Merge tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Highlights incluse:

  Features:
   - Removing the forced serialisation of open()/close() calls in
     NFSv4.x (x>0) makes for a significant performance improvement in
     metadata intensive workloads.
   - Full support for the pNFS "flexible files" layout type
   - Further RPC/RDMA client improvements from Chuck

  Bugfixes:
   - Stable fix: NFSv4.1 backchannel calls blocking operations with !TASK_RUNNING
   - Stable fix: pnfs_generic_pg_init_read/write can be called with lseg == NULL
   - Stable fix: Fix an Oopsable condition when nsm_mon_unmon is called
     as part of the namespace cleanup,
   - Stable fix: Ensure we reference the inode for return-on-close in
     delegreturn
   - Use SO_REUSEPORT to ensure that NFSv3 TCP connections can rebind to
     the same source address/port combination during a disconnect/
     reconnect event.  This is a requirement imposed by most NFSv3
     server duplicate reply cache implementations.

  Optimisations:
   - Ask for no NFSv4.1 delegations on OPEN if using O_DIRECT

  Other:
   - Add Anna Schumaker as co-maintainer for the NFS client"

* tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (119 commits)
  SUNRPC: Cleanup to remove xs_tcp_close()
  pnfs: delete an unintended goto
  pnfs/flexfiles: Do not dprintk after the free
  SUNRPC: Fix stupid typo in xs_sock_set_reuseport
  SUNRPC: Define xs_tcp_fin_timeout only if CONFIG_SUNRPC_DEBUG
  SUNRPC: Handle connection reset more efficiently.
  SUNRPC: Remove the redundant XPRT_CONNECTION_CLOSE flag
  SUNRPC: Make xs_tcp_close() do a socket shutdown rather than a sock_release
  SUNRPC: Ensure xs_tcp_shutdown() requests a full close of the connection
  SUNRPC: Cleanup to remove remaining uses of XPRT_CONNECTION_ABORT
  SUNRPC: Remove TCP socket linger code
  SUNRPC: Remove TCP client connection reset hack
  SUNRPC: TCP/UDP always close the old socket before reconnecting
  SUNRPC: Add helpers to prevent socket create from racing
  SUNRPC: Ensure xs_reset_transport() resets the close connection flags
  SUNRPC: Do not clear the source port in xs_reset_transport
  SUNRPC: Handle EADDRINUSE on connect
  SUNRPC: Set SO_REUSEPORT socket option for TCP connections
  NFSv4.1: Fix pnfs_put_lseg races
  NFSv4.1: pnfs_send_layoutreturn should use GFP_NOFS
  ...

10 files changed, 63 insertions, 19 deletions

diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 022b761dbf0a..de7c91ca427e 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -516,6 +516,7 @@ enum pnfs_layouttype {
 	LAYOUT_NFSV4_1_FILES  = 1,
 	LAYOUT_OSD2_OBJECTS = 2,
 	LAYOUT_BLOCK_VOLUME = 3,
+	LAYOUT_FLEX_FILES = 4,
 };
 
 /* used for both layout return and recall */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index ddea982355f3..5e1273d4de14 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -77,10 +77,6 @@ struct nfs_client {
 	/* Client owner identifier */
 	const char *		cl_owner_id;
 
-	/* Our own IP address, as a null-terminated string.
-	 * This is used to generate the mv0 callback address.
-	 */
-	char			cl_ipaddr[48];
 	u32			cl_cb_ident;	/* v4.0 callback identifier */
 	const struct nfs4_minor_version_ops *cl_mvops;
 	unsigned long		cl_mig_gen;
@@ -108,6 +104,11 @@ struct nfs_client {
 #define NFS_SP4_MACH_CRED_COMMIT   6	/* COMMIT */
 #endif /* CONFIG_NFS_V4 */
 
+	/* Our own IP address, as a null-terminated string.
+	 * This is used to generate the mv0 callback address.
+	 */
+	char			cl_ipaddr[48];
+
 #ifdef CONFIG_NFS_FSCACHE
 	struct fscache_cookie	*fscache;	/* client index cache cookie */
 #endif
diff --git a/include/linux/nfs_idmap.h b/include/linux/nfs_idmap.h
index 0f4b79da6584..333844e38f66 100644
--- a/include/linux/nfs_idmap.h
+++ b/include/linux/nfs_idmap.h
@@ -73,5 +73,7 @@ int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, kgid_t
 int nfs_map_uid_to_name(const struct nfs_server *, kuid_t, char *, size_t);
 int nfs_map_gid_to_group(const struct nfs_server *, kgid_t, char *, size_t);
 
+int nfs_map_string_to_numeric(const char *name, size_t namelen, __u32 *res);
+
 extern unsigned int nfs_idmap_cache_timeout;
 #endif /* NFS_IDMAP_H */
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 6c3e06ee2fb7..3eb072dbce83 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -58,6 +58,9 @@ struct nfs_pageio_ops {
 	size_t	(*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *,
 			   struct nfs_page *);
 	int	(*pg_doio)(struct nfs_pageio_descriptor *);
+	unsigned int	(*pg_get_mirror_count)(struct nfs_pageio_descriptor *,
+				       struct nfs_page *);
+	void	(*pg_cleanup)(struct nfs_pageio_descriptor *);
 };
 
 struct nfs_rw_ops {
@@ -69,18 +72,21 @@ struct nfs_rw_ops {
 			struct inode *);
 	void (*rw_result)(struct rpc_task *, struct nfs_pgio_header *);
 	void (*rw_initiate)(struct nfs_pgio_header *, struct rpc_message *,
+			    const struct nfs_rpc_ops *,
 			    struct rpc_task_setup *, int);
 };
 
-struct nfs_pageio_descriptor {
+struct nfs_pgio_mirror {
 	struct list_head	pg_list;
 	unsigned long		pg_bytes_written;
 	size_t			pg_count;
 	size_t			pg_bsize;
 	unsigned int		pg_base;
-	unsigned char		pg_moreio : 1,
-				pg_recoalesce : 1;
+	unsigned char		pg_recoalesce : 1;
+};
 
+struct nfs_pageio_descriptor {
+	unsigned char		pg_moreio : 1;
 	struct inode		*pg_inode;
 	const struct nfs_pageio_ops *pg_ops;
 	const struct nfs_rw_ops *pg_rw_ops;
@@ -91,8 +97,18 @@ struct nfs_pageio_descriptor {
 	struct pnfs_layout_segment *pg_lseg;
 	struct nfs_direct_req	*pg_dreq;
 	void			*pg_layout_private;
+	unsigned int		pg_bsize;	/* default bsize for mirrors */
+
+	u32			pg_mirror_count;
+	struct nfs_pgio_mirror	*pg_mirrors;
+	struct nfs_pgio_mirror	pg_mirrors_static[1];
+	struct nfs_pgio_mirror	*pg_mirrors_dynamic;
+	u32			pg_mirror_idx;	/* current mirror */
 };
 
+/* arbitrarily selected limit to number of mirrors */
+#define NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX 16
+
 #define NFS_WBACK_BUSY(req)	(test_bit(PG_BUSY,&(req)->wb_flags))
 
 extern	struct nfs_page *nfs_create_request(struct nfs_open_context *ctx,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 467c84efb596..38d96ba935c2 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -285,6 +285,7 @@ struct nfs4_layoutcommit_data {
 	struct nfs_fattr fattr;
 	struct list_head lseg_list;
 	struct rpc_cred *cred;
+	struct inode *inode;
 	struct nfs4_layoutcommit_args args;
 	struct nfs4_layoutcommit_res res;
 };
@@ -293,6 +294,7 @@ struct nfs4_layoutreturn_args {
 	struct nfs4_sequence_args seq_args;
 	struct pnfs_layout_hdr *layout;
 	struct inode *inode;
+	struct pnfs_layout_range range;
 	nfs4_stateid stateid;
 	__u32   layout_type;
 };
@@ -308,6 +310,7 @@ struct nfs4_layoutreturn {
 	struct nfs4_layoutreturn_res res;
 	struct rpc_cred *cred;
 	struct nfs_client *clp;
+	struct inode *inode;
 	int rpc_status;
 };
 
@@ -325,6 +328,7 @@ struct nfs_openargs {
 	struct nfs_seqid *	seqid;
 	int			open_flags;
 	fmode_t			fmode;
+	u32			share_access;
 	u32			access;
 	__u64                   clientid;
 	struct stateowner_id	id;
@@ -389,9 +393,10 @@ struct nfs_open_confirmres {
 struct nfs_closeargs {
 	struct nfs4_sequence_args	seq_args;
 	struct nfs_fh *         fh;
-	nfs4_stateid *		stateid;
+	nfs4_stateid 		stateid;
 	struct nfs_seqid *	seqid;
 	fmode_t			fmode;
+	u32			share_access;
 	const u32 *		bitmask;
 };
 
@@ -416,12 +421,13 @@ struct nfs_lock_args {
 	struct nfs_fh *		fh;
 	struct file_lock *	fl;
 	struct nfs_seqid *	lock_seqid;
-	nfs4_stateid *		lock_stateid;
+	nfs4_stateid		lock_stateid;
 	struct nfs_seqid *	open_seqid;
-	nfs4_stateid *		open_stateid;
+	nfs4_stateid		open_stateid;
 	struct nfs_lowner	lock_owner;
 	unsigned char		block : 1;
 	unsigned char		reclaim : 1;
+	unsigned char		new_lock : 1;
 	unsigned char		new_lock_owner : 1;
 };
 
@@ -437,7 +443,7 @@ struct nfs_locku_args {
 	struct nfs_fh *		fh;
 	struct file_lock *	fl;
 	struct nfs_seqid *	seqid;
-	nfs4_stateid *		stateid;
+	nfs4_stateid 		stateid;
 };
 
 struct nfs_locku_res {
@@ -513,6 +519,7 @@ struct nfs_pgio_res {
 	struct nfs4_sequence_res	seq_res;
 	struct nfs_fattr *	fattr;
 	__u32			count;
+	__u32			op_status;
 	int			eof;		/* used by read */
 	struct nfs_writeverf *	verf;		/* used by write */
 	const struct nfs_server *server;	/* used by write */
@@ -532,6 +539,7 @@ struct nfs_commitargs {
 
 struct nfs_commitres {
 	struct nfs4_sequence_res	seq_res;
+	__u32			op_status;
 	struct nfs_fattr	*fattr;
 	struct nfs_writeverf	*verf;
 	const struct nfs_server *server;
@@ -1325,7 +1333,8 @@ struct nfs_pgio_header {
 	__u64			mds_offset;	/* Filelayout dense stripe */
 	struct nfs_page_array	page_array;
 	struct nfs_client	*ds_clp;	/* pNFS data server */
-	int			ds_idx;		/* ds index if ds_clp is set */
+	int			ds_commit_idx;	/* ds index if ds_clp is set */
+	int			pgio_mirror_idx;/* mirror index in pgio layer */
 };
 
 struct nfs_mds_commit_info {
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index d86acc63b25f..598ba80ec30c 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -57,7 +57,7 @@ struct rpc_clnt {
 	const struct rpc_timeout *cl_timeout;	/* Timeout strategy */
 
 	int			cl_nodelen;	/* nodename length */
-	char 			cl_nodename[UNX_MAXNODENAME];
+	char 			cl_nodename[UNX_MAXNODENAME+1];
 	struct rpc_pipe_dir_head cl_pipedir_objects;
 	struct rpc_clnt *	cl_parent;	/* Points to parent of clones */
 	struct rpc_rtt		cl_rtt_default;
@@ -112,6 +112,7 @@ struct rpc_create_args {
 	struct sockaddr		*saddress;
 	const struct rpc_timeout *timeout;
 	const char		*servername;
+	const char		*nodename;
 	const struct rpc_program *program;
 	u32			prognumber;	/* overrides program->number */
 	u32			version;
diff --git a/include/linux/sunrpc/metrics.h b/include/linux/sunrpc/metrics.h
index eecb5a71e6c0..7e61a17030a4 100644
--- a/include/linux/sunrpc/metrics.h
+++ b/include/linux/sunrpc/metrics.h
@@ -79,6 +79,8 @@ struct rpc_clnt;
 struct rpc_iostats *	rpc_alloc_iostats(struct rpc_clnt *);
 void			rpc_count_iostats(const struct rpc_task *,
 					  struct rpc_iostats *);
+void			rpc_count_iostats_metrics(const struct rpc_task *,
+					  struct rpc_iostats *);
 void			rpc_print_iostats(struct seq_file *, struct rpc_clnt *);
 void			rpc_free_iostats(struct rpc_iostats *);
 
