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fs/nilfs2/inode.c
29.5 KB
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/* * inode.c - NILFS inode operations. * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Written by Ryusuke Konishi <ryusuke@osrg.net> * */ #include <linux/buffer_head.h> |
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#include <linux/gfp.h> |
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#include <linux/mpage.h> |
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#include <linux/pagemap.h> |
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#include <linux/writeback.h> |
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#include <linux/uio.h> |
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#include "nilfs.h" |
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#include "btnode.h" |
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#include "segment.h" #include "page.h" #include "mdt.h" #include "cpfile.h" #include "ifile.h" |
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/** * struct nilfs_iget_args - arguments used during comparison between inodes * @ino: inode number * @cno: checkpoint number * @root: pointer on NILFS root object (mounted checkpoint) * @for_gc: inode for GC flag */ |
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struct nilfs_iget_args { u64 ino; __u64 cno; |
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struct nilfs_root *root; |
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int for_gc; }; |
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|
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static int nilfs_iget_test(struct inode *inode, void *opaque); |
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void nilfs_inode_add_blocks(struct inode *inode, int n) { struct nilfs_root *root = NILFS_I(inode)->i_root; inode_add_bytes(inode, (1 << inode->i_blkbits) * n); if (root) |
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atomic64_add(n, &root->blocks_count); |
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} void nilfs_inode_sub_blocks(struct inode *inode, int n) { struct nilfs_root *root = NILFS_I(inode)->i_root; inode_sub_bytes(inode, (1 << inode->i_blkbits) * n); if (root) |
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atomic64_sub(n, &root->blocks_count); |
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} |
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/** * nilfs_get_block() - get a file block on the filesystem (callback function) * @inode - inode struct of the target file * @blkoff - file block number * @bh_result - buffer head to be mapped on * @create - indicate whether allocating the block or not when it has not * been allocated yet. * * This function does not issue actual read request of the specified data * block. It is done by VFS. |
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*/ int nilfs_get_block(struct inode *inode, sector_t blkoff, struct buffer_head *bh_result, int create) { struct nilfs_inode_info *ii = NILFS_I(inode); |
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struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
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__u64 blknum = 0; |
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int err = 0, ret; |
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unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; |
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|
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down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
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ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); |
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up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
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if (ret >= 0) { /* found */ |
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map_bh(bh_result, inode->i_sb, blknum); |
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if (ret > 0) bh_result->b_size = (ret << inode->i_blkbits); |
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goto out; } |
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/* data block was not found */ if (ret == -ENOENT && create) { struct nilfs_transaction_info ti; bh_result->b_blocknr = 0; err = nilfs_transaction_begin(inode->i_sb, &ti, 1); if (unlikely(err)) goto out; |
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err = nilfs_bmap_insert(ii->i_bmap, blkoff, |
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(unsigned long)bh_result); |
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if (unlikely(err != 0)) { if (err == -EEXIST) { /* * The get_block() function could be called * from multiple callers for an inode. * However, the page having this block must * be locked in this case. */ |
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printk(KERN_WARNING |
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"nilfs_get_block: a race condition " "while inserting a data block. " "(inode number=%lu, file block " "offset=%llu) ", inode->i_ino, (unsigned long long)blkoff); |
