Scrub the hash tree and all the entries in a directory.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/Makefile | 1
fs/xfs/libxfs/xfs_dir2_priv.h | 4 -
fs/xfs/libxfs/xfs_fs.h | 3
fs/xfs/scrub/common.c | 1
fs/xfs/scrub/common.h | 1
fs/xfs/scrub/dir.c | 268 +++++++++++++++++++++++++++++++++++++++++
fs/xfs/xfs_dir2_readdir.c | 19 ++-
fs/xfs/xfs_file.c | 2
fs/xfs/xfs_trace.h | 3
9 files changed, 291 insertions(+), 11 deletions(-)
create mode 100644 fs/xfs/scrub/dir.c
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 1b1ed40..c05f503 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -110,6 +110,7 @@ xfs-$(CONFIG_XFS_DEBUG) += $(addprefix scrub/, \
btree.o \
common.o \
dabtree.o \
+ dir.o \
ialloc.o \
inode.o \
refcount.o \
diff --git a/fs/xfs/libxfs/xfs_dir2_priv.h b/fs/xfs/libxfs/xfs_dir2_priv.h
index 1abd314..4cf2956 100644
--- a/fs/xfs/libxfs/xfs_dir2_priv.h
+++ b/fs/xfs/libxfs/xfs_dir2_priv.h
@@ -129,7 +129,7 @@ extern int xfs_dir2_sf_removename(struct xfs_da_args *args);
extern int xfs_dir2_sf_replace(struct xfs_da_args *args);
/* xfs_dir2_readdir.c */
-extern int xfs_readdir(struct xfs_inode *dp, struct dir_context *ctx,
- size_t bufsize);
+extern int xfs_readdir(struct xfs_trans *tp, struct xfs_inode *dp,
+ struct dir_context *ctx, size_t bufsize);
#endif /* __XFS_DIR2_PRIV_H__ */
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index eb32870..2a9b959 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -589,7 +589,8 @@ struct xfs_scrub_metadata {
#define XFS_SCRUB_TYPE_BMBTD 12 /* data fork block mapping */
#define XFS_SCRUB_TYPE_BMBTA 13 /* attr fork block mapping */
#define XFS_SCRUB_TYPE_BMBTC 14 /* CoW fork block mapping */
-#define XFS_SCRUB_TYPE_MAX 14
+#define XFS_SCRUB_TYPE_DIR 15 /* directory */
+#define XFS_SCRUB_TYPE_MAX 15
#define XFS_SCRUB_FLAG_REPAIR 0x01 /* i: repair this metadata */
#define XFS_SCRUB_FLAG_CORRUPT 0x02 /* o: needs repair */
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c
index 545c46a..a570d64 100644
--- a/fs/xfs/scrub/common.c
+++ b/fs/xfs/scrub/common.c
@@ -683,6 +683,7 @@ static const struct xfs_scrub_meta_fns meta_scrub_fns[] = {
{xfs_scrub_setup_inode_bmap, xfs_scrub_bmap_data, NULL, NULL},
{xfs_scrub_setup_inode_bmap, xfs_scrub_bmap_attr, NULL, NULL},
{xfs_scrub_setup_inode_bmap, xfs_scrub_bmap_cow, NULL, NULL},
+ {xfs_scrub_setup_inode, xfs_scrub_directory, NULL, NULL},
};
/* Dispatch metadata scrubbing. */
diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h
index 8c30e78..080596b 100644
--- a/fs/xfs/scrub/common.h
+++ b/fs/xfs/scrub/common.h
@@ -243,5 +243,6 @@ int xfs_scrub_inode(struct xfs_scrub_context *sc);
int xfs_scrub_bmap_data(struct xfs_scrub_context *sc);
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);
#endif /* __XFS_REPAIR_COMMON_H__ */
diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
new file mode 100644
index 0000000..ed29bd1
--- /dev/null
+++ b/fs/xfs/scrub/dir.c
@@ -0,0 +1,268 @@
+/*
+ * Copyright (C) 2017 Oracle. All Rights Reserved.
