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) 2012, 2013, Intel Corporation.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
28 * Author: Niu Yawei <yawei.niu@intel.com>
31 #define DEBUG_SUBSYSTEM S_LQUOTA
33 #include <lustre_dlm.h>
34 #include <obd_class.h>
36 #include "qsd_internal.h"
38 typedef int (enqi_bl_cb_t)(struct ldlm_lock *lock,
39 struct ldlm_lock_desc *desc, void *data,
41 static enqi_bl_cb_t qsd_glb_blocking_ast, qsd_id_blocking_ast;
43 typedef int (enqi_gl_cb_t)(struct ldlm_lock *lock, void *data);
44 static enqi_gl_cb_t qsd_glb_glimpse_ast, qsd_id_glimpse_ast;
46 struct ldlm_enqueue_info qsd_glb_einfo = {
47 .ei_type = LDLM_PLAIN,
49 .ei_cb_bl = qsd_glb_blocking_ast,
50 .ei_cb_cp = ldlm_completion_ast,
51 .ei_cb_gl = qsd_glb_glimpse_ast,
54 struct ldlm_enqueue_info qsd_id_einfo = {
55 .ei_type = LDLM_PLAIN,
57 .ei_cb_bl = qsd_id_blocking_ast,
58 .ei_cb_cp = ldlm_completion_ast,
59 .ei_cb_gl = qsd_id_glimpse_ast,
63 * Return qsd_qtype_info structure associated with a global lock
65 * \param lock - is the global lock from which we should extract the qqi
66 * \param reset - whether lock->l_ast_data should be cleared
68 static struct qsd_qtype_info *qsd_glb_ast_data_get(struct ldlm_lock *lock,
70 struct qsd_qtype_info *qqi;
73 lock_res_and_lock(lock);
74 qqi = lock->l_ast_data;
78 lock->l_ast_data = NULL;
80 unlock_res_and_lock(lock);
83 /* it is not safe to call lu_ref_add() under spinlock */
84 lu_ref_add(&qqi->qqi_reference, "ast_data_get", lock);
86 if (reset && qqi != NULL) {
87 /* release qqi reference hold for the lock */
88 lu_ref_del(&qqi->qqi_reference, "glb_lock", lock);
95 * Return lquota entry structure associated with a per-ID lock
97 * \param lock - is the per-ID lock from which we should extract the lquota
99 * \param reset - whether lock->l_ast_data should be cleared
101 static struct lquota_entry *qsd_id_ast_data_get(struct ldlm_lock *lock,
103 struct lquota_entry *lqe;
106 lock_res_and_lock(lock);
107 lqe = lock->l_ast_data;
111 lock->l_ast_data = NULL;
113 unlock_res_and_lock(lock);
115 if (reset && lqe != NULL)
116 /* release lqe reference hold for the lock */
122 * Glimpse callback handler for all quota locks. This function extracts
123 * information from the glimpse request.
125 * \param lock - is the lock targeted by the glimpse
126 * \param data - is a pointer to the glimpse ptlrpc request
127 * \param req - is the glimpse request
128 * \param desc - is the glimpse descriptor describing the purpose of the glimpse
130 * \param lvb - is the pointer to the lvb in the reply buffer
132 * \retval 0 on success and \desc, \lvb & \arg point to a valid structures,
133 * appropriate error on failure
135 static int qsd_common_glimpse_ast(struct ptlrpc_request *req,
136 struct ldlm_gl_lquota_desc **desc, void **lvb)
141 LASSERT(lustre_msg_get_opc(req->rq_reqmsg) == LDLM_GL_CALLBACK);
143 /* glimpse on quota locks always packs a glimpse descriptor */
144 req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_DESC_CALLBACK);
146 /* extract glimpse descriptor */
147 *desc = req_capsule_client_get(&req->rq_pill, &RMF_DLM_GL_DESC);
152 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
153 sizeof(struct lquota_lvb));
154 rc = req_capsule_server_pack(&req->rq_pill);
156 CERROR("Can't pack response, rc %d\n", rc);
161 *lvb = req_capsule_server_get(&req->rq_pill, &RMF_DLM_LVB);
167 * Blocking callback handler for global index lock
169 * \param lock - is the lock for which ast occurred.
170 * \param desc - is the description of a conflicting lock in case of blocking
172 * \param data - is the value of lock->l_ast_data
173 * \param flag - LDLM_CB_BLOCKING or LDLM_CB_CANCELING. Used to distinguish
174 * cancellation and blocking ast's.
