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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /fs/xfs/scrub/symlink.c
parentInitial commit. (diff)
downloadlinux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz
linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/xfs/scrub/symlink.c')
-rw-r--r--fs/xfs/scrub/symlink.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/fs/xfs/scrub/symlink.c b/fs/xfs/scrub/symlink.c
new file mode 100644
index 000000000..f7ebaa946
--- /dev/null
+++ b/fs/xfs/scrub/symlink.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#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
+xchk_setup_symlink(
+ struct xfs_scrub *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 xchk_setup_inode_contents(sc, ip, 0);
+}
+
+/* Symbolic links. */
+
+int
+xchk_symlink(
+ struct xfs_scrub *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) {
+ xchk_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)))
+ xchk_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 (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
+ goto out;
+ if (strnlen(sc->buf, XFS_SYMLINK_MAXLEN) < len)
+ xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
+out:
+ return error;
+}