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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 | ||
55 | static DEFINE_SPINLOCK(nfs_client_lock); | |
56 | static 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 | */ | |
92 | static struct rpc_version *nfs_version[5] = { | |
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 | ||
102 | struct rpc_program nfs_program = { | |
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 }; | |
118 | static struct rpc_version * nfsacl_version[] = { | |
119 | [3] = &nfsacl_version3, | |
120 | }; | |
121 | ||
122 | struct rpc_program nfsacl_program = { | |
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; |
3a498026 TM |
138 | }; |
139 | ||
24c8dbbb DH |
140 | /* |
141 | * Allocate a shared client record | |
142 | * | |
143 | * Since these are allocated/deallocated very rarely, we don't | |
144 | * bother putting them in a slab cache... | |
145 | */ | |
3a498026 | 146 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
147 | { |
148 | struct nfs_client *clp; | |
7c67db3a | 149 | struct rpc_cred *cred; |
a21bdd9b | 150 | int err = -ENOMEM; |
24c8dbbb DH |
151 | |
152 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
153 | goto error_0; | |
154 | ||
40c55319 TM |
155 | clp->rpc_ops = cl_init->rpc_ops; |
156 | ||
24c8dbbb DH |
157 | atomic_set(&clp->cl_count, 1); |
158 | clp->cl_cons_state = NFS_CS_INITING; | |
159 | ||
6e4cffd7 CL |
160 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
161 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 162 | |
3a498026 | 163 | if (cl_init->hostname) { |
a21bdd9b | 164 | err = -ENOMEM; |
3a498026 | 165 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 166 | if (!clp->cl_hostname) |
71468513 | 167 | goto error_cleanup; |
24c8dbbb DH |
168 | } |
169 | ||
170 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
171 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
172 | ||
59dca3b2 TM |
173 | clp->cl_proto = cl_init->proto; |
174 | ||
24c8dbbb | 175 | #ifdef CONFIG_NFS_V4 |
f4eecd5d AA |
176 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); |
177 | if (err) | |
178 | goto error_cleanup; | |
179 | ||
24c8dbbb | 180 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 181 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
182 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
183 | clp->cl_boot_time = CURRENT_TIME; | |
184 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
5aae4a9a | 185 | clp->cl_minorversion = cl_init->minorversion; |
97dc1359 | 186 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
24c8dbbb | 187 | #endif |
68c97153 | 188 | cred = rpc_lookup_machine_cred("*"); |
7c67db3a TM |
189 | if (!IS_ERR(cred)) |
190 | clp->cl_machine_cred = cred; | |
14727281 DH |
191 | nfs_fscache_get_client_cookie(clp); |
192 | ||
24c8dbbb DH |
193 | return clp; |
194 | ||
71468513 | 195 | error_cleanup: |
24c8dbbb DH |
196 | kfree(clp); |
197 | error_0: | |
a21bdd9b | 198 | return ERR_PTR(err); |
24c8dbbb DH |
199 | } |
200 | ||
5dd3177a | 201 | #ifdef CONFIG_NFS_V4 |
557134a3 | 202 | #ifdef CONFIG_NFS_V4_1 |
ea005281 AA |
203 | static void nfs4_shutdown_session(struct nfs_client *clp) |
204 | { | |
205 | if (nfs4_has_session(clp)) | |
557134a3 | 206 | nfs4_destroy_session(clp->cl_session); |
888ef2e3 | 207 | } |
ea005281 AA |
208 | #else /* CONFIG_NFS_V4_1 */ |
209 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
210 | { | |
211 | } | |
212 | #endif /* CONFIG_NFS_V4_1 */ | |
71468513 | 213 | |
888ef2e3 AB |
214 | /* |
215 | * Destroy the NFS4 callback service | |
216 | */ | |
217 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
218 | { | |
219 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 220 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
221 | } |
222 | ||
223 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
224 | { | |
225 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
226 | nfs4_kill_renewd(clp); | |
ea005281 | 227 | nfs4_shutdown_session(clp); |
71468513 | 228 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
229 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
230 | nfs_idmap_delete(clp); | |
231 | ||
232 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
557134a3 | 233 | } |
f4eecd5d AA |
234 | |
235 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ | |
236 | void nfs_cleanup_cb_ident_idr(void) | |
237 | { | |
238 | idr_destroy(&cb_ident_idr); | |
239 | } | |
240 | ||
241 | /* nfs_client_lock held */ | |
242 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
243 | { | |
244 | if (clp->cl_cb_ident) | |
245 | idr_remove(&cb_ident_idr, clp->cl_cb_ident); | |
246 | } | |
247 | ||
f7e8917a FI |
248 | static void pnfs_init_server(struct nfs_server *server) |
249 | { | |
250 | rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); | |
251 | } | |
252 | ||
0aaaf5c4 CL |
253 | static void nfs4_destroy_server(struct nfs_server *server) |
254 | { | |
255 | nfs4_purge_state_owners(server); | |
256 | } | |
257 | ||
888ef2e3 AB |
258 | #else |
259 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
260 | { | |
261 | } | |
f4eecd5d AA |
262 | |
263 | void nfs_cleanup_cb_ident_idr(void) | |
264 | { | |
265 | } | |
266 | ||
267 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
268 | { | |
269 | } | |
f7e8917a FI |
270 | |
271 | static void pnfs_init_server(struct nfs_server *server) | |
272 | { | |
273 | } | |
274 | ||
888ef2e3 | 275 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 276 | |
24c8dbbb DH |
277 | /* |
278 | * Destroy a shared client record | |
279 | */ | |
280 | static void nfs_free_client(struct nfs_client *clp) | |
281 | { | |
40c55319 | 282 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 283 | |
5dd3177a | 284 | nfs4_shutdown_client(clp); |
24c8dbbb | 285 | |
14727281 DH |
286 | nfs_fscache_release_client_cookie(clp); |
287 | ||
24c8dbbb DH |
288 | /* -EIO all pending I/O */ |
289 | if (!IS_ERR(clp->cl_rpcclient)) | |
290 | rpc_shutdown_client(clp->cl_rpcclient); | |
291 | ||
7c67db3a TM |
292 | if (clp->cl_machine_cred != NULL) |
293 | put_rpccred(clp->cl_machine_cred); | |
294 | ||
1775bc34 BH |
295 | nfs4_deviceid_purge_client(clp); |
296 | ||
24c8dbbb | 297 | kfree(clp->cl_hostname); |
78fe0f41 | 298 | kfree(clp->server_scope); |
24c8dbbb DH |
299 | kfree(clp); |
300 | ||
301 | dprintk("<-- nfs_free_client()\n"); | |
302 | } | |
303 | ||
304 | /* | |
305 | * Release a reference to a shared client record | |
306 | */ | |
307 | void nfs_put_client(struct nfs_client *clp) | |
308 | { | |
27ba8512 DH |
309 | if (!clp) |
310 | return; | |
311 | ||
24c8dbbb DH |
312 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
313 | ||
314 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
315 | list_del(&clp->cl_share_link); | |
f4eecd5d | 316 | nfs_cb_idr_remove_locked(clp); |
24c8dbbb DH |
317 | spin_unlock(&nfs_client_lock); |
318 | ||
319 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
320 | ||
321 | nfs_free_client(clp); | |
322 | } | |
323 | } | |
16b374ca | 324 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 325 | |
9082a5cc | 326 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
327 | /* |
328 | * Test if two ip6 socket addresses refer to the same socket by | |
329 | * comparing relevant fields. The padding bytes specifically, are not | |
330 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
331 | * and sin6_scope_id is only compared if the address is "link local" | |
332 | * because "link local" addresses need only be unique to a specific | |
333 | * link. Conversely, ordinary unicast addresses might have different | |
334 | * sin6_scope_id. | |
335 | * | |
336 | * The caller should ensure both socket addresses are AF_INET6. | |
337 | */ | |
3c8c45df CL |
338 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
339 | const struct sockaddr *sa2) | |
9f4c899c | 340 | { |
3c8c45df CL |
341 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
342 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 343 | |
b9dd3abb | 344 | if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr)) |
9f4c899c | 345 | return 0; |
b9dd3abb MJ |
346 | else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
347 | return sin1->sin6_scope_id == sin2->sin6_scope_id; | |
3b0d3f93 | 348 | |
b9dd3abb | 349 | return 1; |
3b0d3f93 | 350 | } |
3c8c45df CL |
351 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
352 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
