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Commit | Line | Data |
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24c8dbbb DH |
1 | /* client.c: NFS client sharing and management code |
2 | * | |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
24c8dbbb DH |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
e8edc6e0 | 15 | #include <linux/sched.h> |
24c8dbbb DH |
16 | #include <linux/time.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/sunrpc/clnt.h> | |
24 | #include <linux/sunrpc/stats.h> | |
25 | #include <linux/sunrpc/metrics.h> | |
0896a725 | 26 | #include <linux/sunrpc/xprtsock.h> |
2cf7ff7a | 27 | #include <linux/sunrpc/xprtrdma.h> |
24c8dbbb DH |
28 | #include <linux/nfs_fs.h> |
29 | #include <linux/nfs_mount.h> | |
30 | #include <linux/nfs4_mount.h> | |
31 | #include <linux/lockd/bind.h> | |
24c8dbbb DH |
32 | #include <linux/seq_file.h> |
33 | #include <linux/mount.h> | |
34 | #include <linux/nfs_idmap.h> | |
35 | #include <linux/vfs.h> | |
36 | #include <linux/inet.h> | |
3b0d3f93 | 37 | #include <linux/in6.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3b0d3f93 | 39 | #include <net/ipv6.h> |
24c8dbbb | 40 | #include <linux/nfs_xdr.h> |
0b5b7ae0 | 41 | #include <linux/sunrpc/bc_xprt.h> |
24c8dbbb DH |
42 | |
43 | #include <asm/system.h> | |
44 | ||
45 | #include "nfs4_fs.h" | |
46 | #include "callback.h" | |
47 | #include "delegation.h" | |
48 | #include "iostat.h" | |
49 | #include "internal.h" | |
14727281 | 50 | #include "fscache.h" |
85e174ba | 51 | #include "pnfs.h" |
24c8dbbb DH |
52 | |
53 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
54 | ||
55 | static DEFINE_SPINLOCK(nfs_client_lock); | |
56 | static LIST_HEAD(nfs_client_list); | |
54ceac45 | 57 | static LIST_HEAD(nfs_volume_list); |
24c8dbbb | 58 | static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); |
f4eecd5d AA |
59 | #ifdef CONFIG_NFS_V4 |
60 | static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */ | |
61 | ||
62 | /* | |
63 | * Get a unique NFSv4.0 callback identifier which will be used | |
64 | * by the V4.0 callback service to lookup the nfs_client struct | |
65 | */ | |
66 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
67 | { | |
68 | int ret = 0; | |
69 | ||
70 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
71 | return ret; | |
72 | retry: | |
73 | if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL)) | |
74 | return -ENOMEM; | |
75 | spin_lock(&nfs_client_lock); | |
76 | ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident); | |
77 | spin_unlock(&nfs_client_lock); | |
78 | if (ret == -EAGAIN) | |
79 | goto retry; | |
80 | return ret; | |
81 | } | |
82 | #endif /* CONFIG_NFS_V4 */ | |
24c8dbbb | 83 | |
5006a76c DH |
84 | /* |
85 | * RPC cruft for NFS | |
86 | */ | |
87 | static struct rpc_version *nfs_version[5] = { | |
88 | [2] = &nfs_version2, | |
89 | #ifdef CONFIG_NFS_V3 | |
90 | [3] = &nfs_version3, | |
91 | #endif | |
92 | #ifdef CONFIG_NFS_V4 | |
93 | [4] = &nfs_version4, | |
94 | #endif | |
95 | }; | |
96 | ||
97 | struct rpc_program nfs_program = { | |
98 | .name = "nfs", | |
99 | .number = NFS_PROGRAM, | |
100 | .nrvers = ARRAY_SIZE(nfs_version), | |
101 | .version = nfs_version, | |
102 | .stats = &nfs_rpcstat, | |
103 | .pipe_dir_name = "/nfs", | |
104 | }; | |
105 | ||
106 | struct rpc_stat nfs_rpcstat = { | |
107 | .program = &nfs_program | |
108 | }; | |
109 | ||
110 | ||
111 | #ifdef CONFIG_NFS_V3_ACL | |
112 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
113 | static struct rpc_version * nfsacl_version[] = { | |
114 | [3] = &nfsacl_version3, | |
115 | }; | |
116 | ||
117 | struct rpc_program nfsacl_program = { | |
118 | .name = "nfsacl", | |
119 | .number = NFS_ACL_PROGRAM, | |
120 | .nrvers = ARRAY_SIZE(nfsacl_version), | |
121 | .version = nfsacl_version, | |
122 | .stats = &nfsacl_rpcstat, | |
123 | }; | |
124 | #endif /* CONFIG_NFS_V3_ACL */ | |
125 | ||
3a498026 TM |
126 | struct nfs_client_initdata { |
127 | const char *hostname; | |
d7422c47 | 128 | const struct sockaddr *addr; |
6e4cffd7 | 129 | size_t addrlen; |
40c55319 | 130 | const struct nfs_rpc_ops *rpc_ops; |
59dca3b2 | 131 | int proto; |
5aae4a9a | 132 | u32 minorversion; |
3a498026 TM |
133 | }; |
134 | ||
24c8dbbb DH |
135 | /* |
136 | * Allocate a shared client record | |
137 | * | |
138 | * Since these are allocated/deallocated very rarely, we don't | |
139 | * bother putting them in a slab cache... | |
140 | */ | |
3a498026 | 141 | static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
142 | { |
143 | struct nfs_client *clp; | |
7c67db3a | 144 | struct rpc_cred *cred; |
a21bdd9b | 145 | int err = -ENOMEM; |
24c8dbbb DH |
146 | |
147 | if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) | |
148 | goto error_0; | |
149 | ||
40c55319 TM |
150 | clp->rpc_ops = cl_init->rpc_ops; |
151 | ||
24c8dbbb DH |
152 | atomic_set(&clp->cl_count, 1); |
153 | clp->cl_cons_state = NFS_CS_INITING; | |
154 | ||
6e4cffd7 CL |
155 | memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen); |
156 | clp->cl_addrlen = cl_init->addrlen; | |
24c8dbbb | 157 | |
3a498026 | 158 | if (cl_init->hostname) { |
a21bdd9b | 159 | err = -ENOMEM; |
3a498026 | 160 | clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL); |
24c8dbbb | 161 | if (!clp->cl_hostname) |
71468513 | 162 | goto error_cleanup; |
24c8dbbb DH |
163 | } |
164 | ||
165 | INIT_LIST_HEAD(&clp->cl_superblocks); | |
166 | clp->cl_rpcclient = ERR_PTR(-EINVAL); | |
167 | ||
59dca3b2 TM |
168 | clp->cl_proto = cl_init->proto; |
169 | ||
24c8dbbb | 170 | #ifdef CONFIG_NFS_V4 |
f4eecd5d AA |
171 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); |
172 | if (err) | |
173 | goto error_cleanup; | |
174 | ||
24c8dbbb | 175 | INIT_LIST_HEAD(&clp->cl_delegations); |
24c8dbbb | 176 | spin_lock_init(&clp->cl_lock); |
65f27f38 | 177 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
24c8dbbb DH |
178 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
179 | clp->cl_boot_time = CURRENT_TIME; | |
180 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
5aae4a9a | 181 | clp->cl_minorversion = cl_init->minorversion; |
97dc1359 | 182 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
24c8dbbb | 183 | #endif |
7c67db3a TM |
184 | cred = rpc_lookup_machine_cred(); |
185 | if (!IS_ERR(cred)) | |
186 | clp->cl_machine_cred = cred; | |
974cec8c AA |
187 | #if defined(CONFIG_NFS_V4_1) |
188 | INIT_LIST_HEAD(&clp->cl_layouts); | |
189 | #endif | |
14727281 DH |
190 | nfs_fscache_get_client_cookie(clp); |
191 | ||
24c8dbbb DH |
192 | return clp; |
193 | ||
71468513 | 194 | error_cleanup: |
24c8dbbb DH |
195 | kfree(clp); |
196 | error_0: | |
a21bdd9b | 197 | return ERR_PTR(err); |
24c8dbbb DH |
198 | } |
199 | ||
5dd3177a | 200 | #ifdef CONFIG_NFS_V4 |
557134a3 | 201 | #ifdef CONFIG_NFS_V4_1 |
ea005281 AA |
202 | static void nfs4_shutdown_session(struct nfs_client *clp) |
203 | { | |
204 | if (nfs4_has_session(clp)) | |
557134a3 | 205 | nfs4_destroy_session(clp->cl_session); |
888ef2e3 | 206 | } |
ea005281 AA |
207 | #else /* CONFIG_NFS_V4_1 */ |
208 | static void nfs4_shutdown_session(struct nfs_client *clp) | |
209 | { | |
210 | } | |
211 | #endif /* CONFIG_NFS_V4_1 */ | |
71468513 | 212 | |
888ef2e3 AB |
213 | /* |
214 | * Destroy the NFS4 callback service | |
215 | */ | |
216 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
217 | { | |
218 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
97dc1359 | 219 | nfs_callback_down(clp->cl_mvops->minor_version); |
888ef2e3 AB |
220 | } |
221 | ||
222 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
223 | { | |
224 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
225 | nfs4_kill_renewd(clp); | |
ea005281 | 226 | nfs4_shutdown_session(clp); |
71468513 | 227 | nfs4_destroy_callback(clp); |
888ef2e3 AB |
228 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
229 | nfs_idmap_delete(clp); | |
230 | ||
231 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
557134a3 | 232 | } |
f4eecd5d AA |
233 | |
234 | /* idr_remove_all is not needed as all id's are removed by nfs_put_client */ | |
235 | void nfs_cleanup_cb_ident_idr(void) | |
236 | { | |
237 | idr_destroy(&cb_ident_idr); | |
238 | } | |
239 | ||
240 | /* nfs_client_lock held */ | |
241 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
242 | { | |
243 | if (clp->cl_cb_ident) | |
244 | idr_remove(&cb_ident_idr, clp->cl_cb_ident); | |
245 | } | |
246 | ||
888ef2e3 AB |
247 | #else |
248 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
249 | { | |
250 | } | |
f4eecd5d AA |
251 | |
252 | void nfs_cleanup_cb_ident_idr(void) | |
253 | { | |
254 | } | |
255 | ||
256 | static void nfs_cb_idr_remove_locked(struct nfs_client *clp) | |
257 | { | |
258 | } | |
888ef2e3 | 259 | #endif /* CONFIG_NFS_V4 */ |
557134a3 | 260 | |
24c8dbbb DH |
261 | /* |
262 | * Destroy a shared client record | |
263 | */ | |
264 | static void nfs_free_client(struct nfs_client *clp) | |
265 | { | |
40c55319 | 266 | dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version); |
24c8dbbb | 267 | |
5dd3177a | 268 | nfs4_shutdown_client(clp); |
24c8dbbb | 269 | |
14727281 DH |
270 | nfs_fscache_release_client_cookie(clp); |
271 | ||
24c8dbbb DH |
272 | /* -EIO all pending I/O */ |
273 | if (!IS_ERR(clp->cl_rpcclient)) | |
274 | rpc_shutdown_client(clp->cl_rpcclient); | |
275 | ||
7c67db3a TM |
276 | if (clp->cl_machine_cred != NULL) |
277 | put_rpccred(clp->cl_machine_cred); | |
278 | ||
24c8dbbb DH |
279 | kfree(clp->cl_hostname); |
280 | kfree(clp); | |
281 | ||
282 | dprintk("<-- nfs_free_client()\n"); | |
283 | } | |
284 | ||
285 | /* | |
286 | * Release a reference to a shared client record | |
287 | */ | |
288 | void nfs_put_client(struct nfs_client *clp) | |
289 | { | |
27ba8512 DH |
290 | if (!clp) |
291 | return; | |
292 | ||
24c8dbbb DH |
293 | dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->cl_count)); |
294 | ||
295 | if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { | |
296 | list_del(&clp->cl_share_link); | |
f4eecd5d | 297 | nfs_cb_idr_remove_locked(clp); |
24c8dbbb DH |
298 | spin_unlock(&nfs_client_lock); |
299 | ||
300 | BUG_ON(!list_empty(&clp->cl_superblocks)); | |
301 | ||
302 | nfs_free_client(clp); | |
303 | } | |
304 | } | |
16b374ca | 305 | EXPORT_SYMBOL_GPL(nfs_put_client); |
24c8dbbb | 306 | |
9082a5cc | 307 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
9f4c899c TM |
308 | /* |
309 | * Test if two ip6 socket addresses refer to the same socket by | |
310 | * comparing relevant fields. The padding bytes specifically, are not | |
311 | * compared. sin6_flowinfo is not compared because it only affects QoS | |
312 | * and sin6_scope_id is only compared if the address is "link local" | |
313 | * because "link local" addresses need only be unique to a specific | |
314 | * link. Conversely, ordinary unicast addresses might have different | |
315 | * sin6_scope_id. | |
316 | * | |
317 | * The caller should ensure both socket addresses are AF_INET6. | |
318 | */ | |
3c8c45df CL |
319 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, |
320 | const struct sockaddr *sa2) | |
9f4c899c | 321 | { |
3c8c45df CL |
322 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; |
323 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
9f4c899c | 324 | |
3c8c45df CL |
325 | if (ipv6_addr_scope(&sin1->sin6_addr) == IPV6_ADDR_SCOPE_LINKLOCAL && |
326 | sin1->sin6_scope_id != sin2->sin6_scope_id) | |
9f4c899c | 327 | return 0; |
3b0d3f93 | 328 | |
b20d37ca | 329 | return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); |
3b0d3f93 | 330 | } |
3c8c45df CL |
331 | #else /* !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) */ |
332 | static int nfs_sockaddr_match_ipaddr6(const struct sockaddr *sa1, | |
333 | const struct sockaddr *sa2) | |
9f4c899c TM |
334 | { |
335 | return 0; | |
336 | } | |
9082a5cc | 337 | #endif |
3b0d3f93 | 338 | |
d7371c41 ID |
339 | /* |
340 | * Test if two ip4 socket addresses refer to the same socket, by | |
341 | * comparing relevant fields. The padding bytes specifically, are | |
342 | * not compared. | |
343 | * | |
344 | * The caller should ensure both socket addresses are AF_INET. | |
345 | */ | |
3c8c45df CL |
346 | static int nfs_sockaddr_match_ipaddr4(const struct sockaddr *sa1, |
347 | const struct sockaddr *sa2) | |
348 | { | |
349 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; | |
350 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
351 | ||
352 | return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; | |
353 | } | |
354 | ||
355 | static int nfs_sockaddr_cmp_ip6(const struct sockaddr *sa1, | |
356 | const struct sockaddr *sa2) | |
357 | { | |
358 | const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1; | |
359 | const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2; | |
360 | ||
361 | return nfs_sockaddr_match_ipaddr6(sa1, sa2) && | |
362 | (sin1->sin6_port == sin2->sin6_port); | |
363 | } | |
364 | ||
9f4c899c TM |
365 | static int nfs_sockaddr_cmp_ip4(const struct sockaddr *sa1, |
366 | const struct sockaddr *sa2) | |
d7371c41 | 367 | { |
3c8c45df CL |
368 | const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1; |
369 | const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2; | |
9f4c899c | 370 | |
3c8c45df CL |
371 | return nfs_sockaddr_match_ipaddr4(sa1, sa2) && |
372 | (sin1->sin_port == sin2->sin_port); | |
373 | } | |
374 | ||
375 | /* | |
376 | * Test if two socket addresses represent the same actual socket, | |
377 | * by comparing (only) relevant fields, excluding the port number. | |
378 | */ | |
379 | static int nfs_sockaddr_match_ipaddr(const struct sockaddr *sa1, | |
380 | const struct sockaddr *sa2) | |
381 | { | |
382 | if (sa1->sa_family != sa2->sa_family) | |
d7371c41 | 383 | return 0; |
3c8c45df CL |
384 | |
385 | switch (sa1->sa_family) { | |
386 | case AF_INET: | |
387 | return nfs_sockaddr_match_ipaddr4(sa1, sa2); | |
388 | case AF_INET6: | |
389 | return nfs_sockaddr_match_ipaddr6(sa1, sa2); | |
390 | } | |
391 | return 0; | |
d7371c41 ID |
392 | } |
393 | ||
d7371c41 ID |
394 | /* |
395 | * Test if two socket addresses represent the same actual socket, | |
3c8c45df | 396 | * by comparing (only) relevant fields, including the port number. |
d7371c41 ID |
397 | */ |
398 | static int nfs_sockaddr_cmp(const struct sockaddr *sa1, | |
399 | const struct sockaddr *sa2) | |
400 | { | |
401 | if (sa1->sa_family != sa2->sa_family) | |
402 | return 0; | |
403 | ||
404 | switch (sa1->sa_family) { | |
405 | case AF_INET: | |
9f4c899c | 406 | return nfs_sockaddr_cmp_ip4(sa1, sa2); |
d7371c41 | 407 | case AF_INET6: |
9f4c899c | 408 | return nfs_sockaddr_cmp_ip6(sa1, sa2); |
d7371c41 ID |
409 | } |
410 | return 0; | |
411 | } | |
412 | ||
c36fca52 AA |
413 | /* Common match routine for v4.0 and v4.1 callback services */ |
414 | bool | |
415 | nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp, | |
416 | u32 minorversion) | |
24c8dbbb | 417 | { |
c36fca52 | 418 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
24c8dbbb | 419 | |
c36fca52 AA |
420 | /* Don't match clients that failed to initialise */ |
421 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
422 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
423 | return false; | |
3b0d3f93 | 424 | |
c36fca52 AA |
425 | /* Match the version and minorversion */ |
426 | if (clp->rpc_ops->version != 4 || | |
427 | clp->cl_minorversion != minorversion) | |
428 | return false; | |
13bbc06a | 429 | |
c36fca52 AA |
430 | /* Match only the IP address, not the port number */ |
431 | if (!nfs_sockaddr_match_ipaddr(addr, clap)) | |
432 | return false; | |
24c8dbbb | 433 | |
c36fca52 | 434 | return true; |
3fbd67ad TM |
435 | } |
436 | ||
24c8dbbb | 437 | /* |
c81468a1 TM |
438 | * Find an nfs_client on the list that matches the initialisation data |
439 | * that is supplied. | |
24c8dbbb | 440 | */ |
c81468a1 | 441 | static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data) |
24c8dbbb DH |
442 | { |
443 | struct nfs_client *clp; | |
d7371c41 | 444 | const struct sockaddr *sap = data->addr; |
24c8dbbb | 445 | |
c81468a1 | 446 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { |
d7371c41 | 447 | const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
c81468a1 TM |
448 | /* Don't match clients that failed to initialise properly */ |
449 | if (clp->cl_cons_state < 0) | |
450 | continue; | |
451 | ||
452 | /* Different NFS versions cannot share the same nfs_client */ | |
40c55319 | 453 | if (clp->rpc_ops != data->rpc_ops) |
c81468a1 TM |
454 | continue; |
455 | ||
59dca3b2 TM |
456 | if (clp->cl_proto != data->proto) |
457 | continue; | |
5aae4a9a BH |
458 | /* Match nfsv4 minorversion */ |
459 | if (clp->cl_minorversion != data->minorversion) | |
460 | continue; | |
c81468a1 | 461 | /* Match the full socket address */ |
d7371c41 | 462 | if (!nfs_sockaddr_cmp(sap, clap)) |
c81468a1 TM |
463 | continue; |
464 | ||
465 | atomic_inc(&clp->cl_count); | |
466 | return clp; | |
13bbc06a | 467 | } |
c81468a1 | 468 | return NULL; |
24c8dbbb DH |
469 | } |
470 | ||
471 | /* | |
472 | * Look up a client by IP address and protocol version | |
473 | * - creates a new record if one doesn't yet exist | |
474 | */ | |
3a498026 | 475 | static struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init) |
24c8dbbb DH |
476 | { |
477 | struct nfs_client *clp, *new = NULL; | |
478 | int error; | |
479 | ||
d7422c47 CL |
480 | dprintk("--> nfs_get_client(%s,v%u)\n", |
481 | cl_init->hostname ?: "", cl_init->rpc_ops->version); | |
24c8dbbb DH |
482 | |
483 | /* see if the client already exists */ | |
484 | do { | |
485 | spin_lock(&nfs_client_lock); | |
486 | ||
c81468a1 | 487 | clp = nfs_match_client(cl_init); |
24c8dbbb DH |
488 | if (clp) |
489 | goto found_client; | |
490 | if (new) | |
491 | goto install_client; | |
492 | ||
493 | spin_unlock(&nfs_client_lock); | |
494 | ||
3a498026 | 495 | new = nfs_alloc_client(cl_init); |
a21bdd9b | 496 | } while (!IS_ERR(new)); |
24c8dbbb | 497 | |
a21bdd9b CL |
498 | dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new)); |
499 | return new; | |
24c8dbbb DH |
500 | |
501 | /* install a new client and return with it unready */ | |
502 | install_client: | |
503 | clp = new; | |
504 | list_add(&clp->cl_share_link, &nfs_client_list); | |
505 | spin_unlock(&nfs_client_lock); | |
506 | dprintk("--> nfs_get_client() = %p [new]\n", clp); | |
507 | return clp; | |
508 | ||
509 | /* found an existing client | |
510 | * - make sure it's ready before returning | |
511 | */ | |
512 | found_client: | |
513 | spin_unlock(&nfs_client_lock); | |
514 | ||
515 | if (new) | |
516 | nfs_free_client(new); | |
517 | ||
150030b7 | 518 | error = wait_event_killable(nfs_client_active_wq, |
76db6d95 | 519 | clp->cl_cons_state < NFS_CS_INITING); |
0bae89ec TM |
520 | if (error < 0) { |
521 | nfs_put_client(clp); | |
522 | return ERR_PTR(-ERESTARTSYS); | |
24c8dbbb DH |
523 | } |
524 | ||
525 | if (clp->cl_cons_state < NFS_CS_READY) { | |
526 | error = clp->cl_cons_state; | |
527 | nfs_put_client(clp); | |
528 | return ERR_PTR(error); | |
529 | } | |
530 | ||
54ceac45 DH |
531 | BUG_ON(clp->cl_cons_state != NFS_CS_READY); |
532 | ||
24c8dbbb DH |
533 | dprintk("--> nfs_get_client() = %p [share]\n", clp); |
534 | return clp; | |
535 | } | |
536 | ||
537 | /* | |
538 | * Mark a server as ready or failed | |
539 | */ | |
76db6d95 | 540 | void nfs_mark_client_ready(struct nfs_client *clp, int state) |
24c8dbbb DH |
541 | { |
542 | clp->cl_cons_state = state; | |
543 | wake_up_all(&nfs_client_active_wq); | |
544 | } | |
5006a76c | 545 | |
008f55d0 BH |
546 | /* |
547 | * With sessions, the client is not marked ready until after a | |
548 | * successful EXCHANGE_ID and CREATE_SESSION. | |
549 | * | |
550 | * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate | |
551 | * other versions of NFS can be tried. | |
552 | */ | |
553 | int nfs4_check_client_ready(struct nfs_client *clp) | |
554 | { | |
555 | if (!nfs4_has_session(clp)) | |
556 | return 0; | |
557 | if (clp->cl_cons_state < NFS_CS_READY) | |
558 | return -EPROTONOSUPPORT; | |
559 | return 0; | |
560 | } | |
561 | ||
5006a76c DH |
562 | /* |
563 | * Initialise the timeout values for a connection | |
564 | */ | |
565 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, | |
566 | unsigned int timeo, unsigned int retrans) | |
567 | { | |
568 | to->to_initval = timeo * HZ / 10; | |
569 | to->to_retries = retrans; | |
5006a76c DH |
570 | |
571 | switch (proto) { | |
0896a725 | 572 | case XPRT_TRANSPORT_TCP: |
2cf7ff7a | 573 | case XPRT_TRANSPORT_RDMA: |
259875ef TM |
574 | if (to->to_retries == 0) |
575 | to->to_retries = NFS_DEF_TCP_RETRANS; | |
7a3e3e18 | 576 | if (to->to_initval == 0) |
259875ef | 577 | to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10; |
5006a76c DH |
578 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
579 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
580 | to->to_increment = to->to_initval; | |
581 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
7a3e3e18 TM |
582 | if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
583 | to->to_maxval = NFS_MAX_TCP_TIMEOUT; | |
584 | if (to->to_maxval < to->to_initval) | |
585 | to->to_maxval = to->to_initval; | |
5006a76c DH |
586 | to->to_exponential = 0; |
587 | break; | |
0896a725 | 588 | case XPRT_TRANSPORT_UDP: |
259875ef TM |
589 | if (to->to_retries == 0) |
590 | to->to_retries = NFS_DEF_UDP_RETRANS; | |
5006a76c | 591 | if (!to->to_initval) |
259875ef | 592 | to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
5006a76c DH |
593 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
594 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
595 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
596 | to->to_exponential = 1; | |
597 | break; | |
259875ef TM |
598 | default: |
599 | BUG(); | |
5006a76c DH |
600 | } |
601 | } | |
602 | ||
603 | /* | |
604 | * Create an RPC client handle | |
605 | */ | |
59dca3b2 | 606 | static int nfs_create_rpc_client(struct nfs_client *clp, |
33170233 TM |
607 | const struct rpc_timeout *timeparms, |
608 | rpc_authflavor_t flavor, | |
4a01b8a4 | 609 | int discrtry, int noresvport) |
5006a76c | 610 | { |
5006a76c | 611 | struct rpc_clnt *clnt = NULL; |
41877d20 | 612 | struct rpc_create_args args = { |
c653ce3f | 613 | .net = &init_net, |
59dca3b2 | 614 | .protocol = clp->cl_proto, |
41877d20 | 615 | .address = (struct sockaddr *)&clp->cl_addr, |
6e4cffd7 | 616 | .addrsize = clp->cl_addrlen, |
33170233 | 617 | .timeout = timeparms, |
41877d20 CL |
618 | .servername = clp->cl_hostname, |
619 | .program = &nfs_program, | |
620 | .version = clp->rpc_ops->version, | |
621 | .authflavor = flavor, | |
622 | }; | |
5006a76c | 623 | |
4a01b8a4 CL |
624 | if (discrtry) |
625 | args.flags |= RPC_CLNT_CREATE_DISCRTRY; | |
626 | if (noresvport) | |
627 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; | |
628 | ||
5006a76c DH |
629 | if (!IS_ERR(clp->cl_rpcclient)) |
630 | return 0; | |
631 | ||
41877d20 | 632 | clnt = rpc_create(&args); |
5006a76c DH |
633 | if (IS_ERR(clnt)) { |
634 | dprintk("%s: cannot create RPC client. Error = %ld\n", | |
3110ff80 | 635 | __func__, PTR_ERR(clnt)); |
5006a76c DH |
636 | return PTR_ERR(clnt); |
637 | } | |
638 | ||
5006a76c DH |
639 | clp->cl_rpcclient = clnt; |
640 | return 0; | |
641 | } | |
54ceac45 DH |
642 | |
643 | /* | |
644 | * Version 2 or 3 client destruction | |
645 | */ | |
646 | static void nfs_destroy_server(struct nfs_server *server) | |
647 | { | |
5eebde23 SJ |
648 | if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) || |
649 | !(server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 | 650 | nlmclnt_done(server->nlm_host); |
54ceac45 DH |
651 | } |
652 | ||
653 | /* | |
654 | * Version 2 or 3 lockd setup | |
655 | */ | |
656 | static int nfs_start_lockd(struct nfs_server *server) | |
657 | { | |
9289e7f9 CL |
658 | struct nlm_host *host; |
659 | struct nfs_client *clp = server->nfs_client; | |
883bb163 CL |
660 | struct nlmclnt_initdata nlm_init = { |
661 | .hostname = clp->cl_hostname, | |
662 | .address = (struct sockaddr *)&clp->cl_addr, | |
663 | .addrlen = clp->cl_addrlen, | |
883bb163 | 664 | .nfs_version = clp->rpc_ops->version, |
0cb2659b CL |
665 | .noresvport = server->flags & NFS_MOUNT_NORESVPORT ? |
666 | 1 : 0, | |
883bb163 | 667 | }; |
54ceac45 | 668 | |
883bb163 | 669 | if (nlm_init.nfs_version > 3) |
9289e7f9 | 670 | return 0; |
5eebde23 SJ |
671 | if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) && |
672 | (server->flags & NFS_MOUNT_LOCAL_FCNTL)) | |
9289e7f9 CL |
673 | return 0; |
674 | ||
8a6e5deb TM |
675 | switch (clp->cl_proto) { |
676 | default: | |
677 | nlm_init.protocol = IPPROTO_TCP; | |
678 | break; | |
679 | case XPRT_TRANSPORT_UDP: | |
680 | nlm_init.protocol = IPPROTO_UDP; | |
681 | } | |
682 | ||
883bb163 | 683 | host = nlmclnt_init(&nlm_init); |
9289e7f9 CL |
684 | if (IS_ERR(host)) |
685 | return PTR_ERR(host); | |
686 | ||
687 | server->nlm_host = host; | |
688 | server->destroy = nfs_destroy_server; | |
689 | return 0; | |
54ceac45 DH |
690 | } |
691 | ||
692 | /* | |
693 | * Initialise an NFSv3 ACL client connection | |
694 | */ | |
695 | #ifdef CONFIG_NFS_V3_ACL | |
696 | static void nfs_init_server_aclclient(struct nfs_server *server) | |
697 | { | |
40c55319 | 698 | if (server->nfs_client->rpc_ops->version != 3) |
54ceac45 DH |
699 | goto out_noacl; |
700 | if (server->flags & NFS_MOUNT_NOACL) | |
701 | goto out_noacl; | |
702 | ||
703 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
704 | if (IS_ERR(server->client_acl)) | |
705 | goto out_noacl; | |
706 | ||
707 | /* No errors! Assume that Sun nfsacls are supported */ | |
708 | server->caps |= NFS_CAP_ACLS; | |
709 | return; | |
710 | ||
711 | out_noacl: | |
712 | server->caps &= ~NFS_CAP_ACLS; | |
713 | } | |
714 | #else | |
715 | static inline void nfs_init_server_aclclient(struct nfs_server *server) | |
716 | { | |
717 | server->flags &= ~NFS_MOUNT_NOACL; | |
718 | server->caps &= ~NFS_CAP_ACLS; | |
719 | } | |
720 | #endif | |
721 | ||
722 | /* | |
723 | * Create a general RPC client | |
724 | */ | |
33170233 TM |
725 | static int nfs_init_server_rpcclient(struct nfs_server *server, |
726 | const struct rpc_timeout *timeo, | |
727 | rpc_authflavor_t pseudoflavour) | |
54ceac45 DH |
728 | { |
729 | struct nfs_client *clp = server->nfs_client; | |
730 | ||
731 | server->client = rpc_clone_client(clp->cl_rpcclient); | |
732 | if (IS_ERR(server->client)) { | |
3110ff80 | 733 | dprintk("%s: couldn't create rpc_client!\n", __func__); |
54ceac45 DH |
734 | return PTR_ERR(server->client); |
735 | } | |
736 | ||
33170233 TM |
737 | memcpy(&server->client->cl_timeout_default, |
738 | timeo, | |
739 | sizeof(server->client->cl_timeout_default)); | |
740 | server->client->cl_timeout = &server->client->cl_timeout_default; | |
741 | ||
54ceac45 DH |
742 | if (pseudoflavour != clp->cl_rpcclient->cl_auth->au_flavor) { |
743 | struct rpc_auth *auth; | |
744 | ||
745 | auth = rpcauth_create(pseudoflavour, server->client); | |
746 | if (IS_ERR(auth)) { | |
3110ff80 | 747 | dprintk("%s: couldn't create credcache!\n", __func__); |
54ceac45 DH |
748 | return PTR_ERR(auth); |
749 | } | |
750 | } | |
751 | server->client->cl_softrtry = 0; | |
752 | if (server->flags & NFS_MOUNT_SOFT) | |
753 | server->client->cl_softrtry = 1; | |
754 | ||
54ceac45 DH |
755 | return 0; |
756 | } | |
757 | ||
758 | /* | |
759 | * Initialise an NFS2 or NFS3 client | |
760 | */ | |
2283f8d6 | 761 | static int nfs_init_client(struct nfs_client *clp, |
33170233 | 762 | const struct rpc_timeout *timeparms, |
2283f8d6 | 763 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 764 | { |
54ceac45 DH |
765 | int error; |
766 | ||
767 | if (clp->cl_cons_state == NFS_CS_READY) { | |
768 | /* the client is already initialised */ | |
769 | dprintk("<-- nfs_init_client() = 0 [already %p]\n", clp); | |
770 | return 0; | |
771 | } | |
772 | ||
54ceac45 DH |
773 | /* |
774 | * Create a client RPC handle for doing FSSTAT with UNIX auth only | |
775 | * - RFC 2623, sec 2.3.2 | |
776 | */ | |
d740351b CL |
777 | error = nfs_create_rpc_client(clp, timeparms, RPC_AUTH_UNIX, |
778 | 0, data->flags & NFS_MOUNT_NORESVPORT); | |
54ceac45 DH |
779 | if (error < 0) |
780 | goto error; | |
781 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
782 | return 0; | |
783 | ||
784 | error: | |
785 | nfs_mark_client_ready(clp, error); | |
786 | dprintk("<-- nfs_init_client() = xerror %d\n", error); | |
787 | return error; | |
788 | } | |
789 | ||
790 | /* | |
791 | * Create a version 2 or 3 client | |
792 | */ | |
2283f8d6 TT |
793 | static int nfs_init_server(struct nfs_server *server, |
794 | const struct nfs_parsed_mount_data *data) | |
54ceac45 | 795 | { |
3a498026 TM |
796 | struct nfs_client_initdata cl_init = { |
797 | .hostname = data->nfs_server.hostname, | |
d7422c47 | 798 | .addr = (const struct sockaddr *)&data->nfs_server.address, |
4c568017 | 799 | .addrlen = data->nfs_server.addrlen, |
40c55319 | 800 | .rpc_ops = &nfs_v2_clientops, |
59dca3b2 | 801 | .proto = data->nfs_server.protocol, |
3a498026 | 802 | }; |
33170233 | 803 | struct rpc_timeout timeparms; |
54ceac45 | 804 | struct nfs_client *clp; |
3a498026 | 805 | int error; |
54ceac45 DH |
806 | |
807 | dprintk("--> nfs_init_server()\n"); | |
808 | ||
809 | #ifdef CONFIG_NFS_V3 | |
8a6e5deb | 810 | if (data->version == 3) |
40c55319 | 811 | cl_init.rpc_ops = &nfs_v3_clientops; |
54ceac45 DH |
812 | #endif |
813 | ||
814 | /* Allocate or find a client reference we can use */ | |
3a498026 | 815 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
816 | if (IS_ERR(clp)) { |
817 | dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp)); | |
818 | return PTR_ERR(clp); | |
819 | } | |
820 | ||
33170233 TM |
821 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
822 | data->timeo, data->retrans); | |
823 | error = nfs_init_client(clp, &timeparms, data); | |
54ceac45 DH |
824 | if (error < 0) |
825 | goto error; | |
826 | ||
827 | server->nfs_client = clp; | |
828 | ||
829 | /* Initialise the client representation from the mount data */ | |
ff3525a5 | 830 | server->flags = data->flags; |
b797cac7 | 831 | server->options = data->options; |
62ab460c TM |
832 | server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
833 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP| | |
834 | NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME; | |
54ceac45 DH |
835 | |
836 | if (data->rsize) | |
837 | server->rsize = nfs_block_size(data->rsize, NULL); | |
838 | if (data->wsize) | |
839 | server->wsize = nfs_block_size(data->wsize, NULL); | |
840 | ||
841 | server->acregmin = data->acregmin * HZ; | |
842 | server->acregmax = data->acregmax * HZ; | |
843 | server->acdirmin = data->acdirmin * HZ; | |
844 | server->acdirmax = data->acdirmax * HZ; | |
845 | ||
846 | /* Start lockd here, before we might error out */ | |
847 | error = nfs_start_lockd(server); | |
848 | if (error < 0) | |
849 | goto error; | |
850 | ||
f22d6d79 CL |
851 | server->port = data->nfs_server.port; |
852 | ||
33170233 | 853 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 DH |
854 | if (error < 0) |
855 | goto error; | |
856 | ||
3f8400d1 CL |
857 | /* Preserve the values of mount_server-related mount options */ |
858 | if (data->mount_server.addrlen) { | |
859 | memcpy(&server->mountd_address, &data->mount_server.address, | |
860 | data->mount_server.addrlen); | |
861 | server->mountd_addrlen = data->mount_server.addrlen; | |
862 | } | |
863 | server->mountd_version = data->mount_server.version; | |
864 | server->mountd_port = data->mount_server.port; | |
865 | server->mountd_protocol = data->mount_server.protocol; | |
866 | ||
54ceac45 DH |
867 | server->namelen = data->namlen; |
868 | /* Create a client RPC handle for the NFSv3 ACL management interface */ | |
869 | nfs_init_server_aclclient(server); | |
54ceac45 DH |
870 | dprintk("<-- nfs_init_server() = 0 [new %p]\n", clp); |
871 | return 0; | |
872 | ||
873 | error: | |
874 | server->nfs_client = NULL; | |
875 | nfs_put_client(clp); | |
876 | dprintk("<-- nfs_init_server() = xerror %d\n", error); | |
877 | return error; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Load up the server record from information gained in an fsinfo record | |
882 | */ | |
883 | static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) | |
884 | { | |
885 | unsigned long max_rpc_payload; | |
886 | ||
887 | /* Work out a lot of parameters */ | |
888 | if (server->rsize == 0) | |
889 | server->rsize = nfs_block_size(fsinfo->rtpref, NULL); | |
890 | if (server->wsize == 0) | |
891 | server->wsize = nfs_block_size(fsinfo->wtpref, NULL); | |
892 | ||
893 | if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) | |
894 | server->rsize = nfs_block_size(fsinfo->rtmax, NULL); | |
895 | if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) | |
896 | server->wsize = nfs_block_size(fsinfo->wtmax, NULL); | |
897 | ||
898 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
899 | if (server->rsize > max_rpc_payload) | |
900 | server->rsize = max_rpc_payload; | |
901 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) | |
902 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
903 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
e0bf68dd | 904 | |
d993831f | 905 | server->backing_dev_info.name = "nfs"; |
54ceac45 DH |
906 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; |
907 | ||
908 | if (server->wsize > max_rpc_payload) | |
909 | server->wsize = max_rpc_payload; | |
910 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
911 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
912 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
85e174ba RL |
913 | set_pnfs_layoutdriver(server, fsinfo->layouttype); |
914 | ||
54ceac45 DH |
915 | server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); |
916 | ||
917 | server->dtsize = nfs_block_size(fsinfo->dtpref, NULL); | |
56e4ebf8 BS |
918 | if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES) |
919 | server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES; | |
54ceac45 DH |
920 | if (server->dtsize > server->rsize) |
921 | server->dtsize = server->rsize; | |
922 | ||
923 | if (server->flags & NFS_MOUNT_NOAC) { | |
924 | server->acregmin = server->acregmax = 0; | |
925 | server->acdirmin = server->acdirmax = 0; | |
926 | } | |
927 | ||
928 | server->maxfilesize = fsinfo->maxfilesize; | |
929 | ||
6b96724e RL |
930 | server->time_delta = fsinfo->time_delta; |
931 | ||
54ceac45 DH |
932 | /* We're airborne Set socket buffersize */ |
933 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
934 | } | |
935 | ||
936 | /* | |
937 | * Probe filesystem information, including the FSID on v2/v3 | |
938 | */ | |
939 | static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr) | |
940 | { | |
941 | struct nfs_fsinfo fsinfo; | |
942 | struct nfs_client *clp = server->nfs_client; | |
943 | int error; | |
944 | ||
945 | dprintk("--> nfs_probe_fsinfo()\n"); | |
946 | ||
947 | if (clp->rpc_ops->set_capabilities != NULL) { | |
948 | error = clp->rpc_ops->set_capabilities(server, mntfh); | |
949 | if (error < 0) | |
950 | goto out_error; | |
951 | } | |
952 | ||
953 | fsinfo.fattr = fattr; | |
85e174ba | 954 | fsinfo.layouttype = 0; |
54ceac45 DH |
955 | error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo); |
956 | if (error < 0) | |
957 | goto out_error; | |
958 | ||
959 | nfs_server_set_fsinfo(server, &fsinfo); | |
960 | ||
961 | /* Get some general file system info */ | |
962 | if (server->namelen == 0) { | |
963 | struct nfs_pathconf pathinfo; | |
964 | ||
965 | pathinfo.fattr = fattr; | |
966 | nfs_fattr_init(fattr); | |
967 | ||
968 | if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0) | |
969 | server->namelen = pathinfo.max_namelen; | |
970 | } | |
971 | ||
972 | dprintk("<-- nfs_probe_fsinfo() = 0\n"); | |
973 | return 0; | |
974 | ||
975 | out_error: | |
976 | dprintk("nfs_probe_fsinfo: error = %d\n", -error); | |
977 | return error; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Copy useful information when duplicating a server record | |
982 | */ | |
983 | static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source) | |
984 | { | |
985 | target->flags = source->flags; | |
356e76b8 CL |
986 | target->rsize = source->rsize; |
987 | target->wsize = source->wsize; | |
54ceac45 DH |
988 | target->acregmin = source->acregmin; |
989 | target->acregmax = source->acregmax; | |
990 | target->acdirmin = source->acdirmin; | |
991 | target->acdirmax = source->acdirmax; | |
992 | target->caps = source->caps; | |
2df54806 | 993 | target->options = source->options; |
54ceac45 DH |
994 | } |
995 | ||
996 | /* | |
997 | * Allocate and initialise a server record | |
998 | */ | |
999 | static struct nfs_server *nfs_alloc_server(void) | |
1000 | { | |
1001 | struct nfs_server *server; | |
1002 | ||
1003 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1004 | if (!server) | |
1005 | return NULL; | |
1006 | ||
1007 | server->client = server->client_acl = ERR_PTR(-EINVAL); | |
1008 | ||
1009 | /* Zero out the NFS state stuff */ | |
1010 | INIT_LIST_HEAD(&server->client_link); | |
1011 | INIT_LIST_HEAD(&server->master_link); | |
1012 | ||
ef818a28 SD |
1013 | atomic_set(&server->active, 0); |
1014 | ||
54ceac45 DH |
1015 | server->io_stats = nfs_alloc_iostats(); |
1016 | if (!server->io_stats) { | |
1017 | kfree(server); | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
48d07649 JA |
1021 | if (bdi_init(&server->backing_dev_info)) { |
1022 | nfs_free_iostats(server->io_stats); | |
1023 | kfree(server); | |
1024 | return NULL; | |
1025 | } | |
1026 | ||
54ceac45 DH |
1027 | return server; |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Free up a server record | |
1032 | */ | |
1033 | void nfs_free_server(struct nfs_server *server) | |
1034 | { | |
1035 | dprintk("--> nfs_free_server()\n"); | |
1036 | ||
85e174ba | 1037 | unset_pnfs_layoutdriver(server); |
54ceac45 DH |
1038 | spin_lock(&nfs_client_lock); |
1039 | list_del(&server->client_link); | |
1040 | list_del(&server->master_link); | |
1041 | spin_unlock(&nfs_client_lock); | |
1042 | ||
1043 | if (server->destroy != NULL) | |
1044 | server->destroy(server); | |
5cef338b TM |
1045 | |
1046 | if (!IS_ERR(server->client_acl)) | |
1047 | rpc_shutdown_client(server->client_acl); | |
54ceac45 DH |
1048 | if (!IS_ERR(server->client)) |
1049 | rpc_shutdown_client(server->client); | |
1050 | ||
1051 | nfs_put_client(server->nfs_client); | |
1052 | ||
1053 | nfs_free_iostats(server->io_stats); | |
e0bf68dd | 1054 | bdi_destroy(&server->backing_dev_info); |
54ceac45 DH |
1055 | kfree(server); |
1056 | nfs_release_automount_timer(); | |
1057 | dprintk("<-- nfs_free_server()\n"); | |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Create a version 2 or 3 volume record | |
1062 | * - keyed on server and FSID | |
1063 | */ | |
2283f8d6 | 1064 | struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1065 | struct nfs_fh *mntfh) |
1066 | { | |
1067 | struct nfs_server *server; | |
fbca779a | 1068 | struct nfs_fattr *fattr; |
54ceac45 DH |
1069 | int error; |
1070 | ||
1071 | server = nfs_alloc_server(); | |
1072 | if (!server) | |
1073 | return ERR_PTR(-ENOMEM); | |
1074 | ||
fbca779a TM |
1075 | error = -ENOMEM; |
1076 | fattr = nfs_alloc_fattr(); | |
1077 | if (fattr == NULL) | |
1078 | goto error; | |
1079 | ||
54ceac45 DH |
1080 | /* Get a client representation */ |
1081 | error = nfs_init_server(server, data); | |
1082 | if (error < 0) | |
1083 | goto error; | |
1084 | ||
1085 | BUG_ON(!server->nfs_client); | |
1086 | BUG_ON(!server->nfs_client->rpc_ops); | |
1087 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1088 | ||
1089 | /* Probe the root fh to retrieve its FSID */ | |
fbca779a | 1090 | error = nfs_probe_fsinfo(server, mntfh, fattr); |
54ceac45 DH |
1091 | if (error < 0) |
1092 | goto error; | |
54af3bb5 TM |
1093 | if (server->nfs_client->rpc_ops->version == 3) { |
1094 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) | |
1095 | server->namelen = NFS3_MAXNAMLEN; | |
1096 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1097 | server->caps |= NFS_CAP_READDIRPLUS; | |
1098 | } else { | |
1099 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
1100 | server->namelen = NFS2_MAXNAMLEN; | |
1101 | } | |
1102 | ||
fbca779a TM |
1103 | if (!(fattr->valid & NFS_ATTR_FATTR)) { |
1104 | error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr); | |
54ceac45 DH |
1105 | if (error < 0) { |
1106 | dprintk("nfs_create_server: getattr error = %d\n", -error); | |
1107 | goto error; | |
1108 | } | |
1109 | } | |
fbca779a | 1110 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
54ceac45 | 1111 | |
6daabf1b DH |
1112 | dprintk("Server FSID: %llx:%llx\n", |
1113 | (unsigned long long) server->fsid.major, | |
1114 | (unsigned long long) server->fsid.minor); | |
54ceac45 | 1115 | |
54ceac45 DH |
1116 | spin_lock(&nfs_client_lock); |
1117 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1118 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1119 | spin_unlock(&nfs_client_lock); | |
1120 | ||
1121 | server->mount_time = jiffies; | |
fbca779a | 1122 | nfs_free_fattr(fattr); |
54ceac45 DH |
1123 | return server; |
1124 | ||
1125 | error: | |
fbca779a | 1126 | nfs_free_fattr(fattr); |
54ceac45 DH |
1127 | nfs_free_server(server); |
1128 | return ERR_PTR(error); | |
1129 | } | |
1130 | ||
1131 | #ifdef CONFIG_NFS_V4 | |
c36fca52 AA |
1132 | /* |
1133 | * NFSv4.0 callback thread helper | |
1134 | * | |
1135 | * Find a client by IP address, protocol version, and minorversion | |
1136 | * | |
1137 | * Called from the pg_authenticate method. The callback identifier | |
1138 | * is not used as it has not been decoded. | |
1139 | * | |
1140 | * Returns NULL if no such client | |
1141 | */ | |
1142 | struct nfs_client * | |
1143 | nfs4_find_client_no_ident(const struct sockaddr *addr) | |
1144 | { | |
1145 | struct nfs_client *clp; | |
1146 | ||
1147 | spin_lock(&nfs_client_lock); | |
1148 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1149 | if (nfs4_cb_match_client(addr, clp, 0) == false) | |
1150 | continue; | |
1151 | atomic_inc(&clp->cl_count); | |
1152 | spin_unlock(&nfs_client_lock); | |
1153 | return clp; | |
1154 | } | |
1155 | spin_unlock(&nfs_client_lock); | |
1156 | return NULL; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * NFSv4.0 callback thread helper | |
1161 | * | |
1162 | * Find a client by callback identifier | |
1163 | */ | |
1164 | struct nfs_client * | |
1165 | nfs4_find_client_ident(int cb_ident) | |
1166 | { | |
1167 | struct nfs_client *clp; | |
1168 | ||
1169 | spin_lock(&nfs_client_lock); | |
1170 | clp = idr_find(&cb_ident_idr, cb_ident); | |
1171 | if (clp) | |
1172 | atomic_inc(&clp->cl_count); | |
1173 | spin_unlock(&nfs_client_lock); | |
1174 | return clp; | |
1175 | } | |
1176 | ||
1177 | #if defined(CONFIG_NFS_V4_1) | |
1178 | /* | |
1179 | * NFSv4.1 callback thread helper | |
1180 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
1181 | * minorversion, and sessionID | |
1182 | * | |
1183 | * CREATE_SESSION triggers a CB_NULL ping from servers. The callback service | |
1184 | * sessionid can only be set after the CREATE_SESSION return, so a CB_NULL | |
1185 | * can arrive before the callback sessionid is set. For CB_NULL calls, | |
1186 | * find a client by IP address protocol version, and minorversion. | |
1187 | * | |
1188 | * Returns NULL if no such client | |
1189 | */ | |
1190 | struct nfs_client * | |
1191 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
1192 | struct nfs4_sessionid *sid, int is_cb_compound) | |
1193 | { | |
1194 | struct nfs_client *clp; | |
1195 | ||
1196 | spin_lock(&nfs_client_lock); | |
1197 | list_for_each_entry(clp, &nfs_client_list, cl_share_link) { | |
1198 | if (nfs4_cb_match_client(addr, clp, 1) == false) | |
1199 | continue; | |
1200 | ||
1201 | if (!nfs4_has_session(clp)) | |
1202 | continue; | |
1203 | ||
1204 | /* Match sessionid unless cb_null call*/ | |
1205 | if (is_cb_compound && (memcmp(clp->cl_session->sess_id.data, | |
1206 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0)) | |
1207 | continue; | |
1208 | ||
1209 | atomic_inc(&clp->cl_count); | |
1210 | spin_unlock(&nfs_client_lock); | |
1211 | return clp; | |
1212 | } | |
1213 | spin_unlock(&nfs_client_lock); | |
1214 | return NULL; | |
1215 | } | |
1216 | ||
1217 | #else /* CONFIG_NFS_V4_1 */ | |
1218 | ||
1219 | struct nfs_client * | |
1220 | nfs4_find_client_sessionid(const struct sockaddr *addr, | |
1221 | struct nfs4_sessionid *sid, int is_cb_compound) | |
1222 | { | |
1223 | return NULL; | |
1224 | } | |
1225 | #endif /* CONFIG_NFS_V4_1 */ | |
1226 | ||
9bdaa86d BH |
1227 | /* |
1228 | * Initialize the NFS4 callback service | |
1229 | */ | |
1230 | static int nfs4_init_callback(struct nfs_client *clp) | |
1231 | { | |
1232 | int error; | |
1233 | ||
1234 | if (clp->rpc_ops->version == 4) { | |
0b5b7ae0 AA |
1235 | if (nfs4_has_session(clp)) { |
1236 | error = xprt_setup_backchannel( | |
1237 | clp->cl_rpcclient->cl_xprt, | |
1238 | NFS41_BC_MIN_CALLBACKS); | |
1239 | if (error < 0) | |
1240 | return error; | |
1241 | } | |
1242 | ||
97dc1359 | 1243 | error = nfs_callback_up(clp->cl_mvops->minor_version, |
71468513 | 1244 | clp->cl_rpcclient->cl_xprt); |
9bdaa86d BH |
1245 | if (error < 0) { |
1246 | dprintk("%s: failed to start callback. Error = %d\n", | |
1247 | __func__, error); | |
1248 | return error; | |
1249 | } | |
1250 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
1251 | } | |
1252 | return 0; | |
1253 | } | |
1254 | ||
557134a3 AA |
1255 | /* |
1256 | * Initialize the minor version specific parts of an NFS4 client record | |
1257 | */ | |
1258 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
1259 | { | |
1260 | #if defined(CONFIG_NFS_V4_1) | |
97dc1359 | 1261 | if (clp->cl_mvops->minor_version) { |
557134a3 AA |
1262 | struct nfs4_session *session = NULL; |
1263 | /* | |
1264 | * Create the session and mark it expired. | |
1265 | * When a SEQUENCE operation encounters the expired session | |
1266 | * it will do session recovery to initialize it. | |
1267 | */ | |
1268 | session = nfs4_alloc_session(clp); | |
1269 | if (!session) | |
1270 | return -ENOMEM; | |
1271 | ||
1272 | clp->cl_session = session; | |
fe74ba3a TM |
1273 | /* |
1274 | * The create session reply races with the server back | |
1275 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
1276 | * so that the client back channel can find the | |
1277 | * nfs_client struct | |
1278 | */ | |
1279 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
557134a3 AA |
1280 | } |
1281 | #endif /* CONFIG_NFS_V4_1 */ | |
1282 | ||
71468513 | 1283 | return nfs4_init_callback(clp); |
557134a3 AA |
1284 | } |
1285 | ||
54ceac45 DH |
1286 | /* |
1287 | * Initialise an NFS4 client record | |
1288 | */ | |
1289 | static int nfs4_init_client(struct nfs_client *clp, | |
33170233 | 1290 | const struct rpc_timeout *timeparms, |
7d9ac06f | 1291 | const char *ip_addr, |
d740351b CL |
1292 | rpc_authflavor_t authflavour, |
1293 | int flags) | |
54ceac45 DH |
1294 | { |
1295 | int error; | |
1296 | ||
1297 | if (clp->cl_cons_state == NFS_CS_READY) { | |
1298 | /* the client is initialised already */ | |
1299 | dprintk("<-- nfs4_init_client() = 0 [already %p]\n", clp); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | /* Check NFS protocol revision and initialize RPC op vector */ | |
1304 | clp->rpc_ops = &nfs_v4_clientops; | |
1305 | ||
59dca3b2 | 1306 | error = nfs_create_rpc_client(clp, timeparms, authflavour, |
d740351b | 1307 | 1, flags & NFS_MOUNT_NORESVPORT); |
54ceac45 DH |
1308 | if (error < 0) |
1309 | goto error; | |
f4373bf9 | 1310 | strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
54ceac45 DH |
1311 | |
1312 | error = nfs_idmap_new(clp); | |
1313 | if (error < 0) { | |
1314 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
3110ff80 | 1315 | __func__, error); |
54ceac45 DH |
1316 | goto error; |
1317 | } | |
9c5bf38d | 1318 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
54ceac45 | 1319 | |
557134a3 AA |
1320 | error = nfs4_init_client_minor_version(clp); |
1321 | if (error < 0) | |
1322 | goto error; | |
1323 | ||
76db6d95 AA |
1324 | if (!nfs4_has_session(clp)) |
1325 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
54ceac45 DH |
1326 | return 0; |
1327 | ||
1328 | error: | |
1329 | nfs_mark_client_ready(clp, error); | |
1330 | dprintk("<-- nfs4_init_client() = xerror %d\n", error); | |
1331 | return error; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * Set up an NFS4 client | |
1336 | */ | |
1337 | static int nfs4_set_client(struct nfs_server *server, | |
dcecae0f CL |
1338 | const char *hostname, |
1339 | const struct sockaddr *addr, | |
1340 | const size_t addrlen, | |
7d9ac06f | 1341 | const char *ip_addr, |
54ceac45 | 1342 | rpc_authflavor_t authflavour, |
94a417f3 BH |
1343 | int proto, const struct rpc_timeout *timeparms, |
1344 | u32 minorversion) | |
54ceac45 | 1345 | { |
3a498026 TM |
1346 | struct nfs_client_initdata cl_init = { |
1347 | .hostname = hostname, | |
dcecae0f CL |
1348 | .addr = addr, |
1349 | .addrlen = addrlen, | |
40c55319 | 1350 | .rpc_ops = &nfs_v4_clientops, |
59dca3b2 | 1351 | .proto = proto, |
5aae4a9a | 1352 | .minorversion = minorversion, |
3a498026 | 1353 | }; |
54ceac45 DH |
1354 | struct nfs_client *clp; |
1355 | int error; | |
1356 | ||
1357 | dprintk("--> nfs4_set_client()\n"); | |
1358 | ||
1359 | /* Allocate or find a client reference we can use */ | |
3a498026 | 1360 | clp = nfs_get_client(&cl_init); |
54ceac45 DH |
1361 | if (IS_ERR(clp)) { |
1362 | error = PTR_ERR(clp); | |
1363 | goto error; | |
1364 | } | |
d740351b CL |
1365 | error = nfs4_init_client(clp, timeparms, ip_addr, authflavour, |
1366 | server->flags); | |
54ceac45 DH |
1367 | if (error < 0) |
1368 | goto error_put; | |
1369 | ||
1370 | server->nfs_client = clp; | |
1371 | dprintk("<-- nfs4_set_client() = 0 [new %p]\n", clp); | |
1372 | return 0; | |
1373 | ||
1374 | error_put: | |
1375 | nfs_put_client(clp); | |
1376 | error: | |
1377 | dprintk("<-- nfs4_set_client() = xerror %d\n", error); | |
1378 | return error; | |
1379 | } | |
1380 | ||
557134a3 | 1381 | |
96b09e02 AA |
1382 | /* |
1383 | * Session has been established, and the client marked ready. | |
1384 | * Set the mount rsize and wsize with negotiated fore channel | |
1385 | * attributes which will be bound checked in nfs_server_set_fsinfo. | |
1386 | */ | |
1387 | static void nfs4_session_set_rwsize(struct nfs_server *server) | |
1388 | { | |
1389 | #ifdef CONFIG_NFS_V4_1 | |
2449ea2e AB |
1390 | struct nfs4_session *sess; |
1391 | u32 server_resp_sz; | |
1392 | u32 server_rqst_sz; | |
1393 | ||
96b09e02 AA |
1394 | if (!nfs4_has_session(server->nfs_client)) |
1395 | return; | |
2449ea2e AB |
1396 | sess = server->nfs_client->cl_session; |
1397 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1398 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1399 | ||
1400 | if (server->rsize > server_resp_sz) | |
1401 | server->rsize = server_resp_sz; | |
1402 | if (server->wsize > server_rqst_sz) | |
1403 | server->wsize = server_rqst_sz; | |
96b09e02 AA |
1404 | #endif /* CONFIG_NFS_V4_1 */ |
1405 | } | |
1406 | ||
44950b67 TM |
1407 | static int nfs4_server_common_setup(struct nfs_server *server, |
1408 | struct nfs_fh *mntfh) | |
1409 | { | |
1410 | struct nfs_fattr *fattr; | |
1411 | int error; | |
1412 | ||
1413 | BUG_ON(!server->nfs_client); | |
1414 | BUG_ON(!server->nfs_client->rpc_ops); | |
1415 | BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops); | |
1416 | ||
1417 | fattr = nfs_alloc_fattr(); | |
1418 | if (fattr == NULL) | |
1419 | return -ENOMEM; | |
1420 | ||
1421 | /* We must ensure the session is initialised first */ | |
1422 | error = nfs4_init_session(server); | |
1423 | if (error < 0) | |
1424 | goto out; | |
1425 | ||
1426 | /* Probe the root fh to retrieve its FSID and filehandle */ | |
1427 | error = nfs4_get_rootfh(server, mntfh); | |
1428 | if (error < 0) | |
1429 | goto out; | |
1430 | ||
1431 | dprintk("Server FSID: %llx:%llx\n", | |
1432 | (unsigned long long) server->fsid.major, | |
1433 | (unsigned long long) server->fsid.minor); | |
1434 | dprintk("Mount FH: %d\n", mntfh->size); | |
1435 | ||
1436 | nfs4_session_set_rwsize(server); | |
1437 | ||
1438 | error = nfs_probe_fsinfo(server, mntfh, fattr); | |
1439 | if (error < 0) | |
1440 | goto out; | |
1441 | ||
1442 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) | |
1443 | server->namelen = NFS4_MAXNAMLEN; | |
1444 | ||
1445 | spin_lock(&nfs_client_lock); | |
1446 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1447 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1448 | spin_unlock(&nfs_client_lock); | |
1449 | ||
1450 | server->mount_time = jiffies; | |
1451 | out: | |
1452 | nfs_free_fattr(fattr); | |
1453 | return error; | |
1454 | } | |
1455 | ||
54ceac45 DH |
1456 | /* |
1457 | * Create a version 4 volume record | |
1458 | */ | |
1459 | static int nfs4_init_server(struct nfs_server *server, | |
91ea40b9 | 1460 | const struct nfs_parsed_mount_data *data) |
54ceac45 | 1461 | { |
33170233 | 1462 | struct rpc_timeout timeparms; |
54ceac45 DH |
1463 | int error; |
1464 | ||
1465 | dprintk("--> nfs4_init_server()\n"); | |
1466 | ||
33170233 TM |
1467 | nfs_init_timeout_values(&timeparms, data->nfs_server.protocol, |
1468 | data->timeo, data->retrans); | |
1469 | ||
542fcc33 CL |
1470 | /* Initialise the client representation from the mount data */ |
1471 | server->flags = data->flags; | |
82f2e547 BS |
1472 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK; |
1473 | if (!(data->flags & NFS_MOUNT_NORDIRPLUS)) | |
1474 | server->caps |= NFS_CAP_READDIRPLUS; | |
b797cac7 | 1475 | server->options = data->options; |
542fcc33 | 1476 | |
33170233 TM |
1477 | /* Get a client record */ |
1478 | error = nfs4_set_client(server, | |
1479 | data->nfs_server.hostname, | |
1480 | (const struct sockaddr *)&data->nfs_server.address, | |
1481 | data->nfs_server.addrlen, | |
1482 | data->client_address, | |
1483 | data->auth_flavors[0], | |
1484 | data->nfs_server.protocol, | |
94a417f3 BH |
1485 | &timeparms, |
1486 | data->minorversion); | |
33170233 TM |
1487 | if (error < 0) |
1488 | goto error; | |
1489 | ||
54ceac45 DH |
1490 | if (data->rsize) |
1491 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1492 | if (data->wsize) | |
1493 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1494 | ||
1495 | server->acregmin = data->acregmin * HZ; | |
1496 | server->acregmax = data->acregmax * HZ; | |
1497 | server->acdirmin = data->acdirmin * HZ; | |
1498 | server->acdirmax = data->acdirmax * HZ; | |
1499 | ||
f22d6d79 CL |
1500 | server->port = data->nfs_server.port; |
1501 | ||
33170233 | 1502 | error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); |
54ceac45 | 1503 | |
33170233 | 1504 | error: |
54ceac45 DH |
1505 | /* Done */ |
1506 | dprintk("<-- nfs4_init_server() = %d\n", error); | |
1507 | return error; | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * Create a version 4 volume record | |
1512 | * - keyed on server and FSID | |
1513 | */ | |
91ea40b9 | 1514 | struct nfs_server *nfs4_create_server(const struct nfs_parsed_mount_data *data, |
54ceac45 DH |
1515 | struct nfs_fh *mntfh) |
1516 | { | |
54ceac45 DH |
1517 | struct nfs_server *server; |
1518 | int error; | |
1519 | ||
1520 | dprintk("--> nfs4_create_server()\n"); | |
1521 | ||
1522 | server = nfs_alloc_server(); | |
1523 | if (!server) | |
1524 | return ERR_PTR(-ENOMEM); | |
1525 | ||
54ceac45 | 1526 | /* set up the general RPC client */ |
91ea40b9 | 1527 | error = nfs4_init_server(server, data); |
54ceac45 DH |
1528 | if (error < 0) |
1529 | goto error; | |
1530 | ||
44950b67 | 1531 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1532 | if (error < 0) |
1533 | goto error; | |
1534 | ||
54ceac45 DH |
1535 | dprintk("<-- nfs4_create_server() = %p\n", server); |
1536 | return server; | |
1537 | ||
1538 | error: | |
1539 | nfs_free_server(server); | |
1540 | dprintk("<-- nfs4_create_server() = error %d\n", error); | |
1541 | return ERR_PTR(error); | |
1542 | } | |
1543 | ||
1544 | /* | |
1545 | * Create an NFS4 referral server record | |
1546 | */ | |
1547 | struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data, | |
f2d0d85e | 1548 | struct nfs_fh *mntfh) |
54ceac45 DH |
1549 | { |
1550 | struct nfs_client *parent_client; | |
1551 | struct nfs_server *server, *parent_server; | |
54ceac45 DH |
1552 | int error; |
1553 | ||
1554 | dprintk("--> nfs4_create_referral_server()\n"); | |
1555 | ||
1556 | server = nfs_alloc_server(); | |
1557 | if (!server) | |
1558 | return ERR_PTR(-ENOMEM); | |
1559 | ||
1560 | parent_server = NFS_SB(data->sb); | |
1561 | parent_client = parent_server->nfs_client; | |
1562 | ||
542fcc33 CL |
1563 | /* Initialise the client representation from the parent server */ |
1564 | nfs_server_copy_userdata(server, parent_server); | |
62ab460c | 1565 | server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR; |
542fcc33 | 1566 | |
54ceac45 DH |
1567 | /* Get a client representation. |
1568 | * Note: NFSv4 always uses TCP, */ | |
dcecae0f | 1569 | error = nfs4_set_client(server, data->hostname, |
6677d095 CL |
1570 | data->addr, |
1571 | data->addrlen, | |
dcecae0f CL |
1572 | parent_client->cl_ipaddr, |
1573 | data->authflavor, | |
1574 | parent_server->client->cl_xprt->prot, | |
94a417f3 | 1575 | parent_server->client->cl_timeout, |
97dc1359 | 1576 | parent_client->cl_mvops->minor_version); |
297de4f6 AA |
1577 | if (error < 0) |
1578 | goto error; | |
54ceac45 | 1579 | |
33170233 | 1580 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, data->authflavor); |
54ceac45 DH |
1581 | if (error < 0) |
1582 | goto error; | |
1583 | ||
44950b67 | 1584 | error = nfs4_server_common_setup(server, mntfh); |
54ceac45 DH |
1585 | if (error < 0) |
1586 | goto error; | |
1587 | ||
54ceac45 DH |
1588 | dprintk("<-- nfs_create_referral_server() = %p\n", server); |
1589 | return server; | |
1590 | ||
1591 | error: | |
1592 | nfs_free_server(server); | |
1593 | dprintk("<-- nfs4_create_referral_server() = error %d\n", error); | |
1594 | return ERR_PTR(error); | |
1595 | } | |
1596 | ||
1597 | #endif /* CONFIG_NFS_V4 */ | |
1598 | ||
1599 | /* | |
1600 | * Clone an NFS2, NFS3 or NFS4 server record | |
1601 | */ | |
1602 | struct nfs_server *nfs_clone_server(struct nfs_server *source, | |
1603 | struct nfs_fh *fh, | |
1604 | struct nfs_fattr *fattr) | |
1605 | { | |
1606 | struct nfs_server *server; | |
fbca779a | 1607 | struct nfs_fattr *fattr_fsinfo; |
54ceac45 DH |
1608 | int error; |
1609 | ||
1610 | dprintk("--> nfs_clone_server(,%llx:%llx,)\n", | |
6daabf1b DH |
1611 | (unsigned long long) fattr->fsid.major, |
1612 | (unsigned long long) fattr->fsid.minor); | |
54ceac45 DH |
1613 | |
1614 | server = nfs_alloc_server(); | |
1615 | if (!server) | |
1616 | return ERR_PTR(-ENOMEM); | |
1617 | ||
fbca779a TM |
1618 | error = -ENOMEM; |
1619 | fattr_fsinfo = nfs_alloc_fattr(); | |
1620 | if (fattr_fsinfo == NULL) | |
1621 | goto out_free_server; | |
1622 | ||
54ceac45 DH |
1623 | /* Copy data from the source */ |
1624 | server->nfs_client = source->nfs_client; | |
1625 | atomic_inc(&server->nfs_client->cl_count); | |
1626 | nfs_server_copy_userdata(server, source); | |
1627 | ||
1628 | server->fsid = fattr->fsid; | |
1629 | ||
33170233 TM |
1630 | error = nfs_init_server_rpcclient(server, |
1631 | source->client->cl_timeout, | |
1632 | source->client->cl_auth->au_flavor); | |
54ceac45 DH |
1633 | if (error < 0) |
1634 | goto out_free_server; | |
1635 | if (!IS_ERR(source->client_acl)) | |
1636 | nfs_init_server_aclclient(server); | |
1637 | ||
1638 | /* probe the filesystem info for this server filesystem */ | |
fbca779a | 1639 | error = nfs_probe_fsinfo(server, fh, fattr_fsinfo); |
54ceac45 DH |
1640 | if (error < 0) |
1641 | goto out_free_server; | |
1642 | ||
54af3bb5 TM |
1643 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1644 | server->namelen = NFS4_MAXNAMLEN; | |
1645 | ||
54ceac45 | 1646 | dprintk("Cloned FSID: %llx:%llx\n", |
6daabf1b DH |
1647 | (unsigned long long) server->fsid.major, |
1648 | (unsigned long long) server->fsid.minor); | |
54ceac45 DH |
1649 | |
1650 | error = nfs_start_lockd(server); | |
1651 | if (error < 0) | |
1652 | goto out_free_server; | |
1653 | ||
1654 | spin_lock(&nfs_client_lock); | |
1655 | list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); | |
1656 | list_add_tail(&server->master_link, &nfs_volume_list); | |
1657 | spin_unlock(&nfs_client_lock); | |
1658 | ||
1659 | server->mount_time = jiffies; | |
1660 | ||
fbca779a | 1661 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1662 | dprintk("<-- nfs_clone_server() = %p\n", server); |
1663 | return server; | |
1664 | ||
1665 | out_free_server: | |
fbca779a | 1666 | nfs_free_fattr(fattr_fsinfo); |
54ceac45 DH |
1667 | nfs_free_server(server); |
1668 | dprintk("<-- nfs_clone_server() = error %d\n", error); | |
1669 | return ERR_PTR(error); | |
1670 | } | |
6aaca566 DH |
1671 | |
1672 | #ifdef CONFIG_PROC_FS | |
1673 | static struct proc_dir_entry *proc_fs_nfs; | |
1674 | ||
1675 | static int nfs_server_list_open(struct inode *inode, struct file *file); | |
1676 | static void *nfs_server_list_start(struct seq_file *p, loff_t *pos); | |
1677 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1678 | static void nfs_server_list_stop(struct seq_file *p, void *v); | |
1679 | static int nfs_server_list_show(struct seq_file *m, void *v); | |
1680 | ||
88e9d34c | 1681 | static const struct seq_operations nfs_server_list_ops = { |
6aaca566 DH |
1682 | .start = nfs_server_list_start, |
1683 | .next = nfs_server_list_next, | |
1684 | .stop = nfs_server_list_stop, | |
1685 | .show = nfs_server_list_show, | |
1686 | }; | |
1687 | ||
00977a59 | 1688 | static const struct file_operations nfs_server_list_fops = { |
6aaca566 DH |
1689 | .open = nfs_server_list_open, |
1690 | .read = seq_read, | |
1691 | .llseek = seq_lseek, | |
1692 | .release = seq_release, | |
34b37235 | 1693 | .owner = THIS_MODULE, |
6aaca566 DH |
1694 | }; |
1695 | ||
1696 | static int nfs_volume_list_open(struct inode *inode, struct file *file); | |
1697 | static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos); | |
1698 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos); | |
1699 | static void nfs_volume_list_stop(struct seq_file *p, void *v); | |
1700 | static int nfs_volume_list_show(struct seq_file *m, void *v); | |
1701 | ||
88e9d34c | 1702 | static const struct seq_operations nfs_volume_list_ops = { |
6aaca566 DH |
1703 | .start = nfs_volume_list_start, |
1704 | .next = nfs_volume_list_next, | |
1705 | .stop = nfs_volume_list_stop, | |
1706 | .show = nfs_volume_list_show, | |
1707 | }; | |
1708 | ||
00977a59 | 1709 | static const struct file_operations nfs_volume_list_fops = { |
6aaca566 DH |
1710 | .open = nfs_volume_list_open, |
1711 | .read = seq_read, | |
1712 | .llseek = seq_lseek, | |
1713 | .release = seq_release, | |
34b37235 | 1714 | .owner = THIS_MODULE, |
6aaca566 DH |
1715 | }; |
1716 | ||
1717 | /* | |
1718 | * open "/proc/fs/nfsfs/servers" which provides a summary of servers with which | |
1719 | * we're dealing | |
1720 | */ | |
1721 | static int nfs_server_list_open(struct inode *inode, struct file *file) | |
1722 | { | |
1723 | struct seq_file *m; | |
1724 | int ret; | |
1725 | ||
1726 | ret = seq_open(file, &nfs_server_list_ops); | |
1727 | if (ret < 0) | |
1728 | return ret; | |
1729 | ||
1730 | m = file->private_data; | |
1731 | m->private = PDE(inode)->data; | |
1732 | ||
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | /* | |
1737 | * set up the iterator to start reading from the server list and return the first item | |
1738 | */ | |
1739 | static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos) | |
1740 | { | |
6aaca566 DH |
1741 | /* lock the list against modification */ |
1742 | spin_lock(&nfs_client_lock); | |
259902ea | 1743 | return seq_list_start_head(&nfs_client_list, *_pos); |
6aaca566 DH |
1744 | } |
1745 | ||
1746 | /* | |
1747 | * move to next server | |
1748 | */ | |
1749 | static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1750 | { | |
259902ea | 1751 | return seq_list_next(v, &nfs_client_list, pos); |
6aaca566 DH |
1752 | } |
1753 | ||
1754 | /* | |
1755 | * clean up after reading from the transports list | |
1756 | */ | |
1757 | static void nfs_server_list_stop(struct seq_file *p, void *v) | |
1758 | { | |
1759 | spin_unlock(&nfs_client_lock); | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * display a header line followed by a load of call lines | |
1764 | */ | |
1765 | static int nfs_server_list_show(struct seq_file *m, void *v) | |
1766 | { | |
1767 | struct nfs_client *clp; | |
1768 | ||
1769 | /* display header on line 1 */ | |
259902ea | 1770 | if (v == &nfs_client_list) { |
6aaca566 DH |
1771 | seq_puts(m, "NV SERVER PORT USE HOSTNAME\n"); |
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | /* display one transport per line on subsequent lines */ | |
1776 | clp = list_entry(v, struct nfs_client, cl_share_link); | |
1777 | ||
5d8515ca | 1778 | seq_printf(m, "v%u %s %s %3d %s\n", |
40c55319 | 1779 | clp->rpc_ops->version, |
5d8515ca CL |
1780 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1781 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 DH |
1782 | atomic_read(&clp->cl_count), |
1783 | clp->cl_hostname); | |
1784 | ||
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes | |
1790 | */ | |
1791 | static int nfs_volume_list_open(struct inode *inode, struct file *file) | |
1792 | { | |
1793 | struct seq_file *m; | |
1794 | int ret; | |
1795 | ||
1796 | ret = seq_open(file, &nfs_volume_list_ops); | |
1797 | if (ret < 0) | |
1798 | return ret; | |
1799 | ||
1800 | m = file->private_data; | |
1801 | m->private = PDE(inode)->data; | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * set up the iterator to start reading from the volume list and return the first item | |
1808 | */ | |
1809 | static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos) | |
1810 | { | |
6aaca566 DH |
1811 | /* lock the list against modification */ |
1812 | spin_lock(&nfs_client_lock); | |
259902ea | 1813 | return seq_list_start_head(&nfs_volume_list, *_pos); |
6aaca566 DH |
1814 | } |
1815 | ||
1816 | /* | |
1817 | * move to next volume | |
1818 | */ | |
1819 | static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos) | |
1820 | { | |
259902ea | 1821 | return seq_list_next(v, &nfs_volume_list, pos); |
6aaca566 DH |
1822 | } |
1823 | ||
1824 | /* | |
1825 | * clean up after reading from the transports list | |
1826 | */ | |
1827 | static void nfs_volume_list_stop(struct seq_file *p, void *v) | |
1828 | { | |
1829 | spin_unlock(&nfs_client_lock); | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * display a header line followed by a load of call lines | |
1834 | */ | |
1835 | static int nfs_volume_list_show(struct seq_file *m, void *v) | |
1836 | { | |
1837 | struct nfs_server *server; | |
1838 | struct nfs_client *clp; | |
1839 | char dev[8], fsid[17]; | |
1840 | ||
1841 | /* display header on line 1 */ | |
259902ea | 1842 | if (v == &nfs_volume_list) { |
5d1acff1 | 1843 | seq_puts(m, "NV SERVER PORT DEV FSID FSC\n"); |
6aaca566 DH |
1844 | return 0; |
1845 | } | |
1846 | /* display one transport per line on subsequent lines */ | |
1847 | server = list_entry(v, struct nfs_server, master_link); | |
1848 | clp = server->nfs_client; | |
1849 | ||
1850 | snprintf(dev, 8, "%u:%u", | |
1851 | MAJOR(server->s_dev), MINOR(server->s_dev)); | |
1852 | ||
1853 | snprintf(fsid, 17, "%llx:%llx", | |
6daabf1b DH |
1854 | (unsigned long long) server->fsid.major, |
1855 | (unsigned long long) server->fsid.minor); | |
6aaca566 | 1856 | |
5d1acff1 | 1857 | seq_printf(m, "v%u %s %s %-7s %-17s %s\n", |
40c55319 | 1858 | clp->rpc_ops->version, |
5d8515ca CL |
1859 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR), |
1860 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT), | |
6aaca566 | 1861 | dev, |
5d1acff1 DH |
1862 | fsid, |
1863 | nfs_server_fscache_state(server)); | |
6aaca566 DH |
1864 | |
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | /* | |
1869 | * initialise the /proc/fs/nfsfs/ directory | |
1870 | */ | |
1871 | int __init nfs_fs_proc_init(void) | |
1872 | { | |
1873 | struct proc_dir_entry *p; | |
1874 | ||
36a5aeb8 | 1875 | proc_fs_nfs = proc_mkdir("fs/nfsfs", NULL); |
6aaca566 DH |
1876 | if (!proc_fs_nfs) |
1877 | goto error_0; | |
1878 | ||
6aaca566 | 1879 | /* a file of servers with which we're dealing */ |
34b37235 DL |
1880 | p = proc_create("servers", S_IFREG|S_IRUGO, |
1881 | proc_fs_nfs, &nfs_server_list_fops); | |
6aaca566 DH |
1882 | if (!p) |
1883 | goto error_1; | |
1884 | ||
6aaca566 | 1885 | /* a file of volumes that we have mounted */ |
34b37235 DL |
1886 | p = proc_create("volumes", S_IFREG|S_IRUGO, |
1887 | proc_fs_nfs, &nfs_volume_list_fops); | |
6aaca566 DH |
1888 | if (!p) |
1889 | goto error_2; | |
6aaca566 DH |
1890 | return 0; |
1891 | ||
1892 | error_2: | |
1893 | remove_proc_entry("servers", proc_fs_nfs); | |
1894 | error_1: | |
36a5aeb8 | 1895 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1896 | error_0: |
1897 | return -ENOMEM; | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * clean up the /proc/fs/nfsfs/ directory | |
1902 | */ | |
1903 | void nfs_fs_proc_exit(void) | |
1904 | { | |
1905 | remove_proc_entry("volumes", proc_fs_nfs); | |
1906 | remove_proc_entry("servers", proc_fs_nfs); | |
36a5aeb8 | 1907 | remove_proc_entry("fs/nfsfs", NULL); |
6aaca566 DH |
1908 | } |
1909 | ||
1910 | #endif /* CONFIG_PROC_FS */ |