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 | 19 | |
1d98fe67 | 20 | #ifdef NFS_DEBUG |
1da177e4 | 21 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
1d98fe67 | 22 | #endif |
c36fca52 AA |
23 | |
24 | __be32 nfs4_callback_getattr(struct cb_getattrargs *args, | |
25 | struct cb_getattrres *res, | |
26 | struct cb_process_state *cps) | |
1da177e4 | 27 | { |
1da177e4 LT |
28 | struct nfs_delegation *delegation; |
29 | struct nfs_inode *nfsi; | |
30 | struct inode *inode; | |
1d98fe67 | 31 | |
c36fca52 AA |
32 | res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
33 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
34 | goto out; | |
35 | ||
1da177e4 LT |
36 | res->bitmap[0] = res->bitmap[1] = 0; |
37 | res->status = htonl(NFS4ERR_BADHANDLE); | |
1d98fe67 | 38 | |
2446ab60 | 39 | dprintk_rcu("NFS: GETATTR callback request from %s\n", |
c36fca52 | 40 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
1d98fe67 | 41 | |
c36fca52 | 42 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
7cd14861 | 43 | if (inode == NULL) { |
249b2eef | 44 | trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL, |
7cd14861 | 45 | -ntohl(res->status)); |
c36fca52 | 46 | goto out; |
7cd14861 | 47 | } |
1da177e4 | 48 | nfsi = NFS_I(inode); |
761fe93c TM |
49 | rcu_read_lock(); |
50 | delegation = rcu_dereference(nfsi->delegation); | |
1da177e4 LT |
51 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
52 | goto out_iput; | |
53 | res->size = i_size_read(inode); | |
beb2a5ec | 54 | res->change_attr = delegation->change_attr; |
cb1410c7 | 55 | if (nfsi->nrequests != 0) |
beb2a5ec | 56 | res->change_attr++; |
1da177e4 LT |
57 | res->ctime = inode->i_ctime; |
58 | res->mtime = inode->i_mtime; | |
59 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & | |
60 | args->bitmap[0]; | |
61 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & | |
62 | args->bitmap[1]; | |
63 | res->status = 0; | |
64 | out_iput: | |
761fe93c | 65 | rcu_read_unlock(); |
7cd14861 | 66 | trace_nfs4_cb_getattr(cps->clp, &args->fh, inode, -ntohl(res->status)); |
1da177e4 | 67 | iput(inode); |
1da177e4 | 68 | out: |
3110ff80 | 69 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
1da177e4 LT |
70 | return res->status; |
71 | } | |
72 | ||
c36fca52 AA |
73 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
74 | struct cb_process_state *cps) | |
1da177e4 | 75 | { |
1da177e4 | 76 | struct inode *inode; |
e6f684f6 | 77 | __be32 res; |
1da177e4 | 78 | |
c36fca52 AA |
79 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
80 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
1da177e4 | 81 | goto out; |
1d98fe67 | 82 | |
2446ab60 | 83 | dprintk_rcu("NFS: RECALL callback request from %s\n", |
c36fca52 AA |
84 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
85 | ||
86 | res = htonl(NFS4ERR_BADHANDLE); | |
87 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); | |
88 | if (inode == NULL) | |
89 | goto out; | |
90 | /* Set up a helper thread to actually return the delegation */ | |
91 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
92 | case 0: | |
93 | res = 0; | |
94 | break; | |
95 | case -ENOENT: | |
8e663f0e | 96 | res = htonl(NFS4ERR_BAD_STATEID); |
c36fca52 AA |
97 | break; |
98 | default: | |
99 | res = htonl(NFS4ERR_RESOURCE); | |
100 | } | |
ca8acf8d | 101 | trace_nfs4_recall_delegation(inode, -ntohl(res)); |
c36fca52 | 102 | iput(inode); |
1da177e4 | 103 | out: |
3110ff80 | 104 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
1da177e4 LT |
105 | return res; |
106 | } | |
d49433e1 BH |
107 | |
108 | #if defined(CONFIG_NFS_V4_1) | |
109 | ||
d36b7cf7 BH |
110 | /* |
111 | * Lookup a layout by filehandle. | |
112 | * | |
113 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
114 | * Caller must put the layout hdr and the inode. | |
115 | * | |
116 | * TODO: keep track of all layouts (and delegations) in a hash table | |
117 | * hashed by filehandle. | |
118 | */ | |
27999f25 TM |
119 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, |
120 | struct nfs_fh *fh, nfs4_stateid *stateid) | |
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) { | |
