[PATCH 3/3] XFS: Print error when unable to allocate inodes or out of free inodes.

[raghu.prabhu13 at gmail.com]

From: Raghavendra D Prabhu <rprabhu at wnohang.net>

When xfs_dialloc is unable to allocate required number of inodes or there are no
AGs with free inodes, printk the error in ratelimited manner.

Signed-off-by: Raghavendra D Prabhu <rprabhu at wnohang.net>
---
 fs/xfs/xfs_ialloc.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index e75a39d..034131b 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -990,8 +990,11 @@ xfs_dialloc(
 				goto out_error;
 
 			xfs_perag_put(pag);
-			*inop = NULLFSINO;
-			return 0;
+
+			xfs_err_ratelimited(mp,
+				"Unable to allocate inodes in AG %d: Required %d, Current %llu, Maximum %llu",
+				agno, XFS_IALLOC_INODES(mp), mp->m_sb.sb_icount, mp->m_maxicount);
+			goto out_spc;
 		}
 
 		if (ialloced) {
@@ -1016,11 +1019,19 @@ nextag:
 		if (++agno == mp->m_sb.sb_agcount)
 			agno = 0;
 		if (agno == start_agno) {
-			*inop = NULLFSINO;
-			return noroom ? ENOSPC : 0;
+			if (noroom) {
+				xfs_err_ratelimited(mp,
+					"Out of AGs with free inodes: Required %d, Current %llu, Maximum %llu",
+					 XFS_IALLOC_INODES(mp), mp->m_sb.sb_icount, mp->m_maxicount);
+				goto out_spc;
+			}
+			return 0;
 		}
 	}
 
+out_spc:
+	*inop = NULLFSINO;
+	return ENOSPC;
 out_alloc:
 	*IO_agbp = NULL;
 	return xfs_dialloc_ag(tp, agbp, parent, inop);
-- 
1.7.12