LU-1842 quota: add per-filesystem information

[fs/lustre-release.git] / lustre / quota / qsd_internal.h

diff --git a/lustre/quota/qsd_internal.h b/lustre/quota/qsd_internal.h
index c829588..f37a5a8 100644 (file)
--- a/lustre/quota/qsd_internal.h
+++ b/lustre/quota/qsd_internal.h
@@ -31,6 +31,7 @@
 #define _QSD_INTERNAL_H
 
 struct qsd_type_info;
+struct qsd_fsinfo;
 
 /*
  * A QSD instance implements quota enforcement support for a given OSD.
@@ -73,7 +74,13 @@ struct qsd_instance {
         *
         * probably way too much :(
         */
-       cfs_rwlock_t             qsd_lock;
+       cfs_rwlock_t             qsd_lock;
+
+       /* per-filesystem quota information */
+       struct qsd_fsinfo       *qsd_fsinfo;
+
+       /* link into qfs_qsd_list of qfs_fsinfo */
+       cfs_list_t               qsd_link;
 
        unsigned long            qsd_is_md:1,    /* managing quota for mdt */
                                 qsd_stopping:1; /* qsd_instance is stopping */
@@ -124,6 +131,28 @@ struct qsd_qtype_info {
 };
 
 /*
+ * Per-filesystem quota information
+ * Structure tracking quota enforcement status on a per-filesystem basis
+ */
+struct qsd_fsinfo {
+       /* filesystem name */
+       char                    qfs_name[MTI_NAME_MAXLEN];
+
+       /* what type of quota is enabled for each resource type. */
+       unsigned int            qfs_enabled[LQUOTA_NR_RES];
+
+       /* list of all qsd_instance for this fs */
+       cfs_list_t              qfs_qsd_list;
+       cfs_semaphore_t         qfs_sem;
+
+       /* link to the global quota fsinfo list.  */
+       cfs_list_t              qfs_link;
+
+       /* reference count */
+       int                     qfs_ref;
+};
+
+/*
  * Helper functions & prototypes
  */
 
@@ -190,6 +219,24 @@ struct qsd_thread_info *qsd_info(const struct lu_env *env)
        return info;
 }
 
+/* helper function to check whether a given quota type is enabled */
+static inline int qsd_type_enabled(struct qsd_instance *qsd, int type)
+{
+       int     enabled, pool;
+
+       LASSERT(qsd != NULL);
+       LASSERT(type < MAXQUOTAS);
+
+       if (qsd->qsd_fsinfo == NULL)
+               return 0;
+
+       pool = qsd->qsd_is_md ? LQUOTA_RES_MD : LQUOTA_RES_DT;
+       enabled = qsd->qsd_fsinfo->qfs_enabled[pool - LQUOTA_FIRST_RES];
+
+       return enabled & (1 << type);
+}
+
+/* helper function to set new qunit and compute associated qtune value */
 static inline void qsd_set_qunit(struct lquota_entry *lqe, __u64 qunit)
 {
        if (lqe->lqe_qunit == qunit)
@@ -258,6 +305,10 @@ int qsd_fetch_index(const struct lu_env *, struct obd_export *,
 void qsd_bump_version(struct qsd_qtype_info *, __u64, bool);
 void qsd_upd_schedule(struct qsd_qtype_info *, struct lquota_entry *,
                      union lquota_id *, union lquota_rec *, __u64, bool);
+/* qsd_config.c */
+struct qsd_fsinfo *qsd_get_fsinfo(char *, bool);
+void qsd_put_fsinfo(struct qsd_fsinfo *);
+int qsd_process_config(struct lustre_cfg *);
 
 /* qsd_handler.c */
 /* XXX to be replaced with real function once qsd_handler landed */