nfs41: establish sessions-based clientid

nfsv4.1 clientid is established via EXCHANGE_ID rather than
SETCLIENTID{,_CONFIRM}

This is implemented using a new establish_clid method in
nfs4_state_recovery_ops.

nfs41: establish clientid via exchange id only if cred != NULL

>From 2.6.26 reclaimer() uses machine cred for setting up the client id
therefore it is never expected to be NULL.

Signed-off-by: Rahul Iyer <iyer@netapp.com>
[removed dprintk]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: lease renewal]
[revamped patch for new nfs4_state_manager design]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 2b141c5758ecf27559a87a72e326a8aa822fe3d9..df9e363194995739535b16c67a21a70cfbd18985 100644 (file)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -178,6 +178,7 @@ struct nfs4_state_recovery_ops {
        int state_flag_bit;
        int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
        int (*recover_lock)(struct nfs4_state *, struct file_lock *);
+       int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
 };
 
 struct nfs4_state_maintenance_ops {
@@ -200,6 +201,7 @@ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struc
 extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait);
 extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
 extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
@@ -207,8 +209,8 @@ extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fh
 extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
                struct nfs4_fs_locations *fs_locations, struct page *page);
 
-extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
-extern struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops;
+extern struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[];
+extern struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[];
 #if defined(CONFIG_NFS_V4_1)
 extern int nfs4_setup_sequence(struct nfs_client *clp,
                struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f862a66e5fb9fb1a10b85d64676bd7da6fc337d4..dd46339095cea9aa16614cf0968227ca5938a220 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4780,19 +4780,41 @@ static int nfs41_proc_async_sequence(struct nfs_client *clp,
 
 #endif /* CONFIG_NFS_V4_1 */
 
-struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
+struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
        .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
        .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
        .recover_open   = nfs4_open_reclaim,
        .recover_lock   = nfs4_lock_reclaim,
+       .establish_clid = nfs4_init_clientid,
 };
 
-struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
+#if defined(CONFIG_NFS_V4_1)
+struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
+       .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
+       .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
+       .recover_open   = nfs4_open_reclaim,
+       .recover_lock   = nfs4_lock_reclaim,
+       .establish_clid = nfs4_proc_exchange_id,
+};
+#endif /* CONFIG_NFS_V4_1 */
+
+struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
+       .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
+       .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
+       .recover_open   = nfs4_open_expired,
+       .recover_lock   = nfs4_lock_expired,
+       .establish_clid = nfs4_init_clientid,
+};
+
+#if defined(CONFIG_NFS_V4_1)
+struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
        .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
        .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
        .recover_open   = nfs4_open_expired,
        .recover_lock   = nfs4_lock_expired,
+       .establish_clid = nfs4_proc_exchange_id,
 };
+#endif /* CONFIG_NFS_V4_1 */
 
 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
        .sched_state_renewal = nfs4_proc_async_renew,
@@ -4812,6 +4834,20 @@ struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
  * Per minor version reboot and network partition recovery ops
  */
 
+struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
+       &nfs40_reboot_recovery_ops,
+#if defined(CONFIG_NFS_V4_1)
+       &nfs41_reboot_recovery_ops,
+#endif
+};
+
+struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
+       &nfs40_nograce_recovery_ops,
+#if defined(CONFIG_NFS_V4_1)
+       &nfs41_nograce_recovery_ops,
+#endif
+};
+
 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
        &nfs40_state_renewal_ops,
 #if defined(CONFIG_NFS_V4_1)

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index da940abcfaa5cfefe7abedc086cefdfce893aa38..e17bd4412174b0be1822ceb591625bd0da8b53e1 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -60,7 +60,7 @@ const nfs4_stateid zero_stateid;
 
 static LIST_HEAD(nfs4_clientid_list);
 
-static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
+int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
 {
        unsigned short port;
        int status;
@@ -1098,11 +1098,13 @@ out:
 static int nfs4_reclaim_lease(struct nfs_client *clp)
 {
        struct rpc_cred *cred;
+       struct nfs4_state_recovery_ops *ops =
+               nfs4_reboot_recovery_ops[clp->cl_minorversion];
        int status = -ENOENT;
 
        cred = nfs4_get_setclientid_cred(clp);
        if (cred != NULL) {
-               status = nfs4_init_client(clp, cred);
+               status = ops->establish_clid(clp, cred);
                put_rpccred(cred);
                /* Handle case where the user hasn't set up machine creds */
                if (status == -EACCES && cred == clp->cl_machine_cred) {
@@ -1208,7 +1210,8 @@ static void nfs4_state_manager(struct nfs_client *clp)
                }
                /* First recover reboot state... */
                if (test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) {
-                       status = nfs4_do_reclaim(clp, &nfs4_reboot_recovery_ops);
+                       status = nfs4_do_reclaim(clp,
+                               nfs4_reboot_recovery_ops[clp->cl_minorversion]);
                        if (status == -NFS4ERR_STALE_CLIENTID)
                                continue;
                        if (test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
@@ -1219,7 +1222,8 @@ static void nfs4_state_manager(struct nfs_client *clp)
 
                /* Now recover expired state... */
                if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) {
-                       status = nfs4_do_reclaim(clp, &nfs4_nograce_recovery_ops);
+                       status = nfs4_do_reclaim(clp,
+                               nfs4_nograce_recovery_ops[clp->cl_minorversion]);
                        if (status < 0) {
                                set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state);
                                if (status == -NFS4ERR_STALE_CLIENTID)