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, 2017, 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 "qsd_internal.h"
36 * Initialize qsd-specific fields of quota entry.
38 * \param lqe - is the quota entry to initialize
39 * \param arg - is the pointer to the qsd_qtype_info structure
41 static void qsd_lqe_init(struct lquota_entry *lqe, void *arg)
43 LASSERT(!lqe_is_master(lqe));
45 /* initialize slave parameters */
46 rwlock_init(&lqe->lqe_lock);
47 memset(&lqe->lqe_lockh, 0, sizeof(lqe->lqe_lockh));
48 lqe->lqe_pending_write = 0;
49 lqe->lqe_pending_req = 0;
50 init_waitqueue_head(&lqe->lqe_waiters);
52 lqe->lqe_nopreacq = false;
56 * Update a slave quota entry. This is done by reading enforcement status from
57 * the copy of the global index and then how much is the slave currenly owns
58 * for this user from the slave index copy.
60 * \param env - the environment passed by the caller
61 * \param lqe - is the quota entry to refresh
62 * \param arg - is the pointer to the qsd_qtype_info structure
64 static int qsd_lqe_read(const struct lu_env *env, struct lquota_entry *lqe,
67 struct qsd_thread_info *qti = qsd_info(env);
68 struct qsd_qtype_info *qqi = (struct qsd_qtype_info *)arg;
71 LASSERT(!lqe_is_master(lqe));
73 /* read record from global index copy to know whether quota is
74 * enforced for this user */
75 rc = lquota_disk_read(env, qqi->qqi_glb_obj, &lqe->lqe_id,
76 (struct dt_rec *)&qti->qti_glb_rec);
80 /* no such entry, assume quota isn't enforced for this user */
81 lqe->lqe_enforced = false;
84 if (lqe->lqe_id.qid_uid == 0) {
85 qqi->qqi_default_hardlimit =
86 qti->qti_glb_rec.qbr_hardlimit;
87 qqi->qqi_default_softlimit =
88 qti->qti_glb_rec.qbr_softlimit;
89 qqi->qqi_default_gracetime =
90 qti->qti_glb_rec.qbr_granted;
93 if (lqe->lqe_id.qid_uid != 0 &&
94 (qti->qti_glb_rec.qbr_hardlimit != 0 ||
95 qti->qti_glb_rec.qbr_softlimit != 0))
96 lqe->lqe_enforced = true;
98 lqe->lqe_enforced = false;
101 LQUOTA_ERROR(lqe, "failed to read quota entry from global "
102 "index copy, rc:%d", rc);
106 if (lqe->lqe_id.qid_uid != 0 &&
108 (LQUOTA_FLAG(qti->qti_glb_rec.qbr_time) & LQUOTA_FLAG_DEFAULT &&
109 qti->qti_glb_rec.qbr_hardlimit == 0 &&
110 qti->qti_glb_rec.qbr_softlimit == 0))) {
111 struct lquota_entry *lqe_def;
112 union lquota_id qid = { {0} };
114 /* ensure the lqe storing the default quota setting loaded */
115 lqe_def = lqe_locate(env, qqi->qqi_site, &qid);
117 lqe->lqe_is_default = true;
119 if (qqi->qqi_default_hardlimit != 0 ||
120 qqi->qqi_default_softlimit != 0) {
121 LQUOTA_DEBUG(lqe, "enforced by default quota");
122 lqe->lqe_enforced = true;
125 if (!IS_ERR(lqe_def))
129 /* read record from slave index copy to find out how much space is
130 * currently owned by this slave */
131 rc = lquota_disk_read(env, qqi->qqi_slv_obj, &lqe->lqe_id,
132 (struct dt_rec *)&qti->qti_slv_rec);
135 lqe->lqe_granted = 0;
138 lqe->lqe_granted = qti->qti_slv_rec.qsr_granted;
141 LQUOTA_ERROR(lqe, "failed to read quota entry from slave "
142 "index copy, rc:%d", rc);
146 /* don't know what the qunit value is yet */
147 qsd_set_qunit(lqe, 0);
149 /* read current disk-usage from disk */
150 rc = qsd_refresh_usage(env, lqe);
154 LQUOTA_DEBUG(lqe, "successfully read from disk");
159 * Print lqe information for debugging.
161 * \param lqe - is the quota entry to debug
162 * \param arg - is the pointer to the qsd_qtype_info structure
163 * \param msgdata - debug message
164 * \param fmt - format of debug message
166 static void qsd_lqe_debug(struct lquota_entry *lqe, void *arg,
167 struct libcfs_debug_msg_data *msgdata,
168 struct va_format *vaf)
170 struct qsd_qtype_info *qqi = (struct qsd_qtype_info *)arg;
172 libcfs_debug_msg(msgdata,
173 "%pV qsd:%s qtype:%s id:%llu enforced:%d granted: %llu pending:%llu waiting:%llu req:%d usage: %llu qunit:%llu qtune:%llu edquot:%d default:%s\n",
175 qqi->qqi_qsd->qsd_svname, qtype_name(qqi->qqi_qtype),
176 lqe->lqe_id.qid_uid, lqe->lqe_enforced,
177 lqe->lqe_granted, lqe->lqe_pending_write,
178 lqe->lqe_waiting_write, lqe->lqe_pending_req,
179 lqe->lqe_usage, lqe->lqe_qunit, lqe->lqe_qtune,
180 lqe->lqe_edquot, lqe->lqe_is_default ? "yes" : "no");
184 * Vector of quota entry operations supported on the slave
186 struct lquota_entry_operations qsd_lqe_ops = {
187 .lqe_init = qsd_lqe_init,
188 .lqe_read = qsd_lqe_read,
189 .lqe_debug = qsd_lqe_debug,
192 int qsd_write_version(const struct lu_env *env, struct qsd_qtype_info *qqi,
193 __u64 ver, bool global)
195 struct qsd_instance *qsd = qqi->qqi_qsd;
196 struct dt_object *obj = global ? qqi->qqi_glb_obj :
201 rc = lquota_disk_update_ver(env, qsd->qsd_dev, obj, ver);
205 qsd_bump_version(qqi, ver, global);
210 * Consult current disk space consumed by a given identifier.
212 * \param env - the environment passed by the caller
213 * \param qqi - is the pointer to the qsd_qtype_info structure associated
214 * with the identifier.
215 * \param lqe - is the quota entry associated with the identifier
217 int qsd_refresh_usage(const struct lu_env *env, struct lquota_entry *lqe)
219 struct qsd_thread_info *qti = qsd_info(env);
220 struct lquota_acct_rec *rec = &qti->qti_acct_rec;
221 struct qsd_qtype_info *qqi = lqe2qqi(lqe);
225 LASSERT(qqi->qqi_acct_obj);
227 /* read disk usage */
228 rc = lquota_disk_read(env, qqi->qqi_acct_obj, &lqe->lqe_id,
229 (struct dt_rec *)rec);
236 if (qqi->qqi_qsd->qsd_is_md)
237 lqe->lqe_usage = rec->ispace;
239 lqe->lqe_usage = toqb(rec->bspace);
242 LQUOTA_ERROR(lqe, "failed to read disk usage, rc:%d", rc);
246 LQUOTA_DEBUG(lqe, "disk usage: %llu", lqe->lqe_usage);
251 * Update slave or global index copy.
253 * \param env - the environment passed by the caller
254 * \param qqi - is the qsd_type_info structure managing the index to be
256 * \param qid - is the identifier for which we need to update the quota
258 * \param global - is set to true when updating the global index copy and to
259 * false for the slave index copy.
