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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-04 22:55:11 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-04 22:55:11 -0400
commit4d4700707c0d4be0efc968989fb1cd01c60c0a35 (patch)
tree478453a4ae9453bd8d26ffc3df6eedcc30799a43 /net
parent7e20ef030dde0e52dd5a57220ee82fa9facbea4e (diff)
parent84dde76c4a2d99ed2d7de6ec82c53b56620900a3 (diff)
Merge git://git.linux-nfs.org/pub/linux/nfs-2.6
* git://git.linux-nfs.org/pub/linux/nfs-2.6: (28 commits) NFS: Fix a compile glitch on 64-bit systems NFS: Clean up nfs_create_request comments spkm3: initialize hash spkm3: remove bad kfree, unnecessary export spkm3: fix spkm3's use of hmac NFS4: invalidate cached acl on setacl NFS: Fix directory caching problem - with test case and patch. NFS: Set meaningful value for fattr->time_start in readdirplus results. NFS: Added support to turn off the NFSv3 READDIRPLUS RPC. SUNRPC: RPC client should retry with different versions of rpcbind SUNRPC: remove old portmapper NFS: switch NFSROOT to use new rpcbind client SUNRPC: switch the RPC server to use the new rpcbind registration API SUNRPC: switch socket-based RPC transports to use rpcbind SUNRPC: introduce rpcbind: replacement for in-kernel portmapper SUNRPC: Eliminate side effects from rpc_malloc SUNRPC: RPC buffer size estimates are too large NLM: Shrink the maximum request size of NLM4 requests NFS: Use pgoff_t in structures and functions that pass page cache offsets NFS: Clean up nfs_sync_mapping_wait() ...
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/Makefile2
-rw-r--r--net/sunrpc/auth_gss/gss_spkm3_seal.c13
-rw-r--r--net/sunrpc/clnt.c69
-rw-r--r--net/sunrpc/pmap_clnt.c383
-rw-r--r--net/sunrpc/rpcb_clnt.c625
-rw-r--r--net/sunrpc/sched.c65
-rw-r--r--net/sunrpc/svc.c2
-rw-r--r--net/sunrpc/xprt.c4
-rw-r--r--net/sunrpc/xprtsock.c4
9 files changed, 714 insertions, 453 deletions
diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile
index cdcab9ca4c60..8ebfc4db7f51 100644
--- a/net/sunrpc/Makefile
+++ b/net/sunrpc/Makefile
@@ -9,7 +9,7 @@ obj-$(CONFIG_SUNRPC_GSS) += auth_gss/
9sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \ 9sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \
10 auth.o auth_null.o auth_unix.o \ 10 auth.o auth_null.o auth_unix.o \
11 svc.o svcsock.o svcauth.o svcauth_unix.o \ 11 svc.o svcsock.o svcauth.o svcauth_unix.o \
12 pmap_clnt.o timer.o xdr.o \ 12 rpcb_clnt.o timer.o xdr.o \
13 sunrpc_syms.o cache.o rpc_pipe.o 13 sunrpc_syms.o cache.o rpc_pipe.o
14sunrpc-$(CONFIG_PROC_FS) += stats.o 14sunrpc-$(CONFIG_PROC_FS) += stats.o
15sunrpc-$(CONFIG_SYSCTL) += sysctl.o 15sunrpc-$(CONFIG_SYSCTL) += sysctl.o
diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c
index 104cbf4f769f..d158635de6c0 100644
--- a/net/sunrpc/auth_gss/gss_spkm3_seal.c
+++ b/net/sunrpc/auth_gss/gss_spkm3_seal.c
@@ -123,9 +123,6 @@ spkm3_make_token(struct spkm3_ctx *ctx,
123 123
124 return GSS_S_COMPLETE; 124 return GSS_S_COMPLETE;
125out_err: 125out_err:
126 if (md5cksum.data)
127 kfree(md5cksum.data);
128
129 token->data = NULL; 126 token->data = NULL;
130 token->len = 0; 127 token->len = 0;
131 return GSS_S_FAILURE; 128 return GSS_S_FAILURE;
@@ -152,7 +149,7 @@ make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
152 149
153 switch (cksumtype) { 150 switch (cksumtype) {
154 case CKSUMTYPE_HMAC_MD5: 151 case CKSUMTYPE_HMAC_MD5:
155 cksumname = "md5"; 152 cksumname = "hmac(md5)";
156 break; 153 break;
157 default: 154 default:
158 dprintk("RPC: spkm3_make_checksum:" 155 dprintk("RPC: spkm3_make_checksum:"
@@ -172,8 +169,12 @@ make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
172 if (err) 169 if (err)
173 goto out; 170 goto out;
174 171
172 err = crypto_hash_init(&desc);
173 if (err)
174 goto out;
175
175 sg_set_buf(sg, header, hdrlen); 176 sg_set_buf(sg, header, hdrlen);
176 crypto_hash_update(&desc, sg, 1); 177 crypto_hash_update(&desc, sg, sg->length);
177 178
178 xdr_process_buf(body, body_offset, body->len - body_offset, 179 xdr_process_buf(body, body_offset, body->len - body_offset,
179 spkm3_checksummer, &desc); 180 spkm3_checksummer, &desc);
@@ -184,5 +185,3 @@ out:
184 185
185 return err ? GSS_S_FAILURE : 0; 186 return err ? GSS_S_FAILURE : 0;
186} 187}
187
188EXPORT_SYMBOL(make_spkm3_checksum);
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 396cdbe249d1..d8fbee40a19c 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -36,8 +36,6 @@
36#include <linux/sunrpc/metrics.h> 36#include <linux/sunrpc/metrics.h>
37 37
38 38
39#define RPC_SLACK_SPACE (1024) /* total overkill */
40
41#ifdef RPC_DEBUG 39#ifdef RPC_DEBUG
42# define RPCDBG_FACILITY RPCDBG_CALL 40# define RPCDBG_FACILITY RPCDBG_CALL
43#endif 41#endif
@@ -747,21 +745,38 @@ call_reserveresult(struct rpc_task *task)
747static void 745static void
748call_allocate(struct rpc_task *task) 746call_allocate(struct rpc_task *task)
749{ 747{
748 unsigned int slack = task->tk_auth->au_cslack;
750 struct rpc_rqst *req = task->tk_rqstp; 749 struct rpc_rqst *req = task->tk_rqstp;
751 struct rpc_xprt *xprt = task->tk_xprt; 750 struct rpc_xprt *xprt = task->tk_xprt;
752 unsigned int bufsiz; 751 struct rpc_procinfo *proc = task->tk_msg.rpc_proc;
753 752
754 dprint_status(task); 753 dprint_status(task);
755 754
755 task->tk_status = 0;
756 task->tk_action = call_bind; 756 task->tk_action = call_bind;
757
757 if (req->rq_buffer) 758 if (req->rq_buffer)
758 return; 759 return;
759 760
760 /* FIXME: compute buffer requirements more exactly using 761 if (proc->p_proc != 0) {
761 * auth->au_wslack */ 762 BUG_ON(proc->p_arglen == 0);
762 bufsiz = task->tk_msg.rpc_proc->p_bufsiz + RPC_SLACK_SPACE; 763 if (proc->p_decode != NULL)
764 BUG_ON(proc->p_replen == 0);
765 }
763 766
764 if (xprt->ops->buf_alloc(task, bufsiz << 1) != NULL) 767 /*
768 * Calculate the size (in quads) of the RPC call
769 * and reply headers, and convert both values
770 * to byte sizes.
