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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2008-04-28 02:16:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:43 -0700
commit8b91582500ae750db22bd515379616e5e9ad06ab (patch)
treea8af9408f1c8136504efbcae8cde5e8eeb4a1089
parent605afd60ef6dde254fc9b8667c5bccebade251c3 (diff)
ext2: retry block allocation if new blocks are allocated from system zone
If the block allocator gets blocks out of system zone ext2 calls ext2_error. But if the file system is mounted with errors=continue retry block allocation. We need to mark the system zone blocks as in use to make sure retry don't pick them again System zone is the block range mapping block bitmap, inode bitmap and inode table. [akpm@linux-foundation.org: fix typo in comment] Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ext2/balloc.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 25dec8633c94..10bb02c3f25c 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -149,11 +149,12 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
block_group, le32_to_cpu(desc->bg_block_bitmap));
return NULL;
}
- if (!ext2_valid_block_bitmap(sb, desc, block_group, bh)) {
- brelse(bh);
- return NULL;
- }
+ ext2_valid_block_bitmap(sb, desc, block_group, bh);
+ /*
+ * file system mounted not to panic on error, continue with corrupt
+ * bitmap
+ */
return bh;
}
@@ -1380,7 +1381,12 @@ allocated:
"Allocating block in system zone - "
"blocks from "E2FSBLK", length %lu",
ret_block, num);
- goto out;
+ /*
+ * ext2_try_to_allocate marked the blocks we allocated as in
+ * use. So we may want to selectively mark some of the blocks
+ * as free
+ */
+ goto retry_alloc;
}
performed_allocation = 1;