1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/nfs/callback_proc.c
4 *
5 * Copyright (C) 2004 Trond Myklebust
6 *
7 * NFSv4 callback procedures
8 */
9 #include <linux/nfs4.h>
10 #include <linux/nfs_fs.h>
11 #include <linux/slab.h>
12 #include <linux/rcupdate.h>
13 #include "nfs4_fs.h"
14 #include "callback.h"
15 #include "delegation.h"
16 #include "internal.h"
17 #include "pnfs.h"
18 #include "nfs4session.h"
19 #include "nfs4trace.h"
20
21 #define NFSDBG_FACILITY NFSDBG_CALLBACK
22
nfs4_callback_getattr(void * argp,void * resp,struct cb_process_state * cps)23 __be32 nfs4_callback_getattr(void *argp, void *resp,
24 struct cb_process_state *cps)
25 {
26 struct cb_getattrargs *args = argp;
27 struct cb_getattrres *res = resp;
28 struct nfs_delegation *delegation;
29 struct inode *inode;
30
31 res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
32 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
33 goto out;
34
35 res->bitmap[0] = res->bitmap[1] = 0;
36 res->status = htonl(NFS4ERR_BADHANDLE);
37
38 dprintk_rcu("NFS: GETATTR callback request from %s\n",
39 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
40
41 inode = nfs_delegation_find_inode(cps->clp, &args->fh);
42 if (IS_ERR(inode)) {
43 if (inode == ERR_PTR(-EAGAIN))
44 res->status = htonl(NFS4ERR_DELAY);
45 trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL,
46 -ntohl(res->status));
47 goto out;
48 }
49 rcu_read_lock();
50 delegation = nfs4_get_valid_delegation(inode);
51 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
52 goto out_iput;
53 res->size = i_size_read(inode);
54 res->change_attr = delegation->change_attr;
55 if (nfs_have_writebacks(inode))
56 res->change_attr++;
57 res->ctime = inode->i_ctime;
58 res->mtime = inode->i_mtime;
59 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
60 args->bitmap[0];
61 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
62 args->bitmap[1];
63 res->status = 0;
64 out_iput:
65 rcu_read_unlock();
66 trace_nfs4_cb_getattr(cps->clp, &args->fh, inode, -ntohl(res->status));
67 nfs_iput_and_deactive(inode);
68 out:
69 dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
70 return res->status;
71 }
72
nfs4_callback_recall(void * argp,void * resp,struct cb_process_state * cps)73 __be32 nfs4_callback_recall(void *argp, void *resp,
74 struct cb_process_state *cps)
75 {
76 struct cb_recallargs *args = argp;
77 struct inode *inode;
78 __be32 res;
79
80 res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
81 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
82 goto out;
83
84 dprintk_rcu("NFS: RECALL callback request from %s\n",
85 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
86
87 res = htonl(NFS4ERR_BADHANDLE);
88 inode = nfs_delegation_find_inode(cps->clp, &args->fh);
89 if (IS_ERR(inode)) {
90 if (inode == ERR_PTR(-EAGAIN))
91 res = htonl(NFS4ERR_DELAY);
92 trace_nfs4_cb_recall(cps->clp, &args->fh, NULL,
93 &args->stateid, -ntohl(res));
94 goto out;
95 }
96 /* Set up a helper thread to actually return the delegation */
97 switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
98 case 0:
99 res = 0;
100 break;
101 case -ENOENT:
102 res = htonl(NFS4ERR_BAD_STATEID);
103 break;
104 default:
105 res = htonl(NFS4ERR_RESOURCE);
106 }
107 trace_nfs4_cb_recall(cps->clp, &args->fh, inode,
108 &args->stateid, -ntohl(res));
109 nfs_iput_and_deactive(inode);
110 out:
111 dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
112 return res;
113 }
114
115 #if defined(CONFIG_NFS_V4_1)
116
117 /*
118 * Lookup a layout inode by stateid
119 *
120 * Note: returns a refcount on the inode and superblock
121 */
nfs_layout_find_inode_by_stateid(struct nfs_client * clp,const nfs4_stateid * stateid)122 static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp,
123 const nfs4_stateid *stateid)
124 __must_hold(RCU)
125 {
126 struct nfs_server *server;
127 struct inode *inode;
128 struct pnfs_layout_hdr *lo;
129
130 rcu_read_lock();
131 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
132 list_for_each_entry_rcu(lo, &server->layouts, plh_layouts) {
133 if (!pnfs_layout_is_valid(lo))
134 continue;
135 if (!nfs4_stateid_match_other(stateid, &lo->plh_stateid))
136 continue;
137 if (nfs_sb_active(server->super))
138 inode = igrab(lo->plh_inode);
139 else
140 inode = ERR_PTR(-EAGAIN);
141 rcu_read_unlock();
142 if (inode)
143 return inode;
144 nfs_sb_deactive(server->super);
145 return ERR_PTR(-EAGAIN);
146 }
147 }
148 rcu_read_unlock();
149 return ERR_PTR(-ENOENT);
150 }
151
152 /*
153 * Lookup a layout inode by filehandle.
