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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" |
24c8dbbb DH |
51 | |
52 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
53 | ||
54 | static DEFINE_SPINLOCK(nfs_client_lock); | |
55 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 56 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb DH |
57 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
58 | ||
5006a76c DH |
59 | /* |
60 | * RPC cruft for NFS | |
61 | */ | |
62 | static struct rpc_version *nfs_version[5] = { | |
63 | [2] = &nfs_version2, | |
64 | #ifdef CONFIG_NFS_V3 | |
65 | [3] = &nfs_version3, | |
66 | #endif | |
67 | #ifdef CONFIG_NFS_V4 | |
68 | [4] = &nfs_version4, | |
69 | #endif | |
70 | }; | |
71 | ||
72 | struct rpc_program nfs_program = { | |
73 | .name = "nfs", | |
74 | .number = NFS_PROGRAM, | |
75 | .nrvers = ARRAY_SIZE(nfs_version), | |
76 | .version = nfs_version, | |
77 | .stats = &nfs_rpcstat, | |
78 | .pipe_dir_name = "/nfs", | |
79 | }; | |
80 | ||
81 | struct rpc_stat nfs_rpcstat = { | |
82 | .program = &nfs_program | |
83 | }; | |
84 | ||
85 | ||
86 | #ifdef CONFIG_NFS_V3_ACL | |
87 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
88 | static struct rpc_version * nfsacl_version[] = { | |
89 | [3] = &nfsacl_version3, | |
90 | }; | |
91 | ||
92 | struct rpc_program nfsacl_program = { | |
93 | .name = "nfsacl", | |
94 | .number = NFS_ACL_PROGRAM, | |
95 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
96 | .version = nfsacl_version, | |
97 | .stats = &nfsacl_rpcstat, | |
98 | }; | |
99 | #endif /* CONFIG_NFS_V3_ACL */ | |
100 | ||
3a498026 TM |
101 | struct nfs_client_initdata { |
102 | const char *hostname; | |
d7422c47 | 103 | const struct sockaddr *addr; |
6e4cffd7 | 104 | size_t addrlen; |
40c55319 | 105 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 106 | int proto; |
5aae4a9a | 107 | u32 minorversion; |
3a498026 TM |
108 | }; |
109 | ||
24c8dbbb DH |
110 | /* |
111 | * Allocate a shared client record | |
112 | * | |
113 | * Since these are allocated/deallocated very rarely, we don't | |
114 | * bother putting them in a slab cache... | |
115 | */ | |
3a498026 | 116 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
117 | { |
118 | struct nfs_client *clp; | |
7c67db3a | 119 | struct rpc_cred *cred; |
a21bdd9b | 120 | int err = -ENOMEM; |
24c8dbbb DH |
121 | |
122 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
123 | goto error_0; | |
124 | ||
40c55319 TM |
125 | clp->rpc_ops = cl_init->rpc_ops; |
126 | ||
24c8dbbb DH |
127 | atomic_set(&clp->cl_count, 1); |
128 | clp->cl_cons_state = NFS_CS_INITING; | |
129 | ||
6e4cffd7 CL |
130 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
131 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 132 | |
3a498026 | 133 | if (cl_init->hostname) { |
a21bdd9b | 134 | err = -ENOMEM; |
3a498026 | 135 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 136 | if (!clp->cl_hostname) |
71468513 | 137 | goto error_cleanup; |
24c8dbbb DH |
138 | } |
139 | ||
140 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
141 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
142 | ||
59dca3b2 TM |
143 | clp->cl_proto = cl_init->proto; |
144 | ||
24c8dbbb | 145 | #ifdef CONFIG_NFS_V4 |
24c8dbbb | 146 | INIT_LIST_HEAD(&clp->cl_delegations); |
24c8dbbb | 147 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 148 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
149 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
150 | clp->cl_boot_time = CURRENT_TIME; | |
151 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
5aae4a9a | 152 | clp->cl_minorversion = cl_init->minorversion; |
97dc1359 | 153 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
24c8dbbb | 154 | #endif |
7c67db3a TM |
155 | cred = rpc_lookup_machine_cred(); |
156 | if (!IS_ERR(cred)) | |
157 | clp->cl_machine_cred = cred; | |
24c8dbbb | 158 | |
14727281 DH |
159 | nfs_fscache_get_client_cookie(clp); |
160 | ||
24c8dbbb DH |
161 | return clp; |
162 | ||
71468513 | 163 | error_cleanup: |
24c8dbbb DH |
164 | kfree(clp); |
165 | error_0: | |
a21bdd9b | 166 | return ERR_PTR(err); |
24c8dbbb DH |
167 | } |
168 | ||
5dd3177a | 169 | #ifdef CONFIG_NFS_V4 |
557134a3 AA |
170 | /* |
171 | * Clears/puts all minor version specific parts from an nfs_client struct | |
172 | * reverting it to minorversion 0. | |
173 | */ | |
174 | static void nfs4_clear_client_minor_version(struct nfs_client *clp) | |
175 | { | |
176 | #ifdef CONFIG_NFS_V4_1 | |
177 | if (nfs4_has_session(clp)) { | |
178 | nfs4_destroy_session(clp->cl_session); | |
179 | clp->cl_session = NULL; | |
180 | } | |
cccef3b9 | 181 | |
97dc1359 | 182 | clp->cl_mvops = nfs_v4_minor_ops[0]; |
557134a3 | 183 | #endif /* CONFIG_NFS_V4_1 */ |
888ef2e3 | 184 | } |
71468513 | 185 | |
888ef2e3 AB |
186 | /* |
187 | * Destroy the NFS4 callback service | |
188 | */ | |
189 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
190 | { | |
191 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 192 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
193 | } |
194 | ||
195 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
196 | { | |
197 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
198 | nfs4_kill_renewd(clp); | |
199 | nfs4_clear_client_minor_version(clp); | |
71468513 | 200 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
201 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
202 | nfs_idmap_delete(clp); | |
203 | ||
204 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
557134a3 | 205 | } |
888ef2e3 AB |
206 | #else |
207 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
208 | { | |
209 | } | |
210 | #endif /* CONFIG_NFS_V4 */ | |
557134a3 | 211 | |
24c8dbbb DH |
212 | /* |
213 | * Destroy a shared client record | |
214 | */ | |
215 | static void nfs_free_client(struct nfs_client *clp) | |
216 | { | |
40c55319 | 217 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 218 | |
5dd3177a | 219 | nfs4_shutdown_client(clp); |
24c8dbbb | 220 | |
14727281 DH |
221 | nfs_fscache_release_client_cookie(clp); |
222 | ||
24c8dbbb DH |
223 | /* -EIO all pending I/O */ |
224 | if (!IS_ERR(clp->cl_rpcclient)) | |
225 | rpc_shutdown_client(clp->cl_rpcclient); | |
226 | ||
7c67db3a TM |
227 | if (clp->cl_machine_cred != NULL) |
228 | put_rpccred(clp->cl_machine_cred); | |
229 | ||
24c8dbbb DH |
230 | kfree(clp->cl_hostname); |
231 | kfree(clp); | |
232 | ||
233 | dprintk("<-- nfs_free_client()\n"); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Release a reference to a shared client record | |
238 | */ | |
239 | void nfs_put_client(struct nfs_client *clp) | |
240 | { | |
27ba8512 DH |
241 | if (!clp) |
242 | return; | |
243 | ||
24c8dbbb DH |
244 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
245 | ||
246 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
247 | list_del(&clp->cl_share_link); | |
248 | spin_unlock(&nfs_client_lock); | |
249 | ||
250 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
251 | ||
252 | nfs_free_client(clp); | |
253 | } | |
254 | } | |
255 | ||
9082a5cc | 256 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
257 | /* |
258 | * Test if two ip6 socket addresses refer to the same socket by | |
259 | * comparing relevant fields. The padding bytes specifically, are not | |
260 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
261 | * and sin6_scope_id is only compared if the address is "link local" | |
262 | * because "link local" addresses need only be unique to a specific | |
263 | * link. Conversely, ordinary unicast addresses might have different | |
264 | * sin6_scope_id. | |
265 | * | |
266 | * The caller should ensure both socket addresses are AF_INET6. | |
267 | */ | |
3c8c45df CL |
