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fs/udf/inode.c
60.4 KB
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/* * inode.c * * PURPOSE * Inode handling routines for the OSTA-UDF(tm) filesystem. * |
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* COPYRIGHT * This file is distributed under the terms of the GNU General Public * License (GPL). Copies of the GPL can be obtained from: * ftp://prep.ai.mit.edu/pub/gnu/GPL * Each contributing author retains all rights to their own work. * * (C) 1998 Dave Boynton * (C) 1998-2004 Ben Fennema * (C) 1999-2000 Stelias Computing Inc * * HISTORY * * 10/04/98 dgb Added rudimentary directory functions * 10/07/98 Fully working udf_block_map! It works! * 11/25/98 bmap altered to better support extents * 12/06/98 blf partition support in udf_iget, udf_block_map and udf_read_inode * 12/12/98 rewrote udf_block_map to handle next extents and descs across * block boundaries (which is not actually allowed) * 12/20/98 added support for strategy 4096 * 03/07/99 rewrote udf_block_map (again) * New funcs, inode_bmap, udf_next_aext * 04/19/99 Support for writing device EA's for major/minor # */ #include "udfdecl.h" #include <linux/mm.h> #include <linux/smp_lock.h> #include <linux/module.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> #include <linux/writeback.h> #include <linux/slab.h> #include "udf_i.h" #include "udf_sb.h" MODULE_AUTHOR("Ben Fennema"); MODULE_DESCRIPTION("Universal Disk Format Filesystem"); MODULE_LICENSE("GPL"); #define EXTENT_MERGE_SIZE 5 static mode_t udf_convert_permissions(struct fileEntry *); static int udf_update_inode(struct inode *, int); static void udf_fill_inode(struct inode *, struct buffer_head *); |
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static int udf_alloc_i_data(struct inode *inode, size_t size); |
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static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, |
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long *, int *); |
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static int8_t udf_insert_aext(struct inode *, struct extent_position, |
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kernel_lb_addr, uint32_t); |
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static void udf_split_extents(struct inode *, int *, int, int, |
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kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
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static void udf_prealloc_extents(struct inode *, int, int, |
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kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
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static void udf_merge_extents(struct inode *, |
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kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
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static void udf_update_extents(struct inode *, |
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kernel_long_ad[EXTENT_MERGE_SIZE], int, int, struct extent_position *); |
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static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); /* * udf_delete_inode * * PURPOSE * Clean-up before the specified inode is destroyed. * * DESCRIPTION * This routine is called when the kernel destroys an inode structure * ie. when iput() finds i_count == 0. * * HISTORY * July 1, 1997 - Andrew E. Mileski * Written, tested, and released. * * Called at the last iput() if i_nlink is zero. */ |
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void udf_delete_inode(struct inode *inode) |
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{ |
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truncate_inode_pages(&inode->i_data, 0); |
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if (is_bad_inode(inode)) goto no_delete; inode->i_size = 0; udf_truncate(inode); lock_kernel(); udf_update_inode(inode, IS_SYNC(inode)); udf_free_inode(inode); unlock_kernel(); return; |
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no_delete: |
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clear_inode(inode); } |
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/* * If we are going to release inode from memory, we discard preallocation and * truncate last inode extent to proper length. We could use drop_inode() but * it's called under inode_lock and thus we cannot mark inode dirty there. We * use clear_inode() but we have to make sure to write inode as it's not written * automatically. */ |
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void udf_clear_inode(struct inode *inode) { if (!(inode->i_sb->s_flags & MS_RDONLY)) { lock_kernel(); |
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/* Discard preallocation for directories, symlinks, etc. */ |
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udf_discard_prealloc(inode); |
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udf_truncate_tail_extent(inode); |
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unlock_kernel(); |
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write_inode_now(inode, 1); |
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} |
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kfree(UDF_I_DATA(inode)); UDF_I_DATA(inode) = NULL; } static int udf_writepage(struct page *page, struct writeback_control *wbc) { return block_write_full_page(page, udf_get_block, wbc); } static int udf_readpage(struct file *file, struct page *page) { return block_read_full_page(page, udf_get_block); } |
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static int udf_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) |
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{ return block_prepare_write(page, from, to, udf_get_block); } static sector_t udf_bmap(struct address_space *mapping, sector_t block) { |
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return generic_block_bmap(mapping, block, udf_get_block); |
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} |
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const struct address_space_operations udf_aops = { |
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.readpage = udf_readpage, .writepage = udf_writepage, .sync_page = block_sync_page, .prepare_write = udf_prepare_write, .commit_write = generic_commit_write, .bmap = udf_bmap, |
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}; |
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void udf_expand_file_adinicb(struct inode *inode, int newsize, int *err) |
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{ struct page *page; char *kaddr; struct writeback_control udf_wbc = { .sync_mode = WB_SYNC_NONE, .nr_to_write = 1, }; /* from now on we have normal address_space methods */ inode->i_data.a_ops = &udf_aops; |
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if (!UDF_I_LENALLOC(inode)) { |
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; else UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; mark_inode_dirty(inode); return; } page = grab_cache_page(inode->i_mapping, 0); |
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BUG_ON(!PageLocked(page)); |
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if (!PageUptodate(page)) { |
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kaddr = kmap(page); memset(kaddr + UDF_I_LENALLOC(inode), 0x00, |
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PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); |
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memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), |
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UDF_I_LENALLOC(inode)); |
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flush_dcache_page(page); SetPageUptodate(page); kunmap(page); } memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, |
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UDF_I_LENALLOC(inode)); |
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UDF_I_LENALLOC(inode) = 0; if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; else UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; inode->i_data.a_ops->writepage(page, &udf_wbc); page_cache_release(page); mark_inode_dirty(inode); } |
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struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, int *err) |
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{ int newblock; |
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struct buffer_head *dbh = NULL; kernel_lb_addr eloc; uint32_t elen; |
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uint8_t alloctype; |
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struct extent_position epos; |
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struct udf_fileident_bh sfibh, dfibh; loff_t f_pos = udf_ext0_offset(inode) >> 2; int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; struct fileIdentDesc cfi, *sfi, *dfi; if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) alloctype = ICBTAG_FLAG_AD_SHORT; else alloctype = ICBTAG_FLAG_AD_LONG; |
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if (!inode->i_size) { |
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UDF_I_ALLOCTYPE(inode) = alloctype; mark_inode_dirty(inode); return NULL; } /* alloc block, and copy data to it */ *block = udf_new_block(inode->i_sb, inode, |
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UDF_I_LOCATION(inode).partitionReferenceNum, UDF_I_LOCATION(inode).logicalBlockNum, err); |
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if (!(*block)) return NULL; newblock = udf_get_pblock(inode->i_sb, *block, |
