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 nfs_inode *nfsi;
30 struct inode *inode;
31
32 res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
33 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
34 goto out;
35
36 res->bitmap[0] = res->bitmap[1] = 0;
37 res->status = htonl(NFS4ERR_BADHANDLE);
38
39 dprintk_rcu("NFS: GETATTR callback request from %s\n",
40 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
41
42 inode = nfs_delegation_find_inode(cps->clp, &args->fh);
43 if (inode == NULL) {
44 trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL,
45 -ntohl(res->status));
46 goto out;
47 }
48 nfsi = NFS_I(inode);
49 rcu_read_lock();
50 delegation = rcu_dereference(nfsi->delegation);
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 iput(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 (inode == NULL) {
90 trace_nfs4_cb_recall(cps->clp, &args->fh, NULL,
91 &args->stateid, -ntohl(res));
92 goto out;
93 }
94 /* Set up a helper thread to actually return the delegation */
95 switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
96 case 0:
97 res = 0;
98 break;
99 case -ENOENT:
100 res = htonl(NFS4ERR_BAD_STATEID);
101 break;
102 default:
103 res = htonl(NFS4ERR_RESOURCE);
104 }
105 trace_nfs4_cb_recall(cps->clp, &args->fh, inode,
106 &args->stateid, -ntohl(res));
107 iput(inode);
108 out:
109 dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
110 return res;
111 }
112
113 #if defined(CONFIG_NFS_V4_1)
114
115 /*
116 * Lookup a layout inode by stateid
117 *
118 * Note: returns a refcount on the inode and superblock
119 */
nfs_layout_find_inode_by_stateid(struct nfs_client * clp,const nfs4_stateid * stateid)120 static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp,
121 const nfs4_stateid *stateid)
122 {
123 struct nfs_server *server;
124 struct inode *inode;
125 struct pnfs_layout_hdr *lo;
126
127 restart:
128 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
129 list_for_each_entry(lo, &server->layouts, plh_layouts) {
130 if (stateid != NULL &&
131 !nfs4_stateid_match_other(stateid, &lo->plh_stateid))
132 continue;
133 inode = igrab(lo->plh_inode);
134 if (!inode)
135 continue;
136 if (!nfs_sb_active(inode->i_sb)) {
137 rcu_read_unlock();
138 spin_unlock(&clp->cl_lock);
139 iput(inode);
140 spin_lock(&clp->cl_lock);
141 rcu_read_lock();
142 goto restart;
143 }
144 return inode;
145 }
146 }
147
148 return NULL;
149 }
150
151 /*
152 * Lookup a layout inode by filehandle.
153 *
154 * Note: returns a refcount on the inode and superblock
155 *
156 */
nfs_layout_find_inode_by_fh(struct nfs_client * clp,const struct nfs_fh * fh)157 static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp,
158 const struct nfs_fh *fh)
159 {
160 struct nfs_server *server;
161 struct nfs_inode *nfsi;
162 struct inode *inode;
163 struct pnfs_layout_hdr *lo;
164
165 restart:
166 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
167 list_for_each_entry(lo, &server->layouts, plh_layouts) {
168 nfsi = NFS_I(lo->plh_inode);
169 if (nfs_compare_fh(fh, &nfsi->fh))
170 continue;
171 if (nfsi->layout != lo)
172 continue;
173 inode = igrab(lo->plh_inode);
174 if (!inode)
175 continue;
176 if (!nfs_sb_active(inode->i_sb)) {
177 rcu_read_unlock();
178 spin_unlock(&clp->cl_lock);
179 iput(inode);
180 spin_lock(&clp->cl_lock);
181 rcu_read_lock();
182 goto restart;
183 }
184 return inode;
185 }
186 }
187
188 return NULL;
189 }
190
nfs_layout_find_inode(struct nfs_client * clp,const struct nfs_fh * fh,const nfs4_stateid * stateid)191 static struct inode *nfs_layout_find_inode(struct nfs_client *clp,
192 const struct nfs_fh *fh,
193 const nfs4_stateid *stateid)
194 {
195 struct inode *inode;
196
197 spin_lock(&clp->cl_lock);
198 rcu_read_lock();
199 inode = nfs_layout_find_inode_by_stateid(clp, stateid);
200 if (!inode)
201 inode = nfs_layout_find_inode_by_fh(clp, fh);
202 rcu_read_unlock();
203 spin_unlock(&clp->cl_lock);
204
205 return inode;
206 }
207
208 /*
209 * Enforce RFC5661 section 12.5.5.2.1. (Layout Recall and Return Sequencing)
210 */
pnfs_check_callback_stateid(struct pnfs_layout_hdr * lo,const nfs4_stateid * new)211 static u32 pnfs_check_callback_stateid(struct pnfs_layout_hdr *lo,
212 const nfs4_stateid *new)
213 {
214 u32 oldseq, newseq;
215
216 /* Is the stateid not initialised? */
217 if (!pnfs_layout_is_valid(lo))
218 return NFS4ERR_NOMATCHING_LAYOUT;
219
220 /* Mismatched stateid? */
221 if (!nfs4_stateid_match_other(&lo->plh_stateid, new))
222 return NFS4ERR_BAD_STATEID;
223
224 newseq = be32_to_cpu(new->seqid);
225 /* Are we already in a layout recall situation? */
226 if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) &&
227 lo->plh_return_seq != 0) {
228 if (newseq < lo->plh_return_seq)
229 return NFS4ERR_OLD_STATEID;
230 if (newseq > lo->plh_return_seq)
231 return NFS4ERR_DELAY;
232 goto out;
233 }
234
235 /* Check that the stateid matches what we think it should be. */
236 oldseq = be32_to_cpu(lo->plh_stateid.seqid);
237 if (newseq > oldseq + 1)
238 return NFS4ERR_DELAY;
239 /* Crazy server! */
240 if (newseq <= oldseq)
241 return NFS4ERR_OLD_STATEID;
242 out:
243 return NFS_OK;
244 }
245
initiate_file_draining(struct nfs_client * clp,struct cb_layoutrecallargs * args)246 static u32 initiate_file_draining(struct nfs_client *clp,
247 struct cb_layoutrecallargs *args)
248 {
249 struct inode *ino;
250 struct pnfs_layout_hdr *lo;
251 u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
252 LIST_HEAD(free_me_list);
253
254 ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid);
255 if (!ino)
256 goto out;
257
258 pnfs_layoutcommit_inode(ino, false);
259
260
261 spin_lock(&ino->i_lock);
262 lo = NFS_I(ino)->layout;
263 if (!lo) {
264 spin_unlock(&ino->i_lock);
265 goto out;
266 }
267 pnfs_get_layout_hdr(lo);
268 rv = pnfs_check_callback_stateid(lo, &args->cbl_stateid);
269 if (rv != NFS_OK)
270 goto unlock;
271 pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
272
273 /*
274 * Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return)
275 */
276 if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
277 rv = NFS4ERR_DELAY;
278 goto unlock;
279 }
280
281 if (pnfs_mark_matching_lsegs_return(lo, &free_me_list,
282 &args->cbl_range,
283 be32_to_cpu(args->cbl_stateid.seqid))) {
284 rv = NFS4_OK;
285 goto unlock;
286 }
287
288 /* Embrace your forgetfulness! */
289 rv = NFS4ERR_NOMATCHING_LAYOUT;
290
291 if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) {
292 NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo,
293 &args->cbl_range);
294 }
295 unlock:
296 spin_unlock(&ino->i_lock);
297 pnfs_free_lseg_list(&free_me_list);
298 /* Free all lsegs that are attached to commit buckets */
299 nfs_commit_inode(ino, 0);
300 pnfs_put_layout_hdr(lo);
301 out:
302 trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino,
303 &args->cbl_stateid, -rv);
304 nfs_iput_and_deactive(ino);
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 if (args->csa_slotid > tbl->server_highest_slotid)
409 return htonl(NFS4ERR_BADSLOT);
410
411 /* Replay */
412 if (args->csa_sequenceid == slot->seq_nr) {
413 if (nfs4_test_locked_slot(tbl, slot->slot_nr))
414 return htonl(NFS4ERR_DELAY);
415 /* Signal process_op to set this error on next op */
416 if (args->csa_cachethis == 0)
417 return htonl(NFS4ERR_RETRY_UNCACHED_REP);
418
419 /* Liar! We never allowed you to set csa_cachethis != 0 */
420 return htonl(NFS4ERR_SEQ_FALSE_RETRY);
421 }
422
423 /* Note: wraparound relies on seq_nr being of type u32 */
424 if (likely(args->csa_sequenceid == slot->seq_nr + 1))
425 return htonl(NFS4_OK);
426
427 /* Misordered request */
428 return htonl(NFS4ERR_SEQ_MISORDERED);
429 }
430
431 /*
432 * For each referring call triple, check the session's slot table for
433 * a match. If the slot is in use and the sequence numbers match, the
434 * client is still waiting for a response to the original request.
435 */
referring_call_exists(struct nfs_client * clp,uint32_t nrclists,struct referring_call_list * rclists,spinlock_t * lock)436 static int referring_call_exists(struct nfs_client *clp,
437 uint32_t nrclists,
438 struct referring_call_list *rclists,
439 spinlock_t *lock)
440 __releases(lock)
441 __acquires(lock)
442 {
443 int status = 0;
444 int i, j;
445 struct nfs4_session *session;
446 struct nfs4_slot_table *tbl;
447 struct referring_call_list *rclist;
448 struct referring_call *ref;
449
450 /*
451 * XXX When client trunking is implemented, this becomes
452 * a session lookup from within the loop
453 */
454 session = clp->cl_session;
455 tbl = &session->fc_slot_table;
456
457 for (i = 0; i < nrclists; i++) {
458 rclist = &rclists[i];
459 if (memcmp(session->sess_id.data,
460 rclist->rcl_sessionid.data,
461 NFS4_MAX_SESSIONID_LEN) != 0)
462 continue;
463
464 for (j = 0; j < rclist->rcl_nrefcalls; j++) {
465 ref = &rclist->rcl_refcalls[j];
466 spin_unlock(lock);
467 status = nfs4_slot_wait_on_seqid(tbl, ref->rc_slotid,
468 ref->rc_sequenceid, HZ >> 1) < 0;
469 spin_lock(lock);
470 if (status)
471 goto out;
472 }
473 }
474
475 out:
476 return status;
477 }
478
nfs4_callback_sequence(void * argp,void * resp,struct cb_process_state * cps)479 __be32 nfs4_callback_sequence(void *argp, void *resp,
480 struct cb_process_state *cps)
481 {
482 struct cb_sequenceargs *args = argp;
483 struct cb_sequenceres *res = resp;
484 struct nfs4_slot_table *tbl;
485 struct nfs4_slot *slot;
486 struct nfs_client *clp;
487 int i;
488 __be32 status = htonl(NFS4ERR_BADSESSION);
489
490 clp = nfs4_find_client_sessionid(cps->net, args->csa_addr,
491 &args->csa_sessionid, cps->minorversion);
492 if (clp == NULL)
493 goto out;
494
495 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
496 goto out;
497
498 tbl = &clp->cl_session->bc_slot_table;
499
500 /* Set up res before grabbing the spinlock */
501 memcpy(&res->csr_sessionid, &args->csa_sessionid,
502 sizeof(res->csr_sessionid));
503 res->csr_sequenceid = args->csa_sequenceid;
504 res->csr_slotid = args->csa_slotid;
505
506 spin_lock(&tbl->slot_tbl_lock);
507 /* state manager is resetting the session */
508 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
509 status = htonl(NFS4ERR_DELAY);
510 /* Return NFS4ERR_BADSESSION if we're draining the session
511 * in order to reset it.
512 */
513 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
514 status = htonl(NFS4ERR_BADSESSION);
515 goto out_unlock;
516 }
517
518 status = htonl(NFS4ERR_BADSLOT);
519 slot = nfs4_lookup_slot(tbl, args->csa_slotid);
520 if (IS_ERR(slot))
521 goto out_unlock;
522
523 res->csr_highestslotid = tbl->server_highest_slotid;
524 res->csr_target_highestslotid = tbl->target_highest_slotid;
525
526 status = validate_seqid(tbl, slot, args);
527 if (status)
528 goto out_unlock;
529 if (!nfs4_try_to_lock_slot(tbl, slot)) {
530 status = htonl(NFS4ERR_DELAY);
531 goto out_unlock;
532 }
533 cps->slot = slot;
534
535 /* The ca_maxresponsesize_cached is 0 with no DRC */
536 if (args->csa_cachethis != 0) {
537 status = htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);
538 goto out_unlock;
539 }
540
541 /*
542 * Check for pending referring calls. If a match is found, a
543 * related callback was received before the response to the original
544 * call.
545 */
546 if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists,
547 &tbl->slot_tbl_lock) < 0) {
548 status = htonl(NFS4ERR_DELAY);
549 goto out_unlock;
550 }
551
552 /*
553 * RFC5661 20.9.3
554 * If CB_SEQUENCE returns an error, then the state of the slot
555 * (sequence ID, cached reply) MUST NOT change.
556 */
557 slot->seq_nr = args->csa_sequenceid;
558 out_unlock:
559 spin_unlock(&tbl->slot_tbl_lock);
560
561 out:
562 cps->clp = clp; /* put in nfs4_callback_compound */
563 for (i = 0; i < args->csa_nrclists; i++)
564 kfree(args->csa_rclists[i].rcl_refcalls);
565 kfree(args->csa_rclists);
566
567 if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
568 cps->drc_status = status;
569 status = 0;
570 } else
571 res->csr_status = status;
572
573 trace_nfs4_cb_sequence(args, res, status);
574 return status;
575 }
576
577 static bool
validate_bitmap_values(unsigned long mask)578 validate_bitmap_values(unsigned long mask)
579 {
580 return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
581 }
582
nfs4_callback_recallany(void * argp,void * resp,struct cb_process_state * cps)583 __be32 nfs4_callback_recallany(void *argp, void *resp,
584 struct cb_process_state *cps)
585 {
586 struct cb_recallanyargs *args = argp;
587 __be32 status;
588 fmode_t flags = 0;
589
590 status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
591 if (!cps->clp) /* set in cb_sequence */
592 goto out;
593
594 dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
595 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
596
597 status = cpu_to_be32(NFS4ERR_INVAL);
598 if (!validate_bitmap_values(args->craa_type_mask))
599 goto out;
600
601 status = cpu_to_be32(NFS4_OK);
602 if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *)
603 &args->craa_type_mask))
604 flags = FMODE_READ;
605 if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *)
606 &args->craa_type_mask))
607 flags |= FMODE_WRITE;
608 if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *)
609 &args->craa_type_mask))
610 pnfs_recall_all_layouts(cps->clp);
611 if (flags)
612 nfs_expire_unused_delegation_types(cps->clp, flags);
613 out:
614 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
615 return status;
616 }
617
618 /* Reduce the fore channel's max_slots to the target value */
nfs4_callback_recallslot(void * argp,void * resp,struct cb_process_state * cps)619 __be32 nfs4_callback_recallslot(void *argp, void *resp,
620 struct cb_process_state *cps)
621 {
622 struct cb_recallslotargs *args = argp;
623 struct nfs4_slot_table *fc_tbl;
624 __be32 status;
625
626 status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
627 if (!cps->clp) /* set in cb_sequence */
628 goto out;
629
630 dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n",
631 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
632 args->crsa_target_highest_slotid);
633
634 fc_tbl = &cps->clp->cl_session->fc_slot_table;
635
636 status = htonl(NFS4_OK);
637
638 nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid);
639 nfs41_notify_server(cps->clp);
640 out:
641 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
642 return status;
643 }
644
nfs4_callback_notify_lock(void * argp,void * resp,struct cb_process_state * cps)645 __be32 nfs4_callback_notify_lock(void *argp, void *resp,
646 struct cb_process_state *cps)
647 {
648 struct cb_notify_lock_args *args = argp;
649
650 if (!cps->clp) /* set in cb_sequence */
651 return htonl(NFS4ERR_OP_NOT_IN_SESSION);
652
653 dprintk_rcu("NFS: CB_NOTIFY_LOCK request from %s\n",
654 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
655
656 /* Don't wake anybody if the string looked bogus */
657 if (args->cbnl_valid)
658 __wake_up(&cps->clp->cl_lock_waitq, TASK_NORMAL, 0, args);
659
660 return htonl(NFS4_OK);
661 }
662 #endif /* CONFIG_NFS_V4_1 */
663