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24 * Copyright (c) 2012, 2014, Intel Corporation.
25 * Use is subject to license terms.
28 #include "lquota_internal.h"
30 #ifndef _QSD_INTERNAL_H
31 #define _QSD_INTERNAL_H
36 extern struct kmem_cache *upd_kmem;
39 * A QSD instance implements quota enforcement support for a given OSD.
40 * The instance can be created via qsd_init() and then freed with qsd_fini().
41 * This structure gathers all quota parameters and pointers to on-disk indexes
42 * required on quota slave to:
43 * i. acquire/release quota space from the QMT;
44 * ii. allocate this quota space to local requests.
47 /* name of service which created this qsd instance */
48 char qsd_svname[MAX_OBD_NAME];
50 /* dt_device associated with this qsd instance */
51 struct dt_device *qsd_dev;
53 /* procfs directory where information related to the underlying slaves
55 struct proc_dir_entry *qsd_proc;
57 /* export used for the connection to quota master */
58 struct obd_export *qsd_exp;
60 /* ldlm namespace used for quota locks */
61 struct ldlm_namespace *qsd_ns;
63 /* on-disk directory where to store index files for this qsd instance */
64 struct dt_object *qsd_root;
66 /* We create 2 quota slave instances:
67 * - one for user quota
68 * - one for group quota
70 * This will have to be revisited if new quota types are added in the
71 * future. For the time being, we can just use an array. */
72 struct qsd_qtype_info *qsd_type_array[LL_MAXQUOTAS];
74 /* per-filesystem quota information */
75 struct qsd_fsinfo *qsd_fsinfo;
77 /* link into qfs_qsd_list of qfs_fsinfo */
78 struct list_head qsd_link;
80 /* list of lqe entry which might need quota space adjustment */
81 struct list_head qsd_adjust_list;
83 /* lock protecting adjust list */
84 spinlock_t qsd_adjust_lock;
86 /* dedicated thread for updating slave index files. */
87 struct task_struct *qsd_upd_task;
89 /* list of update tasks */
90 struct list_head qsd_upd_list;
92 /* r/w spinlock protecting:
94 * - the qsd update list
96 * - flags of the qsd_qtype_info */
99 /* Default quota settings which apply to all identifiers */
100 /* when blk qunit reaches this value, later write reqs from client
101 * should be sync. b=16642 */
102 unsigned long qsd_sync_threshold;
104 /* how long a service thread can wait for quota space.
105 * value dynamically computed from obd_timeout and at_max if not
106 * enforced here (via procfs) */
109 unsigned long qsd_is_md:1, /* managing quota for mdt */
110 qsd_started:1, /* instance is now started */
111 qsd_prepared:1, /* qsd_prepare() successfully
113 qsd_exp_valid:1,/* qsd_exp is now valid */
114 qsd_stopping:1, /* qsd_instance is stopping */
115 qsd_updating:1, /* qsd is updating record */
116 qsd_exclusive:1; /* upd exclusive with reint */
121 * Per-type quota information.
122 * Quota slave instance for a specific quota type. The qsd instance has one such
123 * structure for each quota type (i.e. user & group).
125 struct qsd_qtype_info {
126 /* reference count incremented by each user of this structure */
129 /* quota type, either USRQUOTA or GRPQUOTA
130 * immutable after creation. */
133 /* Global index FID to use for this quota type */
134 struct lu_fid qqi_fid;
136 /* Slave index FID allocated by the master */
137 struct lu_fid qqi_slv_fid;
139 /* back pointer to qsd device
140 * immutable after creation. */
141 struct qsd_instance *qqi_qsd;
143 /* handle of global quota lock */
144 struct lustre_handle qqi_lockh;
146 /* Local index files storing quota settings for this quota type */
147 struct dt_object *qqi_acct_obj; /* accounting object */
148 struct dt_object *qqi_slv_obj; /* slave index copy */
149 struct dt_object *qqi_glb_obj; /* global index copy */
151 /* Current object versions */
152 __u64 qqi_slv_ver; /* slave index version */
153 __u64 qqi_glb_ver; /* global index version */
