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mount-setup: try mounting 'efivarfs' only if the system bootet with EFI

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This commit is contained in:
Kay Sievers 2012-11-04 17:03:48 +01:00
parent 3dfb265083
commit 6aa220e019
2 changed files with 34 additions and 19 deletions
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3
TODO
View File

@ -1,7 +1,4 @@
Bugfixes:
* mount efivars only if /sys/firmware/efi/ exists
(add *condition callback to API mounts array and check for directory)
* check systemd-tmpfiles for selinux context hookup for mknod(), symlink() and similar
* swap units that are activated by one name but shown in the kernel under another are semi-broken

50
src/core/mount-setup.c
View File

@ -46,14 +46,20 @@
#define TTY_GID 5
#endif
typedef enum MountMode {
MNT_NONE = 0,
MNT_FATAL = 1 << 0,
MNT_IN_CONTAINER = 1 << 1,
} MountMode;
typedef struct MountPoint {
const char *what;
const char *where;
const char *type;
const char *options;
unsigned long flags;
bool fatal;
bool in_container;
bool (*condition_fn)(void);
MountMode mode;
} MountPoint;
/* The first three entries we might need before SELinux is up. The
@ -62,16 +68,26 @@ typedef struct MountPoint {
#define N_EARLY_MOUNT 4
static const MountPoint mount_table[] = {
{ "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, true, true },
{ "sysfs", "/sys", "sysfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, true, true },
{ "devtmpfs", "/dev", "devtmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME, true, true },
{ "securityfs", "/sys/kernel/security", "securityfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, false, false },
{ "efivarfs", "/sys/firmware/efi/efivars", "efivarfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV, false, false },
{ "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, true },
{ "devpts", "/dev/pts", "devpts", "mode=620,gid=" STRINGIFY(TTY_GID), MS_NOSUID|MS_NOEXEC, false, true },
{ "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME, true, true },
{ "tmpfs", "/sys/fs/cgroup", "tmpfs", "mode=755", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME, false, true },
{ "cgroup", "/sys/fs/cgroup/systemd", "cgroup", "none,name=systemd", MS_NOSUID|MS_NOEXEC|MS_NODEV, false, true },
{ "proc", "/proc", "proc", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
{ "sysfs", "/sys", "sysfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
{ "devtmpfs", "/dev", "devtmpfs", "mode=755", MS_NOSUID|MS_STRICTATIME,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
{ "securityfs", "/sys/kernel/security", "securityfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_NONE },
{ "efivarfs", "/sys/firmware/efi/efivars", "efivarfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
is_efiboot, MNT_NONE },
{ "tmpfs", "/dev/shm", "tmpfs", "mode=1777", MS_NOSUID|MS_NODEV|MS_STRICTATIME,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
{ "devpts", "/dev/pts", "devpts", "mode=620,gid=" STRINGIFY(TTY_GID), MS_NOSUID|MS_NOEXEC,
NULL, MNT_IN_CONTAINER },
{ "tmpfs", "/run", "tmpfs", "mode=755", MS_NOSUID|MS_NODEV|MS_STRICTATIME,
NULL, MNT_FATAL|MNT_IN_CONTAINER },
{ "tmpfs", "/sys/fs/cgroup", "tmpfs", "mode=755", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_STRICTATIME,
NULL, MNT_IN_CONTAINER },
{ "cgroup", "/sys/fs/cgroup/systemd", "cgroup", "none,name=systemd", MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_IN_CONTAINER },
};
/* These are API file systems that might be mounted by other software,
@ -119,6 +135,9 @@ static int mount_one(const MountPoint *p, bool relabel) {
assert(p);
if (p->condition_fn && !p->condition_fn())
return 0;
/* Relabel first, just in case */
if (relabel)
label_fix(p->where, true, true);
@ -131,7 +150,7 @@ static int mount_one(const MountPoint *p, bool relabel) {
return 0;
/* Skip securityfs in a container */
if (!p->in_container && detect_container(NULL) > 0)
if (!(p->mode & MNT_IN_CONTAINER) && detect_container(NULL) > 0)
return 0;
/* The access mode here doesn't really matter too much, since
@ -149,8 +168,8 @@ static int mount_one(const MountPoint *p, bool relabel) {
p->type,
p->flags,
p->options) < 0) {
log_full(p->fatal ? LOG_ERR : LOG_DEBUG, "Failed to mount %s: %s", p->where, strerror(errno));
return p->fatal ? -errno : 0;
log_full((p->mode & MNT_FATAL) ? LOG_ERR : LOG_DEBUG, "Failed to mount %s: %s", p->where, strerror(errno));
return (p->mode & MNT_FATAL) ? -errno : 0;
}
/* Relabel again, since we now mounted something fresh here */
@ -289,7 +308,6 @@ int mount_cgroup_controllers(char ***join_controllers) {
p.type = "cgroup";
p.options = options;
p.flags = MS_NOSUID|MS_NOEXEC|MS_NODEV;
p.fatal = false;
r = mount_one(&p, true);
free(controller);