Commit | Line | Data |
---|---|---|
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); | |
86 | if (inode == NULL) | |
87 | goto out; | |
88 | /* Set up a helper thread to actually return the delegation */ | |
89 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
90 | case 0: | |
91 | res = 0; | |
92 | break; | |
93 | case -ENOENT: | |
8e663f0e | 94 | res = htonl(NFS4ERR_BAD_STATEID); |
c36fca52 AA |
95 | break; |
96 | default: | |
97 | res = htonl(NFS4ERR_RESOURCE); | |
98 | } | |
ca8acf8d | 99 | trace_nfs4_recall_delegation(inode, -ntohl(res)); |
c36fca52 | 100 | iput(inode); |
1da177e4 | 101 | out: |
3110ff80 | 102 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
1da177e4 LT |
103 | return res; |
104 | } | |
d49433e1 BH |
105 | |
106 | #if defined(CONFIG_NFS_V4_1) | |
107 | ||
d36b7cf7 BH |
108 | /* |
109 | * Lookup a layout by filehandle. | |
110 | * | |
111 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
112 | * Caller must put the layout hdr and the inode. | |
113 | * | |
114 | * TODO: keep track of all layouts (and delegations) in a hash table | |
115 | * hashed by filehandle. | |
116 | */ | |
27999f25 TM |
117 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, |
118 | struct nfs_fh *fh, nfs4_stateid *stateid) | |
43f1b3da | 119 | { |
6382a441 | 120 | struct nfs_server *server; |
43f1b3da | 121 | struct inode *ino; |
d36b7cf7 | 122 | struct pnfs_layout_hdr *lo; |
43f1b3da | 123 | |
6382a441 WAA |
124 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
125 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
27999f25 TM |
126 | if (!nfs4_stateid_match_other(&lo->plh_stateid, stateid)) |
127 | continue; | |
d36b7cf7 | 128 | if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) |
6382a441 WAA |
129 | continue; |
130 | ino = igrab(lo->plh_inode); | |
131 | if (!ino) | |
9a7fe9e8 | 132 | break; |
9c626381 TM |
133 | spin_lock(&ino->i_lock); |
134 | /* Is this layout in the process of being freed? */ | |
135 | if (NFS_I(ino)->layout != lo) { | |
136 | spin_unlock(&ino->i_lock); | |
137 | iput(ino); | |
9a7fe9e8 | 138 | break; |
9c626381 | 139 | } |
70c3bd2b | 140 | pnfs_get_layout_hdr(lo); |
9c626381 | 141 | spin_unlock(&ino->i_lock); |
d36b7cf7 | 142 | return lo; |
6382a441 | 143 | } |
43f1b3da | 144 | } |
d36b7cf7 BH |
145 | |
146 | return NULL; | |
147 | } | |
148 | ||
27999f25 TM |
149 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, |
150 | struct nfs_fh *fh, nfs4_stateid *stateid) | |
d36b7cf7 BH |
151 | { |
152 | struct pnfs_layout_hdr *lo; | |
153 | ||
154 | spin_lock(&clp->cl_lock); | |
155 | rcu_read_lock(); | |
27999f25 | 156 | lo = get_layout_by_fh_locked(clp, fh, stateid); |
6382a441 | 157 | rcu_read_unlock(); |
43f1b3da | 158 | spin_unlock(&clp->cl_lock); |
6382a441 | 159 | |
d36b7cf7 BH |
160 | return lo; |
161 | } | |
162 | ||
163 | static u32 initiate_file_draining(struct nfs_client *clp, | |
164 | struct cb_layoutrecallargs *args) | |
165 | { | |
166 | struct inode *ino; | |
167 | struct pnfs_layout_hdr *lo; | |
168 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
169 | LIST_HEAD(free_me_list); | |
170 | ||
27999f25 | 171 | lo = get_layout_by_fh(clp, &args->cbl_fh, &args->cbl_stateid); |
d36b7cf7 | 172 | if (!lo) |
27999f25 | 173 | goto out; |
43f1b3da | 174 | |
d36b7cf7 | 175 | ino = lo->plh_inode; |
7c5d1875 CH |
176 | |
177 | spin_lock(&ino->i_lock); | |
178 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); | |
179 | spin_unlock(&ino->i_lock); | |
180 | ||
181 | pnfs_layoutcommit_inode(ino, false); | |
182 | ||
43f1b3da | 183 | spin_lock(&ino->i_lock); |
fc7ff367 TM |
184 | /* |
185 | * Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return) | |
186 | */ | |
187 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { | |
188 | rv = NFS4ERR_DELAY; | |
189 | goto unlock; | |
190 | } | |
191 | ||
192 | if (pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, | |
c88953d8 | 193 | &args->cbl_range)) { |
fc7ff367 TM |
194 | pnfs_mark_matching_lsegs_return(lo, |
195 | &free_me_list, | |
196 | &args->cbl_range); | |
43f1b3da | 197 | rv = NFS4ERR_DELAY; |
c88953d8 CH |
198 | goto unlock; |
199 | } | |
200 | ||
201 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
202 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, | |
203 | &args->cbl_range); | |
204 | } | |
0654cc72 | 205 | pnfs_mark_layout_returned_if_empty(lo); |
c88953d8 | 206 | unlock: |
43f1b3da FI |
207 | spin_unlock(&ino->i_lock); |
208 | pnfs_free_lseg_list(&free_me_list); | |
70c3bd2b | 209 | pnfs_put_layout_hdr(lo); |
249b2eef | 210 | trace_nfs4_cb_layoutrecall_inode(clp, &args->cbl_fh, ino, -rv); |
43f1b3da | 211 | iput(ino); |
27999f25 | 212 | out: |
43f1b3da FI |
213 | return rv; |
214 | } | |
215 | ||
216 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
217 | struct cb_layoutrecallargs *args) | |
218 | { | |
fd9a8d71 | 219 | int stat; |
6382a441 | 220 | |
fd9a8d71 TM |
221 | if (args->cbl_recall_type == RETURN_FSID) |
222 | stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); | |
223 | else | |
224 | stat = pnfs_destroy_layouts_byclid(clp, true); | |
225 | if (stat != 0) | |
226 | return NFS4ERR_DELAY; | |
227 | return NFS4ERR_NOMATCHING_LAYOUT; | |
43f1b3da FI |
228 | } |
229 | ||
230 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
231 | struct cb_layoutrecallargs *args) | |
232 | { | |
0cb3284b | 233 | u32 res; |
43f1b3da FI |
234 | |
235 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
43f1b3da FI |
236 | if (args->cbl_recall_type == RETURN_FILE) |
237 | res = initiate_file_draining(clp, args); | |
238 | else | |
239 | res = initiate_bulk_draining(clp, args); | |
43f1b3da FI |
240 | dprintk("%s returning %i\n", __func__, res); |
241 | return res; | |
242 | ||
243 | } | |
244 | ||
f2a62561 FI |
245 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
246 | void *dummy, struct cb_process_state *cps) | |
247 | { | |
43f1b3da FI |
248 | u32 res; |
249 | ||
250 | dprintk("%s: -->\n", __func__); | |
251 | ||
252 | if (cps->clp) | |
253 | res = do_callback_layoutrecall(cps->clp, args); | |
254 | else | |
255 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
256 | ||
257 | dprintk("%s: exit with status = %d\n", __func__, res); | |
258 | return cpu_to_be32(res); | |
f2a62561 FI |
259 | } |
260 | ||
36840370 AB |
261 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
262 | { | |
263 | struct cb_layoutrecallargs args; | |
264 | ||
265 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
266 | memset(&args, 0, sizeof(args)); | |
267 | args.cbl_recall_type = RETURN_ALL; | |
268 | /* FIXME we ignore errors, what should we do? */ | |
269 | do_callback_layoutrecall(clp, &args); | |
270 | } | |
271 | ||
1be5683b ME |
272 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
273 | void *dummy, struct cb_process_state *cps) | |
274 | { | |
275 | int i; | |
276 | __be32 res = 0; | |
277 | struct nfs_client *clp = cps->clp; | |
278 | struct nfs_server *server = NULL; | |
279 | ||
280 | dprintk("%s: -->\n", __func__); | |
281 | ||
282 | if (!clp) { | |
283 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
284 | goto out; | |
285 | } | |
286 | ||
287 | for (i = 0; i < args->ndevs; i++) { | |
288 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
289 | ||
290 | if (!server || | |
291 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
292 | rcu_read_lock(); | |
293 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
294 | if (server->pnfs_curr_ld && | |
295 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
296 | rcu_read_unlock(); | |
297 | goto found; | |
298 | } | |
299 | rcu_read_unlock(); | |
300 | dprintk("%s: layout type %u not found\n", | |
301 | __func__, dev->cbd_layout_type); | |
302 | continue; | |
303 | } | |
304 | ||
305 | found: | |
35c8bb54 | 306 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
307 | } |
308 | ||
309 | out: | |
310 | kfree(args->devs); | |
311 | dprintk("%s: exit with status = %u\n", | |
312 | __func__, be32_to_cpu(res)); | |
313 | return res; | |
314 | } | |
315 | ||
68f3f901 RL |
316 | /* |
317 | * Validate the sequenceID sent by the server. | |
318 | * Return success if the sequenceID is one more than what we last saw on | |
319 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
320 | * | |
4911096f AA |
321 | * We don't yet implement a duplicate request cache, instead we set the |
322 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
323 | * since we only currently implement idempotent callbacks anyway. |
324 | * | |
325 | * We have a single slot backchannel at this time, so we don't bother | |
326 | * checking the used_slots bit array on the table. The lower layer guarantees | |
327 | * a single outstanding callback request at a time. | |
328 | */ | |
9733f0d9 | 329 | static __be32 |
b2f28bd7 | 330 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
331 | { |
332 | struct nfs4_slot *slot; | |
333 | ||
e8d92382 | 334 | dprintk("%s enter. slotid %u seqid %u\n", |
b2f28bd7 | 335 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 336 | |
61f2e510 | 337 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
338 | return htonl(NFS4ERR_BADSLOT); |
339 | ||
b2f28bd7 | 340 | slot = tbl->slots + args->csa_slotid; |
e8d92382 | 341 | dprintk("%s slot table seqid: %u\n", __func__, slot->seq_nr); |
68f3f901 RL |
342 | |
343 | /* Normal */ | |
e937ee71 | 344 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) |
55a67399 | 345 | goto out_ok; |
68f3f901 RL |
346 | |
347 | /* Replay */ | |
b2f28bd7 | 348 | if (args->csa_sequenceid == slot->seq_nr) { |
e8d92382 | 349 | dprintk("%s seqid %u is a replay\n", |
b2f28bd7 | 350 | __func__, args->csa_sequenceid); |
4911096f AA |
351 | /* Signal process_op to set this error on next op */ |
352 | if (args->csa_cachethis == 0) | |
353 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
354 | ||
355 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
356 | else if (args->csa_cachethis == 1) | |
357 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
358 | } |
359 | ||
360 | /* Wraparound */ | |
b2f28bd7 | 361 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 | 362 | slot->seq_nr = 1; |
55a67399 | 363 | goto out_ok; |
68f3f901 RL |
364 | } |
365 | ||
366 | /* Misordered request */ | |
367 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
55a67399 TM |
368 | out_ok: |
369 | tbl->highest_used_slotid = args->csa_slotid; | |
370 | return htonl(NFS4_OK); | |
68f3f901 RL |
371 | } |
372 | ||
a7989c3e MS |
373 | /* |
374 | * For each referring call triple, check the session's slot table for | |
375 | * a match. If the slot is in use and the sequence numbers match, the | |
376 | * client is still waiting for a response to the original request. | |
377 | */ | |
378 | static bool referring_call_exists(struct nfs_client *clp, | |
379 | uint32_t nrclists, | |
380 | struct referring_call_list *rclists) | |
381 | { | |
382 | bool status = 0; | |
383 | int i, j; | |
384 | struct nfs4_session *session; | |
385 | struct nfs4_slot_table *tbl; | |
386 | struct referring_call_list *rclist; | |
387 | struct referring_call *ref; | |
388 | ||
389 | /* | |
390 | * XXX When client trunking is implemented, this becomes | |
391 | * a session lookup from within the loop | |
392 | */ | |
393 | session = clp->cl_session; | |
394 | tbl = &session->fc_slot_table; | |
395 | ||
396 | for (i = 0; i < nrclists; i++) { | |
397 | rclist = &rclists[i]; | |
398 | if (memcmp(session->sess_id.data, | |
399 | rclist->rcl_sessionid.data, | |
400 | NFS4_MAX_SESSIONID_LEN) != 0) | |
401 | continue; | |
402 | ||
403 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
404 | ref = &rclist->rcl_refcalls[j]; | |
405 | ||
406 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
407 | "slotid %u\n", __func__, | |
408 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
409 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
410 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
411 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
412 | ref->rc_sequenceid, ref->rc_slotid); | |
413 | ||
414 | spin_lock(&tbl->slot_tbl_lock); | |
415 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
416 | tbl->slots[ref->rc_slotid].seq_nr == | |
417 | ref->rc_sequenceid); | |
418 | spin_unlock(&tbl->slot_tbl_lock); | |
419 | if (status) | |
420 | goto out; | |
421 | } | |
422 | } | |
423 | ||
424 | out: | |
425 | return status; | |
426 | } | |
427 | ||
9733f0d9 | 428 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
429 | struct cb_sequenceres *res, |
430 | struct cb_process_state *cps) | |
d49433e1 | 431 | { |
55a67399 | 432 | struct nfs4_slot_table *tbl; |
e937ee71 | 433 | struct nfs4_slot *slot; |
68f3f901 | 434 | struct nfs_client *clp; |
9733f0d9 | 435 | int i; |
778be232 | 436 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 437 | |
459de2ed BS |
438 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, |
439 | &args->csa_sessionid, cps->minorversion); | |
68f3f901 RL |
440 | if (clp == NULL) |
441 | goto out; | |
442 | ||
b1c0df5f TM |
443 | if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
444 | goto out; | |
e937ee71 | 445 | |
55a67399 | 446 | tbl = &clp->cl_session->bc_slot_table; |
e937ee71 | 447 | slot = tbl->slots + args->csa_slotid; |
55a67399 TM |
448 | |
449 | spin_lock(&tbl->slot_tbl_lock); | |
42acd021 | 450 | /* state manager is resetting the session */ |
774d5f14 | 451 | if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
55a67399 | 452 | status = htonl(NFS4ERR_DELAY); |
910ac68a TM |
453 | /* Return NFS4ERR_BADSESSION if we're draining the session |
454 | * in order to reset it. | |
455 | */ | |
456 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
457 | status = htonl(NFS4ERR_BADSESSION); | |
4e54ab8d | 458 | goto out_unlock; |
42acd021 AA |
459 | } |
460 | ||
0579c8d2 KM |
461 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
462 | sizeof(res->csr_sessionid)); | |
463 | res->csr_sequenceid = args->csa_sequenceid; | |
464 | res->csr_slotid = args->csa_slotid; | |
465 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
466 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
467 | ||
e937ee71 | 468 | status = validate_seqid(tbl, args); |
68f3f901 | 469 | if (status) |
4e54ab8d | 470 | goto out_unlock; |
68f3f901 | 471 | |
55a67399 TM |
472 | cps->slotid = args->csa_slotid; |
473 | ||
72ce2b3c MS |
474 | /* |
475 | * Check for pending referring calls. If a match is found, a | |
476 | * related callback was received before the response to the original | |
477 | * call. | |
478 | */ | |
479 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
480 | status = htonl(NFS4ERR_DELAY); | |
4e54ab8d | 481 | goto out_unlock; |
72ce2b3c MS |
482 | } |
483 | ||
e937ee71 KM |
484 | /* |
485 | * RFC5661 20.9.3 | |
486 | * If CB_SEQUENCE returns an error, then the state of the slot | |
487 | * (sequence ID, cached reply) MUST NOT change. | |
488 | */ | |
489 | slot->seq_nr++; | |
4e54ab8d TM |
490 | out_unlock: |
491 | spin_unlock(&tbl->slot_tbl_lock); | |
e937ee71 | 492 | |
68f3f901 | 493 | out: |
2c4cdf8f | 494 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
495 | for (i = 0; i < args->csa_nrclists; i++) |
496 | kfree(args->csa_rclists[i].rcl_refcalls); | |
497 | kfree(args->csa_rclists); | |
498 | ||
c36fca52 AA |
499 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
500 | cps->drc_status = status; | |
501 | status = 0; | |
502 | } else | |
4911096f | 503 | res->csr_status = status; |
c36fca52 | 504 | |
2f92ae34 | 505 | trace_nfs4_cb_sequence(args, res, status); |
4911096f AA |
506 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
507 | ntohl(status), ntohl(res->csr_status)); | |
508 | return status; | |
d49433e1 BH |
509 | } |
510 | ||
36840370 AB |
511 | static bool |
512 | validate_bitmap_values(unsigned long mask) | |
513 | { | |
514 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
515 | } | |
516 | ||
c36fca52 AA |
517 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
518 | struct cb_process_state *cps) | |
31f09607 | 519 | { |
9733f0d9 | 520 | __be32 status; |
31f09607 AB |
521 | fmode_t flags = 0; |
522 | ||
36840370 | 523 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 524 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
525 | goto out; |
526 | ||
2446ab60 | 527 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
c36fca52 | 528 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 529 | |
36840370 AB |
530 | status = cpu_to_be32(NFS4ERR_INVAL); |
531 | if (!validate_bitmap_values(args->craa_type_mask)) | |
532 | goto out; | |
533 | ||
534 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
535 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
536 | &args->craa_type_mask)) | |
537 | flags = FMODE_READ; | |
538 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
539 | &args->craa_type_mask)) | |
540 | flags |= FMODE_WRITE; | |
36840370 AB |
541 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
542 | &args->craa_type_mask)) | |
543 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 544 | if (flags) |
826e0013 | 545 | nfs_expire_unused_delegation_types(cps->clp, flags); |
31f09607 AB |
546 | out: |
547 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
548 | return status; | |
549 | } | |
b9efa1b2 AA |
550 | |
551 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
552 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
553 | struct cb_process_state *cps) | |
b9efa1b2 | 554 | { |
b9efa1b2 | 555 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 556 | __be32 status; |
b9efa1b2 AA |
557 | |
558 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 559 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
560 | goto out; |
561 | ||
e8d92382 | 562 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n", |
c36fca52 | 563 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
d5fb4ce3 | 564 | args->crsa_target_highest_slotid); |
b9efa1b2 | 565 | |
c36fca52 | 566 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 | 567 | |
bae0ac0e | 568 | status = htonl(NFS4_OK); |
b9efa1b2 | 569 | |
d5fb4ce3 | 570 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
3f10a6af | 571 | nfs41_notify_server(cps->clp); |
b9efa1b2 AA |
572 | out: |
573 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
574 | return status; | |
575 | } | |
d49433e1 | 576 | #endif /* CONFIG_NFS_V4_1 */ |