[LTP] [PATCH 1/1] safe_macros: Fix bcachefs failure old kernel

[Petr Vorel]

> Hi!
> > I'm sorry, although man bcachefs(8) mentions fusemount, I haven't
> > figured out how to mount filesystem. Am I missing something?

> > Also, maybe for the start I would prefer to to test just kernel
> > functionality (no fuse).

> So this means that mount.bcasefs does exist, but the mount() fails? That
> sounds like something wasn't wired up properly.

Yes, mount.bcasefs exists, at least on openSUSE Tumbleweed (I suppose elsewhere
as well). Everything is done by single binary bcachefs.

ls -la /sbin/* |grep bcachefs
-rwxr-xr-x 1 root root     1424080 Jan  9 15:00 /sbin/bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/fsck.bcachefs -> bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/fsck.fuse.bcachefs -> bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/mkfs.bcachefs -> bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/mkfs.fuse.bcachefs -> bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/mount.bcachefs -> bcachefs
lrwxrwxrwx 1 root root           8 Jan  9 15:00 /sbin/mount.fuse.bcachefs -> bcachefs

> > Kind regards,
> > Petr

> >  lib/tst_supported_fs_types.c | 5 +++++
> >  1 file changed, 5 insertions(+)

> > diff --git a/lib/tst_supported_fs_types.c b/lib/tst_supported_fs_types.c
> > index 369836717..21765c370 100644
> > --- a/lib/tst_supported_fs_types.c
> > +++ b/lib/tst_supported_fs_types.c
> > @@ -96,6 +96,11 @@ static enum tst_fs_impl has_kernel_support(const char *fs_type)

> >  	SAFE_RMDIR(template);

> > +	if (!strcmp(fs_type, "bcachefs") && tst_kvercmp(6, 7, 0) < 0) {
> > +		tst_res(TINFO, "bcachefs skipped on kernel < 6.7");
> > +		return TST_FS_UNSUPPORTED;
> > +	}

> I would rather turn this into a FUSE specific blacklist without a kernel
> version, since bcachefs got into the kernel I do not think the fuse
> version would be useful for testhing at all, so what about:

Your code makes sense, I'll test it.

Kind regards,
Petr

> diff --git a/lib/tst_supported_fs_types.c b/lib/tst_supported_fs_types.c
> index 369836717..4110c826e 100644
> --- a/lib/tst_supported_fs_types.c
> +++ b/lib/tst_supported_fs_types.c
> @@ -33,6 +33,11 @@ static const char *const fs_type_whitelist[] = {
>         NULL
>  };

> +static const cahr *const fs_type_fuse_blacklist[] = {
> +       "bcachefs",
> +       NULL,
> +};
> +
>  static const char *fs_types[ARRAY_SIZE(fs_type_whitelist)];

>  static int has_mkfs(const char *fs_type)
> @@ -96,6 +101,11 @@ static enum tst_fs_impl has_kernel_support(const char *fs_type)

>         SAFE_RMDIR(template);

> +       if (tst_fs_in_skiplist(fs_type, tst_fs_type_fuse_blacklist)) {
> +               tst_res("Skipping %s because of FUSE blacklist", fs_type);
> +               return TST_FS_UNSUPPORTED;
> +       }
> +
>         /* Is FUSE supported by kernel? */
>         if (fuse_supported == -1) {
>                 ret = open("/dev/fuse", O_RDWR);


> >  	/* Is FUSE supported by kernel? */
> >  	if (fuse_supported == -1) {
> >  		ret = open("/dev/fuse", O_RDWR);