353 | const struct sockaddr *sa2) | |
9f4c899c TM |
354 | { |
355 | return 0; | |
356 | } | |
9082a5cc | 357 | #endif |
3b0d3f93 | 358 | |
d7371c41 ID |
359 | /* |
360 | * Test if two ip4 socket addresses refer to the same socket, by | |
361 | * comparing relevant fields. The padding bytes specifically, are | |
362 | * not compared. | |
363 | * | |
364 | * The caller should ensure both socket addresses are AF_INET. | |
365 | */ | |
3c8c45df CL |
366 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
367 | const struct sockaddr *sa2) | |
368 | { | |
369 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
370 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
371 | ||
372 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
373 | } | |
374 | ||
375 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
376 | const struct sockaddr *sa2) | |
377 | { | |
378 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
379 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
380 | ||
381 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
382 | (sin1->sin6_port == sin2->sin6_port); | |
383 | } | |
384 | ||
9f4c899c TM |
385 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
386 | const struct sockaddr *sa2) | |
d7371c41 | 387 | { |
3c8c45df CL |
388 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
389 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 390 | |
3c8c45df CL |
391 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
392 | (sin1->sin_port == sin2->sin_port); | |
393 | } | |
394 | ||
395 | /* | |
396 | * Test if two socket addresses represent the same actual socket, | |
397 | * by comparing (only) relevant fields, excluding the port number. | |
398 | */ | |
399 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
400 | const struct sockaddr *sa2) | |
401 | { | |
402 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 403 | return 0; |
3c8c45df CL |
404 | |
405 | switch (sa1->sa_family) { | |
406 | case AF_INET: | |
407 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
408 | case AF_INET6: | |
409 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
410 | } | |
411 | return 0; | |
d7371c41 ID |
412 | } |
413 | ||
d7371c41 ID |
414 | /* |
415 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 416 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
417 | */ |
418 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
419 | const struct sockaddr *sa2) | |
420 | { | |
421 | if (sa1->sa_family != sa2->sa_family) | |
422 | return 0; | |
423 | ||
424 | switch (sa1->sa_family) { | |
425 | case AF_INET: | |
9f4c899c | 426 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 427 | case AF_INET6: |
9f4c899c | 428 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
429 | } |
430 | return 0; | |
431 | } | |
432 | ||
c36fca52 AA |
433 | /* Common match routine for v4.0 and v4.1 callback services */ |
434 | bool | |
435 | nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp, | |
436 | u32 minorversion) | |
24c8dbbb | 437 | { |
c36fca52 | 438 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
24c8dbbb | 439 | |
c36fca52 AA |
440 | /* Don't match clients that failed to initialise */ |
441 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
442 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
443 | return false; | |
3b0d3f93 | 444 | |
c36fca52 AA |
445 | /* Match the version and minorversion */ |
446 | if (clp->rpc_ops->version != 4 || | |
447 | clp->cl_minorversion != minorversion) | |
448 | return false; | |
13bbc06a | 449 | |
c36fca52 AA |
450 | /* Match only the IP address, not the port number */ |
451 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
452 | return false; | |
24c8dbbb | 453 | |
c36fca52 | 454 | return true; |
3fbd67ad TM |
455 | } |
456 | ||
24c8dbbb | 457 | /* |
c81468a1 TM |
458 | * Find an nfs_client on the list that matches the initialisation data |
459 | * that is supplied. | |
24c8dbbb | 460 | */ |
c81468a1 | 461 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
462 | { |
463 | struct nfs_client *clp; | |
d7371c41 | 464 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 465 | |
c81468a1 | 466 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 467 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
468 | /* Don't match clients that failed to initialise properly */ |
469 | if (clp->cl_cons_state < 0) | |
470 | continue; | |
471 | ||
472 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 473 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
474 | continue; |
475 | ||
59dca3b2 TM |
476 | if (clp->cl_proto != data->proto) |
477 | continue; | |
5aae4a9a BH |
478 | /* Match nfsv4 minorversion */ |
479 | if (clp->cl_minorversion != data->minorversion) | |
480 | continue; | |
c81468a1 | 481 | /* Match the full socket address */ |
d7371c41 | 482 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
483 | continue; |
484 | ||
485 | atomic_inc(&clp->cl_count); | |
486 | return clp; | |
13bbc06a | 487 | } |
c81468a1 | 488 | return NULL; |
24c8dbbb DH |
489 | } |
490 | ||
491 | /* | |
492 | * Look up a client by IP address and protocol version | |
493 | * - creates a new record if one doesn't yet exist | |
494 | */ | |
45a52a02 AA |
495 | static struct nfs_client * |
496 | nfs_get_client(const struct nfs_client_initdata *cl_init, | |
497 | const struct rpc_timeout *timeparms, | |
498 | const char *ip_addr, | |
499 | rpc_authflavor_t authflavour, | |
500 | int noresvport) | |
24c8dbbb DH |
501 | { |
502 | struct nfs_client *clp, *new = NULL; | |
503 | int error; | |
504 | ||
d7422c47 CL |
505 | dprintk("--> nfs_get_client(%s,v%u)\n", |
506 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
507 | |
508 | /* see if the client already exists */ | |
509 | do { | |
510 | spin_lock(&nfs_client_lock); | |
511 | ||
c81468a1 | 512 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
513 | if (clp) |
514 | goto found_client; | |
515 | if (new) | |
516 | goto install_client; | |
517 | ||
518 | spin_unlock(&nfs_client_lock); | |
519 | ||
3a498026 | 520 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 521 | } while (!IS_ERR(new)); |
24c8dbbb | 522 | |
a21bdd9b CL |
523 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
524 | return new; | |
24c8dbbb DH |
525 | |
526 | /* install a new client and return with it unready */ | |
527 | install_client: | |
528 | clp = new; | |
529 | list_add(&clp->cl_share_link, &nfs_client_list); | |
530 | spin_unlock(&nfs_client_lock); | |
45a52a02 AA |
531 | |
532 | error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr, | |
533 | authflavour, noresvport); | |
534 | if (error < 0) { | |
535 | nfs_put_client(clp); | |
536 | return ERR_PTR(error); | |
537 | } | |
24c8dbbb DH |
538 | dprintk("--> nfs_get_client() = %p [new]\n", clp); |
539 | return clp; | |
540 | ||
541 | /* found an existing client | |
542 | * - make sure it's ready before returning | |
543 | */ | |
544 | found_client: | |
545 | spin_unlock(&nfs_client_lock); | |
546 | ||
547 | if (new) | |
548 | nfs_free_client(new); | |
549 | ||
150030b7 | 550 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 551 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
552 | if (error < 0) { |
553 | nfs_put_client(clp); | |
554 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
555 | } |
556 | ||
557 | if (clp->cl_cons_state < NFS_CS_READY) { | |
558 | error = clp->cl_cons_state; | |
559 | nfs_put_client(clp); | |
560 | return ERR_PTR(error); | |
561 | } | |
562 | ||
54ceac45 DH |
563 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
564 | ||
24c8dbbb DH |
565 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
566 | return clp; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Mark a server as ready or failed | |
571 | */ | |
76db6d95 | 572 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
573 | { |
574 | clp->cl_cons_state = state; | |
575 | wake_up_all(&nfs_client_active_wq); | |
576 | } | |
5006a76c | 577 | |
008f55d0 BH |
578 | /* |
579 | * With sessions, the client is not marked ready until after a | |
580 | * successful EXCHANGE_ID and CREATE_SESSION. | |
581 | * | |
582 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
583 | * other versions of NFS can be tried. | |
584 | */ | |
585 | int nfs4_check_client_ready(struct nfs_client *clp) | |
586 | { | |
587 | if (!nfs4_has_session(clp)) | |
588 | return 0; | |
589 | if (clp->cl_cons_state < NFS_CS_READY) | |
590 | return -EPROTONOSUPPORT; | |
591 | return 0; | |