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UDF_I_LOCATION(inode).partitionReferenceNum, 0); |
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if (!newblock) return NULL; dbh = udf_tgetblk(inode->i_sb, newblock); if (!dbh) return NULL; lock_buffer(dbh); memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); set_buffer_uptodate(dbh); unlock_buffer(dbh); mark_buffer_dirty_inode(dbh, inode); |
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sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2; |
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sfibh.sbh = sfibh.ebh = NULL; |
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dfibh.soffset = dfibh.eoffset = 0; dfibh.sbh = dfibh.ebh = dbh; |
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while ((f_pos < size)) { |
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UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
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sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL); if (!sfi) { |
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brelse(dbh); |
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return NULL; } UDF_I_ALLOCTYPE(inode) = alloctype; sfi->descTag.tagLocation = cpu_to_le32(*block); dfibh.soffset = dfibh.eoffset; dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, |
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sfi->fileIdent + le16_to_cpu(sfi->lengthOfImpUse))) { |
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UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; |
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brelse(dbh); |
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return NULL; } } mark_buffer_dirty_inode(dbh, inode); |
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memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, UDF_I_LENALLOC(inode)); |
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UDF_I_LENALLOC(inode) = 0; |
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eloc.logicalBlockNum = *block; |
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eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; |
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elen = inode->i_size; UDF_I_LENEXTENTS(inode) = elen; |
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epos.bh = NULL; epos.block = UDF_I_LOCATION(inode); epos.offset = udf_file_entry_alloc_offset(inode); udf_add_aext(inode, &epos, eloc, elen, 0); |
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/* UniqueID stuff */ |
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brelse(epos.bh); |
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mark_inode_dirty(inode); return dbh; } |
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static int udf_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) |
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{ int err, new; struct buffer_head *bh; unsigned long phys; |
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if (!create) { |
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phys = udf_block_map(inode, block); if (phys) map_bh(bh_result, inode->i_sb, phys); return 0; } err = -EIO; new = 0; bh = NULL; lock_kernel(); if (block < 0) goto abort_negative; |
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if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) { UDF_I_NEXT_ALLOC_BLOCK(inode)++; UDF_I_NEXT_ALLOC_GOAL(inode)++; |
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} err = 0; bh = inode_getblk(inode, block, &err, &phys, &new); |
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BUG_ON(bh); |
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if (err) goto abort; |
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BUG_ON(!phys); |
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if (new) set_buffer_new(bh_result); map_bh(bh_result, inode->i_sb, phys); |
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abort: |
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unlock_kernel(); return err; |
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abort_negative: |
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udf_warning(inode->i_sb, "udf_get_block", "block < 0"); goto abort; } |
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static struct buffer_head *udf_getblk(struct inode *inode, long block, int create, int *err) |
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{ struct buffer_head dummy; dummy.b_state = 0; dummy.b_blocknr = -1000; *err = udf_get_block(inode, block, &dummy, create); |
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if (!*err && buffer_mapped(&dummy)) { |
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struct buffer_head *bh; bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
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if (buffer_new(&dummy)) { |
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lock_buffer(bh); memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); set_buffer_uptodate(bh); unlock_buffer(bh); mark_buffer_dirty_inode(bh, inode); } return bh; } return NULL; } |
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/* Extend the file by 'blocks' blocks, return the number of extents added */ int udf_extend_file(struct inode *inode, struct extent_position *last_pos, |
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kernel_long_ad * last_ext, sector_t blocks) |
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{ sector_t add; int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); struct super_block *sb = inode->i_sb; |
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kernel_lb_addr prealloc_loc = { 0, 0 }; |
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int prealloc_len = 0; /* The previous extent is fake and we should not extend by anything * - there's nothing to do... */ if (!blocks && fake) return 0; /* Round the last extent up to a multiple of block size */ if (last_ext->extLength & (sb->s_blocksize - 1)) { last_ext->extLength = |
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(last_ext->extLength & UDF_EXTENT_FLAG_MASK) | (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); |
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UDF_I_LENEXTENTS(inode) = |
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(UDF_I_LENEXTENTS(inode) + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); |
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} /* Last extent are just preallocated blocks? */ |
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if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_ALLOCATED) { |
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/* Save the extent so that we can reattach it to the end */ prealloc_loc = last_ext->extLocation; prealloc_len = last_ext->extLength; /* Mark the extent as a hole */ last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
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(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
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last_ext->extLocation.logicalBlockNum = 0; |
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last_ext->extLocation.partitionReferenceNum = 0; |
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} /* Can we merge with the previous extent? */ |
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if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == EXT_NOT_RECORDED_NOT_ALLOCATED) { add = ((1 << 30) - sb->s_blocksize - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> sb-> s_blocksize_bits; |
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if (add > blocks) add = blocks; blocks -= add; last_ext->extLength += add << sb->s_blocksize_bits; } if (fake) { udf_add_aext(inode, last_pos, last_ext->extLocation, |
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last_ext->extLength, 1); |
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count++; |
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} else udf_write_aext(inode, last_pos, last_ext->extLocation, last_ext->extLength, 1); |
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/* Managed to do everything necessary? */ if (!blocks) goto out; /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ last_ext->extLocation.logicalBlockNum = 0; |
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last_ext->extLocation.partitionReferenceNum = 0; add = (1 << (30 - sb->s_blocksize_bits)) - 1; last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | (add << sb->s_blocksize_bits); |
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/* Create enough extents to cover the whole hole */ while (blocks > add) { blocks -= add; if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
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last_ext->extLength, 1) == -1) |
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return -1; count++; } if (blocks) { last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
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(blocks << sb->s_blocksize_bits); |
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if (udf_add_aext(inode, last_pos, last_ext->extLocation, |
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last_ext->extLength, 1) == -1) |
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return -1; count++; } |
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out: |
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/* Do we have some preallocated blocks saved? */ if (prealloc_len) { |
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if (udf_add_aext(inode, last_pos, prealloc_loc, prealloc_len, 1) == -1) |