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err = 0; |
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} |
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nilfs_transaction_abort(inode->i_sb); |
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goto out; } |
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nilfs_mark_inode_dirty_sync(inode); |
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nilfs_transaction_commit(inode->i_sb); /* never fails */ |
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/* Error handling should be detailed */ set_buffer_new(bh_result); |
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set_buffer_delay(bh_result); |
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map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed to proper value */ } else if (ret == -ENOENT) { /* not found is not error (e.g. hole); must return without the mapped state flag. */ ; } else { err = ret; } out: return err; } /** * nilfs_readpage() - implement readpage() method of nilfs_aops {} * address_space_operations. * @file - file struct of the file to be read * @page - the page to be read */ static int nilfs_readpage(struct file *file, struct page *page) { return mpage_readpage(page, nilfs_get_block); } /** * nilfs_readpages() - implement readpages() method of nilfs_aops {} * address_space_operations. * @file - file struct of the file to be read * @mapping - address_space struct used for reading multiple pages * @pages - the pages to be read * @nr_pages - number of pages to be read */ static int nilfs_readpages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); } static int nilfs_writepages(struct address_space *mapping, struct writeback_control *wbc) { |
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struct inode *inode = mapping->host; int err = 0; |
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if (inode->i_sb->s_flags & MS_RDONLY) { nilfs_clear_dirty_pages(mapping, false); return -EROFS; } |
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if (wbc->sync_mode == WB_SYNC_ALL) err = nilfs_construct_dsync_segment(inode->i_sb, inode, wbc->range_start, wbc->range_end); return err; |
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} static int nilfs_writepage(struct page *page, struct writeback_control *wbc) { struct inode *inode = page->mapping->host; int err; |
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if (inode->i_sb->s_flags & MS_RDONLY) { |
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/* * It means that filesystem was remounted in read-only * mode because of error or metadata corruption. But we * have dirty pages that try to be flushed in background. * So, here we simply discard this dirty page. */ nilfs_clear_dirty_page(page, false); unlock_page(page); return -EROFS; } |
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redirty_page_for_writepage(wbc, page); unlock_page(page); if (wbc->sync_mode == WB_SYNC_ALL) { err = nilfs_construct_segment(inode->i_sb); if (unlikely(err)) return err; } else if (wbc->for_reclaim) nilfs_flush_segment(inode->i_sb, inode->i_ino); return 0; } static int nilfs_set_page_dirty(struct page *page) { |
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struct inode *inode = page->mapping->host; |
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int ret = __set_page_dirty_nobuffers(page); |
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if (page_has_buffers(page)) { |
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unsigned nr_dirty = 0; struct buffer_head *bh, *head; |
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/* * This page is locked by callers, and no other thread * concurrently marks its buffers dirty since they are * only dirtied through routines in fs/buffer.c in * which call sites of mark_buffer_dirty are protected * by page lock. */ bh = head = page_buffers(page); do { /* Do not mark hole blocks dirty */ if (buffer_dirty(bh) || !buffer_mapped(bh)) continue; set_buffer_dirty(bh); nr_dirty++; } while (bh = bh->b_this_page, bh != head); if (nr_dirty) nilfs_set_file_dirty(inode, nr_dirty); |
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} else if (ret) { |
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unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); |
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nilfs_set_file_dirty(inode, nr_dirty); |
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} return ret; } |
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void nilfs_write_failed(struct address_space *mapping, loff_t to) { struct inode *inode = mapping->host; if (to > inode->i_size) { |
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truncate_pagecache(inode, inode->i_size); |
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nilfs_truncate(inode); } } |
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static int nilfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { struct inode *inode = mapping->host; int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); if (unlikely(err)) return err; |
