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" |
1da177e4 | 18 | |
1d98fe67 | 19 | #ifdef NFS_DEBUG |
1da177e4 | 20 | #define NFSDBG_FACILITY NFSDBG_CALLBACK |
1d98fe67 | 21 | #endif |
c36fca52 AA |
22 | |
23 | __be32 nfs4_callback_getattr(struct cb_getattrargs *args, | |
24 | struct cb_getattrres *res, | |
25 | struct cb_process_state *cps) | |
1da177e4 | 26 | { |
1da177e4 LT |
27 | struct nfs_delegation *delegation; |
28 | struct nfs_inode *nfsi; | |
29 | struct inode *inode; | |
1d98fe67 | 30 | |
c36fca52 AA |
31 | res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
32 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
33 | goto out; | |
34 | ||
1da177e4 LT |
35 | res->bitmap[0] = res->bitmap[1] = 0; |
36 | res->status = htonl(NFS4ERR_BADHANDLE); | |
1d98fe67 | 37 | |
2446ab60 | 38 | dprintk_rcu("NFS: GETATTR callback request from %s\n", |
c36fca52 | 39 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
1d98fe67 | 40 | |
c36fca52 | 41 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); |
1da177e4 | 42 | if (inode == NULL) |
c36fca52 | 43 | goto out; |
1da177e4 | 44 | nfsi = NFS_I(inode); |
761fe93c TM |
45 | rcu_read_lock(); |
46 | delegation = rcu_dereference(nfsi->delegation); | |
1da177e4 LT |
47 | if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) |
48 | goto out_iput; | |
49 | res->size = i_size_read(inode); | |
beb2a5ec TM |
50 | res->change_attr = delegation->change_attr; |
51 | if (nfsi->npages != 0) | |
52 | res->change_attr++; | |
1da177e4 LT |
53 | res->ctime = inode->i_ctime; |
54 | res->mtime = inode->i_mtime; | |
55 | res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & | |
56 | args->bitmap[0]; | |
57 | res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & | |
58 | args->bitmap[1]; | |
59 | res->status = 0; | |
60 | out_iput: | |
761fe93c | 61 | rcu_read_unlock(); |
1da177e4 | 62 | iput(inode); |
1da177e4 | 63 | out: |
3110ff80 | 64 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); |
1da177e4 LT |
65 | return res->status; |
66 | } | |
67 | ||
c36fca52 AA |
68 | __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
69 | struct cb_process_state *cps) | |
1da177e4 | 70 | { |
1da177e4 | 71 | struct inode *inode; |
e6f684f6 | 72 | __be32 res; |
1da177e4 | 73 | |
c36fca52 AA |
74 | res = htonl(NFS4ERR_OP_NOT_IN_SESSION); |
75 | if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ | |
1da177e4 | 76 | goto out; |
1d98fe67 | 77 | |
2446ab60 | 78 | dprintk_rcu("NFS: RECALL callback request from %s\n", |
c36fca52 AA |
79 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
80 | ||
81 | res = htonl(NFS4ERR_BADHANDLE); | |
82 | inode = nfs_delegation_find_inode(cps->clp, &args->fh); | |
83 | if (inode == NULL) | |
84 | goto out; | |
85 | /* Set up a helper thread to actually return the delegation */ | |
86 | switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { | |
87 | case 0: | |
88 | res = 0; | |
89 | break; | |
90 | case -ENOENT: | |
8e663f0e | 91 | res = htonl(NFS4ERR_BAD_STATEID); |
c36fca52 AA |
92 | break; |
93 | default: | |
94 | res = htonl(NFS4ERR_RESOURCE); | |
95 | } | |
96 | iput(inode); | |
1da177e4 | 97 | out: |
3110ff80 | 98 | dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); |
1da177e4 LT |
99 | return res; |
100 | } | |
d49433e1 BH |
101 | |
102 | #if defined(CONFIG_NFS_V4_1) | |
103 | ||
d36b7cf7 BH |
104 | /* |
105 | * Lookup a layout by filehandle. | |
106 | * | |
107 | * Note: gets a refcount on the layout hdr and on its respective inode. | |
108 | * Caller must put the layout hdr and the inode. | |
