1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/fid/fid_request.c
38 * Lustre Sequence Manager
40 * Author: Yury Umanets <umka@clusterfs.com>
44 # define EXPORT_SYMTAB
46 #define DEBUG_SUBSYSTEM S_FID
49 # include <libcfs/libcfs.h>
50 # include <linux/module.h>
51 #else /* __KERNEL__ */
52 # include <liblustre.h>
56 #include <obd_class.h>
57 #include <dt_object.h>
58 #include <md_object.h>
59 #include <obd_support.h>
60 #include <lustre_req_layout.h>
61 #include <lustre_fid.h>
63 #include <lustre_mdc.h>
64 #include "fid_internal.h"
66 static int seq_client_rpc(struct lu_client_seq *seq, struct lu_seq_range *input,
67 struct lu_seq_range *output, __u32 opc,
70 struct obd_export *exp = seq->lcs_exp;
71 struct ptlrpc_request *req;
72 struct lu_seq_range *out, *in;
77 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_SEQ_QUERY,
78 LUSTRE_MDS_VERSION, SEQ_QUERY);
82 /* Init operation code */
83 op = req_capsule_client_get(&req->rq_pill, &RMF_SEQ_OPC);
86 /* Zero out input range, this is not recovery yet. */
87 in = req_capsule_client_get(&req->rq_pill, &RMF_SEQ_RANGE);
93 ptlrpc_request_set_replen(req);
95 if (seq->lcs_type == LUSTRE_SEQ_METADATA) {
96 req->rq_request_portal = (opc == SEQ_ALLOC_SUPER) ?
97 SEQ_CONTROLLER_PORTAL : SEQ_METADATA_PORTAL;
98 /* update mdt field of *in, it is required for fld update
99 * on super sequence allocator node. */
100 if (opc == SEQ_ALLOC_SUPER)
101 in->lsr_mdt = seq->lcs_space.lsr_mdt;
103 LASSERT(opc == SEQ_ALLOC_META);
104 req->rq_request_portal = SEQ_DATA_PORTAL;
106 ptlrpc_at_set_req_timeout(req);
108 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
109 rc = ptlrpc_queue_wait(req);
110 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
115 out = req_capsule_server_get(&req->rq_pill, &RMF_SEQ_RANGE);
118 if (!range_is_sane(output)) {
119 CERROR("%s: Invalid range received from server: "
120 DRANGE"\n", seq->lcs_name, PRANGE(output));
121 GOTO(out_req, rc = -EINVAL);
124 if (range_is_exhausted(output)) {
125 CERROR("%s: Range received from server is exhausted: "
126 DRANGE"]\n", seq->lcs_name, PRANGE(output));
127 GOTO(out_req, rc = -EINVAL);
131 CDEBUG(D_INFO, "%s: Allocated %s-sequence "DRANGE"]\n",
132 seq->lcs_name, opcname, PRANGE(output));
136 ptlrpc_req_finished(req);
140 /* Request sequence-controller node to allocate new super-sequence. */
141 int seq_client_replay_super(struct lu_client_seq *seq,
142 struct lu_seq_range *range,
143 const struct lu_env *env)
148 cfs_down(&seq->lcs_sem);
152 LASSERT(env != NULL);
153 rc = seq_server_alloc_super(seq->lcs_srv, range,
154 &seq->lcs_space, env);
157 rc = seq_client_rpc(seq, range, &seq->lcs_space,
158 SEQ_ALLOC_SUPER, "super");
162 cfs_up(&seq->lcs_sem);
166 /* Request sequence-controller node to allocate new super-sequence. */
167 int seq_client_alloc_super(struct lu_client_seq *seq,
168 const struct lu_env *env)
171 RETURN(seq_client_replay_super(seq, NULL, env));
174 /* Request sequence-controller node to allocate new meta-sequence. */
175 static int seq_client_alloc_meta(struct lu_client_seq *seq,
176 const struct lu_env *env)
183 LASSERT(env != NULL);
184 rc = seq_server_alloc_meta(seq->lcs_srv, NULL,
185 &seq->lcs_space, env);
188 rc = seq_client_rpc(seq, NULL, &seq->lcs_space,
189 SEQ_ALLOC_META, "meta");
196 /* Allocate new sequence for client. */
197 static int seq_client_alloc_seq(struct lu_client_seq *seq, seqno_t *seqnr)
202 LASSERT(range_is_sane(&seq->lcs_space));
204 if (range_is_exhausted(&seq->lcs_space)) {
205 rc = seq_client_alloc_meta(seq, NULL);
207 CERROR("%s: Can't allocate new meta-sequence, "
208 "rc %d\n", seq->lcs_name, rc);
211 CDEBUG(D_INFO, "%s: New range - "DRANGE"\n",
212 seq->lcs_name, PRANGE(&seq->lcs_space));
218 LASSERT(!range_is_exhausted(&seq->lcs_space));
219 *seqnr = seq->lcs_space.lsr_start;
220 seq->lcs_space.lsr_start += 1;
222 CDEBUG(D_INFO, "%s: Allocated sequence ["LPX64"]\n", seq->lcs_name,
228 /* Allocate new fid on passed client @seq and save it to @fid. */
229 int seq_client_alloc_fid(struct lu_client_seq *seq, struct lu_fid *fid)
234 LASSERT(seq != NULL);
235 LASSERT(fid != NULL);
237 cfs_down(&seq->lcs_sem);
239 if (fid_is_zero(&seq->lcs_fid) ||
240 fid_oid(&seq->lcs_fid) >= seq->lcs_width)
244 rc = seq_client_alloc_seq(seq, &seqnr);
246 CERROR("%s: Can't allocate new sequence, "
247 "rc %d\n", seq->lcs_name, rc);
248 cfs_up(&seq->lcs_sem);
252 CDEBUG(D_INFO, "%s: Switch to sequence "
253 "[0x%16.16"LPF64"x]\n", seq->lcs_name, seqnr);
255 seq->lcs_fid.f_oid = LUSTRE_FID_INIT_OID;
256 seq->lcs_fid.f_seq = seqnr;
257 seq->lcs_fid.f_ver = 0;
260 * Inform caller that sequence switch is performed to allow it
261 * to setup FLD for it.
265 /* Just bump last allocated fid and return to caller. */
266 seq->lcs_fid.f_oid += 1;
271 cfs_up(&seq->lcs_sem);
273 CDEBUG(D_INFO, "%s: Allocated FID "DFID"\n", seq->lcs_name, PFID(fid));
276 EXPORT_SYMBOL(seq_client_alloc_fid);
279 * Finish the current sequence due to disconnect.
280 * See mdc_import_event()
282 void seq_client_flush(struct lu_client_seq *seq)
284 LASSERT(seq != NULL);
285 cfs_down(&seq->lcs_sem);
286 fid_zero(&seq->lcs_fid);
288 * this id shld not be used for seq range allocation.
289 * set to -1 for dgb check.
292 seq->lcs_space.lsr_mdt = -1;
294 range_init(&seq->lcs_space);
295 cfs_up(&seq->lcs_sem);
297 EXPORT_SYMBOL(seq_client_flush);
299 static void seq_client_proc_fini(struct lu_client_seq *seq);
302 static int seq_client_proc_init(struct lu_client_seq *seq)
307 seq->lcs_proc_dir = lprocfs_register(seq->lcs_name,
311 if (IS_ERR(seq->lcs_proc_dir)) {
312 CERROR("%s: LProcFS failed in seq-init\n",
314 rc = PTR_ERR(seq->lcs_proc_dir);
318 rc = lprocfs_add_vars(seq->lcs_proc_dir,
319 seq_client_proc_list, seq);
321 CERROR("%s: Can't init sequence manager "
322 "proc, rc %d\n", seq->lcs_name, rc);
323 GOTO(out_cleanup, rc);
329 seq_client_proc_fini(seq);
333 static void seq_client_proc_fini(struct lu_client_seq *seq)
336 if (seq->lcs_proc_dir) {
337 if (!IS_ERR(seq->lcs_proc_dir))
338 lprocfs_remove(&seq->lcs_proc_dir);
339 seq->lcs_proc_dir = NULL;
344 static int seq_client_proc_init(struct lu_client_seq *seq)
349 static void seq_client_proc_fini(struct lu_client_seq *seq)
355 int seq_client_init(struct lu_client_seq *seq,
356 struct obd_export *exp,
357 enum lu_cli_type type,
359 struct lu_server_seq *srv)
364 LASSERT(seq != NULL);
365 LASSERT(prefix != NULL);
369 seq->lcs_type = type;
370 cfs_sema_init(&seq->lcs_sem, 1);
371 seq->lcs_width = LUSTRE_SEQ_MAX_WIDTH;
373 /* Make sure that things are clear before work is started. */
374 seq_client_flush(seq);
377 LASSERT(seq->lcs_srv != NULL);
379 LASSERT(seq->lcs_exp != NULL);
380 seq->lcs_exp = class_export_get(seq->lcs_exp);
383 snprintf(seq->lcs_name, sizeof(seq->lcs_name),
386 rc = seq_client_proc_init(seq);
388 seq_client_fini(seq);
391 EXPORT_SYMBOL(seq_client_init);
393 void seq_client_fini(struct lu_client_seq *seq)
397 seq_client_proc_fini(seq);
399 if (seq->lcs_exp != NULL) {
400 class_export_put(seq->lcs_exp);
407 EXPORT_SYMBOL(seq_client_fini);