Thin add lv_thin_pool_transaction_id

Easy function to get transaction_id status value.

diff --git a/WHATS_NEW b/WHATS_NEW
index 3c962fdca98e7898c168c333af36ec493a7036c7..2c08d6215b856fe47f3450245ccf9d20c729226d 100644 (file)
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.89 - 
 ==================================
+  Add lv_thin_pool_transaction_id to read the transaction_id value.
   Use suspend|resume_origin_only when up-converting RAID, as mirrors do.
   Fix the way RAID meta LVs are added to the dependency tree.
   Change exclusive LV activation logic to try local node before remote nodes.

diff --git a/lib/activate/activate.c b/lib/activate/activate.c
index b647407757715736277ecd480dcfc4193d873938..67d0cc3ce3d62c9ff828a6abcc305ffc5d662138 100644 (file)
--- a/lib/activate/activate.c
+++ b/lib/activate/activate.c
@@ -762,6 +762,35 @@ int lv_thin_percent(const struct logical_volume *lv,
        return r;
 }
 
+/*
+ * Returns 1 if transaction_id set, else 0 on failure.
+ */
+int lv_thin_pool_transaction_id(const struct logical_volume *lv,
+                               uint64_t *transaction_id)
+{
+       int r;
+       struct dev_manager *dm;
+       struct dm_status_thin_pool *status;
+
+       if (!activation())
+               return 0;
+
+       log_debug("Checking thin percent for LV %s/%s",
+                 lv->vg->name, lv->name);
+
+       if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
+               return_0;
+
+       if (!(r = dev_manager_thin_pool_status(dm, lv, &status)))
+               stack;
+       else
+               *transaction_id = status->transaction_id;
+
+       dev_manager_destroy(dm);
+
+       return r;
+}
+
 static int _lv_active(struct cmd_context *cmd, struct logical_volume *lv)
 {
        struct lvinfo info;

diff --git a/lib/activate/activate.h b/lib/activate/activate.h
index d053eefd869875ec52365bee7a482307288e4971..9029b8da42608937c869f3d685b1555a5ffccd3a 100644 (file)
--- a/lib/activate/activate.h
+++ b/lib/activate/activate.h
@@ -105,6 +105,8 @@ int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
                         percent_t *percent);
 int lv_thin_percent(const struct logical_volume *lv, int mapped,
                    percent_t *percent);
+int lv_thin_pool_transaction_id(const struct logical_volume *lv,
+                               uint64_t *transaction_id);
 
 /*
  * Return number of LVs in the VG that are active.

diff --git a/lib/activate/dev_manager.c b/lib/activate/dev_manager.c
index f1744d9385994f3248c9dc861f896bf57fea1ddb..3b8bd5855c47fbd06622db80edc352086742ef81 100644 (file)
--- a/lib/activate/dev_manager.c
+++ b/lib/activate/dev_manager.c
@@ -882,6 +882,48 @@ static int _belong_to_vg(const char *vgname, const char *name)
 
 #endif
 
+int dev_manager_thin_pool_status(struct dev_manager *dm,
+                                const struct logical_volume *lv,
+                                struct dm_status_thin_pool **status)
+{
+       const char *dlid;
+       struct dm_task *dmt;
+       struct dm_info info;
+       uint64_t start, length;
+       char *type = NULL;
+       char *params = NULL;
+       int r = 0;
+
+       /* Build dlid for the thin pool layer */
+       if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, _thin_layer)))
+               return_0;
+
+       log_debug("Getting thin pool device status for %s.", lv->name);
+
+       if (!(dmt = _setup_task(NULL, dlid, 0, DM_DEVICE_STATUS, 0, 0)))
+               return_0;
+
+       if (!dm_task_no_open_count(dmt))
+               log_error("Failed to disable open_count.");
+
+       if (!dm_task_run(dmt))
+               goto_out;
+
+       if (!dm_task_get_info(dmt, &info) || !info.exists)
+               goto_out;
+
+       dm_get_next_target(dmt, NULL, &start, &length, &type, &params);
+
+       if (!dm_get_status_thin_pool(dm->mem, params, status))
+               goto_out;
+
+       r = 1;
+out:
+       dm_task_destroy(dmt);
+
+       return r;
+}
+
 int dev_manager_thin_pool_percent(struct dev_manager *dm,
                                  const struct logical_volume *lv,
                                  int metadata, percent_t *percent)

diff --git a/lib/activate/dev_manager.h b/lib/activate/dev_manager.h
index e3c73493e1375a3d2c6f8f89da64f06b40621996..2d1b7451c4becedb820b934450d7b7aa2beb8c1c 100644 (file)
--- a/lib/activate/dev_manager.h
+++ b/lib/activate/dev_manager.h
@@ -54,6 +54,9 @@ int dev_manager_snapshot_percent(struct dev_manager *dm,
 int dev_manager_mirror_percent(struct dev_manager *dm,
                               const struct logical_volume *lv, int wait,
                               percent_t *percent, uint32_t *event_nr);
+int dev_manager_thin_pool_status(struct dev_manager *dm,
+                                const struct logical_volume *lv,
+                                struct dm_status_thin_pool **status);
 int dev_manager_thin_pool_percent(struct dev_manager *dm,
                                  const struct logical_volume *lv,
                                  int metadata, percent_t *percent);