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/scrub.c | 4 | ||||
| -rw-r--r-- | fs/xfs/scrub/scrub.h | 1 | ||||
| -rw-r--r-- | fs/xfs/scrub/symlink.c | 92 |
6 files changed, 102 insertions, 1 deletions
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index 94c9eaf34c27..9ffcc81b3b7f 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -156,5 +156,6 @@ xfs-y += $(addprefix scrub/, \ refcount.o \ rmap.o \ scrub.o \ + symlink.o \ ) endif diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 0834ce633518..bb8bcd0c32de 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -500,9 +500,10 @@ struct xfs_scrub_metadata { #define XFS_SCRUB_TYPE_BMBTC 14 /* CoW fork block mapping */ #define XFS_SCRUB_TYPE_DIR 15 /* directory */ #define XFS_SCRUB_TYPE_XATTR 16 /* extended attribute */ +#define XFS_SCRUB_TYPE_SYMLINK 17 /* symbolic link */ /* Number of scrub subcommands. */ -#define XFS_SCRUB_TYPE_NR 17 +#define XFS_SCRUB_TYPE_NR 18 /* 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 b938429658d9..b71c1a8d328b 100644 --- a/fs/xfs/scrub/common.h +++ b/fs/xfs/scrub/common.h @@ -97,6 +97,8 @@ int xfs_scrub_setup_directory(struct xfs_scrub_context *sc, struct xfs_inode *ip); int xfs_scrub_setup_xattr(struct xfs_scrub_context *sc, struct xfs_inode *ip); +int xfs_scrub_setup_symlink(struct xfs_scrub_context *sc, + struct xfs_inode *ip); void xfs_scrub_ag_free(struct xfs_scrub_context *sc, struct xfs_scrub_ag *sa); int xfs_scrub_ag_init(struct xfs_scrub_context *sc, xfs_agnumber_t agno, diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c index f3fc429e909b..14487279d460 100644 --- a/fs/xfs/scrub/scrub.c +++ b/fs/xfs/scrub/scrub.c @@ -239,6 +239,10 @@ static const struct xfs_scrub_meta_ops meta_scrub_ops[] = { .setup = xfs_scrub_setup_xattr, .scrub = xfs_scrub_xattr, }, + { /* symbolic link */ + .setup = xfs_scrub_setup_symlink, + .scrub = xfs_scrub_symlink, + }, }; /* 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 d31ff589d27d..dc4ed8de79d7 100644 --- a/fs/xfs/scrub/scrub.h +++ b/fs/xfs/scrub/scrub.h @@ -85,5 +85,6 @@ int xfs_scrub_bmap_attr(struct xfs_scrub_context *sc); int xfs_scrub_bmap_cow(struct xfs_scrub_context *sc); int xfs_scrub_directory(struct xfs_scrub_context *sc); int xfs_scrub_xattr(struct xfs_scrub_context *sc); +int xfs_scrub_symlink(struct xfs_scrub_context *sc); #endif /* __XFS_SCRUB_SCRUB_H__ */ diff --git a/fs/xfs/scrub/symlink.c b/fs/xfs/scrub/symlink.c new file mode 100644 index 000000000000..3aa3d60f7c16 --- /dev/null +++ b/fs/xfs/scrub/symlink.c @@ -0,0 +1,92 @@ +/* + * 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_inode.h" +#include "xfs_inode_fork.h" +#include "xfs_symlink.h" +#include "scrub/xfs_scrub.h" +#include "scrub/scrub.h" +#include "scrub/common.h" +#include "scrub/trace.h" + +/* Set us up to scrub a symbolic link. */ +int +xfs_scrub_setup_symlink( + struct xfs_scrub_context *sc, + struct xfs_inode *ip) +{ + /* Allocate the buffer without the inode lock held. */ + sc->buf = kmem_zalloc_large(XFS_SYMLINK_MAXLEN + 1, KM_SLEEP); + if (!sc->buf) + return -ENOMEM; + + return xfs_scrub_setup_inode_contents(sc, ip, 0); +} + +/* Symbolic links. */ + +int +xfs_scrub_symlink( + struct xfs_scrub_context *sc) +{ + struct xfs_inode *ip = sc->ip; + struct xfs_ifork *ifp; + loff_t len; + int error = 0; + + if (!S_ISLNK(VFS_I(ip)->i_mode)) + return -ENOENT; + ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); + len = ip->i_d.di_size; + + /* Plausible size? */ + if (len > XFS_SYMLINK_MAXLEN || len <= 0) { + xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0); + goto out; + } + + /* Inline symlink? */ + if (ifp->if_flags & XFS_IFINLINE) { + if (len > XFS_IFORK_DSIZE(ip) || + len > strnlen(ifp->if_u1.if_data, XFS_IFORK_DSIZE(ip))) + xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0); + goto out; + } + + /* Remote symlink; must read the contents. */ + error = xfs_readlink_bmap_ilocked(sc->ip, sc->buf); + if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, 0, &error)) + goto out; + if (strnlen(sc->buf, XFS_SYMLINK_MAXLEN) < len) + xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0); +out: + return error; +} |