154 *
155 * Note: returns a refcount on the inode and superblock
156 *
157 */
nfs_layout_find_inode_by_fh(struct nfs_client * clp,const struct nfs_fh * fh)158 static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp,
159 const struct nfs_fh *fh)
160 {
161 struct nfs_server *server;
162 struct nfs_inode *nfsi;
163 struct inode *inode;
164 struct pnfs_layout_hdr *lo;
165
166 rcu_read_lock();
167 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
168 list_for_each_entry_rcu(lo, &server->layouts, plh_layouts) {
169 nfsi = NFS_I(lo->plh_inode);
170 if (nfs_compare_fh(fh, &nfsi->fh))
171 continue;
172 if (nfsi->layout != lo)
173 continue;
174 if (nfs_sb_active(server->super))
175 inode = igrab(lo->plh_inode);
176 else
177 inode = ERR_PTR(-EAGAIN);
178 rcu_read_unlock();
179 if (inode)
180 return inode;
181 nfs_sb_deactive(server->super);
182 return ERR_PTR(-EAGAIN);
183 }
184 }
185 rcu_read_unlock();
186 return ERR_PTR(-ENOENT);
187 }
188
nfs_layout_find_inode(struct nfs_client * clp,const struct nfs_fh * fh,const nfs4_stateid * stateid)189 static struct inode *nfs_layout_find_inode(struct nfs_client *clp,
190 const struct nfs_fh *fh,
191 const nfs4_stateid *stateid)
192 {
193 struct inode *inode;
194
195 inode = nfs_layout_find_inode_by_stateid(clp, stateid);
196 if (inode == ERR_PTR(-ENOENT))
197 inode = nfs_layout_find_inode_by_fh(clp, fh);
198 return inode;
199 }
200
201 /*
202 * Enforce RFC5661 section 12.5.5.2.1. (Layout Recall and Return Sequencing)
203 */
pnfs_check_callback_stateid(struct pnfs_layout_hdr * lo,const nfs4_stateid * new)204 static u32 pnfs_check_callback_stateid(struct pnfs_layout_hdr *lo,
205 const nfs4_stateid *new)
206 {
207 u32 oldseq, newseq;
208
209 /* Is the stateid not initialised? */
210 if (!pnfs_layout_is_valid(lo))
211 return NFS4ERR_NOMATCHING_LAYOUT;
212
213 /* Mismatched stateid? */
214 if (!nfs4_stateid_match_other(&lo->plh_stateid, new))
215 return NFS4ERR_BAD_STATEID;
216
217 newseq = be32_to_cpu(new->seqid);
218 /* Are we already in a layout recall situation? */
219 if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) &&
220 lo->plh_return_seq != 0) {
221 if (newseq < lo->plh_return_seq)
222 return NFS4ERR_OLD_STATEID;
223 if (newseq > lo->plh_return_seq)
224 return NFS4ERR_DELAY;
225 goto out;
226 }
227
228 /* Check that the stateid matches what we think it should be. */
229 oldseq = be32_to_cpu(lo->plh_stateid.seqid);
230 if (newseq > oldseq + 1)
231 return NFS4ERR_DELAY;
232 /* Crazy server! */
233 if (newseq <= oldseq)
234 return NFS4ERR_OLD_STATEID;
235 out:
236 return NFS_OK;
237 }
238
initiate_file_draining(struct nfs_client * clp,struct cb_layoutrecallargs * args)239 static u32 initiate_file_draining(struct nfs_client *clp,
240 struct cb_layoutrecallargs *args)
241 {
242 struct inode *ino;
243 struct pnfs_layout_hdr *lo;
244 u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
245 LIST_HEAD(free_me_list);
246
247 ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid);
248 if (IS_ERR(ino)) {
249 if (ino == ERR_PTR(-EAGAIN))
250 rv = NFS4ERR_DELAY;
251 goto out_noput;
252 }
253
254 pnfs_layoutcommit_inode(ino, false);
255
256
257 spin_lock(&ino->i_lock);
258 lo = NFS_I(ino)->layout;
259 if (!lo) {
260 spin_unlock(&ino->i_lock);
261 goto out;
262 }
263 pnfs_get_layout_hdr(lo);
264 rv = pnfs_check_callback_stateid(lo, &args->cbl_stateid);
265 if (rv != NFS_OK)
266 goto unlock;
267
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
276 pnfs_set_layout_stateid(lo, &args->cbl_stateid, NULL, true);