27999f25 TM |
128 | if (!nfs4_stateid_match_other(&lo->plh_stateid, stateid)) |
129 | continue; | |
d36b7cf7 | 130 | if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) |
6382a441 WAA |
131 | continue; |
132 | ino = igrab(lo->plh_inode); | |
133 | if (!ino) | |
9a7fe9e8 | 134 | break; |
9c626381 TM |
135 | spin_lock(&ino->i_lock); |
136 | /* Is this layout in the process of being freed? */ | |
137 | if (NFS_I(ino)->layout != lo) { | |
138 | spin_unlock(&ino->i_lock); | |
139 | iput(ino); | |
9a7fe9e8 | 140 | break; |
9c626381 | 141 | } |
70c3bd2b | 142 | pnfs_get_layout_hdr(lo); |
9c626381 | 143 | spin_unlock(&ino->i_lock); |
d36b7cf7 | 144 | return lo; |
6382a441 | 145 | } |
43f1b3da | 146 | } |
d36b7cf7 BH |
147 | |
148 | return NULL; | |
149 | } | |
150 | ||
27999f25 TM |
151 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, |
152 | struct nfs_fh *fh, nfs4_stateid *stateid) | |
d36b7cf7 BH |
153 | { |
154 | struct pnfs_layout_hdr *lo; | |
155 | ||
156 | spin_lock(&clp->cl_lock); | |
157 | rcu_read_lock(); | |
27999f25 | 158 | lo = get_layout_by_fh_locked(clp, fh, stateid); |
6382a441 | 159 | rcu_read_unlock(); |
43f1b3da | 160 | spin_unlock(&clp->cl_lock); |
6382a441 | 161 | |
d36b7cf7 BH |
162 | return lo; |
163 | } | |
164 | ||
165 | static u32 initiate_file_draining(struct nfs_client *clp, | |
166 | struct cb_layoutrecallargs *args) | |
167 | { | |
168 | struct inode *ino; | |
169 | struct pnfs_layout_hdr *lo; | |
170 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
171 | LIST_HEAD(free_me_list); | |
172 | ||
27999f25 | 173 | lo = get_layout_by_fh(clp, &args->cbl_fh, &args->cbl_stateid); |
d36b7cf7 | 174 | if (!lo) |
27999f25 | 175 | goto out; |
43f1b3da | 176 | |
d36b7cf7 | 177 | ino = lo->plh_inode; |
7c5d1875 CH |
178 | |
179 | spin_lock(&ino->i_lock); | |
180 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); | |
181 | spin_unlock(&ino->i_lock); | |
182 | ||
183 | pnfs_layoutcommit_inode(ino, false); | |
184 | ||
43f1b3da FI |
185 | spin_lock(&ino->i_lock); |
186 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
49a85061 | 187 | pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, |
c88953d8 | 188 | &args->cbl_range)) { |
43f1b3da | 189 | rv = NFS4ERR_DELAY; |
c88953d8 CH |
190 | goto unlock; |
191 | } | |
192 | ||
193 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { | |
194 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, | |
195 | &args->cbl_range); | |
196 | } | |
197 | unlock: | |
43f1b3da FI |
198 | spin_unlock(&ino->i_lock); |
199 | pnfs_free_lseg_list(&free_me_list); | |
70c3bd2b | 200 | pnfs_put_layout_hdr(lo); |
249b2eef | 201 | trace_nfs4_cb_layoutrecall_inode(clp, &args->cbl_fh, ino, -rv); |
43f1b3da | 202 | iput(ino); |
27999f25 | 203 | out: |
43f1b3da FI |
204 | return rv; |
205 | } | |
206 | ||
207 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
208 | struct cb_layoutrecallargs *args) | |
209 | { | |
fd9a8d71 | 210 | int stat; |
6382a441 | 211 | |
fd9a8d71 TM |
212 | if (args->cbl_recall_type == RETURN_FSID) |
213 | stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true); | |
214 | else | |
215 | stat = pnfs_destroy_layouts_byclid(clp, true); | |
216 | if (stat != 0) | |
217 | return NFS4ERR_DELAY; | |
218 | return NFS4ERR_NOMATCHING_LAYOUT; | |
43f1b3da FI |
219 | } |
220 | ||
221 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
222 | struct cb_layoutrecallargs *args) | |
223 | { | |
0cb3284b | 224 | u32 res; |
43f1b3da FI |
225 | |
226 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
43f1b3da FI |
227 | if (args->cbl_recall_type == RETURN_FILE) |
228 | res = initiate_file_draining(clp, args); | |
229 | else | |
230 | res = initiate_bulk_draining(clp, args); | |
43f1b3da FI |
231 | dprintk("%s returning %i\n", __func__, res); |
232 | return res; | |
233 | ||
234 | } | |
235 | ||
f2a62561 FI |
236 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
237 | void *dummy, struct cb_process_state *cps) | |
238 | { | |
43f1b3da FI |
239 | u32 res; |
240 | ||
241 | dprintk("%s: -->\n", __func__); | |
242 | ||
243 | if (cps->clp) | |
