vircgroup: extract virCgroupV1(Allow|Deny)Device

Reviewed-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/util/vircgroup.c

@@ -1871,29 +1871,7 @@ int
 virCgroupAllowDevice(virCgroupPtr group, char type, int major, int minor,
                      int perms)
 {
-    VIR_AUTOFREE(char *) devstr = NULL;
-    VIR_AUTOFREE(char *) majorstr = NULL;
-    VIR_AUTOFREE(char *) minorstr = NULL;
-
-    if ((major < 0 && VIR_STRDUP(majorstr, "*") < 0) ||
-        (major >= 0 && virAsprintf(&majorstr, "%i", major) < 0))
-        return -1;
-
-    if ((minor < 0 && VIR_STRDUP(minorstr, "*") < 0) ||
-        (minor >= 0 && virAsprintf(&minorstr, "%i", minor) < 0))
-        return -1;
-
-    if (virAsprintf(&devstr, "%c %s:%s %s", type, majorstr, minorstr,
-                    virCgroupGetDevicePermsString(perms)) < 0)
-        return -1;
-
-    if (virCgroupSetValueStr(group,
-                             VIR_CGROUP_CONTROLLER_DEVICES,
-                             "devices.allow",
-                             devstr) < 0)
-        return -1;
-
-    return 0;
+    VIR_CGROUP_BACKEND_CALL(group, allowDevice, -1, type, major, minor, perms);
 }
 
 
@@ -1932,11 +1910,11 @@ virCgroupAllowDevicePath(virCgroupPtr group,
     if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
         return 1;
 
-    return virCgroupAllowDevice(group,
-                                S_ISCHR(sb.st_mode) ? 'c' : 'b',
-                                major(sb.st_rdev),
-                                minor(sb.st_rdev),
-                                perms);
+    VIR_CGROUP_BACKEND_CALL(group, allowDevice, -1,
+                            S_ISCHR(sb.st_mode) ? 'c' : 'b',
+                            major(sb.st_rdev),
+                            minor(sb.st_rdev),
+                            perms);
 }
 
 
@@ -1955,29 +1933,7 @@ int
 virCgroupDenyDevice(virCgroupPtr group, char type, int major, int minor,
                     int perms)
 {
-    VIR_AUTOFREE(char *) devstr = NULL;
-    VIR_AUTOFREE(char *) majorstr = NULL;
-    VIR_AUTOFREE(char *) minorstr = NULL;
-
-    if ((major < 0 && VIR_STRDUP(majorstr, "*") < 0) ||
-        (major >= 0 && virAsprintf(&majorstr, "%i", major) < 0))
-        return -1;
-
-    if ((minor < 0 && VIR_STRDUP(minorstr, "*") < 0) ||
-        (minor >= 0 && virAsprintf(&minorstr, "%i", minor) < 0))
-        return -1;
-
-    if (virAsprintf(&devstr, "%c %s:%s %s", type, majorstr, minorstr,
-                    virCgroupGetDevicePermsString(perms)) < 0)
-        return -1;
-
-    if (virCgroupSetValueStr(group,
-                             VIR_CGROUP_CONTROLLER_DEVICES,
-                             "devices.deny",
-                             devstr) < 0)
-        return -1;
-
-    return 0;
+    VIR_CGROUP_BACKEND_CALL(group, denyDevice, -1, type, major, minor, perms);
 }
 
 
@@ -2016,11 +1972,11 @@ virCgroupDenyDevicePath(virCgroupPtr group,
     if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
         return 1;
 
-    return virCgroupDenyDevice(group,
-                               S_ISCHR(sb.st_mode) ? 'c' : 'b',
-                               major(sb.st_rdev),
-                               minor(sb.st_rdev),
-                               perms);
+    VIR_CGROUP_BACKEND_CALL(group, denyDevice, -1,
+                            S_ISCHR(sb.st_mode) ? 'c' : 'b',
+                            major(sb.st_rdev),
+                            minor(sb.st_rdev),
+                            perms);
 }
 
 

src/util/vircgroupbackend.h

@@ -255,6 +255,20 @@ typedef int
 (*virCgroupGetMemSwapUsageCB)(virCgroupPtr group,
                               unsigned long long *kb);
 
