NFS: Move rpc_ops from nfs_server to nfs_client

Move the rpc_ops from the nfs_server struct to the nfs_client struct as they're
common to all server records of a particular NFS protocol version.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

7 files changed, 43 insertions, 34 deletions

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 067d144d141b..19362712452f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1147,7 +1147,7 @@ int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,
         }
         if (!(fattr->valid & NFS_ATTR_FATTR)) {
                 struct nfs_server *server = NFS_SB(dentry->d_sb);
-                error = server->rpc_ops->getattr(server, fhandle, fattr);
+                error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr);
                 if (error < 0)
                         goto out_err;
         }
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 6ed018c9aad2..771c3b833757 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -237,13 +237,13 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
                 /* Why so? Because we want revalidate for devices/FIFOs, and
                  * that's precisely what we have in nfs_file_inode_operations.
                  */
-                inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
+                inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
                 if (S_ISREG(inode->i_mode)) {
                         inode->i_fop = &nfs_file_operations;
                         inode->i_data.a_ops = &nfs_file_aops;
                         inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
                 } else if (S_ISDIR(inode->i_mode)) {
-                        inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
+                        inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
                         inode->i_fop = &nfs_dir_operations;
                         if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
                             && fattr->size <= NFS_LIMIT_READDIRPLUS)
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 85d9ed1dcf42..d8b8d56266cb 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -104,7 +104,9 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
                 goto out_follow;
         /* Look it up again */
         parent = dget_parent(nd->dentry);
-        err = server->rpc_ops->lookup(parent->d_inode, &nd->dentry->d_name, &fh, &fattr);
+        err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
+                                                  &nd->dentry->d_name,
+                                                  &fh, &fattr);
         dput(parent);
         if (err != 0)
                 goto out_err;
@@ -178,7 +180,7 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
 {
 #ifdef CONFIG_NFS_V4
         struct vfsmount *mnt = NULL;
-        switch (server->rpc_ops->version) {
+        switch (server->nfs_client->cl_nfsversion) {
                 case 2:
                 case 3:
                         mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b731b1945270..1573eeb07ce1 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -758,7 +758,7 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
         }
         nfs_confirm_seqid(&data->owner->so_seqid, 0);
         if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
-                return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
+                return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
         return 0;
 }
 
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d1b4a5b36e33..e1e5eab0259b 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -252,7 +252,7 @@ static int nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 
         lock_kernel();
 
-        error = server->rpc_ops->statfs(server, fh, &res);
+        error = server->nfs_client->rpc_ops->statfs(server, fh, &res);
         buf->f_type = NFS_SUPER_MAGIC;
         if (error < 0)
                 goto out_err;
@@ -343,10 +343,11 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
                 { 0, NULL, NULL }
         };
         const struct proc_nfs_info *nfs_infop;
+        struct nfs_client *clp = nfss->nfs_client;
         char buf[12];
         const char *proto;
 
-        seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
+        seq_printf(m, ",vers=%d", clp->rpc_ops->version);
         seq_printf(m, ",rsize=%d", nfss->rsize);
         seq_printf(m, ",wsize=%d", nfss->wsize);
         if (nfss->acregmin != 3*HZ || showdefaults)
@@ -427,7 +428,7 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
         seq_printf(m, ",namelen=%d", nfss->namelen);
 
 #ifdef CONFIG_NFS_V4
-        if (nfss->rpc_ops->version == 4) {
+        if (nfss->nfs_client->cl_nfsversion == 4) {
                 seq_printf(m, "\n\tnfsv4:\t");
                 seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
                 seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
@@ -503,7 +504,7 @@ nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *f
         struct nfs_server       *server = NFS_SB(sb);
         int                     error;
 
-        error = server->rpc_ops->getroot(server, rootfh, fsinfo);
+        error = server->nfs_client->rpc_ops->getroot(server, rootfh, fsinfo);
         if (error < 0) {
                 dprintk("nfs_get_root: getattr error = %d\n", -error);
                 return ERR_PTR(error);
@@ -553,14 +554,14 @@ nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
                 no_root_error = -ENOMEM;
                 goto out_no_root;
         }
-        sb->s_root->d_op = server->rpc_ops->dentry_ops;
+        sb->s_root->d_op = server->nfs_client->rpc_ops->dentry_ops;
 
         /* mount time stamp, in seconds */
         server->mount_time = jiffies;
 
         /* Get some general file system info */
         if (server->namelen == 0 &&
-            server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
+            server->nfs_client->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
                 server->namelen = pathinfo.max_namelen;
         /* Work out a lot of parameters */
         if (server->rsize == 0)
@@ -663,9 +664,14 @@ nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
         struct rpc_xprt         *xprt = NULL;
         struct rpc_clnt         *clnt = NULL;
         int                     proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
+        int                     nfsversion = 2;
 
-        clp = nfs_get_client(server->hostname, &server->addr,
-                             server->rpc_ops->version);
+#ifdef CONFIG_NFS_V3
+        if (server->flags & NFS_MOUNT_VER3)
+                nfsversion = 3;
+#endif
+
+        clp = nfs_get_client(server->hostname, &server->addr, nfsversion);
         if (!clp) {
                 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
                 return ERR_PTR(PTR_ERR(clp));
@@ -676,6 +682,19 @@ nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
         server->retrans_timeo = timeparms.to_initval;
         server->retrans_count = timeparms.to_retries;
 