109 | * | |
110 | * TODO: keep track of all layouts (and delegations) in a hash table | |
111 | * hashed by filehandle. | |
112 | */ | |
113 | static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh) | |
43f1b3da | 114 | { |
6382a441 | 115 | struct nfs_server *server; |
43f1b3da | 116 | struct inode *ino; |
d36b7cf7 | 117 | struct pnfs_layout_hdr *lo; |
43f1b3da | 118 | |
6382a441 WAA |
119 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
120 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
d36b7cf7 | 121 | if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh)) |
6382a441 WAA |
122 | continue; |
123 | ino = igrab(lo->plh_inode); | |
124 | if (!ino) | |
125 | continue; | |
9c626381 TM |
126 | spin_lock(&ino->i_lock); |
127 | /* Is this layout in the process of being freed? */ | |
128 | if (NFS_I(ino)->layout != lo) { | |
129 | spin_unlock(&ino->i_lock); | |
130 | iput(ino); | |
131 | continue; | |
132 | } | |
70c3bd2b | 133 | pnfs_get_layout_hdr(lo); |
9c626381 | 134 | spin_unlock(&ino->i_lock); |
d36b7cf7 | 135 | return lo; |
6382a441 | 136 | } |
43f1b3da | 137 | } |
d36b7cf7 BH |
138 | |
139 | return NULL; | |
140 | } | |
141 | ||
142 | static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh) | |
143 | { | |
144 | struct pnfs_layout_hdr *lo; | |
145 | ||
146 | spin_lock(&clp->cl_lock); | |
147 | rcu_read_lock(); | |
148 | lo = get_layout_by_fh_locked(clp, fh); | |
6382a441 | 149 | rcu_read_unlock(); |
43f1b3da | 150 | spin_unlock(&clp->cl_lock); |
6382a441 | 151 | |
d36b7cf7 BH |
152 | return lo; |
153 | } | |
154 | ||
155 | static u32 initiate_file_draining(struct nfs_client *clp, | |
156 | struct cb_layoutrecallargs *args) | |
157 | { | |
158 | struct inode *ino; | |
159 | struct pnfs_layout_hdr *lo; | |
160 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
161 | LIST_HEAD(free_me_list); | |
162 | ||
163 | lo = get_layout_by_fh(clp, &args->cbl_fh); | |
164 | if (!lo) | |
43f1b3da FI |
165 | return NFS4ERR_NOMATCHING_LAYOUT; |
166 | ||
d36b7cf7 | 167 | ino = lo->plh_inode; |
43f1b3da FI |
168 | spin_lock(&ino->i_lock); |
169 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
49a85061 | 170 | pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, |
778b5502 | 171 | &args->cbl_range)) |
43f1b3da FI |
172 | rv = NFS4ERR_DELAY; |
173 | else | |
174 | rv = NFS4ERR_NOMATCHING_LAYOUT; | |
175 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); | |
176 | spin_unlock(&ino->i_lock); | |
177 | pnfs_free_lseg_list(&free_me_list); | |
70c3bd2b | 178 | pnfs_put_layout_hdr(lo); |
43f1b3da FI |
179 | iput(ino); |
180 | return rv; | |
181 | } | |
182 | ||
183 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
184 | struct cb_layoutrecallargs *args) | |
185 | { | |
6382a441 | 186 | struct nfs_server *server; |
43f1b3da FI |
187 | struct pnfs_layout_hdr *lo; |
188 | struct inode *ino; | |
189 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
190 | struct pnfs_layout_hdr *tmp; | |
191 | LIST_HEAD(recall_list); | |
192 | LIST_HEAD(free_me_list); | |
193 | struct pnfs_layout_range range = { | |
194 | .iomode = IOMODE_ANY, | |
195 | .offset = 0, | |
196 | .length = NFS4_MAX_UINT64, | |
197 | }; | |
198 | ||
199 | spin_lock(&clp->cl_lock); | |
6382a441 WAA |
200 | rcu_read_lock(); |
201 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
43f1b3da | 202 | if ((args->cbl_recall_type == RETURN_FSID) && |
6382a441 WAA |
203 | memcmp(&server->fsid, &args->cbl_fsid, |
204 | sizeof(struct nfs_fsid))) | |
43f1b3da | 205 | continue; |
6382a441 WAA |
206 | |
207 | list_for_each_entry(lo, &server->layouts, plh_layouts) { | |
9c626381 TM |
208 | ino = igrab(lo->plh_inode); |
209 | if (ino) | |
210 | continue; | |
211 | spin_lock(&ino->i_lock); | |
212 | /* Is this layout in the process of being freed? */ | |
213 | if (NFS_I(ino)->layout != lo) { | |
214 | spin_unlock(&ino->i_lock); | |
215 | iput(ino); | |
6382a441 | 216 | continue; |
9c626381 | 217 | } |
70c3bd2b | 218 | pnfs_get_layout_hdr(lo); |
9c626381 | 219 | spin_unlock(&ino->i_lock); |
6382a441 WAA |
220 | list_add(&lo->plh_bulk_recall, &recall_list); |
221 | } | |
43f1b3da | 222 | } |
6382a441 | 223 | rcu_read_unlock(); |
43f1b3da | 224 | spin_unlock(&clp->cl_lock); |
6382a441 | 225 | |
43f1b3da FI |
226 | list_for_each_entry_safe(lo, tmp, |
227 | &recall_list, plh_bulk_recall) { | |
228 | ino = lo->plh_inode; | |
229 | spin_lock(&ino->i_lock); | |
230 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
49a85061 | 231 | if (pnfs_mark_matching_lsegs_invalid(lo, &free_me_list, &range)) |
43f1b3da FI |
232 | rv = NFS4ERR_DELAY; |
233 | list_del_init(&lo->plh_bulk_recall); | |
234 | spin_unlock(&ino->i_lock); | |
f49f9baa | 235 | pnfs_free_lseg_list(&free_me_list); |
70c3bd2b | 236 | pnfs_put_layout_hdr(lo); |
43f1b3da FI |
237 | iput(ino); |
238 | } | |
43f1b3da FI |
239 | return rv; |
240 | } | |
241 | ||
242 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
243 | struct cb_layoutrecallargs *args) | |
244 | { | |
0cb3284b | 245 | u32 res; |
43f1b3da FI |
246 | |
247 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
43f1b3da FI |
248 | if (args->cbl_recall_type == RETURN_FILE) |
249 | res = initiate_file_draining(clp, args); | |
250 | else | |
251 | res = initiate_bulk_draining(clp, args); | |
43f1b3da FI |
252 | dprintk("%s returning %i\n", __func__, res); |
253 | return res; | |
254 | ||
255 | } | |
256 | ||
f2a62561 FI |
257 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
258 | void *dummy, struct cb_process_state *cps) | |
259 | { | |
43f1b3da FI |
260 | u32 res; |
261 | ||
262 | dprintk("%s: -->\n", __func__); | |
263 | ||
264 | if (cps->clp) | |
265 | res = do_callback_layoutrecall(cps->clp, args); | |
266 | else | |
267 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
268 | ||
269 | dprintk("%s: exit with status = %d\n", __func__, res); | |
270 | return cpu_to_be32(res); | |
f2a62561 FI |
271 | } |
272 | ||
36840370 AB |
273 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
274 | { | |
275 | struct cb_layoutrecallargs args; | |
276 | ||
277 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
278 | memset(&args, 0, sizeof(args)); | |
279 | args.cbl_recall_type = RETURN_ALL; | |
280 | /* FIXME we ignore errors, what should we do? */ | |
281 | do_callback_layoutrecall(clp, &args); | |
282 | } | |
283 | ||
1be5683b ME |
284 | __be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args, |
285 | void *dummy, struct cb_process_state *cps) | |
286 | { | |
287 | int i; | |
288 | __be32 res = 0; | |
289 | struct nfs_client *clp = cps->clp; | |
290 | struct nfs_server *server = NULL; | |
291 | ||
292 | dprintk("%s: -->\n", __func__); | |
293 | ||
294 | if (!clp) { | |
295 | res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); | |
296 | goto out; | |
297 | } | |
298 | ||
299 | for (i = 0; i < args->ndevs; i++) { | |
300 | struct cb_devicenotifyitem *dev = &args->devs[i]; | |
301 | ||
302 | if (!server || | |
303 | server->pnfs_curr_ld->id != dev->cbd_layout_type) { | |
304 | rcu_read_lock(); | |
305 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
306 | if (server->pnfs_curr_ld && | |
307 | server->pnfs_curr_ld->id == dev->cbd_layout_type) { | |
308 | rcu_read_unlock(); | |
309 | goto found; | |
310 | } | |
311 | rcu_read_unlock(); | |
312 | dprintk("%s: layout type %u not found\n", | |
313 | __func__, dev->cbd_layout_type); | |
314 | continue; | |
315 | } | |
316 | ||
317 | found: | |
318 | if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) | |
319 | dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, " | |
320 | "deleting instead\n", __func__); | |
35c8bb54 | 321 | nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id); |
1be5683b ME |
322 | } |
323 | ||
324 | out: | |
325 | kfree(args->devs); | |
326 | dprintk("%s: exit with status = %u\n", | |
327 | __func__, be32_to_cpu(res)); | |
328 | return res; | |
329 | } | |
330 | ||
68f3f901 RL |
331 | /* |
332 | * Validate the sequenceID sent by the server. | |
333 | * Return success if the sequenceID is one more than what we last saw on | |
334 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
335 | * | |
4911096f AA |
336 | * We don't yet implement a duplicate request cache, instead we set the |
337 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
338 | * since we only currently implement idempotent callbacks anyway. |
339 | * | |
340 | * We have a single slot backchannel at this time, so we don't bother | |
341 | * checking the used_slots bit array on the table. The lower layer guarantees | |
342 | * a single outstanding callback request at a time. | |
343 | */ | |
9733f0d9 | 344 | static __be32 |
b2f28bd7 | 345 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
346 | { |
347 | struct nfs4_slot *slot; | |
348 | ||
349 | dprintk("%s enter. slotid %d seqid %d\n", | |
b2f28bd7 | 350 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 351 | |
61f2e510 | 352 | if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
353 | return htonl(NFS4ERR_BADSLOT); |
354 | ||
b2f28bd7 | 355 | slot = tbl->slots + args->csa_slotid; |
68f3f901 RL |
356 | dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); |
357 | ||
358 | /* Normal */ | |
b2f28bd7 | 359 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { |
68f3f901 | 360 | slot->seq_nr++; |
55a67399 | 361 | goto out_ok; |
68f3f901 RL |
362 | } |
363 | ||
364 | /* Replay */ | |
b2f28bd7 | 365 | if (args->csa_sequenceid == slot->seq_nr) { |
4911096f | 366 | dprintk("%s seqid %d is a replay\n", |
b2f28bd7 | 367 | __func__, args->csa_sequenceid); |
4911096f AA |
368 | /* Signal process_op to set this error on next op */ |
369 | if (args->csa_cachethis == 0) | |
370 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
371 | ||
372 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
373 | else if (args->csa_cachethis == 1) | |
374 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
375 | } |
376 | ||
377 | /* Wraparound */ | |
b2f28bd7 | 378 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 | 379 | slot->seq_nr = 1; |
55a67399 | 380 | goto out_ok; |
68f3f901 RL |
381 | } |
382 | ||
383 | /* Misordered request */ | |
384 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
55a67399 TM |
385 | out_ok: |
386 | tbl->highest_used_slotid = args->csa_slotid; | |
387 | return htonl(NFS4_OK); | |
68f3f901 RL |
388 | } |
389 | ||
a7989c3e MS |
390 | /* |
391 | * For each referring call triple, check the session's slot table for | |
392 | * a match. If the slot is in use and the sequence numbers match, the | |
393 | * client is still waiting for a response to the original request. | |
394 | */ | |
395 | static bool referring_call_exists(struct nfs_client *clp, | |
396 | uint32_t nrclists, | |
397 | struct referring_call_list *rclists) | |
398 | { | |
399 | bool status = 0; | |
400 | int i, j; | |
401 | struct nfs4_session *session; | |
402 | struct nfs4_slot_table *tbl; | |
403 | struct referring_call_list *rclist; | |
404 | struct referring_call *ref; | |
405 | ||
406 | /* | |
407 | * XXX When client trunking is implemented, this becomes | |
408 | * a session lookup from within the loop | |
409 | */ | |
410 | session = clp->cl_session; | |
411 | tbl = &session->fc_slot_table; | |
412 | ||
413 | for (i = 0; i < nrclists; i++) { | |
414 | rclist = &rclists[i]; | |
415 | if (memcmp(session->sess_id.data, | |
416 | rclist->rcl_sessionid.data, | |
417 | NFS4_MAX_SESSIONID_LEN) != 0) | |
418 | continue; | |
419 | ||
420 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
421 | ref = &rclist->rcl_refcalls[j]; | |
422 | ||
423 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
424 | "slotid %u\n", __func__, | |
425 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
426 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
427 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
428 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
429 | ref->rc_sequenceid, ref->rc_slotid); | |
430 | ||
431 | spin_lock(&tbl->slot_tbl_lock); | |
432 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
433 | tbl->slots[ref->rc_slotid].seq_nr == | |
434 | ref->rc_sequenceid); | |
435 | spin_unlock(&tbl->slot_tbl_lock); | |
436 | if (status) | |
437 | goto out; | |
438 | } | |
439 | } | |
440 | ||
441 | out: | |
442 | return status; | |
443 | } | |
444 | ||
9733f0d9 | 445 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
446 | struct cb_sequenceres *res, |
447 | struct cb_process_state *cps) | |
d49433e1 | 448 | { |
55a67399 | 449 | struct nfs4_slot_table *tbl; |
68f3f901 | 450 | struct nfs_client *clp; |
9733f0d9 | 451 | int i; |
778be232 | 452 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 453 | |
c7add9a9 | 454 | clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid); |
68f3f901 RL |
455 | if (clp == NULL) |
456 | goto out; | |
457 | ||
55a67399 TM |
458 | tbl = &clp->cl_session->bc_slot_table; |
459 | ||
460 | spin_lock(&tbl->slot_tbl_lock); | |
42acd021 AA |
461 | /* state manager is resetting the session */ |
462 | if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { | |
55a67399 TM |
463 | spin_unlock(&tbl->slot_tbl_lock); |
464 | status = htonl(NFS4ERR_DELAY); | |
910ac68a TM |
465 | /* Return NFS4ERR_BADSESSION if we're draining the session |
466 | * in order to reset it. | |
467 | */ | |
468 | if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) | |
469 | status = htonl(NFS4ERR_BADSESSION); | |
42acd021 AA |
470 | goto out; |
471 | } | |
472 | ||
b2f28bd7 | 473 | status = validate_seqid(&clp->cl_session->bc_slot_table, args); |
55a67399 | 474 | spin_unlock(&tbl->slot_tbl_lock); |
68f3f901 | 475 | if (status) |
c36fca52 | 476 | goto out; |
68f3f901 | 477 | |
55a67399 TM |
478 | cps->slotid = args->csa_slotid; |
479 | ||
72ce2b3c MS |
480 | /* |
481 | * Check for pending referring calls. If a match is found, a | |
482 | * related callback was received before the response to the original | |
483 | * call. | |
484 | */ | |
485 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
486 | status = htonl(NFS4ERR_DELAY); | |
c36fca52 | 487 | goto out; |
72ce2b3c MS |
488 | } |
489 | ||
d49433e1 BH |
490 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
491 | sizeof(res->csr_sessionid)); | |
492 | res->csr_sequenceid = args->csa_sequenceid; | |
493 | res->csr_slotid = args->csa_slotid; | |
494 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
495 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
496 | ||
68f3f901 | 497 | out: |
2c4cdf8f | 498 | cps->clp = clp; /* put in nfs4_callback_compound */ |
72ce2b3c MS |
499 | for (i = 0; i < args->csa_nrclists; i++) |
500 | kfree(args->csa_rclists[i].rcl_refcalls); | |
501 | kfree(args->csa_rclists); | |
502 | ||
c36fca52 AA |
503 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
504 | cps->drc_status = status; | |
505 | status = 0; | |
506 | } else | |
4911096f | 507 | res->csr_status = status; |
c36fca52 | 508 | |
4911096f AA |
509 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
510 | ntohl(status), ntohl(res->csr_status)); | |
511 | return status; | |
d49433e1 BH |
512 | } |
513 | ||
36840370 AB |
514 | static bool |
515 | validate_bitmap_values(unsigned long mask) | |
516 | { | |
517 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
518 | } | |
519 | ||
c36fca52 AA |
520 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
521 | struct cb_process_state *cps) | |
31f09607 | 522 | { |
9733f0d9 | 523 | __be32 status; |
31f09607 AB |
524 | fmode_t flags = 0; |
525 | ||
36840370 | 526 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 527 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
528 | goto out; |
529 | ||
2446ab60 | 530 | dprintk_rcu("NFS: RECALL_ANY callback request from %s\n", |
c36fca52 | 531 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 532 | |
36840370 AB |
533 | status = cpu_to_be32(NFS4ERR_INVAL); |
534 | if (!validate_bitmap_values(args->craa_type_mask)) | |
535 | goto out; | |
536 | ||
537 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
538 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
539 | &args->craa_type_mask)) | |
540 | flags = FMODE_READ; | |
541 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
542 | &args->craa_type_mask)) | |
543 | flags |= FMODE_WRITE; | |
36840370 AB |
544 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
545 | &args->craa_type_mask)) | |
546 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 547 | if (flags) |
c36fca52 | 548 | nfs_expire_all_delegation_types(cps->clp, flags); |
31f09607 AB |
549 | out: |
550 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
551 | return status; | |
552 | } | |
b9efa1b2 AA |
553 | |
554 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
555 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
556 | struct cb_process_state *cps) | |
b9efa1b2 | 557 | { |
b9efa1b2 | 558 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 559 | __be32 status; |
b9efa1b2 AA |
560 | |
561 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 562 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
563 | goto out; |
564 | ||
d5fb4ce3 | 565 | dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %d\n", |
c36fca52 | 566 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
d5fb4ce3 | 567 | args->crsa_target_highest_slotid); |
b9efa1b2 | 568 | |
c36fca52 | 569 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 | 570 | |
bae0ac0e | 571 | status = htonl(NFS4_OK); |
b9efa1b2 | 572 | |
d5fb4ce3 | 573 | nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid); |
ac074835 | 574 | nfs41_server_notify_target_slotid_update(cps->clp); |
b9efa1b2 AA |
575 | out: |
576 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
577 | return status; | |
578 | } | |
d49433e1 | 579 | #endif /* CONFIG_NFS_V4_1 */ |