The patch titled
Subject: fat: eliminate iterations in fat_search_long and __fat_readdir in case of EOD
has been removed from the -mm tree. Its filename was
fat-eliminate-iterations-in-fat_search_long-and-__fat_readdir-in-case-of-eod.patch
This patch was dropped because it was withdrawn
------------------------------------------------------
From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Subject: fat: eliminate iterations in fat_search_long and __fat_readdir in case of EOD
When doing lookups via fat_search_long(), we can stop checking for further
entries if we detect End of Directory, i.e. if (de->name[0] == 0x00).The
current code traverses the cluster chain of a directory until a hit is
found or till the last cluster for that directory, ignoring the EOD mark.
Fix this.
Likewise,when readdir(3) is called, we can stop checking for further
entries in __fat_readdir() when we hit EOD.
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Ravishankar N <ravi.n1@xxxxxxxxxxx>
Cc: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/dir.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN fs/fat/dir.c~fat-eliminate-iterations-in-fat_search_long-and-__fat_readdir-in-case-of-eod fs/fat/dir.c
--- a/fs/fat/dir.c~fat-eliminate-iterations-in-fat_search_long-and-__fat_readdir-in-case-of-eod
+++ a/fs/fat/dir.c
@@ -484,10 +484,10 @@ parse_record:
nr_slots = 0;
if (de->name[0] == DELETED_FLAG)
continue;
+ if (!de->name[0])
+ goto end_of_dir;
if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
continue;
- if (de->attr != ATTR_EXT && IS_FREE(de->name))
- continue;
if (de->attr == ATTR_EXT) {
int status = fat_parse_long(inode, &cpos, &bh, &de,
&unicode, &nr_slots);
@@ -608,8 +608,8 @@ parse_record:
goto record_end;
if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
goto record_end;
- if (de->attr != ATTR_EXT && IS_FREE(de->name))
- goto record_end;
+ if (!de->name[0])
+ goto end_of_dir;
} else {
if ((de->attr & ATTR_VOLUME) || IS_FREE(de->name))
goto record_end;
_
Patches currently in -mm which might be from namjae.jeon@xxxxxxxxxxx are
linux-next.patch
lib-parserc-fix-up-comments-for-valid-return-values-from-match_number.patch
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