Commit | Line | Data |
---|---|---|
16b374ca AA |
1 | /* |
2 | * Device operations for the pnfs nfs4 file layout driver. | |
3 | * | |
4 | * Copyright (c) 2002 | |
5 | * The Regents of the University of Michigan | |
6 | * All Rights Reserved | |
7 | * | |
8 | * Dean Hildebrand <dhildebz@umich.edu> | |
9 | * Garth Goodson <Garth.Goodson@netapp.com> | |
10 | * | |
11 | * Permission is granted to use, copy, create derivative works, and | |
12 | * redistribute this software and such derivative works for any purpose, | |
13 | * so long as the name of the University of Michigan is not used in | |
14 | * any advertising or publicity pertaining to the use or distribution | |
15 | * of this software without specific, written prior authorization. If | |
16 | * the above copyright notice or any other identification of the | |
17 | * University of Michigan is included in any copy of any portion of | |
18 | * this software, then the disclaimer below must also be included. | |
19 | * | |
20 | * This software is provided as is, without representation or warranty | |
21 | * of any kind either express or implied, including without limitation | |
22 | * the implied warranties of merchantability, fitness for a particular | |
23 | * purpose, or noninfringement. The Regents of the University of | |
24 | * Michigan shall not be liable for any damages, including special, | |
25 | * indirect, incidental, or consequential damages, with respect to any | |
26 | * claim arising out of or in connection with the use of the software, | |
27 | * even if it has been or is hereafter advised of the possibility of | |
28 | * such damages. | |
29 | */ | |
30 | ||
31 | #include <linux/nfs_fs.h> | |
32 | #include <linux/vmalloc.h> | |
98fc685a | 33 | #include <linux/module.h> |
16b374ca AA |
34 | |
35 | #include "internal.h" | |
36 | #include "nfs4filelayout.h" | |
37 | ||
38 | #define NFSDBG_FACILITY NFSDBG_PNFS_LD | |
39 | ||
98fc685a AA |
40 | static unsigned int dataserver_timeo = NFS4_DEF_DS_TIMEO; |
41 | static unsigned int dataserver_retrans = NFS4_DEF_DS_RETRANS; | |
42 | ||
16b374ca AA |
43 | /* |
44 | * Data server cache | |
45 | * | |
46 | * Data servers can be mapped to different device ids. | |
47 | * nfs4_pnfs_ds reference counting | |
48 | * - set to 1 on allocation | |
49 | * - incremented when a device id maps a data server already in the cache. | |
50 | * - decremented when deviceid is removed from the cache. | |
51 | */ | |
17280175 | 52 | static DEFINE_SPINLOCK(nfs4_ds_cache_lock); |
16b374ca AA |
53 | static LIST_HEAD(nfs4_data_server_cache); |
54 | ||
55 | /* Debug routines */ | |
56 | void | |
57 | print_ds(struct nfs4_pnfs_ds *ds) | |
58 | { | |
59 | if (ds == NULL) { | |
60 | printk("%s NULL device\n", __func__); | |
61 | return; | |
62 | } | |
c9895cb6 | 63 | printk(" ds %s\n" |
16b374ca AA |
64 | " ref count %d\n" |
65 | " client %p\n" | |
66 | " cl_exchange_flags %x\n", | |
c9895cb6 | 67 | ds->ds_remotestr, |
16b374ca AA |
68 | atomic_read(&ds->ds_count), ds->ds_clp, |
69 | ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0); | |
70 | } | |
71 | ||
14f9a607 WAA |
72 | static bool |
73 | same_sockaddr(struct sockaddr *addr1, struct sockaddr *addr2) | |
16b374ca | 74 | { |
c9895cb6 WAA |
75 | struct sockaddr_in *a, *b; |
76 | struct sockaddr_in6 *a6, *b6; | |
16b374ca | 77 | |
14f9a607 WAA |
78 | if (addr1->sa_family != addr2->sa_family) |
79 | return false; | |
80 | ||
81 | switch (addr1->sa_family) { | |
82 | case AF_INET: | |
83 | a = (struct sockaddr_in *)addr1; | |
84 | b = (struct sockaddr_in *)addr2; | |
85 | ||
86 | if (a->sin_addr.s_addr == b->sin_addr.s_addr && | |
87 | a->sin_port == b->sin_port) | |
88 | return true; | |
89 | break; | |
90 | ||
91 | case AF_INET6: | |
92 | a6 = (struct sockaddr_in6 *)addr1; | |
93 | b6 = (struct sockaddr_in6 *)addr2; | |
94 | ||
95 | /* LINKLOCAL addresses must have matching scope_id */ | |
96 | if (ipv6_addr_scope(&a6->sin6_addr) == | |
97 | IPV6_ADDR_SCOPE_LINKLOCAL && | |
