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udf: cleanup directory offset handling

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Position in directory returned by readdir is offset of directory entry divided
by four (don't ask me why).  Make this conversion only when reading f_pos from
userspace / writing it there and internally work in bytes.  It makes things
more easily readable and also fixes a bug (we forgot to divide length of the
entry by 4 when advancing f_pos in udf_add_entry()).

Signed-off-by: Jan Kara <jack@suse.cz>
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
2008-02-08 04:20:50 -08:00
committed by Linus Torvalds
parent 32a8f24dd7
commit af793295bf
3 changed files with 24 additions and 30 deletions
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8
fs/udf/inode.c
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@@ -219,8 +219,8 @@ struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
struct extent_position epos;
struct udf_fileident_bh sfibh, dfibh;
loff_t f_pos = udf_ext0_offset(inode) >> 2;
int size = (udf_ext0_offset(inode) + inode->i_size) >> 2;
loff_t f_pos = udf_ext0_offset(inode);
int size = udf_ext0_offset(inode) + inode->i_size;
struct fileIdentDesc cfi, *sfi, *dfi;
struct udf_inode_info *iinfo = UDF_I(inode);
@@ -256,11 +256,11 @@ struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
mark_buffer_dirty_inode(dbh, inode);
sfibh.soffset = sfibh.eoffset =
(f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2;
f_pos & (inode->i_sb->s_blocksize - 1);
sfibh.sbh = sfibh.ebh = NULL;
dfibh.soffset = dfibh.eoffset = 0;
dfibh.sbh = dfibh.ebh = dbh;
while ((f_pos < size)) {
while (f_pos < size) {
iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
NULL, NULL, NULL);