771 */
772 req->rq_callsize = RPC_CALLHDRSIZE + (slack << 1) + proc->p_arglen;
773 req->rq_callsize <<= 2;
774 req->rq_rcvsize = RPC_REPHDRSIZE + slack + proc->p_replen;
775 req->rq_rcvsize <<= 2;
776
777 req->rq_buffer = xprt->ops->buf_alloc(task,
778 req->rq_callsize + req->rq_rcvsize);
779 if (req->rq_buffer != NULL)
765 return; 780 return;
766 781
767 dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid); 782 dprintk("RPC: %5u rpc_buffer allocation failed\n", task->tk_pid);
@@ -788,6 +803,17 @@ rpc_task_force_reencode(struct rpc_task *task)
788 task->tk_rqstp->rq_snd_buf.len = 0; 803 task->tk_rqstp->rq_snd_buf.len = 0;
789} 804}
790 805
806static inline void
807rpc_xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
808{
809 buf->head[0].iov_base = start;
810 buf->head[0].iov_len = len;
811 buf->tail[0].iov_len = 0;
812 buf->page_len = 0;
813 buf->len = 0;
814 buf->buflen = len;
815}
816
791/* 817/*
792 * 3. Encode arguments of an RPC call 818 * 3. Encode arguments of an RPC call
793 */ 819 */
@@ -795,28 +821,17 @@ static void
795call_encode(struct rpc_task *task) 821call_encode(struct rpc_task *task)
796{ 822{
797 struct rpc_rqst *req = task->tk_rqstp; 823 struct rpc_rqst *req = task->tk_rqstp;
798 struct xdr_buf *sndbuf = &req->rq_snd_buf;
799 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
800 unsigned int bufsiz;
801 kxdrproc_t encode; 824 kxdrproc_t encode;
802 __be32 *p; 825 __be32 *p;
803 826
804 dprint_status(task); 827 dprint_status(task);
805 828
806 /* Default buffer setup */ 829 rpc_xdr_buf_init(&req->rq_snd_buf,
807 bufsiz = req->rq_bufsize >> 1; 830 req->rq_buffer,
808 sndbuf->head[0].iov_base = (void *)req->rq_buffer; 831 req->rq_callsize);
809 sndbuf->head[0].iov_len = bufsiz; 832 rpc_xdr_buf_init(&req->rq_rcv_buf,
810 sndbuf->tail[0].iov_len = 0; 833 (char *)req->rq_buffer + req->rq_callsize,
811 sndbuf->page_len = 0; 834 req->rq_rcvsize);
812 sndbuf->len = 0;
813 sndbuf->buflen = bufsiz;
814 rcvbuf->head[0].iov_base = (void *)((char *)req->rq_buffer + bufsiz);
815 rcvbuf->head[0].iov_len = bufsiz;
816 rcvbuf->tail[0].iov_len = 0;
817 rcvbuf->page_len = 0;
818 rcvbuf->len = 0;
819 rcvbuf->buflen = bufsiz;
820 835
821 /* Encode header and provided arguments */ 836 /* Encode header and provided arguments */
822 encode = task->tk_msg.rpc_proc->p_encode; 837 encode = task->tk_msg.rpc_proc->p_encode;
@@ -887,9 +902,11 @@ call_bind_status(struct rpc_task *task)
887 task->tk_pid); 902 task->tk_pid);
888 break; 903 break;
889 case -EPROTONOSUPPORT: 904 case -EPROTONOSUPPORT:
890 dprintk("RPC: %5u remote rpcbind version 2 unavailable\n", 905 dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n",
891 task->tk_pid); 906 task->tk_pid);
892 break; 907 task->tk_status = 0;
908 task->tk_action = call_bind;
909 return;
893 default: 910 default:
894 dprintk("RPC: %5u unrecognized rpcbind error (%d)\n", 911 dprintk("RPC: %5u unrecognized rpcbind error (%d)\n",
895 task->tk_pid, -task->tk_status); 912 task->tk_pid, -task->tk_status);
diff --git a/net/sunrpc/pmap_clnt.c b/net/sunrpc/pmap_clnt.c
deleted file mode 100644
index d9f765344589..000000000000
--- a/net/sunrpc/pmap_clnt.c
+++ /dev/null
@@ -1,383 +0,0 @@
1/*
2 * linux/net/sunrpc/pmap_clnt.c
3 *
4 * In-kernel RPC portmapper client.
5 *
6 * Portmapper supports version 2 of the rpcbind protocol (RFC 1833).
7 *
8 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
9 */
10
11#include <linux/types.h>
12#include <linux/socket.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/uio.h>
16#include <linux/in.h>
17#include <linux/sunrpc/clnt.h>
18#include <linux/sunrpc/sched.h>
19
20#ifdef RPC_DEBUG
21# define RPCDBG_FACILITY RPCDBG_PMAP
22#endif
23
24#define PMAP_SET 1
25#define PMAP_UNSET 2
26#define PMAP_GETPORT 3
27
28struct portmap_args {
29 u32 pm_prog;
30 u32 pm_vers;
31 u32 pm_prot;
32 unsigned short pm_port;
33 struct rpc_xprt * pm_xprt;
34};
35
36static struct rpc_procinfo pmap_procedures[];
37static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int, int);
38static void pmap_getport_done(struct rpc_task *, void *);
39static struct rpc_program pmap_program;
40
41static void pmap_getport_prepare(struct rpc_task *task, void *calldata)
42{
43 struct portmap_args *map = calldata;
44 struct rpc_message msg = {
45 .rpc_proc = &pmap_procedures[PMAP_GETPORT],
46 .rpc_argp = map,
47 .rpc_resp = &map->pm_port,
48 };
49
50 rpc_call_setup(task, &msg, 0);
51}
52
53static inline struct portmap_args *pmap_map_alloc(void)
54{
55 return kmalloc(sizeof(struct portmap_args), GFP_NOFS);
56}
57
58static inline void pmap_map_free(struct portmap_args *map)
59{
60 kfree(map);
61}
62
63static void pmap_map_release(void *data)
64{
65 struct portmap_args *map = data;
66
67 xprt_put(map->pm_xprt);
68 pmap_map_free(map);
69}
70
71static const struct rpc_call_ops pmap_getport_ops = {
72 .rpc_call_prepare = pmap_getport_prepare,
73 .rpc_call_done = pmap_getport_done,
74 .rpc_release = pmap_map_release,
75};
76
77static inline void pmap_wake_portmap_waiters(struct rpc_xprt *xprt, int status)
78{
79 xprt_clear_binding(xprt);
80 rpc_wake_up_status(&xprt->binding, status);
81}
82
83/**
84 * rpc_getport - obtain the port for a given RPC service on a given host
85 * @task: task that is waiting for portmapper request
86 *
87 * This one can be called for an ongoing RPC request, and can be used in
88 * an async (rpciod) context.
