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Subject[PATCH 17/25] afs: Fix FS.FetchStatus delivery from updating wrong vnode [ver #2]
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The FS.FetchStatus reply delivery function was updating inode of the
directory in which a lookup had been done with the status of the looked up
file. This corrupts some of the directory state.

Fixes: 5cf9dd55a0ec ("afs: Prospectively look up extra files when doing a single lookup")
Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/afs/fsclient.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 5e3027f21390..f758750e81d8 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -2026,7 +2026,7 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call)
struct afs_file_status *status = call->reply[1];
struct afs_callback *callback = call->reply[2];
struct afs_volsync *volsync = call->reply[3];
- struct afs_vnode *vnode = call->reply[0];
+ struct afs_fid *fid = call->reply[0];
const __be32 *bp;
int ret;

@@ -2034,21 +2034,15 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call)
if (ret < 0)
return ret;

- _enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
+ _enter("{%llx:%llu}", fid->vid, fid->vnode);

/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- ret = afs_decode_status(call, &bp, status, vnode,
+ ret = afs_decode_status(call, &bp, status, NULL,
&call->expected_version, NULL);
if (ret < 0)
return ret;
- callback[call->count].version = ntohl(bp[0]);
- callback[call->count].expiry = ntohl(bp[1]);
- callback[call->count].type = ntohl(bp[2]);
- if (vnode)
- xdr_decode_AFSCallBack(call, vnode, &bp);
- else
- bp += 3;
+ xdr_decode_AFSCallBack_raw(&bp, callback);
if (volsync)
xdr_decode_AFSVolSync(&bp, volsync);

@@ -2089,7 +2083,7 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
}

call->key = fc->key;
- call->reply[0] = NULL; /* vnode for fid[0] */
+ call->reply[0] = fid;
call->reply[1] = status;
call->reply[2] = callback;
call->reply[3] = volsync;
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