On Fri, Apr 24, 2015 at 01:04:27PM +0200, Andreas Gruenbacher wrote:
> Create a richacl that corresponds to given file mode permission bits.
>
> Signed-off-by: Andreas Gruenbacher <agruen@xxxxxxxxxx>
> ---
> fs/richacl_compat.c | 38 ++++++++++++++++++++++++++++++++++++++
> include/linux/richacl.h | 1 +
> 2 files changed, 39 insertions(+)
>
> diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
> index 49af600..8ebe772 100644
> --- a/fs/richacl_compat.c
> +++ b/fs/richacl_compat.c
> @@ -750,3 +750,41 @@ richacl_apply_masks(struct richacl **acl)
> return 0;
> }
> EXPORT_SYMBOL_GPL(richacl_apply_masks);
> +
> +/**
> + * richacl_from_mode_unmasked - create an acl which corresponds to @mode
> + *
> + * The resulting acl doesn't have the RICHACL_MASKED flag set.
That seems to disagree with:
> + *
> + * @mode: file mode including the file type
> + */
> +struct richacl *
> +richacl_from_mode_unmasked(mode_t mode)
> +{
> + struct richacl *acl;
> + struct richace *ace;
> +
> + acl = richacl_alloc(1, GFP_KERNEL);
> + if (!acl)
> + return NULL;
> + acl->a_flags = RICHACL_MASKED;
this line?
--b.
> + acl->a_owner_mask = richacl_mode_to_mask(mode >> 6) |
> + RICHACE_POSIX_OWNER_ALLOWED;
> + acl->a_group_mask = richacl_mode_to_mask(mode >> 3);
> + acl->a_other_mask = richacl_mode_to_mask(mode);
> +
> + ace = acl->a_entries;
> + ace->e_type = RICHACE_ACCESS_ALLOWED_ACE_TYPE;
> + ace->e_flags = RICHACE_SPECIAL_WHO;
> + ace->e_mask = RICHACE_POSIX_ALWAYS_ALLOWED |
> + RICHACE_POSIX_MODE_ALL |
> + RICHACE_POSIX_OWNER_ALLOWED;
> + /* RICHACE_DELETE_CHILD is meaningless for non-directories. */
> + if (!S_ISDIR(mode))
> + ace->e_mask &= ~RICHACE_DELETE_CHILD;
> + ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID;
> +
> + return acl;
> +
> +}
> +EXPORT_SYMBOL_GPL(richacl_from_mode_unmasked);
> diff --git a/include/linux/richacl.h b/include/linux/richacl.h
> index 6a97dca..25ff4df 100644
> --- a/include/linux/richacl.h
> +++ b/include/linux/richacl.h
> @@ -327,5 +327,6 @@ extern struct richacl *richacl_create(struct inode *, struct inode *);
>
> /* richacl_compat.c */
> extern int richacl_apply_masks(struct richacl **);
> +extern struct richacl *richacl_from_mode_unmasked(mode_t);
>
> #endif /* __RICHACL_H */
> --
> 2.1.0
>
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