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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/callback_proc.c | |
3 | * | |
4 | * Copyright (C) 2004 Trond Myklebust | |
5 | * | |
6 | * NFSv4 callback procedures | |
7 | */ | |
1da177e4 LT |
8 | #include <linux/nfs4.h> |
9 | #include <linux/nfs_fs.h> | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
2446ab60 | 11 | #include <linux/rcupdate.h> |
4ce79717 | 12 | #include "nfs4_fs.h" |
1da177e4 LT |
13 | #include "callback.h" |
14 | #include "delegation.h" | |
24c8dbbb | 15 | #include "internal.h" |
43f1b3da | 16 | #include "pnfs.h" |
73e39aaa | 17 | #include "nfs4session.h" |
ca8acf8d | 18 | #include "nfs4trace.h" |
1da177e4 LT |
19 | |
20 | #define NFSDBG_FACILITY NFSDBG_CALLBACK | |
c36fca52 AA |
21 | |
22 | __be32 nfs4_callback_getattr(struct cb_getattrargs *args, | |
23 | struct cb_getattrres *res, | |
24 | struct cb_process_state *cps) | |
1da177e4 | 25 | { |
1da177e4 LT |
26 | struct nfs_delegation *delegation; |
27 | struct nfs_inode *nfsi; | |
28 | struct inode *inode; | |
1d98fe67 | 29 | |
c36fca52 AA |
30 | res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
31 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
32 | goto out; | |
33 | ||
1da177e4 LT |
34 | res->bitmap[0] = res->bitmap[1] = 0; |
35 | res->status = htonl(NFS4ERR_BADHANDLE); | |
1d98fe67 | 36 | |
2446ab60 | 37 | dprintk_rcu("NFS: GETATTR callback request from %s\n", |
c36fca52 | 38 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
1d98fe67 | 39 | |
c36fca52 | 40 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
7cd14861 | 41 | if (inode == NULL) { |
249b2eef | 42 | trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL, |
7cd14861 | 43 | -ntohl(res->status)); |
c36fca52 | 44 | goto out; |
7cd14861 | 45 | } |
1da177e4 | 46 | nfsi = NFS_I(inode); |
761fe93c TM |
47 | rcu_read_lock(); |
48 | delegation = rcu_dereference(nfsi->delegation); | |
1da177e4 LT |
49 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
50 | goto out_iput; | |
51 | res->size = i_size_read(inode); | |
beb2a5ec | 52 | res->change_attr = delegation->change_attr; |
cb1410c7 | 53 | if (nfsi->nrequests != 0) |
beb2a5ec | 54 | res->change_attr++; |
1da177e4 LT |
55 | res->ctime = inode->i_ctime; |
56 | res->mtime = inode->i_mtime; | |
57 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & | |
58 | args->bitmap[0]; | |
59 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & | |
60 | args->bitmap[1]; | |
61 | res->status = 0; | |
62 | out_iput: | |
761fe93c | 63 | rcu_read_unlock(); |
7cd14861 | 64 | trace_nfs4_cb_getattr(cps->clp, &args->fh, inode, -ntohl(res->status)); |
1da177e4 | 65 | iput(inode); |
1da177e4 | 66 | out: |
3110ff80 | 67 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
1da177e4 LT |
68 | return res->status; |
69 | } | |
70 | ||
c36fca52 AA |
71 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
72 | struct cb_process_state *cps) | |
1da177e4 | 73 | { |
1da177e4 | 74 | struct inode *inode; |
e6f684f6 | 75 | __be32 res; |
1da177e4 | 76 | |
c36fca52 AA |
77 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
78 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
1da177e4 | 79 | goto out; |
1d98fe67 | 80 | |
2446ab60 | 81 | dprintk_rcu("NFS: RECALL callback request from %s\n", |
c36fca52 AA |
82 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
83 | ||
84 | res = htonl(NFS4ERR_BADHANDLE); | |
85 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); | |
e07db907 TM |