176 static int qsd_glb_blocking_ast(struct ldlm_lock *lock,
177 struct ldlm_lock_desc *desc, void *data,
184 case LDLM_CB_BLOCKING: {
185 struct lustre_handle lockh;
187 LDLM_DEBUG(lock, "blocking AST on global quota lock");
188 ldlm_lock2handle(lock, &lockh);
189 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
192 case LDLM_CB_CANCELING: {
193 struct qsd_qtype_info *qqi;
195 LDLM_DEBUG(lock, "canceling global quota lock");
197 qqi = qsd_glb_ast_data_get(lock, true);
201 /* we are losing the global index lock, so let's mark the
202 * global & slave indexes as not up-to-date any more */
203 write_lock(&qqi->qqi_qsd->qsd_lock);
204 qqi->qqi_glb_uptodate = false;
205 qqi->qqi_slv_uptodate = false;
206 if (lock->l_handle.h_cookie == qqi->qqi_lockh.cookie)
207 memset(&qqi->qqi_lockh, 0, sizeof(qqi->qqi_lockh));
208 write_unlock(&qqi->qqi_qsd->qsd_lock);
210 CDEBUG(D_QUOTA, "%s: losing global index lock for %s type\n",
211 qqi->qqi_qsd->qsd_svname, QTYPE_NAME((qqi->qqi_qtype)));
213 /* kick off reintegration thread if not running already, if
214 * it's just local cancel (for stack clean up or eviction),
215 * don't re-trigger the reintegration. */
216 if (!ldlm_is_local_only(lock))
217 qsd_start_reint_thread(qqi);
219 lu_ref_del(&qqi->qqi_reference, "ast_data_get", lock);
224 LASSERTF(0, "invalid flags for blocking ast %d", flag);
231 * Glimpse callback handler for global quota lock.
233 * \param lock - is the lock targeted by the glimpse
234 * \param data - is a pointer to the glimpse ptlrpc request
236 static int qsd_glb_glimpse_ast(struct ldlm_lock *lock, void *data)
238 struct ptlrpc_request *req = data;
239 struct qsd_qtype_info *qqi;
240 struct ldlm_gl_lquota_desc *desc;
241 struct lquota_lvb *lvb;
242 struct lquota_glb_rec rec;
246 rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
250 qqi = qsd_glb_ast_data_get(lock, false);
253 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
255 CDEBUG(D_QUOTA, "%s: glimpse on glb quota locks, id:"LPU64" ver:"LPU64
256 " hard:" LPU64" soft:"LPU64"\n", qqi->qqi_qsd->qsd_svname,
257 desc->gl_id.qid_uid, desc->gl_ver, desc->gl_hardlimit,
260 if (desc->gl_ver == 0) {
261 CERROR("%s: invalid global index version "LPU64"\n",
262 qqi->qqi_qsd->qsd_svname, desc->gl_ver);
263 GOTO(out_qqi, rc = -EINVAL);
266 /* extract new hard & soft limits from the glimpse descriptor */
267 rec.qbr_hardlimit = desc->gl_hardlimit;
268 rec.qbr_softlimit = desc->gl_softlimit;
269 rec.qbr_time = desc->gl_time;
272 /* We can't afford disk io in the context of glimpse callback handling
273 * thread, so the on-disk global limits update has to be deferred. */
274 qsd_upd_schedule(qqi, NULL, &desc->gl_id, (union lquota_rec *)&rec,
278 lu_ref_del(&qqi->qqi_reference, "ast_data_get", lock);
286 * Blocking callback handler for per-ID lock
288 * \param lock - is the lock for which ast occurred.
289 * \param desc - is the description of a conflicting lock in case of blocking
291 * \param data - is the value of lock->l_ast_data
292 * \param flag - LDLM_CB_BLOCKING or LDLM_CB_CANCELING. Used to distinguish
293 * cancellation and blocking ast's.
295 static int qsd_id_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
296 void *data, int flag)
298 struct lustre_handle lockh;
303 case LDLM_CB_BLOCKING: {
305 LDLM_DEBUG(lock, "blocking AST on ID quota lock");
306 ldlm_lock2handle(lock, &lockh);
307 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
310 case LDLM_CB_CANCELING: {
312 struct lquota_entry *lqe;
314 LDLM_DEBUG(lock, "canceling global quota lock");
315 lqe = qsd_id_ast_data_get(lock, true);
319 LQUOTA_DEBUG(lqe, "losing ID lock");
321 ldlm_lock2handle(lock, &lockh);
323 if (lustre_handle_equal(&lockh, &lqe->lqe_lockh)) {
324 /* Clear lqe_lockh & reset qunit to 0 */
325 qsd_set_qunit(lqe, 0);
326 memset(&lqe->lqe_lockh, 0, sizeof(lqe->lqe_lockh));
327 qsd_set_edquot(lqe, false);
329 lqe_write_unlock(lqe);
331 /* If there is dqacq inflight, the release will be skipped
332 * at this time, and triggered on dqacq completion later,
333 * which means there could be a short window that slave is
334 * holding spare grant wihtout per-ID lock. */
336 /* don't release quota space for local cancel (stack clean
338 if (!ldlm_is_local_only(lock)) {
339 /* allocate environment */
347 /* initialize environment */
348 rc = lu_env_init(env, LCT_DT_THREAD);
355 rc = qsd_adjust(env, lqe);
361 /* release lqe reference grabbed by qsd_id_ast_data_get() */
366 LASSERTF(0, "invalid flags for blocking ast %d", flag);
373 * Glimpse callback handler for per-ID quota locks.
