* Opaque object representing the current event queue in the udev daemon.
*/
struct udev_queue {
- struct udev *udev;
- int refcount;
- struct udev_list queue_list;
+ struct udev *udev;
+ int refcount;
+ struct udev_list queue_list;
};
/**
**/
UDEV_EXPORT struct udev_queue *udev_queue_new(struct udev *udev)
{
- struct udev_queue *udev_queue;
-
- if (udev == NULL)
- return NULL;
-
- udev_queue = calloc(1, sizeof(struct udev_queue));
- if (udev_queue == NULL)
- return NULL;
- udev_queue->refcount = 1;
- udev_queue->udev = udev;
- udev_list_init(udev, &udev_queue->queue_list, false);
- return udev_queue;
+ struct udev_queue *udev_queue;
+
+ if (udev == NULL)
+ return NULL;
+
+ udev_queue = calloc(1, sizeof(struct udev_queue));
+ if (udev_queue == NULL)
+ return NULL;
+ udev_queue->refcount = 1;
+ udev_queue->udev = udev;
+ udev_list_init(udev, &udev_queue->queue_list, false);
+ return udev_queue;
}
/**
**/
UDEV_EXPORT struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue)
{
- if (udev_queue == NULL)
- return NULL;
- udev_queue->refcount++;
- return udev_queue;
+ if (udev_queue == NULL)
+ return NULL;
+ udev_queue->refcount++;
+ return udev_queue;
}
/**
**/
UDEV_EXPORT void udev_queue_unref(struct udev_queue *udev_queue)
{
- if (udev_queue == NULL)
- return;
- udev_queue->refcount--;
- if (udev_queue->refcount > 0)
- return;
- udev_list_cleanup(&udev_queue->queue_list);
- free(udev_queue);
+ if (udev_queue == NULL)
+ return;
+ udev_queue->refcount--;
+ if (udev_queue->refcount > 0)
+ return;
+ udev_list_cleanup(&udev_queue->queue_list);
+ free(udev_queue);
}
/**
**/
UDEV_EXPORT struct udev *udev_queue_get_udev(struct udev_queue *udev_queue)
{
- if (udev_queue == NULL)
- return NULL;
- return udev_queue->udev;
+ if (udev_queue == NULL)
+ return NULL;
+ return udev_queue->udev;
}
unsigned long long int udev_get_kernel_seqnum(struct udev *udev)
{
- char filename[UTIL_PATH_SIZE];
- unsigned long long int seqnum;
- int fd;
- char buf[32];
- ssize_t len;
-
- util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), "/kernel/uevent_seqnum", NULL);
- fd = open(filename, O_RDONLY|O_CLOEXEC);
- 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);
- return seqnum;
+ char filename[UTIL_PATH_SIZE];
+ unsigned long long int seqnum;
+ int fd;
+ char buf[32];
+ ssize_t len;
+
+ util_strscpyl(filename, sizeof(filename), udev_get_sys_path(udev), "/kernel/uevent_seqnum", NULL);
+ fd = open(filename, O_RDONLY|O_CLOEXEC);
+ 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);
+ return seqnum;
}
/**
**/
UDEV_EXPORT unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue)
{
- unsigned long long int seqnum;
+ unsigned long long int seqnum;
- if (udev_queue == NULL)
- return -EINVAL;
+ if (udev_queue == NULL)
+ return -EINVAL;
- seqnum = udev_get_kernel_seqnum(udev_queue->udev);
- dbg(udev_queue->udev, "seqnum=%llu\n", seqnum);
- return seqnum;
+ seqnum = udev_get_kernel_seqnum(udev_queue->udev);
+ dbg(udev_queue->udev, "seqnum=%llu\n", seqnum);
+ return seqnum;
}
int udev_queue_read_seqnum(FILE *queue_file, unsigned long long int *seqnum)
{
- if (fread(seqnum, sizeof(unsigned long long int), 1, queue_file) != 1)
- return -1;
+ if (fread(seqnum, sizeof(unsigned long long int), 1, queue_file) != 1)
+ return -1;
- return 0;
+ return 0;
}
ssize_t udev_queue_skip_devpath(FILE *queue_file)
{
- unsigned short int len;
+ unsigned short int len;
- if (fread(&len, sizeof(unsigned short int), 1, queue_file) == 1) {
- char devpath[len];
+ if (fread(&len, sizeof(unsigned short int), 1, queue_file) == 1) {
+ char devpath[len];
- /* use fread to skip, fseek might drop buffered data */
- if (fread(devpath, 1, len, queue_file) == len)
- return len;
- }
+ /* use fread to skip, fseek might drop buffered data */
+ if (fread(devpath, 1, len, queue_file) == len)
+ return len;
+ }
- return -1;
+ return -1;
}
ssize_t udev_queue_read_devpath(FILE *queue_file, char *devpath, size_t size)
{
- unsigned short int read_bytes = 0;
- unsigned short int len;
+ unsigned short int read_bytes = 0;
+ unsigned short int len;
- if (fread(&len, sizeof(unsigned short int), 1, queue_file) != 1)
- return -1;
+ if (fread(&len, sizeof(unsigned short int), 1, queue_file) != 1)
+ return -1;
- read_bytes = (len < size - 1) ? len : size - 1;
- if (fread(devpath, 1, read_bytes, queue_file) != read_bytes)
- return -1;
- devpath[read_bytes] = '\0';
+ read_bytes = (len < size - 1) ? len : size - 1;
+ if (fread(devpath, 1, read_bytes, queue_file) != read_bytes)
+ return -1;
+ devpath[read_bytes] = '\0';
- /* if devpath was too long, skip unread characters */
- if (read_bytes != len) {
- unsigned short int skip_bytes = len - read_bytes;
- char buf[skip_bytes];
+ /* if devpath was too long, skip unread characters */
+ if (read_bytes != len) {
+ unsigned short int skip_bytes = len - read_bytes;
+ char buf[skip_bytes];
- if (fread(buf, 1, skip_bytes, queue_file) != skip_bytes)
- return -1;
- }
+ if (fread(buf, 1, skip_bytes, queue_file) != skip_bytes)
+ return -1;
+ }
- return read_bytes;
+ return read_bytes;
}
static FILE *open_queue_file(struct udev_queue *udev_queue, unsigned long long int *seqnum_start)
{
- char filename[UTIL_PATH_SIZE];
- FILE *queue_file;
+ char filename[UTIL_PATH_SIZE];
+ FILE *queue_file;
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_queue->udev), "/queue.bin", NULL);
- queue_file = fopen(filename, "re");
- if (queue_file == NULL)
- return NULL;
+ util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_queue->udev), "/queue.bin", NULL);
+ queue_file = fopen(filename, "re");
+ if (queue_file == NULL)
+ return NULL;
- if (udev_queue_read_seqnum(queue_file, seqnum_start) < 0) {
- err(udev_queue->udev, "corrupt queue file\n");
- fclose(queue_file);
- return NULL;
- }
+ if (udev_queue_read_seqnum(queue_file, seqnum_start) < 0) {
+ err(udev_queue->udev, "corrupt queue file\n");
+ fclose(queue_file);
+ return NULL;
+ }
- return queue_file;
+ return queue_file;
}
/**
**/
UDEV_EXPORT unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue)
{
- unsigned long long int seqnum_udev;
- FILE *queue_file;
-
- queue_file = open_queue_file(udev_queue, &seqnum_udev);
- if (queue_file == NULL)
- return 0;
-
- for (;;) {
- unsigned long long int seqnum;
- ssize_t devpath_len;
-
- if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
- break;
- devpath_len = udev_queue_skip_devpath(queue_file);
- if (devpath_len < 0)
- break;
- if (devpath_len > 0)
- seqnum_udev = seqnum;
- }
-
- fclose(queue_file);
- return seqnum_udev;
+ unsigned long long int seqnum_udev;
+ FILE *queue_file;
+
+ queue_file = open_queue_file(udev_queue, &seqnum_udev);
+ if (queue_file == NULL)
+ return 0;
+
+ for (;;) {
+ unsigned long long int seqnum;
+ ssize_t devpath_len;
+
+ if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
+ break;
+ devpath_len = udev_queue_skip_devpath(queue_file);
+ if (devpath_len < 0)
+ break;
+ if (devpath_len > 0)
+ seqnum_udev = seqnum;
+ }
+
+ fclose(queue_file);
+ return seqnum_udev;
}
/**
**/
UDEV_EXPORT int udev_queue_get_udev_is_active(struct udev_queue *udev_queue)
{
- unsigned long long int seqnum_start;
- FILE *queue_file;
+ unsigned long long int seqnum_start;
+ FILE *queue_file;
- queue_file = open_queue_file(udev_queue, &seqnum_start);
- if (queue_file == NULL)
- return 0;
+ queue_file = open_queue_file(udev_queue, &seqnum_start);
+ if (queue_file == NULL)
+ return 0;
- fclose(queue_file);
- return 1;
+ fclose(queue_file);
+ return 1;
}
/**
**/
UDEV_EXPORT int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue)
{
- unsigned long long int seqnum_kernel;
- unsigned long long int seqnum_udev = 0;
- int queued = 0;
- int is_empty = 0;
- FILE *queue_file;
-
- if (udev_queue == NULL)
- return -EINVAL;
- queue_file = open_queue_file(udev_queue, &seqnum_udev);
- if (queue_file == NULL)
- return 1;
-
- for (;;) {
- unsigned long long int seqnum;
- ssize_t devpath_len;
-
- if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
- break;
- devpath_len = udev_queue_skip_devpath(queue_file);
- if (devpath_len < 0)
- break;
-
- if (devpath_len > 0) {
- queued++;
- seqnum_udev = seqnum;
- } else {
- queued--;
- }
- }
-
- if (queued > 0) {
- dbg(udev_queue->udev, "queue is not empty\n");
- goto out;
- }
-
- seqnum_kernel = udev_queue_get_kernel_seqnum(udev_queue);
- if (seqnum_udev < seqnum_kernel) {
- dbg(udev_queue->udev, "queue is empty but kernel events still pending [%llu]<->[%llu]\n",
- seqnum_kernel, seqnum_udev);
- goto out;
- }
-
- dbg(udev_queue->udev, "queue is empty\n");
- is_empty = 1;
+ unsigned long long int seqnum_kernel;
+ unsigned long long int seqnum_udev = 0;
+ int queued = 0;
+ int is_empty = 0;
+ FILE *queue_file;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ queue_file = open_queue_file(udev_queue, &seqnum_udev);
+ if (queue_file == NULL)
+ return 1;
+
+ for (;;) {
+ unsigned long long int seqnum;
+ ssize_t devpath_len;
+
+ if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
+ break;
+ devpath_len = udev_queue_skip_devpath(queue_file);
+ if (devpath_len < 0)
+ break;
+
+ if (devpath_len > 0) {
+ queued++;
+ seqnum_udev = seqnum;
+ } else {
+ queued--;
+ }
+ }
+
+ if (queued > 0) {
+ dbg(udev_queue->udev, "queue is not empty\n");
+ goto out;
+ }
+
+ seqnum_kernel = udev_queue_get_kernel_seqnum(udev_queue);
+ if (seqnum_udev < seqnum_kernel) {
+ dbg(udev_queue->udev, "queue is empty but kernel events still pending [%llu]<->[%llu]\n",
+ seqnum_kernel, seqnum_udev);
+ goto out;
+ }
+
+ dbg(udev_queue->udev, "queue is empty\n");
+ is_empty = 1;
out:
- fclose(queue_file);
- return is_empty;
+ fclose(queue_file);
+ return is_empty;
}
/**
* Returns: a flag indicating if any of the sequence numbers in the given range is currently active.
**/
UDEV_EXPORT int udev_queue_get_seqnum_sequence_is_finished(struct udev_queue *udev_queue,
- unsigned long long int start, unsigned long long int end)
+ unsigned long long int start, unsigned long long int end)
{
- unsigned long long int seqnum;
- ssize_t devpath_len;
- int unfinished;
- FILE *queue_file;
-
- if (udev_queue == NULL)
- return -EINVAL;
- queue_file = open_queue_file(udev_queue, &seqnum);
- if (queue_file == NULL)
- return 1;
- if (start < seqnum)
- start = seqnum;
- if (start > end) {
- fclose(queue_file);
- return 1;
- }
- if (end - start > INT_MAX - 1) {
- fclose(queue_file);
- return -EOVERFLOW;
- }
-
- /*
- * we might start with 0, and handle the initial seqnum
- * only when we find an entry in the queue file
- **/
- unfinished = end - start;
-
- do {
- if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
- break;
- devpath_len = udev_queue_skip_devpath(queue_file);
- if (devpath_len < 0)
- break;
-
- /*
- * we might start with an empty or re-build queue file, where
- * the initial seqnum is not recorded as finished
- */
- if (start == seqnum && devpath_len > 0)
- unfinished++;
-
- if (devpath_len == 0) {
- if (seqnum >= start && seqnum <= end)
- unfinished--;
- }
- } while (unfinished > 0);
-
- fclose(queue_file);
-
- return (unfinished == 0);
+ unsigned long long int seqnum;
+ ssize_t devpath_len;
+ int unfinished;
+ FILE *queue_file;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ queue_file = open_queue_file(udev_queue, &seqnum);
+ if (queue_file == NULL)
+ return 1;
+ if (start < seqnum)
+ start = seqnum;
+ if (start > end) {
+ fclose(queue_file);
+ return 1;
+ }
+ if (end - start > INT_MAX - 1) {
+ fclose(queue_file);
+ return -EOVERFLOW;
+ }
+
+ /*
+ * we might start with 0, and handle the initial seqnum
+ * only when we find an entry in the queue file
+ **/
+ unfinished = end - start;
+
+ do {
+ if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
+ break;
+ devpath_len = udev_queue_skip_devpath(queue_file);
+ if (devpath_len < 0)
+ break;
+
+ /*
+ * we might start with an empty or re-build queue file, where
+ * the initial seqnum is not recorded as finished
+ */
+ if (start == seqnum && devpath_len > 0)
+ unfinished++;
+
+ if (devpath_len == 0) {
+ if (seqnum >= start && seqnum <= end)
+ unfinished--;
+ }
+ } while (unfinished > 0);
+
+ fclose(queue_file);
+
+ return (unfinished == 0);
}
/**
**/
UDEV_EXPORT int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum)
{
- if (!udev_queue_get_seqnum_sequence_is_finished(udev_queue, seqnum, seqnum))
- return 0;
+ if (!udev_queue_get_seqnum_sequence_is_finished(udev_queue, seqnum, seqnum))
+ return 0;
- dbg(udev_queue->udev, "seqnum: %llu finished\n", seqnum);
- return 1;
+ dbg(udev_queue->udev, "seqnum: %llu finished\n", seqnum);
+ return 1;
}
/**
**/
UDEV_EXPORT struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue)
{
- unsigned long long int seqnum;
- FILE *queue_file;
-
- if (udev_queue == NULL)
- return NULL;
- udev_list_cleanup(&udev_queue->queue_list);
-
- queue_file = open_queue_file(udev_queue, &seqnum);
- if (queue_file == NULL)
- return NULL;
-
- for (;;) {
- char syspath[UTIL_PATH_SIZE];
- char *s;
- size_t l;
- ssize_t len;
- char seqnum_str[32];
- struct udev_list_entry *list_entry;
-
- if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
- break;
- snprintf(seqnum_str, sizeof(seqnum_str), "%llu", seqnum);
-
- s = syspath;
- l = util_strpcpyl(&s, sizeof(syspath), udev_get_sys_path(udev_queue->udev), NULL);
- len = udev_queue_read_devpath(queue_file, s, l);
- if (len < 0)
- break;
-
- if (len > 0) {
- udev_list_entry_add(&udev_queue->queue_list, syspath, seqnum_str);
- } else {
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_queue->queue_list)) {
- if (strcmp(seqnum_str, udev_list_entry_get_value(list_entry)) == 0) {
- udev_list_entry_delete(list_entry);
- break;
- }
- }
- }
- }
- fclose(queue_file);
-
- return udev_list_get_entry(&udev_queue->queue_list);
+ unsigned long long int seqnum;
+ FILE *queue_file;
+
+ if (udev_queue == NULL)
+ return NULL;
+ udev_list_cleanup(&udev_queue->queue_list);
+
+ queue_file = open_queue_file(udev_queue, &seqnum);
+ if (queue_file == NULL)
+ return NULL;
+
+ for (;;) {
+ char syspath[UTIL_PATH_SIZE];
+ char *s;
+ size_t l;
+ ssize_t len;
+ char seqnum_str[32];
+ struct udev_list_entry *list_entry;
+
+ if (udev_queue_read_seqnum(queue_file, &seqnum) < 0)
+ break;
+ snprintf(seqnum_str, sizeof(seqnum_str), "%llu", seqnum);
+
+ s = syspath;
+ l = util_strpcpyl(&s, sizeof(syspath), udev_get_sys_path(udev_queue->udev), NULL);
+ len = udev_queue_read_devpath(queue_file, s, l);
+ if (len < 0)
+ break;
+
+ if (len > 0) {
+ udev_list_entry_add(&udev_queue->queue_list, syspath, seqnum_str);
+ } else {
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_queue->queue_list)) {
+ if (strcmp(seqnum_str, udev_list_entry_get_value(list_entry)) == 0) {
+ udev_list_entry_delete(list_entry);
+ break;
+ }
+ }
+ }
+ }
+ fclose(queue_file);
+
+ return udev_list_get_entry(&udev_queue->queue_list);
}
struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue);
UDEV_EXPORT struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue)
{
- errno = ENOSYS;
- return NULL;
+ errno = ENOSYS;
+ return NULL;
}
~ianmdlvl / elogind.git / blobdiff