From 31b3584b2d16cac1f6ddd3d4b51616795f935a41 Mon Sep 17 00:00:00 2001
From: Julio Faracco <jcfaracco@gmail.com>
Date: Wed, 14 Nov 2018 15:25:45 -0200
Subject: [PATCH] lxc: Include support to lxc version 3.0 or higher.

This patch introduce the new settings for LXC 3.0 or higher. The older
versions keep the compatibility to deprecated settings for LXC, but
after release 3.0, the compatibility was removed. This commit adds the
support to the refactored settings.

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
---
 src/lxc/lxc_native.c | 52 ++++++++++++++++++++++++++++++++------------
 1 file changed, 38 insertions(+), 14 deletions(-)

diff --git a/src/lxc/lxc_native.c b/src/lxc/lxc_native.c
index cbdec723dd..9f6d4b3de8 100644
--- a/src/lxc/lxc_native.c
+++ b/src/lxc/lxc_native.c
@@ -200,8 +200,13 @@ lxcSetRootfs(virDomainDefPtr def,
     int type = VIR_DOMAIN_FS_TYPE_MOUNT;
     VIR_AUTOFREE(char *) value = NULL;
 
-    if (virConfGetValueString(properties, "lxc.rootfs", &value) <= 0)
-        return -1;
+    if (virConfGetValueString(properties, "lxc.rootfs.path", &value) <= 0) {
+        virResetLastError();
+
+        /* Check for pre LXC 3.0 legacy key */
+        if (virConfGetValueString(properties, "lxc.rootfs", &value) <= 0)
+            return -1;
+    }
 
     if (STRPREFIX(value, "/dev/"))
         type = VIR_DOMAIN_FS_TYPE_BLOCK;
@@ -684,8 +689,13 @@ lxcCreateConsoles(virDomainDefPtr def, virConfPtr properties)
     virDomainChrDefPtr console;
     size_t i;
 
-    if (virConfGetValueString(properties, "lxc.tty", &value) <= 0)
-        return 0;
+    if (virConfGetValueString(properties, "lxc.tty.max", &value) <= 0) {
+        virResetLastError();
+
+        /* Check for pre LXC 3.0 legacy key */
+        if (virConfGetValueString(properties, "lxc.tty", &value) <= 0)
+            return 0;
+    }
 
     if (virStrToLong_i(value, NULL, 10, &nbttys) < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR, _("failed to parse int: '%s'"),
@@ -724,13 +734,16 @@ lxcIdmapWalkCallback(const char *name, virConfValuePtr value, void *data)
     char type;
     unsigned long start, target, count;
 
-    if (STRNEQ(name, "lxc.id_map") || !value->str)
-        return 0;
+    /* LXC 3.0 uses "lxc.idmap", while legacy used "lxc.id_map" */
+    if (STRNEQ(name, "lxc.idmap") || !value->str) {
+        if (!value->str || STRNEQ(name, "lxc.id_map"))
+            return 0;
+    }
 
     if (sscanf(value->str, "%c %lu %lu %lu", &type,
                &target, &start, &count) != 4) {
-        virReportError(VIR_ERR_INTERNAL_ERROR, _("invalid lxc.id_map: '%s'"),
-                       value->str);
+        virReportError(VIR_ERR_INTERNAL_ERROR, _("invalid %s: '%s'"),
+                       name, value->str);
         return -1;
     }
 
@@ -1041,19 +1054,30 @@ lxcParseConfigString(const char *config,
     if (VIR_STRDUP(vmdef->os.init, "/sbin/init") < 0)
         goto error;
 
-    if (virConfGetValueString(properties, "lxc.utsname", &value) <= 0 ||
-        VIR_STRDUP(vmdef->name, value) < 0)
+    if (virConfGetValueString(properties, "lxc.uts.name", &value) <= 0) {
+        virResetLastError();
+
+        /* Check for pre LXC 3.0 legacy key */
+        if (virConfGetValueString(properties, "lxc.utsname", &value) <= 0)
+            goto error;
+    }
+
+    if (VIR_STRDUP(vmdef->name, value) < 0)
         goto error;
+
     if (!vmdef->name && (VIR_STRDUP(vmdef->name, "unnamed") < 0))
         goto error;
 
     if (lxcSetRootfs(vmdef, properties) < 0)
         goto error;
 
-    /* Look for fstab: we shouldn't have it */
-    if (virConfGetValue(properties, "lxc.mount")) {
+    /* LXC 3.0 uses "lxc.mount.fstab", while legacy used just "lxc.mount".
+     * In either case, generate the error to use "lxc.mount.entry" instead */
+    if (virConfGetValue(properties, "lxc.mount.fstab") ||
+        virConfGetValue(properties, "lxc.mount")) {
         virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
-                       _("lxc.mount found, use lxc.mount.entry lines instead"));
+                       _("lxc.mount.fstab or lxc.mount found, use "
+                         "lxc.mount.entry lines instead"));
         goto error;
     }
 
@@ -1069,7 +1093,7 @@ lxcParseConfigString(const char *config,
     if (lxcCreateConsoles(vmdef, properties) < 0)
         goto error;
 
-    /* lxc.id_map */
+    /* lxc.idmap or legacy lxc.id_map */
     if (virConfWalk(properties, lxcIdmapWalkCallback, vmdef) < 0)
         goto error;