diff options
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/Makefile | 1 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 3 | ||||
| -rw-r--r-- | fs/xfs/scrub/common.h | 2 | ||||
| -rw-r--r-- | fs/xfs/scrub/rmap.c | 138 | ||||
| -rw-r--r-- | fs/xfs/scrub/scrub.c | 5 | ||||
| -rw-r--r-- | fs/xfs/scrub/scrub.h | 1 |
6 files changed, 149 insertions, 1 deletions
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index 09232f6bcc7e..61fb2814659c 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -148,6 +148,7 @@ xfs-y += $(addprefix scrub/, \ btree.o \ common.o \ ialloc.o \ + rmap.o \ scrub.o \ ) endif diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 74df6ecfe5dc..fb1d99798e3d 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -492,9 +492,10 @@ struct xfs_scrub_metadata { #define XFS_SCRUB_TYPE_CNTBT 6 /* freesp by length btree */ #define XFS_SCRUB_TYPE_INOBT 7 /* inode btree */ #define XFS_SCRUB_TYPE_FINOBT 8 /* free inode btree */ +#define XFS_SCRUB_TYPE_RMAPBT 9 /* reverse mapping btree */ /* Number of scrub subcommands. */ -#define XFS_SCRUB_TYPE_NR 9 +#define XFS_SCRUB_TYPE_NR 10 /* i: Repair this metadata. */ #define XFS_SCRUB_IFLAG_REPAIR (1 << 0) diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h index 17830b8bf9e5..792277528209 100644 --- a/fs/xfs/scrub/common.h +++ b/fs/xfs/scrub/common.h @@ -83,6 +83,8 @@ int xfs_scrub_setup_ag_allocbt(struct xfs_scrub_context *sc, struct xfs_inode *ip); int xfs_scrub_setup_ag_iallocbt(struct xfs_scrub_context *sc, struct xfs_inode *ip); +int xfs_scrub_setup_ag_rmapbt(struct xfs_scrub_context *sc, + struct xfs_inode *ip); void xfs_scrub_ag_free(struct xfs_scrub_context *sc, struct xfs_scrub_ag *sa); diff --git a/fs/xfs/scrub/rmap.c b/fs/xfs/scrub/rmap.c new file mode 100644 index 000000000000..97846c424690 --- /dev/null +++ b/fs/xfs/scrub/rmap.c @@ -0,0 +1,138 @@ +/* + * Copyright (C) 2017 Oracle. All Rights Reserved. + * + * Author: Darrick J. Wong <darrick.wong@oracle.com> + * + * 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_alloc.h" +#include "xfs_ialloc.h" +#include "xfs_rmap.h" +#include "scrub/xfs_scrub.h" +#include "scrub/scrub.h" +#include "scrub/common.h" +#include "scrub/btree.h" +#include "scrub/trace.h" + +/* + * Set us up to scrub reverse mapping btrees. + */ +int +xfs_scrub_setup_ag_rmapbt( + struct xfs_scrub_context *sc, + struct xfs_inode *ip) +{ + return xfs_scrub_setup_ag_btree(sc, ip, false); +} + +/* Reverse-mapping scrubber. */ + +/* Scrub an rmapbt record. */ +STATIC int +xfs_scrub_rmapbt_rec( + struct xfs_scrub_btree *bs, + union xfs_btree_rec *rec) +{ + struct xfs_mount *mp = bs->cur->bc_mp; + struct xfs_rmap_irec irec; + xfs_agnumber_t agno = bs->cur->bc_private.a.agno; + bool non_inode; + bool is_unwritten; + bool is_bmbt; + bool is_attr; + int error; + + error = xfs_rmap_btrec_to_irec(rec, &irec); + if (!xfs_scrub_btree_process_error(bs->sc, bs->cur, 0, &error)) + goto out; + + /* Check extent. */ + if (irec.rm_startblock + irec.rm_blockcount <= irec.rm_startblock) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + + if (irec.rm_owner == XFS_RMAP_OWN_FS) { + /* + * xfs_verify_agbno returns false for static fs metadata. + * Since that only exists at the start of the AG, validate + * that by hand. + */ + if (irec.rm_startblock != 0 || + irec.rm_blockcount != XFS_AGFL_BLOCK(mp) + 1) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + } else { + /* + * Otherwise we must point somewhere past the static metadata + * but before the end of the FS. Run the regular check. + */ + if (!xfs_verify_agbno(mp, agno, irec.rm_startblock) || + !xfs_verify_agbno(mp, agno, irec.rm_startblock + + irec.rm_blockcount - 1)) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + } + + /* Check flags. */ + non_inode = XFS_RMAP_NON_INODE_OWNER(irec.rm_owner); + is_bmbt = irec.rm_flags & XFS_RMAP_BMBT_BLOCK; + is_attr = irec.rm_flags & XFS_RMAP_ATTR_FORK; + is_unwritten = irec.rm_flags & XFS_RMAP_UNWRITTEN; + + if (is_bmbt && irec.rm_offset != 0) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + + if (non_inode && irec.rm_offset != 0) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + + if (is_unwritten && (is_bmbt || non_inode || is_attr)) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + + if (non_inode && (is_bmbt || is_unwritten || is_attr)) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + + if (!non_inode) { + if (!xfs_verify_ino(mp, irec.rm_owner)) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + } else { + /* Non-inode owner within the magic values? */ + if (irec.rm_owner <= XFS_RMAP_OWN_MIN || + irec.rm_owner > XFS_RMAP_OWN_FS) + xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); + } +out: + return error; +} + +/* Scrub the rmap btree for some AG. */ +int +xfs_scrub_rmapbt( + struct xfs_scrub_context *sc) +{ + struct xfs_owner_info oinfo; + + xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_AG); + return xfs_scrub_btree(sc, sc->sa.rmap_cur, xfs_scrub_rmapbt_rec, + &oinfo, NULL); +} diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c index 1303194941f3..fcaf586ef15f 100644 --- a/fs/xfs/scrub/scrub.c +++ b/fs/xfs/scrub/scrub.c @@ -191,6 +191,11 @@ static const struct xfs_scrub_meta_ops meta_scrub_ops[] = { .scrub = xfs_scrub_finobt, .has = xfs_sb_version_hasfinobt, }, + { /* rmapbt */ + .setup = xfs_scrub_setup_ag_rmapbt, + .scrub = xfs_scrub_rmapbt, + .has = xfs_sb_version_hasrmapbt, + }, }; /* This isn't a stable feature, warn once per day. */ diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h index 5d97453008a0..0d1e78be88c2 100644 --- a/fs/xfs/scrub/scrub.h +++ b/fs/xfs/scrub/scrub.h @@ -75,5 +75,6 @@ int xfs_scrub_bnobt(struct xfs_scrub_context *sc); int xfs_scrub_cntbt(struct xfs_scrub_context *sc); int xfs_scrub_inobt(struct xfs_scrub_context *sc); int xfs_scrub_finobt(struct xfs_scrub_context *sc); +int xfs_scrub_rmapbt(struct xfs_scrub_context *sc); #endif /* __XFS_SCRUB_SCRUB_H__ */ |