LU-14762 lmv: compare space to mkdir on parent MDT

[fs/lustre-release.git] / lustre / include / lu_object.h

diff --git a/lustre/include/lu_object.h b/lustre/include/lu_object.h
index 1ec8dd6..fe35671 100644 (file)
--- a/lustre/include/lu_object.h
+++ b/lustre/include/lu_object.h
@@ -39,7 +39,6 @@
 #include <linux/percpu_counter.h>
 #include <linux/rhashtable.h>
 #include <linux/ctype.h>
-#include <obd_target.h>
 
 struct seq_file;
 struct proc_dir_entry;
@@ -1519,6 +1518,23 @@ static inline bool lu_object_is_cl(const struct lu_object *o)
        return lu_device_is_cl(o->lo_dev);
 }
 
+/* Generic subset of tgts */
+struct lu_tgt_pool {
+       __u32              *op_array;   /* array of index of
+                                        * lov_obd->lov_tgts
+                                        */
+       unsigned int        op_count;   /* number of tgts in the array */
+       unsigned int        op_size;    /* allocated size of op_array */
+       struct rw_semaphore op_rw_sem;  /* to protect lu_tgt_pool use */
+};
+
+int lu_tgt_pool_init(struct lu_tgt_pool *op, unsigned int count);
+int lu_tgt_pool_add(struct lu_tgt_pool *op, __u32 idx, unsigned int min_count);
+int lu_tgt_pool_remove(struct lu_tgt_pool *op, __u32 idx);
+int lu_tgt_pool_free(struct lu_tgt_pool *op);
+int lu_tgt_check_index(int idx, struct lu_tgt_pool *osts);
+int lu_tgt_pool_extend(struct lu_tgt_pool *op, unsigned int min_count);
+
 /* bitflags used in rr / qos allocation */
 enum lq_flag {
        LQ_DIRTY        = 0, /* recalc qos data */
@@ -1551,7 +1567,7 @@ struct lu_svr_qos {
        struct obd_uuid          lsq_uuid;      /* ptlrpc's c_remote_uuid */
        struct list_head         lsq_svr_list;  /* link to lq_svr_list */
        __u64                    lsq_bavail;    /* total bytes avail on svr */
-       __u64                    lsq_iavail;    /* tital inode avail on svr */
+       __u64                    lsq_iavail;    /* total inode avail on svr */
        __u64                    lsq_penalty;   /* current penalty */
        __u64                    lsq_penalty_per_obj; /* penalty decrease
                                                       * every obj*/
@@ -1566,12 +1582,19 @@ struct lu_tgt_qos {
        __u64                    ltq_penalty;   /* current penalty */
        __u64                    ltq_penalty_per_obj; /* penalty decrease
                                                       * every obj*/
+       __u64                    ltq_avail;     /* bytes/inode avail */
        __u64                    ltq_weight;    /* net weighting */
        time64_t                 ltq_used;      /* last used time, seconds */
        bool                     ltq_usable:1;  /* usable for striping */
 };
 
 /* target descriptor */
+#define LOV_QOS_DEF_THRESHOLD_RR_PCT   17
+#define LMV_QOS_DEF_THRESHOLD_RR_PCT   5
+
+#define LOV_QOS_DEF_PRIO_FREE          90
+#define LMV_QOS_DEF_PRIO_FREE          90
+
 struct lu_tgt_desc {
        union {
                struct dt_device        *ltd_tgt;
@@ -1661,11 +1684,33 @@ int lu_tgt_descs_init(struct lu_tgt_descs *ltd, bool is_mdt);
 void lu_tgt_descs_fini(struct lu_tgt_descs *ltd);
 int ltd_add_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
 void ltd_del_tgt(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt);
-bool ltd_qos_is_usable(struct lu_tgt_descs *ltd);
 int ltd_qos_penalties_calc(struct lu_tgt_descs *ltd);
 int ltd_qos_update(struct lu_tgt_descs *ltd, struct lu_tgt_desc *tgt,
                   __u64 *total_wt);
 
+/**
+ * Whether MDT inode and space usages are balanced.
+ */
+static inline bool ltd_qos_is_balanced(struct lu_tgt_descs *ltd)
+{
+       return !test_bit(LQ_DIRTY, &ltd->ltd_qos.lq_flags) &&
+              test_bit(LQ_SAME_SPACE, &ltd->ltd_qos.lq_flags);
+}
+
+/**
+ * Whether QoS data is up-to-date and QoS can be applied.
+ */
+static inline bool ltd_qos_is_usable(struct lu_tgt_descs *ltd)
+{
+       if (ltd_qos_is_balanced(ltd))
+               return false;
+
+       if (ltd->ltd_lov_desc.ld_active_tgt_count < 2)
+               return false;
+
+       return true;
+}
+
 static inline struct lu_tgt_desc *ltd_first_tgt(struct lu_tgt_descs *ltd)
 {
        int index;