snapshot: implement snapshot unit logic

[elogind.git] / device.c

diff --git a/device.c b/device.c
index b00a0f987f6fb227b7192241e9a2d57f30866dc9..a9b003c66484c4871b7621c2e06e8f2f047f4472 100644 (file)
--- a/device.c
+++ b/device.c
@@ -27,6 +27,7 @@
 #include "device.h"
 #include "strv.h"
 #include "log.h"
+#include "unit-name.h"
 
 static const UnitActiveState state_translation_table[_DEVICE_STATE_MAX] = {
         [DEVICE_DEAD] = UNIT_INACTIVE,
@@ -64,7 +65,7 @@ static void device_set_state(Device *d, DeviceState state) {
         d->state = state;
 
         if (state != old_state)
-                log_debug("%s changed %s → %s", unit_id(UNIT(d)), state_string_table[old_state], state_string_table[state]);
+                log_debug("%s changed %s → %s", UNIT(d)->meta.id, state_string_table[old_state], state_string_table[state]);
 
         unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state]);
 }
@@ -113,7 +114,7 @@ static int device_add_escaped_name(Unit *u, const char *dn, bool make_id) {
         assert(dn);
         assert(dn[0] == '/');
 
-        if (!(e = unit_name_escape_path(dn+1, ".device")))
+        if (!(e = unit_name_build_escape(dn+1, NULL, ".device")))
                 return -ENOMEM;
 
         r = unit_add_name(u, e);
@@ -138,7 +139,7 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) {
         assert(dn[0] == '/');
         assert(_u);
 
-        if (!(e = unit_name_escape_path(dn+1, ".device")))
+        if (!(e = unit_name_build_escape(dn+1, NULL, ".device")))
                 return -ENOMEM;
 
         u = manager_get_unit(m, e);
@@ -152,28 +153,6 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) {
         return 0;
 }
 
-static bool devnode_is_api(const char *node) {
-        unsigned i;
-
-        static const char * const table[] = {
-                "/dev/null",
-                "/dev/zero",
-                "/dev/urandom",
-                "/dev/random",
-                "/dev/port",
-                "/dev/oldmem",
-                "/dev/full",
-                "/dev/kmsg",
-                "/dev/mem"
-        };
-
-        for (i = 0; i < ELEMENTSOF(table); i++)
-                if (streq(table[i], node))
-                        return true;
-
-        return false;
-}
-
 static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) {
         const char *dn, *names, *wants, *sysfs, *expose, *model;
         Unit *u = NULL;
@@ -182,35 +161,29 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
         size_t l;
         bool delete;
         struct udev_list_entry *item = NULL, *first = NULL;
+        int b;
 
         assert(m);
 
         if (!(sysfs = udev_device_get_syspath(dev)))
                 return -ENOMEM;
 
+        if (!(expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE")))
+                return 0;
+
+        if ((b = parse_boolean(expose)) < 0) {
+                log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose);
+                return 0;
+        }
+
+        if (!b)
+                return 0;
+
         /* Check whether this entry is even relevant for us. */
         dn = udev_device_get_devnode(dev);
-        expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE");
         names = udev_device_get_property_value(dev, "SYSTEMD_NAMES");
         wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS");
 
-        if (expose) {
-                int b;
-
-                if ((b = parse_boolean(expose)) < 0) {
-                        log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose);
-                        return 0;
-                }
-
-                if (!b)
-                        return 0;
-        } else
-                if ((!dn || devnode_is_api(dn)) && !names && !wants)
-                        return 0;
-
-        /* Ok, seems kinda interesting. Now, let's see if this one
-         * already exists. */
-
         if ((r = device_find_escape_name(m, sysfs, &u)) < 0)
                 return r;
 
@@ -303,7 +276,7 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
                                 goto fail;
                         }
 
-                        r = unit_add_dependency_by_name(u, UNIT_WANTS, e);
+                        r = unit_add_dependency_by_name(u, UNIT_WANTS, NULL, e);
                         free(e);
 
                         if (r < 0)
@@ -356,7 +329,7 @@ static int device_process_removed_device(Manager *m, struct udev_device *dev) {
                 return -ENOMEM;
 
         assert(sysfs[0] == '/');
-        if (!(e = unit_name_escape_path(sysfs+1, ".device")))
+        if (!(e = unit_name_build_escape(sysfs+1, NULL, ".device")))
                 return -ENOMEM;
 
         u = manager_get_unit(m, e);
@@ -476,6 +449,10 @@ fail:
 const UnitVTable device_vtable = {
         .suffix = ".device",
 
+        .no_requires = true,
+        .no_instances = true,
+        .no_snapshots = true,
+
         .init = device_init,
         .load = unit_load_fragment_and_dropin_optional,
         .done = device_done,