]>
Commit | Line | Data |
---|---|---|
24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 | 37 | #include <linux/in6.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
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 DH |
58 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
59 | ||
5006a76c DH |
60 | /* |
61 | * RPC cruft for NFS | |
62 | */ | |
63 | static struct rpc_version *nfs_version[5] = { | |
64 | [2] = &nfs_version2, | |
65 | #ifdef CONFIG_NFS_V3 | |
66 | [3] = &nfs_version3, | |
67 | #endif | |
68 | #ifdef CONFIG_NFS_V4 | |
69 | [4] = &nfs_version4, | |
70 | #endif | |
71 | }; | |
72 | ||
73 | struct rpc_program nfs_program = { | |
74 | .name = "nfs", | |
75 | .number = NFS_PROGRAM, | |
76 | .nrvers = ARRAY_SIZE(nfs_version), | |
77 | .version = nfs_version, | |
78 | .stats = &nfs_rpcstat, | |
79 | .pipe_dir_name = "/nfs", | |
80 | }; | |
81 | ||
82 | struct rpc_stat nfs_rpcstat = { | |
83 | .program = &nfs_program | |
84 | }; | |
85 | ||
86 | ||
87 | #ifdef CONFIG_NFS_V3_ACL | |
88 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
89 | static struct rpc_version * nfsacl_version[] = { | |
90 | [3] = &nfsacl_version3, | |
91 | }; | |
92 | ||
93 | struct rpc_program nfsacl_program = { | |
94 | .name = "nfsacl", | |
95 | .number = NFS_ACL_PROGRAM, | |
96 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
97 | .version = nfsacl_version, | |
98 | .stats = &nfsacl_rpcstat, | |
99 | }; | |
100 | #endif /* CONFIG_NFS_V3_ACL */ | |
101 | ||
3a498026 TM |
102 | struct nfs_client_initdata { |
103 | const char *hostname; | |
d7422c47 | 104 | const struct sockaddr *addr; |
6e4cffd7 | 105 | size_t addrlen; |
40c55319 | 106 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 107 | int proto; |
5aae4a9a | 108 | u32 minorversion; |
3a498026 TM |
109 | }; |
110 | ||
24c8dbbb DH |
111 | /* |
112 | * Allocate a shared client record | |
113 | * | |
114 | * Since these are allocated/deallocated very rarely, we don't | |
115 | * bother putting them in a slab cache... | |
116 | */ | |
3a498026 | 117 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
118 | { |
119 | struct nfs_client *clp; | |
7c67db3a | 120 | struct rpc_cred *cred; |
a21bdd9b | 121 | int err = -ENOMEM; |
24c8dbbb DH |
122 | |
123 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
124 | goto error_0; | |
125 | ||
40c55319 TM |
126 | clp->rpc_ops = cl_init->rpc_ops; |
127 | ||
24c8dbbb DH |
128 | atomic_set(&clp->cl_count, 1); |
129 | clp->cl_cons_state = NFS_CS_INITING; | |
130 | ||
6e4cffd7 CL |
131 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
132 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 133 | |
3a498026 | 134 | if (cl_init->hostname) { |
a21bdd9b | 135 | err = -ENOMEM; |
3a498026 | 136 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 137 | if (!clp->cl_hostname) |
71468513 | 138 | goto error_cleanup; |
24c8dbbb DH |
139 | } |
140 | ||
141 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
142 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
143 | ||
59dca3b2 TM |
144 | clp->cl_proto = cl_init->proto; |
145 | ||
24c8dbbb | 146 | #ifdef CONFIG_NFS_V4 |
24c8dbbb | 147 | INIT_LIST_HEAD(&clp->cl_delegations); |
24c8dbbb | 148 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 149 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
150 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
151 | clp->cl_boot_time = CURRENT_TIME; | |
152 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
5aae4a9a | 153 | clp->cl_minorversion = cl_init->minorversion; |
97dc1359 | 154 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
24c8dbbb | 155 | #endif |
7c67db3a TM |
156 | cred = rpc_lookup_machine_cred(); |
157 | if (!IS_ERR(cred)) | |
158 | clp->cl_machine_cred = cred; | |
974cec8c AA |
159 | #if defined(CONFIG_NFS_V4_1) |
160 | INIT_LIST_HEAD(&clp->cl_layouts); | |
161 | #endif | |
14727281 DH |
162 | nfs_fscache_get_client_cookie(clp); |
163 | ||
24c8dbbb DH |
164 | return clp; |
165 | ||
71468513 | 166 | error_cleanup: |
24c8dbbb DH |
167 | kfree(clp); |
168 | error_0: | |
a21bdd9b | 169 | return ERR_PTR(err); |
24c8dbbb DH |
170 | } |
171 | ||
5dd3177a | 172 | #ifdef CONFIG_NFS_V4 |
557134a3 AA |
173 | /* |
174 | * Clears/puts all minor version specific parts from an nfs_client struct | |
175 | * reverting it to minorversion 0. | |
176 | */ | |
177 | static void nfs4_clear_client_minor_version(struct nfs_client *clp) | |
178 | { | |
179 | #ifdef CONFIG_NFS_V4_1 | |
180 | if (nfs4_has_session(clp)) { | |
181 | nfs4_destroy_session(clp->cl_session); | |
182 | clp->cl_session = NULL; | |
183 | } | |
cccef3b9 | 184 | |
97dc1359 | 185 | clp->cl_mvops = nfs_v4_minor_ops[0]; |
557134a3 | 186 | #endif /* CONFIG_NFS_V4_1 */ |
888ef2e3 | 187 | } |
71468513 | 188 | |
888ef2e3 AB |
189 | /* |
190 | * Destroy the NFS4 callback service | |
191 | */ | |
192 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
193 | { | |
194 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 195 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
196 | } |
197 | ||
198 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
199 | { | |
200 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
201 | nfs4_kill_renewd(clp); | |
202 | nfs4_clear_client_minor_version(clp); | |
71468513 | 203 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
204 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
205 | nfs_idmap_delete(clp); | |
206 | ||
207 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
557134a3 | 208 | } |
888ef2e3 AB |
209 | #else |
210 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
211 | { | |
212 | } | |
213 | #endif /* CONFIG_NFS_V4 */ | |
557134a3 | 214 | |
24c8dbbb DH |
215 | /* |
216 | * Destroy a shared client record | |
217 | */ | |
218 | static void nfs_free_client(struct nfs_client *clp) | |
219 | { | |
40c55319 | 220 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 221 | |
5dd3177a | 222 | nfs4_shutdown_client(clp); |
24c8dbbb | 223 | |
14727281 DH |
224 | nfs_fscache_release_client_cookie(clp); |
225 | ||
24c8dbbb DH |
226 | /* -EIO all pending I/O */ |
227 | if (!IS_ERR(clp->cl_rpcclient)) | |
228 | rpc_shutdown_client(clp->cl_rpcclient); | |
229 | ||
7c67db3a TM |
230 | if (clp->cl_machine_cred != NULL) |
231 | put_rpccred(clp->cl_machine_cred); | |
232 | ||
24c8dbbb DH |
233 | kfree(clp->cl_hostname); |
234 | kfree(clp); | |
235 | ||
236 | dprintk("<-- nfs_free_client()\n"); | |
237 | } | |
238 | ||
239 | /* | |
240 | * Release a reference to a shared client record | |
241 | */ | |
242 | void nfs_put_client(struct nfs_client *clp) | |
243 | { | |
27ba8512 DH |
244 | if (!clp) |
245 | return; | |
246 | ||
24c8dbbb DH |
247 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
248 | ||
249 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
250 | list_del(&clp->cl_share_link); | |
251 | spin_unlock(&nfs_client_lock); | |
252 | ||
253 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
254 | ||
255 | nfs_free_client(clp); | |
256 | } | |
257 | } | |
16b374ca | 258 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 259 | |
9082a5cc | 260 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
261 | /* |
262 | * Test if two ip6 socket addresses refer to the same socket by | |
263 | * comparing relevant fields. The padding bytes specifically, are not | |
264 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
265 | * and sin6_scope_id is only compared if the address is "link local" | |
266 | * because "link local" addresses need only be unique to a specific | |
267 | * link. Conversely, ordinary unicast addresses might have different | |
268 | * sin6_scope_id. | |
269 | * | |
270 | * The caller should ensure both socket addresses are AF_INET6. | |
271 | */ | |
3c8c45df CL |
272 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
273 | const struct sockaddr *sa2) | |
9f4c899c | 274 | { |
3c8c45df CL |
275 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
276 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 277 | |
3c8c45df CL |
278 | if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && |
279 | sin1->sin6_scope_id != sin2->sin6_scope_id) | |
9f4c899c | 280 | return 0; |
3b0d3f93 | 281 | |
3c8c45df | 282 | return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr); |
3b0d3f93 | 283 | } |
3c8c45df CL |
284 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
285 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
286 | const struct sockaddr *sa2) | |
9f4c899c TM |
287 | { |
288 | return 0; | |
289 | } | |
9082a5cc | 290 | #endif |
3b0d3f93 | 291 | |
d7371c41 ID |
292 | /* |
293 | * Test if two ip4 socket addresses refer to the same socket, by | |
294 | * comparing relevant fields. The padding bytes specifically, are | |
295 | * not compared. | |
296 | * | |
297 | * The caller should ensure both socket addresses are AF_INET. | |
298 | */ | |
3c8c45df CL |
299 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
300 | const struct sockaddr *sa2) | |
301 | { | |
302 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
303 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
304 | ||
305 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
306 | } | |
307 | ||
308 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
309 | const struct sockaddr *sa2) | |
310 | { | |
311 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
312 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
313 | ||
314 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
315 | (sin1->sin6_port == sin2->sin6_port); | |
316 | } | |
317 | ||
9f4c899c TM |
318 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
319 | const struct sockaddr *sa2) | |
d7371c41 | 320 | { |
3c8c45df CL |
321 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
322 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 323 | |
3c8c45df CL |
324 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
325 | (sin1->sin_port == sin2->sin_port); | |
326 | } | |
327 | ||
328 | /* | |
329 | * Test if two socket addresses represent the same actual socket, | |
330 | * by comparing (only) relevant fields, excluding the port number. | |
331 | */ | |
332 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
333 | const struct sockaddr *sa2) | |
334 | { | |
335 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 336 | return 0; |
3c8c45df CL |
337 | |
338 | switch (sa1->sa_family) { | |
339 | case AF_INET: | |
340 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
341 | case AF_INET6: | |
342 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
343 | } | |
344 | return 0; | |
d7371c41 ID |
345 | } |
346 | ||
d7371c41 ID |
347 | /* |
348 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 349 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
350 | */ |
351 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
352 | const struct sockaddr *sa2) | |
353 | { | |
354 | if (sa1->sa_family != sa2->sa_family) | |
355 | return 0; | |
356 | ||
357 | switch (sa1->sa_family) { | |
358 | case AF_INET: | |
9f4c899c | 359 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 360 | case AF_INET6: |
9f4c899c | 361 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
362 | } |
363 | return 0; | |
364 | } | |
365 | ||
24c8dbbb | 366 | /* |
c81468a1 TM |
367 | * Find a client by IP address and protocol version |
368 | * - returns NULL if no such client | |
24c8dbbb | 369 | */ |
ff052645 | 370 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
371 | { |
372 | struct nfs_client *clp; | |
373 | ||
c81468a1 | 374 | spin_lock(&nfs_client_lock); |
24c8dbbb | 375 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
376 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
377 | ||
13bbc06a | 378 | /* Don't match clients that failed to initialise properly */ |
76db6d95 AA |
379 | if (!(clp->cl_cons_state == NFS_CS_READY || |
380 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
13bbc06a TM |
381 | continue; |
382 | ||
24c8dbbb | 383 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 384 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
385 | continue; |
386 | ||
c81468a1 | 387 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 388 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
389 | continue; |
390 | ||
c81468a1 TM |
391 | atomic_inc(&clp->cl_count); |
392 | spin_unlock(&nfs_client_lock); | |
393 | return clp; | |
24c8dbbb | 394 | } |
c81468a1 | 395 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 396 | return NULL; |
24c8dbbb DH |
397 | } |
398 | ||
3fbd67ad TM |
399 | /* |
400 | * Find a client by IP address and protocol version | |
401 | * - returns NULL if no such client | |
402 | */ | |
403 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
404 | { | |
405 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
406 | u32 nfsvers = clp->rpc_ops->version; | |
407 | ||
408 | spin_lock(&nfs_client_lock); | |
409 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
410 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
411 | ||
412 | /* Don't match clients that failed to initialise properly */ | |
413 | if (clp->cl_cons_state != NFS_CS_READY) | |
414 | continue; | |
415 | ||
416 | /* Different NFS versions cannot share the same nfs_client */ | |
417 | if (clp->rpc_ops->version != nfsvers) | |
418 | continue; | |
419 | ||
3fbd67ad TM |
420 | /* Match only the IP address, not the port number */ |
421 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
422 | continue; | |
423 | ||
424 | atomic_inc(&clp->cl_count); | |
425 | spin_unlock(&nfs_client_lock); | |
426 | return clp; | |
427 | } | |
428 | spin_unlock(&nfs_client_lock); | |
429 | return NULL; | |
430 | } | |
431 | ||
24c8dbbb | 432 | /* |
c81468a1 TM |
433 | * Find an nfs_client on the list that matches the initialisation data |
434 | * that is supplied. | |
24c8dbbb | 435 | */ |
c81468a1 | 436 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
437 | { |
438 | struct nfs_client *clp; | |
d7371c41 | 439 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 440 | |
c81468a1 | 441 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 442 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
443 | /* Don't match clients that failed to initialise properly */ |
444 | if (clp->cl_cons_state < 0) | |
445 | continue; | |
446 | ||
447 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 448 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
449 | continue; |
450 | ||
59dca3b2 TM |
451 | if (clp->cl_proto != data->proto) |
452 | continue; | |
5aae4a9a BH |
453 | /* Match nfsv4 minorversion */ |
454 | if (clp->cl_minorversion != data->minorversion) | |
455 | continue; | |
c81468a1 | 456 | /* Match the full socket address */ |
d7371c41 | 457 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
458 | continue; |
459 | ||
460 | atomic_inc(&clp->cl_count); | |
461 | return clp; | |
13bbc06a | 462 | } |
c81468a1 | 463 | return NULL; |
24c8dbbb DH |
464 | } |
465 | ||
466 | /* | |
467 | * Look up a client by IP address and protocol version | |
468 | * - creates a new record if one doesn't yet exist | |
469 | */ | |
3a498026 | 470 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
471 | { |
472 | struct nfs_client *clp, *new = NULL; | |
473 | int error; | |
474 | ||
d7422c47 CL |
475 | dprintk("--> nfs_get_client(%s,v%u)\n", |
476 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
477 | |
478 | /* see if the client already exists */ | |
479 | do { | |
480 | spin_lock(&nfs_client_lock); | |
481 | ||
c81468a1 | 482 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
