blob: b85cf7a30232a39fb5049a098a0bde40a9563df2 [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"
Trond Myklebust73e39aa2012-11-26 12:49:34 -050017#include "nfs4session.h"
Trond Myklebustca8acf82013-08-13 10:36:56 -040018#include "nfs4trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Chuck Lever1d98fe62007-12-10 14:57:23 -050020#ifdef NFS_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#define NFSDBG_FACILITY NFSDBG_CALLBACK
Chuck Lever1d98fe62007-12-10 14:57:23 -050022#endif
Andy Adamsonc36fca52011-01-06 02:04:32 +000023
24__be32 nfs4_callback_getattr(struct cb_getattrargs *args,
25 struct cb_getattrres *res,
26 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027{
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 struct nfs_delegation *delegation;
29 struct nfs_inode *nfsi;
30 struct inode *inode;
Chuck Lever1d98fe62007-12-10 14:57:23 -050031
Andy Adamsonc36fca52011-01-06 02:04:32 +000032 res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
33 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 goto out;
Chuck Lever1d98fe62007-12-10 14:57:23 -050035
Andy Adamsonc36fca52011-01-06 02:04:32 +000036 res->bitmap[0] = res->bitmap[1] = 0;
37 res->status = htonl(NFS4ERR_BADHANDLE);
Chuck Lever1d98fe62007-12-10 14:57:23 -050038
Trond Myklebust2446ab62012-03-01 17:00:56 -050039 dprintk_rcu("NFS: GETATTR callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +000040 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
41
42 inode = nfs_delegation_find_inode(cps->clp, &args->fh);
Trond Myklebust7cd14862015-08-20 20:07:54 -050043 if (inode == NULL) {
Trond Myklebust249b2ee2015-08-20 20:43:14 -050044 trace_nfs4_cb_getattr(cps->clp, &args->fh, NULL,
Trond Myklebust7cd14862015-08-20 20:07:54 -050045 -ntohl(res->status));
Andy Adamsonc36fca52011-01-06 02:04:32 +000046 goto out;
Trond Myklebust7cd14862015-08-20 20:07:54 -050047 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 nfsi = NFS_I(inode);
Trond Myklebust761fe932010-08-04 09:29:52 -040049 rcu_read_lock();
50 delegation = rcu_dereference(nfsi->delegation);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
52 goto out_iput;
53 res->size = i_size_read(inode);
Trond Myklebustbeb2a5e2006-01-03 09:55:37 +010054 res->change_attr = delegation->change_attr;
Weston Andros Adamsoncb1410c2014-11-12 12:08:00 -050055 if (nfsi->nrequests != 0)
Trond Myklebustbeb2a5e2006-01-03 09:55:37 +010056 res->change_attr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 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;
64out_iput:
Trond Myklebust761fe932010-08-04 09:29:52 -040065 rcu_read_unlock();
Trond Myklebust7cd14862015-08-20 20:07:54 -050066 trace_nfs4_cb_getattr(cps->clp, &args->fh, inode, -ntohl(res->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068out:
Harvey Harrison3110ff82008-05-02 13:42:44 -070069 dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 return res->status;
71}
72
Andy Adamsonc36fca52011-01-06 02:04:32 +000073__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
74 struct cb_process_state *cps)
Linus Torvalds1da177e2005-04-16 15:20:36 -070075{
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 struct inode *inode;
Al Viroe6f684f2006-10-19 23:28:50 -070077 __be32 res;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Andy Adamsonc36fca52011-01-06 02:04:32 +000079 res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
80 if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 goto out;
Chuck Lever1d98fe62007-12-10 14:57:23 -050082
Trond Myklebust2446ab62012-03-01 17:00:56 -050083 dprintk_rcu("NFS: RECALL callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +000084 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
Chuck Lever1d98fe62007-12-10 14:57:23 -050085
Andy Adamsonc36fca52011-01-06 02:04:32 +000086 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:
Trond Myklebust8e663f02012-03-04 18:13:56 -050096 res = htonl(NFS4ERR_BAD_STATEID);
Andy Adamsonc36fca52011-01-06 02:04:32 +000097 break;
98 default:
99 res = htonl(NFS4ERR_RESOURCE);
100 }
Trond Myklebustca8acf82013-08-13 10:36:56 -0400101 trace_nfs4_recall_delegation(inode, -ntohl(res));
Andy Adamsonc36fca52011-01-06 02:04:32 +0000102 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103out:
Harvey Harrison3110ff82008-05-02 13:42:44 -0700104 dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 return res;
106}
Benny Halevyd49433e2009-04-01 09:23:25 -0400107
108#if defined(CONFIG_NFS_V4_1)
109
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200110/*
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 */
Trond Myklebust27999f22014-02-12 08:12:42 -0500119static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp,
120 struct nfs_fh *fh, nfs4_stateid *stateid)
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000121{
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400122 struct nfs_server *server;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000123 struct inode *ino;
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200124 struct pnfs_layout_hdr *lo;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000125
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400126 list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
127 list_for_each_entry(lo, &server->layouts, plh_layouts) {
Trond Myklebust27999f22014-02-12 08:12:42 -0500128 if (!nfs4_stateid_match_other(&lo->plh_stateid, stateid))
129 continue;
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200130 if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh))
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400131 continue;
132 ino = igrab(lo->plh_inode);
133 if (!ino)
Trond Myklebust9a7fe9e82014-02-12 08:17:00 -0500134 break;
Trond Myklebust9c626382012-09-20 17:31:43 -0400135 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);
Trond Myklebust9a7fe9e82014-02-12 08:17:00 -0500140 break;
Trond Myklebust9c626382012-09-20 17:31:43 -0400141 }
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400142 pnfs_get_layout_hdr(lo);
Trond Myklebust9c626382012-09-20 17:31:43 -0400143 spin_unlock(&ino->i_lock);
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200144 return lo;
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400145 }
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000146 }
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200147
148 return NULL;
149}
150
Trond Myklebust27999f22014-02-12 08:12:42 -0500151static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp,
152 struct nfs_fh *fh, nfs4_stateid *stateid)
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200153{
154 struct pnfs_layout_hdr *lo;
155
156 spin_lock(&clp->cl_lock);
157 rcu_read_lock();
Trond Myklebust27999f22014-02-12 08:12:42 -0500158 lo = get_layout_by_fh_locked(clp, fh, stateid);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400159 rcu_read_unlock();
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000160 spin_unlock(&clp->cl_lock);
Weston Andros Adamson6382a442011-06-01 16:44:44 -0400161
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200162 return lo;
163}
164
165static 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
Trond Myklebust27999f22014-02-12 08:12:42 -0500173 lo = get_layout_by_fh(clp, &args->cbl_fh, &args->cbl_stateid);
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200174 if (!lo)
Trond Myklebust27999f22014-02-12 08:12:42 -0500175 goto out;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000176
Benny Halevyd36b7cf2012-01-22 16:03:39 +0200177 ino = lo->plh_inode;
Christoph Hellwig7c5d1872014-09-10 08:23:29 -0700178
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
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000185 spin_lock(&ino->i_lock);
186 if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
Trond Myklebust49a85062012-09-18 20:43:31 -0400187 pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
Christoph Hellwigc88953d2014-09-10 08:23:31 -0700188 &args->cbl_range)) {
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000189 rv = NFS4ERR_DELAY;
Christoph Hellwigc88953d2014-09-10 08:23:31 -0700190 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 }
197unlock:
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000198 spin_unlock(&ino->i_lock);
199 pnfs_free_lseg_list(&free_me_list);
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400200 pnfs_put_layout_hdr(lo);
Trond Myklebust249b2ee2015-08-20 20:43:14 -0500201 trace_nfs4_cb_layoutrecall_inode(clp, &args->cbl_fh, ino, -rv);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000202 iput(ino);
Trond Myklebust27999f22014-02-12 08:12:42 -0500203out:
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000204 return rv;
205}
206
207static u32 initiate_bulk_draining(struct nfs_client *clp,
208 struct cb_layoutrecallargs *args)
209{
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500210 int stat;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000211
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500212 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;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000219}
220
221static u32 do_callback_layoutrecall(struct nfs_client *clp,
222 struct cb_layoutrecallargs *args)
223{
Trond Myklebust0cb32842012-03-01 11:17:50 -0500224 u32 res;
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000225
226 dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000227 if (args->cbl_recall_type == RETURN_FILE)
228 res = initiate_file_draining(clp, args);
229 else
230 res = initiate_bulk_draining(clp, args);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000231 dprintk("%s returning %i\n", __func__, res);
232 return res;
233
234}
235
Fred Isamanf2a62562011-01-06 11:36:29 +0000236__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args,
237 void *dummy, struct cb_process_state *cps)
238{
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000239 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);
Fred Isamanf2a62562011-01-06 11:36:29 +0000250}
251
Alexandros Batsakis36840372011-01-06 11:36:31 +0000252static 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
Marc Eshel1be56832011-05-22 19:47:09 +0300263__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:
Benny Halevy35c8bb52011-05-24 18:04:02 +0300297 nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
Marc Eshel1be56832011-05-22 19:47:09 +0300298 }
299
300out:
301 kfree(args->devs);
302 dprintk("%s: exit with status = %u\n",
303 __func__, be32_to_cpu(res));
304 return res;
305}
306
Ricardo Labiaga963891a2009-04-01 09:23:34 -0400307/*
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400308 * 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 *
Andy Adamson49110962010-01-14 17:45:08 -0500312 * 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
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400314 * 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 */
Andy Adamson9733f0d2010-01-22 12:03:08 -0500320static __be32
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500321validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400322{
323 struct nfs4_slot *slot;
324
Chuck Levere8d92382013-08-09 12:47:51 -0400325 dprintk("%s enter. slotid %u seqid %u\n",
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500326 __func__, args->csa_slotid, args->csa_sequenceid);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400327
Andy Adamson61f2e512011-11-09 13:58:20 -0500328 if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS)
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400329 return htonl(NFS4ERR_BADSLOT);
330
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500331 slot = tbl->slots + args->csa_slotid;
Chuck Levere8d92382013-08-09 12:47:51 -0400332 dprintk("%s slot table seqid: %u\n", __func__, slot->seq_nr);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400333
334 /* Normal */
Kinglong Meee937ee72015-06-02 18:58:46 +0800335 if (likely(args->csa_sequenceid == slot->seq_nr + 1))
Trond Myklebust55a67392011-08-02 14:46:29 -0400336 goto out_ok;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400337
338 /* Replay */
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500339 if (args->csa_sequenceid == slot->seq_nr) {
Chuck Levere8d92382013-08-09 12:47:51 -0400340 dprintk("%s seqid %u is a replay\n",
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500341 __func__, args->csa_sequenceid);
Andy Adamson49110962010-01-14 17:45:08 -0500342 /* 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);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400349 }
350
351 /* Wraparound */
Andy Adamsonb2f28bd2010-01-14 17:45:07 -0500352 if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) {
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400353 slot->seq_nr = 1;
Trond Myklebust55a67392011-08-02 14:46:29 -0400354 goto out_ok;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400355 }
356
357 /* Misordered request */
358 return htonl(NFS4ERR_SEQ_MISORDERED);
Trond Myklebust55a67392011-08-02 14:46:29 -0400359out_ok:
360 tbl->highest_used_slotid = args->csa_slotid;
361 return htonl(NFS4_OK);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400362}
363
364/*
Mike Sagera7989c32010-01-19 12:54:40 -0500365 * 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 */
369static 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
415out:
416 return status;
417}
418
Andy Adamson9733f0d2010-01-22 12:03:08 -0500419__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
Andy Adamsonc36fca52011-01-06 02:04:32 +0000420 struct cb_sequenceres *res,
421 struct cb_process_state *cps)
Benny Halevyd49433e2009-04-01 09:23:25 -0400422{
Trond Myklebust55a67392011-08-02 14:46:29 -0400423 struct nfs4_slot_table *tbl;
Kinglong Meee937ee72015-06-02 18:58:46 +0800424 struct nfs4_slot *slot;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400425 struct nfs_client *clp;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500426 int i;
Andy Adamson778be232011-01-25 15:38:01 +0000427 __be32 status = htonl(NFS4ERR_BADSESSION);
Benny Halevyd49433e2009-04-01 09:23:25 -0400428
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400429 clp = nfs4_find_client_sessionid(cps->net, args->csa_addr,
430 &args->csa_sessionid, cps->minorversion);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400431 if (clp == NULL)
432 goto out;
433
Trond Myklebustb1c0df52015-02-18 11:34:58 -0800434 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
435 goto out;
Kinglong Meee937ee72015-06-02 18:58:46 +0800436
Trond Myklebust55a67392011-08-02 14:46:29 -0400437 tbl = &clp->cl_session->bc_slot_table;
Kinglong Meee937ee72015-06-02 18:58:46 +0800438 slot = tbl->slots + args->csa_slotid;
Trond Myklebust55a67392011-08-02 14:46:29 -0400439
440 spin_lock(&tbl->slot_tbl_lock);
Andy Adamson42acd022011-01-06 02:04:34 +0000441 /* state manager is resetting the session */
Andy Adamson774d5f12013-05-20 14:13:50 -0400442 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
Trond Myklebust55a67392011-08-02 14:46:29 -0400443 status = htonl(NFS4ERR_DELAY);
Trond Myklebust910ac682011-08-02 14:46:52 -0400444 /* 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);
Trond Myklebust4e54ab82015-06-11 21:13:58 -0400449 goto out_unlock;
Andy Adamson42acd022011-01-06 02:04:34 +0000450 }
451
Kinglong Mee0579c8d2015-06-02 18:59:01 +0800452 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
Kinglong Meee937ee72015-06-02 18:58:46 +0800459 status = validate_seqid(tbl, args);
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400460 if (status)
Trond Myklebust4e54ab82015-06-11 21:13:58 -0400461 goto out_unlock;
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400462
Trond Myklebust55a67392011-08-02 14:46:29 -0400463 cps->slotid = args->csa_slotid;
464
Mike Sager72ce2b32010-01-19 12:54:41 -0500465 /*
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);
Trond Myklebust4e54ab82015-06-11 21:13:58 -0400472 goto out_unlock;
Mike Sager72ce2b32010-01-19 12:54:41 -0500473 }
474
Kinglong Meee937ee72015-06-02 18:58:46 +0800475 /*
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++;
Trond Myklebust4e54ab82015-06-11 21:13:58 -0400481out_unlock:
482 spin_unlock(&tbl->slot_tbl_lock);
Kinglong Meee937ee72015-06-02 18:58:46 +0800483
Ricardo Labiaga68f3f902009-04-01 09:23:35 -0400484out:
Andy Adamson2c4cdf82011-01-25 15:38:02 +0000485 cps->clp = clp; /* put in nfs4_callback_compound */
Mike Sager72ce2b32010-01-19 12:54:41 -0500486 for (i = 0; i < args->csa_nrclists; i++)
487 kfree(args->csa_rclists[i].rcl_refcalls);
488 kfree(args->csa_rclists);
489
Andy Adamsonc36fca52011-01-06 02:04:32 +0000490 if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
491 cps->drc_status = status;
492 status = 0;
493 } else
Andy Adamson49110962010-01-14 17:45:08 -0500494 res->csr_status = status;
Andy Adamsonc36fca52011-01-06 02:04:32 +0000495
Trond Myklebust2f92ae32013-08-14 17:58:28 -0400496 trace_nfs4_cb_sequence(args, res, status);
Andy Adamson49110962010-01-14 17:45:08 -0500497 dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
498 ntohl(status), ntohl(res->csr_status));
499 return status;
Benny Halevyd49433e2009-04-01 09:23:25 -0400500}
501
Alexandros Batsakis36840372011-01-06 11:36:31 +0000502static bool
503validate_bitmap_values(unsigned long mask)
504{
505 return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
506}
507
Andy Adamsonc36fca52011-01-06 02:04:32 +0000508__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
509 struct cb_process_state *cps)
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500510{
Andy Adamson9733f0d2010-01-22 12:03:08 -0500511 __be32 status;
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500512 fmode_t flags = 0;
513
Alexandros Batsakis36840372011-01-06 11:36:31 +0000514 status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000515 if (!cps->clp) /* set in cb_sequence */
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500516 goto out;
517
Trond Myklebust2446ab62012-03-01 17:00:56 -0500518 dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +0000519 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500520
Alexandros Batsakis36840372011-01-06 11:36:31 +0000521 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);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500526 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;
Alexandros Batsakis36840372011-01-06 11:36:31 +0000532 if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *)
533 &args->craa_type_mask))
534 pnfs_recall_all_layouts(cps->clp);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500535 if (flags)
Trond Myklebust826e0012013-04-03 19:27:52 -0400536 nfs_expire_unused_delegation_types(cps->clp, flags);
Alexandros Batsakis31f09602009-12-05 13:27:02 -0500537out:
538 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
539 return status;
540}
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500541
542/* Reduce the fore channel's max_slots to the target value */
Andy Adamsonc36fca52011-01-06 02:04:32 +0000543__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
544 struct cb_process_state *cps)
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500545{
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500546 struct nfs4_slot_table *fc_tbl;
Andy Adamson9733f0d2010-01-22 12:03:08 -0500547 __be32 status;
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500548
549 status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000550 if (!cps->clp) /* set in cb_sequence */
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500551 goto out;
552
Chuck Levere8d92382013-08-09 12:47:51 -0400553 dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n",
Andy Adamsonc36fca52011-01-06 02:04:32 +0000554 rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
Trond Myklebustd5fb4ce2012-11-20 20:24:02 -0500555 args->crsa_target_highest_slotid);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500556
Andy Adamsonc36fca52011-01-06 02:04:32 +0000557 fc_tbl = &cps->clp->cl_session->fc_slot_table;
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500558
Andy Adamsonbae0ac02010-01-21 14:19:16 -0500559 status = htonl(NFS4_OK);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500560
Trond Myklebustd5fb4ce2012-11-20 20:24:02 -0500561 nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid);
Anna Schumaker3f10a6a2015-07-13 14:01:31 -0400562 nfs41_notify_server(cps->clp);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500563out:
564 dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
565 return status;
566}
Benny Halevyd49433e2009-04-01 09:23:25 -0400567#endif /* CONFIG_NFS_V4_1 */