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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 | */ | |
87 | static int nfs4_disable_idmapping = 0; | |
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, | |
108 | .pipe_dir_name = "/nfs", | |
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 |
7c67db3a TM |
188 | cred = rpc_lookup_machine_cred(); |
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 | ||
888ef2e3 AB |
253 | #else |
254 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
255 | { | |
256 | } | |
f4eecd5d AA |
257 | |
258 | void nfs_cleanup_cb_ident_idr(void) | |
259 | { | |
260 | } | |
261 | ||
262 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
263 | { | |
264 | } | |
f7e8917a FI |
265 | |
266 | static void pnfs_init_server(struct nfs_server *server) | |
267 | { | |
268 | } | |
269 | ||
888ef2e3 | 270 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 271 | |
24c8dbbb DH |
272 | /* |
273 | * Destroy a shared client record | |
274 | */ | |
275 | static void nfs_free_client(struct nfs_client *clp) | |
276 | { | |
40c55319 | 277 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 278 | |
5dd3177a | 279 | nfs4_shutdown_client(clp); |
24c8dbbb | 280 | |
14727281 DH |
281 | nfs_fscache_release_client_cookie(clp); |
282 | ||
24c8dbbb DH |
283 | /* -EIO all pending I/O */ |
284 | if (!IS_ERR(clp->cl_rpcclient)) | |
285 | rpc_shutdown_client(clp->cl_rpcclient); | |
286 | ||
7c67db3a TM |
287 | if (clp->cl_machine_cred != NULL) |
288 | put_rpccred(clp->cl_machine_cred); | |
289 | ||
1775bc34 BH |
290 | nfs4_deviceid_purge_client(clp); |
291 | ||
24c8dbbb | 292 | kfree(clp->cl_hostname); |
78fe0f41 | 293 | kfree(clp->server_scope); |
24c8dbbb DH |
294 | kfree(clp); |
295 | ||
296 | dprintk("<-- nfs_free_client()\n"); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Release a reference to a shared client record | |
301 | */ | |
302 | void nfs_put_client(struct nfs_client *clp) | |
303 | { | |
27ba8512 DH |
304 | if (!clp) |
305 | return; | |
306 | ||
24c8dbbb DH |
307 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
308 | ||
309 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
310 | list_del(&clp->cl_share_link); | |
f4eecd5d | 311 | nfs_cb_idr_remove_locked(clp); |
24c8dbbb DH |
312 | spin_unlock(&nfs_client_lock); |
313 | ||
314 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
315 | ||
316 | nfs_free_client(clp); | |
317 | } | |
318 | } | |
16b374ca | 319 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 320 | |
9082a5cc | 321 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
322 | /* |
323 | * Test if two ip6 socket addresses refer to the same socket by | |
324 | * comparing relevant fields. The padding bytes specifically, are not | |
325 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
326 | * and sin6_scope_id is only compared if the address is "link local" | |
327 | * because "link local" addresses need only be unique to a specific | |
328 | * link. Conversely, ordinary unicast addresses might have different | |
329 | * sin6_scope_id. | |
330 | * | |
331 | * The caller should ensure both socket addresses are AF_INET6. | |
332 | */ | |
3c8c45df CL |
333 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
334 | const struct sockaddr *sa2) | |
9f4c899c | 335 | { |
3c8c45df CL |
336 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
337 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 338 | |
3c8c45df CL |
339 | if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && |
340 | sin1->sin6_scope_id != sin2->sin6_scope_id) | |
9f4c899c | 341 | return 0; |
3b0d3f93 | 342 | |
b20d37ca | 343 | return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); |
3b0d3f93 | 344 | } |
3c8c45df CL |
345 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
346 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
347 | const struct sockaddr *sa2) | |
9f4c899c TM |
348 | { |
349 | return 0; | |
350 | } | |
9082a5cc | 351 | #endif |
3b0d3f93 | 352 | |
d7371c41 ID |
353 | /* |
354 | * Test if two ip4 socket addresses refer to the same socket, by | |
355 | * comparing relevant fields. The padding bytes specifically, are | |
356 | * not compared. | |
357 | * | |
358 | * The caller should ensure both socket addresses are AF_INET. | |
359 | */ | |
3c8c45df CL |
360 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
361 | const struct sockaddr *sa2) | |
362 | { | |
363 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
364 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
365 | ||
366 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
367 | } | |
368 | ||
369 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
370 | const struct sockaddr *sa2) | |
371 | { | |
372 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
373 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
374 | ||
375 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
376 | (sin1->sin6_port == sin2->sin6_port); | |
377 | } | |
378 | ||
9f4c899c TM |
379 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
380 | const struct sockaddr *sa2) | |
d7371c41 | 381 | { |
3c8c45df CL |
382 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
383 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 384 | |
3c8c45df CL |
385 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
386 | (sin1->sin_port == sin2->sin_port); | |
387 | } | |
388 | ||
389 | /* | |
390 | * Test if two socket addresses represent the same actual socket, | |
391 | * by comparing (only) relevant fields, excluding the port number. | |
392 | */ | |
393 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
394 | const struct sockaddr *sa2) | |
395 | { | |
396 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 397 | return 0; |
3c8c45df CL |
398 | |
399 | switch (sa1->sa_family) { | |
400 | case AF_INET: | |
401 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
402 | case AF_INET6: | |
403 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
404 | } | |
405 | return 0; | |
d7371c41 ID |
406 | } |
407 | ||
d7371c41 ID |
408 | /* |
409 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 410 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
411 | */ |
412 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
413 | const struct sockaddr *sa2) | |
414 | { | |
415 | if (sa1->sa_family != sa2->sa_family) | |
416 | return 0; | |
417 | ||
418 | switch (sa1->sa_family) { | |
419 | case AF_INET: | |
9f4c899c | 420 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 421 | case AF_INET6: |
9f4c899c | 422 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
423 | } |
424 | return 0; | |
425 | } | |
426 | ||
c36fca52 AA |
427 | /* Common match routine for v4.0 and v4.1 callback services */ |
428 | bool | |
429 | nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp, | |
430 | u32 minorversion) | |
24c8dbbb | 431 | { |
c36fca52 | 432 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
24c8dbbb | 433 | |
c36fca52 AA |
434 | /* Don't match clients that failed to initialise */ |
435 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
436 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
437 | return false; | |
3b0d3f93 | 438 | |
c36fca52 AA |
439 | /* Match the version and minorversion */ |
440 | if (clp->rpc_ops->version != 4 || | |
441 | clp->cl_minorversion != minorversion) | |
442 | return false; | |
13bbc06a | 443 | |
c36fca52 AA |
444 | /* Match only the IP address, not the port number */ |
445 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
446 | return false; | |
24c8dbbb | 447 | |
c36fca52 | 448 | return true; |
3fbd67ad TM |
449 | } |
450 | ||
24c8dbbb | 451 | /* |
c81468a1 TM |
452 | * Find an nfs_client on the list that matches the initialisation data |
453 | * that is supplied. | |
24c8dbbb | 454 | */ |
c81468a1 | 455 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
456 | { |
457 | struct nfs_client *clp; | |
d7371c41 | 458 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 459 | |
c81468a1 | 460 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 461 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
462 | /* Don't match clients that failed to initialise properly */ |
463 | if (clp->cl_cons_state < 0) | |
464 | continue; | |
465 | ||
466 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 467 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
468 | continue; |
469 | ||
59dca3b2 TM |
470 | if (clp->cl_proto != data->proto) |
471 | continue; | |
5aae4a9a BH |
472 | /* Match nfsv4 minorversion */ |
473 | if (clp->cl_minorversion != data->minorversion) | |
474 | continue; | |
c81468a1 | 475 | /* Match the full socket address */ |
d7371c41 | 476 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
477 | continue; |
478 | ||
479 | atomic_inc(&clp->cl_count); | |
480 | return clp; | |
13bbc06a | 481 | } |
c81468a1 | 482 | return NULL; |
24c8dbbb DH |
483 | } |
484 | ||
485 | /* | |
486 | * Look up a client by IP address and protocol version | |
487 | * - creates a new record if one doesn't yet exist | |
488 | */ | |
45a52a02 AA |
489 | static struct nfs_client * |
490 | nfs_get_client(const struct nfs_client_initdata *cl_init, | |
491 | const struct rpc_timeout *timeparms, | |
492 | const char *ip_addr, | |
493 | rpc_authflavor_t authflavour, | |
494 | int noresvport) | |
24c8dbbb DH |
495 | { |
496 | struct nfs_client *clp, *new = NULL; | |
497 | int error; | |
498 | ||
d7422c47 CL |
499 | dprintk("--> nfs_get_client(%s,v%u)\n", |
500 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
501 | |
502 | /* see if the client already exists */ | |
503 | do { | |
504 | spin_lock(&nfs_client_lock); | |
505 | ||
c81468a1 | 506 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
507 | if (clp) |
508 | goto found_client; | |
509 | if (new) | |
510 | goto install_client; | |
511 | ||
512 | spin_unlock(&nfs_client_lock); | |
513 | ||
3a498026 | 514 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 515 | } while (!IS_ERR(new)); |
24c8dbbb | 516 | |
a21bdd9b CL |
517 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
518 | return new; | |
24c8dbbb DH |
519 | |
520 | /* install a new client and return with it unready */ | |
521 | install_client: | |
522 | clp = new; | |
523 | list_add(&clp->cl_share_link, &nfs_client_list); | |
524 | spin_unlock(&nfs_client_lock); | |
45a52a02 AA |
525 | |
526 | error = cl_init->rpc_ops->init_client(clp, timeparms, ip_addr, | |
527 | authflavour, noresvport); | |
528 | if (error < 0) { | |
529 | nfs_put_client(clp); | |
530 | return ERR_PTR(error); | |
531 | } | |
24c8dbbb DH |
532 | dprintk("--> nfs_get_client() = %p [new]\n", clp); |
533 | return clp; | |
534 | ||
535 | /* found an existing client | |
536 | * - make sure it's ready before returning | |
537 | */ | |
538 | found_client: | |
539 | spin_unlock(&nfs_client_lock); | |
540 | ||
541 | if (new) | |
542 | nfs_free_client(new); | |
543 | ||
150030b7 | 544 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 545 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
546 | if (error < 0) { |
547 | nfs_put_client(clp); | |
548 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
549 | } |
550 | ||
551 | if (clp->cl_cons_state < NFS_CS_READY) { | |
552 | error = clp->cl_cons_state; | |
553 | nfs_put_client(clp); | |
554 | return ERR_PTR(error); | |
555 | } | |
556 | ||
54ceac45 DH |
557 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
558 | ||
24c8dbbb DH |
559 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
560 | return clp; | |
561 | } | |
562 | ||
563 | /* | |
564 | * Mark a server as ready or failed | |
565 | */ | |
76db6d95 | 566 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
567 | { |
568 | clp->cl_cons_state = state; | |
569 | wake_up_all(&nfs_client_active_wq); | |
570 | } | |
5006a76c | 571 | |
008f55d0 BH |
572 | /* |
573 | * With sessions, the client is not marked ready until after a | |
574 | * successful EXCHANGE_ID and CREATE_SESSION. | |
575 | * | |
576 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
577 | * other versions of NFS can be tried. | |
578 | */ | |
579 | int nfs4_check_client_ready(struct nfs_client *clp) | |
580 | { | |
581 | if (!nfs4_has_session(clp)) | |
582 | return 0; | |
583 | if (clp->cl_cons_state < NFS_CS_READY) | |
584 | return -EPROTONOSUPPORT; | |
585 | return 0; | |
586 | } | |
587 | ||
5006a76c DH |
588 | /* |
589 | * Initialise the timeout values for a connection | |
590 | */ | |
591 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
592 | unsigned int timeo, unsigned int retrans) | |
593 | { | |
594 | to->to_initval = timeo * HZ / 10; | |
595 | to->to_retries = retrans; | |
5006a76c DH |
596 | |
597 | switch (proto) { | |
0896a725 | 598 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 599 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
600 | if (to->to_retries == 0) |
601 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 602 | if (to->to_initval == 0) |
259875ef | 603 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
604 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
605 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
606 | to->to_increment = to->to_initval; | |
607 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
608 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
609 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
610 | if (to->to_maxval < to->to_initval) | |
611 | to->to_maxval = to->to_initval; | |
5006a76c DH |
612 | to->to_exponential = 0; |
613 | break; | |
0896a725 | 614 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
615 | if (to->to_retries == 0) |
616 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 617 | if (!to->to_initval) |
259875ef | 618 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
619 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
620 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
621 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
622 | to->to_exponential = 1; | |
623 | break; | |
259875ef TM |
624 | default: |
625 | BUG(); | |
5006a76c DH |
626 | } |
627 | } | |
628 | ||
629 | /* | |
630 | * Create an RPC client handle | |
631 | */ | |
59dca3b2 | 632 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
633 | const struct rpc_timeout *timeparms, |
634 | rpc_authflavor_t flavor, | |
4a01b8a4 | 635 | int discrtry, int noresvport) |
5006a76c | 636 | { |
5006a76c | 637 | struct rpc_clnt *clnt = NULL; |
41877d20 | 638 | struct rpc_create_args args = { |
c653ce3f | 639 | .net = &init_net, |
59dca3b2 | 640 | .protocol = clp->cl_proto, |
41877d20 | 641 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 642 | .addrsize = clp->cl_addrlen, |
33170233 | 643 | .timeout = timeparms, |
41877d20 CL |
644 | .servername = clp->cl_hostname, |
645 | .program = &nfs_program, | |
646 | .version = clp->rpc_ops->version, | |
647 | .authflavor = flavor, | |
648 | }; | |
5006a76c | 649 | |
4a01b8a4 CL |
650 | if (discrtry) |
651 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
652 | if (noresvport) | |
653 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
654 | ||
5006a76c DH |
655 | if (!IS_ERR(clp->cl_rpcclient)) |
656 | return 0; | |
657 | ||
41877d20 | 658 | clnt = rpc_create(&args); |
5006a76c DH |
659 | if (IS_ERR(clnt)) { |
660 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 661 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
662 | return PTR_ERR(clnt); |
663 | } | |
664 | ||
5006a76c DH |
665 | clp->cl_rpcclient = clnt; |
666 | return 0; | |
667 | } | |
54ceac45 DH |
668 | |
669 | /* | |
670 | * Version 2 or 3 client destruction | |
671 | */ | |
672 | static void nfs_destroy_server(struct nfs_server *server) | |
673 | { | |
5eebde23 SJ |
