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, 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 (qti->qti_glb_rec.qbr_hardlimit == 0 &&
85 qti->qti_glb_rec.qbr_softlimit == 0)
86 /* quota isn't enforced for this use */
87 lqe->lqe_enforced = false;
89 lqe->lqe_enforced = true;
92 LQUOTA_ERROR(lqe, "failed to read quota entry from global "
93 "index copy, rc:%d", rc);
97 /* read record from slave index copy to find out how much space is
98 * currently owned by this slave */
99 rc = lquota_disk_read(env, qqi->qqi_slv_obj, &lqe->lqe_id,
100 (struct dt_rec *)&qti->qti_slv_rec);
103 lqe->lqe_granted = 0;
106 lqe->lqe_granted = qti->qti_slv_rec.qsr_granted;
109 LQUOTA_ERROR(lqe, "failed to read quota entry from slave "
110 "index copy, rc:%d", rc);
114 /* don't know what the qunit value is yet */
115 qsd_set_qunit(lqe, 0);
117 /* read current disk-usage from disk */
118 rc = qsd_refresh_usage(env, lqe);
122 LQUOTA_DEBUG(lqe, "successfully read from disk");
127 * Print lqe information for debugging.
129 * \param lqe - is the quota entry to debug
130 * \param arg - is the pointer to the qsd_qtype_info structure
131 * \param msgdata - debug message
132 * \param fmt - format of debug message
134 static void qsd_lqe_debug(struct lquota_entry *lqe, void *arg,
135 struct libcfs_debug_msg_data *msgdata,
136 const char *fmt, va_list args)
138 struct qsd_qtype_info *qqi = (struct qsd_qtype_info *)arg;
140 libcfs_debug_vmsg2(msgdata, fmt, args,
141 "qsd:%s qtype:%s id:"LPU64" enforced:%d granted:"
142 LPU64" pending:"LPU64" waiting:"LPU64" req:%d usage:"
143 LPU64" qunit:"LPU64" qtune:"LPU64" edquot:%d\n",
144 qqi->qqi_qsd->qsd_svname, QTYPE_NAME(qqi->qqi_qtype),
145 lqe->lqe_id.qid_uid, lqe->lqe_enforced,
146 lqe->lqe_granted, lqe->lqe_pending_write,
147 lqe->lqe_waiting_write, lqe->lqe_pending_req,
148 lqe->lqe_usage, lqe->lqe_qunit, lqe->lqe_qtune,
153 * Vector of quota entry operations supported on the slave
155 struct lquota_entry_operations qsd_lqe_ops = {
156 .lqe_init = qsd_lqe_init,
157 .lqe_read = qsd_lqe_read,
158 .lqe_debug = qsd_lqe_debug,
161 int qsd_write_version(const struct lu_env *env, struct qsd_qtype_info *qqi,
162 __u64 ver, bool global)
164 struct qsd_instance *qsd = qqi->qqi_qsd;
165 struct dt_object *obj = global ? qqi->qqi_glb_obj :
170 rc = lquota_disk_update_ver(env, qsd->qsd_dev, obj, ver);
174 qsd_bump_version(qqi, ver, global);
179 * Consult current disk space consumed by a given identifier.
181 * \param env - the environment passed by the caller
182 * \param qqi - is the pointer to the qsd_qtype_info structure associated
183 * with the identifier.
184 * \param lqe - is the quota entry associated with the identifier
186 int qsd_refresh_usage(const struct lu_env *env, struct lquota_entry *lqe)
188 struct qsd_thread_info *qti = qsd_info(env);
189 struct lquota_acct_rec *rec = &qti->qti_acct_rec;
190 struct qsd_qtype_info *qqi = lqe2qqi(lqe);
194 LASSERT(qqi->qqi_acct_obj);
196 /* read disk usage */
197 rc = lquota_disk_read(env, qqi->qqi_acct_obj, &lqe->lqe_id,
198 (struct dt_rec *)rec);
205 if (qqi->qqi_qsd->qsd_is_md)
206 lqe->lqe_usage = rec->ispace;
208 lqe->lqe_usage = toqb(rec->bspace);
211 LQUOTA_ERROR(lqe, "failed to read disk usage, rc:%d", rc);
215 LQUOTA_DEBUG(lqe, "disk usage: "LPU64, lqe->lqe_usage);
220 * Update slave or global index copy.
