[PATCHv7 05/18] util: Refactor code for adding PID to the resource group

[Wang Huaqiang <huaqiang.wang@xxxxxxxxx>]

The code of adding PID to the allocation could be reused, refactor it
for later reuse.

Signed-off-by: Wang Huaqiang <huaqiang.wang@xxxxxxxxx>
---
 src/util/virresctrl.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index 1d0eb01..5fc8772 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -2390,26 +2390,21 @@ virResctrlAllocCreate(virResctrlInfoPtr resctrl,
 }
 
 
-int
-virResctrlAllocAddPID(virResctrlAllocPtr alloc,
-                      pid_t pid)
+static int
+virResctrlAddPID(const char *path,
+                 pid_t pid)
 {
     char *tasks = NULL;
     char *pidstr = NULL;
     int ret = 0;
 
-    /* If the allocation is empty, then it is impossible to add a PID to
-     * allocation  due to lacking of its 'tasks' file. Just return */
-    if (virResctrlAllocIsEmpty(alloc))
-        return 0;
-
-    if (!alloc->path) {
+    if (!path) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                       _("Cannot add pid to non-existing resctrl allocation"));
+                       _("Cannot add pid to non-existing resctrl group"));
         return -1;
     }
 
-    if (virAsprintf(&tasks, "%s/tasks", alloc->path) < 0)
+    if (virAsprintf(&tasks, "%s/tasks", path) < 0)
         return -1;
 
     if (virAsprintf(&pidstr, "%lld", (long long int) pid) < 0)
@@ -2431,6 +2426,19 @@ virResctrlAllocAddPID(virResctrlAllocPtr alloc,
 
 
 int
+virResctrlAllocAddPID(virResctrlAllocPtr alloc,
+                      pid_t pid)
+{
+    /* If allocation is empty, then no resctrl directory and the 'tasks' file
+     * exists, just return */
+    if (virResctrlAllocIsEmpty(alloc))
+        return 0;
+
+    return virResctrlAddPID(alloc->path, pid);
+}
+
+
+int
 virResctrlAllocRemove(virResctrlAllocPtr alloc)
 {
     int ret = 0;
-- 
2.7.4

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