libudev: make libudev-enumerate a thin wrapper around sd-device

1 files changed, 106 insertions, 686 deletions

diff --git a/src/libudev/libudev-enumerate.c b/src/libudev/libudev-enumerate.c
index 4e6e47cdeb..290c3dae42 100644
--- a/src/libudev/libudev-enumerate.c
+++ b/src/libudev/libudev-enumerate.c
@@ -2,6 +2,7 @@
   This file is part of systemd.
 
   Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
+  Copyright 2015 Tom Gundersen <teg@jklm.no>
 
   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
@@ -28,7 +29,11 @@
 #include <sys/stat.h>
 
 #include "libudev.h"
-#include "libudev-private.h"
+#include "libudev-device-internal.h"
+#include "sd-device.h"
+#include "device-util.h"
+#include "device-enumerator-private.h"
+
 
 /**
  * SECTION:libudev-enumerate
@@ -38,11 +43,6 @@
  * and return a sorted list of devices.
  */
 
-struct syspath {
-        char *syspath;
-        size_t len;
-};
-
 /**
  * udev_enumerate:
  *
@@ -51,20 +51,10 @@ struct syspath {
 struct udev_enumerate {
         struct udev *udev;
         int refcount;
-        struct udev_list sysattr_match_list;
-        struct udev_list sysattr_nomatch_list;
-        struct udev_list subsystem_match_list;
-        struct udev_list subsystem_nomatch_list;
-        struct udev_list sysname_match_list;
-        struct udev_list properties_match_list;
-        struct udev_list tags_match_list;
-        struct udev_device *parent_match;
         struct udev_list devices_list;
-        struct syspath *devices;
-        unsigned int devices_cur;
-        unsigned int devices_max;
         bool devices_uptodate:1;
-        bool match_is_initialized;
+
+        sd_device_enumerator *enumerator;
 };
 
 /**
@@ -75,25 +65,30 @@ struct udev_enumerate {
  *
  * Returns: an enumeration context.
  **/
-_public_ struct udev_enumerate *udev_enumerate_new(struct udev *udev)
-{
+_public_ struct udev_enumerate *udev_enumerate_new(struct udev *udev) {
         struct udev_enumerate *udev_enumerate;
+        int r;
+
+        assert_return_errno(udev, NULL, EINVAL);
 
-        if (udev == NULL)
-                return NULL;
         udev_enumerate = new0(struct udev_enumerate, 1);
-        if (udev_enumerate == NULL)
+        if (!udev_enumerate) {
+                errno = ENOMEM;
+                return NULL;
+        }
+
+        r = sd_device_enumerator_new(&udev_enumerate->enumerator);
+        if (r < 0) {
+                free(udev_enumerate);
+                errno = -r;
                 return NULL;
+        }
+
         udev_enumerate->refcount = 1;
         udev_enumerate->udev = udev;
-        udev_list_init(udev, &udev_enumerate->sysattr_match_list, false);
-        udev_list_init(udev, &udev_enumerate->sysattr_nomatch_list, false);
-        udev_list_init(udev, &udev_enumerate->subsystem_match_list, true);
-        udev_list_init(udev, &udev_enumerate->subsystem_nomatch_list, true);
-        udev_list_init(udev, &udev_enumerate->sysname_match_list, true);
-        udev_list_init(udev, &udev_enumerate->properties_match_list, false);
-        udev_list_init(udev, &udev_enumerate->tags_match_list, true);
+
         udev_list_init(udev, &udev_enumerate->devices_list, false);
+
         return udev_enumerate;
 }
 
@@ -105,11 +100,10 @@ _public_ struct udev_enumerate *udev_enumerate_new(struct udev *udev)
  *
  * Returns: the passed enumeration context
  **/
-_public_ struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate)
-{
-        if (udev_enumerate == NULL)
-                return NULL;
-        udev_enumerate->refcount++;
+_public_ struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate) {
+        if (udev_enumerate)
+                udev_enumerate->refcount ++;
+
         return udev_enumerate;
 }
 
@@ -122,28 +116,13 @@ _public_ struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_e
  *
  * Returns: #NULL
  **/
-_public_ struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
-{
-        unsigned int i;
+_public_ struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev_enumerate) {
+        if (udev_enumerate && (-- udev_enumerate->refcount) == 0) {
+                udev_list_cleanup(&udev_enumerate->devices_list);
+                sd_device_enumerator_unref(udev_enumerate->enumerator);
+                free(udev_enumerate);
+        }
 
