]>
Commit | Line | Data |
---|---|---|
24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 | 37 | #include <linux/in6.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
40401530 | 39 | #include <linux/idr.h> |
3b0d3f93 | 40 | #include <net/ipv6.h> |
24c8dbbb | 41 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 42 | #include <linux/sunrpc/bc_xprt.h> |
6b13168b SK |
43 | #include <linux/nsproxy.h> |
44 | #include <linux/pid_namespace.h> | |
24c8dbbb | 45 | |
24c8dbbb DH |
46 | |
47 | #include "nfs4_fs.h" | |
48 | #include "callback.h" | |
49 | #include "delegation.h" | |
50 | #include "iostat.h" | |
51 | #include "internal.h" | |
14727281 | 52 | #include "fscache.h" |
85e174ba | 53 | #include "pnfs.h" |
6b13168b | 54 | #include "netns.h" |
24c8dbbb DH |
55 | |
56 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
57 | ||
24c8dbbb | 58 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
f4eecd5d | 59 | #ifdef CONFIG_NFS_V4 |
f4eecd5d AA |
60 | |
61 | /* | |
62 | * Get a unique NFSv4.0 callback identifier which will be used | |
63 | * by the V4.0 callback service to lookup the nfs_client struct | |
64 | */ | |
65 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
66 | { | |
67 | int ret = 0; | |
73ea666c | 68 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f4eecd5d AA |
69 | |
70 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
71 | return ret; | |
72 | retry: | |
28cd1b3f | 73 | if (!idr_pre_get(&nn->cb_ident_idr, GFP_KERNEL)) |
f4eecd5d | 74 | return -ENOMEM; |
dc030858 | 75 | spin_lock(&nn->nfs_client_lock); |
28cd1b3f | 76 | ret = idr_get_new(&nn->cb_ident_idr, clp, &clp->cl_cb_ident); |
dc030858 | 77 | spin_unlock(&nn->nfs_client_lock); |
f4eecd5d AA |
78 | if (ret == -EAGAIN) |
79 | goto retry; | |
80 | return ret; | |
81 | } | |
82 | #endif /* CONFIG_NFS_V4 */ | |
24c8dbbb | 83 | |
b064eca2 TM |
84 | /* |
85 | * Turn off NFSv4 uid/gid mapping when using AUTH_SYS | |
86 | */ | |
90ab5ee9 | 87 | static bool nfs4_disable_idmapping = true; |
b064eca2 | 88 | |
5006a76c DH |
89 | /* |
90 | * RPC cruft for NFS | |
91 | */ | |
a613fa16 | 92 | static const struct rpc_version *nfs_version[5] = { |
2ba68002 | 93 | #ifdef CONFIG_NFS_V2 |
5006a76c | 94 | [2] = &nfs_version2, |
2ba68002 | 95 | #endif |
5006a76c DH |
96 | #ifdef CONFIG_NFS_V3 |
97 | [3] = &nfs_version3, | |
98 | #endif | |
99 | #ifdef CONFIG_NFS_V4 | |
100 | [4] = &nfs_version4, | |
101 | #endif | |
102 | }; | |
103 | ||
a613fa16 | 104 | const struct rpc_program nfs_program = { |
5006a76c DH |
105 | .name = "nfs", |
106 | .number = NFS_PROGRAM, | |
107 | .nrvers = ARRAY_SIZE(nfs_version), | |
108 | .version = nfs_version, | |
109 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 110 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
111 | }; |
112 | ||
113 | struct rpc_stat nfs_rpcstat = { | |
114 | .program = &nfs_program | |
115 | }; | |
116 | ||
117 | ||
118 | #ifdef CONFIG_NFS_V3_ACL | |
119 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
a613fa16 | 120 | static const struct rpc_version *nfsacl_version[] = { |
5006a76c DH |
121 | [3] = &nfsacl_version3, |
122 | }; | |
123 | ||
a613fa16 | 124 | const struct rpc_program nfsacl_program = { |
5006a76c DH |
125 | .name = "nfsacl", |
126 | .number = NFS_ACL_PROGRAM, | |
127 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
128 | .version = nfsacl_version, | |
129 | .stats = &nfsacl_rpcstat, | |
130 | }; | |
131 | #endif /* CONFIG_NFS_V3_ACL */ | |
132 | ||
3a498026 | 133 | struct nfs_client_initdata { |
4bf590e0 | 134 | unsigned long init_flags; |
3a498026 | 135 | const char *hostname; |
d7422c47 | 136 | const struct sockaddr *addr; |
6e4cffd7 | 137 | size_t addrlen; |
40c55319 | 138 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 139 | int proto; |
5aae4a9a | 140 | u32 minorversion; |
e50a7a1a | 141 | struct net *net; |
3a498026 TM |
142 | }; |
143 | ||
24c8dbbb DH |
144 | /* |
145 | * Allocate a shared client record | |
146 | * | |
147 | * Since these are allocated/deallocated very rarely, we don't | |
148 | * bother putting them in a slab cache... | |
149 | */ | |
6663ee7f | 150 | struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
151 | { |
152 | struct nfs_client *clp; | |
7c67db3a | 153 | struct rpc_cred *cred; |
a21bdd9b | 154 | int err = -ENOMEM; |
24c8dbbb DH |
155 | |
156 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
157 | goto error_0; | |
158 | ||
40c55319 TM |
159 | clp->rpc_ops = cl_init->rpc_ops; |
160 | ||
24c8dbbb DH |
161 | atomic_set(&clp->cl_count, 1); |
162 | clp->cl_cons_state = NFS_CS_INITING; | |
163 | ||
6e4cffd7 CL |
164 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
165 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 166 | |
3a498026 | 167 | if (cl_init->hostname) { |
a21bdd9b | 168 | err = -ENOMEM; |
3a498026 | 169 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 170 | if (!clp->cl_hostname) |
71468513 | 171 | goto error_cleanup; |
24c8dbbb DH |
172 | } |
173 | ||
174 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
175 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
176 | ||
59dca3b2 | 177 | clp->cl_proto = cl_init->proto; |
73ea666c | 178 | clp->cl_net = get_net(cl_init->net); |
59dca3b2 | 179 | |
68c97153 | 180 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
181 | if (!IS_ERR(cred)) |
182 | clp->cl_machine_cred = cred; | |
14727281 DH |
183 | nfs_fscache_get_client_cookie(clp); |
184 | ||
24c8dbbb DH |
185 | return clp; |
186 | ||
71468513 | 187 | error_cleanup: |
24c8dbbb DH |
188 | kfree(clp); |
189 | error_0: | |
a21bdd9b | 190 | return ERR_PTR(err); |
24c8dbbb DH |
191 | } |
192 | ||
5dd3177a | 193 | #ifdef CONFIG_NFS_V4 |
557134a3 | 194 | #ifdef CONFIG_NFS_V4_1 |
ea005281 AA |
195 | static void nfs4_shutdown_session(struct nfs_client *clp) |
196 | { | |
7df529af | 197 | if (nfs4_has_session(clp)) { |
557134a3 | 198 | nfs4_destroy_session(clp->cl_session); |
66245539 | 199 | nfs4_destroy_clientid(clp); |
7df529af TM |
200 | } |
201 | ||
888ef2e3 | 202 | } |
ea005281 AA |
203 | #else /* CONFIG_NFS_V4_1 */ |
204 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
205 | { | |
206 | } | |
207 | #endif /* CONFIG_NFS_V4_1 */ | |
71468513 | 208 | |
6663ee7f BS |
209 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) |
210 | { | |
211 | int err; | |
212 | struct nfs_client *clp = nfs_alloc_client(cl_init); | |
213 | if (IS_ERR(clp)) | |
214 | return clp; | |
215 | ||
216 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
217 | if (err) | |
218 | goto error; | |
219 | ||
220 | spin_lock_init(&clp->cl_lock); | |
221 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
222 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); | |
223 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
224 | clp->cl_minorversion = cl_init->minorversion; | |
225 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; | |
226 | return clp; | |
227 | ||
228 | error: | |
229 | kfree(clp); | |
230 | return ERR_PTR(err); | |
231 | } | |
232 | ||
888ef2e3 AB |
233 | /* |
234 | * Destroy the NFS4 callback service | |
235 | */ | |
236 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
237 | { | |
238 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 239 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
240 | } |
241 | ||
242 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
243 | { | |
244 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
245 | nfs4_kill_renewd(clp); | |
ea005281 | 246 | nfs4_shutdown_session(clp); |
71468513 | 247 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
248 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
249 | nfs_idmap_delete(clp); | |
250 | ||
251 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
acdeb69d | 252 | kfree(clp->cl_serverowner); |
79d4e1f0 | 253 | kfree(clp->cl_serverscope); |
59155546 | 254 | kfree(clp->cl_implid); |
557134a3 | 255 | } |
f4eecd5d | 256 | |
cdb7eced BS |
257 | void nfs4_free_client(struct nfs_client *clp) |
258 | { | |
259 | nfs4_shutdown_client(clp); | |
260 | nfs_free_client(clp); | |
261 | } | |
262 | ||
f4eecd5d | 263 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ |
28cd1b3f | 264 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d | 265 | { |
28cd1b3f SK |
266 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
267 | ||
268 | idr_destroy(&nn->cb_ident_idr); | |
f4eecd5d AA |
269 | } |
270 | ||
271 | /* nfs_client_lock held */ | |
272 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
273 | { | |
73ea666c | 274 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
28cd1b3f | 275 | |
f4eecd5d | 276 | if (clp->cl_cb_ident) |
28cd1b3f | 277 | idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident); |
f4eecd5d AA |
278 | } |
279 | ||
f7e8917a FI |
280 | static void pnfs_init_server(struct nfs_server *server) |
281 | { | |
282 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
283 | } | |
284 | ||
0aaaf5c4 CL |
285 | static void nfs4_destroy_server(struct nfs_server *server) |
286 | { | |
eeebf916 BS |
287 | nfs_server_return_all_delegations(server); |
288 | unset_pnfs_layoutdriver(server); | |
0aaaf5c4 CL |
289 | nfs4_purge_state_owners(server); |
290 | } | |
291 | ||
888ef2e3 | 292 | #else |
28cd1b3f | 293 | void nfs_cleanup_cb_ident_idr(struct net *net) |
f4eecd5d AA |
294 | { |
295 | } | |
296 | ||
297 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
298 | { | |
299 | } | |
f7e8917a FI |
300 | |
301 | static void pnfs_init_server(struct nfs_server *server) | |
302 | { | |
303 | } | |
304 | ||
888ef2e3 | 305 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 306 | |
