Merge tag 'nfs-for-3.6-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull second wave of NFS client updates from Trond Myklebust:

 - Patches from Bryan to allow splitting of the NFSv2/v3/v4 code into
   separate modules.

 - Fix Oopses in the NFSv4 idmapper

 - Fix a deadlock whereby rpciod tries to allocate a new socket and ends
   up recursing into the NFS code due to memory reclaim.

 - Increase the number of permitted callback connections.

* tag 'nfs-for-3.6-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: explicitly reject LOCK_MAND flock() requests
  nfs: increase number of permitted callback connections.
  SUNRPC: return negative value in case rpcbind client creation error
  NFS: Convert v4 into a module
  NFS: Convert v3 into a module
  NFS: Convert v2 into a module
  NFS: Keep module parameters in the generic NFS client
  NFS: Split out remaining NFS v4 inode functions
  NFS: Pass super operations and xattr handlers in the nfs_subversion
  NFS: Only initialize the ACL client in the v3 case
  NFS: Create a try_mount rpc op
  NFS: Remove the NFS v4 xdev mount function
  NFS: Add version registering framework
  NFS: Fix a number of bugs in the idmapper
  nfs: skip commit in releasepage if we're freeing memory for fs-related reasons
  sunrpc: clarify comments on rpc_make_runnable
  pnfsblock: bail out partial page IO

1 files changed, 65 insertions, 0 deletions

diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
new file mode 100644
index 000000000000..b3fc65ef39ca
--- /dev/null
+++ b/fs/nfs/nfs3client.c
@@ -0,0 +1,65 @@
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include "internal.h"
+
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat          nfsacl_rpcstat = { &nfsacl_program };
+static const struct rpc_version *nfsacl_version[] = {
+        [3]                     = &nfsacl_version3,
+};
+
+const struct rpc_program nfsacl_program = {
+        .name                   = "nfsacl",
+        .number                 = NFS_ACL_PROGRAM,
+        .nrvers                 = ARRAY_SIZE(nfsacl_version),
+        .version                = nfsacl_version,
+        .stats                  = &nfsacl_rpcstat,
+};
+
+/*
+ * Initialise an NFSv3 ACL client connection
+ */
+static void nfs_init_server_aclclient(struct nfs_server *server)
+{
+        if (server->flags & NFS_MOUNT_NOACL)
+                goto out_noacl;
+
+        server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+        if (IS_ERR(server->client_acl))
+                goto out_noacl;
+
+        /* No errors! Assume that Sun nfsacls are supported */
+        server->caps |= NFS_CAP_ACLS;
+        return;
+
+out_noacl:
+        server->caps &= ~NFS_CAP_ACLS;
+}
+#else
+static inline void nfs_init_server_aclclient(struct nfs_server *server)
+{
+        server->flags &= ~NFS_MOUNT_NOACL;
+        server->caps &= ~NFS_CAP_ACLS;
+}
+#endif
+
+struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info,
+                                      struct nfs_subversion *nfs_mod)
+{
+        struct nfs_server *server = nfs_create_server(mount_info, nfs_mod);
+        /* Create a client RPC handle for the NFS v3 ACL management interface */
+        if (!IS_ERR(server))
+                nfs_init_server_aclclient(server);
+        return server;
+}
+
+struct nfs_server *nfs3_clone_server(struct nfs_server *source,
+                                     struct nfs_fh *fh,
+                                     struct nfs_fattr *fattr,
+                                     rpc_authflavor_t flavor)
+{
+        struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor);
+        if (!IS_ERR(server) && !IS_ERR(source->client_acl))
+                nfs_init_server_aclclient(server);
+        return server;
+}