[PATCH v2 07/17] xfs: handle sparse inode chunks in icreate log recovery

[Brian Foster <bfoster@redhat.com>]

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

Sparse inode chunks are allocated in units of m_ialloc_min_blks. 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@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 e47fdf9..d665b44 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3070,12 +3070,19 @@ 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 */
+	if (length != mp->m_ialloc_blks &&
+	    length != mp->m_ialloc_min_blks) {
+		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

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