@@ -87,6 +89,8 @@ void			rpc_free_iostats(struct rpc_iostats *);
 static inline struct rpc_iostats *rpc_alloc_iostats(struct rpc_clnt *clnt) { return NULL; }
 static inline void rpc_count_iostats(const struct rpc_task *task,
 				     struct rpc_iostats *stats) {}
+static inline void rpc_count_iostats_metrics(const struct rpc_task *,
+					     struct rpc_iostats *) {}
 static inline void rpc_print_iostats(struct seq_file *seq, struct rpc_clnt *clnt) {}
 static inline void rpc_free_iostats(struct rpc_iostats *stats) {}
 
diff --git a/include/linux/sunrpc/rpc_rdma.h b/include/linux/sunrpc/rpc_rdma.h
index b78f16b1dea3..f33c5a4d6fe4 100644
--- a/include/linux/sunrpc/rpc_rdma.h
+++ b/include/linux/sunrpc/rpc_rdma.h
@@ -42,6 +42,9 @@
 
 #include <linux/types.h>
 
+#define RPCRDMA_VERSION		1
+#define rpcrdma_version		cpu_to_be32(RPCRDMA_VERSION)
+
 struct rpcrdma_segment {
 	__be32 rs_handle;	/* Registered memory handle */
 	__be32 rs_length;	/* Length of the chunk in bytes */
@@ -95,7 +98,10 @@ struct rpcrdma_msg {
 	} rm_body;
 };
 
-#define RPCRDMA_HDRLEN_MIN	28
+/*
+ * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
+ */
+#define RPCRDMA_HDRLEN_MIN	(sizeof(__be32) * 7)
 
 enum rpcrdma_errcode {
 	ERR_VERS = 1,
@@ -115,4 +121,10 @@ enum rpcrdma_proc {
 	RDMA_ERROR = 4		/* An RPC RDMA encoding error */
 };
 
+#define rdma_msg	cpu_to_be32(RDMA_MSG)
+#define rdma_nomsg	cpu_to_be32(RDMA_NOMSG)
+#define rdma_msgp	cpu_to_be32(RDMA_MSGP)
+#define rdma_done	cpu_to_be32(RDMA_DONE)
+#define rdma_error	cpu_to_be32(RDMA_ERROR)
+
 #endif				/* _LINUX_SUNRPC_RPC_RDMA_H */
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 975da754c778..ddfe88f52219 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -63,8 +63,6 @@ extern atomic_t rdma_stat_rq_prod;
 extern atomic_t rdma_stat_sq_poll;
 extern atomic_t rdma_stat_sq_prod;
 
-#define RPCRDMA_VERSION 1
-
 /*
  * Contexts are built when an RDMA request is created and are a
  * record of the resources that can be recovered when the request
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 9d27ac45b909..8b93ef53df3c 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -347,6 +347,9 @@ void			xprt_force_disconnect(struct rpc_xprt *xprt);
 void			xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie);
 int			xs_swapper(struct rpc_xprt *xprt, int enable);
 
+bool			xprt_lock_connect(struct rpc_xprt *, struct rpc_task *, void *);
+void			xprt_unlock_connect(struct rpc_xprt *, void *);
+
 /*
  * Reserved bit positions in xprt->state
  */
@@ -357,10 +360,7 @@ int			xs_swapper(struct rpc_xprt *xprt, int enable);
 #define XPRT_BOUND		(4)
 #define XPRT_BINDING		(5)
 #define XPRT_CLOSING		(6)
-#define XPRT_CONNECTION_ABORT	(7)
-#define XPRT_CONNECTION_CLOSE	(8)
 #define XPRT_CONGESTED		(9)
-#define XPRT_CONNECTION_REUSE	(10)
 
 static inline void xprt_set_connected(struct rpc_xprt *xprt)
 {