674 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
675 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 676 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
677 | } |
678 | ||
679 | /* | |
680 | * Version 2 or 3 lockd setup | |
681 | */ | |
682 | static int nfs_start_lockd(struct nfs_server *server) | |
683 | { | |
9289e7f9 CL |
684 | struct nlm_host *host; |
685 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
686 | struct nlmclnt_initdata nlm_init = { |
687 | .hostname = clp->cl_hostname, | |
688 | .address = (struct sockaddr *)&clp->cl_addr, | |
689 | .addrlen = clp->cl_addrlen, | |
883bb163 | 690 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
691 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
692 | 1 : 0, | |
883bb163 | 693 | }; |
54ceac45 | 694 | |
883bb163 | 695 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 696 | return 0; |
5eebde23 SJ |
697 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
698 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
699 | return 0; |
700 | ||
8a6e5deb TM |
701 | switch (clp->cl_proto) { |
702 | default: | |
703 | nlm_init.protocol = IPPROTO_TCP; | |
704 | break; | |
705 | case XPRT_TRANSPORT_UDP: | |
706 | nlm_init.protocol = IPPROTO_UDP; | |
707 | } | |
708 | ||
883bb163 | 709 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
710 | if (IS_ERR(host)) |
711 | return PTR_ERR(host); | |
712 | ||
713 | server->nlm_host = host; | |
714 | server->destroy = nfs_destroy_server; | |
715 | return 0; | |
54ceac45 DH |
716 | } |
717 | ||
718 | /* | |
719 | * Initialise an NFSv3 ACL client connection | |
720 | */ | |
721 | #ifdef CONFIG_NFS_V3_ACL | |
722 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
723 | { | |
40c55319 | 724 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
725 | goto out_noacl; |
726 | if (server->flags & NFS_MOUNT_NOACL) | |
727 | goto out_noacl; | |
728 | ||
729 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
730 | if (IS_ERR(server->client_acl)) | |
731 | goto out_noacl; | |
732 | ||
733 | /* No errors! Assume that Sun nfsacls are supported */ | |
734 | server->caps |= NFS_CAP_ACLS; | |
735 | return; | |
736 | ||
737 | out_noacl: | |
738 | server->caps &= ~NFS_CAP_ACLS; | |
739 | } | |
740 | #else | |
741 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
742 | { | |
743 | server->flags &= ~NFS_MOUNT_NOACL; | |
744 | server->caps &= ~NFS_CAP_ACLS; | |
745 | } | |
746 | #endif | |
747 | ||
748 | /* | |
749 | * Create a general RPC client | |
750 | */ | |
33170233 TM |
751 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
752 | const struct rpc_timeout *timeo, | |
753 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
754 | { |
755 | struct nfs_client *clp = server->nfs_client; | |
756 | ||
757 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
758 | if (IS_ERR(server->client)) { | |
3110ff80 | 759 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
760 | return PTR_ERR(server->client); |
761 | } | |
762 | ||
33170233 TM |
763 | memcpy(&server->client->cl_timeout_default, |
764 | timeo, | |
765 | sizeof(server->client->cl_timeout_default)); | |
766 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
767 | ||
54ceac45 DH |
768 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
769 | struct rpc_auth *auth; | |
770 | ||
771 | auth = rpcauth_create(pseudoflavour, server->client); | |
772 | if (IS_ERR(auth)) { | |
3110ff80 | 773 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
774 | return PTR_ERR(auth); |
775 | } | |
776 | } | |
777 | server->client->cl_softrtry = 0; | |
778 | if (server->flags & NFS_MOUNT_SOFT) | |
779 | server->client->cl_softrtry = 1; | |
780 | ||
54ceac45 DH |
781 | return 0; |
782 | } | |
783 | ||
784 | /* | |
785 | * Initialise an NFS2 or NFS3 client | |
786 | */ | |
45a52a02 AA |
787 | int nfs_init_client(struct nfs_client *clp, const struct rpc_timeout *timeparms, |
788 | const char *ip_addr, rpc_authflavor_t authflavour, | |
789 | int noresvport) | |
54ceac45 | 790 | { |
54ceac45 DH |
791 | int error; |
792 | ||
793 | if (clp->cl_cons_state == NFS_CS_READY) { | |
794 | /* the client is already initialised */ | |
795 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
796 | return 0; | |
797 | } | |
798 | ||
54ceac45 DH |
799 | /* |
800 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
801 | * - RFC 2623, sec 2.3.2 | |
802 | */ | |
d740351b | 803 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
45a52a02 | 804 | 0, noresvport); |
54ceac45 DH |
805 | if (error < 0) |
806 | goto error; | |
807 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
808 | return 0; | |
809 | ||
810 | error: | |
811 | nfs_mark_client_ready(clp, error); | |
812 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
813 | return error; | |
814 | } | |
815 | ||
816 | /* | |
817 | * Create a version 2 or 3 client | |
818 | */ | |
2283f8d6 TT |
819 | static int nfs_init_server(struct nfs_server *server, |
820 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 821 | { |
3a498026 TM |
822 | struct nfs_client_initdata cl_init = { |
823 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 824 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 825 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 826 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 827 | .proto = data->nfs_server.protocol, |
3a498026 | 828 | }; |
33170233 | 829 | struct rpc_timeout timeparms; |
54ceac45 | 830 | struct nfs_client *clp; |
3a498026 | 831 | int error; |
54ceac45 DH |
832 | |
833 | dprintk("--> nfs_init_server()\n"); | |
834 | ||
835 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 836 | if (data->version == 3) |
40c55319 | 837 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
838 | #endif |
839 | ||
45a52a02 AA |
840 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
841 | data->timeo, data->retrans); | |
842 | ||
54ceac45 | 843 | /* Allocate or find a client reference we can use */ |
45a52a02 AA |
844 | clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX, |
845 | data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
846 | if (IS_ERR(clp)) { |
847 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
848 | return PTR_ERR(clp); | |
849 | } | |
850 | ||
54ceac45 DH |
851 | server->nfs_client = clp; |
852 | ||
853 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 854 | server->flags = data->flags; |
b797cac7 | 855 | server->options = data->options; |
62ab460c TM |
856 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
857 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
858 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
859 | |
860 | if (data->rsize) | |
861 | server->rsize = nfs_block_size(data->rsize, NULL); | |
862 | if (data->wsize) | |
863 | server->wsize = nfs_block_size(data->wsize, NULL); | |
864 | ||
865 | server->acregmin = data->acregmin * HZ; | |
866 | server->acregmax = data->acregmax * HZ; | |
867 | server->acdirmin = data->acdirmin * HZ; | |
868 | server->acdirmax = data->acdirmax * HZ; | |
869 | ||
870 | /* Start lockd here, before we might error out */ | |
871 | error = nfs_start_lockd(server); | |
872 | if (error < 0) | |
873 | goto error; | |
874 | ||
f22d6d79 CL |
875 | server->port = data->nfs_server.port; |
876 | ||
33170233 | 877 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
878 | if (error < 0) |
879 | goto error; | |
880 | ||
3f8400d1 CL |
881 | /* Preserve the values of mount_server-related mount options */ |
882 | if (data->mount_server.addrlen) { | |
883 | memcpy(&server->mountd_address, &data->mount_server.address, | |
884 | data->mount_server.addrlen); | |
885 | server->mountd_addrlen = data->mount_server.addrlen; | |
886 | } | |
887 | server->mountd_version = data->mount_server.version; | |
888 | server->mountd_port = data->mount_server.port; | |
889 | server->mountd_protocol = data->mount_server.protocol; | |
