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udf: use sector_t and loff_t for file offsets
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Use sector_t and loff_t for file offsets in UDF filesystem.  Otherwise an
overflow may occur for long files.  Also make inode_bmap() return offset in
the extent in number of blocks instead of number of bytes - for most
callers this is more convenient.

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>
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Jan Kara authored and Linus Torvalds committed May 8, 2007
1 parent 277866a commit 60448b1
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Showing 6 changed files with 38 additions and 35 deletions.
4 changes: 2 additions & 2 deletions fs/udf/dir.c
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Original file line number Diff line number Diff line change
Expand Up @@ -113,7 +113,8 @@ do_udf_readdir(struct inode * dir, struct file *filp, filldir_t filldir, void *d
loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
struct buffer_head * bh = NULL, * tmp, * bha[16];
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen, offset;
uint32_t extoffset, elen;
sector_t offset;
int i, num;
unsigned int dt_type;

Expand All @@ -129,7 +130,6 @@ do_udf_readdir(struct inode * dir, struct file *filp, filldir_t filldir, void *d
else if (inode_bmap(dir, nf_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
{
offset >>= dir->i_sb->s_blocksize_bits;
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
Expand Down
2 changes: 1 addition & 1 deletion fs/udf/directory.c
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,7 @@ udf_fileident_read(struct inode *dir, loff_t *nf_pos,
struct fileIdentDesc *cfi,
kernel_lb_addr *bloc, uint32_t *extoffset,
kernel_lb_addr *eloc, uint32_t *elen,
uint32_t *offset, struct buffer_head **bh)
sector_t *offset, struct buffer_head **bh)
{
struct fileIdentDesc *fi;
int i, num, block;
Expand Down
28 changes: 15 additions & 13 deletions fs/udf/inode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ MODULE_LICENSE("GPL");
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 *);
static struct buffer_head *inode_getblk(struct inode *, long, int *,
static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
long *, int *);
static int8_t udf_insert_aext(struct inode *, kernel_lb_addr, int,
kernel_lb_addr, uint32_t, struct buffer_head *);
Expand Down Expand Up @@ -354,7 +354,7 @@ udf_getblk(struct inode *inode, long block, int create, int *err)
return NULL;
}

static struct buffer_head * inode_getblk(struct inode * inode, long block,
static struct buffer_head * inode_getblk(struct inode * inode, sector_t block,
int *err, long *phys, int *new)
{
struct buffer_head *pbh = NULL, *cbh = NULL, *nbh = NULL, *result = NULL;
Expand All @@ -364,14 +364,15 @@ static struct buffer_head * inode_getblk(struct inode * inode, long block,
uint32_t elen = 0;
kernel_lb_addr eloc, pbloc, cbloc, nbloc;
int c = 1;
uint64_t lbcount = 0, b_off = 0;
uint32_t newblocknum, newblock, offset = 0;
loff_t lbcount = 0, b_off = 0;
uint32_t newblocknum, newblock;
sector_t offset = 0;
int8_t etype;
int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum;
char lastblock = 0;

pextoffset = cextoffset = nextoffset = udf_file_entry_alloc_offset(inode);
b_off = (uint64_t)block << inode->i_sb->s_blocksize_bits;
b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
pbloc = cbloc = nbloc = UDF_I_LOCATION(inode);

/* find the extent which contains the block we are looking for.
Expand Down Expand Up @@ -1948,10 +1949,10 @@ int8_t udf_delete_aext(struct inode *inode, kernel_lb_addr nbloc, int nextoffset
return (elen >> 30);
}

int8_t inode_bmap(struct inode *inode, int block, kernel_lb_addr *bloc, uint32_t *extoffset,
kernel_lb_addr *eloc, uint32_t *elen, uint32_t *offset, struct buffer_head **bh)
int8_t inode_bmap(struct inode *inode, sector_t block, kernel_lb_addr *bloc, uint32_t *extoffset,
kernel_lb_addr *eloc, uint32_t *elen, sector_t *offset, struct buffer_head **bh)
{
uint64_t lbcount = 0, bcount = (uint64_t)block << inode->i_sb->s_blocksize_bits;
loff_t lbcount = 0, bcount = (loff_t)block << inode->i_sb->s_blocksize_bits;
int8_t etype;

if (block < 0)
Expand All @@ -1968,29 +1969,30 @@ int8_t inode_bmap(struct inode *inode, int block, kernel_lb_addr *bloc, uint32_t
{
if ((etype = udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, 1)) == -1)
{
*offset = bcount - lbcount;
*offset = (bcount - lbcount) >> inode->i_sb->s_blocksize_bits;
UDF_I_LENEXTENTS(inode) = lbcount;
return -1;
}
lbcount += *elen;
} while (lbcount <= bcount);

*offset = bcount + *elen - lbcount;
*offset = (bcount + *elen - lbcount) >> inode->i_sb->s_blocksize_bits;

return etype;
}

long udf_block_map(struct inode *inode, long block)
long udf_block_map(struct inode *inode, sector_t block)
{
kernel_lb_addr eloc, bloc;
uint32_t offset, extoffset, elen;
uint32_t extoffset, elen;
sector_t offset;
struct buffer_head *bh = NULL;
int ret;

lock_kernel();

if (inode_bmap(inode, block, &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
ret = udf_get_lb_pblock(inode->i_sb, eloc, offset >> inode->i_sb->s_blocksize_bits);
ret = udf_get_lb_pblock(inode->i_sb, eloc, offset);
else
ret = 0;

Expand Down
12 changes: 6 additions & 6 deletions fs/udf/namei.c
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Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,8 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
uint16_t liu;
loff_t size;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen, offset;
uint32_t extoffset, elen;
sector_t offset;
struct buffer_head *bh = NULL;

size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
Expand All @@ -168,7 +169,6 @@ udf_find_entry(struct inode *dir, struct dentry *dentry,
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
{
offset >>= dir->i_sb->s_blocksize_bits;
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
Expand Down Expand Up @@ -354,7 +354,8 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
uint16_t liu;
int block;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen, offset;
uint32_t extoffset, elen;
sector_t offset;
struct buffer_head *bh = NULL;

sb = dir->i_sb;
Expand Down Expand Up @@ -386,7 +387,6 @@ udf_add_entry(struct inode *dir, struct dentry *dentry,
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
{
offset >>= dir->i_sb->s_blocksize_bits;
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
Expand Down Expand Up @@ -782,7 +782,8 @@ static int empty_dir(struct inode *dir)
loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
int block;
kernel_lb_addr bloc, eloc;
uint32_t extoffset, elen, offset;
uint32_t extoffset, elen;
sector_t offset;
struct buffer_head *bh = NULL;

f_pos = (udf_ext0_offset(dir) >> 2);
Expand All @@ -794,7 +795,6 @@ static int empty_dir(struct inode *dir)
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
{
offset >>= dir->i_sb->s_blocksize_bits;
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
{
Expand Down
21 changes: 11 additions & 10 deletions fs/udf/truncate.c
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Original file line number Diff line number Diff line change
Expand Up @@ -125,9 +125,10 @@ void udf_discard_prealloc(struct inode * inode)
void udf_truncate_extents(struct inode * inode)
{
kernel_lb_addr bloc, eloc, neloc = { 0, 0 };
uint32_t extoffset, elen, offset, nelen = 0, lelen = 0, lenalloc;
uint32_t extoffset, elen, nelen = 0, lelen = 0, lenalloc;
int8_t etype;
int first_block = inode->i_size >> inode->i_sb->s_blocksize_bits;
sector_t first_block = inode->i_size >> inode->i_sb->s_blocksize_bits, offset;
loff_t byte_offset;
struct buffer_head *bh = NULL;
int adsize;

Expand All @@ -139,14 +140,14 @@ void udf_truncate_extents(struct inode * inode)
adsize = 0;

etype = inode_bmap(inode, first_block, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
offset += (inode->i_size & (inode->i_sb->s_blocksize - 1));
byte_offset = (offset << inode->i_sb->s_blocksize_bits) + (inode->i_size & (inode->i_sb->s_blocksize-1));
if (etype != -1)
{
extoffset -= adsize;
extent_trunc(inode, bloc, extoffset, eloc, etype, elen, bh, offset);
extent_trunc(inode, bloc, extoffset, eloc, etype, elen, bh, byte_offset);
extoffset += adsize;

if (offset)
if (byte_offset)
lenalloc = extoffset;
else
lenalloc = extoffset - adsize;
Expand Down Expand Up @@ -237,7 +238,7 @@ void udf_truncate_extents(struct inode * inode)
}
else if (inode->i_size)
{
if (offset)
if (byte_offset)
{
/*
* OK, there is not extent covering inode->i_size and
Expand All @@ -248,7 +249,7 @@ void udf_truncate_extents(struct inode * inode)
(bh && extoffset == sizeof(struct allocExtDesc))) {
/* File has no extents at all! */
memset(&eloc, 0x00, sizeof(kernel_lb_addr));
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | offset;
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | byte_offset;
udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 1);
}
else {
Expand All @@ -257,15 +258,15 @@ void udf_truncate_extents(struct inode * inode)
if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
{
extoffset -= adsize;
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | (elen + offset);
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | (elen + byte_offset);
udf_write_aext(inode, bloc, &extoffset, eloc, elen, bh, 0);
}
else if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30))
{
kernel_lb_addr neloc = { 0, 0 };
extoffset -= adsize;
nelen = EXT_NOT_RECORDED_NOT_ALLOCATED |
((elen + offset + inode->i_sb->s_blocksize - 1) &
((elen + byte_offset + inode->i_sb->s_blocksize - 1) &
~(inode->i_sb->s_blocksize - 1));
udf_write_aext(inode, bloc, &extoffset, neloc, nelen, bh, 1);
udf_add_aext(inode, &bloc, &extoffset, eloc, (etype << 30) | elen, &bh, 1);
Expand All @@ -281,7 +282,7 @@ void udf_truncate_extents(struct inode * inode)
udf_write_aext(inode, bloc, &extoffset, eloc, elen, bh, 1);
}
memset(&eloc, 0x00, sizeof(kernel_lb_addr));
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | offset;
elen = EXT_NOT_RECORDED_NOT_ALLOCATED | byte_offset;
udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 1);
}
}
Expand Down
6 changes: 3 additions & 3 deletions fs/udf/udfdecl.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,8 @@ extern void udf_read_inode(struct inode *);
extern void udf_delete_inode(struct inode *);
extern void udf_clear_inode(struct inode *);
extern int udf_write_inode(struct inode *, int);
extern long udf_block_map(struct inode *, long);
extern int8_t inode_bmap(struct inode *, int, kernel_lb_addr *, uint32_t *, kernel_lb_addr *, uint32_t *, uint32_t *, struct buffer_head **);
extern long udf_block_map(struct inode *, sector_t);
extern int8_t inode_bmap(struct inode *, sector_t, kernel_lb_addr *, uint32_t *, kernel_lb_addr *, uint32_t *, sector_t *, struct buffer_head **);
extern int8_t udf_add_aext(struct inode *, kernel_lb_addr *, int *, kernel_lb_addr, uint32_t, struct buffer_head **, int);
extern int8_t udf_write_aext(struct inode *, kernel_lb_addr, int *, kernel_lb_addr, uint32_t, struct buffer_head *, int);
extern int8_t udf_delete_aext(struct inode *, kernel_lb_addr, int, kernel_lb_addr, uint32_t, struct buffer_head *);
Expand Down Expand Up @@ -151,7 +151,7 @@ extern int udf_new_block(struct super_block *, struct inode *, uint16_t, uint32_
extern int udf_fsync_file(struct file *, struct dentry *, int);

/* directory.c */
extern struct fileIdentDesc * udf_fileident_read(struct inode *, loff_t *, struct udf_fileident_bh *, struct fileIdentDesc *, kernel_lb_addr *, uint32_t *, kernel_lb_addr *, uint32_t *, uint32_t *, struct buffer_head **);
extern struct fileIdentDesc * udf_fileident_read(struct inode *, loff_t *, struct udf_fileident_bh *, struct fileIdentDesc *, kernel_lb_addr *, uint32_t *, kernel_lb_addr *, uint32_t *, sector_t *, struct buffer_head **);
extern struct fileIdentDesc * udf_get_fileident(void * buffer, int bufsize, int * offset);
extern long_ad * udf_get_filelongad(uint8_t *, int, int *, int);
extern short_ad * udf_get_fileshortad(uint8_t *, int, int *, int);
Expand Down

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