[PATCH 02/30] ocfs2: abstract the dinode i_blkno mismatch check

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

The same i_blkno against b_blocknr comparison is open-coded in
ocfs2_validate_inode_block(), ocfs2_filecheck_validate_inode_block() and
ocfs2_filecheck_repair_inode_block().  Fold it into a shared predicate.

Each call site keeps its own log message and return code: the normal
validator escalates through ocfs2_error(), filecheck reports
OCFS2_FILECHECK_ERR_BLOCKNO, and repair rewrites the field.

No functional change intended.

Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
---
 fs/ocfs2/inode.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index bffd64e0a1c0..b13c7a9b54f3 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -72,6 +72,11 @@ static bool ocfs2_dinode_has_zero_nlink_or_mode(struct ocfs2_dinode *di)
 	return !ocfs2_read_links_count(di) || !di->i_mode;
 }
 
+static bool ocfs2_dinode_has_wrong_blkno(struct ocfs2_dinode *di, u64 blkno)
+{
+	return le64_to_cpu(di->i_blkno) != blkno;
+}
+
 static bool ocfs2_valid_inode_mode(umode_t mode)
 {
 	return fs_umode_to_ftype(mode) != FT_UNKNOWN;
@@ -1507,7 +1512,7 @@ int ocfs2_validate_inode_block(struct super_block *sb,
 		goto bail;
 	}
 
-	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+	if (ocfs2_dinode_has_wrong_blkno(di, bh->b_blocknr)) {
 		rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
 				 (unsigned long long)bh->b_blocknr,
 				 (unsigned long long)le64_to_cpu(di->i_blkno));
@@ -1829,7 +1834,7 @@ static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
 	} else if (rc)
 		goto bail;
 
-	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+	if (ocfs2_dinode_has_wrong_blkno(di, bh->b_blocknr)) {
 		mlog(ML_ERROR,
 		     "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
 		     (unsigned long long)bh->b_blocknr,
@@ -1934,7 +1939,7 @@ static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
 		return -OCFS2_FILECHECK_ERR_VALIDFLAG;
 	}
 
-	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
+	if (ocfs2_dinode_has_wrong_blkno(di, bh->b_blocknr)) {
 		di->i_blkno = cpu_to_le64(bh->b_blocknr);
 		changed = 1;
 		mlog(ML_ERROR,
-- 
2.39.3