222 * \param env - the environment passed by the caller
223 * \param qqi - is the qsd_type_info structure managing the index to be
225 * \param qid - is the identifier for which we need to update the quota
227 * \param global - is set to true when updating the global index copy and to
228 * false for the slave index copy.
229 * \param ver - is the new version of the index. If equal to 0, the version
230 * of the index isn't changed
231 * \param rec - is the updated record to insert in the index file
233 int qsd_update_index(const struct lu_env *env, struct qsd_qtype_info *qqi,
234 union lquota_id *qid, bool global, __u64 ver, void *rec)
236 struct thandle *th = NULL;
237 struct dt_object *obj;
238 __u64 *new_verp = NULL;
243 obj = global ? qqi->qqi_glb_obj : qqi->qqi_slv_obj;
245 /* allocate transaction */
246 th = dt_trans_create(env, qqi->qqi_qsd->qsd_dev);
250 /* reserve enough credits to update record in index file */
251 rc = lquota_disk_declare_write(env, th, obj, qid);
255 /* start local transaction */
256 rc = dt_trans_start_local(env, qqi->qqi_qsd->qsd_dev, th);
261 /* Update record in global index copy */
262 struct lquota_glb_rec *glb_rec = (struct lquota_glb_rec *)rec;
264 CDEBUG(D_QUOTA, "%s: updating global index hardlimit: "LPU64", "
265 "softlimit: "LPU64" for id "LPU64"\n",
266 qqi->qqi_qsd->qsd_svname, glb_rec->qbr_hardlimit,
267 glb_rec->qbr_softlimit, qid->qid_uid);
269 /* Update record in slave index copy */
270 struct lquota_slv_rec *slv_rec = (struct lquota_slv_rec *)rec;
272 CDEBUG(D_QUOTA, "%s: update granted to "LPU64" for id "LPU64
273 "\n", qqi->qqi_qsd->qsd_svname, slv_rec->qsr_granted,
279 flags = LQUOTA_SET_VER;
282 /* write new record to index file */
283 rc = lquota_disk_write(env, th, obj, qid, (struct dt_rec *)rec, flags,
287 dt_trans_stop(env, qqi->qqi_qsd->qsd_dev, th);
289 CERROR("%s: failed to update %s index copy for id "LPU64", rc:"
290 "%d\n", qqi->qqi_qsd->qsd_svname,
291 global ? "global" : "slave", qid->qid_uid, rc);
292 else if (flags == LQUOTA_SET_VER)
293 qsd_bump_version(qqi, ver, global);
298 * Update in-memory lquota entry with new quota setting from record \rec.
299 * The record can either be a global record (i.e. lquota_glb_rec) or a slave
300 * index record (i.e. lquota_slv_rec). In the former case, \global should be
303 * \param env - the environment passed by the caller
304 * \param lqe - is the quota entry associated with the identifier
305 * \param global - is set to true when updating the record is of type
306 * lquota_glb_rec. Otherwise, it is a lquota_slv_rec record.
307 * \param rec - is the updated record received from the master.
309 int qsd_update_lqe(const struct lu_env *env, struct lquota_entry *lqe,
310 bool global, void *rec)
314 LASSERT(lqe != NULL);
315 LASSERT(!lqe_is_master(lqe));
317 /* updating lqe is always serialized, no locking needed. */
319 struct lquota_glb_rec *glb_rec = (struct lquota_glb_rec *)rec;
321 /* change enforcement status based on new hard/soft limit */
322 lqe->lqe_enforced = (glb_rec->qbr_hardlimit ||
323 glb_rec->qbr_softlimit) ? true : false;
325 LQUOTA_DEBUG(lqe, "updating global index hardlimit: "LPU64", "
326 "softlimit: "LPU64, glb_rec->qbr_hardlimit,
327 glb_rec->qbr_softlimit);
329 struct lquota_slv_rec *slv_rec = (struct lquota_slv_rec *)rec;
331 lqe->lqe_granted = slv_rec->qsr_granted;
333 LQUOTA_DEBUG(lqe, "updating slave index, granted:"LPU64"",
334 slv_rec->qsr_granted);