98 | a6->sin6_scope_id != b6->sin6_scope_id) | |
99 | return false; | |
100 | ||
101 | if (ipv6_addr_equal(&a6->sin6_addr, &b6->sin6_addr) && | |
102 | a6->sin6_port == b6->sin6_port) | |
103 | return true; | |
104 | break; | |
105 | ||
106 | default: | |
107 | dprintk("%s: unhandled address family: %u\n", | |
108 | __func__, addr1->sa_family); | |
109 | return false; | |
110 | } | |
111 | ||
112 | return false; | |
113 | } | |
114 | ||
17280175 | 115 | static bool |
2d3fe01c WAA |
116 | _same_data_server_addrs_locked(const struct list_head *dsaddrs1, |
117 | const struct list_head *dsaddrs2) | |
14f9a607 | 118 | { |
14f9a607 WAA |
119 | struct nfs4_pnfs_ds_addr *da1, *da2; |
120 | ||
2d3fe01c WAA |
121 | /* step through both lists, comparing as we go */ |
122 | for (da1 = list_first_entry(dsaddrs1, typeof(*da1), da_node), | |
123 | da2 = list_first_entry(dsaddrs2, typeof(*da2), da_node); | |
124 | da1 != NULL && da2 != NULL; | |
125 | da1 = list_entry(da1->da_node.next, typeof(*da1), da_node), | |
126 | da2 = list_entry(da2->da_node.next, typeof(*da2), da_node)) { | |
127 | if (!same_sockaddr((struct sockaddr *)&da1->da_addr, | |
128 | (struct sockaddr *)&da2->da_addr)) | |
129 | return false; | |
16b374ca | 130 | } |
2d3fe01c WAA |
131 | if (da1 == NULL && da2 == NULL) |
132 | return true; | |
133 | ||
134 | return false; | |
16b374ca AA |
135 | } |
136 | ||
14f9a607 | 137 | /* |
2d3fe01c | 138 | * Lookup DS by addresses. nfs4_ds_cache_lock is held |
14f9a607 | 139 | */ |
2d3fe01c WAA |
140 | static struct nfs4_pnfs_ds * |
141 | _data_server_lookup_locked(const struct list_head *dsaddrs) | |
14f9a607 | 142 | { |
2d3fe01c | 143 | struct nfs4_pnfs_ds *ds; |
14f9a607 | 144 | |
2d3fe01c WAA |
145 | list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) |
146 | if (_same_data_server_addrs_locked(&ds->ds_addrs, dsaddrs)) | |
147 | return ds; | |
148 | return NULL; | |
14f9a607 WAA |
149 | } |
150 | ||
b4a2967e AA |
151 | /* |
152 | * Lookup DS by nfs_client pointer. Zero data server client pointer | |
153 | */ | |
154 | void nfs4_ds_disconnect(struct nfs_client *clp) | |
155 | { | |
156 | struct nfs4_pnfs_ds *ds; | |
157 | struct nfs_client *found = NULL; | |
158 | ||
159 | dprintk("%s clp %p\n", __func__, clp); | |
160 | spin_lock(&nfs4_ds_cache_lock); | |
161 | list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) | |
162 | if (ds->ds_clp && ds->ds_clp == clp) { | |
163 | found = ds->ds_clp; | |
164 | ds->ds_clp = NULL; | |
165 | } | |
166 | spin_unlock(&nfs4_ds_cache_lock); | |
167 | if (found) { | |
168 | set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state); | |
169 | nfs_put_client(clp); | |
170 | } | |
171 | } | |
172 | ||
d83217c1 AA |
173 | /* |
174 | * Create an rpc connection to the nfs4_pnfs_ds data server | |
35dbbc99 | 175 | * Currently only supports IPv4 and IPv6 addresses |
d83217c1 AA |
176 | */ |
177 | static int | |
178 | nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds) | |
179 | { | |
7e574f0d | 180 | struct nfs_client *clp = ERR_PTR(-EIO); |
14f9a607 | 181 | struct nfs4_pnfs_ds_addr *da; |
d83217c1 AA |
182 | int status = 0; |
183 | ||
14f9a607 | 184 | dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr, |
d83217c1 AA |
185 | mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor); |
186 | ||
14f9a607 WAA |
187 | BUG_ON(list_empty(&ds->ds_addrs)); |
188 | ||
7e574f0d WAA |
189 | list_for_each_entry(da, &ds->ds_addrs, da_node) { |
190 | dprintk("%s: DS %s: trying address %s\n", | |
191 | __func__, ds->ds_remotestr, da->da_remotestr); | |
14f9a607 | 192 | |
7e574f0d | 193 | clp = nfs4_set_ds_client(mds_srv->nfs_client, |
98fc685a AA |
194 | (struct sockaddr *)&da->da_addr, |
195 | da->da_addrlen, IPPROTO_TCP, | |
196 | dataserver_timeo, dataserver_retrans); | |
7e574f0d WAA |
197 | if (!IS_ERR(clp)) |
198 | break; | |
199 | } | |
200 | ||
d83217c1 AA |
201 | if (IS_ERR(clp)) { |
202 | status = PTR_ERR(clp); | |
203 | goto out; | |
204 | } | |
205 | ||
