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;
74 unsigned int debug_mask;
78 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_SEQ_QUERY,
79 LUSTRE_MDS_VERSION, SEQ_QUERY);
83 /* Init operation code */
84 op = req_capsule_client_get(&req->rq_pill, &RMF_SEQ_OPC);
87 /* Zero out input range, this is not recovery yet. */
88 in = req_capsule_client_get(&req->rq_pill, &RMF_SEQ_RANGE);
91 ptlrpc_request_set_replen(req);
93 if (seq->lcs_type == LUSTRE_SEQ_METADATA) {
94 req->rq_request_portal = SEQ_METADATA_PORTAL;
95 in->lsr_flags = LU_SEQ_RANGE_MDT;
97 LASSERTF(seq->lcs_type == LUSTRE_SEQ_DATA,
98 "unknown lcs_type %u\n", seq->lcs_type);
99 req->rq_request_portal = SEQ_DATA_PORTAL;
100 in->lsr_flags = LU_SEQ_RANGE_OST;
103 if (opc == SEQ_ALLOC_SUPER) {
104 /* Update index field of *in, it is required for
105 * FLD update on super sequence allocator node. */
106 in->lsr_index = seq->lcs_space.lsr_index;
107 req->rq_request_portal = SEQ_CONTROLLER_PORTAL;
108 debug_mask = D_CONSOLE;
111 LASSERTF(opc == SEQ_ALLOC_META,
112 "unknown opcode %u\n, opc", opc);
115 ptlrpc_at_set_req_timeout(req);
117 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
118 rc = ptlrpc_queue_wait(req);
119 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
124 out = req_capsule_server_get(&req->rq_pill, &RMF_SEQ_RANGE);
127 if (!range_is_sane(output)) {
128 CERROR("%s: Invalid range received from server: "
129 DRANGE"\n", seq->lcs_name, PRANGE(output));
130 GOTO(out_req, rc = -EINVAL);
133 if (range_is_exhausted(output)) {
134 CERROR("%s: Range received from server is exhausted: "
135 DRANGE"]\n", seq->lcs_name, PRANGE(output));
136 GOTO(out_req, rc = -EINVAL);
139 CDEBUG_LIMIT(debug_mask, "%s: Allocated %s-sequence "DRANGE"]\n",
140 seq->lcs_name, opcname, PRANGE(output));
144 ptlrpc_req_finished(req);
148 /* Request sequence-controller node to allocate new super-sequence. */
149 int seq_client_alloc_super(struct lu_client_seq *seq,
150 const struct lu_env *env)
155 cfs_down(&seq->lcs_sem);
159 LASSERT(env != NULL);
160 rc = seq_server_alloc_super(seq->lcs_srv, &seq->lcs_space,
164 rc = seq_client_rpc(seq, &seq->lcs_space,
165 SEQ_ALLOC_SUPER, "super");
169 cfs_up(&seq->lcs_sem);
173 /* Request sequence-controller node to allocate new meta-sequence. */
174 static int seq_client_alloc_meta(struct lu_client_seq *seq,
175 const struct lu_env *env)
182 LASSERT(env != NULL);
183 rc = seq_server_alloc_meta(seq->lcs_srv, &seq->lcs_space, env);
186 rc = seq_client_rpc(seq, &seq->lcs_space,
187 SEQ_ALLOC_META, "meta");
194 /* Allocate new sequence for client. */
195 static int seq_client_alloc_seq(struct lu_client_seq *seq, seqno_t *seqnr)
200 LASSERT(range_is_sane(&seq->lcs_space));
202 if (range_is_exhausted(&seq->lcs_space)) {
203 rc = seq_client_alloc_meta(seq, NULL);
205 CERROR("%s: Can't allocate new meta-sequence, "
206 "rc %d\n", seq->lcs_name, rc);
209 CDEBUG(D_INFO, "%s: New range - "DRANGE"\n",
210 seq->lcs_name, PRANGE(&seq->lcs_space));
216 LASSERT(!range_is_exhausted(&seq->lcs_space));
217 *seqnr = seq->lcs_space.lsr_start;
218 seq->lcs_space.lsr_start += 1;
220 CDEBUG(D_INFO, "%s: Allocated sequence ["LPX64"]\n", seq->lcs_name,
226 static int seq_fid_alloc_prep(struct lu_client_seq *seq,
227 cfs_waitlink_t *link)
229 if (seq->lcs_update) {
230 cfs_waitq_add(&seq->lcs_waitq, link);
231 cfs_set_current_state(CFS_TASK_UNINT);
232 cfs_up(&seq->lcs_sem);
234 cfs_waitq_wait(link, CFS_TASK_UNINT);
236 cfs_down(&seq->lcs_sem);
237 cfs_waitq_del(&seq->lcs_waitq, link);
238 cfs_set_current_state(CFS_TASK_RUNNING);
242 cfs_up(&seq->lcs_sem);
246 static void seq_fid_alloc_fini(struct lu_client_seq *seq)
248 LASSERT(seq->lcs_update == 1);
249 cfs_down(&seq->lcs_sem);
251 cfs_waitq_signal(&seq->lcs_waitq);
254 /* Allocate new fid on passed client @seq and save it to @fid. */
255 int seq_client_alloc_fid(struct lu_client_seq *seq, struct lu_fid *fid)
261 LASSERT(seq != NULL);
262 LASSERT(fid != NULL);
264 cfs_waitlink_init(&link);
265 cfs_down(&seq->lcs_sem);
270 if (!fid_is_zero(&seq->lcs_fid) &&
271 fid_oid(&seq->lcs_fid) < seq->lcs_width) {
272 /* Just bump last allocated fid and return to caller. */
273 seq->lcs_fid.f_oid += 1;
278 rc = seq_fid_alloc_prep(seq, &link);
282 rc = seq_client_alloc_seq(seq, &seqnr);
284 CERROR("%s: Can't allocate new sequence, "
285 "rc %d\n", seq->lcs_name, rc);
286 seq_fid_alloc_fini(seq);
287 cfs_up(&seq->lcs_sem);
291 CDEBUG(D_INFO, "%s: Switch to sequence "
292 "[0x%16.16"LPF64"x]\n", seq->lcs_name, seqnr);
294 seq->lcs_fid.f_oid = LUSTRE_FID_INIT_OID;
295 seq->lcs_fid.f_seq = seqnr;
296 seq->lcs_fid.f_ver = 0;
299 * Inform caller that sequence switch is performed to allow it
300 * to setup FLD for it.
304 seq_fid_alloc_fini(seq);
309 cfs_up(&seq->lcs_sem);
311 CDEBUG(D_INFO, "%s: Allocated FID "DFID"\n", seq->lcs_name, PFID(fid));
314 EXPORT_SYMBOL(seq_client_alloc_fid);
317 * Finish the current sequence due to disconnect.
318 * See mdc_import_event()
320 void seq_client_flush(struct lu_client_seq *seq)
324 LASSERT(seq != NULL);
325 cfs_waitlink_init(&link);
326 cfs_down(&seq->lcs_sem);
328 while (seq->lcs_update) {
329 cfs_waitq_add(&seq->lcs_waitq, &link);
330 cfs_set_current_state(CFS_TASK_UNINT);
331 cfs_up(&seq->lcs_sem);
333 cfs_waitq_wait(&link, CFS_TASK_UNINT);
335 cfs_down(&seq->lcs_sem);
336 cfs_waitq_del(&seq->lcs_waitq, &link);
337 cfs_set_current_state(CFS_TASK_RUNNING);
340 fid_zero(&seq->lcs_fid);
342 * this id shld not be used for seq range allocation.
343 * set to -1 for dgb check.
346 seq->lcs_space.lsr_index = -1;
348 range_init(&seq->lcs_space);
349 cfs_up(&seq->lcs_sem);
351 EXPORT_SYMBOL(seq_client_flush);
353 static void seq_client_proc_fini(struct lu_client_seq *seq);
356 static int seq_client_proc_init(struct lu_client_seq *seq)
361 seq->lcs_proc_dir = lprocfs_register(seq->lcs_name,
365 if (IS_ERR(seq->lcs_proc_dir)) {
366 CERROR("%s: LProcFS failed in seq-init\n",
368 rc = PTR_ERR(seq->lcs_proc_dir);
372 rc = lprocfs_add_vars(seq->lcs_proc_dir,
373 seq_client_proc_list, seq);
375 CERROR("%s: Can't init sequence manager "
376 "proc, rc %d\n", seq->lcs_name, rc);
377 GOTO(out_cleanup, rc);
383 seq_client_proc_fini(seq);
387 static void seq_client_proc_fini(struct lu_client_seq *seq)
390 if (seq->lcs_proc_dir) {
391 if (!IS_ERR(seq->lcs_proc_dir))
392 lprocfs_remove(&seq->lcs_proc_dir);
393 seq->lcs_proc_dir = NULL;
398 static int seq_client_proc_init(struct lu_client_seq *seq)
403 static void seq_client_proc_fini(struct lu_client_seq *seq)
409 int seq_client_init(struct lu_client_seq *seq,
410 struct obd_export *exp,
411 enum lu_cli_type type,
413 struct lu_server_seq *srv)
418 LASSERT(seq != NULL);
419 LASSERT(prefix != NULL);
423 seq->lcs_type = type;
424 cfs_sema_init(&seq->lcs_sem, 1);
425 seq->lcs_width = LUSTRE_SEQ_MAX_WIDTH;
426 cfs_waitq_init(&seq->lcs_waitq);
428 /* Make sure that things are clear before work is started. */
429 seq_client_flush(seq);
432 LASSERT(seq->lcs_srv != NULL);
434 LASSERT(seq->lcs_exp != NULL);
435 seq->lcs_exp = class_export_get(seq->lcs_exp);
438 snprintf(seq->lcs_name, sizeof(seq->lcs_name),
441 rc = seq_client_proc_init(seq);
443 seq_client_fini(seq);
446 EXPORT_SYMBOL(seq_client_init);
448 void seq_client_fini(struct lu_client_seq *seq)
452 seq_client_proc_fini(seq);
454 if (seq->lcs_exp != NULL) {
455 class_export_put(seq->lcs_exp);
462 EXPORT_SYMBOL(seq_client_fini);