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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> |
4ce79717 | 11 | #include "nfs4_fs.h" |
1da177e4 LT |
12 | #include "callback.h" |
13 | #include "delegation.h" | |
24c8dbbb | 14 | #include "internal.h" |
43f1b3da | 15 | #include "pnfs.h" |
1da177e4 | 16 | |
1d98fe67 | 17 | #ifdef NFS_DEBUG |
1da177e4 | 18 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
1d98fe67 | 19 | #endif |
c36fca52 AA |
20 | |
21 | __be32 nfs4_callback_getattr(struct cb_getattrargs *args, | |
22 | struct cb_getattrres *res, | |
23 | struct cb_process_state *cps) | |
1da177e4 | 24 | { |
1da177e4 LT |
25 | struct nfs_delegation *delegation; |
26 | struct nfs_inode *nfsi; | |
27 | struct inode *inode; | |
1d98fe67 | 28 | |
c36fca52 AA |
29 | res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
30 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
31 | goto out; | |
32 | ||
1da177e4 LT |
33 | res->bitmap[0] = res->bitmap[1] = 0; |
34 | res->status = htonl(NFS4ERR_BADHANDLE); | |
1d98fe67 CL |
35 | |
36 | dprintk("NFS: GETATTR callback request from %s\n", | |
c36fca52 | 37 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
1d98fe67 | 38 | |
c36fca52 | 39 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
1da177e4 | 40 | if (inode == NULL) |
c36fca52 | 41 | goto out; |
1da177e4 | 42 | nfsi = NFS_I(inode); |
761fe93c TM |
43 | rcu_read_lock(); |
44 | delegation = rcu_dereference(nfsi->delegation); | |
1da177e4 LT |
45 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
46 | goto out_iput; | |
47 | res->size = i_size_read(inode); | |
beb2a5ec TM |
48 | res->change_attr = delegation->change_attr; |
49 | if (nfsi->npages != 0) | |
50 | res->change_attr++; | |
1da177e4 LT |
51 | res->ctime = inode->i_ctime; |
52 | res->mtime = inode->i_mtime; | |
53 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & | |
54 | args->bitmap[0]; | |
55 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & | |
56 | args->bitmap[1]; | |
57 | res->status = 0; | |
58 | out_iput: | |
761fe93c | 59 | rcu_read_unlock(); |
1da177e4 | 60 | iput(inode); |
1da177e4 | 61 | out: |
3110ff80 | 62 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
1da177e4 LT |
63 | return res->status; |
64 | } | |
65 | ||
c36fca52 AA |
66 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
67 | struct cb_process_state *cps) | |
1da177e4 | 68 | { |
1da177e4 | 69 | struct inode *inode; |
e6f684f6 | 70 | __be32 res; |
1da177e4 | 71 | |
c36fca52 AA |
72 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
73 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
1da177e4 | 74 | goto out; |
1d98fe67 CL |
75 | |
76 | dprintk("NFS: RECALL callback request from %s\n", | |
c36fca52 AA |
77 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
78 | ||
79 | res = htonl(NFS4ERR_BADHANDLE); | |
80 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); | |
81 | if (inode == NULL) | |
82 | goto out; | |
83 | /* Set up a helper thread to actually return the delegation */ | |
84 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
85 | case 0: | |
86 | res = 0; | |
87 | break; | |
88 | case -ENOENT: | |
89 | if (res != 0) | |
90 | res = htonl(NFS4ERR_BAD_STATEID); | |
91 | break; | |
92 | default: | |
93 | res = htonl(NFS4ERR_RESOURCE); | |
94 | } | |
95 | iput(inode); | |
1da177e4 | 96 | out: |
3110ff80 | 97 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
1da177e4 LT |
98 | return res; |
99 | } | |
d49433e1 | 100 | |
2597641d AB |
101 | int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) |
102 | { | |
103 | if (delegation == NULL || memcmp(delegation->stateid.data, stateid->data, | |
104 | sizeof(delegation->stateid.data)) != 0) | |
105 | return 0; | |
106 | return 1; | |
107 | } | |
108 | ||
d49433e1 BH |
109 | #if defined(CONFIG_NFS_V4_1) |
110 | ||
d36b7cf7 BH |
111 | /* |
112 | * Lookup a layout by filehandle. | |
113 | * | |
114 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
115 | * Caller must put the layout hdr and the inode. | |
116 | * | |
117 | * TODO: keep track of all layouts (and delegations) in a hash table | |
118 | * hashed by filehandle. | |
119 | */ | |
120 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh) | |
43f1b3da | 121 | { |
6382a441 | 122 | struct nfs_server *server; |
43f1b3da | 123 | struct inode *ino; |
d36b7cf7 | 124 | struct pnfs_layout_hdr *lo; |
