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