diff options
| author | Jan Kara <jack@suse.cz> | 2007-05-08 00:35:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:21 -0700 |
| commit | 60448b1d6db4e82946ff9a2ac88df341f5fa87a2 (patch) | |
| tree | d0623c3dc26be55aa17319e1e9e8d0fbeea98ac4 /fs/udf/truncate.c | |
| parent | 277866a0e3a4f97e859f7a621f5b4f5359c9526c (diff) | |
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 <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>
Diffstat (limited to 'fs/udf/truncate.c')
| -rw-r--r-- | fs/udf/truncate.c | 21 |
1 files changed, 11 insertions, 10 deletions
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); } } |