+        /* Check NFS protocol revision and initialize RPC op vector
+         * and file handle pool. */
+#ifdef CONFIG_NFS_V3
+        if (nfsversion == 3) {
+                clp->rpc_ops = &nfs_v3_clientops;
+                server->caps |= NFS_CAP_READDIRPLUS;
+        } else {
+                clp->rpc_ops = &nfs_v2_clientops;
+        }
+#else
+        clp->rpc_ops = &nfs_v2_clientops;
+#endif
+
         /* create transport and client */
         xprt = xprt_create_proto(proto, &server->addr, &timeparms);
         if (IS_ERR(xprt)) {
@@ -686,7 +705,7 @@ nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
                 return (struct rpc_clnt *)xprt;
         }
         clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
-                                 server->rpc_ops->version, data->pseudoflavor);
+                                 clp->cl_nfsversion, data->pseudoflavor);
         if (IS_ERR(clnt)) {
                 dprintk("%s: cannot create RPC client. Error = %ld\n",
                                 __FUNCTION__, PTR_ERR(xprt));
@@ -750,7 +769,7 @@ static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_cl
         fsinfo.fattr = data->fattr;
         if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
                 nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
-        sb->s_root->d_op = server->rpc_ops->dentry_ops;
+        sb->s_root->d_op = server->nfs_client->rpc_ops->dentry_ops;
         sb->s_flags |= MS_ACTIVE;
         return server;
 out_put_root:
@@ -865,19 +884,6 @@ nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
                 return -ENOMEM;
         strcpy(server->hostname, data->hostname);
 
-        /* Check NFS protocol revision and initialize RPC op vector
-         * and file handle pool. */
-#ifdef CONFIG_NFS_V3
-        if (server->flags & NFS_MOUNT_VER3) {
-                server->rpc_ops = &nfs_v3_clientops;
-                server->caps |= NFS_CAP_READDIRPLUS;
-        } else {
-                server->rpc_ops = &nfs_v2_clientops;
-        }
-#else
-        server->rpc_ops = &nfs_v2_clientops;
-#endif
-
         /* Fill in pseudoflavor for mount version < 5 */
         if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
                 data->pseudoflavor = RPC_AUTH_UNIX;
@@ -888,6 +894,7 @@ nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
         server->client = nfs_create_client(server, data);
         if (IS_ERR(server->client))
                 return PTR_ERR(server->client);
+
         /* RFC 2623, sec 2.3.2 */
         if (authflavor != RPC_AUTH_UNIX) {
                 struct rpc_auth *auth;
@@ -1129,6 +1136,8 @@ static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
 
         /* Now create transport and client */
         if (clp->cl_cons_state == NFS_CS_INITING) {
+                clp->rpc_ops = &nfs_v4_clientops;
+
                 xprt = xprt_create_proto(proto, &server->addr, timeparms);
                 if (IS_ERR(xprt)) {
                         err = PTR_ERR(xprt);
@@ -1139,7 +1148,7 @@ static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
                 /* Bind to a reserved port! */
                 xprt->resvport = 1;
                 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
-                                server->rpc_ops->version, flavor);
+                                clp->cl_nfsversion, flavor);
                 if (IS_ERR(clnt)) {
                         err = PTR_ERR(clnt);
                         dprintk("%s: cannot create RPC client. Error = %d\n",
@@ -1215,8 +1224,6 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data,
         server->acdirmin = data->acdirmin*HZ;
         server->acdirmax = data->acdirmax*HZ;
 
-        server->rpc_ops = &nfs_v4_clientops;
-
         nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
 
         server->retrans_timeo = timeparms.to_initval;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 70e1dc9162e2..51e9bd90dedc 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -215,7 +215,7 @@ static inline struct nfs_inode *NFS_I(struct inode *inode)
 #define NFS_FH(inode)                   (&NFS_I(inode)->fh)
 #define NFS_SERVER(inode)               (NFS_SB(inode->i_sb))
 #define NFS_CLIENT(inode)               (NFS_SERVER(inode)->client)
-#define NFS_PROTO(inode)                (NFS_SERVER(inode)->rpc_ops)
+#define NFS_PROTO(inode)                (NFS_SERVER(inode)->nfs_client->rpc_ops)
 #define NFS_ADDR(inode)                 (RPC_PEERADDR(NFS_CLIENT(inode)))
 #define NFS_COOKIEVERF(inode)           (NFS_I(inode)->cookieverf)
 #define NFS_READTIME(inode)             (NFS_I(inode)->read_cache_jiffies)
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index e7d7662f51fd..aae7c117597a 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -25,6 +25,7 @@ struct nfs_client {
         struct list_head        cl_superblocks; /* List of nfs_server structs */
 
         struct rpc_clnt *       cl_rpcclient;
+        const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
 
 #ifdef CONFIG_NFS_V4
         u64                     cl_clientid;    /* constant */
@@ -74,7 +75,6 @@ struct nfs_server {
         struct rpc_clnt *       client;         /* RPC client handle */
         struct rpc_clnt *       client_sys;     /* 2nd handle for FSINFO */
         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
-        const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
         struct nfs_iostats *    io_stats;       /* I/O statistics */
         struct backing_dev_info backing_dev_info;
         int                     flags;          /* various flags */