[PATCH 04/12] xfs: don't continue scrub if already corrupt

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

If we've already decided that something is corrupt, we might as well
abort all the loops and exit as quickly as possible.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 fs/xfs/scrub/attr.c   |    3 ++-
 fs/xfs/scrub/bmap.c   |    3 ++-
 fs/xfs/scrub/dir.c    |   34 +++++++++++++++++++++++++---------
 fs/xfs/scrub/parent.c |    3 +++
 4 files changed, 32 insertions(+), 11 deletions(-)


diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index 127575f0abfb..84b6d6b66578 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -126,8 +126,9 @@ xfs_scrub_xattr_listent(
 	if (args.valuelen != valuelen)
 		xfs_scrub_fblock_set_corrupt(sx->sc, XFS_ATTR_FORK,
 					     args.blkno);
-
 fail_xref:
+	if (sx->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		context->seen_enough = 1;
 	return;
 }
 
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index fb91caf17652..c28ff2ec201a 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -684,7 +684,8 @@ xfs_scrub_bmap(
 	info.lastoff = 0;
 	ifp = XFS_IFORK_PTR(ip, whichfork);
 	for_each_xfs_iext(ifp, &icur, &irec) {
-		if (xfs_scrub_should_terminate(sc, &error))
+		if (xfs_scrub_should_terminate(sc, &error) ||
+		    (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
 			break;
 		if (isnullstartblock(irec.br_startblock))
 			continue;
diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index 38f29806eb54..fb56a885f443 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -172,7 +172,7 @@ xfs_scrub_dir_actor(
 	error = xfs_dir_lookup(sdc->sc->tp, ip, &xname, &lookup_ino, NULL);
 	if (!xfs_scrub_fblock_process_error(sdc->sc, XFS_DATA_FORK, offset,
 			&error))
-		goto fail_xref;
+		goto out;
 	if (lookup_ino != ino) {
 		xfs_scrub_fblock_set_corrupt(sdc->sc, XFS_DATA_FORK, offset);
 		goto out;
@@ -183,8 +183,13 @@ xfs_scrub_dir_actor(
 	if (error)
 		goto out;
 out:
-	return error;
-fail_xref:
+	/*
+	 * A negative error code returned here is supposed to cause the
+	 * dir_emit caller (xfs_readdir) to abort the directory iteration
+	 * and return zero to xfs_scrub_dir.
+	 */
+	if (error == 0 && sdc->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		return -EFSCORRUPTED;
 	return error;
 }
 
@@ -240,6 +245,9 @@ xfs_scrub_dir_rec(
 	}
 	xfs_scrub_buffer_recheck(ds->sc, bp);
 
+	if (ds->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		goto out_relse;
+
 	dent = (struct xfs_dir2_data_entry *)(((char *)bp->b_addr) + off);
 
 	/* Make sure we got a real directory entry. */
@@ -357,6 +365,9 @@ xfs_scrub_directory_data_bestfree(
 
 	/* XXX: Check xfs_dir3_data_hdr.pad is zero once we start setting it. */
 
+	if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		goto out_buf;
+
 	/* Do the bestfrees correspond to actual free space? */
 	bf = d_ops->data_bestfree_p(bp->b_addr);
 	smallest_bestfree = UINT_MAX;
@@ -394,7 +405,7 @@ xfs_scrub_directory_data_bestfree(
 	endptr = xfs_dir3_data_endp(mp->m_dir_geo, bp->b_addr);
 
 	/* Iterate the entries, stopping when we hit or go past the end. */
-	while (ptr < endptr) {
+	while (ptr < endptr && !(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {
 		dup = (struct xfs_dir2_data_unused *)ptr;
 		/* Skip real entries */
 		if (dup->freetag != cpu_to_be16(XFS_DIR2_DATA_FREE_TAG)) {
@@ -413,8 +424,10 @@ xfs_scrub_directory_data_bestfree(
 
 		/* Spot check this free entry */
 		tag = be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup));
-		if (tag != ((char *)dup - (char *)bp->b_addr))
+		if (tag != ((char *)dup - (char *)bp->b_addr)) {
 			xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, lblk);
+			goto out_buf;
+		}
 
 		/*
 		 * Either this entry is a bestfree or it's smaller than
@@ -549,6 +562,8 @@ xfs_scrub_directory_leaf1_bestfree(
 
 	/* Check all the bestfree entries. */
 	for (i = 0; i < bestcount; i++, bestp++) {
+		if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+			break;
 		best = be16_to_cpu(*bestp);
 		if (best == NULLDATAOFF)
 			continue;
@@ -556,9 +571,10 @@ xfs_scrub_directory_leaf1_bestfree(
 				i * args->geo->fsbcount, -1, &dbp);
 		if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, lblk,
 				&error))
-			continue;
+			break;
 		xfs_scrub_directory_check_freesp(sc, lblk, dbp, best);
 		xfs_trans_brelse(sc->tp, dbp);
+
 	}
 out:
 	return error;
@@ -607,7 +623,7 @@ xfs_scrub_directory_free_bestfree(
 				-1, &dbp);
 		if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, lblk,
 				&error))
-			continue;
+			break;
 		xfs_scrub_directory_check_freesp(sc, lblk, dbp, best);
 		xfs_trans_brelse(sc->tp, dbp);
 	}
@@ -656,7 +672,7 @@ xfs_scrub_directory_blocks(
 
 	/* Iterate all the data extents in the directory... */
 	found = xfs_iext_lookup_extent(sc->ip, ifp, lblk, &icur, &got);
-	while (found) {
+	while (found && !(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {
 		/* Block directories only have a single block at offset 0. */
 		if (is_block &&
 		    (got.br_startoff > 0 ||
@@ -719,7 +735,7 @@ xfs_scrub_directory_blocks(
 	/* Scan for free blocks */
 	lblk = free_lblk;
 	found = xfs_iext_lookup_extent(sc->ip, ifp, lblk, &icur, &got);
-	while (found) {
+	while (found && !(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {
 		/*
 		 * Dirs can't have blocks mapped above 2^32.
 		 * Single-block dirs shouldn't even be here.
diff --git a/fs/xfs/scrub/parent.c b/fs/xfs/scrub/parent.c
index 1fb88c18d455..95fdd0d9e65d 100644
--- a/fs/xfs/scrub/parent.c
+++ b/fs/xfs/scrub/parent.c
@@ -147,6 +147,9 @@ xfs_scrub_parent_validate(
 
 	*try_again = false;
 
+	if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		return 0;
+
 	/* '..' must not point to ourselves. */
 	if (sc->ip->i_ino == dnum) {
 		xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);

--
To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [XFS Filesystem Development (older mail)]     [Linux Filesystem Development]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux RAID]     [Linux SCSI]


  Powered by Linux