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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> |
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" |
1da177e4 | 17 | |
1d98fe67 | 18 | #ifdef NFS_DEBUG |
1da177e4 | 19 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
1d98fe67 | 20 | #endif |
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); |
1da177e4 | 41 | if (inode == NULL) |
c36fca52 | 42 | goto out; |
1da177e4 | 43 | nfsi = NFS_I(inode); |
761fe93c TM |
44 | rcu_read_lock(); |
45 | delegation = rcu_dereference(nfsi->delegation); | |
1da177e4 LT |
46 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
47 | goto out_iput; | |
48 | res->size = i_size_read(inode); | |
beb2a5ec TM |
49 | res->change_attr = delegation->change_attr; |
50 | if (nfsi->npages != 0) | |
51 | res->change_attr++; | |
1da177e4 LT |
52 | res->ctime = inode->i_ctime; |
53 | res->mtime = inode->i_mtime; | |
54 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & | |
55 | args->bitmap[0]; | |
56 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & | |
57 | args->bitmap[1]; | |
58 | res->status = 0; | |
59 | out_iput: | |
761fe93c | 60 | rcu_read_unlock(); |
1da177e4 | 61 | iput(inode); |
1da177e4 | 62 | out: |
3110ff80 | 63 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
1da177e4 LT |
64 | return res->status; |
65 | } | |
66 | ||
c36fca52 AA |
67 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
68 | struct cb_process_state *cps) | |
1da177e4 | 69 | { |
1da177e4 | 70 | struct inode *inode; |
e6f684f6 | 71 | __be32 res; |
1da177e4 | 72 | |
c36fca52 AA |
73 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
74 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
1da177e4 | 75 | goto out; |
1d98fe67 | 76 | |
2446ab60 | 77 | dprintk_rcu("NFS: RECALL callback request from %s\n", |
c36fca52 AA |
78 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
79 | ||
80 | res = htonl(NFS4ERR_BADHANDLE); | |
81 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); | |
82 | if (inode == NULL) | |
83 | goto out; | |
84 | /* Set up a helper thread to actually return the delegation */ | |
85 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
86 | case 0: | |
87 | res = 0; | |
88 | break; | |
89 | case -ENOENT: | |
8e663f0e | 90 | res = htonl(NFS4ERR_BAD_STATEID); |
c36fca52 AA |
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 BH |
100 | |
101 | #if defined(CONFIG_NFS_V4_1) | |
102 | ||
d36b7cf7 BH |
103 | /* |
104 | * Lookup a layout by filehandle. | |
105 | * | |
106 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
107 | * Caller must put the layout hdr and the inode. | |
108 | * | |
109 | * TODO: keep track of all layouts (and delegations) in a hash table | |
110 | * hashed by filehandle. | |
111 | */ | |
112 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh) | |
43f1b3da | 113 | { |
6382a441 | 114 | struct nfs_server *server; |
43f1b3da | 115 | struct inode *ino; |
d36b7cf7 | 116 | struct pnfs_layout_hdr *lo; |
43f1b3da | 117 | |
6382a441 WAA |
118 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
119 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
d36b7cf7 | 120 | if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) |
6382a441 WAA |
121 | continue; |
122 | ino = igrab(lo->plh_inode); | |
123 | if (!ino) | |
124 | continue; | |
9c626381 TM |
125 | spin_lock(&ino->i_lock); |
126 | /* Is this layout in the process of being freed? */ | |
127 | if (NFS_I(ino)->layout != lo) { | |
128 | spin_unlock(&ino->i_lock); | |
129 | iput(ino); | |
130 | continue; | |
131 | } | |
70c3bd2b | 132 | pnfs_get_layout_hdr(lo); |
9c626381 | 133 | spin_unlock(&ino->i_lock); |
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) || | |
49a85061 | 169 | pnfs_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); | |
70c3bd2b | 177 | pnfs_put_layout_hdr(lo); |
43f1b3da FI |
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) { | |
9c626381 TM |
207 | ino = igrab(lo->plh_inode); |
208 | if (ino) | |
209 | continue; | |
210 | spin_lock(&ino->i_lock); | |
211 | /* Is this layout in the process of being freed? */ | |
212 | if (NFS_I(ino)->layout != lo) { | |
213 | spin_unlock(&ino->i_lock); | |
214 | iput(ino); | |
6382a441 | 215 | continue; |
9c626381 | 216 | } |
70c3bd2b | 217 | pnfs_get_layout_hdr(lo); |
9c626381 | 218 | spin_unlock(&ino->i_lock); |
6382a441 WAA |
219 | list_add(&lo->plh_bulk_recall, &recall_list); |
220 | } | |
