[libvirt] [PATCH 11/15] Move /dev/pts setup out of virLXCControllerRun
Daniel P. Berrange
berrange at redhat.com
Tue Jul 3 15:58:50 UTC 2012
From: "Daniel P. Berrange" <berrange at redhat.com>
The virLXCControllerRun method is getting a little too large,
and about 50% of its code is related to setting up a /dev/pts
mount. Move the latter out into a dedicated method
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/lxc/lxc_controller.c | 229 ++++++++++++++++++++++++++--------------------
1 file changed, 128 insertions(+), 101 deletions(-)
diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index af8a936..1ae53de 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -119,6 +119,7 @@ struct _virLXCController {
size_t nconsoles;
virLXCControllerConsolePtr consoles;
+ char *devptmx;
size_t nloopDevs;
int *loopDevFds;
@@ -236,6 +237,8 @@ static void virLXCControllerFree(virLXCControllerPtr ctrl)
VIR_FORCE_CLOSE(ctrl->handshakeFd);
+ VIR_FREE(ctrl->devptmx);
+
virDomainDefFree(ctrl->def);
VIR_FREE(ctrl->name);
@@ -1544,45 +1547,27 @@ cleanup:
return ret;
}
+
static int
-virLXCControllerRun(virLXCControllerPtr ctrl,
- int monitor,
- int client)
+virLXCControllerSetupDevPTS(virLXCControllerPtr ctrl)
{
- int rc = -1;
- int control[2] = { -1, -1};
- int containerhandshake[2] = { -1, -1 };
- char **containerTTYPaths = NULL;
- virDomainFSDefPtr root;
- char *devpts = NULL;
- char *devptmx = NULL;
- size_t i;
+ virDomainFSDefPtr root = virDomainGetRootFilesystem(ctrl->def);
char *mount_options = NULL;
+ char *opts;
+ char *devpts = NULL;
+ int ret = -1;
- if (VIR_ALLOC_N(containerTTYPaths, ctrl->nconsoles) < 0) {
- virReportOOMError();
- goto cleanup;
- }
-
- if (socketpair(PF_UNIX, SOCK_STREAM, 0, control) < 0) {
- virReportSystemError(errno, "%s",
- _("sockpair failed"));
- goto cleanup;
- }
-
- if (socketpair(PF_UNIX, SOCK_STREAM, 0, containerhandshake) < 0) {
- virReportSystemError(errno, "%s",
- _("socketpair failed"));
- goto cleanup;
+ if (!root) {
+ if (ctrl->nconsoles != 1) {
+ lxcError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("Expected exactly one console, but got %zu"),
+ ctrl->nconsoles);
+ return -1;
+ }
+ return 0;
}
- if (virLXCControllerSetupLoopDevices(ctrl) < 0)
- goto cleanup;
-
- root = virDomainGetRootFilesystem(ctrl->def);
-
- if (lxcSetContainerResources(ctrl->def) < 0)
- goto cleanup;
+ VIR_DEBUG("Setting up private /dev/pts");
/*
* If doing a chroot style setup, we need to prepare
@@ -1604,85 +1589,87 @@ virLXCControllerRun(virLXCControllerPtr ctrl,
* into slave mode, just in case it was currently
* marked as shared
*/
- if (root) {
- mount_options = virSecurityManagerGetMountOptions(ctrl->securityManager,
- ctrl->def);
- char *opts;
- VIR_DEBUG("Setting up private /dev/pts");
+ mount_options = virSecurityManagerGetMountOptions(ctrl->securityManager,
+ ctrl->def);
- if (!virFileExists(root->src)) {
- virReportSystemError(errno,
- _("root source %s does not exist"),
- root->src);
- goto cleanup;
- }
+ if (!virFileExists(root->src)) {
+ virReportSystemError(errno,
+ _("root source %s does not exist"),
+ root->src);
+ goto cleanup;
+ }
- if (unshare(CLONE_NEWNS) < 0) {
- virReportSystemError(errno, "%s",
- _("Cannot unshare mount namespace"));
- goto cleanup;
- }
+ if (unshare(CLONE_NEWNS) < 0) {
+ virReportSystemError(errno, "%s",
+ _("Cannot unshare mount namespace"));
+ goto cleanup;
+ }
- if (mount("", "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
- virReportSystemError(errno, "%s",
- _("Failed to switch root mount into slave mode"));
- goto cleanup;
- }
+ if (mount("", "/", NULL, MS_SLAVE|MS_REC, NULL) < 0) {
+ virReportSystemError(errno, "%s",
+ _("Failed to switch root mount into slave mode"));
+ goto cleanup;
+ }
- if (virAsprintf(&devpts, "%s/dev/pts", root->src) < 0 ||
- virAsprintf(&devptmx, "%s/dev/pts/ptmx", root->src) < 0) {
- virReportOOMError();
- goto cleanup;
- }
+ if (virAsprintf(&devpts, "%s/dev/pts", root->src) < 0 ||
