diff options
Diffstat (limited to 'src/core/umount.c')
-rw-r--r-- | src/core/umount.c | 52 |
1 files changed, 35 insertions, 17 deletions
diff --git a/src/core/umount.c b/src/core/umount.c index d59b5d0ffb..1e5459ed80 100644 --- a/src/core/umount.c +++ b/src/core/umount.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -21,23 +19,30 @@ #include <errno.h> #include <fcntl.h> +#include <linux/dm-ioctl.h> +#include <linux/loop.h> #include <string.h> #include <sys/mount.h> #include <sys/swap.h> -#include <linux/loop.h> -#include <linux/dm-ioctl.h> +#include "libudev.h" + +#include "alloc-util.h" +#include "escape.h" +#include "fd-util.h" +#include "fstab-util.h" #include "list.h" #include "mount-setup.h" -#include "umount.h" #include "path-util.h" +#include "string-util.h" +#include "udev-util.h" +#include "umount.h" #include "util.h" #include "virt.h" -#include "libudev.h" -#include "udev-util.h" typedef struct MountPoint { char *path; + char *options; dev_t devnum; LIST_FIELDS(struct MountPoint, mount_point); } MountPoint; @@ -71,7 +76,7 @@ static int mount_points_list_get(MountPoint **head) { return -errno; for (i = 1;; i++) { - _cleanup_free_ char *path = NULL; + _cleanup_free_ char *path = NULL, *options = NULL; char *p = NULL; MountPoint *m; int k; @@ -82,15 +87,15 @@ static int mount_points_list_get(MountPoint **head) { "%*s " /* (3) major:minor */ "%*s " /* (4) root */ "%ms " /* (5) mount point */ - "%*s" /* (6) mount options */ + "%*s" /* (6) mount flags */ "%*[^-]" /* (7) optional fields */ "- " /* (8) separator */ "%*s " /* (9) file system type */ "%*s" /* (10) mount source */ - "%*s" /* (11) mount options 2 */ + "%ms" /* (11) mount options */ "%*[^\n]", /* some rubbish at the end */ - &path); - if (k != 1) { + &path, &options); + if (k != 2) { if (k == EOF) break; @@ -125,6 +130,9 @@ static int mount_points_list_get(MountPoint **head) { } m->path = p; + m->options = options; + options = NULL; + LIST_PREPEND(mount_point, *head, m); } @@ -367,8 +375,16 @@ static int mount_points_list_umount(MountPoint **head, bool *changed, bool log_e /* If we are in a container, don't attempt to read-only mount anything as that brings no real benefits, but might confuse the host, as we remount - the superblock here, not the bind mound. */ - if (detect_container(NULL) <= 0) { + the superblock here, not the bind mount. */ + if (detect_container() <= 0) { + _cleanup_free_ char *options = NULL; + /* MS_REMOUNT requires that the data parameter + * should be the same from the original mount + * except for the desired changes. Since we want + * to remount read-only, we should filter out + * rw (and ro too, because it confuses the kernel) */ + (void) fstab_filter_options(m->options, "rw\0ro\0", NULL, NULL, &options); + /* We always try to remount directories * read-only first, before we go on and umount * them. @@ -385,7 +401,8 @@ static int mount_points_list_umount(MountPoint **head, bool *changed, bool log_e * alias read-only we hence should be * relatively safe regarding keeping the fs we * can otherwise not see dirty. */ - (void) mount(NULL, m->path, NULL, MS_REMOUNT|MS_RDONLY, NULL); + log_info("Remounting '%s' read-only with options '%s'.", m->path, options); + (void) mount(NULL, m->path, NULL, MS_REMOUNT|MS_RDONLY, options); } /* Skip / and /usr since we cannot unmount that @@ -395,6 +412,7 @@ static int mount_points_list_umount(MountPoint **head, bool *changed, bool log_e #ifndef HAVE_SPLIT_USR || path_equal(m->path, "/usr") #endif + || path_startswith(m->path, "/run/initramfs") ) continue; @@ -455,7 +473,7 @@ static int loopback_points_list_detach(MountPoint **head, bool *changed) { major(root_st.st_dev) != 0 && lstat(m->path, &loopback_st) >= 0 && root_st.st_dev == loopback_st.st_rdev) { - n_failed ++; + n_failed++; continue; } @@ -490,7 +508,7 @@ static int dm_points_list_detach(MountPoint **head, bool *changed) { if (k >= 0 && major(root_st.st_dev) != 0 && root_st.st_dev == m->devnum) { - n_failed ++; + n_failed++; continue; } |