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err = block_write_begin(mapping, pos, len, flags, pagep, nilfs_get_block); if (unlikely(err)) { |
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nilfs_write_failed(mapping, pos + len); |
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nilfs_transaction_abort(inode->i_sb); |
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} |
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return err; } static int nilfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) { struct inode *inode = mapping->host; |
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unsigned start = pos & (PAGE_SIZE - 1); |
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unsigned nr_dirty; int err; nr_dirty = nilfs_page_count_clean_buffers(page, start, start + copied); copied = generic_write_end(file, mapping, pos, len, copied, page, fsdata); |
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nilfs_set_file_dirty(inode, nr_dirty); |
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err = nilfs_transaction_commit(inode->i_sb); |
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return err ? : copied; } static ssize_t |
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nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset) |
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{ |
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struct inode *inode = file_inode(iocb->ki_filp); |
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|
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if (iov_iter_rw(iter) == WRITE) |
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return 0; /* Needs synchronization with the cleaner */ |
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return blockdev_direct_IO(iocb, inode, iter, offset, nilfs_get_block); |
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} |
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const struct address_space_operations nilfs_aops = { |
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.writepage = nilfs_writepage, .readpage = nilfs_readpage, |
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.writepages = nilfs_writepages, .set_page_dirty = nilfs_set_page_dirty, .readpages = nilfs_readpages, .write_begin = nilfs_write_begin, .write_end = nilfs_write_end, /* .releasepage = nilfs_releasepage, */ .invalidatepage = block_invalidatepage, .direct_IO = nilfs_direct_IO, |
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.is_partially_uptodate = block_is_partially_uptodate, |
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}; |
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static int nilfs_insert_inode_locked(struct inode *inode, struct nilfs_root *root, unsigned long ino) { struct nilfs_iget_args args = { .ino = ino, .root = root, .cno = 0, .for_gc = 0 }; return insert_inode_locked4(inode, ino, nilfs_iget_test, &args); } |
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struct inode *nilfs_new_inode(struct inode *dir, umode_t mode) |
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{ struct super_block *sb = dir->i_sb; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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struct inode *inode; struct nilfs_inode_info *ii; |
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struct nilfs_root *root; |
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int err = -ENOMEM; ino_t ino; inode = new_inode(sb); if (unlikely(!inode)) goto failed; mapping_set_gfp_mask(inode->i_mapping, |
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mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
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root = NILFS_I(dir)->i_root; |
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ii = NILFS_I(inode); ii->i_state = 1 << NILFS_I_NEW; |
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ii->i_root = root; |
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err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh); |
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if (unlikely(err)) goto failed_ifile_create_inode; /* reference count of i_bh inherits from nilfs_mdt_read_block() */ |
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atomic64_inc(&root->inodes_count); |
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inode_init_owner(inode, dir, mode); |
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inode->i_ino = ino; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { err = nilfs_bmap_read(ii->i_bmap, NULL); if (err < 0) |
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goto failed_after_creation; |
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set_bit(NILFS_I_BMAP, &ii->i_state); /* No lock is needed; iget() ensures it. */ } |
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ii->i_flags = nilfs_mask_flags( mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED); |
