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-rw-r--r--src/core/mount.c234
1 files changed, 137 insertions, 97 deletions
diff --git a/src/core/mount.c b/src/core/mount.c
index daf7f5697b..8192a3616f 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -1387,6 +1387,128 @@ static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *user
return 0;
}
+typedef struct {
+ bool is_mounted;
+ bool just_mounted;
+ bool just_changed;
+} MountSetupFlags;
+
+static int mount_setup_new_unit(
+ Unit *u,
+ const char *what,
+ const char *where,
+ const char *options,
+ const char *fstype,
+ MountSetupFlags *flags) {
+
+ MountParameters *p;
+
+ assert(u);
+ assert(flags);
+
+ u->source_path = strdup("/proc/self/mountinfo");
+ MOUNT(u)->where = strdup(where);
+ if (!u->source_path && !MOUNT(u)->where)
+ return -ENOMEM;
+
+ /* Make sure to initialize those fields before mount_is_extrinsic(). */
+ MOUNT(u)->from_proc_self_mountinfo = true;
+ p = &MOUNT(u)->parameters_proc_self_mountinfo;
+
+ p->what = strdup(what);
+ p->options = strdup(options);
+ p->fstype = strdup(fstype);
+ if (!p->what || !p->options || !p->fstype)
+ return -ENOMEM;
+
+ if (!mount_is_extrinsic(MOUNT(u))) {
+ const char *target;
+ int r;
+
+ target = mount_is_network(p) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
+ r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
+ if (r < 0)
+ return r;
+
+ r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
+ if (r < 0)
+ return r;
+ }
+
+ flags->is_mounted = true;
+ flags->just_mounted = true;
+ flags->just_changed = true;
+
+ return 0;
+}
+
+static int mount_setup_existing_unit(
+ Unit *u,
+ const char *what,
+ const char *where,
+ const char *options,
+ const char *fstype,
+ MountSetupFlags *flags) {
+
+ MountParameters *p;
+ bool load_extras = false;
+ int r1, r2, r3;
+
+ assert(u);
+ assert(flags);
+
+ if (!MOUNT(u)->where) {
+ MOUNT(u)->where = strdup(where);
+ if (!MOUNT(u)->where)
+ return -ENOMEM;
+ }
+
+ /* Make sure to initialize those fields before mount_is_extrinsic(). */
+ p = &MOUNT(u)->parameters_proc_self_mountinfo;
+
+ r1 = free_and_strdup(&p->what, what);
+ r2 = free_and_strdup(&p->options, options);
+ r3 = free_and_strdup(&p->fstype, fstype);
+ if (r1 < 0 || r2 < 0 || r3 < 0)
+ return -ENOMEM;
+
+ flags->just_changed = r1 > 0 || r2 > 0 || r3 > 0;
+ flags->is_mounted = true;
+ flags->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
+
+ MOUNT(u)->from_proc_self_mountinfo = true;
+
+ if (!mount_is_extrinsic(MOUNT(u)) && mount_is_network(p)) {
+ /* _netdev option may have shown up late, or on a
+ * remount. Add remote-fs dependencies, even though
+ * local-fs ones may already be there.
+ *
+ * Note: due to a current limitation (we don't track
+ * in the dependency "Set*" objects who created a
+ * dependency), we can only add deps, never lose them,
+ * until the next full daemon-reload. */
+ unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true);
+ load_extras = true;
+ }
+
+ if (u->load_state == UNIT_NOT_FOUND) {
+ u->load_state = UNIT_LOADED;
+ u->load_error = 0;
+
+ /* Load in the extras later on, after we
+ * finished initialization of the unit */
+
+ /* FIXME: since we're going to load the unit later on, why setting load_extras=true ? */
+ load_extras = true;
+ flags->just_changed = true;
+ }
+
+ if (load_extras)
+ return mount_add_extras(MOUNT(u));
+
+ return 0;
+}
+
static int mount_setup_unit(
Manager *m,
const char *what,
@@ -1395,10 +1517,8 @@ static int mount_setup_unit(
const char *fstype,
bool set_flags) {
- _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL;
- bool load_extras = false;
- MountParameters *p;
- bool delete, changed = false;
+ _cleanup_free_ char *e = NULL;
+ MountSetupFlags flags;
Unit *u;
int r;
@@ -1426,114 +1546,34 @@ static int mount_setup_unit(
u = manager_get_unit(m, e);
if (!u) {
- delete = true;
-
+ /* First time we see this mount point meaning that it's
+ * not been initiated by a mount unit but rather by the
+ * sysadmin having called mount(8) directly. */
r = unit_new_for_name(m, sizeof(Mount), e, &u);
if (r < 0)
goto fail;
- MOUNT(u)->where = strdup(where);
- if (!MOUNT(u)->where) {
- r = -ENOMEM;
- goto fail;
- }
-
- u->source_path = strdup("/proc/self/mountinfo");
- if (!u->source_path) {
- r = -ENOMEM;
- goto fail;
- }
-
- if (!mount_is_extrinsic(MOUNT(u))) {
- const char* target;
-
- target = mount_needs_network(options, fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
- r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
- if (r < 0)
- goto fail;
-
- r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
- if (r < 0)
- goto fail;
- }
-
- unit_add_to_load_queue(u);
- changed = true;
- } else {
- delete = false;
-
- if (!MOUNT(u)->where) {
- MOUNT(u)->where = strdup(where);
- if (!MOUNT(u)->where) {
- r = -ENOMEM;
- goto fail;
- }
- }
-
- if (!mount_is_extrinsic(MOUNT(u)) &&
- mount_needs_network(options, fstype)) {
- /* _netdev option may have shown up late, or on a
- * remount. Add remote-fs dependencies, even though
- * local-fs ones may already be there. */
- unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true);
- load_extras = true;
- }
-
- if (u->load_state == UNIT_NOT_FOUND) {
- u->load_state = UNIT_LOADED;
- u->load_error = 0;
-
- /* Load in the extras later on, after we
- * finished initialization of the unit */
- load_extras = true;
- changed = true;
- }
- }
+ r = mount_setup_new_unit(u, what, where, options, fstype, &flags);
+ if (r < 0)
+ unit_free(u);
+ } else
+ r = mount_setup_existing_unit(u, what, where, options, fstype, &flags);
- w = strdup(what);
- o = strdup(options);
- f = strdup(fstype);
- if (!w || !o || !f) {
- r = -ENOMEM;
+ if (r < 0)
goto fail;
- }
-
- p = &MOUNT(u)->parameters_proc_self_mountinfo;
-
- changed = changed ||
- !streq_ptr(p->options, options) ||
- !streq_ptr(p->what, what) ||
- !streq_ptr(p->fstype, fstype);
if (set_flags) {
- MOUNT(u)->is_mounted = true;
- MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
- MOUNT(u)->just_changed = changed;
- }
-
- MOUNT(u)->from_proc_self_mountinfo = true;
-
- free_and_replace(p->what, w);
- free_and_replace(p->options, o);
- free_and_replace(p->fstype, f);
-
- if (load_extras) {
- r = mount_add_extras(MOUNT(u));
- if (r < 0)
- goto fail;
+ MOUNT(u)->is_mounted = flags.is_mounted;
+ MOUNT(u)->just_mounted = flags.just_mounted;
+ MOUNT(u)->just_changed = flags.just_changed;
}
- if (changed)
+ if (flags.just_changed)
unit_add_to_dbus_queue(u);
return 0;
-
fail:
log_warning_errno(r, "Failed to set up mount unit: %m");
-
- if (delete)
- unit_free(u);
-
return r;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-09-20 02:41:09 +0000