Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
428360d7 BS |
2 | /* |
3 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | */ | |
fcf10398 | 6 | #include <linux/module.h> |
428360d7 | 7 | #include <linux/nfs_fs.h> |
fcf10398 | 8 | #include <linux/nfs_mount.h> |
5976687a | 9 | #include <linux/sunrpc/addr.h> |
428360d7 BS |
10 | #include <linux/sunrpc/auth.h> |
11 | #include <linux/sunrpc/xprt.h> | |
12 | #include <linux/sunrpc/bc_xprt.h> | |
6aa23d76 | 13 | #include <linux/sunrpc/rpc_pipe_fs.h> |
428360d7 BS |
14 | #include "internal.h" |
15 | #include "callback.h" | |
fcf10398 | 16 | #include "delegation.h" |
73e39aaa | 17 | #include "nfs4session.h" |
40c64c26 | 18 | #include "nfs4idmap.h" |
fcf10398 BS |
19 | #include "pnfs.h" |
20 | #include "netns.h" | |
428360d7 BS |
21 | |
22 | #define NFSDBG_FACILITY NFSDBG_CLIENT | |
23 | ||
ec409897 BS |
24 | /* |
25 | * Get a unique NFSv4.0 callback identifier which will be used | |
26 | * by the V4.0 callback service to lookup the nfs_client struct | |
27 | */ | |
28 | static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) | |
29 | { | |
30 | int ret = 0; | |
31 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
32 | ||
33 | if (clp->rpc_ops->version != 4 || minorversion != 0) | |
34 | return ret; | |
d6870312 | 35 | idr_preload(GFP_KERNEL); |
ec409897 | 36 | spin_lock(&nn->nfs_client_lock); |
c68a027c | 37 | ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); |
d6870312 TH |
38 | if (ret >= 0) |
39 | clp->cl_cb_ident = ret; | |
ec409897 | 40 | spin_unlock(&nn->nfs_client_lock); |
d6870312 TH |
41 | idr_preload_end(); |
42 | return ret < 0 ? ret : 0; | |
ec409897 BS |
43 | } |
44 | ||
45 | #ifdef CONFIG_NFS_V4_1 | |
302fad7b | 46 | /* |
0e20162e AA |
47 | * Per auth flavor data server rpc clients |
48 | */ | |
49 | struct nfs4_ds_server { | |
50 | struct list_head list; /* ds_clp->cl_ds_clients */ | |
51 | struct rpc_clnt *rpc_clnt; | |
52 | }; | |
53 | ||
54 | /** | |
302fad7b TM |
55 | * nfs4_find_ds_client - Common lookup case for DS I/O |
56 | * @ds_clp: pointer to the DS's nfs_client | |
57 | * @flavor: rpc auth flavour to match | |
0e20162e AA |
58 | */ |
59 | static struct nfs4_ds_server * | |
60 | nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
61 | { | |
62 | struct nfs4_ds_server *dss; | |
63 | ||
64 | rcu_read_lock(); | |
65 | list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { | |
66 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
67 | continue; | |
68 | goto out; | |
69 | } | |
70 | dss = NULL; | |
71 | out: | |
72 | rcu_read_unlock(); | |
73 | return dss; | |
74 | } | |
75 | ||
76 | static struct nfs4_ds_server * | |
77 | nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, | |
78 | struct nfs4_ds_server *new) | |
79 | { | |
80 | struct nfs4_ds_server *dss; | |
81 | ||
82 | spin_lock(&ds_clp->cl_lock); | |
83 | list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { | |
84 | if (dss->rpc_clnt->cl_auth->au_flavor != flavor) | |
85 | continue; | |
86 | goto out; | |
87 | } | |
88 | if (new) | |
89 | list_add_rcu(&new->list, &ds_clp->cl_ds_clients); | |
90 | dss = new; | |
91 | out: | |
92 | spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ | |
93 | return dss; | |
94 | } | |
95 | ||
96 | static struct nfs4_ds_server * | |
97 | nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) | |
98 | { | |
99 | struct nfs4_ds_server *dss; | |
100 | ||
101 | dss = kmalloc(sizeof(*dss), GFP_NOFS); | |
102 | if (dss == NULL) | |
103 | return ERR_PTR(-ENOMEM); | |
104 | ||
105 | dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); | |
106 | if (IS_ERR(dss->rpc_clnt)) { | |
107 | int err = PTR_ERR(dss->rpc_clnt); | |
108 | kfree (dss); | |
109 | return ERR_PTR(err); | |
110 | } | |
111 | INIT_LIST_HEAD(&dss->list); | |
112 | ||
113 | return dss; | |
114 | } | |
115 | ||
116 | static void | |
117 | nfs4_free_ds_server(struct nfs4_ds_server *dss) | |
118 | { | |
119 | rpc_release_client(dss->rpc_clnt); | |
120 | kfree(dss); | |
121 | } | |
122 | ||
123 | /** | |
302fad7b TM |
124 | * nfs4_find_or_create_ds_client - Find or create a DS rpc client |
125 | * @ds_clp: pointer to the DS's nfs_client | |
126 | * @inode: pointer to the inode | |
127 | * | |
128 | * Find or create a DS rpc client with th MDS server rpc client auth flavor | |
129 | * in the nfs_client cl_ds_clients list. | |
130 | */ | |
0e20162e AA |
131 | struct rpc_clnt * |
132 | nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) | |
133 | { | |
134 | struct nfs4_ds_server *dss, *new; | |
135 | rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; | |
136 | ||
137 | dss = nfs4_find_ds_client(ds_clp, flavor); | |
138 | if (dss != NULL) | |
139 | goto out; | |
140 | new = nfs4_alloc_ds_server(ds_clp, flavor); | |
141 | if (IS_ERR(new)) | |
142 | return ERR_CAST(new); | |
143 | dss = nfs4_add_ds_client(ds_clp, flavor, new); | |
144 | if (dss != new) | |
145 | nfs4_free_ds_server(new); | |
146 | out: | |
147 | return dss->rpc_clnt; | |
148 | } | |
149 | EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); | |
150 | ||
151 | static void | |
152 | nfs4_shutdown_ds_clients(struct nfs_client *clp) | |
153 | { | |
154 | struct nfs4_ds_server *dss; | |
0e20162e AA |
155 | |
156 | while (!list_empty(&clp->cl_ds_clients)) { | |
157 | dss = list_entry(clp->cl_ds_clients.next, | |
158 | struct nfs4_ds_server, list); | |
159 | list_del(&dss->list); | |
160 | rpc_shutdown_client(dss->rpc_clnt); | |
161 | kfree (dss); | |
162 | } | |
163 | } | |
164 | ||
bc0c9079 OK |
165 | static void |
166 | nfs4_cleanup_callback(struct nfs_client *clp) | |
167 | { | |
168 | struct nfs4_copy_state *cp_state; | |
169 | ||
170 | while (!list_empty(&clp->pending_cb_stateids)) { | |
171 | cp_state = list_entry(clp->pending_cb_stateids.next, | |
172 | struct nfs4_copy_state, copies); | |
173 | list_del(&cp_state->copies); | |
174 | kfree(cp_state); | |
175 | } | |
176 | } | |
177 | ||
abf79bb3 | 178 | void nfs41_shutdown_client(struct nfs_client *clp) |
ec409897 BS |
179 | { |
180 | if (nfs4_has_session(clp)) { | |
bc0c9079 | 181 | nfs4_cleanup_callback(clp); |
0e20162e | 182 | nfs4_shutdown_ds_clients(clp); |
ec409897 BS |
183 | nfs4_destroy_session(clp->cl_session); |
184 | nfs4_destroy_clientid(clp); | |
185 | } | |
186 | ||
187 | } | |
abf79bb3 CL |
188 | #endif /* CONFIG_NFS_V4_1 */ |
189 | ||
190 | void nfs40_shutdown_client(struct nfs_client *clp) | |
ec409897 | 191 | { |
abf79bb3 | 192 | if (clp->cl_slot_tbl) { |
20b9a902 | 193 | nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
abf79bb3 CL |
194 | kfree(clp->cl_slot_tbl); |
195 | } | |
ec409897 | 196 | } |
ec409897 BS |
197 | |
198 | struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) | |
199 | { | |
dd99e9f9 TM |
200 | char buf[INET6_ADDRSTRLEN + 1]; |
201 | const char *ip_addr = cl_init->ip_addr; | |
ec409897 | 202 | struct nfs_client *clp = nfs_alloc_client(cl_init); |
dd99e9f9 TM |
203 | int err; |
204 | ||
ec409897 BS |
205 | if (IS_ERR(clp)) |
206 | return clp; | |
207 | ||
208 | err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); | |
209 | if (err) | |
210 | goto error; | |
211 | ||
42c2c424 SD |
212 | if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
213 | err = -EINVAL; | |
214 | goto error; | |
215 | } | |
216 | ||
ec409897 BS |
217 | spin_lock_init(&clp->cl_lock); |
218 | INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); | |
0e20162e | 219 | INIT_LIST_HEAD(&clp->cl_ds_clients); |
ec409897 BS |
220 | rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
221 | clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; | |
ec409897 | 222 | clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
c9fdeb28 | 223 | clp->cl_mig_gen = 1; |
a1d617d8 JL |
224 | #if IS_ENABLED(CONFIG_NFS_V4_1) |
225 | init_waitqueue_head(&clp->cl_lock_waitq); | |
226 | #endif | |
bc0c9079 | 227 | INIT_LIST_HEAD(&clp->pending_cb_stateids); |
dd99e9f9 TM |
228 | |
229 | if (cl_init->minorversion != 0) | |
230 | __set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); | |
231 | __set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); | |
232 | __set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); | |
233 | ||
234 | /* | |
235 | * Set up the connection to the server before we add add to the | |
236 | * global list. | |
237 | */ | |
238 | err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); | |
239 | if (err == -EINVAL) | |
240 | err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); | |
241 | if (err < 0) | |
242 | goto error; | |
243 | ||
244 | /* If no clientaddr= option was specified, find a usable cb address */ | |
245 | if (ip_addr == NULL) { | |
246 | struct sockaddr_storage cb_addr; | |
247 | struct sockaddr *sap = (struct sockaddr *)&cb_addr; | |
248 | ||
249 | err = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); | |
250 | if (err < 0) | |
251 | goto error; | |
252 | err = rpc_ntop(sap, buf, sizeof(buf)); | |
253 | if (err < 0) | |
254 | goto error; | |
255 | ip_addr = (const char *)buf; | |
256 | } | |
0dd7439f | 257 | strscpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
dd99e9f9 TM |
258 | |
259 | err = nfs_idmap_new(clp); | |
260 | if (err < 0) { | |
261 | dprintk("%s: failed to create idmapper. Error = %d\n", | |
262 | __func__, err); | |
263 | goto error; | |
264 | } | |
265 | __set_bit(NFS_CS_IDMAP, &clp->cl_res_state); | |
ec409897 BS |
266 | return clp; |
267 | ||
268 | error: | |
7653f6ff | 269 | nfs_free_client(clp); |
ec409897 BS |
270 | return ERR_PTR(err); |
271 | } | |
272 | ||
273 | /* | |
274 | * Destroy the NFS4 callback service | |
275 | */ | |
276 | static void nfs4_destroy_callback(struct nfs_client *clp) | |
277 | { | |
278 | if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) | |
c946556b | 279 | nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
ec409897 BS |
280 | } |
281 | ||
282 | static void nfs4_shutdown_client(struct nfs_client *clp) | |
283 | { | |
284 | if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) | |
285 | nfs4_kill_renewd(clp); | |
abf79bb3 | 286 | clp->cl_mvops->shutdown_client(clp); |
ec409897 BS |
287 | nfs4_destroy_callback(clp); |
288 | if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) | |
289 | nfs_idmap_delete(clp); | |
290 | ||
291 | rpc_destroy_wait_queue(&clp->cl_rpcwaitq); | |
292 | kfree(clp->cl_serverowner); | |
293 | kfree(clp->cl_serverscope); | |
294 | kfree(clp->cl_implid); | |
ceb3a16c | 295 | kfree(clp->cl_owner_id); |
ec409897 BS |
296 | } |
297 | ||
298 | void nfs4_free_client(struct nfs_client *clp) | |
299 | { | |
300 | nfs4_shutdown_client(clp); | |
301 | nfs_free_client(clp); | |
302 | } | |
303 | ||
428360d7 BS |
304 | /* |
305 | * Initialize the NFS4 callback service | |
306 | */ | |
307 | static int nfs4_init_callback(struct nfs_client *clp) | |
308 | { | |
c2ef47b7 | 309 | struct rpc_xprt *xprt; |
428360d7 BS |
310 | int error; |
311 | ||
c2ef47b7 | 312 | xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
428360d7 | 313 | |
c2ef47b7 CL |
314 | if (nfs4_has_session(clp)) { |
315 | error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
316 | if (error < 0) | |
428360d7 | 317 | return error; |
428360d7 | 318 | } |
c2ef47b7 CL |
319 | |
320 | error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); | |
321 | if (error < 0) { | |
322 | dprintk("%s: failed to start callback. Error = %d\n", | |
323 | __func__, error); | |
324 | return error; | |
325 | } | |
326 | __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); | |
327 | ||
428360d7 BS |
328 | return 0; |
329 | } | |
330 | ||
abf79bb3 CL |
331 | /** |
332 | * nfs40_init_client - nfs_client initialization tasks for NFSv4.0 | |
302fad7b | 333 | * @clp: nfs_client to initialize |
abf79bb3 CL |
334 | * |
335 | * Returns zero on success, or a negative errno if some error occurred. | |
336 | */ | |
337 | int nfs40_init_client(struct nfs_client *clp) | |
338 | { | |
339 | struct nfs4_slot_table *tbl; | |
340 | int ret; | |
341 | ||
342 | tbl = kzalloc(sizeof(*tbl), GFP_NOFS); | |
343 | if (tbl == NULL) | |
344 | return -ENOMEM; | |
345 | ||
346 | ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, | |
347 | "NFSv4.0 transport Slot table"); | |
348 | if (ret) { | |
7e843672 | 349 | nfs4_shutdown_slot_table(tbl); |
abf79bb3 CL |
350 | kfree(tbl); |
351 | return ret; | |
352 | } | |
353 | ||
354 | clp->cl_slot_tbl = tbl; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | #if defined(CONFIG_NFS_V4_1) | |
359 | ||
360 | /** | |
361 | * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ | |
302fad7b | 362 | * @clp: nfs_client to initialize |
abf79bb3 CL |
363 | * |
364 | * Returns zero on success, or a negative errno if some error occurred. | |
365 | */ | |
366 | int nfs41_init_client(struct nfs_client *clp) | |
367 | { | |
368 | struct nfs4_session *session = NULL; | |
369 | ||
370 | /* | |
371 | * Create the session and mark it expired. | |
372 | * When a SEQUENCE operation encounters the expired session | |
373 | * it will do session recovery to initialize it. | |
374 | */ | |
375 | session = nfs4_alloc_session(clp); | |
376 | if (!session) | |
377 | return -ENOMEM; | |
378 | ||
379 | clp->cl_session = session; | |
380 | ||
381 | /* | |
382 | * The create session reply races with the server back | |
383 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
384 | * so that the client back channel can find the | |
385 | * nfs_client struct | |
386 | */ | |
387 | nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); | |
388 | return 0; | |
389 | } | |
390 | ||
391 | #endif /* CONFIG_NFS_V4_1 */ | |
392 | ||
428360d7 BS |
393 | /* |
394 | * Initialize the minor version specific parts of an NFS4 client record | |
395 | */ | |
396 | static int nfs4_init_client_minor_version(struct nfs_client *clp) | |
397 | { | |
abf79bb3 | 398 | int ret; |
428360d7 | 399 | |
abf79bb3 CL |
400 | ret = clp->cl_mvops->init_client(clp); |
401 | if (ret) | |
402 | return ret; | |
428360d7 BS |
403 | return nfs4_init_callback(clp); |
404 | } | |
405 | ||
2a7a451a OK |
406 | static void nfs4_add_trunk(struct nfs_client *clp, struct nfs_client *old) |
407 | { | |
408 | struct sockaddr_storage clp_addr, old_addr; | |
409 | struct sockaddr *clp_sap = (struct sockaddr *)&clp_addr; | |
410 | struct sockaddr *old_sap = (struct sockaddr *)&old_addr; | |
411 | size_t clp_salen; | |
412 | struct xprt_create xprt_args = { | |
413 | .ident = old->cl_proto, | |
414 | .net = old->cl_net, | |
415 | .servername = old->cl_hostname, | |
416 | }; | |
417 | ||
418 | if (clp->cl_proto != old->cl_proto) | |
419 | return; | |
420 | clp_salen = rpc_peeraddr(clp->cl_rpcclient, clp_sap, sizeof(clp_addr)); | |
421 | rpc_peeraddr(old->cl_rpcclient, old_sap, sizeof(old_addr)); | |
422 | ||
423 | if (clp_addr.ss_family != old_addr.ss_family) | |
424 | return; | |
425 | ||
426 | xprt_args.dstaddr = clp_sap; | |
427 | xprt_args.addrlen = clp_salen; | |
428 | ||
429 | rpc_clnt_add_xprt(old->cl_rpcclient, &xprt_args, | |
430 | rpc_clnt_test_and_add_xprt, NULL); | |
431 | } | |
432 | ||
428360d7 BS |
433 | /** |
434 | * nfs4_init_client - Initialise an NFS4 client record | |
435 | * | |
436 | * @clp: nfs_client to initialise | |
302fad7b | 437 | * @cl_init: pointer to nfs_client_initdata |
428360d7 BS |
438 | * |
439 | * Returns pointer to an NFS client, or an ERR_PTR value. | |
440 | */ | |
441 | struct nfs_client *nfs4_init_client(struct nfs_client *clp, | |
5c6e5b60 | 442 | const struct nfs_client_initdata *cl_init) |
428360d7 | 443 | { |
05f4c350 | 444 | struct nfs_client *old; |
428360d7 BS |
445 | int error; |
446 | ||
4fe6b366 | 447 | if (clp->cl_cons_state == NFS_CS_READY) |
428360d7 | 448 | /* the client is initialised already */ |
428360d7 | 449 | return clp; |
428360d7 | 450 | |
428360d7 BS |
451 | error = nfs4_init_client_minor_version(clp); |
452 | if (error < 0) | |
453 | goto error; | |
454 | ||
05f4c350 CL |
455 | error = nfs4_discover_server_trunking(clp, &old); |
456 | if (error < 0) | |
457 | goto error; | |
05f4c350 | 458 | |
c156618e | 459 | if (clp != old) { |
abad2fa5 | 460 | clp->cl_preserve_clid = true; |
c156618e SM |
461 | /* |
462 | * Mark the client as having failed initialization so other | |
463 | * processes walking the nfs_client_list in nfs_match_client() | |
464 | * won't try to use it. | |
465 | */ | |
466 | nfs_mark_client_ready(clp, -EPERM); | |
2a7a451a OK |
467 | if (old->cl_mvops->session_trunk) |
468 | nfs4_add_trunk(clp, old); | |
c156618e | 469 | } |
8dcbec6d | 470 | clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
476bdb04 | 471 | nfs_put_client(clp); |
abad2fa5 | 472 | return old; |
428360d7 BS |
473 | |
474 | error: | |
475 | nfs_mark_client_ready(clp, error); | |
476 | nfs_put_client(clp); | |
428360d7 BS |
477 | return ERR_PTR(error); |
478 | } | |
fcf10398 | 479 | |
05f4c350 CL |
480 | /* |
481 | * SETCLIENTID just did a callback update with the callback ident in | |
482 | * "drop," but server trunking discovery claims "drop" and "keep" are | |
483 | * actually the same server. Swap the callback IDs so that "keep" | |
484 | * will continue to use the callback ident the server now knows about, | |
485 | * and so that "keep"'s original callback ident is destroyed when | |
486 | * "drop" is freed. | |
487 | */ | |
488 | static void nfs4_swap_callback_idents(struct nfs_client *keep, | |
489 | struct nfs_client *drop) | |
490 | { | |
491 | struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); | |
492 | unsigned int save = keep->cl_cb_ident; | |
493 | ||
494 | if (keep->cl_cb_ident == drop->cl_cb_ident) | |
495 | return; | |
496 | ||
497 | dprintk("%s: keeping callback ident %u and dropping ident %u\n", | |
498 | __func__, keep->cl_cb_ident, drop->cl_cb_ident); | |
499 | ||
500 | spin_lock(&nn->nfs_client_lock); | |
501 | ||
502 | idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); | |
503 | keep->cl_cb_ident = drop->cl_cb_ident; | |
504 | ||
505 | idr_replace(&nn->cb_ident_idr, drop, save); | |
506 | drop->cl_cb_ident = save; | |
507 | ||
508 | spin_unlock(&nn->nfs_client_lock); | |
509 | } | |
510 | ||
55b9df93 TM |
511 | static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
512 | const struct nfs_client *clp2) | |
513 | { | |
514 | if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) | |
515 | return true; | |
516 | return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; | |
517 | } | |
518 | ||
ced85a75 BF |
519 | static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
520 | { | |
521 | return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; | |
522 | } | |
523 | ||
14d1bbb0 AS |
524 | static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
525 | struct nfs_client **prev, struct nfs_net *nn) | |
526 | { | |
527 | int status; | |
528 | ||
529 | if (pos->rpc_ops != new->rpc_ops) | |
530 | return 1; | |
531 | ||
532 | if (pos->cl_minorversion != new->cl_minorversion) | |
533 | return 1; | |
534 | ||
535 | /* If "pos" isn't marked ready, we can't trust the | |
536 | * remaining fields in "pos", especially the client | |
537 | * ID and serverowner fields. Wait for CREATE_SESSION | |
538 | * to finish. */ | |
539 | if (pos->cl_cons_state > NFS_CS_READY) { | |
212bf41d | 540 | refcount_inc(&pos->cl_count); |
