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-rw-r--r--src/libsystemd/sd-device/device-private.c966
1 files changed, 966 insertions, 0 deletions
diff --git a/src/libsystemd/sd-device/device-private.c b/src/libsystemd/sd-device/device-private.c
new file mode 100644
index 0000000..bc7a838
--- /dev/null
+++ b/src/libsystemd/sd-device/device-private.c
@@ -0,0 +1,966 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <ctype.h>
+#include <net/if.h>
+#include <sys/types.h>
+
+#include "sd-device.h"
+
+#include "alloc-util.h"
+#include "device-internal.h"
+#include "device-private.h"
+#include "device-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "hashmap.h"
+#include "macro.h"
+#include "mkdir.h"
+#include "nulstr-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "set.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "strxcpyx.h"
+#include "tmpfile-util.h"
+#include "user-util.h"
+
+int device_add_property(sd_device *device, const char *key, const char *value) {
+ int r;
+
+ assert(device);
+ assert(key);
+
+ r = device_add_property_aux(device, key, value, false);
+ if (r < 0)
+ return r;
+
+ if (key[0] != '.') {
+ r = device_add_property_aux(device, key, value, true);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int device_add_propertyf(sd_device *device, const char *key, const char *format, ...) {
+ _cleanup_free_ char *value = NULL;
+ va_list ap;
+ int r;
+
+ assert(device);
+ assert(key);
+
+ if (!format)
+ return device_add_property(device, key, NULL);
+
+ va_start(ap, format);
+ r = vasprintf(&value, format, ap);
+ va_end(ap);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ return device_add_property(device, key, value);
+}
+
+void device_set_devlink_priority(sd_device *device, int priority) {
+ assert(device);
+
+ device->devlink_priority = priority;
+}
+
+void device_set_is_initialized(sd_device *device) {
+ assert(device);
+
+ device->is_initialized = true;
+}
+
+int device_ensure_usec_initialized(sd_device *device, sd_device *device_old) {
+ usec_t when;
+
+ assert(device);
+
+ if (device_old && device_old->usec_initialized > 0)
+ when = device_old->usec_initialized;
+ else
+ when = now(CLOCK_MONOTONIC);
+
+ return device_set_usec_initialized(device, when);
+}
+
+uint64_t device_get_properties_generation(sd_device *device) {
+ assert(device);
+
+ return device->properties_generation;
+}
+
+uint64_t device_get_tags_generation(sd_device *device) {
+ assert(device);
+
+ return device->tags_generation;
+}
+
+uint64_t device_get_devlinks_generation(sd_device *device) {
+ assert(device);
+
+ return device->devlinks_generation;
+}
+
+int device_get_devnode_mode(sd_device *device, mode_t *ret) {
+ int r;
+
+ assert(device);
+
+ r = device_read_db(device);
+ if (r < 0)
+ return r;
+
+ if (device->devmode == MODE_INVALID)
+ return -ENOENT;
+
+ if (ret)
+ *ret = device->devmode;
+
+ return 0;
+}
+
+int device_get_devnode_uid(sd_device *device, uid_t *ret) {
+ int r;
+
+ assert(device);
+
+ r = device_read_db(device);
+ if (r < 0)
+ return r;
+
+ if (device->devuid == UID_INVALID)
+ return -ENOENT;
+
+ if (ret)
+ *ret = device->devuid;
+
+ return 0;
+}
+
+static int device_set_devuid(sd_device *device, const char *uid) {
+ uid_t u;
+ int r;
+
+ assert(device);
+ assert(uid);
+
+ r = parse_uid(uid, &u);
+ if (r < 0)
+ return r;
+
+ r = device_add_property_internal(device, "DEVUID", uid);
+ if (r < 0)
+ return r;
+
+ device->devuid = u;
+
+ return 0;
+}
+
+int device_get_devnode_gid(sd_device *device, gid_t *ret) {
+ int r;
+
+ assert(device);
+
+ r = device_read_db(device);
+ if (r < 0)
+ return r;
+
+ if (device->devgid == GID_INVALID)
+ return -ENOENT;
+
+ if (ret)
+ *ret = device->devgid;
+
+ return 0;
+}
+