-        if (udev_enumerate == NULL)
-                return NULL;
-        udev_enumerate->refcount--;
-        if (udev_enumerate->refcount > 0)
-                return NULL;
-        udev_list_cleanup(&udev_enumerate->sysattr_match_list);
-        udev_list_cleanup(&udev_enumerate->sysattr_nomatch_list);
-        udev_list_cleanup(&udev_enumerate->subsystem_match_list);
-        udev_list_cleanup(&udev_enumerate->subsystem_nomatch_list);
-        udev_list_cleanup(&udev_enumerate->sysname_match_list);
-        udev_list_cleanup(&udev_enumerate->properties_match_list);
-        udev_list_cleanup(&udev_enumerate->tags_match_list);
-        udev_device_unref(udev_enumerate->parent_match);
-        udev_list_cleanup(&udev_enumerate->devices_list);
-        for (i = 0; i < udev_enumerate->devices_cur; i++)
-                free(udev_enumerate->devices[i].syspath);
-        free(udev_enumerate->devices);
-        free(udev_enumerate);
         return NULL;
 }
 
@@ -155,103 +134,10 @@ _public_ struct udev_enumerate *udev_enumerate_unref(struct udev_enumerate *udev
  *
  * Returns: a pointer to the context.
  */
-_public_ struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate)
-{
-        if (udev_enumerate == NULL)
-                return NULL;
-        return udev_enumerate->udev;
-}
-
-static int syspath_add(struct udev_enumerate *udev_enumerate, const char *syspath)
-{
-        char *path;
-        struct syspath *entry;
-
-        /* double array size if needed */
-        if (udev_enumerate->devices_cur >= udev_enumerate->devices_max) {
-                struct syspath *buf;
-                unsigned int add;
-
-                add = udev_enumerate->devices_max;
-                if (add < 1024)
-                        add = 1024;
-                buf = realloc(udev_enumerate->devices, (udev_enumerate->devices_max + add) * sizeof(struct syspath));
-                if (buf == NULL)
-                        return -ENOMEM;
-                udev_enumerate->devices = buf;
-                udev_enumerate->devices_max += add;
-        }
-
-        path = strdup(syspath);
-        if (path == NULL)
-                return -ENOMEM;
-        entry = &udev_enumerate->devices[udev_enumerate->devices_cur];
-        entry->syspath = path;
-        entry->len = strlen(path);
-        udev_enumerate->devices_cur++;
-        udev_enumerate->devices_uptodate = false;
-        return 0;
-}
-
-static int syspath_cmp(const void *p1, const void *p2)
-{
-        const struct syspath *path1 = p1;
-        const struct syspath *path2 = p2;
-        size_t len;
-        int ret;
-
-        len = MIN(path1->len, path2->len);
-        ret = memcmp(path1->syspath, path2->syspath, len);
-        if (ret == 0) {
-                if (path1->len < path2->len)
-                        ret = -1;
-                else if (path1->len > path2->len)
-                        ret = 1;
-        }
-        return ret;
-}
-
-/* For devices that should be moved to the absolute end of the list */
-static bool devices_delay_end(struct udev *udev, const char *syspath)
-{
-        static const char *delay_device_list[] = {
-                "/block/md",
-                "/block/dm-",
-                NULL
-        };
-        int i;
-
-        for (i = 0; delay_device_list[i] != NULL; i++) {
-                if (strstr(syspath + strlen("/sys"), delay_device_list[i]) != NULL)
-                        return true;
-        }
-        return false;
-}
-
-/* For devices that should just be moved a little bit later, just
- * before the point where some common path prefix changes. Returns the
- * number of characters that make up that common prefix */
-static size_t devices_delay_later(struct udev *udev, const char *syspath)
-{
-        const char *c;
-
-        /* For sound cards the control device must be enumerated last
-         * to make sure it's the final device node that gets ACLs
-         * applied. Applications rely on this fact and use ACL changes
-         * on the control node as an indicator that the ACL change of
-         * the entire sound card completed. The kernel makes this
-         * guarantee when creating those devices, and hence we should
-         * too when enumerating them. */
-
-        if ((c = strstr(syspath, "/sound/card"))) {
-                c += 11;
-                c += strcspn(c, "/");
-
-                if (startswith(c, "/controlC"))
-                        return c - syspath + 1;
-        }
+_public_ struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate) {
+        assert_return_errno(udev_enumerate, NULL, EINVAL);
 
