blob: 1b5d809a105e42d992344aad78fb57526c2af8fa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfs/callback_proc.c
3 *
4 * Copyright (C) 2004 Trond Myklebust
5 *
6 * NFSv4 callback procedures
7 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/nfs4.h>
9#include <linux/nfs_fs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Trond Myklebust2446ab62012-03-01 17:00:56 -050011#include <linux/rcupdate.h>
Trond Myklebust4ce79712005-06-22 17:16:21 +000012#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include "callback.h"
14#include "delegation.h"
David Howells24c8dbb2006-08-22 20:06:10 -040015#include "internal.h"
Fred Isaman43f1b3d2011-01-06 11:36:30 +000016#include "pnfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Chuck Lever1d98fe62007-12-10 14:57:23 -050018#ifdef NFS_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#define NFSDBG_FACILITY NFSDBG_CALLBACK
Chuck Lever1d98fe62007-12-10 14:57:23 -050020#endif
Andy Adamsonc36fca52011-01-06 02:04:32 +000021
22__be32 nfs4_callback_getattr(struct cb_getattrargs *args,
23 struct cb_getattrres *res,
24 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025{
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 struct nfs_delegation *delegation;
27 struct nfs_inode *nfsi;
28 struct inode *inode;
Chuck Lever1d98fe62007-12-10 14:57:23 -050029
Andy Adamsonc36fca52011-01-06 02:04:32 +000030 res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
31 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 goto out;
Chuck Lever1d98fe62007-12-10 14:57:23 -050033
Andy Adamsonc36fca52011-01-06 02:04:32 +000034 res->bitmap[0] = res->bitmap[1] = 0;
35 res->status = htonl(NFS4ERR_BADHANDLE);
Chuck Lever1d98fe62007-12-10 14:57:23 -050036
Trond Myklebust2446ab62012-03-01 17:00:56 -050037 dprintk_rcu("NFS: GETATTR callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +000038 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
39
40 inode = nfs_delegation_find_inode(cps->clp, &args->fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 if (inode == NULL)
Andy Adamsonc36fca52011-01-06 02:04:32 +000042 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 nfsi = NFS_I(inode);
Trond Myklebust761fe932010-08-04 09:29:52 -040044 rcu_read_lock();
45 delegation = rcu_dereference(nfsi->delegation);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
47 goto out_iput;
48 res->size = i_size_read(inode);
Trond Myklebustbeb2a5e2006-01-03 09:55:37 +010049 res->change_attr = delegation->change_attr;
50 if (nfsi->npages != 0)
51 res->change_attr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 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;
59out_iput:
Trond Myklebust761fe932010-08-04 09:29:52 -040060 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062out:
Harvey Harrison3110ff82008-05-02 13:42:44 -070063 dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 return res->status;
65}
66
Andy Adamsonc36fca52011-01-06 02:04:32 +000067__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
68 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 struct inode *inode;
Al Viroe6f684f2006-10-19 23:28:50 -070071 __be32 res;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
Andy Adamsonc36fca52011-01-06 02:04:32 +000073 res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
74 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 goto out;
Chuck Lever1d98fe62007-12-10 14:57:23 -050076
Trond Myklebust2446ab62012-03-01 17:00:56 -050077 dprintk_rcu("NFS: RECALL callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +000078 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
Chuck Lever1d98fe62007-12-10 14:57:23 -050079
Andy Adamsonc36fca52011-01-06 02:04:32 +000080 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:
Trond Myklebust8e663f02012-03-04 18:13:56 -050090 res = htonl(NFS4ERR_BAD_STATEID);
Andy Adamsonc36fca52011-01-06 02:04:32 +000091 break;
92 default:
93 res = htonl(NFS4ERR_RESOURCE);
94 }
95 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096out:
Harvey Harrison3110ff82008-05-02 13:42:44 -070097 dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 return res;
99}
Benny Halevyd49433e2009-04-01 09:23:25 -0400100
101#if defined(CONFIG_NFS_V4_1)
102
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200103/*
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 */
112static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh)
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000113{
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400114 struct nfs_server *server;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000115 struct inode *ino;
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200116 struct pnfs_layout_hdr *lo;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000117
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400118 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
119 list_for_each_entry(lo, &server->layouts, plh_layouts) {
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200120 if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh))
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400121 continue;
122 ino = igrab(lo->plh_inode);
123 if (!ino)
124 continue;
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400125 get_layout_hdr(lo);
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200126 return lo;
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400127 }
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000128 }
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200129
130 return NULL;
131}
132
133static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh)
134{
135 struct pnfs_layout_hdr *lo;
136
137 spin_lock(&clp->cl_lock);
138 rcu_read_lock();
139 lo = get_layout_by_fh_locked(clp, fh);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400140 rcu_read_unlock();
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000141 spin_unlock(&clp->cl_lock);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400142
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200143 return lo;
144}
145
146static u32 initiate_file_draining(struct nfs_client *clp,
147 struct cb_layoutrecallargs *args)
148{
149 struct inode *ino;
150 struct pnfs_layout_hdr *lo;
151 u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
152 LIST_HEAD(free_me_list);
153
154 lo = get_layout_by_fh(clp, &args->cbl_fh);
155 if (!lo)
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000156 return NFS4ERR_NOMATCHING_LAYOUT;
157
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200158 ino = lo->plh_inode;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000159 spin_lock(&ino->i_lock);
160 if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
161 mark_matching_lsegs_invalid(lo, &free_me_list,
Benny Halevy778b5502011-05-22 19:48:02 +0300162 &args->cbl_range))
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000163 rv = NFS4ERR_DELAY;
164 else
165 rv = NFS4ERR_NOMATCHING_LAYOUT;
166 pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
167 spin_unlock(&ino->i_lock);
168 pnfs_free_lseg_list(&free_me_list);
169 put_layout_hdr(lo);
170 iput(ino);
171 return rv;
172}
173
174static u32 initiate_bulk_draining(struct nfs_client *clp,
175 struct cb_layoutrecallargs *args)
176{
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400177 struct nfs_server *server;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000178 struct pnfs_layout_hdr *lo;
179 struct inode *ino;
180 u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
181 struct pnfs_layout_hdr *tmp;
182 LIST_HEAD(recall_list);
183 LIST_HEAD(free_me_list);
184 struct pnfs_layout_range range = {
185 .iomode = IOMODE_ANY,
186 .offset = 0,
187 .length = NFS4_MAX_UINT64,
188 };
189
190 spin_lock(&clp->cl_lock);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400191 rcu_read_lock();
192 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000193 if ((args->cbl_recall_type == RETURN_FSID) &&
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400194 memcmp(&server->fsid, &args->cbl_fsid,
195 sizeof(struct nfs_fsid)))
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000196 continue;
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400197
198 list_for_each_entry(lo, &server->layouts, plh_layouts) {
199 if (!igrab(lo->plh_inode))
200 continue;
201 get_layout_hdr(lo);
202 BUG_ON(!list_empty(&lo->plh_bulk_recall));
203 list_add(&lo->plh_bulk_recall, &recall_list);
204 }
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000205 }
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400206 rcu_read_unlock();
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000207 spin_unlock(&clp->cl_lock);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400208
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000209 list_for_each_entry_safe(lo, tmp,
210 &recall_list, plh_bulk_recall) {
211 ino = lo->plh_inode;
212 spin_lock(&ino->i_lock);
213 set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
Benny Halevy778b5502011-05-22 19:48:02 +0300214 if (mark_matching_lsegs_invalid(lo, &free_me_list, &range))
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000215 rv = NFS4ERR_DELAY;
216 list_del_init(&lo->plh_bulk_recall);
217 spin_unlock(&ino->i_lock);
Fred Isamanf49f9ba2011-02-03 18:28:52 +0000218 pnfs_free_lseg_list(&free_me_list);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000219 put_layout_hdr(lo);
220 iput(ino);
221 }
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000222 return rv;
223}
224
225static u32 do_callback_layoutrecall(struct nfs_client *clp,
226 struct cb_layoutrecallargs *args)
227{
Trond Myklebust0cb32842012-03-01 11:17:50 -0500228 u32 res;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000229
230 dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000231 if (args->cbl_recall_type == RETURN_FILE)
232 res = initiate_file_draining(clp, args);
233 else
234 res = initiate_bulk_draining(clp, args);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000235 dprintk("%s returning %i\n", __func__, res);
236 return res;
237
238}
239
Fred Isamanf2a62562011-01-06 11:36:29 +0000240__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args,
241 void *dummy, struct cb_process_state *cps)
242{
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000243 u32 res;
244
245 dprintk("%s: -->\n", __func__);
246
247 if (cps->clp)
248 res = do_callback_layoutrecall(cps->clp, args);
249 else
250 res = NFS4ERR_OP_NOT_IN_SESSION;
251
252 dprintk("%s: exit with status = %d\n", __func__, res);
253 return cpu_to_be32(res);
Fred Isamanf2a62562011-01-06 11:36:29 +0000254}
255
Alexandros Batsakis36840372011-01-06 11:36:31 +0000256static void pnfs_recall_all_layouts(struct nfs_client *clp)
257{
258 struct cb_layoutrecallargs args;
259
260 /* Pretend we got a CB_LAYOUTRECALL(ALL) */
261 memset(&args, 0, sizeof(args));
262 args.cbl_recall_type = RETURN_ALL;
263 /* FIXME we ignore errors, what should we do? */
264 do_callback_layoutrecall(clp, &args);
265}
266
Marc Eshel1be56832011-05-22 19:47:09 +0300267__be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args,
268 void *dummy, struct cb_process_state *cps)
269{
270 int i;
271 __be32 res = 0;
272 struct nfs_client *clp = cps->clp;
273 struct nfs_server *server = NULL;
274
275 dprintk("%s: -->\n", __func__);
276
277 if (!clp) {
278 res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
279 goto out;
280 }
281
282 for (i = 0; i < args->ndevs; i++) {
283 struct cb_devicenotifyitem *dev = &args->devs[i];
284
285 if (!server ||
286 server->pnfs_curr_ld->id != dev->cbd_layout_type) {
287 rcu_read_lock();
288 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
289 if (server->pnfs_curr_ld &&
290 server->pnfs_curr_ld->id == dev->cbd_layout_type) {
291 rcu_read_unlock();
292 goto found;
293 }
294 rcu_read_unlock();
295 dprintk("%s: layout type %u not found\n",
296 __func__, dev->cbd_layout_type);
297 continue;
298 }
299
300 found:
301 if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE)
302 dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, "
303 "deleting instead\n", __func__);
Benny Halevy35c8bb52011-05-24 18:04:02 +0300304 nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
Marc Eshel1be56832011-05-22 19:47:09 +0300305 }
306
307out:
308 kfree(args->devs);
309 dprintk("%s: exit with status = %u\n",
310 __func__, be32_to_cpu(res));
311 return res;
312}
313
Ricardo Labiaga963891a2009-04-01 09:23:34 -0400314/*
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400315 * Validate the sequenceID sent by the server.
316 * Return success if the sequenceID is one more than what we last saw on
317 * this slot, accounting for wraparound. Increments the slot's sequence.
318 *
Andy Adamson49110962010-01-14 17:45:08 -0500319 * We don't yet implement a duplicate request cache, instead we set the
320 * back channel ca_maxresponsesize_cached to zero. This is OK for now
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400321 * since we only currently implement idempotent callbacks anyway.
322 *
323 * We have a single slot backchannel at this time, so we don't bother
324 * checking the used_slots bit array on the table. The lower layer guarantees
325 * a single outstanding callback request at a time.
326 */
Andy Adamson9733f0d2010-01-22 12:03:08 -0500327static __be32
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500328validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400329{
330 struct nfs4_slot *slot;
331
332 dprintk("%s enter. slotid %d seqid %d\n",
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500333 __func__, args->csa_slotid, args->csa_sequenceid);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400334
Andy Adamson61f2e512011-11-09 13:58:20 -0500335 if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS)
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400336 return htonl(NFS4ERR_BADSLOT);
337
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500338 slot = tbl->slots + args->csa_slotid;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400339 dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr);
340
341 /* Normal */
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500342 if (likely(args->csa_sequenceid == slot->seq_nr + 1)) {
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400343 slot->seq_nr++;
Trond Myklebust55a67392011-08-02 14:46:29 -0400344 goto out_ok;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400345 }
346
347 /* Replay */
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500348 if (args->csa_sequenceid == slot->seq_nr) {
Andy Adamson49110962010-01-14 17:45:08 -0500349 dprintk("%s seqid %d is a replay\n",
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500350 __func__, args->csa_sequenceid);
Andy Adamson49110962010-01-14 17:45:08 -0500351 /* Signal process_op to set this error on next op */
352 if (args->csa_cachethis == 0)
353 return htonl(NFS4ERR_RETRY_UNCACHED_REP);
354
355 /* The ca_maxresponsesize_cached is 0 with no DRC */
356 else if (args->csa_cachethis == 1)
357 return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400358 }
359
360 /* Wraparound */
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500361 if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) {
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400362 slot->seq_nr = 1;
Trond Myklebust55a67392011-08-02 14:46:29 -0400363 goto out_ok;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400364 }
365
366 /* Misordered request */
367 return htonl(NFS4ERR_SEQ_MISORDERED);
Trond Myklebust55a67392011-08-02 14:46:29 -0400368out_ok:
369 tbl->highest_used_slotid = args->csa_slotid;
370 return htonl(NFS4_OK);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400371}
372
373/*
Mike Sagera7989c32010-01-19 12:54:40 -0500374 * For each referring call triple, check the session's slot table for
375 * a match. If the slot is in use and the sequence numbers match, the
376 * client is still waiting for a response to the original request.
377 */
378static bool referring_call_exists(struct nfs_client *clp,
379 uint32_t nrclists,
380 struct referring_call_list *rclists)
381{
382 bool status = 0;
383 int i, j;
384 struct nfs4_session *session;
385 struct nfs4_slot_table *tbl;
386 struct referring_call_list *rclist;
387 struct referring_call *ref;
388
389 /*
390 * XXX When client trunking is implemented, this becomes
391 * a session lookup from within the loop
392 */
393 session = clp->cl_session;
394 tbl = &session->fc_slot_table;
395
396 for (i = 0; i < nrclists; i++) {
397 rclist = &rclists[i];
398 if (memcmp(session->sess_id.data,
399 rclist->rcl_sessionid.data,
400 NFS4_MAX_SESSIONID_LEN) != 0)
401 continue;
402
403 for (j = 0; j < rclist->rcl_nrefcalls; j++) {
404 ref = &rclist->rcl_refcalls[j];
405
406 dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u "
407 "slotid %u\n", __func__,
408 ((u32 *)&rclist->rcl_sessionid.data)[0],
409 ((u32 *)&rclist->rcl_sessionid.data)[1],
410 ((u32 *)&rclist->rcl_sessionid.data)[2],
411 ((u32 *)&rclist->rcl_sessionid.data)[3],
412 ref->rc_sequenceid, ref->rc_slotid);
413
414 spin_lock(&tbl->slot_tbl_lock);
415 status = (test_bit(ref->rc_slotid, tbl->used_slots) &&
416 tbl->slots[ref->rc_slotid].seq_nr ==
417 ref->rc_sequenceid);
418 spin_unlock(&tbl->slot_tbl_lock);
419 if (status)
420 goto out;
421 }
422 }
423
424out:
425 return status;
426}
427
Andy Adamson9733f0d2010-01-22 12:03:08 -0500428__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000429 struct cb_sequenceres *res,
430 struct cb_process_state *cps)
Benny Halevyd49433e2009-04-01 09:23:25 -0400431{
Trond Myklebust55a67392011-08-02 14:46:29 -0400432 struct nfs4_slot_table *tbl;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400433 struct nfs_client *clp;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500434 int i;
Andy Adamson778be232011-01-25 15:38:01 +0000435 __be32 status = htonl(NFS4ERR_BADSESSION);
Benny Halevyd49433e2009-04-01 09:23:25 -0400436
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +0400437 clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400438 if (clp == NULL)
439 goto out;
440
Trond Myklebust55a67392011-08-02 14:46:29 -0400441 tbl = &clp->cl_session->bc_slot_table;
442
443 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson42acd022011-01-06 02:04:34 +0000444 /* state manager is resetting the session */
445 if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) {
Trond Myklebust55a67392011-08-02 14:46:29 -0400446 spin_unlock(&tbl->slot_tbl_lock);
447 status = htonl(NFS4ERR_DELAY);
Trond Myklebust910ac682011-08-02 14:46:52 -0400448 /* Return NFS4ERR_BADSESSION if we're draining the session
449 * in order to reset it.
450 */
451 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
452 status = htonl(NFS4ERR_BADSESSION);
Andy Adamson42acd022011-01-06 02:04:34 +0000453 goto out;
454 }
455
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500456 status = validate_seqid(&clp->cl_session->bc_slot_table, args);
Trond Myklebust55a67392011-08-02 14:46:29 -0400457 spin_unlock(&tbl->slot_tbl_lock);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400458 if (status)
Andy Adamsonc36fca52011-01-06 02:04:32 +0000459 goto out;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400460
Trond Myklebust55a67392011-08-02 14:46:29 -0400461 cps->slotid = args->csa_slotid;
462
Mike Sager72ce2b32010-01-19 12:54:41 -0500463 /*
464 * Check for pending referring calls. If a match is found, a
465 * related callback was received before the response to the original
466 * call.
467 */
468 if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
469 status = htonl(NFS4ERR_DELAY);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000470 goto out;
Mike Sager72ce2b32010-01-19 12:54:41 -0500471 }
472
Benny Halevyd49433e2009-04-01 09:23:25 -0400473 memcpy(&res->csr_sessionid, &args->csa_sessionid,
474 sizeof(res->csr_sessionid));
475 res->csr_sequenceid = args->csa_sequenceid;
476 res->csr_slotid = args->csa_slotid;
477 res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
478 res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
479
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400480out:
Andy Adamson2c4cdf82011-01-25 15:38:02 +0000481 cps->clp = clp; /* put in nfs4_callback_compound */
Mike Sager72ce2b32010-01-19 12:54:41 -0500482 for (i = 0; i < args->csa_nrclists; i++)
483 kfree(args->csa_rclists[i].rcl_refcalls);
484 kfree(args->csa_rclists);
485
Andy Adamsonc36fca52011-01-06 02:04:32 +0000486 if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
487 cps->drc_status = status;
488 status = 0;
489 } else
Andy Adamson49110962010-01-14 17:45:08 -0500490 res->csr_status = status;
Andy Adamsonc36fca52011-01-06 02:04:32 +0000491
Andy Adamson49110962010-01-14 17:45:08 -0500492 dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
493 ntohl(status), ntohl(res->csr_status));
494 return status;
Benny Halevyd49433e2009-04-01 09:23:25 -0400495}
496
Alexandros Batsakis36840372011-01-06 11:36:31 +0000497static bool
498validate_bitmap_values(unsigned long mask)
499{
500 return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
501}
502
Andy Adamsonc36fca52011-01-06 02:04:32 +0000503__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
504 struct cb_process_state *cps)
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500505{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500506 __be32 status;
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500507 fmode_t flags = 0;
508
Alexandros Batsakis36840372011-01-06 11:36:31 +0000509 status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000510 if (!cps->clp) /* set in cb_sequence */
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500511 goto out;
512
Trond Myklebust2446ab62012-03-01 17:00:56 -0500513 dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +0000514 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500515
Alexandros Batsakis36840372011-01-06 11:36:31 +0000516 status = cpu_to_be32(NFS4ERR_INVAL);
517 if (!validate_bitmap_values(args->craa_type_mask))
518 goto out;
519
520 status = cpu_to_be32(NFS4_OK);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500521 if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *)
522 &args->craa_type_mask))
523 flags = FMODE_READ;
524 if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *)
525 &args->craa_type_mask))
526 flags |= FMODE_WRITE;
Alexandros Batsakis36840372011-01-06 11:36:31 +0000527 if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *)
528 &args->craa_type_mask))
529 pnfs_recall_all_layouts(cps->clp);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500530 if (flags)
Andy Adamsonc36fca52011-01-06 02:04:32 +0000531 nfs_expire_all_delegation_types(cps->clp, flags);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500532out:
533 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
534 return status;
535}
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500536
537/* Reduce the fore channel's max_slots to the target value */
Andy Adamsonc36fca52011-01-06 02:04:32 +0000538__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
539 struct cb_process_state *cps)
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500540{
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500541 struct nfs4_slot_table *fc_tbl;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500542 __be32 status;
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500543
544 status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000545 if (!cps->clp) /* set in cb_sequence */
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500546 goto out;
547
Trond Myklebust2446ab62012-03-01 17:00:56 -0500548 dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +0000549 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500550 args->crsa_target_max_slots);
551
Andy Adamsonc36fca52011-01-06 02:04:32 +0000552 fc_tbl = &cps->clp->cl_session->fc_slot_table;
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500553
554 status = htonl(NFS4ERR_BAD_HIGH_SLOT);
Andy Adamsonbae0ac02010-01-21 14:19:16 -0500555 if (args->crsa_target_max_slots > fc_tbl->max_slots ||
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500556 args->crsa_target_max_slots < 1)
Andy Adamsonc36fca52011-01-06 02:04:32 +0000557 goto out;
Andy Adamsonbae0ac02010-01-21 14:19:16 -0500558
559 status = htonl(NFS4_OK);
560 if (args->crsa_target_max_slots == fc_tbl->max_slots)
Andy Adamsonc36fca52011-01-06 02:04:32 +0000561 goto out;
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500562
563 fc_tbl->target_max_slots = args->crsa_target_max_slots;
Andy Adamsonc36fca52011-01-06 02:04:32 +0000564 nfs41_handle_recall_slot(cps->clp);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500565out:
566 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
567 return status;
568}
Benny Halevyd49433e2009-04-01 09:23:25 -0400569#endif /* CONFIG_NFS_V4_1 */