Kent Overstreet
dc003efbc7
bcachefs: Add support for FS_IOC_GETFSSYSFSPATH
[TEST]:
```
$ cat ioctl_getsysfspath.c
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <unistd.h>
int main(int argc, char *argv[]) {
int fd;
struct fs_sysfs_path sysfs_path = {};
if (argc != 2) {
fprintf(stderr, "Usage: %s <path_to_file_or_directory>\n", argv[0]);
exit(EXIT_FAILURE);
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror("open");
exit(EXIT_FAILURE);
}
if (ioctl(fd, FS_IOC_GETFSSYSFSPATH, &sysfs_path) == -1) {
perror("ioctl FS_IOC_GETFSSYSFSPATH");
close(fd);
exit(EXIT_FAILURE);
}
printf("FS_IOC_GETFSSYSFSPATH: %s\n", sysfs_path.name);
close(fd);
return 0;
}
$ gcc ioctl_getsysfspath.c
$ sudo bcachefs format /dev/sda
$ sudo mount.bcachefs /dev/sda /mnt
$ sudo ./a.out /mnt
FS_IOC_GETFSSYSFSPATH: bcachefs/c380b4ab-fbb6-41d2-b805-7a89cae9cadb
```
Original patch link:
[1]: https://lore.kernel.org/all/20240207025624.1019754-8-kent.overstreet@linux.dev/
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Youling Tang <youling.tang@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2024-12-21 01:36:17 -05:00
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