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-rw-r--r--src/nspawn/nspawn-cgroup.c13
-rw-r--r--src/nspawn/nspawn-cgroup.h6
-rw-r--r--src/nspawn/nspawn-mount.c42
-rw-r--r--src/nspawn/nspawn-mount.h6
-rw-r--r--src/nspawn/nspawn.c26
5 files changed, 58 insertions, 35 deletions
diff --git a/src/nspawn/nspawn-cgroup.c b/src/nspawn/nspawn-cgroup.c
index ea3cab513c..aa0da04955 100644
--- a/src/nspawn/nspawn-cgroup.c
+++ b/src/nspawn/nspawn-cgroup.c
@@ -20,7 +20,6 @@
#include <sys/mount.h>
#include "alloc-util.h"
-#include "cgroup-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "mkdir.h"
@@ -63,18 +62,18 @@ int chown_cgroup(pid_t pid, uid_t uid_shift) {
return 0;
}
-int sync_cgroup(pid_t pid, bool unified_requested) {
+int sync_cgroup(pid_t pid, CGroupUnified unified_requested) {
_cleanup_free_ char *cgroup = NULL;
char tree[] = "/tmp/unifiedXXXXXX", pid_string[DECIMAL_STR_MAX(pid) + 1];
bool undo_mount = false;
const char *fn;
int unified, r;
- unified = cg_all_unified();
+ unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
if (unified < 0)
return log_error_errno(unified, "Failed to determine whether the unified hierarchy is used: %m");
- if ((unified > 0) == unified_requested)
+ if ((unified > 0) == (unified_requested >= CGROUP_UNIFIED_SYSTEMD))
return 0;
/* When the host uses the legacy cgroup setup, but the
@@ -117,7 +116,7 @@ finish:
return r;
}
-int create_subcgroup(pid_t pid, bool unified_requested) {
+int create_subcgroup(pid_t pid, CGroupUnified unified_requested) {
_cleanup_free_ char *cgroup = NULL;
const char *child;
int unified, r;
@@ -129,10 +128,10 @@ int create_subcgroup(pid_t pid, bool unified_requested) {
* did not create a scope unit for the container move us and
* the container into two separate subcgroups. */
- if (!unified_requested)
+ if (unified_requested == CGROUP_UNIFIED_NONE)
return 0;
- unified = cg_all_unified();
+ unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
if (unified < 0)
return log_error_errno(unified, "Failed to determine whether the unified hierarchy is used: %m");
if (unified == 0)
diff --git a/src/nspawn/nspawn-cgroup.h b/src/nspawn/nspawn-cgroup.h
index 1ff35a299a..dc33da8abe 100644
--- a/src/nspawn/nspawn-cgroup.h
+++ b/src/nspawn/nspawn-cgroup.h
@@ -22,6 +22,8 @@
#include <stdbool.h>
#include <sys/types.h>
+#include "cgroup-util.h"
+
int chown_cgroup(pid_t pid, uid_t uid_shift);
-int sync_cgroup(pid_t pid, bool unified_requested);
-int create_subcgroup(pid_t pid, bool unified_requested);
+int sync_cgroup(pid_t pid, CGroupUnified unified_requested);
+int create_subcgroup(pid_t pid, CGroupUnified unified_requested);
diff --git a/src/nspawn/nspawn-mount.c b/src/nspawn/nspawn-mount.c
index b5d83d481a..295b75341f 100644
--- a/src/nspawn/nspawn-mount.c
+++ b/src/nspawn/nspawn-mount.c
@@ -21,7 +21,6 @@
#include <linux/magic.h>
#include "alloc-util.h"
-#include "cgroup-util.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
@@ -661,7 +660,8 @@ static int get_controllers(Set *subsystems) {
return 0;
}
-static int mount_legacy_cgroup_hierarchy(const char *dest, const char *controller, const char *hierarchy, bool read_only) {
+static int mount_legacy_cgroup_hierarchy(const char *dest, const char *controller, const char *hierarchy,
+ CGroupUnified unified_requested, bool read_only) {
char *to;
int r;
@@ -677,7 +677,15 @@ static int mount_legacy_cgroup_hierarchy(const char *dest, const char *controlle
/* The superblock mount options of the mount point need to be
* identical to the hosts', and hence writable... */
- if (mount("cgroup", to, "cgroup", MS_NOSUID|MS_NOEXEC|MS_NODEV, controller) < 0)
+ if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) {
+ if (unified_requested >= CGROUP_UNIFIED_SYSTEMD)
