ocfs2: ac_bits_wanted should be local_alloc_bits when returns -ENOSPC

Commit Message

Younger Liu July 25, 2013, 11 a.m. UTC

There is an issue in reserving and claiming space for localalloc,
When localalloc space is not enough, it would claim space from 
global_bitmap. And if there is not enough free space in global_bitmap,
the size of claiming space would set to half of orignal size and retry.

The issue is as follows:
osb->local_alloc_bits is set to half of orignal size in 
ocfs2_recalc_la_window(), but ac->ac_bits_wanted is set to 
osb->local_alloc_default_bits which is not changed.
localalloc always reserves and claims local_alloc_default_bits 
space and returns ENOSPC.

So, ac->ac_bits_wanted should be osb->local_alloc_bits 
which would be changed.

Signed-off-by: Younger Liu <[e-mail]>
---
 fs/ocfs2/localalloc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index aebeacd..cd5496b 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -1082,7 +1082,7 @@  static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb,
 	}
 
 retry_enospc:
-	(*ac)->ac_bits_wanted = osb->local_alloc_default_bits;
+	(*ac)->ac_bits_wanted = osb->local_alloc_bits;
 	status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
 	if (status == -ENOSPC) {
 		if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) ==
@@ -1154,7 +1154,7 @@  retry_enospc:
 		    OCFS2_LA_DISABLED)
 			goto bail;
 
-		ac->ac_bits_wanted = osb->local_alloc_default_bits;
+		ac->ac_bits_wanted = osb->local_alloc_bits;
 		status = ocfs2_claim_clusters(handle, ac,
 					      osb->local_alloc_bits,
 					      &cluster_off,