24c8dbbb DH |
307 | /* |
308 | * Destroy a shared client record | |
309 | */ | |
cdb7eced | 310 | void nfs_free_client(struct nfs_client *clp) |
24c8dbbb | 311 | { |
40c55319 | 312 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 313 | |
14727281 DH |
314 | nfs_fscache_release_client_cookie(clp); |
315 | ||
24c8dbbb DH |
316 | /* -EIO all pending I/O */ |
317 | if (!IS_ERR(clp->cl_rpcclient)) | |
318 | rpc_shutdown_client(clp->cl_rpcclient); | |
319 | ||
7c67db3a TM |
320 | if (clp->cl_machine_cred != NULL) |
321 | put_rpccred(clp->cl_machine_cred); | |
322 | ||
73ea666c | 323 | put_net(clp->cl_net); |
24c8dbbb DH |
324 | kfree(clp->cl_hostname); |
325 | kfree(clp); | |
326 | ||
327 | dprintk("<-- nfs_free_client()\n"); | |
328 | } | |
329 | ||
330 | /* | |
331 | * Release a reference to a shared client record | |
332 | */ | |
333 | void nfs_put_client(struct nfs_client *clp) | |
334 | { | |
dc030858 SK |
335 | struct nfs_net *nn; |
336 | ||
27ba8512 DH |
337 | if (!clp) |
338 | return; | |
339 | ||
24c8dbbb | 340 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
73ea666c | 341 | nn = net_generic(clp->cl_net, nfs_net_id); |
24c8dbbb | 342 | |
dc030858 | 343 | if (atomic_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) { |
24c8dbbb | 344 | list_del(&clp->cl_share_link); |
f4eecd5d | 345 | nfs_cb_idr_remove_locked(clp); |
dc030858 | 346 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb DH |
347 | |
348 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
349 | ||
cdb7eced | 350 | clp->rpc_ops->free_client(clp); |
24c8dbbb DH |
351 | } |
352 | } | |
16b374ca | 353 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 354 | |
9082a5cc | 355 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
356 | /* |
357 | * Test if two ip6 socket addresses refer to the same socket by | |
358 | * comparing relevant fields. The padding bytes specifically, are not | |
359 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
360 | * and sin6_scope_id is only compared if the address is "link local" | |
361 | * because "link local" addresses need only be unique to a specific | |
362 | * link. Conversely, ordinary unicast addresses might have different | |
363 | * sin6_scope_id. | |
364 | * | |
365 | * The caller should ensure both socket addresses are AF_INET6. | |
366 | */ | |
3c8c45df CL |
367 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
368 | const struct sockaddr *sa2) | |
9f4c899c | 369 | { |
3c8c45df CL |
370 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
371 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 372 | |
b9dd3abb | 373 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 374 | return 0; |
b9dd3abb MJ |
375 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
376 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 377 | |
b9dd3abb | 378 | return 1; |
3b0d3f93 | 379 | } |
3c8c45df CL |
380 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
381 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
382 | const struct sockaddr *sa2) | |
9f4c899c TM |
383 | { |
384 | return 0; | |
385 | } | |
9082a5cc | 386 | #endif |
3b0d3f93 | 387 | |
d7371c41 ID |
388 | /* |
389 | * Test if two ip4 socket addresses refer to the same socket, by | |
390 | * comparing relevant fields. The padding bytes specifically, are | |
391 | * not compared. | |
392 | * | |
393 | * The caller should ensure both socket addresses are AF_INET. | |
394 | */ | |
3c8c45df CL |
395 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
396 | const struct sockaddr *sa2) | |
397 | { | |
398 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
399 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
400 | ||
401 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
402 | } | |
403 | ||
404 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
405 | const struct sockaddr *sa2) | |
406 | { | |
407 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
408 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
409 | ||
410 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
411 | (sin1->sin6_port == sin2->sin6_port); | |
412 | } | |
413 | ||
9f4c899c TM |
414 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
415 | const struct sockaddr *sa2) | |
d7371c41 | 416 | { |
3c8c45df CL |
417 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
418 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 419 | |
3c8c45df CL |
420 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
421 | (sin1->sin_port == sin2->sin_port); | |
422 | } | |
423 | ||
4b7c8dd2 | 424 | #if defined(CONFIG_NFS_V4_1) |
3c8c45df CL |
425 | /* |
426 | * Test if two socket addresses represent the same actual socket, | |
427 | * by comparing (only) relevant fields, excluding the port number. | |
428 | */ | |
429 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
430 | const struct sockaddr *sa2) | |
431 | { | |
432 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 433 | return 0; |
3c8c45df CL |
434 | |
435 | switch (sa1->sa_family) { | |
436 | case AF_INET: | |
437 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
438 | case AF_INET6: | |
439 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
440 | } | |
441 | return 0; | |
d7371c41 | 442 | } |
4b7c8dd2 | 443 | #endif /* CONFIG_NFS_V4_1 */ |
d7371c41 | 444 | |
d7371c41 ID |
445 | /* |
446 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 447 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
448 | */ |
449 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
450 | const struct sockaddr *sa2) | |
451 | { | |
452 | if (sa1->sa_family != sa2->sa_family) | |
453 | return 0; | |
454 | ||
455 | switch (sa1->sa_family) { | |
456 | case AF_INET: | |
9f4c899c | 457 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 458 | case AF_INET6: |
9f4c899c | 459 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
460 | } |
461 | return 0; | |
462 | } | |
463 | ||
4b7c8dd2 | 464 | #if defined(CONFIG_NFS_V4_1) |
c36fca52 | 465 | /* Common match routine for v4.0 and v4.1 callback services */ |
17280175 TM |
466 | static bool nfs4_cb_match_client(const struct sockaddr *addr, |
467 | struct nfs_client *clp, u32 minorversion) | |
24c8dbbb | 468 | { |
c36fca52 | 469 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
24c8dbbb | 470 | |
c36fca52 AA |
471 | /* Don't match clients that failed to initialise */ |
472 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
473 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
474 | return false; | |
3b0d3f93 | 475 | |
54ac471c TM |
476 | smp_rmb(); |
477 | ||
c36fca52 AA |
478 | /* Match the version and minorversion */ |
479 | if (clp->rpc_ops->version != 4 || | |
480 | clp->cl_minorversion != minorversion) | |
481 | return false; | |
13bbc06a | 482 | |
c36fca52 AA |
483 | /* Match only the IP address, not the port number */ |
484 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
485 | return false; | |
24c8dbbb | 486 | |
c36fca52 | 487 | return true; |
3fbd67ad | 488 | } |
4b7c8dd2 | 489 | #endif /* CONFIG_NFS_V4_1 */ |
3fbd67ad | 490 | |
24c8dbbb | 491 | /* |
c81468a1 TM |
492 | * Find an nfs_client on the list that matches the initialisation data |
493 | * that is supplied. | |
24c8dbbb | 494 | */ |
c81468a1 | 495 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
496 | { |
497 | struct nfs_client *clp; | |
d7371c41 | 498 | const struct sockaddr *sap = data->addr; |
6b13168b | 499 | struct nfs_net *nn = net_generic(data->net, nfs_net_id); |
24c8dbbb | 500 | |
6b13168b | 501 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
d7371c41 | 502 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
503 | /* Don't match clients that failed to initialise properly */ |
504 | if (clp->cl_cons_state < 0) | |
505 | continue; | |
506 | ||
507 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 508 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
509 | continue; |
510 | ||
59dca3b2 TM |
511 | if (clp->cl_proto != data->proto) |
512 | continue; | |
5aae4a9a BH |
513 | /* Match nfsv4 minorversion */ |
514 | if (clp->cl_minorversion != data->minorversion) | |
515 | continue; | |
c81468a1 | 516 | /* Match the full socket address */ |
d7371c41 | 517 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
518 | continue; |
519 | ||
520 | atomic_inc(&clp->cl_count); | |
521 | return clp; | |
13bbc06a | 522 | } |
c81468a1 | 523 | return NULL; |
24c8dbbb DH |
524 | } |
525 | ||
4697bd5e TM |
526 | static bool nfs_client_init_is_complete(const struct nfs_client *clp) |
527 | { | |
528 | return clp->cl_cons_state != NFS_CS_INITING; | |
529 | } | |
530 | ||
531 | int nfs_wait_client_init_complete(const struct nfs_client *clp) | |
532 | { | |
533 | return wait_event_killable(nfs_client_active_wq, | |
534 | nfs_client_init_is_complete(clp)); | |
535 | } | |
536 | ||
f411703a CL |
537 | /* |
538 | * Found an existing client. Make sure it's ready before returning. | |
539 | */ | |
540 | static struct nfs_client * | |
541 | nfs_found_client(const struct nfs_client_initdata *cl_init, | |
542 | struct nfs_client *clp) | |
543 | { | |
544 | int error; | |
545 | ||
4697bd5e | 546 | error = nfs_wait_client_init_complete(clp); |
f411703a CL |
547 | if (error < 0) { |
548 | nfs_put_client(clp); | |
549 | return ERR_PTR(-ERESTARTSYS); | |
550 | } | |
551 | ||
552 | if (clp->cl_cons_state < NFS_CS_READY) { | |
553 | error = clp->cl_cons_state; | |
554 | nfs_put_client(clp); | |
555 | return ERR_PTR(error); | |
556 | } | |
557 | ||
54ac471c TM |
558 | smp_rmb(); |
559 | ||
f411703a CL |
560 | dprintk("<-- %s found nfs_client %p for %s\n", |
561 | __func__, clp, cl_init->hostname ?: ""); | |
562 | return clp; | |
563 | } | |
564 | ||
24c8dbbb DH |
565 | /* |
566 | * Look up a client by IP address and protocol version | |
567 | * - creates a new record if one doesn't yet exist | |
568 | */ | |
45a52a02 AA |
569 | static struct nfs_client * |
570 | nfs_get_client(const struct nfs_client_initdata *cl_init, | |
571 | const struct rpc_timeout *timeparms, | |
572 | const char *ip_addr, | |
4bf590e0 | 573 | rpc_authflavor_t authflavour) |
24c8dbbb DH |
574 | { |
575 | struct nfs_client *clp, *new = NULL; | |
6b13168b | 576 | struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id); |
24c8dbbb | 577 | |
d7422c47 CL |
578 | dprintk("--> nfs_get_client(%s,v%u)\n", |
579 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
580 | |
581 | /* see if the client already exists */ | |
582 | do { | |
dc030858 | 583 | spin_lock(&nn->nfs_client_lock); |
24c8dbbb | 584 | |
c81468a1 | 585 | clp = nfs_match_client(cl_init); |
f411703a CL |
586 | if (clp) { |
587 | spin_unlock(&nn->nfs_client_lock); | |
588 | if (new) | |
cdb7eced | 589 | new->rpc_ops->free_client(new); |
f411703a CL |
590 | return nfs_found_client(cl_init, clp); |
591 | } | |
8cab4c39 CL |
592 | if (new) { |
593 | list_add(&new->cl_share_link, &nn->nfs_client_list); | |
594 | spin_unlock(&nn->nfs_client_lock); | |
4bf590e0 | 595 | new->cl_flags = cl_init->init_flags; |
8cab4c39 CL |
596 | return cl_init->rpc_ops->init_client(new, |
597 | timeparms, ip_addr, | |
4bf590e0 | 598 | authflavour); |
8cab4c39 | 599 | } |
24c8dbbb | 600 | |
dc030858 | 601 | spin_unlock(&nn->nfs_client_lock); |
24c8dbbb | 602 | |
6663ee7f | 603 | new = cl_init->rpc_ops->alloc_client(cl_init); |
a21bdd9b | 604 | } while (!IS_ERR(new)); |
24c8dbbb | 605 | |
f411703a CL |
606 | dprintk("<-- nfs_get_client() Failed to find %s (%ld)\n", |
607 | cl_init->hostname ?: "", PTR_ERR(new)); | |
a21bdd9b | 608 | return new; |
24c8dbbb DH |
609 | } |
610 | ||
611 | /* | |
612 | * Mark a server as ready or failed | |
613 | */ | |
76db6d95 | 614 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb | 615 | { |
54ac471c | 616 | smp_wmb(); |
24c8dbbb DH |
617 | clp->cl_cons_state = state; |
618 | wake_up_all(&nfs_client_active_wq); | |
619 | } | |
5006a76c DH |
620 | |
621 | /* | |
622 | * Initialise the timeout values for a connection | |
623 | */ | |
624 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
625 | unsigned int timeo, unsigned int retrans) | |
626 | { | |
627 | to->to_initval = timeo * HZ / 10; | |
628 | to->to_retries = retrans; | |
5006a76c DH |
629 | |
630 | switch (proto) { | |
0896a725 | 631 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 632 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
633 | if (to->to_retries == 0) |
634 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 635 | if (to->to_initval == 0) |
259875ef | 636 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
637 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
638 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
639 | to->to_increment = to->to_initval; | |
640 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
641 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
642 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
643 | if (to->to_maxval < to->to_initval) | |
644 | to->to_maxval = to->to_initval; | |
5006a76c DH |
645 | to->to_exponential = 0; |
646 | break; | |
0896a725 | 647 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
648 | if (to->to_retries == 0) |
649 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 650 | if (!to->to_initval) |
259875ef | 651 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
652 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
653 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
654 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
655 | to->to_exponential = 1; | |
656 | break; | |
259875ef TM |
657 | default: |
658 | BUG(); | |
5006a76c DH |
659 | } |
660 | } | |
661 | ||
662 | /* | |
663 | * Create an RPC client handle | |
664 | */ | |
59dca3b2 | 665 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 | 666 | const struct rpc_timeout *timeparms, |
4bf590e0 | 667 | rpc_authflavor_t flavor) |
5006a76c | 668 | { |
5006a76c | 669 | struct rpc_clnt *clnt = NULL; |
41877d20 | 670 | struct rpc_create_args args = { |
73ea666c | 671 | .net = clp->cl_net, |
59dca3b2 | 672 | .protocol = clp->cl_proto, |
41877d20 | 673 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 674 | .addrsize = clp->cl_addrlen, |
33170233 | 675 | .timeout = timeparms, |
41877d20 CL |
676 | .servername = clp->cl_hostname, |
677 | .program = &nfs_program, | |
678 | .version = clp->rpc_ops->version, | |
679 | .authflavor = flavor, | |
680 | }; | |
5006a76c | 681 | |
4bf590e0 | 682 | if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
4a01b8a4 | 683 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
4bf590e0 | 684 | if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
4a01b8a4 CL |
685 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
686 | ||
5006a76c DH |
687 | if (!IS_ERR(clp->cl_rpcclient)) |
688 | return 0; | |
689 | ||
41877d20 | 690 | clnt = rpc_create(&args); |
5006a76c DH |
691 | if (IS_ERR(clnt)) { |
692 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 693 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
694 | return PTR_ERR(clnt); |
695 | } | |
696 | ||
5006a76c DH |
697 | clp->cl_rpcclient = clnt; |
698 | return 0; | |
699 | } | |
54ceac45 DH |
700 | |
701 | /* | |
702 | * Version 2 or 3 client destruction | |
703 | */ | |
704 | static void nfs_destroy_server(struct nfs_server *server) | |
705 | { | |
5eebde23 SJ |
706 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
707 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 708 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
709 | } |
710 | ||
711 | /* | |
712 | * Version 2 or 3 lockd setup | |
713 | */ | |
714 | static int nfs_start_lockd(struct nfs_server *server) | |
715 | { | |
9289e7f9 CL |
716 | struct nlm_host *host; |
717 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
718 | struct nlmclnt_initdata nlm_init = { |
719 | .hostname = clp->cl_hostname, | |
720 | .address = (struct sockaddr *)&clp->cl_addr, | |
721 | .addrlen = clp->cl_addrlen, | |
883bb163 | 722 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
723 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
724 | 1 : 0, | |
73ea666c | 725 | .net = clp->cl_net, |
883bb163 | 726 | }; |
54ceac45 | 727 | |
883bb163 | 728 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 729 | return 0; |
5eebde23 SJ |
730 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
731 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
732 | return 0; |
733 | ||
8a6e5deb TM |
734 | switch (clp->cl_proto) { |
735 | default: | |
736 | nlm_init.protocol = IPPROTO_TCP; | |
737 | break; | |
738 | case XPRT_TRANSPORT_UDP: | |
739 | nlm_init.protocol = IPPROTO_UDP; | |
740 | } | |
741 | ||
883bb163 | 742 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
743 | if (IS_ERR(host)) |
744 | return PTR_ERR(host); | |
745 | ||
746 | server->nlm_host = host; | |
747 | server->destroy = nfs_destroy_server; | |
748 | return 0; | |
54ceac45 DH |
749 | } |
750 | ||
751 | /* | |
752 | * Initialise an NFSv3 ACL client connection | |
753 | */ | |
754 | #ifdef CONFIG_NFS_V3_ACL | |
755 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
756 | { | |
40c55319 | 757 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
758 | goto out_noacl; |
759 | if (server->flags & NFS_MOUNT_NOACL) | |
760 | goto out_noacl; | |
761 | ||
762 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
763 | if (IS_ERR(server->client_acl)) | |
764 | goto out_noacl; | |
765 | ||
766 | /* No errors! Assume that Sun nfsacls are supported */ | |
767 | server->caps |= NFS_CAP_ACLS; | |
768 | return; | |
769 | ||
770 | out_noacl: | |
771 | server->caps &= ~NFS_CAP_ACLS; | |
772 | } | |
773 | #else | |
774 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
775 | { | |
776 | server->flags &= ~NFS_MOUNT_NOACL; | |
777 | server->caps &= ~NFS_CAP_ACLS; | |
778 | } | |
779 | #endif | |
780 | ||
781 | /* | |
782 | * Create a general RPC client | |
783 | */ | |
33170233 TM |
784 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
785 | const struct rpc_timeout *timeo, | |
786 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
787 | { |
788 | struct nfs_client *clp = server->nfs_client; | |
789 | ||
790 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
791 | if (IS_ERR(server->client)) { | |
3110ff80 | 792 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
793 | return PTR_ERR(server->client); |
794 | } | |
795 | ||
33170233 TM |
796 | memcpy(&server->client->cl_timeout_default, |
797 | timeo, | |
798 | sizeof(server->client->cl_timeout_default)); | |
799 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
800 | ||
54ceac45 DH |
801 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
802 | struct rpc_auth *auth; | |
803 | ||
804 | auth = rpcauth_create(pseudoflavour, server->client); | |
805 | if (IS_ERR(auth)) { | |
3110ff80 | 806 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
807 | return PTR_ERR(auth); |
808 | } | |
809 | } | |
810 | server->client->cl_softrtry = 0; | |
811 | if (server->flags & NFS_MOUNT_SOFT) | |
812 | server->client->cl_softrtry = 1; | |
813 | ||
54ceac45 DH |
814 | return 0; |
815 | } | |
816 | ||
8cab4c39 CL |
817 | /** |
818 | * nfs_init_client - Initialise an NFS2 or NFS3 client | |
819 | * | |
820 | * @clp: nfs_client to initialise | |
821 | * @timeparms: timeout parameters for underlying RPC transport | |
822 | * @ip_addr: IP presentation address (not used) | |
823 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
824 | * |
825 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 826 | */ |
8cab4c39 CL |
827 | struct nfs_client *nfs_init_client(struct nfs_client *clp, |
828 | const struct rpc_timeout *timeparms, | |
4bf590e0 | 829 | const char *ip_addr, rpc_authflavor_t authflavour) |
54ceac45 | 830 | { |
54ceac45 DH |
831 | int error; |
832 | ||
833 | if (clp->cl_cons_state == NFS_CS_READY) { | |
834 | /* the client is already initialised */ | |
835 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 836 | return clp; |
54ceac45 DH |
837 | } |
838 | ||
54ceac45 DH |
839 | /* |
840 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
841 | * - RFC 2623, sec 2.3.2 | |
842 | */ | |
4bf590e0 | 843 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX); |
54ceac45 DH |
844 | if (error < 0) |
845 | goto error; | |
846 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 847 | return clp; |
54ceac45 DH |
848 | |
849 | error: | |
850 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 851 | nfs_put_client(clp); |
54ceac45 | 852 | dprintk("<-- nfs_init_client() = xerror %d\n", error); |
8cab4c39 | 853 | return ERR_PTR(error); |
54ceac45 DH |
854 | } |
855 | ||
856 | /* | |
857 | * Create a version 2 or 3 client | |
858 | */ | |
2283f8d6 TT |
859 | static int nfs_init_server(struct nfs_server *server, |
860 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 861 | { |
3a498026 TM |
862 | struct nfs_client_initdata cl_init = { |
863 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 864 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 865 | .addrlen = data->nfs_server.addrlen, |
2ba68002 | 866 | .rpc_ops = NULL, |
59dca3b2 | 867 | .proto = data->nfs_server.protocol, |
e50a7a1a | 868 | .net = data->net, |
3a498026 | 869 | }; |
33170233 | 870 | struct rpc_timeout timeparms; |
54ceac45 | 871 | struct nfs_client *clp; |
3a498026 | 872 | int error; |
54ceac45 DH |
873 | |
874 | dprintk("--> nfs_init_server()\n"); | |
875 | ||
2ba68002 BS |
876 | switch (data->version) { |
877 | #ifdef CONFIG_NFS_V2 | |
878 | case 2: | |
879 | cl_init.rpc_ops = &nfs_v2_clientops; | |
880 | break; | |
881 | #endif | |
54ceac45 | 882 | #ifdef CONFIG_NFS_V3 |
2ba68002 | 883 | case 3: |
40c55319 | 884 | cl_init.rpc_ops = &nfs_v3_clientops; |
2ba68002 | 885 | break; |
54ceac45 | 886 | #endif |
2ba68002 BS |
887 | default: |
888 | return -EPROTONOSUPPORT; | |
889 | } | |
54ceac45 | 890 | |
45a52a02 AA |
891 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
892 | data->timeo, data->retrans); | |
4bf590e0 CL |
893 | if (data->flags & NFS_MOUNT_NORESVPORT) |
894 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
45a52a02 | 895 | |
54ceac45 | 896 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 897 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); |
54ceac45 DH |
898 | if (IS_ERR(clp)) { |
899 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
900 | return PTR_ERR(clp); | |
901 | } | |
902 | ||
54ceac45 DH |
903 | server->nfs_client = clp; |
904 | ||
905 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 906 | server->flags = data->flags; |
b797cac7 | 907 | server->options = data->options; |
62ab460c TM |
908 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
909 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
3a1556e8 | 910 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME|NFS_CAP_CHANGE_ATTR; |
54ceac45 DH |
911 | |
912 | if (data->rsize) | |
913 | server->rsize = nfs_block_size(data->rsize, NULL); | |
914 | if (data->wsize) | |
915 | server->wsize = nfs_block_size(data->wsize, NULL); | |
916 | ||
917 | server->acregmin = data->acregmin * HZ; | |
918 | server->acregmax = data->acregmax * HZ; | |
919 | server->acdirmin = data->acdirmin * HZ; | |
920 | server->acdirmax = data->acdirmax * HZ; | |
921 | ||
922 | /* Start lockd here, before we might error out */ | |
923 | error = nfs_start_lockd(server); | |
924 | if (error < 0) | |
925 | goto error; | |
926 | ||
f22d6d79 CL |
927 | server->port = data->nfs_server.port; |
928 | ||
33170233 | 929 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
930 | if (error < 0) |
931 | goto error; | |
932 | ||
3f8400d1 CL |
933 | /* Preserve the values of mount_server-related mount options */ |
934 | if (data->mount_server.addrlen) { | |
935 | memcpy(&server->mountd_address, &data->mount_server.address, | |
936 | data->mount_server.addrlen); | |
937 | server->mountd_addrlen = data->mount_server.addrlen; | |
938 | } | |
939 | server->mountd_version = data->mount_server.version; | |
940 | server->mountd_port = data->mount_server.port; | |
941 | server->mountd_protocol = data->mount_server.protocol; | |
942 | ||
54ceac45 DH |
943 | server->namelen = data->namlen; |
944 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
945 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
946 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
947 | return 0; | |
948 | ||
949 | error: | |
950 | server->nfs_client = NULL; | |
951 | nfs_put_client(clp); | |
952 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
953 | return error; | |
954 | } | |
955 | ||
956 | /* | |
957 | * Load up the server record from information gained in an fsinfo record | |
958 | */ | |
738fd0f3 BH |
959 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
960 | struct nfs_fh *mntfh, | |
961 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
962 | { |
963 | unsigned long max_rpc_payload; | |
964 | ||
965 | /* Work out a lot of parameters */ | |
966 | if (server->rsize == 0) | |
967 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
968 | if (server->wsize == 0) | |
969 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
970 | ||
971 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
972 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
973 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
974 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
975 | ||
976 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
977 | if (server->rsize > max_rpc_payload) | |
978 | server->rsize = max_rpc_payload; | |
979 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
980 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
981 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 982 | |
d993831f | 983 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
984 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
985 | ||
986 | if (server->wsize > max_rpc_payload) | |
987 | server->wsize = max_rpc_payload; | |
988 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
989 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
990 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 991 | server->pnfs_blksize = fsinfo->blksize; |
85e174ba | 992 | |
54ceac45 DH |
993 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
994 | ||
995 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
996 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
997 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
998 | if (server->dtsize > server->rsize) |
999 | server->dtsize = server->rsize; | |
1000 | ||
1001 | if (server->flags & NFS_MOUNT_NOAC) { | |
1002 | server->acregmin = server->acregmax = 0; | |
1003 | server->acdirmin = server->acdirmax = 0; | |
1004 | } | |
1005 | ||
1006 | server->maxfilesize = fsinfo->maxfilesize; | |
1007 | ||
6b96724e RL |
1008 | server->time_delta = fsinfo->time_delta; |
1009 | ||
54ceac45 DH |
1010 | /* We're airborne Set socket buffersize */ |
1011 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Probe filesystem information, including the FSID on v2/v3 | |
1016 | */ | |
1017 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
1018 | { | |
1019 | struct nfs_fsinfo fsinfo; | |
1020 | struct nfs_client *clp = server->nfs_client; | |
1021 | int error; | |
1022 | ||
1023 | dprintk("--> nfs_probe_fsinfo()\n"); | |
1024 | ||
1025 | if (clp->rpc_ops->set_capabilities != NULL) { | |
1026 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
1027 | if (error < 0) | |
1028 | goto out_error; | |
1029 | } | |
1030 | ||
1031 | fsinfo.fattr = fattr; | |
85e174ba | 1032 | fsinfo.layouttype = 0; |
54ceac45 DH |
1033 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
1034 | if (error < 0) | |
1035 | goto out_error; | |
1036 | ||
738fd0f3 | 1037 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
1038 | |
1039 | /* Get some general file system info */ | |
1040 | if (server->namelen == 0) { | |
1041 | struct nfs_pathconf pathinfo; | |
1042 | ||
1043 | pathinfo.fattr = fattr; | |
1044 | nfs_fattr_init(fattr); | |
1045 | ||
1046 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
1047 | server->namelen = pathinfo.max_namelen; | |
1048 | } | |
1049 | ||
1050 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
1051 | return 0; | |
1052 | ||
1053 | out_error: | |
1054 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
1055 | return error; | |
1056 | } | |
1057 | ||
1058 | /* | |
1059 | * Copy useful information when duplicating a server record | |
1060 | */ | |
1061 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
1062 | { | |
1063 | target->flags = source->flags; | |
356e76b8 CL |
1064 | target->rsize = source->rsize; |
1065 | target->wsize = source->wsize; | |
54ceac45 DH |
1066 | target->acregmin = source->acregmin; |
1067 | target->acregmax = source->acregmax; | |
1068 | target->acdirmin = source->acdirmin; | |
1069 | target->acdirmax = source->acdirmax; | |
1070 | target->caps = source->caps; | |
2df54806 | 1071 | target->options = source->options; |
54ceac45 DH |
1072 | } |
1073 | ||
fca5238e CL |
1074 | static void nfs_server_insert_lists(struct nfs_server *server) |
1075 | { | |
1076 | struct nfs_client *clp = server->nfs_client; | |
73ea666c | 1077 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
fca5238e | 1078 | |
dc030858 | 1079 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 1080 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); |
c25d32b2 | 1081 | list_add_tail(&server->master_link, &nn->nfs_volume_list); |
d3b4c9d7 | 1082 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
dc030858 | 1083 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
1084 | |
1085 | } | |
1086 | ||
1087 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1088 | { | |
d3b4c9d7 | 1089 | struct nfs_client *clp = server->nfs_client; |
4c03ae4a | 1090 | struct nfs_net *nn; |
d3b4c9d7 | 1091 | |
4c03ae4a TM |
1092 | if (clp == NULL) |
1093 | return; | |
73ea666c | 1094 | nn = net_generic(clp->cl_net, nfs_net_id); |
dc030858 | 1095 | spin_lock(&nn->nfs_client_lock); |
fca5238e | 1096 | list_del_rcu(&server->client_link); |
4c03ae4a | 1097 | if (list_empty(&clp->cl_superblocks)) |
d3b4c9d7 | 1098 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e | 1099 | list_del(&server->master_link); |
dc030858 | 1100 | spin_unlock(&nn->nfs_client_lock); |
fca5238e CL |
1101 | |
1102 | synchronize_rcu(); | |
1103 | } | |
1104 | ||
54ceac45 DH |
1105 | /* |
1106 | * Allocate and initialise a server record | |
1107 | */ | |
1108 | static struct nfs_server *nfs_alloc_server(void) | |
1109 | { | |
1110 | struct nfs_server *server; | |
1111 | ||
1112 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1113 | if (!server) | |
1114 | return NULL; | |
1115 | ||
1116 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1117 | ||
1118 | /* Zero out the NFS state stuff */ | |
1119 | INIT_LIST_HEAD(&server->client_link); | |
1120 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1121 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1122 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1123 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1124 | |
ef818a28 SD |
1125 | atomic_set(&server->active, 0); |
1126 | ||
54ceac45 DH |
1127 | server->io_stats = nfs_alloc_iostats(); |
1128 | if (!server->io_stats) { | |
1129 | kfree(server); | |
1130 | return NULL; | |
1131 | } | |
1132 | ||
48d07649 JA |
1133 | if (bdi_init(&server->backing_dev_info)) { |
1134 | nfs_free_iostats(server->io_stats); | |
1135 | kfree(server); | |
1136 | return NULL; | |
1137 | } | |
1138 | ||
9157c31d | 1139 | ida_init(&server->openowner_id); |
d2d7ce28 | 1140 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1141 | pnfs_init_server(server); |
1142 | ||
54ceac45 DH |
1143 | return server; |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Free up a server record | |
1148 | */ | |
1149 | void nfs_free_server(struct nfs_server *server) | |
1150 | { | |
1151 | dprintk("--> nfs_free_server()\n"); | |
1152 | ||
fca5238e | 1153 | nfs_server_remove_lists(server); |
54ceac45 DH |
1154 | |
1155 | if (server->destroy != NULL) | |
1156 | server->destroy(server); | |
5cef338b TM |
1157 | |
1158 | if (!IS_ERR(server->client_acl)) | |
1159 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1160 | if (!IS_ERR(server->client)) |
1161 | rpc_shutdown_client(server->client); | |
1162 | ||
1163 | nfs_put_client(server->nfs_client); | |
1164 | ||
d2d7ce28 | 1165 | ida_destroy(&server->lockowner_id); |
9157c31d | 1166 | ida_destroy(&server->openowner_id); |
54ceac45 | 1167 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1168 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1169 | kfree(server); |
1170 | nfs_release_automount_timer(); | |
1171 | dprintk("<-- nfs_free_server()\n"); | |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | * Create a version 2 or 3 volume record | |
1176 | * - keyed on server and FSID | |
1177 | */ | |
2283f8d6 | 1178 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1179 | struct nfs_fh *mntfh) |
1180 | { | |
1181 | struct nfs_server *server; | |
fbca779a | 1182 | struct nfs_fattr *fattr; |
54ceac45 DH |
1183 | int error; |
1184 | ||
1185 | server = nfs_alloc_server(); | |
1186 | if (!server) | |
1187 | return ERR_PTR(-ENOMEM); | |
1188 | ||
fbca779a TM |
1189 | error = -ENOMEM; |
1190 | fattr = nfs_alloc_fattr(); | |
1191 | if (fattr == NULL) | |
1192 | goto error; | |
1193 | ||
54ceac45 DH |
1194 | /* Get a client representation */ |
1195 | error = nfs_init_server(server, data); | |
1196 | if (error < 0) | |
1197 | goto error; | |
1198 | ||
1199 | BUG_ON(!server->nfs_client); | |
1200 | BUG_ON(!server->nfs_client->rpc_ops); | |
1201 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1202 | ||
1203 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1204 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1205 | if (error < 0) |
1206 | goto error; | |
54af3bb5 TM |
1207 | if (server->nfs_client->rpc_ops->version == 3) { |
1208 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1209 | server->namelen = NFS3_MAXNAMLEN; | |
1210 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1211 | server->caps |= NFS_CAP_READDIRPLUS; | |
1212 | } else { | |
1213 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1214 | server->namelen = NFS2_MAXNAMLEN; | |
1215 | } | |
1216 | ||
fbca779a TM |
1217 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1218 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1219 | if (error < 0) { |
1220 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1221 | goto error; | |
1222 | } | |
1223 | } | |
fbca779a | 1224 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1225 | |
6daabf1b DH |
1226 | dprintk("Server FSID: %llx:%llx\n", |
1227 | (unsigned long long) server->fsid.major, | |
1228 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1229 | |
fca5238e | 1230 | nfs_server_insert_lists(server); |
54ceac45 | 1231 | server->mount_time = jiffies; |
fbca779a | 1232 | nfs_free_fattr(fattr); |
54ceac45 DH |
1233 | return server; |
1234 | ||
1235 | error: | |
fbca779a | 1236 | nfs_free_fattr(fattr); |
54ceac45 DH |
1237 | nfs_free_server(server); |
1238 | return ERR_PTR(error); | |
1239 | } | |
1240 | ||
1241 | #ifdef CONFIG_NFS_V4 | |
c36fca52 AA |
1242 | /* |
1243 | * NFSv4.0 callback thread helper | |
1244 | * | |
1245 | * Find a client by callback identifier | |
1246 | */ | |
1247 | struct nfs_client * | |
28cd1b3f | 1248 | nfs4_find_client_ident(struct net *net, int cb_ident) |
c36fca52 AA |
1249 | { |
1250 | struct nfs_client *clp; | |
28cd1b3f | 1251 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
c36fca52 | 1252 | |
dc030858 | 1253 | spin_lock(&nn->nfs_client_lock); |
28cd1b3f | 1254 | clp = idr_find(&nn->cb_ident_idr, cb_ident); |
c36fca52 AA |
1255 | if (clp) |
1256 | atomic_inc(&clp->cl_count); | |
dc030858 | 1257 | spin_unlock(&nn->nfs_client_lock); |
c36fca52 AA |
1258 | return clp; |
1259 | } | |
1260 | ||
1261 | #if defined(CONFIG_NFS_V4_1) | |
1262 | /* | |
1263 | * NFSv4.1 callback thread helper | |
1264 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1265 | * minorversion, and sessionID | |
1266 | * | |
c36fca52 AA |
1267 | * Returns NULL if no such client |
1268 | */ | |
1269 | struct nfs_client * | |
c7add9a9 | 1270 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, |
778be232 | 1271 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1272 | { |
1273 | struct nfs_client *clp; | |
c7add9a9 | 1274 | struct nfs_net *nn = net_generic(net, nfs_net_id); |
c36fca52 | 1275 | |
dc030858 | 1276 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1277 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
c36fca52 AA |
1278 | if (nfs4_cb_match_client(addr, clp, 1) == false) |
1279 | continue; | |
1280 | ||
1281 | if (!nfs4_has_session(clp)) | |
1282 | continue; | |
1283 | ||
778be232 AA |
1284 | /* Match sessionid*/ |
1285 | if (memcmp(clp->cl_session->sess_id.data, | |
1286 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
c36fca52 AA |
1287 | continue; |
1288 | ||
1289 | atomic_inc(&clp->cl_count); | |
dc030858 | 1290 | spin_unlock(&nn->nfs_client_lock); |
c36fca52 AA |
1291 | return clp; |
1292 | } | |
dc030858 | 1293 | spin_unlock(&nn->nfs_client_lock); |
c36fca52 AA |
1294 | return NULL; |
1295 | } | |
1296 | ||
1297 | #else /* CONFIG_NFS_V4_1 */ | |
1298 | ||
1299 | struct nfs_client * | |
b6d1e83b | 1300 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, |
778be232 | 1301 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1302 | { |
1303 | return NULL; | |
1304 | } | |
1305 | #endif /* CONFIG_NFS_V4_1 */ | |
1306 | ||
9bdaa86d BH |
1307 | /* |
1308 | * Initialize the NFS4 callback service | |
1309 | */ | |
1310 | static int nfs4_init_callback(struct nfs_client *clp) | |
1311 | { | |
1312 | int error; | |
1313 | ||
1314 | if (clp->rpc_ops->version == 4) { | |
2446ab60 TM |
1315 | struct rpc_xprt *xprt; |
1316 | ||
1317 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); | |
1318 | ||
0b5b7ae0 | 1319 | if (nfs4_has_session(clp)) { |
2446ab60 | 1320 | error = xprt_setup_backchannel(xprt, |
0b5b7ae0 AA |
1321 | NFS41_BC_MIN_CALLBACKS); |
1322 | if (error < 0) | |
1323 | return error; | |
1324 | } | |
1325 | ||
2446ab60 | 1326 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); |
9bdaa86d BH |
1327 | if (error < 0) { |
1328 | dprintk("%s: failed to start callback. Error = %d\n", | |
1329 | __func__, error); | |
1330 | return error; | |
1331 | } | |
1332 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1333 | } | |
1334 | return 0; | |
1335 | } | |
1336 | ||
557134a3 AA |
1337 | /* |
1338 | * Initialize the minor version specific parts of an NFS4 client record | |
1339 | */ | |
1340 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1341 | { | |
1342 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1343 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1344 | struct nfs4_session *session = NULL; |
1345 | /* | |
1346 | * Create the session and mark it expired. | |
1347 | * When a SEQUENCE operation encounters the expired session | |
1348 | * it will do session recovery to initialize it. | |
1349 | */ | |
1350 | session = nfs4_alloc_session(clp); | |
1351 | if (!session) | |
1352 | return -ENOMEM; | |
1353 | ||
1354 | clp->cl_session = session; | |
fe74ba3a TM |
1355 | /* |
1356 | * The create session reply races with the server back | |
1357 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1358 | * so that the client back channel can find the | |
1359 | * nfs_client struct | |
1360 | */ | |
4697bd5e | 1361 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); |
557134a3 AA |
1362 | } |
1363 | #endif /* CONFIG_NFS_V4_1 */ | |
1364 | ||
71468513 | 1365 | return nfs4_init_callback(clp); |
557134a3 AA |
1366 | } |
1367 | ||
8cab4c39 CL |
1368 | /** |
1369 | * nfs4_init_client - Initialise an NFS4 client record | |
1370 | * | |
1371 | * @clp: nfs_client to initialise | |
1372 | * @timeparms: timeout parameters for underlying RPC transport | |
1373 | * @ip_addr: callback IP address in presentation format | |
1374 | * @authflavor: authentication flavor for underlying RPC transport | |
8cab4c39 CL |
1375 | * |
1376 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
54ceac45 | 1377 | */ |
8cab4c39 CL |
1378 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
1379 | const struct rpc_timeout *timeparms, | |
1380 | const char *ip_addr, | |
4bf590e0 | 1381 | rpc_authflavor_t authflavour) |
54ceac45 | 1382 | { |
31b8e2ae | 1383 | char buf[INET6_ADDRSTRLEN + 1]; |
54ceac45 DH |
1384 | int error; |
1385 | ||
1386 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1387 | /* the client is initialised already */ | |
1388 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
8cab4c39 | 1389 | return clp; |
54ceac45 DH |
1390 | } |
1391 | ||
1392 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1393 | clp->rpc_ops = &nfs_v4_clientops; | |
1394 | ||
4bf590e0 CL |
1395 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
1396 | error = nfs_create_rpc_client(clp, timeparms, authflavour); | |
54ceac45 DH |
1397 | if (error < 0) |
1398 | goto error; | |
31b8e2ae CL |
1399 | |
1400 | /* If no clientaddr= option was specified, find a usable cb address */ | |
1401 | if (ip_addr == NULL) { | |
1402 | struct sockaddr_storage cb_addr; | |
1403 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
1404 | ||
1405 | error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
1406 | if (error < 0) | |
1407 | goto error; | |
1408 | error = rpc_ntop(sap, buf, sizeof(buf)); | |
1409 | if (error < 0) | |
1410 | goto error; | |
1411 | ip_addr = (const char *)buf; | |
1412 | } | |
f4373bf9 | 1413 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1414 | |
1415 | error = nfs_idmap_new(clp); | |
1416 | if (error < 0) { | |
1417 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1418 | __func__, error); |
54ceac45 DH |
1419 | goto error; |
1420 | } | |
9c5bf38d | 1421 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1422 | |
557134a3 AA |
1423 | error = nfs4_init_client_minor_version(clp); |
1424 | if (error < 0) | |
1425 | goto error; | |
1426 | ||
76db6d95 AA |
1427 | if (!nfs4_has_session(clp)) |
1428 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
8cab4c39 | 1429 | return clp; |
54ceac45 DH |
1430 | |
1431 | error: | |
1432 | nfs_mark_client_ready(clp, error); | |
8cab4c39 | 1433 | nfs_put_client(clp); |
54ceac45 | 1434 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); |
8cab4c39 | 1435 | return ERR_PTR(error); |
54ceac45 DH |
1436 | } |
1437 | ||
1438 | /* | |
1439 | * Set up an NFS4 client | |
1440 | */ | |
1441 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1442 | const char *hostname, |
1443 | const struct sockaddr *addr, | |
1444 | const size_t addrlen, | |
7d9ac06f | 1445 | const char *ip_addr, |
54ceac45 | 1446 | rpc_authflavor_t authflavour, |
94a417f3 | 1447 | int proto, const struct rpc_timeout *timeparms, |
e50a7a1a | 1448 | u32 minorversion, struct net *net) |
54ceac45 | 1449 | { |
3a498026 TM |
1450 | struct nfs_client_initdata cl_init = { |
1451 | .hostname = hostname, | |
dcecae0f CL |
1452 | .addr = addr, |
1453 | .addrlen = addrlen, | |
40c55319 | 1454 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1455 | .proto = proto, |
5aae4a9a | 1456 | .minorversion = minorversion, |
e50a7a1a | 1457 | .net = net, |
3a498026 | 1458 | }; |
54ceac45 DH |
1459 | struct nfs_client *clp; |
1460 | int error; | |
1461 | ||
1462 | dprintk("--> nfs4_set_client()\n"); | |
1463 | ||
4bf590e0 CL |
1464 | if (server->flags & NFS_MOUNT_NORESVPORT) |
1465 | set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
1466 | ||
54ceac45 | 1467 | /* Allocate or find a client reference we can use */ |
4bf590e0 | 1468 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour); |
54ceac45 DH |
1469 | if (IS_ERR(clp)) { |
1470 | error = PTR_ERR(clp); | |
1471 | goto error; | |
1472 | } | |
54ceac45 | 1473 | |
d6fb79d4 AA |
1474 | /* |
1475 | * Query for the lease time on clientid setup or renewal | |
1476 | * | |
1477 | * Note that this will be set on nfs_clients that were created | |
1478 | * only for the DS role and did not set this bit, but now will | |
1479 | * serve a dual role. | |
1480 | */ | |
1481 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
1482 | ||
54ceac45 DH |
1483 | server->nfs_client = clp; |
1484 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1485 | return 0; | |
54ceac45 DH |
1486 | error: |
1487 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1488 | return error; | |
1489 | } | |
1490 | ||
d83217c1 AA |
1491 | /* |
1492 | * Set up a pNFS Data Server client. | |
1493 | * | |
1494 | * Return any existing nfs_client that matches server address,port,version | |
1495 | * and minorversion. | |
1496 | * | |
1497 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
1498 | * low timeout interval so that if a connection is lost, we retry through | |
1499 | * the MDS. | |
1500 | */ | |
1501 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
98fc685a AA |
1502 | const struct sockaddr *ds_addr, int ds_addrlen, |
1503 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) | |
d83217c1 AA |
1504 | { |
1505 | struct nfs_client_initdata cl_init = { | |
1506 | .addr = ds_addr, | |
1507 | .addrlen = ds_addrlen, | |
1508 | .rpc_ops = &nfs_v4_clientops, | |
1509 | .proto = ds_proto, | |
1510 | .minorversion = mds_clp->cl_minorversion, | |
73ea666c | 1511 | .net = mds_clp->cl_net, |
d83217c1 | 1512 | }; |
98fc685a | 1513 | struct rpc_timeout ds_timeout; |
d83217c1 AA |
1514 | struct nfs_client *clp; |
1515 | ||
1516 | /* | |
1517 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1518 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1519 | * (section 13.1 RFC 5661). | |
1520 | */ | |
98fc685a | 1521 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); |
d83217c1 | 1522 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, |
4bf590e0 | 1523 | mds_clp->cl_rpcclient->cl_auth->au_flavor); |
d83217c1 AA |
1524 | |
1525 | dprintk("<-- %s %p\n", __func__, clp); | |
1526 | return clp; | |
1527 | } | |
94b134ac | 1528 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); |
557134a3 | 1529 | |
96b09e02 AA |
1530 | /* |
1531 | * Session has been established, and the client marked ready. | |
1532 | * Set the mount rsize and wsize with negotiated fore channel | |
1533 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1534 | */ | |
1535 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1536 | { | |
1537 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1538 | struct nfs4_session *sess; |
1539 | u32 server_resp_sz; | |
1540 | u32 server_rqst_sz; | |
1541 | ||
96b09e02 AA |
1542 | if (!nfs4_has_session(server->nfs_client)) |
1543 | return; | |
2449ea2e AB |
1544 | sess = server->nfs_client->cl_session; |
1545 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1546 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1547 | ||
1548 | if (server->rsize > server_resp_sz) | |
1549 | server->rsize = server_resp_sz; | |
1550 | if (server->wsize > server_rqst_sz) | |
1551 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1552 | #endif /* CONFIG_NFS_V4_1 */ |
1553 | } | |
1554 | ||
44950b67 TM |
1555 | static int nfs4_server_common_setup(struct nfs_server *server, |
1556 | struct nfs_fh *mntfh) | |
1557 | { | |
1558 | struct nfs_fattr *fattr; | |
1559 | int error; | |
1560 | ||
1561 | BUG_ON(!server->nfs_client); | |
1562 | BUG_ON(!server->nfs_client->rpc_ops); | |
1563 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1564 | ||
94de8b27 AA |
1565 | /* data servers support only a subset of NFSv4.1 */ |
1566 | if (is_ds_only_client(server->nfs_client)) | |
1567 | return -EPROTONOSUPPORT; | |
1568 | ||
44950b67 TM |
1569 | fattr = nfs_alloc_fattr(); |
1570 | if (fattr == NULL) | |
1571 | return -ENOMEM; | |
1572 | ||
1573 | /* We must ensure the session is initialised first */ | |
1574 | error = nfs4_init_session(server); | |
1575 | if (error < 0) | |
1576 | goto out; | |
1577 | ||
1578 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1579 | error = nfs4_get_rootfh(server, mntfh); | |
1580 | if (error < 0) | |
1581 | goto out; | |
1582 | ||
1583 | dprintk("Server FSID: %llx:%llx\n", | |
1584 | (unsigned long long) server->fsid.major, | |
1585 | (unsigned long long) server->fsid.minor); | |
1586 | dprintk("Mount FH: %d\n", mntfh->size); | |
1587 | ||
1588 | nfs4_session_set_rwsize(server); | |
1589 | ||
1590 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1591 | if (error < 0) | |
1592 | goto out; | |
1593 | ||
1594 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1595 | server->namelen = NFS4_MAXNAMLEN; | |
1596 | ||
fca5238e | 1597 | nfs_server_insert_lists(server); |
44950b67 | 1598 | server->mount_time = jiffies; |
0aaaf5c4 | 1599 | server->destroy = nfs4_destroy_server; |
44950b67 TM |
1600 | out: |
1601 | nfs_free_fattr(fattr); | |
1602 | return error; | |
1603 | } | |
1604 | ||
54ceac45 DH |
1605 | /* |
1606 | * Create a version 4 volume record | |
1607 | */ | |
1608 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1609 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1610 | { |
33170233 | 1611 | struct rpc_timeout timeparms; |
54ceac45 DH |
1612 | int error; |
1613 | ||
1614 | dprintk("--> nfs4_init_server()\n"); | |
1615 | ||
33170233 TM |
1616 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1617 | data->timeo, data->retrans); | |
1618 | ||
542fcc33 CL |
1619 | /* Initialise the client representation from the mount data */ |
1620 | server->flags = data->flags; | |
82f2e547 BS |
1621 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1622 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1623 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1624 | server->options = data->options; |
542fcc33 | 1625 | |
33170233 TM |
1626 | /* Get a client record */ |
1627 | error = nfs4_set_client(server, | |
1628 | data->nfs_server.hostname, | |
1629 | (const struct sockaddr *)&data->nfs_server.address, | |
1630 | data->nfs_server.addrlen, | |
1631 | data->client_address, | |
1632 | data->auth_flavors[0], | |
1633 | data->nfs_server.protocol, | |
94a417f3 | 1634 | &timeparms, |
e50a7a1a SK |
1635 | data->minorversion, |
1636 | data->net); | |
33170233 TM |
1637 | if (error < 0) |
1638 | goto error; | |
1639 | ||
b064eca2 TM |
1640 | /* |
1641 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1642 | * authentication. | |
1643 | */ | |
1644 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
1645 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1646 | ||
54ceac45 DH |
1647 | if (data->rsize) |
1648 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1649 | if (data->wsize) | |
1650 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1651 | ||
1652 | server->acregmin = data->acregmin * HZ; | |
1653 | server->acregmax = data->acregmax * HZ; | |
1654 | server->acdirmin = data->acdirmin * HZ; | |
1655 | server->acdirmax = data->acdirmax * HZ; | |
1656 | ||
f22d6d79 CL |
1657 | server->port = data->nfs_server.port; |
1658 | ||
33170233 | 1659 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1660 | |
33170233 | 1661 | error: |
54ceac45 DH |
1662 | /* Done */ |
1663 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1664 | return error; | |
1665 | } | |
1666 | ||
1667 | /* | |
1668 | * Create a version 4 volume record | |
1669 | * - keyed on server and FSID | |
1670 | */ | |
91ea40b9 | 1671 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1672 | struct nfs_fh *mntfh) |
1673 | { | |
54ceac45 DH |
1674 | struct nfs_server *server; |
1675 | int error; | |
1676 | ||
1677 | dprintk("--> nfs4_create_server()\n"); | |
1678 | ||
1679 | server = nfs_alloc_server(); | |
1680 | if (!server) | |
1681 | return ERR_PTR(-ENOMEM); | |
1682 | ||
54ceac45 | 1683 | /* set up the general RPC client */ |
91ea40b9 | 1684 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1685 | if (error < 0) |
1686 | goto error; | |
1687 | ||
44950b67 | 1688 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1689 | if (error < 0) |
1690 | goto error; | |
1691 | ||
54ceac45 DH |
1692 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1693 | return server; | |
1694 | ||
1695 | error: | |
1696 | nfs_free_server(server); | |
1697 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1698 | return ERR_PTR(error); | |
1699 | } | |
1700 | ||
1701 | /* | |
1702 | * Create an NFS4 referral server record | |
1703 | */ | |
1704 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1705 | struct nfs_fh *mntfh) |
54ceac45 DH |
1706 | { |
1707 | struct nfs_client *parent_client; | |
1708 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1709 | int error; |
1710 | ||
1711 | dprintk("--> nfs4_create_referral_server()\n"); | |
1712 | ||
1713 | server = nfs_alloc_server(); | |
1714 | if (!server) | |
1715 | return ERR_PTR(-ENOMEM); | |
1716 | ||
1717 | parent_server = NFS_SB(data->sb); | |
1718 | parent_client = parent_server->nfs_client; | |
1719 | ||
542fcc33 CL |
1720 | /* Initialise the client representation from the parent server */ |
1721 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1722 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1723 | |
54ceac45 DH |
1724 | /* Get a client representation. |
1725 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1726 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1727 | data->addr, |
1728 | data->addrlen, | |
dcecae0f CL |
1729 | parent_client->cl_ipaddr, |
1730 | data->authflavor, | |
2446ab60 | 1731 | rpc_protocol(parent_server->client), |
94a417f3 | 1732 | parent_server->client->cl_timeout, |
e50a7a1a | 1733 | parent_client->cl_mvops->minor_version, |
73ea666c | 1734 | parent_client->cl_net); |
297de4f6 AA |
1735 | if (error < 0) |
1736 | goto error; | |
54ceac45 | 1737 | |
33170233 | 1738 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1739 | if (error < 0) |
1740 | goto error; | |
1741 | ||
44950b67 | 1742 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1743 | if (error < 0) |
1744 | goto error; | |
1745 | ||
54ceac45 DH |
1746 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1747 | return server; | |
1748 | ||
1749 | error: | |
1750 | nfs_free_server(server); | |
1751 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1752 | return ERR_PTR(error); | |
1753 | } | |
1754 | ||
1755 | #endif /* CONFIG_NFS_V4 */ | |
1756 | ||
1757 | /* | |
1758 | * Clone an NFS2, NFS3 or NFS4 server record | |
1759 | */ | |
1760 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1761 | struct nfs_fh *fh, | |
7e6eb683 BS |
1762 | struct nfs_fattr *fattr, |
1763 | rpc_authflavor_t flavor) | |
54ceac45 DH |
1764 | { |
1765 | struct nfs_server *server; | |
fbca779a | 1766 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1767 | int error; |
1768 | ||
1769 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1770 | (unsigned long long) fattr->fsid.major, |
1771 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1772 | |
1773 | server = nfs_alloc_server(); | |
1774 | if (!server) | |
1775 | return ERR_PTR(-ENOMEM); | |
1776 | ||
fbca779a TM |
1777 | error = -ENOMEM; |
1778 | fattr_fsinfo = nfs_alloc_fattr(); | |
1779 | if (fattr_fsinfo == NULL) | |
1780 | goto out_free_server; | |
1781 | ||
54ceac45 DH |
1782 | /* Copy data from the source */ |
1783 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1784 | server->destroy = source->destroy; |
54ceac45 DH |
1785 | atomic_inc(&server->nfs_client->cl_count); |
1786 | nfs_server_copy_userdata(server, source); | |
1787 | ||
1788 | server->fsid = fattr->fsid; | |
1789 | ||
33170233 TM |
1790 | error = nfs_init_server_rpcclient(server, |
1791 | source->client->cl_timeout, | |
7e6eb683 | 1792 | flavor); |
54ceac45 DH |
1793 | if (error < 0) |
1794 | goto out_free_server; | |
1795 | if (!IS_ERR(source->client_acl)) | |
1796 | nfs_init_server_aclclient(server); | |
1797 | ||
1798 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1799 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1800 | if (error < 0) |
1801 | goto out_free_server; | |
1802 | ||
54af3bb5 TM |
1803 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1804 | server->namelen = NFS4_MAXNAMLEN; | |
1805 | ||
54ceac45 | 1806 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1807 | (unsigned long long) server->fsid.major, |
1808 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1809 | |
1810 | error = nfs_start_lockd(server); | |
1811 | if (error < 0) | |
1812 | goto out_free_server; | |
1813 | ||
fca5238e | 1814 | nfs_server_insert_lists(server); |
54ceac45 DH |
1815 | server->mount_time = jiffies; |
1816 | ||
fbca779a | 1817 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1818 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1819 | return server; | |
1820 | ||
1821 | out_free_server: | |
fbca779a | 1822 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1823 | nfs_free_server(server); |
1824 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1825 | return ERR_PTR(error); | |
1826 | } | |
6aaca566 | 1827 | |
6b13168b SK |
1828 | void nfs_clients_init(struct net *net) |
1829 | { | |
1830 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
1831 | ||
1832 | INIT_LIST_HEAD(&nn->nfs_client_list); | |
c25d32b2 | 1833 | INIT_LIST_HEAD(&nn->nfs_volume_list); |
28cd1b3f SK |
1834 | #ifdef CONFIG_NFS_V4 |
1835 | idr_init(&nn->cb_ident_idr); | |
1836 | #endif | |
4c03ae4a | 1837 | spin_lock_init(&nn->nfs_client_lock); |
f092075d | 1838 | nn->boot_time = CURRENT_TIME; |
6b13168b SK |
1839 | } |
1840 | ||
6aaca566 DH |
1841 | #ifdef CONFIG_PROC_FS |
1842 | static struct proc_dir_entry *proc_fs_nfs; | |
1843 | ||
1844 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1845 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1846 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1847 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1848 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1849 | ||
88e9d34c | 1850 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1851 | .start = nfs_server_list_start, |
1852 | .next = nfs_server_list_next, | |
1853 | .stop = nfs_server_list_stop, | |
1854 | .show = nfs_server_list_show, | |
1855 | }; | |
1856 | ||
00977a59 | 1857 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1858 | .open = nfs_server_list_open, |
1859 | .read = seq_read, | |
1860 | .llseek = seq_lseek, | |
1861 | .release = seq_release, | |
34b37235 | 1862 | .owner = THIS_MODULE, |
6aaca566 DH |
1863 | }; |
1864 | ||
1865 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1866 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1867 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1868 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1869 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1870 | ||
88e9d34c | 1871 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1872 | .start = nfs_volume_list_start, |
1873 | .next = nfs_volume_list_next, | |
1874 | .stop = nfs_volume_list_stop, | |
1875 | .show = nfs_volume_list_show, | |
1876 | }; | |
1877 | ||
00977a59 | 1878 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1879 | .open = nfs_volume_list_open, |
1880 | .read = seq_read, | |
1881 | .llseek = seq_lseek, | |
1882 | .release = seq_release, | |
34b37235 | 1883 | .owner = THIS_MODULE, |
6aaca566 DH |
1884 | }; |
1885 | ||
1886 | /* | |
1887 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1888 | * we're dealing | |
1889 | */ | |
1890 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1891 | { | |
1892 | struct seq_file *m; | |
1893 | int ret; | |
6b13168b SK |
1894 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1895 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1896 | |
1897 | ret = seq_open(file, &nfs_server_list_ops); | |
1898 | if (ret < 0) | |
1899 | return ret; | |
1900 | ||
1901 | m = file->private_data; | |
6b13168b | 1902 | m->private = net; |
6aaca566 DH |
1903 | |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | /* | |
1908 | * set up the iterator to start reading from the server list and return the first item | |
1909 | */ | |
1910 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1911 | { | |
6b13168b SK |
1912 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1913 | ||
6aaca566 | 1914 | /* lock the list against modification */ |
dc030858 | 1915 | spin_lock(&nn->nfs_client_lock); |
6b13168b | 1916 | return seq_list_start_head(&nn->nfs_client_list, *_pos); |
6aaca566 DH |
1917 | } |
1918 | ||
1919 | /* | |
1920 | * move to next server | |
1921 | */ | |
1922 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1923 | { | |
6b13168b SK |
1924 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1925 | ||
1926 | return seq_list_next(v, &nn->nfs_client_list, pos); | |
6aaca566 DH |
1927 | } |
1928 | ||
1929 | /* | |
1930 | * clean up after reading from the transports list | |
1931 | */ | |
1932 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1933 | { | |
dc030858 SK |
1934 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
1935 | ||
1936 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
1937 | } |
1938 | ||
1939 | /* | |
1940 | * display a header line followed by a load of call lines | |
1941 | */ | |
1942 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1943 | { | |
1944 | struct nfs_client *clp; | |
6b13168b | 1945 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
1946 | |
1947 | /* display header on line 1 */ | |
6b13168b | 1948 | if (v == &nn->nfs_client_list) { |
6aaca566 DH |
1949 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | /* display one transport per line on subsequent lines */ | |
1954 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1955 | ||
940aab49 MN |
1956 | /* Check if the client is initialized */ |
1957 | if (clp->cl_cons_state != NFS_CS_READY) | |
1958 | return 0; | |
1959 | ||
2446ab60 | 1960 | rcu_read_lock(); |
5d8515ca | 1961 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1962 | clp->rpc_ops->version, |
5d8515ca CL |
1963 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1964 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1965 | atomic_read(&clp->cl_count), |
1966 | clp->cl_hostname); | |
2446ab60 | 1967 | rcu_read_unlock(); |
6aaca566 DH |
1968 | |
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | /* | |
1973 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1974 | */ | |
1975 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1976 | { | |
1977 | struct seq_file *m; | |
1978 | int ret; | |
c25d32b2 SK |
1979 | struct pid_namespace *pid_ns = file->f_dentry->d_sb->s_fs_info; |
1980 | struct net *net = pid_ns->child_reaper->nsproxy->net_ns; | |
6aaca566 DH |
1981 | |
1982 | ret = seq_open(file, &nfs_volume_list_ops); | |
1983 | if (ret < 0) | |
1984 | return ret; | |
1985 | ||
1986 | m = file->private_data; | |
c25d32b2 | 1987 | m->private = net; |
6aaca566 DH |
1988 | |
1989 | return 0; | |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * set up the iterator to start reading from the volume list and return the first item | |
1994 | */ | |
1995 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1996 | { | |
c25d32b2 SK |
1997 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
1998 | ||
6aaca566 | 1999 | /* lock the list against modification */ |
dc030858 | 2000 | spin_lock(&nn->nfs_client_lock); |
c25d32b2 | 2001 | return seq_list_start_head(&nn->nfs_volume_list, *_pos); |
6aaca566 DH |
2002 | } |
2003 | ||
2004 | /* | |
2005 | * move to next volume | |
2006 | */ | |
2007 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
2008 | { | |
c25d32b2 SK |
2009 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
2010 | ||
2011 | return seq_list_next(v, &nn->nfs_volume_list, pos); | |
6aaca566 DH |
2012 | } |
2013 | ||
2014 | /* | |
2015 | * clean up after reading from the transports list | |
2016 | */ | |
2017 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
2018 | { | |
dc030858 SK |
2019 | struct nfs_net *nn = net_generic(p->private, nfs_net_id); |
2020 | ||
2021 | spin_unlock(&nn->nfs_client_lock); | |
6aaca566 DH |
2022 | } |
2023 | ||
2024 | /* | |
2025 | * display a header line followed by a load of call lines | |
2026 | */ | |
2027 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
2028 | { | |
2029 | struct nfs_server *server; | |
2030 | struct nfs_client *clp; | |
2031 | char dev[8], fsid[17]; | |
c25d32b2 | 2032 | struct nfs_net *nn = net_generic(m->private, nfs_net_id); |
6aaca566 DH |
2033 | |
2034 | /* display header on line 1 */ | |
c25d32b2 | 2035 | if (v == &nn->nfs_volume_list) { |
5d1acff1 | 2036 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
2037 | return 0; |
2038 | } | |
2039 | /* display one transport per line on subsequent lines */ | |
2040 | server = list_entry(v, struct nfs_server, master_link); | |
2041 | clp = server->nfs_client; | |
2042 | ||
2043 | snprintf(dev, 8, "%u:%u", | |
2044 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
2045 | ||
2046 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
2047 | (unsigned long long) server->fsid.major, |
2048 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 2049 | |
2446ab60 | 2050 | rcu_read_lock(); |
5d1acff1 | 2051 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 2052 | clp->rpc_ops->version, |
5d8515ca CL |
2053 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
2054 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 2055 | dev, |
5d1acff1 DH |
2056 | fsid, |
2057 | nfs_server_fscache_state(server)); | |
2446ab60 | 2058 | rcu_read_unlock(); |
6aaca566 DH |
2059 | |
2060 | return 0; | |
2061 | } | |
2062 | ||
2063 | /* | |
2064 | * initialise the /proc/fs/nfsfs/ directory | |
2065 | */ | |
2066 | int __init nfs_fs_proc_init(void) | |
2067 | { | |
2068 | struct proc_dir_entry *p; | |
2069 | ||
36a5aeb8 | 2070 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
2071 | if (!proc_fs_nfs) |
2072 | goto error_0; | |
2073 | ||
6aaca566 | 2074 | /* a file of servers with which we're dealing */ |
34b37235 DL |
2075 | p = proc_create("servers", S_IFREG|S_IRUGO, |
2076 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
2077 | if (!p) |
2078 | goto error_1; | |
2079 | ||
6aaca566 | 2080 | /* a file of volumes that we have mounted */ |
34b37235 DL |
2081 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
2082 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
2083 | if (!p) |
2084 | goto error_2; | |
6aaca566 DH |
2085 | return 0; |
2086 | ||
2087 | error_2: | |
2088 | remove_proc_entry("servers", proc_fs_nfs); | |
2089 | error_1: | |
36a5aeb8 | 2090 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
2091 | error_0: |
2092 | return -ENOMEM; | |
2093 | } | |
2094 | ||
2095 | /* | |
2096 | * clean up the /proc/fs/nfsfs/ directory | |
2097 | */ | |
2098 | void nfs_fs_proc_exit(void) | |
2099 | { | |
2100 | remove_proc_entry("volumes", proc_fs_nfs); | |
2101 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 2102 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
2103 | } |
2104 | ||
2105 | #endif /* CONFIG_PROC_FS */ | |
b064eca2 TM |
2106 | |
2107 | module_param(nfs4_disable_idmapping, bool, 0644); | |
2108 | MODULE_PARM_DESC(nfs4_disable_idmapping, | |
2109 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |