typedef struct MountPoint {
char *path;
dev_t devnum;
+ bool skip_ro;
LIST_FIELDS (struct MountPoint, mount_point);
} MountPoint;
for (i = 1;; i++) {
int k;
MountPoint *m;
+ char *root;
+ bool skip_ro;
path = p = NULL;
"%*s " /* (1) mount id */
"%*s " /* (2) parent id */
"%*s " /* (3) major:minor */
- "%*s " /* (4) root */
+ "%ms " /* (4) root */
"%ms " /* (5) mount point */
"%*s" /* (6) mount options */
"%*[^-]" /* (7) optional fields */
"%*s" /* (10) mount source */
"%*s" /* (11) mount options 2 */
"%*[^\n]", /* some rubbish at the end */
- &path)) != 1) {
+ &root,
+ &path)) != 2) {
if (k == EOF)
break;
continue;
}
+ /* If we encounter a bind mount, don't try to remount
+ * the source dir too early */
+ skip_ro = !streq(root, "/");
+ free(root);
+
p = cunescape(path);
free(path);
goto finish;
}
- if (mount_point_is_api(p)) {
+ if (mount_point_is_api(p) || mount_point_ignore(p)) {
free(p);
continue;
}
}
m->path = p;
+ m->skip_ro = skip_ro;
LIST_PREPEND(MountPoint, mount_point, *head, m);
}
}
first = udev_enumerate_get_list_entry(e);
-
udev_list_entry_foreach(item, first) {
MountPoint *lb;
struct udev_device *d;
int fd, r;
if ((fd = open(device, O_RDONLY|O_CLOEXEC)) < 0)
- return -errno;
+ return errno == ENOENT ? 0 : -errno;
r = ioctl(fd, LOOP_CLR_FD, 0);
close_nointr_nofail(fd);
assert(head);
LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- if (streq(m->path, "/"))
+ if (streq(m->path, "/")) {
+ n_failed++;
continue;
+ }
/* Trying to umount. Forcing to umount if busy (only for NFS mounts) */
if (umount2(m->path, MNT_FORCE) == 0) {
-
if (changed)
*changed = true;
LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ if (m->skip_ro) {
+ n_failed++;
+ continue;
+ }
+
/* Trying to remount read-only */
if (mount(NULL, m->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0) {
if (changed)
static int loopback_points_list_detach(MountPoint **head, bool *changed) {
MountPoint *m, *n;
- int n_failed = 0;
+ int n_failed = 0, k;
+ struct stat root_st;
assert(head);
+ k = lstat("/", &root_st);
+
LIST_FOREACH_SAFE(mount_point, m, n, *head) {
int r;
+ struct stat loopback_st;
+
+ if (k >= 0 &&
+ major(root_st.st_dev) != 0 &&
+ lstat(m->path, &loopback_st) >= 0 &&
+ root_st.st_dev == loopback_st.st_rdev) {
+ n_failed ++;
+ continue;
+ }
if ((r = delete_loopback(m->path)) >= 0) {
static int dm_points_list_detach(MountPoint **head, bool *changed) {
MountPoint *m, *n;
- int n_failed = 0;
+ int n_failed = 0, k;
+ struct stat root_st;
assert(head);
+ k = lstat("/", &root_st);
+
LIST_FOREACH_SAFE(mount_point, m, n, *head) {
int r;
+ if (k >= 0 &&
+ major(root_st.st_dev) != 0 &&
+ root_st.st_dev == m->devnum) {
+ n_failed ++;
+ continue;
+ }
+
if ((r = delete_dm(m->devnum)) >= 0) {
if (r > 0 && changed)