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/* ii->i_file_acl = 0; */ /* ii->i_dir_acl = 0; */ |
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ii->i_dir_start_lookup = 0; |
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nilfs_set_inode_flags(inode); |
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spin_lock(&nilfs->ns_next_gen_lock); inode->i_generation = nilfs->ns_next_generation++; spin_unlock(&nilfs->ns_next_gen_lock); |
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if (nilfs_insert_inode_locked(inode, root, ino) < 0) { err = -EIO; goto failed_after_creation; } |
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err = nilfs_init_acl(inode, dir); if (unlikely(err)) |
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goto failed_after_creation; /* never occur. When supporting |
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nilfs_init_acl(), proper cancellation of above jobs should be considered */ |
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return inode; |
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failed_after_creation: |
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clear_nlink(inode); |
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unlock_new_inode(inode); |
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iput(inode); /* raw_inode will be deleted through |
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nilfs_evict_inode() */ |
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goto failed; failed_ifile_create_inode: make_bad_inode(inode); iput(inode); /* if i_nlink == 1, generic_forget_inode() will be called */ failed: return ERR_PTR(err); } |
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void nilfs_set_inode_flags(struct inode *inode) { unsigned int flags = NILFS_I(inode)->i_flags; |
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unsigned int new_fl = 0; |
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if (flags & FS_SYNC_FL) |
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new_fl |= S_SYNC; |
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if (flags & FS_APPEND_FL) |
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new_fl |= S_APPEND; |
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if (flags & FS_IMMUTABLE_FL) |
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new_fl |= S_IMMUTABLE; |
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if (flags & FS_NOATIME_FL) |
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new_fl |= S_NOATIME; |
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if (flags & FS_DIRSYNC_FL) |
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new_fl |= S_DIRSYNC; inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC); |
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} int nilfs_read_inode_common(struct inode *inode, struct nilfs_inode *raw_inode) { struct nilfs_inode_info *ii = NILFS_I(inode); int err; inode->i_mode = le16_to_cpu(raw_inode->i_mode); |
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i_uid_write(inode, le32_to_cpu(raw_inode->i_uid)); i_gid_write(inode, le32_to_cpu(raw_inode->i_gid)); |
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set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
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inode->i_size = le64_to_cpu(raw_inode->i_size); inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); |
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inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); |
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if (inode->i_nlink == 0) return -ESTALE; /* this inode is deleted */ |
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inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); ii->i_flags = le32_to_cpu(raw_inode->i_flags); #if 0 ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); ii->i_dir_acl = S_ISREG(inode->i_mode) ? 0 : le32_to_cpu(raw_inode->i_dir_acl); #endif |
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ii->i_dir_start_lookup = 0; |
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inode->i_generation = le32_to_cpu(raw_inode->i_generation); if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { err = nilfs_bmap_read(ii->i_bmap, raw_inode); if (err < 0) return err; set_bit(NILFS_I_BMAP, &ii->i_state); /* No lock is needed; iget() ensures it. */ } return 0; } |
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static int __nilfs_read_inode(struct super_block *sb, struct nilfs_root *root, unsigned long ino, |
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struct inode *inode) { |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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struct buffer_head *bh; struct nilfs_inode *raw_inode; int err; |
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down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
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err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); |
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if (unlikely(err)) goto bad_inode; |
