[libvirt] [PATCH v4 5/6] qemu: add bps_max and friends to qemu command generation

[Matthias Gatto]

Check the arability of the options with the current qemu binary, add them in the varable opt if yes,
print a message if not.

Signed-off-by: Matthias Gatto <matthias.gatto at outscale.com>
---
 src/qemu/qemu_command.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 56 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index eb72451..c3530f9 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3665,12 +3665,32 @@ qemuBuildDriveStr(virConnectPtr conn,
         goto error;
     }
 
+    /* block I/O throttling 1.7 */
+    if ((disk->blkdeviotune.total_bytes_sec_max ||
+         disk->blkdeviotune.read_bytes_sec_max ||
+         disk->blkdeviotune.write_bytes_sec_max ||
+         disk->blkdeviotune.total_iops_sec_max ||
+         disk->blkdeviotune.read_iops_sec_max ||
+         disk->blkdeviotune.write_iops_sec_max) &&
+        !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DRIVE_IOTUNE_MAX)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("there is some block I/O throttling paramater that are not supported with this "
+                         "QEMU binary(need QEMU 1.7 or superior)"));
+        goto error;
+    }
+
     if (disk->blkdeviotune.total_bytes_sec > LLONG_MAX ||
         disk->blkdeviotune.read_bytes_sec > LLONG_MAX ||
         disk->blkdeviotune.write_bytes_sec > LLONG_MAX ||
         disk->blkdeviotune.total_iops_sec > LLONG_MAX ||
         disk->blkdeviotune.read_iops_sec > LLONG_MAX ||
-        disk->blkdeviotune.write_iops_sec > LLONG_MAX) {
+        disk->blkdeviotune.write_iops_sec > LLONG_MAX ||
+        disk->blkdeviotune.total_bytes_sec_max > LLONG_MAX ||
+        disk->blkdeviotune.read_bytes_sec_max > LLONG_MAX ||
+        disk->blkdeviotune.write_bytes_sec_max > LLONG_MAX ||
+        disk->blkdeviotune.total_iops_sec_max > LLONG_MAX ||
+        disk->blkdeviotune.read_iops_sec_max > LLONG_MAX ||
+        disk->blkdeviotune.write_iops_sec_max > LLONG_MAX) {
         virReportError(VIR_ERR_OVERFLOW,
                       _("block I/O throttle limit must "
                         "be less than %llu using QEMU"), LLONG_MAX);
@@ -3707,6 +3727,41 @@ qemuBuildDriveStr(virConnectPtr conn,
                           disk->blkdeviotune.write_iops_sec);
     }
 
+    if (disk->blkdeviotune.total_bytes_sec_max) {
+        virBufferAsprintf(&opt, ",bps_max=%llu",
+                          disk->blkdeviotune.total_bytes_sec_max);
+    }
+
+    if (disk->blkdeviotune.read_bytes_sec_max) {
+        virBufferAsprintf(&opt, ",bps_rd_max=%llu",
+                          disk->blkdeviotune.read_bytes_sec_max);
+    }
+
+    if (disk->blkdeviotune.write_bytes_sec_max) {
+        virBufferAsprintf(&opt, ",bps_wr_max=%llu",
+                          disk->blkdeviotune.write_bytes_sec_max);
+    }
+
+    if (disk->blkdeviotune.total_iops_sec_max) {
+        virBufferAsprintf(&opt, ",iops_max=%llu",
+                          disk->blkdeviotune.total_iops_sec_max);
+    }
+
+    if (disk->blkdeviotune.read_iops_sec_max) {
+        virBufferAsprintf(&opt, ",iops_rd_max=%llu",
+                          disk->blkdeviotune.read_iops_sec_max);
+    }
+
+    if (disk->blkdeviotune.write_iops_sec_max) {
+        virBufferAsprintf(&opt, ",iops_wr_max=%llu",
+                          disk->blkdeviotune.write_iops_sec_max);
+    }
+
+    if (disk->blkdeviotune.write_iops_sec_max) {
+        virBufferAsprintf(&opt, ",iops_size=%llu",
+                          disk->blkdeviotune.size_iops_sec);
+    }
+
     if (virBufferCheckError(&opt) < 0)
         goto error;
 
-- 
1.8.3.1