89 */
90void rpc_getport(struct rpc_task *task)
91{
92 struct rpc_clnt *clnt = task->tk_client;
93 struct rpc_xprt *xprt = task->tk_xprt;
94 struct sockaddr_in addr;
95 struct portmap_args *map;
96 struct rpc_clnt *pmap_clnt;
97 struct rpc_task *child;
98 int status;
99
100 dprintk("RPC: %5u rpc_getport(%s, %u, %u, %d)\n",
101 task->tk_pid, clnt->cl_server,
102 clnt->cl_prog, clnt->cl_vers, xprt->prot);
103
104 /* Autobind on cloned rpc clients is discouraged */
105 BUG_ON(clnt->cl_parent != clnt);
106
107 status = -EACCES; /* tell caller to check again */
108 if (xprt_test_and_set_binding(xprt))
109 goto bailout_nowake;
110
111 /* Put self on queue before sending rpcbind request, in case
112 * pmap_getport_done completes before we return from rpc_run_task */
113 rpc_sleep_on(&xprt->binding, task, NULL, NULL);
114
115 /* Someone else may have bound if we slept */
116 status = 0;
117 if (xprt_bound(xprt))
118 goto bailout_nofree;
119
120 status = -ENOMEM;
121 map = pmap_map_alloc();
122 if (!map)
123 goto bailout_nofree;
124 map->pm_prog = clnt->cl_prog;
125 map->pm_vers = clnt->cl_vers;
126 map->pm_prot = xprt->prot;
127 map->pm_port = 0;
128 map->pm_xprt = xprt_get(xprt);
129
130 rpc_peeraddr(clnt, (struct sockaddr *) &addr, sizeof(addr));
131 pmap_clnt = pmap_create(clnt->cl_server, &addr, map->pm_prot, 0);
132 status = PTR_ERR(pmap_clnt);
133 if (IS_ERR(pmap_clnt))
134 goto bailout;
135
136 status = -EIO;
137 child = rpc_run_task(pmap_clnt, RPC_TASK_ASYNC, &pmap_getport_ops, map);
138 if (IS_ERR(child))
139 goto bailout_nofree;
140 rpc_put_task(child);
141
142 task->tk_xprt->stat.bind_count++;
143 return;
144
145bailout:
146 pmap_map_free(map);
147 xprt_put(xprt);
148bailout_nofree:
149 pmap_wake_portmap_waiters(xprt, status);
150bailout_nowake:
151 task->tk_status = status;
152}
153
154#ifdef CONFIG_ROOT_NFS
155/**
156 * rpc_getport_external - obtain the port for a given RPC service on a given host
157 * @sin: address of remote peer
158 * @prog: RPC program number to bind
159 * @vers: RPC version number to bind
160 * @prot: transport protocol to use to make this request
161 *
162 * This one is called from outside the RPC client in a synchronous task context.
163 */
164int rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
165{
166 struct portmap_args map = {
167 .pm_prog = prog,
168 .pm_vers = vers,
169 .pm_prot = prot,
170 .pm_port = 0
171 };
172 struct rpc_message msg = {
173 .rpc_proc = &pmap_procedures[PMAP_GETPORT],
174 .rpc_argp = &map,
175 .rpc_resp = &map.pm_port,
176 };
177 struct rpc_clnt *pmap_clnt;
178 char hostname[32];
179 int status;
180
181 dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
182 NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
183
184 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
185 pmap_clnt = pmap_create(hostname, sin, prot, 0);
186 if (IS_ERR(pmap_clnt))
187 return PTR_ERR(pmap_clnt);
188
189 /* Setup the call info struct */
190 status = rpc_call_sync(pmap_clnt, &msg, 0);
191
192 if (status >= 0) {
193 if (map.pm_port != 0)
194 return map.pm_port;
195 status = -EACCES;
196 }
197 return status;
198}
199#endif
200
201/*
202 * Portmapper child task invokes this callback via tk_exit.
203 */
204static void pmap_getport_done(struct rpc_task *child, void *data)
205{
206 struct portmap_args *map = data;
207 struct rpc_xprt *xprt = map->pm_xprt;
208 int status = child->tk_status;
209
210 if (status < 0) {
211 /* Portmapper not available */
212 xprt->ops->set_port(xprt, 0);
213 } else if (map->pm_port == 0) {
214 /* Requested RPC service wasn't registered */
215 xprt->ops->set_port(xprt, 0);
216 status = -EACCES;
217 } else {
218 /* Succeeded */
219 xprt->ops->set_port(xprt, map->pm_port);
220 xprt_set_bound(xprt);
221 status = 0;
222 }
223
224 dprintk("RPC: %5u pmap_getport_done(status %d, port %u)\n",
225 child->tk_pid, status, map->pm_port);
226
227 pmap_wake_portmap_waiters(xprt, status);
228}
229
230/**
231 * rpc_register - set or unset a port registration with the local portmapper
232 * @prog: RPC program number to bind
233 * @vers: RPC version number to bind
234 * @prot: transport protocol to use to make this request
235 * @port: port value to register
236 * @okay: result code
237 *
238 * port == 0 means unregister, port != 0 means register.