43f1b3da | 125 | |
6382a441 WAA |
126 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
127 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
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) | |
132 | continue; | |
6382a441 | 133 | get_layout_hdr(lo); |
d36b7cf7 | 134 | return lo; |
6382a441 | 135 | } |
43f1b3da | 136 | } |
d36b7cf7 BH |
137 | |
138 | return NULL; | |
139 | } | |
140 | ||
141 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh) | |
142 | { | |
143 | struct pnfs_layout_hdr *lo; | |
144 | ||
145 | spin_lock(&clp->cl_lock); | |
146 | rcu_read_lock(); | |
147 | lo = get_layout_by_fh_locked(clp, fh); | |
6382a441 | 148 | rcu_read_unlock(); |
43f1b3da | 149 | spin_unlock(&clp->cl_lock); |
6382a441 | 150 | |
d36b7cf7 BH |
151 | return lo; |
152 | } | |
153 | ||
154 | static u32 initiate_file_draining(struct nfs_client *clp, | |
155 | struct cb_layoutrecallargs *args) | |
156 | { | |
157 | struct inode *ino; | |
158 | struct pnfs_layout_hdr *lo; | |
159 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
160 | LIST_HEAD(free_me_list); | |
161 | ||
162 | lo = get_layout_by_fh(clp, &args->cbl_fh); | |
163 | if (!lo) | |
43f1b3da FI |
164 | return NFS4ERR_NOMATCHING_LAYOUT; |
165 | ||
d36b7cf7 | 166 | ino = lo->plh_inode; |
43f1b3da FI |
167 | spin_lock(&ino->i_lock); |
168 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
169 | mark_matching_lsegs_invalid(lo, &free_me_list, | |
778b5502 | 170 | &args->cbl_range)) |
43f1b3da FI |
171 | rv = NFS4ERR_DELAY; |
172 | else | |
173 | rv = NFS4ERR_NOMATCHING_LAYOUT; | |
174 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); | |
175 | spin_unlock(&ino->i_lock); | |
176 | pnfs_free_lseg_list(&free_me_list); | |
177 | put_layout_hdr(lo); | |
178 | iput(ino); | |
179 | return rv; | |
180 | } | |
181 | ||
182 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
183 | struct cb_layoutrecallargs *args) | |
184 | { | |
6382a441 | 185 | struct nfs_server *server; |
43f1b3da FI |
186 | struct pnfs_layout_hdr *lo; |
187 | struct inode *ino; | |
188 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
189 | struct pnfs_layout_hdr *tmp; | |
190 | LIST_HEAD(recall_list); | |
191 | LIST_HEAD(free_me_list); | |
192 | struct pnfs_layout_range range = { | |
193 | .iomode = IOMODE_ANY, | |
194 | .offset = 0, | |
195 | .length = NFS4_MAX_UINT64, | |
196 | }; | |
197 | ||
198 | spin_lock(&clp->cl_lock); | |
6382a441 WAA |
199 | rcu_read_lock(); |
200 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
43f1b3da | 201 | if ((args->cbl_recall_type == RETURN_FSID) && |
6382a441 WAA |
202 | memcmp(&server->fsid, &args->cbl_fsid, |
203 | sizeof(struct nfs_fsid))) | |
43f1b3da | 204 | continue; |
6382a441 WAA |
205 | |
206 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
207 | if (!igrab(lo->plh_inode)) | |
208 | continue; | |
209 | get_layout_hdr(lo); | |
210 | BUG_ON(!list_empty(&lo->plh_bulk_recall)); | |
211 | list_add(&lo->plh_bulk_recall, &recall_list); | |
212 | } | |
43f1b3da | 213 | } |
6382a441 | 214 | rcu_read_unlock(); |
43f1b3da | 215 | spin_unlock(&clp->cl_lock); |
6382a441 | 216 | |
43f1b3da FI |
217 | list_for_each_entry_safe(lo, tmp, |
218 | &recall_list, plh_bulk_recall) { | |
219 | ino = lo->plh_inode; | |
220 | spin_lock(&ino->i_lock); | |
221 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
778b5502 | 222 | if (mark_matching_lsegs_invalid(lo, &free_me_list, &range)) |
43f1b3da FI |
223 | rv = NFS4ERR_DELAY; |
224 | list_del_init(&lo->plh_bulk_recall); | |
225 | spin_unlock(&ino->i_lock); | |
f49f9baa | 226 | pnfs_free_lseg_list(&free_me_list); |
43f1b3da FI |
227 | put_layout_hdr(lo); |
228 | iput(ino); | |
229 | } | |
43f1b3da FI |
230 | return rv; |
231 | } | |
232 | ||
233 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
234 | struct cb_layoutrecallargs *args) | |
235 | { | |
236 | u32 res = NFS4ERR_DELAY; | |
237 | ||
238 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
239 | if (test_and_set_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state)) | |
240 | goto out; | |
241 | if (args->cbl_recall_type == RETURN_FILE) | |
242 | res = initiate_file_draining(clp, args); | |
243 | else | |
244 | res = initiate_bulk_draining(clp, args); | |
245 | clear_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state); | |
246 | out: | |
247 | dprintk("%s returning %i\n", __func__, res); | |
248 | return res; | |
249 | ||
250 | } | |
251 | ||
f2a62561 FI |
252 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
253 | void *dummy, struct cb_process_state *cps) | |
254 | { | |
43f1b3da FI |
255 | u32 res; |
256 | ||
257 | dprintk("%s: -->\n", __func__); | |
258 | ||
259 | if (cps->clp) | |
260 | res = do_callback_layoutrecall(cps->clp, args); | |
261 | else | |
262 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
263 | ||
264 | dprintk("%s: exit with status = %d\n", __func__, res); | |
265 | return cpu_to_be32(res); | |
f2a62561 FI |
266 | } |
267 | ||
36840370 AB |
268 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
269 | { | |
270 | struct cb_layoutrecallargs args; | |
271 | ||
272 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
273 | memset(&args, 0, sizeof(args)); | |
274 | args.cbl_recall_type = RETURN_ALL; | |
275 | /* FIXME we ignore errors, what should we do? */ | |
276 | do_callback_layoutrecall(clp, &args); | |
277 | } | |
278 | ||
1be5683b ME |
279 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
280 | void *dummy, struct cb_process_state *cps) | |
281 | { | |
282 | int i; | |
283 | __be32 res = 0; | |
284 | struct nfs_client *clp = cps->clp; | |
285 | struct nfs_server *server = NULL; | |
286 | ||
287 | dprintk("%s: -->\n", __func__); | |
288 | ||
289 | if (!clp) { | |
290 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
291 | goto out; | |
292 | } | |
293 | ||
294 | for (i = 0; i < args->ndevs; i++) { | |
295 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
296 | ||
297 | if (!server || | |
298 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
299 | rcu_read_lock(); | |
300 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
301 | if (server->pnfs_curr_ld && | |
302 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
303 | rcu_read_unlock(); | |
304 | goto found; | |
305 | } | |
306 | rcu_read_unlock(); | |
307 | dprintk("%s: layout type %u not found\n", | |
308 | __func__, dev->cbd_layout_type); | |
309 | continue; | |
310 | } | |
311 | ||
312 | found: | |
313 | if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) | |
314 | dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, " | |
315 | "deleting instead\n", __func__); | |
35c8bb54 | 316 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
317 | } |
318 | ||
319 | out: | |
320 | kfree(args->devs); | |
321 | dprintk("%s: exit with status = %u\n", | |
322 | __func__, be32_to_cpu(res)); | |
323 | return res; | |
324 | } | |
325 | ||
2597641d AB |
326 | int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) |
327 | { | |
328 | if (delegation == NULL) | |
329 | return 0; | |
330 | ||
94499252 | 331 | if (stateid->stateid.seqid != 0) |
2597641d | 332 | return 0; |
94499252 AB |
333 | if (memcmp(&delegation->stateid.stateid.other, |
334 | &stateid->stateid.other, | |
335 | NFS4_STATEID_OTHER_SIZE)) | |
2597641d AB |
336 | return 0; |
337 | ||
338 | return 1; | |
339 | } | |
340 | ||
68f3f901 RL |
341 | /* |
342 | * Validate the sequenceID sent by the server. | |
343 | * Return success if the sequenceID is one more than what we last saw on | |
344 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
345 | * | |
4911096f AA |
346 | * We don't yet implement a duplicate request cache, instead we set the |
347 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
348 | * since we only currently implement idempotent callbacks anyway. |
349 | * | |
350 | * We have a single slot backchannel at this time, so we don't bother | |
351 | * checking the used_slots bit array on the table. The lower layer guarantees | |
352 | * a single outstanding callback request at a time. | |
353 | */ | |
9733f0d9 | 354 | static __be32 |
b2f28bd7 | 355 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
356 | { |
357 | struct nfs4_slot *slot; | |
358 | ||
359 | dprintk("%s enter. slotid %d seqid %d\n", | |
b2f28bd7 | 360 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 361 | |
61f2e510 | 362 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
363 | return htonl(NFS4ERR_BADSLOT); |
364 | ||
b2f28bd7 | 365 | slot = tbl->slots + args->csa_slotid; |
68f3f901 RL |
366 | dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); |
367 | ||
368 | /* Normal */ | |
b2f28bd7 | 369 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { |
68f3f901 | 370 | slot->seq_nr++; |
55a67399 | 371 | goto out_ok; |
68f3f901 RL |
372 | } |
373 | ||
374 | /* Replay */ | |
b2f28bd7 | 375 | if (args->csa_sequenceid == slot->seq_nr) { |
4911096f | 376 | dprintk("%s seqid %d is a replay\n", |
b2f28bd7 | 377 | __func__, args->csa_sequenceid); |
4911096f AA |
378 | /* Signal process_op to set this error on next op */ |
379 | if (args->csa_cachethis == 0) | |
380 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
381 | ||
382 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
383 | else if (args->csa_cachethis == 1) | |
384 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
385 | } |
386 | ||
387 | /* Wraparound */ | |
b2f28bd7 | 388 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 | 389 | slot->seq_nr = 1; |
55a67399 | 390 | goto out_ok; |
68f3f901 RL |
391 | } |
392 | ||
393 | /* Misordered request */ | |
394 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
55a67399 TM |
395 | out_ok: |
396 | tbl->highest_used_slotid = args->csa_slotid; | |
397 | return htonl(NFS4_OK); | |
68f3f901 RL |
398 | } |
399 | ||
a7989c3e MS |
400 | /* |
401 | * For each referring call triple, check the session's slot table for | |
402 | * a match. If the slot is in use and the sequence numbers match, the | |
403 | * client is still waiting for a response to the original request. | |
404 | */ | |
405 | static bool referring_call_exists(struct nfs_client *clp, | |
406 | uint32_t nrclists, | |
407 | struct referring_call_list *rclists) | |
408 | { | |
409 | bool status = 0; | |
410 | int i, j; | |
411 | struct nfs4_session *session; | |
412 | struct nfs4_slot_table *tbl; | |
413 | struct referring_call_list *rclist; | |
414 | struct referring_call *ref; | |
415 | ||
416 | /* | |
417 | * XXX When client trunking is implemented, this becomes | |
418 | * a session lookup from within the loop | |
419 | */ | |
420 | session = clp->cl_session; | |
421 | tbl = &session->fc_slot_table; | |
422 | ||
423 | for (i = 0; i < nrclists; i++) { | |
424 | rclist = &rclists[i]; | |
425 | if (memcmp(session->sess_id.data, | |
426 | rclist->rcl_sessionid.data, | |
427 | NFS4_MAX_SESSIONID_LEN) != 0) | |
428 | continue; | |
429 | ||
430 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
431 | ref = &rclist->rcl_refcalls[j]; | |
432 | ||
433 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
434 | "slotid %u\n", __func__, | |
435 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
436 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
437 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
438 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
439 | ref->rc_sequenceid, ref->rc_slotid); | |
440 | ||
441 | spin_lock(&tbl->slot_tbl_lock); | |
442 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
443 | tbl->slots[ref->rc_slotid].seq_nr == | |
444 | ref->rc_sequenceid); | |
445 | spin_unlock(&tbl->slot_tbl_lock); | |
446 | if (status) | |
447 | goto out; | |
448 | } | |
449 | } | |
450 | ||
451 | out: | |
452 | return status; | |
453 | } | |
454 | ||
9733f0d9 | 455 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
456 | struct cb_sequenceres *res, |
457 | struct cb_process_state *cps) | |
d49433e1 | 458 | { |
55a67399 | 459 | struct nfs4_slot_table *tbl; |
68f3f901 | 460 | struct nfs_client *clp; |
9733f0d9 | 461 | int i; |
778be232 | 462 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 463 | |
c7add9a9 | 464 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid); |
68f3f901 RL |
465 | if (clp == NULL) |
466 | goto out; | |
467 | ||
55a67399 TM |
468 | tbl = &clp->cl_session->bc_slot_table; |
469 | ||
470 | spin_lock(&tbl->slot_tbl_lock); | |
42acd021 AA |
471 | /* state manager is resetting the session */ |
472 | if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { | |
55a67399 TM |
473 | spin_unlock(&tbl->slot_tbl_lock); |
474 | status = htonl(NFS4ERR_DELAY); | |
910ac68a TM |
475 | /* Return NFS4ERR_BADSESSION if we're draining the session |
476 | * in order to reset it. | |
477 | */ | |
478 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
479 | status = htonl(NFS4ERR_BADSESSION); | |
42acd021 AA |
480 | goto out; |
481 | } | |
482 | ||
b2f28bd7 | 483 | status = validate_seqid(&clp->cl_session->bc_slot_table, args); |
55a67399 | 484 | spin_unlock(&tbl->slot_tbl_lock); |
68f3f901 | 485 | if (status) |
c36fca52 | 486 | goto out; |
68f3f901 | 487 | |
55a67399 TM |
488 | cps->slotid = args->csa_slotid; |
489 | ||
72ce2b3c MS |
490 | /* |
491 | * Check for pending referring calls. If a match is found, a | |
492 | * related callback was received before the response to the original | |
493 | * call. | |
494 | */ | |
495 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
496 | status = htonl(NFS4ERR_DELAY); | |
c36fca52 | 497 | goto out; |
72ce2b3c MS |
498 | } |
499 | ||
d49433e1 BH |
500 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
501 | sizeof(res->csr_sessionid)); | |
502 | res->csr_sequenceid = args->csa_sequenceid; | |
503 | res->csr_slotid = args->csa_slotid; | |
504 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
505 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
506 | ||
68f3f901 | 507 | out: |
2c4cdf8f | 508 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
509 | for (i = 0; i < args->csa_nrclists; i++) |
510 | kfree(args->csa_rclists[i].rcl_refcalls); | |
511 | kfree(args->csa_rclists); | |
512 | ||
c36fca52 AA |
513 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
514 | cps->drc_status = status; | |
515 | status = 0; | |
516 | } else | |
4911096f | 517 | res->csr_status = status; |
c36fca52 | 518 | |
4911096f AA |
519 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
520 | ntohl(status), ntohl(res->csr_status)); | |
521 | return status; | |
d49433e1 BH |
522 | } |
523 | ||
36840370 AB |
524 | static bool |
525 | validate_bitmap_values(unsigned long mask) | |
526 | { | |
527 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
528 | } | |
529 | ||
c36fca52 AA |
530 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
531 | struct cb_process_state *cps) | |
31f09607 | 532 | { |
9733f0d9 | 533 | __be32 status; |
31f09607 AB |
534 | fmode_t flags = 0; |
535 | ||
36840370 | 536 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 537 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
538 | goto out; |
539 | ||
540 | dprintk("NFS: RECALL_ANY callback request from %s\n", | |
c36fca52 | 541 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 542 | |
36840370 AB |
543 | status = cpu_to_be32(NFS4ERR_INVAL); |
544 | if (!validate_bitmap_values(args->craa_type_mask)) | |
545 | goto out; | |
546 | ||
547 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
548 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
549 | &args->craa_type_mask)) | |
550 | flags = FMODE_READ; | |
551 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
552 | &args->craa_type_mask)) | |
553 | flags |= FMODE_WRITE; | |
36840370 AB |
554 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
555 | &args->craa_type_mask)) | |
556 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 557 | if (flags) |
c36fca52 | 558 | nfs_expire_all_delegation_types(cps->clp, flags); |
31f09607 AB |
559 | out: |
560 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
561 | return status; | |
562 | } | |
b9efa1b2 AA |
563 | |
564 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
565 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
566 | struct cb_process_state *cps) | |
b9efa1b2 | 567 | { |
b9efa1b2 | 568 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 569 | __be32 status; |
b9efa1b2 AA |
570 | |
571 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 572 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
573 | goto out; |
574 | ||
575 | dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", | |
c36fca52 | 576 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
b9efa1b2 AA |
577 | args->crsa_target_max_slots); |
578 | ||
c36fca52 | 579 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 AA |
580 | |
581 | status = htonl(NFS4ERR_BAD_HIGH_SLOT); | |
bae0ac0e | 582 | if (args->crsa_target_max_slots > fc_tbl->max_slots || |
b9efa1b2 | 583 | args->crsa_target_max_slots < 1) |
c36fca52 | 584 | goto out; |
bae0ac0e AA |
585 | |
586 | status = htonl(NFS4_OK); | |
587 | if (args->crsa_target_max_slots == fc_tbl->max_slots) | |
c36fca52 | 588 | goto out; |
b9efa1b2 AA |
589 | |
590 | fc_tbl->target_max_slots = args->crsa_target_max_slots; | |
c36fca52 | 591 | nfs41_handle_recall_slot(cps->clp); |
b9efa1b2 AA |
592 | out: |
593 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
594 | return status; | |
595 | } | |
d49433e1 | 596 | #endif /* CONFIG_NFS_V4_1 */ |