+ r = mount("cgroup", to, "cgroup2", MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
+ else
+ r = mount("cgroup", to, "cgroup", MS_NOSUID|MS_NOEXEC|MS_NODEV, "none,name=systemd,xattr");
+ } else
+ r = mount("cgroup", to, "cgroup", MS_NOSUID|MS_NOEXEC|MS_NODEV, controller);
+
+ if (r < 0)
return log_error_errno(errno, "Failed to mount to %s: %m", to);
/* ... hence let's only make the bind mount read-only, not the
@@ -691,8 +699,8 @@ static int mount_legacy_cgroup_hierarchy(const char *dest, const char *controlle
/* Mount a legacy cgroup hierarchy when cgroup namespaces are supported. */
static int mount_legacy_cgns_supported(
- bool userns, uid_t uid_shift, uid_t uid_range,
- const char *selinux_apifs_context) {
+ CGroupUnified unified_requested, bool userns, uid_t uid_shift,
+ uid_t uid_range, const char *selinux_apifs_context) {
_cleanup_set_free_free_ Set *controllers = NULL;
const char *cgroup_root = "/sys/fs/cgroup", *c;
int r;
@@ -739,7 +747,7 @@ static int mount_legacy_cgns_supported(
if (!controller)
break;
- r = mount_legacy_cgroup_hierarchy("", controller, controller, !userns);
+ r = mount_legacy_cgroup_hierarchy("", controller, controller, unified_requested, !userns);
if (r < 0)
return r;
@@ -773,7 +781,7 @@ static int mount_legacy_cgns_supported(
}
skip_controllers:
- r = mount_legacy_cgroup_hierarchy("", "none,name=systemd,xattr", "systemd", false);
+ r = mount_legacy_cgroup_hierarchy("", SYSTEMD_CGROUP_CONTROLLER, "systemd", unified_requested, false);
if (r < 0)
return r;
@@ -788,7 +796,7 @@ skip_controllers:
/* Mount legacy cgroup hierarchy when cgroup namespaces are unsupported. */
static int mount_legacy_cgns_unsupported(
const char *dest,
- bool userns, uid_t uid_shift, uid_t uid_range,
+ CGroupUnified unified_requested, bool userns, uid_t uid_shift, uid_t uid_range,
const char *selinux_apifs_context) {
_cleanup_set_free_free_ Set *controllers = NULL;
const char *cgroup_root;
@@ -839,7 +847,7 @@ static int mount_legacy_cgns_unsupported(
if (r == -EINVAL) {
/* Not a symbolic link, but directly a single cgroup hierarchy */
- r = mount_legacy_cgroup_hierarchy(dest, controller, controller, true);
+ r = mount_legacy_cgroup_hierarchy(dest, controller, controller, unified_requested, true);
if (r < 0)
return r;
@@ -859,7 +867,7 @@ static int mount_legacy_cgns_unsupported(
continue;
}
- r = mount_legacy_cgroup_hierarchy(dest, combined, combined, true);
+ r = mount_legacy_cgroup_hierarchy(dest, combined, combined, unified_requested, true);
if (r < 0)
return r;
@@ -872,7 +880,7 @@ static int mount_legacy_cgns_unsupported(
}
skip_controllers:
- r = mount_legacy_cgroup_hierarchy(dest, "none,name=systemd,xattr", "systemd", false);
+ r = mount_legacy_cgroup_hierarchy(dest, SYSTEMD_CGROUP_CONTROLLER, "systemd", unified_requested, false);
if (r < 0)
return r;
@@ -914,22 +922,22 @@ static int mount_unified_cgroups(const char *dest) {
int mount_cgroups(
const char *dest,
- bool unified_requested,
+ CGroupUnified unified_requested,
bool userns, uid_t uid_shift, uid_t uid_range,
const char *selinux_apifs_context,
bool use_cgns) {
- if (unified_requested)
+ if (unified_requested >= CGROUP_UNIFIED_ALL)
return mount_unified_cgroups(dest);
else if (use_cgns && cg_ns_supported())
- return mount_legacy_cgns_supported(userns, uid_shift, uid_range, selinux_apifs_context);
+ return mount_legacy_cgns_supported(unified_requested, userns, uid_shift, uid_range, selinux_apifs_context);
- return mount_legacy_cgns_unsupported(dest, userns, uid_shift, uid_range, selinux_apifs_context);
+ return mount_legacy_cgns_unsupported(dest, unified_requested, userns, uid_shift, uid_range, selinux_apifs_context);
}
int mount_systemd_cgroup_writable(
