[PATCH 07/18] xfs: handle sparse inode chunks in icreate log recovery

[Brian Foster]

Recovery of icreate transactions assumes hardcoded values for the inode
count and chunk length.

Sparse inode chunks are allocated in units of the cluster size. Update
the icreate validity checks to allow for appropriately sized inode
chunks and verify the inode count matches what is expected based on the
extent length rather than assuming a hardcoded count.

Signed-off-by: Brian Foster <bfoster at redhat.com>
---
 fs/xfs/xfs_log_recover.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index cbe782a..5994fb5 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3213,12 +3213,19 @@ xlog_recover_do_icreate_pass2(
 		return -EINVAL;
 	}
 
-	/* existing allocation is fixed value */
-	ASSERT(count == mp->m_ialloc_inos);
-	ASSERT(length == mp->m_ialloc_blks);
-	if (count != mp->m_ialloc_inos ||
-	     length != mp->m_ialloc_blks) {
-		xfs_warn(log->l_mp, "xlog_recover_do_icreate_trans: bad count 2");
+	/* inode chunk is either full or sparse (cluster sized) */
+	if (length != mp->m_ialloc_blks &&
+	    length != xfs_icluster_size_fsb(mp)) {
+		xfs_warn(log->l_mp,
+			 "%s: unsupported chunk length", __FUNCTION__);
+		return -EINVAL;
+	}
+
+	/* verify inode count is consistent with extent length */
+	if ((count >> mp->m_sb.sb_inopblog) != length) {
+		xfs_warn(log->l_mp,
+			 "%s: inconsistent inode count and chunk length",
+			 __FUNCTION__);
 		return -EINVAL;
 	}
 
-- 
1.8.3.1