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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
37 * A QSD instance implements quota enforcement support for a given OSD.
38 * The instance can be created via qsd_init() and then freed with qsd_fini().
39 * This structure gathers all quota parameters and pointers to on-disk indexes
40 * required on quota slave to:
41 * i. acquire/release quota space from the QMT;
42 * ii. allocate this quota space to local requests.
45 /* name of service which created this qsd instance */
46 char qsd_svname[MAX_OBD_NAME];
48 /* dt_device associated with this qsd instance */
49 struct dt_device *qsd_dev;
51 /* procfs directory where information related to the underlying slaves
53 struct proc_dir_entry *qsd_proc;
55 /* export used for the connection to quota master */
56 struct obd_export *qsd_exp;
58 /* ldlm namespace used for quota locks */
59 struct ldlm_namespace *qsd_ns;
61 /* on-disk directory where to store index files for this qsd instance */
62 struct dt_object *qsd_root;
64 /* We create 2 quota slave instances:
65 * - one for user quota
66 * - one for group quota
68 * This will have to be revisited if new quota types are added in the
69 * future. For the time being, we can just use an array. */
70 struct qsd_qtype_info *qsd_type_array[LL_MAXQUOTAS];
72 /* per-filesystem quota information */
73 struct qsd_fsinfo *qsd_fsinfo;
75 /* link into qfs_qsd_list of qfs_fsinfo */
76 struct list_head qsd_link;
78 /* list of lqe entry which might need quota space adjustment */
79 struct list_head qsd_adjust_list;
81 /* lock protecting adjust list */
82 spinlock_t qsd_adjust_lock;
84 /* dedicated thread for updating slave index files. */
85 struct ptlrpc_thread qsd_upd_thread;
87 /* list of update tasks */
88 struct list_head qsd_upd_list;
90 /* r/w spinlock protecting:
92 * - the qsd update list
94 * - flags of the qsd_qtype_info */
97 /* Default quota settings which apply to all identifiers */
98 /* when blk qunit reaches this value, later write reqs from client
99 * should be sync. b=16642 */
100 unsigned long qsd_sync_threshold;
102 /* how long a service thread can wait for quota space.
103 * value dynamically computed from obd_timeout and at_max if not
104 * enforced here (via procfs) */
107 unsigned long qsd_is_md:1, /* managing quota for mdt */
108 qsd_started:1, /* instance is now started */
109 qsd_prepared:1, /* qsd_prepare() successfully
111 qsd_exp_valid:1,/* qsd_exp is now valid */
112 qsd_stopping:1; /* qsd_instance is stopping */
117 * Per-type quota information.
118 * Quota slave instance for a specific quota type. The qsd instance has one such
119 * structure for each quota type (i.e. user & group).
121 struct qsd_qtype_info {
122 /* reference count incremented by each user of this structure */
125 /* quota type, either USRQUOTA or GRPQUOTA
126 * immutable after creation. */
129 /* Global index FID to use for this quota type */
130 struct lu_fid qqi_fid;
132 /* Slave index FID allocated by the master */
133 struct lu_fid qqi_slv_fid;
135 /* back pointer to qsd device
136 * immutable after creation. */
137 struct qsd_instance *qqi_qsd;
139 /* handle of global quota lock */
140 struct lustre_handle qqi_lockh;
142 /* Local index files storing quota settings for this quota type */
143 struct dt_object *qqi_acct_obj; /* accounting object */
144 struct dt_object *qqi_slv_obj; /* slave index copy */
145 struct dt_object *qqi_glb_obj; /* global index copy */
147 /* Current object versions */
148 __u64 qqi_slv_ver; /* slave index version */
149 __u64 qqi_glb_ver; /* global index version */
151 /* per quota ID information. All lquota entry are kept in a hash table
152 * and read from disk on cache miss. */
153 struct lquota_site *qqi_site;
155 /* Reintegration thread */
156 struct ptlrpc_thread qqi_reint_thread;