const char *dest,
- bool unified_requested) {
+ CGroupUnified unified_requested) {
_cleanup_free_ char *own_cgroup_path = NULL;
const char *systemd_root, *systemd_own;
@@ -945,7 +953,7 @@ int mount_systemd_cgroup_writable(
if (path_equal(own_cgroup_path, "/"))
return 0;
- if (unified_requested) {
+ if (unified_requested >= CGROUP_UNIFIED_ALL) {
systemd_own = strjoina(dest, "/sys/fs/cgroup", own_cgroup_path);
systemd_root = prefix_roota(dest, "/sys/fs/cgroup");
} else {
diff --git a/src/nspawn/nspawn-mount.h b/src/nspawn/nspawn-mount.h
index 0eff8e1006..7307a838a5 100644
--- a/src/nspawn/nspawn-mount.h
+++ b/src/nspawn/nspawn-mount.h
@@ -21,6 +21,8 @@
#include <stdbool.h>
+#include "cgroup-util.h"
+
typedef enum VolatileMode {
VOLATILE_NO,
VOLATILE_YES,
@@ -58,8 +60,8 @@ int custom_mount_compare(const void *a, const void *b);
int mount_all(const char *dest, bool use_userns, bool in_userns, bool use_netns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
int mount_sysfs(const char *dest);
-int mount_cgroups(const char *dest, bool unified_requested, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context, bool use_cgns);
-int mount_systemd_cgroup_writable(const char *dest, bool unified_requested);
+int mount_cgroups(const char *dest, CGroupUnified unified_requested, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context, bool use_cgns);
+int mount_systemd_cgroup_writable(const char *dest, CGroupUnified unified_requested);
int mount_custom(const char *dest, CustomMount *mounts, unsigned n, bool userns, uid_t uid_shift, uid_t uid_range, const char *selinux_apifs_context);
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 429b6ddc4f..24d243109a 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -188,7 +188,7 @@ static UserNamespaceMode arg_userns_mode = USER_NAMESPACE_NO;
static uid_t arg_uid_shift = UID_INVALID, arg_uid_range = 0x10000U;
static bool arg_userns_chown = false;
static int arg_kill_signal = 0;
-static bool arg_unified_cgroup_hierarchy = false;
+static CGroupUnified arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_UNKNOWN;
static SettingsMask arg_settings_mask = 0;
static int arg_settings_trusted = -1;
static char **arg_parameters = NULL;
@@ -318,7 +318,14 @@ static int custom_mounts_prepare(void) {
static int detect_unified_cgroup_hierarchy(void) {
const char *e;
- int r;
+ int r, all_unified, systemd_unified;
+
+ all_unified = cg_all_unified();
+ systemd_unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
+
+ if (all_unified < 0 || systemd_unified < 0)
+ return log_error_errno(all_unified < 0 ? all_unified : systemd_unified,
+ "Failed to determine whether the unified cgroups hierarchy is used: %m");
/* Allow the user to control whether the unified hierarchy is used */
e = getenv("UNIFIED_CGROUP_HIERARCHY");
@@ -326,17 +333,22 @@ static int detect_unified_cgroup_hierarchy(void) {
r = parse_boolean(e);
if (r < 0)
return log_error_errno(r, "Failed to parse $UNIFIED_CGROUP_HIERARCHY.");
+ if (r > 0)
+ arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_ALL;
+ else
+ arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
- arg_unified_cgroup_hierarchy = r;
return 0;
}
/* Otherwise inherit the default from the host system */
- r = cg_all_unified();
- if (r < 0)
- return log_error_errno(r, "Failed to determine whether the unified cgroups hierarchy is used: %m");
+ if (all_unified > 0)
+ arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_ALL;
+ else if (systemd_unified > 0)
+ arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_SYSTEMD;
+ else
+ arg_unified_cgroup_hierarchy = CGROUP_UNIFIED_NONE;
- arg_unified_cgroup_hierarchy = r;
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-02 05:23:35 +0000