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> |
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 | ||
43f1b3da FI |
111 | static u32 initiate_file_draining(struct nfs_client *clp, |
112 | struct cb_layoutrecallargs *args) | |
113 | { | |
114 | struct pnfs_layout_hdr *lo; | |
115 | struct inode *ino; | |
116 | bool found = false; | |
117 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
118 | LIST_HEAD(free_me_list); | |
119 | ||
120 | spin_lock(&clp->cl_lock); | |
121 | list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { | |
122 | if (nfs_compare_fh(&args->cbl_fh, | |
123 | &NFS_I(lo->plh_inode)->fh)) | |
124 | continue; | |
125 | ino = igrab(lo->plh_inode); | |
126 | if (!ino) | |
127 | continue; | |
128 | found = true; | |
129 | /* Without this, layout can be freed as soon | |
130 | * as we release cl_lock. | |
131 | */ | |
132 | get_layout_hdr(lo); | |
133 | break; | |
134 | } | |
135 | spin_unlock(&clp->cl_lock); | |
136 | if (!found) | |
137 | return NFS4ERR_NOMATCHING_LAYOUT; | |
138 | ||
139 | spin_lock(&ino->i_lock); | |
140 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || | |
141 | mark_matching_lsegs_invalid(lo, &free_me_list, | |
142 | args->cbl_range.iomode)) | |
143 | rv = NFS4ERR_DELAY; | |
144 | else | |
145 | rv = NFS4ERR_NOMATCHING_LAYOUT; | |
146 | pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); | |
147 | spin_unlock(&ino->i_lock); | |
148 | pnfs_free_lseg_list(&free_me_list); | |
149 | put_layout_hdr(lo); | |
150 | iput(ino); | |
151 | return rv; | |
152 | } | |
153 | ||
154 | static u32 initiate_bulk_draining(struct nfs_client *clp, | |
155 | struct cb_layoutrecallargs *args) | |
156 | { | |
157 | struct pnfs_layout_hdr *lo; | |
158 | struct inode *ino; | |
159 | u32 rv = NFS4ERR_NOMATCHING_LAYOUT; | |
160 | struct pnfs_layout_hdr *tmp; | |
161 | LIST_HEAD(recall_list); | |
162 | LIST_HEAD(free_me_list); | |
163 | struct pnfs_layout_range range = { | |
164 | .iomode = IOMODE_ANY, | |
165 | .offset = 0, | |
166 | .length = NFS4_MAX_UINT64, | |
167 | }; | |
168 | ||
169 | spin_lock(&clp->cl_lock); | |
170 | list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { | |
171 | if ((args->cbl_recall_type == RETURN_FSID) && | |
172 | memcmp(&NFS_SERVER(lo->plh_inode)->fsid, | |
173 | &args->cbl_fsid, sizeof(struct nfs_fsid))) | |
174 | continue; | |
175 | if (!igrab(lo->plh_inode)) | |
176 | continue; | |
177 | get_layout_hdr(lo); | |
178 | BUG_ON(!list_empty(&lo->plh_bulk_recall)); | |
179 | list_add(&lo->plh_bulk_recall, &recall_list); | |
180 | } | |
181 | spin_unlock(&clp->cl_lock); | |
182 | list_for_each_entry_safe(lo, tmp, | |
183 | &recall_list, plh_bulk_recall) { | |
184 | ino = lo->plh_inode; | |
185 | spin_lock(&ino->i_lock); | |
186 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); | |
187 | if (mark_matching_lsegs_invalid(lo, &free_me_list, range.iomode)) | |
188 | rv = NFS4ERR_DELAY; | |
189 | list_del_init(&lo->plh_bulk_recall); | |
190 | spin_unlock(&ino->i_lock); | |
191 | put_layout_hdr(lo); | |
192 | iput(ino); | |
193 | } | |
194 | pnfs_free_lseg_list(&free_me_list); | |
195 | return rv; | |
196 | } | |
197 | ||
198 | static u32 do_callback_layoutrecall(struct nfs_client *clp, | |
199 | struct cb_layoutrecallargs *args) | |
200 | { | |
201 | u32 res = NFS4ERR_DELAY; | |
202 | ||
203 | dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); | |
204 | if (test_and_set_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state)) | |
205 | goto out; | |
206 | if (args->cbl_recall_type == RETURN_FILE) | |
207 | res = initiate_file_draining(clp, args); | |
208 | else | |
209 | res = initiate_bulk_draining(clp, args); | |
210 | clear_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state); | |
211 | out: | |