592 | } | |
593 | ||
5006a76c DH |
594 | /* |
595 | * Initialise the timeout values for a connection | |
596 | */ | |
597 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
598 | unsigned int timeo, unsigned int retrans) | |
599 | { | |
600 | to->to_initval = timeo * HZ / 10; | |
601 | to->to_retries = retrans; | |
5006a76c DH |
602 | |
603 | switch (proto) { | |
0896a725 | 604 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 605 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
606 | if (to->to_retries == 0) |
607 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 608 | if (to->to_initval == 0) |
259875ef | 609 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
610 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
611 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
612 | to->to_increment = to->to_initval; | |
613 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
614 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
615 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
616 | if (to->to_maxval < to->to_initval) | |
617 | to->to_maxval = to->to_initval; | |
5006a76c DH |
618 | to->to_exponential = 0; |
619 | break; | |
0896a725 | 620 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
621 | if (to->to_retries == 0) |
622 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 623 | if (!to->to_initval) |
259875ef | 624 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
625 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
626 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
627 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
628 | to->to_exponential = 1; | |
629 | break; | |
259875ef TM |
630 | default: |
631 | BUG(); | |
5006a76c DH |
632 | } |
633 | } | |
634 | ||
635 | /* | |
636 | * Create an RPC client handle | |
637 | */ | |
59dca3b2 | 638 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
639 | const struct rpc_timeout *timeparms, |
640 | rpc_authflavor_t flavor, | |
4a01b8a4 | 641 | int discrtry, int noresvport) |
5006a76c | 642 | { |
5006a76c | 643 | struct rpc_clnt *clnt = NULL; |
41877d20 | 644 | struct rpc_create_args args = { |
c653ce3f | 645 | .net = &init_net, |
59dca3b2 | 646 | .protocol = clp->cl_proto, |
41877d20 | 647 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 648 | .addrsize = clp->cl_addrlen, |
33170233 | 649 | .timeout = timeparms, |
41877d20 CL |
650 | .servername = clp->cl_hostname, |
651 | .program = &nfs_program, | |
652 | .version = clp->rpc_ops->version, | |
653 | .authflavor = flavor, | |
654 | }; | |
5006a76c | 655 | |
4a01b8a4 CL |
656 | if (discrtry) |
657 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
658 | if (noresvport) | |
659 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
660 | ||
5006a76c DH |
661 | if (!IS_ERR(clp->cl_rpcclient)) |
662 | return 0; | |
663 | ||
41877d20 | 664 | clnt = rpc_create(&args); |
5006a76c DH |
665 | if (IS_ERR(clnt)) { |
666 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 667 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
668 | return PTR_ERR(clnt); |
669 | } | |
670 | ||
5006a76c DH |
671 | clp->cl_rpcclient = clnt; |
672 | return 0; | |
673 | } | |
54ceac45 DH |
674 | |
675 | /* | |
676 | * Version 2 or 3 client destruction | |
677 | */ | |
678 | static void nfs_destroy_server(struct nfs_server *server) | |
679 | { | |
5eebde23 SJ |
680 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
681 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 682 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
683 | } |
684 | ||
685 | /* | |
686 | * Version 2 or 3 lockd setup | |
687 | */ | |
688 | static int nfs_start_lockd(struct nfs_server *server) | |
689 | { | |
9289e7f9 CL |
690 | struct nlm_host *host; |
691 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
692 | struct nlmclnt_initdata nlm_init = { |
693 | .hostname = clp->cl_hostname, | |
694 | .address = (struct sockaddr *)&clp->cl_addr, | |
695 | .addrlen = clp->cl_addrlen, | |
883bb163 | 696 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
697 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
698 | 1 : 0, | |
883bb163 | 699 | }; |
54ceac45 | 700 | |
883bb163 | 701 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 702 | return 0; |
5eebde23 SJ |
703 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
704 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
705 | return 0; |
706 | ||
8a6e5deb TM |
707 | switch (clp->cl_proto) { |
708 | default: | |
709 | nlm_init.protocol = IPPROTO_TCP; | |
710 | break; | |
711 | case XPRT_TRANSPORT_UDP: | |
712 | nlm_init.protocol = IPPROTO_UDP; | |
713 | } | |
714 | ||
883bb163 | 715 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
716 | if (IS_ERR(host)) |
717 | return PTR_ERR(host); | |
718 | ||
719 | server->nlm_host = host; | |
720 | server->destroy = nfs_destroy_server; | |
721 | return 0; | |
54ceac45 DH |
722 | } |
723 | ||
724 | /* | |
725 | * Initialise an NFSv3 ACL client connection | |
726 | */ | |
727 | #ifdef CONFIG_NFS_V3_ACL | |
728 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
729 | { | |
40c55319 | 730 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
731 | goto out_noacl; |
732 | if (server->flags & NFS_MOUNT_NOACL) | |
733 | goto out_noacl; | |
734 | ||
735 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
736 | if (IS_ERR(server->client_acl)) | |
737 | goto out_noacl; | |
738 | ||
739 | /* No errors! Assume that Sun nfsacls are supported */ | |
740 | server->caps |= NFS_CAP_ACLS; | |
741 | return; | |
742 | ||
743 | out_noacl: | |
744 | server->caps &= ~NFS_CAP_ACLS; | |
745 | } | |
746 | #else | |
747 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
748 | { | |
749 | server->flags &= ~NFS_MOUNT_NOACL; | |
750 | server->caps &= ~NFS_CAP_ACLS; | |
751 | } | |
752 | #endif | |
753 | ||
754 | /* | |
755 | * Create a general RPC client | |
756 | */ | |
33170233 TM |
757 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
758 | const struct rpc_timeout *timeo, | |
759 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
760 | { |
761 | struct nfs_client *clp = server->nfs_client; | |
762 | ||
763 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
764 | if (IS_ERR(server->client)) { | |
3110ff80 | 765 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
766 | return PTR_ERR(server->client); |
767 | } | |
768 | ||
33170233 TM |
769 | memcpy(&server->client->cl_timeout_default, |
770 | timeo, | |
771 | sizeof(server->client->cl_timeout_default)); | |
772 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
773 | ||
54ceac45 DH |
774 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
775 | struct rpc_auth *auth; | |
776 | ||
777 | auth = rpcauth_create(pseudoflavour, server->client); | |
778 | if (IS_ERR(auth)) { | |
3110ff80 | 779 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
780 | return PTR_ERR(auth); |
781 | } | |
782 | } | |
783 | server->client->cl_softrtry = 0; | |
784 | if (server->flags & NFS_MOUNT_SOFT) | |
785 | server->client->cl_softrtry = 1; | |
786 | ||
54ceac45 DH |
787 | return 0; |
788 | } | |
789 | ||
790 | /* | |
791 | * Initialise an NFS2 or NFS3 client | |
792 | */ | |
45a52a02 AA |
793 | int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms, |
794 | const char *ip_addr, rpc_authflavor_t authflavour, | |
795 | int noresvport) | |
54ceac45 | 796 | { |
54ceac45 DH |
797 | int error; |
798 | ||
799 | if (clp->cl_cons_state == NFS_CS_READY) { | |
800 | /* the client is already initialised */ | |
801 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
802 | return 0; | |
803 | } | |
804 | ||
54ceac45 DH |
805 | /* |
806 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
807 | * - RFC 2623, sec 2.3.2 | |
808 | */ | |
d740351b | 809 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
45a52a02 | 810 | 0, noresvport); |
54ceac45 DH |
811 | if (error < 0) |
812 | goto error; | |
813 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
814 | return 0; | |
815 | ||
816 | error: | |
817 | nfs_mark_client_ready(clp, error); | |
818 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
819 | return error; | |
820 | } | |
821 | ||
822 | /* | |
823 | * Create a version 2 or 3 client | |
824 | */ | |
2283f8d6 TT |
825 | static int nfs_init_server(struct nfs_server *server, |
826 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 827 | { |
3a498026 TM |
828 | struct nfs_client_initdata cl_init = { |
