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Diffstat (limited to 'fs/udf/truncate.c')
-rw-r--r--fs/udf/truncate.c168
1 files changed, 70 insertions, 98 deletions
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index 225527cdc88..8a9657d7f7c 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -95,23 +95,21 @@ void udf_truncate_tail_extent(struct inode *inode)
lbcount += elen;
if (lbcount > inode->i_size) {
if (lbcount - inode->i_size >= inode->i_sb->s_blocksize)
- printk(KERN_WARNING
- "udf_truncate_tail_extent(): Too long "
- "extent after EOF in inode %u: i_size: "
- "%Ld lbcount: %Ld extent %u+%u\n",
- (unsigned)inode->i_ino,
- (long long)inode->i_size,
- (long long)lbcount,
- (unsigned)eloc.logicalBlockNum,
- (unsigned)elen);
+ udf_warn(inode->i_sb,
+ "Too long extent after EOF in inode %u: i_size: %lld lbcount: %lld extent %u+%u\n",
+ (unsigned)inode->i_ino,
+ (long long)inode->i_size,
+ (long long)lbcount,
+ (unsigned)eloc.logicalBlockNum,
+ (unsigned)elen);
nelen = elen - (lbcount - inode->i_size);
epos.offset -= adsize;
extent_trunc(inode, &epos, &eloc, etype, elen, nelen);
epos.offset += adsize;
if (udf_next_aext(inode, &epos, &eloc, &elen, 1) != -1)
- printk(KERN_ERR "udf_truncate_tail_extent(): "
- "Extent after EOF in inode %u.\n",
- (unsigned)inode->i_ino);
+ udf_err(inode->i_sb,
+ "Extent after EOF in inode %u\n",
+ (unsigned)inode->i_ino);
break;
}
}
@@ -197,6 +195,11 @@ static void udf_update_alloc_ext_desc(struct inode *inode,
mark_buffer_dirty_inode(epos->bh, inode);
}
+/*
+ * Truncate extents of inode to inode->i_size. This function can be used only
+ * for making file shorter. For making file longer, udf_extend_file() has to
+ * be used.
+ */
void udf_truncate_extents(struct inode *inode)
{
struct extent_position epos;
@@ -219,96 +222,65 @@ void udf_truncate_extents(struct inode *inode)
etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
byte_offset = (offset << sb->s_blocksize_bits) +
(inode->i_size & (sb->s_blocksize - 1));
- if (etype != -1) {
- epos.offset -= adsize;
- extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);
- epos.offset += adsize;
- if (byte_offset)
- lenalloc = epos.offset;
- else
- lenalloc = epos.offset - adsize;
-
- if (!epos.bh)
- lenalloc -= udf_file_entry_alloc_offset(inode);
- else
- lenalloc -= sizeof(struct allocExtDesc);
-
- while ((etype = udf_current_aext(inode, &epos, &eloc,
- &elen, 0)) != -1) {
- if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
- udf_write_aext(inode, &epos, &neloc, nelen, 0);
- if (indirect_ext_len) {
- /* We managed to free all extents in the
- * indirect extent - free it too */
- BUG_ON(!epos.bh);
- udf_free_blocks(sb, inode, &epos.block,
- 0, indirect_ext_len);
- } else if (!epos.bh) {
- iinfo->i_lenAlloc = lenalloc;
- mark_inode_dirty(inode);
- } else
- udf_update_alloc_ext_desc(inode,
- &epos, lenalloc);
- brelse(epos.bh);
- epos.offset = sizeof(struct allocExtDesc);
- epos.block = eloc;
- epos.bh = udf_tread(sb,
- udf_get_lb_pblock(sb, &eloc, 0));
- if (elen)
- indirect_ext_len =
- (elen + sb->s_blocksize - 1) >>
- sb->s_blocksize_bits;
- else
- indirect_ext_len = 1;
- } else {
- extent_trunc(inode, &epos, &eloc, etype,
- elen, 0);
- epos.offset += adsize;
- }
- }
+ if (etype == -1) {
+ /* We should extend the file? */
+ WARN_ON(byte_offset);
+ return;
+ }
+ epos.offset -= adsize;
+ extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);
+ epos.offset += adsize;
+ if (byte_offset)
+ lenalloc = epos.offset;
+ else
+ lenalloc = epos.offset - adsize;
- if (indirect_ext_len) {
- BUG_ON(!epos.bh);
- udf_free_blocks(sb, inode, &epos.block, 0,
- indirect_ext_len);
- } else if (!epos.bh) {
- iinfo->i_lenAlloc = lenalloc;
- mark_inode_dirty(inode);
- } else
- udf_update_alloc_ext_desc(inode, &epos, lenalloc);
- } else if (inode->i_size) {
- if (byte_offset) {
- struct kernel_long_ad extent;
+ if (!epos.bh)
+ lenalloc -= udf_file_entry_alloc_offset(inode);
+ else
+ lenalloc -= sizeof(struct allocExtDesc);
- /*
- * OK, there is not extent covering inode->i_size and
- * no extent above inode->i_size => truncate is
- * extending the file by 'offset' blocks.
- */
- if ((!epos.bh &&
- epos.offset ==
- udf_file_entry_alloc_offset(inode)) ||
- (epos.bh && epos.offset ==
- sizeof(struct allocExtDesc))) {
- /* File has no extents at all or has empty last
- * indirect extent! Create a fake extent... */
- extent.extLocation.logicalBlockNum = 0;
- extent.extLocation.partitionReferenceNum = 0;
- extent.extLength =
- EXT_NOT_RECORDED_NOT_ALLOCATED;
- } else {
- epos.offset -= adsize;
- etype = udf_next_aext(inode, &epos,
- &extent.extLocation,
- &extent.extLength, 0);
- extent.extLength |= etype << 30;
- }
- udf_extend_file(inode, &epos, &extent,
- offset +
- ((inode->i_size &
- (sb->s_blocksize - 1)) != 0));
+ while ((etype = udf_current_aext(inode, &epos, &eloc,
+ &elen, 0)) != -1) {
+ if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
+ udf_write_aext(inode, &epos, &neloc, nelen, 0);
+ if (indirect_ext_len) {
+ /* We managed to free all extents in the
+ * indirect extent - free it too */
+ BUG_ON(!epos.bh);
+ udf_free_blocks(sb, NULL, &epos.block,
+ 0, indirect_ext_len);
+ } else if (!epos.bh) {
+ iinfo->i_lenAlloc = lenalloc;
+ mark_inode_dirty(inode);
+ } else
+ udf_update_alloc_ext_desc(inode,
+ &epos, lenalloc);
+ brelse(epos.bh);
+ epos.offset = sizeof(struct allocExtDesc);
+ epos.block = eloc;
+ epos.bh = udf_tread(sb,
+ udf_get_lb_pblock(sb, &eloc, 0));
+ if (elen)
+ indirect_ext_len =
+ (elen + sb->s_blocksize - 1) >>
+ sb->s_blocksize_bits;
+ else
+ indirect_ext_len = 1;
+ } else {
+ extent_trunc(inode, &epos, &eloc, etype, elen, 0);
+ epos.offset += adsize;
}
}
+
+ if (indirect_ext_len) {
+ BUG_ON(!epos.bh);
+ udf_free_blocks(sb, NULL, &epos.block, 0, indirect_ext_len);
+ } else if (!epos.bh) {
+ iinfo->i_lenAlloc = lenalloc;
+ mark_inode_dirty(inode);
+ } else
+ udf_update_alloc_ext_desc(inode, &epos, lenalloc);
iinfo->i_lenExtents = inode->i_size;
brelse(epos.bh);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 12:55:00 +0000