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UDF: introduce struct extent_position

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Introduce a structure extent_position to store a position of an extent and
the corresponding buffer_head in one place.

Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Kara
2007-05-08 00:35:14 -07:00
committed by Linus Torvalds
parent 60448b1d6d
commit ff116fc8d1
8 changed files with 434 additions and 445 deletions
Download Patch File Download Diff File Expand all files Collapse all files

122
fs/udf/namei.c
View File

@@ -155,10 +155,10 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
uint8_t lfi;
uint16_t liu;
loff_t size;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen;
kernel_lb_addr eloc;
uint32_t elen;
sector_t offset;
struct buffer_head *bh = NULL;
struct extent_position epos = { NULL, 0, { 0, 0}};
size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
f_pos = (udf_ext0_offset(dir) >> 2);
@@ -167,41 +167,41 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
fibh->sbh = fibh->ebh = NULL;
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
&epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30))
{
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
extoffset -= sizeof(short_ad);
epos.offset -= sizeof(short_ad);
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
extoffset -= sizeof(long_ad);
epos.offset -= sizeof(long_ad);
}
else
offset = 0;
if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
{
udf_release_data(bh);
udf_release_data(epos.bh);
return NULL;
}
}
else
{
udf_release_data(bh);
udf_release_data(epos.bh);
return NULL;
}
while ( (f_pos < size) )
{
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, &elen, &offset);
if (!fi)
{
if (fibh->sbh != fibh->ebh)
udf_release_data(fibh->ebh);
udf_release_data(fibh->sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
return NULL;
}
@@ -247,7 +247,7 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
{
if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
{
udf_release_data(bh);
udf_release_data(epos.bh);
return fi;
}
}
@@ -255,7 +255,7 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
if (fibh->sbh != fibh->ebh)
udf_release_data(fibh->ebh);
udf_release_data(fibh->sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
return NULL;
}
@@ -353,10 +353,10 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
uint8_t lfi;
uint16_t liu;
int block;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen;
kernel_lb_addr eloc;
uint32_t elen;
sector_t offset;
struct buffer_head *bh = NULL;
struct extent_position epos = { NULL, 0, { 0, 0 }};
sb = dir->i_sb;
@@ -385,22 +385,22 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
fibh->sbh = fibh->ebh = NULL;
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
&epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30))
{
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
extoffset -= sizeof(short_ad);
epos.offset -= sizeof(short_ad);
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
extoffset -= sizeof(long_ad);
epos.offset -= sizeof(long_ad);
}
else
offset = 0;
if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
{
udf_release_data(bh);
udf_release_data(epos.bh);
*err = -EIO;
return NULL;
}
@@ -418,14 +418,14 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
while ( (f_pos < size) )
{
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, &elen, &offset);
if (!fi)
{
if (fibh->sbh != fibh->ebh)
udf_release_data(fibh->ebh);
udf_release_data(fibh->sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
*err = -EIO;
return NULL;
}
@@ -455,7 +455,7 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
{
if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen)
{
udf_release_data(bh);
udf_release_data(epos.bh);
cfi->descTag.tagSerialNum = cpu_to_le16(1);
cfi->fileVersionNum = cpu_to_le16(1);
cfi->fileCharacteristics = 0;
@@ -480,7 +480,7 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
if (fibh->sbh != fibh->ebh)
udf_release_data(fibh->ebh);
udf_release_data(fibh->sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
*err = -EEXIST;
return NULL;
}
@@ -492,8 +492,8 @@ add:
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
sb->s_blocksize - fibh->eoffset < nfidlen)
{
udf_release_data(bh);
bh = NULL;
udf_release_data(epos.bh);
epos.bh = NULL;
fibh->soffset -= udf_ext0_offset(dir);
fibh->eoffset -= udf_ext0_offset(dir);
f_pos -= (udf_ext0_offset(dir) >> 2);
@@ -502,15 +502,15 @@ add:
udf_release_data(fibh->sbh);
if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err)))
return NULL;
bloc = UDF_I_LOCATION(dir);
epos.block = UDF_I_LOCATION(dir);
eloc.logicalBlockNum = block;
eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
elen = dir->i_sb->s_blocksize;
extoffset = udf_file_entry_alloc_offset(dir);
epos.offset = udf_file_entry_alloc_offset(dir);