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raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh); |
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err = nilfs_read_inode_common(inode, raw_inode); if (err) |
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goto failed_unmap; if (S_ISREG(inode->i_mode)) { inode->i_op = &nilfs_file_inode_operations; inode->i_fop = &nilfs_file_operations; inode->i_mapping->a_ops = &nilfs_aops; |
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} else if (S_ISDIR(inode->i_mode)) { inode->i_op = &nilfs_dir_inode_operations; inode->i_fop = &nilfs_dir_operations; inode->i_mapping->a_ops = &nilfs_aops; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &nilfs_symlink_inode_operations; |
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inode_nohighmem(inode); |
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inode->i_mapping->a_ops = &nilfs_aops; } else { inode->i_op = &nilfs_special_inode_operations; init_special_inode( inode, inode->i_mode, |
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huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
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} |
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nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
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brelse(bh); |
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|
503 |
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fdc
|
504 |
nilfs_set_inode_flags(inode); |
0ce187c4f
|
505 |
mapping_set_gfp_mask(inode->i_mapping, |
c62d25556
|
506 |
mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS)); |
05fe58fdc
|
507 508 509 |
return 0; failed_unmap: |
e912a5b66
|
510 |
nilfs_ifile_unmap_inode(root->ifile, ino, bh); |
05fe58fdc
|
511 512 513 |
brelse(bh); bad_inode: |
365e215ce
|
514 |
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); |
05fe58fdc
|
515 516 |
return err; } |
0e14a3595
|
517 518 519 520 |
static int nilfs_iget_test(struct inode *inode, void *opaque) { struct nilfs_iget_args *args = opaque; struct nilfs_inode_info *ii; |
4d8d9293d
|
521 |
if (args->ino != inode->i_ino || args->root != NILFS_I(inode)->i_root) |
0e14a3595
|
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 |
return 0; ii = NILFS_I(inode); if (!test_bit(NILFS_I_GCINODE, &ii->i_state)) return !args->for_gc; return args->for_gc && args->cno == ii->i_cno; } static int nilfs_iget_set(struct inode *inode, void *opaque) { struct nilfs_iget_args *args = opaque; inode->i_ino = args->ino; if (args->for_gc) { NILFS_I(inode)->i_state = 1 << NILFS_I_GCINODE; NILFS_I(inode)->i_cno = args->cno; |
4d8d9293d
|
539 540 541 542 543 |
NILFS_I(inode)->i_root = NULL; } else { if (args->root && args->ino == NILFS_ROOT_INO) nilfs_get_root(args->root); NILFS_I(inode)->i_root = args->root; |
0e14a3595
|
544 545 546 |
} return 0; } |
032dbb3b5
|
547 548 549 550 551 552 553 554 555 |
struct inode *nilfs_ilookup(struct super_block *sb, struct nilfs_root *root, unsigned long ino) { struct nilfs_iget_args args = { .ino = ino, .root = root, .cno = 0, .for_gc = 0 }; return ilookup5(sb, ino, nilfs_iget_test, &args); } |
f1e89c86f
|
556 557 |
struct inode *nilfs_iget_locked(struct super_block *sb, struct nilfs_root *root, unsigned long ino) |
05fe58fdc
|
558 |
{ |
4d8d9293d
|
559 560 561 |
struct nilfs_iget_args args = { .ino = ino, .root = root, .cno = 0, .for_gc = 0 }; |
f1e89c86f
|
562 563 564 565 566 567 568 |
return iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); } struct inode *nilfs_iget(struct super_block *sb, struct nilfs_root *root, unsigned long ino) { |
05fe58fdc
|
569 570 |
struct inode *inode; int err; |
f1e89c86f
|
571 |
inode = nilfs_iget_locked(sb, root, ino); |
05fe58fdc
|
572 573 574 575 |
if (unlikely(!inode)) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; |
e912a5b66
|
576 |
err = __nilfs_read_inode(sb, root, ino, inode); |
05fe58fdc
|
577 578 579 580 581 582 583 |
if (unlikely(err)) { iget_failed(inode); return ERR_PTR(err); } unlock_new_inode(inode); return inode; } |
263d90cef
|
584 585 586 |
struct inode *nilfs_iget_for_gc(struct super_block *sb, unsigned long ino, __u64 cno) { |
4d8d9293d
|
587 588 589 |
struct nilfs_iget_args args = { .ino = ino, .root = NULL, .cno = cno, .for_gc = 1 }; |
263d90cef
|
590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 |
struct inode *inode; int err; inode = iget5_locked(sb, ino, nilfs_iget_test, nilfs_iget_set, &args); if (unlikely(!inode)) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; err = nilfs_init_gcinode(inode); if (unlikely(err)) { iget_failed(inode); return ERR_PTR(err); } unlock_new_inode(inode); return inode; } |
05fe58fdc
|
607 608 609 610 611 612 |
void nilfs_write_inode_common(struct inode *inode, struct nilfs_inode *raw_inode, int has_bmap) { struct nilfs_inode_info *ii = NILFS_I(inode); raw_inode->i_mode = cpu_to_le16(inode->i_mode); |
305d3d0db
|
613 614 |
raw_inode->i_uid = cpu_to_le32(i_uid_read(inode)); raw_inode->i_gid = cpu_to_le32(i_gid_read(inode)); |