206 | if ((clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) != 0) { | |
207 | if (!is_ds_client(clp)) { | |
208 | status = -ENODEV; | |
209 | goto out_put; | |
210 | } | |
211 | ds->ds_clp = clp; | |
c9895cb6 WAA |
212 | dprintk("%s [existing] server=%s\n", __func__, |
213 | ds->ds_remotestr); | |
d83217c1 AA |
214 | goto out; |
215 | } | |
216 | ||
217 | /* | |
218 | * Do not set NFS_CS_CHECK_LEASE_TIME instead set the DS lease to | |
219 | * be equal to the MDS lease. Renewal is scheduled in create_session. | |
220 | */ | |
221 | spin_lock(&mds_srv->nfs_client->cl_lock); | |
222 | clp->cl_lease_time = mds_srv->nfs_client->cl_lease_time; | |
223 | spin_unlock(&mds_srv->nfs_client->cl_lock); | |
224 | clp->cl_last_renewal = jiffies; | |
225 | ||
226 | /* New nfs_client */ | |
227 | status = nfs4_init_ds_session(clp); | |
228 | if (status) | |
229 | goto out_put; | |
230 | ||
231 | ds->ds_clp = clp; | |
c9895cb6 | 232 | dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr); |
d83217c1 AA |
233 | out: |
234 | return status; | |
235 | out_put: | |
236 | nfs_put_client(clp); | |
237 | goto out; | |
238 | } | |
239 | ||
16b374ca AA |
240 | static void |
241 | destroy_ds(struct nfs4_pnfs_ds *ds) | |
242 | { | |
14f9a607 WAA |
243 | struct nfs4_pnfs_ds_addr *da; |
244 | ||
16b374ca AA |
245 | dprintk("--> %s\n", __func__); |
246 | ifdebug(FACILITY) | |
247 | print_ds(ds); | |
248 | ||
249 | if (ds->ds_clp) | |
250 | nfs_put_client(ds->ds_clp); | |
14f9a607 WAA |
251 | |
252 | while (!list_empty(&ds->ds_addrs)) { | |
253 | da = list_first_entry(&ds->ds_addrs, | |
254 | struct nfs4_pnfs_ds_addr, | |
255 | da_node); | |
256 | list_del_init(&da->da_node); | |
257 | kfree(da->da_remotestr); | |
258 | kfree(da); | |
259 | } | |
260 | ||
c9895cb6 | 261 | kfree(ds->ds_remotestr); |
16b374ca AA |
262 | kfree(ds); |
263 | } | |
264 | ||
1775bc34 | 265 | void |
16b374ca AA |
266 | nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) |
267 | { | |
268 | struct nfs4_pnfs_ds *ds; | |
269 | int i; | |
270 | ||
a1eaecbc | 271 | nfs4_print_deviceid(&dsaddr->id_node.deviceid); |
16b374ca AA |
272 | |
273 | for (i = 0; i < dsaddr->ds_num; i++) { | |
274 | ds = dsaddr->ds_list[i]; | |
275 | if (ds != NULL) { | |
276 | if (atomic_dec_and_lock(&ds->ds_count, | |
277 | &nfs4_ds_cache_lock)) { | |
278 | list_del_init(&ds->ds_node); | |
279 | spin_unlock(&nfs4_ds_cache_lock); | |
280 | destroy_ds(ds); | |
281 | } | |
282 | } | |
283 | } | |
284 | kfree(dsaddr->stripe_indices); | |
285 | kfree(dsaddr); | |
286 | } | |
287 | ||
c9895cb6 WAA |
288 | /* |
289 | * Create a string with a human readable address and port to avoid | |
290 | * complicated setup around many dprinks. | |
291 | */ | |
292 | static char * | |
14f9a607 | 293 | nfs4_pnfs_remotestr(struct list_head *dsaddrs, gfp_t gfp_flags) |
c9895cb6 | 294 | { |
14f9a607 | 295 | struct nfs4_pnfs_ds_addr *da; |
c9895cb6 | 296 | char *remotestr; |
c9895cb6 | 297 | size_t len; |
14f9a607 | 298 | char *p; |
c9895cb6 | 299 | |
14f9a607 WAA |
300 | len = 3; /* '{', '}' and eol */ |
301 | list_for_each_entry(da, dsaddrs, da_node) { | |
302 | len += strlen(da->da_remotestr) + 1; /* string plus comma */ | |
c9895cb6 WAA |
303 | } |
304 | ||
14f9a607 WAA |
305 | remotestr = kzalloc(len, gfp_flags); |
306 | if (!remotestr) | |
c9895cb6 | 307 | return NULL; |
c9895cb6 | 308 | |
14f9a607 WAA |
309 | p = remotestr; |
310 | *(p++) = '{'; | |
311 | len--; | |
312 | list_for_each_entry(da, dsaddrs, da_node) { | |
313 | size_t ll = strlen(da->da_remotestr); | |
c9895cb6 | 314 | |
14f9a607 WAA |
315 | if (ll > len) |
316 | goto out_err; | |
c9895cb6 | 317 | |
14f9a607 WAA |
318 | memcpy(p, da->da_remotestr, ll); |
319 | p += ll; | |
320 | len -= ll; | |
c9895cb6 | 321 | |
14f9a607 WAA |
322 | if (len < 1) |
323 | goto out_err; | |
324 | (*p++) = ','; | |
325 | len--; | |
326 | } | |
327 | if (len < 2) | |
328 | goto out_err; | |
329 | *(p++) = '}'; | |
330 | *p = '\0'; | |
c9895cb6 | 331 | return remotestr; |
