Merge tag 'nfs-for-3.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes and cleanups from Trond Myklebust:

 - NLM: stable fix for NFSv2/v3 blocking locks

 - NFSv4.x: stable fixes for the delegation recall error handling code

 - NFSv4.x: Security flavour negotiation fixes and cleanups by Chuck
   Lever

 - SUNRPC: A number of RPCSEC_GSS fixes and cleanups also from Chuck

 - NFSv4.x assorted state management and reboot recovery bugfixes

 - NFSv4.1: In cases where we have already looked up a file, and hold a
   valid filehandle, use the new open-by-filehandle operation instead of
   opening by name.

 - Allow the NFSv4.1 callback thread to freeze

 - NFSv4.x: ensure that file unlock waits for readahead to complete

 - NFSv4.1: ensure that the RPC layer doesn't override the NFS session
   table size negotiation by limiting the number of slots.

 - NFSv4.x: Fix SETATTR spec compatibility issues

* tag 'nfs-for-3.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (67 commits)
  NFSv4: Warn once about servers that incorrectly apply open mode to setattr
  NFSv4: Servers should only check SETATTR stateid open mode on size change
  NFSv4: Don't recheck permissions on open in case of recovery cached open
  NFSv4.1: Don't do a delegated open for NFS4_OPEN_CLAIM_DELEG_CUR_FH modes
  NFSv4.1: Use the more efficient open_noattr call for open-by-filehandle
  NFS: Retry SETCLIENTID with AUTH_SYS instead of AUTH_NONE
  NFSv4: Ensure that we clear the NFS_OPEN_STATE flag when appropriate
  LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot
  NFSv4: Ensure the LOCK call cannot use the delegation stateid
  NFSv4: Use the open stateid if the delegation has the wrong mode
  nfs: Send atime and mtime as a 64bit value
  NFSv4: Record the OPEN create mode used in the nfs4_opendata structure
  NFSv4.1: Set the RPC_CLNT_CREATE_INFINITE_SLOTS flag for NFSv4.1 transports
  SUNRPC: Allow rpc_create() to request that TCP slots be unlimited
  SUNRPC: Fix a livelock problem in the xprt->backlog queue
  NFSv4: Fix handling of revoked delegations by setattr
  NFSv4 release the sequence id in the return on close case
  nfs: remove unnecessary check for NULL inode->i_flock from nfs_delegation_claim_locks
  NFS: Ensure that NFS file unlock waits for readahead to complete
  NFS: Add functionality to allow waiting on all outstanding reads to complete
  ...

1 files changed, 32 insertions, 11 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index d5f35f15af98..d259fa966927 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -411,6 +411,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
 	};
 	char servername[48];
 
+	if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS)
+		xprtargs.flags |= XPRT_CREATE_INFINITE_SLOTS;
 	/*
 	 * If the caller chooses not to specify a hostname, whip
 	 * up a string representation of the passed-in address.
@@ -1301,6 +1303,8 @@ call_reserve(struct rpc_task *task)
 	xprt_reserve(task);
 }
 
+static void call_retry_reserve(struct rpc_task *task);
+
 /*
  * 1b.	Grok the result of xprt_reserve()
  */
@@ -1342,7 +1346,7 @@ call_reserveresult(struct rpc_task *task)
 	case -ENOMEM:
 		rpc_delay(task, HZ >> 2);
 	case -EAGAIN:	/* woken up; retry */
-		task->tk_action = call_reserve;
+		task->tk_action = call_retry_reserve;
 		return;
 	case -EIO:	/* probably a shutdown */
 		break;
@@ -1355,6 +1359,19 @@ call_reserveresult(struct rpc_task *task)
 }
 
 /*
+ * 1c.	Retry reserving an RPC call slot
+ */
+static void
+call_retry_reserve(struct rpc_task *task)
+{
+	dprint_status(task);
+
+	task->tk_status  = 0;
+	task->tk_action  = call_reserveresult;
+	xprt_retry_reserve(task);
+}
+
+/*
  * 2.	Bind and/or refresh the credentials
  */
 static void
@@ -1639,22 +1656,26 @@ call_connect_status(struct rpc_task *task)
 
 	dprint_status(task);
 
-	task->tk_status = 0;
-	if (status >= 0 || status == -EAGAIN) {
-		clnt->cl_stats->netreconn++;
-		task->tk_action = call_transmit;
-		return;
-	}
-
 	trace_rpc_connect_status(task, status);
 	switch (status) {
 		/* if soft mounted, test if we've timed out */
 	case -ETIMEDOUT:
 		task->tk_action = call_timeout;
-		break;
-	default:
-		rpc_exit(task, -EIO);
+		return;
+	case -ECONNREFUSED:
+	case -ECONNRESET:
+	case -ENETUNREACH:
+		if (RPC_IS_SOFTCONN(task))
+			break;
+		/* retry with existing socket, after a delay */
+	case 0:
+	case -EAGAIN:
+		task->tk_status = 0;
+		clnt->cl_stats->netreconn++;
+		task->tk_action = call_transmit;
+		return;
 	}
+	rpc_exit(task, status);
 }
 
 /*