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.
28 #ifndef _LUSTRE_QUOTA_H
29 #define _LUSTRE_QUOTA_H
31 /** \defgroup quota quota
35 #include <linux/lustre_quota.h>
37 #include <dt_object.h>
38 #include <lustre_fid.h>
39 #include <lustre_dlm.h>
42 #define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */
46 #define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */
49 struct lquota_id_info;
52 /* Gather all quota record type in an union that can be used to read any records
53 * from disk. All fields of these records must be 64-bit aligned, otherwise the
54 * OSD layer may swab them incorrectly. */
56 struct lquota_glb_rec lqr_glb_rec;
57 struct lquota_slv_rec lqr_slv_rec;
58 struct lquota_acct_rec lqr_acct_rec;
61 /* Index features supported by the global index objects
62 * Only used for migration purpose and should be removed once on-disk migration
63 * is no longer needed */
64 extern struct dt_index_features dt_quota_iusr_features;
65 extern struct dt_index_features dt_quota_busr_features;
66 extern struct dt_index_features dt_quota_igrp_features;
67 extern struct dt_index_features dt_quota_bgrp_features;
69 /* Name used in the configuration logs to identify the default metadata pool
70 * (composed of all the MDTs, with pool ID 0) and the default data pool (all
71 * the OSTs, with pool ID 0 too). */
72 #define QUOTA_METAPOOL_NAME "mdt="
73 #define QUOTA_DATAPOOL_NAME "ost="
76 * Quota Master Target support
79 /* Request handlers for quota master operations.
80 * This is used by the MDT to pass quota/lock requests to the quota master
81 * target. This won't be needed any more once the QMT is a real target and
82 * does not rely any more on the MDT service threads and namespace. */
84 /* Handle quotactl request from client. */
85 int (*qmth_quotactl)(const struct lu_env *, struct lu_device *,
86 struct obd_quotactl *);
88 /* Handle dqacq/dqrel request from slave. */
89 int (*qmth_dqacq)(const struct lu_env *, struct lu_device *,
90 struct ptlrpc_request *);
92 /* LDLM intent policy associated with quota locks */
93 int (*qmth_intent_policy)(const struct lu_env *, struct lu_device *,
94 struct ptlrpc_request *, struct ldlm_lock **,
97 /* Initialize LVB of ldlm resource associated with quota objects */
98 int (*qmth_lvbo_init)(struct lu_device *, struct ldlm_resource *);
100 /* Update LVB of ldlm resource associated with quota objects */
101 int (*qmth_lvbo_update)(struct lu_device *, struct ldlm_resource *,
102 struct ptlrpc_request *, int);
104 /* Return size of LVB to be packed in ldlm message */
105 int (*qmth_lvbo_size)(struct lu_device *, struct ldlm_lock *);
107 /* Fill request buffer with lvb */
108 int (*qmth_lvbo_fill)(struct lu_device *, struct ldlm_lock *, void *,
111 /* Free lvb associated with ldlm resource */
112 int (*qmth_lvbo_free)(struct lu_device *, struct ldlm_resource *);
115 /* actual handlers are defined in lustre/quota/qmt_handler.c */
116 extern struct qmt_handlers qmt_hdls;
119 * Quota enforcement support on slaves
124 /* The quota slave feature is implemented under the form of a library.
125 * The API is the following:
127 * - qsd_init(): the user (mostly the OSD layer) should first allocate a qsd
128 * instance via qsd_init(). This creates all required structures
129 * to manage quota enforcement for this target and performs all
130 * low-level initialization which does not involve any lustre
131 * object. qsd_init() should typically be called when the OSD
134 * - qsd_prepare(): This sets up on-disk objects associated with the quota slave
135 * feature and initiates the quota reintegration procedure if
136 * needed. qsd_prepare() should typically be called when
137 * ->ldo_prepare is invoked.
139 * - qsd_start(): a qsd instance should be started once recovery is completed
140 * (i.e. when ->ldo_recovery_complete is called). This is used
141 * to notify the qsd layer that quota should now be enforced
142 * again via the qsd_op_begin/end functions. The last step of the
143 * reintegration prodecure (namely usage reconciliation) will be
144 * completed during start.
