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-rw-r--r--src/core/mount-setup.c120
1 files changed, 72 insertions, 48 deletions
diff --git a/src/core/mount-setup.c b/src/core/mount-setup.c
index 1782d40720..ca63a93e8b 100644
--- a/src/core/mount-setup.c
+++ b/src/core/mount-setup.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
@@ -19,28 +17,32 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <sys/mount.h>
#include <errno.h>
+#include <ftw.h>
#include <stdlib.h>
+#include <sys/mount.h>
#include <unistd.h>
-#include <ftw.h>
-#include "mount-setup.h"
-#include "dev-setup.h"
+#include "alloc-util.h"
#include "bus-util.h"
+#include "cgroup-util.h"
+#include "dev-setup.h"
+#include "efivars.h"
+#include "fs-util.h"
+#include "label.h"
#include "log.h"
#include "macro.h"
-#include "util.h"
-#include "label.h"
-#include "set.h"
-#include "strv.h"
+#include "missing.h"
#include "mkdir.h"
+#include "mount-setup.h"
+#include "mount-util.h"
#include "path-util.h"
-#include "missing.h"
-#include "virt.h"
-#include "efivars.h"
+#include "set.h"
#include "smack-util.h"
-#include "cgroup-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+#include "virt.h"
typedef enum MountMode {
MNT_NONE = 0,
@@ -93,20 +95,22 @@ static const MountPoint mount_table[] = {
#endif
{ "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
+ { "cgroup", "/sys/fs/cgroup", "cgroup2", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
+ cg_is_unified_wanted, MNT_FATAL|MNT_IN_CONTAINER },
{ "tmpfs", "/sys/fs/cgroup", "tmpfs", "mode=755", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME,
- NULL, MNT_FATAL|MNT_IN_CONTAINER },
+ cg_is_legacy_wanted, MNT_FATAL|MNT_IN_CONTAINER },
+ { "cgroup", "/sys/fs/cgroup/systemd", "cgroup2", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
+ cg_is_unified_systemd_controller_wanted, MNT_IN_CONTAINER },
{ "cgroup", "/sys/fs/cgroup/systemd", "cgroup", "none,name=systemd,xattr", MS_NOSUID|MS_NOEXEC|MS_NODEV,
- NULL, MNT_IN_CONTAINER },
+ cg_is_legacy_systemd_controller_wanted, MNT_IN_CONTAINER },
{ "cgroup", "/sys/fs/cgroup/systemd", "cgroup", "none,name=systemd", MS_NOSUID|MS_NOEXEC|MS_NODEV,
- NULL, MNT_FATAL|MNT_IN_CONTAINER },
+ cg_is_legacy_systemd_controller_wanted, MNT_FATAL|MNT_IN_CONTAINER },
{ "pstore", "/sys/fs/pstore", "pstore", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_NONE },
#ifdef ENABLE_EFI
{ "efivarfs", "/sys/firmware/efi/efivars", "efivarfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
is_efi_boot, MNT_NONE },
#endif
- { "kdbusfs", "/sys/fs/kdbus", "kdbusfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
- is_kdbus_wanted, MNT_IN_CONTAINER },
};
/* These are API file systems that might be mounted by other software,
@@ -153,24 +157,26 @@ static int mount_one(const MountPoint *p, bool relabel) {
/* Relabel first, just in case */
if (relabel)
- label_fix(p->where, true, true);
+ (void) label_fix(p->where, true, true);
r = path_is_mount_point(p->where, AT_SYMLINK_FOLLOW);
- if (r < 0 && r != -ENOENT)
- return r;
+ if (r < 0 && r != -ENOENT) {
+ log_full_errno((p->mode & MNT_FATAL) ? LOG_ERR : LOG_DEBUG, r, "Failed to determine whether %s is a mount point: %m", p->where);
+ return (p->mode & MNT_FATAL) ? r : 0;
+ }
if (r > 0)
return 0;
/* Skip securityfs in a container */
- if (!(p->mode & MNT_IN_CONTAINER) && detect_container(NULL) > 0)
+ if (!(p->mode & MNT_IN_CONTAINER) && detect_container() > 0)
return 0;
/* The access mode here doesn't really matter too much, since
* the mounted file system will take precedence anyway. */
if (relabel)
- mkdir_p_label(p->where, 0755);
+ (void) mkdir_p_label(p->where, 0755);
else
- mkdir_p(p->where, 0755);
+ (void) mkdir_p(p->where, 0755);
log_debug("Mounting %s to %s of type %s with options %s.",
p->what,
@@ -183,40 +189,47 @@ static int mount_one(const MountPoint *p, bool relabel) {
p->type,
p->flags,
p->options) < 0) {
- log_full((p->mode & MNT_FATAL) ? LOG_ERR : LOG_DEBUG, "Failed to mount %s at %s: %m", p->type, p->where);