155 /* per quota ID information. All lquota entry are kept in a hash table
156 * and read from disk on cache miss. */
157 struct lquota_site *qqi_site;
159 /* Reintegration thread */
160 struct task_struct *qqi_reint_task;
162 /* statistics on operations performed by this slave */
163 struct lprocfs_stats *qqi_stats;
165 /* deferred update for the global index copy */
166 struct list_head qqi_deferred_glb;
167 /* deferred update for the slave index copy */
168 struct list_head qqi_deferred_slv;
170 /* Various flags representing the current state of the slave for this
172 unsigned long qqi_glb_uptodate:1, /* global index uptodate
174 qqi_slv_uptodate:1, /* slave index uptodate
176 qqi_reint:1, /* in reintegration or not */
177 qqi_acct_failed:1; /* failed to setup acct */
179 /* A list of references to this instance, for debugging */
180 struct lu_ref qqi_reference;
182 /* default quota setting*/
183 __u64 qqi_default_hardlimit;
184 __u64 qqi_default_softlimit;
185 __u64 qqi_default_gracetime;
189 * Per-filesystem quota information
190 * Structure tracking quota enforcement status on a per-filesystem basis
193 /* filesystem name */
194 char qfs_name[MTI_NAME_MAXLEN];
196 /* what type of quota is enabled for each resource type. */
197 unsigned int qfs_enabled[LQUOTA_NR_RES];
199 /* list of all qsd_instance for this fs */
200 struct list_head qfs_qsd_list;
201 struct mutex qfs_mutex;
203 /* link to the global quota fsinfo list. */
204 struct list_head qfs_link;
206 /* reference count */
211 * Helper functions & prototypes
214 /* helper routine to find qsd_instance associated a lquota_entry */
215 static inline struct qsd_qtype_info *lqe2qqi(struct lquota_entry *lqe)
217 LASSERT(!lqe_is_master(lqe));
218 return (struct qsd_qtype_info *)lqe->lqe_site->lqs_parent;
221 /* qqi_getref/putref is used to track users of a qqi structure */
222 static inline void qqi_getref(struct qsd_qtype_info *qqi)
224 atomic_inc(&qqi->qqi_ref);
227 static inline void qqi_putref(struct qsd_qtype_info *qqi)
229 LASSERT(atomic_read(&qqi->qqi_ref) > 0);
230 atomic_dec(&qqi->qqi_ref);
233 #define QSD_RES_TYPE(qsd) ((qsd)->qsd_is_md ? LQUOTA_RES_MD : LQUOTA_RES_DT)
235 /* udpate record for slave & global index copy */
237 struct list_head qur_link; /* link into qsd_upd_list */
238 union lquota_id qur_qid;
239 union lquota_rec qur_rec;
240 struct qsd_qtype_info *qur_qqi;
241 struct lquota_entry *qur_lqe;
246 /* Common data shared by qsd-level handlers. This is allocated per-thread to
247 * reduce stack consumption. */
248 struct qsd_thread_info {
249 union lquota_rec qti_rec;
250 union lquota_id qti_id;
251 struct lu_fid qti_fid;
252 struct ldlm_res_id qti_resid;
253 struct ldlm_enqueue_info qti_einfo;
254 struct lustre_handle qti_lockh;
256 struct lquota_lvb qti_lvb;
258 struct quota_body qti_body;
259 struct idx_info qti_ii;
261 char qti_buf[MTI_NAME_MAXLEN];
264 extern struct lu_context_key qsd_thread_key;
267 struct qsd_thread_info *qsd_info(const struct lu_env *env)
269 return lu_env_info(env, &qsd_thread_key);
272 /* helper function to check whether a given quota type is enabled */
273 static inline int qsd_type_enabled(struct qsd_instance *qsd, int type)
277 LASSERT(qsd != NULL);
278 LASSERT(type < LL_MAXQUOTAS);
280 if (qsd->qsd_fsinfo == NULL)
283 pool = qsd->qsd_is_md ? LQUOTA_RES_MD : LQUOTA_RES_DT;
284 enabled = qsd->qsd_fsinfo->qfs_enabled[pool - LQUOTA_FIRST_RES];
286 return enabled & BIT(type);
289 /* helper function to set new qunit and compute associated qtune value */
290 static inline void qsd_set_qunit(struct lquota_entry *lqe, __u64 qunit)
292 if (lqe->lqe_qunit == qunit)
295 lqe->lqe_qunit = qunit;
297 /* With very large qunit support, we can't afford to have a static
298 * qtune value, e.g. with a 1PB qunit and qtune set to 50%, we would
299 * start pre-allocation when 512TB of free quota space remains.