+ *
+ * Author: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
+ *
+ * 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_trace.h"
+#include "xfs_sb.h"
+#include "xfs_inode.h"
+#include "xfs_icache.h"
+#include "xfs_itable.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.h"
+#include "xfs_dir2.h"
+#include "xfs_dir2_priv.h"
+#include "scrub/common.h"
+#include "scrub/dabtree.h"
+
+/* Directories */
+
+/* Scrub a directory entry. */
+
+struct xfs_scrub_dir_ctx {
+ struct dir_context dc;
+ struct xfs_scrub_context *sc;
+};
+
+#define XFS_SCRUB_DIR_CHECK(fs_ok) \
+ XFS_SCRUB_DATA_CHECK(sdc->sc, XFS_DATA_FORK, offset, "dir", fs_ok)
+#define XFS_SCRUB_DIR_GOTO(fs_ok, label) \
+ XFS_SCRUB_DATA_GOTO(sdc->sc, XFS_DATA_FORK, offset, "dir", fs_ok, label)
+#define XFS_SCRUB_DIR_OP_ERROR_GOTO(label) \
+ XFS_SCRUB_FILE_OP_ERROR_GOTO(sdc->sc, XFS_DATA_FORK, offset, "dir", &error, label)
+/* Check that an inode's mode matches a given DT_ type. */
+STATIC int
+xfs_scrub_dir_check_ftype(
+ struct xfs_scrub_dir_ctx *sdc,
+ xfs_fileoff_t offset,
+ xfs_ino_t inum,
+ int dtype)
+{
+ struct xfs_mount *mp = sdc->sc->ip->i_mount;
+ struct xfs_inode *ip;
+ int ino_dtype;
+ int error = 0;
+
+ if (!xfs_sb_version_hasftype(&mp->m_sb)) {
+ XFS_SCRUB_DIR_CHECK(dtype == DT_UNKNOWN || dtype == DT_DIR);
+ goto out;
+ }
+
+ error = xfs_iget(mp, sdc->sc->tp, inum, 0, 0, &ip);
+ XFS_SCRUB_OP_ERROR_GOTO(sdc->sc,
+ XFS_INO_TO_AGNO(mp, inum),
+ XFS_INO_TO_AGBNO(mp, inum),
+ "inode", &error, out);
+ /* Convert mode to the DT_* values that dir_emit uses. */
+ ino_dtype = (VFS_I(ip)->i_mode & S_IFMT) >> 12;
+ XFS_SCRUB_DIR_CHECK(ino_dtype == dtype);
+ IRELE(ip);
+out:
+ return error;
+}
+
+/* Scrub a single directory entry. */
+STATIC int
+xfs_scrub_dir_actor(
+ struct dir_context *dc,
+ const char *name,
+ int namelen,
+ loff_t pos,
+ u64 ino,
+ unsigned type)
+{
+ struct xfs_mount *mp;
+ struct xfs_inode *ip;
+ struct xfs_scrub_dir_ctx *sdc;
+ struct xfs_name xname;
+ xfs_ino_t lookup_ino;
+ xfs_dablk_t offset;
+ int error = 0;
+
+ sdc = container_of(dc, struct xfs_scrub_dir_ctx, dc);
+ ip = sdc->sc->ip;
+ mp = ip->i_mount;
+ offset = xfs_dir2_db_to_da(mp->m_dir_geo,
+ xfs_dir2_dataptr_to_db(mp->m_dir_geo, pos));
+
+ /* Does this inode number make sense? */
+ XFS_SCRUB_DIR_GOTO(xfs_dir_ino_validate(mp, ino) == 0, out);
+ XFS_SCRUB_DIR_GOTO(!xfs_internal_inum(mp, ino), out);
+
+ /* Verify that we can look up this name by hash. */
+ xname.name = name;
+ xname.len = namelen;
+ xname.type = XFS_DIR3_FT_UNKNOWN;
+
+ error = xfs_dir_lookup(sdc->sc->tp, ip, &xname, &lookup_ino, NULL);
+ XFS_SCRUB_DIR_OP_ERROR_GOTO(fail_xref);
+ XFS_SCRUB_DIR_GOTO(lookup_ino == ino, out);
+
+ if (!memcmp(".", name, namelen)) {
+ /* If this is "." then check that the inum matches the dir. */
+ if (xfs_sb_version_hasftype(&mp->m_sb))
+ XFS_SCRUB_DIR_CHECK(type == DT_DIR);
+ XFS_SCRUB_DIR_CHECK(ino == ip->i_ino);
+ } else if (!memcmp("..", name, namelen)) {
+ /*
+ * If this is ".." in the root inode, check that the inum
+ * matches this dir.