+ log_full_errno((p->mode & MNT_FATAL) ? LOG_ERR : LOG_DEBUG, errno, "Failed to mount %s at %s: %m", p->type, p->where);
return (p->mode & MNT_FATAL) ? -errno : 0;
}
/* Relabel again, since we now mounted something fresh here */
if (relabel)
- label_fix(p->where, false, false);
+ (void) label_fix(p->where, false, false);
return 1;
}
-int mount_setup_early(void) {
+static int mount_points_setup(unsigned n, bool loaded_policy) {
unsigned i;
int r = 0;
- assert_cc(N_EARLY_MOUNT <= ELEMENTSOF(mount_table));
-
- /* Do a minimal mount of /proc and friends to enable the most
- * basic stuff, such as SELinux */
- for (i = 0; i < N_EARLY_MOUNT; i ++) {
+ for (i = 0; i < n; i ++) {
int j;
- j = mount_one(mount_table + i, false);
- if (r == 0)
+ j = mount_one(mount_table + i, loaded_policy);
+ if (j != 0 && r >= 0)
r = j;
}
return r;
}
+int mount_setup_early(void) {
+ assert_cc(N_EARLY_MOUNT <= ELEMENTSOF(mount_table));
+
+ /* Do a minimal mount of /proc and friends to enable the most
+ * basic stuff, such as SELinux */
+ return mount_points_setup(N_EARLY_MOUNT, false);
+}
+
int mount_cgroup_controllers(char ***join_controllers) {
_cleanup_set_free_free_ Set *controllers = NULL;
int r;
+ if (!cg_is_legacy_wanted())
+ return 0;
+
/* Mount all available cgroup controllers that are built into the kernel. */
controllers = set_new(&string_hash_ops);
@@ -296,7 +309,17 @@ int mount_cgroup_controllers(char ***join_controllers) {
return log_oom();
r = symlink(options, t);
- if (r < 0 && errno != EEXIST)
+ if (r >= 0) {
+#ifdef SMACK_RUN_LABEL
+ _cleanup_free_ char *src;
+ src = strappend("/sys/fs/cgroup/", options);
+ if (!src)
+ return log_oom();
+ r = mac_smack_copy(t, src);
+ if (r < 0 && r != -EOPNOTSUPP)
+ return log_error_errno(r, "Failed to copy smack label from %s to %s: %m", src, t);
+#endif
+ } else if (errno != EEXIST)
return log_error_errno(errno, "Failed to create symlink %s: %m", t);
}
}
@@ -334,16 +357,9 @@ static int nftw_cb(
#endif
int mount_setup(bool loaded_policy) {
- unsigned i;
int r = 0;
- for (i = 0; i < ELEMENTSOF(mount_table); i ++) {
- int j;
-
- j = mount_one(mount_table + i, loaded_policy);
- if (r == 0)
- r = j;
- }
+ r = mount_points_setup(ELEMENTSOF(mount_table), loaded_policy);
if (r < 0)
return r;
@@ -360,6 +376,7 @@ int mount_setup(bool loaded_policy) {
before_relabel = now(CLOCK_MONOTONIC);
nftw("/dev", nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL);
+ nftw("/dev/shm", nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL);
nftw("/run", nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL);
after_relabel = now(CLOCK_MONOTONIC);
@@ -380,7 +397,7 @@ int mount_setup(bool loaded_policy) {
* nspawn and the container tools work out of the box. If
* specific setups need other settings they can reset the
* propagation mode to private if needed. */
- if (detect_container(NULL) <= 0)
+ if (detect_container() <= 0)
if (mount(NULL, "/", NULL, MS_REC|MS_SHARED, NULL) < 0)
log_warning_errno(errno, "Failed to set up the root directory for shared mount propagation: %m");
@@ -389,9 +406,16 @@ int mount_setup(bool loaded_policy) {
* really needs to stay for good, otherwise software that
* copied sd-daemon.c into their sources will misdetect
* systemd. */
- mkdir_label("/run/systemd", 0755);
- mkdir_label("/run/systemd/system", 0755);
- mkdir_label("/run/systemd/inaccessible", 0000);
+ (void) mkdir_label("/run/systemd", 0755);
+ (void) mkdir_label("/run/systemd/system", 0755);
+ (void) mkdir_label("/run/systemd/inaccessible", 0000);
+ /* Set up inaccessible items */
+ (void) mknod("/run/systemd/inaccessible/reg", S_IFREG | 0000, 0);
+ (void) mkdir_label("/run/systemd/inaccessible/dir", 0000);
+ (void) mknod("/run/systemd/inaccessible/chr", S_IFCHR | 0000, makedev(0, 0));
+ (void) mknod("/run/systemd/inaccessible/blk", S_IFBLK | 0000, makedev(0, 0));
+ (void) mkfifo("/run/systemd/inaccessible/fifo", 0000);
+ (void) mknod("/run/systemd/inaccessible/sock", S_IFSOCK | 0000, 0);
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-23 01:13:01 +0000