375 * \param lock - is the lock targeted by the glimpse
376 * \param data - is a pointer to the glimpse ptlrpc request
378 static int qsd_id_glimpse_ast(struct ldlm_lock *lock, void *data)
380 struct ptlrpc_request *req = data;
381 struct lquota_entry *lqe;
382 struct qsd_instance *qsd;
383 struct ldlm_gl_lquota_desc *desc;
384 struct lquota_lvb *lvb;
389 rc = qsd_common_glimpse_ast(req, &desc, (void **)&lvb);
393 lqe = qsd_id_ast_data_get(lock, false);
396 GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
398 LQUOTA_DEBUG(lqe, "glimpse on quota locks, new qunit:"LPU64,
401 qsd = lqe2qqi(lqe)->qqi_qsd;
405 if (desc->gl_qunit != 0 && desc->gl_qunit != lqe->lqe_qunit) {
408 /* extract new qunit from glimpse request */
409 qsd_set_qunit(lqe, desc->gl_qunit);
411 space = lqe->lqe_granted - lqe->lqe_pending_rel;
412 space -= lqe->lqe_usage;
413 space -= lqe->lqe_pending_write + lqe->lqe_waiting_write;
414 space -= lqe->lqe_qunit;
417 if (lqe->lqe_pending_req > 0) {
418 LQUOTA_DEBUG(lqe, "request in flight, postpone "
419 "release of "LPD64, space);
420 lvb->lvb_id_may_rel = space;
422 lqe->lqe_pending_req++;
424 /* release quota space in glimpse reply */
425 LQUOTA_DEBUG(lqe, "releasing "LPD64, space);
426 lqe->lqe_granted -= space;
427 lvb->lvb_id_rel = space;
429 lqe_write_unlock(lqe);
430 /* change the lqe_granted */
431 qsd_upd_schedule(lqe2qqi(lqe), lqe, &lqe->lqe_id,
432 (union lquota_rec *)&lqe->lqe_granted,
436 lqe->lqe_pending_req--;
442 qsd_set_edquot(lqe, !!(desc->gl_flags & LQUOTA_FL_EDQUOT));
443 lqe_write_unlock(lqe);
446 wake_up_all(&lqe->lqe_waiters);
454 * Check whether a slave already own a ldlm lock for the quota identifier \qid.
456 * \param lockh - is the local lock handle from lquota entry.
457 * \param rlockh - is the remote lock handle of the matched lock, if any.
459 * \retval 0 : on successful look up and \lockh contains the lock handle.
460 * \retval -ENOENT: no lock found
462 int qsd_id_lock_match(struct lustre_handle *lockh, struct lustre_handle *rlockh)
464 struct ldlm_lock *lock;
470 if (!lustre_handle_is_used(lockh))
473 rc = ldlm_lock_addref_try(lockh, qsd_id_einfo.ei_mode);
477 LASSERT(lustre_handle_is_used(lockh));
478 ldlm_lock_dump_handle(D_QUOTA, lockh);
481 /* caller not interested in remote handle */
484 /* look up lock associated with local handle and extract remote handle
485 * to be packed in quota request */
486 lock = ldlm_handle2lock(lockh);
487 LASSERT(lock != NULL);
488 lustre_handle_copy(rlockh, &lock->l_remote_handle);
494 int qsd_id_lock_cancel(const struct lu_env *env, struct lquota_entry *lqe)
496 struct qsd_thread_info *qti = qsd_info(env);
501 if (lqe->lqe_pending_write || lqe->lqe_waiting_write ||
502 lqe->lqe_usage || lqe->lqe_granted) {
503 lqe_write_unlock(lqe);
507 lustre_handle_copy(&qti->qti_lockh, &lqe->lqe_lockh);
508 if (lustre_handle_is_used(&qti->qti_lockh)) {
509 memset(&lqe->lqe_lockh, 0, sizeof(lqe->lqe_lockh));
510 qsd_set_qunit(lqe, 0);
511 qsd_set_edquot(lqe, false);
513 lqe_write_unlock(lqe);
515 rc = qsd_id_lock_match(&qti->qti_lockh, NULL);
519 ldlm_lock_decref_and_cancel(&qti->qti_lockh, qsd_id_einfo.ei_mode);