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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-04-28 23:38:46 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-05-09 13:36:56 +0900
commit85c2a74fabadfc561b75fbd7decc6bcbfe873d57 (patch)
treead0adcd8377412184a9a5bac9fea3191cbea29ca /fs/nilfs2
parent091bf7624d1c90cec9e578a18529f615213ff847 (diff)
downloadkernel-crypto-85c2a74fabadfc561b75fbd7decc6bcbfe873d57.tar.gz
kernel-crypto-85c2a74fabadfc561b75fbd7decc6bcbfe873d57.tar.xz
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nilfs2: fix possible recovery failure due to block creation without writer
Some function calls in nilfs_prepare_segment_for_recovery() may fail because they can create blocks on meta data files without configuring a writable FS-instance. Concretely, nilfs_mdt_create_block() routine of meta data files will fail in that case. This fixes the problem by temporarily attaching a writable FS-instace during the function is called. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/recovery.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index 4fc081e47d7..57afa9d2406 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -407,6 +407,7 @@ void nilfs_dispose_segment_list(struct list_head *head)
}
static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
+ struct nilfs_sb_info *sbi,
struct nilfs_recovery_info *ri)
{
struct list_head *head = &ri->ri_used_segments;
@@ -421,6 +422,7 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
segnum[2] = ri->ri_segnum;
segnum[3] = ri->ri_nextnum;
+ nilfs_attach_writer(nilfs, sbi);
/*
* Releasing the next segment of the latest super root.
* The next segment is invalidated by this recovery.
@@ -459,10 +461,10 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
nilfs->ns_pseg_offset = 0;
nilfs->ns_seg_seq = ri->ri_seq + 2;
nilfs->ns_nextnum = nilfs->ns_segnum = segnum[0];
- return 0;
failed:
/* No need to recover sufile because it will be destroyed on error */
+ nilfs_detach_writer(nilfs, sbi);
return err;
}
@@ -728,7 +730,7 @@ int nilfs_recover_logical_segments(struct the_nilfs *nilfs,
goto failed;
if (ri->ri_need_recovery == NILFS_RECOVERY_ROLLFORWARD_DONE) {
- err = nilfs_prepare_segment_for_recovery(nilfs, ri);
+ err = nilfs_prepare_segment_for_recovery(nilfs, sbi, ri);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: Error preparing segments for "
"recovery.\n");