43f1b3da | 221 | } |
6382a441 | 222 | rcu_read_unlock(); |
43f1b3da | 223 | spin_unlock(&clp->cl_lock); |
6382a441 | 224 | |
43f1b3da FI |
225 | list_for_each_entry_safe(lo, tmp, |
226 | &recall_list, plh_bulk_recall) { | |
227 | ino = lo->plh_inode; | |
228 | spin_lock(&ino->i_lock); | |
229 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
49a85061 | 230 | if (pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, &range)) |
43f1b3da FI |
231 | rv = NFS4ERR_DELAY; |
232 | list_del_init(&lo->plh_bulk_recall); | |
233 | spin_unlock(&ino->i_lock); | |
f49f9baa | 234 | pnfs_free_lseg_list(&free_me_list); |
70c3bd2b | 235 | pnfs_put_layout_hdr(lo); |
43f1b3da FI |
236 | iput(ino); |
237 | } | |
43f1b3da FI |
238 | return rv; |
239 | } | |
240 | ||
241 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
242 | struct cb_layoutrecallargs *args) | |
243 | { | |
0cb3284b | 244 | u32 res; |
43f1b3da FI |
245 | |
246 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
43f1b3da FI |
247 | if (args->cbl_recall_type == RETURN_FILE) |
248 | res = initiate_file_draining(clp, args); | |
249 | else | |
250 | res = initiate_bulk_draining(clp, args); | |
43f1b3da FI |
251 | dprintk("%s returning %i\n", __func__, res); |
252 | return res; | |
253 | ||
254 | } | |
255 | ||
f2a62561 FI |
256 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
257 | void *dummy, struct cb_process_state *cps) | |
258 | { | |
43f1b3da FI |
259 | u32 res; |
260 | ||
261 | dprintk("%s: -->\n", __func__); | |
262 | ||
263 | if (cps->clp) | |
264 | res = do_callback_layoutrecall(cps->clp, args); | |
265 | else | |
266 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
267 | ||
268 | dprintk("%s: exit with status = %d\n", __func__, res); | |
269 | return cpu_to_be32(res); | |
f2a62561 FI |
270 | } |
271 | ||
36840370 AB |
272 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
273 | { | |
274 | struct cb_layoutrecallargs args; | |
275 | ||
276 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
277 | memset(&args, 0, sizeof(args)); | |
278 | args.cbl_recall_type = RETURN_ALL; | |
279 | /* FIXME we ignore errors, what should we do? */ | |
280 | do_callback_layoutrecall(clp, &args); | |
281 | } | |
282 | ||
1be5683b ME |
283 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
284 | void *dummy, struct cb_process_state *cps) | |
285 | { | |
286 | int i; | |
287 | __be32 res = 0; | |
288 | struct nfs_client *clp = cps->clp; | |
289 | struct nfs_server *server = NULL; | |
290 | ||
291 | dprintk("%s: -->\n", __func__); | |
292 | ||
293 | if (!clp) { | |
294 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
295 | goto out; | |
296 | } | |
297 | ||
298 | for (i = 0; i < args->ndevs; i++) { | |
299 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
300 | ||
301 | if (!server || | |
302 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
303 | rcu_read_lock(); | |
304 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
305 | if (server->pnfs_curr_ld && | |
306 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
307 | rcu_read_unlock(); | |
308 | goto found; | |
309 | } | |
310 | rcu_read_unlock(); | |
311 | dprintk("%s: layout type %u not found\n", | |
312 | __func__, dev->cbd_layout_type); | |
313 | continue; | |
314 | } | |
315 | ||
316 | found: | |
317 | if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) | |
318 | dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, " | |
319 | "deleting instead\n", __func__); | |
35c8bb54 | 320 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
321 | } |
322 | ||
323 | out: | |
324 | kfree(args->devs); | |
325 | dprintk("%s: exit with status = %u\n", | |
326 | __func__, be32_to_cpu(res)); | |
327 | return res; | |
328 | } | |
329 | ||
68f3f901 RL |
330 | /* |
331 | * Validate the sequenceID sent by the server. | |
332 | * Return success if the sequenceID is one more than what we last saw on | |
333 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
334 | * | |
4911096f AA |
335 | * We don't yet implement a duplicate request cache, instead we set the |
336 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
337 | * since we only currently implement idempotent callbacks anyway. |
338 | * | |
339 | * We have a single slot backchannel at this time, so we don't bother | |
340 | * checking the used_slots bit array on the table. The lower layer guarantees | |
341 | * a single outstanding callback request at a time. | |
342 | */ | |
9733f0d9 | 343 | static __be32 |
b2f28bd7 | 344 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
345 | { |
346 | struct nfs4_slot *slot; | |
347 | ||
348 | dprintk("%s enter. slotid %d seqid %d\n", | |
b2f28bd7 | 349 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 350 | |
61f2e510 | 351 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
352 | return htonl(NFS4ERR_BADSLOT); |
353 | ||
b2f28bd7 | 354 | slot = tbl->slots + args->csa_slotid; |
68f3f901 RL |
355 | dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); |
356 | ||
357 | /* Normal */ | |
b2f28bd7 | 358 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { |
68f3f901 | 359 | slot->seq_nr++; |
55a67399 | 360 | goto out_ok; |
68f3f901 RL |
361 | } |
362 | ||
363 | /* Replay */ | |
b2f28bd7 | 364 | if (args->csa_sequenceid == slot->seq_nr) { |
4911096f | 365 | dprintk("%s seqid %d is a replay\n", |
b2f28bd7 | 366 | __func__, args->csa_sequenceid); |
4911096f AA |
367 | /* Signal process_op to set this error on next op */ |
368 | if (args->csa_cachethis == 0) | |
369 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
370 | ||
371 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
372 | else if (args->csa_cachethis == 1) | |
373 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
374 | } |
375 | ||
376 | /* Wraparound */ | |
b2f28bd7 | 377 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 | 378 | slot->seq_nr = 1; |
55a67399 | 379 | goto out_ok; |
68f3f901 RL |
380 | } |
381 | ||
382 | /* Misordered request */ | |
383 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
55a67399 TM |
384 | out_ok: |
385 | tbl->highest_used_slotid = args->csa_slotid; | |
386 | return htonl(NFS4_OK); | |
68f3f901 RL |
387 | } |
388 | ||
a7989c3e MS |
389 | /* |
390 | * For each referring call triple, check the session's slot table for | |
391 | * a match. If the slot is in use and the sequence numbers match, the | |
392 | * client is still waiting for a response to the original request. | |
393 | */ | |
394 | static bool referring_call_exists(struct nfs_client *clp, | |
395 | uint32_t nrclists, | |
396 | struct referring_call_list *rclists) | |
397 | { | |
398 | bool status = 0; | |
399 | int i, j; | |
400 | struct nfs4_session *session; | |
401 | struct nfs4_slot_table *tbl; | |
402 | struct referring_call_list *rclist; | |
403 | struct referring_call *ref; | |
404 | ||
405 | /* | |
406 | * XXX When client trunking is implemented, this becomes | |
407 | * a session lookup from within the loop | |
408 | */ | |
409 | session = clp->cl_session; | |
410 | tbl = &session->fc_slot_table; | |
411 | ||
412 | for (i = 0; i < nrclists; i++) { | |
413 | rclist = &rclists[i]; | |
414 | if (memcmp(session->sess_id.data, | |
415 | rclist->rcl_sessionid.data, | |
416 | NFS4_MAX_SESSIONID_LEN) != 0) | |
417 | continue; | |
418 | ||
419 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
420 | ref = &rclist->rcl_refcalls[j]; | |
421 | ||
422 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
423 | "slotid %u\n", __func__, | |
424 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
425 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
426 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
427 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
428 | ref->rc_sequenceid, ref->rc_slotid); | |
429 | ||
430 | spin_lock(&tbl->slot_tbl_lock); | |
431 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
432 | tbl->slots[ref->rc_slotid].seq_nr == | |
433 | ref->rc_sequenceid); | |
434 | spin_unlock(&tbl->slot_tbl_lock); | |
435 | if (status) | |
436 | goto out; | |
437 | } | |
438 | } | |
439 | ||
440 | out: | |
441 | return status; | |
442 | } | |
443 | ||
9733f0d9 | 444 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
445 | struct cb_sequenceres *res, |
446 | struct cb_process_state *cps) | |
d49433e1 | 447 | { |
55a67399 | 448 | struct nfs4_slot_table *tbl; |
68f3f901 | 449 | struct nfs_client *clp; |
9733f0d9 | 450 | int i; |
778be232 | 451 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 452 | |
c7add9a9 | 453 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid); |
68f3f901 RL |
454 | if (clp == NULL) |
455 | goto out; | |
456 | ||
55a67399 TM |
457 | tbl = &clp->cl_session->bc_slot_table; |
458 | ||
459 | spin_lock(&tbl->slot_tbl_lock); | |
42acd021 AA |
460 | /* state manager is resetting the session */ |
461 | if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { | |
55a67399 TM |
462 | spin_unlock(&tbl->slot_tbl_lock); |
463 | status = htonl(NFS4ERR_DELAY); | |
910ac68a TM |
464 | /* Return NFS4ERR_BADSESSION if we're draining the session |
465 | * in order to reset it. | |
466 | */ | |
467 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
468 | status = htonl(NFS4ERR_BADSESSION); | |
42acd021 AA |
469 | goto out; |
470 | } | |
471 | ||
b2f28bd7 | 472 | status = validate_seqid(&clp->cl_session->bc_slot_table, args); |
55a67399 | 473 | spin_unlock(&tbl->slot_tbl_lock); |
68f3f901 | 474 | if (status) |
c36fca52 | 475 | goto out; |
68f3f901 | 476 | |
55a67399 TM |
477 | cps->slotid = args->csa_slotid; |
478 | ||
72ce2b3c MS |
479 | /* |
480 | * Check for pending referring calls. If a match is found, a | |
481 | * related callback was received before the response to the original | |
482 | * call. | |
483 | */ | |
484 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
485 | status = htonl(NFS4ERR_DELAY); | |
c36fca52 | 486 | goto out; |
72ce2b3c MS |
487 | } |
488 | ||
d49433e1 BH |
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 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
494 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
495 | ||
68f3f901 | 496 | out: |
2c4cdf8f | 497 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
498 | for (i = 0; i < args->csa_nrclists; i++) |
499 | kfree(args->csa_rclists[i].rcl_refcalls); | |
500 | kfree(args->csa_rclists); | |
501 | ||
c36fca52 AA |
502 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
503 | cps->drc_status = status; | |
504 | status = 0; | |
505 | } else | |
4911096f | 506 | res->csr_status = status; |
c36fca52 | 507 | |
4911096f AA |
508 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
509 | ntohl(status), ntohl(res->csr_status)); | |
510 | return status; | |
d49433e1 BH |
511 | } |
512 | ||
36840370 AB |
513 | static bool |
514 | validate_bitmap_values(unsigned long mask) | |
515 | { | |
516 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
517 | } | |
518 | ||
c36fca52 AA |
519 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
520 | struct cb_process_state *cps) | |
31f09607 | 521 | { |
9733f0d9 | 522 | __be32 status; |
31f09607 AB |
523 | fmode_t flags = 0; |
524 | ||
36840370 | 525 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 526 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
527 | goto out; |
528 | ||
2446ab60 | 529 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
c36fca52 | 530 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 531 | |
36840370 AB |
532 | status = cpu_to_be32(NFS4ERR_INVAL); |
533 | if (!validate_bitmap_values(args->craa_type_mask)) | |
534 | goto out; | |
535 | ||
536 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
537 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
538 | &args->craa_type_mask)) | |
539 | flags = FMODE_READ; | |
540 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
541 | &args->craa_type_mask)) | |
542 | flags |= FMODE_WRITE; | |
36840370 AB |
543 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
544 | &args->craa_type_mask)) | |
545 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 546 | if (flags) |
c36fca52 | 547 | nfs_expire_all_delegation_types(cps->clp, flags); |
31f09607 AB |
548 | out: |
549 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
550 | return status; | |
551 | } | |
b9efa1b2 AA |
552 | |
553 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
554 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
555 | struct cb_process_state *cps) | |
b9efa1b2 | 556 | { |
b9efa1b2 | 557 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 558 | __be32 status; |
b9efa1b2 AA |
559 | |
560 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 561 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
562 | goto out; |
563 | ||
d5fb4ce3 | 564 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %d\n", |
c36fca52 | 565 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
d5fb4ce3 | 566 | args->crsa_target_highest_slotid); |
b9efa1b2 | 567 | |
c36fca52 | 568 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 | 569 | |
bae0ac0e | 570 | status = htonl(NFS4_OK); |
b9efa1b2 | 571 | |
d5fb4ce3 | 572 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
b9efa1b2 AA |
573 | out: |
574 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
575 | return status; | |
576 | } | |
d49433e1 | 577 | #endif /* CONFIG_NFS_V4_1 */ |