+ */
+ if (xfs_sb_version_hasftype(&mp->m_sb))
+ XFS_SCRUB_DIR_CHECK(type == DT_DIR);
+ if (ip->i_ino == mp->m_sb.sb_rootino)
+ XFS_SCRUB_DIR_CHECK(ino == ip->i_ino);
+ }
+ if (error)
+ goto out;
+
+ /* Verify the file type. */
+ error = xfs_scrub_dir_check_ftype(sdc, offset, lookup_ino, type);
+ if (error)
+ goto out;
+out:
+ return error;
+fail_xref:
+ return error ? error : -EFSCORRUPTED;
+}
+#undef XFS_SCRUB_DIR_OP_ERROR_GOTO
+#undef XFS_SCRUB_DIR_GOTO
+#undef XFS_SCRUB_DIR_CHECK
+
+#define XFS_SCRUB_DIRENT_CHECK(fs_ok) \
+ XFS_SCRUB_DATA_CHECK(ds->sc, XFS_DATA_FORK, rec_bno, "dir", fs_ok)
+#define XFS_SCRUB_DIRENT_GOTO(fs_ok, label) \
+ XFS_SCRUB_DATA_GOTO(ds->sc, XFS_DATA_FORK, rec_bno, "dir", fs_ok, label)
+#define XFS_SCRUB_DIRENT_OP_ERROR_GOTO(label) \
+ XFS_SCRUB_FILE_OP_ERROR_GOTO(ds->sc, XFS_DATA_FORK, rec_bno, "dir", &error, label)
+/* Scrub a directory btree record. */
+STATIC int
+xfs_scrub_dir_rec(
+ struct xfs_scrub_da_btree *ds,
+ int level,
+ void *rec)
+{
+ struct xfs_mount *mp = ds->state->mp;
+ struct xfs_dir2_leaf_entry *ent = rec;
+ struct xfs_inode *dp = ds->dargs.dp;
+ struct xfs_dir2_data_entry *dent;
+ struct xfs_buf *bp;
+ xfs_ino_t ino;
+ xfs_dablk_t rec_bno;
+ xfs_dir2_db_t db;
+ xfs_dir2_data_aoff_t off;
+ xfs_dir2_dataptr_t ptr;
+ xfs_dahash_t calc_hash;
+ xfs_dahash_t hash;
+ unsigned int tag;
+ int error;
+
+ /* Check the hash of the entry. */
+ error = xfs_scrub_da_btree_hash(ds, level, &ent->hashval);
+ if (error)
+ goto out;
+
+ /* Valid hash pointer? */
+ ptr = be32_to_cpu(ent->address);
+ if (ptr == 0)
+ return 0;
+
+ /* Find the directory entry's location. */
+ db = xfs_dir2_dataptr_to_db(mp->m_dir_geo, ptr);
+ off = xfs_dir2_dataptr_to_off(mp->m_dir_geo, ptr);
+ rec_bno = xfs_dir2_db_to_da(mp->m_dir_geo, db);
+
+ XFS_SCRUB_DA_GOTO(ds, rec_bno < mp->m_dir_geo->leafblk, out);
+ error = xfs_dir3_data_read(ds->dargs.trans, dp, rec_bno, -2, &bp);
+ XFS_SCRUB_DIRENT_OP_ERROR_GOTO(out);
+ XFS_SCRUB_DIRENT_GOTO(bp != NULL, out);
+
+ /* Retrieve the entry and check it. */
+ dent = (struct xfs_dir2_data_entry *)(((char *)bp->b_addr) + off);
+ ino = be64_to_cpu(dent->inumber);
+ hash = be32_to_cpu(ent->hashval);
+ tag = be16_to_cpup(dp->d_ops->data_entry_tag_p(dent));
+ XFS_SCRUB_DIRENT_CHECK(xfs_dir_ino_validate(mp, ino) == 0);
+ XFS_SCRUB_DIRENT_CHECK(!xfs_internal_inum(mp, ino));
+ XFS_SCRUB_DIRENT_CHECK(tag == off);
+ XFS_SCRUB_DIRENT_GOTO(dent->namelen < MAXNAMELEN, out_relse);
+ calc_hash = xfs_da_hashname(dent->name, dent->namelen);
+ XFS_SCRUB_DIRENT_CHECK(calc_hash == hash);
+
+out_relse:
+ xfs_trans_brelse(ds->dargs.trans, bp);
+out:
+ return error;
+}
+#undef XFS_SCRUB_DIRENT_OP_ERROR_GOTO
+#undef XFS_SCRUB_DIRENT_GOTO
+#undef XFS_SCRUB_DIRENT_CHECK
+
+/* Scrub a whole directory. */
+int
+xfs_scrub_directory(
+ struct xfs_scrub_context *sc)
+{
+ struct xfs_scrub_dir_ctx sdc = {
+ .dc.actor = xfs_scrub_dir_actor,
+ .dc.pos = 0,
+ };
+ struct xfs_mount *mp = sc->tp->t_mountp;
+ size_t bufsize;
+ loff_t oldpos;
+ int error;
+
+ if (!S_ISDIR(VFS_I(sc->ip)->i_mode))
+ return -ENOENT;
+
+ /* Check directory tree structure */
+ error = xfs_scrub_da_btree(sc, XFS_DATA_FORK, xfs_scrub_dir_rec);
+ if (error)
+ return error;
+
+ /* Check that every dirent we see can also be looked up by hash. */
+ bufsize = (size_t)min_t(loff_t, 32768, sc->ip->i_d.di_size);
+ sdc.sc = sc;
+
+ oldpos = 0;
+ xfs_iunlock(sc->ip, XFS_ILOCK_EXCL);
+ while (true) {
+ error = xfs_readdir(sc->tp, sc->ip, &sdc.dc, bufsize);
+ XFS_SCRUB_OP_ERROR_GOTO(sc,
+ XFS_INO_TO_AGNO(mp, sc->ip->i_ino),
+ XFS_INO_TO_AGBNO(mp, sc->ip->i_ino),
+ "inode", &error, out_unlock);
+ if (oldpos == sdc.dc.pos)
+ break;
+ oldpos = sdc.dc.pos;
+ }
+
+out_unlock:
+ xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
+ return error;
+}
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 003a99b..0b3b636 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -181,7 +181,7 @@ xfs_dir2_block_getdents(
return 0;
lock_mode = xfs_ilock_data_map_shared(dp);
- error = xfs_dir3_block_read(NULL, dp, &bp);
+ error = xfs_dir3_block_read(args->trans, dp, &bp);
xfs_iunlock(dp, lock_mode);
if (error)
return error;
@@ -239,7 +239,7 @@ xfs_dir2_block_getdents(
if (!dir_emit(ctx, (char *)dep->name, dep->namelen,
be64_to_cpu(dep->inumber),
xfs_dir3_get_dtype(dp->i_mount, filetype))) {
- xfs_trans_brelse(NULL, bp);
+ xfs_trans_brelse(args->trans, bp);
return 0;
}
}
@@ -250,7 +250,7 @@ xfs_dir2_block_getdents(
*/
ctx->pos = xfs_dir2_db_off_to_dataptr(geo, geo->datablk + 1, 0) &
0x7fffffff;
- xfs_trans_brelse(NULL, bp);
+ xfs_trans_brelse(args->trans, bp);
return 0;
}
@@ -386,7 +386,7 @@ xfs_dir2_leaf_readbuf(
* Read the directory block starting at the first mapping.
*/
mip->curdb = xfs_dir2_da_to_db(geo, map->br_startoff);
- error = xfs_dir3_data_read(NULL, dp, map->br_startoff,
+ error = xfs_dir3_data_read(args->trans, dp, map->br_startoff,
map->br_blockcount >= geo->fsbcount ?
XFS_FSB_TO_DADDR(dp->i_mount, map->br_startblock) :
-1, &bp);
@@ -535,7 +535,7 @@ xfs_dir2_leaf_getdents(
bool trim_map = false;
if (bp) {
- xfs_trans_brelse(NULL, bp);
+ xfs_trans_brelse(args->trans, bp);
bp = NULL;
trim_map = true;
}
@@ -649,15 +649,21 @@ xfs_dir2_leaf_getdents(
ctx->pos = xfs_dir2_byte_to_dataptr(curoff) & 0x7fffffff;
kmem_free(map_info);
if (bp)
- xfs_trans_brelse(NULL, bp);
+ xfs_trans_brelse(args->trans, bp);
return error;
}
/*
* Read a directory.
+ *
+ * If supplied, the transaction collects locked dir buffers to avoid
+ * nested buffer deadlocks. This function does not dirty the
+ * transaction. The caller should ensure that the inode is locked
+ * before calling this function.
*/
int
xfs_readdir(
+ struct xfs_trans *tp,
struct xfs_inode *dp,
struct dir_context *ctx,
size_t bufsize)
@@ -676,6 +682,7 @@ xfs_readdir(
args.dp = dp;
args.geo = dp->i_mount->m_dir_geo;
+ args.trans = tp;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_getdents(&args, ctx);
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 4c87e60f..8e1ab59d 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -944,7 +944,7 @@ xfs_file_readdir(
*/
bufsize = (size_t)min_t(loff_t, 32768, ip->i_d.di_size);
- return xfs_readdir(ip, ctx, bufsize);
+ return xfs_readdir(NULL, ip, ctx, bufsize);
}
/*
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 141a39f..18b211f 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -3367,7 +3367,8 @@ DEFINE_GETFSMAP_EVENT(xfs_getfsmap_mapping);
{ XFS_SCRUB_TYPE_INODE, "inode" }, \
{ XFS_SCRUB_TYPE_BMBTD, "bmapbtd" }, \
{ XFS_SCRUB_TYPE_BMBTA, "bmapbta" }, \
- { XFS_SCRUB_TYPE_BMBTC, "bmapbtc" }
+ { XFS_SCRUB_TYPE_BMBTC, "bmapbtc" }, \
+ { XFS_SCRUB_TYPE_DIR, "dir" }
DECLARE_EVENT_CLASS(xfs_scrub_class,
TP_PROTO(struct xfs_inode *ip, int type, xfs_agnumber_t agno,
xfs_ino_t inum, unsigned int gen, unsigned int flags,
--
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