239 */
240int rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
241{
242 struct sockaddr_in sin = {
243 .sin_family = AF_INET,
244 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
245 };
246 struct portmap_args map = {
247 .pm_prog = prog,
248 .pm_vers = vers,
249 .pm_prot = prot,
250 .pm_port = port,
251 };
252 struct rpc_message msg = {
253 .rpc_proc = &pmap_procedures[port ? PMAP_SET : PMAP_UNSET],
254 .rpc_argp = &map,
255 .rpc_resp = okay,
256 };
257 struct rpc_clnt *pmap_clnt;
258 int error = 0;
259
260 dprintk("RPC: registering (%u, %u, %d, %u) with portmapper.\n",
261 prog, vers, prot, port);
262
263 pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
264 if (IS_ERR(pmap_clnt)) {
265 error = PTR_ERR(pmap_clnt);
266 dprintk("RPC: couldn't create pmap client. Error = %d\n",
267 error);
268 return error;
269 }
270
271 error = rpc_call_sync(pmap_clnt, &msg, 0);
272
273 if (error < 0) {
274 printk(KERN_WARNING
275 "RPC: failed to contact portmap (errno %d).\n",
276 error);
277 }
278 dprintk("RPC: registration status %d/%d\n", error, *okay);
279
280 /* Client deleted automatically because cl_oneshot == 1 */
281 return error;
282}
283
284static struct rpc_clnt *pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
285{
286 struct rpc_create_args args = {
287 .protocol = proto,
288 .address = (struct sockaddr *)srvaddr,
289 .addrsize = sizeof(*srvaddr),
290 .servername = hostname,
291 .program = &pmap_program,
292 .version = RPC_PMAP_VERSION,
293 .authflavor = RPC_AUTH_UNIX,
294 .flags = (RPC_CLNT_CREATE_ONESHOT |
295 RPC_CLNT_CREATE_NOPING),
296 };
297
298 srvaddr->sin_port = htons(RPC_PMAP_PORT);
299 if (!privileged)
300 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
301 return rpc_create(&args);
302}
303
304/*
305 * XDR encode/decode functions for PMAP
306 */
307static int xdr_encode_mapping(struct rpc_rqst *req, __be32 *p, struct portmap_args *map)
308{
309 dprintk("RPC: xdr_encode_mapping(%u, %u, %u, %u)\n",
310 map->pm_prog, map->pm_vers,
311 map->pm_prot, map->pm_port);
312 *p++ = htonl(map->pm_prog);
313 *p++ = htonl(map->pm_vers);
314 *p++ = htonl(map->pm_prot);
315 *p++ = htonl(map->pm_port);
316
317 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
318 return 0;
319}
320
321static int xdr_decode_port(struct rpc_rqst *req, __be32 *p, unsigned short *portp)
322{
323 *portp = (unsigned short) ntohl(*p++);
324 return 0;
325}
326
327static int xdr_decode_bool(struct rpc_rqst *req, __be32 *p, unsigned int *boolp)
328{
329 *boolp = (unsigned int) ntohl(*p++);
330 return 0;
331}
332
333static struct rpc_procinfo pmap_procedures[] = {
334[PMAP_SET] = {
335 .p_proc = PMAP_SET,
336 .p_encode = (kxdrproc_t) xdr_encode_mapping,
337 .p_decode = (kxdrproc_t) xdr_decode_bool,
338 .p_bufsiz = 4,
339 .p_count = 1,
340 .p_statidx = PMAP_SET,
341 .p_name = "SET",
342 },
343[PMAP_UNSET] = {
344 .p_proc = PMAP_UNSET,
345 .p_encode = (kxdrproc_t) xdr_encode_mapping,
346 .p_decode = (kxdrproc_t) xdr_decode_bool,
347 .p_bufsiz = 4,
348 .p_count = 1,
349 .p_statidx = PMAP_UNSET,
350 .p_name = "UNSET",
351 },
352[PMAP_GETPORT] = {
353 .p_proc = PMAP_GETPORT,
354 .p_encode = (kxdrproc_t) xdr_encode_mapping,
355 .p_decode = (kxdrproc_t) xdr_decode_port,
356 .p_bufsiz = 4,
357 .p_count = 1,
358 .p_statidx = PMAP_GETPORT,
359 .p_name = "GETPORT",
360 },
361};
362
363static struct rpc_version pmap_version2 = {
364 .number = 2,
365 .nrprocs = 4,
366 .procs = pmap_procedures
367};
368
369static struct rpc_version * pmap_version[] = {
370 NULL,
371 NULL,
372 &pmap_version2
373};
374
375static struct rpc_stat pmap_stats;
376
377static struct rpc_program pmap_program = {
378 .name = "portmap",
379 .number = RPC_PMAP_PROGRAM,
380 .nrvers = ARRAY_SIZE(pmap_version),
381 .version = pmap_version,
382 .stats = &pmap_stats,
383};
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
new file mode 100644
index 000000000000..6c7aa8a1f0c6
--- /dev/null
+++ b/net/sunrpc/rpcb_clnt.c
@@ -0,0 +1,625 @@
1/*
2 * In-kernel rpcbind client supporting versions 2, 3, and 4 of the rpcbind
3 * protocol
4 *
5 * Based on RFC 1833: "Binding Protocols for ONC RPC Version 2" and
6 * RFC 3530: "Network File System (NFS) version 4 Protocol"
7 *
8 * Original: Gilles Quillard, Bull Open Source, 2005 <gilles.quillard@bull.net>
9 * Updated: Chuck Lever, Oracle Corporation, 2007 <chuck.lever@oracle.com>
10 *
11 * Descended from net/sunrpc/pmap_clnt.c,
12 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
13 */
14
15#include <linux/types.h>
16#include <linux/socket.h>
17#include <linux/kernel.h>
18#include <linux/errno.h>
19
20#include <linux/sunrpc/clnt.h>
21#include <linux/sunrpc/sched.h>
22
23#ifdef RPC_DEBUG
24# define RPCDBG_FACILITY RPCDBG_BIND
25#endif
26
27#define RPCBIND_PROGRAM (100000u)
28#define RPCBIND_PORT (111u)
29
30enum {
31 RPCBPROC_NULL,
32 RPCBPROC_SET,
33 RPCBPROC_UNSET,
34 RPCBPROC_GETPORT,
35 RPCBPROC_GETADDR = 3, /* alias for GETPORT */
36 RPCBPROC_DUMP,
37 RPCBPROC_CALLIT,
38 RPCBPROC_BCAST = 5, /* alias for CALLIT */
39 RPCBPROC_GETTIME,
40 RPCBPROC_UADDR2TADDR,
41 RPCBPROC_TADDR2UADDR,
42 RPCBPROC_GETVERSADDR,
43 RPCBPROC_INDIRECT,
44 RPCBPROC_GETADDRLIST,
45 RPCBPROC_GETSTAT,
46};
47
48#define RPCB_HIGHPROC_2 RPCBPROC_CALLIT
49#define RPCB_HIGHPROC_3 RPCBPROC_TADDR2UADDR
50#define RPCB_HIGHPROC_4 RPCBPROC_GETSTAT
51
52/*
53 * r_addr
54 *
55 * Quoting RFC 3530, section 2.2:
56 *
57 * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
58 * US-ASCII string:
59 *
60 * h1.h2.h3.h4.p1.p2
61 *
62 * The prefix, "h1.h2.h3.h4", is the standard textual form for
63 * representing an IPv4 address, which is always four octets long.
64 * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
65 * the first through fourth octets each converted to ASCII-decimal.
66 * Assuming big-endian ordering, p1 and p2 are, respectively, the first
67 * and second octets each converted to ASCII-decimal. For example, if a
68 * host, in big-endian order, has an address of 0x0A010307 and there is
69 * a service listening on, in big endian order, port 0x020F (decimal
70 * 527), then the complete universal address is "10.1.3.7.2.15".
71 *
72 * ...
73 *
74 * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
75 * US-ASCII string:
76 *
77 * x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
78 *
79 * The suffix "p1.p2" is the service port, and is computed the same way
80 * as with universal addresses for TCP and UDP over IPv4. The prefix,
81 * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
82 * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
83 * Additionally, the two alternative forms specified in Section 2.2 of
84 * [RFC2373] are also acceptable.
85 *
86 * XXX: Currently this implementation does not explicitly convert the
87 * stored address to US-ASCII on non-ASCII systems.
88 */
89#define RPCB_MAXADDRLEN (128u)
90
91/*
92 * r_netid
93 *
94 * Quoting RFC 3530, section 2.2:
95 *
96 * For TCP over IPv4 the value of r_netid is the string "tcp". For UDP
97 * over IPv4 the value of r_netid is the string "udp".
98 *
99 * ...
100 *
101 * For TCP over IPv6 the value of r_netid is the string "tcp6". For UDP
102 * over IPv6 the value of r_netid is the string "udp6".
103 */
104#define RPCB_NETID_UDP "\165\144\160" /* "udp" */
105#define RPCB_NETID_TCP "\164\143\160" /* "tcp" */
106#define RPCB_NETID_UDP6 "\165\144\160\066" /* "udp6" */
107#define RPCB_NETID_TCP6 "\164\143\160\066" /* "tcp6" */
108
109#define RPCB_MAXNETIDLEN (4u)
110
111/*
112 * r_owner
113 *
114 * The "owner" is allowed to unset a service in the rpcbind database.
115 * We always use the following (arbitrary) fixed string.
116 */
117#define RPCB_OWNER_STRING "rpcb"
118#define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING)
119
120static void rpcb_getport_done(struct rpc_task *, void *);
121extern struct rpc_program rpcb_program;
122
123struct rpcbind_args {
124 struct rpc_xprt * r_xprt;
125
126 u32 r_prog;
127 u32 r_vers;
128 u32 r_prot;
129 unsigned short r_port;
130 char * r_netid;
131 char r_addr[RPCB_MAXADDRLEN];
132 char * r_owner;
133};
134
135static struct rpc_procinfo rpcb_procedures2[];
136static struct rpc_procinfo rpcb_procedures3[];
137
138static struct rpcb_info {
139 int rpc_vers;
140 struct rpc_procinfo * rpc_proc;
141} rpcb_next_version[];
142
143static void rpcb_getport_prepare(struct rpc_task *task, void *calldata)
144{
145 struct rpcbind_args *map = calldata;
146 struct rpc_xprt *xprt = map->r_xprt;
147 struct rpc_message msg = {
148 .rpc_proc = rpcb_next_version[xprt->bind_index].rpc_proc,
149 .rpc_argp = map,
150 .rpc_resp = &map->r_port,
151 };
152
153 rpc_call_setup(task, &msg, 0);
154}
155
156static void rpcb_map_release(void *data)
157{
158 struct rpcbind_args *map = data;
159
160 xprt_put(map->r_xprt);
161 kfree(map);
162}
163
164static const struct rpc_call_ops rpcb_getport_ops = {
165 .rpc_call_prepare = rpcb_getport_prepare,
166 .rpc_call_done = rpcb_getport_done,
167 .rpc_release = rpcb_map_release,
168};
169
170static void rpcb_wake_rpcbind_waiters(struct rpc_xprt *xprt, int status)
171{
172 xprt_clear_binding(xprt);
173 rpc_wake_up_status(&xprt->binding, status);
174}
175
176static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
177 int proto, int version, int privileged)
178{
179 struct rpc_create_args args = {
180 .protocol = proto,
181 .address = srvaddr,
182 .addrsize = sizeof(struct sockaddr_in),
183 .servername = hostname,
184 .program = &rpcb_program,
185 .version = version,
186 .authflavor = RPC_AUTH_UNIX,
187 .flags = (RPC_CLNT_CREATE_ONESHOT |
188 RPC_CLNT_CREATE_NOPING),
189 };
190
191 ((struct sockaddr_in *)srvaddr)->sin_port = htons(RPCBIND_PORT);
192 if (!privileged)
193 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
194 return rpc_create(&args);
195}
196
197/**
198 * rpcb_register - set or unset a port registration with the local rpcbind svc
199 * @prog: RPC program number to bind
200 * @vers: RPC version number to bind
201 * @prot: transport protocol to use to make this request
202 * @port: port value to register
203 * @okay: result code
204 *
205 * port == 0 means unregister, port != 0 means register.
206 *
207 * This routine supports only rpcbind version 2.
208 */
209int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
210{
211 struct sockaddr_in sin = {
212 .sin_family = AF_INET,
213 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
214 };
215 struct rpcbind_args map = {
216 .r_prog = prog,
217 .r_vers = vers,
218 .r_prot = prot,
219 .r_port = port,
220 };
221 struct rpc_message msg = {
222 .rpc_proc = &rpcb_procedures2[port ?
223 RPCBPROC_SET : RPCBPROC_UNSET],
224 .rpc_argp = &map,
225 .rpc_resp = okay,
226 };
227 struct rpc_clnt *rpcb_clnt;
228 int error = 0;
229
230 dprintk("RPC: %sregistering (%u, %u, %d, %u) with local "
231 "rpcbind\n", (port ? "" : "un"),
232 prog, vers, prot, port);
233
234 rpcb_clnt = rpcb_create("localhost", (struct sockaddr *) &sin,
235 IPPROTO_UDP, 2, 1);
236 if (IS_ERR(rpcb_clnt))
237 return PTR_ERR(rpcb_clnt);
238
239 error = rpc_call_sync(rpcb_clnt, &msg, 0);
240
241 if (error < 0)
242 printk(KERN_WARNING "RPC: failed to contact local rpcbind "
243 "server (errno %d).\n", -error);
244 dprintk("RPC: registration status %d/%d\n", error, *okay);
245
246 return error;
247}
248
249#ifdef CONFIG_ROOT_NFS
250/**
251 * rpcb_getport_external - obtain the port for an RPC service on a given host
252 * @sin: address of remote peer
253 * @prog: RPC program number to bind
254 * @vers: RPC version number to bind
255 * @prot: transport protocol to use to make this request
256 *
257 * Called from outside the RPC client in a synchronous task context.
258 *
259 * For now, this supports only version 2 queries, but is used only by
260 * mount_clnt for NFS_ROOT.
261 */
262int rpcb_getport_external(struct sockaddr_in *sin, __u32 prog,
263 __u32 vers, int prot)
264{
265 struct rpcbind_args map = {
266 .r_prog = prog,
267 .r_vers = vers,
268 .r_prot = prot,
269 .r_port = 0,
270 };
271 struct rpc_message msg = {
272 .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
273 .rpc_argp = &map,
274 .rpc_resp = &map.r_port,
275 };
276 struct rpc_clnt *rpcb_clnt;
277 char hostname[40];
278 int status;
279
280 dprintk("RPC: rpcb_getport_external(%u.%u.%u.%u, %u, %u, %d)\n",
281 NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
282
283 sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
284 rpcb_clnt = rpcb_create(hostname, (struct sockaddr *)sin, prot, 2, 0);
285 if (IS_ERR(rpcb_clnt))
286 return PTR_ERR(rpcb_clnt);
287
288 status = rpc_call_sync(rpcb_clnt, &msg, 0);
289
290 if (status >= 0) {
291 if (map.r_port != 0)
292 return map.r_port;
293 status = -EACCES;
294 }
295 return status;
296}
297#endif
298
299/**
300 * rpcb_getport - obtain the port for a given RPC service on a given host
301 * @task: task that is waiting for portmapper request
302 *
303 * This one can be called for an ongoing RPC request, and can be used in
304 * an async (rpciod) context.
