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Diffstat (limited to 'fs/udf/truncate.c')
-rw-r--r--fs/udf/truncate.c249
1 files changed, 101 insertions, 148 deletions
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index fe61be17cda..8a9657d7f7c 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -22,17 +22,16 @@
#include "udfdecl.h"
#include <linux/fs.h>
#include <linux/mm.h>
-#include <linux/udf_fs.h>
#include <linux/buffer_head.h>
#include "udf_i.h"
#include "udf_sb.h"
static void extent_trunc(struct inode *inode, struct extent_position *epos,
- kernel_lb_addr eloc, int8_t etype, uint32_t elen,
+ struct kernel_lb_addr *eloc, int8_t etype, uint32_t elen,
uint32_t nelen)
{
- kernel_lb_addr neloc = {};
+ struct kernel_lb_addr neloc = {};
int last_block = (elen + inode->i_sb->s_blocksize - 1) >>
inode->i_sb->s_blocksize_bits;
int first_block = (nelen + inode->i_sb->s_blocksize - 1) >>
@@ -44,12 +43,12 @@ static void extent_trunc(struct inode *inode, struct extent_position *epos,
last_block);
etype = (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30);
} else
- neloc = eloc;
+ neloc = *eloc;
nelen = (etype << 30) | nelen;
}
if (elen != nelen) {
- udf_write_aext(inode, epos, neloc, nelen, 0);
+ udf_write_aext(inode, epos, &neloc, nelen, 0);
if (last_block - first_block > 0) {
if (etype == (EXT_RECORDED_ALLOCATED >> 30))
mark_inode_dirty(inode);
@@ -69,7 +68,7 @@ static void extent_trunc(struct inode *inode, struct extent_position *epos,
void udf_truncate_tail_extent(struct inode *inode)
{
struct extent_position epos = {};
- kernel_lb_addr eloc;
+ struct kernel_lb_addr eloc;
uint32_t elen, nelen;
uint64_t lbcount = 0;
int8_t etype = -1, netype;
@@ -84,9 +83,9 @@ void udf_truncate_tail_extent(struct inode *inode)
return;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
+ adsize = sizeof(struct short_ad);
else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- adsize = sizeof(long_ad);
+ adsize = sizeof(struct long_ad);
else
BUG();
@@ -96,23 +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);
+ 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;
}
}
@@ -125,7 +122,7 @@ void udf_truncate_tail_extent(struct inode *inode)
void udf_discard_prealloc(struct inode *inode)
{
struct extent_position epos = { NULL, 0, {0, 0} };
- kernel_lb_addr eloc;
+ struct kernel_lb_addr eloc;
uint32_t elen;
uint64_t lbcount = 0;
int8_t etype = -1, netype;
@@ -137,9 +134,9 @@ void udf_discard_prealloc(struct inode *inode)
return;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
+ adsize = sizeof(struct short_ad);
else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- adsize = sizeof(long_ad);
+ adsize = sizeof(struct long_ad);
else
adsize = 0;
@@ -153,7 +150,7 @@ void udf_discard_prealloc(struct inode *inode)
if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
epos.offset -= adsize;
lbcount -= elen;
- extent_trunc(inode, &epos, eloc, etype, elen, 0);
+ extent_trunc(inode, &epos, &eloc, etype, elen, 0);
if (!epos.bh) {
iinfo->i_lenAlloc =
epos.offset -
@@ -180,154 +177,110 @@ void udf_discard_prealloc(struct inode *inode)
brelse(epos.bh);
}
+static void udf_update_alloc_ext_desc(struct inode *inode,
+ struct extent_position *epos,
+ u32 lenalloc)
+{
+ struct super_block *sb = inode->i_sb;
+ struct udf_sb_info *sbi = UDF_SB(sb);
+
+ struct allocExtDesc *aed = (struct allocExtDesc *) (epos->bh->b_data);
+ int len = sizeof(struct allocExtDesc);
+
+ aed->lengthAllocDescs = cpu_to_le32(lenalloc);
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) || sbi->s_udfrev >= 0x0201)
+ len += lenalloc;
+
+ udf_update_tag(epos->bh->b_data, len);
+ 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;
- kernel_lb_addr eloc, neloc = {};
+ struct kernel_lb_addr eloc, neloc = {};
uint32_t elen, nelen = 0, indirect_ext_len = 0, lenalloc;
int8_t etype;
struct super_block *sb = inode->i_sb;
- struct udf_sb_info *sbi = UDF_SB(sb);
sector_t first_block = inode->i_size >> sb->s_blocksize_bits, offset;
loff_t byte_offset;
int adsize;
struct udf_inode_info *iinfo = UDF_I(inode);
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
+ adsize = sizeof(struct short_ad);
else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- adsize = sizeof(long_ad);
+ adsize = sizeof(struct long_ad);
else
BUG();
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 */
- if (!epos.bh)
- BUG();
- udf_free_blocks(sb, inode, epos.block,
- 0, indirect_ext_len);
- } else {
- if (!epos.bh) {
- iinfo->i_lenAlloc =
- lenalloc;
- mark_inode_dirty(inode);
- } else {
- struct allocExtDesc *aed =
- (struct allocExtDesc *)
- (epos.bh->b_data);
- int len =
- sizeof(struct allocExtDesc);
-
- aed->lengthAllocDescs =
- cpu_to_le32(lenalloc);
- if (!UDF_QUERY_FLAG(sb,
- UDF_FLAG_STRICT) ||
- sbi->s_udfrev >= 0x0201)
- len += lenalloc;
+ 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;
- udf_update_tag(epos.bh->b_data,
- len);
- mark_buffer_dirty_inode(
- epos.bh, inode);
- }
- }
- 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 (!epos.bh)
+ lenalloc -= udf_file_entry_alloc_offset(inode);
+ else
+ lenalloc -= sizeof(struct allocExtDesc);
- if (indirect_ext_len) {
- if (!epos.bh)
- BUG();
- udf_free_blocks(sb, inode, epos.block, 0,
- indirect_ext_len);
- } else {
- if (!epos.bh) {
+ 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 {
- struct allocExtDesc *aed =
- (struct allocExtDesc *)(epos.bh->b_data);
- aed->lengthAllocDescs = cpu_to_le32(lenalloc);
- if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT) ||
- sbi->s_udfrev >= 0x0201)
- udf_update_tag(epos.bh->b_data,
- lenalloc +
- sizeof(struct allocExtDesc));
- else
- udf_update_tag(epos.bh->b_data,
- sizeof(struct allocExtDesc));
- mark_buffer_dirty_inode(epos.bh, inode);
- }
- }
- } else if (inode->i_size) {
- if (byte_offset) {
- kernel_long_ad extent;
-
- /*
- * 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));
+ } 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 2025-11-10 01:53:45 +0000