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return -1; last_ext->extLocation = prealloc_loc; last_ext->extLength = prealloc_len; count++; } /* last_pos should point to the last written extent... */ if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) last_pos->offset -= sizeof(short_ad); else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) last_pos->offset -= sizeof(long_ad); else return -1; return count; } |
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static struct buffer_head *inode_getblk(struct inode *inode, sector_t block, int *err, long *phys, int *new) |
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{ |
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static sector_t last_block; |
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struct buffer_head *result = NULL; |
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kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
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struct extent_position prev_epos, cur_epos, next_epos; |
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int count = 0, startnum = 0, endnum = 0; |
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uint32_t elen = 0, tmpelen; kernel_lb_addr eloc, tmpeloc; |
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int c = 1; |
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loff_t lbcount = 0, b_off = 0; uint32_t newblocknum, newblock; sector_t offset = 0; |
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int8_t etype; int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; |
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int lastblock = 0; |
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prev_epos.offset = udf_file_entry_alloc_offset(inode); prev_epos.block = UDF_I_LOCATION(inode); prev_epos.bh = NULL; cur_epos = next_epos = prev_epos; |
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b_off = (loff_t) block << inode->i_sb->s_blocksize_bits; |
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/* find the extent which contains the block we are looking for. |
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alternate between laarr[0] and laarr[1] for locations of the current extent, and the previous extent */ do { if (prev_epos.bh != cur_epos.bh) { |
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brelse(prev_epos.bh); get_bh(cur_epos.bh); |
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prev_epos.bh = cur_epos.bh; |
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} |
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if (cur_epos.bh != next_epos.bh) { |
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brelse(cur_epos.bh); get_bh(next_epos.bh); |
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cur_epos.bh = next_epos.bh; |
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} lbcount += elen; |
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prev_epos.block = cur_epos.block; cur_epos.block = next_epos.block; |
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prev_epos.offset = cur_epos.offset; cur_epos.offset = next_epos.offset; |
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if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1)) == -1) |
1da177e4c
|
500 501 502 503 504 505 506 507 508 |
break; c = !c; laarr[c].extLength = (etype << 30) | elen; laarr[c].extLocation = eloc; if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) pgoal = eloc.logicalBlockNum + |
cb00ea352
|
509 510 |
((elen + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
1da177e4c
|
511 |
|
cb00ea352
|
512 |
count++; |
1da177e4c
|
513 514 515 516 |
} while (lbcount + elen <= b_off); b_off -= lbcount; offset = b_off >> inode->i_sb->s_blocksize_bits; |
85d71244f
|
517 518 519 520 521 522 |
/* * Move prev_epos and cur_epos into indirect extent if we are at * the pointer to it */ udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); |
1da177e4c
|
523 524 |
/* if the extent is allocated and recorded, return the block |
cb00ea352
|
525 |
if the extent is not a multiple of the blocksize, round up */ |
1da177e4c
|
526 |
|
cb00ea352
|
527 528 |
if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { if (elen & (inode->i_sb->s_blocksize - 1)) { |
1da177e4c
|
529 |
elen = EXT_RECORDED_ALLOCATED | |
cb00ea352
|
530 531 |
((elen + inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize - 1)); |
ff116fc8d
|
532 |
etype = udf_write_aext(inode, &cur_epos, eloc, elen, 1); |
1da177e4c
|
533 |
} |
3bf25cb40
|
534 535 536 |
brelse(prev_epos.bh); brelse(cur_epos.bh); brelse(next_epos.bh); |
1da177e4c
|
537 538 539 540 |
newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); *phys = newblock; return NULL; } |
31170b6ad
|
541 542 |
last_block = block; /* Are we beyond EOF? */ |
cb00ea352
|
543 |
if (etype == -1) { |
31170b6ad
|
544 545 546 547 548 549 |
int ret; if (count) { if (c) laarr[0] = laarr[1]; startnum = 1; |
cb00ea352
|
550 |
} else { |
31170b6ad
|
551 |
/* Create a fake extent when there's not one */ |
cb00ea352
|
552 553 |
memset(&laarr[0].extLocation, 0x00, sizeof(kernel_lb_addr)); |
31170b6ad
|
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 |
laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; /* Will udf_extend_file() create real extent from a fake one? */ startnum = (offset > 0); } /* Create extents for the hole between EOF and offset */ ret = udf_extend_file(inode, &prev_epos, laarr, offset); if (ret == -1) { brelse(prev_epos.bh); brelse(cur_epos.bh); brelse(next_epos.bh); /* We don't really know the error here so we just make * something up */ *err = -ENOSPC; return NULL; } c = 0; offset = 0; count += ret; /* We are not covered by a preallocated extent? */ |
cb00ea352
|
573 574 |
if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != EXT_NOT_RECORDED_ALLOCATED) { |
31170b6ad
|
575 576 577 578 579 |
/* Is there any real extent? - otherwise we overwrite * the fake one... */ if (count) c = !c; laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
cb00ea352
|
580 581 582 583 584 |
inode->i_sb->s_blocksize; memset(&laarr[c].extLocation, 0x00, sizeof(kernel_lb_addr)); count++; endnum++; |
31170b6ad
|
585 |
} |
cb00ea352
|
586 |
endnum = c + 1; |
1da177e4c
|
587 |
lastblock = 1; |
cb00ea352
|
588 |
} else { |
1da177e4c
|
589 |
endnum = startnum = ((count > 2) ? 2 : count); |
31170b6ad
|
590 |
/* if the current extent is in position 0, swap it with the previous */ |
cb00ea352
|
591 |
if (!c && count != 1) { |
31170b6ad
|
592 593 594 595 596 |
laarr[2] = laarr[0]; laarr[0] = laarr[1]; laarr[1] = laarr[2]; c = 1; } |
1da177e4c
|
597 |
|
31170b6ad
|
598 |
/* if the current block is located in an extent, read the next extent */ |
cb00ea352
|
599 600 601 602 603 604 605 606 |
if ((etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0)) != -1) { laarr[c + 1].extLength = (etype << 30) | elen; laarr[c + 1].extLocation = eloc; count++; startnum++; endnum++; } else { |
1da177e4c
|
607 |
lastblock = 1; |
31170b6ad
|
608 |
} |
1da177e4c
|
609 |
} |
1da177e4c
|
610 611 |
/* if the current extent is not recorded but allocated, get the |
cb00ea352
|
612 |
block in the extent corresponding to the requested block */ |
1da177e4c
|
613 614 |
if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
cb00ea352
|
615 |
else { /* otherwise, allocate a new block */ |
1da177e4c
|
616 617 |
if (UDF_I_NEXT_ALLOC_BLOCK(inode) == block) goal = UDF_I_NEXT_ALLOC_GOAL(inode); |
cb00ea352
|
618 |
if (!goal) { |
1da177e4c
|
619 |
if (!(goal = pgoal)) |
cb00ea352
|
620 621 |
goal = UDF_I_LOCATION(inode).logicalBlockNum + 1; |
1da177e4c
|
622 623 624 |
} if (!(newblocknum = udf_new_block(inode->i_sb, inode, |
cb00ea352
|
625 626 627 |
UDF_I_LOCATION(inode). partitionReferenceNum, goal, err))) { |
3bf25cb40
|
628 |
brelse(prev_epos.bh); |
1da177e4c
|
629 630 631 632 633 634 635 |
*err = -ENOSPC; return NULL; } UDF_I_LENEXTENTS(inode) += inode->i_sb->s_blocksize; } /* if the extent the requsted block is located in contains multiple blocks, |
cb00ea352
|
636 637 |
split the extent into at most three extents. blocks prior to requested block, requested block, and blocks after requested block */ |
1da177e4c
|
638 639 640 641 642 643 644 645 646 647 648 |
udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); #ifdef UDF_PREALLOCATE /* preallocate blocks */ udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); #endif /* merge any continuous blocks in laarr */ udf_merge_extents(inode, laarr, &endnum); /* write back the new extents, inserting new extents if the new number |
cb00ea352
|
649 650 |
of extents is greater than the old number, and deleting extents if the new number of extents is less than the old number */ |
ff116fc8d
|
651 |
udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
1da177e4c
|
652 |
|
3bf25cb40
|
653 |
brelse(prev_epos.bh); |
1da177e4c
|
654 655 |
if (!(newblock = udf_get_pblock(inode->i_sb, newblocknum, |
cb00ea352
|
656 657 |
UDF_I_LOCATION(inode). partitionReferenceNum, 0))) { |
1da177e4c
|
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 |
return NULL; } *phys = newblock; *err = 0; *new = 1; UDF_I_NEXT_ALLOC_BLOCK(inode) = block; UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum; inode->i_ctime = current_fs_time(inode->i_sb); if (IS_SYNC(inode)) udf_sync_inode(inode); else mark_inode_dirty(inode); return result; } |
cb00ea352
|
673 674 675 676 |
static void udf_split_extents(struct inode *inode, int *c, int offset, int newblocknum, kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
1da177e4c
|
677 678 |
{ if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
cb00ea352
|
679 680 |
(laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
1da177e4c
|
681 682 |
int curr = *c; int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + |
cb00ea352
|
683 684 |
inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
1da177e4c
|
685 |
