Quoting Kees Cook (keesc...@chromium.org):
> Providing human-readable (and audit-parsable) strings for the READING_*
> enums is needed by some LSMs.
>
> Signed-off-by: Kees Cook <keesc...@chromium.org>
Acked-by: Serge Hallyn <serge.hal...@canonical.com>
> ---
> fs/exec.c | 19 +++++++++++++++++++
> include/linux/fs.h | 1 +
> 2 files changed, 20 insertions(+)
>
> diff --git a/fs/exec.c b/fs/exec.c
> index c4010b8207a1..05e71b6c0ef0 100644
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -819,6 +819,25 @@ struct file *open_exec(const char *name)
> }
> EXPORT_SYMBOL(open_exec);
>
> +const char *kernel_read_file_id_str(enum kernel_read_file_id id)
> +{
> + switch (id) {
> + case READING_FIRMWARE:
> + return "firmware";
> + case READING_MODULE:
> + return "kernel-module";
> + case READING_KEXEC_IMAGE:
> + return "kexec-image";
> + case READING_KEXEC_INITRAMFS:
> + return "kexec-initramfs";
> + case READING_POLICY:
> + return "security-policy";
> + default:
> + return "unknown";
> + }
> +}
> +EXPORT_SYMBOL(kernel_read_file_id_str);
> +
> int kernel_read(struct file *file, loff_t offset,
> char *addr, unsigned long count)
> {
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 304991a80e23..596b403d5a28 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2589,6 +2589,7 @@ enum kernel_read_file_id {
> READING_MAX_ID
> };
>
> +extern const char *kernel_read_file_id_str(enum kernel_read_file_id id);
> extern int kernel_read(struct file *, loff_t, char *, unsigned long);
> extern int kernel_read_file(struct file *, void **, loff_t *, loff_t,
> enum kernel_read_file_id);
> --
> 2.6.3
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