268 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
269 | const struct sockaddr *sa2) | |
9f4c899c | 270 | { |
3c8c45df CL |
271 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
272 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 273 | |
3c8c45df CL |
274 | if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && |
275 | sin1->sin6_scope_id != sin2->sin6_scope_id) | |
9f4c899c | 276 | return 0; |
3b0d3f93 | 277 | |
3c8c45df | 278 | return ipv6_addr_equal(&sin1->sin6_addr, &sin1->sin6_addr); |
3b0d3f93 | 279 | } |
3c8c45df CL |
280 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
281 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
282 | const struct sockaddr *sa2) | |
9f4c899c TM |
283 | { |
284 | return 0; | |
285 | } | |
9082a5cc | 286 | #endif |
3b0d3f93 | 287 | |
d7371c41 ID |
288 | /* |
289 | * Test if two ip4 socket addresses refer to the same socket, by | |
290 | * comparing relevant fields. The padding bytes specifically, are | |
291 | * not compared. | |
292 | * | |
293 | * The caller should ensure both socket addresses are AF_INET. | |
294 | */ | |
3c8c45df CL |
295 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
296 | const struct sockaddr *sa2) | |
297 | { | |
298 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
299 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
300 | ||
301 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
302 | } | |
303 | ||
304 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
305 | const struct sockaddr *sa2) | |
306 | { | |
307 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
308 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
309 | ||
310 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
311 | (sin1->sin6_port == sin2->sin6_port); | |
312 | } | |
313 | ||
9f4c899c TM |
314 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
315 | const struct sockaddr *sa2) | |
d7371c41 | 316 | { |
3c8c45df CL |
317 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
318 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 319 | |
3c8c45df CL |
320 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
321 | (sin1->sin_port == sin2->sin_port); | |
322 | } | |
323 | ||
324 | /* | |
325 | * Test if two socket addresses represent the same actual socket, | |
326 | * by comparing (only) relevant fields, excluding the port number. | |
327 | */ | |
328 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
329 | const struct sockaddr *sa2) | |
330 | { | |
331 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 332 | return 0; |
3c8c45df CL |
333 | |
334 | switch (sa1->sa_family) { | |
335 | case AF_INET: | |
336 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
337 | case AF_INET6: | |
338 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
339 | } | |
340 | return 0; | |
d7371c41 ID |
341 | } |
342 | ||
d7371c41 ID |
343 | /* |
344 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 345 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
346 | */ |
347 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
348 | const struct sockaddr *sa2) | |
349 | { | |
350 | if (sa1->sa_family != sa2->sa_family) | |
351 | return 0; | |
352 | ||
353 | switch (sa1->sa_family) { | |
354 | case AF_INET: | |
9f4c899c | 355 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 356 | case AF_INET6: |
9f4c899c | 357 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
358 | } |
359 | return 0; | |
360 | } | |
361 | ||
24c8dbbb | 362 | /* |
c81468a1 TM |
363 | * Find a client by IP address and protocol version |
364 | * - returns NULL if no such client | |
24c8dbbb | 365 | */ |
ff052645 | 366 | struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) |
24c8dbbb DH |
367 | { |
368 | struct nfs_client *clp; | |
369 | ||
c81468a1 | 370 | spin_lock(&nfs_client_lock); |
24c8dbbb | 371 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
3b0d3f93 TM |
372 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
373 | ||
13bbc06a | 374 | /* Don't match clients that failed to initialise properly */ |
76db6d95 AA |
375 | if (!(clp->cl_cons_state == NFS_CS_READY || |
376 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
13bbc06a TM |
377 | continue; |
378 | ||
24c8dbbb | 379 | /* Different NFS versions cannot share the same nfs_client */ |
40c55319 | 380 | if (clp->rpc_ops->version != nfsversion) |
24c8dbbb DH |
381 | continue; |
382 | ||
c81468a1 | 383 | /* Match only the IP address, not the port number */ |
3b0d3f93 | 384 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) |
24c8dbbb DH |
385 | continue; |
386 | ||
c81468a1 TM |
387 | atomic_inc(&clp->cl_count); |
388 | spin_unlock(&nfs_client_lock); | |
389 | return clp; | |
24c8dbbb | 390 | } |
c81468a1 | 391 | spin_unlock(&nfs_client_lock); |
24c8dbbb | 392 | return NULL; |
24c8dbbb DH |
393 | } |
394 | ||
3fbd67ad TM |
395 | /* |
396 | * Find a client by IP address and protocol version | |
397 | * - returns NULL if no such client | |
398 | */ | |
399 | struct nfs_client *nfs_find_client_next(struct nfs_client *clp) | |
400 | { | |
401 | struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; | |
402 | u32 nfsvers = clp->rpc_ops->version; | |
403 | ||
404 | spin_lock(&nfs_client_lock); | |
405 | list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { | |
406 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
407 | ||
408 | /* Don't match clients that failed to initialise properly */ | |
409 | if (clp->cl_cons_state != NFS_CS_READY) | |
410 | continue; | |
411 | ||
412 | /* Different NFS versions cannot share the same nfs_client */ | |
413 | if (clp->rpc_ops->version != nfsvers) | |
414 | continue; | |
415 | ||
3fbd67ad TM |
416 | /* Match only the IP address, not the port number */ |
417 | if (!nfs_sockaddr_match_ipaddr(sap, clap)) | |
418 | continue; | |
419 | ||
420 | atomic_inc(&clp->cl_count); | |
421 | spin_unlock(&nfs_client_lock); | |
422 | return clp; | |
423 | } | |
424 | spin_unlock(&nfs_client_lock); | |
425 | return NULL; | |
426 | } | |
427 | ||
24c8dbbb | 428 | /* |
c81468a1 TM |
429 | * Find an nfs_client on the list that matches the initialisation data |
430 | * that is supplied. | |
24c8dbbb | 431 | */ |
c81468a1 | 432 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
433 | { |
434 | struct nfs_client *clp; | |
d7371c41 | 435 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 436 | |
c81468a1 | 437 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 438 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
439 | /* Don't match clients that failed to initialise properly */ |
440 | if (clp->cl_cons_state < 0) | |
441 | continue; | |
442 | ||
443 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 444 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
445 | continue; |
446 | ||
59dca3b2 TM |
447 | if (clp->cl_proto != data->proto) |
448 | continue; | |
5aae4a9a BH |
449 | /* Match nfsv4 minorversion */ |
450 | if (clp->cl_minorversion != data->minorversion) | |
451 | continue; | |
c81468a1 | 452 | /* Match the full socket address */ |
d7371c41 | 453 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
454 | continue; |
455 | ||
456 | atomic_inc(&clp->cl_count); | |
457 | return clp; | |
13bbc06a | 458 | } |
c81468a1 | 459 | return NULL; |
24c8dbbb DH |
460 | } |
461 | ||
462 | /* | |
463 | * Look up a client by IP address and protocol version | |
464 | * - creates a new record if one doesn't yet exist | |
465 | */ | |
3a498026 | 466 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
467 | { |
468 | struct nfs_client *clp, *new = NULL; | |
469 | int error; | |
470 | ||
d7422c47 CL |
471 | dprintk("--> nfs_get_client(%s,v%u)\n", |
472 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
473 | |
474 | /* see if the client already exists */ | |