890 | ||
54ceac45 DH |
891 | server->namelen = data->namlen; |
892 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
893 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
894 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
895 | return 0; | |
896 | ||
897 | error: | |
898 | server->nfs_client = NULL; | |
899 | nfs_put_client(clp); | |
900 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
901 | return error; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Load up the server record from information gained in an fsinfo record | |
906 | */ | |
907 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
908 | { | |
909 | unsigned long max_rpc_payload; | |
910 | ||
911 | /* Work out a lot of parameters */ | |
912 | if (server->rsize == 0) | |
913 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
914 | if (server->wsize == 0) | |
915 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
916 | ||
917 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
918 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
919 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
920 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
921 | ||
922 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
923 | if (server->rsize > max_rpc_payload) | |
924 | server->rsize = max_rpc_payload; | |
925 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
926 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
927 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 928 | |
d993831f | 929 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
930 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
931 | ||
932 | if (server->wsize > max_rpc_payload) | |
933 | server->wsize = max_rpc_payload; | |
934 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
935 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
936 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
85e174ba RL |
937 | set_pnfs_layoutdriver(server, fsinfo->layouttype); |
938 | ||
54ceac45 DH |
939 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
940 | ||
941 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
942 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
943 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
944 | if (server->dtsize > server->rsize) |
945 | server->dtsize = server->rsize; | |
946 | ||
947 | if (server->flags & NFS_MOUNT_NOAC) { | |
948 | server->acregmin = server->acregmax = 0; | |
949 | server->acdirmin = server->acdirmax = 0; | |
950 | } | |
951 | ||
952 | server->maxfilesize = fsinfo->maxfilesize; | |
953 | ||
6b96724e RL |
954 | server->time_delta = fsinfo->time_delta; |
955 | ||
54ceac45 DH |
956 | /* We're airborne Set socket buffersize */ |
957 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
958 | } | |
959 | ||
960 | /* | |
961 | * Probe filesystem information, including the FSID on v2/v3 | |
962 | */ | |
963 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
964 | { | |
965 | struct nfs_fsinfo fsinfo; | |
966 | struct nfs_client *clp = server->nfs_client; | |
967 | int error; | |
968 | ||
969 | dprintk("--> nfs_probe_fsinfo()\n"); | |
970 | ||
971 | if (clp->rpc_ops->set_capabilities != NULL) { | |
972 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
973 | if (error < 0) | |
974 | goto out_error; | |
975 | } | |
976 | ||
977 | fsinfo.fattr = fattr; | |
85e174ba | 978 | fsinfo.layouttype = 0; |
54ceac45 DH |
979 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
980 | if (error < 0) | |
981 | goto out_error; | |
982 | ||
983 | nfs_server_set_fsinfo(server, &fsinfo); | |
984 | ||
985 | /* Get some general file system info */ | |
986 | if (server->namelen == 0) { | |
987 | struct nfs_pathconf pathinfo; | |
988 | ||
989 | pathinfo.fattr = fattr; | |
990 | nfs_fattr_init(fattr); | |
991 | ||
992 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
993 | server->namelen = pathinfo.max_namelen; | |
994 | } | |
995 | ||
996 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
997 | return 0; | |
998 | ||
999 | out_error: | |
1000 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
1001 | return error; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Copy useful information when duplicating a server record | |
1006 | */ | |
1007 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
1008 | { | |
1009 | target->flags = source->flags; | |
356e76b8 CL |
1010 | target->rsize = source->rsize; |
1011 | target->wsize = source->wsize; | |
54ceac45 DH |
1012 | target->acregmin = source->acregmin; |
1013 | target->acregmax = source->acregmax; | |
1014 | target->acdirmin = source->acdirmin; | |
1015 | target->acdirmax = source->acdirmax; | |
1016 | target->caps = source->caps; | |
2df54806 | 1017 | target->options = source->options; |
54ceac45 DH |
1018 | } |
1019 | ||
fca5238e CL |
1020 | static void nfs_server_insert_lists(struct nfs_server *server) |
1021 | { | |
1022 | struct nfs_client *clp = server->nfs_client; | |
1023 | ||
1024 | spin_lock(&nfs_client_lock); | |
1025 | list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); | |
1026 | list_add_tail(&server->master_link, &nfs_volume_list); | |
d3b4c9d7 | 1027 | clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); |
fca5238e CL |
1028 | spin_unlock(&nfs_client_lock); |
1029 | ||
1030 | } | |
1031 | ||
1032 | static void nfs_server_remove_lists(struct nfs_server *server) | |
1033 | { | |
d3b4c9d7 AA |
1034 | struct nfs_client *clp = server->nfs_client; |
1035 | ||
fca5238e CL |
1036 | spin_lock(&nfs_client_lock); |
1037 | list_del_rcu(&server->client_link); | |
d3b4c9d7 AA |
1038 | if (clp && list_empty(&clp->cl_superblocks)) |
1039 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
fca5238e CL |
1040 | list_del(&server->master_link); |
1041 | spin_unlock(&nfs_client_lock); | |
1042 | ||
1043 | synchronize_rcu(); | |
1044 | } | |
1045 | ||
54ceac45 DH |
1046 | /* |
1047 | * Allocate and initialise a server record | |
1048 | */ | |
1049 | static struct nfs_server *nfs_alloc_server(void) | |
1050 | { | |
1051 | struct nfs_server *server; | |
1052 | ||
1053 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1054 | if (!server) | |
1055 | return NULL; | |
1056 | ||
1057 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1058 | ||
1059 | /* Zero out the NFS state stuff */ | |
1060 | INIT_LIST_HEAD(&server->client_link); | |
1061 | INIT_LIST_HEAD(&server->master_link); | |
d3978bb3 | 1062 | INIT_LIST_HEAD(&server->delegations); |
6382a441 | 1063 | INIT_LIST_HEAD(&server->layouts); |
54ceac45 | 1064 | |
ef818a28 SD |
1065 | atomic_set(&server->active, 0); |
1066 | ||
54ceac45 DH |
1067 | server->io_stats = nfs_alloc_iostats(); |
1068 | if (!server->io_stats) { | |
1069 | kfree(server); | |
1070 | return NULL; | |
1071 | } | |
1072 | ||
48d07649 JA |
1073 | if (bdi_init(&server->backing_dev_info)) { |
1074 | nfs_free_iostats(server->io_stats); | |
1075 | kfree(server); | |
1076 | return NULL; | |
1077 | } | |
1078 | ||
f7e8917a FI |
1079 | pnfs_init_server(server); |
1080 | ||
54ceac45 DH |
1081 | return server; |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * Free up a server record | |
1086 | */ | |
1087 | void nfs_free_server(struct nfs_server *server) | |
1088 | { | |
1089 | dprintk("--> nfs_free_server()\n"); | |
1090 | ||
fca5238e | 1091 | nfs_server_remove_lists(server); |
85e174ba | 1092 | unset_pnfs_layoutdriver(server); |
54ceac45 DH |
1093 | |
1094 | if (server->destroy != NULL) | |
1095 | server->destroy(server); | |
5cef338b TM |
1096 | |
1097 | if (!IS_ERR(server->client_acl)) | |
1098 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1099 | if (!IS_ERR(server->client)) |
1100 | rpc_shutdown_client(server->client); | |
1101 | ||
1102 | nfs_put_client(server->nfs_client); | |
1103 | ||
1104 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 1105 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1106 | kfree(server); |
1107 | nfs_release_automount_timer(); | |
1108 | dprintk("<-- nfs_free_server()\n"); | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Create a version 2 or 3 volume record | |
1113 | * - keyed on server and FSID | |
1114 | */ | |
2283f8d6 | 1115 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1116 | struct nfs_fh *mntfh) |
1117 | { | |
1118 | struct nfs_server *server; | |
fbca779a | 1119 | struct nfs_fattr *fattr; |
54ceac45 DH |
1120 | int error; |
1121 | ||
1122 | server = nfs_alloc_server(); | |
1123 | if (!server) | |
1124 | return ERR_PTR(-ENOMEM); | |
1125 | ||
fbca779a TM |
1126 | error = -ENOMEM; |
1127 | fattr = nfs_alloc_fattr(); | |
1128 | if (fattr == NULL) | |
1129 | goto error; | |
1130 | ||
54ceac45 DH |
1131 | /* Get a client representation */ |
1132 | error = nfs_init_server(server, data); | |
1133 | if (error < 0) | |
1134 | goto error; | |
1135 | ||
1136 | BUG_ON(!server->nfs_client); | |
1137 | BUG_ON(!server->nfs_client->rpc_ops); | |
1138 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1139 | ||
1140 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1141 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1142 | if (error < 0) |
1143 | goto error; | |
54af3bb5 TM |
1144 | if (server->nfs_client->rpc_ops->version == 3) { |
1145 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1146 | server->namelen = NFS3_MAXNAMLEN; | |
1147 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1148 | server->caps |= NFS_CAP_READDIRPLUS; | |
1149 | } else { | |
1150 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1151 | server->namelen = NFS2_MAXNAMLEN; | |
1152 | } | |
1153 | ||
fbca779a TM |
1154 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1155 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1156 | if (error < 0) { |
1157 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1158 | goto error; | |
1159 | } | |
1160 | } | |
fbca779a | 1161 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1162 | |
6daabf1b DH |
1163 | dprintk("Server FSID: %llx:%llx\n", |
1164 | (unsigned long long) server->fsid.major, | |
1165 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1166 | |
fca5238e | 1167 | nfs_server_insert_lists(server); |
54ceac45 | 1168 | server->mount_time = jiffies; |
fbca779a | 1169 | nfs_free_fattr(fattr); |
54ceac45 DH |
1170 | return server; |
1171 | ||
1172 | error: | |
fbca779a | 1173 | nfs_free_fattr(fattr); |
54ceac45 DH |
1174 | nfs_free_server(server); |
1175 | return ERR_PTR(error); | |
1176 | } | |
1177 | ||
1178 | #ifdef CONFIG_NFS_V4 | |
c36fca52 AA |
1179 | /* |
1180 | * NFSv4.0 callback thread helper | |
1181 | * | |
1182 | * Find a client by IP address, protocol version, and minorversion | |
1183 | * | |
1184 | * Called from the pg_authenticate method. The callback identifier | |
1185 | * is not used as it has not been decoded. | |
1186 | * | |
1187 | * Returns NULL if no such client | |
1188 | */ | |
1189 | struct nfs_client * | |
1190 | nfs4_find_client_no_ident(const struct sockaddr *addr) | |
1191 | { | |
1192 | struct nfs_client *clp; | |
1193 | ||
1194 | spin_lock(&nfs_client_lock); | |
1195 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1196 | if (nfs4_cb_match_client(addr, clp, 0) == false) | |
1197 | continue; | |
1198 | atomic_inc(&clp->cl_count); | |
1199 | spin_unlock(&nfs_client_lock); | |
1200 | return clp; | |
1201 | } | |
1202 | spin_unlock(&nfs_client_lock); | |
1203 | return NULL; | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * NFSv4.0 callback thread helper | |
1208 | * | |
1209 | * Find a client by callback identifier | |
1210 | */ | |
1211 | struct nfs_client * | |
1212 | nfs4_find_client_ident(int cb_ident) | |
1213 | { | |
1214 | struct nfs_client *clp; | |
1215 | ||
1216 | spin_lock(&nfs_client_lock); | |
1217 | clp = idr_find(&cb_ident_idr, cb_ident); | |
1218 | if (clp) | |
1219 | atomic_inc(&clp->cl_count); | |
1220 | spin_unlock(&nfs_client_lock); | |
1221 | return clp; | |
1222 | } | |
1223 | ||
1224 | #if defined(CONFIG_NFS_V4_1) | |
1225 | /* | |
1226 | * NFSv4.1 callback thread helper | |
1227 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1228 | * minorversion, and sessionID | |
1229 | * | |
c36fca52 AA |
1230 | * Returns NULL if no such client |
1231 | */ | |
1232 | struct nfs_client * | |
1233 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1234 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1235 | { |
1236 | struct nfs_client *clp; | |
1237 | ||
1238 | spin_lock(&nfs_client_lock); | |
1239 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1240 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
1241 | continue; | |
1242 | ||
1243 | if (!nfs4_has_session(clp)) | |
1244 | continue; | |
1245 | ||
778be232 AA |
1246 | /* Match sessionid*/ |
1247 | if (memcmp(clp->cl_session->sess_id.data, | |
1248 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
c36fca52 AA |
1249 | continue; |
1250 | ||
1251 | atomic_inc(&clp->cl_count); | |
1252 | spin_unlock(&nfs_client_lock); | |
1253 | return clp; | |
1254 | } | |
1255 | spin_unlock(&nfs_client_lock); | |
1256 | return NULL; | |
1257 | } | |
1258 | ||
1259 | #else /* CONFIG_NFS_V4_1 */ | |
1260 | ||
1261 | struct nfs_client * | |
1262 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
778be232 | 1263 | struct nfs4_sessionid *sid) |
c36fca52 AA |
1264 | { |
1265 | return NULL; | |
1266 | } | |
1267 | #endif /* CONFIG_NFS_V4_1 */ | |
1268 | ||
9bdaa86d BH |
1269 | /* |
1270 | * Initialize the NFS4 callback service | |
1271 | */ | |
1272 | static int nfs4_init_callback(struct nfs_client *clp) | |
1273 | { | |
1274 | int error; | |
1275 | ||
1276 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1277 | if (nfs4_has_session(clp)) { |
1278 | error = xprt_setup_backchannel( | |
1279 | clp->cl_rpcclient->cl_xprt, | |
1280 | NFS41_BC_MIN_CALLBACKS); | |
1281 | if (error < 0) | |
1282 | return error; | |
1283 | } | |
1284 | ||
97dc1359 | 1285 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1286 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1287 | if (error < 0) { |
1288 | dprintk("%s: failed to start callback. Error = %d\n", | |
1289 | __func__, error); | |
1290 | return error; | |
1291 | } | |
1292 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1293 | } | |
1294 | return 0; | |
1295 | } | |
1296 | ||
557134a3 AA |
1297 | /* |
1298 | * Initialize the minor version specific parts of an NFS4 client record | |
1299 | */ | |
1300 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1301 | { | |
1302 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1303 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1304 | struct nfs4_session *session = NULL; |
1305 | /* | |
1306 | * Create the session and mark it expired. | |
1307 | * When a SEQUENCE operation encounters the expired session | |
1308 | * it will do session recovery to initialize it. | |
1309 | */ | |
1310 | session = nfs4_alloc_session(clp); | |
1311 | if (!session) | |
1312 | return -ENOMEM; | |
1313 | ||
1314 | clp->cl_session = session; | |
fe74ba3a TM |
1315 | /* |
1316 | * The create session reply races with the server back | |
1317 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1318 | * so that the client back channel can find the | |
1319 | * nfs_client struct | |
1320 | */ | |
1321 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1322 | } |
1323 | #endif /* CONFIG_NFS_V4_1 */ | |
1324 | ||
71468513 | 1325 | return nfs4_init_callback(clp); |
557134a3 AA |
1326 | } |
1327 | ||
54ceac45 DH |
1328 | /* |
1329 | * Initialise an NFS4 client record | |
1330 | */ | |
45a52a02 AA |
1331 | int nfs4_init_client(struct nfs_client *clp, |
1332 | const struct rpc_timeout *timeparms, | |
1333 | const char *ip_addr, | |
1334 | rpc_authflavor_t authflavour, | |
1335 | int noresvport) | |
54ceac45 DH |
1336 | { |
1337 | int error; | |
1338 | ||
1339 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1340 | /* the client is initialised already */ | |
1341 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1346 | clp->rpc_ops = &nfs_v4_clientops; | |
1347 | ||
59dca3b2 | 1348 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
45a52a02 | 1349 | 1, noresvport); |
54ceac45 DH |
1350 | if (error < 0) |
1351 | goto error; | |
f4373bf9 | 1352 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1353 | |
1354 | error = nfs_idmap_new(clp); | |
1355 | if (error < 0) { | |
1356 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1357 | __func__, error); |
54ceac45 DH |
1358 | goto error; |
1359 | } | |
9c5bf38d | 1360 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1361 | |
557134a3 AA |
1362 | error = nfs4_init_client_minor_version(clp); |
1363 | if (error < 0) | |
1364 | goto error; | |
1365 | ||
76db6d95 AA |
1366 | if (!nfs4_has_session(clp)) |
1367 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1368 | return 0; |
1369 | ||
1370 | error: | |
1371 | nfs_mark_client_ready(clp, error); | |
1372 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1373 | return error; | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Set up an NFS4 client | |
1378 | */ | |
1379 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1380 | const char *hostname, |
1381 | const struct sockaddr *addr, | |
1382 | const size_t addrlen, | |
7d9ac06f | 1383 | const char *ip_addr, |
54ceac45 | 1384 | rpc_authflavor_t authflavour, |
94a417f3 BH |
1385 | int proto, const struct rpc_timeout *timeparms, |
1386 | u32 minorversion) | |
54ceac45 | 1387 | { |
3a498026 TM |
1388 | struct nfs_client_initdata cl_init = { |
1389 | .hostname = hostname, | |
dcecae0f CL |
1390 | .addr = addr, |
1391 | .addrlen = addrlen, | |
40c55319 | 1392 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1393 | .proto = proto, |
5aae4a9a | 1394 | .minorversion = minorversion, |
3a498026 | 1395 | }; |
54ceac45 DH |
1396 | struct nfs_client *clp; |
1397 | int error; | |
1398 | ||
1399 | dprintk("--> nfs4_set_client()\n"); | |
1400 | ||
1401 | /* Allocate or find a client reference we can use */ | |
45a52a02 AA |
1402 | clp = nfs_get_client(&cl_init, timeparms, ip_addr, authflavour, |
1403 | server->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
1404 | if (IS_ERR(clp)) { |
1405 | error = PTR_ERR(clp); | |
1406 | goto error; | |
1407 | } | |
54ceac45 | 1408 | |
d6fb79d4 AA |
1409 | /* |
1410 | * Query for the lease time on clientid setup or renewal | |
1411 | * | |
1412 | * Note that this will be set on nfs_clients that were created | |
1413 | * only for the DS role and did not set this bit, but now will | |
1414 | * serve a dual role. | |
1415 | */ | |
1416 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
1417 | ||
54ceac45 DH |
1418 | server->nfs_client = clp; |
1419 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1420 | return 0; | |
54ceac45 DH |
1421 | error: |
1422 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1423 | return error; | |
1424 | } | |
1425 | ||
d83217c1 AA |
1426 | /* |
1427 | * Set up a pNFS Data Server client. | |
1428 | * | |
1429 | * Return any existing nfs_client that matches server address,port,version | |
1430 | * and minorversion. | |
1431 | * | |
1432 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
1433 | * low timeout interval so that if a connection is lost, we retry through | |
1434 | * the MDS. | |
1435 | */ | |
1436 | struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp, | |
1437 | const struct sockaddr *ds_addr, | |
1438 | int ds_addrlen, int ds_proto) | |
1439 | { | |
1440 | struct nfs_client_initdata cl_init = { | |
1441 | .addr = ds_addr, | |
1442 | .addrlen = ds_addrlen, | |
1443 | .rpc_ops = &nfs_v4_clientops, | |
1444 | .proto = ds_proto, | |
1445 | .minorversion = mds_clp->cl_minorversion, | |
1446 | }; | |
1447 | struct rpc_timeout ds_timeout = { | |
1448 | .to_initval = 15 * HZ, | |
1449 | .to_maxval = 15 * HZ, | |
1450 | .to_retries = 1, | |
1451 | .to_exponential = 1, | |
1452 | }; | |
1453 | struct nfs_client *clp; | |
1454 | ||
1455 | /* | |
1456 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
1457 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
1458 | * (section 13.1 RFC 5661). | |
1459 | */ | |
1460 | clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr, | |
1461 | mds_clp->cl_rpcclient->cl_auth->au_flavor, 0); | |
1462 | ||
1463 | dprintk("<-- %s %p\n", __func__, clp); | |
1464 | return clp; | |
1465 | } | |
94b134ac | 1466 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); |
557134a3 | 1467 | |
96b09e02 AA |
1468 | /* |
1469 | * Session has been established, and the client marked ready. | |
1470 | * Set the mount rsize and wsize with negotiated fore channel | |
1471 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1472 | */ | |
1473 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1474 | { | |
1475 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1476 | struct nfs4_session *sess; |
1477 | u32 server_resp_sz; | |
1478 | u32 server_rqst_sz; | |
1479 | ||
96b09e02 AA |
1480 | if (!nfs4_has_session(server->nfs_client)) |
1481 | return; | |
2449ea2e AB |
1482 | sess = server->nfs_client->cl_session; |
1483 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1484 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1485 | ||
1486 | if (server->rsize > server_resp_sz) | |
1487 | server->rsize = server_resp_sz; | |
1488 | if (server->wsize > server_rqst_sz) | |
1489 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1490 | #endif /* CONFIG_NFS_V4_1 */ |
1491 | } | |
1492 | ||
44950b67 TM |
1493 | static int nfs4_server_common_setup(struct nfs_server *server, |
1494 | struct nfs_fh *mntfh) | |
1495 | { | |
1496 | struct nfs_fattr *fattr; | |
1497 | int error; | |
1498 | ||
1499 | BUG_ON(!server->nfs_client); | |
1500 | BUG_ON(!server->nfs_client->rpc_ops); | |
1501 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1502 | ||
94de8b27 AA |
1503 | /* data servers support only a subset of NFSv4.1 */ |
1504 | if (is_ds_only_client(server->nfs_client)) | |
1505 | return -EPROTONOSUPPORT; | |
1506 | ||
44950b67 TM |
1507 | fattr = nfs_alloc_fattr(); |
1508 | if (fattr == NULL) | |
1509 | return -ENOMEM; | |
1510 | ||
1511 | /* We must ensure the session is initialised first */ | |
1512 | error = nfs4_init_session(server); | |
1513 | if (error < 0) | |
1514 | goto out; | |
1515 | ||
1516 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1517 | error = nfs4_get_rootfh(server, mntfh); | |
1518 | if (error < 0) | |
1519 | goto out; | |
1520 | ||
1521 | dprintk("Server FSID: %llx:%llx\n", | |
1522 | (unsigned long long) server->fsid.major, | |
1523 | (unsigned long long) server->fsid.minor); | |
1524 | dprintk("Mount FH: %d\n", mntfh->size); | |
1525 | ||
1526 | nfs4_session_set_rwsize(server); | |
1527 | ||
1528 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1529 | if (error < 0) | |
1530 | goto out; | |
1531 | ||
1532 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1533 | server->namelen = NFS4_MAXNAMLEN; | |
1534 | ||
fca5238e | 1535 | nfs_server_insert_lists(server); |
44950b67 TM |
1536 | server->mount_time = jiffies; |
1537 | out: | |
1538 | nfs_free_fattr(fattr); | |
1539 | return error; | |
1540 | } | |
1541 | ||
54ceac45 DH |
1542 | /* |
1543 | * Create a version 4 volume record | |
1544 | */ | |
1545 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1546 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1547 | { |
33170233 | 1548 | struct rpc_timeout timeparms; |
54ceac45 DH |
1549 | int error; |
1550 | ||
1551 | dprintk("--> nfs4_init_server()\n"); | |
1552 | ||
33170233 TM |
1553 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1554 | data->timeo, data->retrans); | |
1555 | ||
542fcc33 CL |
1556 | /* Initialise the client representation from the mount data */ |
1557 | server->flags = data->flags; | |
82f2e547 BS |
1558 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1559 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1560 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1561 | server->options = data->options; |
542fcc33 | 1562 | |
33170233 TM |
1563 | /* Get a client record */ |
1564 | error = nfs4_set_client(server, | |
1565 | data->nfs_server.hostname, | |
1566 | (const struct sockaddr *)&data->nfs_server.address, | |
1567 | data->nfs_server.addrlen, | |
1568 | data->client_address, | |
1569 | data->auth_flavors[0], | |
1570 | data->nfs_server.protocol, | |
94a417f3 BH |
1571 | &timeparms, |
1572 | data->minorversion); | |
33170233 TM |
1573 | if (error < 0) |
1574 | goto error; | |
1575 | ||
b064eca2 TM |
1576 | /* |
1577 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1578 | * authentication. | |
1579 | */ | |
1580 | if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX) | |
1581 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1582 | ||
54ceac45 DH |
1583 | if (data->rsize) |
1584 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1585 | if (data->wsize) | |
1586 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1587 | ||
1588 | server->acregmin = data->acregmin * HZ; | |
1589 | server->acregmax = data->acregmax * HZ; | |
1590 | server->acdirmin = data->acdirmin * HZ; | |
1591 | server->acdirmax = data->acdirmax * HZ; | |
1592 | ||
f22d6d79 CL |
1593 | server->port = data->nfs_server.port; |
1594 | ||
33170233 | 1595 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1596 | |
33170233 | 1597 | error: |
54ceac45 DH |
1598 | /* Done */ |
1599 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1600 | return error; | |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * Create a version 4 volume record | |
1605 | * - keyed on server and FSID | |
1606 | */ | |
91ea40b9 | 1607 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1608 | struct nfs_fh *mntfh) |
1609 | { | |
54ceac45 DH |
1610 | struct nfs_server *server; |
1611 | int error; | |
1612 | ||
1613 | dprintk("--> nfs4_create_server()\n"); | |
1614 | ||
1615 | server = nfs_alloc_server(); | |
1616 | if (!server) | |
1617 | return ERR_PTR(-ENOMEM); | |
1618 | ||
54ceac45 | 1619 | /* set up the general RPC client */ |
91ea40b9 | 1620 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1621 | if (error < 0) |
1622 | goto error; | |
1623 | ||
44950b67 | 1624 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1625 | if (error < 0) |
1626 | goto error; | |
1627 | ||
54ceac45 DH |
1628 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1629 | return server; | |
1630 | ||
1631 | error: | |
1632 | nfs_free_server(server); | |
1633 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1634 | return ERR_PTR(error); | |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * Create an NFS4 referral server record | |
1639 | */ | |
1640 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1641 | struct nfs_fh *mntfh) |
54ceac45 DH |
1642 | { |
1643 | struct nfs_client *parent_client; | |
1644 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1645 | int error; |
1646 | ||
1647 | dprintk("--> nfs4_create_referral_server()\n"); | |
1648 | ||
1649 | server = nfs_alloc_server(); | |
1650 | if (!server) | |
1651 | return ERR_PTR(-ENOMEM); | |
1652 | ||
1653 | parent_server = NFS_SB(data->sb); | |
1654 | parent_client = parent_server->nfs_client; | |
1655 | ||
542fcc33 CL |
1656 | /* Initialise the client representation from the parent server */ |
1657 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1658 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1659 | |
54ceac45 DH |
1660 | /* Get a client representation. |
1661 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1662 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1663 | data->addr, |
1664 | data->addrlen, | |
dcecae0f CL |
1665 | parent_client->cl_ipaddr, |
1666 | data->authflavor, | |
1667 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1668 | parent_server->client->cl_timeout, |
97dc1359 | 1669 | parent_client->cl_mvops->minor_version); |
297de4f6 AA |
1670 | if (error < 0) |
1671 | goto error; | |
54ceac45 | 1672 | |
33170233 | 1673 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1674 | if (error < 0) |
1675 | goto error; | |
1676 | ||
44950b67 | 1677 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1678 | if (error < 0) |
1679 | goto error; | |
1680 | ||
54ceac45 DH |
1681 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1682 | return server; | |
1683 | ||
1684 | error: | |
1685 | nfs_free_server(server); | |
1686 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1687 | return ERR_PTR(error); | |
1688 | } | |
1689 | ||
1690 | #endif /* CONFIG_NFS_V4 */ | |
1691 | ||
1692 | /* | |
1693 | * Clone an NFS2, NFS3 or NFS4 server record | |
1694 | */ | |
1695 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1696 | struct nfs_fh *fh, | |
1697 | struct nfs_fattr *fattr) | |
1698 | { | |
1699 | struct nfs_server *server; | |
fbca779a | 1700 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1701 | int error; |
1702 | ||
1703 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1704 | (unsigned long long) fattr->fsid.major, |
1705 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1706 | |
1707 | server = nfs_alloc_server(); | |
1708 | if (!server) | |
1709 | return ERR_PTR(-ENOMEM); | |
1710 | ||
fbca779a TM |
1711 | error = -ENOMEM; |
1712 | fattr_fsinfo = nfs_alloc_fattr(); | |
1713 | if (fattr_fsinfo == NULL) | |
1714 | goto out_free_server; | |
1715 | ||
54ceac45 DH |
1716 | /* Copy data from the source */ |
1717 | server->nfs_client = source->nfs_client; | |
1718 | atomic_inc(&server->nfs_client->cl_count); | |
1719 | nfs_server_copy_userdata(server, source); | |
1720 | ||
1721 | server->fsid = fattr->fsid; | |
1722 | ||
33170233 TM |
1723 | error = nfs_init_server_rpcclient(server, |
1724 | source->client->cl_timeout, | |
1725 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1726 | if (error < 0) |
1727 | goto out_free_server; | |
1728 | if (!IS_ERR(source->client_acl)) | |
1729 | nfs_init_server_aclclient(server); | |
1730 | ||
1731 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1732 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1733 | if (error < 0) |
1734 | goto out_free_server; | |
1735 | ||
54af3bb5 TM |
1736 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1737 | server->namelen = NFS4_MAXNAMLEN; | |
1738 | ||
54ceac45 | 1739 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1740 | (unsigned long long) server->fsid.major, |
1741 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1742 | |
1743 | error = nfs_start_lockd(server); | |
1744 | if (error < 0) | |
1745 | goto out_free_server; | |
1746 | ||
fca5238e | 1747 | nfs_server_insert_lists(server); |
54ceac45 DH |
1748 | server->mount_time = jiffies; |
1749 | ||
fbca779a | 1750 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1751 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1752 | return server; | |
1753 | ||
1754 | out_free_server: | |
fbca779a | 1755 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1756 | nfs_free_server(server); |
1757 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1758 | return ERR_PTR(error); | |
1759 | } | |
6aaca566 DH |
1760 | |
1761 | #ifdef CONFIG_PROC_FS | |
1762 | static struct proc_dir_entry *proc_fs_nfs; | |
1763 | ||
1764 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1765 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1766 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1767 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1768 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1769 | ||
