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authorLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 23:16:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 23:16:21 +0300
commit01cde1538e1dff4254e340f606177a870131a01f (patch)
tree474c049c444e885ff83e808c36a94cceab5bf8a3 /include
parent243d50678583100855862bc084b8b307eea67f68 (diff)
parentf35592a97460f57d1089fd674176e9f34ba311f2 (diff)
downloadlinux-01cde1538e1dff4254e340f606177a870131a01f.tar.xz
Merge tag 'nfs-for-4.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust: "Highlights include: Features: - Add support for multiple NFSv4.1 callbacks in flight - Initial patchset for RPC multipath support - Adapt RPC/RDMA to use the new completion queue API Bugfixes and cleanups: - nfs4: nfs4_ff_layout_prepare_ds should return NULL if connection failed - Cleanups to remove nfs_inode_dio_wait and nfs4_file_fsync - Fix RPC/RDMA credit accounting - Properly handle RDMA_ERROR replies - xprtrdma: Do not wait if ib_post_send() fails - xprtrdma: Segment head and tail XDR buffers on page boundaries - xprtrdma cleanups for dprintk, physical_op_map and unused macros" * tag 'nfs-for-4.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (35 commits) nfs/blocklayout: make sure making a aligned read request nfs4: nfs4_ff_layout_prepare_ds should return NULL if connection failed nfs: remove nfs_inode_dio_wait nfs: remove nfs4_file_fsync xprtrdma: Use new CQ API for RPC-over-RDMA client send CQs xprtrdma: Use an anonymous union in struct rpcrdma_mw xprtrdma: Use new CQ API for RPC-over-RDMA client receive CQs xprtrdma: Serialize credit accounting again xprtrdma: Properly handle RDMA_ERROR replies rpcrdma: Add RPCRDMA_HDRLEN_ERR xprtrdma: Do not wait if ib_post_send() fails xprtrdma: Segment head and tail XDR buffers on page boundaries xprtrdma: Clean up dprintk format string containing a newline xprtrdma: Clean up physical_op_map() xprtrdma: Clean up unused RPCRDMA_INLINE_PAD_THRESH macro NFS add callback_ops to nfs4_proc_bind_conn_to_session_callback pnfs/NFSv4.1: Add multipath capabilities to pNFS flexfiles servers over NFSv3 SUNRPC: Allow addition of new transports to a struct rpc_clnt NFSv4.1: nfs4_proc_bind_conn_to_session must iterate over all connections SUNRPC: Make NFS swap work with multipath ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/sunrpc/clnt.h18
-rw-r--r--include/linux/sunrpc/rpc_rdma.h12
-rw-r--r--include/linux/sunrpc/sched.h32
-rw-r--r--include/linux/sunrpc/xprt.h22
-rw-r--r--include/linux/sunrpc/xprtmultipath.h69
-rw-r--r--include/linux/sunrpc/xprtrdma.h2
6 files changed, 120 insertions, 35 deletions
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 131032f15cc1..9a7ddbaf116e 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -25,6 +25,7 @@
#include <asm/signal.h>
#include <linux/path.h>
#include <net/ipv6.h>
+#include <linux/sunrpc/xprtmultipath.h>
struct rpc_inode;
@@ -67,6 +68,7 @@ struct rpc_clnt {
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
struct dentry *cl_debugfs; /* debugfs directory */
#endif
+ struct rpc_xprt_iter cl_xpi;
};
/*
@@ -139,7 +141,6 @@ struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args,
struct rpc_xprt *xprt);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
const struct rpc_program *, u32);
-void rpc_task_reset_client(struct rpc_task *task, struct rpc_clnt *clnt);
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
struct rpc_clnt *rpc_clone_client_set_auth(struct rpc_clnt *,
rpc_authflavor_t);
@@ -181,6 +182,21 @@ size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);
int rpc_localaddr(struct rpc_clnt *, struct sockaddr *, size_t);
+int rpc_clnt_iterate_for_each_xprt(struct rpc_clnt *clnt,
+ int (*fn)(struct rpc_clnt *, struct rpc_xprt *, void *),
+ void *data);
+
+int rpc_clnt_test_and_add_xprt(struct rpc_clnt *clnt,
+ struct rpc_xprt_switch *xps,
+ struct rpc_xprt *xprt,
+ void *dummy);
+int rpc_clnt_add_xprt(struct rpc_clnt *, struct xprt_create *,
+ int (*setup)(struct rpc_clnt *,
+ struct rpc_xprt_switch *,
+ struct rpc_xprt *,
+ void *),
+ void *data);
+
const char *rpc_proc_name(const struct rpc_task *task);
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_CLNT_H */
diff --git a/include/linux/sunrpc/rpc_rdma.h b/include/linux/sunrpc/rpc_rdma.h
