[libvirt] [PATCHv4 07/18] util: Refactor code for creating resctrl group
The code for creating resctrl allocation group could be reused
for monitoring group, refactor it for reusing in the later patch.
Signed-off-by: Wang Huaqiang <huaqiang.wang(a)intel.com>
---
src/util/virresctrl.c | 37 +++++++++++++++++++++++--------------
1 file changed, 23 insertions(+), 14 deletions(-)
diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index de10a0c..d573713 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -2312,6 +2312,26 @@ virResctrlAllocDeterminePath(virResctrlAllocPtr alloc,
}
+/* This function creates a resctrl directory in resource control file system,
+ * and the directory path is specified by @path. */
+static int
+virResctrlCreateGroupPath(const char *path)
+{
+ /* Directory exists, return */
+ if (virFileExists(path))
+ return 0;
+
+ if (virFileMakePath(path) < 0) {
+ virReportSystemError(errno,
+ _("Cannot create resctrl directory
'%s'"),
+ path);
+ return -1;
+ }
+
+ return 0;
+}
+
+
/* This checks if the directory for the alloc exists. If not it tries to create
* it and apply appropriate alloc settings. */
int
@@ -2336,13 +2356,6 @@ virResctrlAllocCreate(virResctrlInfoPtr resctrl,
if (virResctrlAllocDeterminePath(alloc, machinename) < 0)
return -1;
- if (virFileExists(alloc->path)) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("Path '%s' for resctrl allocation exists"),
- alloc->path);
- goto cleanup;
- }
-
lockfd = virResctrlLockWrite();
if (lockfd < 0)
goto cleanup;
@@ -2350,6 +2363,9 @@ virResctrlAllocCreate(virResctrlInfoPtr resctrl,
if (virResctrlAllocAssign(resctrl, alloc) < 0)
goto cleanup;
+ if (virResctrlCreateGroupPath(alloc->path) < 0)
+ goto cleanup;
+
alloc_str = virResctrlAllocFormat(alloc);
if (!alloc_str)
goto cleanup;
@@ -2357,13 +2373,6 @@ virResctrlAllocCreate(virResctrlInfoPtr resctrl,
if (virAsprintf(&schemata_path, "%s/schemata", alloc->path) < 0)
goto cleanup;
- if (virFileMakePath(alloc->path) < 0) {
- virReportSystemError(errno,
- _("Cannot create resctrl directory
'%s'"),
- alloc->path);
- goto cleanup;
- }
-
VIR_DEBUG("Writing resctrl schemata '%s' into '%s'",
alloc_str, schemata_path);
if (virFileWriteStr(schemata_path, alloc_str, 0) < 0) {
rmdir(alloc->path);
--
2.7.4