From 60448b1d6db4e82946ff9a2ac88df341f5fa87a2 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 8 May 2007 00:35:13 -0700 Subject: udf: use sector_t and loff_t for file offsets 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 Acked-by: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/udf/dir.c | 4 ++-- fs/udf/directory.c | 2 +- fs/udf/inode.c | 28 +++++++++++++++------------- fs/udf/namei.c | 12 ++++++------ fs/udf/truncate.c | 21 +++++++++++---------- fs/udf/udfdecl.h | 6 +++--- 6 files changed, 38 insertions(+), 35 deletions(-) (limited to 'fs/udf') diff --git a/fs/udf/dir.c b/fs/udf/dir.c index 2391c9150c4..3c50b82a230 100644 --- a/fs/udf/dir.c +++ b/fs/udf/dir.c @@ -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; @@ -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) { diff --git a/fs/udf/directory.c b/fs/udf/directory.c index fe751a2a0e4..024ccac8b7f 100644 --- a/fs/udf/directory.c +++ b/fs/udf/directory.c @@ -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; diff --git a/fs/udf/inode.c b/fs/udf/inode.c index ae21a0e59e9..6b094250d80 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -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; diff --git a/fs/udf/namei.c b/fs/udf/namei.c index b25437527de..b9859ac169c 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -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; @@ -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) { @@ -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; @@ -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) { @@ -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); @@ -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) { diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c index 0abd66ce36e..ebd0f37f8b1 100644 --- a/fs/udf/truncate.c +++ b/fs/udf/truncate.c @@ -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; @@ -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; @@ -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 @@ -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 { @@ -257,7 +258,7 @@ 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)) @@ -265,7 +266,7 @@ void udf_truncate_extents(struct inode * inode) 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); @@ -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); } } diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index ee1dece1f6f..d3deb32b53e 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -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 *); @@ -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); -- cgit v1.2.3