829 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 830 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 831 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 832 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 833 | .proto = data->nfs_server.protocol, |
3a498026 | 834 | }; |
33170233 | 835 | struct rpc_timeout timeparms; |
54ceac45 | 836 | struct nfs_client *clp; |
3a498026 | 837 | int error; |
54ceac45 DH |
838 | |
839 | dprintk("--> nfs_init_server()\n"); | |
840 | ||
841 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 842 | if (data->version == 3) |
40c55319 | 843 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
844 | #endif |
845 | ||
45a52a02 AA |
846 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
847 | data->timeo, data->retrans); | |
848 | ||
54ceac45 | 849 | /* Allocate or find a client reference we can use */ |
45a52a02 AA |
850 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX, |
851 | data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
852 | if (IS_ERR(clp)) { |
853 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
854 | return PTR_ERR(clp); | |
855 | } | |
856 | ||
54ceac45 DH |
857 | server->nfs_client = clp; |
858 | ||
859 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 860 | server->flags = data->flags; |
b797cac7 | 861 | server->options = data->options; |
62ab460c TM |
862 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
863 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
864 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
865 | |
866 | if (data->rsize) | |
867 | server->rsize = nfs_block_size(data->rsize, NULL); | |
868 | if (data->wsize) | |
869 | server->wsize = nfs_block_size(data->wsize, NULL); | |
870 | ||
871 | server->acregmin = data->acregmin * HZ; | |
872 | server->acregmax = data->acregmax * HZ; | |
873 | server->acdirmin = data->acdirmin * HZ; | |
874 | server->acdirmax = data->acdirmax * HZ; | |
875 | ||
876 | /* Start lockd here, before we might error out */ | |
877 | error = nfs_start_lockd(server); | |
878 | if (error < 0) | |
879 | goto error; | |
880 | ||
f22d6d79 CL |
881 | server->port = data->nfs_server.port; |
882 | ||
33170233 | 883 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
884 | if (error < 0) |
885 | goto error; | |
886 | ||
3f8400d1 CL |
887 | /* Preserve the values of mount_server-related mount options */ |
888 | if (data->mount_server.addrlen) { | |
889 | memcpy(&server->mountd_address, &data->mount_server.address, | |
890 | data->mount_server.addrlen); | |
891 | server->mountd_addrlen = data->mount_server.addrlen; | |
892 | } | |
893 | server->mountd_version = data->mount_server.version; | |
894 | server->mountd_port = data->mount_server.port; | |
895 | server->mountd_protocol = data->mount_server.protocol; | |
896 | ||
54ceac45 DH |
897 | server->namelen = data->namlen; |
898 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
899 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
900 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
901 | return 0; | |
902 | ||
903 | error: | |
904 | server->nfs_client = NULL; | |
905 | nfs_put_client(clp); | |
906 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
907 | return error; | |
908 | } | |
909 | ||
910 | /* | |
911 | * Load up the server record from information gained in an fsinfo record | |
912 | */ | |
738fd0f3 BH |
913 | static void nfs_server_set_fsinfo(struct nfs_server *server, |
914 | struct nfs_fh *mntfh, | |
915 | struct nfs_fsinfo *fsinfo) | |
54ceac45 DH |
916 | { |
917 | unsigned long max_rpc_payload; | |
918 | ||
919 | /* Work out a lot of parameters */ | |
920 | if (server->rsize == 0) | |
921 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
922 | if (server->wsize == 0) | |
923 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
924 | ||
925 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
926 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
927 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
928 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
929 | ||
930 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
931 | if (server->rsize > max_rpc_payload) | |
932 | server->rsize = max_rpc_payload; | |
933 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
934 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
935 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 936 | |
d993831f | 937 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
938 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
939 | ||
940 | if (server->wsize > max_rpc_payload) | |
941 | server->wsize = max_rpc_payload; | |
942 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
943 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
944 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
dae100c2 | 945 | server->pnfs_blksize = fsinfo->blksize; |
738fd0f3 | 946 | set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype); |
85e174ba | 947 | |
54ceac45 DH |
948 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
949 | ||
950 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
951 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
952 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
953 | if (server->dtsize > server->rsize) |
954 | server->dtsize = server->rsize; | |
955 | ||
956 | if (server->flags & NFS_MOUNT_NOAC) { | |
957 | server->acregmin = server->acregmax = 0; | |
958 | server->acdirmin = server->acdirmax = 0; | |
959 | } | |
960 | ||
961 | server->maxfilesize = fsinfo->maxfilesize; | |
962 | ||
6b96724e RL |
963 | server->time_delta = fsinfo->time_delta; |
964 | ||
54ceac45 DH |
965 | /* We're airborne Set socket buffersize */ |
966 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Probe filesystem information, including the FSID on v2/v3 | |
971 | */ | |
972 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
973 | { | |
974 | struct nfs_fsinfo fsinfo; | |
975 | struct nfs_client *clp = server->nfs_client; | |
976 | int error; | |
977 | ||
978 | dprintk("--> nfs_probe_fsinfo()\n"); | |
979 | ||
980 | if (clp->rpc_ops->set_capabilities != NULL) { | |
981 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
982 | if (error < 0) | |
983 | goto out_error; | |
984 | } | |
985 | ||
986 | fsinfo.fattr = fattr; | |
85e174ba | 987 | fsinfo.layouttype = 0; |
54ceac45 DH |
988 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
989 | if (error < 0) | |
990 | goto out_error; | |
991 | ||
738fd0f3 | 992 | nfs_server_set_fsinfo(server, mntfh, &fsinfo); |
54ceac45 DH |
993 | |
994 | /* Get some general file system info */ | |
995 | if (server->namelen == 0) { | |
996 | struct nfs_pathconf pathinfo; | |
997 | ||
998 | pathinfo.fattr = fattr; | |
999 | nfs_fattr_init(fattr); | |
1000 | ||
1001 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
1002 | server->namelen = pathinfo.max_namelen; | |
1003 | } | |
1004 | ||
1005 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
1006 | return 0; | |
1007 | ||
1008 | out_error: | |
1009 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
1010 | return error; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Copy useful information when duplicating a server record | |
1015 | */ | |
1016 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
1017 | { | |
1018 | target->flags = source->flags; | |
356e76b8 CL |
1019 | target->rsize = source->rsize; |
1020 | target->wsize = source->wsize; | |
54ceac45 DH |
1021 | target->acregmin = source->acregmin; |
1022 | target->acregmax = source->acregmax; | |
1023 | target->acdirmin = source->acdirmin; | |
1024 | target->acdirmax = source->acdirmax; | |
1025 | target->caps = source->caps; | |
2df54806 | 1026 | target->options = source->options; |
54ceac45 DH |
1027 | } |
1028 | ||
fca5238e CL |
1029 | static void nfs_server_insert_lists(struct nfs_server *server) |
1030 | { | |
1031 | struct nfs_client *clp = server->nfs_client; | |
1032 | ||
1033 | spin_lock(&nfs_client_lock); | |
1034 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); | |
1035 | list_add_tail(&server->master_link, &nfs_volume_list); | |
d3b4c9d7 | 1036 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e CL |
1037 | spin_unlock(&nfs_client_lock); |
1038 | ||
1039 | } | |
1040 | ||
1041 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1042 | { | |
d3b4c9d7 AA |
1043 | struct nfs_client *clp = server->nfs_client; |
1044 | ||
fca5238e CL |
1045 | spin_lock(&nfs_client_lock); |
1046 | list_del_rcu(&server->client_link); | |