86 | if (inode == NULL) { |
87 | trace_nfs4_cb_recall(cps->clp, &args->fh, NULL, | |
88 | &args->stateid, -ntohl(res)); | |
c36fca52 | 89 | goto out; |
e07db907 | 90 | } |
c36fca52 AA |
91 | /* Set up a helper thread to actually return the delegation */ |
92 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
93 | case 0: | |
94 | res = 0; | |
95 | break; | |
96 | case -ENOENT: | |
8e663f0e | 97 | res = htonl(NFS4ERR_BAD_STATEID); |
c36fca52 AA |
98 | break; |
99 | default: | |
100 | res = htonl(NFS4ERR_RESOURCE); | |
101 | } | |
e07db907 TM |
102 | trace_nfs4_cb_recall(cps->clp, &args->fh, inode, |
103 | &args->stateid, -ntohl(res)); | |
c36fca52 | 104 | iput(inode); |
1da177e4 | 105 | out: |
3110ff80 | 106 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
1da177e4 LT |
107 | return res; |
108 | } | |
d49433e1 BH |
109 | |
110 | #if defined(CONFIG_NFS_V4_1) | |
111 | ||
d36b7cf7 | 112 | /* |
7b410d9c | 113 | * Lookup a layout inode by stateid |
d36b7cf7 | 114 | * |
7b410d9c TM |
115 | * Note: returns a refcount on the inode and superblock |
116 | */ | |
117 | static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp, | |
118 | const nfs4_stateid *stateid) | |
119 | { | |
120 | struct nfs_server *server; | |
121 | struct inode *inode; | |
122 | struct pnfs_layout_hdr *lo; | |
123 | ||
124 | restart: | |
125 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
126 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
127 | if (stateid != NULL && | |
128 | !nfs4_stateid_match_other(stateid, &lo->plh_stateid)) | |
129 | continue; | |
130 | inode = igrab(lo->plh_inode); | |
131 | if (!inode) | |
132 | continue; | |
133 | if (!nfs_sb_active(inode->i_sb)) { | |
134 | rcu_read_lock(); | |
135 | spin_unlock(&clp->cl_lock); | |
136 | iput(inode); | |
137 | spin_lock(&clp->cl_lock); | |
138 | goto restart; | |
139 | } | |
140 | return inode; | |
141 | } | |
142 | } | |
143 | ||
144 | return NULL; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Lookup a layout inode by filehandle. | |
149 | * | |
150 | * Note: returns a refcount on the inode and superblock | |
d36b7cf7 | 151 | * |
d36b7cf7 | 152 | */ |
7b410d9c TM |
153 | static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp, |
154 | const struct nfs_fh *fh) | |
43f1b3da | 155 | { |
6382a441 | 156 | struct nfs_server *server; |
793b7fe5 | 157 | struct nfs_inode *nfsi; |
7b410d9c | 158 | struct inode *inode; |
d36b7cf7 | 159 | struct pnfs_layout_hdr *lo; |
43f1b3da | 160 | |
793b7fe5 | 161 | restart: |
6382a441 WAA |
162 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
163 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
793b7fe5 TM |
164 | nfsi = NFS_I(lo->plh_inode); |
165 | if (nfs_compare_fh(fh, &nfsi->fh)) | |
27999f25 | 166 | continue; |
793b7fe5 | 167 | if (nfsi->layout != lo) |
6382a441 | 168 | continue; |
7b410d9c TM |
169 | inode = igrab(lo->plh_inode); |
170 | if (!inode) | |
171 | continue; | |
172 | if (!nfs_sb_active(inode->i_sb)) { | |
173 | rcu_read_lock(); | |
174 | spin_unlock(&clp->cl_lock); | |
175 | iput(inode); | |
176 | spin_lock(&clp->cl_lock); | |
793b7fe5 | 177 | goto restart; |
9c626381 | 178 | } |
7b410d9c | 179 | return inode; |
6382a441 | 180 | } |
43f1b3da | 181 | } |
d36b7cf7 BH |
182 | |
183 | return NULL; | |
184 | } | |
185 | ||
7b410d9c TM |
186 | static struct inode *nfs_layout_find_inode(struct nfs_client *clp, |
187 | const struct nfs_fh *fh, | |
188 | const nfs4_stateid *stateid) | |
d36b7cf7 | 189 | { |
7b410d9c | 190 | struct inode *inode; |
