[PATCH v2 07/31] ocfs2: abstract the dinode suballoc bit check

[Joseph Qi <joseph.qi@linux.alibaba.com>]

Fold the i_suballoc_bit against ocfs2_suballoc_bits_per_block() test into
a predicate.  The rationale comment stays at the call site, next to the
error it explains.

No functional change intended.

Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
---
 fs/ocfs2/inode.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 0929deb3e4b4..3be98328925d 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -111,6 +111,12 @@ static bool ocfs2_dinode_has_out_of_range_suballoc_slot(struct super_block *sb,
 		(u32)le16_to_cpu(di->i_suballoc_slot) > OCFS2_SB(sb)->max_slots - 1;
 }
 
+static bool ocfs2_dinode_has_bad_suballoc_bit(struct super_block *sb,
+					      struct ocfs2_dinode *di)
+{
+	return le16_to_cpu(di->i_suballoc_bit) >= ocfs2_suballoc_bits_per_block(sb);
+}
+
 static bool ocfs2_valid_inode_mode(umode_t mode)
 {
 	return fs_umode_to_ftype(mode) != FT_UNKNOWN;
@@ -1601,7 +1607,7 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 	 * BUG_ON((count + start_bit) > ocfs2_bits_per_group(cl)), since any
 	 * group holds at most ocfs2_suballoc_bits_per_block() bits.
 	 */
-	if (le16_to_cpu(di->i_suballoc_bit) >= ocfs2_suballoc_bits_per_block(sb)) {
+	if (ocfs2_dinode_has_bad_suballoc_bit(sb, di)) {
 		rc = ocfs2_error(sb, "Invalid dinode %llu: suballoc bit %u\n",
 				 (unsigned long long)bh->b_blocknr,
 				 le16_to_cpu(di->i_suballoc_bit));
-- 
2.39.3