14d1bbb0 AS |
541 | spin_unlock(&nn->nfs_client_lock); |
542 | ||
543 | nfs_put_client(*prev); | |
544 | *prev = pos; | |
545 | ||
546 | status = nfs_wait_client_init_complete(pos); | |
547 | spin_lock(&nn->nfs_client_lock); | |
548 | ||
549 | if (status < 0) | |
550 | return status; | |
551 | } | |
552 | ||
553 | if (pos->cl_cons_state != NFS_CS_READY) | |
554 | return 1; | |
555 | ||
556 | if (pos->cl_clientid != new->cl_clientid) | |
557 | return 1; | |
558 | ||
559 | /* NFSv4.1 always uses the uniform string, however someone | |
560 | * might switch the uniquifier string on us. | |
561 | */ | |
562 | if (!nfs4_match_client_owner_id(pos, new)) | |
563 | return 1; | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
05f4c350 CL |
568 | /** |
569 | * nfs40_walk_client_list - Find server that recognizes a client ID | |
570 | * | |
571 | * @new: nfs_client with client ID to test | |
572 | * @result: OUT: found nfs_client, or new | |
573 | * @cred: credential to use for trunking test | |
574 | * | |
575 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
576 | * If zero is returned, an nfs_client pointer is planted in "result." | |
577 | * | |
578 | * NB: nfs40_walk_client_list() relies on the new nfs_client being | |
579 | * the last nfs_client on the list. | |
580 | */ | |
581 | int nfs40_walk_client_list(struct nfs_client *new, | |
582 | struct nfs_client **result, | |
a52458b4 | 583 | const struct cred *cred) |
05f4c350 CL |
584 | { |
585 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 586 | struct nfs_client *pos, *prev = NULL; |
05f4c350 CL |
587 | struct nfs4_setclientid_res clid = { |
588 | .clientid = new->cl_clientid, | |
589 | .confirm = new->cl_confirm, | |
590 | }; | |
4ae19c2d | 591 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
592 | |
593 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 594 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 595 | |
c156618e SM |
596 | if (pos == new) |
597 | goto found; | |
598 | ||
14d1bbb0 AS |
599 | status = nfs4_match_client(pos, new, &prev, nn); |
600 | if (status < 0) | |
601 | goto out_unlock; | |
602 | if (status != 0) | |
55b9df93 | 603 | continue; |
ced85a75 BF |
604 | /* |
605 | * We just sent a new SETCLIENTID, which should have | |
606 | * caused the server to return a new cl_confirm. So if | |
607 | * cl_confirm is the same, then this is a different | |
608 | * server that just returned the same cl_confirm by | |
609 | * coincidence: | |
610 | */ | |
611 | if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, | |
612 | &new->cl_confirm)) | |
613 | continue; | |
614 | /* | |
615 | * But if the cl_confirm's are different, then the only | |
616 | * way that a SETCLIENTID_CONFIRM to pos can succeed is | |
617 | * if new and pos point to the same server: | |
618 | */ | |
c156618e | 619 | found: |
212bf41d | 620 | refcount_inc(&pos->cl_count); |
05f4c350 CL |
621 | spin_unlock(&nn->nfs_client_lock); |
622 | ||
fe0bf118 | 623 | nfs_put_client(prev); |
4ae19c2d | 624 | prev = pos; |
05f4c350 CL |
625 | |
626 | status = nfs4_proc_setclientid_confirm(pos, &clid, cred); | |
4ae19c2d TM |
627 | switch (status) { |
628 | case -NFS4ERR_STALE_CLIENTID: | |
629 | break; | |
630 | case 0: | |
05f4c350 | 631 | nfs4_swap_callback_idents(pos, new); |
ced85a75 | 632 | pos->cl_confirm = new->cl_confirm; |
c156618e | 633 | nfs_mark_client_ready(pos, NFS_CS_READY); |
05f4c350 | 634 | |
4ae19c2d | 635 | prev = NULL; |
05f4c350 | 636 | *result = pos; |
f9b7ebdf TM |
637 | goto out; |
638 | case -ERESTARTSYS: | |
639 | case -ETIMEDOUT: | |
640 | /* The callback path may have been inadvertently | |
641 | * changed. Schedule recovery! | |
642 | */ | |
643 | nfs4_schedule_path_down_recovery(pos); | |
ffb81717 | 644 | goto out; |
4ae19c2d TM |
645 | default: |
646 | goto out; | |
05f4c350 CL |
647 | } |
648 | ||
649 | spin_lock(&nn->nfs_client_lock); | |
05f4c350 | 650 | } |
14d1bbb0 | 651 | out_unlock: |
4ae19c2d | 652 | spin_unlock(&nn->nfs_client_lock); |
05f4c350 | 653 | |
202c312d | 654 | /* No match found. The server lost our clientid */ |
4ae19c2d | 655 | out: |
fe0bf118 | 656 | nfs_put_client(prev); |
4ae19c2d | 657 | return status; |
05f4c350 CL |
658 | } |
659 | ||
660 | #ifdef CONFIG_NFS_V4_1 | |
661 | /* | |
1fc0703a | 662 | * Returns true if the server major ids match |
05f4c350 | 663 | */ |
0491567b | 664 | bool |
e7b7cbf6 AA |
665 | nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
666 | struct nfs41_server_owner *o2) | |
05f4c350 | 667 | { |
05f4c350 | 668 | if (o1->major_id_sz != o2->major_id_sz) |
ddfa0d48 AS |
669 | return false; |
670 | return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; | |
05f4c350 CL |
671 | } |
672 | ||
ba84db96 AA |
673 | /* |
674 | * Returns true if the server scopes match | |
675 | */ | |
676 | static bool | |
677 | nfs4_check_server_scope(struct nfs41_server_scope *s1, | |
678 | struct nfs41_server_scope *s2) | |
679 | { | |
680 | if (s1->server_scope_sz != s2->server_scope_sz) | |
8da0f934 AS |
681 | return false; |
682 | return memcmp(s1->server_scope, s2->server_scope, | |
683 | s1->server_scope_sz) == 0; | |
ba84db96 AA |
684 | } |
685 | ||
686 | /** | |
ad0849a7 | 687 | * nfs4_detect_session_trunking - Checks for session trunking. |
ba84db96 AA |
688 | * @clp: original mount nfs_client |
689 | * @res: result structure from an exchange_id using the original mount | |
690 | * nfs_client with a new multi_addr transport | |
302fad7b TM |
691 | * @xprt: pointer to the transport to add. |
692 | * | |
693 | * Called after a successful EXCHANGE_ID on a multi-addr connection. | |
694 | * Upon success, add the transport. | |
ba84db96 AA |
695 | * |
696 | * Returns zero on success, otherwise -EINVAL | |
697 | * | |
698 | * Note: since the exchange_id for the new multi_addr transport uses the | |
699 | * same nfs_client from the original mount, the cl_owner_id is reused, | |
700 | * so eir_clientowner is the same. | |
701 | */ | |
702 | int nfs4_detect_session_trunking(struct nfs_client *clp, | |
703 | struct nfs41_exchange_id_res *res, | |
704 | struct rpc_xprt *xprt) | |
705 | { | |
706 | /* Check eir_clientid */ | |
f251fd9e | 707 | if (clp->cl_clientid != res->clientid) |
ba84db96 AA |
708 | goto out_err; |
709 | ||
710 | /* Check eir_server_owner so_major_id */ | |
711 | if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, | |
712 | res->server_owner)) | |
713 | goto out_err; | |
714 | ||
715 | /* Check eir_server_owner so_minor_id */ | |
5b6d3ff6 | 716 | if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
ba84db96 AA |
717 | goto out_err; |
718 | ||
719 | /* Check eir_server_scope */ | |
720 | if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) | |
721 | goto out_err; | |
722 | ||
723 | pr_info("NFS: %s: Session trunking succeeded for %s\n", | |
724 | clp->cl_hostname, | |
725 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
726 | ||
727 | return 0; | |
728 | out_err: | |
729 | pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, | |
730 | xprt->address_strings[RPC_DISPLAY_ADDR]); | |
731 | ||
732 | return -EINVAL; | |
733 | } | |
734 | ||
05f4c350 CL |
735 | /** |
736 | * nfs41_walk_client_list - Find nfs_client that matches a client/server owner | |
737 | * | |
738 | * @new: nfs_client with client ID to test | |
739 | * @result: OUT: found nfs_client, or new | |
740 | * @cred: credential to use for trunking test | |
741 | * | |
742 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
743 | * If zero is returned, an nfs_client pointer is planted in "result." | |
744 | * | |
745 | * NB: nfs41_walk_client_list() relies on the new nfs_client being | |
746 | * the last nfs_client on the list. | |
747 | */ | |
748 | int nfs41_walk_client_list(struct nfs_client *new, | |
749 | struct nfs_client **result, | |
a52458b4 | 750 | const struct cred *cred) |
05f4c350 CL |
751 | { |
752 | struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); | |
7b1f1fd1 | 753 | struct nfs_client *pos, *prev = NULL; |
202c312d | 754 | int status = -NFS4ERR_STALE_CLIENTID; |
05f4c350 CL |
755 | |
756 | spin_lock(&nn->nfs_client_lock); | |
7b1f1fd1 | 757 | list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
080af20c | 758 | |
48d66b97 TM |
759 | if (pos == new) |
760 | goto found; | |
761 | ||
14d1bbb0 AS |
762 | status = nfs4_match_client(pos, new, &prev, nn); |
763 | if (status < 0) | |
764 | goto out; | |
765 | if (status != 0) | |
05f4c350 CL |
766 | continue; |
767 | ||
1fc0703a TM |
768 | /* |
769 | * Note that session trunking is just a special subcase of | |
770 | * client id trunking. In either case, we want to fall back | |
771 | * to using the existing nfs_client. | |
772 | */ | |
e7b7cbf6 AA |
773 | if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
774 | new->cl_serverowner)) | |
05f4c350 CL |
775 | continue; |
776 | ||
48d66b97 | 777 | found: |
212bf41d | 778 | refcount_inc(&pos->cl_count); |
7b1f1fd1 | 779 | *result = pos; |
eb04e0ac | 780 | status = 0; |
7b1f1fd1 | 781 | break; |
05f4c350 CL |
782 | } |
783 | ||
14d1bbb0 | 784 | out: |
05f4c350 | 785 | spin_unlock(&nn->nfs_client_lock); |
fe0bf118 | 786 | nfs_put_client(prev); |
202c312d | 787 | return status; |
05f4c350 CL |
788 | } |
789 | #endif /* CONFIG_NFS_V4_1 */ | |
790 | ||
fcf10398 BS |
791 | static void nfs4_destroy_server(struct nfs_server *server) |
792 | { | |
c77e2283 TM |
793 | LIST_HEAD(freeme); |
794 | ||
fcf10398 BS |
795 | nfs_server_return_all_delegations(server); |
796 | unset_pnfs_layoutdriver(server); | |
c77e2283 TM |
797 | nfs4_purge_state_owners(server, &freeme); |
798 | nfs4_free_state_owners(&freeme); | |
fcf10398 BS |
799 | } |
800 | ||
801 | /* | |
802 | * NFSv4.0 callback thread helper | |
803 | * | |
804 | * Find a client by callback identifier | |
805 | */ | |
806 | struct nfs_client * | |
807 | nfs4_find_client_ident(struct net *net, int cb_ident) | |
808 | { | |
809 | struct nfs_client *clp; | |
810 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
811 | ||
812 | spin_lock(&nn->nfs_client_lock); | |
813 | clp = idr_find(&nn->cb_ident_idr, cb_ident); | |
814 | if (clp) | |
212bf41d | 815 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
816 | spin_unlock(&nn->nfs_client_lock); |
817 | return clp; | |
818 | } | |
819 | ||
820 | #if defined(CONFIG_NFS_V4_1) | |
821 | /* Common match routine for v4.0 and v4.1 callback services */ | |
822 | static bool nfs4_cb_match_client(const struct sockaddr *addr, | |
823 | struct nfs_client *clp, u32 minorversion) | |
824 | { | |
825 | struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; | |
826 | ||
827 | /* Don't match clients that failed to initialise */ | |
828 | if (!(clp->cl_cons_state == NFS_CS_READY || | |
829 | clp->cl_cons_state == NFS_CS_SESSION_INITING)) | |
830 | return false; | |
831 | ||
832 | smp_rmb(); | |
833 | ||
834 | /* Match the version and minorversion */ | |
835 | if (clp->rpc_ops->version != 4 || | |
836 | clp->cl_minorversion != minorversion) | |
837 | return false; | |
838 | ||
839 | /* Match only the IP address, not the port number */ | |
d8efa4e6 | 840 | return rpc_cmp_addr(addr, clap); |
fcf10398 BS |
841 | } |
842 | ||
843 | /* | |
844 | * NFSv4.1 callback thread helper | |
845 | * For CB_COMPOUND calls, find a client by IP address, protocol version, | |
846 | * minorversion, and sessionID | |
847 | * | |
848 | * Returns NULL if no such client | |
849 | */ | |
850 | struct nfs_client * | |
851 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 852 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
853 | { |
854 | struct nfs_client *clp; | |
855 | struct nfs_net *nn = net_generic(net, nfs_net_id); | |
856 | ||
857 | spin_lock(&nn->nfs_client_lock); | |
858 | list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { | |
6089dd0d | 859 | if (!nfs4_cb_match_client(addr, clp, minorversion)) |
fcf10398 BS |
860 | continue; |
861 | ||
862 | if (!nfs4_has_session(clp)) | |
863 | continue; | |
864 | ||
865 | /* Match sessionid*/ | |
866 | if (memcmp(clp->cl_session->sess_id.data, | |
867 | sid->data, NFS4_MAX_SESSIONID_LEN) != 0) | |
868 | continue; | |
869 | ||
212bf41d | 870 | refcount_inc(&clp->cl_count); |
fcf10398 BS |
871 | spin_unlock(&nn->nfs_client_lock); |
872 | return clp; | |
873 | } | |
874 | spin_unlock(&nn->nfs_client_lock); | |
875 | return NULL; | |
876 | } | |
877 | ||
878 | #else /* CONFIG_NFS_V4_1 */ | |
879 | ||
880 | struct nfs_client * | |
881 | nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, | |
459de2ed | 882 | struct nfs4_sessionid *sid, u32 minorversion) |
fcf10398 BS |
883 | { |
884 | return NULL; | |
885 | } | |
886 | #endif /* CONFIG_NFS_V4_1 */ | |
887 | ||
888 | /* | |
889 | * Set up an NFS4 client | |
890 | */ | |
891 | static int nfs4_set_client(struct nfs_server *server, | |
892 | const char *hostname, | |
cf0d7e7f | 893 | const struct sockaddr_storage *addr, |
fcf10398 BS |
894 | const size_t addrlen, |
895 | const char *ip_addr, | |
fcf10398 | 896 | int proto, const struct rpc_timeout *timeparms, |
6619079d | 897 | u32 minorversion, unsigned int nconnect, |
7e134205 | 898 | unsigned int max_connect, |
6619079d | 899 | struct net *net) |
fcf10398 BS |
900 | { |
901 | struct nfs_client_initdata cl_init = { | |
902 | .hostname = hostname, | |
903 | .addr = addr, | |
904 | .addrlen = addrlen, | |
5c6e5b60 | 905 | .ip_addr = ip_addr, |
ab7017a3 | 906 | .nfs_mod = &nfs_v4, |
fcf10398 BS |
907 | .proto = proto, |
908 | .minorversion = minorversion, | |
909 | .net = net, | |
5c6e5b60 | 910 | .timeparms = timeparms, |
1a58e8a0 | 911 | .cred = server->cred, |
fcf10398 BS |
912 | }; |
913 | struct nfs_client *clp; | |
fcf10398 | 914 | |
e6237b6f TM |
915 | if (minorversion == 0) |
916 | __set_bit(NFS_CS_REUSEPORT, &cl_init.init_flags); | |
7e134205 OK |
917 | else |
918 | cl_init.max_connect = max_connect; | |
dbc4fec6 | 919 | if (proto == XPRT_TRANSPORT_TCP) |
6619079d | 920 | cl_init.nconnect = nconnect; |
e6237b6f | 921 | |
fcf10398 | 922 | if (server->flags & NFS_MOUNT_NORESVPORT) |
d0372b67 | 923 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
f112bb48 | 924 | if (server->options & NFS_OPTION_MIGRATION) |
d0372b67 | 925 | __set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); |
8dcbec6d | 926 | if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
d0372b67 | 927 | __set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); |
cf0d7e7f | 928 | server->port = rpc_get_port((struct sockaddr *)addr); |
fcf10398 BS |
929 | |
930 | /* Allocate or find a client reference we can use */ | |
7d38de3f | 931 | clp = nfs_get_client(&cl_init); |
2dc42c0d AS |
932 | if (IS_ERR(clp)) |
933 | return PTR_ERR(clp); | |
fcf10398 | 934 | |
ad86f605 BB |
935 | if (server->nfs_client == clp) { |
936 | nfs_put_client(clp); | |
2dc42c0d | 937 | return -ELOOP; |
ad86f605 | 938 | } |
52442f9b | 939 | |
fcf10398 BS |
940 | /* |
941 | * Query for the lease time on clientid setup or renewal | |
942 | * | |
943 | * Note that this will be set on nfs_clients that were created | |
944 | * only for the DS role and did not set this bit, but now will | |
945 | * serve a dual role. | |
946 | */ | |
947 | set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); | |
948 | ||
949 | server->nfs_client = clp; | |
fcf10398 | 950 | return 0; |
fcf10398 BS |
951 | } |
952 | ||
953 | /* | |
954 | * Set up a pNFS Data Server client. | |
955 | * | |
956 | * Return any existing nfs_client that matches server address,port,version | |
957 | * and minorversion. | |
958 | * | |
959 | * For a new nfs_client, use a soft mount (default), a low retrans and a | |
960 | * low timeout interval so that if a connection is lost, we retry through | |
961 | * the MDS. | |
962 | */ | |
3fc75f12 | 963 | struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv, |
cf0d7e7f | 964 | const struct sockaddr_storage *ds_addr, int ds_addrlen, |
064172f3 | 965 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
7d38de3f | 966 | u32 minor_version) |
fcf10398 | 967 | { |
5c6e5b60 | 968 | struct rpc_timeout ds_timeout; |
3fc75f12 | 969 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
fcf10398 BS |
970 | struct nfs_client_initdata cl_init = { |
971 | .addr = ds_addr, | |
972 | .addrlen = ds_addrlen, | |
5c6e5b60 TM |
973 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
974 | .ip_addr = mds_clp->cl_ipaddr, | |
ab7017a3 | 975 | .nfs_mod = &nfs_v4, |
fcf10398 | 976 | .proto = ds_proto, |
30626f9c | 977 | .minorversion = minor_version, |
fcf10398 | 978 | .net = mds_clp->cl_net, |
5c6e5b60 | 979 | .timeparms = &ds_timeout, |
1a58e8a0 | 980 | .cred = mds_srv->cred, |
fcf10398 | 981 | }; |
a363e32e PT |
982 | char buf[INET6_ADDRSTRLEN + 1]; |
983 | ||
cf0d7e7f | 984 | if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0) |
a363e32e PT |
985 | return ERR_PTR(-EINVAL); |
986 | cl_init.hostname = buf; | |
fcf10398 | 987 | |
7e134205 | 988 | if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP) { |
bb71e4a5 | 989 | cl_init.nconnect = mds_clp->cl_nconnect; |
7e134205 OK |
990 | cl_init.max_connect = NFS_MAX_TRANSPORTS; |
991 | } | |
bb71e4a5 | 992 | |
3fc75f12 TM |
993 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
994 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); | |
995 | ||
fcf10398 BS |
996 | /* |
997 | * Set an authflavor equual to the MDS value. Use the MDS nfs_client | |
998 | * cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS | |
999 | * (section 13.1 RFC 5661). | |
1000 | */ | |
1001 | nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); | |
4fe6b366 | 1002 | return nfs_get_client(&cl_init); |
fcf10398 BS |
1003 | } |
1004 | EXPORT_SYMBOL_GPL(nfs4_set_ds_client); | |
1005 | ||
1006 | /* | |
1007 | * Session has been established, and the client marked ready. | |
943cff67 TM |
1008 | * Limit the mount rsize, wsize and dtsize using negotiated fore |
1009 | * channel attributes. | |
fcf10398 | 1010 | */ |
943cff67 | 1011 | static void nfs4_session_limit_rwsize(struct nfs_server *server) |
fcf10398 BS |
1012 | { |
1013 | #ifdef CONFIG_NFS_V4_1 | |
1014 | struct nfs4_session *sess; | |
1015 | u32 server_resp_sz; | |
1016 | u32 server_rqst_sz; | |
1017 | ||
1018 | if (!nfs4_has_session(server->nfs_client)) | |
1019 | return; | |
1020 | sess = server->nfs_client->cl_session; | |
1021 | server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; | |
1022 | server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; | |
1023 | ||
943cff67 TM |
1024 | if (server->dtsize > server_resp_sz) |
1025 | server->dtsize = server_resp_sz; | |
1026 | if (server->rsize > server_resp_sz) | |
fcf10398 | 1027 | server->rsize = server_resp_sz; |
943cff67 | 1028 | if (server->wsize > server_rqst_sz) |
fcf10398 BS |
1029 | server->wsize = server_rqst_sz; |
1030 | #endif /* CONFIG_NFS_V4_1 */ | |
1031 | } | |
1032 | ||
04a5da69 FL |
1033 | /* |
1034 | * Limit xattr sizes using the channel attributes. | |
1035 | */ | |
1036 | static void nfs4_session_limit_xasize(struct nfs_server *server) | |
1037 | { | |
1038 | #ifdef CONFIG_NFS_V4_2 | |
1039 | struct nfs4_session *sess; | |
1040 | u32 server_gxa_sz; | |
1041 | u32 server_sxa_sz; | |
1042 | u32 server_lxa_sz; | |
1043 | ||
1044 | if (!nfs4_has_session(server->nfs_client)) | |
1045 | return; | |
1046 | ||
1047 | sess = server->nfs_client->cl_session; | |
1048 | ||
1049 | server_gxa_sz = sess->fc_attrs.max_resp_sz - nfs42_maxgetxattr_overhead; | |
1050 | server_sxa_sz = sess->fc_attrs.max_rqst_sz - nfs42_maxsetxattr_overhead; | |
1051 | server_lxa_sz = sess->fc_attrs.max_resp_sz - | |
1052 | nfs42_maxlistxattrs_overhead; | |
1053 | ||
1054 | if (server->gxasize > server_gxa_sz) | |
1055 | server->gxasize = server_gxa_sz; | |
1056 | if (server->sxasize > server_sxa_sz) | |
1057 | server->sxasize = server_sxa_sz; | |
1058 | if (server->lxasize > server_lxa_sz) | |
1059 | server->lxasize = server_lxa_sz; | |
1060 | #endif | |
1061 | } | |
1062 | ||
01dde76e AS |
1063 | void nfs4_server_set_init_caps(struct nfs_server *server) |
1064 | { | |
1065 | /* Set the basic capabilities */ | |
1066 | server->caps |= server->nfs_client->cl_mvops->init_caps; | |
1067 | if (server->flags & NFS_MOUNT_NORDIRPLUS) | |
1068 | server->caps &= ~NFS_CAP_READDIRPLUS; | |
1069 | if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) | |
1070 | server->caps &= ~NFS_CAP_READ_PLUS; | |
1071 | ||
1072 | /* | |
1073 | * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower | |
1074 | * authentication. | |
1075 | */ | |
1076 | if (nfs4_disable_idmapping && | |
1077 | server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) | |
1078 | server->caps |= NFS_CAP_UIDGID_NOMAP; | |
1079 | } | |
1080 | ||
fcf10398 | 1081 | static int nfs4_server_common_setup(struct nfs_server *server, |
5e6b1990 | 1082 | struct nfs_fh *mntfh, bool auth_probe) |
fcf10398 | 1083 | { |
fcf10398 BS |
1084 | int error; |
1085 | ||
fcf10398 BS |
1086 | /* data servers support only a subset of NFSv4.1 */ |
1087 | if (is_ds_only_client(server->nfs_client)) | |
1088 | return -EPROTONOSUPPORT; | |
1089 | ||
fcf10398 | 1090 | /* We must ensure the session is initialised first */ |
18aad3d5 | 1091 | error = nfs4_init_session(server->nfs_client); |
fcf10398 BS |
1092 | if (error < 0) |
1093 | goto out; | |
1094 | ||
01dde76e | 1095 | nfs4_server_set_init_caps(server); |
39c6daae | 1096 | |
fcf10398 | 1097 | /* Probe the root fh to retrieve its FSID and filehandle */ |
5e6b1990 | 1098 | error = nfs4_get_rootfh(server, mntfh, auth_probe); |
fcf10398 BS |
1099 | if (error < 0) |
1100 | goto out; | |
1101 | ||
1102 | dprintk("Server FSID: %llx:%llx\n", | |
1103 | (unsigned long long) server->fsid.major, | |
1104 | (unsigned long long) server->fsid.minor); | |
9e6ee76d | 1105 | nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
fcf10398 | 1106 | |
4d4cf8d2 | 1107 | error = nfs_probe_server(server, mntfh); |
fcf10398 BS |
1108 | if (error < 0) |
1109 | goto out; | |
1110 | ||
943cff67 | 1111 | nfs4_session_limit_rwsize(server); |
04a5da69 | 1112 | nfs4_session_limit_xasize(server); |
943cff67 | 1113 | |
fcf10398 BS |
1114 | if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
1115 | server->namelen = NFS4_MAXNAMLEN; | |
1116 | ||
1117 | nfs_server_insert_lists(server); | |
1118 | server->mount_time = jiffies; | |
1119 | server->destroy = nfs4_destroy_server; | |
1120 | out: | |
fcf10398 BS |
1121 | return error; |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Create a version 4 volume record | |
1126 | */ | |
62a55d08 | 1127 | static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) |
fcf10398 | 1128 | { |
62a55d08 | 1129 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 BS |
1130 | struct rpc_timeout timeparms; |
1131 | int error; | |
1132 | ||
5eb005ca DH |
1133 | nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
1134 | ctx->timeo, ctx->retrans); | |
fcf10398 BS |
1135 | |
1136 | /* Initialise the client representation from the mount data */ | |
5eb005ca DH |
1137 | server->flags = ctx->flags; |
1138 | server->options = ctx->options; | |
1139 | server->auth_info = ctx->auth_info; | |
fcf10398 | 1140 | |
4d4b69dd WAA |
1141 | /* Use the first specified auth flavor. If this flavor isn't |
1142 | * allowed by the server, use the SECINFO path to try the | |
1143 | * other specified flavors */ | |
5eb005ca DH |
1144 | if (ctx->auth_info.flavor_len >= 1) |
1145 | ctx->selected_flavor = ctx->auth_info.flavors[0]; | |
a3f73c27 | 1146 | else |
5eb005ca | 1147 | ctx->selected_flavor = RPC_AUTH_UNIX; |
5e6b1990 | 1148 | |
fcf10398 BS |
1149 | /* Get a client record */ |
1150 | error = nfs4_set_client(server, | |
62a55d08 | 1151 | ctx->nfs_server.hostname, |
cf0d7e7f | 1152 | &ctx->nfs_server._address, |
62a55d08 SM |
1153 | ctx->nfs_server.addrlen, |
1154 | ctx->client_address, | |
1155 | ctx->nfs_server.protocol, | |
1156 | &timeparms, | |
1157 | ctx->minorversion, | |
1158 | ctx->nfs_server.nconnect, | |
7e134205 | 1159 | ctx->nfs_server.max_connect, |
62a55d08 | 1160 | fc->net_ns); |
fcf10398 | 1161 | if (error < 0) |
1073d9b4 | 1162 | return error; |
fcf10398 | 1163 | |
5eb005ca | 1164 | if (ctx->rsize) |
940261a1 | 1165 | server->rsize = nfs_io_size(ctx->rsize, server->nfs_client->cl_proto); |
5eb005ca | 1166 | if (ctx->wsize) |
940261a1 | 1167 | server->wsize = nfs_io_size(ctx->wsize, server->nfs_client->cl_proto); |
fcf10398 | 1168 | |
5eb005ca DH |
1169 | server->acregmin = ctx->acregmin * HZ; |
1170 | server->acregmax = ctx->acregmax * HZ; | |
1171 | server->acdirmin = ctx->acdirmin * HZ; | |
1172 | server->acdirmax = ctx->acdirmax * HZ; | |
1173 | server->port = ctx->nfs_server.port; | |
fcf10398 | 1174 | |
1073d9b4 | 1175 | return nfs_init_server_rpcclient(server, &timeparms, |
5eb005ca | 1176 | ctx->selected_flavor); |
fcf10398 BS |
1177 | } |
1178 | ||
1179 | /* | |
1180 | * Create a version 4 volume record | |
1181 | * - keyed on server and FSID | |
1182 | */ | |
62a55d08 | 1183 | struct nfs_server *nfs4_create_server(struct fs_context *fc) |
fcf10398 | 1184 | { |
62a55d08 | 1185 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 | 1186 | struct nfs_server *server; |
5e6b1990 | 1187 | bool auth_probe; |
fcf10398 BS |
1188 | int error; |
1189 | ||
fcf10398 BS |
1190 | server = nfs_alloc_server(); |
1191 | if (!server) | |
1192 | return ERR_PTR(-ENOMEM); | |
1193 | ||
d3ff46fe | 1194 | server->cred = get_cred(fc->cred); |
1a58e8a0 | 1195 | |
62a55d08 | 1196 | auth_probe = ctx->auth_info.flavor_len < 1; |
5e6b1990 | 1197 | |
fcf10398 | 1198 | /* set up the general RPC client */ |
62a55d08 | 1199 | error = nfs4_init_server(server, fc); |
fcf10398 BS |
1200 | if (error < 0) |
1201 | goto error; | |
1202 | ||
62a55d08 | 1203 | error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
fcf10398 BS |
1204 | if (error < 0) |
1205 | goto error; | |
1206 | ||
fcf10398 BS |
1207 | return server; |
1208 | ||
1209 | error: | |
1210 | nfs_free_server(server); | |
fcf10398 BS |
1211 | return ERR_PTR(error); |
1212 | } | |
1213 | ||
1214 | /* | |
1215 | * Create an NFS4 referral server record | |
1216 | */ | |
62a55d08 | 1217 | struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) |
fcf10398 | 1218 | { |
62a55d08 | 1219 | struct nfs_fs_context *ctx = nfs_fc2context(fc); |
fcf10398 BS |
1220 | struct nfs_client *parent_client; |
1221 | struct nfs_server *server, *parent_server; | |
5837f6df | 1222 | bool auth_probe; |
fcf10398 BS |
1223 | int error; |
1224 | ||
fcf10398 BS |
1225 | server = nfs_alloc_server(); |
1226 | if (!server) | |
1227 | return ERR_PTR(-ENOMEM); | |
1228 | ||
62a55d08 | 1229 | parent_server = NFS_SB(ctx->clone_data.sb); |
fcf10398 BS |
1230 | parent_client = parent_server->nfs_client; |
1231 | ||
1a58e8a0 TM |
1232 | server->cred = get_cred(parent_server->cred); |
1233 | ||
fcf10398 BS |
1234 | /* Initialise the client representation from the parent server */ |
1235 | nfs_server_copy_userdata(server, parent_server); | |
fcf10398 | 1236 | |
530ea421 | 1237 | /* Get a client representation */ |
23a88ade | 1238 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
62a55d08 SM |
1239 | rpc_set_port(&ctx->nfs_server.address, NFS_RDMA_PORT); |
1240 | error = nfs4_set_client(server, | |
1241 | ctx->nfs_server.hostname, | |
cf0d7e7f | 1242 | &ctx->nfs_server._address, |
62a55d08 | 1243 | ctx->nfs_server.addrlen, |
fcf10398 | 1244 | parent_client->cl_ipaddr, |
530ea421 CL |
1245 | XPRT_TRANSPORT_RDMA, |
1246 | parent_server->client->cl_timeout, | |
1247 | parent_client->cl_mvops->minor_version, | |
6619079d | 1248 | parent_client->cl_nconnect, |
7e134205 | 1249 | parent_client->cl_max_connect, |
530ea421 CL |
1250 | parent_client->cl_net); |
1251 | if (!error) | |
1252 | goto init_server; | |
23a88ade | 1253 | #endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ |
530ea421 | 1254 | |
62a55d08 SM |
1255 | rpc_set_port(&ctx->nfs_server.address, NFS_PORT); |
1256 | error = nfs4_set_client(server, | |
1257 | ctx->nfs_server.hostname, | |
cf0d7e7f | 1258 | &ctx->nfs_server._address, |
62a55d08 | 1259 | ctx->nfs_server.addrlen, |
530ea421 CL |
1260 | parent_client->cl_ipaddr, |
1261 | XPRT_TRANSPORT_TCP, | |
fcf10398 BS |
1262 | parent_server->client->cl_timeout, |
1263 | parent_client->cl_mvops->minor_version, | |
6619079d | 1264 | parent_client->cl_nconnect, |
7e134205 | 1265 | parent_client->cl_max_connect, |
fcf10398 BS |
1266 | parent_client->cl_net); |
1267 | if (error < 0) | |
1268 | goto error; | |
1269 | ||
23a88ade | 1270 | #if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
530ea421 CL |
1271 | init_server: |
1272 | #endif | |
62a55d08 SM |
1273 | error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, |
1274 | ctx->selected_flavor); | |
fcf10398 BS |
1275 | if (error < 0) |
1276 | goto error; | |
1277 | ||
5837f6df WAA |
1278 | auth_probe = parent_server->auth_info.flavor_len < 1; |
1279 | ||
62a55d08 | 1280 | error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
fcf10398 BS |
1281 | if (error < 0) |
1282 | goto error; | |
1283 | ||
fcf10398 BS |
1284 | return server; |
1285 | ||
1286 | error: | |
1287 | nfs_free_server(server); | |
fcf10398 BS |
1288 | return ERR_PTR(error); |
1289 | } | |
32e62b7c | 1290 | |
32e62b7c CL |
1291 | /** |
1292 | * nfs4_update_server - Move an nfs_server to a different nfs_client | |
1293 | * | |
1294 | * @server: represents FSID to be moved | |
1295 | * @hostname: new end-point's hostname | |
1296 | * @sap: new end-point's socket address | |
1297 | * @salen: size of "sap" | |
292f503c | 1298 | * @net: net namespace |
32e62b7c CL |
1299 | * |
1300 | * The nfs_server must be quiescent before this function is invoked. | |
1301 | * Either its session is drained (NFSv4.1+), or its transport is | |
1302 | * plugged and drained (NFSv4.0). | |
1303 | * | |
1304 | * Returns zero on success, or a negative errno value. | |
1305 | */ | |
1306 | int nfs4_update_server(struct nfs_server *server, const char *hostname, | |
cf0d7e7f | 1307 | struct sockaddr_storage *sap, size_t salen, struct net *net) |
32e62b7c CL |
1308 | { |
1309 | struct nfs_client *clp = server->nfs_client; | |
1310 | struct rpc_clnt *clnt = server->client; | |
1311 | struct xprt_create xargs = { | |
1312 | .ident = clp->cl_proto, | |
292f503c | 1313 | .net = net, |
cf0d7e7f | 1314 | .dstaddr = (struct sockaddr *)sap, |
32e62b7c CL |
1315 | .addrlen = salen, |
1316 | .servername = hostname, | |
1317 | }; | |
1318 | char buf[INET6_ADDRSTRLEN + 1]; | |
1319 | struct sockaddr_storage address; | |
1320 | struct sockaddr *localaddr = (struct sockaddr *)&address; | |
1321 | int error; | |
1322 | ||
32e62b7c | 1323 | error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
4fe6b366 AS |
1324 | if (error != 0) |
1325 | return error; | |
32e62b7c CL |
1326 | |
1327 | error = rpc_localaddr(clnt, localaddr, sizeof(address)); | |
4fe6b366 AS |
1328 | if (error != 0) |
1329 | return error; | |
32e62b7c | 1330 | |
4fe6b366 AS |
1331 | if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
1332 | return -EAFNOSUPPORT; | |
32e62b7c CL |
1333 | |
1334 | nfs_server_remove_lists(server); | |
8dcbec6d | 1335 | set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c | 1336 | error = nfs4_set_client(server, hostname, sap, salen, buf, |
32e62b7c | 1337 | clp->cl_proto, clnt->cl_timeout, |
6619079d | 1338 | clp->cl_minorversion, |
7e134205 | 1339 | clp->cl_nconnect, clp->cl_max_connect, net); |
8dcbec6d | 1340 | clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
32e62b7c CL |
1341 | if (error != 0) { |
1342 | nfs_server_insert_lists(server); | |
4fe6b366 | 1343 | return error; |
32e62b7c | 1344 | } |
ad86f605 | 1345 | nfs_put_client(clp); |
32e62b7c | 1346 | |
fbd2057e | 1347 | if (server->nfs_client->cl_hostname == NULL) { |
32e62b7c | 1348 | server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); |
fbd2057e XW |
1349 | if (server->nfs_client->cl_hostname == NULL) |
1350 | return -ENOMEM; | |
1351 | } | |
32e62b7c CL |
1352 | nfs_server_insert_lists(server); |
1353 | ||
e5731131 | 1354 | return nfs_probe_server(server, NFS_FH(d_inode(server->super->s_root))); |
32e62b7c | 1355 | } |