NFS: Generalise the nfs_client structure

Generalise the nfs_client structure by:

 (1) Moving nfs_client to a more general place (nfs_fs_sb.h).

 (2) Renaming its maintenance routines to be non-NFS4 specific.

 (3) Move those maintenance routines to a new non-NFS4 specific file (client.c)
     and move the declarations to internal.h.

 (4) Make nfs_find/get_client() take a full sockaddr_in to include the port
     number (will be required for NFS2/3).

 (5) Make nfs_find/get_client() take the NFS protocol version (again will be
     required to differentiate NFS2, 3 & 4 client records).

Also:

 (6) Make nfs_client construction proceed akin to inodes, marking them as under
     construction and providing a function to indicate completion.

 (7) Make nfs_get_client() wait interruptibly if it finds a client that it can
     share, but that client is currently being constructed.

 (8) Make nfs4_create_client() use (6) and (7) instead of locking cl_sem.

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

1 files changed, 5 insertions, 4 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index cfe239736ac0..57133678db16 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -18,6 +18,7 @@
 
 #include "nfs4_fs.h"
 #include "delegation.h"
+#include "internal.h"
 
 static struct nfs_delegation *nfs_alloc_delegation(void)
 {
@@ -145,7 +146,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
                                         sizeof(delegation->stateid)) != 0 ||
                                 delegation->type != nfsi->delegation->type) {
                         printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n",
-                                        __FUNCTION__, NIPQUAD(clp->cl_addr));
+                                        __FUNCTION__, NIPQUAD(clp->cl_addr.sin_addr));
                         status = -EIO;
                 }
         }
@@ -254,7 +255,7 @@ restart:
         }
 out:
         spin_unlock(&clp->cl_lock);
-        nfs4_put_client(clp);
+        nfs_put_client(clp);
         module_put_and_exit(0);
 }
 
@@ -266,10 +267,10 @@ void nfs_expire_all_delegations(struct nfs_client *clp)
         atomic_inc(&clp->cl_count);
         task = kthread_run(nfs_do_expire_all_delegations, clp,
                         "%u.%u.%u.%u-delegreturn",
-                        NIPQUAD(clp->cl_addr));
+                        NIPQUAD(clp->cl_addr.sin_addr));
         if (!IS_ERR(task))
                 return;
-        nfs4_put_client(clp);
+        nfs_put_client(clp);
         module_put(THIS_MODULE);
 }