305 */
306void rpcb_getport(struct rpc_task *task)
307{
308 struct rpc_clnt *clnt = task->tk_client;
309 int bind_version;
310 struct rpc_xprt *xprt = task->tk_xprt;
311 struct rpc_clnt *rpcb_clnt;
312 static struct rpcbind_args *map;
313 struct rpc_task *child;
314 struct sockaddr addr;
315 int status;
316
317 dprintk("RPC: %5u rpcb_getport(%s, %u, %u, %d)\n",
318 task->tk_pid, clnt->cl_server,
319 clnt->cl_prog, clnt->cl_vers, xprt->prot);
320
321 /* Autobind on cloned rpc clients is discouraged */
322 BUG_ON(clnt->cl_parent != clnt);
323
324 if (xprt_test_and_set_binding(xprt)) {
325 status = -EACCES; /* tell caller to check again */
326 dprintk("RPC: %5u rpcb_getport waiting for another binder\n",
327 task->tk_pid);
328 goto bailout_nowake;
329 }
330
331 /* Put self on queue before sending rpcbind request, in case
332 * rpcb_getport_done completes before we return from rpc_run_task */
333 rpc_sleep_on(&xprt->binding, task, NULL, NULL);
334
335 /* Someone else may have bound if we slept */
336 if (xprt_bound(xprt)) {
337 status = 0;
338 dprintk("RPC: %5u rpcb_getport already bound\n", task->tk_pid);
339 goto bailout_nofree;
340 }
341
342 if (rpcb_next_version[xprt->bind_index].rpc_proc == NULL) {
343 xprt->bind_index = 0;
344 status = -EACCES; /* tell caller to try again later */
345 dprintk("RPC: %5u rpcb_getport no more getport versions "
346 "available\n", task->tk_pid);
347 goto bailout_nofree;
348 }
349 bind_version = rpcb_next_version[xprt->bind_index].rpc_vers;
350
351 dprintk("RPC: %5u rpcb_getport trying rpcbind version %u\n",
352 task->tk_pid, bind_version);
353
354 map = kzalloc(sizeof(struct rpcbind_args), GFP_ATOMIC);
355 if (!map) {
356 status = -ENOMEM;
357 dprintk("RPC: %5u rpcb_getport no memory available\n",
358 task->tk_pid);
359 goto bailout_nofree;
360 }
361 map->r_prog = clnt->cl_prog;
362 map->r_vers = clnt->cl_vers;
363 map->r_prot = xprt->prot;
364 map->r_port = 0;
365 map->r_xprt = xprt_get(xprt);
366 map->r_netid = (xprt->prot == IPPROTO_TCP) ? RPCB_NETID_TCP :
367 RPCB_NETID_UDP;
368 memcpy(&map->r_addr, rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR),
369 sizeof(map->r_addr));
370 map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */
371
372 rpc_peeraddr(clnt, (void *)&addr, sizeof(addr));
373 rpcb_clnt = rpcb_create(clnt->cl_server, &addr, xprt->prot, bind_version, 0);
374 if (IS_ERR(rpcb_clnt)) {
375 status = PTR_ERR(rpcb_clnt);
376 dprintk("RPC: %5u rpcb_getport rpcb_create failed, error %ld\n",
377 task->tk_pid, PTR_ERR(rpcb_clnt));
378 goto bailout;
379 }
380
381 child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);
382 if (IS_ERR(child)) {
383 status = -EIO;
384 dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n",
385 task->tk_pid);
386 goto bailout_nofree;
387 }
388 rpc_put_task(child);
389
390 task->tk_xprt->stat.bind_count++;
391 return;
392
393bailout:
394 kfree(map);
395 xprt_put(xprt);
396bailout_nofree:
397 rpcb_wake_rpcbind_waiters(xprt, status);
398bailout_nowake:
399 task->tk_status = status;
400}
401
402/*
403 * Rpcbind child task calls this callback via tk_exit.
404 */
405static void rpcb_getport_done(struct rpc_task *child, void *data)
406{
407 struct rpcbind_args *map = data;
408 struct rpc_xprt *xprt = map->r_xprt;
409 int status = child->tk_status;
410
411 /* rpcbind server doesn't support this rpcbind protocol version */
412 if (status == -EPROTONOSUPPORT)
413 xprt->bind_index++;
414
415 if (status < 0) {
416 /* rpcbind server not available on remote host? */
417 xprt->ops->set_port(xprt, 0);
418 } else if (map->r_port == 0) {
419 /* Requested RPC service wasn't registered on remote host */
420 xprt->ops->set_port(xprt, 0);
421 status = -EACCES;
422 } else {
423 /* Succeeded */
424 xprt->ops->set_port(xprt, map->r_port);
425 xprt_set_bound(xprt);
426 status = 0;
427 }
428
429 dprintk("RPC: %5u rpcb_getport_done(status %d, port %u)\n",
430 child->tk_pid, status, map->r_port);
431
432 rpcb_wake_rpcbind_waiters(xprt, status);
433}
434
435static int rpcb_encode_mapping(struct rpc_rqst *req, __be32 *p,
436 struct rpcbind_args *rpcb)
437{
438 dprintk("RPC: rpcb_encode_mapping(%u, %u, %d, %u)\n",
439 rpcb->r_prog, rpcb->r_vers, rpcb->r_prot, rpcb->r_port);
440 *p++ = htonl(rpcb->r_prog);
441 *p++ = htonl(rpcb->r_vers);
442 *p++ = htonl(rpcb->r_prot);
443 *p++ = htonl(rpcb->r_port);
444
445 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
446 return 0;
447}
448
449static int rpcb_decode_getport(struct rpc_rqst *req, __be32 *p,
450 unsigned short *portp)
451{
452 *portp = (unsigned short) ntohl(*p++);
453 dprintk("RPC: rpcb_decode_getport result %u\n",
454 *portp);
455 return 0;
456}
457
458static int rpcb_decode_set(struct rpc_rqst *req, __be32 *p,
459 unsigned int *boolp)
460{
461 *boolp = (unsigned int) ntohl(*p++);
462 dprintk("RPC: rpcb_decode_set result %u\n",
463 *boolp);
464 return 0;
465}
466
467static int rpcb_encode_getaddr(struct rpc_rqst *req, __be32 *p,
468 struct rpcbind_args *rpcb)
469{
470 dprintk("RPC: rpcb_encode_getaddr(%u, %u, %s)\n",
471 rpcb->r_prog, rpcb->r_vers, rpcb->r_addr);
472 *p++ = htonl(rpcb->r_prog);
473 *p++ = htonl(rpcb->r_vers);
474
