This is a note to let you know that I've just added the patch titled
xfs: rename XFS_IGET_BULKSTAT to XFS_IGET_UNTRUSTED
to the 2.6.32-longterm tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/longterm/longterm-queue-2.6.32.git;a=summary
The filename of the patch is:
xfs-rename-xfs_iget_bulkstat-to-xfs_iget_untrusted.patch
and it can be found in the queue-2.6.32 subdirectory.
If you, or anyone else, feels it should not be added to the 2.6.32 longterm
tree,
please let <[email protected]> know about it.
>From [email protected] Thu Feb 17 14:33:55 2011
From: Dave Chinner <[email protected]>
Date: Mon, 10 Jan 2011 15:28:38 -0700
Subject: xfs: rename XFS_IGET_BULKSTAT to XFS_IGET_UNTRUSTED
To: Christoph Hellwig <[email protected]>, Dave Chinner <[email protected]>
Cc: [email protected], [email protected], Dave Chinner <[email protected]>
Message-ID: <[email protected]>
From: Dave Chinner <[email protected]>
Upstream commit: 1920779e67cbf5ea8afef317777c5bf2b8096188
Inode numbers may come from somewhere external to the filesystem
(e.g. file handles, bulkstat information) and so are inherently
untrusted. Rename the flag we use for these lookups to make it
obvious we are doing a lookup of an untrusted inode number and need
to verify it completely before trying to read it from disk.
Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
[dannf: backported to 2.6.32.y]
Cc: dann frazier <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/xfs/linux-2.6/xfs_export.c | 9 ++++-----
fs/xfs/xfs_ialloc.c | 11 +++++++----
fs/xfs/xfs_inode.c | 2 +-
fs/xfs/xfs_inode.h | 2 +-
fs/xfs/xfs_itable.c | 2 +-
5 files changed, 14 insertions(+), 12 deletions(-)
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -127,12 +127,11 @@ xfs_nfs_get_inode(
return ERR_PTR(-ESTALE);
/*
- * The XFS_IGET_BULKSTAT means that an invalid inode number is just
- * fine and not an indication of a corrupted filesystem. Because
- * clients can send any kind of invalid file handle, e.g. after
- * a restore on the server we have to deal with this case gracefully.
+ * The XFS_IGET_UNTRUSTED means that an invalid inode number is just
+ * fine and not an indication of a corrupted filesystem as clients can
+ * send invalid file handles and we have to handle it gracefully..
*/
- error = xfs_iget(mp, NULL, ino, XFS_IGET_BULKSTAT,
+ error = xfs_iget(mp, NULL, ino, XFS_IGET_UNTRUSTED,
XFS_ILOCK_SHARED, &ip, 0);
if (error) {
/*
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -1256,7 +1256,7 @@ xfs_imap_lookup(
return error;
/* for untrusted inodes check it is allocated first */
- if ((flags & XFS_IGET_BULKSTAT) &&
+ if ((flags & XFS_IGET_UNTRUSTED) &&
(rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino)))
return EINVAL;
@@ -1297,8 +1297,11 @@ xfs_imap(
if (agno >= mp->m_sb.sb_agcount || agbno >= mp->m_sb.sb_agblocks ||
ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
#ifdef DEBUG
- /* no diagnostics for bulkstat, ino comes from userspace */
- if (flags & XFS_IGET_BULKSTAT)
+ /*
+ * Don't output diagnostic information for untrusted inodes
+ * as they can be invalid without implying corruption.
+ */
+ if (flags & XFS_IGET_UNTRUSTED)
return XFS_ERROR(EINVAL);
if (agno >= mp->m_sb.sb_agcount) {
xfs_fs_cmn_err(CE_ALERT, mp,
@@ -1334,7 +1337,7 @@ xfs_imap(
* inodes in stale state on disk. Hence we have to do a btree lookup
* in all cases where an untrusted inode number is passed.
*/
- if (flags & XFS_IGET_BULKSTAT) {
+ if (flags & XFS_IGET_UNTRUSTED) {
error = xfs_imap_lookup(mp, tp, agno, agino, agbno,
&chunk_agbno, &offset_agbno, flags);
if (error)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -177,7 +177,7 @@ xfs_imap_to_bp(
if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
XFS_ERRTAG_ITOBP_INOTOBP,
XFS_RANDOM_ITOBP_INOTOBP))) {
- if (iget_flags & XFS_IGET_BULKSTAT) {
+ if (iget_flags & XFS_IGET_UNTRUSTED) {
xfs_trans_brelse(tp, bp);
return XFS_ERROR(EINVAL);
}
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -558,7 +558,7 @@ do { \
* Flags for xfs_iget()
*/
#define XFS_IGET_CREATE 0x1
-#define XFS_IGET_BULKSTAT 0x2
+#define XFS_IGET_UNTRUSTED 0x2
int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
xfs_ino_t, struct xfs_dinode **,
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -80,7 +80,7 @@ xfs_bulkstat_one_int(
return XFS_ERROR(ENOMEM);
error = xfs_iget(mp, NULL, ino,
- XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno);
+ XFS_IGET_UNTRUSTED, XFS_ILOCK_SHARED, &ip, bno);
if (error) {
*stat = BULKSTAT_RV_NOTHING;
goto out_free;
Patches currently in longterm-queue-2.6.32 which might be from
[email protected] are
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