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Diffstat (limited to 'src/umount.c')
-rw-r--r--src/umount.c210
1 files changed, 131 insertions, 79 deletions
diff --git a/src/umount.c b/src/umount.c
index c95f72760b..c7f62081d2 100644
--- a/src/umount.c
+++ b/src/umount.c
@@ -40,30 +40,37 @@ typedef struct MountPoint {
LIST_FIELDS (struct MountPoint, mount_point);
} MountPoint;
-static void mount_point_remove_and_free(MountPoint *mount_point, MountPoint **mount_point_list_head) {
- LIST_REMOVE(MountPoint, mount_point, *mount_point_list_head, mount_point);
+static void mount_point_free(MountPoint **head, MountPoint *m) {
+ assert(head);
+ assert(m);
- free(mount_point->path);
- free(mount_point);
+ LIST_REMOVE(MountPoint, mount_point, *head, m);
+
+ free(m->path);
+ free(m);
}
-static void mount_points_list_free(MountPoint **mount_point_list_head) {
- while (*mount_point_list_head)
- mount_point_remove_and_free(*mount_point_list_head, mount_point_list_head);
+static void mount_points_list_free(MountPoint **head) {
+ assert(head);
+
+ while (*head)
+ mount_point_free(head, *head);
}
-static int mount_points_list_get(MountPoint **mount_point_list_head) {
+static int mount_points_list_get(MountPoint **head) {
FILE *proc_self_mountinfo;
char *path, *p;
unsigned int i;
int r;
+ assert(head);
+
if (!(proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
return -errno;
for (i = 1;; i++) {
int k;
- MountPoint *mp;
+ MountPoint *m;
path = p = NULL;
@@ -103,14 +110,14 @@ static int mount_points_list_get(MountPoint **mount_point_list_head) {
continue;
}
- if (!(mp = new0(MountPoint, 1))) {
+ if (!(m = new0(MountPoint, 1))) {
free(p);
r = -ENOMEM;
goto finish;
}
- mp->path = p;
- LIST_PREPEND(MountPoint, mount_point, *mount_point_list_head, mp);
+ m->path = p;
+ LIST_PREPEND(MountPoint, mount_point, *head, m);
}
r = 0;
@@ -121,11 +128,13 @@ finish:
return r;
}
-static int swap_list_get(MountPoint **swap_list_head) {
+static int swap_list_get(MountPoint **head) {
FILE *proc_swaps;
unsigned int i;
int r;
+ assert(head);
+
if (!(proc_swaps = fopen("/proc/swaps", "re")))
return -errno;
@@ -173,7 +182,7 @@ static int swap_list_get(MountPoint **swap_list_head) {
}
swap->path = d;
- LIST_PREPEND(MountPoint, mount_point, *swap_list_head, swap);
+ LIST_PREPEND(MountPoint, mount_point, *head, swap);
}
r = 0;
@@ -184,12 +193,14 @@ finish:
return r;
}
-static int loopback_list_get(MountPoint **loopback_list_head) {
+static int loopback_list_get(MountPoint **head) {
int r;
struct udev *udev;
struct udev_enumerate *e = NULL;
struct udev_list_entry *item = NULL, *first = NULL;
+ assert(head);
+
if (!(udev = udev_new())) {
r = -ENOMEM;
goto finish;
@@ -244,7 +255,7 @@ static int loopback_list_get(MountPoint **loopback_list_head) {
}
lb->path = loop;
- LIST_PREPEND(MountPoint, mount_point, *loopback_list_head, lb);
+ LIST_PREPEND(MountPoint, mount_point, *head, lb);
}
r = 0;
@@ -259,12 +270,14 @@ finish:
return r;
}
-static int dm_list_get(MountPoint **dm_list_head) {
+static int dm_list_get(MountPoint **head) {
int r;
struct udev *udev;
struct udev_enumerate *e = NULL;
struct udev_list_entry *item = NULL, *first = NULL;
+ assert(head);
+
if (!(udev = udev_new())) {
r = -ENOMEM;
goto finish;
@@ -324,7 +337,7 @@ static int dm_list_get(MountPoint **dm_list_head) {
m->path = node;
m->devnum = devnum;
- LIST_PREPEND(MountPoint, mount_point, *dm_list_head, m);
+ LIST_PREPEND(MountPoint, mount_point, *head, m);
}
r = 0;
@@ -348,8 +361,14 @@ static int delete_loopback(const char *device) {
r = ioctl(fd, LOOP_CLR_FD, 0);
close_nointr_nofail(fd);
+ if (r >= 0)
+ return 1;
+
/* ENXIO: not bound, so no error */
- return (r >= 0 || errno == ENXIO) ? 0 : -errno;
+ if (errno == ENXIO)
+ return 0;
+
+ return -errno;
}
static int delete_dm(dev_t devnum) {
@@ -375,92 +394,125 @@ static int delete_dm(dev_t devnum) {
return r >= 0 ? 0 : -errno;
}
-static int mount_points_list_umount(MountPoint **mount_point_list_head) {
- MountPoint *mp, *mp_next;
- int failed = 0;
+static int mount_points_list_umount(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
- LIST_FOREACH_SAFE(mount_point, mp, mp_next, *mount_point_list_head) {
- if (streq(mp->path, "/"))
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ if (streq(m->path, "/"))
continue;
/* Trying to umount. Forcing to umount if busy (only for NFS mounts) */
- if (umount2(mp->path, MNT_FORCE) == 0)
- mount_point_remove_and_free(mp, mount_point_list_head);
- else {
- log_warning("Could not unmount %s: %m", mp->path);
- failed++;
+ if (umount2(m->path, MNT_FORCE) == 0) {
+
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not unmount %s: %m", m->path);