-        return 0;
+        return udev_enumerate->udev;
 }
 
 /**
@@ -262,77 +148,30 @@ static size_t devices_delay_later(struct udev *udev, const char *syspath)
  *
  * Returns: a udev_list_entry.
  */
-_public_ struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate)
-{
-        if (udev_enumerate == NULL)
-                return NULL;
+_public_ struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate) {
+        assert_return_errno(udev_enumerate, NULL, EINVAL);
+
         if (!udev_enumerate->devices_uptodate) {
-                unsigned int i;
-                int move_later = -1;
-                unsigned int max;
-                struct syspath *prev = NULL;
-                size_t move_later_prefix = 0;
+                sd_device *device;
 
                 udev_list_cleanup(&udev_enumerate->devices_list);
-                qsort_safe(udev_enumerate->devices, udev_enumerate->devices_cur, sizeof(struct syspath), syspath_cmp);
-
-                max = udev_enumerate->devices_cur;
-                for (i = 0; i < max; i++) {
-                        struct syspath *entry = &udev_enumerate->devices[i];
-
-                        /* skip duplicated entries */
-                        if (prev != NULL &&
-                            entry->len == prev->len &&
-                            memcmp(entry->syspath, prev->syspath, entry->len) == 0)
-                                continue;
-                        prev = entry;
-
-                        /* skip to be delayed devices, and add them to the end of the list */
-                        if (devices_delay_end(udev_enumerate->udev, entry->syspath)) {
-                                syspath_add(udev_enumerate, entry->syspath);
-                                /* need to update prev here for the case realloc() gives a different address */
-                                prev = &udev_enumerate->devices[i];
-                                continue;
-                        }
 
-                        /* skip to be delayed devices, and move the to
-                         * the point where the prefix changes. We can
-                         * only move one item at a time. */
-                        if (move_later == -1) {
-                                move_later_prefix = devices_delay_later(udev_enumerate->udev, entry->syspath);
+                FOREACH_DEVICE_AND_SUBSYSTEM(udev_enumerate->enumerator, device) {
+                        const char *syspath;
+                        int r;
 
-                                if (move_later_prefix > 0) {
-                                        move_later = i;
-                                        continue;
-                                }
+                        r = sd_device_get_syspath(device, &syspath);
+                        if (r < 0) {
+                                errno = -r;
+                                return NULL;
                         }
 
-                        if ((move_later >= 0) &&
-                             !strneq(entry->syspath, udev_enumerate->devices[move_later].syspath, move_later_prefix)) {
-
-                                udev_list_entry_add(&udev_enumerate->devices_list,
-                                                    udev_enumerate->devices[move_later].syspath, NULL);
-                                move_later = -1;
-                        }
-
-                        udev_list_entry_add(&udev_enumerate->devices_list, entry->syspath, NULL);
-                }
-
-                if (move_later >= 0)
-                        udev_list_entry_add(&udev_enumerate->devices_list,
-                                            udev_enumerate->devices[move_later].syspath, NULL);
-
-                /* add and cleanup delayed devices from end of list */
-                for (i = max; i < udev_enumerate->devices_cur; i++) {
-                        struct syspath *entry = &udev_enumerate->devices[i];
-
-                        udev_list_entry_add(&udev_enumerate->devices_list, entry->syspath, NULL);
-                        free(entry->syspath);
+                        udev_list_entry_add(&udev_enumerate->devices_list, syspath, NULL);
                 }
-                udev_enumerate->devices_cur = max;
 
                 udev_enumerate->devices_uptodate = true;
         }
+
         return udev_list_get_entry(&udev_enumerate->devices_list);
 }
 
@@ -345,15 +184,10 @@ _public_ struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enume
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (subsystem == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->subsystem_match_list, subsystem, NULL) == NULL)
-                return -ENOMEM;
-        return 0;
+_public_ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_subsystem(udev_enumerate->enumerator, subsystem, true);
 }
 
 /**
@@ -365,15 +199,10 @@ _public_ int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enum
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (subsystem == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->subsystem_nomatch_list, subsystem, NULL) == NULL)
-                return -ENOMEM;
-        return 0;
+_public_ int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_subsystem(udev_enumerate->enumerator, subsystem, false);
 }
 
