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); | |
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 BH |
112 | /* |
113 | * Lookup a layout by filehandle. | |
114 | * | |
115 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
116 | * Caller must put the layout hdr and the inode. | |
117 | * | |
118 | * TODO: keep track of all layouts (and delegations) in a hash table | |
119 | * hashed by filehandle. | |
120 | */ | |
27999f25 | 121 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, |
793b7fe5 | 122 | struct nfs_fh *fh) |
43f1b3da | 123 | { |
6382a441 | 124 | struct nfs_server *server; |
793b7fe5 | 125 | struct nfs_inode *nfsi; |
43f1b3da | 126 | struct inode *ino; |
d36b7cf7 | 127 | struct pnfs_layout_hdr *lo; |
43f1b3da | 128 | |
793b7fe5 | 129 | restart: |
6382a441 WAA |
130 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
131 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
793b7fe5 TM |
132 | nfsi = NFS_I(lo->plh_inode); |
133 | if (nfs_compare_fh(fh, &nfsi->fh)) | |
27999f25 | 134 | continue; |
793b7fe5 | 135 | if (nfsi->layout != lo) |
6382a441 WAA |
136 | continue; |
137 | ino = igrab(lo->plh_inode); | |
138 | if (!ino) | |
9a7fe9e8 | 139 | break; |
9c626381 TM |
140 | spin_lock(&ino->i_lock); |
141 | /* Is this layout in the process of being freed? */ | |
793b7fe5 | 142 | if (nfsi->layout != lo) { |
9c626381 TM |
143 | spin_unlock(&ino->i_lock); |
144 | iput(ino); | |
793b7fe5 | 145 | goto restart; |
9c626381 | 146 | } |
70c3bd2b | 147 | pnfs_get_layout_hdr(lo); |
9c626381 | 148 | spin_unlock(&ino->i_lock); |
d36b7cf7 | 149 | return lo; |
6382a441 | 150 | } |
43f1b3da | 151 | } |
d36b7cf7 BH |
152 | |
153 | return NULL; | |
154 | } | |
155 | ||
27999f25 | 156 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, |
793b7fe5 | 157 | struct nfs_fh *fh) |
d36b7cf7 BH |
158 | { |
159 | struct pnfs_layout_hdr *lo; | |
160 | ||
161 | spin_lock(&clp->cl_lock); | |
162 | rcu_read_lock(); | |
793b7fe5 | 163 | lo = get_layout_by_fh_locked(clp, fh); |
6382a441 | 164 | rcu_read_unlock(); |
43f1b3da | 165 | spin_unlock(&clp->cl_lock); |
6382a441 | 166 | |
d36b7cf7 BH |
167 | return lo; |
168 | } | |
169 | ||
41c9127d TM |
170 | /* |
171 | * Enforce RFC5661 section 12.5.5.2.1. (Layout Recall and Return Sequencing) | |
172 | */ | |
793b7fe5 | 173 | static u32 pnfs_check_callback_stateid(struct pnfs_layout_hdr *lo, |
41c9127d TM |
174 | const nfs4_stateid *new) |
175 | { | |
176 | u32 oldseq, newseq; | |
177 | ||
793b7fe5 TM |
178 | /* Is the stateid still not initialised? */ |
179 | if (!pnfs_layout_is_valid(lo)) | |
180 | return NFS4ERR_DELAY; | |
181 | ||
182 | /* Mismatched stateid? */ | |
183 | if (!nfs4_stateid_match_other(&lo->plh_stateid, new)) | |
184 | return NFS4ERR_BAD_STATEID; | |
185 | ||
41c9127d | 186 | newseq = be32_to_cpu(new->seqid); |
793b7fe5 TM |
187 | /* Are we already in a layout recall situation? */ |
188 | if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags) && | |
189 | lo->plh_return_seq != 0) { | |
190 | if (newseq < lo->plh_return_seq) | |
191 | return NFS4ERR_OLD_STATEID; | |
192 | if (newseq > lo->plh_return_seq) | |
193 | return NFS4ERR_DELAY; | |
194 | goto out; | |
195 | } | |
41c9127d | 196 | |
793b7fe5 TM |
197 | /* Check that the stateid matches what we think it should be. */ |
198 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); | |
41c9127d | 199 | if (newseq > oldseq + 1) |
793b7fe5 TM |
200 | return NFS4ERR_DELAY; |
201 | /* Crazy server! */ | |
202 | if (newseq <= oldseq) | |
203 | return NFS4ERR_OLD_STATEID; | |
204 | out: | |
205 | return NFS_OK; | |
41c9127d TM |
206 | } |
207 | ||
d36b7cf7 BH |
208 | static u32 initiate_file_draining(struct nfs_client *clp, |
209 | struct cb_layoutrecallargs *args) | |
210 | { | |
211 | struct inode *ino; | |
212 | struct pnfs_layout_hdr *lo; | |
213 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
214 | LIST_HEAD(free_me_list); | |
215 | ||
793b7fe5 | 216 | lo = get_layout_by_fh(clp, &args->cbl_fh); |
e07db907 TM |
217 | if (!lo) { |
218 | trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, NULL, | |
219 | &args->cbl_stateid, -rv); | |
27999f25 | 220 | goto out; |
e07db907 | 221 | } |
43f1b3da | 222 | |
d36b7cf7 | 223 | ino = lo->plh_inode; |
793b7fe5 TM |
224 | pnfs_layoutcommit_inode(ino, false); |
225 | ||
7c5d1875 CH |
226 | |
227 | spin_lock(&ino->i_lock); | |
793b7fe5 TM |
228 | rv = pnfs_check_callback_stateid(lo, &args->cbl_stateid); |
229 | if (rv != NFS_OK) | |
41c9127d | 230 | goto unlock; |
7c5d1875 | 231 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); |
7c5d1875 | 232 | |
fc7ff367 TM |
233 | /* |
234 | * Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return) | |
235 | */ | |
236 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { | |
237 | rv = NFS4ERR_DELAY; | |
238 | goto unlock; | |
239 | } | |
240 | ||
4b0934ba | 241 | if (pnfs_mark_matching_lsegs_return(lo, &free_me_list, |
6d597e17 JL |
242 | &args->cbl_range, |
243 | be32_to_cpu(args->cbl_stateid.seqid))) { | |
e0d92430 | 244 | rv = NFS4_OK; |
c88953d8 CH |
245 | goto unlock; |
246 | } | |
247 | ||
793b7fe5 TM |
248 | /* Embrace your forgetfulness! */ |
249 | rv = NFS4ERR_NOMATCHING_LAYOUT; | |
250 | ||
c88953d8 CH |
251 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { |
252 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, | |
253 | &args->cbl_range); | |
254 | } | |
255 | unlock: | |
43f1b3da FI |
256 | spin_unlock(&ino->i_lock); |
257 | pnfs_free_lseg_list(&free_me_list); | |
b20135d0 TM |
258 | /* Free all lsegs that are attached to commit buckets */ |
259 | nfs_commit_inode(ino, 0); | |
70c3bd2b | 260 | pnfs_put_layout_hdr(lo); |
e07db907 TM |
261 | trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino, |
262 | &args->cbl_stateid, -rv); | |
43f1b3da | 263 | iput(ino); |
27999f25 | 264 | out: |
43f1b3da FI |
265 | return rv; |
266 | } | |
267 | ||
268 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
269 | struct cb_layoutrecallargs *args) | |
270 | { | |
fd9a8d71 | 271 | int stat; |
6382a441 | 272 | |
fd9a8d71 TM |
273 | if (args->cbl_recall_type == RETURN_FSID) |
274 | stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); | |
275 | else | |
276 | stat = pnfs_destroy_layouts_byclid(clp, true); | |
277 | if (stat != 0) | |
278 | return NFS4ERR_DELAY; | |
279 | return NFS4ERR_NOMATCHING_LAYOUT; | |
43f1b3da FI |
280 | } |
281 | ||
282 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
283 | struct cb_layoutrecallargs *args) | |
284 | { | |
0cb3284b | 285 | u32 res; |
43f1b3da FI |
286 | |
287 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
43f1b3da FI |
288 | if (args->cbl_recall_type == RETURN_FILE) |
289 | res = initiate_file_draining(clp, args); | |
290 | else | |
291 | res = initiate_bulk_draining(clp, args); | |
43f1b3da FI |
292 | dprintk("%s returning %i\n", __func__, res); |
293 | return res; | |
294 | ||
295 | } | |
296 | ||
f2a62561 FI |
297 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
298 | void *dummy, struct cb_process_state *cps) | |
299 | { | |
43f1b3da FI |
300 | u32 res; |
301 | ||
302 | dprintk("%s: -->\n", __func__); | |
303 | ||
304 | if (cps->clp) | |
305 | res = do_callback_layoutrecall(cps->clp, args); | |
306 | else | |
307 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
308 | ||
309 | dprintk("%s: exit with status = %d\n", __func__, res); | |
310 | return cpu_to_be32(res); | |
f2a62561 FI |
311 | } |
312 | ||
36840370 AB |
313 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
314 | { | |
315 | struct cb_layoutrecallargs args; | |
316 | ||
317 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
318 | memset(&args, 0, sizeof(args)); | |
319 | args.cbl_recall_type = RETURN_ALL; | |
320 | /* FIXME we ignore errors, what should we do? */ | |
321 | do_callback_layoutrecall(clp, &args); | |
322 | } | |
323 | ||
1be5683b ME |
324 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
325 | void *dummy, struct cb_process_state *cps) | |
326 | { | |
327 | int i; | |
328 | __be32 res = 0; | |
329 | struct nfs_client *clp = cps->clp; | |
330 | struct nfs_server *server = NULL; | |
331 | ||
332 | dprintk("%s: -->\n", __func__); | |
333 | ||
334 | if (!clp) { | |
335 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
336 | goto out; | |
337 | } | |
338 | ||
339 | for (i = 0; i < args->ndevs; i++) { | |
340 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
341 | ||
342 | if (!server || | |
343 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
344 | rcu_read_lock(); | |
345 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
346 | if (server->pnfs_curr_ld && | |
347 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
348 | rcu_read_unlock(); | |
349 | goto found; | |
350 | } | |
351 | rcu_read_unlock(); | |
352 | dprintk("%s: layout type %u not found\n", | |
353 | __func__, dev->cbd_layout_type); | |
354 | continue; | |
355 | } | |
356 | ||
357 | found: | |
35c8bb54 | 358 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
359 | } |
360 | ||
361 | out: | |
362 | kfree(args->devs); | |
363 | dprintk("%s: exit with status = %u\n", | |
364 | __func__, be32_to_cpu(res)); | |
365 | return res; | |
366 | } | |
367 | ||
68f3f901 RL |
368 | /* |
369 | * Validate the sequenceID sent by the server. | |
370 | * Return success if the sequenceID is one more than what we last saw on | |
371 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
372 | * | |
4911096f AA |
373 | * We don't yet implement a duplicate request cache, instead we set the |
374 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
375 | * since we only currently implement idempotent callbacks anyway. |
376 | * | |
377 | * We have a single slot backchannel at this time, so we don't bother | |
378 | * checking the used_slots bit array on the table. The lower layer guarantees | |
379 | * a single outstanding callback request at a time. | |
380 | */ | |
9733f0d9 | 381 | static __be32 |
5f83d86c TM |
382 | validate_seqid(const struct nfs4_slot_table *tbl, const struct nfs4_slot *slot, |
383 | const struct cb_sequenceargs * args) | |
68f3f901 | 384 | { |
5f83d86c TM |
385 | dprintk("%s enter. slotid %u seqid %u, slot table seqid: %u\n", |
386 | __func__, args->csa_slotid, args->csa_sequenceid, slot->seq_nr); | |
68f3f901 | 387 | |
f4f58ed1 | 388 | if (args->csa_slotid > tbl->server_highest_slotid) |
68f3f901 RL |
389 | return htonl(NFS4ERR_BADSLOT); |
390 | ||
68f3f901 | 391 | /* Replay */ |
b2f28bd7 | 392 | if (args->csa_sequenceid == slot->seq_nr) { |
e8d92382 | 393 | dprintk("%s seqid %u is a replay\n", |
b2f28bd7 | 394 | __func__, args->csa_sequenceid); |
810d82e6 | 395 | if (nfs4_test_locked_slot(tbl, slot->slot_nr)) |
f74a834a | 396 | return htonl(NFS4ERR_DELAY); |
4911096f AA |
397 | /* Signal process_op to set this error on next op */ |
398 | if (args->csa_cachethis == 0) | |
399 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
400 | ||
80f96427 TM |
401 | /* Liar! We never allowed you to set csa_cachethis != 0 */ |
402 | return htonl(NFS4ERR_SEQ_FALSE_RETRY); | |
68f3f901 RL |
403 | } |
404 | ||
405 | /* Wraparound */ | |
5f83d86c TM |
406 | if (unlikely(slot->seq_nr == 0xFFFFFFFFU)) { |
407 | if (args->csa_sequenceid == 1) | |
408 | return htonl(NFS4_OK); | |
409 | } else if (likely(args->csa_sequenceid == slot->seq_nr + 1)) | |
410 | return htonl(NFS4_OK); | |
68f3f901 RL |
411 | |
412 | /* Misordered request */ | |
413 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
414 | } | |
415 | ||
a7989c3e MS |
416 | /* |
417 | * For each referring call triple, check the session's slot table for | |
418 | * a match. If the slot is in use and the sequence numbers match, the | |
419 | * client is still waiting for a response to the original request. | |
420 | */ | |
421 | static bool referring_call_exists(struct nfs_client *clp, | |
422 | uint32_t nrclists, | |
423 | struct referring_call_list *rclists) | |
424 | { | |
425 | bool status = 0; | |
426 | int i, j; | |
427 | struct nfs4_session *session; | |
428 | struct nfs4_slot_table *tbl; | |
429 | struct referring_call_list *rclist; | |
430 | struct referring_call *ref; | |
431 | ||
432 | /* | |
433 | * XXX When client trunking is implemented, this becomes | |
434 | * a session lookup from within the loop | |
435 | */ | |
436 | session = clp->cl_session; | |
437 | tbl = &session->fc_slot_table; | |
438 | ||
439 | for (i = 0; i < nrclists; i++) { | |
440 | rclist = &rclists[i]; | |
441 | if (memcmp(session->sess_id.data, | |
442 | rclist->rcl_sessionid.data, | |
443 | NFS4_MAX_SESSIONID_LEN) != 0) | |
444 | continue; | |
445 | ||
446 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
447 | ref = &rclist->rcl_refcalls[j]; | |
448 | ||
449 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
450 | "slotid %u\n", __func__, | |
451 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
452 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
453 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
454 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
455 | ref->rc_sequenceid, ref->rc_slotid); | |
456 | ||
045d2a6d TM |
457 | status = nfs4_slot_wait_on_seqid(tbl, ref->rc_slotid, |
458 | ref->rc_sequenceid, HZ >> 1) < 0; | |
a7989c3e MS |
459 | if (status) |
460 | goto out; | |
461 | } | |
462 | } | |
463 | ||
464 | out: | |
465 | return status; | |
466 | } | |
467 | ||
9733f0d9 | 468 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
469 | struct cb_sequenceres *res, |
470 | struct cb_process_state *cps) | |
d49433e1 | 471 | { |
55a67399 | 472 | struct nfs4_slot_table *tbl; |
e937ee71 | 473 | struct nfs4_slot *slot; |
68f3f901 | 474 | struct nfs_client *clp; |
9733f0d9 | 475 | int i; |
778be232 | 476 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 477 | |
459de2ed BS |
478 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, |
479 | &args->csa_sessionid, cps->minorversion); | |
68f3f901 RL |
480 | if (clp == NULL) |
481 | goto out; | |
482 | ||
b1c0df5f TM |
483 | if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
484 | goto out; | |
e937ee71 | 485 | |
55a67399 TM |
486 | tbl = &clp->cl_session->bc_slot_table; |
487 | ||
e5003b2f TM |
488 | /* Set up res before grabbing the spinlock */ |
489 | memcpy(&res->csr_sessionid, &args->csa_sessionid, | |
490 | sizeof(res->csr_sessionid)); | |
491 | res->csr_sequenceid = args->csa_sequenceid; | |
492 | res->csr_slotid = args->csa_slotid; | |
493 | ||
55a67399 | 494 | spin_lock(&tbl->slot_tbl_lock); |
42acd021 | 495 | /* state manager is resetting the session */ |
774d5f14 | 496 | if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
55a67399 | 497 | status = htonl(NFS4ERR_DELAY); |
910ac68a TM |
498 | /* Return NFS4ERR_BADSESSION if we're draining the session |
499 | * in order to reset it. | |
500 | */ | |
501 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
502 | status = htonl(NFS4ERR_BADSESSION); | |
4e54ab8d | 503 | goto out_unlock; |
42acd021 AA |
504 | } |
505 | ||
810d82e6 TM |
506 | status = htonl(NFS4ERR_BADSLOT); |
507 | slot = nfs4_lookup_slot(tbl, args->csa_slotid); | |
508 | if (IS_ERR(slot)) | |
509 | goto out_unlock; | |
e5003b2f TM |
510 | |
511 | res->csr_highestslotid = tbl->server_highest_slotid; | |
512 | res->csr_target_highestslotid = tbl->target_highest_slotid; | |
513 | ||
5f83d86c TM |
514 | status = validate_seqid(tbl, slot, args); |
515 | if (status) | |
516 | goto out_unlock; | |
810d82e6 TM |
517 | if (!nfs4_try_to_lock_slot(tbl, slot)) { |
518 | status = htonl(NFS4ERR_DELAY); | |
519 | goto out_unlock; | |
520 | } | |
521 | cps->slot = slot; | |
5f83d86c | 522 | |
80f96427 | 523 | /* The ca_maxresponsesize_cached is 0 with no DRC */ |
c2985d00 OK |
524 | if (args->csa_cachethis != 0) { |
525 | status = htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
526 | goto out_unlock; | |
527 | } | |
80f96427 | 528 | |
72ce2b3c MS |
529 | /* |
530 | * Check for pending referring calls. If a match is found, a | |
531 | * related callback was received before the response to the original | |
532 | * call. | |
533 | */ | |
534 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
535 | status = htonl(NFS4ERR_DELAY); | |
4e54ab8d | 536 | goto out_unlock; |
72ce2b3c MS |
537 | } |
538 | ||
e937ee71 KM |
539 | /* |
540 | * RFC5661 20.9.3 | |
541 | * If CB_SEQUENCE returns an error, then the state of the slot | |
542 | * (sequence ID, cached reply) MUST NOT change. | |
543 | */ | |
5f83d86c | 544 | slot->seq_nr = args->csa_sequenceid; |
4e54ab8d TM |
545 | out_unlock: |
546 | spin_unlock(&tbl->slot_tbl_lock); | |
e937ee71 | 547 | |
68f3f901 | 548 | out: |
2c4cdf8f | 549 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
550 | for (i = 0; i < args->csa_nrclists; i++) |
551 | kfree(args->csa_rclists[i].rcl_refcalls); | |
552 | kfree(args->csa_rclists); | |
553 | ||
c36fca52 AA |
554 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
555 | cps->drc_status = status; | |
556 | status = 0; | |
557 | } else | |
4911096f | 558 | res->csr_status = status; |
c36fca52 | 559 | |
2f92ae34 | 560 | trace_nfs4_cb_sequence(args, res, status); |
4911096f AA |
561 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
562 | ntohl(status), ntohl(res->csr_status)); | |
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 | } | |
d49433e1 | 631 | #endif /* CONFIG_NFS_V4_1 */ |