From: Eric Biggers <ebiggers@xxxxxxxxxx> More fscrypt definitions are being added, and we shouldn't use a disproportionate amount of space in <linux/fs.h> for fscrypt stuff. So move the fscrypt definitions to a new header <linux/fscrypt.h>. For source compatibility with existing userspace programs, <linux/fs.h> still includes the new header. Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> --- MAINTAINERS | 1 + include/linux/fscrypt.h | 1 + include/uapi/linux/fs.h | 54 ++------------------------------- include/uapi/linux/fscrypt.h | 58 ++++++++++++++++++++++++++++++++++++ 4 files changed, 63 insertions(+), 51 deletions(-) create mode 100644 include/uapi/linux/fscrypt.h diff --git a/MAINTAINERS b/MAINTAINERS index 43b36dbed48e7..3b84bf3bf7cae 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6351,6 +6351,7 @@ T: git git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git S: Supported F: fs/crypto/ F: include/linux/fscrypt*.h +F: include/uapi/linux/fscrypt.h F: Documentation/filesystems/fscrypt.rst FSI-ATTACHED I2C DRIVER diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h index e5194fc3983e9..8b1e444214973 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -16,6 +16,7 @@ #include <linux/fs.h> #include <linux/mm.h> #include <linux/slab.h> +#include <uapi/linux/fscrypt.h> #define FS_CRYPTO_BLOCK_SIZE 16 diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 121e82ce296b5..0f4e66b1bcd09 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -13,6 +13,9 @@ #include <linux/limits.h> #include <linux/ioctl.h> #include <linux/types.h> +#ifndef __KERNEL__ +#include <linux/fscrypt.h> +#endif /* Use of MS_* flags within the kernel is restricted to core mount(2) code. */ #if !defined(__KERNEL__) @@ -212,57 +215,6 @@ struct fsxattr { #define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX]) #define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX]) -/* - * File system encryption support - */ -/* Policy provided via an ioctl on the topmost directory */ -#define FS_KEY_DESCRIPTOR_SIZE 8 - -#define FS_POLICY_FLAGS_PAD_4 0x00 -#define FS_POLICY_FLAGS_PAD_8 0x01 -#define FS_POLICY_FLAGS_PAD_16 0x02 -#define FS_POLICY_FLAGS_PAD_32 0x03 -#define FS_POLICY_FLAGS_PAD_MASK 0x03 -#define FS_POLICY_FLAG_DIRECT_KEY 0x04 /* use master key directly */ -#define FS_POLICY_FLAGS_VALID 0x07 - -/* Encryption algorithms */ -#define FS_ENCRYPTION_MODE_INVALID 0 -#define FS_ENCRYPTION_MODE_AES_256_XTS 1 -#define FS_ENCRYPTION_MODE_AES_256_GCM 2 -#define FS_ENCRYPTION_MODE_AES_256_CBC 3 -#define FS_ENCRYPTION_MODE_AES_256_CTS 4 -#define FS_ENCRYPTION_MODE_AES_128_CBC 5 -#define FS_ENCRYPTION_MODE_AES_128_CTS 6 -#define FS_ENCRYPTION_MODE_SPECK128_256_XTS 7 /* Removed, do not use. */ -#define FS_ENCRYPTION_MODE_SPECK128_256_CTS 8 /* Removed, do not use. */ -#define FS_ENCRYPTION_MODE_ADIANTUM 9 - -struct fscrypt_policy { - __u8 version; - __u8 contents_encryption_mode; - __u8 filenames_encryption_mode; - __u8 flags; - __u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE]; -}; - -#define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy) -#define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16]) -#define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy) - -/* Parameters for passing an encryption key into the kernel keyring */ -#define FS_KEY_DESC_PREFIX "fscrypt:" -#define FS_KEY_DESC_PREFIX_SIZE 8 - -/* Structure that userspace passes to the kernel keyring */ -#define FS_MAX_KEY_SIZE 64 - -struct fscrypt_key { - __u32 mode; - __u8 raw[FS_MAX_KEY_SIZE]; - __u32 size; -}; - /* * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) * diff --git a/include/uapi/linux/fscrypt.h b/include/uapi/linux/fscrypt.h new file mode 100644 index 0000000000000..193339cb53fdb --- /dev/null +++ b/include/uapi/linux/fscrypt.h @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_FSCRYPT_H +#define _UAPI_LINUX_FSCRYPT_H + +#include <linux/types.h> + +/* + * File system encryption support + */ +/* