From 537964bceb9a4c9e39a16a83042b80986d373453 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 17 Oct 2017 21:37:37 -0700 Subject: xfs: create helpers to scrub a metadata btree Create helper functions and tracepoints to deal with errors while scrubbing a metadata btree. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/scrub/btree.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 fs/xfs/scrub/btree.c (limited to 'fs/xfs/scrub/btree.c') diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c new file mode 100644 index 000000000000..28539081f604 --- /dev/null +++ b/fs/xfs/scrub/btree.c @@ -0,0 +1,114 @@ +/* + * Copyright (C) 2017 Oracle. All Rights Reserved. + * + * Author: Darrick J. Wong + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_trans_resv.h" +#include "xfs_mount.h" +#include "xfs_defer.h" +#include "xfs_btree.h" +#include "xfs_bit.h" +#include "xfs_log_format.h" +#include "xfs_trans.h" +#include "xfs_sb.h" +#include "xfs_inode.h" +#include "xfs_alloc.h" +#include "scrub/scrub.h" +#include "scrub/common.h" +#include "scrub/btree.h" +#include "scrub/trace.h" + +/* btree scrubbing */ + +/* + * Check for btree operation errors. See the section about handling + * operational errors in common.c. + */ +bool +xfs_scrub_btree_process_error( + struct xfs_scrub_context *sc, + struct xfs_btree_cur *cur, + int level, + int *error) +{ + if (*error == 0) + return true; + + switch (*error) { + case -EDEADLOCK: + /* Used to restart an op with deadlock avoidance. */ + trace_xfs_scrub_deadlock_retry(sc->ip, sc->sm, *error); + break; + case -EFSBADCRC: + case -EFSCORRUPTED: + /* Note the badness but don't abort. */ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + *error = 0; + /* fall through */ + default: + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) + trace_xfs_scrub_ifork_btree_op_error(sc, cur, level, + *error, __return_address); + else + trace_xfs_scrub_btree_op_error(sc, cur, level, + *error, __return_address); + break; + } + return false; +} + +/* Record btree block corruption. */ +void +xfs_scrub_btree_set_corrupt( + struct xfs_scrub_context *sc, + struct xfs_btree_cur *cur, + int level) +{ + sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; + + if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) + trace_xfs_scrub_ifork_btree_error(sc, cur, level, + __return_address); + else + trace_xfs_scrub_btree_error(sc, cur, level, + __return_address); +} + +/* + * Visit all nodes and leaves of a btree. Check that all pointers and + * records are in order, that the keys reflect the records, and use a callback + * so that the caller can verify individual records. The callback is the same + * as the one for xfs_btree_query_range, so therefore this function also + * returns XFS_BTREE_QUERY_RANGE_ABORT, zero, or a negative error code. + */ +int +xfs_scrub_btree( + struct xfs_scrub_context *sc, + struct xfs_btree_cur *cur, + xfs_scrub_btree_rec_fn scrub_fn, + struct xfs_owner_info *oinfo, + void *private) +{ + int error = -EOPNOTSUPP; + + xfs_scrub_btree_process_error(sc, cur, 0, &error); + return error; +} -- cgit v1.2.3