475 p = xdr_encode_string(p, rpcb->r_netid);
476 p = xdr_encode_string(p, rpcb->r_addr);
477 p = xdr_encode_string(p, rpcb->r_owner);
478
479 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
480
481 return 0;
482}
483
484static int rpcb_decode_getaddr(struct rpc_rqst *req, __be32 *p,
485 unsigned short *portp)
486{
487 char *addr;
488 int addr_len, c, i, f, first, val;
489
490 *portp = 0;
491 addr_len = (unsigned int) ntohl(*p++);
492 if (addr_len > RPCB_MAXADDRLEN) /* sanity */
493 return -EINVAL;
494
495 dprintk("RPC: rpcb_decode_getaddr returned string: '%s'\n",
496 (char *) p);
497
498 addr = (char *)p;
499 val = 0;
500 first = 1;
501 f = 1;
502 for (i = addr_len - 1; i > 0; i--) {
503 c = addr[i];
504 if (c >= '0' && c <= '9') {
505 val += (c - '0') * f;
506 f *= 10;
507 } else if (c == '.') {
508 if (first) {
509 *portp = val;
510 val = first = 0;
511 f = 1;
512 } else {
513 *portp |= (val << 8);
514 break;
515 }
516 }
517 }
518
519 dprintk("RPC: rpcb_decode_getaddr port=%u\n", *portp);
520 return 0;
521}
522
523#define RPCB_program_sz (1u)
524#define RPCB_version_sz (1u)
525#define RPCB_protocol_sz (1u)
526#define RPCB_port_sz (1u)
527#define RPCB_boolean_sz (1u)
528
529#define RPCB_netid_sz (1+XDR_QUADLEN(RPCB_MAXNETIDLEN))
530#define RPCB_addr_sz (1+XDR_QUADLEN(RPCB_MAXADDRLEN))
531#define RPCB_ownerstring_sz (1+XDR_QUADLEN(RPCB_MAXOWNERLEN))
532
533#define RPCB_mappingargs_sz RPCB_program_sz+RPCB_version_sz+ \
534 RPCB_protocol_sz+RPCB_port_sz
535#define RPCB_getaddrargs_sz RPCB_program_sz+RPCB_version_sz+ \
536 RPCB_netid_sz+RPCB_addr_sz+ \
537 RPCB_ownerstring_sz
538
539#define RPCB_setres_sz RPCB_boolean_sz
540#define RPCB_getportres_sz RPCB_port_sz
541
542/*
543 * Note that RFC 1833 does not put any size restrictions on the
544 * address string returned by the remote rpcbind database.
545 */
546#define RPCB_getaddrres_sz RPCB_addr_sz
547
548#define PROC(proc, argtype, restype) \
549 [RPCBPROC_##proc] = { \
550 .p_proc = RPCBPROC_##proc, \
551 .p_encode = (kxdrproc_t) rpcb_encode_##argtype, \
552 .p_decode = (kxdrproc_t) rpcb_decode_##restype, \
553 .p_arglen = RPCB_##argtype##args_sz, \
554 .p_replen = RPCB_##restype##res_sz, \
555 .p_statidx = RPCBPROC_##proc, \
556 .p_timer = 0, \
557 .p_name = #proc, \
558 }
559
560/*
561 * Not all rpcbind procedures described in RFC 1833 are implemented
562 * since the Linux kernel RPC code requires only these.
563 */
564static struct rpc_procinfo rpcb_procedures2[] = {
565 PROC(SET, mapping, set),
566 PROC(UNSET, mapping, set),
567 PROC(GETADDR, mapping, getport),
568};
569
570static struct rpc_procinfo rpcb_procedures3[] = {
571 PROC(SET, mapping, set),
572 PROC(UNSET, mapping, set),
573 PROC(GETADDR, getaddr, getaddr),
574};
575
576static struct rpc_procinfo rpcb_procedures4[] = {
577 PROC(SET, mapping, set),
578 PROC(UNSET, mapping, set),
579 PROC(GETVERSADDR, getaddr, getaddr),
580};
581
582static struct rpcb_info rpcb_next_version[] = {
583#ifdef CONFIG_SUNRPC_BIND34
584 { 4, &rpcb_procedures4[RPCBPROC_GETVERSADDR] },
585 { 3, &rpcb_procedures3[RPCBPROC_GETADDR] },
586#endif
587 { 2, &rpcb_procedures2[RPCBPROC_GETPORT] },
588 { 0, NULL },
589};
590
591static struct rpc_version rpcb_version2 = {
592 .number = 2,
593 .nrprocs = RPCB_HIGHPROC_2,
594 .procs = rpcb_procedures2
595};
596
597static struct rpc_version rpcb_version3 = {
598 .number = 3,
599 .nrprocs = RPCB_HIGHPROC_3,
600 .procs = rpcb_procedures3
601};
602
603static struct rpc_version rpcb_version4 = {
604 .number = 4,
605 .nrprocs = RPCB_HIGHPROC_4,
606 .procs = rpcb_procedures4
607};
608
609static struct rpc_version *rpcb_version[] = {
610 NULL,
611 NULL,
612 &rpcb_version2,
613 &rpcb_version3,
614 &rpcb_version4
615};
616
617static struct rpc_stat rpcb_stats;
618
619struct rpc_program rpcb_program = {
620 .name = "rpcbind",
621 .number = RPCBIND_PROGRAM,
622 .nrvers = ARRAY_SIZE(rpcb_version),
623 .version = rpcb_version,
624 .stats = &rpcb_stats,
625};
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 6d87320074b1..4a53e94f8134 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -741,50 +741,53 @@ static void rpc_async_schedule(struct work_struct *work)
741 * @task: RPC task that will use this buffer 741 * @task: RPC task that will use this buffer
742 * @size: requested byte size 742 * @size: requested byte size
743 * 743 *
744 * We try to ensure that some NFS reads and writes can always proceed 744 * To prevent rpciod from hanging, this allocator never sleeps,
745 * by using a mempool when allocating 'small' buffers. 745 * returning NULL if the request cannot be serviced immediately.
746 * The caller can arrange to sleep in a way that is safe for rpciod.
747 *
748 * Most requests are 'small' (under 2KiB) and can be serviced from a
749 * mempool, ensuring that NFS reads and writes can always proceed,
750 * and that there is good locality of reference for these buffers.
751 *
746 * In order to avoid memory starvation triggering more writebacks of 752 * In order to avoid memory starvation triggering more writebacks of
747 * NFS requests, we use GFP_NOFS rather than GFP_KERNEL. 753 * NFS requests, we avoid using GFP_KERNEL.
