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authorRicardo Labiaga <Ricardo.Labiaga@netapp.com>2009-04-01 09:23:04 -0400
committerBenny Halevy <bhalevy@panasas.com>2009-06-17 17:11:28 -0400
commit0d90ba1cd416525c4825c111db862d8b15a02e9b (patch)
tree1f1571410b2d1b17eb8e503fc3b60450f93e9dee /net
parent55ae1aabfb108106dd095de2578ceef1c755a8b8 (diff)
nfs41: Backchannel callback service helper routines
Executes the backchannel task on the RPC state machine using the existing open connection previously established by the client. Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> nfs41: Add bc_svc.o to sunrpc Makefile. [nfs41: bc_send() does not need to be exported outside RPC module] [nfs41: xprt_free_bc_request() need not be exported outside RPC module] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Update copyright] Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/Makefile2
-rw-r--r--net/sunrpc/bc_svc.c81
-rw-r--r--net/sunrpc/xprtsock.c3
3 files changed, 85 insertions, 1 deletions
diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile
index 4a01f9684b85..db73fd2a3f0e 100644
--- a/net/sunrpc/Makefile
+++ b/net/sunrpc/Makefile
@@ -13,6 +13,6 @@ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \
13 rpcb_clnt.o timer.o xdr.o \ 13 rpcb_clnt.o timer.o xdr.o \
14 sunrpc_syms.o cache.o rpc_pipe.o \ 14 sunrpc_syms.o cache.o rpc_pipe.o \
15 svc_xprt.o 15 svc_xprt.o
16sunrpc-$(CONFIG_NFS_V4_1) += backchannel_rqst.o 16sunrpc-$(CONFIG_NFS_V4_1) += backchannel_rqst.o bc_svc.o
17sunrpc-$(CONFIG_PROC_FS) += stats.o 17sunrpc-$(CONFIG_PROC_FS) += stats.o
18sunrpc-$(CONFIG_SYSCTL) += sysctl.o 18sunrpc-$(CONFIG_SYSCTL) += sysctl.o
diff --git a/net/sunrpc/bc_svc.c b/net/sunrpc/bc_svc.c
new file mode 100644
index 000000000000..13f214f53120
--- /dev/null
+++ b/net/sunrpc/bc_svc.c
@@ -0,0 +1,81 @@
1/******************************************************************************
2
3(c) 2007 Network Appliance, Inc. All Rights Reserved.
4(c) 2009 NetApp. All Rights Reserved.
5
6NetApp provides this source code under the GPL v2 License.
7The GPL v2 license is available at
8http://opensource.org/licenses/gpl-license.php.
9
10THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
11"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
12LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
13A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
14CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
15EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
16PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
17PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
18LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
19NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
20SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21
22******************************************************************************/
23
24/*
25 * The NFSv4.1 callback service helper routines.
26 * They implement the transport level processing required to send the
27 * reply over an existing open connection previously established by the client.
28 */
29
30#if defined(CONFIG_NFS_V4_1)
31
32#include <linux/module.h>
33
34#include <linux/sunrpc/xprt.h>
35#include <linux/sunrpc/sched.h>
36#include <linux/sunrpc/bc_xprt.h>
37
38#define RPCDBG_FACILITY RPCDBG_SVCDSP
39
40void bc_release_request(struct rpc_task *task)
41{
42 struct rpc_rqst *req = task->tk_rqstp;
43
44 dprintk("RPC: bc_release_request: task= %p\n", task);
45
46 /*
47 * Release this request only if it's a backchannel
48 * preallocated request
49 */
50 if (!bc_prealloc(req))
51 return;
52 xprt_free_bc_request(req);
53}
54
55/* Empty callback ops */
56static const struct rpc_call_ops nfs41_callback_ops = {
57};
58
59
60/*
61 * Send the callback reply
62 */
63int bc_send(struct rpc_rqst *req)
64{
65 struct rpc_task *task;
66 int ret;
67
68 dprintk("RPC: bc_send req= %p\n", req);
69 task = rpc_run_bc_task(req, &nfs41_callback_ops);
70 if (IS_ERR(task))
71 ret = PTR_ERR(task);
72 else {
73 BUG_ON(atomic_read(&task->tk_count) != 1);
74 ret = task->tk_status;
75 rpc_put_task(task);
76 }
77 return ret;
78 dprintk("RPC: bc_send ret= %d \n", ret);
79}
80
81#endif /* CONFIG_NFS_V4_1 */
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index e3e3a57116fb..8a721867b601 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2183,6 +2183,9 @@ static struct rpc_xprt_ops xs_tcp_ops = {
2183 .buf_free = rpc_free, 2183 .buf_free = rpc_free,
2184 .send_request = xs_tcp_send_request, 2184 .send_request = xs_tcp_send_request,
2185 .set_retrans_timeout = xprt_set_retrans_timeout_def, 2185 .set_retrans_timeout = xprt_set_retrans_timeout_def,
2186#if defined(CONFIG_NFS_V4_1)
2187 .release_request = bc_release_request,
2188#endif /* CONFIG_NFS_V4_1 */
2186 .close = xs_tcp_close, 2189 .close = xs_tcp_close,
2187 .destroy = xs_destroy, 2190 .destroy = xs_destroy,
2188 .print_stats = xs_tcp_print_stats, 2191 .print_stats = xs_tcp_print_stats,