260 * \param ver - is the new version of the index. If equal to 0, the version
261 * of the index isn't changed
262 * \param rec - is the updated record to insert in the index file
264 int qsd_update_index(const struct lu_env *env, struct qsd_qtype_info *qqi,
265 union lquota_id *qid, bool global, __u64 ver, void *rec)
267 struct thandle *th = NULL;
268 struct dt_object *obj;
269 __u64 *new_verp = NULL;
274 obj = global ? qqi->qqi_glb_obj : qqi->qqi_slv_obj;
276 /* allocate transaction */
277 th = dt_trans_create(env, qqi->qqi_qsd->qsd_dev);
281 /* reserve enough credits to update record in index file */
282 rc = lquota_disk_declare_write(env, th, obj, qid);
286 /* start local transaction */
287 rc = dt_trans_start_local(env, qqi->qqi_qsd->qsd_dev, th);
292 /* Update record in global index copy */
293 struct lquota_glb_rec *glb_rec = (struct lquota_glb_rec *)rec;
295 CDEBUG(D_QUOTA, "%s: updating global index hardlimit: %llu, "
296 "softlimit: %llu for id %llu\n",
297 qqi->qqi_qsd->qsd_svname, glb_rec->qbr_hardlimit,
298 glb_rec->qbr_softlimit, qid->qid_uid);
300 /* Update record in slave index copy */
301 struct lquota_slv_rec *slv_rec = (struct lquota_slv_rec *)rec;
303 CDEBUG(D_QUOTA, "%s: update granted to %llu for id %llu"
304 "\n", qqi->qqi_qsd->qsd_svname, slv_rec->qsr_granted,
310 flags = LQUOTA_SET_VER;
313 /* write new record to index file */
314 rc = lquota_disk_write(env, th, obj, qid, (struct dt_rec *)rec, flags,
318 dt_trans_stop(env, qqi->qqi_qsd->qsd_dev, th);
320 CERROR("%s: failed to update %s index copy for id %llu, : rc = %d\n",
321 qqi->qqi_qsd->qsd_svname,
322 global ? "global" : "slave", qid->qid_uid, rc);
323 else if (flags == LQUOTA_SET_VER)
324 qsd_bump_version(qqi, ver, global);
329 * Update in-memory lquota entry with new quota setting from record \rec.
330 * The record can either be a global record (i.e. lquota_glb_rec) or a slave
331 * index record (i.e. lquota_slv_rec). In the former case, \global should be
334 * \param env - the environment passed by the caller
335 * \param lqe - is the quota entry associated with the identifier
336 * \param global - is set to true when updating the record is of type
337 * lquota_glb_rec. Otherwise, it is a lquota_slv_rec record.
338 * \param rec - is the updated record received from the master.
340 int qsd_update_lqe(const struct lu_env *env, struct lquota_entry *lqe,
341 bool global, void *rec)
345 LASSERT(lqe != NULL);
346 LASSERT(!lqe_is_master(lqe));
348 /* updating lqe is always serialized, no locking needed. */
350 struct lquota_glb_rec *glb_rec = (struct lquota_glb_rec *)rec;
352 /* doesn't change quota enforcement if the quota entry is still
353 * using default quota. */
354 if (LQUOTA_FLAG(glb_rec->qbr_time) & LQUOTA_FLAG_DEFAULT &&
355 glb_rec->qbr_hardlimit == 0 && glb_rec->qbr_softlimit == 0)
358 LQUOTA_DEBUG(lqe, "the ID has been set quota, so clear the"
359 " default quota flag");
360 lqe->lqe_is_default = false;
362 /* change enforcement status based on new hard/soft limit */
363 if (lqe->lqe_id.qid_uid != 0 && (glb_rec->qbr_hardlimit != 0 ||
364 glb_rec->qbr_softlimit != 0))
365 lqe->lqe_enforced = true;
367 lqe->lqe_enforced = false;
369 LQUOTA_DEBUG(lqe, "updating global index hardlimit: %llu, "
370 "softlimit: %llu", glb_rec->qbr_hardlimit,
371 glb_rec->qbr_softlimit);
373 struct lquota_slv_rec *slv_rec = (struct lquota_slv_rec *)rec;
375 lqe->lqe_granted = slv_rec->qsr_granted;
377 LQUOTA_DEBUG(lqe, "updating slave index, granted:%llu",
378 slv_rec->qsr_granted);