475 | do { | |
476 | spin_lock(&nfs_client_lock); | |
477 | ||
c81468a1 | 478 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
479 | if (clp) |
480 | goto found_client; | |
481 | if (new) | |
482 | goto install_client; | |
483 | ||
484 | spin_unlock(&nfs_client_lock); | |
485 | ||
3a498026 | 486 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 487 | } while (!IS_ERR(new)); |
24c8dbbb | 488 | |
a21bdd9b CL |
489 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
490 | return new; | |
24c8dbbb DH |
491 | |
492 | /* install a new client and return with it unready */ | |
493 | install_client: | |
494 | clp = new; | |
495 | list_add(&clp->cl_share_link, &nfs_client_list); | |
496 | spin_unlock(&nfs_client_lock); | |
497 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
498 | return clp; | |
499 | ||
500 | /* found an existing client | |
501 | * - make sure it's ready before returning | |
502 | */ | |
503 | found_client: | |
504 | spin_unlock(&nfs_client_lock); | |
505 | ||
506 | if (new) | |
507 | nfs_free_client(new); | |
508 | ||
150030b7 | 509 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 510 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
511 | if (error < 0) { |
512 | nfs_put_client(clp); | |
513 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
514 | } |
515 | ||
516 | if (clp->cl_cons_state < NFS_CS_READY) { | |
517 | error = clp->cl_cons_state; | |
518 | nfs_put_client(clp); | |
519 | return ERR_PTR(error); | |
520 | } | |
521 | ||
54ceac45 DH |
522 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
523 | ||
24c8dbbb DH |
524 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
525 | return clp; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Mark a server as ready or failed | |
530 | */ | |
76db6d95 | 531 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
532 | { |
533 | clp->cl_cons_state = state; | |
534 | wake_up_all(&nfs_client_active_wq); | |
535 | } | |
5006a76c | 536 | |
008f55d0 BH |
537 | /* |
538 | * With sessions, the client is not marked ready until after a | |
539 | * successful EXCHANGE_ID and CREATE_SESSION. | |
540 | * | |
541 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
542 | * other versions of NFS can be tried. | |
543 | */ | |
544 | int nfs4_check_client_ready(struct nfs_client *clp) | |
545 | { | |
546 | if (!nfs4_has_session(clp)) | |
547 | return 0; | |
548 | if (clp->cl_cons_state < NFS_CS_READY) | |
549 | return -EPROTONOSUPPORT; | |
550 | return 0; | |
551 | } | |
552 | ||
5006a76c DH |
553 | /* |
554 | * Initialise the timeout values for a connection | |
555 | */ | |
556 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
557 | unsigned int timeo, unsigned int retrans) | |
558 | { | |
559 | to->to_initval = timeo * HZ / 10; | |
560 | to->to_retries = retrans; | |
5006a76c DH |
561 | |
562 | switch (proto) { | |
0896a725 | 563 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 564 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
565 | if (to->to_retries == 0) |
566 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 567 | if (to->to_initval == 0) |
259875ef | 568 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
569 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
570 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
571 | to->to_increment = to->to_initval; | |
572 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
573 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
574 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
575 | if (to->to_maxval < to->to_initval) | |
576 | to->to_maxval = to->to_initval; | |
5006a76c DH |
577 | to->to_exponential = 0; |
578 | break; | |
0896a725 | 579 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
580 | if (to->to_retries == 0) |
581 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 582 | if (!to->to_initval) |
259875ef | 583 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
584 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
585 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
586 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
587 | to->to_exponential = 1; | |
588 | break; | |
259875ef TM |
589 | default: |
590 | BUG(); | |
5006a76c DH |
591 | } |
592 | } | |
593 | ||
594 | /* | |
595 | * Create an RPC client handle | |
596 | */ | |
59dca3b2 | 597 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
598 | const struct rpc_timeout *timeparms, |
599 | rpc_authflavor_t flavor, | |
4a01b8a4 | 600 | int discrtry, int noresvport) |
5006a76c | 601 | { |
5006a76c | 602 | struct rpc_clnt *clnt = NULL; |
41877d20 | 603 | struct rpc_create_args args = { |
59dca3b2 | 604 | .protocol = clp->cl_proto, |
41877d20 | 605 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 606 | .addrsize = clp->cl_addrlen, |
33170233 | 607 | .timeout = timeparms, |
41877d20 CL |
608 | .servername = clp->cl_hostname, |
609 | .program = &nfs_program, | |
610 | .version = clp->rpc_ops->version, | |
611 | .authflavor = flavor, | |
612 | }; | |
5006a76c | 613 | |
4a01b8a4 CL |
614 | if (discrtry) |
615 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
616 | if (noresvport) | |
617 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
618 | ||
5006a76c DH |
619 | if (!IS_ERR(clp->cl_rpcclient)) |
620 | return 0; | |
621 | ||
41877d20 | 622 | clnt = rpc_create(&args); |
5006a76c DH |
623 | if (IS_ERR(clnt)) { |
624 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 625 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
626 | return PTR_ERR(clnt); |
627 | } | |
628 | ||
5006a76c DH |
629 | clp->cl_rpcclient = clnt; |
630 | return 0; | |
631 | } | |
54ceac45 DH |
632 | |
633 | /* | |
634 | * Version 2 or 3 client destruction | |
635 | */ | |
636 | static void nfs_destroy_server(struct nfs_server *server) | |
637 | { | |
5eebde23 SJ |
638 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
639 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 640 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
641 | } |
642 | ||
643 | /* | |
644 | * Version 2 or 3 lockd setup | |
645 | */ | |
646 | static int nfs_start_lockd(struct nfs_server *server) | |
647 | { | |
9289e7f9 CL |
648 | struct nlm_host *host; |
649 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
650 | struct nlmclnt_initdata nlm_init = { |
651 | .hostname = clp->cl_hostname, | |
652 | .address = (struct sockaddr *)&clp->cl_addr, | |
653 | .addrlen = clp->cl_addrlen, | |
883bb163 | 654 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
655 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
656 | 1 : 0, | |
883bb163 | 657 | }; |
54ceac45 | 658 | |
883bb163 | 659 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 660 | return 0; |
5eebde23 SJ |
661 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
662 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
663 | return 0; |
664 | ||
8a6e5deb TM |
665 | switch (clp->cl_proto) { |
666 | default: | |
667 | nlm_init.protocol = IPPROTO_TCP; | |
668 | break; | |
669 | case XPRT_TRANSPORT_UDP: | |
670 | nlm_init.protocol = IPPROTO_UDP; | |
671 | } | |
672 | ||
883bb163 | 673 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
674 | if (IS_ERR(host)) |
675 | return PTR_ERR(host); | |
676 | ||
677 | server->nlm_host = host; | |
678 | server->destroy = nfs_destroy_server; | |
679 | return 0; | |
54ceac45 DH |
680 | } |
681 | ||
682 | /* | |
683 | * Initialise an NFSv3 ACL client connection | |
684 | */ | |
685 | #ifdef CONFIG_NFS_V3_ACL | |
686 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
687 | { | |
40c55319 | 688 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
689 | goto out_noacl; |
690 | if (server->flags & NFS_MOUNT_NOACL) | |
691 | goto out_noacl; | |
692 | ||
693 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
