xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

udf: use sector_t and loff_t for file offsets

Browse Source 
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>
This commit is contained in:
Jan Kara
2007-05-08 00:35:13 -07:00
committed by Linus Torvalds
parent 277866a0e3
commit 60448b1d6d
6 changed files with 38 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
fs/udf/inode.c
View File

@@ -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 *);
@@ -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;
@@ -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.
@@ -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)
@@ -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;