+static int device_set_devgid(sd_device *device, const char *gid) {
+ gid_t g;
+ int r;
+
+ assert(device);
+ assert(gid);
+
+ r = parse_gid(gid, &g);
+ if (r < 0)
+ return r;
+
+ r = device_add_property_internal(device, "DEVGID", gid);
+ if (r < 0)
+ return r;
+
+ device->devgid = g;
+
+ return 0;
+}
+
+int device_set_action(sd_device *device, sd_device_action_t a) {
+ int r;
+
+ assert(device);
+ assert(a >= 0 && a < _SD_DEVICE_ACTION_MAX);
+
+ r = device_add_property_internal(device, "ACTION", device_action_to_string(a));
+ if (r < 0)
+ return r;
+
+ device->action = a;
+
+ return 0;
+}
+
+static int device_set_action_from_string(sd_device *device, const char *action) {
+ sd_device_action_t a;
+
+ assert(device);
+ assert(action);
+
+ a = device_action_from_string(action);
+ if (a < 0)
+ return a;
+
+ return device_set_action(device, a);
+}
+
+static int device_set_seqnum(sd_device *device, const char *str) {
+ uint64_t seqnum;
+ int r;
+
+ assert(device);
+ assert(str);
+
+ r = safe_atou64(str, &seqnum);
+ if (r < 0)
+ return r;
+ if (seqnum == 0)
+ return -EINVAL;
+
+ r = device_add_property_internal(device, "SEQNUM", str);
+ if (r < 0)
+ return r;
+
+ device->seqnum = seqnum;
+
+ return 0;
+}
+
+static int device_amend(sd_device *device, const char *key, const char *value) {
+ int r;
+
+ assert(device);
+ assert(key);
+ assert(value);
+
+ if (streq(key, "DEVPATH")) {
+ char *path;
+
+ path = strjoina("/sys", value);
+
+ /* the caller must verify or trust this data (e.g., if it comes from the kernel) */
+ r = device_set_syspath(device, path, false);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set syspath to '%s': %m", path);
+ } else if (streq(key, "SUBSYSTEM")) {
+ r = device_set_subsystem(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set subsystem to '%s': %m", value);
+ } else if (streq(key, "DEVTYPE")) {
+ r = device_set_devtype(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devtype to '%s': %m", value);
+ } else if (streq(key, "DEVNAME")) {
+ r = device_set_devname(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devname to '%s': %m", value);
+ } else if (streq(key, "USEC_INITIALIZED")) {
+ usec_t t;
+
+ r = safe_atou64(value, &t);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to parse timestamp '%s': %m", value);
+
+ r = device_set_usec_initialized(device, t);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set usec-initialized to '%s': %m", value);
+ } else if (streq(key, "DRIVER")) {
+ r = device_set_driver(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set driver to '%s': %m", value);
+ } else if (streq(key, "IFINDEX")) {
+ r = device_set_ifindex(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set ifindex to '%s': %m", value);
+ } else if (streq(key, "DEVMODE")) {
+ r = device_set_devmode(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devmode to '%s': %m", value);
+ } else if (streq(key, "DEVUID")) {
+ r = device_set_devuid(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devuid to '%s': %m", value);
+ } else if (streq(key, "DEVGID")) {
+ r = device_set_devgid(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devgid to '%s': %m", value);
+ } else if (streq(key, "ACTION")) {
+ r = device_set_action_from_string(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set action to '%s': %m", value);
+ } else if (streq(key, "SEQNUM")) {
+ r = device_set_seqnum(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set SEQNUM to '%s': %m", value);
+ } else if (streq(key, "DISKSEQ")) {
+ r = device_set_diskseq(device, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set DISKSEQ to '%s': %m", value);
+ } else if (streq(key, "DEVLINKS")) {
+ for (const char *p = value;;) {
+ _cleanup_free_ char *word = NULL;
+
+ /* udev rules may set escaped strings, and sd-device does not modify the input
+ * strings. So, it is also necessary to keep the strings received through
+ * sd-device-monitor. */
+ r = extract_first_word(&p, &word, NULL, EXTRACT_RETAIN_ESCAPE);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = device_add_devlink(device, word);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to add devlink '%s': %m", word);
+ }
+ } else if (STR_IN_SET(key, "TAGS", "CURRENT_TAGS")) {
+ for (const char *p = value;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&p, &word, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = device_add_tag(device, word, streq(key, "CURRENT_TAGS"));
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to add tag '%s': %m", word);
+ }
+ } else if (streq(key, "UDEV_DATABASE_VERSION")) {
+ r = safe_atou(value, &device->database_version);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to parse udev database version '%s': %m", value);
+ } else {
+ r = device_add_property_internal(device, key, value);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to add property '%s=%s': %m", key, value);
+ }
+
+ return 0;
+}
+
+static int device_append(
+ sd_device *device,
+ char *key,
+ const char **_major,
+ const char **_minor) {
+
+ const char *major = NULL, *minor = NULL;
+ char *value;
+ int r;
+
+ assert(device);
+ assert(key);
+ assert(_major);
+ assert(_minor);
+
+ value = strchr(key, '=');
+ if (!value)
+ return log_device_debug_errno(device, SYNTHETIC_ERRNO(EINVAL),
+ "sd-device: Not a key-value pair: '%s'", key);
+
+ *value = '\0';
+
+ value++;
+
+ if (streq(key, "MAJOR"))
+ major = value;
+ else if (streq(key, "MINOR"))
+ minor = value;
+ else {
+ r = device_amend(device, key, value);
+ if (r < 0)
+ return r;
+ }
+
+ if (major)
+ *_major = major;
+
+ if (minor)
+ *_minor = minor;
+
+ return 0;
+}
+
+void device_seal(sd_device *device) {
+ assert(device);
+
+ device->sealed = true;
+}
+
+static int device_verify(sd_device *device) {
+ int r;
+
+ assert(device);
+
+ if (!device->devpath || !device->subsystem || device->action < 0 || device->seqnum == 0)
+ return log_device_debug_errno(device, SYNTHETIC_ERRNO(EINVAL),
+ "sd-device: Device created from strv or nulstr lacks devpath, subsystem, action or seqnum.");
+
+ if (streq(device->subsystem, "drivers")) {
+ r = device_set_drivers_subsystem(device);
+ if (r < 0)
+ return r;
+ }
+
+ device->sealed = true;
+
+ return 0;
+}
+
+int device_new_from_strv(sd_device **ret, char **strv) {
+ _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+ const char *major = NULL, *minor = NULL;
+ int r;
+
+ assert(ret);
+ assert(strv);
+
+ r = device_new_aux(&device);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(key, strv) {
+ r = device_append(device, *key, &major, &minor);
+ if (r < 0)
+ return r;
+ }
+
+ if (major) {
+ r = device_set_devnum(device, major, minor);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor);
+ }
+
+ r = device_verify(device);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(device);
+
+ return 0;
+}
+
+int device_new_from_nulstr(sd_device **ret, char *nulstr, size_t len) {
+ _cleanup_(sd_device_unrefp) sd_device *device = NULL;
+ const char *major = NULL, *minor = NULL;
+ int r;
+
+ assert(ret);
+ assert(nulstr);
+ assert(len);
+
+ r = device_new_aux(&device);
+ if (r < 0)
+ return r;
+
+ for (size_t i = 0; i < len; ) {
+ char *key;
+ const char *end;
+
+ key = nulstr + i;
+ end = memchr(key, '\0', len - i);
+ if (!end)
+ return log_device_debug_errno(device, SYNTHETIC_ERRNO(EINVAL),
+ "sd-device: Failed to parse nulstr");
+
+ i += end - key + 1;
+
+ /* netlink messages for some devices contain an unwanted newline at the end of value.