d3b4c9d7 AA |
1047 | if (clp && list_empty(&clp->cl_superblocks)) |
1048 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
fca5238e CL |
1049 | list_del(&server->master_link); |
1050 | spin_unlock(&nfs_client_lock); | |
1051 | ||
1052 | synchronize_rcu(); | |
1053 | } | |
1054 | ||
54ceac45 DH |
1055 | /* |
1056 | * Allocate and initialise a server record | |
1057 | */ | |
1058 | static struct nfs_server *nfs_alloc_server(void) | |
1059 | { | |
1060 | struct nfs_server *server; | |
1061 | ||
1062 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1063 | if (!server) | |
1064 | return NULL; | |
1065 | ||
1066 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1067 | ||
1068 | /* Zero out the NFS state stuff */ | |
1069 | INIT_LIST_HEAD(&server->client_link); | |
1070 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1071 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1072 | INIT_LIST_HEAD(&server->layouts); |
0aaaf5c4 | 1073 | INIT_LIST_HEAD(&server->state_owners_lru); |
54ceac45 | 1074 | |
ef818a28 SD |
1075 | atomic_set(&server->active, 0); |
1076 | ||
54ceac45 DH |
1077 | server->io_stats = nfs_alloc_iostats(); |
1078 | if (!server->io_stats) { | |
1079 | kfree(server); | |
1080 | return NULL; | |
1081 | } | |
1082 | ||
48d07649 JA |
1083 | if (bdi_init(&server->backing_dev_info)) { |
1084 | nfs_free_iostats(server->io_stats); | |
1085 | kfree(server); | |
1086 | return NULL; | |
1087 | } | |
1088 | ||
f7e8917a FI |
1089 | pnfs_init_server(server); |
1090 | ||
54ceac45 DH |
1091 | return server; |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Free up a server record | |
1096 | */ | |
1097 | void nfs_free_server(struct nfs_server *server) | |
1098 | { | |
1099 | dprintk("--> nfs_free_server()\n"); | |
1100 | ||
fca5238e | 1101 | nfs_server_remove_lists(server); |
85e174ba | 1102 | unset_pnfs_layoutdriver(server); |
54ceac45 DH |
1103 | |
1104 | if (server->destroy != NULL) | |
1105 | server->destroy(server); | |
5cef338b TM |
1106 | |
1107 | if (!IS_ERR(server->client_acl)) | |
1108 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1109 | if (!IS_ERR(server->client)) |
1110 | rpc_shutdown_client(server->client); | |
1111 | ||
1112 | nfs_put_client(server->nfs_client); | |
1113 | ||
1114 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 1115 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1116 | kfree(server); |
1117 | nfs_release_automount_timer(); | |
1118 | dprintk("<-- nfs_free_server()\n"); | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * Create a version 2 or 3 volume record | |
1123 | * - keyed on server and FSID | |
1124 | */ | |
2283f8d6 | 1125 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1126 | struct nfs_fh *mntfh) |
1127 | { | |
1128 | struct nfs_server *server; | |
fbca779a | 1129 | struct nfs_fattr *fattr; |
54ceac45 DH |
1130 | int error; |
1131 | ||
1132 | server = nfs_alloc_server(); | |
1133 | if (!server) | |
1134 | return ERR_PTR(-ENOMEM); | |
1135 | ||
fbca779a TM |
1136 | error = -ENOMEM; |
1137 | fattr = nfs_alloc_fattr(); | |
1138 | if (fattr == NULL) | |
1139 | goto error; | |
1140 | ||
54ceac45 DH |
1141 | /* Get a client representation */ |
1142 | error = nfs_init_server(server, data); | |
1143 | if (error < 0) | |
1144 | goto error; | |
1145 | ||
1146 | BUG_ON(!server->nfs_client); | |
1147 | BUG_ON(!server->nfs_client->rpc_ops); | |
1148 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1149 | ||
1150 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1151 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1152 | if (error < 0) |
1153 | goto error; | |
54af3bb5 TM |
1154 | if (server->nfs_client->rpc_ops->version == 3) { |
1155 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1156 | server->namelen = NFS3_MAXNAMLEN; | |
1157 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1158 | server->caps |= NFS_CAP_READDIRPLUS; | |
1159 | } else { | |
1160 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1161 | server->namelen = NFS2_MAXNAMLEN; | |
1162 | } | |
1163 | ||
fbca779a TM |
1164 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1165 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1166 | if (error < 0) { |
1167 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1168 | goto error; | |
1169 | } | |
1170 | } | |
fbca779a | 1171 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1172 | |
6daabf1b DH |
1173 | dprintk("Server FSID: %llx:%llx\n", |
1174 | (unsigned long long) server->fsid.major, | |
1175 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1176 | |
fca5238e | 1177 | nfs_server_insert_lists(server); |
54ceac45 | 1178 | server->mount_time = jiffies; |
fbca779a | 1179 | nfs_free_fattr(fattr); |
54ceac45 DH |
1180 | return server; |
1181 | ||
1182 | error: | |
fbca779a | 1183 | nfs_free_fattr(fattr); |
54ceac45 DH |
1184 | nfs_free_server(server); |
1185 | return ERR_PTR(error); | |
1186 | } | |
1187 | ||
1188 | #ifdef CONFIG_NFS_V4 | |
c36fca52 AA |
1189 | /* |
1190 | * NFSv4.0 callback thread helper | |
1191 | * | |
1192 | * Find a client by IP address, protocol version, and minorversion | |
1193 | * | |
1194 | * Called from the pg_authenticate method. The callback identifier | |
1195 | * is not used as it has not been decoded. | |
1196 | * | |
1197 | * Returns NULL if no such client | |
1198 | */ | |
1199 | struct nfs_client * | |
1200 | nfs4_find_client_no_ident(const struct sockaddr *addr) | |
1201 | { | |
1202 | struct nfs_client *clp; | |
1203 | ||
1204 | spin_lock(&nfs_client_lock); | |
1205 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1206 | if (nfs4_cb_match_client(addr, clp, 0) == false) | |
1207 | continue; | |
1208 | atomic_inc(&clp->cl_count); | |
1209 | spin_unlock(&nfs_client_lock); | |
1210 | return clp; | |
1211 | } | |
1212 | spin_unlock(&nfs_client_lock); | |
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | /* | |
1217 | * NFSv4.0 callback thread helper | |
1218 | * | |
1219 | * Find a client by callback identifier | |
1220 | */ | |
1221 | struct nfs_client * | |
1222 | nfs4_find_client_ident(int cb_ident) | |
1223 | { | |
1224 | struct nfs_client *clp; | |
1225 | ||
1226 | spin_lock(&nfs_client_lock); | |
1227 | clp = idr_find(&cb_ident_idr, cb_ident); | |
1228 | if (clp) | |
1229 | atomic_inc(&clp->cl_count); | |
1230 | spin_unlock(&nfs_client_lock); | |
1231 | return clp; | |
1232 | } | |
1233 | ||
1234 | #if defined(CONFIG_NFS_V4_1) | |
1235 | /* | |
1236 | * NFSv4.1 callback thread helper | |
1237 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1238 | * minorversion, and sessionID | |
1239 | * | |
c36fca52 AA |
1240 | * Returns NULL if no such client |
1241 | */ | |
1242 | struct nfs_client * | |
1243 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1244 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1245 | { |
1246 | struct nfs_client *clp; | |
1247 | ||
1248 | spin_lock(&nfs_client_lock); | |
1249 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1250 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
1251 | continue; | |
1252 | ||
1253 | if (!nfs4_has_session(clp)) | |
1254 | continue; | |
1255 | ||
778be232 AA |
1256 | /* Match sessionid*/ |
1257 | if (memcmp(clp->cl_session->sess_id.data, | |
1258 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
c36fca52 AA |
1259 | continue; |
1260 | ||
1261 | atomic_inc(&clp->cl_count); | |
1262 | spin_unlock(&nfs_client_lock); | |
1263 | return clp; | |
1264 | } | |
1265 | spin_unlock(&nfs_client_lock); | |
1266 | return NULL; | |
1267 | } | |
1268 | ||
1269 | #else /* CONFIG_NFS_V4_1 */ | |
1270 | ||
1271 | struct nfs_client * | |
1272 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1273 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1274 | { |
1275 | return NULL; | |
1276 | } | |
1277 | #endif /* CONFIG_NFS_V4_1 */ | |
1278 | ||
9bdaa86d BH |
1279 | /* |
1280 | * Initialize the NFS4 callback service | |
1281 | */ | |
1282 | static int nfs4_init_callback(struct nfs_client *clp) | |
1283 | { | |
1284 | int error; | |
1285 | ||
1286 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1287 | if (nfs4_has_session(clp)) { |
1288 | error = xprt_setup_backchannel( | |
1289 | clp->cl_rpcclient->cl_xprt, | |
1290 | NFS41_BC_MIN_CALLBACKS); | |
1291 | if (error < 0) | |
1292 | return error; | |
1293 | } | |
1294 | ||
97dc1359 | 1295 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1296 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1297 | if (error < 0) { |
