1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
5 * Author Peter Braam <braam@clusterfs.com>
7 * This file is part of the Lustre file system, http://www.lustre.org
8 * Lustre is a trademark of Cluster File Systems, Inc.
10 * You may have signed or agreed to another license before downloading
11 * this software. If so, you are bound by the terms and conditions
12 * of that agreement, and the following does not apply to you. See the
13 * LICENSE file included with this distribution for more information.
15 * If you did not agree to a different license, then this copy of Lustre
16 * is open source software; you can redistribute it and/or modify it
17 * under the terms of version 2 of the GNU General Public License as
18 * published by the Free Software Foundation.
20 * In either case, Lustre is distributed in the hope that it will be
21 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
22 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * license text for more details.
25 * For testing and management it is treated as an obd_device,
26 * although * it does not export a full OBD method table (the
27 * requests are coming * in over the wire, so object target modules
28 * do not have a full * method table.)
33 # define EXPORT_SYMTAB
35 #define DEBUG_SUBSYSTEM S_OSC
38 # include <libcfs/libcfs.h>
39 #else /* __KERNEL__ */
40 # include <liblustre.h>
47 # include <lustre_dlm.h>
48 #include <obd_class.h>
49 #include "osc_internal.h"
51 static int osc_interpret_create(struct ptlrpc_request *req, void *data, int rc)
53 struct osc_creator *oscc;
54 struct ost_body *body = NULL;
58 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
59 lustre_swab_ost_body);
60 if (body == NULL && rc == 0)
64 oscc = req->rq_async_args.pointer_arg[0];
65 LASSERT(oscc && (oscc->oscc_obd != LP_POISON));
67 spin_lock(&oscc->oscc_lock);
68 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
72 int diff = body->oa.o_id - oscc->oscc_last_id;
74 if (diff < oscc->oscc_grow_count)
75 oscc->oscc_grow_count =
76 max(diff/3, OST_MIN_PRECREATE);
78 oscc->oscc_flags &= ~OSCC_FLAG_LOW;
79 oscc->oscc_last_id = body->oa.o_id;
81 spin_unlock(&oscc->oscc_lock);
85 /* valid race delorphan vs create, or somthing after resend */
86 spin_unlock(&oscc->oscc_lock);
87 DEBUG_REQ(D_INODE, req, "Got EGAIN - resend \n");
92 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
93 if (body && rc == -ENOSPC) {
94 oscc->oscc_grow_count = OST_MIN_PRECREATE;
95 oscc->oscc_last_id = body->oa.o_id;
97 spin_unlock(&oscc->oscc_lock);
98 DEBUG_REQ(D_INODE, req, "OST out of space, flagging");
102 /* filter always set body->oa.o_id as the last_id
103 * of filter (see filter_handle_precreate for detail)*/
104 if (body && body->oa.o_id > oscc->oscc_last_id)
105 oscc->oscc_last_id = body->oa.o_id;
106 spin_unlock(&oscc->oscc_lock);
110 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
111 oscc->oscc_grow_count = OST_MIN_PRECREATE;
112 spin_unlock(&oscc->oscc_lock);
113 DEBUG_REQ(D_ERROR, req,
114 "Unknown rc %d from async create: failing oscc", rc);
115 ptlrpc_fail_import(req->rq_import,
116 lustre_msg_get_conn_cnt(req->rq_reqmsg));
120 CDEBUG(D_HA, "preallocated through id "LPU64" (next to use "LPU64")\n",
121 oscc->oscc_last_id, oscc->oscc_next_id);
123 cfs_waitq_signal(&oscc->oscc_waitq);
127 static int oscc_internal_create(struct osc_creator *oscc)
129 struct ptlrpc_request *request;
130 struct ost_body *body;
131 int size[] = { sizeof(struct ptlrpc_body), sizeof(*body) };
134 LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
136 if (oscc->oscc_flags & OSCC_FLAG_CREATING ||
137 oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
138 spin_unlock(&oscc->oscc_lock);
142 if (oscc->oscc_grow_count < OST_MAX_PRECREATE &&
143 ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
144 (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
145 (oscc->oscc_grow_count / 4 + 1)) {
146 oscc->oscc_flags |= OSCC_FLAG_LOW;
147 oscc->oscc_grow_count *= 2;
150 if (oscc->oscc_grow_count > OST_MAX_PRECREATE / 2)
151 oscc->oscc_grow_count = OST_MAX_PRECREATE / 2;
153 oscc->oscc_flags |= OSCC_FLAG_CREATING;
154 spin_unlock(&oscc->oscc_lock);
156 request = ptlrpc_prep_req(oscc->oscc_obd->u.cli.cl_import,
157 LUSTRE_OST_VERSION, OST_CREATE, 2,
159 if (request == NULL) {
160 spin_lock(&oscc->oscc_lock);
161 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
162 spin_unlock(&oscc->oscc_lock);
166 request->rq_request_portal = OST_CREATE_PORTAL;
167 ptlrpc_at_set_req_timeout(request);
168 body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
170 spin_lock(&oscc->oscc_lock);
171 body->oa.o_id = oscc->oscc_last_id + oscc->oscc_grow_count;
172 body->oa.o_gr = oscc->oscc_oa.o_gr;
173 LASSERT(body->oa.o_gr > 0);
174 body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
175 spin_unlock(&oscc->oscc_lock);
176 CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
177 body->oa.o_id, oscc->oscc_last_id);
179 ptlrpc_req_set_repsize(request, 2, size);
181 request->rq_async_args.pointer_arg[0] = oscc;
182 request->rq_interpret_reply = osc_interpret_create;
183 ptlrpcd_add_req(request);
188 static int oscc_has_objects(struct osc_creator *oscc, int count)
191 spin_lock(&oscc->oscc_lock);
192 have_objs = ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
195 oscc_internal_create(oscc);
197 spin_unlock(&oscc->oscc_lock);
203 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
209 have_objs = oscc_has_objects(oscc, count);
211 spin_lock(&oscc->oscc_lock);
212 ost_full = (oscc->oscc_flags & OSCC_FLAG_NOSPC);
213 spin_unlock(&oscc->oscc_lock);
215 osc_invalid = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
217 return have_objs || ost_full || osc_invalid;
220 static int oscc_precreate(struct osc_creator *oscc, int wait)
222 struct l_wait_info lwi = { 0 };
226 if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
232 /* no rc check -- a no-INTR, no-TIMEOUT wait can't fail */
233 l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
235 if (!oscc_has_objects(oscc, 1) && (oscc->oscc_flags & OSCC_FLAG_NOSPC))
238 if (oscc->oscc_obd->u.cli.cl_import->imp_invalid)
244 int oscc_recovering(struct osc_creator *oscc)
248 spin_lock(&oscc->oscc_lock);
249 recov = oscc->oscc_flags & OSCC_FLAG_RECOVERING;
250 spin_unlock(&oscc->oscc_lock);
255 /* decide if the OST has remaining object, return value :
256 0 : the OST has remaining object, and don't need to do precreate.
257 1 : the OST has no remaining object, and will send a RPC for precreate.
258 2 : the OST has no remaining object, and will not get any for
259 a potentially very long time
262 int osc_precreate(struct obd_export *exp)
264 struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
265 struct obd_import *imp = exp->exp_imp_reverse;
268 LASSERT(oscc != NULL);
269 if (imp != NULL && imp->imp_deactive)
272 if (oscc->oscc_last_id < oscc->oscc_next_id) {
273 spin_lock(&oscc->oscc_lock);
274 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
275 spin_unlock(&oscc->oscc_lock);
278 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
279 spin_unlock(&oscc->oscc_lock);
282 if (oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
283 spin_unlock(&oscc->oscc_lock);
287 if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
288 spin_unlock(&oscc->oscc_lock);
292 oscc_internal_create(oscc);
298 int osc_create(struct obd_export *exp, struct obdo *oa,
299 struct lov_stripe_md **ea, struct obd_trans_info *oti)
301 struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
302 struct lov_stripe_md *lsm;
303 int try_again = 1, rc = 0;
308 LASSERT(oa->o_gr > 0);
309 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
311 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
312 oa->o_flags == OBD_FL_RECREATE_OBJS) {
313 RETURN(osc_real_create(exp, oa, ea, oti));
316 if (oa->o_gr == FILTER_GROUP_LLOG || oa->o_gr == FILTER_GROUP_ECHO)
317 RETURN(osc_real_create(exp, oa, ea, oti));
319 /* this is the special case where create removes orphans */
320 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
321 oa->o_flags == OBD_FL_DELORPHAN) {
322 spin_lock(&oscc->oscc_lock);
323 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
324 spin_unlock(&oscc->oscc_lock);
327 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
328 spin_unlock(&oscc->oscc_lock);
331 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
332 /* seting flag LOW we prevent extra grow precreate size
333 * and enforce use last assigned size */
334 oscc->oscc_flags |= OSCC_FLAG_LOW;
335 spin_unlock(&oscc->oscc_lock);
336 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
337 oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
339 /* delete from next_id on up */
340 oa->o_valid |= OBD_MD_FLID;
341 oa->o_id = oscc->oscc_next_id - 1;
343 rc = osc_real_create(exp, oa, ea, NULL);
345 spin_lock(&oscc->oscc_lock);
346 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
347 if (rc == 0 || rc == -ENOSPC) {
349 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
350 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
351 oscc->oscc_last_id = oa->o_id;
352 CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
353 LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
354 oscc->oscc_last_id, rc);
355 cfs_waitq_signal(&oscc->oscc_waitq);
357 CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
358 oscc->oscc_obd->obd_name, rc);
360 spin_unlock(&oscc->oscc_lock);
368 rc = obd_alloc_memmd(exp, &lsm);
374 /* If orphans are being recovered, then we must wait until
375 it is finished before we can continue with create. */
376 if (oscc_recovering(oscc)) {
377 struct l_wait_info lwi;
379 CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
380 oscc->oscc_obd->obd_name);
382 lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(
383 obd_timeout / 4)), NULL, NULL);
384 rc = l_wait_event(oscc->oscc_waitq,
385 !oscc_recovering(oscc), &lwi);
386 LASSERT(rc == 0 || rc == -ETIMEDOUT);
387 if (rc == -ETIMEDOUT) {
388 CDEBUG(D_HA,"%s: timeout waiting on recovery\n",
389 oscc->oscc_obd->obd_name);
392 CDEBUG(D_HA, "%s: oscc recovery over, waking up\n",
393 oscc->oscc_obd->obd_name);
396 spin_lock(&oscc->oscc_lock);
397 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
398 spin_unlock(&oscc->oscc_lock);
402 if (oscc->oscc_last_id >= oscc->oscc_next_id) {
403 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
404 oa->o_id = oscc->oscc_next_id;
405 lsm->lsm_object_id = oscc->oscc_next_id;
407 oscc->oscc_next_id++;
410 CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
411 exp->exp_obd->obd_name, oscc->oscc_next_id);
412 } else if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
414 spin_unlock(&oscc->oscc_lock);
417 spin_unlock(&oscc->oscc_lock);
418 rc = oscc_precreate(oscc, try_again);
424 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
425 obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
426 else if (*ea == NULL)
427 obd_free_memmd(exp, &lsm);
431 void oscc_init(struct obd_device *obd)
433 struct osc_creator *oscc;
438 oscc = &obd->u.cli.cl_oscc;
440 memset(oscc, 0, sizeof(*oscc));
441 CFS_INIT_LIST_HEAD(&oscc->oscc_list);
442 cfs_waitq_init(&oscc->oscc_waitq);
443 spin_lock_init(&oscc->oscc_lock);
444 oscc->oscc_obd = obd;
445 oscc->oscc_grow_count = OST_MIN_PRECREATE;
447 oscc->oscc_next_id = 2;
448 oscc->oscc_last_id = 1;
449 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
450 /* XXX the export handle should give the oscc the last object */
451 /* oed->oed_oscc.oscc_last_id = exph->....; */