483 | if (clp) |
484 | goto found_client; | |
485 | if (new) | |
486 | goto install_client; | |
487 | ||
488 | spin_unlock(&nfs_client_lock); | |
489 | ||
3a498026 | 490 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 491 | } while (!IS_ERR(new)); |
24c8dbbb | 492 | |
a21bdd9b CL |
493 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
494 | return new; | |
24c8dbbb DH |
495 | |
496 | /* install a new client and return with it unready */ | |
497 | install_client: | |
498 | clp = new; | |
499 | list_add(&clp->cl_share_link, &nfs_client_list); | |
500 | spin_unlock(&nfs_client_lock); | |
501 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
502 | return clp; | |
503 | ||
504 | /* found an existing client | |
505 | * - make sure it's ready before returning | |
506 | */ | |
507 | found_client: | |
508 | spin_unlock(&nfs_client_lock); | |
509 | ||
510 | if (new) | |
511 | nfs_free_client(new); | |
512 | ||
150030b7 | 513 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 514 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
515 | if (error < 0) { |
516 | nfs_put_client(clp); | |
517 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
518 | } |
519 | ||
520 | if (clp->cl_cons_state < NFS_CS_READY) { | |
521 | error = clp->cl_cons_state; | |
522 | nfs_put_client(clp); | |
523 | return ERR_PTR(error); | |
524 | } | |
525 | ||
54ceac45 DH |
526 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
527 | ||
24c8dbbb DH |
528 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
529 | return clp; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Mark a server as ready or failed | |
534 | */ | |
76db6d95 | 535 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
536 | { |
537 | clp->cl_cons_state = state; | |
538 | wake_up_all(&nfs_client_active_wq); | |
539 | } | |
5006a76c | 540 | |
008f55d0 BH |
541 | /* |
542 | * With sessions, the client is not marked ready until after a | |
543 | * successful EXCHANGE_ID and CREATE_SESSION. | |
544 | * | |
545 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
546 | * other versions of NFS can be tried. | |
547 | */ | |
548 | int nfs4_check_client_ready(struct nfs_client *clp) | |
549 | { | |
550 | if (!nfs4_has_session(clp)) | |
551 | return 0; | |
552 | if (clp->cl_cons_state < NFS_CS_READY) | |
553 | return -EPROTONOSUPPORT; | |
554 | return 0; | |
555 | } | |
556 | ||
5006a76c DH |
557 | /* |
558 | * Initialise the timeout values for a connection | |
559 | */ | |
560 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
561 | unsigned int timeo, unsigned int retrans) | |
562 | { | |
563 | to->to_initval = timeo * HZ / 10; | |
564 | to->to_retries = retrans; | |
5006a76c DH |
565 | |
566 | switch (proto) { | |
0896a725 | 567 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 568 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
569 | if (to->to_retries == 0) |
570 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 571 | if (to->to_initval == 0) |
259875ef | 572 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
573 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
574 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
575 | to->to_increment = to->to_initval; | |
576 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
577 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
578 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
579 | if (to->to_maxval < to->to_initval) | |
580 | to->to_maxval = to->to_initval; | |
5006a76c DH |
581 | to->to_exponential = 0; |
582 | break; | |
0896a725 | 583 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
584 | if (to->to_retries == 0) |
585 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 586 | if (!to->to_initval) |
259875ef | 587 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
588 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
589 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
590 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
591 | to->to_exponential = 1; | |
592 | break; | |
259875ef TM |
593 | default: |
594 | BUG(); | |
5006a76c DH |
595 | } |
596 | } | |
597 | ||
598 | /* | |
599 | * Create an RPC client handle | |
600 | */ | |
59dca3b2 | 601 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
602 | const struct rpc_timeout *timeparms, |
603 | rpc_authflavor_t flavor, | |
4a01b8a4 | 604 | int discrtry, int noresvport) |
5006a76c | 605 | { |
5006a76c | 606 | struct rpc_clnt *clnt = NULL; |
41877d20 | 607 | struct rpc_create_args args = { |
59dca3b2 | 608 | .protocol = clp->cl_proto, |
41877d20 | 609 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 610 | .addrsize = clp->cl_addrlen, |
33170233 | 611 | .timeout = timeparms, |
41877d20 CL |
612 | .servername = clp->cl_hostname, |
613 | .program = &nfs_program, | |
614 | .version = clp->rpc_ops->version, | |
615 | .authflavor = flavor, | |
616 | }; | |
5006a76c | 617 | |
4a01b8a4 CL |
618 | if (discrtry) |
619 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
620 | if (noresvport) | |
621 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
622 | ||
5006a76c DH |
623 | if (!IS_ERR(clp->cl_rpcclient)) |
624 | return 0; | |
625 | ||
41877d20 | 626 | clnt = rpc_create(&args); |
5006a76c DH |
627 | if (IS_ERR(clnt)) { |
628 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 629 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
630 | return PTR_ERR(clnt); |
631 | } | |
632 | ||
5006a76c DH |
633 | clp->cl_rpcclient = clnt; |
634 | return 0; | |
635 | } | |
54ceac45 DH |
636 | |
637 | /* | |
638 | * Version 2 or 3 client destruction | |
639 | */ | |
640 | static void nfs_destroy_server(struct nfs_server *server) | |
641 | { | |
5eebde23 SJ |
642 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
643 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 644 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
645 | } |
646 | ||
647 | /* | |
648 | * Version 2 or 3 lockd setup | |
649 | */ | |
650 | static int nfs_start_lockd(struct nfs_server *server) | |
651 | { | |
9289e7f9 CL |
652 | struct nlm_host *host; |
653 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
654 | struct nlmclnt_initdata nlm_init = { |
655 | .hostname = clp->cl_hostname, | |
656 | .address = (struct sockaddr *)&clp->cl_addr, | |
657 | .addrlen = clp->cl_addrlen, | |
883bb163 | 658 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
659 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
660 | 1 : 0, | |
883bb163 | 661 | }; |
54ceac45 | 662 | |
883bb163 | 663 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 664 | return 0; |
5eebde23 SJ |
665 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
666 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
667 | return 0; |
668 | ||
8a6e5deb TM |
669 | switch (clp->cl_proto) { |
670 | default: | |
671 | nlm_init.protocol = IPPROTO_TCP; | |
672 | break; | |
673 | case XPRT_TRANSPORT_UDP: | |
674 | nlm_init.protocol = IPPROTO_UDP; | |
675 | } | |
676 | ||
883bb163 | 677 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
678 | if (IS_ERR(host)) |
679 | return PTR_ERR(host); | |
680 | ||
681 | server->nlm_host = host; | |
682 | server->destroy = nfs_destroy_server; | |
683 | return 0; | |
54ceac45 DH |
684 | } |
685 | ||
686 | /* | |
687 | * Initialise an NFSv3 ACL client connection | |
688 | */ | |
689 | #ifdef CONFIG_NFS_V3_ACL | |
690 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
691 | { | |
40c55319 | 692 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
693 | goto out_noacl; |
694 | if (server->flags & NFS_MOUNT_NOACL) | |
695 | goto out_noacl; | |
696 | ||
697 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
698 | if (IS_ERR(server->client_acl)) | |
699 | goto out_noacl; | |
700 | ||
701 | /* No errors! Assume that Sun nfsacls are supported */ | |
