext4_split_extents() splits an extent and mark extent which is covered * by @map as split_flags indicates * * It may result in splitting the extent into multiple extents (upto three) * There are three possibilities: * a> There is no split required * b> Splits in two extents: Split is happening at either end of the extent * c> Splits in three extents: Somone is splitting in middle of the extent * */ static int ext4_split_extent(handle_t *handle, struct inode *inode, struct ext4_ext_path *path, struct ext4_map_blocks *map, int split_flag, int flags) { ext4_lblk_t ee_block; struct ext4_extent *ex; unsigned int ee_len, depth; int err = 0; int uninitialized; int split_flag1, flags1; depth = ext_depth(inode); ex = path[depth].p_ext; ee_block = le32_to_cpu(ex->ee_block); ee_len = ext4_ext_get_actual_len(ex); uninitialized = ext4_ext_is_uninitialized(ex); if (map->m_lblk + map->m_len < ee_block + ee_len) { split_flag1 = split_flag & EXT4_EXT_MAY_ZEROOUT ? EXT4_EXT_MAY_ZEROOUT : 0; flags1 = flags | EXT4_GET_BLOCKS_PRE_IO; if (uninitialized) split_flag1 |= EXT4_EXT_MARK_UNINIT1 | EXT4_EXT_MARK_UNINIT2; err = ext4_split_extent_at(handle, inode, path, map->m_lblk + map->m_len, split_flag1, flags1); |
93917411b ext4: make ext4_s... |
2832 2833 |
if (err) goto out; |
47ea3bb59 ext4: add ext4_sp... |
2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 |
} ext4_ext_drop_refs(path); path = ext4_ext_find_extent(inode, map->m_lblk, path); if (IS_ERR(path)) return PTR_ERR(path); if (map->m_lblk >= ee_block) { split_flag1 = split_flag & EXT4_EXT_MAY_ZEROOUT ? EXT4_EXT_MAY_ZEROOUT : 0; if (uninitialized) split_flag1 |= EXT4_EXT_MARK_UNINIT1; if (split_flag & EXT4_EXT_MARK_UNINIT2) split_flag1 |= EXT4_EXT_MARK_UNINIT2; err = ext4_split_extent_at(handle, inode, path, map->m_lblk, split_flag1, flags); if (err) goto out; } ext4_ext_show_leaf(inode, path); out: return err ? err : map->m_len; } |
3977c965e ext4: zero out sm... |
2858 |
#define EXT4_EXT_ZERO_LEN 7 |
56055d3ae write support for... |
2859 |
/* |
e35fd6609 ext4: Add new abs... |
2860 |
* This function is called by ext4_ext_map_blocks() if someone tries to write |
56055d3ae write support for... |
2861 |
* to an uninitialized extent. It may result in splitting the uninitialized |
25985edce Fix common misspe... |
2862 |
* extent into multiple extents (up to three - one initialized and two |
56055d3ae write support for... |
2863 2864 2865 2866 2867 |
* uninitialized). * There are three possibilities: * a> There is no split required: Entire extent should be initialized * b> Splits in two extents: Write is happening at either end of the extent * c> Splits in three extents: Somone is writing in middle of the extent |
6f91bc5fd ext4: optimize ex... |
2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 |
* * Pre-conditions: * - The extent pointed to by 'path' is uninitialized. * - The extent pointed to by 'path' contains a superset * of the logical span [map->m_lblk, map->m_lblk + map->m_len). * * Post-conditions on success: * - the returned value is the number of blocks beyond map->l_lblk * that are allocated and initialized. * It is guaranteed to be >= map->m_len. |
56055d3ae write support for... |
2878 |
*/ |
725d26d3f ext4: Introduce e... |
2879 |
static int ext4_ext_convert_to_initialized(handle_t *handle, |
e35fd6609 ext4: Add new abs... |
2880 2881 2882 |
struct inode *inode, struct ext4_map_blocks *map, struct ext4_ext_path *path) |
56055d3ae write support for... |
2883 |
{ |
6f91bc5fd ext4: optimize ex... |
2884 |
struct ext4_extent_header *eh; |
667eff35a ext4: reimplement... |
2885 2886 2887 |
struct ext4_map_blocks split_map; struct ext4_extent zero_ex; struct ext4_extent *ex; |
21ca087a3 ext4: Do not zero... |
2888 |
ext4_lblk_t ee_block, eof_block; |
f85b287a0 ext4: error handl... |
2889 2890 |
unsigned int ee_len, depth; int allocated; |
56055d3ae write support for... |
2891 |
int err = 0; |
667eff35a ext4: reimplement... |
2892 |
int split_flag = 0; |
21ca087a3 ext4: Do not zero... |
2893 2894 2895 2896 |
ext_debug("ext4_ext_convert_to_initialized: inode %lu, logical" "block %llu, max_blocks %u ", inode->i_ino, |
e35fd6609 ext4: Add new abs... |
2897 |
(unsigned long long)map->m_lblk, map->m_len); |
21ca087a3 ext4: Do not zero... |
2898 2899 2900 |
eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
e35fd6609 ext4: Add new abs... |
2901 2902 |
if (eof_block < map->m_lblk + map->m_len) eof_block = map->m_lblk + map->m_len; |
56055d3ae write support for... |
2903 2904 |
depth = ext_depth(inode); |
6f91bc5fd ext4: optimize ex... |
2905 |
eh = path[depth].p_hdr; |
56055d3ae write support for... |
2906 2907 2908 |
ex = path[depth].p_ext; ee_block = le32_to_cpu(ex->ee_block); ee_len = ext4_ext_get_actual_len(ex); |
e35fd6609 ext4: Add new abs... |
2909 |
allocated = ee_len - (map->m_lblk - ee_block); |
56055d3ae write support for... |
2910 |
|
6f91bc5fd ext4: optimize ex... |
2911 2912 2913 2914 2915 |
trace_ext4_ext_convert_to_initialized_enter(inode, map, ex); /* Pre-conditions */ BUG_ON(!ext4_ext_is_uninitialized(ex)); BUG_ON(!in_range(map->m_lblk, ee_block, ee_len)); |
6f91bc5fd ext4: optimize ex... |
2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 |
/* * Attempt to transfer newly initialized blocks from the currently * uninitialized extent to its left neighbor. This is much cheaper * than an insertion followed by a merge as those involve costly * memmove() calls. This is the common case in steady state for * workloads doing fallocate(FALLOC_FL_KEEP_SIZE) followed by append * writes. * * Limitations of the current logic: * - L1: we only deal with writes at the start of the extent. * The approach could be extended to writes at the end * of the extent but this scenario was deemed less common. * - L2: we do not deal with writes covering the whole extent. * This would require removing the extent if the transfer * is possible. * - L3: we only attempt to merge with an extent stored in the * same extent tree node. */ if ((map->m_lblk == ee_block) && /*L1*/ (map->m_len < ee_len) && /*L2*/ (ex > EXT_FIRST_EXTENT(eh))) { /*L3*/ struct ext4_extent *prev_ex; ext4_lblk_t prev_lblk; ext4_fsblk_t prev_pblk, ee_pblk; unsigned int prev_len, write_len; prev_ex = ex - 1; prev_lblk = le32_to_cpu(prev_ex->ee_block); prev_len = ext4_ext_get_actual_len(prev_ex); prev_pblk = ext4_ext_pblock(prev_ex); ee_pblk = ext4_ext_pblock(ex); write_len = map->m_len; /* * A transfer of blocks from 'ex' to 'prev_ex' is allowed * upon those conditions: * - C1: prev_ex is initialized, * - C2: prev_ex is logically abutting ex, * - C3: prev_ex is physically abutting ex, * - C4: prev_ex can receive the additional blocks without * overflowing the (initialized) length limit. */ if ((!ext4_ext_is_uninitialized(prev_ex)) && /*C1*/ ((prev_lblk + prev_len) == ee_block) && /*C2*/ ((prev_pblk + prev_len) == ee_pblk) && /*C3*/ (prev_len < (EXT_INIT_MAX_LEN - write_len))) { /*C4*/ err = ext4_ext_get_access(handle, inode, path + depth); if (err) goto out; trace_ext4_ext_convert_to_initialized_fastpath(inode, map, ex, prev_ex); /* Shift the start of ex by 'write_len' blocks */ ex->ee_block = cpu_to_le32(ee_block + write_len); ext4_ext_store_pblock(ex, ee_pblk + write_len); ex->ee_len = cpu_to_le16(ee_len - write_len); ext4_ext_mark_uninitialized(ex); /* Restore the flag */ /* Extend prev_ex by 'write_len' blocks */ prev_ex->ee_len = cpu_to_le16(prev_len + write_len); /* Mark the block containing both extents as dirty */ ext4_ext_dirty(handle, inode, path + depth); /* Update path to point to the right extent */ path[depth].p_ext = prev_ex; /* Result: number of initialized blocks past m_lblk */ allocated = write_len; goto out; } } |
667eff35a ext4: reimplement... |
2990 |
WARN_ON(map->m_lblk < ee_block); |
21ca087a3 ext4: Do not zero... |
2991 2992 2993 2994 |
/* * It is safe to convert extent to initialized via explicit * zeroout only if extent is fully insde i_size or new_size. */ |
667eff35a ext4: reimplement... |
2995 |
split_flag |= ee_block + ee_len <= eof_block ? EXT4_EXT_MAY_ZEROOUT : 0; |
21ca087a3 ext4: Do not zero... |
2996 |
|
3977c965e ext4: zero out sm... |
2997 |
/* If extent has less than 2*EXT4_EXT_ZERO_LEN zerout directly */ |
667eff35a ext4: reimplement... |
2998 2999 3000 |
if (ee_len <= 2*EXT4_EXT_ZERO_LEN && (EXT4_EXT_MAY_ZEROOUT & split_flag)) { err = ext4_ext_zeroout(inode, ex); |
3977c965e ext4: zero out sm... |
3001 |
if (err) |
d03856bd5 ext4: Fix data co... |
3002 |
goto out; |
d03856bd5 ext4: Fix data co... |
3003 3004 3005 3006 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) goto out; |
667eff35a ext4: reimplement... |
3007 3008 3009 3010 |
ext4_ext_mark_initialized(ex); ext4_ext_try_to_merge(inode, path, ex); err = ext4_ext_dirty(handle, inode, path + depth); goto out; |
56055d3ae write support for... |
3011 |
} |
667eff35a ext4: reimplement... |
3012 |
|
56055d3ae write support for... |
3013 |
/* |
667eff35a ext4: reimplement... |
3014 3015 3016 3017 3018 |
* four cases: * 1. split the extent into three extents. * 2. split the extent into two extents, zeroout the first half. * 3. split the extent into two extents, zeroout the second half. * 4. split the extent into two extents with out zeroout. |
56055d3ae write support for... |
3019 |
*/ |
667eff35a ext4: reimplement... |
3020 3021 3022 3023 3024 3025 3026 3027 |
split_map.m_lblk = map->m_lblk; split_map.m_len = map->m_len; if (allocated > map->m_len) { if (allocated <= EXT4_EXT_ZERO_LEN && (EXT4_EXT_MAY_ZEROOUT & split_flag)) { /* case 3 */ zero_ex.ee_block = |
9b940f8e8 ext4: ext4_ext_co... |
3028 3029 |
cpu_to_le32(map->m_lblk); zero_ex.ee_len = cpu_to_le16(allocated); |
667eff35a ext4: reimplement... |
3030 3031 3032 |
ext4_ext_store_pblock(&zero_ex, ext4_ext_pblock(ex) + map->m_lblk - ee_block); err = ext4_ext_zeroout(inode, &zero_ex); |
56055d3ae write support for... |
3033 3034 |
if (err) goto out; |
667eff35a ext4: reimplement... |
3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 |
split_map.m_lblk = map->m_lblk; split_map.m_len = allocated; } else if ((map->m_lblk - ee_block + map->m_len < EXT4_EXT_ZERO_LEN) && (EXT4_EXT_MAY_ZEROOUT & split_flag)) { /* case 2 */ if (map->m_lblk != ee_block) { zero_ex.ee_block = ex->ee_block; zero_ex.ee_len = cpu_to_le16(map->m_lblk - ee_block); ext4_ext_store_pblock(&zero_ex, ext4_ext_pblock(ex)); err = ext4_ext_zeroout(inode, &zero_ex); if (err) goto out; } |
667eff35a ext4: reimplement... |
3051 |
split_map.m_lblk = ee_block; |
9b940f8e8 ext4: ext4_ext_co... |
3052 3053 |
split_map.m_len = map->m_lblk - ee_block + map->m_len; allocated = map->m_len; |
56055d3ae write support for... |
3054 3055 |
} } |
667eff35a ext4: reimplement... |
3056 3057 3058 3059 3060 |
allocated = ext4_split_extent(handle, inode, path, &split_map, split_flag, 0); if (allocated < 0) err = allocated; |
56055d3ae write support for... |
3061 3062 3063 |
out: return err ? err : allocated; } |
c278bfece ext4: Make ext4_g... |
3064 |
/* |
e35fd6609 ext4: Add new abs... |
3065 |
* This function is called by ext4_ext_map_blocks() from |
0031462b5 ext4: Split unini... |
3066 3067 3068 |
* ext4_get_blocks_dio_write() when DIO to write * to an uninitialized extent. * |
fd018fe82 ext4: fix comment... |
3069 |
* Writing to an uninitialized extent may result in splitting the uninitialized |
b595076a1 tree-wide: fix co... |
3070 |
* extent into multiple /initialized uninitialized extents (up to three) |
0031462b5 ext4: Split unini... |
3071 3072 3073 3074 3075 3076 |
* There are three possibilities: * a> There is no split required: Entire extent should be uninitialized * b> Splits in two extents: Write is happening at either end of the extent * c> Splits in three extents: Somone is writing in middle of the extent * * One of more index blocks maybe needed if the extent tree grow after |
b595076a1 tree-wide: fix co... |
3077 |
* the uninitialized extent split. To prevent ENOSPC occur at the IO |
0031462b5 ext4: Split unini... |
3078 |
* complete, we need to split the uninitialized extent before DIO submit |
421f91d21 fix typos concern... |
3079 |
* the IO. The uninitialized extent called at this time will be split |
0031462b5 ext4: Split unini... |
3080 3081 3082 |
* into three uninitialized extent(at most). After IO complete, the part * being filled will be convert to initialized by the end_io callback function * via ext4_convert_unwritten_extents(). |
ba230c3f6 ext4: Fix return ... |
3083 3084 |
* * Returns the size of uninitialized extent to be written on success. |
0031462b5 ext4: Split unini... |
3085 3086 3087 |
*/ static int ext4_split_unwritten_extents(handle_t *handle, struct inode *inode, |
e35fd6609 ext4: Add new abs... |
3088 |
struct ext4_map_blocks *map, |
0031462b5 ext4: Split unini... |
3089 |
struct ext4_ext_path *path, |
0031462b5 ext4: Split unini... |
3090 3091 |
int flags) { |
667eff35a ext4: reimplement... |
3092 3093 3094 3095 3096 |
ext4_lblk_t eof_block; ext4_lblk_t ee_block; struct ext4_extent *ex; unsigned int ee_len; int split_flag = 0, depth; |
21ca087a3 ext4: Do not zero... |
3097 3098 3099 3100 |
ext_debug("ext4_split_unwritten_extents: inode %lu, logical" "block %llu, max_blocks %u ", inode->i_ino, |
e35fd6609 ext4: Add new abs... |
3101 |
(unsigned long long)map->m_lblk, map->m_len); |
21ca087a3 ext4: Do not zero... |
3102 3103 3104 |
eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
e35fd6609 ext4: Add new abs... |
3105 3106 |
if (eof_block < map->m_lblk + map->m_len) eof_block = map->m_lblk + map->m_len; |
0031462b5 ext4: Split unini... |
3107 |
/* |
21ca087a3 ext4: Do not zero... |
3108 3109 3110 |
* It is safe to convert extent to initialized via explicit * zeroout only if extent is fully insde i_size or new_size. */ |
667eff35a ext4: reimplement... |
3111 3112 3113 3114 |
depth = ext_depth(inode); ex = path[depth].p_ext; ee_block = le32_to_cpu(ex->ee_block); ee_len = ext4_ext_get_actual_len(ex); |
0031462b5 ext4: Split unini... |
3115 |
|
667eff35a ext4: reimplement... |
3116 3117 |
split_flag |= ee_block + ee_len <= eof_block ? EXT4_EXT_MAY_ZEROOUT : 0; split_flag |= EXT4_EXT_MARK_UNINIT2; |
0031462b5 ext4: Split unini... |
3118 |
|
667eff35a ext4: reimplement... |
3119 3120 |
flags |= EXT4_GET_BLOCKS_PRE_IO; return ext4_split_extent(handle, inode, path, map, split_flag, flags); |
0031462b5 ext4: Split unini... |
3121 |
} |
197217a5a ext4: add a funct... |
3122 |
|
c7064ef13 ext4: mechanical ... |
3123 |
static int ext4_convert_unwritten_extents_endio(handle_t *handle, |
0031462b5 ext4: Split unini... |
3124 3125 3126 3127 |
struct inode *inode, struct ext4_ext_path *path) { struct ext4_extent *ex; |
0031462b5 ext4: Split unini... |
3128 3129 |
int depth; int err = 0; |
0031462b5 ext4: Split unini... |
3130 3131 |
depth = ext_depth(inode); |
0031462b5 ext4: Split unini... |
3132 |
ex = path[depth].p_ext; |
197217a5a ext4: add a funct... |
3133 3134 3135 3136 3137 |
ext_debug("ext4_convert_unwritten_extents_endio: inode %lu, logical" "block %llu, max_blocks %u ", inode->i_ino, (unsigned long long)le32_to_cpu(ex->ee_block), ext4_ext_get_actual_len(ex)); |
0031462b5 ext4: Split unini... |
3138 3139 3140 3141 3142 |
err = ext4_ext_get_access(handle, inode, path + depth); if (err) goto out; /* first mark the extent as initialized */ ext4_ext_mark_initialized(ex); |
197217a5a ext4: add a funct... |
3143 3144 |
/* note: ext4_ext_correct_indexes() isn't needed here because * borders are not changed |
0031462b5 ext4: Split unini... |
3145 |
*/ |
197217a5a ext4: add a funct... |
3146 |
ext4_ext_try_to_merge(inode, path, ex); |
0031462b5 ext4: Split unini... |
3147 3148 3149 3150 3151 3152 |
/* Mark modified extent as dirty */ err = ext4_ext_dirty(handle, inode, path + depth); out: ext4_ext_show_leaf(inode, path); return err; } |
515f41c33 ext4: Ensure zero... |
3153 3154 3155 3156 3157 3158 3159 |
static void unmap_underlying_metadata_blocks(struct block_device *bdev, sector_t block, int count) { int i; for (i = 0; i < count; i++) unmap_underlying_metadata(bdev, block + i); } |
58590b06d ext4: fix EOFBLOC... |
3160 3161 3162 3163 |
/* * Handle EOFBLOCKS_FL flag, clearing it if necessary */ static int check_eofblocks_fl(handle_t *handle, struct inode *inode, |
d002ebf1d ext4: don't pass ... |
3164 |
ext4_lblk_t lblk, |
58590b06d ext4: fix EOFBLOC... |
3165 3166 3167 3168 3169 |
struct ext4_ext_path *path, unsigned int len) { int i, depth; struct ext4_extent_header *eh; |
65922cb5c ext4: unused vari... |
3170 |
struct ext4_extent *last_ex; |
58590b06d ext4: fix EOFBLOC... |
3171 3172 3173 3174 3175 3176 |
if (!ext4_test_inode_flag(inode, EXT4_INODE_EOFBLOCKS)) return 0; depth = ext_depth(inode); eh = path[depth].p_hdr; |
58590b06d ext4: fix EOFBLOC... |
3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 |
if (unlikely(!eh->eh_entries)) { EXT4_ERROR_INODE(inode, "eh->eh_entries == 0 and " "EOFBLOCKS_FL set"); return -EIO; } last_ex = EXT_LAST_EXTENT(eh); /* * We should clear the EOFBLOCKS_FL flag if we are writing the * last block in the last extent in the file. We test this by * first checking to see if the caller to * ext4_ext_get_blocks() was interested in the last block (or * a block beyond the last block) in the current extent. If * this turns out to be false, we can bail out from this * function immediately. */ |
d002ebf1d ext4: don't pass ... |
3193 |
if (lblk + len < le32_to_cpu(last_ex->ee_block) + |
58590b06d ext4: fix EOFBLOC... |
3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 |
ext4_ext_get_actual_len(last_ex)) return 0; /* * If the caller does appear to be planning to write at or * beyond the end of the current extent, we then test to see * if the current extent is the last extent in the file, by * checking to make sure it was reached via the rightmost node * at each level of the tree. */ for (i = depth-1; i >= 0; i--) if (path[i].p_idx != EXT_LAST_INDEX(path[i].p_hdr)) return 0; ext4_clear_inode_flag(inode, EXT4_INODE_EOFBLOCKS); return ext4_mark_inode_dirty(handle, inode); } |
7b415bf60 ext4: Fix bigallo... |
3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 |
/** * ext4_find_delalloc_range: find delayed allocated block in the given range. * * Goes through the buffer heads in the range [lblk_start, lblk_end] and returns * whether there are any buffers marked for delayed allocation. It returns '1' * on the first delalloc'ed buffer head found. If no buffer head in the given * range is marked for delalloc, it returns 0. * lblk_start should always be <= lblk_end. * search_hint_reverse is to indicate that searching in reverse from lblk_end to * lblk_start might be more efficient (i.e., we will likely hit the delalloc'ed * block sooner). This is useful when blocks are truncated sequentially from * lblk_start towards lblk_end. */ static int ext4_find_delalloc_range(struct inode *inode, ext4_lblk_t lblk_start, ext4_lblk_t lblk_end, int search_hint_reverse) { struct address_space *mapping = inode->i_mapping; struct buffer_head *head, *bh = NULL; struct page *page; ext4_lblk_t i, pg_lblk; pgoff_t index; |
8c48f7e88 ext4: optimize ex... |
3232 3233 |
if (!test_opt(inode->i_sb, DELALLOC)) return 0; |
7b415bf60 ext4: Fix bigallo... |
3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 |
/* reverse search wont work if fs block size is less than page size */ if (inode->i_blkbits < PAGE_CACHE_SHIFT) search_hint_reverse = 0; if (search_hint_reverse) i = lblk_end; else i = lblk_start; index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits); while ((i >= lblk_start) && (i <= lblk_end)) { page = find_get_page(mapping, index); |
5356f2615 ext4: attempt to ... |
3247 |
if (!page) |
7b415bf60 ext4: Fix bigallo... |
3248 |
goto nextpage; |
7b415bf60 ext4: Fix bigallo... |
3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 |
if (!page_has_buffers(page)) goto nextpage; head = page_buffers(page); if (!head) goto nextpage; bh = head; pg_lblk = index << (PAGE_CACHE_SHIFT - inode->i_blkbits); do { if (unlikely(pg_lblk < lblk_start)) { /* * This is possible when fs block size is less * than page size and our cluster starts/ends in * middle of the page. So we need to skip the * initial few blocks till we reach the 'lblk' */ pg_lblk++; continue; } |
5356f2615 ext4: attempt to ... |
3270 3271 3272 3273 3274 |
/* Check if the buffer is delayed allocated and that it * is not yet mapped. (when da-buffers are mapped during * their writeout, their da_mapped bit is set.) */ if (buffer_delay(bh) && !buffer_da_mapped(bh)) { |
7b415bf60 ext4: Fix bigallo... |
3275 |
page_cache_release(page); |
d8990240d ext4: add some tr... |
3276 3277 3278 3279 |
trace_ext4_find_delalloc_range(inode, lblk_start, lblk_end, search_hint_reverse, 1, i); |
7b415bf60 ext4: Fix bigallo... |
3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 |
return 1; } if (search_hint_reverse) i--; else i++; } while ((i >= lblk_start) && (i <= lblk_end) && ((bh = bh->b_this_page) != head)); nextpage: if (page) page_cache_release(page); /* * Move to next page. 'i' will be the first lblk in the next * page. */ if (search_hint_reverse) index--; else index++; i = index << (PAGE_CACHE_SHIFT - inode->i_blkbits); } |
d8990240d ext4: add some tr... |
3301 3302 |
trace_ext4_find_delalloc_range(inode, lblk_start, lblk_end, search_hint_reverse, 0, 0); |
7b415bf60 ext4: Fix bigallo... |
3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 |
return 0; } int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk, int search_hint_reverse) { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ext4_lblk_t lblk_start, lblk_end; lblk_start = lblk & (~(sbi->s_cluster_ratio - 1)); lblk_end = lblk_start + sbi->s_cluster_ratio - 1; return ext4_find_delalloc_range(inode, lblk_start, lblk_end, search_hint_reverse); } /** * Determines how many complete clusters (out of those specified by the 'map') * are under delalloc and were reserved quota for. * This function is called when we are writing out the blocks that were * originally written with their allocation delayed, but then the space was * allocated using fallocate() before the delayed allocation could be resolved. * The cases to look for are: * ('=' indicated delayed allocated blocks * '-' indicates non-delayed allocated blocks) * (a) partial clusters towards beginning and/or end outside of allocated range * are not delalloc'ed. * Ex: * |----c---=|====c====|====c====|===-c----| * |++++++ allocated ++++++| * ==> 4 complete clusters in above example * * (b) partial cluster (outside of allocated range) towards either end is * marked for delayed allocation. In this case, we will exclude that * cluster. * Ex: * |----====c========|========c========| * |++++++ allocated ++++++| * ==> 1 complete clusters in above example * * Ex: * |================c================| * |++++++ allocated ++++++| * ==> 0 complete clusters in above example * * The ext4_da_update_reserve_space will be called only if we * determine here that there were some "entire" clusters that span * this 'allocated' range. * In the non-bigalloc case, this function will just end up returning num_blks * without ever calling ext4_find_delalloc_range. */ static unsigned int get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start, unsigned int num_blks) { struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); ext4_lblk_t alloc_cluster_start, alloc_cluster_end; ext4_lblk_t lblk_from, lblk_to, c_offset; unsigned int allocated_clusters = 0; alloc_cluster_start = EXT4_B2C(sbi, lblk_start); alloc_cluster_end = EXT4_B2C(sbi, lblk_start + num_blks - 1); /* max possible clusters for this allocation */ allocated_clusters = alloc_cluster_end - alloc_cluster_start + 1; |
d8990240d ext4: add some tr... |
3367 |
trace_ext4_get_reserved_cluster_alloc(inode, lblk_start, num_blks); |
7b415bf60 ext4: Fix bigallo... |
3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 |
/* Check towards left side */ c_offset = lblk_start & (sbi->s_cluster_ratio - 1); if (c_offset) { lblk_from = lblk_start & (~(sbi->s_cluster_ratio - 1)); lblk_to = lblk_from + c_offset - 1; if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0)) allocated_clusters--; } /* Now check towards right. */ c_offset = (lblk_start + num_blks) & (sbi->s_cluster_ratio - 1); if (allocated_clusters && c_offset) { lblk_from = lblk_start + num_blks; lblk_to = lblk_from + (sbi->s_cluster_ratio - c_offset) - 1; if (ext4_find_delalloc_range(inode, lblk_from, lblk_to, 0)) allocated_clusters--; } return allocated_clusters; } |
0031462b5 ext4: Split unini... |
3390 3391 |
static int ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, |
e35fd6609 ext4: Add new abs... |
3392 |
struct ext4_map_blocks *map, |
0031462b5 ext4: Split unini... |
3393 |
struct ext4_ext_path *path, int flags, |
e35fd6609 ext4: Add new abs... |
3394 |
unsigned int allocated, ext4_fsblk_t newblock) |
0031462b5 ext4: Split unini... |
3395 3396 3397 |
{ int ret = 0; int err = 0; |
8d5d02e6b ext4: async direc... |
3398 |
ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio; |
0031462b5 ext4: Split unini... |
3399 |
|
88635ca27 ext4: add missing... |
3400 3401 3402 |
ext_debug("ext4_ext_handle_uninitialized_extents: inode %lu, logical " "block %llu, max_blocks %u, flags %x, allocated %u ", |
e35fd6609 ext4: Add new abs... |
3403 |
inode->i_ino, (unsigned long long)map->m_lblk, map->m_len, |
0031462b5 ext4: Split unini... |
3404 3405 |
flags, allocated); ext4_ext_show_leaf(inode, path); |
d8990240d ext4: add some tr... |
3406 3407 |
trace_ext4_ext_handle_uninitialized_extents(inode, map, allocated, newblock); |
c7064ef13 ext4: mechanical ... |
3408 |
/* get_block() before submit the IO, split the extent */ |
744692dc0 ext4: use ext4_ge... |
3409 |
if ((flags & EXT4_GET_BLOCKS_PRE_IO)) { |
e35fd6609 ext4: Add new abs... |
3410 3411 |
ret = ext4_split_unwritten_extents(handle, inode, map, path, flags); |
5f5249507 ext4: skip conver... |
3412 3413 |
/* * Flag the inode(non aio case) or end_io struct (aio case) |
25985edce Fix common misspe... |
3414 |
* that this IO needs to conversion to written when IO is |
5f5249507 ext4: skip conver... |
3415 3416 |
* completed */ |
0edeb71dc ext4: Create help... |
3417 3418 3419 |
if (io) ext4_set_io_unwritten_flag(inode, io); else |
19f5fb7ad ext4: Use bitops ... |
3420 |
ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); |
744692dc0 ext4: use ext4_ge... |
3421 |
if (ext4_should_dioread_nolock(inode)) |
e35fd6609 ext4: Add new abs... |
3422 |
map->m_flags |= EXT4_MAP_UNINIT; |
0031462b5 ext4: Split unini... |
3423 3424 |
goto out; } |
c7064ef13 ext4: mechanical ... |
3425 |
/* IO end_io complete, convert the filled extent to written */ |
744692dc0 ext4: use ext4_ge... |
3426 |
if ((flags & EXT4_GET_BLOCKS_CONVERT)) { |
c7064ef13 ext4: mechanical ... |
3427 |
ret = ext4_convert_unwritten_extents_endio(handle, inode, |
0031462b5 ext4: Split unini... |
3428 |
path); |
58590b06d ext4: fix EOFBLOC... |
3429 |
if (ret >= 0) { |
b436b9bef ext4: Wait for pr... |
3430 |
ext4_update_inode_fsync_trans(handle, inode, 1); |
d002ebf1d ext4: don't pass ... |
3431 3432 |
err = check_eofblocks_fl(handle, inode, map->m_lblk, path, map->m_len); |
58590b06d ext4: fix EOFBLOC... |
3433 3434 |
} else err = ret; |
0031462b5 ext4: Split unini... |
3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 |
goto out2; } /* buffered IO case */ /* * repeat fallocate creation request * we already have an unwritten extent */ if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) goto map_out; /* buffered READ or buffered write_begin() lookup */ if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * We have blocks reserved already. We * return allocated blocks so that delalloc * won't do block reservation for us. But * the buffer head will be unmapped so that * a read from the block returns 0s. */ |
e35fd6609 ext4: Add new abs... |
3454 |
map->m_flags |= EXT4_MAP_UNWRITTEN; |
0031462b5 ext4: Split unini... |
3455 3456 3457 3458 |
goto out1; } /* buffered write, writepage time, convert*/ |
e35fd6609 ext4: Add new abs... |
3459 |
ret = ext4_ext_convert_to_initialized(handle, inode, map, path); |
a4e5d88b1 ext4: update EOFB... |
3460 |
if (ret >= 0) |
b436b9bef ext4: Wait for pr... |
3461 |
ext4_update_inode_fsync_trans(handle, inode, 1); |
0031462b5 ext4: Split unini... |
3462 3463 3464 3465 3466 3467 |
out: if (ret <= 0) { err = ret; goto out2; } else allocated = ret; |
e35fd6609 ext4: Add new abs... |
3468 |
map->m_flags |= EXT4_MAP_NEW; |
515f41c33 ext4: Ensure zero... |
3469 3470 3471 3472 3473 3474 3475 |
/* * if we allocated more blocks than requested * we need to make sure we unmap the extra block * allocated. The actual needed block will get * unmapped later when we find the buffer_head marked * new. */ |
e35fd6609 ext4: Add new abs... |
3476 |
if (allocated > map->m_len) { |
515f41c33 ext4: Ensure zero... |
3477 |
unmap_underlying_metadata_blocks(inode->i_sb->s_bdev, |
e35fd6609 ext4: Add new abs... |
3478 3479 3480 |
newblock + map->m_len, allocated - map->m_len); allocated = map->m_len; |
515f41c33 ext4: Ensure zero... |
3481 |
} |
5f634d064 ext4: Fix quota a... |
3482 3483 3484 3485 3486 3487 3488 3489 |
/* * If we have done fallocate with the offset that is already * delayed allocated, we would have block reservation * and quota reservation done in the delayed write path. * But fallocate would have already updated quota and block * count for this offset. So cancel these reservation */ |
7b415bf60 ext4: Fix bigallo... |
3490 3491 3492 3493 3494 3495 3496 3497 3498 |
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { unsigned int reserved_clusters; reserved_clusters = get_reserved_cluster_alloc(inode, map->m_lblk, map->m_len); if (reserved_clusters) ext4_da_update_reserve_space(inode, reserved_clusters, 0); } |
5f634d064 ext4: Fix quota a... |
3499 |
|
0031462b5 ext4: Split unini... |
3500 |
map_out: |
e35fd6609 ext4: Add new abs... |
3501 |
map->m_flags |= EXT4_MAP_MAPPED; |
a4e5d88b1 ext4: update EOFB... |
3502 3503 3504 3505 3506 3507 |
if ((flags & EXT4_GET_BLOCKS_KEEP_SIZE) == 0) { err = check_eofblocks_fl(handle, inode, map->m_lblk, path, map->m_len); if (err < 0) goto out2; } |
0031462b5 ext4: Split unini... |
3508 |
out1: |
e35fd6609 ext4: Add new abs... |
3509 3510 |
if (allocated > map->m_len) allocated = map->m_len; |
0031462b5 ext4: Split unini... |
3511 |
ext4_ext_show_leaf(inode, path); |
e35fd6609 ext4: Add new abs... |
3512 3513 |
map->m_pblk = newblock; map->m_len = allocated; |
0031462b5 ext4: Split unini... |
3514 3515 3516 3517 3518 3519 3520 |
out2: if (path) { ext4_ext_drop_refs(path); kfree(path); } return err ? err : allocated; } |
58590b06d ext4: fix EOFBLOC... |
3521 |
|
0031462b5 ext4: Split unini... |
3522 |
/* |
4d33b1ef1 ext4: teach ext4_... |
3523 3524 3525 |
* get_implied_cluster_alloc - check to see if the requested * allocation (in the map structure) overlaps with a cluster already * allocated in an extent. |
d8990240d ext4: add some tr... |
3526 |
* @sb The filesystem superblock structure |
4d33b1ef1 ext4: teach ext4_... |
3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 |
* @map The requested lblk->pblk mapping * @ex The extent structure which might contain an implied * cluster allocation * * This function is called by ext4_ext_map_blocks() after we failed to * find blocks that were already in the inode's extent tree. Hence, * we know that the beginning of the requested region cannot overlap * the extent from the inode's extent tree. There are three cases we * want to catch. The first is this case: * * |--- cluster # N--| * |--- extent ---| |---- requested region ---| * |==========| * * The second case that we need to test for is this one: * * |--------- cluster # N ----------------| * |--- requested region --| |------- extent ----| * |=======================| * * The third case is when the requested region lies between two extents * within the same cluster: * |------------- cluster # N-------------| * |----- ex -----| |---- ex_right ----| * |------ requested region ------| * |================| * * In each of the above cases, we need to set the map->m_pblk and * map->m_len so it corresponds to the return the extent labelled as * "|====|" from cluster #N, since it is already in use for data in * cluster EXT4_B2C(sbi, map->m_lblk). We will then return 1 to * signal to ext4_ext_map_blocks() that map->m_pblk should be treated * as a new "allocated" block region. Otherwise, we will return 0 and * ext4_ext_map_blocks() will then allocate one or more new clusters * by calling ext4_mb_new_blocks(). */ |
d8990240d ext4: add some tr... |
3563 |
static int get_implied_cluster_alloc(struct super_block *sb, |
4d33b1ef1 ext4: teach ext4_... |
3564 3565 3566 3567 |
struct ext4_map_blocks *map, struct ext4_extent *ex, struct ext4_ext_path *path) { |
d8990240d ext4: add some tr... |
3568 |
struct ext4_sb_info *sbi = EXT4_SB(sb); |
4d33b1ef1 ext4: teach ext4_... |
3569 3570 |
ext4_lblk_t c_offset = map->m_lblk & (sbi->s_cluster_ratio-1); ext4_lblk_t ex_cluster_start, ex_cluster_end; |
14d7f3efe ext4: remove unus... |
3571 |
ext4_lblk_t rr_cluster_start; |
4d33b1ef1 ext4: teach ext4_... |
3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 |
ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block); ext4_fsblk_t ee_start = ext4_ext_pblock(ex); unsigned short ee_len = ext4_ext_get_actual_len(ex); /* The extent passed in that we are trying to match */ ex_cluster_start = EXT4_B2C(sbi, ee_block); ex_cluster_end = EXT4_B2C(sbi, ee_block + ee_len - 1); /* The requested region passed into ext4_map_blocks() */ rr_cluster_start = EXT4_B2C(sbi, map->m_lblk); |
4d33b1ef1 ext4: teach ext4_... |
3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 |
if ((rr_cluster_start == ex_cluster_end) || (rr_cluster_start == ex_cluster_start)) { if (rr_cluster_start == ex_cluster_end) ee_start += ee_len - 1; map->m_pblk = (ee_start & ~(sbi->s_cluster_ratio - 1)) + c_offset; map->m_len = min(map->m_len, (unsigned) sbi->s_cluster_ratio - c_offset); /* * Check for and handle this case: * * |--------- cluster # N-------------| * |------- extent ----| * |--- requested region ---| * |===========| */ if (map->m_lblk < ee_block) map->m_len = min(map->m_len, ee_block - map->m_lblk); /* * Check for the case where there is already another allocated * block to the right of 'ex' but before the end of the cluster. * * |------------- cluster # N-------------| * |----- ex -----| |---- ex_right ----| * |------ requested region ------| * |================| */ if (map->m_lblk > ee_block) { ext4_lblk_t next = ext4_ext_next_allocated_block(path); map->m_len = min(map->m_len, next - map->m_lblk); } |
d8990240d ext4: add some tr... |
3616 3617 |
trace_ext4_get_implied_cluster_alloc_exit(sb, map, 1); |
4d33b1ef1 ext4: teach ext4_... |
3618 3619 |
return 1; } |
d8990240d ext4: add some tr... |
3620 3621 |
trace_ext4_get_implied_cluster_alloc_exit(sb, map, 0); |
4d33b1ef1 ext4: teach ext4_... |
3622 3623 3624 3625 3626 |
return 0; } /* |
f5ab0d1f8 ext4: Fix BUG whe... |
3627 3628 3629 |
* Block allocation/map/preallocation routine for extents based files * * |
c278bfece ext4: Make ext4_g... |
3630 |
* Need to be called with |
0e855ac8b ext4: Convert tru... |
3631 3632 |
* down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem) |
f5ab0d1f8 ext4: Fix BUG whe... |
3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 |
* * return > 0, number of of blocks already mapped/allocated * if create == 0 and these are pre-allocated blocks * buffer head is unmapped * otherwise blocks are mapped * * return = 0, if plain look up failed (blocks have not been allocated) * buffer head is unmapped * * return < 0, error case. |
c278bfece ext4: Make ext4_g... |
3643 |
*/ |
e35fd6609 ext4: Add new abs... |
3644 3645 |
int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, struct ext4_map_blocks *map, int flags) |
a86c61812 [PATCH] ext3: add... |
3646 3647 |
{ struct ext4_ext_path *path = NULL; |
4d33b1ef1 ext4: teach ext4_... |
3648 3649 |
struct ext4_extent newex, *ex, *ex2; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
0562e0bad ext4: add more tr... |
3650 |
ext4_fsblk_t newblock = 0; |
4d33b1ef1 ext4: teach ext4_... |
3651 3652 |
int free_on_err = 0, err = 0, depth, ret; unsigned int allocated = 0, offset = 0; |
81fdbb4a8 ext4: move variab... |
3653 |
unsigned int allocated_clusters = 0; |
e861304b8 ext4: add "punch ... |
3654 3655 |
unsigned int punched_out = 0; unsigned int result = 0; |
c9de560de ext4: Add multi b... |
3656 |
struct ext4_allocation_request ar; |
8d5d02e6b ext4: async direc... |
3657 |
ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio; |
4d33b1ef1 ext4: teach ext4_... |
3658 |
ext4_lblk_t cluster_offset; |
a86c61812 [PATCH] ext3: add... |
3659 |
|
84fe3bef5 ext4: Compile war... |
3660 3661 |
ext_debug("blocks %u/%u requested for inode %lu ", |
e35fd6609 ext4: Add new abs... |
3662 |
map->m_lblk, map->m_len, inode->i_ino); |
0562e0bad ext4: add more tr... |
3663 |
trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags); |
a86c61812 [PATCH] ext3: add... |
3664 3665 |
/* check in cache */ |
015861bad ext4: avoid waste... |
3666 3667 |
if (!(flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) && ext4_ext_in_cache(inode, map->m_lblk, &newex)) { |
b05e6ae58 ext4: drop ec_typ... |
3668 |
if (!newex.ee_start_lo && !newex.ee_start_hi) { |
7b415bf60 ext4: Fix bigallo... |
3669 3670 3671 |
if ((sbi->s_cluster_ratio > 1) && ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) map->m_flags |= EXT4_MAP_FROM_CLUSTER; |
c21770573 ext4: Define a ne... |
3672 |
if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { |
56055d3ae write support for... |
3673 3674 3675 3676 |
/* * block isn't allocated yet and * user doesn't want to allocate it */ |
a86c61812 [PATCH] ext3: add... |
3677 3678 3679 |
goto out2; } /* we should allocate requested block */ |
b05e6ae58 ext4: drop ec_typ... |
3680 |
} else { |
a86c61812 [PATCH] ext3: add... |
3681 |
/* block is already allocated */ |
7b415bf60 ext4: Fix bigallo... |
3682 3683 |
if (sbi->s_cluster_ratio > 1) map->m_flags |= EXT4_MAP_FROM_CLUSTER; |
e35fd6609 ext4: Add new abs... |
3684 |
newblock = map->m_lblk |
8c55e2041 EXT4: Fix whitespace |
3685 |
- le32_to_cpu(newex.ee_block) |
bf89d16f6 ext4: rename {ext... |
3686 |
+ ext4_ext_pblock(&newex); |
d0d856e8b [PATCH] ext4: cle... |
3687 |
/* number of remaining blocks in the extent */ |
b939e3766 ext4: Use the ext... |
3688 |
allocated = ext4_ext_get_actual_len(&newex) - |
e35fd6609 ext4: Add new abs... |
3689 |
(map->m_lblk - le32_to_cpu(newex.ee_block)); |
a86c61812 [PATCH] ext3: add... |
3690 |
goto out; |
a86c61812 [PATCH] ext3: add... |
3691 3692 3693 3694 |
} } /* find extent for this block */ |
e35fd6609 ext4: Add new abs... |
3695 |
path = ext4_ext_find_extent(inode, map->m_lblk, NULL); |
a86c61812 [PATCH] ext3: add... |
3696 3697 3698 3699 3700 3701 3702 3703 3704 |
if (IS_ERR(path)) { err = PTR_ERR(path); path = NULL; goto out2; } depth = ext_depth(inode); /* |
d0d856e8b [PATCH] ext4: cle... |
3705 3706 |
* consistent leaf must not be empty; * this situation is possible, though, _during_ tree modification; |
a86c61812 [PATCH] ext3: add... |
3707 3708 |
* this is why assert can't be put in ext4_ext_find_extent() */ |
273df556b ext4: Convert BUG... |
3709 3710 |
if (unlikely(path[depth].p_ext == NULL && depth != 0)) { EXT4_ERROR_INODE(inode, "bad extent address " |
f70f362b4 ext4: Avoid crash... |
3711 3712 3713 |
"lblock: %lu, depth: %d pblock %lld", (unsigned long) map->m_lblk, depth, path[depth].p_block); |
034fb4c95 ext4: replace BUG... |
3714 3715 3716 |
err = -EIO; goto out2; } |
a86c61812 [PATCH] ext3: add... |
3717 |
|
7e0289766 [PATCH] ext4: if ... |
3718 3719 |
ex = path[depth].p_ext; if (ex) { |
725d26d3f ext4: Introduce e... |
3720 |
ext4_lblk_t ee_block = le32_to_cpu(ex->ee_block); |
bf89d16f6 ext4: rename {ext... |
3721 |
ext4_fsblk_t ee_start = ext4_ext_pblock(ex); |
a2df2a634 fallocate support... |
3722 |
unsigned short ee_len; |
471d4011a [PATCH] ext4: uni... |
3723 3724 |
/* |
471d4011a [PATCH] ext4: uni... |
3725 |
* Uninitialized extents are treated as holes, except that |
56055d3ae write support for... |
3726 |
* we split out initialized portions during a write. |
471d4011a [PATCH] ext4: uni... |
3727 |
*/ |
a2df2a634 fallocate support... |
3728 |
ee_len = ext4_ext_get_actual_len(ex); |
d8990240d ext4: add some tr... |
3729 3730 |
trace_ext4_ext_show_extent(inode, ee_block, ee_start, ee_len); |
d0d856e8b [PATCH] ext4: cle... |
3731 |
/* if found extent covers block, simply return it */ |
e35fd6609 ext4: Add new abs... |
3732 |
if (in_range(map->m_lblk, ee_block, ee_len)) { |
81fdbb4a8 ext4: move variab... |
3733 |
struct ext4_map_blocks punch_map; |
0aa060000 ext4: teach ext4_... |
3734 |
ext4_fsblk_t partial_cluster = 0; |
e35fd6609 ext4: Add new abs... |
3735 |
newblock = map->m_lblk - ee_block + ee_start; |
d0d856e8b [PATCH] ext4: cle... |
3736 |
/* number of remaining blocks in the extent */ |
e35fd6609 ext4: Add new abs... |
3737 3738 3739 3740 |
allocated = ee_len - (map->m_lblk - ee_block); ext_debug("%u fit into %u:%d -> %llu ", map->m_lblk, ee_block, ee_len, newblock); |
56055d3ae write support for... |
3741 |
|
e861304b8 ext4: add "punch ... |
3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 |
if ((flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) == 0) { /* * Do not put uninitialized extent * in the cache */ if (!ext4_ext_is_uninitialized(ex)) { ext4_ext_put_in_cache(inode, ee_block, ee_len, ee_start); goto out; } ret = ext4_ext_handle_uninitialized_extents( handle, inode, map, path, flags, allocated, newblock); return ret; |
56055d3ae write support for... |
3756 |
} |
e861304b8 ext4: add "punch ... |
3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 |
/* * Punch out the map length, but only to the * end of the extent */ punched_out = allocated < map->m_len ? allocated : map->m_len; /* * Sense extents need to be converted to * uninitialized, they must fit in an * uninitialized extent */ if (punched_out > EXT_UNINIT_MAX_LEN) punched_out = EXT_UNINIT_MAX_LEN; punch_map.m_lblk = map->m_lblk; punch_map.m_pblk = newblock; punch_map.m_len = punched_out; punch_map.m_flags = 0; /* Check to see if the extent needs to be split */ if (punch_map.m_len != ee_len || punch_map.m_lblk != ee_block) { ret = ext4_split_extent(handle, inode, path, &punch_map, 0, EXT4_GET_BLOCKS_PUNCH_OUT_EXT | EXT4_GET_BLOCKS_PRE_IO); if (ret < 0) { err = ret; goto out2; } /* * find extent for the block at * the start of the hole */ ext4_ext_drop_refs(path); kfree(path); path = ext4_ext_find_extent(inode, map->m_lblk, NULL); if (IS_ERR(path)) { err = PTR_ERR(path); path = NULL; goto out2; } depth = ext_depth(inode); ex = path[depth].p_ext; ee_len = ext4_ext_get_actual_len(ex); ee_block = le32_to_cpu(ex->ee_block); ee_start = ext4_ext_pblock(ex); } ext4_ext_mark_uninitialized(ex); |
f7d0d3797 ext4: punch hole ... |
3815 3816 3817 |
ext4_ext_invalidate_cache(inode); err = ext4_ext_rm_leaf(handle, inode, path, |
0aa060000 ext4: teach ext4_... |
3818 3819 |
&partial_cluster, map->m_lblk, map->m_lblk + punched_out); |
f7d0d3797 ext4: punch hole ... |
3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 |
if (!err && path->p_hdr->eh_entries == 0) { /* * Punch hole freed all of this sub tree, * so we need to correct eh_depth */ err = ext4_ext_get_access(handle, inode, path); if (err == 0) { ext_inode_hdr(inode)->eh_depth = 0; ext_inode_hdr(inode)->eh_max = cpu_to_le16(ext4_ext_space_root( inode, 0)); err = ext4_ext_dirty( handle, inode, path); } } |
e861304b8 ext4: add "punch ... |
3837 3838 |
goto out2; |
a86c61812 [PATCH] ext3: add... |
3839 3840 |
} } |
7b415bf60 ext4: Fix bigallo... |
3841 3842 3843 |
if ((sbi->s_cluster_ratio > 1) && ext4_find_delalloc_cluster(inode, map->m_lblk, 0)) map->m_flags |= EXT4_MAP_FROM_CLUSTER; |
a86c61812 [PATCH] ext3: add... |
3844 |
/* |
d0d856e8b [PATCH] ext4: cle... |
3845 |
* requested block isn't allocated yet; |
a86c61812 [PATCH] ext3: add... |
3846 3847 |
* we couldn't try to create block if create flag is zero */ |
c21770573 ext4: Define a ne... |
3848 |
if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { |
56055d3ae write support for... |
3849 3850 3851 3852 |
/* * put just found gap into cache to speed up * subsequent requests */ |
e35fd6609 ext4: Add new abs... |
3853 |
ext4_ext_put_gap_in_cache(inode, path, map->m_lblk); |
a86c61812 [PATCH] ext3: add... |
3854 3855 |
goto out2; } |
4d33b1ef1 ext4: teach ext4_... |
3856 |
|
a86c61812 [PATCH] ext3: add... |
3857 |
/* |
c2ea3fde6 ext4: Remove old ... |
3858 |
* Okay, we need to do block allocation. |
63f579335 [PATCH] ext4 whit... |
3859 |
*/ |
7b415bf60 ext4: Fix bigallo... |
3860 |
map->m_flags &= ~EXT4_MAP_FROM_CLUSTER; |
4d33b1ef1 ext4: teach ext4_... |
3861 3862 3863 3864 3865 3866 3867 3868 |
newex.ee_block = cpu_to_le32(map->m_lblk); cluster_offset = map->m_lblk & (sbi->s_cluster_ratio-1); /* * If we are doing bigalloc, check to see if the extent returned * by ext4_ext_find_extent() implies a cluster we can use. */ if (cluster_offset && ex && |
d8990240d ext4: add some tr... |
3869 |
get_implied_cluster_alloc(inode->i_sb, map, ex, path)) { |
4d33b1ef1 ext4: teach ext4_... |
3870 3871 |
ar.len = allocated = map->m_len; newblock = map->m_pblk; |
7b415bf60 ext4: Fix bigallo... |
3872 |
map->m_flags |= EXT4_MAP_FROM_CLUSTER; |
4d33b1ef1 ext4: teach ext4_... |
3873 3874 |
goto got_allocated_blocks; } |
a86c61812 [PATCH] ext3: add... |
3875 |
|
c9de560de ext4: Add multi b... |
3876 |
/* find neighbour allocated blocks */ |
e35fd6609 ext4: Add new abs... |
3877 |
ar.lleft = map->m_lblk; |
c9de560de ext4: Add multi b... |
3878 3879 3880 |
err = ext4_ext_search_left(inode, path, &ar.lleft, &ar.pleft); if (err) goto out2; |
e35fd6609 ext4: Add new abs... |
3881 |
ar.lright = map->m_lblk; |
4d33b1ef1 ext4: teach ext4_... |
3882 3883 |
ex2 = NULL; err = ext4_ext_search_right(inode, path, &ar.lright, &ar.pright, &ex2); |
c9de560de ext4: Add multi b... |
3884 3885 |
if (err) goto out2; |
25d14f983 ext4: Extent over... |
3886 |
|
4d33b1ef1 ext4: teach ext4_... |
3887 3888 3889 |
/* Check if the extent after searching to the right implies a * cluster we can use. */ if ((sbi->s_cluster_ratio > 1) && ex2 && |
d8990240d ext4: add some tr... |
3890 |
get_implied_cluster_alloc(inode->i_sb, map, ex2, path)) { |
4d33b1ef1 ext4: teach ext4_... |
3891 3892 |
ar.len = allocated = map->m_len; newblock = map->m_pblk; |
7b415bf60 ext4: Fix bigallo... |
3893 |
map->m_flags |= EXT4_MAP_FROM_CLUSTER; |
4d33b1ef1 ext4: teach ext4_... |
3894 3895 |
goto got_allocated_blocks; } |
749269fac Change on-disk fo... |
3896 3897 3898 3899 3900 3901 |
/* * See if request is beyond maximum number of blocks we can have in * a single extent. For an initialized extent this limit is * EXT_INIT_MAX_LEN and for an uninitialized extent this limit is * EXT_UNINIT_MAX_LEN. */ |
e35fd6609 ext4: Add new abs... |
3902 |
if (map->m_len > EXT_INIT_MAX_LEN && |
c21770573 ext4: Define a ne... |
3903 |
!(flags & EXT4_GET_BLOCKS_UNINIT_EXT)) |
e35fd6609 ext4: Add new abs... |
3904 3905 |
map->m_len = EXT_INIT_MAX_LEN; else if (map->m_len > EXT_UNINIT_MAX_LEN && |
c21770573 ext4: Define a ne... |
3906 |
(flags & EXT4_GET_BLOCKS_UNINIT_EXT)) |
e35fd6609 ext4: Add new abs... |
3907 |
map->m_len = EXT_UNINIT_MAX_LEN; |
749269fac Change on-disk fo... |
3908 |
|
e35fd6609 ext4: Add new abs... |
3909 |
/* Check if we can really insert (m_lblk)::(m_lblk + m_len) extent */ |
e35fd6609 ext4: Add new abs... |
3910 |
newex.ee_len = cpu_to_le16(map->m_len); |
4d33b1ef1 ext4: teach ext4_... |
3911 |
err = ext4_ext_check_overlap(sbi, inode, &newex, path); |
25d14f983 ext4: Extent over... |
3912 |
if (err) |
b939e3766 ext4: Use the ext... |
3913 |
allocated = ext4_ext_get_actual_len(&newex); |
25d14f983 ext4: Extent over... |
3914 |
else |
e35fd6609 ext4: Add new abs... |
3915 |
allocated = map->m_len; |
c9de560de ext4: Add multi b... |
3916 3917 3918 |
/* allocate new block */ ar.inode = inode; |
e35fd6609 ext4: Add new abs... |
3919 3920 |
ar.goal = ext4_ext_find_goal(inode, path, map->m_lblk); ar.logical = map->m_lblk; |
4d33b1ef1 ext4: teach ext4_... |
3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 |
/* * We calculate the offset from the beginning of the cluster * for the logical block number, since when we allocate a * physical cluster, the physical block should start at the * same offset from the beginning of the cluster. This is * needed so that future calls to get_implied_cluster_alloc() * work correctly. */ offset = map->m_lblk & (sbi->s_cluster_ratio - 1); ar.len = EXT4_NUM_B2C(sbi, offset+allocated); ar.goal -= offset; ar.logical -= offset; |
c9de560de ext4: Add multi b... |
3933 3934 3935 3936 3937 |
if (S_ISREG(inode->i_mode)) ar.flags = EXT4_MB_HINT_DATA; else /* disable in-core preallocation for non-regular files */ ar.flags = 0; |
556b27abf ext4: do not norm... |
3938 3939 |
if (flags & EXT4_GET_BLOCKS_NO_NORMALIZE) ar.flags |= EXT4_MB_HINT_NOPREALLOC; |
c9de560de ext4: Add multi b... |
3940 |
newblock = ext4_mb_new_blocks(handle, &ar, &err); |
a86c61812 [PATCH] ext3: add... |
3941 3942 |
if (!newblock) goto out2; |
84fe3bef5 ext4: Compile war... |
3943 3944 |
ext_debug("allocate new block: goal %llu, found %llu/%u ", |
498e5f241 ext4: Change unsi... |
3945 |
ar.goal, newblock, allocated); |
4d33b1ef1 ext4: teach ext4_... |
3946 |
free_on_err = 1; |
7b415bf60 ext4: Fix bigallo... |
3947 |
allocated_clusters = ar.len; |
4d33b1ef1 ext4: teach ext4_... |
3948 3949 3950 |
ar.len = EXT4_C2B(sbi, ar.len) - offset; if (ar.len > allocated) ar.len = allocated; |
a86c61812 [PATCH] ext3: add... |
3951 |
|
4d33b1ef1 ext4: teach ext4_... |
3952 |
got_allocated_blocks: |
a86c61812 [PATCH] ext3: add... |
3953 |
/* try to insert new extent into found leaf and return */ |
4d33b1ef1 ext4: teach ext4_... |
3954 |
ext4_ext_store_pblock(&newex, newblock + offset); |
c9de560de ext4: Add multi b... |
3955 |
newex.ee_len = cpu_to_le16(ar.len); |
8d5d02e6b ext4: async direc... |
3956 3957 |
/* Mark uninitialized */ if (flags & EXT4_GET_BLOCKS_UNINIT_EXT){ |
a2df2a634 fallocate support... |
3958 |
ext4_ext_mark_uninitialized(&newex); |
8d5d02e6b ext4: async direc... |
3959 |
/* |
744692dc0 ext4: use ext4_ge... |
3960 |
* io_end structure was created for every IO write to an |
25985edce Fix common misspe... |
3961 |
* uninitialized extent. To avoid unnecessary conversion, |
744692dc0 ext4: use ext4_ge... |
3962 |
* here we flag the IO that really needs the conversion. |
5f5249507 ext4: skip conver... |
3963 |
* For non asycn direct IO case, flag the inode state |
25985edce Fix common misspe... |
3964 |
* that we need to perform conversion when IO is done. |
8d5d02e6b ext4: async direc... |
3965 |
*/ |
744692dc0 ext4: use ext4_ge... |
3966 |
if ((flags & EXT4_GET_BLOCKS_PRE_IO)) { |
0edeb71dc ext4: Create help... |
3967 3968 3969 |
if (io) ext4_set_io_unwritten_flag(inode, io); else |
19f5fb7ad ext4: Use bitops ... |
3970 3971 |
ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN); |
5f5249507 ext4: skip conver... |
3972 |
} |
744692dc0 ext4: use ext4_ge... |
3973 |
if (ext4_should_dioread_nolock(inode)) |
e35fd6609 ext4: Add new abs... |
3974 |
map->m_flags |= EXT4_MAP_UNINIT; |
8d5d02e6b ext4: async direc... |
3975 |
} |
c8d46e41b ext4: Add flag to... |
3976 |
|
a4e5d88b1 ext4: update EOFB... |
3977 3978 3979 3980 |
err = 0; if ((flags & EXT4_GET_BLOCKS_KEEP_SIZE) == 0) err = check_eofblocks_fl(handle, inode, map->m_lblk, path, ar.len); |
575a1d4bd ext4: free alloca... |
3981 3982 3983 |
if (!err) err = ext4_ext_insert_extent(handle, inode, path, &newex, flags); |
4d33b1ef1 ext4: teach ext4_... |
3984 |
if (err && free_on_err) { |
7132de744 ext4: fix i_block... |
3985 3986 |
int fb_flags = flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE ? EXT4_FREE_BLOCKS_NO_QUOT_UPDATE : 0; |
315054f02 When ext4_ext_ins... |
3987 |
/* free data blocks we just allocated */ |
c9de560de ext4: Add multi b... |
3988 3989 |
/* not a good idea to call discard here directly, * but otherwise we'd need to call it every free() */ |
c2ea3fde6 ext4: Remove old ... |
3990 |
ext4_discard_preallocations(inode); |
7dc576158 ext4: Fix sparse ... |
3991 |
ext4_free_blocks(handle, inode, NULL, ext4_ext_pblock(&newex), |
7132de744 ext4: fix i_block... |
3992 |
ext4_ext_get_actual_len(&newex), fb_flags); |
a86c61812 [PATCH] ext3: add... |
3993 |
goto out2; |
315054f02 When ext4_ext_ins... |
3994 |
} |
a86c61812 [PATCH] ext3: add... |
3995 |
|
a86c61812 [PATCH] ext3: add... |
3996 |
/* previous routine could use block we allocated */ |
bf89d16f6 ext4: rename {ext... |
3997 |
newblock = ext4_ext_pblock(&newex); |
b939e3766 ext4: Use the ext... |
3998 |
allocated = ext4_ext_get_actual_len(&newex); |
e35fd6609 ext4: Add new abs... |
3999 4000 4001 |
if (allocated > map->m_len) allocated = map->m_len; map->m_flags |= EXT4_MAP_NEW; |
a86c61812 [PATCH] ext3: add... |
4002 |
|
b436b9bef ext4: Wait for pr... |
4003 |
/* |
5f634d064 ext4: Fix quota a... |
4004 4005 4006 |
* Update reserved blocks/metadata blocks after successful * block allocation which had been deferred till now. */ |
7b415bf60 ext4: Fix bigallo... |
4007 |
if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) { |
81fdbb4a8 ext4: move variab... |
4008 |
unsigned int reserved_clusters; |
7b415bf60 ext4: Fix bigallo... |
4009 |
/* |
81fdbb4a8 ext4: move variab... |
4010 |
* Check how many clusters we had reserved this allocated range |
7b415bf60 ext4: Fix bigallo... |
4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 |
*/ reserved_clusters = get_reserved_cluster_alloc(inode, map->m_lblk, allocated); if (map->m_flags & EXT4_MAP_FROM_CLUSTER) { if (reserved_clusters) { /* * We have clusters reserved for this range. * But since we are not doing actual allocation * and are simply using blocks from previously * allocated cluster, we should release the * reservation and not claim quota. */ ext4_da_update_reserve_space(inode, reserved_clusters, 0); } } else { BUG_ON(allocated_clusters < reserved_clusters); /* We will claim quota for all newly allocated blocks.*/ ext4_da_update_reserve_space(inode, allocated_clusters, 1); if (reserved_clusters < allocated_clusters) { |
5356f2615 ext4: attempt to ... |
4032 |
struct ext4_inode_info *ei = EXT4_I(inode); |
7b415bf60 ext4: Fix bigallo... |
4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 |
int reservation = allocated_clusters - reserved_clusters; /* * It seems we claimed few clusters outside of * the range of this allocation. We should give * it back to the reservation pool. This can * happen in the following case: * * * Suppose s_cluster_ratio is 4 (i.e., each * cluster has 4 blocks. Thus, the clusters * are [0-3],[4-7],[8-11]... * * First comes delayed allocation write for * logical blocks 10 & 11. Since there were no * previous delayed allocated blocks in the * range [8-11], we would reserve 1 cluster * for this write. * * Next comes write for logical blocks 3 to 8. * In this case, we will reserve 2 clusters * (for [0-3] and [4-7]; and not for [8-11] as * that range has a delayed allocated blocks. * Thus total reserved clusters now becomes 3. * * Now, during the delayed allocation writeout * time, we will first write blocks [3-8] and * allocate 3 clusters for writing these * blocks. Also, we would claim all these * three clusters above. * * Now when we come here to writeout the * blocks [10-11], we would expect to claim * the reservation of 1 cluster we had made * (and we would claim it since there are no * more delayed allocated blocks in the range * [8-11]. But our reserved cluster count had * already gone to 0. * * Thus, at the step 4 above when we determine * that there are still some unwritten delayed * allocated blocks outside of our current * block range, we should increment the * reserved clusters count so that when the * remaining blocks finally gets written, we * could claim them. */ |
5356f2615 ext4: attempt to ... |
4075 4076 4077 4078 4079 |
dquot_reserve_block(inode, EXT4_C2B(sbi, reservation)); spin_lock(&ei->i_block_reservation_lock); ei->i_reserved_data_blocks += reservation; spin_unlock(&ei->i_block_reservation_lock); |
7b415bf60 ext4: Fix bigallo... |
4080 4081 4082 |
} } } |
5f634d064 ext4: Fix quota a... |
4083 4084 |
/* |
b436b9bef ext4: Wait for pr... |
4085 4086 4087 4088 |
* Cache the extent and update transaction to commit on fdatasync only * when it is _not_ an uninitialized extent. */ if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) { |
b05e6ae58 ext4: drop ec_typ... |
4089 |
ext4_ext_put_in_cache(inode, map->m_lblk, allocated, newblock); |
b436b9bef ext4: Wait for pr... |
4090 4091 4092 |
ext4_update_inode_fsync_trans(handle, inode, 1); } else ext4_update_inode_fsync_trans(handle, inode, 0); |
a86c61812 [PATCH] ext3: add... |
4093 |
out: |
e35fd6609 ext4: Add new abs... |
4094 4095 |
if (allocated > map->m_len) allocated = map->m_len; |
a86c61812 [PATCH] ext3: add... |
4096 |
ext4_ext_show_leaf(inode, path); |
e35fd6609 ext4: Add new abs... |
4097 4098 4099 |
map->m_flags |= EXT4_MAP_MAPPED; map->m_pblk = newblock; map->m_len = allocated; |
a86c61812 [PATCH] ext3: add... |
4100 4101 4102 4103 4104 |
out2: if (path) { ext4_ext_drop_refs(path); kfree(path); } |
e861304b8 ext4: add "punch ... |
4105 4106 |
result = (flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) ? punched_out : allocated; |
e7b319e39 ext4: trace punch... |
4107 4108 |
trace_ext4_ext_map_blocks_exit(inode, map->m_lblk, newblock, map->m_len, err ? err : result); |
e861304b8 ext4: add "punch ... |
4109 |
return err ? err : result; |
a86c61812 [PATCH] ext3: add... |
4110 |
} |
cf108bca4 ext4: Invert the ... |
4111 |
void ext4_ext_truncate(struct inode *inode) |
a86c61812 [PATCH] ext3: add... |
4112 4113 4114 |
{ struct address_space *mapping = inode->i_mapping; struct super_block *sb = inode->i_sb; |
725d26d3f ext4: Introduce e... |
4115 |
ext4_lblk_t last_block; |
a86c61812 [PATCH] ext3: add... |
4116 |
handle_t *handle; |
189e868fa ext4: fix fsx tru... |
4117 |
loff_t page_len; |
a86c61812 [PATCH] ext3: add... |
4118 4119 4120 |
int err = 0; /* |
3889fd57e ext4: flush the i... |
4121 4122 4123 4124 4125 4126 |
* finish any pending end_io work so we won't run the risk of * converting any truncated blocks to initialized later */ ext4_flush_completed_IO(inode); /* |
a86c61812 [PATCH] ext3: add... |
4127 4128 |
* probably first extent we're gonna free will be last in block */ |
f3bd1f3fa ext4: journal cre... |
4129 |
err = ext4_writepage_trans_blocks(inode); |
a86c61812 [PATCH] ext3: add... |
4130 |
handle = ext4_journal_start(inode, err); |
cf108bca4 ext4: Invert the ... |
4131 |
if (IS_ERR(handle)) |
a86c61812 [PATCH] ext3: add... |
4132 |
return; |
a86c61812 [PATCH] ext3: add... |
4133 |
|
189e868fa ext4: fix fsx tru... |
4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 |
if (inode->i_size % PAGE_CACHE_SIZE != 0) { page_len = PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)); err = ext4_discard_partial_page_buffers(handle, mapping, inode->i_size, page_len, 0); if (err) goto out_stop; } |
a86c61812 [PATCH] ext3: add... |
4144 |
|
9ddfc3dc7 ext4: Fix lock in... |
4145 4146 |
if (ext4_orphan_add(handle, inode)) goto out_stop; |
0e855ac8b ext4: Convert tru... |
4147 |
down_write(&EXT4_I(inode)->i_data_sem); |
a86c61812 [PATCH] ext3: add... |
4148 |
ext4_ext_invalidate_cache(inode); |
c2ea3fde6 ext4: Remove old ... |
4149 |
ext4_discard_preallocations(inode); |
c9de560de ext4: Add multi b... |
4150 |
|
a86c61812 [PATCH] ext3: add... |
4151 |
/* |
d0d856e8b [PATCH] ext4: cle... |
4152 4153 4154 |
* TODO: optimization is possible here. * Probably we need not scan at all, * because page truncation is enough. |
a86c61812 [PATCH] ext3: add... |
4155 |
*/ |
a86c61812 [PATCH] ext3: add... |
4156 4157 4158 4159 4160 4161 4162 |
/* we have to know where to truncate from in crash case */ EXT4_I(inode)->i_disksize = inode->i_size; ext4_mark_inode_dirty(handle, inode); last_block = (inode->i_size + sb->s_blocksize - 1) >> EXT4_BLOCK_SIZE_BITS(sb); |
c6a0371cb ext4: remove unne... |
4163 |
err = ext4_ext_remove_space(inode, last_block); |
a86c61812 [PATCH] ext3: add... |
4164 4165 |
/* In a multi-transaction truncate, we only make the final |
56055d3ae write support for... |
4166 4167 |
* transaction synchronous. */ |
a86c61812 [PATCH] ext3: add... |
4168 |
if (IS_SYNC(inode)) |
0390131ba ext4: Allow ext4 ... |
4169 |
ext4_handle_sync(handle); |
a86c61812 [PATCH] ext3: add... |
4170 |
|
9ddfc3dc7 ext4: Fix lock in... |
4171 |
up_write(&EXT4_I(inode)->i_data_sem); |
f6d2f6b32 ext4: fix unbalan... |
4172 4173 |
out_stop: |
a86c61812 [PATCH] ext3: add... |
4174 |
/* |
d0d856e8b [PATCH] ext4: cle... |
4175 |
* If this was a simple ftruncate() and the file will remain alive, |
a86c61812 [PATCH] ext3: add... |
4176 4177 4178 4179 4180 4181 4182 |
* then we need to clear up the orphan record which we created above. * However, if this was a real unlink then we were called by * ext4_delete_inode(), and we allow that function to clean up the * orphan info for us. */ if (inode->i_nlink) ext4_orphan_del(handle, inode); |
ef7377289 ext4: update ctim... |
4183 4184 |
inode->i_mtime = inode->i_ctime = ext4_current_time(inode); ext4_mark_inode_dirty(handle, inode); |
a86c61812 [PATCH] ext3: add... |
4185 4186 |
ext4_journal_stop(handle); } |
fd28784ad ext4: Fix falloca... |
4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 |
static void ext4_falloc_update_inode(struct inode *inode, int mode, loff_t new_size, int update_ctime) { struct timespec now; if (update_ctime) { now = current_fs_time(inode->i_sb); if (!timespec_equal(&inode->i_ctime, &now)) inode->i_ctime = now; } /* * Update only when preallocation was requested beyond * the file size. */ |
cf17fea65 ext4: Properly up... |
4201 4202 4203 4204 4205 |
if (!(mode & FALLOC_FL_KEEP_SIZE)) { if (new_size > i_size_read(inode)) i_size_write(inode, new_size); if (new_size > EXT4_I(inode)->i_disksize) ext4_update_i_disksize(inode, new_size); |
c8d46e41b ext4: Add flag to... |
4206 4207 4208 4209 4210 4211 |
} else { /* * Mark that we allocate beyond EOF so the subsequent truncate * can proceed even if the new size is the same as i_size. */ if (new_size > i_size_read(inode)) |
12e9b8920 ext4: Use bitops ... |
4212 |
ext4_set_inode_flag(inode, EXT4_INODE_EOFBLOCKS); |
fd28784ad ext4: Fix falloca... |
4213 4214 4215 |
} } |
a2df2a634 fallocate support... |
4216 |
/* |
2fe17c107 fallocate should ... |
4217 |
* preallocate space for a file. This implements ext4's fallocate file |
a2df2a634 fallocate support... |
4218 4219 4220 4221 4222 |
* operation, which gets called from sys_fallocate system call. * For block-mapped files, posix_fallocate should fall back to the method * of writing zeroes to the required new blocks (the same behavior which is * expected for file systems which do not support fallocate() system call). */ |
2fe17c107 fallocate should ... |
4223 |
long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) |
a2df2a634 fallocate support... |
4224 |
{ |
2fe17c107 fallocate should ... |
4225 |
struct inode *inode = file->f_path.dentry->d_inode; |
a2df2a634 fallocate support... |
4226 |
handle_t *handle; |
fd28784ad ext4: Fix falloca... |
4227 |
loff_t new_size; |
498e5f241 ext4: Change unsi... |
4228 |
unsigned int max_blocks; |
a2df2a634 fallocate support... |
4229 4230 4231 |
int ret = 0; int ret2 = 0; int retries = 0; |
a4e5d88b1 ext4: update EOFB... |
4232 |
int flags; |
2ed886852 ext4: Convert cal... |
4233 |
struct ext4_map_blocks map; |
a2df2a634 fallocate support... |
4234 4235 4236 4237 4238 4239 |
unsigned int credits, blkbits = inode->i_blkbits; /* * currently supporting (pre)allocate mode for extent-based * files _only_ */ |
12e9b8920 ext4: Use bitops ... |
4240 |
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) |
a2df2a634 fallocate support... |
4241 |
return -EOPNOTSUPP; |
a4bb6b64e ext4: enable "pun... |
4242 4243 4244 4245 4246 4247 |
/* Return error if mode is not supported */ if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; if (mode & FALLOC_FL_PUNCH_HOLE) return ext4_punch_hole(file, offset, len); |
0562e0bad ext4: add more tr... |
4248 |
trace_ext4_fallocate_enter(inode, offset, len, mode); |
2ed886852 ext4: Convert cal... |
4249 |
map.m_lblk = offset >> blkbits; |
fd28784ad ext4: Fix falloca... |
4250 4251 4252 4253 |
/* * We can't just convert len to max_blocks because * If blocksize = 4096 offset = 3072 and len = 2048 */ |
a2df2a634 fallocate support... |
4254 |
max_blocks = (EXT4_BLOCK_ALIGN(len + offset, blkbits) >> blkbits) |
2ed886852 ext4: Convert cal... |
4255 |
- map.m_lblk; |
a2df2a634 fallocate support... |
4256 |
/* |
f3bd1f3fa ext4: journal cre... |
4257 |
* credits to insert 1 extent into extent tree |
a2df2a634 fallocate support... |
4258 |
*/ |
f3bd1f3fa ext4: journal cre... |
4259 |
credits = ext4_chunk_trans_blocks(inode, max_blocks); |
55bd725aa ext4: Fix locking... |
4260 |
mutex_lock(&inode->i_mutex); |
6d19c42b7 ext4: Prevent cre... |
4261 4262 4263 |
ret = inode_newsize_ok(inode, (len + offset)); if (ret) { mutex_unlock(&inode->i_mutex); |
0562e0bad ext4: add more tr... |
4264 |
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret); |
6d19c42b7 ext4: Prevent cre... |
4265 4266 |
return ret; } |
3c6fe7701 ext4: Don't norma... |
4267 |
flags = EXT4_GET_BLOCKS_CREATE_UNINIT_EXT; |
a4e5d88b1 ext4: update EOFB... |
4268 4269 |
if (mode & FALLOC_FL_KEEP_SIZE) flags |= EXT4_GET_BLOCKS_KEEP_SIZE; |
3c6fe7701 ext4: Don't norma... |
4270 4271 4272 4273 4274 4275 4276 |
/* * Don't normalize the request if it can fit in one extent so * that it doesn't get unnecessarily split into multiple * extents. */ if (len <= EXT_UNINIT_MAX_LEN << blkbits) flags |= EXT4_GET_BLOCKS_NO_NORMALIZE; |
a2df2a634 fallocate support... |
4277 4278 |
retry: while (ret >= 0 && ret < max_blocks) { |
2ed886852 ext4: Convert cal... |
4279 4280 |
map.m_lblk = map.m_lblk + ret; map.m_len = max_blocks = max_blocks - ret; |
a2df2a634 fallocate support... |
4281 4282 4283 4284 4285 |
handle = ext4_journal_start(inode, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); break; } |
a4e5d88b1 ext4: update EOFB... |
4286 |
ret = ext4_map_blocks(handle, inode, &map, flags); |
221879c92 ext4: Check for t... |
4287 |
if (ret <= 0) { |
2c98615d3 ext4: Don't mark ... |
4288 4289 |
#ifdef EXT4FS_DEBUG WARN_ON(ret <= 0); |
e35fd6609 ext4: Add new abs... |
4290 |
printk(KERN_ERR "%s: ext4_ext_map_blocks " |
2c98615d3 ext4: Don't mark ... |
4291 |
"returned error inode#%lu, block=%u, " |
9fd9784c9 ext4: Fix buildin... |
4292 |
"max_blocks=%u", __func__, |
a6371b636 ext4: fix compile... |
4293 |
inode->i_ino, map.m_lblk, max_blocks); |
2c98615d3 ext4: Don't mark ... |
4294 |
#endif |
a2df2a634 fallocate support... |
4295 4296 4297 4298 |
ext4_mark_inode_dirty(handle, inode); ret2 = ext4_journal_stop(handle); break; } |
2ed886852 ext4: Convert cal... |
4299 |
if ((map.m_lblk + ret) >= (EXT4_BLOCK_ALIGN(offset + len, |
fd28784ad ext4: Fix falloca... |
4300 4301 4302 |
blkbits) >> blkbits)) new_size = offset + len; else |
29ae07b70 ext4: Fix overflo... |
4303 |
new_size = ((loff_t) map.m_lblk + ret) << blkbits; |
a2df2a634 fallocate support... |
4304 |
|
fd28784ad ext4: Fix falloca... |
4305 |
ext4_falloc_update_inode(inode, mode, new_size, |
2ed886852 ext4: Convert cal... |
4306 |
(map.m_flags & EXT4_MAP_NEW)); |
a2df2a634 fallocate support... |
4307 4308 4309 4310 4311 |
ext4_mark_inode_dirty(handle, inode); ret2 = ext4_journal_stop(handle); if (ret2) break; } |
fd28784ad ext4: Fix falloca... |
4312 4313 4314 |
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) { ret = 0; |
a2df2a634 fallocate support... |
4315 |
goto retry; |
a2df2a634 fallocate support... |
4316 |
} |
55bd725aa ext4: Fix locking... |
4317 |
mutex_unlock(&inode->i_mutex); |
0562e0bad ext4: add more tr... |
4318 4319 |
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret > 0 ? ret2 : ret); |
a2df2a634 fallocate support... |
4320 4321 |
return ret > 0 ? ret2 : ret; } |
6873fa0de Hook ext4 to the ... |
4322 4323 |
/* |
0031462b5 ext4: Split unini... |
4324 4325 4326 4327 4328 4329 4330 |
* This function convert a range of blocks to written extents * The caller of this function will pass the start offset and the size. * all unwritten extents within this range will be converted to * written extents. * * This function is called from the direct IO end io call back * function, to convert the fallocated extents after IO is completed. |
109f55651 ext4: fix ext4_ex... |
4331 |
* Returns 0 on success. |
0031462b5 ext4: Split unini... |
4332 4333 |
*/ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset, |
a1de02dcc ext4: fix async i... |
4334 |
ssize_t len) |
0031462b5 ext4: Split unini... |
4335 4336 |
{ handle_t *handle; |
0031462b5 ext4: Split unini... |
4337 4338 4339 |
unsigned int max_blocks; int ret = 0; int ret2 = 0; |
2ed886852 ext4: Convert cal... |
4340 |
struct ext4_map_blocks map; |
0031462b5 ext4: Split unini... |
4341 |
unsigned int credits, blkbits = inode->i_blkbits; |
2ed886852 ext4: Convert cal... |
4342 |
map.m_lblk = offset >> blkbits; |
0031462b5 ext4: Split unini... |
4343 4344 4345 4346 |
/* * We can't just convert len to max_blocks because * If blocksize = 4096 offset = 3072 and len = 2048 */ |
2ed886852 ext4: Convert cal... |
4347 4348 |
max_blocks = ((EXT4_BLOCK_ALIGN(len + offset, blkbits) >> blkbits) - map.m_lblk); |
0031462b5 ext4: Split unini... |
4349 4350 4351 4352 4353 |
/* * credits to insert 1 extent into extent tree */ credits = ext4_chunk_trans_blocks(inode, max_blocks); while (ret >= 0 && ret < max_blocks) { |
2ed886852 ext4: Convert cal... |
4354 4355 |
map.m_lblk += ret; map.m_len = (max_blocks -= ret); |
0031462b5 ext4: Split unini... |
4356 4357 4358 4359 4360 |
handle = ext4_journal_start(inode, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); break; } |
2ed886852 ext4: Convert cal... |
4361 |
ret = ext4_map_blocks(handle, inode, &map, |
c7064ef13 ext4: mechanical ... |
4362 |
EXT4_GET_BLOCKS_IO_CONVERT_EXT); |
0031462b5 ext4: Split unini... |
4363 4364 |
if (ret <= 0) { WARN_ON(ret <= 0); |
e35fd6609 ext4: Add new abs... |
4365 |
printk(KERN_ERR "%s: ext4_ext_map_blocks " |
0031462b5 ext4: Split unini... |
4366 4367 |
"returned error inode#%lu, block=%u, " "max_blocks=%u", __func__, |
2ed886852 ext4: Convert cal... |
4368 |
inode->i_ino, map.m_lblk, map.m_len); |
0031462b5 ext4: Split unini... |
4369 4370 4371 4372 4373 4374 4375 4376 |
} ext4_mark_inode_dirty(handle, inode); ret2 = ext4_journal_stop(handle); if (ret <= 0 || ret2 ) break; } return ret > 0 ? ret2 : ret; } |
6d9c85eb7 ext4: make FIEMAP... |
4377 |
|
0031462b5 ext4: Split unini... |
4378 |
/* |
6873fa0de Hook ext4 to the ... |
4379 4380 |
* Callback function called for each extent to gather FIEMAP information. */ |
c03f8aa9a ext4: use FIEMAP_... |
4381 |
static int ext4_ext_fiemap_cb(struct inode *inode, ext4_lblk_t next, |
6873fa0de Hook ext4 to the ... |
4382 4383 4384 |
struct ext4_ext_cache *newex, struct ext4_extent *ex, void *data) { |
6873fa0de Hook ext4 to the ... |
4385 4386 4387 4388 |
__u64 logical; __u64 physical; __u64 length; __u32 flags = 0; |
6d9c85eb7 ext4: make FIEMAP... |
4389 4390 4391 |
int ret = 0; struct fiemap_extent_info *fieinfo = data; unsigned char blksize_bits; |
6873fa0de Hook ext4 to the ... |
4392 |
|
6d9c85eb7 ext4: make FIEMAP... |
4393 4394 |
blksize_bits = inode->i_sb->s_blocksize_bits; logical = (__u64)newex->ec_block << blksize_bits; |
6873fa0de Hook ext4 to the ... |
4395 |
|
b05e6ae58 ext4: drop ec_typ... |
4396 |
if (newex->ec_start == 0) { |
6d9c85eb7 ext4: make FIEMAP... |
4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 |
/* * No extent in extent-tree contains block @newex->ec_start, * then the block may stay in 1)a hole or 2)delayed-extent. * * Holes or delayed-extents are processed as follows. * 1. lookup dirty pages with specified range in pagecache. * If no page is got, then there is no delayed-extent and * return with EXT_CONTINUE. * 2. find the 1st mapped buffer, * 3. check if the mapped buffer is both in the request range * and a delayed buffer. If not, there is no delayed-extent, * then return. * 4. a delayed-extent is found, the extent will be collected. */ ext4_lblk_t end = 0; pgoff_t last_offset; pgoff_t offset; pgoff_t index; |
b221349fa ext4: fix ext4_ex... |
4415 |
pgoff_t start_index = 0; |
6d9c85eb7 ext4: make FIEMAP... |
4416 |
struct page **pages = NULL; |
6873fa0de Hook ext4 to the ... |
4417 |
struct buffer_head *bh = NULL; |
6d9c85eb7 ext4: make FIEMAP... |
4418 4419 4420 4421 4422 4423 |
struct buffer_head *head = NULL; unsigned int nr_pages = PAGE_SIZE / sizeof(struct page *); pages = kmalloc(PAGE_SIZE, GFP_KERNEL); if (pages == NULL) return -ENOMEM; |
6873fa0de Hook ext4 to the ... |
4424 4425 |
offset = logical >> PAGE_SHIFT; |
6d9c85eb7 ext4: make FIEMAP... |
4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 |
repeat: last_offset = offset; head = NULL; ret = find_get_pages_tag(inode->i_mapping, &offset, PAGECACHE_TAG_DIRTY, nr_pages, pages); if (!(flags & FIEMAP_EXTENT_DELALLOC)) { /* First time, try to find a mapped buffer. */ if (ret == 0) { out: for (index = 0; index < ret; index++) page_cache_release(pages[index]); /* just a hole. */ kfree(pages); return EXT_CONTINUE; } |
b221349fa ext4: fix ext4_ex... |
4442 |
index = 0; |
6873fa0de Hook ext4 to the ... |
4443 |
|
b221349fa ext4: fix ext4_ex... |
4444 |
next_page: |
6d9c85eb7 ext4: make FIEMAP... |
4445 |
/* Try to find the 1st mapped buffer. */ |
b221349fa ext4: fix ext4_ex... |
4446 |
end = ((__u64)pages[index]->index << PAGE_SHIFT) >> |
6d9c85eb7 ext4: make FIEMAP... |
4447 |
blksize_bits; |
b221349fa ext4: fix ext4_ex... |
4448 |
if (!page_has_buffers(pages[index])) |
6d9c85eb7 ext4: make FIEMAP... |
4449 |
goto out; |
b221349fa ext4: fix ext4_ex... |
4450 |
head = page_buffers(pages[index]); |
6d9c85eb7 ext4: make FIEMAP... |
4451 4452 |
if (!head) goto out; |
6873fa0de Hook ext4 to the ... |
4453 |
|
b221349fa ext4: fix ext4_ex... |
4454 |
index++; |
6d9c85eb7 ext4: make FIEMAP... |
4455 4456 |
bh = head; do { |
b221349fa ext4: fix ext4_ex... |
4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 |
if (end >= newex->ec_block + newex->ec_len) /* The buffer is out of * the request range. */ goto out; if (buffer_mapped(bh) && end >= newex->ec_block) { start_index = index - 1; |
6d9c85eb7 ext4: make FIEMAP... |
4467 |
/* get the 1st mapped buffer. */ |
6d9c85eb7 ext4: make FIEMAP... |
4468 4469 |
goto found_mapped_buffer; } |
b221349fa ext4: fix ext4_ex... |
4470 |
|
6d9c85eb7 ext4: make FIEMAP... |
4471 4472 4473 |
bh = bh->b_this_page; end++; } while (bh != head); |
6873fa0de Hook ext4 to the ... |
4474 |
|
b221349fa ext4: fix ext4_ex... |
4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 |
/* No mapped buffer in the range found in this page, * We need to look up next page. */ if (index >= ret) { /* There is no page left, but we need to limit * newex->ec_len. */ newex->ec_len = end - newex->ec_block; goto out; } goto next_page; |
6873fa0de Hook ext4 to the ... |
4486 |
} else { |
6d9c85eb7 ext4: make FIEMAP... |
4487 4488 4489 4490 |
/*Find contiguous delayed buffers. */ if (ret > 0 && pages[0]->index == last_offset) head = page_buffers(pages[0]); bh = head; |
b221349fa ext4: fix ext4_ex... |
4491 4492 |
index = 1; start_index = 0; |
6873fa0de Hook ext4 to the ... |
4493 |
} |
6d9c85eb7 ext4: make FIEMAP... |
4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 |
found_mapped_buffer: if (bh != NULL && buffer_delay(bh)) { /* 1st or contiguous delayed buffer found. */ if (!(flags & FIEMAP_EXTENT_DELALLOC)) { /* * 1st delayed buffer found, record * the start of extent. */ flags |= FIEMAP_EXTENT_DELALLOC; newex->ec_block = end; logical = (__u64)end << blksize_bits; } /* Find contiguous delayed buffers. */ do { if (!buffer_delay(bh)) goto found_delayed_extent; bh = bh->b_this_page; end++; } while (bh != head); |
b221349fa ext4: fix ext4_ex... |
4514 |
for (; index < ret; index++) { |
6d9c85eb7 ext4: make FIEMAP... |
4515 4516 4517 4518 4519 4520 4521 4522 4523 |
if (!page_has_buffers(pages[index])) { bh = NULL; break; } head = page_buffers(pages[index]); if (!head) { bh = NULL; break; } |
b221349fa ext4: fix ext4_ex... |
4524 |
|
6d9c85eb7 ext4: make FIEMAP... |
4525 |
if (pages[index]->index != |
b221349fa ext4: fix ext4_ex... |
4526 4527 |
pages[start_index]->index + index - start_index) { |
6d9c85eb7 ext4: make FIEMAP... |
4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 |
/* Blocks are not contiguous. */ bh = NULL; break; } bh = head; do { if (!buffer_delay(bh)) /* Delayed-extent ends. */ goto found_delayed_extent; bh = bh->b_this_page; end++; } while (bh != head); } } else if (!(flags & FIEMAP_EXTENT_DELALLOC)) /* a hole found. */ goto out; found_delayed_extent: newex->ec_len = min(end - newex->ec_block, (ext4_lblk_t)EXT_INIT_MAX_LEN); if (ret == nr_pages && bh != NULL && newex->ec_len < EXT_INIT_MAX_LEN && buffer_delay(bh)) { /* Have not collected an extent and continue. */ for (index = 0; index < ret; index++) page_cache_release(pages[index]); goto repeat; |
6873fa0de Hook ext4 to the ... |
4555 |
} |
6d9c85eb7 ext4: make FIEMAP... |
4556 4557 4558 4559 |
for (index = 0; index < ret; index++) page_cache_release(pages[index]); kfree(pages); |
6873fa0de Hook ext4 to the ... |
4560 4561 4562 4563 4564 4565 4566 |
} physical = (__u64)newex->ec_start << blksize_bits; length = (__u64)newex->ec_len << blksize_bits; if (ex && ext4_ext_is_uninitialized(ex)) flags |= FIEMAP_EXTENT_UNWRITTEN; |
c03f8aa9a ext4: use FIEMAP_... |
4567 |
if (next == EXT_MAX_BLOCKS) |
6873fa0de Hook ext4 to the ... |
4568 |
flags |= FIEMAP_EXTENT_LAST; |
6d9c85eb7 ext4: make FIEMAP... |
4569 |
ret = fiemap_fill_next_extent(fieinfo, logical, physical, |
6873fa0de Hook ext4 to the ... |
4570 |
length, flags); |
6d9c85eb7 ext4: make FIEMAP... |
4571 4572 4573 |
if (ret < 0) return ret; if (ret == 1) |
6873fa0de Hook ext4 to the ... |
4574 |
return EXT_BREAK; |
6873fa0de Hook ext4 to the ... |
4575 4576 |
return EXT_CONTINUE; } |
6873fa0de Hook ext4 to the ... |
4577 4578 |
/* fiemap flags we can handle specified here */ #define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
3a06d778d ext4: sparse fixes |
4579 4580 |
static int ext4_xattr_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo) |
6873fa0de Hook ext4 to the ... |
4581 4582 4583 4584 4585 4586 4587 4588 |
{ __u64 physical = 0; __u64 length; __u32 flags = FIEMAP_EXTENT_LAST; int blockbits = inode->i_sb->s_blocksize_bits; int error = 0; /* in-inode? */ |
19f5fb7ad ext4: Use bitops ... |
4589 |
if (ext4_test_inode_state(inode, EXT4_STATE_XATTR)) { |
6873fa0de Hook ext4 to the ... |
4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 |
struct ext4_iloc iloc; int offset; /* offset of xattr in inode */ error = ext4_get_inode_loc(inode, &iloc); if (error) return error; physical = iloc.bh->b_blocknr << blockbits; offset = EXT4_GOOD_OLD_INODE_SIZE + EXT4_I(inode)->i_extra_isize; physical += offset; length = EXT4_SB(inode->i_sb)->s_inode_size - offset; flags |= FIEMAP_EXTENT_DATA_INLINE; |
fd2dd9fba ext4: Fix buffer ... |
4602 |
brelse(iloc.bh); |
6873fa0de Hook ext4 to the ... |
4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 |
} else { /* external block */ physical = EXT4_I(inode)->i_file_acl << blockbits; length = inode->i_sb->s_blocksize; } if (physical) error = fiemap_fill_next_extent(fieinfo, 0, physical, length, flags); return (error < 0 ? error : 0); } |
a4bb6b64e ext4: enable "pun... |
4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 |
/* * ext4_ext_punch_hole * * Punches a hole of "length" bytes in a file starting * at byte "offset" * * @inode: The inode of the file to punch a hole in * @offset: The starting byte offset of the hole * @length: The length of the hole * * Returns the number of blocks removed or negative on err */ int ext4_ext_punch_hole(struct file *file, loff_t offset, loff_t length) { struct inode *inode = file->f_path.dentry->d_inode; struct super_block *sb = inode->i_sb; struct ext4_ext_cache cache_ex; ext4_lblk_t first_block, last_block, num_blocks, iblock, max_blocks; struct address_space *mapping = inode->i_mapping; struct ext4_map_blocks map; handle_t *handle; |
ba06208a1 ext4: fix xfstest... |
4634 4635 |
loff_t first_page, last_page, page_len; loff_t first_page_offset, last_page_offset; |
a4bb6b64e ext4: enable "pun... |
4636 |
int ret, credits, blocks_released, err = 0; |
2be4751b2 ext4: fix 2nd xfs... |
4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 |
/* No need to punch hole beyond i_size */ if (offset >= inode->i_size) return 0; /* * If the hole extends beyond i_size, set the hole * to end after the page that contains i_size */ if (offset + length > inode->i_size) { length = inode->i_size + PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)) - offset; } |
a4bb6b64e ext4: enable "pun... |
4650 4651 4652 |
first_block = (offset + sb->s_blocksize - 1) >> EXT4_BLOCK_SIZE_BITS(sb); last_block = (offset + length) >> EXT4_BLOCK_SIZE_BITS(sb); |
a4bb6b64e ext4: enable "pun... |
4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 |
first_page = (offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; last_page = (offset + length) >> PAGE_CACHE_SHIFT; first_page_offset = first_page << PAGE_CACHE_SHIFT; last_page_offset = last_page << PAGE_CACHE_SHIFT; /* * Write out all dirty pages to avoid race conditions * Then release them. */ if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) { err = filemap_write_and_wait_range(mapping, |
2be4751b2 ext4: fix 2nd xfs... |
4665 |
offset, offset + length - 1); |
a4bb6b64e ext4: enable "pun... |
4666 |
|
2be4751b2 ext4: fix 2nd xfs... |
4667 4668 |
if (err) return err; |
a4bb6b64e ext4: enable "pun... |
4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 |
} /* Now release the pages */ if (last_page_offset > first_page_offset) { truncate_inode_pages_range(mapping, first_page_offset, last_page_offset-1); } /* finish any pending end_io work */ ext4_flush_completed_IO(inode); credits = ext4_writepage_trans_blocks(inode); handle = ext4_journal_start(inode, credits); if (IS_ERR(handle)) return PTR_ERR(handle); err = ext4_orphan_add(handle, inode); if (err) goto out; /* |
ba06208a1 ext4: fix xfstest... |
4690 4691 4692 4693 |
* Now we need to zero out the non-page-aligned data in the * pages at the start and tail of the hole, and unmap the buffer * heads for the block aligned regions of the page that were * completely zeroed. |
a4bb6b64e ext4: enable "pun... |
4694 |
*/ |
ba06208a1 ext4: fix xfstest... |
4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 |
if (first_page > last_page) { /* * If the file space being truncated is contained within a page * just zero out and unmap the middle of that page */ err = ext4_discard_partial_page_buffers(handle, mapping, offset, length, 0); if (err) goto out; } else { /* * zero out and unmap the partial page that contains * the start of the hole */ page_len = first_page_offset - offset; if (page_len > 0) { err = ext4_discard_partial_page_buffers(handle, mapping, offset, page_len, 0); if (err) goto out; } /* * zero out and unmap the partial page that contains * the end of the hole */ page_len = offset + length - last_page_offset; if (page_len > 0) { err = ext4_discard_partial_page_buffers(handle, mapping, last_page_offset, page_len, 0); if (err) goto out; |
a4bb6b64e ext4: enable "pun... |
4728 4729 |
} } |
2be4751b2 ext4: fix 2nd xfs... |
4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 |
/* * If i_size is contained in the last page, we need to * unmap and zero the partial page after i_size */ if (inode->i_size >> PAGE_CACHE_SHIFT == last_page && inode->i_size % PAGE_CACHE_SIZE != 0) { page_len = PAGE_CACHE_SIZE - (inode->i_size & (PAGE_CACHE_SIZE - 1)); if (page_len > 0) { err = ext4_discard_partial_page_buffers(handle, mapping, inode->i_size, page_len, 0); if (err) goto out; } } |
a4bb6b64e ext4: enable "pun... |
4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 |
/* If there are no blocks to remove, return now */ if (first_block >= last_block) goto out; down_write(&EXT4_I(inode)->i_data_sem); ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); /* * Loop over all the blocks and identify blocks * that need to be punched out */ iblock = first_block; blocks_released = 0; while (iblock < last_block) { max_blocks = last_block - iblock; num_blocks = 1; memset(&map, 0, sizeof(map)); map.m_lblk = iblock; map.m_len = max_blocks; ret = ext4_ext_map_blocks(handle, inode, &map, EXT4_GET_BLOCKS_PUNCH_OUT_EXT); if (ret > 0) { blocks_released += ret; num_blocks = ret; } else if (ret == 0) { /* * If map blocks could not find the block, * then it is in a hole. If the hole was * not already cached, then map blocks should * put it in the cache. So we can get the hole * out of the cache */ memset(&cache_ex, 0, sizeof(cache_ex)); if ((ext4_ext_check_cache(inode, iblock, &cache_ex)) && !cache_ex.ec_start) { /* The hole is cached */ num_blocks = cache_ex.ec_block + cache_ex.ec_len - iblock; } else { /* The block could not be identified */ err = -EIO; break; } } else { /* Map blocks error */ err = ret; break; } if (num_blocks == 0) { /* This condition should never happen */ ext_debug("Block lookup failed"); err = -EIO; break; } iblock += num_blocks; } if (blocks_released > 0) { ext4_ext_invalidate_cache(inode); ext4_discard_preallocations(inode); } if (IS_SYNC(inode)) ext4_handle_sync(handle); up_write(&EXT4_I(inode)->i_data_sem); out: ext4_orphan_del(handle, inode); inode->i_mtime = inode->i_ctime = ext4_current_time(inode); ext4_mark_inode_dirty(handle, inode); ext4_journal_stop(handle); return err; } |
6873fa0de Hook ext4 to the ... |
4829 4830 4831 4832 |
int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { ext4_lblk_t start_blk; |
6873fa0de Hook ext4 to the ... |
4833 4834 4835 |
int error = 0; /* fallback to generic here if not in extents fmt */ |
12e9b8920 ext4: Use bitops ... |
4836 |
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) |
6873fa0de Hook ext4 to the ... |
4837 4838 4839 4840 4841 4842 4843 4844 4845 |
return generic_block_fiemap(inode, fieinfo, start, len, ext4_get_block); if (fiemap_check_flags(fieinfo, EXT4_FIEMAP_FLAGS)) return -EBADR; if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { error = ext4_xattr_fiemap(inode, fieinfo); } else { |
aca92ff6f ext4: correctly c... |
4846 4847 |
ext4_lblk_t len_blks; __u64 last_blk; |
6873fa0de Hook ext4 to the ... |
4848 |
start_blk = start >> inode->i_sb->s_blocksize_bits; |
aca92ff6f ext4: correctly c... |
4849 |
last_blk = (start + len - 1) >> inode->i_sb->s_blocksize_bits; |
f17722f91 ext4: Fix max fil... |
4850 4851 |
if (last_blk >= EXT_MAX_BLOCKS) last_blk = EXT_MAX_BLOCKS-1; |
aca92ff6f ext4: correctly c... |
4852 |
len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1; |
6873fa0de Hook ext4 to the ... |
4853 4854 4855 4856 4857 |
/* * Walk the extent tree gathering extent information. * ext4_ext_fiemap_cb will push extents back to user. */ |
6873fa0de Hook ext4 to the ... |
4858 4859 |
error = ext4_ext_walk_space(inode, start_blk, len_blks, ext4_ext_fiemap_cb, fieinfo); |
6873fa0de Hook ext4 to the ... |
4860 4861 4862 4863 |
} return error; } |