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    Subject[PATCH v8 24/41] richacl: Set the other permissions to the other mask
    Date
    Change the acl so that everyone@ is granted the permissions set in the
    other mask.

    Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
    Reviewed-by: J. Bruce Fields <bfields@redhat.com>
    ---
    fs/richacl_compat.c | 41 +++++++++++++++++++++++++++++++++++++++++
    1 file changed, 41 insertions(+)

    diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
    index 16deeb4..21ee31e 100644
    --- a/fs/richacl_compat.c
    +++ b/fs/richacl_compat.c
    @@ -462,3 +462,44 @@ richacl_set_owner_permissions(struct richacl_alloc *alloc)
    }
    return 0;
    }
    +
    +/**
    + * richacl_set_other_permissions - set the other permissions to the other mask
    + * @alloc: acl and number of allocated entries
    + * @added: permissions added for everyone@
    + *
    + * Change the acl so that everyone@ is granted the permissions set in the other
    + * mask. This leaves at most one efective everyone@ allow entry at the end of
    + * the acl. If everyone@ end up being granted additional permissions, these
    + * permissions are returned in @added.
    + */
    +static int
    +richacl_set_other_permissions(struct richacl_alloc *alloc, unsigned int *added)
    +{
    + struct richacl *acl = alloc->acl;
    + unsigned int x = RICHACE_POSIX_ALWAYS_ALLOWED;
    + unsigned int other_mask = acl->a_other_mask & ~x;
    + struct richace *ace;
    +
    + if (!(other_mask &&
    + (acl->a_flags & RICHACL_WRITE_THROUGH)))
    + return 0;
    +
    + *added = other_mask;
    + ace = acl->a_entries + acl->a_count - 1;
    + if (acl->a_count == 0 ||
    + !richace_is_everyone(ace) ||
    + richace_is_inherit_only(ace)) {
    + ace++;
    + if (richacl_insert_entry(alloc, &ace))
    + return -1;
    + ace->e_type = RICHACE_ACCESS_ALLOWED_ACE_TYPE;
    + ace->e_flags = RICHACE_SPECIAL_WHO;
    + ace->e_mask = other_mask;
    + ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID;
    + } else {
    + *added &= ~ace->e_mask;
    + richace_change_mask(alloc, &ace, other_mask);
    + }
    + return 0;
    +}
    --
    2.4.3


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