 /**
@@ -386,15 +215,10 @@ _public_ int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_en
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (sysattr == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->sysattr_match_list, sysattr, value) == NULL)
-                return -ENOMEM;
-        return 0;
+_public_ int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_sysattr(udev_enumerate->enumerator, sysattr, value, true);
 }
 
 /**
@@ -407,35 +231,10 @@ _public_ int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumer
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (sysattr == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->sysattr_nomatch_list, sysattr, value) == NULL)
-                return -ENOMEM;
-        return 0;
-}
+_public_ int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) {
+        assert_return(udev_enumerate, -EINVAL);
 
-static int match_sysattr_value(struct udev_device *dev, const char *sysattr, const char *match_val)
-{
-        const char *val = NULL;
-        bool match = false;
-
-        val = udev_device_get_sysattr_value(dev, sysattr);
-        if (val == NULL)
-                goto exit;
-        if (match_val == NULL) {
-                match = true;
-                goto exit;
-        }
-        if (fnmatch(match_val, val, 0) == 0) {
-                match = true;
-                goto exit;
-        }
-exit:
-        return match;
+        return sd_device_enumerator_add_match_sysattr(udev_enumerate->enumerator, sysattr, value, false);
 }
 
 /**
@@ -448,15 +247,10 @@ exit:
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (property == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->properties_match_list, property, value) == NULL)
-                return -ENOMEM;
-        return 0;
+_public_ int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_property(udev_enumerate->enumerator, property, value);
 }
 
 /**
@@ -468,15 +262,10 @@ _public_ int udev_enumerate_add_match_property(struct udev_enumerate *udev_enume
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate, const char *tag)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (tag == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->tags_match_list, tag, NULL) == NULL)
-                return -ENOMEM;
-        return 0;
+_public_ int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate, const char *tag) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_tag(udev_enumerate->enumerator, tag);
 }
 
 /**
@@ -492,16 +281,13 @@ _public_ int udev_enumerate_add_match_tag(struct udev_enumerate *udev_enumerate,
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *parent)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (parent == NULL)
+_public_ int udev_enumerate_add_match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *parent) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        if (!parent)
                 return 0;
-        if (udev_enumerate->parent_match != NULL)
-                udev_device_unref(udev_enumerate->parent_match);
-        udev_enumerate->parent_match = udev_device_ref(parent);
-        return 0;
+
+        return sd_device_enumerator_add_match_parent(udev_enumerate->enumerator, parent->device);
 }
 
 /**
@@ -522,12 +308,10 @@ _public_ int udev_enumerate_add_match_parent(struct udev_enumerate *udev_enumera
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev_enumerate)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        udev_enumerate->match_is_initialized = true;
-        return 0;
+_public_ int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev_enumerate) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return sd_device_enumerator_add_match_is_initialized(udev_enumerate->enumerator);
 }
 
 /**
@@ -539,224 +323,10 @@ _public_ int udev_enumerate_add_match_is_initialized(struct udev_enumerate *udev
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (sysname == NULL)
-                return 0;
-        if (udev_list_entry_add(&udev_enumerate->sysname_match_list, sysname, NULL) == NULL)
-                return -ENOMEM;
-        return 0;
-}
-
-static bool match_sysattr(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
-{
-        struct udev_list_entry *list_entry;
-
-        /* skip list */
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_nomatch_list)) {
-                if (match_sysattr_value(dev, udev_list_entry_get_name(list_entry),
-                                        udev_list_entry_get_value(list_entry)))
-                        return false;
-        }
-        /* include list */
-        if (udev_list_get_entry(&udev_enumerate->sysattr_match_list) != NULL) {
-                udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_match_list)) {
-                        /* anything that does not match, will make it FALSE */
-                        if (!match_sysattr_value(dev, udev_list_entry_get_name(list_entry),
-                                                 udev_list_entry_get_value(list_entry)))
-                                return false;
-                }
-                return true;
-        }
-        return true;
-}
+_public_ int udev_enumerate_add_match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname) {
+        assert_return(udev_enumerate, -EINVAL);
 
