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Linux kernel source tree
dc003efbc7
[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>
|
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.