05fe58fdc
|
615 616 617 618 |
raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); raw_inode->i_size = cpu_to_le64(inode->i_size); raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); |
612392307
|
619 620 |
raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); |
05fe58fdc
|
621 |
raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
05fe58fdc
|
622 623 |
raw_inode->i_flags = cpu_to_le32(ii->i_flags); raw_inode->i_generation = cpu_to_le32(inode->i_generation); |
56eb55388
|
624 625 626 627 628 629 630 631 632 |
if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { struct the_nilfs *nilfs = inode->i_sb->s_fs_info; /* zero-fill unused portion in the case of super root block */ raw_inode->i_xattr = 0; raw_inode->i_pad = 0; memset((void *)raw_inode + sizeof(*raw_inode), 0, nilfs->ns_inode_size - sizeof(*raw_inode)); } |
05fe58fdc
|
633 634 635 636 |
if (has_bmap) nilfs_bmap_write(ii->i_bmap, raw_inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) raw_inode->i_device_code = |
cdce214e3
|
637 |
cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
05fe58fdc
|
638 639 640 |
/* When extending inode, nilfs->ns_inode_size should be checked for substitutions of appended fields */ } |
b9f661407
|
641 |
void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags) |
05fe58fdc
|
642 643 644 |
{ ino_t ino = inode->i_ino; struct nilfs_inode_info *ii = NILFS_I(inode); |
e912a5b66
|
645 |
struct inode *ifile = ii->i_root->ifile; |
05fe58fdc
|
646 |
struct nilfs_inode *raw_inode; |
e912a5b66
|
647 |
raw_inode = nilfs_ifile_map_inode(ifile, ino, ibh); |
05fe58fdc
|
648 |
|
05fe58fdc
|
649 |
if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) |
e912a5b66
|
650 |
memset(raw_inode, 0, NILFS_MDT(ifile)->mi_entry_size); |
b9f661407
|
651 652 |
if (flags & I_DIRTY_DATASYNC) set_bit(NILFS_I_INODE_SYNC, &ii->i_state); |
05fe58fdc
|
653 654 655 656 657 |
nilfs_write_inode_common(inode, raw_inode, 0); /* XXX: call with has_bmap = 0 is a workaround to avoid deadlock of bmap. This delays update of i_bmap to just before writing */ |
e912a5b66
|
658 |
nilfs_ifile_unmap_inode(ifile, ino, ibh); |
05fe58fdc
|
659 660 661 662 663 664 665 |
} #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, unsigned long from) { |
3568a13f4
|
666 |
__u64 b; |
05fe58fdc
|
667 668 669 670 |
int ret; if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; |
e828949e5
|
671 |
repeat: |
05fe58fdc
|
672 673 674 675 676 677 678 679 |
ret = nilfs_bmap_last_key(ii->i_bmap, &b); if (ret == -ENOENT) return; else if (ret < 0) goto failed; if (b < from) return; |
3568a13f4
|
680 |
b -= min_t(__u64, NILFS_MAX_TRUNCATE_BLOCKS, b - from); |
05fe58fdc
|
681 682 683 684 685 |
ret = nilfs_bmap_truncate(ii->i_bmap, b); nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); if (!ret || (ret == -ENOMEM && nilfs_bmap_truncate(ii->i_bmap, b) == 0)) goto repeat; |
e828949e5
|
686 687 688 689 |
failed: nilfs_warning(ii->vfs_inode.i_sb, __func__, "failed to truncate bmap (ino=%lu, err=%d)", ii->vfs_inode.i_ino, ret); |
05fe58fdc
|
690 691 692 693 694 695 696 697 698 |
} void nilfs_truncate(struct inode *inode) { unsigned long blkoff; unsigned int blocksize; struct nilfs_transaction_info ti; struct super_block *sb = inode->i_sb; struct nilfs_inode_info *ii = NILFS_I(inode); |
05fe58fdc
|
699 700 701 702 703 704 705 706 |
if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) return; blocksize = sb->s_blocksize; blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; |
1f5abe7e7
|
707 |
nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fdc
|
708 709 710 711 712 713 714 715 |
block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); nilfs_truncate_bmap(ii, blkoff); inode->i_mtime = inode->i_ctime = CURRENT_TIME; if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); |
abdb318b7
|
716 |
nilfs_mark_inode_dirty(inode); |
bcbc8c648
|
717 |
nilfs_set_file_dirty(inode, 0); |
47420c799
|
718 |
nilfs_transaction_commit(sb); |
05fe58fdc
|
719 720 721 |
/* May construct a logical segment and may fail in sync mode. But truncate has no return value. */ } |
6fd1e5c99
|
722 723 724 |
static void nilfs_clear_inode(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); |
518d1a6a1
|
725 |
struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
6fd1e5c99
|
726 727 728 729 730 731 732 |
/* * Free resources allocated in nilfs_read_inode(), here. */ BUG_ON(!list_empty(&ii->i_dirty)); brelse(ii->i_bh); ii->i_bh = NULL; |
518d1a6a1
|
733 734 |
if (mdi && mdi->mi_palloc_cache) nilfs_palloc_destroy_cache(inode); |
6fd1e5c99
|
735 736 737 738 |
if (test_bit(NILFS_I_BMAP, &ii->i_state)) nilfs_bmap_clear(ii->i_bmap); nilfs_btnode_cache_clear(&ii->i_btnode_cache); |
4d8d9293d
|
739 740 741 |
if (ii->i_root && inode->i_ino == NILFS_ROOT_INO) nilfs_put_root(ii->i_root); |
6fd1e5c99
|
742 743 744 |
} void nilfs_evict_inode(struct inode *inode) |
05fe58fdc
|
745 746 747 748 |
{ struct nilfs_transaction_info ti; struct super_block *sb = inode->i_sb; struct nilfs_inode_info *ii = NILFS_I(inode); |
25b18d39c
|
749 |