d36b7cf7 BH |
191 | |
192 | spin_lock(&clp->cl_lock); | |
193 | rcu_read_lock(); | |
7b410d9c TM |
194 | inode = nfs_layout_find_inode_by_stateid(clp, stateid); |
195 | if (!inode) | |
196 | inode = nfs_layout_find_inode_by_fh(clp, fh); | |
6382a441 | 197 | rcu_read_unlock(); |
43f1b3da | 198 | spin_unlock(&clp->cl_lock); |
6382a441 | 199 | |
7b410d9c | 200 | return inode; |
d36b7cf7 BH |
201 | } |
202 | ||
41c9127d TM |
203 | /* |
204 | * Enforce RFC5661 section 12.5.5.2.1. (Layout Recall and Return Sequencing) | |
205 | */ | |
793b7fe5 | 206 | static u32 pnfs_check_callback_stateid(struct pnfs_layout_hdr *lo, |
41c9127d TM |
207 | const nfs4_stateid *new) |
208 | { | |
209 | u32 oldseq, newseq; | |
210 | ||
793b7fe5 TM |
211 | /* Is the stateid still not initialised? */ |
212 | if (!pnfs_layout_is_valid(lo)) | |
213 | return NFS4ERR_DELAY; | |
214 | ||
215 | /* Mismatched stateid? */ | |
216 | if (!nfs4_stateid_match_other(&lo->plh_stateid, new)) | |
217 | return NFS4ERR_BAD_STATEID; | |
218 | ||
41c9127d | 219 | newseq = be32_to_cpu(new->seqid); |
793b7fe5 TM |
220 | /* Are we already in a layout recall situation? */ |
221 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && | |
222 | lo->plh_return_seq != 0) { | |
223 | if (newseq < lo->plh_return_seq) | |
224 | return NFS4ERR_OLD_STATEID; | |
225 | if (newseq > lo->plh_return_seq) | |
226 | return NFS4ERR_DELAY; | |
227 | goto out; | |
228 | } | |
41c9127d | 229 | |
793b7fe5 TM |
230 | /* Check that the stateid matches what we think it should be. */ |
231 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); | |
41c9127d | 232 | if (newseq > oldseq + 1) |
793b7fe5 TM |
233 | return NFS4ERR_DELAY; |
234 | /* Crazy server! */ | |
235 | if (newseq <= oldseq) | |
236 | return NFS4ERR_OLD_STATEID; | |
237 | out: | |
238 | return NFS_OK; | |
41c9127d TM |
239 | } |
240 | ||
d36b7cf7 BH |
241 | static u32 initiate_file_draining(struct nfs_client *clp, |
242 | struct cb_layoutrecallargs *args) | |
243 | { | |
244 | struct inode *ino; | |
245 | struct pnfs_layout_hdr *lo; | |
246 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
247 | LIST_HEAD(free_me_list); | |
248 | ||
7b410d9c TM |
249 | ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid); |
250 | if (!ino) | |
27999f25 | 251 | goto out; |
43f1b3da | 252 | |
793b7fe5 TM |
253 | pnfs_layoutcommit_inode(ino, false); |
254 | ||
7c5d1875 CH |
255 | |
256 | spin_lock(&ino->i_lock); | |
7b410d9c TM |
257 | lo = NFS_I(ino)->layout; |
258 | if (!lo) { | |
259 | spin_unlock(&ino->i_lock); | |
260 | goto out; | |
261 | } | |
262 | pnfs_get_layout_hdr(lo); | |
793b7fe5 TM |
263 | rv = pnfs_check_callback_stateid(lo, &args->cbl_stateid); |
264 | if (rv != NFS_OK) | |
41c9127d | 265 | goto unlock; |
7c5d1875 | 266 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); |
7c5d1875 | 267 | |
fc7ff367 TM |
268 | /* |
269 | * Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return) | |
270 | */ | |
271 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { | |
272 | rv = NFS4ERR_DELAY; | |
273 | goto unlock; | |
274 | } | |
275 | ||
4b0934ba | 276 | if (pnfs_mark_matching_lsegs_return(lo, &free_me_list, |
6d597e17 JL |
277 | &args->cbl_range, |
278 | be32_to_cpu(args->cbl_stateid.seqid))) { | |
e0d92430 | 279 | rv = NFS4_OK; |
c88953d8 CH |
280 | goto unlock; |
281 | } | |
282 | ||
793b7fe5 TM |
283 | /* Embrace your forgetfulness! */ |
284 | rv = NFS4ERR_NOMATCHING_LAYOUT; | |
285 | ||
c88953d8 CH |
