NLM: Decode "priv" argument of NLMPROC_SM_NOTIFY as an opaque
The NLM XDR decoders for the NLMPROC_SM_NOTIFY procedure should treat
their "priv" argument truly as an opaque, as defined by the protocol,
and let the upper layers figure out what is in it.
This will make it easier to modify the contents and interpretation of
the "priv" argument, and keep knowledge about what's in "priv" local
to fs/lockd/mon.c.
For now, the NLM and NSM implementations should behave exactly as they
did before.
The formation of the address of the rebooted host in
nlm_host_rebooted() may look a little strange, but it is the inverse
of how nsm_init_private() forms the private cookie. Plus, it's
going away soon anyway.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index ed10338..dc41e46 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -453,9 +453,10 @@
*/
void nlm_host_rebooted(const struct nlm_reboot *info)
{
+ __be32 *p = (__be32 *)&info->priv.data;
const struct sockaddr_in sin = {
.sin_family = AF_INET,
- .sin_addr.s_addr = info->addr,
+ .sin_addr.s_addr = *p,
};
struct hlist_head *chain;
struct hlist_node *pos;
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 1f22629..4cc7d01 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -349,8 +349,8 @@
if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
return 0;
argp->state = ntohl(*p++);
- /* Preserve the address in network byte order */
- argp->addr = *p++;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
+ p += XDR_QUADLEN(SM_PRIV_SIZE);
return xdr_argsize_check(rqstp, p);
}
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 50c493a..61d1714 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -356,8 +356,8 @@
if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
return 0;
argp->state = ntohl(*p++);
- /* Preserve the address in network byte order */
- argp->addr = *p++;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
+ p += XDR_QUADLEN(SM_PRIV_SIZE);
return xdr_argsize_check(rqstp, p);
}
diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
index 6b51992..6338866 100644
--- a/include/linux/lockd/xdr.h
+++ b/include/linux/lockd/xdr.h
@@ -83,10 +83,10 @@
* statd callback when client has rebooted
*/
struct nlm_reboot {
- char * mon;
- unsigned int len;
- u32 state;
- __be32 addr;
+ char *mon;
+ unsigned int len;
+ u32 state;
+ struct nsm_private priv;
};
/*