14f9a607 WAA |
332 | out_err: |
333 | kfree(remotestr); | |
334 | return NULL; | |
c9895cb6 WAA |
335 | } |
336 | ||
16b374ca | 337 | static struct nfs4_pnfs_ds * |
14f9a607 | 338 | nfs4_pnfs_ds_add(struct list_head *dsaddrs, gfp_t gfp_flags) |
16b374ca | 339 | { |
c9895cb6 WAA |
340 | struct nfs4_pnfs_ds *tmp_ds, *ds = NULL; |
341 | char *remotestr; | |
16b374ca | 342 | |
14f9a607 WAA |
343 | if (list_empty(dsaddrs)) { |
344 | dprintk("%s: no addresses defined\n", __func__); | |
345 | goto out; | |
346 | } | |
347 | ||
348 | ds = kzalloc(sizeof(*ds), gfp_flags); | |
16b374ca AA |
349 | if (!ds) |
350 | goto out; | |
351 | ||
c9895cb6 | 352 | /* this is only used for debugging, so it's ok if its NULL */ |
14f9a607 | 353 | remotestr = nfs4_pnfs_remotestr(dsaddrs, gfp_flags); |
c9895cb6 | 354 | |
16b374ca | 355 | spin_lock(&nfs4_ds_cache_lock); |
14f9a607 | 356 | tmp_ds = _data_server_lookup_locked(dsaddrs); |
16b374ca | 357 | if (tmp_ds == NULL) { |
14f9a607 WAA |
358 | INIT_LIST_HEAD(&ds->ds_addrs); |
359 | list_splice_init(dsaddrs, &ds->ds_addrs); | |
c9895cb6 | 360 | ds->ds_remotestr = remotestr; |
16b374ca AA |
361 | atomic_set(&ds->ds_count, 1); |
362 | INIT_LIST_HEAD(&ds->ds_node); | |
363 | ds->ds_clp = NULL; | |
364 | list_add(&ds->ds_node, &nfs4_data_server_cache); | |
c9895cb6 WAA |
365 | dprintk("%s add new data server %s\n", __func__, |
366 | ds->ds_remotestr); | |
16b374ca | 367 | } else { |
c9895cb6 | 368 | kfree(remotestr); |
16b374ca AA |
369 | kfree(ds); |
370 | atomic_inc(&tmp_ds->ds_count); | |
c9895cb6 WAA |
371 | dprintk("%s data server %s found, inc'ed ds_count to %d\n", |
372 | __func__, tmp_ds->ds_remotestr, | |
16b374ca AA |
373 | atomic_read(&tmp_ds->ds_count)); |
374 | ds = tmp_ds; | |
375 | } | |
376 | spin_unlock(&nfs4_ds_cache_lock); | |
377 | out: | |
378 | return ds; | |
379 | } | |
380 | ||
381 | /* | |
c9895cb6 | 382 | * Currently only supports ipv4, ipv6 and one multi-path address. |
16b374ca | 383 | */ |
14f9a607 | 384 | static struct nfs4_pnfs_ds_addr * |
17094272 | 385 | decode_ds_addr(struct net *net, struct xdr_stream *streamp, gfp_t gfp_flags) |
16b374ca | 386 | { |
14f9a607 | 387 | struct nfs4_pnfs_ds_addr *da = NULL; |
c9895cb6 | 388 | char *buf, *portstr; |
13fff2f3 | 389 | __be16 port; |
c9895cb6 | 390 | int nlen, rlen; |
16b374ca | 391 | int tmp[2]; |
35124a09 | 392 | __be32 *p; |
c9895cb6 | 393 | char *netid, *match_netid; |
14f9a607 WAA |
394 | size_t len, match_netid_len; |
395 | char *startsep = ""; | |
396 | char *endsep = ""; | |
397 | ||
16b374ca AA |
398 | |
399 | /* r_netid */ | |
35124a09 WAA |
400 | p = xdr_inline_decode(streamp, 4); |
401 | if (unlikely(!p)) | |
402 | goto out_err; | |
16b374ca | 403 | nlen = be32_to_cpup(p++); |
16b374ca | 404 | |
35124a09 WAA |
405 | p = xdr_inline_decode(streamp, nlen); |
406 | if (unlikely(!p)) | |
407 | goto out_err; | |
16b374ca | 408 | |
c9895cb6 WAA |
409 | netid = kmalloc(nlen+1, gfp_flags); |
410 | if (unlikely(!netid)) | |
16b374ca | 411 | goto out_err; |
16b374ca | 412 | |
c9895cb6 WAA |
413 | netid[nlen] = '\0'; |
414 | memcpy(netid, p, nlen); | |
415 | ||
416 | /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */ | |
35124a09 WAA |
417 | p = xdr_inline_decode(streamp, 4); |
418 | if (unlikely(!p)) | |
c9895cb6 | 419 | goto out_free_netid; |
35124a09 WAA |
420 | rlen = be32_to_cpup(p); |
421 | ||
422 | p = xdr_inline_decode(streamp, rlen); | |
423 | if (unlikely(!p)) | |
c9895cb6 | 424 | goto out_free_netid; |
35124a09 | 425 | |
c9895cb6 WAA |
426 | /* port is ".ABC.DEF", 8 chars max */ |
427 | if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) { | |
ad3d2eed | 428 | dprintk("%s: Invalid address, length %d\n", __func__, |
16b374ca | 429 | rlen); |
c9895cb6 | 430 | goto out_free_netid; |
16b374ca | 431 | } |
a75b9df9 | 432 | buf = kmalloc(rlen + 1, gfp_flags); |
b9f81057 SF |
433 | if (!buf) { |
434 | dprintk("%s: Not enough memory\n", __func__); | |
c9895cb6 | 435 | goto out_free_netid; |
b9f81057 | 436 | } |
16b374ca | 437 | buf[rlen] = '\0'; |
35124a09 | 438 | memcpy(buf, p, rlen); |
16b374ca | 439 | |
c9895cb6 WAA |
440 | /* replace port '.' with '-' */ |
441 | portstr = strrchr(buf, '.'); | |
442 | if (!portstr) { | |
443 | dprintk("%s: Failed finding expected dot in port\n", | |
444 | __func__); | |
445 | goto out_free_buf; | |
446 | } | |
447 | *portstr = '-'; | |
448 | ||
449 | /* find '.' between address and port */ | |
450 | portstr = strrchr(buf, '.'); | |
451 | if (!portstr) { | |
452 | dprintk("%s: Failed finding expected dot between address and " | |
453 | "port\n", __func__); | |
454 | goto out_free_buf; | |
16b374ca | 455 | } |
c9895cb6 | 456 | *portstr = '\0'; |
16b374ca | 457 | |
14f9a607 WAA |
458 | da = kzalloc(sizeof(*da), gfp_flags); |
459 | if (unlikely(!da)) | |
c9895cb6 | 460 | goto out_free_buf; |
14f9a607 WAA |
461 | |
462 | INIT_LIST_HEAD(&da->da_node); | |
463 | ||
17094272 | 464 | if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr, |
14f9a607 WAA |
465 | sizeof(da->da_addr))) { |
466 | dprintk("%s: error parsing address %s\n", __func__, buf); | |
467 | goto out_free_da; | |
16b374ca AA |
468 | } |
469 | ||
c9895cb6 WAA |
470 | portstr++; |
471 | sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]); | |
16b374ca AA |
472 | port = htons((tmp[0] << 8) | (tmp[1])); |
473 | ||
14f9a607 | 474 | switch (da->da_addr.ss_family) { |
c9895cb6 | 475 | case AF_INET: |
14f9a607 WAA |
476 | ((struct sockaddr_in *)&da->da_addr)->sin_port = port; |
477 | da->da_addrlen = sizeof(struct sockaddr_in); | |
c9895cb6 WAA |
478 | match_netid = "tcp"; |
479 | match_netid_len = 3; | |
480 | break; | |
481 | ||
482 | case AF_INET6: | |
14f9a607 WAA |
483 | ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port; |
484 | da->da_addrlen = sizeof(struct sockaddr_in6); | |
c9895cb6 WAA |
485 | match_netid = "tcp6"; |
486 | match_netid_len = 4; | |
14f9a607 WAA |
487 | startsep = "["; |
488 | endsep = "]"; | |
c9895cb6 WAA |
489 | break; |
490 | ||
491 | default: | |
492 | dprintk("%s: unsupported address family: %u\n", | |
14f9a607 WAA |
493 | __func__, da->da_addr.ss_family); |
494 | goto out_free_da; | |
c9895cb6 WAA |
495 | } |
496 | ||
497 | if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) { | |
498 | dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n", | |
499 | __func__, netid, match_netid); | |
14f9a607 | 500 | goto out_free_da; |
c9895cb6 WAA |
501 | } |
502 | ||
14f9a607 WAA |
503 | /* save human readable address */ |
504 | len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7; | |
505 | da->da_remotestr = kzalloc(len, gfp_flags); | |
506 | ||
507 | /* NULL is ok, only used for dprintk */ | |
508 | if (da->da_remotestr) | |
509 | snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep, | |
510 | buf, endsep, ntohs(port)); | |
511 | ||
512 | dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr); | |
513 | kfree(buf); | |
514 | kfree(netid); | |
515 | return da; | |
516 | ||
517 | out_free_da: | |
518 | kfree(da); | |
c9895cb6 | 519 | out_free_buf: |
14f9a607 | 520 | dprintk("%s: Error parsing DS addr: %s\n", __func__, buf); |
16b374ca | 521 | kfree(buf); |
c9895cb6 WAA |
522 | out_free_netid: |
523 | kfree(netid); | |
16b374ca | 524 | out_err: |
14f9a607 | 525 | return NULL; |
16b374ca AA |
526 | } |
527 | ||
528 | /* Decode opaque device data and return the result */ | |
529 | static struct nfs4_file_layout_dsaddr* | |
a75b9df9 | 530 | decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags) |
16b374ca | 531 | { |
35124a09 | 532 | int i; |
16b374ca AA |
533 | u32 cnt, num; |
534 | u8 *indexp; | |
35124a09 WAA |
535 | __be32 *p; |
536 | u8 *stripe_indices; | |
537 | u8 max_stripe_index; | |
538 | struct nfs4_file_layout_dsaddr *dsaddr = NULL; | |
539 | struct xdr_stream stream; | |
f7da7a12 | 540 | struct xdr_buf buf; |
35124a09 | 541 | struct page *scratch; |
14f9a607 WAA |
542 | struct list_head dsaddrs; |
543 | struct nfs4_pnfs_ds_addr *da; | |
35124a09 WAA |
544 | |
545 | /* set up xdr stream */ | |
a75b9df9 | 546 | scratch = alloc_page(gfp_flags); |
35124a09 WAA |
547 | if (!scratch) |
548 | goto out_err; | |
549 | ||
f7da7a12 | 550 | xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen); |
35124a09 | 551 | xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); |
16b374ca AA |
552 | |
553 | /* Get the stripe count (number of stripe index) */ | |
35124a09 WAA |
554 | p = xdr_inline_decode(&stream, 4); |
555 | if (unlikely(!p)) | |
556 | goto out_err_free_scratch; | |
557 | ||
558 | cnt = be32_to_cpup(p); | |
16b374ca AA |
559 | dprintk("%s stripe count %d\n", __func__, cnt); |
560 | if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) { | |
a030889a | 561 | printk(KERN_WARNING "NFS: %s: stripe count %d greater than " |
16b374ca AA |
562 | "supported maximum %d\n", __func__, |
563 | cnt, NFS4_PNFS_MAX_STRIPE_CNT); | |
35124a09 WAA |
564 | goto out_err_free_scratch; |
565 | } | |
566 | ||
567 | /* read stripe indices */ | |
a75b9df9 | 568 | stripe_indices = kcalloc(cnt, sizeof(u8), gfp_flags); |
35124a09 WAA |
569 | if (!stripe_indices) |
570 | goto out_err_free_scratch; | |
571 | ||
572 | p = xdr_inline_decode(&stream, cnt << 2); | |
573 | if (unlikely(!p)) | |
574 | goto out_err_free_stripe_indices; | |
575 | ||
576 | indexp = &stripe_indices[0]; | |
577 | max_stripe_index = 0; | |
578 | for (i = 0; i < cnt; i++) { | |
579 | *indexp = be32_to_cpup(p++); | |
580 | max_stripe_index = max(max_stripe_index, *indexp); | |
581 | indexp++; | |
16b374ca AA |
582 | } |
583 | ||
584 | /* Check the multipath list count */ | |
35124a09 WAA |
585 | p = xdr_inline_decode(&stream, 4); |
586 | if (unlikely(!p)) | |
587 | goto out_err_free_stripe_indices; | |
588 | ||
589 | num = be32_to_cpup(p); | |
16b374ca AA |
590 | dprintk("%s ds_num %u\n", __func__, num); |
591 | if (num > NFS4_PNFS_MAX_MULTI_CNT) { | |
a030889a | 592 | printk(KERN_WARNING "NFS: %s: multipath count %d greater than " |
16b374ca AA |
593 | "supported maximum %d\n", __func__, |
594 | num, NFS4_PNFS_MAX_MULTI_CNT); | |
35124a09 | 595 | goto out_err_free_stripe_indices; |
16b374ca | 596 | } |
35124a09 WAA |
597 | |
598 | /* validate stripe indices are all < num */ | |
599 | if (max_stripe_index >= num) { | |
a030889a | 600 | printk(KERN_WARNING "NFS: %s: stripe index %u >= num ds %u\n", |
35124a09 WAA |
601 | __func__, max_stripe_index, num); |
602 | goto out_err_free_stripe_indices; | |
603 | } | |
604 | ||
16b374ca AA |
605 | dsaddr = kzalloc(sizeof(*dsaddr) + |
606 | (sizeof(struct nfs4_pnfs_ds *) * (num - 1)), | |
a75b9df9 | 607 | gfp_flags); |
16b374ca | 608 | if (!dsaddr) |
35124a09 | 609 | goto out_err_free_stripe_indices; |
16b374ca AA |
610 | |
611 | dsaddr->stripe_count = cnt; | |
35124a09 WAA |
612 | dsaddr->stripe_indices = stripe_indices; |
613 | stripe_indices = NULL; | |
16b374ca | 614 | dsaddr->ds_num = num; |
1775bc34 BH |
615 | nfs4_init_deviceid_node(&dsaddr->id_node, |
616 | NFS_SERVER(ino)->pnfs_curr_ld, | |
617 | NFS_SERVER(ino)->nfs_client, | |
a1eaecbc | 618 | &pdev->dev_id); |
16b374ca | 619 | |
14f9a607 WAA |
620 | INIT_LIST_HEAD(&dsaddrs); |
621 | ||
16b374ca AA |
622 | for (i = 0; i < dsaddr->ds_num; i++) { |
623 | int j; | |
35124a09 WAA |
624 | u32 mp_count; |
625 | ||
626 | p = xdr_inline_decode(&stream, 4); | |
627 | if (unlikely(!p)) | |
628 | goto out_err_free_deviceid; | |
16b374ca | 629 | |
35124a09 | 630 | mp_count = be32_to_cpup(p); /* multipath count */ |
35124a09 | 631 | for (j = 0; j < mp_count; j++) { |
17094272 SK |
632 | da = decode_ds_addr(NFS_SERVER(ino)->nfs_client->net, |
633 | &stream, gfp_flags); | |
14f9a607 WAA |
634 | if (da) |
635 | list_add_tail(&da->da_node, &dsaddrs); | |
636 | } | |
637 | if (list_empty(&dsaddrs)) { | |
638 | dprintk("%s: no suitable DS addresses found\n", | |
639 | __func__); | |
640 | goto out_err_free_deviceid; | |
641 | } | |
642 | ||
643 | dsaddr->ds_list[i] = nfs4_pnfs_ds_add(&dsaddrs, gfp_flags); | |
644 | if (!dsaddr->ds_list[i]) | |
645 | goto out_err_drain_dsaddrs; | |
646 | ||
647 | /* If DS was already in cache, free ds addrs */ | |
648 | while (!list_empty(&dsaddrs)) { | |
649 | da = list_first_entry(&dsaddrs, | |
650 | struct nfs4_pnfs_ds_addr, | |
651 | da_node); | |
652 | list_del_init(&da->da_node); | |
653 | kfree(da->da_remotestr); | |
654 | kfree(da); | |
16b374ca AA |
655 | } |
656 | } | |
35124a09 WAA |
657 | |
658 | __free_page(scratch); | |
16b374ca AA |
659 | return dsaddr; |
660 | ||
14f9a607 WAA |
661 | out_err_drain_dsaddrs: |
662 | while (!list_empty(&dsaddrs)) { | |
663 | da = list_first_entry(&dsaddrs, struct nfs4_pnfs_ds_addr, | |
664 | da_node); | |
665 | list_del_init(&da->da_node); | |
666 | kfree(da->da_remotestr); | |
667 | kfree(da); | |
668 | } | |
35124a09 | 669 | out_err_free_deviceid: |
16b374ca | 670 | nfs4_fl_free_deviceid(dsaddr); |
35124a09 WAA |
671 | /* stripe_indicies was part of dsaddr */ |
672 | goto out_err_free_scratch; | |
673 | out_err_free_stripe_indices: | |
674 | kfree(stripe_indices); | |
675 | out_err_free_scratch: | |
676 | __free_page(scratch); | |
16b374ca AA |
677 | out_err: |
678 | dprintk("%s ERROR: returning NULL\n", __func__); | |
679 | return NULL; | |
680 | } | |
681 | ||
682 | /* | |
ea8eecdd CH |
683 | * Decode the opaque device specified in 'dev' and add it to the cache of |
684 | * available devices. | |
16b374ca | 685 | */ |
ea8eecdd | 686 | static struct nfs4_file_layout_dsaddr * |
a75b9df9 | 687 | decode_and_add_device(struct inode *inode, struct pnfs_device *dev, gfp_t gfp_flags) |
16b374ca | 688 | { |
a1eaecbc BH |
689 | struct nfs4_deviceid_node *d; |
690 | struct nfs4_file_layout_dsaddr *n, *new; | |
16b374ca | 691 | |
a75b9df9 | 692 | new = decode_device(inode, dev, gfp_flags); |
ea8eecdd | 693 | if (!new) { |
a030889a | 694 | printk(KERN_WARNING "NFS: %s: Could not decode or add device\n", |
16b374ca AA |
695 | __func__); |
696 | return NULL; | |
697 | } | |
698 | ||
a1eaecbc BH |
699 | d = nfs4_insert_deviceid_node(&new->id_node); |
700 | n = container_of(d, struct nfs4_file_layout_dsaddr, id_node); | |
701 | if (n != new) { | |
ea8eecdd | 702 | nfs4_fl_free_deviceid(new); |
a1eaecbc | 703 | return n; |
ea8eecdd CH |
704 | } |
705 | ||
ea8eecdd | 706 | return new; |
16b374ca AA |
707 | } |
708 | ||
709 | /* | |
710 | * Retrieve the information for dev_id, add it to the list | |
711 | * of available devices, and return it. | |
712 | */ | |
713 | struct nfs4_file_layout_dsaddr * | |
a75b9df9 | 714 | get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id, gfp_t gfp_flags) |
16b374ca AA |
715 | { |
716 | struct pnfs_device *pdev = NULL; | |
717 | u32 max_resp_sz; | |
718 | int max_pages; | |
719 | struct page **pages = NULL; | |
720 | struct nfs4_file_layout_dsaddr *dsaddr = NULL; | |
721 | int rc, i; | |
722 | struct nfs_server *server = NFS_SERVER(inode); | |
723 | ||
724 | /* | |
725 | * Use the session max response size as the basis for setting | |
726 | * GETDEVICEINFO's maxcount | |
727 | */ | |
728 | max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; | |
e5265a0c | 729 | max_pages = nfs_page_array_len(0, max_resp_sz); |
16b374ca AA |
730 | dprintk("%s inode %p max_resp_sz %u max_pages %d\n", |
731 | __func__, inode, max_resp_sz, max_pages); | |
732 | ||
a75b9df9 | 733 | pdev = kzalloc(sizeof(struct pnfs_device), gfp_flags); |
16b374ca AA |
734 | if (pdev == NULL) |
735 | return NULL; | |
736 | ||
a75b9df9 | 737 | pages = kzalloc(max_pages * sizeof(struct page *), gfp_flags); |
16b374ca AA |
738 | if (pages == NULL) { |
739 | kfree(pdev); | |
740 | return NULL; | |
741 | } | |
742 | for (i = 0; i < max_pages; i++) { | |
a75b9df9 | 743 | pages[i] = alloc_page(gfp_flags); |
16b374ca AA |
744 | if (!pages[i]) |
745 | goto out_free; | |
746 | } | |
747 | ||
16b374ca AA |
748 | memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id)); |
749 | pdev->layout_type = LAYOUT_NFSV4_1_FILES; | |
750 | pdev->pages = pages; | |
751 | pdev->pgbase = 0; | |
752 | pdev->pglen = PAGE_SIZE * max_pages; | |
753 | pdev->mincount = 0; | |
754 | ||
755 | rc = nfs4_proc_getdeviceinfo(server, pdev); | |
756 | dprintk("%s getdevice info returns %d\n", __func__, rc); | |
757 | if (rc) | |
758 | goto out_free; | |
759 | ||
760 | /* | |
761 | * Found new device, need to decode it and then add it to the | |
762 | * list of known devices for this mountpoint. | |
763 | */ | |
a75b9df9 | 764 | dsaddr = decode_and_add_device(inode, pdev, gfp_flags); |
16b374ca | 765 | out_free: |
16b374ca AA |
766 | for (i = 0; i < max_pages; i++) |
767 | __free_page(pages[i]); | |
768 | kfree(pages); | |
769 | kfree(pdev); | |
770 | dprintk("<-- %s dsaddr %p\n", __func__, dsaddr); | |
771 | return dsaddr; | |
772 | } | |
773 | ||
ea8eecdd CH |
774 | void |
775 | nfs4_fl_put_deviceid(struct nfs4_file_layout_dsaddr *dsaddr) | |
16b374ca | 776 | { |
1775bc34 | 777 | nfs4_put_deviceid_node(&dsaddr->id_node); |
16b374ca | 778 | } |
cfe7f412 FI |
779 | |
780 | /* | |
781 | * Want res = (offset - layout->pattern_offset)/ layout->stripe_unit | |
782 | * Then: ((res + fsi) % dsaddr->stripe_count) | |
783 | */ | |
784 | u32 | |
785 | nfs4_fl_calc_j_index(struct pnfs_layout_segment *lseg, loff_t offset) | |
786 | { | |
787 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
788 | u64 tmp; | |
789 | ||
790 | tmp = offset - flseg->pattern_offset; | |
791 | do_div(tmp, flseg->stripe_unit); | |
792 | tmp += flseg->first_stripe_index; | |
793 | return do_div(tmp, flseg->dsaddr->stripe_count); | |
794 | } | |
795 | ||
796 | u32 | |
797 | nfs4_fl_calc_ds_index(struct pnfs_layout_segment *lseg, u32 j) | |
798 | { | |
799 | return FILELAYOUT_LSEG(lseg)->dsaddr->stripe_indices[j]; | |
800 | } | |
801 | ||
802 | struct nfs_fh * | |
803 | nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j) | |
804 | { | |
805 | struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg); | |
806 | u32 i; | |
807 | ||
808 | if (flseg->stripe_type == STRIPE_SPARSE) { | |
809 | if (flseg->num_fh == 1) | |
810 | i = 0; | |
811 | else if (flseg->num_fh == 0) | |
812 | /* Use the MDS OPEN fh set in nfs_read_rpcsetup */ | |
813 | return NULL; | |
814 | else | |
815 | i = nfs4_fl_calc_ds_index(lseg, j); | |
816 | } else | |
817 | i = j; | |
818 | return flseg->fh_array[i]; | |
819 | } | |
820 | ||
821 | struct nfs4_pnfs_ds * | |
822 | nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx) | |
823 | { | |
824 | struct nfs4_file_layout_dsaddr *dsaddr = FILELAYOUT_LSEG(lseg)->dsaddr; | |
825 | struct nfs4_pnfs_ds *ds = dsaddr->ds_list[ds_idx]; | |
554d458d AA |
826 | struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg); |
827 | ||
828 | if (filelayout_test_devid_invalid(devid)) | |
829 | return NULL; | |
cfe7f412 FI |
830 | |
831 | if (ds == NULL) { | |
a030889a | 832 | printk(KERN_ERR "NFS: %s: No data server for offset index %d\n", |
cfe7f412 | 833 | __func__, ds_idx); |
554d458d | 834 | goto mark_dev_invalid; |
cfe7f412 FI |
835 | } |
836 | ||
837 | if (!ds->ds_clp) { | |
568e8c49 | 838 | struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode); |
cfe7f412 FI |
839 | int err; |
840 | ||
568e8c49 | 841 | err = nfs4_ds_connect(s, ds); |
554d458d AA |
842 | if (err) |
843 | goto mark_dev_invalid; | |
cfe7f412 FI |
844 | } |
845 | return ds; | |
554d458d AA |
846 | |
847 | mark_dev_invalid: | |
848 | filelayout_mark_devid_invalid(devid); | |
849 | return NULL; | |
cfe7f412 | 850 | } |
98fc685a AA |
851 | |
852 | module_param(dataserver_retrans, uint, 0644); | |
853 | MODULE_PARM_DESC(dataserver_retrans, "The number of times the NFSv4.1 client " | |
854 | "retries a request before it attempts further " | |
855 | " recovery action."); | |
856 | module_param(dataserver_timeo, uint, 0644); | |
857 | MODULE_PARM_DESC(dataserver_timeo, "The time (in tenths of a second) the " | |
858 | "NFSv4.1 client waits for a response from a " | |
859 | " data server before it retries an NFS request."); |