index f33c5a4d6fe4..3b1ff38f0c37 100644
--- a/include/linux/sunrpc/rpc_rdma.h
+++ b/include/linux/sunrpc/rpc_rdma.h
@@ -93,6 +93,12 @@ struct rpcrdma_msg {
__be32 rm_pempty[3]; /* 3 empty chunk lists */
} rm_padded;
+ struct {
+ __be32 rm_err;
+ __be32 rm_vers_low;
+ __be32 rm_vers_high;
+ } rm_error;
+
__be32 rm_chunks[0]; /* read, write and reply chunks */
} rm_body;
@@ -102,17 +108,13 @@ struct rpcrdma_msg {
* Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
*/
#define RPCRDMA_HDRLEN_MIN (sizeof(__be32) * 7)
+#define RPCRDMA_HDRLEN_ERR (sizeof(__be32) * 5)
enum rpcrdma_errcode {
ERR_VERS = 1,
ERR_CHUNK = 2
};
-struct rpcrdma_err_vers {
- uint32_t rdma_vers_low; /* Version range supported by peer */
- uint32_t rdma_vers_high;
-};
-
enum rpcrdma_proc {
RDMA_MSG = 0, /* An RPC call or reply msg */
RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index d703f0ef37d8..05a1809c44d9 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -42,40 +42,43 @@ struct rpc_wait {
*/
struct rpc_task {
atomic_t tk_count; /* Reference count */
+ int tk_status; /* result of last operation */
struct list_head tk_task; /* global list of tasks */
- struct rpc_clnt * tk_client; /* RPC client */
- struct rpc_rqst * tk_rqstp; /* RPC request */
-
- /*
- * RPC call state
- */
- struct rpc_message tk_msg; /* RPC call info */
/*
* callback to be executed after waking up
* action next procedure for async tasks
- * tk_ops caller callbacks
*/
void (*tk_callback)(struct rpc_task *);
void (*tk_action)(struct rpc_task *);
- const struct rpc_call_ops *tk_ops;
- void * tk_calldata;
unsigned long tk_timeout; /* timeout for rpc_sleep() */
unsigned long tk_runstate; /* Task run status */
- struct workqueue_struct *tk_workqueue; /* Normally rpciod, but could
- * be any workqueue
- */
+
struct rpc_wait_queue *tk_waitqueue; /* RPC wait queue we're on */
union {
struct work_struct tk_work; /* Async task work queue */
struct rpc_wait tk_wait; /* RPC wait */
} u;
+ /*
+ * RPC call state
+ */
+ struct rpc_message tk_msg; /* RPC call info */
+ void * tk_calldata; /* Caller private data */
+ const struct rpc_call_ops *tk_ops; /* Caller callbacks */
+
+ struct rpc_clnt * tk_client; /* RPC client */
+ struct rpc_xprt * tk_xprt; /* Transport */
+
+ struct rpc_rqst * tk_rqstp; /* RPC request */
+
+ struct workqueue_struct *tk_workqueue; /* Normally rpciod, but could
+ * be any workqueue
+ */
ktime_t tk_start; /* RPC task init timestamp */
pid_t tk_owner; /* Process id for batching tasks */
- int tk_status; /* result of last operation */
unsigned short tk_flags; /* misc flags */
unsigned short tk_timeouts; /* maj timeouts */
@@ -100,6 +103,7 @@ struct rpc_call_ops {
struct rpc_task_setup {
struct rpc_task *task;
struct rpc_clnt *rpc_client;
+ struct rpc_xprt *rpc_xprt;
const struct rpc_message *rpc_message;
const struct rpc_call_ops *callback_ops;
void *callback_data;
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 69ef5b3ab038..fb0d212e0d3a 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -13,6 +13,7 @@
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/ktime.h>
+#include <linux/kref.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/msg_prot.h>
@@ -166,7 +167,7 @@ enum xprt_transports {
};
struct rpc_xprt {
- atomic_t count; /* Reference count */
+ struct kref kref; /* Reference count */
struct rpc_xprt_ops * ops; /* transport methods */
const struct rpc_timeout *timeout; /* timeout parms */
@@ -197,6 +198,11 @@ struct rpc_xprt {
unsigned int bind_index; /* bind function index */
/*
+ * Multipath
+ */
+ struct list_head xprt_switch;
+
+ /*
* Connection of transports
*/
unsigned long bind_timeout,
@@ -256,6 +262,7 @@ struct rpc_xprt {
struct dentry *debugfs; /* debugfs directory */
atomic_t inject_disconnect;
#endif
+ struct rcu_head rcu;
};
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
@@ -318,24 +325,13 @@ int xprt_adjust_timeout(struct rpc_rqst *req);
void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_release(struct rpc_task *task);
+struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
void xprt_put(struct rpc_xprt *xprt);
struct rpc_xprt * xprt_alloc(struct net *net, size_t size,
unsigned int num_prealloc,
unsigned int max_req);
void xprt_free(struct rpc_xprt *);
-/**
- * xprt_get - return a reference to an RPC transport.
