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-rw-r--r--udev/lib/Makefile.am3
-rw-r--r--udev/lib/exported_symbols10
-rw-r--r--udev/lib/libudev-private.h6
-rw-r--r--udev/lib/libudev-queue.c286
-rw-r--r--udev/lib/libudev.h14
-rw-r--r--udev/lib/test-libudev.c51
6 files changed, 365 insertions, 5 deletions
diff --git a/udev/lib/Makefile.am b/udev/lib/Makefile.am
index e800cf7f41..08e7ff865b 100644
--- a/udev/lib/Makefile.am
+++ b/udev/lib/Makefile.am
@@ -24,7 +24,8 @@ libudev_la_SOURCES =\
libudev-device.c \
libudev-enumerate.c \
libudev-ctrl.c \
- libudev-monitor.c
+ libudev-monitor.c \
+ libudev-queue.c
libudev_la_LDFLAGS = \
-version-info $(LIBUDEV_LT_CURRENT):$(LIBUDEV_LT_REVISION):$(LIBUDEV_LT_AGE) \
diff --git a/udev/lib/exported_symbols b/udev/lib/exported_symbols
index edd3c76f3d..81abb58d64 100644
--- a/udev/lib/exported_symbols
+++ b/udev/lib/exported_symbols
@@ -51,3 +51,13 @@ udev_monitor_unref
udev_monitor_get_udev
udev_monitor_get_fd
udev_monitor_receive_device
+udev_queue_new
+udev_queue_ref
+udev_queue_unref
+udev_queue_get_udev
+udev_queue_get_kernel_seqnum
+udev_queue_get_udev_seqnum
+udev_queue_get_queue_is_empty
+udev_queue_get_seqnum_is_finished
+udev_queue_get_queued_list_entry
+udev_queue_get_failed_list_entry
diff --git a/udev/lib/libudev-private.h b/udev/lib/libudev-private.h
index fd7f4551e7..7747b344fe 100644
--- a/udev/lib/libudev-private.h
+++ b/udev/lib/libudev-private.h
@@ -120,6 +120,12 @@ extern void list_entry_move_to_end(struct udev_list_entry *list_entry);
entry != NULL; \
entry = tmp, tmp = udev_list_entry_get_next(tmp))
+/* libudev-queue */
+extern int queue_export_udev_seqnum(struct udev_queue *udev_queue, unsigned long long int seqnum);
+extern int queue_export_device_queued(struct udev_queue *udev_queue, struct udev_device *udev_device);
+extern int queue_export_device_finished(struct udev_queue *udev_queue, struct udev_device *udev_device);
+extern int queue_export_device_failed(struct udev_queue *udev_queue, struct udev_device *udev_device);
+
/* libudev-utils */
#define UTIL_PATH_SIZE 1024
#define UTIL_LINE_SIZE 2048
diff --git a/udev/lib/libudev-queue.c b/udev/lib/libudev-queue.c
new file mode 100644
index 0000000000..3ca533b1e0
--- /dev/null
+++ b/udev/lib/libudev-queue.c
@@ -0,0 +1,286 @@
+/*
+ * libudev - interface to udev device information
+ *
+ * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include "libudev.h"
+#include "libudev-private.h"
+
+struct udev_queue {
+ struct udev *udev;
+ int refcount;
+ unsigned long long int last_seen_udev_seqnum;
+ struct list_node queue_list;
+ struct list_node failed_list;
+};
+
+struct udev_queue *udev_queue_new(struct udev *udev)
+{
+ struct udev_queue *udev_queue;
+
+ if (udev == NULL)
+ return NULL;
+
+ udev_queue = malloc(sizeof(struct udev_queue));
+ if (udev_queue == NULL)
+ return NULL;
+ memset(udev_queue, 0x00, sizeof(struct udev_queue));
+ udev_queue->refcount = 1;
+ udev_queue->udev = udev;
+ list_init(&udev_queue->queue_list);
+ list_init(&udev_queue->failed_list);
+ return udev_queue;
+}
+
+struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return NULL;
+ udev_queue->refcount++;
+ return udev_queue;
+}
+
+void udev_queue_unref(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return;
+ udev_queue->refcount--;
+ if (udev_queue->refcount > 0)
+ return;
+ list_cleanup(udev_queue->udev, &udev_queue->queue_list);
+ list_cleanup(udev_queue->udev, &udev_queue->failed_list);
+ free(udev_queue);
+}
+
+struct udev *udev_queue_get_udev(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return NULL;
+ return udev_queue->udev;
+}
+
+unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue)
+{
+ char filename[UTIL_PATH_SIZE];
+ unsigned long long int seqnum;
+ int fd;
+ char buf[32];
+ ssize_t len;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(filename, udev_get_sys_path(udev_queue->udev), sizeof(filename));
+ util_strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ len = read(fd, buf, sizeof(buf));
+ close(fd);
+ if (len <= 2)
+ return 0;
+ buf[len-1] = '\0';
+ seqnum = strtoull(buf, NULL, 10);
+ info(udev_queue->udev, "seqnum=%llu\n", seqnum);
+ return seqnum;
+}
+
+unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue)
+{
+ char filename[UTIL_PATH_SIZE];
+ unsigned long long int seqnum;
+ int fd;
+ char buf[32];
+ ssize_t len;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(filename, udev_get_dev_path(udev_queue->udev), sizeof(filename));
+ util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ len = read(fd, buf, sizeof(buf));
+ close(fd);
+ if (len <= 2)
+ return 0;
+ buf[len-1] = '\0';
+ seqnum = strtoull(buf, NULL, 10);
+ info(udev_queue->udev, "seqnum=%llu\n", seqnum);
+ udev_queue->last_seen_udev_seqnum = seqnum;
+ return seqnum;
+}
+
+int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue)
+{
+ char queuename[UTIL_PATH_SIZE];
+ struct stat statbuf;
+ unsigned long long int seqnum_kernel;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(queuename, udev_get_dev_path(udev_queue->udev), sizeof(queuename));
+ util_strlcat(queuename, "/.udev/queue", sizeof(queuename));
+ if (stat(queuename, &statbuf) == 0) {
+ info(udev_queue->udev, "queue is not empty\n");
+ return 0;
+ }
+ seqnum_kernel = udev_queue_get_kernel_seqnum(udev_queue);
+ if (seqnum_kernel <= udev_queue->last_seen_udev_seqnum) {
+ info(udev_queue->udev, "queue is empty\n");
+ return 1;
+ }
+ udev_queue_get_udev_seqnum(udev_queue);
+ if (seqnum_kernel <= udev_queue->last_seen_udev_seqnum) {
+ info(udev_queue->udev, "queue is empty\n");
+ return 1;
+ }
+ info(udev_queue->udev, "queue is empty, but kernel events still pending [%llu]<->[%llu]\n",
+ seqnum_kernel, udev_queue->last_seen_udev_seqnum);
+ return 0;
+}
+
+int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum)
+{
+ char filename[UTIL_PATH_SIZE];
+ struct stat statbuf;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ /* if we have not seen this seqnum, check if it is/was already queued */
+ if (seqnum < udev_queue->last_seen_udev_seqnum) {
+ udev_queue_get_udev_seqnum(udev_queue);
+ if (seqnum < udev_queue->last_seen_udev_seqnum)
+ return 0;
+ }
+ snprintf(filename, sizeof(filename), "%s/.udev/queue/%llu",
+ udev_get_dev_path(udev_queue->udev), seqnum);
+ if (stat(filename, &statbuf) == 0)
+ return 0;
+ info(udev_queue->udev, "seqnum: %llu finished\n", seqnum);
+ return 1;
+}
+
+struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue)
+{
+ char path[UTIL_PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ if (udev_queue == NULL)
+ return NULL;
+ list_cleanup(udev_queue->udev, &udev_queue->queue_list);
+ util_strlcpy(path, udev_get_dev_path(udev_queue->udev), sizeof(path));
+ util_strlcat(path, "/.udev/queue", sizeof(path));
+ dir = opendir(path);
+ if (dir == NULL)
+ return NULL;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ char filename[UTIL_PATH_SIZE];
+ char syspath[UTIL_PATH_SIZE];
+ size_t syslen;
+ ssize_t len;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ util_strlcpy(filename, path, sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, dent->d_name, sizeof(filename));
+
+ syslen = util_strlcpy(syspath, udev_get_sys_path(udev_queue->udev), sizeof(syspath));
+ len = readlink(filename, &syspath[syslen], sizeof(syspath)-syslen);
+ if (len < 0 || len >= (ssize_t)(sizeof(syspath)-syslen))
+ continue;
+ syspath[syslen + len] = '\0';
+ info(udev_queue->udev, "found '%s' [%s]\n", syspath, dent->d_name);
+ list_entry_add(udev_queue->udev, &udev_queue->queue_list, syspath, dent->d_name, 0, 0);
+ }
+ closedir(dir);
+ return list_get_entry(&udev_queue->queue_list);
+}
+
+struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue)
+{
+ char path[UTIL_PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ if (udev_queue == NULL)
+ return NULL;
+ list_cleanup(udev_queue->udev, &udev_queue->failed_list);
+ util_strlcpy(path, udev_get_dev_path(udev_queue->udev), sizeof(path));
+ util_strlcat(path, "/.udev/failed", sizeof(path));
+ dir = opendir(path);
+ if (dir == NULL)
+ return NULL;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ char filename[UTIL_PATH_SIZE];
+ char syspath[UTIL_PATH_SIZE];
+ struct stat statbuf;
+ size_t syslen;
+ ssize_t len;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ util_strlcpy(filename, path, sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, dent->d_name, sizeof(filename));
+
+ syslen = util_strlcpy(syspath, udev_get_sys_path(udev_queue->udev), sizeof(syspath));
+ len = readlink(filename, &syspath[syslen], sizeof(syspath)-syslen);
+ if (len < 0 || len >= (ssize_t)(sizeof(syspath)-syslen))
+ continue;
+ syspath[syslen + len] = '\0';
+ info(udev_queue->udev, "found '%s' [%s]\n", syspath, dent->d_name);
+ util_strlcpy(filename, syspath, sizeof(filename));
+ util_strlcat(filename, "/uevent", sizeof(filename));
+ if (stat(filename, &statbuf) != 0)
+ continue;
+ list_entry_add(udev_queue->udev, &udev_queue->failed_list, syspath, NULL, 0, 0);
+ }
+ closedir(dir);
+ return list_get_entry(&udev_queue->failed_list);
+}
+
+int queue_export_udev_seqnum(struct udev_queue *udev_queue, unsigned long long int seqnum)
+{
+ return 0;
+}
+
+extern int queue_export_device_queued(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
+
+extern int queue_export_device_finished(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
+
+extern int queue_export_device_failed(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
diff --git a/udev/lib/libudev.h b/udev/lib/libudev.h
index 49d24f1476..cc6939c02f 100644
--- a/udev/lib/libudev.h
+++ b/udev/lib/libudev.h
@@ -96,8 +96,8 @@ extern struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev
struct udev_enumerate;
extern struct udev_enumerate *udev_enumerate_new(struct udev *udev);
extern struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate);
-extern struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate);
extern void udev_enumerate_unref(struct udev_enumerate *udev_enumerate);
+extern struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate);
extern int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
extern int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
extern int udev_enumerate_add_match_attr(struct udev_enumerate *udev_enumerate, const char *attr, const char *value);
@@ -107,4 +107,16 @@ extern int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate);
extern int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate);
extern struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate);
+/* event queue */
+struct udev_queue;
+extern struct udev_queue *udev_queue_new(struct udev *udev);
+extern struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue);
+extern void udev_queue_unref(struct udev_queue *udev_queue);
+extern struct udev *udev_queue_get_udev(struct udev_queue *udev_queue);
+extern unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue);
+extern unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue);
+extern int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue);
+extern int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum);
+extern struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue);
+extern struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue);
#endif
diff --git a/udev/lib/test-libudev.c b/udev/lib/test-libudev.c
index 5e9897c715..9c7acb048a 100644
--- a/udev/lib/test-libudev.c
+++ b/udev/lib/test-libudev.c
@@ -19,6 +19,7 @@
#include <stdio.h>
#include <stdarg.h>
+#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
@@ -168,10 +169,9 @@ static int test_enumerate_print_list(struct udev_enumerate *enumerate)
device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
udev_list_entry_get_name(list_entry));
if (device != NULL) {
- printf("device: '%s' (%s) '%s'\n",
+ printf("device: '%s' (%s)\n",
udev_device_get_syspath(device),
- udev_device_get_subsystem(device),
- udev_device_get_sysname(device));
+ udev_device_get_subsystem(device));
udev_device_unref(device);
count++;
}
@@ -230,6 +230,49 @@ static int test_monitor(struct udev *udev, const char *socket_path)
return 0;
}
+static int test_queue(struct udev *udev)
+{
+ struct udev_queue *udev_queue;
+ unsigned long long int seqnum;
+ struct udev_list_entry *list_entry;
+
+ udev_queue = udev_queue_new(udev);
+ if (udev_queue == NULL)
+ return -1;
+ seqnum = udev_queue_get_kernel_seqnum(udev_queue);
+ printf("seqnum kernel: %llu\n", seqnum);
+ seqnum = udev_queue_get_udev_seqnum(udev_queue);
+ printf("seqnum udev : %llu\n", seqnum);
+
+ if (udev_queue_get_queue_is_empty(udev_queue))
+ printf("queue is empty\n");
+ printf("get queue list\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
+ printf("\n");
+ printf("get queue list again\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
+ printf("\n");
+ printf("get failed list\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
+ printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
+ printf("\n");
+
+ list_entry = udev_queue_get_queued_list_entry(udev_queue);
+ if (list_entry != NULL) {
+ printf("event [%llu] is queued\n", seqnum);
+ seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
+ if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
+ printf("event [%llu] is not finished\n", seqnum);
+ else
+ printf("event [%llu] is finished\n", seqnum);
+ }
+ printf("\n");
+ udev_queue_unref(udev_queue);
+ return 0;
+}
+
int main(int argc, char *argv[], char *envp[])
{
struct udev *udev = NULL;
@@ -351,6 +394,8 @@ int main(int argc, char *argv[], char *envp[])
test_enumerate_print_list(udev_enumerate);
udev_enumerate_unref(udev_enumerate);
+ test_queue(udev);
+
test_monitor(udev, socket);
out:
udev_unref(udev);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-10-25 11:35:42 +0000