286 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { |
287 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, | |
288 | &args->cbl_range); | |
289 | } | |
290 | unlock: | |
43f1b3da FI |
291 | spin_unlock(&ino->i_lock); |
292 | pnfs_free_lseg_list(&free_me_list); | |
b20135d0 TM |
293 | /* Free all lsegs that are attached to commit buckets */ |
294 | nfs_commit_inode(ino, 0); | |
70c3bd2b | 295 | pnfs_put_layout_hdr(lo); |
7b410d9c | 296 | out: |
e07db907 TM |
297 | trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino, |
298 | &args->cbl_stateid, -rv); | |
7b410d9c | 299 | nfs_iput_and_deactive(ino); |
43f1b3da FI |
300 | return rv; |
301 | } | |
302 | ||
303 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
304 | struct cb_layoutrecallargs *args) | |
305 | { | |
fd9a8d71 | 306 | int stat; |
6382a441 | 307 | |
fd9a8d71 TM |
308 | if (args->cbl_recall_type == RETURN_FSID) |
309 | stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); | |
310 | else | |
311 | stat = pnfs_destroy_layouts_byclid(clp, true); | |
312 | if (stat != 0) | |
313 | return NFS4ERR_DELAY; | |
314 | return NFS4ERR_NOMATCHING_LAYOUT; | |
43f1b3da FI |
315 | } |
316 | ||
317 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
318 | struct cb_layoutrecallargs *args) | |
319 | { | |
43f1b3da | 320 | if (args->cbl_recall_type == RETURN_FILE) |
1a916ce0 AS |
321 | return initiate_file_draining(clp, args); |
322 | return initiate_bulk_draining(clp, args); | |
43f1b3da FI |
323 | } |
324 | ||
f2a62561 FI |
325 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
326 | void *dummy, struct cb_process_state *cps) | |
327 | { | |
5694a4f8 | 328 | u32 res = NFS4ERR_OP_NOT_IN_SESSION; |
43f1b3da FI |
329 | |
330 | if (cps->clp) | |
331 | res = do_callback_layoutrecall(cps->clp, args); | |
43f1b3da | 332 | return cpu_to_be32(res); |
f2a62561 FI |
333 | } |
334 | ||
36840370 AB |
335 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
336 | { | |
337 | struct cb_layoutrecallargs args; | |
338 | ||
339 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
340 | memset(&args, 0, sizeof(args)); | |
341 | args.cbl_recall_type = RETURN_ALL; | |
342 | /* FIXME we ignore errors, what should we do? */ | |
343 | do_callback_layoutrecall(clp, &args); | |
344 | } | |
345 | ||
1be5683b ME |
346 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
347 | void *dummy, struct cb_process_state *cps) | |
348 | { | |
349 | int i; | |
350 | __be32 res = 0; | |
351 | struct nfs_client *clp = cps->clp; | |
352 | struct nfs_server *server = NULL; | |
353 | ||
1be5683b ME |
354 | if (!clp) { |
355 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
356 | goto out; | |
357 | } | |
358 | ||
359 | for (i = 0; i < args->ndevs; i++) { | |
360 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
361 | ||
362 | if (!server || | |
363 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
364 | rcu_read_lock(); | |
365 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
366 | if (server->pnfs_curr_ld && | |
367 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
368 | rcu_read_unlock(); | |
369 | goto found; | |
370 | } | |
371 | rcu_read_unlock(); | |
1be5683b ME |
372 | continue; |
373 | } | |
374 | ||
375 | found: | |
35c8bb54 | 376 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
377 | } |
378 | ||
379 | out: | |
380 | kfree(args->devs); | |
1be5683b ME |
381 | return res; |
382 | } | |
383 | ||
68f3f901 RL |
384 | /* |
385 | * Validate the sequenceID sent by the server. | |
386 | * Return success if the sequenceID is one more than what we last saw on | |
387 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
388 | * | |
4911096f AA |
389 | * We don't yet implement a duplicate request cache, instead we set the |
390 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
391 | * since we only currently implement idempotent callbacks anyway. |
392 | * | |
393 | * We have a single slot backchannel at this time, so we don't bother | |
394 | * checking the used_slots bit array on the table. The lower layer guarantees | |
395 | * a single outstanding callback request at a time. | |
396 | */ | |
9733f0d9 | 397 | static __be32 |
5f83d86c TM |
398 | validate_seqid(const struct nfs4_slot_table *tbl, const struct nfs4_slot *slot, |
399 | const struct cb_sequenceargs * args) | |
68f3f901 | 400 | { |
f4f58ed1 | 401 | if (args->csa_slotid > tbl->server_highest_slotid) |
68f3f901 RL |
402 | return htonl(NFS4ERR_BADSLOT); |
403 | ||
68f3f901 | 404 | /* Replay */ |
b2f28bd7 | 405 | if (args->csa_sequenceid == slot->seq_nr) { |
810d82e6 | 406 | if (nfs4_test_locked_slot(tbl, slot->slot_nr)) |
f74a834a | 407 | return htonl(NFS4ERR_DELAY); |
4911096f AA |
408 | /* Signal process_op to set this error on next op */ |
409 | if (args->csa_cachethis == 0) | |
410 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
411 | ||
80f96427 TM |
412 | /* Liar! We never allowed you to set csa_cachethis != 0 */ |
413 | return htonl(NFS4ERR_SEQ_FALSE_RETRY); | |
68f3f901 RL |
414 | } |
415 | ||
416 | /* Wraparound */ | |
5f83d86c TM |
417 | if (unlikely(slot->seq_nr == 0xFFFFFFFFU)) { |
418 | if (args->csa_sequenceid == 1) | |
419 | return htonl(NFS4_OK); | |
420 | } else if (likely(args->csa_sequenceid == slot->seq_nr + 1)) | |
421 | return htonl(NFS4_OK); | |
68f3f901 RL |
422 | |
423 | /* Misordered request */ | |
424 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
425 | } | |
426 | ||
a7989c3e MS |
427 | /* |
428 | * For each referring call triple, check the session's slot table for | |
429 | * a match. If the slot is in use and the sequence numbers match, the | |
430 | * client is still waiting for a response to the original request. | |
431 | */ | |
432 | static bool referring_call_exists(struct nfs_client *clp, | |
433 | uint32_t nrclists, | |
434 | struct referring_call_list *rclists) | |
435 | { | |
436 | bool status = 0; | |
437 | int i, j; | |
438 | struct nfs4_session *session; | |
439 | struct nfs4_slot_table *tbl; | |
440 | struct referring_call_list *rclist; | |
441 | struct referring_call *ref; | |
442 | ||
443 | /* | |
444 | * XXX When client trunking is implemented, this becomes | |
445 | * a session lookup from within the loop | |
446 | */ | |
447 | session = clp->cl_session; | |
448 | tbl = &session->fc_slot_table; | |
449 | ||
450 | for (i = 0; i < nrclists; i++) { | |
451 | rclist = &rclists[i]; | |
452 | if (memcmp(session->sess_id.data, | |
453 | rclist->rcl_sessionid.data, | |
454 | NFS4_MAX_SESSIONID_LEN) != 0) | |
455 | continue; | |
456 | ||
457 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
458 | ref = &rclist->rcl_refcalls[j]; | |
045d2a6d TM |
459 | status = nfs4_slot_wait_on_seqid(tbl, ref->rc_slotid, |
460 | ref->rc_sequenceid, HZ >> 1) < 0; | |
a7989c3e MS |
461 | if (status) |
462 | goto out; | |
463 | } | |
464 | } | |
465 | ||
466 | out: | |
467 | return status; | |
468 | } | |
469 | ||
9733f0d9 | 470 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
471 | struct cb_sequenceres *res, |
472 | struct cb_process_state *cps) | |
d49433e1 | 473 | { |
55a67399 | 474 | struct nfs4_slot_table *tbl; |
e937ee71 | 475 | struct nfs4_slot *slot; |
68f3f901 | 476 | struct nfs_client *clp; |
9733f0d9 | 477 | int i; |
778be232 | 478 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 479 | |
459de2ed BS |
480 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, |
481 | &args->csa_sessionid, cps->minorversion); | |
68f3f901 RL |
482 | if (clp == NULL) |
483 | goto out; | |
484 | ||
b1c0df5f TM |
485 | if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
486 | goto out; | |
e937ee71 | 487 | |
55a67399 TM |
488 | tbl = &clp->cl_session->bc_slot_table; |
489 | ||
e5003b2f TM |
490 | /* Set up res before grabbing the spinlock */ |
491 | memcpy(&res->csr_sessionid, &args->csa_sessionid, | |
492 | sizeof(res->csr_sessionid)); | |
493 | res->csr_sequenceid = args->csa_sequenceid; | |
494 | res->csr_slotid = args->csa_slotid; | |
495 | ||
55a67399 | 496 | spin_lock(&tbl->slot_tbl_lock); |
42acd021 | 497 | /* state manager is resetting the session */ |
774d5f14 | 498 | if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
55a67399 | 499 | status = htonl(NFS4ERR_DELAY); |
910ac68a TM |
500 | /* Return NFS4ERR_BADSESSION if we're draining the session |
501 | * in order to reset it. | |
502 | */ | |
503 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
504 | status = htonl(NFS4ERR_BADSESSION); | |
4e54ab8d | 505 | goto out_unlock; |
42acd021 AA |
506 | } |
507 | ||
810d82e6 TM |
508 | status = htonl(NFS4ERR_BADSLOT); |
509 | slot = nfs4_lookup_slot(tbl, args->csa_slotid); | |
510 | if (IS_ERR(slot)) | |
511 | goto out_unlock; | |
e5003b2f TM |
512 | |
513 | res->csr_highestslotid = tbl->server_highest_slotid; | |
514 | res->csr_target_highestslotid = tbl->target_highest_slotid; | |
515 | ||
5f83d86c TM |
516 | status = validate_seqid(tbl, slot, args); |
517 | if (status) | |
518 | goto out_unlock; | |
810d82e6 TM |
519 | if (!nfs4_try_to_lock_slot(tbl, slot)) { |
520 | status = htonl(NFS4ERR_DELAY); | |
521 | goto out_unlock; | |
522 | } | |
523 | cps->slot = slot; | |
5f83d86c | 524 | |
80f96427 | 525 | /* The ca_maxresponsesize_cached is 0 with no DRC */ |
c2985d00 OK |
526 | if (args->csa_cachethis != 0) { |
527 | status = htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
528 | goto out_unlock; | |
529 | } | |
80f96427 | 530 | |
72ce2b3c MS |
531 | /* |
532 | * Check for pending referring calls. If a match is found, a | |
533 | * related callback was received before the response to the original | |
534 | * call. | |
535 | */ | |
536 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
537 | status = htonl(NFS4ERR_DELAY); | |
4e54ab8d | 538 | goto out_unlock; |
72ce2b3c MS |
539 | } |
540 | ||
e937ee71 KM |
541 | /* |
542 | * RFC5661 20.9.3 | |
543 | * If CB_SEQUENCE returns an error, then the state of the slot | |
544 | * (sequence ID, cached reply) MUST NOT change. | |
545 | */ | |
5f83d86c | 546 | slot->seq_nr = args->csa_sequenceid; |
4e54ab8d TM |
547 | out_unlock: |
548 | spin_unlock(&tbl->slot_tbl_lock); | |
e937ee71 | 549 | |
68f3f901 | 550 | out: |
2c4cdf8f | 551 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
552 | for (i = 0; i < args->csa_nrclists; i++) |
553 | kfree(args->csa_rclists[i].rcl_refcalls); | |
554 | kfree(args->csa_rclists); | |
555 | ||
c36fca52 AA |
556 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
557 | cps->drc_status = status; | |
558 | status = 0; | |
559 | } else | |
4911096f | 560 | res->csr_status = status; |
c36fca52 | 561 | |
2f92ae34 | 562 | trace_nfs4_cb_sequence(args, res, status); |
4911096f | 563 | return status; |
d49433e1 BH |
564 | } |
565 | ||
36840370 AB |
566 | static bool |
567 | validate_bitmap_values(unsigned long mask) | |
568 | { | |
569 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
570 | } | |
571 | ||
c36fca52 AA |
572 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
573 | struct cb_process_state *cps) | |
31f09607 | 574 | { |
9733f0d9 | 575 | __be32 status; |
31f09607 AB |
576 | fmode_t flags = 0; |
577 | ||
36840370 | 578 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 579 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
580 | goto out; |
581 | ||
2446ab60 | 582 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
c36fca52 | 583 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 584 | |
36840370 AB |
585 | status = cpu_to_be32(NFS4ERR_INVAL); |
586 | if (!validate_bitmap_values(args->craa_type_mask)) | |
587 | goto out; | |
588 | ||
589 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
590 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
591 | &args->craa_type_mask)) | |
592 | flags = FMODE_READ; | |
593 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
594 | &args->craa_type_mask)) | |
595 | flags |= FMODE_WRITE; | |
36840370 AB |
596 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
597 | &args->craa_type_mask)) | |
598 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 599 | if (flags) |
826e0013 | 600 | nfs_expire_unused_delegation_types(cps->clp, flags); |
31f09607 AB |
601 | out: |
602 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
603 | return status; | |
604 | } | |
b9efa1b2 AA |
605 | |
606 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
607 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
608 | struct cb_process_state *cps) | |
b9efa1b2 | 609 | { |
b9efa1b2 | 610 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 611 | __be32 status; |
b9efa1b2 AA |
612 | |
613 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 614 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
615 | goto out; |
616 | ||
e8d92382 | 617 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n", |
c36fca52 | 618 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
d5fb4ce3 | 619 | args->crsa_target_highest_slotid); |
b9efa1b2 | 620 | |
c36fca52 | 621 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 | 622 | |
bae0ac0e | 623 | status = htonl(NFS4_OK); |
b9efa1b2 | 624 | |
d5fb4ce3 | 625 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
3f10a6af | 626 | nfs41_notify_server(cps->clp); |
b9efa1b2 AA |
627 | out: |
628 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
629 | return status; | |
630 | } | |
db783688 JL |
631 | |
632 | __be32 nfs4_callback_notify_lock(struct cb_notify_lock_args *args, void *dummy, | |
633 | struct cb_process_state *cps) | |
634 | { | |
635 | if (!cps->clp) /* set in cb_sequence */ | |
636 | return htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
637 | ||
638 | dprintk_rcu("NFS: CB_NOTIFY_LOCK request from %s\n", | |
639 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
640 | ||
a1d617d8 JL |
641 | /* Don't wake anybody if the string looked bogus */ |
642 | if (args->cbnl_valid) | |
643 | __wake_up(&cps->clp->cl_lock_waitq, TASK_NORMAL, 0, args); | |
644 | ||
db783688 JL |
645 | return htonl(NFS4_OK); |
646 | } | |
d49433e1 | 647 | #endif /* CONFIG_NFS_V4_1 */ |