[libvirt PATCH 1/3] vircgroup: introduce virCgroupGetInode function
For new feature Fibre Channel VMID we will need to get inode of the
VM root cgroup as it is used in the new kernel API together with VMID.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/vircgroup.c | 37 +++++++++++++++++++++++++++++++++++++
src/util/vircgroup.h | 2 ++
3 files changed, 40 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 6961cdb137..d8451fcfff 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1920,6 +1920,7 @@ virCgroupGetCpuShares;
virCgroupGetDevicePermsString;
virCgroupGetDomainTotalCpuStats;
virCgroupGetFreezerState;
+virCgroupGetInode;
virCgroupGetMemoryHardLimit;
virCgroupGetMemorySoftLimit;
virCgroupGetMemoryStat;
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index 1b3b28342e..ea702e7b63 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -3973,3 +3973,40 @@ virCgroupGetCpuPeriodQuota(virCgroup *cgroup, unsigned long long
*period,
return 0;
}
+
+
+/**
+ * virCgroupGetInode:
+ *
+ * @cgroup: the cgroup to get inode for
+ *
+ * Get the @cgroup inode and return its value to the caller.
+ *
+ * Returns inode on success, -1 on error with error message reported.
+ */
+int
+virCgroupGetInode(virCgroup *cgroup)
+{
+ VIR_AUTOCLOSE fd = 0;
+ struct stat st;
+ int controller = virCgroupGetAnyController(cgroup);
+ g_autofree char *path = NULL;
+
+ if (controller < 0)
+ return -1;
+
+ if (virCgroupPathOfController(cgroup, controller, "", &path) < 0)
+ return -1;
+
+ if ((fd = open(path, O_RDONLY | O_NONBLOCK)) < 0) {
+ virReportSystemError(errno, _("failed to open cgroup '%s'"),
path);
+ return -1;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ virReportSystemError(errno, _("failed to get fstat for '%s'"),
path);
+ return -1;
+ }
+
+ return st.st_ino;
+}
diff --git a/src/util/vircgroup.h b/src/util/vircgroup.h
index 8002cac570..690f09465c 100644
--- a/src/util/vircgroup.h
+++ b/src/util/vircgroup.h
@@ -283,3 +283,5 @@ int virCgroupSetOwner(virCgroup *cgroup,
int virCgroupHasEmptyTasks(virCgroup *cgroup, int controller);
bool virCgroupControllerAvailable(int controller);
+
+int virCgroupGetInode(virCgroup *cgroup);
--
2.31.1