+ * Let's drop the newline and remaining characters after the newline. */
+ truncate_nl(key);
+
+ r = device_append(device, key, &major, &minor);
+ if (r < 0)
+ return r;
+ }
+
+ if (major) {
+ r = device_set_devnum(device, major, minor);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "sd-device: Failed to set devnum %s:%s: %m", major, minor);
+ }
+
+ r = device_verify(device);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(device);
+
+ return 0;
+}
+
+static int device_update_properties_bufs(sd_device *device) {
+ _cleanup_free_ char **buf_strv = NULL, *buf_nulstr = NULL;
+ size_t nulstr_len = 0, num = 0;
+ const char *val, *prop;
+
+ assert(device);
+
+ if (!device->properties_buf_outdated)
+ return 0;
+
+ /* append udev database version */
+ buf_nulstr = newdup(char, "UDEV_DATABASE_VERSION=" STRINGIFY(LATEST_UDEV_DATABASE_VERSION) "\0",
+ STRLEN("UDEV_DATABASE_VERSION=" STRINGIFY(LATEST_UDEV_DATABASE_VERSION)) + 2);
+ if (!buf_nulstr)
+ return -ENOMEM;
+
+ nulstr_len += STRLEN("UDEV_DATABASE_VERSION=" STRINGIFY(LATEST_UDEV_DATABASE_VERSION)) + 1;
+ num++;
+
+ FOREACH_DEVICE_PROPERTY(device, prop, val) {
+ size_t len = 0;
+
+ len = strlen(prop) + 1 + strlen(val);
+
+ buf_nulstr = GREEDY_REALLOC0(buf_nulstr, nulstr_len + len + 2);
+ if (!buf_nulstr)
+ return -ENOMEM;
+
+ strscpyl(buf_nulstr + nulstr_len, len + 1, prop, "=", val, NULL);
+ nulstr_len += len + 1;
+ num++;
+ }
+
+ /* build buf_strv from buf_nulstr */
+ buf_strv = new0(char*, num + 1);
+ if (!buf_strv)
+ return -ENOMEM;
+
+ size_t i = 0;
+ char *p;
+ NULSTR_FOREACH(p, buf_nulstr)
+ buf_strv[i++] = p;
+ assert(i == num);
+
+ free_and_replace(device->properties_nulstr, buf_nulstr);
+ device->properties_nulstr_len = nulstr_len;
+ free_and_replace(device->properties_strv, buf_strv);
+
+ device->properties_buf_outdated = false;
+ return 0;
+}
+
+int device_get_properties_nulstr(sd_device *device, const char **ret_nulstr, size_t *ret_len) {
+ int r;
+
+ assert(device);
+
+ r = device_update_properties_bufs(device);
+ if (r < 0)
+ return r;
+
+ if (ret_nulstr)
+ *ret_nulstr = device->properties_nulstr;
+ if (ret_len)
+ *ret_len = device->properties_nulstr_len;
+
+ return 0;
+}
+
+int device_get_properties_strv(sd_device *device, char ***ret) {
+ int r;
+
+ assert(device);
+
+ r = device_update_properties_bufs(device);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = device->properties_strv;
+
+ return 0;
+}
+
+int device_get_devlink_priority(sd_device *device, int *ret) {
+ int r;
+
+ assert(device);
+
+ r = device_read_db(device);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = device->devlink_priority;
+
+ return 0;
+}
+
+int device_rename(sd_device *device, const char *name) {
+ _cleanup_free_ char *new_syspath = NULL;
+ const char *interface;
+ int r;
+
+ assert(device);
+ assert(name);
+
+ if (!filename_is_valid(name))
+ return -EINVAL;
+
+ r = path_extract_directory(device->syspath, &new_syspath);
+ if (r < 0)
+ return r;
+
+ if (!path_extend(&new_syspath, name))
+ return -ENOMEM;
+
+ if (!path_is_safe(new_syspath))
+ return -EINVAL;
+
+ /* At the time this is called, the renamed device may not exist yet. Hence, we cannot validate
+ * the new syspath. */
+ r = device_set_syspath(device, new_syspath, false);
+ if (r < 0)
+ return r;
+
+ /* Here, only clear the sysname and sysnum. They will be set when requested. */
+ device->sysnum = NULL;
+ device->sysname = mfree(device->sysname);
+
+ r = sd_device_get_property_value(device, "INTERFACE", &interface);
+ if (r == -ENOENT)
+ return 0;
+ if (r < 0)
+ return r;
+