-static bool match_property(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
-{
-        struct udev_list_entry *list_entry;
-        bool match = false;
-
-        /* no match always matches */
-        if (udev_list_get_entry(&udev_enumerate->properties_match_list) == NULL)
-                return true;
-
-        /* loop over matches */
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->properties_match_list)) {
-                const char *match_key = udev_list_entry_get_name(list_entry);
-                const char *match_value = udev_list_entry_get_value(list_entry);
-                struct udev_list_entry *property_entry;
-
-                /* loop over device properties */
-                udev_list_entry_foreach(property_entry, udev_device_get_properties_list_entry(dev)) {
-                        const char *dev_key = udev_list_entry_get_name(property_entry);
-                        const char *dev_value = udev_list_entry_get_value(property_entry);
-
-                        if (fnmatch(match_key, dev_key, 0) != 0)
-                                continue;
-                        if (match_value == NULL && dev_value == NULL) {
-                                match = true;
-                                goto out;
-                        }
-                        if (match_value == NULL || dev_value == NULL)
-                                continue;
-                        if (fnmatch(match_value, dev_value, 0) == 0) {
-                                match = true;
-                                goto out;
-                        }
-                }
-        }
-out:
-        return match;
-}
-
-static bool match_tag(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
-{
-        struct udev_list_entry *list_entry;
-
-        /* no match always matches */
-        if (udev_list_get_entry(&udev_enumerate->tags_match_list) == NULL)
-                return true;
-
-        /* loop over matches */
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->tags_match_list))
-                if (!udev_device_has_tag(dev, udev_list_entry_get_name(list_entry)))
-                        return false;
-
-        return true;
-}
-
-static bool match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
-{
-        if (udev_enumerate->parent_match == NULL)
-                return true;
-
-        return startswith(udev_device_get_devpath(dev), udev_device_get_devpath(udev_enumerate->parent_match));
-}
-
-static bool match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname)
-{
-        struct udev_list_entry *list_entry;
-
-        if (udev_list_get_entry(&udev_enumerate->sysname_match_list) == NULL)
-                return true;
-
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysname_match_list)) {
-                if (fnmatch(udev_list_entry_get_name(list_entry), sysname, 0) != 0)
-                        continue;
-                return true;
-        }
-        return false;
-}
-
-static int scan_dir_and_add_devices(struct udev_enumerate *udev_enumerate,
-                                    const char *basedir, const char *subdir1, const char *subdir2)
-{
-        char path[UTIL_PATH_SIZE];
-        size_t l;
-        char *s;
-        DIR *dir;
-        struct dirent *dent;
-
-        s = path;
-        l = strpcpyl(&s, sizeof(path), "/sys/", basedir, NULL);
-        if (subdir1 != NULL)
-                l = strpcpyl(&s, l, "/", subdir1, NULL);
-        if (subdir2 != NULL)
-                strpcpyl(&s, l, "/", subdir2, NULL);
-        dir = opendir(path);
-        if (dir == NULL)
-                return -ENOENT;
-        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
-                char syspath[UTIL_PATH_SIZE];
-                struct udev_device *dev;
-
-                if (dent->d_name[0] == '.')
-                        continue;
-
-                if (!match_sysname(udev_enumerate, dent->d_name))
-                        continue;
-
-                strscpyl(syspath, sizeof(syspath), path, "/", dent->d_name, NULL);
-                dev = udev_device_new_from_syspath(udev_enumerate->udev, syspath);
-                if (dev == NULL)
-                        continue;
-
-                if (udev_enumerate->match_is_initialized) {
-                        /*
-                         * All devices with a device node or network interfaces
-                         * possibly need udev to adjust the device node permission
-                         * or context, or rename the interface before it can be
-                         * reliably used from other processes.
-                         *
-                         * For now, we can only check these types of devices, we
-                         * might not store a database, and have no way to find out
-                         * for all other types of devices.
-                         */
-                        if (!udev_device_get_is_initialized(dev) &&
-                            (major(udev_device_get_devnum(dev)) > 0 || udev_device_get_ifindex(dev) > 0))
-                                goto nomatch;
-                }
-                if (!match_parent(udev_enumerate, dev))
-                        goto nomatch;
-                if (!match_tag(udev_enumerate, dev))
-                        goto nomatch;
-                if (!match_property(udev_enumerate, dev))
-                        goto nomatch;
-                if (!match_sysattr(udev_enumerate, dev))
-                        goto nomatch;
-
-                syspath_add(udev_enumerate, udev_device_get_syspath(dev));
-nomatch:
-                udev_device_unref(dev);
-        }
-        closedir(dir);
-        return 0;
-}
-
-static bool match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem)
-{
-        struct udev_list_entry *list_entry;
-
-        if (!subsystem)
-                return false;
-
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_nomatch_list)) {
-                if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
-                        return false;
-        }
-
-        if (udev_list_get_entry(&udev_enumerate->subsystem_match_list) != NULL) {
-                udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_match_list)) {
-                        if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0)
-                                return true;
-                }
-                return false;
-        }
-
-        return true;
-}
-
-static int scan_dir(struct udev_enumerate *udev_enumerate, const char *basedir, const char *subdir, const char *subsystem)
-{
-        char path[UTIL_PATH_SIZE];
-        DIR *dir;
-        struct dirent *dent;
-
-        strscpyl(path, sizeof(path), "/sys/", basedir, NULL);
-        dir = opendir(path);
-        if (dir == NULL)
-                return -1;
-        for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
-                if (dent->d_name[0] == '.')
-                        continue;
-                if (!match_subsystem(udev_enumerate, subsystem != NULL ? subsystem : dent->d_name))
-                        continue;
-                scan_dir_and_add_devices(udev_enumerate, basedir, dent->d_name, subdir);
-        }
-        closedir(dir);
-        return 0;
+        return sd_device_enumerator_add_match_sysname(udev_enumerate->enumerator, sysname);
 }
 
 /**
@@ -768,141 +338,23 @@ static int scan_dir(struct udev_enumerate *udev_enumerate, const char *basedir,
  *
  * Returns: 0 on success, otherwise a negative error value.
  */
-_public_ int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath)
-{
-        struct udev_device *udev_device;
-
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-        if (syspath == NULL)
-                return 0;
-        /* resolve to real syspath */
-        udev_device = udev_device_new_from_syspath(udev_enumerate->udev, syspath);
-        if (udev_device == NULL)
-                return -EINVAL;
-        syspath_add(udev_enumerate, udev_device_get_syspath(udev_device));
-        udev_device_unref(udev_device);
-        return 0;
-}
-
-static int scan_devices_tags(struct udev_enumerate *udev_enumerate)
-{
-        struct udev_list_entry *list_entry;
-
-        /* scan only tagged devices, use tags reverse-index, instead of searching all devices in /sys */
-        udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->tags_match_list)) {
-                DIR *dir;
-                struct dirent *dent;
-                char path[UTIL_PATH_SIZE];
-
-                strscpyl(path, sizeof(path), "/run/udev/tags/", udev_list_entry_get_name(list_entry), NULL);
-                dir = opendir(path);
-                if (dir == NULL)
-                        continue;
-                for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
-                        struct udev_device *dev;
-
-                        if (dent->d_name[0] == '.')
-                                continue;
-
-                        dev = udev_device_new_from_device_id(udev_enumerate->udev, dent->d_name);
-                        if (dev == NULL)
-                                continue;
-
-                        if (!match_subsystem(udev_enumerate, udev_device_get_subsystem(dev)))
-                                goto nomatch;
-                        if (!match_sysname(udev_enumerate, udev_device_get_sysname(dev)))
-                                goto nomatch;
-                        if (!match_parent(udev_enumerate, dev))
-                                goto nomatch;
-                        if (!match_property(udev_enumerate, dev))
-                                goto nomatch;
-                        if (!match_sysattr(udev_enumerate, dev))
-                                goto nomatch;
-
-                        syspath_add(udev_enumerate, udev_device_get_syspath(dev));
-nomatch:
-                        udev_device_unref(dev);
-                }
-                closedir(dir);
-        }
-        return 0;
-}
+_public_ int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath) {
+        _cleanup_device_unref_ sd_device *device = NULL;
+        int r;
 
-static int parent_add_child(struct udev_enumerate *enumerate, const char *path)
-{
-        struct udev_device *dev;
-        int r = 0;
-
-        dev = udev_device_new_from_syspath(enumerate->udev, path);
-        if (dev == NULL)
-                return -ENODEV;
-
-        if (!match_subsystem(enumerate, udev_device_get_subsystem(dev)))
-                goto nomatch;
-        if (!match_sysname(enumerate, udev_device_get_sysname(dev)))
-                goto nomatch;
-        if (!match_property(enumerate, dev))
-                goto nomatch;
-        if (!match_sysattr(enumerate, dev))
-                goto nomatch;
-
-        syspath_add(enumerate, udev_device_get_syspath(dev));
-        r = 1;
-
-nomatch:
-        udev_device_unref(dev);
-        return r;
-}
+        assert_return(udev_enumerate, -EINVAL);
 
-static int parent_crawl_children(struct udev_enumerate *enumerate, const char *path, int maxdepth)
-{
-        DIR *d;
-        struct dirent *dent;
-
-        d = opendir(path);
-        if (d == NULL)
-                return -errno;
-
-        for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
-                char *child;
-
-                if (dent->d_name[0] == '.')
-                        continue;
-                if (dent->d_type != DT_DIR)
-                        continue;
-                if (asprintf(&child, "%s/%s", path, dent->d_name) < 0)
-                        continue;
-                parent_add_child(enumerate, child);
-                if (maxdepth > 0)
-                        parent_crawl_children(enumerate, child, maxdepth-1);
-                free(child);
-        }
-
-        closedir(d);
-        return 0;
-}
-
-static int scan_devices_children(struct udev_enumerate *enumerate)
-{
-        const char *path;
+        if (!syspath)
+                return 0;
 
-        path = udev_device_get_syspath(enumerate->parent_match);
-        parent_add_child(enumerate, path);
-        return parent_crawl_children(enumerate, path, 256);
-}
+        r = sd_device_new_from_syspath(&device, syspath);
+        if (r < 0)
+                return r;
 
-static int scan_devices_all(struct udev_enumerate *udev_enumerate)
-{
-        struct stat statbuf;
+        r = sd_device_enumerator_add_device(udev_enumerate->enumerator, device);
+        if (r < 0)
+                return r;
 
-        if (stat("/sys/subsystem", &statbuf) == 0) {
-                /* we have /subsystem/, forget all the old stuff */
-                scan_dir(udev_enumerate, "subsystem", "devices", NULL);
-        } else {
-                scan_dir(udev_enumerate, "bus", "devices", NULL);
-                scan_dir(udev_enumerate, "class", NULL, NULL);
-        }
         return 0;
 }
 
@@ -915,21 +367,10 @@ static int scan_devices_all(struct udev_enumerate *udev_enumerate)
  *
  * Returns: 0 on success, otherwise a negative error value.
  **/
-_public_ int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
-{
-        if (udev_enumerate == NULL)
-                return -EINVAL;
+_public_ int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate) {
+        assert_return(udev_enumerate, -EINVAL);
 
-        /* efficiently lookup tags only, we maintain a reverse-index */
-        if (udev_list_get_entry(&udev_enumerate->tags_match_list) != NULL)
-                return scan_devices_tags(udev_enumerate);
-
-        /* walk the subtree of one parent device only */
-        if (udev_enumerate->parent_match != NULL)
-                return scan_devices_children(udev_enumerate);
-
-        /* scan devices of all subsystems */
-        return scan_devices_all(udev_enumerate);
+        return device_enumerator_scan_devices(udev_enumerate->enumerator);
 }
 
 /**
@@ -940,29 +381,8 @@ _public_ int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
  *
  * Returns: 0 on success, otherwise a negative error value.
  **/
-_public_ int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate)
-{
-        struct stat statbuf;
-        const char *subsysdir;
-
-        if (udev_enumerate == NULL)
-                return -EINVAL;
-
-        /* all kernel modules */
-        if (match_subsystem(udev_enumerate, "module"))
-                scan_dir_and_add_devices(udev_enumerate, "module", NULL, NULL);
-
-        if (stat("/sys/subsystem", &statbuf) == 0)
-                subsysdir = "subsystem";
-        else
-                subsysdir = "bus";
-
-        /* all subsystems (only buses support coldplug) */
-        if (match_subsystem(udev_enumerate, "subsystem"))
-                scan_dir_and_add_devices(udev_enumerate, subsysdir, NULL, NULL);
-
-        /* all subsystem drivers */
-        if (match_subsystem(udev_enumerate, "drivers"))
-                scan_dir(udev_enumerate, subsysdir, "drivers", "drivers");
-        return 0;
+_public_ int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate) {
+        assert_return(udev_enumerate, -EINVAL);
+
+        return device_enumerator_scan_subsystems(udev_enumerate->enumerator);
 }