int8_t etype = (laarr[curr].extLength >> 30); |
cb00ea352
|
686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 |
if (blen == 1) ; else if (!offset || blen == offset + 1) { laarr[curr + 2] = laarr[curr + 1]; laarr[curr + 1] = laarr[curr]; } else { laarr[curr + 3] = laarr[curr + 1]; laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; } if (offset) { if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { udf_free_blocks(inode->i_sb, inode, laarr[curr].extLocation, 0, offset); laarr[curr].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | (offset << inode-> i_sb-> s_blocksize_bits); |
1da177e4c
|
705 |
laarr[curr].extLocation.logicalBlockNum = 0; |
cb00ea352
|
706 707 708 |
laarr[curr].extLocation.partitionReferenceNum = 0; } else |
1da177e4c
|
709 |
laarr[curr].extLength = (etype << 30) | |
cb00ea352
|
710 711 712 713 |
(offset << inode->i_sb->s_blocksize_bits); curr++; (*c)++; (*endnum)++; |
1da177e4c
|
714 |
} |
647bd61a5
|
715 |
|
1da177e4c
|
716 717 718 |
laarr[curr].extLocation.logicalBlockNum = newblocknum; if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) laarr[curr].extLocation.partitionReferenceNum = |
cb00ea352
|
719 |
UDF_I_LOCATION(inode).partitionReferenceNum; |
1da177e4c
|
720 |
laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
cb00ea352
|
721 722 |
inode->i_sb->s_blocksize; curr++; |
1da177e4c
|
723 |
|
cb00ea352
|
724 |
if (blen != offset + 1) { |
1da177e4c
|
725 |
if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
cb00ea352
|
726 727 728 729 730 731 732 |
laarr[curr].extLocation.logicalBlockNum += (offset + 1); laarr[curr].extLength = (etype << 30) | ((blen - (offset + 1)) << inode-> i_sb->s_blocksize_bits); curr++; (*endnum)++; |
1da177e4c
|
733 734 735 736 737 |
} } } static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, |
cb00ea352
|
738 739 |
kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
1da177e4c
|
740 741 |
{ int start, length = 0, currlength = 0, i; |
cb00ea352
|
742 |
if (*endnum >= (c + 1)) { |
1da177e4c
|
743 744 745 746 |
if (!lastblock) return; else start = c; |
cb00ea352
|
747 748 749 750 751 752 753 754 755 756 |
} else { if ((laarr[c + 1].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { start = c + 1; length = currlength = (((laarr[c + 1]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); } else |
1da177e4c
|
757 758 |
start = c; } |
cb00ea352
|
759 760 |
for (i = start + 1; i <= *endnum; i++) { if (i == *endnum) { |
1da177e4c
|
761 762 |
if (lastblock) length += UDF_DEFAULT_PREALLOC_BLOCKS; |
cb00ea352
|
763 764 765 766 767 768 |
} else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) length += (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
1da177e4c
|
769 770 771 |
else break; } |
cb00ea352
|
772 |
if (length) { |
1da177e4c
|
773 |
int next = laarr[start].extLocation.logicalBlockNum + |
cb00ea352
|
774 775 776 |
(((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
1da177e4c
|
777 |
int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
cb00ea352
|
778 779 780 781 782 783 784 785 786 787 788 |
laarr[start].extLocation. partitionReferenceNum, next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? length : UDF_DEFAULT_PREALLOC_BLOCKS) - currlength); if (numalloc) { if (start == (c + 1)) |
1da177e4c
|
789 |
laarr[start].extLength += |
cb00ea352
|
790 791 792 793 794 795 796 797 798 799 800 801 802 |
(numalloc << inode->i_sb->s_blocksize_bits); else { memmove(&laarr[c + 2], &laarr[c + 1], sizeof(long_ad) * (*endnum - (c + 1))); (*endnum)++; laarr[c + 1].extLocation.logicalBlockNum = next; laarr[c + 1].extLocation.partitionReferenceNum = laarr[c].extLocation.partitionReferenceNum; laarr[c + 1].extLength = EXT_NOT_RECORDED_ALLOCATED | (numalloc << inode->i_sb-> s_blocksize_bits); start = c + 1; |
1da177e4c
|
803 |
} |
cb00ea352
|
804 805 806 807 808 809 |
for (i = start + 1; numalloc && i < *endnum; i++) { int elen = ((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits; |
1da177e4c
|
810 |
|
cb00ea352
|
811 |
if (elen > numalloc) { |
1da177e4c
|
812 |
laarr[i].extLength -= |
cb00ea352
|
813 814 |
(numalloc << inode->i_sb-> s_blocksize_bits); |
1da177e4c
|
815 |
numalloc = 0; |
cb00ea352
|
816 |
} else { |
1da177e4c
|
817 |
numalloc -= elen; |
cb00ea352
|
818 819 820 821 822 823 824 |
if (*endnum > (i + 1)) memmove(&laarr[i], &laarr[i + 1], sizeof(long_ad) * (*endnum - (i + 1))); i--; (*endnum)--; |
1da177e4c
|
825 826 |
} } |
cb00ea352
|
827 828 |
UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits; |
1da177e4c
|
829 830 831 832 833 |
} } } static void udf_merge_extents(struct inode *inode, |
cb00ea352
|
834 835 |
kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) |
1da177e4c
|
836 837 |
{ int i; |
cb00ea352
|
838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 |
for (i = 0; i < (*endnum - 1); i++) { if ((laarr[i].extLength >> 30) == (laarr[i + 1].extLength >> 30)) { if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || ((laarr[i + 1].extLocation.logicalBlockNum - laarr[i].extLocation.logicalBlockNum) == (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits))) { if (((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + (laarr[i + 1]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { laarr[i + 1].extLength = (laarr[i + 1].extLength - (laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + UDF_EXTENT_LENGTH_MASK) & ~(inode-> i_sb-> s_blocksize - 1); laarr[i].extLength = (laarr[i]. extLength & UDF_EXTENT_FLAG_MASK) + (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; laarr[i + 1].extLocation.logicalBlockNum = laarr[i].extLocation. logicalBlockNum + ((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) >> inode-> i_sb->s_blocksize_bits); } else { laarr[i].extLength = laarr[i + 1].extLength + (((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize - 1)); if (*endnum > (i + 2)) memmove(&laarr[i + 1], &laarr[i + 2], sizeof(long_ad) * (*endnum - (i + 2))); i--; (*endnum)--; |
1da177e4c
|
893 894 |
} } |
cb00ea352
|
895 896 897 898 899 900 901 902 903 904 905 |
} else if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) && ((laarr[i + 1].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, ((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
1da177e4c
|
906 907 908 909 |
laarr[i].extLocation.logicalBlockNum = 0; laarr[i].extLocation.partitionReferenceNum = 0; if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + |
cb00ea352
|
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 |
(laarr[i + 1].extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { laarr[i + 1].extLength = (laarr[i + 1].extLength - (laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb-> s_blocksize - 1); laarr[i].extLength = (laarr[i]. extLength & UDF_EXTENT_FLAG_MASK) + (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; } else { laarr[i].extLength = laarr[i + 1].extLength + (((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize - 1)); if (*endnum > (i + 2)) memmove(&laarr[i + 1], &laarr[i + 2], sizeof(long_ad) * (*endnum - (i + 2))); i--; (*endnum)--; |
1da177e4c
|
937 |
} |
cb00ea352
|
938 939 940 941 942 943 944 945 |
} else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, ((laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); |
1da177e4c
|
946 947 |
laarr[i].extLocation.logicalBlockNum = 0; laarr[i].extLocation.partitionReferenceNum = 0; |
cb00ea352
|
948 949 950 951 |
laarr[i].extLength = (laarr[i]. extLength & UDF_EXTENT_LENGTH_MASK) | EXT_NOT_RECORDED_NOT_ALLOCATED; |
1da177e4c
|
952 953 954 955 956 |
} } } static void udf_update_extents(struct inode *inode, |
cb00ea352
|
957 958 959 |
kernel_long_ad laarr[EXTENT_MERGE_SIZE], int startnum, int endnum, struct extent_position *epos) |
1da177e4c
|
960 961 962 963 |
{ int start = 0, i; kernel_lb_addr tmploc; uint32_t tmplen; |
cb00ea352
|
964 965 |
if (startnum > endnum) { for (i = 0; i < (startnum - endnum); i++) |
ff116fc8d
|
966 |
udf_delete_aext(inode, *epos, laarr[i].extLocation, |
cb00ea352
|
967 968 969 |
laarr[i].extLength); } else if (startnum < endnum) { for (i = 0; i < (endnum - startnum); i++) { |
ff116fc8d
|
970 |
udf_insert_aext(inode, *epos, laarr[i].extLocation, |
cb00ea352
|
971 |
laarr[i].extLength); |
ff116fc8d
|
972 |
udf_next_aext(inode, epos, &laarr[i].extLocation, |
cb00ea352
|
973 974 |
&laarr[i].extLength, 1); start++; |
1da177e4c
|
975 976 |
} } |
cb00ea352
|
977 |
for (i = start; i < endnum; i++) { |
ff116fc8d
|
978 979 |
udf_next_aext(inode, epos, &tmploc, &tmplen, 0); udf_write_aext(inode, epos, laarr[i].extLocation, |
cb00ea352
|
980 |
laarr[i].extLength, 1); |
1da177e4c
|
981 982 |
} } |
cb00ea352
|
983 984 |
struct buffer_head *udf_bread(struct inode *inode, int block, int create, int *err) |
1da177e4c
|
985 |
{ |
cb00ea352
|
986 |
struct buffer_head *bh = NULL; |
1da177e4c
|
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
bh = udf_getblk(inode, block, create, err); if (!bh) return NULL; if (buffer_uptodate(bh)) return bh; ll_rw_block(READ, 1, &bh); wait_on_buffer(bh); if (buffer_uptodate(bh)) return bh; brelse(bh); *err = -EIO; return NULL; } |
cb00ea352
|
1002 |
void udf_truncate(struct inode *inode) |
1da177e4c
|
1003 1004 1005 1006 1007 |
{ int offset; int err; if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
cb00ea352
|
1008 |
S_ISLNK(inode->i_mode))) |
1da177e4c
|
1009 1010 1011 1012 1013 |
return; if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) return; lock_kernel(); |
cb00ea352
|
1014 1015 1016 |
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + inode->i_size)) { |
1da177e4c
|
1017 |
udf_expand_file_adinicb(inode, inode->i_size, &err); |
cb00ea352
|
1018 |
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) { |
1da177e4c
|
1019 1020 1021 |
inode->i_size = UDF_I_LENALLOC(inode); unlock_kernel(); return; |
