udf: cleanup directory offset handling
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>
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 3483274..f792681 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -219,8 +219,8 @@
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 @@
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);