1298 | dprintk("%s: failed to start callback. Error = %d\n", | |
1299 | __func__, error); | |
1300 | return error; | |
1301 | } | |
1302 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1303 | } | |
1304 | return 0; | |
1305 | } | |
1306 | ||
557134a3 AA |
1307 | /* |
1308 | * Initialize the minor version specific parts of an NFS4 client record | |
1309 | */ | |
1310 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1311 | { | |
1312 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1313 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1314 | struct nfs4_session *session = NULL; |
1315 | /* | |
1316 | * Create the session and mark it expired. | |
1317 | * When a SEQUENCE operation encounters the expired session | |
1318 | * it will do session recovery to initialize it. | |
1319 | */ | |
1320 | session = nfs4_alloc_session(clp); | |
1321 | if (!session) | |
1322 | return -ENOMEM; | |
1323 | ||
1324 | clp->cl_session = session; | |
fe74ba3a TM |
1325 | /* |
1326 | * The create session reply races with the server back | |
1327 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1328 | * so that the client back channel can find the | |
1329 | * nfs_client struct | |
1330 | */ | |
1331 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1332 | } |
1333 | #endif /* CONFIG_NFS_V4_1 */ | |
1334 | ||
71468513 | 1335 | return nfs4_init_callback(clp); |
557134a3 AA |
1336 | } |
1337 | ||
54ceac45 DH |
1338 | /* |
1339 | * Initialise an NFS4 client record | |
1340 | */ | |
45a52a02 AA |
1341 | int nfs4_init_client(struct nfs_client *clp, |
1342 | const struct rpc_timeout *timeparms, | |
1343 | const char *ip_addr, | |
1344 | rpc_authflavor_t authflavour, | |
1345 | int noresvport) | |
54ceac45 DH |
1346 | { |
1347 | int error; | |
1348 | ||
1349 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1350 | /* the client is initialised already */ | |
1351 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1356 | clp->rpc_ops = &nfs_v4_clientops; | |
1357 | ||
59dca3b2 | 1358 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
45a52a02 | 1359 | 1, noresvport); |
54ceac45 DH |
1360 | if (error < 0) |
1361 | goto error; | |
f4373bf9 | 1362 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1363 | |
1364 | error = nfs_idmap_new(clp); | |
1365 | if (error < 0) { | |
1366 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1367 | __func__, error); |
54ceac45 DH |
1368 | goto error; |
1369 | } | |
9c5bf38d | 1370 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1371 | |
557134a3 AA |
1372 | error = nfs4_init_client_minor_version(clp); |
1373 | if (error < 0) | |
1374 | goto error; | |
1375 | ||
76db6d95 AA |
1376 | if (!nfs4_has_session(clp)) |
1377 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1378 | return 0; |
1379 | ||
1380 | error: | |
1381 | nfs_mark_client_ready(clp, error); | |
1382 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1383 | return error; | |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Set up an NFS4 client | |
1388 | */ | |
1389 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1390 | const char *hostname, |
1391 | const struct sockaddr *addr, | |
1392 | const size_t addrlen, | |
7d9ac06f | 1393 | const char *ip_addr, |
54ceac45 | 1394 | rpc_authflavor_t authflavour, |
94a417f3 BH |
1395 | int proto, const struct rpc_timeout *timeparms, |
1396 | u32 minorversion) | |
54ceac45 | 1397 | { |
3a498026 TM |
1398 | struct nfs_client_initdata cl_init = { |
1399 | .hostname = hostname, | |
dcecae0f CL |
1400 | .addr = addr, |
1401 | .addrlen = addrlen, | |
40c55319 | 1402 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1403 | .proto = proto, |
5aae4a9a | 1404 | .minorversion = minorversion, |
3a498026 | 1405 | }; |
54ceac45 DH |
1406 | struct nfs_client *clp; |
1407 | int error; | |
1408 | ||
1409 | dprintk("--> nfs4_set_client()\n"); | |
1410 | ||
1411 | /* Allocate or find a client reference we can use */ | |
45a52a02 AA |
1412 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour, |
1413 | server->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
1414 | if (IS_ERR(clp)) { |
1415 | error = PTR_ERR(clp); | |
1416 | goto error; | |
1417 | } | |
54ceac45 | 1418 | |
d6fb79d4 AA |
1419 | /* |
1420 | * Query for the lease time on clientid setup or renewal | |
1421 | * | |
1422 | * Note that this will be set on nfs_clients that were created | |
1423 | * only for the DS role and did not set this bit, but now will | |
1424 | * serve a dual role. | |
1425 | */ | |
1426 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
1427 | ||
54ceac45 DH |
1428 | server->nfs_client = clp; |
1429 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1430 | return 0; | |
54ceac45 DH |
1431 | error: |
1432 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1433 | return error; | |
1434 | } | |
1435 | ||
d83217c1 AA |
1436 | /* |
1437 | * Set up a pNFS Data Server client. | |
1438 | * | |
1439 | * Return any existing nfs_client that matches server address,port,version | |
1440 | * and minorversion. | |
1441 | * | |
1442 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
1443 | * low timeout interval so that if a connection is lost, we retry through | |
1444 | * the MDS. | |
1445 | */ | |
1446 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
1447 | const struct sockaddr *ds_addr, | |
1448 | int ds_addrlen, int ds_proto) | |
1449 | { | |
1450 | struct nfs_client_initdata cl_init = { | |
1451 | .addr = ds_addr, | |
1452 | .addrlen = ds_addrlen, | |
1453 | .rpc_ops = &nfs_v4_clientops, | |
1454 | .proto = ds_proto, | |
1455 | .minorversion = mds_clp->cl_minorversion, | |
1456 | }; | |
1457 | struct rpc_timeout ds_timeout = { | |
1458 | .to_initval = 15 * HZ, | |
1459 | .to_maxval = 15 * HZ, | |
1460 | .to_retries = 1, | |
1461 | .to_exponential = 1, | |
1462 | }; | |
1463 | struct nfs_client *clp; | |
1464 | ||
1465 | /* | |
1466 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1467 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1468 | * (section 13.1 RFC 5661). | |
1469 | */ | |
1470 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
1471 | mds_clp->cl_rpcclient->cl_auth->au_flavor, 0); | |
1472 | ||
1473 | dprintk("<-- %s %p\n", __func__, clp); | |
1474 | return clp; | |
1475 | } | |
94b134ac | 1476 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); |
557134a3 | 1477 | |
96b09e02 AA |
1478 | /* |
1479 | * Session has been established, and the client marked ready. | |
1480 | * Set the mount rsize and wsize with negotiated fore channel | |
1481 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1482 | */ | |
1483 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1484 | { | |
1485 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1486 | struct nfs4_session *sess; |
1487 | u32 server_resp_sz; | |
1488 | u32 server_rqst_sz; | |
1489 | ||
96b09e02 AA |
1490 | if (!nfs4_has_session(server->nfs_client)) |
1491 | return; | |
2449ea2e AB |
1492 | sess = server->nfs_client->cl_session; |
1493 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1494 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1495 | ||
1496 | if (server->rsize > server_resp_sz) | |
1497 | server->rsize = server_resp_sz; | |
1498 | if (server->wsize > server_rqst_sz) | |
1499 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1500 | #endif /* CONFIG_NFS_V4_1 */ |
1501 | } | |
1502 | ||
44950b67 TM |
1503 | static int nfs4_server_common_setup(struct nfs_server *server, |
1504 | struct nfs_fh *mntfh) | |
1505 | { | |
1506 | struct nfs_fattr *fattr; | |
1507 | int error; | |
1508 | ||
1509 | BUG_ON(!server->nfs_client); | |
1510 | BUG_ON(!server->nfs_client->rpc_ops); | |
1511 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1512 | ||
94de8b27 AA |
1513 | /* data servers support only a subset of NFSv4.1 */ |
1514 | if (is_ds_only_client(server->nfs_client)) | |
1515 | return -EPROTONOSUPPORT; | |
1516 | ||
44950b67 TM |
1517 | fattr = nfs_alloc_fattr(); |
1518 | if (fattr == NULL) | |
1519 | return -ENOMEM; | |
1520 | ||
1521 | /* We must ensure the session is initialised first */ | |
1522 | error = nfs4_init_session(server); | |
1523 | if (error < 0) | |
1524 | goto out; | |
1525 | ||
1526 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1527 | error = nfs4_get_rootfh(server, mntfh); | |
1528 | if (error < 0) | |
1529 | goto out; | |
1530 | ||
1531 | dprintk("Server FSID: %llx:%llx\n", | |
1532 | (unsigned long long) server->fsid.major, | |