cb00ea352
|
1022 |
} else |
1da177e4c
|
1023 |
udf_truncate_extents(inode); |
cb00ea352
|
1024 |
} else { |
1da177e4c
|
1025 |
offset = inode->i_size & (inode->i_sb->s_blocksize - 1); |
cb00ea352
|
1026 1027 1028 1029 |
memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, 0x00, inode->i_sb->s_blocksize - offset - udf_file_entry_alloc_offset(inode)); |
1da177e4c
|
1030 1031 |
UDF_I_LENALLOC(inode) = inode->i_size; } |
cb00ea352
|
1032 1033 1034 |
} else { block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); |
1da177e4c
|
1035 |
udf_truncate_extents(inode); |
647bd61a5
|
1036 |
} |
1da177e4c
|
1037 1038 1039 |
inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); if (IS_SYNC(inode)) |
cb00ea352
|
1040 |
udf_sync_inode(inode); |
1da177e4c
|
1041 1042 1043 1044 |
else mark_inode_dirty(inode); unlock_kernel(); } |
cb00ea352
|
1045 |
static void __udf_read_inode(struct inode *inode) |
1da177e4c
|
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 |
{ struct buffer_head *bh = NULL; struct fileEntry *fe; uint16_t ident; /* * Set defaults, but the inode is still incomplete! * Note: get_new_inode() sets the following on a new inode: * i_sb = sb * i_no = ino * i_flags = sb->s_flags * i_state = 0 * clean_inode(): zero fills and sets * i_count = 1 * i_nlink = 1 * i_op = NULL; */ |
1da177e4c
|
1063 |
bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); |
cb00ea352
|
1064 |
if (!bh) { |
1da177e4c
|
1065 1066 |
printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed !bh ", |
cb00ea352
|
1067 |
inode->i_ino); |
1da177e4c
|
1068 1069 1070 1071 1072 |
make_bad_inode(inode); return; } if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && |
cb00ea352
|
1073 1074 1075 1076 1077 |
ident != TAG_IDENT_USE) { printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d ", inode->i_ino, ident); |
3bf25cb40
|
1078 |
brelse(bh); |
1da177e4c
|
1079 1080 1081 1082 1083 |
make_bad_inode(inode); return; } fe = (struct fileEntry *)bh->b_data; |
cb00ea352
|
1084 |
if (le16_to_cpu(fe->icbTag.strategyType) == 4096) { |
1da177e4c
|
1085 1086 |
struct buffer_head *ibh = NULL, *nbh = NULL; struct indirectEntry *ie; |
cb00ea352
|
1087 1088 1089 1090 1091 |
ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident); if (ident == TAG_IDENT_IE) { if (ibh) { |
1da177e4c
|
1092 1093 |
kernel_lb_addr loc; ie = (struct indirectEntry *)ibh->b_data; |
647bd61a5
|
1094 |
|
1da177e4c
|
1095 |
loc = lelb_to_cpu(ie->indirectICB.extLocation); |
647bd61a5
|
1096 1097 |
if (ie->indirectICB.extLength && |
cb00ea352
|
1098 1099 1100 1101 1102 1103 1104 1105 |
(nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident))) { if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) { memcpy(&UDF_I_LOCATION(inode), &loc, sizeof(kernel_lb_addr)); |
3bf25cb40
|
1106 1107 1108 |
brelse(bh); brelse(ibh); brelse(nbh); |
1da177e4c
|
1109 1110 |
__udf_read_inode(inode); return; |
cb00ea352
|
1111 |
} else { |
3bf25cb40
|
1112 1113 |
brelse(nbh); brelse(ibh); |
1da177e4c
|
1114 |
} |
cb00ea352
|
1115 |
} else |
3bf25cb40
|
1116 |
brelse(ibh); |
1da177e4c
|
1117 |
} |
cb00ea352
|
1118 |
} else |
3bf25cb40
|
1119 |
brelse(ibh); |
cb00ea352
|
1120 |
} else if (le16_to_cpu(fe->icbTag.strategyType) != 4) { |
1da177e4c
|
1121 1122 |
printk(KERN_ERR "udf: unsupported strategy type: %d ", |
cb00ea352
|
1123 |
le16_to_cpu(fe->icbTag.strategyType)); |
3bf25cb40
|
1124 |
brelse(bh); |
1da177e4c
|
1125 1126 1127 1128 |
make_bad_inode(inode); return; } udf_fill_inode(inode, bh); |
31170b6ad
|
1129 |
|
3bf25cb40
|
1130 |
brelse(bh); |
1da177e4c
|
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 |
} static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) { struct fileEntry *fe; struct extendedFileEntry *efe; time_t convtime; long convtime_usec; int offset; fe = (struct fileEntry *)bh->b_data; efe = (struct extendedFileEntry *)bh->b_data; if (le16_to_cpu(fe->icbTag.strategyType) == 4) UDF_I_STRAT4096(inode) = 0; |
cb00ea352
|
1146 |
else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */ |
1da177e4c
|
1147 |
UDF_I_STRAT4096(inode) = 1; |
cb00ea352
|
1148 1149 |
UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK; |
1da177e4c
|
1150 1151 1152 1153 1154 1155 |
UDF_I_UNIQUE(inode) = 0; UDF_I_LENEATTR(inode) = 0; UDF_I_LENEXTENTS(inode) = 0; UDF_I_LENALLOC(inode) = 0; UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; UDF_I_NEXT_ALLOC_GOAL(inode) = 0; |
cb00ea352
|
1156 |
if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) { |
1da177e4c
|
1157 1158 |
UDF_I_EFE(inode) = 1; UDF_I_USE(inode) = 0; |
cb00ea352
|
1159 1160 1161 1162 |
if (udf_alloc_i_data (inode, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry))) { |
647bd61a5
|
1163 1164 1165 |
make_bad_inode(inode); return; } |
cb00ea352
|
1166 1167 1168 1169 1170 |
memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) { |
1da177e4c
|
1171 1172 |
UDF_I_EFE(inode) = 0; UDF_I_USE(inode) = 0; |
cb00ea352
|
1173 1174 1175 |
if (udf_alloc_i_data (inode, inode->i_sb->s_blocksize - sizeof(struct fileEntry))) { |
647bd61a5
|
1176 1177 1178 |
make_bad_inode(inode); return; } |
cb00ea352
|
1179 1180 1181 |
memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); } else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) { |
1da177e4c
|
1182 1183 1184 |
UDF_I_EFE(inode) = 0; UDF_I_USE(inode) = 1; UDF_I_LENALLOC(inode) = |
cb00ea352
|
1185 1186 1187 1188 1189 1190 |
le32_to_cpu(((struct unallocSpaceEntry *)bh->b_data)-> lengthAllocDescs); if (udf_alloc_i_data (inode, inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry))) { |
647bd61a5
|
1191 1192 1193 |
make_bad_inode(inode); return; } |
cb00ea352
|
1194 1195 1196 1197 |
memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); |
1da177e4c
|
1198 1199 1200 1201 |
return; } inode->i_uid = le32_to_cpu(fe->uid); |
4d6660eb3
|
1202 |
if (inode->i_uid == -1 || UDF_QUERY_FLAG(inode->i_sb, |
cb00ea352
|
1203 |
UDF_FLAG_UID_IGNORE)) |
4d6660eb3
|
1204 |
inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
1da177e4c
|
1205 1206 |
inode->i_gid = le32_to_cpu(fe->gid); |
4d6660eb3
|
1207 |
if (inode->i_gid == -1 || UDF_QUERY_FLAG(inode->i_sb, |
cb00ea352
|
1208 |
UDF_FLAG_GID_IGNORE)) |
4d6660eb3
|
1209 |
inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
1da177e4c
|
1210 1211 1212 1213 |
inode->i_nlink = le16_to_cpu(fe->fileLinkCount); if (!inode->i_nlink) inode->i_nlink = 1; |
647bd61a5
|
1214 |
|
1da177e4c
|
1215 1216 1217 1218 1219 |
inode->i_size = le64_to_cpu(fe->informationLength); UDF_I_LENEXTENTS(inode) = inode->i_size; inode->i_mode = udf_convert_permissions(fe); inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; |
cb00ea352
|
1220 |
if (UDF_I_EFE(inode) == 0) { |
1da177e4c
|
1221 |
inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
cb00ea352
|
1222 |
(inode->i_sb->s_blocksize_bits - 9); |
1da177e4c
|
1223 |
|
cb00ea352
|
1224 1225 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(fe->accessTime))) { |
1da177e4c
|
1226 1227 |
inode->i_atime.tv_sec = convtime; inode->i_atime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1228 |
} else { |
1da177e4c
|
1229 1230 |
inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); } |
cb00ea352
|
1231 1232 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(fe->modificationTime))) { |
1da177e4c
|
1233 1234 |
inode->i_mtime.tv_sec = convtime; inode->i_mtime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1235 |
} else { |
1da177e4c
|
1236 1237 |
inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); } |
cb00ea352
|
1238 1239 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(fe->attrTime))) { |
1da177e4c
|
1240 1241 |
inode->i_ctime.tv_sec = convtime; inode->i_ctime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1242 |
} else { |
1da177e4c
|
1243 1244 1245 1246 1247 1248 1249 |
inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); } UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID); UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr); UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs); offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode); |
cb00ea352
|
1250 |
} else { |
647bd61a5
|
1251 |
inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
cb00ea352
|
1252 |
(inode->i_sb->s_blocksize_bits - 9); |
1da177e4c
|
1253 |
|
cb00ea352
|
1254 1255 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(efe->accessTime))) { |
1da177e4c
|
1256 1257 |
inode->i_atime.tv_sec = convtime; inode->i_atime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1258 |
} else { |
1da177e4c
|
1259 1260 |
inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); } |
cb00ea352
|
1261 1262 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(efe->modificationTime))) { |
1da177e4c
|
1263 1264 |
inode->i_mtime.tv_sec = convtime; inode->i_mtime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1265 |
} else { |
1da177e4c
|
1266 1267 |
inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); } |
cb00ea352
|
1268 1269 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(efe->createTime))) { |
1da177e4c
|
1270 1271 |
UDF_I_CRTIME(inode).tv_sec = convtime; UDF_I_CRTIME(inode).tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1272 |
} else { |
1da177e4c
|
1273 1274 |
UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb); } |
cb00ea352
|
1275 1276 |
if (udf_stamp_to_time(&convtime, &convtime_usec, lets_to_cpu(efe->attrTime))) { |
1da177e4c
|
1277 1278 |
inode->i_ctime.tv_sec = convtime; inode->i_ctime.tv_nsec = convtime_usec * 1000; |
cb00ea352
|
1279 |
} else { |
1da177e4c
|
1280 1281 1282 1283 1284 1285 |
inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); } UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID); UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr); UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs); |