+typedef int
+(*virCgroupAllowDeviceCB)(virCgroupPtr group,
+                          char type,
+                          int major,
+                          int minor,
+                          int perms);
+
+typedef int
+(*virCgroupDenyDeviceCB)(virCgroupPtr group,
+                         char type,
+                         int major,
+                         int minor,
+                         int perms);
+
 struct _virCgroupBackend {
     virCgroupBackendType type;
 
@@ -304,6 +318,9 @@ struct _virCgroupBackend {
     virCgroupSetMemSwapHardLimitCB setMemSwapHardLimit;
     virCgroupGetMemSwapHardLimitCB getMemSwapHardLimit;
     virCgroupGetMemSwapUsageCB getMemSwapUsage;
+
+    virCgroupAllowDeviceCB allowDevice;
+    virCgroupDenyDeviceCB denyDevice;
 };
 typedef struct _virCgroupBackend virCgroupBackend;
 typedef virCgroupBackend *virCgroupBackendPtr;

src/util/vircgroupv1.c

@@ -1670,6 +1670,72 @@ virCgroupV1GetMemSwapUsage(virCgroupPtr group,
 }
 
 
+static int
+virCgroupV1AllowDevice(virCgroupPtr group,
+                       char type,
+                       int major,
+                       int minor,
+                       int perms)
+{
+    VIR_AUTOFREE(char *) devstr = NULL;
+    VIR_AUTOFREE(char *) majorstr = NULL;
+    VIR_AUTOFREE(char *) minorstr = NULL;
+
+    if ((major < 0 && VIR_STRDUP(majorstr, "*") < 0) ||
+        (major >= 0 && virAsprintf(&majorstr, "%i", major) < 0))
+        return -1;
+
+    if ((minor < 0 && VIR_STRDUP(minorstr, "*") < 0) ||
+        (minor >= 0 && virAsprintf(&minorstr, "%i", minor) < 0))
+        return -1;
+
+    if (virAsprintf(&devstr, "%c %s:%s %s", type, majorstr, minorstr,
+                    virCgroupGetDevicePermsString(perms)) < 0)
+        return -1;
+
+    if (virCgroupSetValueStr(group,
+                             VIR_CGROUP_CONTROLLER_DEVICES,
+                             "devices.allow",
+                             devstr) < 0)
+        return -1;
+
+    return 0;
+}
+
+
+static int
+virCgroupV1DenyDevice(virCgroupPtr group,
+                      char type,
+                      int major,
+                      int minor,
+                      int perms)
+{
+    VIR_AUTOFREE(char *) devstr = NULL;
+    VIR_AUTOFREE(char *) majorstr = NULL;
+    VIR_AUTOFREE(char *) minorstr = NULL;
+
+    if ((major < 0 && VIR_STRDUP(majorstr, "*") < 0) ||
+        (major >= 0 && virAsprintf(&majorstr, "%i", major) < 0))
+        return -1;
+
+    if ((minor < 0 && VIR_STRDUP(minorstr, "*") < 0) ||
+        (minor >= 0 && virAsprintf(&minorstr, "%i", minor) < 0))
+        return -1;
+
+    if (virAsprintf(&devstr, "%c %s:%s %s", type, majorstr, minorstr,
+                    virCgroupGetDevicePermsString(perms)) < 0)
+        return -1;
+
+    if (virCgroupSetValueStr(group,
+                             VIR_CGROUP_CONTROLLER_DEVICES,
+                             "devices.deny",
+                             devstr) < 0)
+        return -1;
+
+    return 0;
+}
+
+
 virCgroupBackend virCgroupV1Backend = {
     .type = VIR_CGROUP_BACKEND_TYPE_V1,
 
@@ -1717,6 +1783,9 @@ virCgroupBackend virCgroupV1Backend = {
     .setMemSwapHardLimit = virCgroupV1SetMemSwapHardLimit,
     .getMemSwapHardLimit = virCgroupV1GetMemSwapHardLimit,
     .getMemSwapUsage = virCgroupV1GetMemSwapUsage,
+
+    .allowDevice = virCgroupV1AllowDevice,
+    .denyDevice = virCgroupV1DenyDevice,
 };