| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1306763236-13751-1-git-send-email-akinobu.mita@gmail.com>
Date: Mon, 30 May 2011 22:47:15 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Akinobu Mita <akinobu.mita@...il.com>, Jan Kara <jack@...e.cz>,
Andrew Morton <akpm@...ux-foundation.org>,
Andreas Dilger <adilger.kernel@...ger.ca>,
linux-ext4@...r.kernel.org
Subject: [PATCH 1/2] ext3: use little-endian bitops directly
s/ext3_set_bit/__test_and_set_bit_le/
s/ext3_clear_bit/__test_and_clear_bit_le/
s/ext3_test_bit/test_bit_le/
s/ext3_find_first_zero_bit/find_first_zero_bit_le/
s/ext3_find_next_zero_bit/find_next_zero_bit_le/
This change reveals that there are some __test_and_{set,clear}_bit_le()
calls which ignore the return value. These can be replaced with
__{set,clear}_bit_le().
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Cc: Jan Kara <jack@...e.cz>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andreas Dilger <adilger.kernel@...ger.ca>
Cc: linux-ext4@...r.kernel.org
---
fs/ext3/balloc.c | 20 ++++++++++----------
fs/ext3/ialloc.c | 8 ++++----
fs/ext3/inode.c | 2 +-
fs/ext3/resize.c | 14 +++++++-------
include/linux/ext3_fs.h | 5 -----
5 files changed, 22 insertions(+), 27 deletions(-)
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index fe52297..8365b3d 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -112,21 +112,21 @@ static int ext3_valid_block_bitmap(struct super_block *sb,
/* check whether block bitmap block number is set */
bitmap_blk = le32_to_cpu(desc->bg_block_bitmap);
offset = bitmap_blk - group_first_block;
- if (!ext3_test_bit(offset, bh->b_data))
+ if (!test_bit_le(offset, bh->b_data))
/* bad block bitmap */
goto err_out;
/* check whether the inode bitmap block number is set */
bitmap_blk = le32_to_cpu(desc->bg_inode_bitmap);
offset = bitmap_blk - group_first_block;
- if (!ext3_test_bit(offset, bh->b_data))
+ if (!test_bit_le(offset, bh->b_data))
/* bad block bitmap */
goto err_out;
/* check whether the inode table block number is set */
bitmap_blk = le32_to_cpu(desc->bg_inode_table);
offset = bitmap_blk - group_first_block;
- next_zero_bit = ext3_find_next_zero_bit(bh->b_data,
+ next_zero_bit = find_next_zero_bit_le(bh->b_data,
offset + EXT3_SB(sb)->s_itb_per_group,
offset);
if (next_zero_bit >= offset + EXT3_SB(sb)->s_itb_per_group)
@@ -722,14 +722,14 @@ static int ext3_test_allocatable(ext3_grpblk_t nr, struct buffer_head *bh)
int ret;
struct journal_head *jh = bh2jh(bh);
- if (ext3_test_bit(nr, bh->b_data))
+ if (test_bit_le(nr, bh->b_data))
return 0;
jbd_lock_bh_state(bh);
if (!jh->b_committed_data)
ret = 1;
else
- ret = !ext3_test_bit(nr, jh->b_committed_data);
+ ret = !test_bit_le(nr, jh->b_committed_data);
jbd_unlock_bh_state(bh);
return ret;
}
@@ -752,14 +752,14 @@ bitmap_search_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
struct journal_head *jh = bh2jh(bh);
while (start < maxblocks) {
- next = ext3_find_next_zero_bit(bh->b_data, maxblocks, start);
+ next = find_next_zero_bit_le(bh->b_data, maxblocks, start);
if (next >= maxblocks)
return -1;
if (ext3_test_allocatable(next, bh))
return next;
jbd_lock_bh_state(bh);
if (jh->b_committed_data)
- start = ext3_find_next_zero_bit(jh->b_committed_data,
+ start = find_next_zero_bit_le(jh->b_committed_data,
maxblocks, next);
jbd_unlock_bh_state(bh);
}
@@ -798,7 +798,7 @@ find_next_usable_block(ext3_grpblk_t start, struct buffer_head *bh,
ext3_grpblk_t end_goal = (start + 63) & ~63;
if (end_goal > maxblocks)
end_goal = maxblocks;
- here = ext3_find_next_zero_bit(bh->b_data, end_goal, start);
+ here = find_next_zero_bit_le(bh->b_data, end_goal, start);
if (here < end_goal && ext3_test_allocatable(here, bh))
return here;
ext3_debug("Bit not found near goal\n");
@@ -845,7 +845,7 @@ claim_block(spinlock_t *lock, ext3_grpblk_t block, struct buffer_head *bh)
if (ext3_set_bit_atomic(lock, block, bh->b_data))
return 0;
jbd_lock_bh_state(bh);
- if (jh->b_committed_data && ext3_test_bit(block,jh->b_committed_data)) {
+ if (jh->b_committed_data && test_bit_le(block, jh->b_committed_data)) {
ext3_clear_bit_atomic(lock, block, bh->b_data);
ret = 0;
} else {
@@ -1697,7 +1697,7 @@ allocated:
int i;
for (i = 0; i < num; i++) {
- if (ext3_test_bit(grp_alloc_blk+i,
+ if (test_bit_le(grp_alloc_blk + i,
bh2jh(bitmap_bh)->b_committed_data)) {
printk("%s: block was unexpectedly set in "
"b_committed_data\n", __func__);
diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c
index bfc2dc4..8796fbc 100644
--- a/fs/ext3/ialloc.c
+++ b/fs/ext3/ialloc.c
@@ -460,7 +460,7 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir,
ino = 0;
repeat_in_this_group:
- ino = ext3_find_next_zero_bit((unsigned long *)
+ ino = find_next_zero_bit_le(
bitmap_bh->b_data, EXT3_INODES_PER_GROUP(sb), ino);
if (ino < EXT3_INODES_PER_GROUP(sb)) {
@@ -654,7 +654,7 @@ struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
* is a valid orphan (no e2fsck run on fs). Orphans also include
* inodes that were being truncated, so we can't check i_nlink==0.