1533 | (unsigned long long) server->fsid.minor); | |
1534 | dprintk("Mount FH: %d\n", mntfh->size); | |
1535 | ||
1536 | nfs4_session_set_rwsize(server); | |
1537 | ||
1538 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1539 | if (error < 0) | |
1540 | goto out; | |
1541 | ||
1542 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1543 | server->namelen = NFS4_MAXNAMLEN; | |
1544 | ||
fca5238e | 1545 | nfs_server_insert_lists(server); |
44950b67 | 1546 | server->mount_time = jiffies; |
0aaaf5c4 | 1547 | server->destroy = nfs4_destroy_server; |
44950b67 TM |
1548 | out: |
1549 | nfs_free_fattr(fattr); | |
1550 | return error; | |
1551 | } | |
1552 | ||
54ceac45 DH |
1553 | /* |
1554 | * Create a version 4 volume record | |
1555 | */ | |
1556 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1557 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1558 | { |
33170233 | 1559 | struct rpc_timeout timeparms; |
54ceac45 DH |
1560 | int error; |
1561 | ||
1562 | dprintk("--> nfs4_init_server()\n"); | |
1563 | ||
33170233 TM |
1564 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1565 | data->timeo, data->retrans); | |
1566 | ||
542fcc33 CL |
1567 | /* Initialise the client representation from the mount data */ |
1568 | server->flags = data->flags; | |
82f2e547 BS |
1569 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1570 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1571 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1572 | server->options = data->options; |
542fcc33 | 1573 | |
33170233 TM |
1574 | /* Get a client record */ |
1575 | error = nfs4_set_client(server, | |
1576 | data->nfs_server.hostname, | |
1577 | (const struct sockaddr *)&data->nfs_server.address, | |
1578 | data->nfs_server.addrlen, | |
1579 | data->client_address, | |
1580 | data->auth_flavors[0], | |
1581 | data->nfs_server.protocol, | |
94a417f3 BH |
1582 | &timeparms, |
1583 | data->minorversion); | |
33170233 TM |
1584 | if (error < 0) |
1585 | goto error; | |
1586 | ||
b064eca2 TM |
1587 | /* |
1588 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1589 | * authentication. | |
1590 | */ | |
1591 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
1592 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1593 | ||
54ceac45 DH |
1594 | if (data->rsize) |
1595 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1596 | if (data->wsize) | |
1597 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1598 | ||
1599 | server->acregmin = data->acregmin * HZ; | |
1600 | server->acregmax = data->acregmax * HZ; | |
1601 | server->acdirmin = data->acdirmin * HZ; | |
1602 | server->acdirmax = data->acdirmax * HZ; | |
1603 | ||
f22d6d79 CL |
1604 | server->port = data->nfs_server.port; |
1605 | ||
33170233 | 1606 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1607 | |
33170233 | 1608 | error: |
54ceac45 DH |
1609 | /* Done */ |
1610 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1611 | return error; | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * Create a version 4 volume record | |
1616 | * - keyed on server and FSID | |
1617 | */ | |
91ea40b9 | 1618 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1619 | struct nfs_fh *mntfh) |
1620 | { | |
54ceac45 DH |
1621 | struct nfs_server *server; |
1622 | int error; | |
1623 | ||
1624 | dprintk("--> nfs4_create_server()\n"); | |
1625 | ||
1626 | server = nfs_alloc_server(); | |
1627 | if (!server) | |
1628 | return ERR_PTR(-ENOMEM); | |
1629 | ||
54ceac45 | 1630 | /* set up the general RPC client */ |
91ea40b9 | 1631 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1632 | if (error < 0) |
1633 | goto error; | |
1634 | ||
44950b67 | 1635 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1636 | if (error < 0) |
1637 | goto error; | |
1638 | ||
54ceac45 DH |
1639 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1640 | return server; | |
1641 | ||
1642 | error: | |
1643 | nfs_free_server(server); | |
1644 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1645 | return ERR_PTR(error); | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * Create an NFS4 referral server record | |
1650 | */ | |
1651 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1652 | struct nfs_fh *mntfh) |
54ceac45 DH |
1653 | { |
1654 | struct nfs_client *parent_client; | |
1655 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1656 | int error; |
1657 | ||
1658 | dprintk("--> nfs4_create_referral_server()\n"); | |
1659 | ||
1660 | server = nfs_alloc_server(); | |
1661 | if (!server) | |
1662 | return ERR_PTR(-ENOMEM); | |
1663 | ||
1664 | parent_server = NFS_SB(data->sb); | |
1665 | parent_client = parent_server->nfs_client; | |
1666 | ||
542fcc33 CL |
1667 | /* Initialise the client representation from the parent server */ |
1668 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1669 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1670 | |
54ceac45 DH |
1671 | /* Get a client representation. |
1672 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1673 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1674 | data->addr, |
1675 | data->addrlen, | |
dcecae0f CL |
1676 | parent_client->cl_ipaddr, |
1677 | data->authflavor, | |
1678 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1679 | parent_server->client->cl_timeout, |
97dc1359 | 1680 | parent_client->cl_mvops->minor_version); |
297de4f6 AA |
1681 | if (error < 0) |
1682 | goto error; | |
54ceac45 | 1683 | |
33170233 | 1684 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
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("<-- nfs_create_referral_server() = %p\n", server); |
1693 | return server; | |
1694 | ||
1695 | error: | |
1696 | nfs_free_server(server); | |
1697 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1698 | return ERR_PTR(error); | |
1699 | } | |
1700 | ||
1701 | #endif /* CONFIG_NFS_V4 */ | |
1702 | ||
1703 | /* | |
1704 | * Clone an NFS2, NFS3 or NFS4 server record | |
1705 | */ | |
1706 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1707 | struct nfs_fh *fh, | |
1708 | struct nfs_fattr *fattr) | |
1709 | { | |
1710 | struct nfs_server *server; | |
fbca779a | 1711 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1712 | int error; |
1713 | ||
1714 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1715 | (unsigned long long) fattr->fsid.major, |
1716 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1717 | |
1718 | server = nfs_alloc_server(); | |
1719 | if (!server) | |
1720 | return ERR_PTR(-ENOMEM); | |
1721 | ||
fbca779a TM |
1722 | error = -ENOMEM; |
1723 | fattr_fsinfo = nfs_alloc_fattr(); | |
1724 | if (fattr_fsinfo == NULL) | |
1725 | goto out_free_server; | |
1726 | ||
54ceac45 DH |
1727 | /* Copy data from the source */ |
1728 | server->nfs_client = source->nfs_client; | |
0aaaf5c4 | 1729 | server->destroy = source->destroy; |
54ceac45 DH |
1730 | atomic_inc(&server->nfs_client->cl_count); |
1731 | nfs_server_copy_userdata(server, source); | |
1732 | ||
1733 | server->fsid = fattr->fsid; | |
1734 | ||
33170233 TM |
1735 | error = nfs_init_server_rpcclient(server, |
1736 | source->client->cl_timeout, | |
1737 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1738 | if (error < 0) |
1739 | goto out_free_server; | |
1740 | if (!IS_ERR(source->client_acl)) | |
1741 | nfs_init_server_aclclient(server); | |
1742 | ||
1743 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1744 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1745 | if (error < 0) |
1746 | goto out_free_server; | |
1747 | ||
54af3bb5 TM |
1748 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1749 | server->namelen = NFS4_MAXNAMLEN; | |
1750 | ||
54ceac45 | 1751 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1752 | (unsigned long long) server->fsid.major, |
1753 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1754 | |
1755 | error = nfs_start_lockd(server); | |
1756 | if (error < 0) | |
1757 | goto out_free_server; | |
1758 | ||
fca5238e | 1759 | nfs_server_insert_lists(server); |
54ceac45 DH |
1760 | server->mount_time = jiffies; |
1761 | ||
fbca779a | 1762 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1763 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1764 | return server; | |
1765 | ||
1766 | out_free_server: | |
fbca779a | 1767 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1768 | nfs_free_server(server); |
1769 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1770 | return ERR_PTR(error); | |