694 | if (IS_ERR(server->client_acl)) | |
695 | goto out_noacl; | |
696 | ||
697 | /* No errors! Assume that Sun nfsacls are supported */ | |
698 | server->caps |= NFS_CAP_ACLS; | |
699 | return; | |
700 | ||
701 | out_noacl: | |
702 | server->caps &= ~NFS_CAP_ACLS; | |
703 | } | |
704 | #else | |
705 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
706 | { | |
707 | server->flags &= ~NFS_MOUNT_NOACL; | |
708 | server->caps &= ~NFS_CAP_ACLS; | |
709 | } | |
710 | #endif | |
711 | ||
712 | /* | |
713 | * Create a general RPC client | |
714 | */ | |
33170233 TM |
715 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
716 | const struct rpc_timeout *timeo, | |
717 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
718 | { |
719 | struct nfs_client *clp = server->nfs_client; | |
720 | ||
721 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
722 | if (IS_ERR(server->client)) { | |
3110ff80 | 723 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
724 | return PTR_ERR(server->client); |
725 | } | |
726 | ||
33170233 TM |
727 | memcpy(&server->client->cl_timeout_default, |
728 | timeo, | |
729 | sizeof(server->client->cl_timeout_default)); | |
730 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
731 | ||
54ceac45 DH |
732 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
733 | struct rpc_auth *auth; | |
734 | ||
735 | auth = rpcauth_create(pseudoflavour, server->client); | |
736 | if (IS_ERR(auth)) { | |
3110ff80 | 737 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
738 | return PTR_ERR(auth); |
739 | } | |
740 | } | |
741 | server->client->cl_softrtry = 0; | |
742 | if (server->flags & NFS_MOUNT_SOFT) | |
743 | server->client->cl_softrtry = 1; | |
744 | ||
54ceac45 DH |
745 | return 0; |
746 | } | |
747 | ||
748 | /* | |
749 | * Initialise an NFS2 or NFS3 client | |
750 | */ | |
2283f8d6 | 751 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 752 | const struct rpc_timeout *timeparms, |
2283f8d6 | 753 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 754 | { |
54ceac45 DH |
755 | int error; |
756 | ||
757 | if (clp->cl_cons_state == NFS_CS_READY) { | |
758 | /* the client is already initialised */ | |
759 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
760 | return 0; | |
761 | } | |
762 | ||
54ceac45 DH |
763 | /* |
764 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
765 | * - RFC 2623, sec 2.3.2 | |
766 | */ | |
d740351b CL |
767 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
768 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
769 | if (error < 0) |
770 | goto error; | |
771 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
772 | return 0; | |
773 | ||
774 | error: | |
775 | nfs_mark_client_ready(clp, error); | |
776 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
777 | return error; | |
778 | } | |
779 | ||
780 | /* | |
781 | * Create a version 2 or 3 client | |
782 | */ | |
2283f8d6 TT |
783 | static int nfs_init_server(struct nfs_server *server, |
784 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 785 | { |
3a498026 TM |
786 | struct nfs_client_initdata cl_init = { |
787 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 788 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 789 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 790 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 791 | .proto = data->nfs_server.protocol, |
3a498026 | 792 | }; |
33170233 | 793 | struct rpc_timeout timeparms; |
54ceac45 | 794 | struct nfs_client *clp; |
3a498026 | 795 | int error; |
54ceac45 DH |
796 | |
797 | dprintk("--> nfs_init_server()\n"); | |
798 | ||
799 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 800 | if (data->version == 3) |
40c55319 | 801 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
802 | #endif |
803 | ||
804 | /* Allocate or find a client reference we can use */ | |
3a498026 | 805 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
806 | if (IS_ERR(clp)) { |
807 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
808 | return PTR_ERR(clp); | |
809 | } | |
810 | ||
33170233 TM |
811 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
812 | data->timeo, data->retrans); | |
813 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
814 | if (error < 0) |
815 | goto error; | |
816 | ||
817 | server->nfs_client = clp; | |
818 | ||
819 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 820 | server->flags = data->flags; |
b797cac7 | 821 | server->options = data->options; |
62ab460c TM |
822 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
823 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
824 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
825 | |
826 | if (data->rsize) | |
827 | server->rsize = nfs_block_size(data->rsize, NULL); | |
828 | if (data->wsize) | |
829 | server->wsize = nfs_block_size(data->wsize, NULL); | |
830 | ||
831 | server->acregmin = data->acregmin * HZ; | |
832 | server->acregmax = data->acregmax * HZ; | |
833 | server->acdirmin = data->acdirmin * HZ; | |
834 | server->acdirmax = data->acdirmax * HZ; | |
835 | ||
836 | /* Start lockd here, before we might error out */ | |
837 | error = nfs_start_lockd(server); | |
838 | if (error < 0) | |
839 | goto error; | |
840 | ||
f22d6d79 CL |
841 | server->port = data->nfs_server.port; |
842 | ||
33170233 | 843 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
844 | if (error < 0) |
845 | goto error; | |
846 | ||
3f8400d1 CL |
847 | /* Preserve the values of mount_server-related mount options */ |
848 | if (data->mount_server.addrlen) { | |
849 | memcpy(&server->mountd_address, &data->mount_server.address, | |
850 | data->mount_server.addrlen); | |
851 | server->mountd_addrlen = data->mount_server.addrlen; | |
852 | } | |
853 | server->mountd_version = data->mount_server.version; | |
854 | server->mountd_port = data->mount_server.port; | |
855 | server->mountd_protocol = data->mount_server.protocol; | |
856 | ||
54ceac45 DH |
857 | server->namelen = data->namlen; |
858 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
859 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
860 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
861 | return 0; | |
862 | ||
863 | error: | |
864 | server->nfs_client = NULL; | |
865 | nfs_put_client(clp); | |
866 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
867 | return error; | |
868 | } | |
869 | ||
870 | /* | |
871 | * Load up the server record from information gained in an fsinfo record | |
872 | */ | |
873 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
874 | { | |
875 | unsigned long max_rpc_payload; | |
876 | ||
877 | /* Work out a lot of parameters */ | |
878 | if (server->rsize == 0) | |
879 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
880 | if (server->wsize == 0) | |
881 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
882 | ||
883 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
884 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
885 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
886 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
887 | ||
888 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
889 | if (server->rsize > max_rpc_payload) | |
890 | server->rsize = max_rpc_payload; | |
891 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
892 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
893 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 894 | |
d993831f | 895 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
896 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
897 | ||
898 | if (server->wsize > max_rpc_payload) | |
899 | server->wsize = max_rpc_payload; | |
900 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
901 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
902 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
903 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); | |
904 | ||
905 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
906 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
907 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
908 | if (server->dtsize > server->rsize) |
909 | server->dtsize = server->rsize; | |
910 | ||
911 | if (server->flags & NFS_MOUNT_NOAC) { | |
912 | server->acregmin = server->acregmax = 0; | |
913 | server->acdirmin = server->acdirmax = 0; | |
914 | } | |
915 | ||
916 | server->maxfilesize = fsinfo->maxfilesize; | |
917 | ||
918 | /* We're airborne Set socket buffersize */ | |
919 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
920 | } | |
921 | ||
922 | /* | |
923 | * Probe filesystem information, including the FSID on v2/v3 | |
924 | */ | |
925 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
926 | { | |
927 | struct nfs_fsinfo fsinfo; | |
928 | struct nfs_client *clp = server->nfs_client; | |
929 | int error; | |
930 | ||
931 | dprintk("--> nfs_probe_fsinfo()\n"); | |
932 | ||
933 | if (clp->rpc_ops->set_capabilities != NULL) { | |
934 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
935 | if (error < 0) | |
936 | goto out_error; | |
937 | } | |
938 | ||
939 | fsinfo.fattr = fattr; | |
54ceac45 DH |
940 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
941 | if (error < 0) | |
942 | goto out_error; | |
943 | ||
944 | nfs_server_set_fsinfo(server, &fsinfo); | |
945 | ||
946 | /* Get some general file system info */ | |
947 | if (server->namelen == 0) { | |
948 | struct nfs_pathconf pathinfo; | |
949 | ||
950 | pathinfo.fattr = fattr; | |
951 | nfs_fattr_init(fattr); | |
952 | ||
953 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
954 | server->namelen = pathinfo.max_namelen; | |
955 | } | |
956 | ||
957 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
958 | return 0; | |
959 | ||
960 | out_error: | |
961 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
962 | return error; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Copy useful information when duplicating a server record | |
967 | */ | |
968 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
969 | { | |
970 | target->flags = source->flags; | |
356e76b8 CL |
971 | target->rsize = source->rsize; |
972 | target->wsize = source->wsize; | |
54ceac45 DH |
973 | target->acregmin = source->acregmin; |
974 | target->acregmax = source->acregmax; | |
975 | target->acdirmin = source->acdirmin; | |
976 | target->acdirmax = source->acdirmax; | |
977 | target->caps = source->caps; | |
2df54806 | 978 | target->options = source->options; |
54ceac45 DH |
979 | } |
980 | ||
981 | /* | |
982 | * Allocate and initialise a server record | |
983 | */ | |
984 | static struct nfs_server *nfs_alloc_server(void) | |
985 | { | |
986 | struct nfs_server *server; | |
987 | ||
988 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
989 | if (!server) | |
990 | return NULL; | |
991 | ||
992 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
993 | ||
994 | /* Zero out the NFS state stuff */ | |
995 | INIT_LIST_HEAD(&server->client_link); | |
996 | INIT_LIST_HEAD(&server->master_link); | |
997 | ||
ef818a28 SD |
998 | atomic_set(&server->active, 0); |
999 | ||
54ceac45 DH |
1000 | server->io_stats = nfs_alloc_iostats(); |
1001 | if (!server->io_stats) { | |
1002 | kfree(server); | |
1003 | return NULL; | |
1004 | } | |
1005 | ||
48d07649 JA |
1006 | if (bdi_init(&server->backing_dev_info)) { |
1007 | nfs_free_iostats(server->io_stats); | |
1008 | kfree(server); | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
54ceac45 DH |
1012 | return server; |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * Free up a server record | |
1017 | */ | |
1018 | void nfs_free_server(struct nfs_server *server) | |
1019 | { | |
1020 | dprintk("--> nfs_free_server()\n"); | |
1021 | ||
1022 | spin_lock(&nfs_client_lock); | |
1023 | list_del(&server->client_link); | |
1024 | list_del(&server->master_link); | |
1025 | spin_unlock(&nfs_client_lock); | |
1026 | ||
1027 | if (server->destroy != NULL) | |
1028 | server->destroy(server); | |
5cef338b TM |
1029 | |
1030 | if (!IS_ERR(server->client_acl)) | |
1031 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1032 | if (!IS_ERR(server->client)) |
1033 | rpc_shutdown_client(server->client); | |
1034 | ||
1035 | nfs_put_client(server->nfs_client); | |
1036 | ||
1037 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 1038 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1039 | kfree(server); |
1040 | nfs_release_automount_timer(); | |
1041 | dprintk("<-- nfs_free_server()\n"); | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Create a version 2 or 3 volume record | |
1046 | * - keyed on server and FSID | |
1047 | */ | |
2283f8d6 | 1048 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1049 | struct nfs_fh *mntfh) |
1050 | { | |
1051 | struct nfs_server *server; | |
fbca779a | 1052 | struct nfs_fattr *fattr; |
54ceac45 DH |
1053 | int error; |
1054 | ||
1055 | server = nfs_alloc_server(); | |
1056 | if (!server) | |
1057 | return ERR_PTR(-ENOMEM); | |
1058 | ||
fbca779a TM |
1059 | error = -ENOMEM; |
1060 | fattr = nfs_alloc_fattr(); | |
1061 | if (fattr == NULL) | |
1062 | goto error; | |
1063 | ||
54ceac45 DH |
1064 | /* Get a client representation */ |
1065 | error = nfs_init_server(server, data); | |
1066 | if (error < 0) | |
1067 | goto error; | |
1068 | ||
1069 | BUG_ON(!server->nfs_client); | |
1070 | BUG_ON(!server->nfs_client->rpc_ops); | |
1071 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1072 | ||
1073 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1074 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1075 | if (error < 0) |
1076 | goto error; | |
54af3bb5 TM |
1077 | if (server->nfs_client->rpc_ops->version == 3) { |
1078 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1079 | server->namelen = NFS3_MAXNAMLEN; | |
1080 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1081 | server->caps |= NFS_CAP_READDIRPLUS; | |
1082 | } else { | |
1083 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1084 | server->namelen = NFS2_MAXNAMLEN; | |
1085 | } | |
1086 | ||
fbca779a TM |
1087 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1088 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1089 | if (error < 0) { |
1090 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1091 | goto error; | |
1092 | } | |
1093 | } | |
fbca779a | 1094 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1095 | |
6daabf1b DH |
1096 | dprintk("Server FSID: %llx:%llx\n", |
1097 | (unsigned long long) server->fsid.major, | |
1098 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1099 | |
54ceac45 DH |
1100 | spin_lock(&nfs_client_lock); |
1101 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1102 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1103 | spin_unlock(&nfs_client_lock); | |
1104 | ||
1105 | server->mount_time = jiffies; | |
fbca779a | 1106 | nfs_free_fattr(fattr); |
54ceac45 DH |
1107 | return server; |
1108 | ||
1109 | error: | |
fbca779a | 1110 | nfs_free_fattr(fattr); |
54ceac45 DH |
1111 | nfs_free_server(server); |
1112 | return ERR_PTR(error); | |
1113 | } | |
1114 | ||
1115 | #ifdef CONFIG_NFS_V4 | |
9bdaa86d BH |
1116 | /* |
1117 | * Initialize the NFS4 callback service | |
1118 | */ | |
1119 | static int nfs4_init_callback(struct nfs_client *clp) | |
1120 | { | |
1121 | int error; | |
1122 | ||
1123 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1124 | if (nfs4_has_session(clp)) { |
1125 | error = xprt_setup_backchannel( | |
1126 | clp->cl_rpcclient->cl_xprt, | |
1127 | NFS41_BC_MIN_CALLBACKS); | |
1128 | if (error < 0) | |
1129 | return error; | |
1130 | } | |
1131 | ||
97dc1359 | 1132 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1133 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1134 | if (error < 0) { |
1135 | dprintk("%s: failed to start callback. Error = %d\n", | |
1136 | __func__, error); | |
1137 | return error; | |
1138 | } | |
1139 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1140 | } | |
1141 | return 0; | |
1142 | } | |
1143 | ||
557134a3 AA |
1144 | /* |
1145 | * Initialize the minor version specific parts of an NFS4 client record | |
1146 | */ | |
1147 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1148 | { | |
1149 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1150 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1151 | struct nfs4_session *session = NULL; |
1152 | /* | |
1153 | * Create the session and mark it expired. | |
1154 | * When a SEQUENCE operation encounters the expired session | |
1155 | * it will do session recovery to initialize it. | |
1156 | */ | |
1157 | session = nfs4_alloc_session(clp); | |
1158 | if (!session) | |
1159 | return -ENOMEM; | |
1160 | ||
1161 | clp->cl_session = session; | |
fe74ba3a TM |
1162 | /* |
1163 | * The create session reply races with the server back | |
1164 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1165 | * so that the client back channel can find the | |
1166 | * nfs_client struct | |
1167 | */ | |
1168 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1169 | } |
1170 | #endif /* CONFIG_NFS_V4_1 */ | |
1171 | ||
71468513 | 1172 | return nfs4_init_callback(clp); |
557134a3 AA |
1173 | } |
1174 | ||
54ceac45 DH |
1175 | /* |
1176 | * Initialise an NFS4 client record | |
1177 | */ | |
1178 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 1179 | const struct rpc_timeout *timeparms, |
7d9ac06f | 1180 | const char *ip_addr, |
d740351b CL |
1181 | rpc_authflavor_t authflavour, |
1182 | int flags) | |
54ceac45 DH |
1183 | { |
1184 | int error; | |
1185 | ||
1186 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1187 | /* the client is initialised already */ | |
1188 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1193 | clp->rpc_ops = &nfs_v4_clientops; | |
1194 | ||
59dca3b2 | 1195 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1196 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1197 | if (error < 0) |
1198 | goto error; | |
f4373bf9 | 1199 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1200 | |
1201 | error = nfs_idmap_new(clp); | |
1202 | if (error < 0) { | |
1203 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1204 | __func__, error); |
54ceac45 DH |
1205 | goto error; |
1206 | } | |
9c5bf38d | 1207 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1208 | |
557134a3 AA |
1209 | error = nfs4_init_client_minor_version(clp); |
1210 | if (error < 0) | |
1211 | goto error; | |
1212 | ||
76db6d95 AA |
1213 | if (!nfs4_has_session(clp)) |
1214 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1215 | return 0; |
1216 | ||
1217 | error: | |
1218 | nfs_mark_client_ready(clp, error); | |
1219 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1220 | return error; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Set up an NFS4 client | |
1225 | */ | |
1226 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1227 | const char *hostname, |
1228 | const struct sockaddr *addr, | |
1229 | const size_t addrlen, | |
7d9ac06f | 1230 | const char *ip_addr, |
54ceac45 | 1231 | rpc_authflavor_t authflavour, |
94a417f3 BH |
1232 | int proto, const struct rpc_timeout *timeparms, |
1233 | u32 minorversion) | |
54ceac45 | 1234 | { |
3a498026 TM |
1235 | struct nfs_client_initdata cl_init = { |
1236 | .hostname = hostname, | |
dcecae0f CL |
1237 | .addr = addr, |
1238 | .addrlen = addrlen, | |
40c55319 | 1239 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1240 | .proto = proto, |
5aae4a9a | 1241 | .minorversion = minorversion, |
3a498026 | 1242 | }; |
54ceac45 DH |
1243 | struct nfs_client *clp; |
1244 | int error; | |
1245 | ||
1246 | dprintk("--> nfs4_set_client()\n"); | |
1247 | ||
1248 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1249 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1250 | if (IS_ERR(clp)) { |
1251 | error = PTR_ERR(clp); | |
1252 | goto error; | |
1253 | } | |
d740351b CL |
1254 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1255 | server->flags); | |
54ceac45 DH |
1256 | if (error < 0) |
1257 | goto error_put; | |
1258 | ||
1259 | server->nfs_client = clp; | |
1260 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1261 | return 0; | |
1262 | ||
1263 | error_put: | |
1264 | nfs_put_client(clp); | |
1265 | error: | |
1266 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1267 | return error; | |
1268 | } | |
1269 | ||
557134a3 | 1270 | |
96b09e02 AA |
1271 | /* |
1272 | * Session has been established, and the client marked ready. | |
1273 | * Set the mount rsize and wsize with negotiated fore channel | |
1274 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1275 | */ | |
1276 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1277 | { | |
1278 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1279 | struct nfs4_session *sess; |
1280 | u32 server_resp_sz; | |
1281 | u32 server_rqst_sz; | |
1282 | ||
96b09e02 AA |
1283 | if (!nfs4_has_session(server->nfs_client)) |
1284 | return; | |
2449ea2e AB |
1285 | sess = server->nfs_client->cl_session; |
1286 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1287 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1288 | ||
1289 | if (server->rsize > server_resp_sz) | |
1290 | server->rsize = server_resp_sz; | |
1291 | if (server->wsize > server_rqst_sz) | |
1292 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1293 | #endif /* CONFIG_NFS_V4_1 */ |
1294 | } | |
1295 | ||
44950b67 TM |
1296 | static int nfs4_server_common_setup(struct nfs_server *server, |
1297 | struct nfs_fh *mntfh) | |
1298 | { | |
1299 | struct nfs_fattr *fattr; | |
1300 | int error; | |
1301 | ||
1302 | BUG_ON(!server->nfs_client); | |
1303 | BUG_ON(!server->nfs_client->rpc_ops); | |
1304 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1305 | ||
1306 | fattr = nfs_alloc_fattr(); | |
1307 | if (fattr == NULL) | |
1308 | return -ENOMEM; | |
1309 | ||
1310 | /* We must ensure the session is initialised first */ | |
1311 | error = nfs4_init_session(server); | |
1312 | if (error < 0) | |
1313 | goto out; | |
1314 | ||
1315 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1316 | error = nfs4_get_rootfh(server, mntfh); | |
1317 | if (error < 0) | |
1318 | goto out; | |
1319 | ||
1320 | dprintk("Server FSID: %llx:%llx\n", | |
1321 | (unsigned long long) server->fsid.major, | |
1322 | (unsigned long long) server->fsid.minor); | |
1323 | dprintk("Mount FH: %d\n", mntfh->size); | |
1324 | ||
1325 | nfs4_session_set_rwsize(server); | |
1326 | ||
1327 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1328 | if (error < 0) | |
1329 | goto out; | |
1330 | ||
1331 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1332 | server->namelen = NFS4_MAXNAMLEN; | |
1333 | ||
1334 | spin_lock(&nfs_client_lock); | |
1335 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1336 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1337 | spin_unlock(&nfs_client_lock); | |
1338 | ||
1339 | server->mount_time = jiffies; | |
1340 | out: | |
1341 | nfs_free_fattr(fattr); | |
1342 | return error; | |
1343 | } | |
1344 | ||
54ceac45 DH |
1345 | /* |
1346 | * Create a version 4 volume record | |
1347 | */ | |
1348 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1349 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1350 | { |
33170233 | 1351 | struct rpc_timeout timeparms; |
54ceac45 DH |
1352 | int error; |
1353 | ||
1354 | dprintk("--> nfs4_init_server()\n"); | |
1355 | ||
33170233 TM |
1356 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1357 | data->timeo, data->retrans); | |
1358 | ||
542fcc33 CL |
1359 | /* Initialise the client representation from the mount data */ |
1360 | server->flags = data->flags; | |
82f2e547 BS |
1361 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1362 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1363 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1364 | server->options = data->options; |
542fcc33 | 1365 | |
33170233 TM |
1366 | /* Get a client record */ |
1367 | error = nfs4_set_client(server, | |
1368 | data->nfs_server.hostname, | |
1369 | (const struct sockaddr *)&data->nfs_server.address, | |
1370 | data->nfs_server.addrlen, | |
1371 | data->client_address, | |
1372 | data->auth_flavors[0], | |
1373 | data->nfs_server.protocol, | |
94a417f3 BH |
1374 | &timeparms, |
1375 | data->minorversion); | |
33170233 TM |
1376 | if (error < 0) |
1377 | goto error; | |
1378 | ||
54ceac45 DH |
1379 | if (data->rsize) |
1380 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1381 | if (data->wsize) | |
1382 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1383 | ||
1384 | server->acregmin = data->acregmin * HZ; | |
1385 | server->acregmax = data->acregmax * HZ; | |
1386 | server->acdirmin = data->acdirmin * HZ; | |
1387 | server->acdirmax = data->acdirmax * HZ; | |
1388 | ||
f22d6d79 CL |
1389 | server->port = data->nfs_server.port; |
1390 | ||
33170233 | 1391 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1392 | |
33170233 | 1393 | error: |
54ceac45 DH |
1394 | /* Done */ |
1395 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1396 | return error; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Create a version 4 volume record | |
1401 | * - keyed on server and FSID | |
1402 | */ | |
91ea40b9 | 1403 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1404 | struct nfs_fh *mntfh) |
1405 | { | |
54ceac45 DH |
1406 | struct nfs_server *server; |
1407 | int error; | |
1408 | ||
1409 | dprintk("--> nfs4_create_server()\n"); | |
1410 | ||
1411 | server = nfs_alloc_server(); | |
1412 | if (!server) | |
1413 | return ERR_PTR(-ENOMEM); | |
1414 | ||
54ceac45 | 1415 | /* set up the general RPC client */ |
91ea40b9 | 1416 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1417 | if (error < 0) |
1418 | goto error; | |
1419 | ||
44950b67 | 1420 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1421 | if (error < 0) |
1422 | goto error; | |
1423 | ||
54ceac45 DH |
1424 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1425 | return server; | |
1426 | ||
1427 | error: | |
1428 | nfs_free_server(server); | |
1429 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1430 | return ERR_PTR(error); | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Create an NFS4 referral server record | |
1435 | */ | |
1436 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1437 | struct nfs_fh *mntfh) |
54ceac45 DH |
1438 | { |
1439 | struct nfs_client *parent_client; | |
1440 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1441 | int error; |
1442 | ||
1443 | dprintk("--> nfs4_create_referral_server()\n"); | |
1444 | ||
1445 | server = nfs_alloc_server(); | |
1446 | if (!server) | |
1447 | return ERR_PTR(-ENOMEM); | |
1448 | ||
1449 | parent_server = NFS_SB(data->sb); | |
1450 | parent_client = parent_server->nfs_client; | |
1451 | ||
542fcc33 CL |
1452 | /* Initialise the client representation from the parent server */ |
1453 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1454 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1455 | |
54ceac45 DH |
1456 | /* Get a client representation. |
1457 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1458 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1459 | data->addr, |
1460 | data->addrlen, | |
dcecae0f CL |
1461 | parent_client->cl_ipaddr, |
1462 | data->authflavor, | |
1463 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1464 | parent_server->client->cl_timeout, |
97dc1359 | 1465 | parent_client->cl_mvops->minor_version); |
297de4f6 AA |
1466 | if (error < 0) |
1467 | goto error; | |
54ceac45 | 1468 | |
33170233 | 1469 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1470 | if (error < 0) |
1471 | goto error; | |
1472 | ||
44950b67 | 1473 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1474 | if (error < 0) |
1475 | goto error; | |
1476 | ||
54ceac45 DH |
1477 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1478 | return server; | |
1479 | ||
1480 | error: | |
1481 | nfs_free_server(server); | |
1482 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1483 | return ERR_PTR(error); | |
1484 | } | |
1485 | ||
1486 | #endif /* CONFIG_NFS_V4 */ | |
1487 | ||
1488 | /* | |
1489 | * Clone an NFS2, NFS3 or NFS4 server record | |
1490 | */ | |
1491 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1492 | struct nfs_fh *fh, | |
1493 | struct nfs_fattr *fattr) | |
1494 | { | |
1495 | struct nfs_server *server; | |
fbca779a | 1496 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1497 | int error; |
1498 | ||
1499 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1500 | (unsigned long long) fattr->fsid.major, |
1501 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1502 | |
1503 | server = nfs_alloc_server(); | |
1504 | if (!server) | |
1505 | return ERR_PTR(-ENOMEM); | |
1506 | ||
fbca779a TM |
1507 | error = -ENOMEM; |
1508 | fattr_fsinfo = nfs_alloc_fattr(); | |
1509 | if (fattr_fsinfo == NULL) | |
1510 | goto out_free_server; | |
1511 | ||
54ceac45 DH |
1512 | /* Copy data from the source */ |
1513 | server->nfs_client = source->nfs_client; | |
1514 | atomic_inc(&server->nfs_client->cl_count); | |
1515 | nfs_server_copy_userdata(server, source); | |
1516 | ||
1517 | server->fsid = fattr->fsid; | |
1518 | ||
33170233 TM |
1519 | error = nfs_init_server_rpcclient(server, |
1520 | source->client->cl_timeout, | |
1521 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1522 | if (error < 0) |
1523 | goto out_free_server; | |
1524 | if (!IS_ERR(source->client_acl)) | |
1525 | nfs_init_server_aclclient(server); | |
1526 | ||
1527 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1528 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1529 | if (error < 0) |
1530 | goto out_free_server; | |
1531 | ||
54af3bb5 TM |
1532 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1533 | server->namelen = NFS4_MAXNAMLEN; | |
1534 | ||
54ceac45 | 1535 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1536 | (unsigned long long) server->fsid.major, |
1537 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1538 | |
1539 | error = nfs_start_lockd(server); | |
1540 | if (error < 0) | |
1541 | goto out_free_server; | |
1542 | ||
1543 | spin_lock(&nfs_client_lock); | |
1544 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1545 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1546 | spin_unlock(&nfs_client_lock); | |
1547 | ||
1548 | server->mount_time = jiffies; | |
1549 | ||
fbca779a | 1550 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1551 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1552 | return server; | |
1553 | ||
1554 | out_free_server: | |
fbca779a | 1555 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1556 | nfs_free_server(server); |
1557 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1558 | return ERR_PTR(error); | |
1559 | } | |
6aaca566 DH |
1560 | |
1561 | #ifdef CONFIG_PROC_FS | |
1562 | static struct proc_dir_entry *proc_fs_nfs; | |
1563 | ||
1564 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1565 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1566 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1567 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1568 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1569 | ||
88e9d34c | 1570 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1571 | .start = nfs_server_list_start, |
1572 | .next = nfs_server_list_next, | |
1573 | .stop = nfs_server_list_stop, | |
1574 | .show = nfs_server_list_show, | |
1575 | }; | |
1576 | ||
00977a59 | 1577 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1578 | .open = nfs_server_list_open, |
1579 | .read = seq_read, | |
1580 | .llseek = seq_lseek, | |
1581 | .release = seq_release, | |
34b37235 | 1582 | .owner = THIS_MODULE, |
6aaca566 DH |
1583 | }; |
1584 | ||
1585 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1586 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1587 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1588 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1589 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1590 | ||
88e9d34c | 1591 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1592 | .start = nfs_volume_list_start, |
1593 | .next = nfs_volume_list_next, | |
1594 | .stop = nfs_volume_list_stop, | |
1595 | .show = nfs_volume_list_show, | |
1596 | }; | |
1597 | ||
00977a59 | 1598 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1599 | .open = nfs_volume_list_open, |
1600 | .read = seq_read, | |
1601 | .llseek = seq_lseek, | |
1602 | .release = seq_release, | |
34b37235 | 1603 | .owner = THIS_MODULE, |
6aaca566 DH |
1604 | }; |
1605 | ||
1606 | /* | |
1607 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1608 | * we're dealing | |
1609 | */ | |
1610 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1611 | { | |
1612 | struct seq_file *m; | |
1613 | int ret; | |
1614 | ||
1615 | ret = seq_open(file, &nfs_server_list_ops); | |
1616 | if (ret < 0) | |
1617 | return ret; | |
1618 | ||
1619 | m = file->private_data; | |
1620 | m->private = PDE(inode)->data; | |
1621 | ||
1622 | return 0; | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * set up the iterator to start reading from the server list and return the first item | |
1627 | */ | |
1628 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1629 | { | |
6aaca566 DH |
1630 | /* lock the list against modification */ |
1631 | spin_lock(&nfs_client_lock); | |
259902ea | 1632 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1633 | } |
1634 | ||
1635 | /* | |
1636 | * move to next server | |
1637 | */ | |
1638 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1639 | { | |
259902ea | 1640 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1641 | } |
1642 | ||
1643 | /* | |
1644 | * clean up after reading from the transports list | |
1645 | */ | |
1646 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1647 | { | |
1648 | spin_unlock(&nfs_client_lock); | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * display a header line followed by a load of call lines | |
1653 | */ | |
1654 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1655 | { | |
1656 | struct nfs_client *clp; | |
1657 | ||
1658 | /* display header on line 1 */ | |
259902ea | 1659 | if (v == &nfs_client_list) { |
6aaca566 DH |
1660 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | /* display one transport per line on subsequent lines */ | |
1665 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1666 | ||
5d8515ca | 1667 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1668 | clp->rpc_ops->version, |
5d8515ca CL |
1669 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1670 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1671 | atomic_read(&clp->cl_count), |
1672 | clp->cl_hostname); | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | /* | |
1678 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1679 | */ | |
1680 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1681 | { | |
1682 | struct seq_file *m; | |
1683 | int ret; | |
1684 | ||
1685 | ret = seq_open(file, &nfs_volume_list_ops); | |
1686 | if (ret < 0) | |
1687 | return ret; | |
1688 | ||
1689 | m = file->private_data; | |
1690 | m->private = PDE(inode)->data; | |
1691 | ||
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * set up the iterator to start reading from the volume list and return the first item | |
1697 | */ | |
1698 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1699 | { | |
6aaca566 DH |
1700 | /* lock the list against modification */ |
1701 | spin_lock(&nfs_client_lock); | |
259902ea | 1702 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1703 | } |
1704 | ||
1705 | /* | |
1706 | * move to next volume | |
1707 | */ | |
1708 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1709 | { | |
259902ea | 1710 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1711 | } |
1712 | ||
1713 | /* | |
1714 | * clean up after reading from the transports list | |
1715 | */ | |
1716 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1717 | { | |
1718 | spin_unlock(&nfs_client_lock); | |
1719 | } | |
1720 | ||
1721 | /* | |
1722 | * display a header line followed by a load of call lines | |
1723 | */ | |
1724 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1725 | { | |
1726 | struct nfs_server *server; | |
1727 | struct nfs_client *clp; | |
1728 | char dev[8], fsid[17]; | |
1729 | ||
1730 | /* display header on line 1 */ | |
259902ea | 1731 | if (v == &nfs_volume_list) { |
5d1acff1 | 1732 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1733 | return 0; |
1734 | } | |
1735 | /* display one transport per line on subsequent lines */ | |
1736 | server = list_entry(v, struct nfs_server, master_link); | |
1737 | clp = server->nfs_client; | |
1738 | ||
1739 | snprintf(dev, 8, "%u:%u", | |
1740 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1741 | ||
1742 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1743 | (unsigned long long) server->fsid.major, |
1744 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1745 | |
5d1acff1 | 1746 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1747 | clp->rpc_ops->version, |
5d8515ca CL |
1748 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1749 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1750 | dev, |
5d1acff1 DH |
1751 | fsid, |
1752 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1753 | |
1754 | return 0; | |
1755 | } | |
1756 | ||
1757 | /* | |
1758 | * initialise the /proc/fs/nfsfs/ directory | |
1759 | */ | |
1760 | int __init nfs_fs_proc_init(void) | |
1761 | { | |
1762 | struct proc_dir_entry *p; | |
1763 | ||
36a5aeb8 | 1764 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1765 | if (!proc_fs_nfs) |
1766 | goto error_0; | |
1767 | ||
6aaca566 | 1768 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1769 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1770 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1771 | if (!p) |
1772 | goto error_1; | |
1773 | ||
6aaca566 | 1774 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1775 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1776 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1777 | if (!p) |
1778 | goto error_2; | |
6aaca566 DH |
1779 | return 0; |
1780 | ||
1781 | error_2: | |
1782 | remove_proc_entry("servers", proc_fs_nfs); | |
1783 | error_1: | |
36a5aeb8 | 1784 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1785 | error_0: |
1786 | return -ENOMEM; | |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * clean up the /proc/fs/nfsfs/ directory | |
1791 | */ | |
1792 | void nfs_fs_proc_exit(void) | |
1793 | { | |
1794 | remove_proc_entry("volumes", proc_fs_nfs); | |
1795 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1796 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1797 | } |
1798 | ||
1799 | #endif /* CONFIG_PROC_FS */ |