- * @xprt: pointer to the transport
- *
- */
-static inline struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
-{
- if (atomic_inc_not_zero(&xprt->count))
- return xprt;
- return NULL;
-}
-
static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)
{
return p + xprt->tsh_size;
diff --git a/include/linux/sunrpc/xprtmultipath.h b/include/linux/sunrpc/xprtmultipath.h
new file mode 100644
index 000000000000..5a9acffa41be
--- /dev/null
+++ b/include/linux/sunrpc/xprtmultipath.h
@@ -0,0 +1,69 @@
+/*
+ * RPC client multipathing definitions
+ *
+ * Copyright (c) 2015, 2016, Primary Data, Inc. All rights reserved.
+ *
+ * Trond Myklebust <trond.myklebust@primarydata.com>
+ */
+#ifndef _NET_SUNRPC_XPRTMULTIPATH_H
+#define _NET_SUNRPC_XPRTMULTIPATH_H
+
+struct rpc_xprt_iter_ops;
+struct rpc_xprt_switch {
+ spinlock_t xps_lock;
+ struct kref xps_kref;
+
+ unsigned int xps_nxprts;
+ struct list_head xps_xprt_list;
+
+ struct net * xps_net;
+
+ const struct rpc_xprt_iter_ops *xps_iter_ops;
+
+ struct rcu_head xps_rcu;
+};
+
+struct rpc_xprt_iter {
+ struct rpc_xprt_switch __rcu *xpi_xpswitch;
+ struct rpc_xprt * xpi_cursor;
+
+ const struct rpc_xprt_iter_ops *xpi_ops;
+};
+
+
+struct rpc_xprt_iter_ops {
+ void (*xpi_rewind)(struct rpc_xprt_iter *);
+ struct rpc_xprt *(*xpi_xprt)(struct rpc_xprt_iter *);
+ struct rpc_xprt *(*xpi_next)(struct rpc_xprt_iter *);
+};
+
+extern struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
+ gfp_t gfp_flags);
+
+extern struct rpc_xprt_switch *xprt_switch_get(struct rpc_xprt_switch *xps);
+extern void xprt_switch_put(struct rpc_xprt_switch *xps);
+
+extern void rpc_xprt_switch_set_roundrobin(struct rpc_xprt_switch *xps);
+
+extern void rpc_xprt_switch_add_xprt(struct rpc_xprt_switch *xps,
+ struct rpc_xprt *xprt);
+extern void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
+ struct rpc_xprt *xprt);
+
+extern void xprt_iter_init(struct rpc_xprt_iter *xpi,
+ struct rpc_xprt_switch *xps);
+
+extern void xprt_iter_init_listall(struct rpc_xprt_iter *xpi,
+ struct rpc_xprt_switch *xps);
+
+extern void xprt_iter_destroy(struct rpc_xprt_iter *xpi);
+
+extern struct rpc_xprt_switch *xprt_iter_xchg_switch(
+ struct rpc_xprt_iter *xpi,
+ struct rpc_xprt_switch *newswitch);
+
+extern struct rpc_xprt *xprt_iter_xprt(struct rpc_xprt_iter *xpi);
+extern struct rpc_xprt *xprt_iter_get_xprt(struct rpc_xprt_iter *xpi);
+extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
+
+#endif
diff --git a/include/linux/sunrpc/xprtrdma.h b/include/linux/sunrpc/xprtrdma.h
index b7b279b54504..767190b01363 100644
--- a/include/linux/sunrpc/xprtrdma.h
+++ b/include/linux/sunrpc/xprtrdma.h
@@ -54,8 +54,6 @@
#define RPCRDMA_DEF_INLINE (1024) /* default inline max */
-#define RPCRDMA_INLINE_PAD_THRESH (512)/* payload threshold to pad (bytes) */
-
/* Memory registration strategies, by number.
* This is part of a kernel / user space API. Do not remove. */
enum rpcrdma_memreg {