X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fdevice.c;h=5c18d996eaf76f53630a6c6f8ba9d19be62114a0;hp=bf032d0ce292bcb135a92880701bf82e8a7a0ed6;hb=f81c701649044712b75a7c3cdbbf2cb54fc03a0b;hpb=5845b46ba3883fe0b21217c65f41383eb52cddb6

diff --git a/src/device.c b/src/device.c
index bf032d0ce..5c18d996e 100644
--- a/src/device.c
+++ b/src/device.c
@@ -188,10 +188,6 @@ static int device_update_unit(Manager *m, struct udev_device *dev, const char *p
         if ((r = device_find_escape_name(m, path, &u)) < 0)
                 return r;
 
-        /* If a different unit already claimed this name then let's do
-         * nothing. This can happen for example when two disks with
-         * the same label are plugged in, and which hence try to get
-         * conflicting symlinks in /dev/disk/by-label/xxxx */
         if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs))
                 return -EEXIST;
 
@@ -405,6 +401,39 @@ static Unit *device_following(Unit *u) {
         return UNIT(first);
 }
 
+static int device_following_set(Unit *u, Set **_s) {
+        Device *d = DEVICE(u);
+        Device *other;
+        Set *s;
+        int r;
+
+        assert(d);
+        assert(_s);
+
+        if (!d->same_sysfs_prev && !d->same_sysfs_next) {
+                *_s = NULL;
+                return 0;
+        }
+
+        if (!(s = set_new(NULL, NULL)))
+                return -ENOMEM;
+
+        for (other = d->same_sysfs_next; other; other = other->same_sysfs_next)
+                if ((r = set_put(s, other)) < 0)
+                        goto fail;
+
+        for (other = d->same_sysfs_prev; other; other = other->same_sysfs_prev)
+                if ((r = set_put(s, other)) < 0)
+                        goto fail;
+
+        *_s = s;
+        return 1;
+
+fail:
+        set_free(s);
+        return r;
+}
+
 static void device_shutdown(Manager *m) {
         assert(m);
 
@@ -533,11 +562,9 @@ DEFINE_STRING_TABLE_LOOKUP(device_state, DeviceState);
 const UnitVTable device_vtable = {
         .suffix = ".device",
 
-        .no_requires = true,
         .no_instances = true,
         .no_snapshots = true,
         .no_isolate = true,
-        .no_alias = true,
 
         .init = device_init,
 
@@ -555,6 +582,7 @@ const UnitVTable device_vtable = {
         .bus_invalidating_properties =  bus_device_invalidating_properties,
 
         .following = device_following,
+        .following_set = device_following_set,
 
         .enumerate = device_enumerate,
         .shutdown = device_shutdown