[libvirt] [PATCH 1/2] LXC: hostdev: introduce lxcContainerSetupHostdevCapsMakePath

[Gao feng]

This helper function is used to create parent directroy for
the hostdev which will be added to the container. if the
parent directory of this hostdev doesn't exist, the mknod of
the hostdev will fail.

Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
 src/lxc/lxc_container.c | 17 +++++++++++++++++
 src/lxc/lxc_container.h |  2 ++
 2 files changed, 19 insertions(+)

diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index c8420db..b954107 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -1544,6 +1544,23 @@ cleanup:
 }
 
 
+int lxcContainerSetupHostdevCapsMakePath(char *dev)
+{
+    int ret = 0;
+    char *dir = NULL;
+
+    if ((dir = strrchr(dev, '/'))) {
+        *dir = '\0';
+        if ((virFileMakePath(dev) < 0) && (errno != EEXIST))
+            ret = -1;
+
+        *dir = '/';
+    }
+
+    return ret;
+}
+
+
 static int lxcContainerSetupHostdevCapsStorage(virDomainDefPtr vmDef ATTRIBUTE_UNUSED,
                                                virDomainHostdevDefPtr def ATTRIBUTE_UNUSED,
                                                virSecurityManagerPtr securityDriver ATTRIBUTE_UNUSED)
diff --git a/src/lxc/lxc_container.h b/src/lxc/lxc_container.h
index ada72f7..f168703 100644
--- a/src/lxc/lxc_container.h
+++ b/src/lxc/lxc_container.h
@@ -63,6 +63,8 @@ int lxcContainerStart(virDomainDefPtr def,
 
 int lxcContainerAvailable(int features);
 
+int lxcContainerSetupHostdevCapsMakePath(char *dev);
+
 virArch lxcContainerGetAlt32bitArch(virArch arch);
 
 #endif /* LXC_CONTAINER_H */
-- 
1.8.3.1