int ret; |
05fe58fdc
|
750 |
|
4d8d9293d
|
751 |
if (inode->i_nlink || !ii->i_root || unlikely(is_bad_inode(inode))) { |
91b0abe36
|
752 |
truncate_inode_pages_final(&inode->i_data); |
dbd5768f8
|
753 |
clear_inode(inode); |
6fd1e5c99
|
754 |
nilfs_clear_inode(inode); |
05fe58fdc
|
755 756 |
return; } |
1f5abe7e7
|
757 |
nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
91b0abe36
|
758 |
truncate_inode_pages_final(&inode->i_data); |
05fe58fdc
|
759 |
|
e912a5b66
|
760 |
/* TODO: some of the following operations may fail. */ |
05fe58fdc
|
761 |
nilfs_truncate_bmap(ii, 0); |
abdb318b7
|
762 |
nilfs_mark_inode_dirty(inode); |
dbd5768f8
|
763 |
clear_inode(inode); |
e912a5b66
|
764 |
|
25b18d39c
|
765 766 |
ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino); if (!ret) |
e5f7f8484
|
767 |
atomic64_dec(&ii->i_root->inodes_count); |
e912a5b66
|
768 |
|
6fd1e5c99
|
769 |
nilfs_clear_inode(inode); |
e912a5b66
|
770 |
|
05fe58fdc
|
771 772 |
if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); |
47420c799
|
773 |
nilfs_transaction_commit(sb); |
05fe58fdc
|
774 775 776 777 778 779 780 |
/* May construct a logical segment and may fail in sync mode. But delete_inode has no return value. */ } int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) { struct nilfs_transaction_info ti; |
2b0143b5c
|
781 |
struct inode *inode = d_inode(dentry); |
05fe58fdc
|
782 |
struct super_block *sb = inode->i_sb; |
47420c799
|
783 |
int err; |
05fe58fdc
|
784 785 786 787 788 789 790 791 |
err = inode_change_ok(inode, iattr); if (err) return err; err = nilfs_transaction_begin(sb, &ti, 0); if (unlikely(err)) return err; |
1025774ce
|
792 793 794 |
if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size != i_size_read(inode)) { |
562c72aa5
|
795 |
inode_dio_wait(inode); |
2d1b399b2
|
796 797 |
truncate_setsize(inode, iattr->ia_size); nilfs_truncate(inode); |
1025774ce
|
798 799 800 801 802 803 |
} setattr_copy(inode, iattr); mark_inode_dirty(inode); if (iattr->ia_valid & ATTR_MODE) { |
05fe58fdc
|
804 |
err = nilfs_acl_chmod(inode); |
1025774ce
|
805 806 807 808 809 |
if (unlikely(err)) goto out_err; } return nilfs_transaction_commit(sb); |
47420c799
|
810 |
|
1025774ce
|
811 812 |
out_err: nilfs_transaction_abort(sb); |
47420c799
|
813 |
return err; |
05fe58fdc
|
814 |
} |
10556cb21
|
815 |
int nilfs_permission(struct inode *inode, int mask) |
dc3d3b810
|
816 |
{ |
730e908f3
|
817 |
struct nilfs_root *root = NILFS_I(inode)->i_root; |
dc3d3b810
|
818 819 820 |
if ((mask & MAY_WRITE) && root && root->cno != NILFS_CPTREE_CURRENT_CNO) return -EROFS; /* snapshot is not writable */ |
2830ba7f3
|
821 |
return generic_permission(inode, mask); |
dc3d3b810
|
822 |
} |
bcbc8c648
|
823 |
int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) |
05fe58fdc
|
824 |
{ |
e3154e974
|
825 |
struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fdc
|
826 827 |
struct nilfs_inode_info *ii = NILFS_I(inode); int err; |
693dd3212
|
828 |
spin_lock(&nilfs->ns_inode_lock); |
05fe58fdc
|
829 |
if (ii->i_bh == NULL) { |
693dd3212
|
830 |
spin_unlock(&nilfs->ns_inode_lock); |
e912a5b66
|
831 832 |
err = nilfs_ifile_get_inode_block(ii->i_root->ifile, inode->i_ino, pbh); |
05fe58fdc
|
833 834 |
if (unlikely(err)) return err; |
693dd3212
|
835 |
spin_lock(&nilfs->ns_inode_lock); |
05fe58fdc
|
836 837 838 839 840 841 842 843 844 845 |
if (ii->i_bh == NULL) ii->i_bh = *pbh; else { brelse(*pbh); *pbh = ii->i_bh; } } else *pbh = ii->i_bh; get_bh(*pbh); |
693dd3212
|
846 |
spin_unlock(&nilfs->ns_inode_lock); |
05fe58fdc
|
847 848 849 850 851 852 |
return 0; } int nilfs_inode_dirty(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); |
e3154e974
|
853 |
struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fdc
|
854 855 856 |
int ret = 0; if (!list_empty(&ii->i_dirty)) { |
693dd3212
|
857 |
spin_lock(&nilfs->ns_inode_lock); |
05fe58fdc
|
858 859 |
ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || test_bit(NILFS_I_BUSY, &ii->i_state); |
693dd3212
|
860 |
spin_unlock(&nilfs->ns_inode_lock); |
05fe58fdc
|
861 862 863 |
} return ret; } |
bcbc8c648
|
864 |
int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) |
05fe58fdc
|
865 866 |
{ struct nilfs_inode_info *ii = NILFS_I(inode); |
e3154e974
|
867 |
struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
05fe58fdc
|
868 |
|
693dd3212
|
869 |
atomic_add(nr_dirty, &nilfs->ns_ndirtyblks); |
05fe58fdc
|
870 |
|
458c5b082
|
871 |
if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fdc
|
872 |
return 0; |
693dd3212
|
873 |
spin_lock(&nilfs->ns_inode_lock); |
05fe58fdc
|
874 875 876 877 878 879 880 |
if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && !test_bit(NILFS_I_BUSY, &ii->i_state)) { /* Because this routine may race with nilfs_dispose_list(), we have to check NILFS_I_QUEUED here, too. */ if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { /* This will happen when somebody is freeing this inode. */ |
693dd3212
|
881 |
nilfs_warning(inode->i_sb, __func__, |
05fe58fdc
|
882 883 884 |
"cannot get inode (ino=%lu) ", inode->i_ino); |