88e9d34c | 1770 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1771 | .start = nfs_server_list_start, |
1772 | .next = nfs_server_list_next, | |
1773 | .stop = nfs_server_list_stop, | |
1774 | .show = nfs_server_list_show, | |
1775 | }; | |
1776 | ||
00977a59 | 1777 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1778 | .open = nfs_server_list_open, |
1779 | .read = seq_read, | |
1780 | .llseek = seq_lseek, | |
1781 | .release = seq_release, | |
34b37235 | 1782 | .owner = THIS_MODULE, |
6aaca566 DH |
1783 | }; |
1784 | ||
1785 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1786 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1787 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1788 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1789 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1790 | ||
88e9d34c | 1791 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1792 | .start = nfs_volume_list_start, |
1793 | .next = nfs_volume_list_next, | |
1794 | .stop = nfs_volume_list_stop, | |
1795 | .show = nfs_volume_list_show, | |
1796 | }; | |
1797 | ||
00977a59 | 1798 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1799 | .open = nfs_volume_list_open, |
1800 | .read = seq_read, | |
1801 | .llseek = seq_lseek, | |
1802 | .release = seq_release, | |
34b37235 | 1803 | .owner = THIS_MODULE, |
6aaca566 DH |
1804 | }; |
1805 | ||
1806 | /* | |
1807 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1808 | * we're dealing | |
1809 | */ | |
1810 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1811 | { | |
1812 | struct seq_file *m; | |
1813 | int ret; | |
1814 | ||
1815 | ret = seq_open(file, &nfs_server_list_ops); | |
1816 | if (ret < 0) | |
1817 | return ret; | |
1818 | ||
1819 | m = file->private_data; | |
1820 | m->private = PDE(inode)->data; | |
1821 | ||
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | /* | |
1826 | * set up the iterator to start reading from the server list and return the first item | |
1827 | */ | |
1828 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1829 | { | |
6aaca566 DH |
1830 | /* lock the list against modification */ |
1831 | spin_lock(&nfs_client_lock); | |
259902ea | 1832 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1833 | } |
1834 | ||
1835 | /* | |
1836 | * move to next server | |
1837 | */ | |
1838 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1839 | { | |
259902ea | 1840 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1841 | } |
1842 | ||
1843 | /* | |
1844 | * clean up after reading from the transports list | |
1845 | */ | |
1846 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1847 | { | |
1848 | spin_unlock(&nfs_client_lock); | |
1849 | } | |
1850 | ||
1851 | /* | |
1852 | * display a header line followed by a load of call lines | |
1853 | */ | |
1854 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1855 | { | |
1856 | struct nfs_client *clp; | |
1857 | ||
1858 | /* display header on line 1 */ | |
259902ea | 1859 | if (v == &nfs_client_list) { |
6aaca566 DH |
1860 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | /* display one transport per line on subsequent lines */ | |
1865 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1866 | ||
5d8515ca | 1867 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1868 | clp->rpc_ops->version, |
5d8515ca CL |
1869 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1870 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1871 | atomic_read(&clp->cl_count), |
1872 | clp->cl_hostname); | |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | /* | |
1878 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1879 | */ | |
1880 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1881 | { | |
1882 | struct seq_file *m; | |
1883 | int ret; | |
1884 | ||
1885 | ret = seq_open(file, &nfs_volume_list_ops); | |
1886 | if (ret < 0) | |
1887 | return ret; | |
1888 | ||
1889 | m = file->private_data; | |
1890 | m->private = PDE(inode)->data; | |
1891 | ||
1892 | return 0; | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * set up the iterator to start reading from the volume list and return the first item | |
1897 | */ | |
1898 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1899 | { | |
6aaca566 DH |
1900 | /* lock the list against modification */ |
1901 | spin_lock(&nfs_client_lock); | |
259902ea | 1902 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1903 | } |
1904 | ||
1905 | /* | |
1906 | * move to next volume | |
1907 | */ | |
1908 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1909 | { | |
259902ea | 1910 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1911 | } |
1912 | ||
1913 | /* | |
1914 | * clean up after reading from the transports list | |
1915 | */ | |
1916 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1917 | { | |
1918 | spin_unlock(&nfs_client_lock); | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * display a header line followed by a load of call lines | |
1923 | */ | |
1924 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1925 | { | |
1926 | struct nfs_server *server; | |
1927 | struct nfs_client *clp; | |
1928 | char dev[8], fsid[17]; | |
1929 | ||
1930 | /* display header on line 1 */ | |
259902ea | 1931 | if (v == &nfs_volume_list) { |
5d1acff1 | 1932 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1933 | return 0; |
1934 | } | |
1935 | /* display one transport per line on subsequent lines */ | |
1936 | server = list_entry(v, struct nfs_server, master_link); | |
1937 | clp = server->nfs_client; | |
1938 | ||
1939 | snprintf(dev, 8, "%u:%u", | |
1940 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1941 | ||
1942 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1943 | (unsigned long long) server->fsid.major, |
1944 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1945 | |
5d1acff1 | 1946 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1947 | clp->rpc_ops->version, |
5d8515ca CL |
1948 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1949 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1950 | dev, |
5d1acff1 DH |
1951 | fsid, |
1952 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1953 | |
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | /* | |
1958 | * initialise the /proc/fs/nfsfs/ directory | |
1959 | */ | |
1960 | int __init nfs_fs_proc_init(void) | |
1961 | { | |
1962 | struct proc_dir_entry *p; | |
1963 | ||
36a5aeb8 | 1964 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1965 | if (!proc_fs_nfs) |
1966 | goto error_0; | |
1967 | ||
6aaca566 | 1968 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1969 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1970 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1971 | if (!p) |
1972 | goto error_1; | |
1973 | ||
6aaca566 | 1974 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1975 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1976 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1977 | if (!p) |
1978 | goto error_2; | |
6aaca566 DH |
1979 | return 0; |
1980 | ||
1981 | error_2: | |
1982 | remove_proc_entry("servers", proc_fs_nfs); | |
1983 | error_1: | |
36a5aeb8 | 1984 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1985 | error_0: |
1986 | return -ENOMEM; | |
1987 | } | |
1988 | ||
1989 | /* | |
1990 | * clean up the /proc/fs/nfsfs/ directory | |
1991 | */ | |
1992 | void nfs_fs_proc_exit(void) | |
1993 | { | |
1994 | remove_proc_entry("volumes", proc_fs_nfs); | |
1995 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1996 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1997 | } |
1998 | ||
1999 | #endif /* CONFIG_PROC_FS */ | |
b064eca2 TM |
2000 | |
2001 | module_param(nfs4_disable_idmapping, bool, 0644); | |
2002 | MODULE_PARM_DESC(nfs4_disable_idmapping, | |
2003 | "Turn off NFSv4 idmapping when using 'sec=sys'"); |