[PATCH v4 03/16] fs-verity: add UAPI header
From: Eric Biggers <ebiggers@kernel.org>
Date: 2019-06-06 15:54:39
Also in:
linux-ext4, linux-f2fs-devel, linux-fscrypt, linux-fsdevel, linux-integrity
Subsystem:
documentation, fsverity: read-only file-based authenticity protection, the rest · Maintainers:
Jonathan Corbet, Eric Biggers, Theodore Y. Ts'o, Linus Torvalds
From: Eric Biggers <redacted> Add the UAPI header for fs-verity, including two ioctls: - FS_IOC_ENABLE_VERITY - FS_IOC_MEASURE_VERITY These ioctls are documented in the "User API" section of Documentation/filesystems/fsverity.rst. Examples of using these ioctls can be found in fsverity-utils (https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/fsverity-utils.git). I've also written xfstests that test these ioctls (https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/xfstests-dev.git/log/?h=fsverity). Signed-off-by: Eric Biggers <redacted> --- Documentation/ioctl/ioctl-number.txt | 1 + include/uapi/linux/fsverity.h | 39 ++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) create mode 100644 include/uapi/linux/fsverity.h
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index c9558146ac58..21767c81e86d 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt@@ -225,6 +225,7 @@ Code Seq#(hex) Include File Comments 'f' 00-0F fs/ext4/ext4.h conflict! 'f' 00-0F linux/fs.h conflict! 'f' 00-0F fs/ocfs2/ocfs2_fs.h conflict! +'f' 81-8F linux/fsverity.h 'g' 00-0F linux/usb/gadgetfs.h 'g' 20-2F linux/usb/g_printer.h 'h' 00-7F conflict! Charon filesystem
diff --git a/include/uapi/linux/fsverity.h b/include/uapi/linux/fsverity.h
new file mode 100644
index 000000000000..57d1d7fc0c34
--- /dev/null
+++ b/include/uapi/linux/fsverity.h@@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * fs-verity user API + * + * These ioctls can be used on filesystems that support fs-verity. See the + * "User API" section of Documentation/filesystems/fsverity.rst. + * + * Copyright 2019 Google LLC + */ +#ifndef _UAPI_LINUX_FSVERITY_H +#define _UAPI_LINUX_FSVERITY_H + +#include <linux/ioctl.h> +#include <linux/types.h> + +#define FS_VERITY_HASH_ALG_SHA256 1 + +struct fsverity_enable_arg { + __u32 version; + __u32 hash_algorithm; + __u32 block_size; + __u32 salt_size; + __u64 salt_ptr; + __u32 sig_size; + __u32 __reserved1; + __u64 sig_ptr; + __u64 __reserved2[11]; +}; + +struct fsverity_digest { + __u16 digest_algorithm; + __u16 digest_size; /* input/output */ + __u8 digest[]; +}; + +#define FS_IOC_ENABLE_VERITY _IOW('f', 133, struct fsverity_enable_arg) +#define FS_IOC_MEASURE_VERITY _IOWR('f', 134, struct fsverity_digest) + +#endif /* _UAPI_LINUX_FSVERITY_H */
--
2.21.0