702 | server->caps |= NFS_CAP_ACLS; | |
703 | return; | |
704 | ||
705 | out_noacl: | |
706 | server->caps &= ~NFS_CAP_ACLS; | |
707 | } | |
708 | #else | |
709 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
710 | { | |
711 | server->flags &= ~NFS_MOUNT_NOACL; | |
712 | server->caps &= ~NFS_CAP_ACLS; | |
713 | } | |
714 | #endif | |
715 | ||
716 | /* | |
717 | * Create a general RPC client | |
718 | */ | |
33170233 TM |
719 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
720 | const struct rpc_timeout *timeo, | |
721 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
722 | { |
723 | struct nfs_client *clp = server->nfs_client; | |
724 | ||
725 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
726 | if (IS_ERR(server->client)) { | |
3110ff80 | 727 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
728 | return PTR_ERR(server->client); |
729 | } | |
730 | ||
33170233 TM |
731 | memcpy(&server->client->cl_timeout_default, |
732 | timeo, | |
733 | sizeof(server->client->cl_timeout_default)); | |
734 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
735 | ||
54ceac45 DH |
736 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
737 | struct rpc_auth *auth; | |
738 | ||
739 | auth = rpcauth_create(pseudoflavour, server->client); | |
740 | if (IS_ERR(auth)) { | |
3110ff80 | 741 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
742 | return PTR_ERR(auth); |
743 | } | |
744 | } | |
745 | server->client->cl_softrtry = 0; | |
746 | if (server->flags & NFS_MOUNT_SOFT) | |
747 | server->client->cl_softrtry = 1; | |
748 | ||
54ceac45 DH |
749 | return 0; |
750 | } | |
751 | ||
752 | /* | |
753 | * Initialise an NFS2 or NFS3 client | |
754 | */ | |
2283f8d6 | 755 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 756 | const struct rpc_timeout *timeparms, |
2283f8d6 | 757 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 758 | { |
54ceac45 DH |
759 | int error; |
760 | ||
761 | if (clp->cl_cons_state == NFS_CS_READY) { | |
762 | /* the client is already initialised */ | |
763 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
764 | return 0; | |
765 | } | |
766 | ||
54ceac45 DH |
767 | /* |
768 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
769 | * - RFC 2623, sec 2.3.2 | |
770 | */ | |
d740351b CL |
771 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
772 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
773 | if (error < 0) |
774 | goto error; | |
775 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
776 | return 0; | |
777 | ||
778 | error: | |
779 | nfs_mark_client_ready(clp, error); | |
780 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
781 | return error; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Create a version 2 or 3 client | |
786 | */ | |
2283f8d6 TT |
787 | static int nfs_init_server(struct nfs_server *server, |
788 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 789 | { |
3a498026 TM |
790 | struct nfs_client_initdata cl_init = { |
791 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 792 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 793 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 794 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 795 | .proto = data->nfs_server.protocol, |
3a498026 | 796 | }; |
33170233 | 797 | struct rpc_timeout timeparms; |
54ceac45 | 798 | struct nfs_client *clp; |
3a498026 | 799 | int error; |
54ceac45 DH |
800 | |
801 | dprintk("--> nfs_init_server()\n"); | |
802 | ||
803 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 804 | if (data->version == 3) |
40c55319 | 805 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
806 | #endif |
807 | ||
808 | /* Allocate or find a client reference we can use */ | |
3a498026 | 809 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
810 | if (IS_ERR(clp)) { |
811 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
812 | return PTR_ERR(clp); | |
813 | } | |
814 | ||
33170233 TM |
815 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
816 | data->timeo, data->retrans); | |
817 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
818 | if (error < 0) |
819 | goto error; | |
820 | ||
821 | server->nfs_client = clp; | |
822 | ||
823 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 824 | server->flags = data->flags; |
b797cac7 | 825 | server->options = data->options; |
62ab460c TM |
826 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
827 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
828 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
829 | |
830 | if (data->rsize) | |
831 | server->rsize = nfs_block_size(data->rsize, NULL); | |
832 | if (data->wsize) | |
833 | server->wsize = nfs_block_size(data->wsize, NULL); | |
834 | ||
835 | server->acregmin = data->acregmin * HZ; | |
836 | server->acregmax = data->acregmax * HZ; | |
837 | server->acdirmin = data->acdirmin * HZ; | |
838 | server->acdirmax = data->acdirmax * HZ; | |
839 | ||
840 | /* Start lockd here, before we might error out */ | |
841 | error = nfs_start_lockd(server); | |
842 | if (error < 0) | |
843 | goto error; | |
844 | ||
f22d6d79 CL |
845 | server->port = data->nfs_server.port; |
846 | ||
33170233 | 847 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
848 | if (error < 0) |
849 | goto error; | |
850 | ||
3f8400d1 CL |
851 | /* Preserve the values of mount_server-related mount options */ |
852 | if (data->mount_server.addrlen) { | |
853 | memcpy(&server->mountd_address, &data->mount_server.address, | |
854 | data->mount_server.addrlen); | |
855 | server->mountd_addrlen = data->mount_server.addrlen; | |
856 | } | |
857 | server->mountd_version = data->mount_server.version; | |
858 | server->mountd_port = data->mount_server.port; | |
859 | server->mountd_protocol = data->mount_server.protocol; | |
860 | ||
54ceac45 DH |
861 | server->namelen = data->namlen; |
862 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
863 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
864 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
865 | return 0; | |
866 | ||
867 | error: | |
868 | server->nfs_client = NULL; | |
869 | nfs_put_client(clp); | |
870 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
871 | return error; | |
872 | } | |
873 | ||
874 | /* | |
875 | * Load up the server record from information gained in an fsinfo record | |
876 | */ | |
877 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
878 | { | |
879 | unsigned long max_rpc_payload; | |
880 | ||
881 | /* Work out a lot of parameters */ | |
882 | if (server->rsize == 0) | |
883 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
884 | if (server->wsize == 0) | |
885 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
886 | ||
887 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
888 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
889 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
890 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
891 | ||
892 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
893 | if (server->rsize > max_rpc_payload) | |
894 | server->rsize = max_rpc_payload; | |
895 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
896 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
897 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 898 | |
d993831f | 899 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
900 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
901 | ||
902 | if (server->wsize > max_rpc_payload) | |
903 | server->wsize = max_rpc_payload; | |
904 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
905 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
906 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
85e174ba RL |
907 | set_pnfs_layoutdriver(server, fsinfo->layouttype); |
908 | ||
54ceac45 DH |
909 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
910 | ||
911 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
912 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
913 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
914 | if (server->dtsize > server->rsize) |
915 | server->dtsize = server->rsize; | |
916 | ||
917 | if (server->flags & NFS_MOUNT_NOAC) { | |
918 | server->acregmin = server->acregmax = 0; | |
919 | server->acdirmin = server->acdirmax = 0; | |
920 | } | |
921 | ||
922 | server->maxfilesize = fsinfo->maxfilesize; | |
923 | ||
6b96724e RL |
924 | server->time_delta = fsinfo->time_delta; |
925 | ||
54ceac45 DH |
926 | /* We're airborne Set socket buffersize */ |
927 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
928 | } | |
929 | ||
930 | /* | |
931 | * Probe filesystem information, including the FSID on v2/v3 | |
932 | */ | |
933 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
934 | { | |
935 | struct nfs_fsinfo fsinfo; | |
936 | struct nfs_client *clp = server->nfs_client; | |
937 | int error; | |
938 | ||
939 | dprintk("--> nfs_probe_fsinfo()\n"); | |
940 | ||
941 | if (clp->rpc_ops->set_capabilities != NULL) { | |
942 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
943 | if (error < 0) | |
944 | goto out_error; | |
945 | } | |
946 | ||
947 | fsinfo.fattr = fattr; | |
85e174ba | 948 | fsinfo.layouttype = 0; |
54ceac45 DH |
949 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
950 | if (error < 0) | |
951 | goto out_error; | |
952 | ||
953 | nfs_server_set_fsinfo(server, &fsinfo); | |
954 | ||
955 | /* Get some general file system info */ | |
956 | if (server->namelen == 0) { | |
957 | struct nfs_pathconf pathinfo; | |
958 | ||
959 | pathinfo.fattr = fattr; | |
960 | nfs_fattr_init(fattr); | |
961 | ||
962 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
963 | server->namelen = pathinfo.max_namelen; | |
964 | } | |
965 | ||
966 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
967 | return 0; | |
968 | ||
969 | out_error: | |
970 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
971 | return error; | |
972 | } | |
973 | ||
974 | /* | |
975 | * Copy useful information when duplicating a server record | |
976 | */ | |
977 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
978 | { | |
979 | target->flags = source->flags; | |
356e76b8 CL |
980 | target->rsize = source->rsize; |
981 | target->wsize = source->wsize; | |
54ceac45 DH |
982 | target->acregmin = source->acregmin; |
983 | target->acregmax = source->acregmax; | |
984 | target->acdirmin = source->acdirmin; | |
985 | target->acdirmax = source->acdirmax; | |
986 | target->caps = source->caps; | |
2df54806 | 987 | target->options = source->options; |
54ceac45 DH |
988 | } |
989 | ||
990 | /* | |
991 | * Allocate and initialise a server record | |
992 | */ | |
993 | static struct nfs_server *nfs_alloc_server(void) | |
994 | { | |
995 | struct nfs_server *server; | |
996 | ||
997 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
998 | if (!server) | |
999 | return NULL; | |
1000 | ||
1001 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1002 | ||
1003 | /* Zero out the NFS state stuff */ | |
1004 | INIT_LIST_HEAD(&server->client_link); | |
1005 | INIT_LIST_HEAD(&server->master_link); | |
1006 | ||
ef818a28 SD |
1007 | atomic_set(&server->active, 0); |
1008 | ||
54ceac45 DH |
1009 | server->io_stats = nfs_alloc_iostats(); |
1010 | if (!server->io_stats) { | |
1011 | kfree(server); | |
1012 | return NULL; | |
1013 | } | |
1014 | ||
48d07649 JA |
1015 | if (bdi_init(&server->backing_dev_info)) { |
1016 | nfs_free_iostats(server->io_stats); | |
1017 | kfree(server); | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
54ceac45 DH |
1021 | return server; |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Free up a server record | |
1026 | */ | |
1027 | void nfs_free_server(struct nfs_server *server) | |
1028 | { | |
1029 | dprintk("--> nfs_free_server()\n"); | |
1030 | ||
85e174ba | 1031 | unset_pnfs_layoutdriver(server); |
54ceac45 DH |
1032 | spin_lock(&nfs_client_lock); |
1033 | list_del(&server->client_link); | |
1034 | list_del(&server->master_link); | |
1035 | spin_unlock(&nfs_client_lock); | |
1036 | ||
1037 | if (server->destroy != NULL) | |
1038 | server->destroy(server); | |
5cef338b TM |
1039 | |
1040 | if (!IS_ERR(server->client_acl)) | |
1041 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1042 | if (!IS_ERR(server->client)) |
1043 | rpc_shutdown_client(server->client); | |
1044 | ||
1045 | nfs_put_client(server->nfs_client); | |
1046 | ||
1047 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 1048 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1049 | kfree(server); |
1050 | nfs_release_automount_timer(); | |
1051 | dprintk("<-- nfs_free_server()\n"); | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Create a version 2 or 3 volume record | |
1056 | * - keyed on server and FSID | |
1057 | */ | |
2283f8d6 | 1058 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1059 | struct nfs_fh *mntfh) |
1060 | { | |
1061 | struct nfs_server *server; | |
fbca779a | 1062 | struct nfs_fattr *fattr; |
54ceac45 DH |
1063 | int error; |
1064 | ||
1065 | server = nfs_alloc_server(); | |
1066 | if (!server) | |
1067 | return ERR_PTR(-ENOMEM); | |
1068 | ||
fbca779a TM |
1069 | error = -ENOMEM; |
1070 | fattr = nfs_alloc_fattr(); | |
1071 | if (fattr == NULL) | |
1072 | goto error; | |
1073 | ||
54ceac45 DH |
1074 | /* Get a client representation */ |
1075 | error = nfs_init_server(server, data); | |
1076 | if (error < 0) | |
1077 | goto error; | |
1078 | ||
1079 | BUG_ON(!server->nfs_client); | |
1080 | BUG_ON(!server->nfs_client->rpc_ops); | |
1081 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1082 | ||
1083 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1084 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1085 | if (error < 0) |
1086 | goto error; | |
54af3bb5 TM |
1087 | if (server->nfs_client->rpc_ops->version == 3) { |
1088 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1089 | server->namelen = NFS3_MAXNAMLEN; | |
1090 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1091 | server->caps |= NFS_CAP_READDIRPLUS; | |
1092 | } else { | |
1093 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1094 | server->namelen = NFS2_MAXNAMLEN; | |
1095 | } | |
1096 | ||
fbca779a TM |
1097 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1098 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1099 | if (error < 0) { |
1100 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1101 | goto error; | |
1102 | } | |
1103 | } | |
fbca779a | 1104 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1105 | |
6daabf1b DH |
1106 | dprintk("Server FSID: %llx:%llx\n", |
1107 | (unsigned long long) server->fsid.major, | |
1108 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1109 | |
54ceac45 DH |
1110 | spin_lock(&nfs_client_lock); |
1111 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1112 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1113 | spin_unlock(&nfs_client_lock); | |
1114 | ||
1115 | server->mount_time = jiffies; | |
fbca779a | 1116 | nfs_free_fattr(fattr); |
54ceac45 DH |
1117 | return server; |
1118 | ||
1119 | error: | |
fbca779a | 1120 | nfs_free_fattr(fattr); |
54ceac45 DH |
1121 | nfs_free_server(server); |
1122 | return ERR_PTR(error); | |
1123 | } | |
1124 | ||
1125 | #ifdef CONFIG_NFS_V4 | |
9bdaa86d BH |
1126 | /* |
1127 | * Initialize the NFS4 callback service | |
1128 | */ | |
1129 | static int nfs4_init_callback(struct nfs_client *clp) | |
1130 | { | |
1131 | int error; | |
1132 | ||
1133 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1134 | if (nfs4_has_session(clp)) { |
1135 | error = xprt_setup_backchannel( | |
1136 | clp->cl_rpcclient->cl_xprt, | |
1137 | NFS41_BC_MIN_CALLBACKS); | |
1138 | if (error < 0) | |
1139 | return error; | |
1140 | } | |
1141 | ||
97dc1359 | 1142 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1143 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1144 | if (error < 0) { |
1145 | dprintk("%s: failed to start callback. Error = %d\n", | |
1146 | __func__, error); | |
1147 | return error; | |
1148 | } | |
1149 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1150 | } | |
1151 | return 0; | |
1152 | } | |
1153 | ||
557134a3 AA |
1154 | /* |
1155 | * Initialize the minor version specific parts of an NFS4 client record | |
1156 | */ | |
1157 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1158 | { | |
1159 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1160 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1161 | struct nfs4_session *session = NULL; |
1162 | /* | |
1163 | * Create the session and mark it expired. | |
1164 | * When a SEQUENCE operation encounters the expired session | |
1165 | * it will do session recovery to initialize it. | |
1166 | */ | |
1167 | session = nfs4_alloc_session(clp); | |
1168 | if (!session) | |
1169 | return -ENOMEM; | |
1170 | ||
1171 | clp->cl_session = session; | |
fe74ba3a TM |
1172 | /* |
1173 | * The create session reply races with the server back | |
1174 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1175 | * so that the client back channel can find the | |
1176 | * nfs_client struct | |
1177 | */ | |
1178 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1179 | } |
1180 | #endif /* CONFIG_NFS_V4_1 */ | |
1181 | ||
71468513 | 1182 | return nfs4_init_callback(clp); |
557134a3 AA |
1183 | } |
1184 | ||
54ceac45 DH |
1185 | /* |
1186 | * Initialise an NFS4 client record | |
1187 | */ | |
1188 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 1189 | const struct rpc_timeout *timeparms, |
7d9ac06f | 1190 | const char *ip_addr, |
d740351b CL |
1191 | rpc_authflavor_t authflavour, |
1192 | int flags) | |
54ceac45 DH |
1193 | { |
1194 | int error; | |
1195 | ||
1196 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1197 | /* the client is initialised already */ | |
1198 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1203 | clp->rpc_ops = &nfs_v4_clientops; | |
1204 | ||
59dca3b2 | 1205 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1206 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1207 | if (error < 0) |
1208 | goto error; | |
f4373bf9 | 1209 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1210 | |
1211 | error = nfs_idmap_new(clp); | |
1212 | if (error < 0) { | |
1213 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1214 | __func__, error); |
54ceac45 DH |
1215 | goto error; |
1216 | } | |
9c5bf38d | 1217 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1218 | |
557134a3 AA |
1219 | error = nfs4_init_client_minor_version(clp); |
1220 | if (error < 0) | |
1221 | goto error; | |
1222 | ||
76db6d95 AA |
1223 | if (!nfs4_has_session(clp)) |
1224 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1225 | return 0; |
1226 | ||
1227 | error: | |
1228 | nfs_mark_client_ready(clp, error); | |
1229 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1230 | return error; | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | * Set up an NFS4 client | |
1235 | */ | |
1236 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1237 | const char *hostname, |
1238 | const struct sockaddr *addr, | |
1239 | const size_t addrlen, | |
7d9ac06f | 1240 | const char *ip_addr, |
54ceac45 | 1241 | rpc_authflavor_t authflavour, |
94a417f3 BH |
1242 | int proto, const struct rpc_timeout *timeparms, |
1243 | u32 minorversion) | |
54ceac45 | 1244 | { |
3a498026 TM |
1245 | struct nfs_client_initdata cl_init = { |
1246 | .hostname = hostname, | |
dcecae0f CL |
1247 | .addr = addr, |
1248 | .addrlen = addrlen, | |
40c55319 | 1249 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1250 | .proto = proto, |
5aae4a9a | 1251 | .minorversion = minorversion, |
3a498026 | 1252 | }; |
54ceac45 DH |
1253 | struct nfs_client *clp; |
1254 | int error; | |
1255 | ||
1256 | dprintk("--> nfs4_set_client()\n"); | |
1257 | ||
1258 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1259 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1260 | if (IS_ERR(clp)) { |
1261 | error = PTR_ERR(clp); | |
1262 | goto error; | |
1263 | } | |
d740351b CL |
1264 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1265 | server->flags); | |
54ceac45 DH |
1266 | if (error < 0) |
1267 | goto error_put; | |
1268 | ||
1269 | server->nfs_client = clp; | |
1270 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1271 | return 0; | |
1272 | ||
1273 | error_put: | |
1274 | nfs_put_client(clp); | |
1275 | error: | |
1276 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1277 | return error; | |
1278 | } | |
1279 | ||
557134a3 | 1280 | |
96b09e02 AA |
1281 | /* |
1282 | * Session has been established, and the client marked ready. | |
1283 | * Set the mount rsize and wsize with negotiated fore channel | |
1284 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1285 | */ | |
1286 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1287 | { | |
1288 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1289 | struct nfs4_session *sess; |
1290 | u32 server_resp_sz; | |
1291 | u32 server_rqst_sz; | |
1292 | ||
96b09e02 AA |
1293 | if (!nfs4_has_session(server->nfs_client)) |
1294 | return; | |
2449ea2e AB |
1295 | sess = server->nfs_client->cl_session; |
1296 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1297 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1298 | ||
1299 | if (server->rsize > server_resp_sz) | |
1300 | server->rsize = server_resp_sz; | |
1301 | if (server->wsize > server_rqst_sz) | |
1302 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1303 | #endif /* CONFIG_NFS_V4_1 */ |
1304 | } | |
1305 | ||
44950b67 TM |
1306 | static int nfs4_server_common_setup(struct nfs_server *server, |
1307 | struct nfs_fh *mntfh) | |
1308 | { | |
1309 | struct nfs_fattr *fattr; | |
1310 | int error; | |
1311 | ||
1312 | BUG_ON(!server->nfs_client); | |
1313 | BUG_ON(!server->nfs_client->rpc_ops); | |
1314 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1315 | ||
1316 | fattr = nfs_alloc_fattr(); | |
1317 | if (fattr == NULL) | |
1318 | return -ENOMEM; | |
1319 | ||
1320 | /* We must ensure the session is initialised first */ | |
1321 | error = nfs4_init_session(server); | |
1322 | if (error < 0) | |
1323 | goto out; | |
1324 | ||
1325 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1326 | error = nfs4_get_rootfh(server, mntfh); | |
1327 | if (error < 0) | |
1328 | goto out; | |
1329 | ||
1330 | dprintk("Server FSID: %llx:%llx\n", | |
1331 | (unsigned long long) server->fsid.major, | |
1332 | (unsigned long long) server->fsid.minor); | |
1333 | dprintk("Mount FH: %d\n", mntfh->size); | |
1334 | ||
1335 | nfs4_session_set_rwsize(server); | |
1336 | ||
1337 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1338 | if (error < 0) | |
1339 | goto out; | |
1340 | ||
1341 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1342 | server->namelen = NFS4_MAXNAMLEN; | |
1343 | ||
1344 | spin_lock(&nfs_client_lock); | |
1345 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1346 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1347 | spin_unlock(&nfs_client_lock); | |
1348 | ||
1349 | server->mount_time = jiffies; | |
1350 | out: | |
1351 | nfs_free_fattr(fattr); | |
1352 | return error; | |
1353 | } | |
1354 | ||
54ceac45 DH |
1355 | /* |
1356 | * Create a version 4 volume record | |
1357 | */ | |
1358 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1359 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1360 | { |
33170233 | 1361 | struct rpc_timeout timeparms; |
54ceac45 DH |
1362 | int error; |
1363 | ||
1364 | dprintk("--> nfs4_init_server()\n"); | |
1365 | ||
33170233 TM |
1366 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1367 | data->timeo, data->retrans); | |
1368 | ||
542fcc33 CL |
1369 | /* Initialise the client representation from the mount data */ |
1370 | server->flags = data->flags; | |
82f2e547 BS |
1371 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1372 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1373 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1374 | server->options = data->options; |
542fcc33 | 1375 | |
33170233 TM |
1376 | /* Get a client record */ |
1377 | error = nfs4_set_client(server, | |
1378 | data->nfs_server.hostname, | |
1379 | (const struct sockaddr *)&data->nfs_server.address, | |
1380 | data->nfs_server.addrlen, | |
1381 | data->client_address, | |
1382 | data->auth_flavors[0], | |
1383 | data->nfs_server.protocol, | |
94a417f3 BH |
1384 | &timeparms, |
1385 | data->minorversion); | |
33170233 TM |
1386 | if (error < 0) |
1387 | goto error; | |
1388 | ||
54ceac45 DH |
1389 | if (data->rsize) |
1390 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1391 | if (data->wsize) | |
1392 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1393 | ||
1394 | server->acregmin = data->acregmin * HZ; | |
1395 | server->acregmax = data->acregmax * HZ; | |
1396 | server->acdirmin = data->acdirmin * HZ; | |
1397 | server->acdirmax = data->acdirmax * HZ; | |
1398 | ||
f22d6d79 CL |
1399 | server->port = data->nfs_server.port; |
1400 | ||
33170233 | 1401 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1402 | |
33170233 | 1403 | error: |
54ceac45 DH |
1404 | /* Done */ |
1405 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1406 | return error; | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * Create a version 4 volume record | |
1411 | * - keyed on server and FSID | |
1412 | */ | |
91ea40b9 | 1413 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1414 | struct nfs_fh *mntfh) |
1415 | { | |
54ceac45 DH |
1416 | struct nfs_server *server; |
1417 | int error; | |
1418 | ||
1419 | dprintk("--> nfs4_create_server()\n"); | |
1420 | ||
1421 | server = nfs_alloc_server(); | |
1422 | if (!server) | |
1423 | return ERR_PTR(-ENOMEM); | |
1424 | ||
54ceac45 | 1425 | /* set up the general RPC client */ |
91ea40b9 | 1426 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1427 | if (error < 0) |
1428 | goto error; | |
1429 | ||
44950b67 | 1430 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1431 | if (error < 0) |
1432 | goto error; | |
1433 | ||
54ceac45 DH |
1434 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1435 | return server; | |
1436 | ||
1437 | error: | |
1438 | nfs_free_server(server); | |
1439 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1440 | return ERR_PTR(error); | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * Create an NFS4 referral server record | |
1445 | */ | |
1446 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1447 | struct nfs_fh *mntfh) |
54ceac45 DH |
1448 | { |
1449 | struct nfs_client *parent_client; | |
1450 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1451 | int error; |
1452 | ||
1453 | dprintk("--> nfs4_create_referral_server()\n"); | |
1454 | ||
1455 | server = nfs_alloc_server(); | |
1456 | if (!server) | |
1457 | return ERR_PTR(-ENOMEM); | |
1458 | ||
1459 | parent_server = NFS_SB(data->sb); | |
1460 | parent_client = parent_server->nfs_client; | |
1461 | ||
542fcc33 CL |
1462 | /* Initialise the client representation from the parent server */ |
1463 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1464 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1465 | |
54ceac45 DH |
1466 | /* Get a client representation. |
1467 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1468 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1469 | data->addr, |
1470 | data->addrlen, | |
dcecae0f CL |
1471 | parent_client->cl_ipaddr, |
1472 | data->authflavor, | |
1473 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1474 | parent_server->client->cl_timeout, |
97dc1359 | 1475 | parent_client->cl_mvops->minor_version); |
297de4f6 AA |
1476 | if (error < 0) |
1477 | goto error; | |
54ceac45 | 1478 | |
33170233 | 1479 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1480 | if (error < 0) |
1481 | goto error; | |
1482 | ||
44950b67 | 1483 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1484 | if (error < 0) |
1485 | goto error; | |
1486 | ||
54ceac45 DH |
1487 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1488 | return server; | |
1489 | ||
1490 | error: | |
1491 | nfs_free_server(server); | |
1492 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1493 | return ERR_PTR(error); | |
1494 | } | |
1495 | ||
1496 | #endif /* CONFIG_NFS_V4 */ | |
1497 | ||
1498 | /* | |
1499 | * Clone an NFS2, NFS3 or NFS4 server record | |
1500 | */ | |
1501 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1502 | struct nfs_fh *fh, | |
1503 | struct nfs_fattr *fattr) | |
1504 | { | |
1505 | struct nfs_server *server; | |
fbca779a | 1506 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1507 | int error; |
1508 | ||
1509 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1510 | (unsigned long long) fattr->fsid.major, |
1511 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1512 | |
1513 | server = nfs_alloc_server(); | |
1514 | if (!server) | |
1515 | return ERR_PTR(-ENOMEM); | |
1516 | ||
fbca779a TM |
1517 | error = -ENOMEM; |
1518 | fattr_fsinfo = nfs_alloc_fattr(); | |
1519 | if (fattr_fsinfo == NULL) | |
1520 | goto out_free_server; | |
1521 | ||
54ceac45 DH |
1522 | /* Copy data from the source */ |
1523 | server->nfs_client = source->nfs_client; | |
1524 | atomic_inc(&server->nfs_client->cl_count); | |
1525 | nfs_server_copy_userdata(server, source); | |
1526 | ||
1527 | server->fsid = fattr->fsid; | |
1528 | ||
33170233 TM |
1529 | error = nfs_init_server_rpcclient(server, |
1530 | source->client->cl_timeout, | |
1531 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1532 | if (error < 0) |
1533 | goto out_free_server; | |
1534 | if (!IS_ERR(source->client_acl)) | |
1535 | nfs_init_server_aclclient(server); | |
1536 | ||
1537 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1538 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1539 | if (error < 0) |
1540 | goto out_free_server; | |
1541 | ||
54af3bb5 TM |
1542 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1543 | server->namelen = NFS4_MAXNAMLEN; | |
1544 | ||
54ceac45 | 1545 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1546 | (unsigned long long) server->fsid.major, |
1547 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1548 | |
1549 | error = nfs_start_lockd(server); | |
1550 | if (error < 0) | |
1551 | goto out_free_server; | |
1552 | ||
1553 | spin_lock(&nfs_client_lock); | |
1554 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1555 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1556 | spin_unlock(&nfs_client_lock); | |
1557 | ||
1558 | server->mount_time = jiffies; | |
1559 | ||
fbca779a | 1560 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1561 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1562 | return server; | |
1563 | ||
1564 | out_free_server: | |
fbca779a | 1565 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1566 | nfs_free_server(server); |
1567 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1568 | return ERR_PTR(error); | |
1569 | } | |
6aaca566 DH |
1570 | |
1571 | #ifdef CONFIG_PROC_FS | |
1572 | static struct proc_dir_entry *proc_fs_nfs; | |
1573 | ||
1574 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1575 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1576 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1577 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1578 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1579 | ||
88e9d34c | 1580 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1581 | .start = nfs_server_list_start, |
1582 | .next = nfs_server_list_next, | |
1583 | .stop = nfs_server_list_stop, | |
1584 | .show = nfs_server_list_show, | |
1585 | }; | |
1586 | ||
00977a59 | 1587 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1588 | .open = nfs_server_list_open, |
1589 | .read = seq_read, | |
1590 | .llseek = seq_lseek, | |
1591 | .release = seq_release, | |
34b37235 | 1592 | .owner = THIS_MODULE, |
6aaca566 DH |
1593 | }; |
1594 | ||
1595 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1596 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1597 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1598 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1599 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1600 | ||
88e9d34c | 1601 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1602 | .start = nfs_volume_list_start, |
1603 | .next = nfs_volume_list_next, | |
1604 | .stop = nfs_volume_list_stop, | |
1605 | .show = nfs_volume_list_show, | |
1606 | }; | |
1607 | ||
00977a59 | 1608 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1609 | .open = nfs_volume_list_open, |
1610 | .read = seq_read, | |
1611 | .llseek = seq_lseek, | |
1612 | .release = seq_release, | |
34b37235 | 1613 | .owner = THIS_MODULE, |
6aaca566 DH |
1614 | }; |
1615 | ||
1616 | /* | |
1617 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1618 | * we're dealing | |
1619 | */ | |
1620 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1621 | { | |
1622 | struct seq_file *m; | |
1623 | int ret; | |
1624 | ||
1625 | ret = seq_open(file, &nfs_server_list_ops); | |
1626 | if (ret < 0) | |
1627 | return ret; | |
1628 | ||
1629 | m = file->private_data; | |
1630 | m->private = PDE(inode)->data; | |
1631 | ||
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * set up the iterator to start reading from the server list and return the first item | |
1637 | */ | |
1638 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1639 | { | |
6aaca566 DH |
1640 | /* lock the list against modification */ |
1641 | spin_lock(&nfs_client_lock); | |
259902ea | 1642 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1643 | } |
1644 | ||
1645 | /* | |
1646 | * move to next server | |
1647 | */ | |
1648 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1649 | { | |
259902ea | 1650 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1651 | } |
1652 | ||
1653 | /* | |
1654 | * clean up after reading from the transports list | |
1655 | */ | |
1656 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1657 | { | |
1658 | spin_unlock(&nfs_client_lock); | |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * display a header line followed by a load of call lines | |
1663 | */ | |
1664 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1665 | { | |
1666 | struct nfs_client *clp; | |
1667 | ||
1668 | /* display header on line 1 */ | |
259902ea | 1669 | if (v == &nfs_client_list) { |
6aaca566 DH |
1670 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1671 | return 0; | |
1672 | } | |
1673 | ||
1674 | /* display one transport per line on subsequent lines */ | |
1675 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1676 | ||
5d8515ca | 1677 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1678 | clp->rpc_ops->version, |
5d8515ca CL |
1679 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1680 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1681 | atomic_read(&clp->cl_count), |
1682 | clp->cl_hostname); | |
1683 | ||
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1689 | */ | |
1690 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1691 | { | |
1692 | struct seq_file *m; | |
1693 | int ret; | |
1694 | ||
1695 | ret = seq_open(file, &nfs_volume_list_ops); | |
1696 | if (ret < 0) | |
1697 | return ret; | |
1698 | ||
1699 | m = file->private_data; | |
1700 | m->private = PDE(inode)->data; | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | /* | |
1706 | * set up the iterator to start reading from the volume list and return the first item | |
1707 | */ | |
1708 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1709 | { | |
6aaca566 DH |
1710 | /* lock the list against modification */ |
1711 | spin_lock(&nfs_client_lock); | |
259902ea | 1712 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1713 | } |
1714 | ||
1715 | /* | |
1716 | * move to next volume | |
1717 | */ | |
1718 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1719 | { | |
259902ea | 1720 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1721 | } |
1722 | ||
1723 | /* | |
1724 | * clean up after reading from the transports list | |
1725 | */ | |
1726 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1727 | { | |
1728 | spin_unlock(&nfs_client_lock); | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * display a header line followed by a load of call lines | |
1733 | */ | |
1734 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1735 | { | |
1736 | struct nfs_server *server; | |
1737 | struct nfs_client *clp; | |
1738 | char dev[8], fsid[17]; | |
1739 | ||
1740 | /* display header on line 1 */ | |
259902ea | 1741 | if (v == &nfs_volume_list) { |
5d1acff1 | 1742 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1743 | return 0; |
1744 | } | |
1745 | /* display one transport per line on subsequent lines */ | |
1746 | server = list_entry(v, struct nfs_server, master_link); | |
1747 | clp = server->nfs_client; | |
1748 | ||
1749 | snprintf(dev, 8, "%u:%u", | |
1750 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1751 | ||
1752 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1753 | (unsigned long long) server->fsid.major, |
1754 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1755 | |
5d1acff1 | 1756 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1757 | clp->rpc_ops->version, |
5d8515ca CL |
1758 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1759 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1760 | dev, |
5d1acff1 DH |
1761 | fsid, |
1762 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1763 | |
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * initialise the /proc/fs/nfsfs/ directory | |
1769 | */ | |
1770 | int __init nfs_fs_proc_init(void) | |
1771 | { | |
1772 | struct proc_dir_entry *p; | |
1773 | ||
36a5aeb8 | 1774 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1775 | if (!proc_fs_nfs) |
1776 | goto error_0; | |
1777 | ||
6aaca566 | 1778 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1779 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1780 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1781 | if (!p) |
1782 | goto error_1; | |
1783 | ||
6aaca566 | 1784 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1785 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1786 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1787 | if (!p) |
1788 | goto error_2; | |
6aaca566 DH |
1789 | return 0; |
1790 | ||
1791 | error_2: | |
1792 | remove_proc_entry("servers", proc_fs_nfs); | |
1793 | error_1: | |
36a5aeb8 | 1794 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1795 | error_0: |
1796 | return -ENOMEM; | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * clean up the /proc/fs/nfsfs/ directory | |
1801 | */ | |
1802 | void nfs_fs_proc_exit(void) | |
1803 | { | |
1804 | remove_proc_entry("volumes", proc_fs_nfs); | |
1805 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1806 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1807 | } |
1808 | ||
1809 | #endif /* CONFIG_PROC_FS */ |