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authorTrond Myklebust <Trond.Myklebust@netapp.com>2008-01-26 01:06:40 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-01-30 02:06:12 -0500
commit3fbd67ad61f6d5a09ea717b56c50bc5c3d8042a8 (patch)
treeffac0a032211517e9d0bc9ff21a09f8c21fdf1c3 /fs
parent57bfa89171e50cddf51a4f62c90e47c6259857b4 (diff)
downloadlinux-3fbd67ad61f6d5a09ea717b56c50bc5c3d8042a8.tar.gz
NFSv4: Iterate through all nfs_clients when the server recalls a delegation
The same delegation may have been handed out to more than one nfs_client. Ensure that if a recall occurs, we return all instances. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/callback_proc.c39
-rw-r--r--fs/nfs/client.c35
-rw-r--r--fs/nfs/internal.h1
3 files changed, 58 insertions, 17 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index e89a9007c91..15f7785048d 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -75,23 +75,28 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
dprintk("NFS: RECALL callback request from %s\n",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
- inode = nfs_delegation_find_inode(clp, &args->fh);
- if (inode == NULL)
- goto out_putclient;
- /* Set up a helper thread to actually return the delegation */
- switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
- case 0:
- res = 0;
- break;
- case -ENOENT:
- res = htonl(NFS4ERR_BAD_STATEID);
- break;
- default:
- res = htonl(NFS4ERR_RESOURCE);
- }
- iput(inode);
-out_putclient:
- nfs_put_client(clp);
+ do {
+ struct nfs_client *prev = clp;
+
+ inode = nfs_delegation_find_inode(clp, &args->fh);
+ if (inode != NULL) {
+ /* Set up a helper thread to actually return the delegation */
+ switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
+ case 0:
+ res = 0;
+ break;
+ case -ENOENT:
+ if (res != 0)
+ res = htonl(NFS4ERR_BAD_STATEID);
+ break;
+ default:
+ res = htonl(NFS4ERR_RESOURCE);
+ }
+ iput(inode);
+ }
+ clp = nfs_find_client_next(prev);
+ nfs_put_client(prev);
+ } while (clp != NULL);
out:
dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));
return res;
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 7a15832369e..685c43f810c 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -276,6 +276,41 @@ struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion)
}
/*
+ * Find a client by IP address and protocol version
+ * - returns NULL if no such client
+ */
+struct nfs_client *nfs_find_client_next(struct nfs_client *clp)
+{
+ struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr;
+ u32 nfsvers = clp->rpc_ops->version;
+
+ spin_lock(&nfs_client_lock);
+ list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) {
+ struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
+
+ /* Don't match clients that failed to initialise properly */
+ if (clp->cl_cons_state != NFS_CS_READY)
+ continue;
+
+ /* Different NFS versions cannot share the same nfs_client */
+ if (clp->rpc_ops->version != nfsvers)
+ continue;
+
+ if (sap->sa_family != clap->sa_family)
+ continue;
+ /* Match only the IP address, not the port number */
+ if (!nfs_sockaddr_match_ipaddr(sap, clap))
+ continue;
+
+ atomic_inc(&clp->cl_count);
+ spin_unlock(&nfs_client_lock);
+ return clp;
+ }
+ spin_unlock(&nfs_client_lock);
+ return NULL;
+}
+
+/*
* Find an nfs_client on the list that matches the initialisation data
* that is supplied.
*/
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index a8062119908..0f5619611b8 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -64,6 +64,7 @@ extern struct rpc_program nfs_program;
extern void nfs_put_client(struct nfs_client *);
extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32);
+extern struct nfs_client *nfs_find_client_next(struct nfs_client *);
extern struct nfs_server *nfs_create_server(
const struct nfs_parsed_mount_data *,
struct nfs_fh *);