[libvirt] [PATCH RESEND 1/7] LXC: Setup disks for container on host side
Gao feng
gaofeng at cn.fujitsu.com
Tue Jul 16 02:00:00 UTC 2013
Since mknod in container is forbidden, we should setup disks
on host side.
Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
src/lxc/lxc_container.c | 98 ------------------------------------------------
src/lxc/lxc_controller.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 94 insertions(+), 98 deletions(-)
diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index fcd9b74..caad02b 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -1367,100 +1367,6 @@ static int lxcContainerMountAllFS(virDomainDefPtr vmDef,
}
-static int lxcContainerSetupDisk(virDomainDefPtr vmDef,
- virDomainDiskDefPtr def,
- virSecurityManagerPtr securityDriver)
-{
- char *src = NULL;
- char *dst = NULL;
- int ret = -1;
- struct stat sb;
- mode_t mode;
- char *tmpsrc = def->src;
-
- if (def->type != VIR_DOMAIN_DISK_TYPE_BLOCK) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("Can't setup disk for non-block device"));
- goto cleanup;
- }
- if (def->src == NULL) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("Can't setup disk without media"));
- goto cleanup;
- }
-
- if (virAsprintf(&src, "/.oldroot/%s", def->src) < 0)
- goto cleanup;
-
- if (virAsprintf(&dst, "/dev/%s", def->dst) < 0)
- goto cleanup;
-
- if (stat(src, &sb) < 0) {
- virReportSystemError(errno,
- _("Unable to access %s"), def->src);
- goto cleanup;
- }
-
- if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode)) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("Disk source %s must be a character/block device"),
- def->src);
- goto cleanup;
- }
-
- mode = 0700;
- if (S_ISCHR(sb.st_mode))
- mode |= S_IFCHR;
- else
- mode |= S_IFBLK;
-
- /* Yes, the device name we're creating may not
- * actually correspond to the major:minor number
- * we're using, but we've no other option at this
- * time. Just have to hope that containerized apps
- * don't get upset that the major:minor is different
- * to that normally implied by the device name
- */
- VIR_DEBUG("Creating dev %s (%d,%d) from %s",
- dst, major(sb.st_rdev), minor(sb.st_rdev), src);
- if (mknod(dst, mode, sb.st_rdev) < 0) {
- virReportSystemError(errno,
- _("Unable to create device %s"),
- dst);
- goto cleanup;
- }
- /* Labelling normally operates on src, but we need
- * to actally label the dst here, so hack the config */
- def->src = dst;
- if (virSecurityManagerSetImageLabel(securityDriver, vmDef, def) < 0)
- goto cleanup;
-
- ret = 0;
-
-cleanup:
- def->src = tmpsrc;
- VIR_FREE(src);
- VIR_FREE(dst);
- return ret;
-}
-
-static int lxcContainerSetupAllDisks(virDomainDefPtr vmDef,
- virSecurityManagerPtr securityDriver)
-{
- size_t i;
- VIR_DEBUG("Setting up disks");
-
- for (i = 0; i < vmDef->ndisks; i++) {
- if (lxcContainerSetupDisk(vmDef, vmDef->disks[i],
- securityDriver) < 0)
- return -1;
- }
-
- VIR_DEBUG("Setup all disks");
- return 0;
-}
-
-
static int lxcContainerSetupHostdevSubsysUSB(virDomainDefPtr vmDef,
virDomainHostdevDefPtr def,
virSecurityManagerPtr securityDriver)
@@ -1837,10 +1743,6 @@ static int lxcContainerSetupPivotRoot(virDomainDefPtr vmDef,
if (lxcContainerMountAllFS(vmDef, sec_mount_options) < 0)
goto cleanup;
- /* Sets up any extra disks from guest config */
- if (lxcContainerSetupAllDisks(vmDef, securityDriver) < 0)
- goto cleanup;
-
/* Sets up any extra host devices from guest config */
if (lxcContainerSetupAllHostdevs(vmDef, securityDriver) < 0)
goto cleanup;
diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index 3f3d93b..e9d2848 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -1309,6 +1309,97 @@ cleanup:
}
+static int virLXCControllerSetupDisk(virLXCControllerPtr ctrl,
+ virDomainDiskDefPtr def,
+ virSecurityManagerPtr securityDriver)
+{
+ char *dst = NULL;
+ int ret = -1;
+ struct stat sb;
+ mode_t mode;
+ char *tmpsrc = def->src;
+
+ if (def->type != VIR_DOMAIN_DISK_TYPE_BLOCK) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Can't setup disk for non-block device"));
+ goto cleanup;
+ }
+ if (def->src == NULL) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Can't setup disk without media"));
+ goto cleanup;
+ }
+
+ if (virAsprintf(&dst, "/%s/%s.dev/%s",
+ LXC_STATE_DIR, ctrl->def->name, def->dst) < 0)
+ goto cleanup;
+
+ if (stat(def->src, &sb) < 0) {
+ virReportSystemError(errno,
+ _("Unable to access %s"), def->src);
+ goto cleanup;
+ }
+
+ if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Disk source %s must be a character/block device"),
+ def->src);
+ goto cleanup;
+ }
+
+ mode = 0700;
+ if (S_ISCHR(sb.st_mode))
+ mode |= S_IFCHR;
+ else
+ mode |= S_IFBLK;
+
+ /* Yes, the device name we're creating may not
+ * actually correspond to the major:minor number
+ * we're using, but we've no other option at this
+ * time. Just have to hope that containerized apps
+ * don't get upset that the major:minor is different
+ * to that normally implied by the device name
+ */
+ VIR_DEBUG("Creating dev %s (%d,%d) from %s",
+ dst, major(sb.st_rdev), minor(sb.st_rdev), def->src);
+ if (mknod(dst, mode, sb.st_rdev) < 0) {
+ virReportSystemError(errno,
+ _("Unable to create device %s"),
+ dst);
+ goto cleanup;
+ }
+
+ /* Labelling normally operates on src, but we need
+ * to actally label the dst here, so hack the config */
+ def->src = dst;
+ if (virSecurityManagerSetImageLabel(securityDriver, ctrl->def, def) < 0)
+ goto cleanup;
+
+ ret = 0;
+
+cleanup:
+ def->src = tmpsrc;
+ VIR_FREE(dst);
+ return ret;
+}
+
+static int virLXCControllerSetupAllDisks(virLXCControllerPtr ctrl)
+{
+ size_t i;
+ VIR_DEBUG("Setting up disks");
+
+ for (i = 0; i < ctrl->def->ndisks; i++) {
+ if (virLXCControllerSetupDisk(ctrl, ctrl->def->disks[i],
+ ctrl->securityManager) < 0)
+ return -1;
+ }
+
+ VIR_DEBUG("Setup all disks");
+ return 0;
+}
+
+
+
/**
* virLXCControllerMoveInterfaces
* @nveths: number of interfaces
@@ -1724,6 +1815,9 @@ virLXCControllerRun(virLXCControllerPtr ctrl)
if (virLXCControllerPopulateDevices(ctrl) < 0)
goto cleanup;
+ if (virLXCControllerSetupAllDisks(ctrl) < 0)
+ goto cleanup;
+
if (virLXCControllerSetupFuse(ctrl) < 0)
goto cleanup;
--
1.8.3.1
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