693dd3212
|
885 |
spin_unlock(&nilfs->ns_inode_lock); |
05fe58fdc
|
886 887 888 |
return -EINVAL; /* NILFS_I_DIRTY may remain for freeing inode */ } |
eaae0f37d
|
889 |
list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files); |
05fe58fdc
|
890 891 |
set_bit(NILFS_I_QUEUED, &ii->i_state); } |
693dd3212
|
892 |
spin_unlock(&nilfs->ns_inode_lock); |
05fe58fdc
|
893 894 |
return 0; } |
b9f661407
|
895 |
int __nilfs_mark_inode_dirty(struct inode *inode, int flags) |
05fe58fdc
|
896 |
{ |
05fe58fdc
|
897 898 |
struct buffer_head *ibh; int err; |
bcbc8c648
|
899 |
err = nilfs_load_inode_block(inode, &ibh); |
05fe58fdc
|
900 901 902 903 904 905 |
if (unlikely(err)) { nilfs_warning(inode->i_sb, __func__, "failed to reget inode block. "); return err; } |
b9f661407
|
906 |
nilfs_update_inode(inode, ibh, flags); |
5fc7b1417
|
907 |
mark_buffer_dirty(ibh); |
e912a5b66
|
908 |
nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile); |
05fe58fdc
|
909 910 911 912 913 914 915 916 917 918 919 920 921 922 |
brelse(ibh); return 0; } /** * nilfs_dirty_inode - reflect changes on given inode to an inode block. * @inode: inode of the file to be registered. * * nilfs_dirty_inode() loads a inode block containing the specified * @inode and copies data from a nilfs_inode to a corresponding inode * entry in the inode block. This operation is excluded from the segment * construction. This function can be called both as a single operation * and as a part of indivisible file operations. */ |
aa3857295
|
923 |
void nilfs_dirty_inode(struct inode *inode, int flags) |
05fe58fdc
|
924 925 |
{ struct nilfs_transaction_info ti; |
7d6cd92fe
|
926 |
struct nilfs_mdt_info *mdi = NILFS_MDT(inode); |
05fe58fdc
|
927 928 929 930 931 932 933 934 |
if (is_bad_inode(inode)) { nilfs_warning(inode->i_sb, __func__, "tried to mark bad_inode dirty. ignored. "); dump_stack(); return; } |
7d6cd92fe
|
935 936 937 938 |
if (mdi) { nilfs_mdt_mark_dirty(inode); return; } |
05fe58fdc
|
939 |
nilfs_transaction_begin(inode->i_sb, &ti, 0); |
b9f661407
|
940 |
__nilfs_mark_inode_dirty(inode, flags); |
47420c799
|
941 |
nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fdc
|
942 |
} |
622daaff0
|
943 944 945 946 |
int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { |
0ef28f9ae
|
947 |
struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
622daaff0
|
948 949 950 951 952 953 954 955 956 957 958 959 |
__u64 logical = 0, phys = 0, size = 0; __u32 flags = 0; loff_t isize; sector_t blkoff, end_blkoff; sector_t delalloc_blkoff; unsigned long delalloc_blklen; unsigned int blkbits = inode->i_blkbits; int ret, n; ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); if (ret) return ret; |
5955102c9
|
960 |
inode_lock(inode); |
622daaff0
|
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isize = i_size_read(inode); blkoff = start >> blkbits; end_blkoff = (start + len - 1) >> blkbits; delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, &delalloc_blkoff); do { __u64 blkphy; unsigned int maxblocks; if (delalloc_blklen && blkoff == delalloc_blkoff) { if (size) { /* End of the current extent */ ret = fiemap_fill_next_extent( fieinfo, logical, phys, size, flags); if (ret) break; } if (blkoff > end_blkoff) break; flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; logical = blkoff << blkbits; phys = 0; size = delalloc_blklen << blkbits; blkoff = delalloc_blkoff + delalloc_blklen; delalloc_blklen = nilfs_find_uncommitted_extent( inode, blkoff, &delalloc_blkoff); continue; } /* * Limit the number of blocks that we look up so as * not to get into the next delayed allocation extent. */ maxblocks = INT_MAX; if (delalloc_blklen) maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, maxblocks); blkphy = 0; down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); n = nilfs_bmap_lookup_contig( NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); if (n < 0) { int past_eof; if (unlikely(n != -ENOENT)) break; /* error */ /* HOLE */ blkoff++; past_eof = ((blkoff << blkbits) >= isize); if (size) { /* End of the current extent */ if (past_eof) flags |= FIEMAP_EXTENT_LAST; ret = fiemap_fill_next_extent( fieinfo, logical, phys, size, flags); if (ret) break; size = 0; } if (blkoff > end_blkoff || past_eof) break; } else { if (size) { if (phys && blkphy << blkbits == phys + size) { /* The current extent goes on */ size += n << blkbits; } else { /* Terminate the current extent */ ret = fiemap_fill_next_extent( fieinfo, logical, phys, size, flags); if (ret || blkoff > end_blkoff) break; /* Start another extent */ flags = FIEMAP_EXTENT_MERGED; logical = blkoff << blkbits; phys = blkphy << blkbits; size = n << blkbits; } } else { /* Start a new extent */ flags = FIEMAP_EXTENT_MERGED; logical = blkoff << blkbits; phys = blkphy << blkbits; size = n << blkbits; } blkoff += n; } cond_resched(); } while (true); /* If ret is 1 then we just hit the end of the extent array */ if (ret == 1) ret = 0; |
5955102c9
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1069 |
inode_unlock(inode); |
622daaff0
|
1070 1071 |
return ret; } |