Re: [PATCH RFC 15/41] tracefs: use fc_init_pseudo()

[Alexander Mikhalitsyn <alex@xxxxxxxxxxxx>]

On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote:
> Initialize tracefs as a pseudo filesystem. This raises SB_I_PSEUDO
> and
> also SB_I_NOEXEC and SB_I_NODEV. tracefs never holds executables or
> device nodes.
> 
> SB_I_NOEXEC also refuses PROT_EXEC mappings. The only tracefs files
> that can be mapped are the ring buffers and __rb_map_vma() refuses
> VM_EXEC already.
> 
> Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>

Reviewed-by: Alexander Mikhalitsyn <alex@xxxxxxxxxxxx>

> ---
>  fs/tracefs/inode.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
> index 5020365ca704..e04febd868eb 100644
> --- a/fs/tracefs/inode.c
> +++ b/fs/tracefs/inode.c
> @@ -12,6 +12,7 @@
>  #include <linux/module.h>
>  #include <linux/fs.h>
>  #include <linux/fs_context.h>
> +#include <linux/pseudo_fs.h>
>  #include <linux/fs_parser.h>
>  #include <linux/kobject.h>
>  #include <linux/namei.h>
> @@ -510,6 +511,7 @@ static int tracefs_init_fs_context(struct
> fs_context *fc)
>       fsi->mode = TRACEFS_DEFAULT_MODE;
>  
>       fc->s_fs_info = fsi;
> +     fc_init_pseudo(fc);
>       fc->ops = &tracefs_context_ops;
>       return 0;
>  }