On Mon 23-06-25 11:01:26, Christian Brauner wrote:
> Allow to return the root of the global pidfs filesystem.
>
> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/internal.h | 1 +
> fs/pidfs.c | 11 +++++++++++
> 2 files changed, 12 insertions(+)
>
> diff --git a/fs/internal.h b/fs/internal.h
> index 22ba066d1dba..ad256bccdc85 100644
> --- a/fs/internal.h
> +++ b/fs/internal.h
> @@ -353,3 +353,4 @@ int anon_inode_getattr(struct mnt_idmap *idmap, const struct path *path,
> unsigned int query_flags);
> int anon_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
> struct iattr *attr);
> +void pidfs_get_root(struct path *path);
> diff --git a/fs/pidfs.c b/fs/pidfs.c
> index 1cf66fd9961e..1b7bd14366dc 100644
> --- a/fs/pidfs.c
> +++ b/fs/pidfs.c
> @@ -31,6 +31,14 @@
> static struct kmem_cache *pidfs_attr_cachep __ro_after_init;
> static struct kmem_cache *pidfs_xattr_cachep __ro_after_init;
>
> +static struct path pidfs_root_path = {};
> +
> +void pidfs_get_root(struct path *path)
> +{
> + *path = pidfs_root_path;
> + path_get(path);
> +}
> +
> /*
> * Stashes information that userspace needs to access even after the
> * process has been reaped.
> @@ -1065,4 +1073,7 @@ void __init pidfs_init(void)
> pidfs_mnt = kern_mount(&pidfs_type);
> if (IS_ERR(pidfs_mnt))
> panic("Failed to mount pidfs pseudo filesystem");
> +
> + pidfs_root_path.mnt = pidfs_mnt;
> + pidfs_root_path.dentry = pidfs_mnt->mnt_root;
> }
>
> --
> 2.47.2
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