+ virAsprintf(&ctrl->devptmx, "%s/dev/pts/ptmx", root->src) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
- if (virFileMakePath(devpts) < 0) {
- virReportSystemError(errno,
- _("Failed to make path %s"),
- devpts);
- goto cleanup;
- }
+ if (virFileMakePath(devpts) < 0) {
+ virReportSystemError(errno,
+ _("Failed to make path %s"),
+ devpts);
+ goto cleanup;
+ }
- /* XXX should we support gid=X for X!=5 for distros which use
- * a different gid for tty? */
- if (virAsprintf(&opts, "newinstance,ptmxmode=0666,mode=0620,gid=5%s",
- (mount_options ? mount_options : "")) < 0) {
- virReportOOMError();
- goto cleanup;
- }
+ /* XXX should we support gid=X for X!=5 for distros which use
+ * a different gid for tty? */
+ if (virAsprintf(&opts, "newinstance,ptmxmode=0666,mode=0620,gid=5%s",
+ (mount_options ? mount_options : "")) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
- VIR_DEBUG("Mount devpts on %s type=tmpfs flags=%x, opts=%s",
- devpts, MS_NOSUID, opts);
- if (mount("devpts", devpts, "devpts", MS_NOSUID, opts) < 0) {
- VIR_FREE(opts);
- virReportSystemError(errno,
- _("Failed to mount devpts on %s"),
- devpts);
- goto cleanup;
- }
- VIR_FREE(opts);
+ VIR_DEBUG("Mount devpts on %s type=tmpfs flags=%x, opts=%s",
+ devpts, MS_NOSUID, opts);
+ if (mount("devpts", devpts, "devpts", MS_NOSUID, opts) < 0) {
+ virReportSystemError(errno,
+ _("Failed to mount devpts on %s"),
+ devpts);
+ goto cleanup;
+ }
- if (access(devptmx, R_OK) < 0) {
- VIR_WARN("Kernel does not support private devpts, using shared devpts");
- VIR_FREE(devptmx);
- }
- } else {
- if (ctrl->nconsoles != 1) {
- lxcError(VIR_ERR_CONFIG_UNSUPPORTED,
- _("Expected exactly one console, but got %zu"),
- ctrl->nconsoles);
- goto cleanup;
- }
+ if (access(ctrl->devptmx, R_OK) < 0) {
+ VIR_WARN("Kernel does not support private devpts, using shared devpts");
+ VIR_FREE(ctrl->devptmx);
}
+ ret = 0;
+
+cleanup:
+ VIR_FREE(opts);
+ VIR_FREE(devpts);
+ return ret;
+}
+
+
+static int
+virLXCControllerSetupConsoles(virLXCControllerPtr ctrl,
+ char **containerTTYPaths)
+{
+ size_t i;
+
for (i = 0 ; i < ctrl->nconsoles ; i++) {
- if (devptmx) {
- VIR_DEBUG("Opening tty on private %s", devptmx);
- if (lxcCreateTty(devptmx,
+ if (ctrl->devptmx) {
+ VIR_DEBUG("Opening tty on private %s", ctrl->devptmx);
+ if (lxcCreateTty(ctrl->devptmx,
&ctrl->consoles[i].contFd,
&containerTTYPaths[i]) < 0) {
virReportSystemError(errno, "%s",
_("Failed to allocate tty"));
- goto cleanup;
+ return -1;
}
} else {
VIR_DEBUG("Opening tty on shared /dev/ptmx");
@@ -1691,10 +1678,53 @@ virLXCControllerRun(virLXCControllerPtr ctrl,
0) < 0) {
virReportSystemError(errno, "%s",
_("Failed to allocate tty"));
- goto cleanup;
+ return -1;
}
}
}
+ return 0;
+}
+
+
+static int
+virLXCControllerRun(virLXCControllerPtr ctrl,
+ int monitor,
+ int client)
+{
+ int rc = -1;
+ int control[2] = { -1, -1};
+ int containerhandshake[2] = { -1, -1 };
+ char **containerTTYPaths = NULL;
+ size_t i;
+
+ if (VIR_ALLOC_N(containerTTYPaths, ctrl->nconsoles) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, control) < 0) {
+ virReportSystemError(errno, "%s",
+ _("sockpair failed"));
+ goto cleanup;
+ }
+
+ if (socketpair(PF_UNIX, SOCK_STREAM, 0, containerhandshake) < 0) {
+ virReportSystemError(errno, "%s",
+ _("socketpair failed"));
+ goto cleanup;
+ }
+
+ if (virLXCControllerSetupLoopDevices(ctrl) < 0)
+ goto cleanup;
+
+ if (lxcSetContainerResources(ctrl->def) < 0)
+ goto cleanup;
+
+ if (virLXCControllerSetupDevPTS(ctrl) < 0)
+ goto cleanup;
+
+ if (virLXCControllerSetupConsoles(ctrl, containerTTYPaths) < 0)
+ goto cleanup;
if (lxcSetPersonality(ctrl->def) < 0)
goto cleanup;
@@ -1753,9 +1783,6 @@ virLXCControllerRun(virLXCControllerPtr ctrl,
monitor = client = -1;
cleanup:
- VIR_FREE(mount_options);
- VIR_FREE(devptmx);
- VIR_FREE(devpts);
VIR_FORCE_CLOSE(control[0]);
VIR_FORCE_CLOSE(control[1]);
VIR_FORCE_CLOSE(containerhandshake[0]);
--
1.7.10.4
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