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
extoffset += sizeof(short_ad);
epos.offset += sizeof(short_ad);
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
extoffset += sizeof(long_ad);
epos.offset += sizeof(long_ad);
}
if (sb->s_blocksize - fibh->eoffset >= nfidlen)
@@ -550,14 +550,14 @@ add:
if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err)))
{
udf_release_data(bh);
udf_release_data(epos.bh);
udf_release_data(fibh->sbh);
return NULL;
}
if (!(fibh->soffset))
{
if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) ==
if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
(EXT_RECORDED_ALLOCATED >> 30))
{
block = eloc.logicalBlockNum + ((elen - 1) >>
@@ -587,7 +587,7 @@ add:
cfi->lengthOfImpUse = cpu_to_le16(0);
if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
{
udf_release_data(bh);
udf_release_data(epos.bh);
dir->i_size += nfidlen;
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
UDF_I_LENALLOC(dir) += nfidlen;
@@ -596,7 +596,7 @@ add:
}
else
{
udf_release_data(bh);
udf_release_data(epos.bh);
if (fibh->sbh != fibh->ebh)
udf_release_data(fibh->ebh);
udf_release_data(fibh->sbh);
@@ -781,10 +781,10 @@ static int empty_dir(struct inode *dir)
loff_t f_pos;
loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
int block;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen;
kernel_lb_addr eloc;
uint32_t elen;
sector_t offset;
struct buffer_head *bh = NULL;
struct extent_position epos = { NULL, 0, { 0, 0}};
f_pos = (udf_ext0_offset(dir) >> 2);
@@ -793,42 +793,42 @@ static int empty_dir(struct inode *dir)
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
fibh.sbh = fibh.ebh = NULL;
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
&epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30))
{
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
extoffset -= sizeof(short_ad);
epos.offset -= sizeof(short_ad);
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
extoffset -= sizeof(long_ad);
epos.offset -= sizeof(long_ad);
}
else
offset = 0;
if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
{
udf_release_data(bh);
udf_release_data(epos.bh);
return 0;
}
}
else
{
udf_release_data(bh);
udf_release_data(epos.bh);
return 0;
}
while ( (f_pos < size) )
{
fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, &elen, &offset);
if (!fi)
{
if (fibh.sbh != fibh.ebh)
udf_release_data(fibh.ebh);
udf_release_data(fibh.sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
return 0;
}
@@ -837,14 +837,14 @@ static int empty_dir(struct inode *dir)
if (fibh.sbh != fibh.ebh)
udf_release_data(fibh.ebh);
udf_release_data(fibh.sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
return 0;
}
}
if (fibh.sbh != fibh.ebh)
udf_release_data(fibh.ebh);
udf_release_data(fibh.sbh);
udf_release_data(bh);
udf_release_data(epos.bh);
return 1;
}
@@ -941,7 +941,7 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char *
struct pathComponent *pc;
char *compstart;
struct udf_fileident_bh fibh;
struct buffer_head *bh = NULL;
struct extent_position epos = { NULL, 0, {0, 0}};
int eoffset, elen = 0;
struct fileIdentDesc *fi;
struct fileIdentDesc cfi;
@@ -961,33 +961,33 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char *
if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
{
struct buffer_head *bh = NULL;
kernel_lb_addr bloc, eloc;
uint32_t elen, extoffset;
kernel_lb_addr eloc;
uint32_t elen;
block = udf_new_block(inode->i_sb, inode,
UDF_I_LOCATION(inode).partitionReferenceNum,
UDF_I_LOCATION(inode).logicalBlockNum, &err);
if (!block)
goto out_no_entry;
bloc = UDF_I_LOCATION(inode);
epos.block = UDF_I_LOCATION(inode);
epos.offset = udf_file_entry_alloc_offset(inode);
epos.bh = NULL;
eloc.logicalBlockNum = block;
eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
elen = inode->i_sb->s_blocksize;
UDF_I_LENEXTENTS(inode) = elen;
extoffset = udf_file_entry_alloc_offset(inode);
udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0);
udf_release_data(bh);
udf_add_aext(inode, &epos, eloc, elen, 0);
udf_release_data(epos.bh);
block = udf_get_pblock(inode->i_sb, block,
UDF_I_LOCATION(inode).partitionReferenceNum, 0);
bh = udf_tread(inode->i_sb, block);
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);
ea = bh->b_data + udf_ext0_offset(inode);
epos.bh = udf_tread(inode->i_sb, block);
lock_buffer(epos.bh);
memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
set_buffer_uptodate(epos.bh);
unlock_buffer(epos.bh);
mark_buffer_dirty_inode(epos.bh, inode);
ea = epos.bh->b_data + udf_ext0_offset(inode);
}
else
ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
@@ -1060,7 +1060,7 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char *
}
}
udf_release_data(bh);
udf_release_data(epos.bh);
inode->i_size = elen;
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
UDF_I_LENALLOC(inode) = inode->i_size;