*/
- if (!ext3_test_bit(bit, bitmap_bh->b_data))
+ if (!test_bit_le(bit, bitmap_bh->b_data))
goto bad_orphan;
inode = ext3_iget(sb, ino);
@@ -680,9 +680,9 @@ iget_failed:
bad_orphan:
ext3_warning(sb, __func__,
"bad orphan inode %lu! e2fsck was run?", ino);
- printk(KERN_NOTICE "ext3_test_bit(bit=%d, block=%llu) = %d\n",
+ printk(KERN_NOTICE "test_bit_le(bit=%d, block=%llu) = %d\n",
bit, (unsigned long long)bitmap_bh->b_blocknr,
- ext3_test_bit(bit, bitmap_bh->b_data));
+ test_bit_le(bit, bitmap_bh->b_data));
printk(KERN_NOTICE "inode=%p\n", inode);
if (inode) {
printk(KERN_NOTICE "is_bad_inode(inode)=%d\n",
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 3451d23..57432a6 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -2727,7 +2727,7 @@ static int __ext3_get_inode_loc(struct inode *inode,
for (i = start; i < start + inodes_per_buffer; i++) {
if (i == inode_offset)
continue;
- if (ext3_test_bit(i, bitmap_bh->b_data))
+ if (test_bit_le(i, bitmap_bh->b_data))
break;
}
brelse(bitmap_bh);
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c
index 7916e4c..213a794 100644
--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -148,7 +148,7 @@ static void mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
ext3_debug("mark end bits +%d through +%d used\n", start_bit, end_bit);
for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++)
- ext3_set_bit(i, bitmap);
+ __test_and_set_bit_le(i, bitmap);
if (i < end_bit)
memset(bitmap + (i >> 3), 0xff, (end_bit - i) >> 3);
}
@@ -222,7 +222,7 @@ static int setup_new_group_blocks(struct super_block *sb,
if (ext3_bg_has_super(sb, input->group)) {
ext3_debug("mark backup superblock %#04lx (+0)\n", start);
- ext3_set_bit(0, bh->b_data);
+ __test_and_set_bit_le(0, bh->b_data);
}
/* Copy all of the GDT blocks into the backup in this group */
@@ -254,7 +254,7 @@ static int setup_new_group_blocks(struct super_block *sb,
brelse(gdb);
goto exit_bh;
}
- ext3_set_bit(bit, bh->b_data);
+ __test_and_set_bit_le(bit, bh->b_data);
brelse(gdb);
}
@@ -278,15 +278,15 @@ static int setup_new_group_blocks(struct super_block *sb,
brelse(gdb);
goto exit_bh;
}
- ext3_set_bit(bit, bh->b_data);
+ __test_and_set_bit_le(bit, bh->b_data);
brelse(gdb);
}
ext3_debug("mark block bitmap %#04x (+%ld)\n", input->block_bitmap,
input->block_bitmap - start);
- ext3_set_bit(input->block_bitmap - start, bh->b_data);
+ __test_and_set_bit_le(input->block_bitmap - start, bh->b_data);
ext3_debug("mark inode bitmap %#04x (+%ld)\n", input->inode_bitmap,
input->inode_bitmap - start);
- ext3_set_bit(input->inode_bitmap - start, bh->b_data);
+ __test_and_set_bit_le(input->inode_bitmap - start, bh->b_data);
/* Zero out all of the inode table blocks */
for (i = 0, block = input->inode_table, bit = block - start;
@@ -309,7 +309,7 @@ static int setup_new_group_blocks(struct super_block *sb,
goto exit_bh;
}
brelse(it);
- ext3_set_bit(bit, bh->b_data);
+ __test_and_set_bit_le(bit, bh->b_data);
}
err = extend_or_restart_transaction(handle, 2, bh);
diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index 5e06acf..6caadd0 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -418,13 +418,8 @@ struct ext3_inode {
#define EXT2_MOUNT_DATA_FLAGS EXT3_MOUNT_DATA_FLAGS
#endif
-#define ext3_set_bit __test_and_set_bit_le
#define ext3_set_bit_atomic ext2_set_bit_atomic
-#define ext3_clear_bit __test_and_clear_bit_le
#define ext3_clear_bit_atomic ext2_clear_bit_atomic
-#define ext3_test_bit test_bit_le
-#define ext3_find_first_zero_bit find_first_zero_bit_le
-#define ext3_find_next_zero_bit find_next_zero_bit_le
/*
* Maximal mount counts between two filesystem checks
--
1.7.4.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists