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Commit | Line | Data |
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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> |
3b0d3f93 | 39 | #include <net/ipv6.h> |
24c8dbbb | 40 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 41 | #include <linux/sunrpc/bc_xprt.h> |
24c8dbbb DH |
42 | |
43 | #include <asm/system.h> | |
44 | ||
45 | #include "nfs4_fs.h" | |
46 | #include "callback.h" | |
47 | #include "delegation.h" | |
48 | #include "iostat.h" | |
49 | #include "internal.h" | |
14727281 | 50 | #include "fscache.h" |
85e174ba | 51 | #include "pnfs.h" |
24c8dbbb DH |
52 | |
53 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
54 | ||
eee17325 SK |
55 | DEFINE_SPINLOCK(nfs_client_lock); |
56 | LIST_HEAD(nfs_client_list); | |
54ceac45 | 57 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb | 58 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
f4eecd5d AA |
59 | #ifdef CONFIG_NFS_V4 |
60 | static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */ | |
61 | ||
62 | /* | |
63 | * Get a unique NFSv4.0 callback identifier which will be used | |
64 | * by the V4.0 callback service to lookup the nfs_client struct | |
65 | */ | |
66 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
67 | { | |
68 | int ret = 0; | |
69 | ||
70 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
71 | return ret; | |
72 | retry: | |
73 | if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL)) | |
74 | return -ENOMEM; | |
75 | spin_lock(&nfs_client_lock); | |
76 | ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident); | |
77 | spin_unlock(&nfs_client_lock); | |
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] = { |
5006a76c DH |
93 | [2] = &nfs_version2, |
94 | #ifdef CONFIG_NFS_V3 | |
95 | [3] = &nfs_version3, | |
96 | #endif | |
97 | #ifdef CONFIG_NFS_V4 | |
98 | [4] = &nfs_version4, | |
99 | #endif | |
100 | }; | |
101 | ||
a613fa16 | 102 | const struct rpc_program nfs_program = { |
5006a76c DH |
103 | .name = "nfs", |
104 | .number = NFS_PROGRAM, | |
105 | .nrvers = ARRAY_SIZE(nfs_version), | |
106 | .version = nfs_version, | |
107 | .stats = &nfs_rpcstat, | |
fe0a9b74 | 108 | .pipe_dir_name = NFS_PIPE_DIRNAME, |
5006a76c DH |
109 | }; |
110 | ||
111 | struct rpc_stat nfs_rpcstat = { | |
112 | .program = &nfs_program | |
113 | }; | |
114 | ||
115 | ||
116 | #ifdef CONFIG_NFS_V3_ACL | |
117 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
a613fa16 | 118 | static const struct rpc_version *nfsacl_version[] = { |
5006a76c DH |
119 | [3] = &nfsacl_version3, |
120 | }; | |
121 | ||
a613fa16 | 122 | const struct rpc_program nfsacl_program = { |
5006a76c DH |
123 | .name = "nfsacl", |
124 | .number = NFS_ACL_PROGRAM, | |
125 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
126 | .version = nfsacl_version, | |
127 | .stats = &nfsacl_rpcstat, | |
128 | }; | |
129 | #endif /* CONFIG_NFS_V3_ACL */ | |
130 | ||
3a498026 TM |
131 | struct nfs_client_initdata { |
132 | const char *hostname; | |
d7422c47 | 133 | const struct sockaddr *addr; |
6e4cffd7 | 134 | size_t addrlen; |
40c55319 | 135 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 136 | int proto; |
5aae4a9a | 137 | u32 minorversion; |
e50a7a1a | 138 | struct net *net; |
3a498026 TM |
139 | }; |
140 | ||
24c8dbbb DH |
141 | /* |
142 | * Allocate a shared client record | |
143 | * | |
144 | * Since these are allocated/deallocated very rarely, we don't | |
145 | * bother putting them in a slab cache... | |
146 | */ | |
3a498026 | 147 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
148 | { |
149 | struct nfs_client *clp; | |
7c67db3a | 150 | struct rpc_cred *cred; |
a21bdd9b | 151 | int err = -ENOMEM; |
24c8dbbb DH |
152 | |
153 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
154 | goto error_0; | |
155 | ||
40c55319 TM |
156 | clp->rpc_ops = cl_init->rpc_ops; |
157 | ||
24c8dbbb DH |
158 | atomic_set(&clp->cl_count, 1); |
159 | clp->cl_cons_state = NFS_CS_INITING; | |
160 | ||
6e4cffd7 CL |
161 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
162 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 163 | |
3a498026 | 164 | if (cl_init->hostname) { |
a21bdd9b | 165 | err = -ENOMEM; |
3a498026 | 166 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 167 | if (!clp->cl_hostname) |
71468513 | 168 | goto error_cleanup; |
24c8dbbb DH |
169 | } |
170 | ||
171 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
172 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
173 | ||
59dca3b2 TM |
174 | clp->cl_proto = cl_init->proto; |
175 | ||
24c8dbbb | 176 | #ifdef CONFIG_NFS_V4 |
f4eecd5d AA |
177 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); |
178 | if (err) | |
179 | goto error_cleanup; | |
180 | ||
24c8dbbb | 181 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 182 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
183 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
184 | clp->cl_boot_time = CURRENT_TIME; | |
185 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
5aae4a9a | 186 | clp->cl_minorversion = cl_init->minorversion; |
97dc1359 | 187 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
24c8dbbb | 188 | #endif |
68c97153 | 189 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
190 | if (!IS_ERR(cred)) |
191 | clp->cl_machine_cred = cred; | |
14727281 | 192 | nfs_fscache_get_client_cookie(clp); |
e50a7a1a | 193 | clp->net = cl_init->net; |
14727281 | 194 | |
24c8dbbb DH |
195 | return clp; |
196 | ||
71468513 | 197 | error_cleanup: |
24c8dbbb DH |
198 | kfree(clp); |
199 | error_0: | |
a21bdd9b | 200 | return ERR_PTR(err); |
24c8dbbb DH |
201 | } |
202 | ||
5dd3177a | 203 | #ifdef CONFIG_NFS_V4 |
557134a3 | 204 | #ifdef CONFIG_NFS_V4_1 |
ea005281 AA |
205 | static void nfs4_shutdown_session(struct nfs_client *clp) |
206 | { | |
207 | if (nfs4_has_session(clp)) | |
557134a3 | 208 | nfs4_destroy_session(clp->cl_session); |
888ef2e3 | 209 | } |
ea005281 AA |
210 | #else /* CONFIG_NFS_V4_1 */ |
211 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
212 | { | |
213 | } | |
214 | #endif /* CONFIG_NFS_V4_1 */ | |
71468513 | 215 | |
888ef2e3 AB |
216 | /* |
217 | * Destroy the NFS4 callback service | |
218 | */ | |
219 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
220 | { | |
221 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 222 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
223 | } |
224 | ||
225 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
226 | { | |
227 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
228 | nfs4_kill_renewd(clp); | |
ea005281 | 229 | nfs4_shutdown_session(clp); |
71468513 | 230 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
231 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
232 | nfs_idmap_delete(clp); | |
233 | ||
234 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
557134a3 | 235 | } |
f4eecd5d AA |
236 | |
237 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ | |
238 | void nfs_cleanup_cb_ident_idr(void) | |
239 | { | |
240 | idr_destroy(&cb_ident_idr); | |
241 | } | |
242 | ||
243 | /* nfs_client_lock held */ | |
244 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
245 | { | |
246 | if (clp->cl_cb_ident) | |
247 | idr_remove(&cb_ident_idr, clp->cl_cb_ident); | |
248 | } | |
249 | ||
f7e8917a FI |
250 | static void pnfs_init_server(struct nfs_server *server) |
251 | { | |
252 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
253 | } | |
254 | ||
0aaaf5c4 CL |
255 | static void nfs4_destroy_server(struct nfs_server *server) |
256 | { | |
257 | nfs4_purge_state_owners(server); | |
258 | } | |
259 | ||
888ef2e3 AB |
260 | #else |
261 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
262 | { | |
263 | } | |
f4eecd5d AA |
264 | |
265 | void nfs_cleanup_cb_ident_idr(void) | |
266 | { | |
267 | } | |
268 | ||
269 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
270 | { | |
271 | } | |
f7e8917a FI |
272 | |
273 | static void pnfs_init_server(struct nfs_server *server) | |
274 | { | |
275 | } | |
276 | ||
888ef2e3 | 277 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 278 | |
24c8dbbb DH |
279 | /* |
280 | * Destroy a shared client record | |
281 | */ | |
282 | static void nfs_free_client(struct nfs_client *clp) | |
283 | { | |
40c55319 | 284 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 285 | |
5dd3177a | 286 | nfs4_shutdown_client(clp); |
24c8dbbb | 287 | |
14727281 DH |
288 | nfs_fscache_release_client_cookie(clp); |
289 | ||
24c8dbbb DH |
290 | /* -EIO all pending I/O */ |
291 | if (!IS_ERR(clp->cl_rpcclient)) | |
292 | rpc_shutdown_client(clp->cl_rpcclient); | |
293 | ||
7c67db3a TM |
294 | if (clp->cl_machine_cred != NULL) |
295 | put_rpccred(clp->cl_machine_cred); | |
296 | ||
1775bc34 BH |
297 | nfs4_deviceid_purge_client(clp); |
298 | ||
24c8dbbb | 299 | kfree(clp->cl_hostname); |
78fe0f41 | 300 | kfree(clp->server_scope); |
24c8dbbb DH |
301 | kfree(clp); |
302 | ||
303 | dprintk("<-- nfs_free_client()\n"); | |
304 | } | |
305 | ||
306 | /* | |
307 | * Release a reference to a shared client record | |
308 | */ | |
309 | void nfs_put_client(struct nfs_client *clp) | |
310 | { | |
27ba8512 DH |
311 | if (!clp) |
312 | return; | |
313 | ||
24c8dbbb DH |
314 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
315 | ||
316 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
317 | list_del(&clp->cl_share_link); | |
f4eecd5d | 318 | nfs_cb_idr_remove_locked(clp); |
24c8dbbb DH |
319 | spin_unlock(&nfs_client_lock); |
320 | ||
321 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
322 | ||
323 | nfs_free_client(clp); | |
324 | } | |
325 | } | |
16b374ca | 326 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 327 | |
9082a5cc | 328 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
329 | /* |
330 | * Test if two ip6 socket addresses refer to the same socket by | |
331 | * comparing relevant fields. The padding bytes specifically, are not | |
332 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
333 | * and sin6_scope_id is only compared if the address is "link local" | |
334 | * because "link local" addresses need only be unique to a specific | |
335 | * link. Conversely, ordinary unicast addresses might have different | |
336 | * sin6_scope_id. | |
337 | * | |
338 | * The caller should ensure both socket addresses are AF_INET6. | |
339 | */ | |
3c8c45df CL |
340 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
341 | const struct sockaddr *sa2) | |
9f4c899c | 342 | { |
3c8c45df CL |
343 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
344 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 345 | |
b9dd3abb | 346 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 347 | return 0; |
b9dd3abb MJ |
348 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
349 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 350 | |
b9dd3abb | 351 | return 1; |
3b0d3f93 | 352 | } |
3c8c45df CL |
353 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
354 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
355 | const struct sockaddr *sa2) | |
9f4c899c TM |
356 | { |
357 | return 0; | |
358 | } | |
9082a5cc | 359 | #endif |
3b0d3f93 | 360 | |
d7371c41 ID |
361 | /* |
362 | * Test if two ip4 socket addresses refer to the same socket, by | |
363 | * comparing relevant fields. The padding bytes specifically, are | |
364 | * not compared. | |
365 | * | |
366 | * The caller should ensure both socket addresses are AF_INET. | |
367 | */ | |
3c8c45df CL |
368 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
369 | const struct sockaddr *sa2) | |
370 | { | |
371 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
372 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
373 | ||
374 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
375 | } | |
376 | ||
377 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
378 | const struct sockaddr *sa2) | |
379 | { | |
380 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
381 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
382 | ||
383 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
384 | (sin1->sin6_port == sin2->sin6_port); | |
385 | } | |
386 | ||
9f4c899c TM |
387 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
388 | const struct sockaddr *sa2) | |
d7371c41 | 389 | { |
3c8c45df CL |
390 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
391 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 392 | |
3c8c45df CL |
393 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
394 | (sin1->sin_port == sin2->sin_port); | |
395 | } | |
396 | ||
397 | /* | |
398 | * Test if two socket addresses represent the same actual socket, | |
399 | * by comparing (only) relevant fields, excluding the port number. | |
400 | */ | |
401 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
402 | const struct sockaddr *sa2) | |
403 | { | |
404 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 405 | return 0; |
3c8c45df CL |
406 | |
407 | switch (sa1->sa_family) { | |
408 | case AF_INET: | |
409 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
410 | case AF_INET6: | |
411 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
412 | } | |
413 | return 0; | |
d7371c41 ID |
414 | } |
415 | ||
d7371c41 ID |
416 | /* |
417 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 418 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
419 | */ |
420 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
421 | const struct sockaddr *sa2) | |
422 | { | |
423 | if (sa1->sa_family != sa2->sa_family) | |
424 | return 0; | |
425 | ||
426 | switch (sa1->sa_family) { | |
427 | case AF_INET: | |
9f4c899c | 428 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 429 | case AF_INET6: |
9f4c899c | 430 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
431 | } |
432 | return 0; | |
433 | } | |
434 | ||
c36fca52 AA |
435 | /* Common match routine for v4.0 and v4.1 callback services */ |
436 | bool | |
437 | nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp, | |
438 | u32 minorversion) | |
24c8dbbb | 439 | { |
c36fca52 | 440 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
24c8dbbb | 441 | |
c36fca52 AA |
442 | /* Don't match clients that failed to initialise */ |
443 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
444 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
445 | return false; | |
3b0d3f93 | 446 | |
c36fca52 AA |
447 | /* Match the version and minorversion */ |
448 | if (clp->rpc_ops->version != 4 || | |
449 | clp->cl_minorversion != minorversion) | |
450 | return false; | |
13bbc06a | 451 | |
c36fca52 AA |
452 | /* Match only the IP address, not the port number */ |
453 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
454 | return false; | |
24c8dbbb | 455 | |
c36fca52 | 456 | return true; |
3fbd67ad TM |
457 | } |
458 | ||
24c8dbbb | 459 | /* |
c81468a1 TM |
460 | * Find an nfs_client on the list that matches the initialisation data |
461 | * that is supplied. | |
24c8dbbb | 462 | */ |
c81468a1 | 463 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
464 | { |
465 | struct nfs_client *clp; | |
d7371c41 | 466 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 467 | |
c81468a1 | 468 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 469 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
470 | /* Don't match clients that failed to initialise properly */ |
471 | if (clp->cl_cons_state < 0) | |
472 | continue; | |
473 | ||
474 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 475 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
476 | continue; |
477 | ||
59dca3b2 TM |
478 | if (clp->cl_proto != data->proto) |
479 | continue; | |
5aae4a9a BH |
480 | /* Match nfsv4 minorversion */ |
481 | if (clp->cl_minorversion != data->minorversion) | |
482 | continue; | |
c81468a1 | 483 | /* Match the full socket address */ |
d7371c41 | 484 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 | 485 | continue; |
e50a7a1a SK |
486 | /* Match network namespace */ |
487 | if (clp->net != data->net) | |
488 | continue; | |
c81468a1 TM |
489 | |
490 | atomic_inc(&clp->cl_count); | |
491 | return clp; | |
13bbc06a | 492 | } |
c81468a1 | 493 | return NULL; |
24c8dbbb DH |
494 | } |
495 | ||
496 | /* | |
497 | * Look up a client by IP address and protocol version | |
498 | * - creates a new record if one doesn't yet exist | |
499 | */ | |
45a52a02 AA |
500 | static struct nfs_client * |
501 | nfs_get_client(const struct nfs_client_initdata *cl_init, | |
502 | const struct rpc_timeout *timeparms, | |
503 | const char *ip_addr, | |
504 | rpc_authflavor_t authflavour, | |
505 | int noresvport) | |
24c8dbbb DH |
506 | { |
507 | struct nfs_client *clp, *new = NULL; | |
508 | int error; | |
509 | ||
d7422c47 CL |
510 | dprintk("--> nfs_get_client(%s,v%u)\n", |
511 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
512 | |
513 | /* see if the client already exists */ | |
514 | do { | |
515 | spin_lock(&nfs_client_lock); | |
516 | ||
c81468a1 | 517 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
518 | if (clp) |
519 | goto found_client; | |
520 | if (new) | |
521 | goto install_client; | |
522 | ||
523 | spin_unlock(&nfs_client_lock); | |
524 | ||
3a498026 | 525 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 526 | } while (!IS_ERR(new)); |
24c8dbbb | 527 | |
a21bdd9b CL |
528 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
529 | return new; | |
24c8dbbb DH |
530 | |
531 | /* install a new client and return with it unready */ | |
532 | install_client: | |
533 | clp = new; | |
534 | list_add(&clp->cl_share_link, &nfs_client_list); | |
535 | spin_unlock(&nfs_client_lock); | |
45a52a02 AA |
536 | |
537 | error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr, | |
538 | authflavour, noresvport); | |
539 | if (error < 0) { | |
540 | nfs_put_client(clp); | |
541 | return ERR_PTR(error); | |
542 | } | |
24c8dbbb DH |
543 | dprintk("--> nfs_get_client() = %p [new]\n", clp); |
544 | return clp; | |
545 | ||
546 | /* found an existing client | |
547 | * - make sure it's ready before returning | |
548 | */ | |
549 | found_client: | |
550 | spin_unlock(&nfs_client_lock); | |
551 | ||
552 | if (new) | |
553 | nfs_free_client(new); | |
554 | ||
150030b7 | 555 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 556 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
557 | if (error < 0) { |
558 | nfs_put_client(clp); | |
559 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
560 | } |
561 | ||
562 | if (clp->cl_cons_state < NFS_CS_READY) { | |
563 | error = clp->cl_cons_state; | |
564 | nfs_put_client(clp); | |
565 | return ERR_PTR(error); | |
566 | } | |
567 | ||
54ceac45 DH |
568 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
569 | ||
24c8dbbb DH |
570 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
571 | return clp; | |
572 | } | |
573 | ||
574 | /* | |
575 | * Mark a server as ready or failed | |
576 | */ | |
76db6d95 | 577 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
578 | { |
579 | clp->cl_cons_state = state; | |
580 | wake_up_all(&nfs_client_active_wq); | |
581 | } | |
5006a76c | 582 | |
008f55d0 BH |
583 | /* |
584 | * With sessions, the client is not marked ready until after a | |
585 | * successful EXCHANGE_ID and CREATE_SESSION. | |
586 | * | |
587 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
588 | * other versions of NFS can be tried. | |
589 | */ | |
590 | int nfs4_check_client_ready(struct nfs_client *clp) | |
591 | { | |
592 | if (!nfs4_has_session(clp)) | |
593 | return 0; | |
594 | if (clp->cl_cons_state < NFS_CS_READY) | |
595 | return -EPROTONOSUPPORT; | |
596 | return 0; | |
597 | } | |
598 | ||
5006a76c DH |
599 | /* |
600 | * Initialise the timeout values for a connection | |
601 | */ | |
602 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
603 | unsigned int timeo, unsigned int retrans) | |
604 | { | |
605 | to->to_initval = timeo * HZ / 10; | |
606 | to->to_retries = retrans; | |
5006a76c DH |
607 | |
608 | switch (proto) { | |
0896a725 | 609 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 610 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
611 | if (to->to_retries == 0) |
612 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 613 | if (to->to_initval == 0) |
259875ef | 614 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
615 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
616 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
617 | to->to_increment = to->to_initval; | |
618 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
619 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
620 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
621 | if (to->to_maxval < to->to_initval) | |
622 | to->to_maxval = to->to_initval; | |
5006a76c DH |
623 | to->to_exponential = 0; |
624 | break; | |
0896a725 | 625 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
626 | if (to->to_retries == 0) |
627 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 628 | if (!to->to_initval) |
259875ef | 629 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
630 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
631 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
632 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
633 | to->to_exponential = 1; | |
634 | break; | |
259875ef TM |
635 | default: |
636 | BUG(); | |
5006a76c DH |
637 | } |
638 | } | |
639 | ||
640 | /* | |
641 | * Create an RPC client handle | |
642 | */ | |
59dca3b2 | 643 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
644 | const struct rpc_timeout *timeparms, |
645 | rpc_authflavor_t flavor, | |
4a01b8a4 | 646 | int discrtry, int noresvport) |
5006a76c | 647 | { |
5006a76c | 648 | struct rpc_clnt *clnt = NULL; |
41877d20 | 649 | struct rpc_create_args args = { |
6d59b8d5 | 650 | .net = clp->net, |
59dca3b2 | 651 | .protocol = clp->cl_proto, |
41877d20 | 652 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 653 | .addrsize = clp->cl_addrlen, |
33170233 | 654 | .timeout = timeparms, |
41877d20 CL |
655 | .servername = clp->cl_hostname, |
656 | .program = &nfs_program, | |
657 | .version = clp->rpc_ops->version, | |
658 | .authflavor = flavor, | |
659 | }; | |
5006a76c | 660 | |
4a01b8a4 CL |
661 | if (discrtry) |
662 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
663 | if (noresvport) | |
664 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
665 | ||
5006a76c DH |
666 | if (!IS_ERR(clp->cl_rpcclient)) |
667 | return 0; | |
668 | ||
41877d20 | 669 | clnt = rpc_create(&args); |
5006a76c DH |
670 | if (IS_ERR(clnt)) { |
671 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 672 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
673 | return PTR_ERR(clnt); |
674 | } | |
675 | ||
5006a76c DH |
676 | clp->cl_rpcclient = clnt; |
677 | return 0; | |
678 | } | |
54ceac45 DH |
679 | |
680 | /* | |
681 | * Version 2 or 3 client destruction | |
682 | */ | |
683 | static void nfs_destroy_server(struct nfs_server *server) | |
684 | { | |
5eebde23 SJ |
685 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
686 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 687 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
688 | } |
689 | ||
690 | /* | |
691 | * Version 2 or 3 lockd setup | |
692 | */ | |
693 | static int nfs_start_lockd(struct nfs_server *server) | |
694 | { | |
9289e7f9 CL |
695 | struct nlm_host *host; |
696 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
697 | struct nlmclnt_initdata nlm_init = { |
698 | .hostname = clp->cl_hostname, | |
699 | .address = (struct sockaddr *)&clp->cl_addr, | |
700 | .addrlen = clp->cl_addrlen, | |
883bb163 | 701 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
702 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
703 | 1 : 0, | |
883bb163 | 704 | }; |
54ceac45 | 705 | |
883bb163 | 706 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 707 | return 0; |
5eebde23 SJ |
708 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
709 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
710 | return 0; |
711 | ||
8a6e5deb TM |
712 | switch (clp->cl_proto) { |
713 | default: | |
714 | nlm_init.protocol = IPPROTO_TCP; | |
715 | break; | |
716 | case XPRT_TRANSPORT_UDP: | |
717 | nlm_init.protocol = IPPROTO_UDP; | |
718 | } | |
719 | ||
883bb163 | 720 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
721 | if (IS_ERR(host)) |
722 | return PTR_ERR(host); | |
723 | ||
724 | server->nlm_host = host; | |
725 | server->destroy = nfs_destroy_server; | |
726 | return 0; | |
54ceac45 DH |
727 | } |
728 | ||
729 | /* | |
730 | * Initialise an NFSv3 ACL client connection | |
731 | */ | |
732 | #ifdef CONFIG_NFS_V3_ACL | |
733 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
734 | { | |
40c55319 | 735 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
736 | goto out_noacl; |
737 | if (server->flags & NFS_MOUNT_NOACL) | |
738 | goto out_noacl; | |
739 | ||
740 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
741 | if (IS_ERR(server->client_acl)) | |
742 | goto out_noacl; | |
743 | ||
744 | /* No errors! Assume that Sun nfsacls are supported */ | |
745 | server->caps |= NFS_CAP_ACLS; | |
746 | return; | |
747 | ||
748 | out_noacl: | |
749 | server->caps &= ~NFS_CAP_ACLS; | |
750 | } | |
751 | #else | |
752 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
753 | { | |
754 | server->flags &= ~NFS_MOUNT_NOACL; | |
755 | server->caps &= ~NFS_CAP_ACLS; | |
756 | } | |
757 | #endif | |
758 | ||
759 | /* | |
760 | * Create a general RPC client | |
761 | */ | |
33170233 TM |
762 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
763 | const struct rpc_timeout *timeo, | |
764 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
765 | { |
766 | struct nfs_client *clp = server->nfs_client; | |
767 | ||
768 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
769 | if (IS_ERR(server->client)) { | |
3110ff80 | 770 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
771 | return PTR_ERR(server->client); |
772 | } | |
773 | ||
33170233 TM |
774 | memcpy(&server->client->cl_timeout_default, |
775 | timeo, | |
776 | sizeof(server->client->cl_timeout_default)); | |
777 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
778 | ||
54ceac45 DH |
779 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
780 | struct rpc_auth *auth; | |
781 | ||
782 | auth = rpcauth_create(pseudoflavour, server->client); | |
783 | if (IS_ERR(auth)) { | |
3110ff80 | 784 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
785 | return PTR_ERR(auth); |
786 | } | |
787 | } | |
788 | server->client->cl_softrtry = 0; | |
789 | if (server->flags & NFS_MOUNT_SOFT) | |
790 | server->client->cl_softrtry = 1; | |
791 | ||
54ceac45 DH |
792 | return 0; |
793 | } | |
794 | ||
795 | /* | |
796 | * Initialise an NFS2 or NFS3 client | |
797 | */ | |
45a52a02 AA |
798 | int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms, |
799 | const char *ip_addr, rpc_authflavor_t authflavour, | |
800 | int noresvport) | |
54ceac45 | 801 | { |
54ceac45 DH |
802 | int error; |
803 | ||
804 | if (clp->cl_cons_state == NFS_CS_READY) { | |
805 | /* the client is already initialised */ | |
806 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
807 | return 0; | |
808 | } | |
809 | ||
54ceac45 DH |
810 | /* |
811 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
812 | * - RFC 2623, sec 2.3.2 | |
813 | */ | |
d740351b | 814 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
45a52a02 | 815 | 0, noresvport); |
54ceac45 DH |
816 | if (error < 0) |
817 | goto error; | |
818 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
819 | return 0; | |
820 | ||
821 | error: | |
822 | nfs_mark_client_ready(clp, error); | |
823 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
824 | return error; | |
825 | } | |
826 | ||
827 | /* | |
828 | * Create a version 2 or 3 client | |
829 | */ | |
2283f8d6 TT |
830 | static int nfs_init_server(struct nfs_server *server, |
831 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 832 | { |
3a498026 TM |
833 | struct nfs_client_initdata cl_init = { |
834 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 835 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 836 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 837 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 838 | .proto = data->nfs_server.protocol, |
e50a7a1a | 839 | .net = data->net, |
3a498026 | 840 | }; |
33170233 | 841 | struct rpc_timeout timeparms; |
54ceac45 | 842 | struct nfs_client *clp; |
3a498026 | 843 | int error; |
54ceac45 DH |
844 | |
845 | dprintk("--> nfs_init_server()\n"); | |
846 | ||
847 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 848 | if (data->version == 3) |
40c55319 | 849 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
850 | #endif |
851 | ||
45a52a02 AA |
852 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
853 | data->timeo, data->retrans); | |
854 | ||
54ceac45 | 855 | /* Allocate or find a client reference we can use */ |
45a52a02 AA |
856 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX, |
857 | data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
858 | if (IS_ERR(clp)) { |
859 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
860 | return PTR_ERR(clp); | |
861 | } | |
862 | ||
54ceac45 DH |
863 | server->nfs_client = clp; |
864 | ||
865 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 866 | server->flags = data->flags; |
b797cac7 | 867 | server->options = data->options; |
62ab460c TM |
868 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
869 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
870 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
871 | |
872 | if (data->rsize) | |
873 | server->rsize = nfs_block_size(data->rsize, NULL); | |
874 | if (data->wsize) | |
875 | server->wsize = nfs_block_size(data->wsize, NULL); | |
876 | ||
877 | server->acregmin = data->acregmin * HZ; | |
878 | server->acregmax = data->acregmax * HZ; | |
879 | server->acdirmin = data->acdirmin * HZ; | |
880 | server->acdirmax = data->acdirmax * HZ; | |
881 | ||
882 | /* Start lockd here, before we might error out */ | |
883 | error = nfs_start_lockd(server); | |
884 | if (error < 0) | |
885 | goto error; | |
886 | ||
f22d6d79 CL |
887 | server->port = data->nfs_server.port; |
888 | ||
33170233 | 889 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
890 | if (error < 0) |
891 | goto error; | |
892 | ||
3f8400d1 CL |
893 | /* Preserve the values of mount_server-related mount options */ |
894 | if (data->mount_server.addrlen) { | |
895 | memcpy(&server->mountd_address, &data->mount_server.address, | |
896 | data->mount_server.addrlen); | |
897 | server->mountd_addrlen = data->mount_server.addrlen; | |
898 | } | |
899 | server->mountd_version = data->mount_server.version; | |
900 | server->mountd_port = data->mount_server.port; | |
901 | server->mountd_protocol = data->mount_server.protocol; | |
902 | ||
54ceac45 DH |
903 | server->namelen = data->namlen; |
904 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
905 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
906 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
907 | return 0; | |
908 | ||
909 | error: | |
910 | server->nfs_client = NULL; | |
911 | nfs_put_client(clp); | |
912 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
913 | return error; | |
914 | } | |
915 | ||
916 | /* | |
917 | * Load up the server record from information gained in an fsinfo record | |
918 | */ | |
738fd0f3 BH |
919 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
920 | struct nfs_fh *mntfh, | |
921 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
922 | { |
923 | unsigned long max_rpc_payload; | |
924 | ||
925 | /* Work out a lot of parameters */ | |
926 | if (server->rsize == 0) | |
927 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
928 | if (server->wsize == 0) | |
929 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
930 | ||
931 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
932 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
933 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
934 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
935 | ||
936 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
937 | if (server->rsize > max_rpc_payload) | |
938 | server->rsize = max_rpc_payload; | |
939 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
940 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
941 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 942 | |
d993831f | 943 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
944 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
945 | ||
946 | if (server->wsize > max_rpc_payload) | |
947 | server->wsize = max_rpc_payload; | |
948 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
949 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
950 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 951 | server->pnfs_blksize = fsinfo->blksize; |
738fd0f3 | 952 | set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype); |
85e174ba | 953 | |
54ceac45 DH |
954 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
955 | ||
956 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
957 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
958 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
959 | if (server->dtsize > server->rsize) |
960 | server->dtsize = server->rsize; | |
961 | ||
962 | if (server->flags & NFS_MOUNT_NOAC) { | |
963 | server->acregmin = server->acregmax = 0; | |
964 | server->acdirmin = server->acdirmax = 0; | |
965 | } | |
966 | ||
967 | server->maxfilesize = fsinfo->maxfilesize; | |
968 | ||
6b96724e RL |
969 | server->time_delta = fsinfo->time_delta; |
970 | ||
54ceac45 DH |
971 | /* We're airborne Set socket buffersize */ |
972 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
973 | } | |
974 | ||
975 | /* | |
976 | * Probe filesystem information, including the FSID on v2/v3 | |
977 | */ | |
978 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
979 | { | |
980 | struct nfs_fsinfo fsinfo; | |
981 | struct nfs_client *clp = server->nfs_client; | |
982 | int error; | |
983 | ||
984 | dprintk("--> nfs_probe_fsinfo()\n"); | |
985 | ||
986 | if (clp->rpc_ops->set_capabilities != NULL) { | |
987 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
988 | if (error < 0) | |
989 | goto out_error; | |
990 | } | |
991 | ||
992 | fsinfo.fattr = fattr; | |
85e174ba | 993 | fsinfo.layouttype = 0; |
54ceac45 DH |
994 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
995 | if (error < 0) | |
996 | goto out_error; | |
997 | ||
738fd0f3 | 998 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
999 | |
1000 | /* Get some general file system info */ | |
1001 | if (server->namelen == 0) { | |
1002 | struct nfs_pathconf pathinfo; | |
1003 | ||
1004 | pathinfo.fattr = fattr; | |
1005 | nfs_fattr_init(fattr); | |
1006 | ||
1007 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
1008 | server->namelen = pathinfo.max_namelen; | |
1009 | } | |
1010 | ||
1011 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
1012 | return 0; | |
1013 | ||
1014 | out_error: | |
1015 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
1016 | return error; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Copy useful information when duplicating a server record | |
1021 | */ | |
1022 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
1023 | { | |
1024 | target->flags = source->flags; | |
356e76b8 CL |
1025 | target->rsize = source->rsize; |
1026 | target->wsize = source->wsize; | |
54ceac45 DH |
1027 | target->acregmin = source->acregmin; |
1028 | target->acregmax = source->acregmax; | |
1029 | target->acdirmin = source->acdirmin; | |
1030 | target->acdirmax = source->acdirmax; | |
1031 | target->caps = source->caps; | |
2df54806 | 1032 | target->options = source->options; |
54ceac45 DH |
1033 | } |
1034 | ||
fca5238e CL |
1035 | static void nfs_server_insert_lists(struct nfs_server *server) |
1036 | { | |
1037 | struct nfs_client *clp = server->nfs_client; | |
1038 | ||
1039 | spin_lock(&nfs_client_lock); | |
1040 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); | |
1041 | list_add_tail(&server->master_link, &nfs_volume_list); | |
d3b4c9d7 | 1042 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e CL |
1043 | spin_unlock(&nfs_client_lock); |
1044 | ||
1045 | } | |
1046 | ||
1047 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1048 | { | |
d3b4c9d7 AA |
1049 | struct nfs_client *clp = server->nfs_client; |
1050 | ||
fca5238e CL |
1051 | spin_lock(&nfs_client_lock); |
1052 | list_del_rcu(&server->client_link); | |
d3b4c9d7 AA |
1053 | if (clp && list_empty(&clp->cl_superblocks)) |
1054 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
fca5238e CL |
1055 | list_del(&server->master_link); |
1056 | spin_unlock(&nfs_client_lock); | |
1057 | ||
1058 | synchronize_rcu(); | |
1059 | } | |
1060 | ||
54ceac45 DH |
1061 | /* |
1062 | * Allocate and initialise a server record | |
1063 | */ | |
1064 | static struct nfs_server *nfs_alloc_server(void) | |
1065 | { | |
1066 | struct nfs_server *server; | |
1067 | ||
1068 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1069 | if (!server) | |
1070 | return NULL; | |
1071 | ||
1072 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1073 | ||
1074 | /* Zero out the NFS state stuff */ | |
1075 | INIT_LIST_HEAD(&server->client_link); | |
1076 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1077 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1078 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1079 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1080 | |
ef818a28 SD |
1081 | atomic_set(&server->active, 0); |
1082 | ||
54ceac45 DH |
1083 | server->io_stats = nfs_alloc_iostats(); |
1084 | if (!server->io_stats) { | |
1085 | kfree(server); | |
1086 | return NULL; | |
1087 | } | |
1088 | ||
48d07649 JA |
1089 | if (bdi_init(&server->backing_dev_info)) { |
1090 | nfs_free_iostats(server->io_stats); | |
1091 | kfree(server); | |
1092 | return NULL; | |
1093 | } | |
1094 | ||
9157c31d | 1095 | ida_init(&server->openowner_id); |
d2d7ce28 | 1096 | ida_init(&server->lockowner_id); |
f7e8917a FI |
1097 | pnfs_init_server(server); |
1098 | ||
54ceac45 DH |
1099 | return server; |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Free up a server record | |
1104 | */ | |
1105 | void nfs_free_server(struct nfs_server *server) | |
1106 | { | |
1107 | dprintk("--> nfs_free_server()\n"); | |
1108 | ||
fca5238e | 1109 | nfs_server_remove_lists(server); |
85e174ba | 1110 | unset_pnfs_layoutdriver(server); |
54ceac45 DH |
1111 | |
1112 | if (server->destroy != NULL) | |
1113 | server->destroy(server); | |
5cef338b TM |
1114 | |
1115 | if (!IS_ERR(server->client_acl)) | |
1116 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1117 | if (!IS_ERR(server->client)) |
1118 | rpc_shutdown_client(server->client); | |
1119 | ||
1120 | nfs_put_client(server->nfs_client); | |
1121 | ||
d2d7ce28 | 1122 | ida_destroy(&server->lockowner_id); |
9157c31d | 1123 | ida_destroy(&server->openowner_id); |
54ceac45 | 1124 | nfs_free_iostats(server->io_stats); |
e0bf68dd | 1125 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1126 | kfree(server); |
1127 | nfs_release_automount_timer(); | |
1128 | dprintk("<-- nfs_free_server()\n"); | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Create a version 2 or 3 volume record | |
1133 | * - keyed on server and FSID | |
1134 | */ | |
2283f8d6 | 1135 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1136 | struct nfs_fh *mntfh) |
1137 | { | |
1138 | struct nfs_server *server; | |
fbca779a | 1139 | struct nfs_fattr *fattr; |
54ceac45 DH |
1140 | int error; |
1141 | ||
1142 | server = nfs_alloc_server(); | |
1143 | if (!server) | |
1144 | return ERR_PTR(-ENOMEM); | |
1145 | ||
fbca779a TM |
1146 | error = -ENOMEM; |
1147 | fattr = nfs_alloc_fattr(); | |
1148 | if (fattr == NULL) | |
1149 | goto error; | |
1150 | ||
54ceac45 DH |
1151 | /* Get a client representation */ |
1152 | error = nfs_init_server(server, data); | |
1153 | if (error < 0) | |
1154 | goto error; | |
1155 | ||
1156 | BUG_ON(!server->nfs_client); | |
1157 | BUG_ON(!server->nfs_client->rpc_ops); | |
1158 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1159 | ||
1160 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1161 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1162 | if (error < 0) |
1163 | goto error; | |
54af3bb5 TM |
1164 | if (server->nfs_client->rpc_ops->version == 3) { |
1165 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1166 | server->namelen = NFS3_MAXNAMLEN; | |
1167 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1168 | server->caps |= NFS_CAP_READDIRPLUS; | |
1169 | } else { | |
1170 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1171 | server->namelen = NFS2_MAXNAMLEN; | |
1172 | } | |
1173 | ||
fbca779a TM |
1174 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1175 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1176 | if (error < 0) { |
1177 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1178 | goto error; | |
1179 | } | |
1180 | } | |
fbca779a | 1181 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1182 | |
6daabf1b DH |
1183 | dprintk("Server FSID: %llx:%llx\n", |
1184 | (unsigned long long) server->fsid.major, | |
1185 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1186 | |
fca5238e | 1187 | nfs_server_insert_lists(server); |
54ceac45 | 1188 | server->mount_time = jiffies; |
fbca779a | 1189 | nfs_free_fattr(fattr); |
54ceac45 DH |
1190 | return server; |
1191 | ||
1192 | error: | |
fbca779a | 1193 | nfs_free_fattr(fattr); |
54ceac45 DH |
1194 | nfs_free_server(server); |
1195 | return ERR_PTR(error); | |
1196 | } | |
1197 | ||
1198 | #ifdef CONFIG_NFS_V4 | |
c36fca52 AA |
1199 | /* |
1200 | * NFSv4.0 callback thread helper | |
1201 | * | |
1202 | * Find a client by callback identifier | |
1203 | */ | |
1204 | struct nfs_client * | |
1205 | nfs4_find_client_ident(int cb_ident) | |
1206 | { | |
1207 | struct nfs_client *clp; | |
1208 | ||
1209 | spin_lock(&nfs_client_lock); | |
1210 | clp = idr_find(&cb_ident_idr, cb_ident); | |
1211 | if (clp) | |
1212 | atomic_inc(&clp->cl_count); | |
1213 | spin_unlock(&nfs_client_lock); | |
1214 | return clp; | |
1215 | } | |
1216 | ||
1217 | #if defined(CONFIG_NFS_V4_1) | |
1218 | /* | |
1219 | * NFSv4.1 callback thread helper | |
1220 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1221 | * minorversion, and sessionID | |
1222 | * | |
c36fca52 AA |
1223 | * Returns NULL if no such client |
1224 | */ | |
1225 | struct nfs_client * | |
1226 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1227 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1228 | { |
1229 | struct nfs_client *clp; | |
1230 | ||
1231 | spin_lock(&nfs_client_lock); | |
1232 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1233 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
1234 | continue; | |
1235 | ||
1236 | if (!nfs4_has_session(clp)) | |
1237 | continue; | |
1238 | ||
778be232 AA |
1239 | /* Match sessionid*/ |
1240 | if (memcmp(clp->cl_session->sess_id.data, | |
1241 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
c36fca52 AA |
1242 | continue; |
1243 | ||
1244 | atomic_inc(&clp->cl_count); | |
1245 | spin_unlock(&nfs_client_lock); | |
1246 | return clp; | |
1247 | } | |
1248 | spin_unlock(&nfs_client_lock); | |
1249 | return NULL; | |
1250 | } | |
1251 | ||
1252 | #else /* CONFIG_NFS_V4_1 */ | |
1253 | ||
1254 | struct nfs_client * | |
1255 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1256 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1257 | { |
1258 | return NULL; | |
1259 | } | |
1260 | #endif /* CONFIG_NFS_V4_1 */ | |
1261 | ||
9bdaa86d BH |
1262 | /* |
1263 | * Initialize the NFS4 callback service | |
1264 | */ | |
1265 | static int nfs4_init_callback(struct nfs_client *clp) | |
1266 | { | |
1267 | int error; | |
1268 | ||
1269 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1270 | if (nfs4_has_session(clp)) { |
1271 | error = xprt_setup_backchannel( | |
1272 | clp->cl_rpcclient->cl_xprt, | |
1273 | NFS41_BC_MIN_CALLBACKS); | |
1274 | if (error < 0) | |
1275 | return error; | |
1276 | } | |
1277 | ||
97dc1359 | 1278 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1279 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1280 | if (error < 0) { |
1281 | dprintk("%s: failed to start callback. Error = %d\n", | |
1282 | __func__, error); | |
1283 | return error; | |
1284 | } | |
1285 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1286 | } | |
1287 | return 0; | |
1288 | } | |
1289 | ||
557134a3 AA |
1290 | /* |
1291 | * Initialize the minor version specific parts of an NFS4 client record | |
1292 | */ | |
1293 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1294 | { | |
1295 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1296 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1297 | struct nfs4_session *session = NULL; |
1298 | /* | |
1299 | * Create the session and mark it expired. | |
1300 | * When a SEQUENCE operation encounters the expired session | |
1301 | * it will do session recovery to initialize it. | |
1302 | */ | |
1303 | session = nfs4_alloc_session(clp); | |
1304 | if (!session) | |
1305 | return -ENOMEM; | |
1306 | ||
1307 | clp->cl_session = session; | |
fe74ba3a TM |
1308 | /* |
1309 | * The create session reply races with the server back | |
1310 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1311 | * so that the client back channel can find the | |
1312 | * nfs_client struct | |
1313 | */ | |
1314 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1315 | } |
1316 | #endif /* CONFIG_NFS_V4_1 */ | |
1317 | ||
71468513 | 1318 | return nfs4_init_callback(clp); |
557134a3 AA |
1319 | } |
1320 | ||
54ceac45 DH |
1321 | /* |
1322 | * Initialise an NFS4 client record | |
1323 | */ | |
45a52a02 AA |
1324 | int nfs4_init_client(struct nfs_client *clp, |
1325 | const struct rpc_timeout *timeparms, | |
1326 | const char *ip_addr, | |
1327 | rpc_authflavor_t authflavour, | |
1328 | int noresvport) | |
54ceac45 DH |
1329 | { |
1330 | int error; | |
1331 | ||
1332 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1333 | /* the client is initialised already */ | |
1334 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1339 | clp->rpc_ops = &nfs_v4_clientops; | |
1340 | ||
59dca3b2 | 1341 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
45a52a02 | 1342 | 1, noresvport); |
54ceac45 DH |
1343 | if (error < 0) |
1344 | goto error; | |
f4373bf9 | 1345 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1346 | |
1347 | error = nfs_idmap_new(clp); | |
1348 | if (error < 0) { | |
1349 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1350 | __func__, error); |
54ceac45 DH |
1351 | goto error; |
1352 | } | |
9c5bf38d | 1353 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1354 | |
557134a3 AA |
1355 | error = nfs4_init_client_minor_version(clp); |
1356 | if (error < 0) | |
1357 | goto error; | |
1358 | ||
76db6d95 AA |
1359 | if (!nfs4_has_session(clp)) |
1360 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1361 | return 0; |
1362 | ||
1363 | error: | |
1364 | nfs_mark_client_ready(clp, error); | |
1365 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1366 | return error; | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | * Set up an NFS4 client | |
1371 | */ | |
1372 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1373 | const char *hostname, |
1374 | const struct sockaddr *addr, | |
1375 | const size_t addrlen, | |
7d9ac06f | 1376 | const char *ip_addr, |
54ceac45 | 1377 | rpc_authflavor_t authflavour, |
94a417f3 | 1378 | int proto, const struct rpc_timeout *timeparms, |
e50a7a1a | 1379 | u32 minorversion, struct net *net) |
54ceac45 | 1380 | { |
3a498026 TM |
1381 | struct nfs_client_initdata cl_init = { |
1382 | .hostname = hostname, | |
dcecae0f CL |
1383 | .addr = addr, |
1384 | .addrlen = addrlen, | |
40c55319 | 1385 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1386 | .proto = proto, |
5aae4a9a | 1387 | .minorversion = minorversion, |
e50a7a1a | 1388 | .net = net, |
3a498026 | 1389 | }; |
54ceac45 DH |
1390 | struct nfs_client *clp; |
1391 | int error; | |
1392 | ||
1393 | dprintk("--> nfs4_set_client()\n"); | |
1394 | ||
1395 | /* Allocate or find a client reference we can use */ | |
45a52a02 AA |
1396 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour, |
1397 | server->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
1398 | if (IS_ERR(clp)) { |
1399 | error = PTR_ERR(clp); | |
1400 | goto error; | |
1401 | } | |
54ceac45 | 1402 | |
d6fb79d4 AA |
1403 | /* |
1404 | * Query for the lease time on clientid setup or renewal | |
1405 | * | |
1406 | * Note that this will be set on nfs_clients that were created | |
1407 | * only for the DS role and did not set this bit, but now will | |
1408 | * serve a dual role. | |
1409 | */ | |
1410 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
1411 | ||
54ceac45 DH |
1412 | server->nfs_client = clp; |
1413 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1414 | return 0; | |
54ceac45 DH |
1415 | error: |
1416 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1417 | return error; | |
1418 | } | |
1419 | ||
d83217c1 AA |
1420 | /* |
1421 | * Set up a pNFS Data Server client. | |
1422 | * | |
1423 | * Return any existing nfs_client that matches server address,port,version | |
1424 | * and minorversion. | |
1425 | * | |
1426 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
1427 | * low timeout interval so that if a connection is lost, we retry through | |
1428 | * the MDS. | |
1429 | */ | |
1430 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
1431 | const struct sockaddr *ds_addr, | |
1432 | int ds_addrlen, int ds_proto) | |
1433 | { | |
1434 | struct nfs_client_initdata cl_init = { | |
1435 | .addr = ds_addr, | |
1436 | .addrlen = ds_addrlen, | |
1437 | .rpc_ops = &nfs_v4_clientops, | |
1438 | .proto = ds_proto, | |
1439 | .minorversion = mds_clp->cl_minorversion, | |
e50a7a1a | 1440 | .net = mds_clp->net, |
d83217c1 AA |
1441 | }; |
1442 | struct rpc_timeout ds_timeout = { | |
1443 | .to_initval = 15 * HZ, | |
1444 | .to_maxval = 15 * HZ, | |
1445 | .to_retries = 1, | |
1446 | .to_exponential = 1, | |
1447 | }; | |
1448 | struct nfs_client *clp; | |
1449 | ||
1450 | /* | |
1451 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1452 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1453 | * (section 13.1 RFC 5661). | |
1454 | */ | |
1455 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
1456 | mds_clp->cl_rpcclient->cl_auth->au_flavor, 0); | |
1457 | ||
1458 | dprintk("<-- %s %p\n", __func__, clp); | |
1459 | return clp; | |
1460 | } | |
94b134ac | 1461 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); |
557134a3 | 1462 | |
96b09e02 AA |
1463 | /* |
1464 | * Session has been established, and the client marked ready. | |
1465 | * Set the mount rsize and wsize with negotiated fore channel | |
1466 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1467 | */ | |
1468 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1469 | { | |
1470 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1471 | struct nfs4_session *sess; |
1472 | u32 server_resp_sz; | |
1473 | u32 server_rqst_sz; | |
1474 | ||
96b09e02 AA |
1475 | if (!nfs4_has_session(server->nfs_client)) |
1476 | return; | |
2449ea2e AB |
1477 | sess = server->nfs_client->cl_session; |
1478 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1479 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1480 | ||
1481 | if (server->rsize > server_resp_sz) | |
1482 | server->rsize = server_resp_sz; | |
1483 | if (server->wsize > server_rqst_sz) | |
1484 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1485 | #endif /* CONFIG_NFS_V4_1 */ |
1486 | } | |
1487 | ||
44950b67 TM |
1488 | static int nfs4_server_common_setup(struct nfs_server *server, |
1489 | struct nfs_fh *mntfh) | |
1490 | { | |
1491 | struct nfs_fattr *fattr; | |
1492 | int error; | |
1493 | ||
1494 | BUG_ON(!server->nfs_client); | |
1495 | BUG_ON(!server->nfs_client->rpc_ops); | |
1496 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1497 | ||
94de8b27 AA |
1498 | /* data servers support only a subset of NFSv4.1 */ |
1499 | if (is_ds_only_client(server->nfs_client)) | |
1500 | return -EPROTONOSUPPORT; | |
1501 | ||
44950b67 TM |
1502 | fattr = nfs_alloc_fattr(); |
1503 | if (fattr == NULL) | |
1504 | return -ENOMEM; | |
1505 | ||
1506 | /* We must ensure the session is initialised first */ | |
1507 | error = nfs4_init_session(server); | |
1508 | if (error < 0) | |
1509 | goto out; | |
1510 | ||
1511 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1512 | error = nfs4_get_rootfh(server, mntfh); | |
1513 | if (error < 0) | |
1514 | goto out; | |
1515 | ||
1516 | dprintk("Server FSID: %llx:%llx\n", | |
1517 | (unsigned long long) server->fsid.major, | |
1518 | (unsigned long long) server->fsid.minor); | |
1519 | dprintk("Mount FH: %d\n", mntfh->size); | |
1520 | ||
1521 | nfs4_session_set_rwsize(server); | |
1522 | ||
1523 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1524 | if (error < 0) | |
1525 | goto out; | |
1526 | ||
1527 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1528 | server->namelen = NFS4_MAXNAMLEN; | |
1529 | ||
fca5238e | 1530 | nfs_server_insert_lists(server); |
44950b67 | 1531 | server->mount_time = jiffies; |
0aaaf5c4 | 1532 | server->destroy = nfs4_destroy_server; |
44950b67 TM |
1533 | out: |
1534 | nfs_free_fattr(fattr); | |
1535 | return error; | |
1536 | } | |
1537 | ||
54ceac45 DH |
1538 | /* |
1539 | * Create a version 4 volume record | |
1540 | */ | |
1541 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1542 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1543 | { |
33170233 | 1544 | struct rpc_timeout timeparms; |
54ceac45 DH |
1545 | int error; |
1546 | ||
1547 | dprintk("--> nfs4_init_server()\n"); | |
1548 | ||
33170233 TM |
1549 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1550 | data->timeo, data->retrans); | |
1551 | ||
542fcc33 CL |
1552 | /* Initialise the client representation from the mount data */ |
1553 | server->flags = data->flags; | |
82f2e547 BS |
1554 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1555 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1556 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1557 | server->options = data->options; |
542fcc33 | 1558 | |
33170233 TM |
1559 | /* Get a client record */ |
1560 | error = nfs4_set_client(server, | |
1561 | data->nfs_server.hostname, | |
1562 | (const struct sockaddr *)&data->nfs_server.address, | |
1563 | data->nfs_server.addrlen, | |
1564 | data->client_address, | |
1565 | data->auth_flavors[0], | |
1566 | data->nfs_server.protocol, | |
94a417f3 | 1567 | &timeparms, |
e50a7a1a SK |
1568 | data->minorversion, |
1569 | data->net); | |
33170233 TM |
1570 | if (error < 0) |
1571 | goto error; | |
1572 | ||
b064eca2 TM |
1573 | /* |
1574 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1575 | * authentication. | |
1576 | */ | |
1577 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
1578 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1579 | ||
54ceac45 DH |
1580 | if (data->rsize) |
1581 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1582 | if (data->wsize) | |
1583 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1584 | ||
1585 | server->acregmin = data->acregmin * HZ; | |
1586 | server->acregmax = data->acregmax * HZ; | |
1587 | server->acdirmin = data->acdirmin * HZ; | |
1588 | server->acdirmax = data->acdirmax * HZ; | |
1589 | ||
f22d6d79 CL |
1590 | server->port = data->nfs_server.port; |
1591 | ||
33170233 | 1592 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1593 | |
33170233 | 1594 | error: |
54ceac45 DH |
1595 | /* Done */ |
1596 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1597 | return error; | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * Create a version 4 volume record | |
1602 | * - keyed on server and FSID | |
1603 | */ | |
91ea40b9 | 1604 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1605 | struct nfs_fh *mntfh) |
1606 | { | |
54ceac45 DH |
1607 | struct nfs_server *server; |
1608 | int error; | |
1609 | ||
1610 | dprintk("--> nfs4_create_server()\n"); | |
1611 | ||
1612 | server = nfs_alloc_server(); | |
1613 | if (!server) | |
1614 | return ERR_PTR(-ENOMEM); | |
1615 | ||
54ceac45 | 1616 | /* set up the general RPC client */ |
91ea40b9 | 1617 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1618 | if (error < 0) |
1619 | goto error; | |
1620 | ||
44950b67 | 1621 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1622 | if (error < 0) |
1623 | goto error; | |
1624 | ||
54ceac45 DH |
1625 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1626 | return server; | |
1627 | ||
1628 | error: | |
1629 | nfs_free_server(server); | |
1630 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1631 | return ERR_PTR(error); | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Create an NFS4 referral server record | |
1636 | */ | |
1637 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1638 | struct nfs_fh *mntfh) |
54ceac45 DH |
1639 | { |
1640 | struct nfs_client *parent_client; | |
1641 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1642 | int error; |
1643 | ||
1644 | dprintk("--> nfs4_create_referral_server()\n"); | |
1645 | ||
1646 | server = nfs_alloc_server(); | |
1647 | if (!server) | |
1648 | return ERR_PTR(-ENOMEM); | |
1649 | ||
1650 | parent_server = NFS_SB(data->sb); | |
1651 | parent_client = parent_server->nfs_client; | |
1652 | ||
542fcc33 CL |
1653 | /* Initialise the client representation from the parent server */ |
1654 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1655 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1656 | |
54ceac45 DH |
1657 | /* Get a client representation. |
1658 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1659 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1660 | data->addr, |
1661 | data->addrlen, | |
dcecae0f CL |
1662 | parent_client->cl_ipaddr, |
1663 | data->authflavor, | |
1664 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1665 | parent_server->client->cl_timeout, |
e50a7a1a SK |
1666 | parent_client->cl_mvops->minor_version, |
1667 | parent_client->net); | |
297de4f6 AA |
1668 | if (error < 0) |
1669 | goto error; | |
54ceac45 | 1670 | |
33170233 | 1671 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1672 | if (error < 0) |
1673 | goto error; | |
1674 | ||
44950b67 | 1675 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1676 | if (error < 0) |
1677 | goto error; | |
1678 | ||
54ceac45 DH |
1679 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1680 | return server; | |
1681 | ||
1682 | error: | |
1683 | nfs_free_server(server); | |
1684 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1685 | return ERR_PTR(error); | |
1686 | } | |
1687 | ||
1688 | #endif /* CONFIG_NFS_V4 */ | |
1689 | ||
1690 | /* | |
1691 | * Clone an NFS2, NFS3 or NFS4 server record | |
1692 | */ | |
1693 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1694 | struct nfs_fh *fh, | |
1695 | struct nfs_fattr *fattr) | |
1696 | { | |
1697 | struct nfs_server *server; | |
fbca779a | 1698 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1699 | int error; |
1700 | ||
1701 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1702 | (unsigned long long) fattr->fsid.major, |
1703 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1704 | |
1705 | server = nfs_alloc_server(); | |
1706 | if (!server) | |
1707 | return ERR_PTR(-ENOMEM); | |
1708 | ||
fbca779a TM |
1709 | error = -ENOMEM; |
1710 | fattr_fsinfo = nfs_alloc_fattr(); | |
1711 | if (fattr_fsinfo == NULL) | |
1712 | goto out_free_server; | |
1713 | ||
54ceac45 DH |
1714 | /* Copy data from the source */ |
1715 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1716 | server->destroy = source->destroy; |
54ceac45 DH |
1717 | atomic_inc(&server->nfs_client->cl_count); |
1718 | nfs_server_copy_userdata(server, source); | |
1719 | ||
1720 | server->fsid = fattr->fsid; | |
1721 | ||
33170233 TM |
1722 | error = nfs_init_server_rpcclient(server, |
1723 | source->client->cl_timeout, | |
1724 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1725 | if (error < 0) |
1726 | goto out_free_server; | |
1727 | if (!IS_ERR(source->client_acl)) | |
1728 | nfs_init_server_aclclient(server); | |
1729 | ||
1730 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1731 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1732 | if (error < 0) |
1733 | goto out_free_server; | |
1734 | ||
54af3bb5 TM |
1735 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1736 | server->namelen = NFS4_MAXNAMLEN; | |
1737 | ||
54ceac45 | 1738 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1739 | (unsigned long long) server->fsid.major, |
1740 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1741 | |
1742 | error = nfs_start_lockd(server); | |
1743 | if (error < 0) | |
1744 | goto out_free_server; | |
1745 | ||
fca5238e | 1746 | nfs_server_insert_lists(server); |
54ceac45 DH |
1747 | server->mount_time = jiffies; |
1748 | ||
fbca779a | 1749 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1750 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1751 | return server; | |
1752 | ||
1753 | out_free_server: | |
fbca779a | 1754 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1755 | nfs_free_server(server); |
1756 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1757 | return ERR_PTR(error); | |
1758 | } | |
6aaca566 DH |
1759 | |
1760 | #ifdef CONFIG_PROC_FS | |
1761 | static struct proc_dir_entry *proc_fs_nfs; | |
1762 | ||
1763 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1764 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1765 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1766 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1767 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1768 | ||
88e9d34c | 1769 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1770 | .start = nfs_server_list_start, |
1771 | .next = nfs_server_list_next, | |
1772 | .stop = nfs_server_list_stop, | |
1773 | .show = nfs_server_list_show, | |
1774 | }; | |
1775 | ||
00977a59 | 1776 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1777 | .open = nfs_server_list_open, |
1778 | .read = seq_read, | |
1779 | .llseek = seq_lseek, | |
1780 | .release = seq_release, | |
34b37235 | 1781 | .owner = THIS_MODULE, |
6aaca566 DH |
1782 | }; |
1783 | ||
1784 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1785 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1786 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1787 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1788 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1789 | ||
88e9d34c | 1790 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1791 | .start = nfs_volume_list_start, |
1792 | .next = nfs_volume_list_next, | |
1793 | .stop = nfs_volume_list_stop, | |
1794 | .show = nfs_volume_list_show, | |
1795 | }; | |
1796 | ||
00977a59 | 1797 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1798 | .open = nfs_volume_list_open, |
1799 | .read = seq_read, | |
1800 | .llseek = seq_lseek, | |
1801 | .release = seq_release, | |
34b37235 | 1802 | .owner = THIS_MODULE, |
6aaca566 DH |
1803 | }; |
1804 | ||
1805 | /* | |
1806 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1807 | * we're dealing | |
1808 | */ | |
1809 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1810 | { | |
1811 | struct seq_file *m; | |
1812 | int ret; | |
1813 | ||
1814 | ret = seq_open(file, &nfs_server_list_ops); | |
1815 | if (ret < 0) | |
1816 | return ret; | |
1817 | ||
1818 | m = file->private_data; | |
1819 | m->private = PDE(inode)->data; | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | * set up the iterator to start reading from the server list and return the first item | |
1826 | */ | |
1827 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1828 | { | |
6aaca566 DH |
1829 | /* lock the list against modification */ |
1830 | spin_lock(&nfs_client_lock); | |
259902ea | 1831 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1832 | } |
1833 | ||
1834 | /* | |
1835 | * move to next server | |
1836 | */ | |
1837 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1838 | { | |
259902ea | 1839 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1840 | } |
1841 | ||
1842 | /* | |
1843 | * clean up after reading from the transports list | |
1844 | */ | |
1845 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1846 | { | |
1847 | spin_unlock(&nfs_client_lock); | |
1848 | } | |
1849 | ||
1850 | /* | |
1851 | * display a header line followed by a load of call lines | |
1852 | */ | |
1853 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1854 | { | |
1855 | struct nfs_client *clp; | |
1856 | ||
1857 | /* display header on line 1 */ | |
259902ea | 1858 | if (v == &nfs_client_list) { |
6aaca566 DH |
1859 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1860 | return 0; | |
1861 | } | |
1862 | ||
1863 | /* display one transport per line on subsequent lines */ | |
1864 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1865 | ||
940aab49 MN |
1866 | /* Check if the client is initialized */ |
1867 | if (clp->cl_cons_state != NFS_CS_READY) | |
1868 | return 0; | |
1869 | ||
5d8515ca | 1870 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1871 | clp->rpc_ops->version, |
5d8515ca CL |
1872 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1873 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1874 | atomic_read(&clp->cl_count), |
1875 | clp->cl_hostname); | |
1876 | ||
1877 | return 0; | |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1882 | */ | |
1883 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1884 | { | |
1885 | struct seq_file *m; | |
1886 | int ret; | |
1887 | ||
1888 | ret = seq_open(file, &nfs_volume_list_ops); | |
1889 | if (ret < 0) | |
1890 | return ret; | |
1891 | ||
1892 | m = file->private_data; | |
1893 | m->private = PDE(inode)->data; | |
1894 | ||
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * set up the iterator to start reading from the volume list and return the first item | |
1900 | */ | |
1901 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1902 | { | |
6aaca566 DH |
1903 | /* lock the list against modification */ |
1904 | spin_lock(&nfs_client_lock); | |
259902ea | 1905 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1906 | } |
1907 | ||
1908 | /* | |
1909 | * move to next volume | |
1910 | */ | |
1911 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1912 | { | |
259902ea | 1913 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1914 | } |
1915 | ||
1916 | /* | |
1917 | * clean up after reading from the transports list | |
1918 | */ | |
1919 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1920 | { | |
1921 | spin_unlock(&nfs_client_lock); | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * display a header line followed by a load of call lines | |
1926 | */ | |
1927 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1928 | { | |
1929 | struct nfs_server *server; | |
1930 | struct nfs_client *clp; | |
1931 | char dev[8], fsid[17]; | |
1932 | ||
1933 | /* display header on line 1 */ | |
259902ea | 1934 | if (v == &nfs_volume_list) { |
5d1acff1 | 1935 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1936 | return 0; |
1937 | } | |
1938 | /* display one transport per line on subsequent lines */ | |
1939 | server = list_entry(v, struct nfs_server, master_link); | |
1940 | clp = server->nfs_client; | |
1941 | ||
1942 | snprintf(dev, 8, "%u:%u", | |
1943 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1944 | ||
1945 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1946 | (unsigned long long) server->fsid.major, |
1947 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1948 | |
5d1acff1 | 1949 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1950 | clp->rpc_ops->version, |
5d8515ca CL |
1951 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1952 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1953 | dev, |
5d1acff1 DH |
1954 | fsid, |
1955 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1956 | |
1957 | return 0; | |
1958 | } | |
1959 | ||
1960 | /* | |
1961 | * initialise the /proc/fs/nfsfs/ directory | |
1962 | */ | |
1963 | int __init nfs_fs_proc_init(void) | |
1964 | { | |
1965 | struct proc_dir_entry *p; | |
1966 | ||
36a5aeb8 | 1967 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1968 | if (!proc_fs_nfs) |
1969 | goto error_0; | |
1970 | ||
6aaca566 | 1971 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1972 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1973 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1974 | if (!p) |
1975 | goto error_1; | |
1976 | ||
6aaca566 | 1977 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1978 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1979 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1980 | if (!p) |
1981 | goto error_2; | |
6aaca566 DH |
1982 | return 0; |
1983 | ||
1984 | error_2: | |
1985 | remove_proc_entry("servers", proc_fs_nfs); | |
1986 | error_1: | |
36a5aeb8 | 1987 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1988 | error_0: |
1989 | return -ENOMEM; | |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * clean up the /proc/fs/nfsfs/ directory | |
1994 | */ | |
1995 | void nfs_fs_proc_exit(void) | |
1996 | { | |
1997 | remove_proc_entry("volumes", proc_fs_nfs); | |
1998 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1999 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
2000 | } |
2001 | ||
2002 | #endif /* CONFIG_PROC_FS */ | |
b064eca2 TM |
2003 | |
2004 | module_param(nfs4_disable_idmapping, bool, 0644); | |
2005 | MODULE_PARM_DESC(nfs4_disable_idmapping, | |
2006 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |