4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2011, 2012, Intel, Inc.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
28 * Author: Niu Yawei <yawei.niu@intel.com>
32 # define EXPORT_SYMTAB
35 #define DEBUG_SUBSYSTEM S_LQUOTA
37 #include <lustre_dlm.h>
38 #include <obd_class.h>
40 #include "qsd_internal.h"
43 * Return qsd_qtype_info structure associated with a global lock
45 * \param lock - is the global lock from which we should extract the qqi
46 * \param reset - whether lock->l_ast_data should be cleared
48 static struct qsd_qtype_info *qsd_glb_ast_data_get(struct ldlm_lock *lock,
50 struct qsd_qtype_info *qqi;
53 lock_res_and_lock(lock);
54 qqi = lock->l_ast_data;
57 lu_ref_add(&qqi->qqi_reference, "ast_data_get", lock);
59 lock->l_ast_data = NULL;
61 unlock_res_and_lock(lock);
63 if (reset && qqi != NULL) {
64 /* release qqi reference hold for the lock */
66 lu_ref_del(&qqi->qqi_reference, "glb_lock", lock);
72 * Return lquota entry structure associated with a per-ID lock
74 * \param lock - is the per-ID lock from which we should extract the lquota
76 * \param reset - whether lock->l_ast_data should be cleared
78 static struct lquota_entry *qsd_id_ast_data_get(struct ldlm_lock *lock,
80 struct lquota_entry *lqe;
83 lock_res_and_lock(lock);
84 lqe = lock->l_ast_data;
88 lock->l_ast_data = NULL;
90 unlock_res_and_lock(lock);
92 if (reset && lqe != NULL)
93 /* release lqe reference hold for the lock */
99 * Glimpse callback handler for all quota locks. This function extracts
100 * information from the glimpse request.
102 * \param lock - is the lock targeted by the glimpse
103 * \param data - is a pointer to the glimpse ptlrpc request
104 * \param req - is the glimpse request
105 * \param desc - is the glimpse descriptor describing the purpose of the glimpse
107 * \param lvb - is the pointer to the lvb in the reply buffer
109 * \retval 0 on success and \desc, \lvb & \arg point to a valid structures,
110 * appropriate error on failure
112 static int qsd_common_glimpse_ast(struct ptlrpc_request *req,
113 struct ldlm_gl_lquota_desc **desc, void **lvb)
118 LASSERT(lustre_msg_get_opc(req->rq_reqmsg) == LDLM_GL_CALLBACK);
120 /* glimpse on quota locks always packs a glimpse descriptor */
121 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_DESC_CALLBACK);
123 /* extract glimpse descriptor */
124 *desc = req_capsule_client_get(&req->rq_pill, &RMF_DLM_GL_DESC);
129 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
130 sizeof(struct lquota_lvb));
131 rc = req_capsule_server_pack(&req->rq_pill);
133 CERROR("Can't pack response, rc %d\n", rc);
138 *lvb = req_capsule_server_get(&req->rq_pill, &RMF_DLM_LVB);
144 * Blocking callback handler for global index lock
146 * \param lock - is the lock for which ast occurred.
147 * \param desc - is the description of a conflicting lock in case of blocking
149 * \param data - is the value of lock->l_ast_data
150 * \param flag - LDLM_CB_BLOCKING or LDLM_CB_CANCELING. Used to distinguish
151 * cancellation and blocking ast's.
153 static int qsd_glb_blocking_ast(struct ldlm_lock *lock,
154 struct ldlm_lock_desc *desc, void *data,
161 case LDLM_CB_BLOCKING: {
162 struct lustre_handle lockh;
164 LDLM_DEBUG(lock, "blocking AST on global quota lock");
165 ldlm_lock2handle(lock, &lockh);
166 rc = ldlm_cli_cancel(&lockh);
169 case LDLM_CB_CANCELING: {
170 struct qsd_qtype_info *qqi;
172 LDLM_DEBUG(lock, "canceling global quota lock");
174 qqi = qsd_glb_ast_data_get(lock, true);
178 /* we are losing the global index lock, so let's mark the
179 * global & slave indexes as not up-to-date any more */
180 write_lock(&qqi->qqi_qsd->qsd_lock);
181 qqi->qqi_glb_uptodate = false;
182 qqi->qqi_slv_uptodate = false;
183 if (lock->l_handle.h_cookie == qqi->qqi_lockh.cookie)
184 memset(&qqi->qqi_lockh, 0, sizeof(qqi->qqi_lockh));
185 write_unlock(&qqi->qqi_qsd->qsd_lock);
187 CDEBUG(D_QUOTA, "%s: losing global index lock for %s type\n",
188 qqi->qqi_qsd->qsd_svname, QTYPE_NAME((qqi->qqi_qtype)));
190 /* kick off reintegration thread if not running already, if
191 * it's just local cancel (for stack clean up or eviction),
192 * don't re-trigger the reintegration. */
193 if ((lock->l_flags & LDLM_FL_LOCAL_ONLY) == 0)
194 qsd_start_reint_thread(qqi);
196 lu_ref_del(&qqi->qqi_reference, "ast_data_get", lock);
201 LASSERTF(0, "invalid flags for blocking ast %d", flag);
208 * Glimpse callback handler for global quota lock.
210 * \param lock - is the lock targeted by the glimpse
211 * \param data - is a pointer to the glimpse ptlrpc request
213 static int qsd_glb_glimpse_ast(struct ldlm_lock *lock, void *data)
215 struct ptlrpc_request *req = data;
216 struct qsd_qtype_info *qqi;
217 struct ldlm_gl_lquota_desc *desc;
218 struct lquota_lvb *lvb;
219 struct lquota_glb_rec rec;
223 rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
227 qqi = qsd_glb_ast_data_get(lock, false);
230 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
232 CDEBUG(D_QUOTA, "%s: glimpse on glb quota locks, id:"LPU64" ver:"LPU64
233 " hard:" LPU64" soft:"LPU64"\n", qqi->qqi_qsd->qsd_svname,
234 desc->gl_id.qid_uid, desc->gl_ver, desc->gl_hardlimit,
237 if (desc->gl_ver == 0) {
238 CERROR("%s: invalid global index version "LPU64"\n",
239 qqi->qqi_qsd->qsd_svname, desc->gl_ver);
240 GOTO(out_qqi, rc = -EINVAL);
243 /* extract new hard & soft limits from the glimpse descriptor */
244 rec.qbr_hardlimit = desc->gl_hardlimit;
245 rec.qbr_softlimit = desc->gl_softlimit;
249 /* We can't afford disk io in the context of glimpse callback handling
250 * thread, so the on-disk global limits update has to be deferred. */
251 qsd_upd_schedule(qqi, NULL, &desc->gl_id, (union lquota_rec *)&rec,
255 lu_ref_del(&qqi->qqi_reference, "ast_data_get", lock);
262 struct ldlm_enqueue_info qsd_glb_einfo = { LDLM_PLAIN,
264 qsd_glb_blocking_ast,
269 * Blocking callback handler for per-ID lock
271 * \param lock - is the lock for which ast occurred.
272 * \param desc - is the description of a conflicting lock in case of blocking
274 * \param data - is the value of lock->l_ast_data
275 * \param flag - LDLM_CB_BLOCKING or LDLM_CB_CANCELING. Used to distinguish
276 * cancellation and blocking ast's.
278 static int qsd_id_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
279 void *data, int flag)
281 struct lustre_handle lockh;
286 case LDLM_CB_BLOCKING: {
288 LDLM_DEBUG(lock, "blocking AST on ID quota lock");
289 ldlm_lock2handle(lock, &lockh);
290 rc = ldlm_cli_cancel(&lockh);
293 case LDLM_CB_CANCELING: {
295 struct lquota_entry *lqe;
298 LDLM_DEBUG(lock, "canceling global quota lock");
299 lqe = qsd_id_ast_data_get(lock, true);
303 LQUOTA_DEBUG(lqe, "losing ID lock");
305 /* just local cancel (for stack clean up or eviction), don't
306 * release quota space in this case */
307 if ((lock->l_flags & LDLM_FL_LOCAL_ONLY) != 0) {
312 /* allocate environment */
320 /* initialize environment */
321 rc = lu_env_init(env, LCT_DT_THREAD);
328 ldlm_lock2handle(lock, &lockh);
330 if (lustre_handle_equal(&lockh, &lqe->lqe_lockh)) {
331 /* Clear lqe_lockh & reset qunit to 0 */
332 qsd_set_qunit(lqe, 0);
333 memset(&lqe->lqe_lockh, 0, sizeof(lqe->lqe_lockh));
334 lqe->lqe_edquot = false;
337 lqe_write_unlock(lqe);
339 /* If there is qqacq inflight, the release will be skipped
340 * at this time, and triggered on dqacq completion later,
341 * which means there could be a short window that slave is
342 * holding spare grant wihtout per-ID lock. */
344 rc = qsd_adjust(env, lqe);
346 /* release lqe reference grabbed by qsd_id_ast_data_get() */
353 LASSERTF(0, "invalid flags for blocking ast %d", flag);
360 * Glimpse callback handler for per-ID quota locks.
362 * \param lock - is the lock targeted by the glimpse
363 * \param data - is a pointer to the glimpse ptlrpc request
365 static int qsd_id_glimpse_ast(struct ldlm_lock *lock, void *data)
367 struct ptlrpc_request *req = data;
368 struct lquota_entry *lqe;
369 struct qsd_instance *qsd;
370 struct ldlm_gl_lquota_desc *desc;
371 struct lquota_lvb *lvb;
376 rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
380 lqe = qsd_id_ast_data_get(lock, false);
383 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
385 LQUOTA_DEBUG(lqe, "glimpse on quota locks, new qunit:"LPU64,
388 qsd = lqe2qqi(lqe)->qqi_qsd;
392 if (desc->gl_qunit != 0 && desc->gl_qunit != lqe->lqe_qunit) {
395 /* extract new qunit from glimpse request */
396 qsd_set_qunit(lqe, desc->gl_qunit);
398 space = lqe->lqe_granted - lqe->lqe_pending_rel;
399 space -= lqe->lqe_usage;
400 space -= lqe->lqe_pending_write + lqe->lqe_waiting_write;
401 space -= lqe->lqe_qunit;
404 if (lqe->lqe_pending_req > 0) {
405 LQUOTA_DEBUG(lqe, "request in flight, postpone "
406 "release of "LPD64, space);
407 lvb->lvb_id_may_rel = space;
409 lqe->lqe_pending_req++;
411 /* release quota space in glimpse reply */
412 LQUOTA_DEBUG(lqe, "releasing "LPD64, space);
413 lqe->lqe_granted -= space;
414 lvb->lvb_id_rel = space;
416 lqe_write_unlock(lqe);
417 /* change the lqe_granted */
418 qsd_upd_schedule(lqe2qqi(lqe), lqe, &lqe->lqe_id,
419 (union lquota_rec *)&lqe->lqe_granted,
423 lqe->lqe_pending_req--;
429 lqe->lqe_edquot = !!(desc->gl_flags & LQUOTA_FL_EDQUOT);
430 lqe_write_unlock(lqe);
433 cfs_waitq_broadcast(&lqe->lqe_waiters);
440 struct ldlm_enqueue_info qsd_id_einfo = { LDLM_PLAIN,
448 * Check whether a slave already own a ldlm lock for the quota identifier \qid.
450 * \param lockh - is the local lock handle from lquota entry.
451 * \param rlockh - is the remote lock handle of the matched lock, if any.
453 * \retval 0 : on successful look up and \lockh contains the lock handle.
454 * \retval -ENOENT: no lock found
456 int qsd_id_lock_match(struct lustre_handle *lockh, struct lustre_handle *rlockh)
458 struct ldlm_lock *lock;
464 if (!lustre_handle_is_used(lockh))
467 rc = ldlm_lock_addref_try(lockh, qsd_id_einfo.ei_mode);
471 LASSERT(lustre_handle_is_used(lockh));
472 ldlm_lock_dump_handle(D_QUOTA, lockh);
477 /* look up lock associated with local handle and extract remote handle
478 * to be packed in quota request */
479 lock = ldlm_handle2lock(lockh);
480 LASSERT(lock != NULL);
481 lustre_handle_copy(rlockh, &lock->l_remote_handle);
487 int qsd_id_lock_cancel(const struct lu_env *env, struct lquota_entry *lqe)
489 struct qsd_thread_info *qti = qsd_info(env);
494 if (lqe->lqe_pending_write || lqe->lqe_waiting_write ||
495 lqe->lqe_usage || lqe->lqe_granted) {
496 lqe_write_unlock(lqe);
500 lustre_handle_copy(&qti->qti_lockh, &lqe->lqe_lockh);
501 if (lustre_handle_is_used(&qti->qti_lockh)) {
502 memset(&lqe->lqe_lockh, 0, sizeof(lqe->lqe_lockh));
503 qsd_set_qunit(lqe, 0);
504 lqe->lqe_edquot = false;
506 lqe_write_unlock(lqe);
508 rc = qsd_id_lock_match(&qti->qti_lockh, NULL);
512 ldlm_lock_decref_and_cancel(&qti->qti_lockh, qsd_id_einfo.ei_mode);