748 */ 754 */
749void * rpc_malloc(struct rpc_task *task, size_t size) 755void *rpc_malloc(struct rpc_task *task, size_t size)
750{ 756{
751 struct rpc_rqst *req = task->tk_rqstp; 757 size_t *buf;
752 gfp_t gfp; 758 gfp_t gfp = RPC_IS_SWAPPER(task) ? GFP_ATOMIC : GFP_NOWAIT;
753 759
754 if (task->tk_flags & RPC_TASK_SWAPPER) 760 size += sizeof(size_t);
755 gfp = GFP_ATOMIC; 761 if (size <= RPC_BUFFER_MAXSIZE)
762 buf = mempool_alloc(rpc_buffer_mempool, gfp);
756 else 763 else
757 gfp = GFP_NOFS; 764 buf = kmalloc(size, gfp);
758 765 *buf = size;
759 if (size > RPC_BUFFER_MAXSIZE) { 766 dprintk("RPC: %5u allocated buffer of size %u at %p\n",
760 req->rq_buffer = kmalloc(size, gfp); 767 task->tk_pid, size, buf);
761 if (req->rq_buffer) 768 return (void *) ++buf;
762 req->rq_bufsize = size;
763 } else {
764 req->rq_buffer = mempool_alloc(rpc_buffer_mempool, gfp);
765 if (req->rq_buffer)
766 req->rq_bufsize = RPC_BUFFER_MAXSIZE;
767 }
768 return req->rq_buffer;
769} 769}
770 770
771/** 771/**
772 * rpc_free - free buffer allocated via rpc_malloc 772 * rpc_free - free buffer allocated via rpc_malloc
773 * @task: RPC task with a buffer to be freed 773 * @buffer: buffer to free
774 * 774 *
775 */ 775 */
776void rpc_free(struct rpc_task *task) 776void rpc_free(void *buffer)
777{ 777{
778 struct rpc_rqst *req = task->tk_rqstp; 778 size_t size, *buf = (size_t *) buffer;
779 779
780 if (req->rq_buffer) { 780 if (!buffer)
781 if (req->rq_bufsize == RPC_BUFFER_MAXSIZE) 781 return;
782 mempool_free(req->rq_buffer, rpc_buffer_mempool); 782 size = *buf;
783 else 783 buf--;
784 kfree(req->rq_buffer); 784
785 req->rq_buffer = NULL; 785 dprintk("RPC: freeing buffer of size %u at %p\n",
786 req->rq_bufsize = 0; 786 size, buf);
787 } 787 if (size <= RPC_BUFFER_MAXSIZE)
788 mempool_free(buf, rpc_buffer_mempool);
789 else
790 kfree(buf);
788} 791}
789 792
790/* 793/*
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index b4db53ff1435..b7503c103ae8 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -757,7 +757,7 @@ svc_register(struct svc_serv *serv, int proto, unsigned short port)
757 if (progp->pg_vers[i]->vs_hidden) 757 if (progp->pg_vers[i]->vs_hidden)
758 continue; 758 continue;
759 759
760 error = rpc_register(progp->pg_prog, i, proto, port, &dummy); 760 error = rpcb_register(progp->pg_prog, i, proto, port, &dummy);
761 if (error < 0) 761 if (error < 0)
762 break; 762 break;
763 if (port && !dummy) { 763 if (port && !dummy) {
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 456a14510308..5b05b73e4c1d 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -823,7 +823,6 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt)
823 req->rq_task = task; 823 req->rq_task = task;
824 req->rq_xprt = xprt; 824 req->rq_xprt = xprt;
825 req->rq_buffer = NULL; 825 req->rq_buffer = NULL;
826 req->rq_bufsize = 0;
827 req->rq_xid = xprt_alloc_xid(xprt); 826 req->rq_xid = xprt_alloc_xid(xprt);
828 req->rq_release_snd_buf = NULL; 827 req->rq_release_snd_buf = NULL;
829 xprt_reset_majortimeo(req); 828 xprt_reset_majortimeo(req);
@@ -855,7 +854,7 @@ void xprt_release(struct rpc_task *task)
855 mod_timer(&xprt->timer, 854 mod_timer(&xprt->timer,
856 xprt->last_used + xprt->idle_timeout); 855 xprt->last_used + xprt->idle_timeout);
857 spin_unlock_bh(&xprt->transport_lock); 856 spin_unlock_bh(&xprt->transport_lock);
858 xprt->ops->buf_free(task); 857 xprt->ops->buf_free(req->rq_buffer);
859 task->tk_rqstp = NULL; 858 task->tk_rqstp = NULL;
860 if (req->rq_release_snd_buf) 859 if (req->rq_release_snd_buf)
861 req->rq_release_snd_buf(req); 860 req->rq_release_snd_buf(req);
@@ -928,6 +927,7 @@ struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t si
928 xprt->timer.data = (unsigned long) xprt; 927 xprt->timer.data = (unsigned long) xprt;
929 xprt->last_used = jiffies; 928 xprt->last_used = jiffies;
930 xprt->cwnd = RPC_INITCWND; 929 xprt->cwnd = RPC_INITCWND;
930 xprt->bind_index = 0;
931 931
932 rpc_init_wait_queue(&xprt->binding, "xprt_binding"); 932 rpc_init_wait_queue(&xprt->binding, "xprt_binding");
933 rpc_init_wait_queue(&xprt->pending, "xprt_pending"); 933 rpc_init_wait_queue(&xprt->pending, "xprt_pending");
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index a5a32029e728..cc33c5880abb 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1476,7 +1476,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
1476 .set_buffer_size = xs_udp_set_buffer_size, 1476 .set_buffer_size = xs_udp_set_buffer_size,
1477 .reserve_xprt = xprt_reserve_xprt_cong, 1477 .reserve_xprt = xprt_reserve_xprt_cong,
1478 .release_xprt = xprt_release_xprt_cong, 1478 .release_xprt = xprt_release_xprt_cong,
1479 .rpcbind = rpc_getport, 1479 .rpcbind = rpcb_getport,
1480 .set_port = xs_set_port, 1480 .set_port = xs_set_port,
1481 .connect = xs_connect, 1481 .connect = xs_connect,
1482 .buf_alloc = rpc_malloc, 1482 .buf_alloc = rpc_malloc,
@@ -1493,7 +1493,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
1493static struct rpc_xprt_ops xs_tcp_ops = { 1493static struct rpc_xprt_ops xs_tcp_ops = {
1494 .reserve_xprt = xprt_reserve_xprt, 1494 .reserve_xprt = xprt_reserve_xprt,
1495 .release_xprt = xs_tcp_release_xprt, 1495 .release_xprt = xs_tcp_release_xprt,
1496 .rpcbind = rpc_getport, 1496 .rpcbind = rpcb_getport,
1497 .set_port = xs_set_port, 1497 .set_port = xs_set_port,
1498 .connect = xs_connect, 1498 .connect = xs_connect,
1499 .buf_alloc = rpc_malloc, 1499 .buf_alloc = rpc_malloc,
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-04 12:11:24 -0500