244 | res = do_callback_layoutrecall(cps->clp, args); | |
245 | else | |
246 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
247 | ||
248 | dprintk("%s: exit with status = %d\n", __func__, res); | |
249 | return cpu_to_be32(res); | |
f2a62561 FI |
250 | } |
251 | ||
36840370 AB |
252 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
253 | { | |
254 | struct cb_layoutrecallargs args; | |
255 | ||
256 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
257 | memset(&args, 0, sizeof(args)); | |
258 | args.cbl_recall_type = RETURN_ALL; | |
259 | /* FIXME we ignore errors, what should we do? */ | |
260 | do_callback_layoutrecall(clp, &args); | |
261 | } | |
262 | ||
1be5683b ME |
263 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
264 | void *dummy, struct cb_process_state *cps) | |
265 | { | |
266 | int i; | |
267 | __be32 res = 0; | |
268 | struct nfs_client *clp = cps->clp; | |
269 | struct nfs_server *server = NULL; | |
270 | ||
271 | dprintk("%s: -->\n", __func__); | |
272 | ||
273 | if (!clp) { | |
274 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
275 | goto out; | |
276 | } | |
277 | ||
278 | for (i = 0; i < args->ndevs; i++) { | |
279 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
280 | ||
281 | if (!server || | |
282 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
283 | rcu_read_lock(); | |
284 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
285 | if (server->pnfs_curr_ld && | |
286 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
287 | rcu_read_unlock(); | |
288 | goto found; | |
289 | } | |
290 | rcu_read_unlock(); | |
291 | dprintk("%s: layout type %u not found\n", | |
292 | __func__, dev->cbd_layout_type); | |
293 | continue; | |
294 | } | |
295 | ||
296 | found: | |
35c8bb54 | 297 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
298 | } |
299 | ||
300 | out: | |
301 | kfree(args->devs); | |
302 | dprintk("%s: exit with status = %u\n", | |
303 | __func__, be32_to_cpu(res)); | |
304 | return res; | |
305 | } | |
306 | ||
68f3f901 RL |
307 | /* |
308 | * Validate the sequenceID sent by the server. | |
309 | * Return success if the sequenceID is one more than what we last saw on | |
310 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
311 | * | |
4911096f AA |
312 | * We don't yet implement a duplicate request cache, instead we set the |
313 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
314 | * since we only currently implement idempotent callbacks anyway. |
315 | * | |
316 | * We have a single slot backchannel at this time, so we don't bother | |
317 | * checking the used_slots bit array on the table. The lower layer guarantees | |
318 | * a single outstanding callback request at a time. | |
319 | */ | |
9733f0d9 | 320 | static __be32 |
b2f28bd7 | 321 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
322 | { |
323 | struct nfs4_slot *slot; | |
324 | ||
e8d92382 | 325 | dprintk("%s enter. slotid %u seqid %u\n", |
b2f28bd7 | 326 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 327 | |
61f2e510 | 328 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
329 | return htonl(NFS4ERR_BADSLOT); |
330 | ||
b2f28bd7 | 331 | slot = tbl->slots + args->csa_slotid; |
e8d92382 | 332 | dprintk("%s slot table seqid: %u\n", __func__, slot->seq_nr); |
68f3f901 RL |
333 | |
334 | /* Normal */ | |
e937ee71 | 335 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) |
55a67399 | 336 | goto out_ok; |
68f3f901 RL |
337 | |
338 | /* Replay */ | |
b2f28bd7 | 339 | if (args->csa_sequenceid == slot->seq_nr) { |
e8d92382 | 340 | dprintk("%s seqid %u is a replay\n", |
b2f28bd7 | 341 | __func__, args->csa_sequenceid); |
4911096f AA |
342 | /* Signal process_op to set this error on next op */ |
343 | if (args->csa_cachethis == 0) | |
344 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
345 | ||
346 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
347 | else if (args->csa_cachethis == 1) | |
348 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
349 | } |
350 | ||
351 | /* Wraparound */ | |
b2f28bd7 | 352 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 | 353 | slot->seq_nr = 1; |
55a67399 | 354 | goto out_ok; |
68f3f901 RL |
355 | } |
356 | ||
357 | /* Misordered request */ | |
358 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
55a67399 TM |
359 | out_ok: |
360 | tbl->highest_used_slotid = args->csa_slotid; | |
361 | return htonl(NFS4_OK); | |
68f3f901 RL |
362 | } |
363 | ||
a7989c3e MS |
364 | /* |
365 | * For each referring call triple, check the session's slot table for | |
366 | * a match. If the slot is in use and the sequence numbers match, the | |
367 | * client is still waiting for a response to the original request. | |
368 | */ | |
369 | static bool referring_call_exists(struct nfs_client *clp, | |
370 | uint32_t nrclists, | |
371 | struct referring_call_list *rclists) | |
372 | { | |
373 | bool status = 0; | |
374 | int i, j; | |
375 | struct nfs4_session *session; | |
376 | struct nfs4_slot_table *tbl; | |
377 | struct referring_call_list *rclist; | |
378 | struct referring_call *ref; | |
379 | ||
380 | /* | |
381 | * XXX When client trunking is implemented, this becomes | |
382 | * a session lookup from within the loop | |
383 | */ | |
384 | session = clp->cl_session; | |
385 | tbl = &session->fc_slot_table; | |
386 | ||
387 | for (i = 0; i < nrclists; i++) { | |
388 | rclist = &rclists[i]; | |
389 | if (memcmp(session->sess_id.data, | |
390 | rclist->rcl_sessionid.data, | |
391 | NFS4_MAX_SESSIONID_LEN) != 0) | |
392 | continue; | |
393 | ||
394 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
395 | ref = &rclist->rcl_refcalls[j]; | |
396 | ||
397 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
398 | "slotid %u\n", __func__, | |
399 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
400 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
401 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
402 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
403 | ref->rc_sequenceid, ref->rc_slotid); | |
404 | ||
405 | spin_lock(&tbl->slot_tbl_lock); | |
406 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
407 | tbl->slots[ref->rc_slotid].seq_nr == | |
408 | ref->rc_sequenceid); | |
409 | spin_unlock(&tbl->slot_tbl_lock); | |
410 | if (status) | |
411 | goto out; | |
412 | } | |
413 | } | |
414 | ||
415 | out: | |
416 | return status; | |
417 | } | |
418 | ||
9733f0d9 | 419 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
420 | struct cb_sequenceres *res, |
421 | struct cb_process_state *cps) | |
d49433e1 | 422 | { |
55a67399 | 423 | struct nfs4_slot_table *tbl; |
e937ee71 | 424 | struct nfs4_slot *slot; |
68f3f901 | 425 | struct nfs_client *clp; |
9733f0d9 | 426 | int i; |
778be232 | 427 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 428 | |
459de2ed BS |
429 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, |
430 | &args->csa_sessionid, cps->minorversion); | |
68f3f901 RL |
431 | if (clp == NULL) |
432 | goto out; | |
433 | ||
b1c0df5f TM |
434 | if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
435 | goto out; | |
e937ee71 | 436 | |
55a67399 | 437 | tbl = &clp->cl_session->bc_slot_table; |
e937ee71 | 438 | slot = tbl->slots + args->csa_slotid; |
55a67399 TM |
439 | |
440 | spin_lock(&tbl->slot_tbl_lock); | |
42acd021 | 441 | /* state manager is resetting the session */ |
774d5f14 | 442 | if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
55a67399 | 443 | status = htonl(NFS4ERR_DELAY); |
910ac68a TM |
444 | /* Return NFS4ERR_BADSESSION if we're draining the session |
445 | * in order to reset it. | |
446 | */ | |
447 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
448 | status = htonl(NFS4ERR_BADSESSION); | |
4e54ab8d | 449 | goto out_unlock; |
42acd021 AA |
450 | } |
451 | ||
0579c8d2 KM |
452 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
453 | sizeof(res->csr_sessionid)); | |
454 | res->csr_sequenceid = args->csa_sequenceid; | |
455 | res->csr_slotid = args->csa_slotid; | |
456 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
457 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
458 | ||
e937ee71 | 459 | status = validate_seqid(tbl, args); |
68f3f901 | 460 | if (status) |
4e54ab8d | 461 | goto out_unlock; |
68f3f901 | 462 | |
55a67399 TM |
463 | cps->slotid = args->csa_slotid; |
464 | ||
72ce2b3c MS |
465 | /* |
466 | * Check for pending referring calls. If a match is found, a | |
467 | * related callback was received before the response to the original | |
468 | * call. | |
469 | */ | |
470 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
471 | status = htonl(NFS4ERR_DELAY); | |
4e54ab8d | 472 | goto out_unlock; |
72ce2b3c MS |
473 | } |
474 | ||
e937ee71 KM |
475 | /* |
476 | * RFC5661 20.9.3 | |
477 | * If CB_SEQUENCE returns an error, then the state of the slot | |
478 | * (sequence ID, cached reply) MUST NOT change. | |
479 | */ | |
480 | slot->seq_nr++; | |
4e54ab8d TM |
481 | out_unlock: |
482 | spin_unlock(&tbl->slot_tbl_lock); | |
e937ee71 | 483 | |
68f3f901 | 484 | out: |
2c4cdf8f | 485 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
486 | for (i = 0; i < args->csa_nrclists; i++) |
487 | kfree(args->csa_rclists[i].rcl_refcalls); | |
488 | kfree(args->csa_rclists); | |
489 | ||
c36fca52 AA |
490 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
491 | cps->drc_status = status; | |
492 | status = 0; | |
493 | } else | |
4911096f | 494 | res->csr_status = status; |
c36fca52 | 495 | |
2f92ae34 | 496 | trace_nfs4_cb_sequence(args, res, status); |
4911096f AA |
497 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
498 | ntohl(status), ntohl(res->csr_status)); | |
499 | return status; | |
d49433e1 BH |
500 | } |
501 | ||
36840370 AB |
502 | static bool |
503 | validate_bitmap_values(unsigned long mask) | |
504 | { | |
505 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
506 | } | |
507 | ||
c36fca52 AA |
508 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
509 | struct cb_process_state *cps) | |
31f09607 | 510 | { |
9733f0d9 | 511 | __be32 status; |
31f09607 AB |
512 | fmode_t flags = 0; |
513 | ||
36840370 | 514 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 515 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
516 | goto out; |
517 | ||
2446ab60 | 518 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
c36fca52 | 519 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 520 | |
36840370 AB |
521 | status = cpu_to_be32(NFS4ERR_INVAL); |
522 | if (!validate_bitmap_values(args->craa_type_mask)) | |
523 | goto out; | |
524 | ||
525 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
526 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
527 | &args->craa_type_mask)) | |
528 | flags = FMODE_READ; | |
529 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
530 | &args->craa_type_mask)) | |
531 | flags |= FMODE_WRITE; | |
36840370 AB |
532 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
533 | &args->craa_type_mask)) | |
534 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 535 | if (flags) |
826e0013 | 536 | nfs_expire_unused_delegation_types(cps->clp, flags); |
31f09607 AB |
537 | out: |
538 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
539 | return status; | |
540 | } | |
b9efa1b2 AA |
541 | |
542 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
543 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
544 | struct cb_process_state *cps) | |
b9efa1b2 | 545 | { |
b9efa1b2 | 546 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 547 | __be32 status; |
b9efa1b2 AA |
548 | |
549 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 550 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
551 | goto out; |
552 | ||
e8d92382 | 553 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n", |
c36fca52 | 554 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
d5fb4ce3 | 555 | args->crsa_target_highest_slotid); |
b9efa1b2 | 556 | |
c36fca52 | 557 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 | 558 | |
bae0ac0e | 559 | status = htonl(NFS4_OK); |
b9efa1b2 | 560 | |
d5fb4ce3 | 561 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
3f10a6af | 562 | nfs41_notify_server(cps->clp); |
b9efa1b2 AA |
563 | out: |
564 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
565 | return status; | |
566 | } | |
d49433e1 | 567 | #endif /* CONFIG_NFS_V4_1 */ |