| 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: <1429082147-4151-3-git-send-email-b.michalska@samsung.com>
Date: Wed, 15 Apr 2015 09:15:45 +0200
From: Beata Michalska <b.michalska@...sung.com>
To: linux-kernel@...r.kernel.org
Cc: tytso@....edu, adilger.kernel@...ger.ca, hughd@...gle.com,
lczerner@...hat.com, hch@...radead.org, linux-ext4@...r.kernel.org,
linux-mm@...ck.org, kyungmin.park@...sung.com, kmpark@...radead.org
Subject: [RFC 2/4] ext4: Add helper function to mark group as corrupted
Add ext4_mark_group_corrupted helper function to
simplify the code and to keep the logic in one place.
Signed-off-by: Beata Michalska <b.michalska@...sung.com>
---
fs/ext4/balloc.c | 15 +++------------
fs/ext4/ext4.h | 9 +++++++++
fs/ext4/ialloc.c | 5 +----
fs/ext4/mballoc.c | 11 ++---------
4 files changed, 15 insertions(+), 25 deletions(-)
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 83a6f49..e95b27a 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -193,10 +193,7 @@ static int ext4_init_block_bitmap(struct super_block *sb,
* essentially implementing a per-group read-only flag. */
if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
grp = ext4_get_group_info(sb, block_group);
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+ ext4_mark_group_corrupted(sbi, grp);
if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
int count;
count = ext4_free_inodes_count(sb, gdp);
@@ -379,20 +376,14 @@ static void ext4_validate_block_bitmap(struct super_block *sb,
ext4_unlock_group(sb, block_group);
ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
block_group, blk);
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+ ext4_mark_group_corrupted(sbi, grp);
return;
}
if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
desc, bh))) {
ext4_unlock_group(sb, block_group);
ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+ ext4_mark_group_corrupted(sbi, grp);
return;
}
set_buffer_verified(bh);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f63c3d5..163afe2 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2535,6 +2535,15 @@ static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb,
return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group);
}
+static inline
+void ext4_mark_group_corrupted(struct ext4_sb_info *sbi,
+ struct ext4_group_info *grp)
+{
+ if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
+ percpu_counter_sub(&sbi->s_freeclusters_counter, grp->bb_free);
+ set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+}
+
/*
* Returns true if the filesystem is busy enough that attempts to
* access the block group locks has run into contention.
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index ac644c3..ebe0499 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -79,10 +79,7 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
ext4_error(sb, "Checksum bad for group %u", block_group);
grp = ext4_get_group_info(sb, block_group);
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+ ext4_mark_group_corrupted(sbi, grp);
if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
int count;
count = ext4_free_inodes_count(sb, gdp);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8d1e602..24a4b6d 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -760,10 +760,7 @@ void ext4_mb_generate_buddy(struct super_block *sb,
* corrupt and update bb_free using bitmap value
*/
grp->bb_free = free;
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(grp))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- grp->bb_free);
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, &grp->bb_state);
+ ext4_mark_group_corrupted(sbi, grp);
}
mb_set_largest_free_order(sb, grp);
@@ -1448,12 +1445,8 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
"freeing already freed block "
"(bit %u); block bitmap corrupt.",
block);
- if (!EXT4_MB_GRP_BBITMAP_CORRUPT(e4b->bd_info))
- percpu_counter_sub(&sbi->s_freeclusters_counter,
- e4b->bd_info->bb_free);
/* Mark the block group as corrupt. */
- set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT,
- &e4b->bd_info->bb_state);
+ ext4_mark_group_corrupted(sbi, e4b->bd_info);
mb_regenerate_buddy(e4b);
goto done;
}
--
1.7.9.5
--
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