1771 | } | |
6aaca566 DH |
1772 | |
1773 | #ifdef CONFIG_PROC_FS | |
1774 | static struct proc_dir_entry *proc_fs_nfs; | |
1775 | ||
1776 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1777 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1778 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1779 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1780 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1781 | ||
88e9d34c | 1782 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1783 | .start = nfs_server_list_start, |
1784 | .next = nfs_server_list_next, | |
1785 | .stop = nfs_server_list_stop, | |
1786 | .show = nfs_server_list_show, | |
1787 | }; | |
1788 | ||
00977a59 | 1789 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1790 | .open = nfs_server_list_open, |
1791 | .read = seq_read, | |
1792 | .llseek = seq_lseek, | |
1793 | .release = seq_release, | |
34b37235 | 1794 | .owner = THIS_MODULE, |
6aaca566 DH |
1795 | }; |
1796 | ||
1797 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1798 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1799 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1800 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1801 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1802 | ||
88e9d34c | 1803 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1804 | .start = nfs_volume_list_start, |
1805 | .next = nfs_volume_list_next, | |
1806 | .stop = nfs_volume_list_stop, | |
1807 | .show = nfs_volume_list_show, | |
1808 | }; | |
1809 | ||
00977a59 | 1810 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1811 | .open = nfs_volume_list_open, |
1812 | .read = seq_read, | |
1813 | .llseek = seq_lseek, | |
1814 | .release = seq_release, | |
34b37235 | 1815 | .owner = THIS_MODULE, |
6aaca566 DH |
1816 | }; |
1817 | ||
1818 | /* | |
1819 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1820 | * we're dealing | |
1821 | */ | |
1822 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1823 | { | |
1824 | struct seq_file *m; | |
1825 | int ret; | |
1826 | ||
1827 | ret = seq_open(file, &nfs_server_list_ops); | |
1828 | if (ret < 0) | |
1829 | return ret; | |
1830 | ||
1831 | m = file->private_data; | |
1832 | m->private = PDE(inode)->data; | |
1833 | ||
1834 | return 0; | |
1835 | } | |
1836 | ||
1837 | /* | |
1838 | * set up the iterator to start reading from the server list and return the first item | |
1839 | */ | |
1840 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1841 | { | |
6aaca566 DH |
1842 | /* lock the list against modification */ |
1843 | spin_lock(&nfs_client_lock); | |
259902ea | 1844 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1845 | } |
1846 | ||
1847 | /* | |
1848 | * move to next server | |
1849 | */ | |
1850 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1851 | { | |
259902ea | 1852 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1853 | } |
1854 | ||
1855 | /* | |
1856 | * clean up after reading from the transports list | |
1857 | */ | |
1858 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1859 | { | |
1860 | spin_unlock(&nfs_client_lock); | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * display a header line followed by a load of call lines | |
1865 | */ | |
1866 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1867 | { | |
1868 | struct nfs_client *clp; | |
1869 | ||
1870 | /* display header on line 1 */ | |
259902ea | 1871 | if (v == &nfs_client_list) { |
6aaca566 DH |
1872 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1873 | return 0; | |
1874 | } | |
1875 | ||
1876 | /* display one transport per line on subsequent lines */ | |
1877 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1878 | ||
940aab49 MN |
1879 | /* Check if the client is initialized */ |
1880 | if (clp->cl_cons_state != NFS_CS_READY) | |
1881 | return 0; | |
1882 | ||
5d8515ca | 1883 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1884 | clp->rpc_ops->version, |
5d8515ca CL |
1885 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1886 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1887 | atomic_read(&clp->cl_count), |
1888 | clp->cl_hostname); | |
1889 | ||
1890 | return 0; | |
1891 | } | |
1892 | ||
1893 | /* | |
1894 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1895 | */ | |
1896 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1897 | { | |
1898 | struct seq_file *m; | |
1899 | int ret; | |
1900 | ||
1901 | ret = seq_open(file, &nfs_volume_list_ops); | |
1902 | if (ret < 0) | |
1903 | return ret; | |
1904 | ||
1905 | m = file->private_data; | |
1906 | m->private = PDE(inode)->data; | |
1907 | ||
1908 | return 0; | |
1909 | } | |
1910 | ||
1911 | /* | |
1912 | * set up the iterator to start reading from the volume list and return the first item | |
1913 | */ | |
1914 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1915 | { | |
6aaca566 DH |
1916 | /* lock the list against modification */ |
1917 | spin_lock(&nfs_client_lock); | |
259902ea | 1918 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1919 | } |
1920 | ||
1921 | /* | |
1922 | * move to next volume | |
1923 | */ | |
1924 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1925 | { | |
259902ea | 1926 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1927 | } |
1928 | ||
1929 | /* | |
1930 | * clean up after reading from the transports list | |
1931 | */ | |
1932 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1933 | { | |
1934 | spin_unlock(&nfs_client_lock); | |
1935 | } | |
1936 | ||
1937 | /* | |
1938 | * display a header line followed by a load of call lines | |
1939 | */ | |
1940 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1941 | { | |
1942 | struct nfs_server *server; | |
1943 | struct nfs_client *clp; | |
1944 | char dev[8], fsid[17]; | |
1945 | ||
1946 | /* display header on line 1 */ | |
259902ea | 1947 | if (v == &nfs_volume_list) { |
5d1acff1 | 1948 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1949 | return 0; |
1950 | } | |
1951 | /* display one transport per line on subsequent lines */ | |
1952 | server = list_entry(v, struct nfs_server, master_link); | |
1953 | clp = server->nfs_client; | |
1954 | ||
1955 | snprintf(dev, 8, "%u:%u", | |
1956 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1957 | ||
1958 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1959 | (unsigned long long) server->fsid.major, |
1960 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1961 | |
5d1acff1 | 1962 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1963 | clp->rpc_ops->version, |
5d8515ca CL |
1964 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1965 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1966 | dev, |
5d1acff1 DH |
1967 | fsid, |
1968 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1969 | |
1970 | return 0; | |
1971 | } | |
1972 | ||
1973 | /* | |
1974 | * initialise the /proc/fs/nfsfs/ directory | |
1975 | */ | |
1976 | int __init nfs_fs_proc_init(void) | |
1977 | { | |
1978 | struct proc_dir_entry *p; | |
1979 | ||
36a5aeb8 | 1980 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1981 | if (!proc_fs_nfs) |
1982 | goto error_0; | |
1983 | ||
6aaca566 | 1984 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1985 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1986 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1987 | if (!p) |
1988 | goto error_1; | |
1989 | ||
6aaca566 | 1990 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1991 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1992 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1993 | if (!p) |
1994 | goto error_2; | |
6aaca566 DH |
1995 | return 0; |
1996 | ||
1997 | error_2: | |
1998 | remove_proc_entry("servers", proc_fs_nfs); | |
1999 | error_1: | |
36a5aeb8 | 2000 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
2001 | error_0: |
2002 | return -ENOMEM; | |
2003 | } | |
2004 | ||
2005 | /* | |
2006 | * clean up the /proc/fs/nfsfs/ directory | |
2007 | */ | |
2008 | void nfs_fs_proc_exit(void) | |
2009 | { | |
2010 | remove_proc_entry("volumes", proc_fs_nfs); | |
2011 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 2012 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
2013 | } |
2014 | ||
2015 | #endif /* CONFIG_PROC_FS */ | |
b064eca2 TM |
2016 | |
2017 | module_param(nfs4_disable_idmapping, bool, 0644); | |
2018 | MODULE_PARM_DESC(nfs4_disable_idmapping, | |
2019 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |