[PATCH 13/17] xfs_repair: remove verify_aginum

From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: sandeen@sandeen.net, darrick.wong@oracle.com
Cc: Christoph Hellwig <hch@lst.de>, linux-xfs@vger.kernel.org
Subject: [PATCH 13/17] xfs_repair: remove verify_aginum
Date: Mon, 01 Jun 2020 21:26:25 -0700	[thread overview]
Message-ID: <159107198538.313760.17599234824681924862.stgit@magnolia> (raw)
In-Reply-To: <159107190111.313760.8056083399475334567.stgit@magnolia>

From: Darrick J. Wong <darrick.wong@oracle.com>

Replace this homegrown inode pointer verification function with the
libxfs checking helper.  This one is a little tricky because this
function (unlike all of its verify_* siblings) returned 1 for bad and 0
for good, so we must invert the checking logic.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 libxfs/libxfs_api_defs.h |    1 +
 repair/dino_chunks.c     |    6 +++--
 repair/dinode.c          |   51 ----------------------------------------------
 repair/dinode.h          |    5 -----
 repair/scan.c            |    4 ++--
 5 files changed, 6 insertions(+), 61 deletions(-)

diff --git a/libxfs/libxfs_api_defs.h b/libxfs/libxfs_api_defs.h
index 69f79a08..be06c763 100644
--- a/libxfs/libxfs_api_defs.h
+++ b/libxfs/libxfs_api_defs.h
@@ -182,6 +182,7 @@
 #define xfs_trans_roll			libxfs_trans_roll
 
 #define xfs_verify_agbno		libxfs_verify_agbno
+#define xfs_verify_agino		libxfs_verify_agino
 #define xfs_verify_cksum		libxfs_verify_cksum
 #define xfs_verify_dir_ino		libxfs_verify_dir_ino
 #define xfs_verify_fsbno		libxfs_verify_fsbno
diff --git a/repair/dino_chunks.c b/repair/dino_chunks.c
index 6685a4d2..399d4998 100644
--- a/repair/dino_chunks.c
+++ b/repair/dino_chunks.c
@@ -1124,7 +1124,7 @@ check_uncertain_aginodes(xfs_mount_t *mp, xfs_agnumber_t agno)
 
 			agino = i + irec->ino_startnum;
 
-			if (verify_aginum(mp, agno, agino))
+			if (!libxfs_verify_agino(mp, agno, agino))
 				continue;
 
 			if (nrec != NULL && nrec->ino_startnum <= agino &&
@@ -1133,7 +1133,7 @@ check_uncertain_aginodes(xfs_mount_t *mp, xfs_agnumber_t agno)
 				continue;
 
 			if ((nrec = find_inode_rec(mp, agno, agino)) == NULL)
-				if (!verify_aginum(mp, agno, agino))
+				if (libxfs_verify_agino(mp, agno, agino))
 					if (verify_aginode_chunk(mp, agno,
 							agino, &start))
 						got_some = 1;
@@ -1215,7 +1215,7 @@ process_uncertain_aginodes(xfs_mount_t *mp, xfs_agnumber_t agno)
 			 * good tree), bad inode numbers, and inode numbers
 			 * pointing to bogus inodes
 			 */
-			if (verify_aginum(mp, agno, agino))
+			if (!libxfs_verify_agino(mp, agno, agino))
 				continue;
 
 			if (nrec != NULL && nrec->ino_startnum <= agino &&
diff --git a/repair/dinode.c b/repair/dinode.c
index 67adddd7..526ecde3 100644
--- a/repair/dinode.c
+++ b/repair/dinode.c
@@ -152,57 +152,6 @@ clear_dinode(xfs_mount_t *mp, xfs_dinode_t *dino, xfs_ino_t ino_num)
  * misc. inode-related utility routines
  */
 
-/*
- * verify_ag_bno is heavily used. In the common case, it
- * performs just two number of compares
- * Returns 1 for bad ag/bno pair or 0 if it's valid.
- */
-static __inline int
-verify_ag_bno(xfs_sb_t *sbp,
-		xfs_agnumber_t agno,
-		xfs_agblock_t agbno)
-{
-	if (agno < (sbp->sb_agcount - 1))
-		return (agbno >= sbp->sb_agblocks);
-	if (agno == (sbp->sb_agcount - 1))
-		return (agbno >= (sbp->sb_dblocks -
-				((xfs_rfsblock_t)(sbp->sb_agcount - 1) *
-				 sbp->sb_agblocks)));
-	return 1;
-}
-
-/*
- * have a separate routine to ensure that we don't accidentally
- * lose illegally set bits in the agino by turning it into an FSINO
- * to feed to the above routine
- */
-int
-verify_aginum(xfs_mount_t	*mp,
-		xfs_agnumber_t	agno,
-		xfs_agino_t	agino)
-{
-	xfs_agblock_t	agbno;
-	xfs_sb_t	*sbp = &mp->m_sb;;
-
-	/* range check ag #, ag block.  range-checking offset is pointless */
-
-	if (agino == 0 || agino == NULLAGINO)
-		return(1);
-
-	/*
-	 * agino's can't be too close to NULLAGINO because the min blocksize
-	 * is 9 bits and at most 1 bit of that gets used for the inode offset
-	 * so if the agino gets shifted by the # of offset bits and compared
-	 * to the legal agbno values, a bogus agino will be too large.  there
-	 * will be extra bits set at the top that shouldn't be set.
-	 */
-	agbno = XFS_AGINO_TO_AGBNO(mp, agino);
-	if (agbno == 0)
-		return 1;
-
-	return verify_ag_bno(sbp, agno, agbno);
-}
-
 #define XR_DFSBNORANGE_VALID	0
 #define XR_DFSBNORANGE_BADSTART	1
 #define XR_DFSBNORANGE_BADEND	2
diff --git a/repair/dinode.h b/repair/dinode.h
index 4bf7affd..1bd0e0b7 100644
--- a/repair/dinode.h
+++ b/repair/dinode.h
@@ -68,11 +68,6 @@ verify_uncertain_dinode(xfs_mount_t *mp,
 		xfs_agnumber_t agno,
 		xfs_agino_t ino);
 
-int
-verify_aginum(xfs_mount_t	*mp,
-		xfs_agnumber_t	agno,
-		xfs_agino_t	agino);
-
 int
 process_uncertain_aginodes(xfs_mount_t		*mp,
 				xfs_agnumber_t	agno);
diff --git a/repair/scan.c b/repair/scan.c
index dcd4864d..76079247 100644
--- a/repair/scan.c
+++ b/repair/scan.c
@@ -1561,7 +1561,7 @@ verify_single_ino_chunk_align(
 	 * (NULLAGINO). if it gets closer, the agino number will be illegal as
 	 * the agbno will be too large.
 	 */
-	if (verify_aginum(mp, agno, ino)) {
+	if (!libxfs_verify_agino(mp, agno, ino)) {
 		do_warn(
 _("bad starting inode # (%" PRIu64 " (0x%x 0x%x)) in %s rec, skipping rec\n"),
 			lino, agno, ino, inobt_name);
@@ -1569,7 +1569,7 @@ _("bad starting inode # (%" PRIu64 " (0x%x 0x%x)) in %s rec, skipping rec\n"),
 		return ++suspect;
 	}
 
-	if (verify_aginum(mp, agno,
+	if (!libxfs_verify_agino(mp, agno,
 			ino + XFS_INODES_PER_CHUNK - 1)) {
 		do_warn(
 _("bad ending inode # (%" PRIu64 " (0x%x 0x%zx)) in %s rec, skipping rec\n"),