146 * - qsd_fini(): is used to release a qsd_instance structure allocated with
147 * qsd_init(). This releases all quota slave objects and frees the
148 * structures associated with the qsd_instance.
150 * - qsd_op_begin(): is used to enforce quota, it must be called in the
151 * declaration of each operation. qsd_op_end() should then be
152 * invoked later once all operations have been completed in
153 * order to release/adjust the quota space.
154 * Running qsd_op_begin() before qsd_start() isn't fatal and
155 * will return success.
156 * Once qsd_start() has been run, qsd_op_begin() will block
157 * until the reintegration procedure is completed.
159 * - qsd_op_end(): performs the post operation quota processing. This must be
160 * called after the operation transaction stopped.
161 * While qsd_op_begin() must be invoked each time a new
162 * operation is declared, qsd_op_end() should be called only
163 * once for the whole transaction.
165 * - qsd_op_adjust(): triggers pre-acquire/release if necessary.
167 * Below are the function prototypes to be used by OSD layer to manage quota
168 * enforcement. Arguments are documented where each function is defined. */
170 struct qsd_instance *qsd_init(const struct lu_env *, char *, struct dt_device *,
171 struct proc_dir_entry *);
172 int qsd_prepare(const struct lu_env *, struct qsd_instance *);
173 int qsd_start(const struct lu_env *, struct qsd_instance *);
174 void qsd_fini(const struct lu_env *, struct qsd_instance *);
175 int qsd_op_begin(const struct lu_env *, struct qsd_instance *,
176 struct lquota_trans *, struct lquota_id_info *, int *);
177 void qsd_op_end(const struct lu_env *, struct qsd_instance *,
178 struct lquota_trans *);
179 void qsd_op_adjust(const struct lu_env *, struct qsd_instance *,
180 union lquota_id *, int);
181 /* This is exported for the ldiskfs quota migration only,
182 * see convert_quota_file() */
183 int lquota_disk_write_glb(const struct lu_env *, struct dt_object *,
184 __u64, struct lquota_glb_rec *);
187 * Quota information attached to a transaction
192 struct lquota_id_info {
193 /* quota identifier */
194 union lquota_id lqi_id;
196 /* USRQUOTA or GRPQUOTA for now, could be expanded for
197 * directory quota or other types later. */
200 /* inodes or kbytes to be consumed or released, it could
201 * be negative when releasing space. */
204 /* quota slave entry structure associated with this ID */
205 struct lquota_entry *lqi_qentry;
207 /* whether we are reporting blocks or inodes */
211 /* Since we enforce only inode quota in meta pool (MDTs), and block quota in
212 * data pool (OSTs), there are at most 4 quota ids being enforced in a single
213 * transaction, which is chown transaction:
214 * original uid and gid, new uid and gid.
216 * This value might need to be revised when directory quota is added. */
217 #define QUOTA_MAX_TRANSIDS 4
219 /* all qids involved in a single transaction */
220 struct lquota_trans {
221 unsigned short lqt_id_cnt;
222 struct lquota_id_info lqt_ids[QUOTA_MAX_TRANSIDS];
225 /* flags for quota local enforcement */
226 #define QUOTA_FL_OVER_USRQUOTA 0x01
227 #define QUOTA_FL_OVER_GRPQUOTA 0x02
228 #define QUOTA_FL_SYNC 0x04
230 #define IS_LQUOTA_RES(res) \
231 (res->lr_name.name[LUSTRE_RES_ID_SEQ_OFF] == FID_SEQ_QUOTA || \
232 res->lr_name.name[LUSTRE_RES_ID_SEQ_OFF] == FID_SEQ_QUOTA_GLB)
234 /* helper function used by MDT & OFD to retrieve quota accounting information
236 int lquotactl_slv(const struct lu_env *, struct dt_device *,
237 struct obd_quotactl *);
239 #endif /* _LUSTRE_QUOTA_H */