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 (c) 2007, 2010, Oracle and/or its affiliates. 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,
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);
90 ptlrpc_request_set_replen(req);
92 if (seq->lcs_type == LUSTRE_SEQ_METADATA) {
93 req->rq_request_portal = SEQ_METADATA_PORTAL;
94 in->lsr_flags = LU_SEQ_RANGE_MDT;
96 LASSERTF(seq->lcs_type == LUSTRE_SEQ_DATA,
97 "unknown lcs_type %u\n", seq->lcs_type);
98 req->rq_request_portal = SEQ_DATA_PORTAL;
99 in->lsr_flags = LU_SEQ_RANGE_OST;
102 if (opc == SEQ_ALLOC_SUPER) {
103 /* Update index field of *in, it is required for
104 * FLD update on super sequence allocator node. */
105 in->lsr_index = seq->lcs_space.lsr_index;
106 req->rq_request_portal = SEQ_CONTROLLER_PORTAL;
108 LASSERTF(opc == SEQ_ALLOC_META,
109 "unknown opcode %u\n, opc", opc);
112 ptlrpc_at_set_req_timeout(req);
114 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
115 rc = ptlrpc_queue_wait(req);
116 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
121 out = req_capsule_server_get(&req->rq_pill, &RMF_SEQ_RANGE);
124 if (!range_is_sane(output)) {
125 CERROR("%s: Invalid range received from server: "
126 DRANGE"\n", seq->lcs_name, PRANGE(output));
127 GOTO(out_req, rc = -EINVAL);
130 if (range_is_exhausted(output)) {
131 CERROR("%s: Range received from server is exhausted: "
132 DRANGE"]\n", seq->lcs_name, PRANGE(output));
133 GOTO(out_req, rc = -EINVAL);
136 CDEBUG(D_INFO, "%s: Allocated %s-sequence "DRANGE"]\n",
137 seq->lcs_name, opcname, PRANGE(output));
141 ptlrpc_req_finished(req);
145 /* Request sequence-controller node to allocate new super-sequence. */
146 int seq_client_alloc_super(struct lu_client_seq *seq,
147 const struct lu_env *env)
152 cfs_down(&seq->lcs_sem);
156 LASSERT(env != NULL);
157 rc = seq_server_alloc_super(seq->lcs_srv, &seq->lcs_space,
161 rc = seq_client_rpc(seq, &seq->lcs_space,
162 SEQ_ALLOC_SUPER, "super");
166 cfs_up(&seq->lcs_sem);
170 /* Request sequence-controller node to allocate new meta-sequence. */
171 static int seq_client_alloc_meta(struct lu_client_seq *seq,
172 const struct lu_env *env)
179 LASSERT(env != NULL);
180 rc = seq_server_alloc_meta(seq->lcs_srv, &seq->lcs_space, env);
183 rc = seq_client_rpc(seq, &seq->lcs_space,
184 SEQ_ALLOC_META, "meta");
191 /* Allocate new sequence for client. */
192 static int seq_client_alloc_seq(struct lu_client_seq *seq, seqno_t *seqnr)
197 LASSERT(range_is_sane(&seq->lcs_space));
199 if (range_is_exhausted(&seq->lcs_space)) {
200 rc = seq_client_alloc_meta(seq, NULL);
202 CERROR("%s: Can't allocate new meta-sequence, "
203 "rc %d\n", seq->lcs_name, rc);
206 CDEBUG(D_INFO, "%s: New range - "DRANGE"\n",
207 seq->lcs_name, PRANGE(&seq->lcs_space));
213 LASSERT(!range_is_exhausted(&seq->lcs_space));
214 *seqnr = seq->lcs_space.lsr_start;
215 seq->lcs_space.lsr_start += 1;
217 CDEBUG(D_INFO, "%s: Allocated sequence ["LPX64"]\n", seq->lcs_name,
223 static int seq_fid_alloc_prep(struct lu_client_seq *seq,
224 cfs_waitlink_t *link)
226 if (seq->lcs_update) {
227 cfs_waitq_add(&seq->lcs_waitq, link);
228 cfs_set_current_state(CFS_TASK_UNINT);
229 cfs_up(&seq->lcs_sem);
231 cfs_waitq_wait(link, CFS_TASK_UNINT);
233 cfs_down(&seq->lcs_sem);
234 cfs_waitq_del(&seq->lcs_waitq, link);
235 cfs_set_current_state(CFS_TASK_RUNNING);
239 cfs_up(&seq->lcs_sem);
243 static void seq_fid_alloc_fini(struct lu_client_seq *seq)
245 LASSERT(seq->lcs_update == 1);
246 cfs_down(&seq->lcs_sem);
248 cfs_waitq_signal(&seq->lcs_waitq);
251 /* Allocate new fid on passed client @seq and save it to @fid. */
252 int seq_client_alloc_fid(struct lu_client_seq *seq, struct lu_fid *fid)
258 LASSERT(seq != NULL);
259 LASSERT(fid != NULL);
261 cfs_waitlink_init(&link);
262 cfs_down(&seq->lcs_sem);
267 if (!fid_is_zero(&seq->lcs_fid) &&
268 fid_oid(&seq->lcs_fid) < seq->lcs_width) {
269 /* Just bump last allocated fid and return to caller. */
270 seq->lcs_fid.f_oid += 1;
275 rc = seq_fid_alloc_prep(seq, &link);
279 rc = seq_client_alloc_seq(seq, &seqnr);
281 CERROR("%s: Can't allocate new sequence, "
282 "rc %d\n", seq->lcs_name, rc);
283 seq_fid_alloc_fini(seq);
284 cfs_up(&seq->lcs_sem);
288 CDEBUG(D_INFO, "%s: Switch to sequence "
289 "[0x%16.16"LPF64"x]\n", seq->lcs_name, seqnr);
291 seq->lcs_fid.f_oid = LUSTRE_FID_INIT_OID;
292 seq->lcs_fid.f_seq = seqnr;
293 seq->lcs_fid.f_ver = 0;
296 * Inform caller that sequence switch is performed to allow it
297 * to setup FLD for it.
301 seq_fid_alloc_fini(seq);
306 cfs_up(&seq->lcs_sem);
308 CDEBUG(D_INFO, "%s: Allocated FID "DFID"\n", seq->lcs_name, PFID(fid));
311 EXPORT_SYMBOL(seq_client_alloc_fid);
314 * Finish the current sequence due to disconnect.
315 * See mdc_import_event()
317 void seq_client_flush(struct lu_client_seq *seq)
321 LASSERT(seq != NULL);
322 cfs_waitlink_init(&link);
323 cfs_down(&seq->lcs_sem);
325 while (seq->lcs_update) {
326 cfs_waitq_add(&seq->lcs_waitq, &link);
327 cfs_set_current_state(CFS_TASK_UNINT);
328 cfs_up(&seq->lcs_sem);
330 cfs_waitq_wait(&link, CFS_TASK_UNINT);
332 cfs_down(&seq->lcs_sem);
333 cfs_waitq_del(&seq->lcs_waitq, &link);
334 cfs_set_current_state(CFS_TASK_RUNNING);
337 fid_zero(&seq->lcs_fid);
339 * this id shld not be used for seq range allocation.
340 * set to -1 for dgb check.
343 seq->lcs_space.lsr_index = -1;
345 range_init(&seq->lcs_space);
346 cfs_up(&seq->lcs_sem);
348 EXPORT_SYMBOL(seq_client_flush);
350 static void seq_client_proc_fini(struct lu_client_seq *seq);
353 static int seq_client_proc_init(struct lu_client_seq *seq)
358 seq->lcs_proc_dir = lprocfs_register(seq->lcs_name,
362 if (IS_ERR(seq->lcs_proc_dir)) {
363 CERROR("%s: LProcFS failed in seq-init\n",
365 rc = PTR_ERR(seq->lcs_proc_dir);
369 rc = lprocfs_add_vars(seq->lcs_proc_dir,
370 seq_client_proc_list, seq);
372 CERROR("%s: Can't init sequence manager "
373 "proc, rc %d\n", seq->lcs_name, rc);
374 GOTO(out_cleanup, rc);
380 seq_client_proc_fini(seq);
384 static void seq_client_proc_fini(struct lu_client_seq *seq)
387 if (seq->lcs_proc_dir) {
388 if (!IS_ERR(seq->lcs_proc_dir))
389 lprocfs_remove(&seq->lcs_proc_dir);
390 seq->lcs_proc_dir = NULL;
395 static int seq_client_proc_init(struct lu_client_seq *seq)
400 static void seq_client_proc_fini(struct lu_client_seq *seq)
406 int seq_client_init(struct lu_client_seq *seq,
407 struct obd_export *exp,
408 enum lu_cli_type type,
410 struct lu_server_seq *srv)
415 LASSERT(seq != NULL);
416 LASSERT(prefix != NULL);
420 seq->lcs_type = type;
421 cfs_sema_init(&seq->lcs_sem, 1);
422 seq->lcs_width = LUSTRE_SEQ_MAX_WIDTH;
423 cfs_waitq_init(&seq->lcs_waitq);
425 /* Make sure that things are clear before work is started. */
426 seq_client_flush(seq);
429 LASSERT(seq->lcs_srv != NULL);
431 LASSERT(seq->lcs_exp != NULL);
432 seq->lcs_exp = class_export_get(seq->lcs_exp);
435 snprintf(seq->lcs_name, sizeof(seq->lcs_name),
438 rc = seq_client_proc_init(seq);
440 seq_client_fini(seq);
443 EXPORT_SYMBOL(seq_client_init);
445 void seq_client_fini(struct lu_client_seq *seq)
449 seq_client_proc_fini(seq);
451 if (seq->lcs_exp != NULL) {
452 class_export_put(seq->lcs_exp);
459 EXPORT_SYMBOL(seq_client_fini);