277 switch (pnfs_mark_matching_lsegs_return(lo, &free_me_list,
278 &args->cbl_range,
279 be32_to_cpu(args->cbl_stateid.seqid))) {
280 case 0:
281 case -EBUSY:
282 /* There are layout segments that need to be returned */
283 rv = NFS4_OK;
284 break;
285 case -ENOENT:
286 /* Embrace your forgetfulness! */
287 rv = NFS4ERR_NOMATCHING_LAYOUT;
288
289 if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) {
290 NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo,
291 &args->cbl_range);
292 }
293 }
294 unlock:
295 spin_unlock(&ino->i_lock);
296 pnfs_free_lseg_list(&free_me_list);
297 /* Free all lsegs that are attached to commit buckets */
298 nfs_commit_inode(ino, 0);
299 pnfs_put_layout_hdr(lo);
300 out:
301 nfs_iput_and_deactive(ino);
302 out_noput:
303 trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino,
304 &args->cbl_stateid, -rv);
305 return rv;
306 }
307
initiate_bulk_draining(struct nfs_client * clp,struct cb_layoutrecallargs * args)308 static u32 initiate_bulk_draining(struct nfs_client *clp,
309 struct cb_layoutrecallargs *args)
310 {
311 int stat;
312
313 if (args->cbl_recall_type == RETURN_FSID)
314 stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true);
315 else
316 stat = pnfs_destroy_layouts_byclid(clp, true);
317 if (stat != 0)
318 return NFS4ERR_DELAY;
319 return NFS4ERR_NOMATCHING_LAYOUT;
320 }
321
do_callback_layoutrecall(struct nfs_client * clp,struct cb_layoutrecallargs * args)322 static u32 do_callback_layoutrecall(struct nfs_client *clp,
323 struct cb_layoutrecallargs *args)
324 {
325 if (args->cbl_recall_type == RETURN_FILE)
326 return initiate_file_draining(clp, args);
327 return initiate_bulk_draining(clp, args);
328 }
329
nfs4_callback_layoutrecall(void * argp,void * resp,struct cb_process_state * cps)330 __be32 nfs4_callback_layoutrecall(void *argp, void *resp,
331 struct cb_process_state *cps)
332 {
333 struct cb_layoutrecallargs *args = argp;
334 u32 res = NFS4ERR_OP_NOT_IN_SESSION;
335
336 if (cps->clp)
337 res = do_callback_layoutrecall(cps->clp, args);
338 return cpu_to_be32(res);
339 }
340
pnfs_recall_all_layouts(struct nfs_client * clp)341 static void pnfs_recall_all_layouts(struct nfs_client *clp)
342 {
343 struct cb_layoutrecallargs args;
344
345 /* Pretend we got a CB_LAYOUTRECALL(ALL) */
346 memset(&args, 0, sizeof(args));
347 args.cbl_recall_type = RETURN_ALL;
348 /* FIXME we ignore errors, what should we do? */
349 do_callback_layoutrecall(clp, &args);
350 }
351
nfs4_callback_devicenotify(void * argp,void * resp,struct cb_process_state * cps)352 __be32 nfs4_callback_devicenotify(void *argp, void *resp,
353 struct cb_process_state *cps)
354 {
355 struct cb_devicenotifyargs *args = argp;
356 int i;
357 __be32 res = 0;
358 struct nfs_client *clp = cps->clp;
359 struct nfs_server *server = NULL;
360
361 if (!clp) {
362 res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
363 goto out;
364 }
365
366 for (i = 0; i < args->ndevs; i++) {
367 struct cb_devicenotifyitem *dev = &args->devs[i];
368
369 if (!server ||
370 server->pnfs_curr_ld->id != dev->cbd_layout_type) {
371 rcu_read_lock();
372 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
373 if (server->pnfs_curr_ld &&
374 server->pnfs_curr_ld->id == dev->cbd_layout_type) {
375 rcu_read_unlock();
376 goto found;
377 }
378 rcu_read_unlock();
379 continue;
380 }
381
382 found:
383 nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
384 }
385
386 out:
387 kfree(args->devs);
388 return res;
389 }
390
391 /*
392 * Validate the sequenceID sent by the server.
393 * Return success if the sequenceID is one more than what we last saw on
394 * this slot, accounting for wraparound. Increments the slot's sequence.
395 *
396 * We don't yet implement a duplicate request cache, instead we set the
397 * back channel ca_maxresponsesize_cached to zero. This is OK for now
398 * since we only currently implement idempotent callbacks anyway.
399 *
400 * We have a single slot backchannel at this time, so we don't bother
401 * checking the used_slots bit array on the table. The lower layer guarantees
402 * a single outstanding callback request at a time.
403 */
404 static __be32
validate_seqid(const struct nfs4_slot_table * tbl,const struct nfs4_slot * slot,const struct cb_sequenceargs * args)405 validate_seqid(const struct nfs4_slot_table *tbl, const struct nfs4_slot *slot,
406 const struct cb_sequenceargs * args)
407 {
408 __be32 ret;
409
410 ret = cpu_to_be32(NFS4ERR_BADSLOT);
411 if (args->csa_slotid > tbl->server_highest_slotid)
412 goto out_err;
413
414 /* Replay */
415 if (args->csa_sequenceid == slot->seq_nr) {
416 ret = cpu_to_be32(NFS4ERR_DELAY);
417 if (nfs4_test_locked_slot(tbl, slot->slot_nr))
418 goto out_err;
419
420 /* Signal process_op to set this error on next op */
421 ret = cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP);
422 if (args->csa_cachethis == 0)
423 goto out_err;
424
425 /* Liar! We never allowed you to set csa_cachethis != 0 */
426 ret = cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY);
427 goto out_err;
428 }
429
430 /* Note: wraparound relies on seq_nr being of type u32 */
431 /* Misordered request */
432 ret = cpu_to_be32(NFS4ERR_SEQ_MISORDERED);
433 if (args->csa_sequenceid != slot->seq_nr + 1)
434 goto out_err;
435
436 return cpu_to_be32(NFS4_OK);
437
438 out_err:
439 trace_nfs4_cb_seqid_err(args, ret);
440 return ret;
441 }
442
443 /*
444 * For each referring call triple, check the session's slot table for
445 * a match. If the slot is in use and the sequence numbers match, the
446 * client is still waiting for a response to the original request.
447 */
referring_call_exists(struct nfs_client * clp,uint32_t nrclists,struct referring_call_list * rclists,spinlock_t * lock)448 static int referring_call_exists(struct nfs_client *clp,
449 uint32_t nrclists,
450 struct referring_call_list *rclists,
451 spinlock_t *lock)
452 __releases(lock)
453 __acquires(lock)
454 {
455 int status = 0;
456 int i, j;
457 struct nfs4_session *session;
458 struct nfs4_slot_table *tbl;
459 struct referring_call_list *rclist;
460 struct referring_call *ref;
461
462 /*
463 * XXX When client trunking is implemented, this becomes
464 * a session lookup from within the loop
465 */
466 session = clp->cl_session;
467 tbl = &session->fc_slot_table;
468
469 for (i = 0; i < nrclists; i++) {
470 rclist = &rclists[i];
471 if (memcmp(session->sess_id.data,
472 rclist->rcl_sessionid.data,
473 NFS4_MAX_SESSIONID_LEN) != 0)
474 continue;
475
476 for (j = 0; j < rclist->rcl_nrefcalls; j++) {
477 ref = &rclist->rcl_refcalls[j];
478 spin_unlock(lock);
479 status = nfs4_slot_wait_on_seqid(tbl, ref->rc_slotid,
480 ref->rc_sequenceid, HZ >> 1) < 0;
481 spin_lock(lock);
482 if (status)
483 goto out;
484 }
485 }
486
487 out:
488 return status;
489 }
490
nfs4_callback_sequence(void * argp,void * resp,struct cb_process_state * cps)491 __be32 nfs4_callback_sequence(void *argp, void *resp,
492 struct cb_process_state *cps)
493 {
494 struct cb_sequenceargs *args = argp;
495 struct cb_sequenceres *res = resp;
496 struct nfs4_slot_table *tbl;
497 struct nfs4_slot *slot;
498 struct nfs_client *clp;
499 int i;
500 __be32 status = htonl(NFS4ERR_BADSESSION);
501
502 clp = nfs4_find_client_sessionid(cps->net, args->csa_addr,
503 &args->csa_sessionid, cps->minorversion);
504 if (clp == NULL)
505 goto out;
506
507 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
508 goto out;
509
510 tbl = &clp->cl_session->bc_slot_table;
511
512 /* Set up res before grabbing the spinlock */
513 memcpy(&res->csr_sessionid, &args->csa_sessionid,
514 sizeof(res->csr_sessionid));
515 res->csr_sequenceid = args->csa_sequenceid;
516 res->csr_slotid = args->csa_slotid;
517
518 spin_lock(&tbl->slot_tbl_lock);
519 /* state manager is resetting the session */
520 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
521 status = htonl(NFS4ERR_DELAY);
522 /* Return NFS4ERR_BADSESSION if we're draining the session
523 * in order to reset it.
524 */
525 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
526 status = htonl(NFS4ERR_BADSESSION);
527 goto out_unlock;
528 }
529
530 status = htonl(NFS4ERR_BADSLOT);
531 slot = nfs4_lookup_slot(tbl, args->csa_slotid);
532 if (IS_ERR(slot))
533 goto out_unlock;
534
535 res->csr_highestslotid = tbl->server_highest_slotid;
536 res->csr_target_highestslotid = tbl->target_highest_slotid;
537
538 status = validate_seqid(tbl, slot, args);
539 if (status)
540 goto out_unlock;
541 if (!nfs4_try_to_lock_slot(tbl, slot)) {
542 status = htonl(NFS4ERR_DELAY);
543 goto out_unlock;
544 }
545 cps->slot = slot;
546
547 /* The ca_maxresponsesize_cached is 0 with no DRC */
548 if (args->csa_cachethis != 0) {
549 status = htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);
550 goto out_unlock;
551 }
552
553 /*
554 * Check for pending referring calls. If a match is found, a
555 * related callback was received before the response to the original
556 * call.
557 */
558 if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists,
559 &tbl->slot_tbl_lock) < 0) {
560 status = htonl(NFS4ERR_DELAY);
561 goto out_unlock;
562 }
563
564 /*
565 * RFC5661 20.9.3
566 * If CB_SEQUENCE returns an error, then the state of the slot
567 * (sequence ID, cached reply) MUST NOT change.
568 */
569 slot->seq_nr = args->csa_sequenceid;
570 out_unlock:
571 spin_unlock(&tbl->slot_tbl_lock);
572
573 out:
574 cps->clp = clp; /* put in nfs4_callback_compound */
575 for (i = 0; i < args->csa_nrclists; i++)
576 kfree(args->csa_rclists[i].rcl_refcalls);
577 kfree(args->csa_rclists);
578
579 if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
580 cps->drc_status = status;
581 status = 0;
582 } else
583 res->csr_status = status;
584
585 trace_nfs4_cb_sequence(args, res, status);
586 return status;
587 }
588
589 static bool
validate_bitmap_values(unsigned int mask)590 validate_bitmap_values(unsigned int mask)
591 {
592 return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
593 }
594
nfs4_callback_recallany(void * argp,void * resp,struct cb_process_state * cps)595 __be32 nfs4_callback_recallany(void *argp, void *resp,
596 struct cb_process_state *cps)
597 {
598 struct cb_recallanyargs *args = argp;
599 __be32 status;
600 fmode_t flags = 0;
601 bool schedule_manager = false;
602
603 status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
604 if (!cps->clp) /* set in cb_sequence */
605 goto out;
606
607 dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
608 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
609
610 status = cpu_to_be32(NFS4ERR_INVAL);
611 if (!validate_bitmap_values(args->craa_type_mask))
612 goto out;
613
614 status = cpu_to_be32(NFS4_OK);
615 if (args->craa_type_mask & BIT(RCA4_TYPE_MASK_RDATA_DLG))
616 flags = FMODE_READ;
617 if (args->craa_type_mask & BIT(RCA4_TYPE_MASK_WDATA_DLG))
618 flags |= FMODE_WRITE;
619 if (flags)
620 nfs_expire_unused_delegation_types(cps->clp, flags);
621
622 if (args->craa_type_mask & BIT(RCA4_TYPE_MASK_FILE_LAYOUT))
623 pnfs_recall_all_layouts(cps->clp);
624
625 if (args->craa_type_mask & BIT(PNFS_FF_RCA4_TYPE_MASK_READ)) {
626 set_bit(NFS4CLNT_RECALL_ANY_LAYOUT_READ, &cps->clp->cl_state);
627 schedule_manager = true;
628 }
629 if (args->craa_type_mask & BIT(PNFS_FF_RCA4_TYPE_MASK_RW)) {
630 set_bit(NFS4CLNT_RECALL_ANY_LAYOUT_RW, &cps->clp->cl_state);
631 schedule_manager = true;
632 }
633 if (schedule_manager)
634 nfs4_schedule_state_manager(cps->clp);
635
636 out:
637 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
638 return status;
639 }
640
641 /* Reduce the fore channel's max_slots to the target value */
nfs4_callback_recallslot(void * argp,void * resp,struct cb_process_state * cps)642 __be32 nfs4_callback_recallslot(void *argp, void *resp,
643 struct cb_process_state *cps)
644 {
645 struct cb_recallslotargs *args = argp;
646 struct nfs4_slot_table *fc_tbl;
647 __be32 status;
648
649 status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
650 if (!cps->clp) /* set in cb_sequence */
651 goto out;
652
653 dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n",
654 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
655 args->crsa_target_highest_slotid);
656
657 fc_tbl = &cps->clp->cl_session->fc_slot_table;
658
659 status = htonl(NFS4_OK);
660
661 nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid);
662 nfs41_notify_server(cps->clp);
663 out:
664 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
665 return status;
666 }
667
nfs4_callback_notify_lock(void * argp,void * resp,struct cb_process_state * cps)668 __be32 nfs4_callback_notify_lock(void *argp, void *resp,
669 struct cb_process_state *cps)
670 {
671 struct cb_notify_lock_args *args = argp;
672
673 if (!cps->clp) /* set in cb_sequence */
674 return htonl(NFS4ERR_OP_NOT_IN_SESSION);
675
676 dprintk_rcu("NFS: CB_NOTIFY_LOCK request from %s\n",
677 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
678
679 /* Don't wake anybody if the string looked bogus */
680 if (args->cbnl_valid)
681 __wake_up(&cps->clp->cl_lock_waitq, TASK_NORMAL, 0, args);
682
683 return htonl(NFS4_OK);
684 }
685 #endif /* CONFIG_NFS_V4_1 */
686 #ifdef CONFIG_NFS_V4_2
nfs4_copy_cb_args(struct nfs4_copy_state * cp_state,struct cb_offloadargs * args)687 static void nfs4_copy_cb_args(struct nfs4_copy_state *cp_state,
688 struct cb_offloadargs *args)
689 {
690 cp_state->count = args->wr_count;
691 cp_state->error = args->error;
692 if (!args->error) {
693 cp_state->verf.committed = args->wr_writeverf.committed;
694 memcpy(&cp_state->verf.verifier.data[0],
695 &args->wr_writeverf.verifier.data[0],
696 NFS4_VERIFIER_SIZE);
697 }
698 }
699
nfs4_callback_offload(void * data,void * dummy,struct cb_process_state * cps)700 __be32 nfs4_callback_offload(void *data, void *dummy,
701 struct cb_process_state *cps)
702 {
703 struct cb_offloadargs *args = data;
704 struct nfs_server *server;
705 struct nfs4_copy_state *copy, *tmp_copy;
706 bool found = false;
707
708 copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_NOFS);
709 if (!copy)
710 return htonl(NFS4ERR_SERVERFAULT);
711
712 spin_lock(&cps->clp->cl_lock);
713 rcu_read_lock();
714 list_for_each_entry_rcu(server, &cps->clp->cl_superblocks,
715 client_link) {
716 list_for_each_entry(tmp_copy, &server->ss_copies, copies) {
717 if (memcmp(args->coa_stateid.other,
718 tmp_copy->stateid.other,
719 sizeof(args->coa_stateid.other)))
720 continue;
721 nfs4_copy_cb_args(tmp_copy, args);
722 complete(&tmp_copy->completion);
723 found = true;
724 goto out;
725 }
726 }
727 out:
728 rcu_read_unlock();
729 if (!found) {
730 memcpy(©->stateid, &args->coa_stateid, NFS4_STATEID_SIZE);
731 nfs4_copy_cb_args(copy, args);
732 list_add_tail(©->copies, &cps->clp->pending_cb_stateids);
733 } else
734 kfree(copy);
735 spin_unlock(&cps->clp->cl_lock);
736
737 return 0;
738 }
739 #endif /* CONFIG_NFS_V4_2 */
740