[libvirt] [PATCH 1/2] qemu: Keep QEMU host drive prefix in BlkIoTune

[Stefan Hajnoczi]

The QEMU -drive id= begins with libvirt's QEMU host drive prefix
("drive-"), which is stripped off in several places two convert between
host ("-drive") and guest ("-device") device names.

In the case of BlkIoTune it is unnecessary to strip the QEMU host drive
prefix because we operate on "info block"/"query-block" output that uses
host drive names.

Stripping the prefix incorrectly caused string comparisons to fail since
we were comparing the guest device name against the host device name.

Signed-off-by: Stefan Hajnoczi <stefanha at redhat.com>
---
 src/qemu/qemu_monitor_json.c | 3 ---
 src/qemu/qemu_monitor_text.c | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 9a1f2dc..e0faacf 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3739,9 +3739,6 @@ qemuMonitorJSONBlockIoThrottleInfo(virJSONValuePtr result,
             goto cleanup;
         }
 
-       if(STRPREFIX(current_dev, QEMU_DRIVE_HOST_PREFIX))
-            current_dev += strlen(QEMU_DRIVE_HOST_PREFIX);
-
         if (STREQ(current_dev, device))
             continue;
 
diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 09f2a92..0e46fd9 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -3193,9 +3193,6 @@ qemuMonitorTextParseBlockIoThrottle(const char *result,
     p = result;
 
     while (*p) {
-        if (STRPREFIX(p, QEMU_DRIVE_HOST_PREFIX))
-            p += strlen(QEMU_DRIVE_HOST_PREFIX);
-
         if (STREQLEN(p, device, devnamelen) &&
             p[devnamelen] == ':' && p[devnamelen+1] == ' ') {
 
-- 
1.7.12.1