+ n_failed++;
}
}
- return failed;
+ return n_failed;
}
-static int mount_points_list_remount_read_only(MountPoint **mount_point_list_head) {
- MountPoint *mp, *mp_next;
- int failed = 0;
+static int mount_points_list_remount_read_only(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- LIST_FOREACH_SAFE(mount_point, mp, mp_next, *mount_point_list_head) {
/* Trying to remount read-only */
- if (mount(NULL, mp->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0)
- mount_point_remove_and_free(mp, mount_point_list_head);
- else {
- log_warning("Could not remount as read-only %s: %m", mp->path);
- failed++;
+ if (mount(NULL, m->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0) {
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not remount as read-only %s: %m", m->path);
+ n_failed++;
}
}
- return failed;
+ return n_failed;
}
-static int swap_points_list_off(MountPoint **swap_list_head) {
- MountPoint *swap, *swap_next;
- int failed = 0;
+static int swap_points_list_off(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
- LIST_FOREACH_SAFE(mount_point, swap, swap_next, *swap_list_head) {
- if (swapoff(swap->path) == 0)
- mount_point_remove_and_free(swap, swap_list_head);
- else {
- log_warning("Could not deactivate swap %s: %m", swap->path);
- failed++;
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ if (swapoff(m->path) == 0) {
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not deactivate swap %s: %m", m->path);
+ n_failed++;
}
}
- return failed;
+ return n_failed;
}
-static int loopback_points_list_detach(MountPoint **loopback_list_head) {
- MountPoint *loopback, *loopback_next;
- int failed = 0;
+static int loopback_points_list_detach(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ int r;
- LIST_FOREACH_SAFE(mount_point, loopback, loopback_next, *loopback_list_head) {
- if (delete_loopback(loopback->path) == 0)
- mount_point_remove_and_free(loopback, loopback_list_head);
- else {
- log_warning("Could not delete loopback %s: %m", loopback->path);
- failed++;
+ if ((r = delete_loopback(m->path)) >= 0) {
+
+ if (r > 0 && changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not delete loopback %s: %m", m->path);
+ n_failed++;
}
}
- return failed;
+ return n_failed;
}
-static int dm_points_list_detach(MountPoint **dm_list_head) {
- MountPoint *dm, *dm_next;
- int failed = 0;
+static int dm_points_list_detach(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ int r;
+
+ if ((r = delete_dm(m->devnum)) >= 0) {
+
+ if (r > 0 && changed)
+ *changed = true;
- LIST_FOREACH_SAFE(mount_point, dm, dm_next, *dm_list_head) {
- if (delete_dm(dm->devnum) == 0)
- mount_point_remove_and_free(dm, dm_list_head);
- else {
- log_warning("Could not delete dm %s: %m", dm->path);
- failed++;
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not delete dm %s: %m", m->path);
+ n_failed++;
}
}
- return failed;
+ return n_failed;
}
-int umount_all(void) {
+int umount_all(bool *changed) {
int r;
LIST_HEAD(MountPoint, mp_list_head);
@@ -470,11 +522,11 @@ int umount_all(void) {
if (r < 0)
goto end;
- r = mount_points_list_umount(&mp_list_head);
+ r = mount_points_list_umount(&mp_list_head, changed);
if (r <= 0)
goto end;
- r = mount_points_list_remount_read_only(&mp_list_head);
+ r = mount_points_list_remount_read_only(&mp_list_head, changed);
end:
mount_points_list_free(&mp_list_head);
@@ -482,7 +534,7 @@ int umount_all(void) {
return r;
}
-int swapoff_all(void) {
+int swapoff_all(bool *changed) {
int r;
LIST_HEAD(MountPoint, swap_list_head);
@@ -492,7 +544,7 @@ int swapoff_all(void) {
if (r < 0)
goto end;
- r = swap_points_list_off(&swap_list_head);
+ r = swap_points_list_off(&swap_list_head, changed);
end:
mount_points_list_free(&swap_list_head);
@@ -500,7 +552,7 @@ int swapoff_all(void) {
return r;
}
-int loopback_detach_all(void) {
+int loopback_detach_all(bool *changed) {
int r;
LIST_HEAD(MountPoint, loopback_list_head);
@@ -510,7 +562,7 @@ int loopback_detach_all(void) {
if (r < 0)
goto end;
- r = loopback_points_list_detach(&loopback_list_head);
+ r = loopback_points_list_detach(&loopback_list_head, changed);
end:
mount_points_list_free(&loopback_list_head);
@@ -518,7 +570,7 @@ int loopback_detach_all(void) {
return r;
}
-int dm_detach_all(void) {
+int dm_detach_all(bool *changed) {
int r;
LIST_HEAD(MountPoint, dm_list_head);
@@ -528,7 +580,7 @@ int dm_detach_all(void) {
if (r < 0)
goto end;
- r = dm_points_list_detach(&dm_list_head);
+ r = dm_points_list_detach(&dm_list_head, changed);
end:
mount_points_list_free(&dm_list_head);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-09 18:45:27 +0000