[Qemu-devel] [PATCH v13 6/6] fsdev: hmp interface for throttling

[Pradeep Jagadeesh <pradeepkiruvale@gmail.com>]

This patch introduces hmp interfaces for the fsdev
devices.

Signed-off-by: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
---
 hmp-commands-info.hx | 18 ++++++++++++++++
 hmp-commands.hx      | 19 ++++++++++++++++
 hmp.c                | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 hmp.h                |  4 ++++
 4 files changed, 102 insertions(+)

diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
index 4f1ece9..9e1a26f 100644
--- a/hmp-commands-info.hx
+++ b/hmp-commands-info.hx
@@ -84,6 +84,24 @@ STEXI
 Show block device statistics.
 ETEXI
 
+#if defined(CONFIG_VIRTFS)
+
+    {
+        .name       = "fsdev_iothrottle",
+        .args_type  = "",
+        .params     = "",
+        .help       = "show fsdev iothrottle information",
+        .cmd        = hmp_info_fsdev_iothrottle,
+    },
+
+#endif
+
+STEXI
+@item info fsdev_iothrottle
+@findex fsdev_iothrottle
+Show fsdev device throttle info.
+ETEXI
+
     {
         .name       = "block-jobs",
         .args_type  = "",
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 1941e19..aef9f79 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1680,6 +1680,25 @@ STEXI
 Change I/O throttle limits for a block drive to @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
 ETEXI
 
+#if defined(CONFIG_VIRTFS)
+
+    {
+        .name       = "fsdev_set_io_throttle",
+        .args_type  = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
+        .params     = "device bps bps_rd bps_wr iops iops_rd iops_wr",
+        .help       = "change I/O throttle limits for a fs devices",
+        .cmd        = hmp_fsdev_set_io_throttle,
+    },
+
+#endif
+
+STEXI
+@item fsdev_set_io_throttle @var{device} @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
+@findex fsdev_set_io_throttle
+Change I/O throttle limits for a fs devices to @var{bps} @var{bps_rd} @var{bps_wr} @var{iops} @var{iops_rd} @var{iops_wr}
+ETEXI
+
+
     {
         .name       = "set_password",
         .args_type  = "protocol:s,password:s,connected:s?",
diff --git a/hmp.c b/hmp.c
index 904fc4a..dc0dbf1 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1792,6 +1792,67 @@ void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)
     hmp_handle_error(mon, &err);
 }
 
+#ifdef CONFIG_VIRTFS
+
+void hmp_fsdev_set_io_throttle(Monitor *mon, const QDict *qdict)
+{
+    Error *err = NULL;
+    ThrottleLimits *tlimits;
+    FsdevIOThrottle throttle = {
+        .has_id = true,
+        .id = (char *) qdict_get_str(qdict, "device"),
+    };
+
+    tlimits = qapi_FsdevIOThrottle_base(&throttle);
+    hmp_initialize_throttle_limits(tlimits, qdict);
+    qmp_fsdev_set_io_throttle(&throttle, &err);
+    hmp_handle_error(mon, &err);
+}
+
+static void print_fsdev_throttle_config(Monitor *mon, FsdevIOThrottle *fscfg)
+{
+    monitor_printf(mon, "%s", fscfg->id);
+    monitor_printf(mon, "    I/O throttling:"
+                   " bps=%" PRId64
+                   " bps_rd=%" PRId64  " bps_wr=%" PRId64
+                   " bps_max=%" PRId64
+                   " bps_rd_max=%" PRId64
+                   " bps_wr_max=%" PRId64
+                   " iops=%" PRId64 " iops_rd=%" PRId64
+                   " iops_wr=%" PRId64
+                   " iops_max=%" PRId64
+                   " iops_rd_max=%" PRId64
+                   " iops_wr_max=%" PRId64
+                   " iops_size=%" PRId64
+                   "\n",
+                   fscfg->bps_total,
+                   fscfg->bps_read,
+                   fscfg->bps_write,
+                   fscfg->bps_total_max,
+                   fscfg->bps_read_max,
+                   fscfg->bps_write_max,
+                   fscfg->iops_total,
+                   fscfg->iops_read,
+                   fscfg->iops_write,
+                   fscfg->iops_total_max,
+                   fscfg->iops_read_max,
+                   fscfg->iops_write_max,
+                   fscfg->iops_size);
+}
+
+void hmp_info_fsdev_iothrottle(Monitor *mon, const QDict *qdict)
+{
+    FsdevIOThrottleList *fsdev_list, *info;
+    fsdev_list = qmp_query_fsdev_io_throttle(NULL);
+
+    for (info = fsdev_list; info; info = info->next) {
+        print_fsdev_throttle_config(mon, info->value);
+    }
+    qapi_free_FsdevIOThrottleList(fsdev_list);
+}
+
+#endif
+
 void hmp_block_stream(Monitor *mon, const QDict *qdict)
 {
     Error *error = NULL;
diff --git a/hmp.h b/hmp.h
index 3605003..5a06590 100644
--- a/hmp.h
+++ b/hmp.h
@@ -81,6 +81,10 @@ void hmp_set_password(Monitor *mon, const QDict *qdict);
 void hmp_expire_password(Monitor *mon, const QDict *qdict);
 void hmp_eject(Monitor *mon, const QDict *qdict);
 void hmp_change(Monitor *mon, const QDict *qdict);
+#ifdef CONFIG_VIRTFS
+void hmp_fsdev_set_io_throttle(Monitor *mon, const QDict *qdict);
+void hmp_info_fsdev_iothrottle(Monitor *mon, const QDict *qdict);
+#endif
 void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict);
 void hmp_block_stream(Monitor *mon, const QDict *qdict);
 void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict);
-- 
1.8.3.1