158 /* statistics on operations performed by this slave */
159 struct lprocfs_stats *qqi_stats;
161 /* deferred update for the global index copy */
162 struct list_head qqi_deferred_glb;
163 /* deferred update for the slave index copy */
164 struct list_head qqi_deferred_slv;
166 /* Various flags representing the current state of the slave for this
168 unsigned long qqi_glb_uptodate:1, /* global index uptodate
170 qqi_slv_uptodate:1, /* slave index uptodate
172 qqi_reint:1, /* in reintegration or not */
173 qqi_acct_failed:1; /* failed to setup acct */
175 /* A list of references to this instance, for debugging */
176 struct lu_ref qqi_reference;
178 /* default quota setting*/
179 __u64 qqi_default_hardlimit;
180 __u64 qqi_default_softlimit;
181 __u64 qqi_default_gracetime;
185 * Per-filesystem quota information
186 * Structure tracking quota enforcement status on a per-filesystem basis
189 /* filesystem name */
190 char qfs_name[MTI_NAME_MAXLEN];
192 /* what type of quota is enabled for each resource type. */
193 unsigned int qfs_enabled[LQUOTA_NR_RES];
195 /* list of all qsd_instance for this fs */
196 struct list_head qfs_qsd_list;
197 struct mutex qfs_mutex;
199 /* link to the global quota fsinfo list. */
200 struct list_head qfs_link;
202 /* reference count */
207 * Helper functions & prototypes
210 /* helper routine to find qsd_instance associated a lquota_entry */
211 static inline struct qsd_qtype_info *lqe2qqi(struct lquota_entry *lqe)
213 LASSERT(!lqe_is_master(lqe));
214 return (struct qsd_qtype_info *)lqe->lqe_site->lqs_parent;
217 /* qqi_getref/putref is used to track users of a qqi structure */
218 static inline void qqi_getref(struct qsd_qtype_info *qqi)
220 atomic_inc(&qqi->qqi_ref);
223 static inline void qqi_putref(struct qsd_qtype_info *qqi)
225 LASSERT(atomic_read(&qqi->qqi_ref) > 0);
226 atomic_dec(&qqi->qqi_ref);
229 #define QSD_RES_TYPE(qsd) ((qsd)->qsd_is_md ? LQUOTA_RES_MD : LQUOTA_RES_DT)
231 /* udpate record for slave & global index copy */
233 struct list_head qur_link; /* link into qsd_upd_list */
234 union lquota_id qur_qid;
235 union lquota_rec qur_rec;
236 struct qsd_qtype_info *qur_qqi;
237 struct lquota_entry *qur_lqe;
242 /* Common data shared by qsd-level handlers. This is allocated per-thread to
243 * reduce stack consumption. */
244 struct qsd_thread_info {
245 union lquota_rec qti_rec;
246 union lquota_id qti_id;
247 struct lu_fid qti_fid;
248 struct ldlm_res_id qti_resid;
249 struct ldlm_enqueue_info qti_einfo;
250 struct lustre_handle qti_lockh;
252 struct lquota_lvb qti_lvb;
254 struct quota_body qti_body;
255 struct idx_info qti_ii;
257 char qti_buf[MTI_NAME_MAXLEN];
260 extern struct lu_context_key qsd_thread_key;
263 struct qsd_thread_info *qsd_info(const struct lu_env *env)
265 struct qsd_thread_info *info;
267 info = lu_context_key_get(&env->le_ctx, &qsd_thread_key);
269 lu_env_refill((struct lu_env *)env);
270 info = lu_context_key_get(&env->le_ctx, &qsd_thread_key);
276 /* helper function to check whether a given quota type is enabled */
277 static inline int qsd_type_enabled(struct qsd_instance *qsd, int type)
281 LASSERT(qsd != NULL);
282 LASSERT(type < LL_MAXQUOTAS);
284 if (qsd->qsd_fsinfo == NULL)
287 pool = qsd->qsd_is_md ? LQUOTA_RES_MD : LQUOTA_RES_DT;
288 enabled = qsd->qsd_fsinfo->qfs_enabled[pool - LQUOTA_FIRST_RES];
290 return enabled & (1 << type);
293 /* helper function to set new qunit and compute associated qtune value */
294 static inline void qsd_set_qunit(struct lquota_entry *lqe, __u64 qunit)
296 if (lqe->lqe_qunit == qunit)
299 lqe->lqe_qunit = qunit;
301 /* With very large qunit support, we can't afford to have a static
302 * qtune value, e.g. with a 1PB qunit and qtune set to 50%, we would
303 * start pre-allocation when 512TB of free quota space remains.
304 * Therefore, we adapt qtune depending on the actual qunit value */
305 if (qunit == 0) /* if qunit is NULL */
306 lqe->lqe_qtune = 0; /* qtune = 0 */
307 else if (qunit == 1024) /* if 1MB or 1K inodes */
308 lqe->lqe_qtune = qunit >> 1; /* => 50% */
309 else if (qunit <= 1024 * 1024) /* up to 1GB or 1M inodes */
310 lqe->lqe_qtune = qunit >> 2; /* => 25% */
311 else if (qunit <= 4 * 1024 * 1024) /* up to 16GB or 16M inodes */
312 lqe->lqe_qtune = qunit >> 3; /* => 12.5% */
313 else /* above 4GB/4M */
314 lqe->lqe_qtune = 1024 * 1024; /* value capped to 1GB/1M */
316 LQUOTA_DEBUG(lqe, "changing qunit & qtune");
318 /* turn on pre-acquire when qunit is modified */
319 lqe->lqe_nopreacq = false;
322 /* helper function to set/clear edquot flag */
323 static inline void qsd_set_edquot(struct lquota_entry *lqe, bool edquot)
325 lqe->lqe_edquot = edquot;
327 lqe->lqe_edquot_time = ktime_get_seconds();
330 #define QSD_WB_INTERVAL 60 /* 60 seconds */
332 /* helper function calculating how long a service thread should be waiting for
334 static inline int qsd_wait_timeout(struct qsd_instance *qsd)
336 if (qsd->qsd_timeout != 0)
337 return qsd->qsd_timeout;
338 return min_t(int, at_max / 2, obd_timeout / 2);
342 extern struct lquota_entry_operations qsd_lqe_ops;
343 int qsd_refresh_usage(const struct lu_env *, struct lquota_entry *);
344 int qsd_update_index(const struct lu_env *, struct qsd_qtype_info *,
345 union lquota_id *, bool, __u64, void *);
346 int qsd_update_lqe(const struct lu_env *, struct lquota_entry *, bool,
348 int qsd_write_version(const struct lu_env *, struct qsd_qtype_info *,
352 extern struct ldlm_enqueue_info qsd_glb_einfo;
353 extern struct ldlm_enqueue_info qsd_id_einfo;
354 void qsd_update_default_quota(struct qsd_qtype_info *qqi, __u64 hardlimit,
355 __u64 softlimit, __u64 gracetime);
356 int qsd_id_lock_match(struct lustre_handle *, struct lustre_handle *);
357 int qsd_id_lock_cancel(const struct lu_env *, struct lquota_entry *);
360 int qsd_start_reint_thread(struct qsd_qtype_info *);
361 void qsd_stop_reint_thread(struct qsd_qtype_info *);
364 typedef void (*qsd_req_completion_t) (const struct lu_env *,
365 struct qsd_qtype_info *,
366 struct quota_body *, struct quota_body *,
367 struct lustre_handle *,
368 struct lquota_lvb *, void *, int);
369 int qsd_send_dqacq(const struct lu_env *, struct obd_export *,
370 struct quota_body *, bool, qsd_req_completion_t,
371 struct qsd_qtype_info *, struct lustre_handle *,
372 struct lquota_entry *);
373 int qsd_intent_lock(const struct lu_env *, struct obd_export *,
374 struct quota_body *, bool, int, qsd_req_completion_t,
375 struct qsd_qtype_info *, struct lquota_lvb *, void *);
376 int qsd_fetch_index(const struct lu_env *, struct obd_export *,
377 struct idx_info *, unsigned int, struct page **, bool *);
379 /* qsd_writeback.c */
380 void qsd_bump_version(struct qsd_qtype_info *, __u64, bool);
381 void qsd_upd_schedule(struct qsd_qtype_info *, struct lquota_entry *,
382 union lquota_id *, union lquota_rec *, __u64, bool);
384 struct qsd_fsinfo *qsd_get_fsinfo(char *, bool);
385 void qsd_put_fsinfo(struct qsd_fsinfo *);
386 int qsd_config(char *valstr, char *fsname, int pool);
387 int qsd_process_config(struct lustre_cfg *);
390 int qsd_adjust(const struct lu_env *, struct lquota_entry *);
392 /* qsd_writeback.c */
393 void qsd_upd_schedule(struct qsd_qtype_info *, struct lquota_entry *,
394 union lquota_id *, union lquota_rec *, __u64, bool);
395 void qsd_bump_version(struct qsd_qtype_info *, __u64, bool);
396 int qsd_start_upd_thread(struct qsd_instance *);
397 void qsd_stop_upd_thread(struct qsd_instance *);
398 void qsd_adjust_schedule(struct lquota_entry *, bool, bool);
399 #endif /* _QSD_INTERNAL_H */