nfs4.1: Add SP4_MACH_CRED cleanup support

CLOSE and LOCKU can use the machine credential.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 18 insertions, 1 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ab6ee1dffd7b..cba486a18f1e 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2615,6 +2615,9 @@ int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
         };
         int status = -ENOMEM;
 
+        nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
+                &task_setup_data.rpc_client, &msg);
+
         calldata = kzalloc(sizeof(*calldata), gfp_mask);
         if (calldata == NULL)
                 goto out;
@@ -5230,6 +5233,9 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
                 .flags = RPC_TASK_ASYNC,
         };
 
+        nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
+                NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
+
         /* Ensure this is an unlock - when canceling a lock, the
          * canceled lock is passed in, and it won't be an unlock.
          */
@@ -6117,7 +6123,8 @@ out:
 }
 
 /*
- * Minimum set of SP4_MACH_CRED operations from RFC 5661
+ * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
+ * and operations we'd like to see to enable certain features in the allow map
  */
 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
         .how = SP4_MACH_CRED,
@@ -6127,6 +6134,10 @@ static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
                       1 << (OP_CREATE_SESSION - 32) |
                       1 << (OP_DESTROY_SESSION - 32) |
                       1 << (OP_DESTROY_CLIENTID - 32)
+        },
+        .allow.u.words = {
+                [0] = 1 << (OP_CLOSE) |
+                      1 << (OP_LOCKU)
         }
 };
 
@@ -6186,6 +6197,12 @@ static int nfs4_sp4_select_mode(struct nfs_client *clp,
                         dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
                         return -EINVAL;
                 }
+
+                if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
+                    test_bit(OP_LOCKU, sp->allow.u.longs)) {
+                        dfprintk(MOUNT, "  cleanup mode enabled\n");
+                        set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
+                }
         }
 
         return 0;