cb00ea352
|
1286 1287 |
offset = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode); |
1da177e4c
|
1288 |
} |
cb00ea352
|
1289 1290 |
switch (fe->icbTag.fileType) { case ICBTAG_FILE_TYPE_DIRECTORY: |
1da177e4c
|
1291 1292 1293 1294 |
{ inode->i_op = &udf_dir_inode_operations; inode->i_fop = &udf_dir_operations; inode->i_mode |= S_IFDIR; |
d8c76e6f4
|
1295 |
inc_nlink(inode); |
1da177e4c
|
1296 1297 |
break; } |
cb00ea352
|
1298 1299 1300 |
case ICBTAG_FILE_TYPE_REALTIME: case ICBTAG_FILE_TYPE_REGULAR: case ICBTAG_FILE_TYPE_UNDEF: |
1da177e4c
|
1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 |
{ if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) inode->i_data.a_ops = &udf_adinicb_aops; else inode->i_data.a_ops = &udf_aops; inode->i_op = &udf_file_inode_operations; inode->i_fop = &udf_file_operations; inode->i_mode |= S_IFREG; break; } |
cb00ea352
|
1311 |
case ICBTAG_FILE_TYPE_BLOCK: |
1da177e4c
|
1312 1313 1314 1315 |
{ inode->i_mode |= S_IFBLK; break; } |
cb00ea352
|
1316 |
case ICBTAG_FILE_TYPE_CHAR: |
1da177e4c
|
1317 1318 1319 1320 |
{ inode->i_mode |= S_IFCHR; break; } |
cb00ea352
|
1321 |
case ICBTAG_FILE_TYPE_FIFO: |
1da177e4c
|
1322 1323 1324 1325 |
{ init_special_inode(inode, inode->i_mode | S_IFIFO, 0); break; } |
cb00ea352
|
1326 |
case ICBTAG_FILE_TYPE_SOCKET: |
1da177e4c
|
1327 1328 1329 1330 |
{ init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); break; } |
cb00ea352
|
1331 |
case ICBTAG_FILE_TYPE_SYMLINK: |
1da177e4c
|
1332 1333 1334 |
{ inode->i_data.a_ops = &udf_symlink_aops; inode->i_op = &page_symlink_inode_operations; |
cb00ea352
|
1335 |
inode->i_mode = S_IFLNK | S_IRWXUGO; |
1da177e4c
|
1336 1337 |
break; } |
cb00ea352
|
1338 |
default: |
1da177e4c
|
1339 |
{ |
cb00ea352
|
1340 1341 1342 1343 |
printk(KERN_ERR "udf: udf_fill_inode(ino %ld) failed unknown file type=%d ", inode->i_ino, fe->icbTag.fileType); |
1da177e4c
|
1344 1345 1346 1347 |
make_bad_inode(inode); return; } } |
cb00ea352
|
1348 1349 1350 |
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { struct deviceSpec *dsea = (struct deviceSpec *) udf_get_extendedattr(inode, 12, 1); |
1da177e4c
|
1351 |
|
cb00ea352
|
1352 1353 1354 1355 1356 1357 |
if (dsea) { init_special_inode(inode, inode->i_mode, MKDEV(le32_to_cpu (dsea->majorDeviceIdent), le32_to_cpu(dsea-> minorDeviceIdent))); |
1da177e4c
|
1358 |
/* Developer ID ??? */ |
cb00ea352
|
1359 |
} else { |
1da177e4c
|
1360 1361 1362 1363 |
make_bad_inode(inode); } } } |
647bd61a5
|
1364 1365 1366 |
static int udf_alloc_i_data(struct inode *inode, size_t size) { UDF_I_DATA(inode) = kmalloc(size, GFP_KERNEL); |
cb00ea352
|
1367 1368 1369 1370 |
if (!UDF_I_DATA(inode)) { printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) no free memory ", |
647bd61a5
|
1371 1372 1373 1374 1375 1376 |
inode->i_ino); return -ENOMEM; } return 0; } |
cb00ea352
|
1377 |
static mode_t udf_convert_permissions(struct fileEntry *fe) |
1da177e4c
|
1378 1379 1380 1381 1382 1383 1384 |
{ mode_t mode; uint32_t permissions; uint32_t flags; permissions = le32_to_cpu(fe->permissions); flags = le16_to_cpu(fe->icbTag.flags); |
cb00ea352
|
1385 1386 1387 1388 1389 1390 |
mode = ((permissions) & S_IRWXO) | ((permissions >> 2) & S_IRWXG) | ((permissions >> 4) & S_IRWXU) | ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); |
1da177e4c
|
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 |
return mode; } /* * udf_write_inode * * PURPOSE * Write out the specified inode. * * DESCRIPTION * This routine is called whenever an inode is synced. * Currently this routine is just a placeholder. * * HISTORY * July 1, 1997 - Andrew E. Mileski * Written, tested, and released. */ |
cb00ea352
|
1409 |
int udf_write_inode(struct inode *inode, int sync) |
1da177e4c
|
1410 1411 1412 1413 1414 1415 1416 |
{ int ret; lock_kernel(); ret = udf_update_inode(inode, sync); unlock_kernel(); return ret; } |
cb00ea352
|
1417 |
int udf_sync_inode(struct inode *inode) |
1da177e4c
|
1418 1419 1420 |
{ return udf_update_inode(inode, 1); } |
cb00ea352
|
1421 |
static int udf_update_inode(struct inode *inode, int do_sync) |
1da177e4c
|
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 |
{ struct buffer_head *bh = NULL; struct fileEntry *fe; struct extendedFileEntry *efe; uint32_t udfperms; uint16_t icbflags; uint16_t crclen; int i; kernel_timestamp cpu_time; int err = 0; bh = udf_tread(inode->i_sb, |
cb00ea352
|
1434 1435 |
udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0)); |
1da177e4c
|
1436 |
|
cb00ea352
|
1437 |
if (!bh) { |
1da177e4c
|
1438 1439 1440 1441 1442 1443 1444 1445 1446 |
udf_debug("bread failure "); return -EIO; } memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); fe = (struct fileEntry *)bh->b_data; efe = (struct extendedFileEntry *)bh->b_data; |
cb00ea352
|
1447 |
if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) { |
1da177e4c
|
1448 |
struct unallocSpaceEntry *use = |
cb00ea352
|
1449 |
(struct unallocSpaceEntry *)bh->b_data; |
1da177e4c
|
1450 1451 |
use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); |
cb00ea352
|
1452 1453 1454 1455 1456 1457 1458 1459 1460 |
memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); crclen = sizeof(struct unallocSpaceEntry) + UDF_I_LENALLOC(inode) - sizeof(tag); use->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); |
1da177e4c
|
1461 |
use->descTag.descCRCLength = cpu_to_le16(crclen); |
cb00ea352
|
1462 1463 |
use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + sizeof(tag), crclen, 0)); |
1da177e4c
|
1464 1465 |
use->descTag.tagChecksum = 0; |
cb00ea352
|
1466 |
for (i = 0; i < 16; i++) |
1da177e4c
|
1467 |
if (i != 4) |
cb00ea352
|
1468 1469 |
use->descTag.tagChecksum += ((uint8_t *) & (use->descTag))[i]; |
1da177e4c
|
1470 1471 |
mark_buffer_dirty(bh); |
3bf25cb40
|
1472 |
brelse(bh); |
1da177e4c
|
1473 1474 |
return err; } |
4d6660eb3
|
1475 1476 |
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) fe->uid = cpu_to_le32(-1); |
cb00ea352
|
1477 1478 |
else fe->uid = cpu_to_le32(inode->i_uid); |
1da177e4c
|
1479 |
|
4d6660eb3
|
1480 1481 |
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) fe->gid = cpu_to_le32(-1); |
cb00ea352
|
1482 1483 |
else fe->gid = cpu_to_le32(inode->i_gid); |
1da177e4c
|
1484 |
|
cb00ea352
|
1485 1486 |
udfperms = ((inode->i_mode & S_IRWXO)) | ((inode->i_mode & S_IRWXG) << 2) | ((inode->i_mode & S_IRWXU) << 4); |
1da177e4c
|
1487 |
|
cb00ea352
|
1488 1489 1490 1491 |
udfperms |= (le32_to_cpu(fe->permissions) & (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | FE_PERM_G_DELETE | FE_PERM_G_CHATTR | FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); |
1da177e4c
|
1492 1493 1494 1495 1496 1497 1498 1499 |
fe->permissions = cpu_to_le32(udfperms); if (S_ISDIR(inode->i_mode)) fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); else fe->fileLinkCount = cpu_to_le16(inode->i_nlink); fe->informationLength = cpu_to_le64(inode->i_size); |
cb00ea352
|
1500 |
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
1da177e4c
|
1501 |
regid *eid; |
cb00ea352
|
1502 1503 |
struct deviceSpec *dsea = (struct deviceSpec *) udf_get_extendedattr(inode, 12, 1); |
1da177e4c
|
1504 |
|
cb00ea352
|
1505 |
if (!dsea) { |
1da177e4c
|
1506 |
dsea = (struct deviceSpec *) |
cb00ea352
|
1507 1508 1509 |
udf_add_extendedattr(inode, sizeof(struct deviceSpec) + sizeof(regid), 12, 0x3); |
1da177e4c
|
1510 1511 |
dsea->attrType = cpu_to_le32(12); dsea->attrSubtype = 1; |
cb00ea352
|
1512 1513 1514 |
dsea->attrLength = cpu_to_le32(sizeof(struct deviceSpec) + sizeof(regid)); |
1da177e4c
|
1515 1516 |
dsea->impUseLength = cpu_to_le32(sizeof(regid)); } |
cb00ea352
|
1517 |
eid = (regid *) dsea->impUse; |
1da177e4c
|
1518 1519 1520 1521 1522 1523 1524 |
memset(eid, 0, sizeof(regid)); strcpy(eid->ident, UDF_ID_DEVELOPER); eid->identSuffix[0] = UDF_OS_CLASS_UNIX; eid->identSuffix[1] = UDF_OS_ID_LINUX; dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); } |
cb00ea352
|
1525 1526 1527 1528 1529 1530 1531 |
if (UDF_I_EFE(inode) == 0) { memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); fe->logicalBlocksRecorded = cpu_to_le64((inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> (inode->i_sb->s_blocksize_bits - 9)); |
1da177e4c
|
1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 |
if (udf_time_to_stamp(&cpu_time, inode->i_atime)) fe->accessTime = cpu_to_lets(cpu_time); if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) fe->modificationTime = cpu_to_lets(cpu_time); if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) fe->attrTime = cpu_to_lets(cpu_time); memset(&(fe->impIdent), 0, sizeof(regid)); strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; fe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); crclen = sizeof(struct fileEntry); |
cb00ea352
|
1548 1549 1550 1551 1552 |
} else { memcpy(bh->b_data + sizeof(struct extendedFileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); |
1da177e4c
|
1553 |
efe->objectSize = cpu_to_le64(inode->i_size); |
cb00ea352
|
1554 1555 1556 1557 1558 1559 1560 1561 |
efe->logicalBlocksRecorded = cpu_to_le64((inode->i_blocks + (1 << (inode->i_sb-> s_blocksize_bits - 9)) - 1) >> (inode->i_sb-> s_blocksize_bits - 9)); |
1da177e4c
|
1562 1563 |
if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || |
cb00ea352
|
1564 1565 |
(UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) { |
1da177e4c
|
1566 1567 1568 |
UDF_I_CRTIME(inode) = inode->i_atime; } if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || |
cb00ea352
|
1569 1570 |
(UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) { |
1da177e4c
|
1571 1572 1573 |
UDF_I_CRTIME(inode) = inode->i_mtime; } if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || |
cb00ea352
|
1574 1575 |
(UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) { |
1da177e4c
|
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 |
UDF_I_CRTIME(inode) = inode->i_ctime; } if (udf_time_to_stamp(&cpu_time, inode->i_atime)) efe->accessTime = cpu_to_lets(cpu_time); if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) efe->modificationTime = cpu_to_lets(cpu_time); if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) efe->createTime = cpu_to_lets(cpu_time); if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) efe->attrTime = cpu_to_lets(cpu_time); memset(&(efe->impIdent), 0, sizeof(regid)); strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; efe->uniqueID = cpu_to_le64(UDF_I_UNIQUE(inode)); efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); crclen = sizeof(struct extendedFileEntry); } |
cb00ea352
|
1598 |
if (UDF_I_STRAT4096(inode)) { |
1da177e4c
|
1599 1600 1601 |
fe->icbTag.strategyType = cpu_to_le16(4096); fe->icbTag.strategyParameter = cpu_to_le16(1); fe->icbTag.numEntries = cpu_to_le16(2); |
cb00ea352
|
1602 |
} else { |
1da177e4c
|
1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 |
fe->icbTag.strategyType = cpu_to_le16(4); fe->icbTag.numEntries = cpu_to_le16(1); } if (S_ISDIR(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; else if (S_ISREG(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; else if (S_ISLNK(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; else if (S_ISBLK(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; else if (S_ISCHR(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; else if (S_ISFIFO(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; else if (S_ISSOCK(inode->i_mode)) fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; |
cb00ea352
|
1621 1622 1623 1624 1625 1626 1627 |
icbflags = UDF_I_ALLOCTYPE(inode) | ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | (le16_to_cpu(fe->icbTag.flags) & ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); |
1da177e4c
|
1628 1629 1630 1631 1632 1633 1634 |
fe->icbTag.flags = cpu_to_le16(icbflags); if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) fe->descTag.descVersion = cpu_to_le16(3); else fe->descTag.descVersion = cpu_to_le16(2); fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); |
cb00ea352
|
1635 1636 |
fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); |
1da177e4c
|
1637 1638 |
crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); fe->descTag.descCRCLength = cpu_to_le16(crclen); |
cb00ea352
|
1639 1640 |
fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0)); |
1da177e4c
|
1641 1642 |
fe->descTag.tagChecksum = 0; |
cb00ea352
|
1643 |
for (i = 0; i < 16; i++) |
1da177e4c
|
1644 |
if (i != 4) |
cb00ea352
|
1645 1646 |
fe->descTag.tagChecksum += ((uint8_t *) & (fe->descTag))[i]; |
1da177e4c
|
1647 1648 1649 |
/* write the data blocks */ mark_buffer_dirty(bh); |
cb00ea352
|
1650 |
if (do_sync) { |
1da177e4c
|
1651 |
sync_dirty_buffer(bh); |
cb00ea352
|
1652 |
if (buffer_req(bh) && !buffer_uptodate(bh)) { |
1da177e4c
|
1653 1654 |
printk("IO error syncing udf inode [%s:%08lx] ", |
cb00ea352
|
1655 |
inode->i_sb->s_id, inode->i_ino); |
1da177e4c
|
1656 1657 1658 |
err = -EIO; } } |
3bf25cb40
|
1659 |
brelse(bh); |
1da177e4c
|
1660 1661 |
return err; } |
cb00ea352
|
1662 |
struct inode *udf_iget(struct super_block *sb, kernel_lb_addr ino) |
1da177e4c
|
1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 |
{ unsigned long block = udf_get_lb_pblock(sb, ino, 0); struct inode *inode = iget_locked(sb, block); if (!inode) return NULL; if (inode->i_state & I_NEW) { memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); __udf_read_inode(inode); unlock_new_inode(inode); } if (is_bad_inode(inode)) goto out_iput; |
cb00ea352
|
1678 1679 |
if (ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum)) { |
1da177e4c
|
1680 1681 |
udf_debug("block=%d, partition=%d out of range ", |
cb00ea352
|
1682 |
ino.logicalBlockNum, ino.partitionReferenceNum); |
1da177e4c
|
1683 1684 1685 1686 1687 |
make_bad_inode(inode); goto out_iput; } return inode; |
cb00ea352
|
1688 |
out_iput: |
1da177e4c
|
1689 1690 1691 |
iput(inode); return NULL; } |
cb00ea352
|
1692 1693 |
int8_t udf_add_aext(struct inode * inode, struct extent_position * epos, kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4c
|
1694 1695 1696 1697 1698 1699 1700 |
{ int adsize; short_ad *sad = NULL; long_ad *lad = NULL; struct allocExtDesc *aed; int8_t etype; uint8_t *ptr; |
ff116fc8d
|
1701 |
if (!epos->bh) |
cb00ea352
|
1702 1703 1704 |
ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
1da177e4c
|
1705 |
else |
ff116fc8d
|
1706 |
ptr = epos->bh->b_data + epos->offset; |
1da177e4c
|
1707 1708 1709 1710 1711 1712 1713 |
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) adsize = sizeof(short_ad); else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) adsize = sizeof(long_ad); else return -1; |
cb00ea352
|
1714 |
if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
1da177e4c
|
1715 1716 1717 |
char *sptr, *dptr; struct buffer_head *nbh; int err, loffset; |
ff116fc8d
|
1718 |
kernel_lb_addr obloc = epos->block; |
1da177e4c
|
1719 |
|
cb00ea352
|
1720 1721 1722 1723 1724 |
if (! (epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, obloc.partitionReferenceNum, obloc.logicalBlockNum, &err))) { |
1da177e4c
|
1725 1726 |
return -1; } |
cb00ea352
|
1727 1728 1729 1730 1731 |
if (! (nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, epos->block, 0)))) { |
1da177e4c
|
1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 |
return -1; } lock_buffer(nbh); memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); set_buffer_uptodate(nbh); unlock_buffer(nbh); mark_buffer_dirty_inode(nbh, inode); aed = (struct allocExtDesc *)(nbh->b_data); if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
cb00ea352
|
1742 1743 1744 |
aed->previousAllocExtLocation = cpu_to_le32(obloc.logicalBlockNum); if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
ff116fc8d
|
1745 |
loffset = epos->offset; |
1da177e4c
|
1746 1747 1748 1749 |
aed->lengthAllocDescs = cpu_to_le32(adsize); sptr = ptr - adsize; dptr = nbh->b_data + sizeof(struct allocExtDesc); memcpy(dptr, sptr, adsize); |
ff116fc8d
|
1750 |
epos->offset = sizeof(struct allocExtDesc) + adsize; |
cb00ea352
|
1751 |
} else { |
ff116fc8d
|
1752 |
loffset = epos->offset + adsize; |
1da177e4c
|
1753 1754 |
aed->lengthAllocDescs = cpu_to_le32(0); sptr = ptr; |
ff116fc8d
|
1755 |
epos->offset = sizeof(struct allocExtDesc); |
1da177e4c
|
1756 |
|
cb00ea352
|
1757 |
if (epos->bh) { |
ff116fc8d
|
1758 |
aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4c
|
1759 |
aed->lengthAllocDescs = |
cb00ea352
|
1760 1761 1762 1763 |
cpu_to_le32(le32_to_cpu (aed->lengthAllocDescs) + adsize); } else { |
1da177e4c
|
1764 1765 1766 1767 1768 1769 |
UDF_I_LENALLOC(inode) += adsize; mark_inode_dirty(inode); } } if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
cb00ea352
|
1770 |
epos->block.logicalBlockNum, sizeof(tag)); |
1da177e4c
|
1771 1772 |
else udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, |
cb00ea352
|
1773 1774 1775 |
epos->block.logicalBlockNum, sizeof(tag)); switch (UDF_I_ALLOCTYPE(inode)) { case ICBTAG_FLAG_AD_SHORT: |
1da177e4c
|
1776 |
{ |
cb00ea352
|
1777 1778 1779 1780 1781 1782 |
sad = (short_ad *) sptr; sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | inode->i_sb->s_blocksize); sad->extPosition = cpu_to_le32(epos->block.logicalBlockNum); |
1da177e4c
|
1783 1784 |
break; } |
cb00ea352
|
1785 |
case ICBTAG_FLAG_AD_LONG: |
1da177e4c
|
1786 |
{ |
cb00ea352
|
1787 1788 1789 1790 |
lad = (long_ad *) sptr; lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | inode->i_sb->s_blocksize); |
ff116fc8d
|
1791 |
lad->extLocation = cpu_to_lelb(epos->block); |
1da177e4c
|
1792 1793 1794 1795 |
memset(lad->impUse, 0x00, sizeof(lad->impUse)); break; } } |
cb00ea352
|
1796 1797 1798 |
if (epos->bh) { if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) |
ff116fc8d
|
1799 |
udf_update_tag(epos->bh->b_data, loffset); |
1da177e4c
|
1800 |
else |
cb00ea352
|
1801 1802 |
udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8d
|
1803 |
mark_buffer_dirty_inode(epos->bh, inode); |
3bf25cb40
|
1804 |
brelse(epos->bh); |
cb00ea352
|
1805 |
} else |
1da177e4c
|
1806 |
mark_inode_dirty(inode); |
ff116fc8d
|
1807 |
epos->bh = nbh; |
1da177e4c
|
1808 |
} |
ff116fc8d
|
1809 |
etype = udf_write_aext(inode, epos, eloc, elen, inc); |
1da177e4c
|
1810 |
|
cb00ea352
|
1811 |
if (!epos->bh) { |
1da177e4c
|
1812 1813 |
UDF_I_LENALLOC(inode) += adsize; mark_inode_dirty(inode); |
cb00ea352
|
1814 |
} else { |
ff116fc8d
|
1815 |
aed = (struct allocExtDesc *)epos->bh->b_data; |
1da177e4c
|
1816 |
aed->lengthAllocDescs = |
cb00ea352
|
1817 1818 1819 1820 1821 |
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) udf_update_tag(epos->bh->b_data, epos->offset + (inc ? 0 : adsize)); |
1da177e4c
|
1822 |
else |
cb00ea352
|
1823 1824 |
udf_update_tag(epos->bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8d
|
1825 |
mark_buffer_dirty_inode(epos->bh, inode); |
1da177e4c
|
1826 1827 1828 1829 |
} return etype; } |
cb00ea352
|
1830 1831 |
int8_t udf_write_aext(struct inode * inode, struct extent_position * epos, kernel_lb_addr eloc, uint32_t elen, int inc) |
1da177e4c
|
1832 1833 1834 |
{ int adsize; uint8_t *ptr; |
ff116fc8d
|
1835 |
if (!epos->bh) |
cb00ea352
|
1836 1837 1838 |
ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); |
1da177e4c
|
1839 |
else |
ff116fc8d
|
1840 |
ptr = epos->bh->b_data + epos->offset; |
1da177e4c
|
1841 |
|
cb00ea352
|
1842 1843 |
switch (UDF_I_ALLOCTYPE(inode)) { case ICBTAG_FLAG_AD_SHORT: |
1da177e4c
|
1844 |
{ |
cb00ea352
|
1845 |
short_ad *sad = (short_ad *) ptr; |
1da177e4c
|
1846 1847 1848 1849 1850 |
sad->extLength = cpu_to_le32(elen); sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); adsize = sizeof(short_ad); break; } |
cb00ea352
|
1851 |
case ICBTAG_FLAG_AD_LONG: |
1da177e4c
|
1852 |
{ |
cb00ea352
|
1853 |
long_ad *lad = (long_ad *) ptr; |
1da177e4c
|
1854 1855 1856 1857 1858 1859 |
lad->extLength = cpu_to_le32(elen); lad->extLocation = cpu_to_lelb(eloc); memset(lad->impUse, 0x00, sizeof(lad->impUse)); adsize = sizeof(long_ad); break; } |
cb00ea352
|
1860 1861 |
default: return -1; |
1da177e4c
|
1862 |
} |
cb00ea352
|
1863 1864 1865 1866 1867 |
if (epos->bh) { if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) { struct allocExtDesc *aed = (struct allocExtDesc *)epos->bh->b_data; |
ff116fc8d
|
1868 |
udf_update_tag(epos->bh->b_data, |
cb00ea352
|
1869 1870 |
le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc)); |
1da177e4c
|
1871 |
} |
ff116fc8d
|
1872 |
mark_buffer_dirty_inode(epos->bh, inode); |
cb00ea352
|
1873 |
} else |
1da177e4c
|
1874 1875 1876 |
mark_inode_dirty(inode); if (inc) |
ff116fc8d
|
1877 |
epos->offset += adsize; |
1da177e4c
|
1878 1879 |
return (elen >> 30); } |
cb00ea352
|
1880 1881 |
int8_t udf_next_aext(struct inode * inode, struct extent_position * epos, kernel_lb_addr * eloc, uint32_t * elen, int inc) |
1da177e4c
|
1882 1883 |
{ int8_t etype; |
ff116fc8d
|
1884 |
while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
cb00ea352
|
1885 |
(EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
ff116fc8d
|
1886 1887 |
epos->block = *eloc; epos->offset = sizeof(struct allocExtDesc); |
3bf25cb40
|
1888 |
brelse(epos->bh); |
cb00ea352
|
1889 1890 1891 1892 1893 |
if (! (epos->bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, epos->block, 0)))) { |
1da177e4c
|
1894 1895 |
udf_debug("reading block %d failed! ", |
cb00ea352
|
1896 1897 |
udf_get_lb_pblock(inode->i_sb, epos->block, 0)); |
1da177e4c
|
1898 1899 1900 1901 1902 1903 |
return -1; } } return etype; } |
cb00ea352
|
1904 1905 |
int8_t udf_current_aext(struct inode * inode, struct extent_position * epos, kernel_lb_addr * eloc, uint32_t * elen, int inc) |
1da177e4c
|
1906 1907 1908 1909 |
{ int alen; int8_t etype; uint8_t *ptr; |
cb00ea352
|
1910 |
if (!epos->bh) { |
ff116fc8d
|
1911 1912 |
if (!epos->offset) epos->offset = udf_file_entry_alloc_offset(inode); |
cb00ea352
|
1913 1914 1915 1916 1917 1918 |
ptr = UDF_I_DATA(inode) + epos->offset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); alen = udf_file_entry_alloc_offset(inode) + UDF_I_LENALLOC(inode); } else { |
ff116fc8d
|
1919 1920 1921 |
if (!epos->offset) epos->offset = sizeof(struct allocExtDesc); ptr = epos->bh->b_data + epos->offset; |
cb00ea352
|
1922 1923 1924 1925 |
alen = sizeof(struct allocExtDesc) + le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> lengthAllocDescs); |
1da177e4c
|
1926 |
} |
cb00ea352
|
1927 1928 |
switch (UDF_I_ALLOCTYPE(inode)) { case ICBTAG_FLAG_AD_SHORT: |
1da177e4c
|
1929 1930 |
{ short_ad *sad; |
cb00ea352
|
1931 1932 1933 1934 |
if (! (sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc))) |
1da177e4c
|
1935 1936 1937 1938 |
return -1; etype = le32_to_cpu(sad->extLength) >> 30; eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); |
cb00ea352
|
1939 1940 1941 1942 1943 |
eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; *elen = le32_to_cpu(sad-> extLength) & UDF_EXTENT_LENGTH_MASK; |
1da177e4c
|
1944 1945 |
break; } |
cb00ea352
|
1946 |
case ICBTAG_FLAG_AD_LONG: |
1da177e4c
|
1947 1948 |
{ long_ad *lad; |
cb00ea352
|
1949 1950 1951 |
if (! (lad = udf_get_filelongad(ptr, alen, &epos->offset, inc))) |
1da177e4c
|
1952 1953 1954 1955 |
return -1; etype = le32_to_cpu(lad->extLength) >> 30; *eloc = lelb_to_cpu(lad->extLocation); |
cb00ea352
|
1956 1957 1958 |
*elen = le32_to_cpu(lad-> extLength) & UDF_EXTENT_LENGTH_MASK; |
1da177e4c
|
1959 1960 |
break; } |
cb00ea352
|
1961 |
default: |
1da177e4c
|
1962 |
{ |
cb00ea352
|
1963 1964 1965 |
udf_debug("alloc_type = %d unsupported ", UDF_I_ALLOCTYPE(inode)); |
1da177e4c
|
1966 1967 1968 1969 1970 1971 1972 1973 |
return -1; } } return etype; } static int8_t |
ff116fc8d
|
1974 1975 |
udf_insert_aext(struct inode *inode, struct extent_position epos, kernel_lb_addr neloc, uint32_t nelen) |
1da177e4c
|
1976 1977 1978 1979 |
{ kernel_lb_addr oeloc; uint32_t oelen; int8_t etype; |
ff116fc8d
|
1980 |
if (epos.bh) |
3bf25cb40
|
1981 |
get_bh(epos.bh); |
1da177e4c
|
1982 |
|
cb00ea352
|
1983 |
while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
ff116fc8d
|
1984 |
udf_write_aext(inode, &epos, neloc, nelen, 1); |
1da177e4c
|
1985 1986 1987 1988 |
neloc = oeloc; nelen = (etype << 30) | oelen; } |
ff116fc8d
|
1989 |
udf_add_aext(inode, &epos, neloc, nelen, 1); |
3bf25cb40
|
1990 |
brelse(epos.bh); |
1da177e4c
|
1991 1992 |
return (nelen >> 30); } |
cb00ea352
|
1993 1994 |
int8_t udf_delete_aext(struct inode * inode, struct extent_position epos, kernel_lb_addr eloc, uint32_t elen) |
1da177e4c
|
1995 |
{ |
ff116fc8d
|
1996 1997 |
struct extent_position oepos; int adsize; |
1da177e4c
|
1998 1999 |
int8_t etype; struct allocExtDesc *aed; |
cb00ea352
|
2000 |
if (epos.bh) { |
3bf25cb40
|
2001 2002 |
get_bh(epos.bh); get_bh(epos.bh); |
1da177e4c
|
2003 2004 2005 2006 2007 2008 2009 2010 |
} if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) adsize = sizeof(short_ad); else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) adsize = sizeof(long_ad); else adsize = 0; |
ff116fc8d
|
2011 2012 |
oepos = epos; if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) |
1da177e4c
|
2013 |
return -1; |
cb00ea352
|
2014 |
while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
ff116fc8d
|
2015 |
udf_write_aext(inode, &oepos, eloc, (etype << 30) | elen, 1); |
cb00ea352
|
2016 |
if (oepos.bh != epos.bh) { |
ff116fc8d
|
2017 |
oepos.block = epos.block; |
3bf25cb40
|
2018 2019 |
brelse(oepos.bh); get_bh(epos.bh); |
ff116fc8d
|
2020 2021 |
oepos.bh = epos.bh; oepos.offset = epos.offset - adsize; |
1da177e4c
|
2022 2023 2024 2025 |
} } memset(&eloc, 0x00, sizeof(kernel_lb_addr)); elen = 0; |
cb00ea352
|
2026 |
if (epos.bh != oepos.bh) { |
ff116fc8d
|
2027 2028 2029 |
udf_free_blocks(inode->i_sb, inode, epos.block, 0, 1); udf_write_aext(inode, &oepos, eloc, elen, 1); udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea352
|
2030 |
if (!oepos.bh) { |
1da177e4c
|
2031 2032 |
UDF_I_LENALLOC(inode) -= (adsize * 2); mark_inode_dirty(inode); |
cb00ea352
|
2033 |
} else { |
ff116fc8d
|
2034 |
aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4c
|
2035 |
aed->lengthAllocDescs = |
cb00ea352
|
2036 2037 2038 2039 2040 2041 |
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2 * adsize)); if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) udf_update_tag(oepos.bh->b_data, oepos.offset - (2 * adsize)); |
1da177e4c
|
2042 |
else |
cb00ea352
|
2043 2044 |
udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8d
|
2045 |
mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4c
|
2046 |
} |
cb00ea352
|
2047 |
} else { |
ff116fc8d
|
2048 |
udf_write_aext(inode, &oepos, eloc, elen, 1); |
cb00ea352
|
2049 |
if (!oepos.bh) { |
1da177e4c
|
2050 2051 |
UDF_I_LENALLOC(inode) -= adsize; mark_inode_dirty(inode); |
cb00ea352
|
2052 |
} else { |
ff116fc8d
|
2053 |
aed = (struct allocExtDesc *)oepos.bh->b_data; |
1da177e4c
|
2054 |
aed->lengthAllocDescs = |
cb00ea352
|
2055 2056 2057 2058 2059 2060 |
cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize); if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) udf_update_tag(oepos.bh->b_data, epos.offset - adsize); |
1da177e4c
|
2061 |
else |
cb00ea352
|
2062 2063 |
udf_update_tag(oepos.bh->b_data, sizeof(struct allocExtDesc)); |
ff116fc8d
|
2064 |
mark_buffer_dirty_inode(oepos.bh, inode); |
1da177e4c
|
2065 2066 |
} } |
647bd61a5
|
2067 |
|
3bf25cb40
|
2068 2069 |
brelse(epos.bh); brelse(oepos.bh); |
1da177e4c
|
2070 2071 |
return (elen >> 30); } |
cb00ea352
|
2072 2073 2074 |
int8_t inode_bmap(struct inode * inode, sector_t block, struct extent_position * pos, kernel_lb_addr * eloc, uint32_t * elen, sector_t * offset) |
1da177e4c
|
2075 |
{ |
cb00ea352
|
2076 2077 |
loff_t lbcount = 0, bcount = (loff_t) block << inode->i_sb->s_blocksize_bits; |
1da177e4c
|
2078 |
int8_t etype; |
cb00ea352
|
2079 |
if (block < 0) { |
1da177e4c
|
2080 2081 2082 2083 |
printk(KERN_ERR "udf: inode_bmap: block < 0 "); return -1; } |
1da177e4c
|
2084 |
|
ff116fc8d
|
2085 2086 2087 |
pos->offset = 0; pos->block = UDF_I_LOCATION(inode); pos->bh = NULL; |
1da177e4c
|
2088 |
*elen = 0; |
1da177e4c
|
2089 |
|
cb00ea352
|
2090 2091 2092 2093 |
do { if ((etype = udf_next_aext(inode, pos, eloc, elen, 1)) == -1) { *offset = (bcount - lbcount) >> inode->i_sb->s_blocksize_bits; |
1da177e4c
|
2094 2095 2096 2097 2098 |
UDF_I_LENEXTENTS(inode) = lbcount; return -1; } lbcount += *elen; } while (lbcount <= bcount); |
60448b1d6
|
2099 |
*offset = (bcount + *elen - lbcount) >> inode->i_sb->s_blocksize_bits; |
1da177e4c
|
2100 2101 2102 |
return etype; } |
60448b1d6
|
2103 |
long udf_block_map(struct inode *inode, sector_t block) |
1da177e4c
|
2104 |
{ |
ff116fc8d
|
2105 2106 |
kernel_lb_addr eloc; uint32_t elen; |
60448b1d6
|
2107 |
sector_t offset; |
cb00ea352
|
2108 |
struct extent_position epos = { NULL, 0, {0, 0} }; |
1da177e4c
|
2109 2110 2111 |
int ret; lock_kernel(); |
cb00ea352
|
2112 2113 |
if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) |
60448b1d6
|
2114 |
ret = udf_get_lb_pblock(inode->i_sb, eloc, offset); |
1da177e4c
|
2115 2116 2117 2118 |
else ret = 0; unlock_kernel(); |
3bf25cb40
|
2119 |
brelse(epos.bh); |
1da177e4c
|
2120 2121 2122 2123 2124 2125 |
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) return udf_fixed_to_variable(ret); else return ret; } |