212 | dprintk("%s returning %i\n", __func__, res); | |
213 | return res; | |
214 | ||
215 | } | |
216 | ||
f2a62561 FI |
217 | __be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, |
218 | void *dummy, struct cb_process_state *cps) | |
219 | { | |
43f1b3da FI |
220 | u32 res; |
221 | ||
222 | dprintk("%s: -->\n", __func__); | |
223 | ||
224 | if (cps->clp) | |
225 | res = do_callback_layoutrecall(cps->clp, args); | |
226 | else | |
227 | res = NFS4ERR_OP_NOT_IN_SESSION; | |
228 | ||
229 | dprintk("%s: exit with status = %d\n", __func__, res); | |
230 | return cpu_to_be32(res); | |
f2a62561 FI |
231 | } |
232 | ||
36840370 AB |
233 | static void pnfs_recall_all_layouts(struct nfs_client *clp) |
234 | { | |
235 | struct cb_layoutrecallargs args; | |
236 | ||
237 | /* Pretend we got a CB_LAYOUTRECALL(ALL) */ | |
238 | memset(&args, 0, sizeof(args)); | |
239 | args.cbl_recall_type = RETURN_ALL; | |
240 | /* FIXME we ignore errors, what should we do? */ | |
241 | do_callback_layoutrecall(clp, &args); | |
242 | } | |
243 | ||
2597641d AB |
244 | int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) |
245 | { | |
246 | if (delegation == NULL) | |
247 | return 0; | |
248 | ||
94499252 | 249 | if (stateid->stateid.seqid != 0) |
2597641d | 250 | return 0; |
94499252 AB |
251 | if (memcmp(&delegation->stateid.stateid.other, |
252 | &stateid->stateid.other, | |
253 | NFS4_STATEID_OTHER_SIZE)) | |
2597641d AB |
254 | return 0; |
255 | ||
256 | return 1; | |
257 | } | |
258 | ||
68f3f901 RL |
259 | /* |
260 | * Validate the sequenceID sent by the server. | |
261 | * Return success if the sequenceID is one more than what we last saw on | |
262 | * this slot, accounting for wraparound. Increments the slot's sequence. | |
263 | * | |
4911096f AA |
264 | * We don't yet implement a duplicate request cache, instead we set the |
265 | * back channel ca_maxresponsesize_cached to zero. This is OK for now | |
68f3f901 RL |
266 | * since we only currently implement idempotent callbacks anyway. |
267 | * | |
268 | * We have a single slot backchannel at this time, so we don't bother | |
269 | * checking the used_slots bit array on the table. The lower layer guarantees | |
270 | * a single outstanding callback request at a time. | |
271 | */ | |
9733f0d9 | 272 | static __be32 |
b2f28bd7 | 273 | validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) |
68f3f901 RL |
274 | { |
275 | struct nfs4_slot *slot; | |
276 | ||
277 | dprintk("%s enter. slotid %d seqid %d\n", | |
b2f28bd7 | 278 | __func__, args->csa_slotid, args->csa_sequenceid); |
68f3f901 | 279 | |
b2f28bd7 | 280 | if (args->csa_slotid > NFS41_BC_MAX_CALLBACKS) |
68f3f901 RL |
281 | return htonl(NFS4ERR_BADSLOT); |
282 | ||
b2f28bd7 | 283 | slot = tbl->slots + args->csa_slotid; |
68f3f901 RL |
284 | dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr); |
285 | ||
286 | /* Normal */ | |
b2f28bd7 | 287 | if (likely(args->csa_sequenceid == slot->seq_nr + 1)) { |
68f3f901 RL |
288 | slot->seq_nr++; |
289 | return htonl(NFS4_OK); | |
290 | } | |
291 | ||
292 | /* Replay */ | |
b2f28bd7 | 293 | if (args->csa_sequenceid == slot->seq_nr) { |
4911096f | 294 | dprintk("%s seqid %d is a replay\n", |
b2f28bd7 | 295 | __func__, args->csa_sequenceid); |
4911096f AA |
296 | /* Signal process_op to set this error on next op */ |
297 | if (args->csa_cachethis == 0) | |
298 | return htonl(NFS4ERR_RETRY_UNCACHED_REP); | |
299 | ||
300 | /* The ca_maxresponsesize_cached is 0 with no DRC */ | |
301 | else if (args->csa_cachethis == 1) | |
302 | return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE); | |
68f3f901 RL |
303 | } |
304 | ||
305 | /* Wraparound */ | |
b2f28bd7 | 306 | if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) { |
68f3f901 RL |