+ /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */
+ r = device_add_property_internal(device, "INTERFACE_OLD", interface);
+ if (r < 0)
+ return r;
+
+ return device_add_property_internal(device, "INTERFACE", name);
+}
+
+static int device_shallow_clone(sd_device *device, sd_device **ret) {
+ _cleanup_(sd_device_unrefp) sd_device *dest = NULL;
+ const char *val = NULL;
+ int r;
+
+ assert(device);
+ assert(ret);
+
+ r = device_new_aux(&dest);
+ if (r < 0)
+ return r;
+
+ r = device_set_syspath(dest, device->syspath, false);
+ if (r < 0)
+ return r;
+
+ (void) sd_device_get_subsystem(device, &val);
+ r = device_set_subsystem(dest, val);
+ if (r < 0)
+ return r;
+ if (streq_ptr(val, "drivers")) {
+ r = free_and_strdup(&dest->driver_subsystem, device->driver_subsystem);
+ if (r < 0)
+ return r;
+ }
+
+ /* The device may be already removed. Let's copy minimal set of information to make
+ * device_get_device_id() work without uevent file. */
+
+ if (sd_device_get_property_value(device, "IFINDEX", &val) >= 0) {
+ r = device_set_ifindex(dest, val);
+ if (r < 0)
+ return r;
+ }
+
+ if (sd_device_get_property_value(device, "MAJOR", &val) >= 0) {
+ const char *minor = NULL;
+
+ (void) sd_device_get_property_value(device, "MINOR", &minor);
+ r = device_set_devnum(dest, val, minor);
+ if (r < 0)
+ return r;
+ }
+
+ r = device_read_uevent_file(dest);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(dest);
+ return 0;
+}
+
+int device_clone_with_db(sd_device *device, sd_device **ret) {
+ _cleanup_(sd_device_unrefp) sd_device *dest = NULL;
+ int r;
+
+ assert(device);
+ assert(ret);
+
+ r = device_shallow_clone(device, &dest);
+ if (r < 0)
+ return r;
+
+ r = device_read_db(dest);
+ if (r < 0)
+ return r;
+
+ dest->sealed = true;
+
+ *ret = TAKE_PTR(dest);
+ return 0;
+}
+
+void device_cleanup_tags(sd_device *device) {
+ assert(device);
+
+ device->all_tags = set_free_free(device->all_tags);
+ device->current_tags = set_free_free(device->current_tags);
+ device->property_tags_outdated = true;
+ device->tags_generation++;
+}
+
+void device_cleanup_devlinks(sd_device *device) {
+ assert(device);
+
+ set_free_free(device->devlinks);
+ device->devlinks = NULL;
+ device->property_devlinks_outdated = true;
+ device->devlinks_generation++;
+}
+
+void device_remove_tag(sd_device *device, const char *tag) {
+ assert(device);
+ assert(tag);
+
+ free(set_remove(device->current_tags, tag));
+ device->property_tags_outdated = true;
+ device->tags_generation++;
+}
+
+static int device_tag(sd_device *device, const char *tag, bool add) {
+ const char *id;
+ char *path;
+ int r;
+
+ assert(device);
+ assert(tag);
+
+ r = device_get_device_id(device, &id);
+ if (r < 0)
+ return r;
+
+ path = strjoina("/run/udev/tags/", tag, "/", id);
+
+ if (add)
+ return touch_file(path, true, USEC_INFINITY, UID_INVALID, GID_INVALID, 0444);
+
+ if (unlink(path) < 0 && errno != ENOENT)
+ return -errno;
+
+ return 0;
+}
+
+int device_tag_index(sd_device *device, sd_device *device_old, bool add) {
+ const char *tag;
+ int r = 0, k;
+
+ if (add && device_old)
+ /* delete possible left-over tags */
+ FOREACH_DEVICE_TAG(device_old, tag)
+ if (!sd_device_has_tag(device, tag)) {
+ k = device_tag(device_old, tag, false);
+ if (r >= 0 && k < 0)
+ r = k;
+ }
+
+ FOREACH_DEVICE_TAG(device, tag) {
+ k = device_tag(device, tag, add);
+ if (r >= 0 && k < 0)
+ r = k;
+ }
+
+ return r;
+}
+
+static bool device_has_info(sd_device *device) {
+ assert(device);
+
+ if (!set_isempty(device->devlinks))
+ return true;
+
+ if (device->devlink_priority != 0)
+ return true;
+
+ if (!ordered_hashmap_isempty(device->properties_db))
+ return true;
+
+ if (!set_isempty(device->all_tags))
+ return true;
+
+ if (!set_isempty(device->current_tags))
+ return true;
+
+ return false;
+}
+
+void device_set_db_persist(sd_device *device) {
+ assert(device);
+
+ device->db_persist = true;
+}
+
+int device_update_db(sd_device *device) {
+ const char *id;
+ char *path;
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *path_tmp = NULL;
+ bool has_info;
+ int r;
+
+ assert(device);
+
+ has_info = device_has_info(device);
+
+ r = device_get_device_id(device, &id);
+ if (r < 0)
+ return r;
+
+ path = strjoina("/run/udev/data/", id);
+
+ /* do not store anything for otherwise empty devices */
+ if (!has_info && major(device->devnum) == 0 && device->ifindex == 0) {
+ if (unlink(path) < 0 && errno != ENOENT)
+ return -errno;
+
+ return 0;
+ }
+
+ /* write a database file */
+ r = mkdir_parents(path, 0755);
+ if (r < 0)
+ return r;
+
+ r = fopen_temporary(path, &f, &path_tmp);
+ if (r < 0)
+ return r;
+
+ /* set 'sticky' bit to indicate that we should not clean the database when we transition from initrd
+ * to the real root */
+ if (fchmod(fileno(f), device->db_persist ? 01644 : 0644) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (has_info) {
+ const char *property, *value, *tag;
+
+ if (major(device->devnum) > 0) {
+ const char *devlink;
+
+ FOREACH_DEVICE_DEVLINK(device, devlink)
+ fprintf(f, "S:%s\n", devlink + STRLEN("/dev/"));
+
+ if (device->devlink_priority != 0)
+ fprintf(f, "L:%i\n", device->devlink_priority);
+ }
+
+ if (device->usec_initialized > 0)
+ fprintf(f, "I:"USEC_FMT"\n", device->usec_initialized);
+
+ ORDERED_HASHMAP_FOREACH_KEY(value, property, device->properties_db)
+ fprintf(f, "E:%s=%s\n", property, value);
+
+ FOREACH_DEVICE_TAG(device, tag)
+ fprintf(f, "G:%s\n", tag); /* Any tag */
+
+ SET_FOREACH(tag, device->current_tags)
+ fprintf(f, "Q:%s\n", tag); /* Current tag */
+
+ /* Always write the latest database version here, instead of the value stored in
+ * device->database_version, as which may be 0. */
+ fputs("V:" STRINGIFY(LATEST_UDEV_DATABASE_VERSION) "\n", f);
+ }
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto fail;
+
+ if (rename(path_tmp, path) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ log_device_debug(device, "sd-device: Created %s file '%s' for '%s'", has_info ? "db" : "empty",
+ path, device->devpath);
+
+ return 0;
+
+fail:
+ (void) unlink(path);
+ (void) unlink(path_tmp);
+
+ return log_device_debug_errno(device, r, "sd-device: Failed to create %s file '%s' for '%s'", has_info ? "db" : "empty", path, device->devpath);
+}
+
+int device_delete_db(sd_device *device) {
+ const char *id;
+ char *path;
+ int r;
+
+ assert(device);
+
+ r = device_get_device_id(device, &id);
+ if (r < 0)
+ return r;
+
+ path = strjoina("/run/udev/data/", id);
+
+ if (unlink(path) < 0 && errno != ENOENT)
+ return -errno;
+
+ return 0;
+}
+
+static const char* const device_action_table[_SD_DEVICE_ACTION_MAX] = {
+ [SD_DEVICE_ADD] = "add",
+ [SD_DEVICE_REMOVE] = "remove",
+ [SD_DEVICE_CHANGE] = "change",
+ [SD_DEVICE_MOVE] = "move",
+ [SD_DEVICE_ONLINE] = "online",
+ [SD_DEVICE_OFFLINE] = "offline",
+ [SD_DEVICE_BIND] = "bind",
+ [SD_DEVICE_UNBIND] = "unbind",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(device_action, sd_device_action_t);
+
+void dump_device_action_table(void) {
+ DUMP_STRING_TABLE(device_action, sd_device_action_t, _SD_DEVICE_ACTION_MAX);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 13:07:49 +0000