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udf: truncate: create function for updating of Allocation Ext Descriptor 

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
marcin.slusarz@gmail.com 2008-01-30 22:03:56 +01:00 committed by Jan Kara
parent 9de90b76eb
commit 456390de46
1 changed files with 23 additions and 33 deletions
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56
fs/udf/truncate.c
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@ -179,6 +179,24 @@ 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);
}
void udf_truncate_extents(struct inode *inode)
{
struct extent_position epos;
@ -186,7 +204,6 @@ void udf_truncate_extents(struct inode *inode)
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;
@ -229,24 +246,9 @@ void udf_truncate_extents(struct inode *inode)
} 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;
udf_update_tag(epos.bh->b_data,
len);
mark_buffer_dirty_inode(
epos.bh, inode);
}
} else
udf_update_alloc_ext_desc(inode,
&epos, lenalloc);
brelse(epos.bh);
epos.offset = sizeof(struct allocExtDesc);
epos.block = eloc;
@ -272,20 +274,8 @@ void udf_truncate_extents(struct inode *inode)
} 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
udf_update_alloc_ext_desc(inode, &epos, lenalloc);
} else if (inode->i_size) {
if (byte_offset) {
kernel_long_ad extent;