307 | slot->seq_nr = 1; |
308 | return htonl(NFS4_OK); | |
309 | } | |
310 | ||
311 | /* Misordered request */ | |
312 | return htonl(NFS4ERR_SEQ_MISORDERED); | |
313 | } | |
314 | ||
a7989c3e MS |
315 | /* |
316 | * For each referring call triple, check the session's slot table for | |
317 | * a match. If the slot is in use and the sequence numbers match, the | |
318 | * client is still waiting for a response to the original request. | |
319 | */ | |
320 | static bool referring_call_exists(struct nfs_client *clp, | |
321 | uint32_t nrclists, | |
322 | struct referring_call_list *rclists) | |
323 | { | |
324 | bool status = 0; | |
325 | int i, j; | |
326 | struct nfs4_session *session; | |
327 | struct nfs4_slot_table *tbl; | |
328 | struct referring_call_list *rclist; | |
329 | struct referring_call *ref; | |
330 | ||
331 | /* | |
332 | * XXX When client trunking is implemented, this becomes | |
333 | * a session lookup from within the loop | |
334 | */ | |
335 | session = clp->cl_session; | |
336 | tbl = &session->fc_slot_table; | |
337 | ||
338 | for (i = 0; i < nrclists; i++) { | |
339 | rclist = &rclists[i]; | |
340 | if (memcmp(session->sess_id.data, | |
341 | rclist->rcl_sessionid.data, | |
342 | NFS4_MAX_SESSIONID_LEN) != 0) | |
343 | continue; | |
344 | ||
345 | for (j = 0; j < rclist->rcl_nrefcalls; j++) { | |
346 | ref = &rclist->rcl_refcalls[j]; | |
347 | ||
348 | dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " | |
349 | "slotid %u\n", __func__, | |
350 | ((u32 *)&rclist->rcl_sessionid.data)[0], | |
351 | ((u32 *)&rclist->rcl_sessionid.data)[1], | |
352 | ((u32 *)&rclist->rcl_sessionid.data)[2], | |
353 | ((u32 *)&rclist->rcl_sessionid.data)[3], | |
354 | ref->rc_sequenceid, ref->rc_slotid); | |
355 | ||
356 | spin_lock(&tbl->slot_tbl_lock); | |
357 | status = (test_bit(ref->rc_slotid, tbl->used_slots) && | |
358 | tbl->slots[ref->rc_slotid].seq_nr == | |
359 | ref->rc_sequenceid); | |
360 | spin_unlock(&tbl->slot_tbl_lock); | |
361 | if (status) | |
362 | goto out; | |
363 | } | |
364 | } | |
365 | ||
366 | out: | |
367 | return status; | |
368 | } | |
369 | ||
9733f0d9 | 370 | __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
c36fca52 AA |
371 | struct cb_sequenceres *res, |
372 | struct cb_process_state *cps) | |
d49433e1 | 373 | { |
68f3f901 | 374 | struct nfs_client *clp; |
9733f0d9 | 375 | int i; |
778be232 | 376 | __be32 status = htonl(NFS4ERR_BADSESSION); |
d49433e1 | 377 | |
c36fca52 AA |
378 | cps->clp = NULL; |
379 | ||
778be232 | 380 | clp = nfs4_find_client_sessionid(args->csa_addr, &args->csa_sessionid); |
68f3f901 RL |
381 | if (clp == NULL) |
382 | goto out; | |
383 | ||
42acd021 AA |
384 | /* state manager is resetting the session */ |
385 | if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { | |
386 | status = NFS4ERR_DELAY; | |
387 | goto out; | |
388 | } | |
389 | ||
b2f28bd7 | 390 | status = validate_seqid(&clp->cl_session->bc_slot_table, args); |
68f3f901 | 391 | if (status) |
c36fca52 | 392 | goto out; |
68f3f901 | 393 | |
72ce2b3c MS |
394 | /* |
395 | * Check for pending referring calls. If a match is found, a | |
396 | * related callback was received before the response to the original | |
397 | * call. | |
398 | */ | |
399 | if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { | |
400 | status = htonl(NFS4ERR_DELAY); | |
c36fca52 | 401 | goto out; |
72ce2b3c MS |
402 | } |
403 | ||
d49433e1 BH |
404 | memcpy(&res->csr_sessionid, &args->csa_sessionid, |
405 | sizeof(res->csr_sessionid)); | |
406 | res->csr_sequenceid = args->csa_sequenceid; | |
407 | res->csr_slotid = args->csa_slotid; | |
408 | res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
409 | res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; | |
42acd021 | 410 | nfs4_cb_take_slot(clp); |
c36fca52 | 411 | cps->clp = clp; /* put in nfs4_callback_compound */ |
d49433e1 | 412 | |
68f3f901 | 413 | out: |
72ce2b3c MS |
414 | for (i = 0; i < args->csa_nrclists; i++) |
415 | kfree(args->csa_rclists[i].rcl_refcalls); | |
416 | kfree(args->csa_rclists); | |
417 | ||
c36fca52 AA |
418 | if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { |
419 | cps->drc_status = status; | |
420 | status = 0; | |
421 | } else | |
4911096f | 422 | res->csr_status = status; |
c36fca52 | 423 | |
4911096f AA |
424 | dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, |
425 | ntohl(status), ntohl(res->csr_status)); | |
426 | return status; | |
d49433e1 BH |
427 | } |
428 | ||
36840370 AB |
429 | static bool |
430 | validate_bitmap_values(unsigned long mask) | |
431 | { | |
432 | return (mask & ~RCA4_TYPE_MASK_ALL) == 0; | |
433 | } | |
434 | ||
c36fca52 AA |
435 | __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, |
436 | struct cb_process_state *cps) | |
31f09607 | 437 | { |
9733f0d9 | 438 | __be32 status; |
31f09607 AB |
439 | fmode_t flags = 0; |
440 | ||
36840370 | 441 | status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); |
c36fca52 | 442 | if (!cps->clp) /* set in cb_sequence */ |
31f09607 AB |
443 | goto out; |
444 | ||
445 | dprintk("NFS: RECALL_ANY callback request from %s\n", | |
c36fca52 | 446 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); |
31f09607 | 447 | |
36840370 AB |
448 | status = cpu_to_be32(NFS4ERR_INVAL); |
449 | if (!validate_bitmap_values(args->craa_type_mask)) | |
450 | goto out; | |
451 | ||
452 | status = cpu_to_be32(NFS4_OK); | |
31f09607 AB |
453 | if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) |
454 | &args->craa_type_mask)) | |
455 | flags = FMODE_READ; | |
456 | if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) | |
457 | &args->craa_type_mask)) | |
458 | flags |= FMODE_WRITE; | |
36840370 AB |
459 | if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) |
460 | &args->craa_type_mask)) | |
461 | pnfs_recall_all_layouts(cps->clp); | |
31f09607 | 462 | if (flags) |
c36fca52 | 463 | nfs_expire_all_delegation_types(cps->clp, flags); |
31f09607 AB |
464 | out: |
465 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
466 | return status; | |
467 | } | |
b9efa1b2 AA |
468 | |
469 | /* Reduce the fore channel's max_slots to the target value */ | |
c36fca52 AA |
470 | __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, |
471 | struct cb_process_state *cps) | |
b9efa1b2 | 472 | { |
b9efa1b2 | 473 | struct nfs4_slot_table *fc_tbl; |
9733f0d9 | 474 | __be32 status; |
b9efa1b2 AA |
475 | |
476 | status = htonl(NFS4ERR_OP_NOT_IN_SESSION); | |
c36fca52 | 477 | if (!cps->clp) /* set in cb_sequence */ |
b9efa1b2 AA |
478 | goto out; |
479 | ||
480 | dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", | |
c36fca52 | 481 | rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), |
b9efa1b2 AA |
482 | args->crsa_target_max_slots); |
483 | ||
c36fca52 | 484 | fc_tbl = &cps->clp->cl_session->fc_slot_table; |
b9efa1b2 AA |
485 | |
486 | status = htonl(NFS4ERR_BAD_HIGH_SLOT); | |
bae0ac0e | 487 | if (args->crsa_target_max_slots > fc_tbl->max_slots || |
b9efa1b2 | 488 | args->crsa_target_max_slots < 1) |
c36fca52 | 489 | goto out; |
bae0ac0e AA |
490 | |
491 | status = htonl(NFS4_OK); | |
492 | if (args->crsa_target_max_slots == fc_tbl->max_slots) | |
c36fca52 | 493 | goto out; |
b9efa1b2 AA |
494 | |
495 | fc_tbl->target_max_slots = args->crsa_target_max_slots; | |
c36fca52 | 496 | nfs41_handle_recall_slot(cps->clp); |
b9efa1b2 AA |
497 | out: |
498 | dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); | |
499 | return status; | |
500 | } | |
d49433e1 | 501 | #endif /* CONFIG_NFS_V4_1 */ |