300 * Therefore, we adapt qtune depending on the actual qunit value */
301 if (qunit == 0) /* if qunit is NULL */
302 lqe->lqe_qtune = 0; /* qtune = 0 */
303 else if (qunit == 1024) /* if 1MB or 1K inodes */
304 lqe->lqe_qtune = qunit >> 1; /* => 50% */
305 else if (qunit <= 1024 * 1024) /* up to 1GB or 1M inodes */
306 lqe->lqe_qtune = qunit >> 2; /* => 25% */
307 else if (qunit <= 4 * 1024 * 1024) /* up to 16GB or 16M inodes */
308 lqe->lqe_qtune = qunit >> 3; /* => 12.5% */
309 else /* above 4GB/4M */
310 lqe->lqe_qtune = 1024 * 1024; /* value capped to 1GB/1M */
312 LQUOTA_DEBUG(lqe, "changing qunit & qtune");
314 /* turn on pre-acquire when qunit is modified */
315 lqe->lqe_nopreacq = false;
318 /* helper function to set/clear edquot flag */
319 static inline void qsd_set_edquot(struct lquota_entry *lqe, bool edquot)
321 lqe->lqe_edquot = edquot;
323 lqe->lqe_edquot_time = ktime_get_seconds();
326 #define QSD_WB_INTERVAL 60 /* 60 seconds */
328 /* helper function calculating how long a service thread should be waiting for
330 static inline int qsd_wait_timeout(struct qsd_instance *qsd)
332 if (qsd->qsd_timeout != 0)
333 return qsd->qsd_timeout;
334 return min_t(int, at_max / 2, obd_timeout / 2);
338 extern const struct lquota_entry_operations qsd_lqe_ops;
339 int qsd_refresh_usage(const struct lu_env *, struct lquota_entry *);
340 int qsd_update_index(const struct lu_env *, struct qsd_qtype_info *,
341 union lquota_id *, bool, __u64, void *);
342 int qsd_update_lqe(const struct lu_env *, struct lquota_entry *, bool,
344 int qsd_write_version(const struct lu_env *, struct qsd_qtype_info *,
348 extern struct ldlm_enqueue_info qsd_glb_einfo;
349 extern struct ldlm_enqueue_info qsd_id_einfo;
350 void qsd_update_default_quota(struct qsd_qtype_info *qqi, __u64 hardlimit,
351 __u64 softlimit, __u64 gracetime);
352 int qsd_id_lock_match(struct lustre_handle *, struct lustre_handle *);
353 int qsd_id_lock_cancel(const struct lu_env *, struct lquota_entry *);
356 int qsd_start_reint_thread(struct qsd_qtype_info *);
357 void qsd_stop_reint_thread(struct qsd_qtype_info *);
360 typedef void (*qsd_req_completion_t) (const struct lu_env *,
361 struct qsd_qtype_info *,
362 struct quota_body *, struct quota_body *,
363 struct lustre_handle *,
364 struct lquota_lvb *, void *, int);
365 int qsd_send_dqacq(const struct lu_env *, struct obd_export *,
366 struct quota_body *, bool, qsd_req_completion_t,
367 struct qsd_qtype_info *, struct lustre_handle *,
368 struct lquota_entry *);
369 int qsd_intent_lock(const struct lu_env *, struct obd_export *,
370 struct quota_body *, bool, int, qsd_req_completion_t,
371 struct qsd_qtype_info *, struct lquota_lvb *, void *);
372 int qsd_fetch_index(const struct lu_env *, struct obd_export *,
373 struct idx_info *, unsigned int, struct page **, bool *);
375 /* qsd_writeback.c */
376 void qsd_bump_version(struct qsd_qtype_info *, __u64, bool);
377 void qsd_upd_schedule(struct qsd_qtype_info *, struct lquota_entry *,
378 union lquota_id *, union lquota_rec *, __u64, bool);
380 struct qsd_fsinfo *qsd_get_fsinfo(char *, bool);
381 void qsd_put_fsinfo(struct qsd_fsinfo *);
382 int qsd_config(char *valstr, char *fsname, int pool);
383 int qsd_process_config(struct lustre_cfg *);
386 int qsd_adjust(const struct lu_env *, struct lquota_entry *);
388 /* qsd_writeback.c */
389 void qsd_upd_schedule(struct qsd_qtype_info *, struct lquota_entry *,
390 union lquota_id *, union lquota_rec *, __u64, bool);
391 void qsd_bump_version(struct qsd_qtype_info *, __u64, bool);
392 int qsd_start_upd_thread(struct qsd_instance *);
393 void qsd_stop_upd_thread(struct qsd_instance *);
394 void qsd_adjust_schedule(struct lquota_entry *, bool, bool);
395 #endif /* _QSD_INTERNAL_H */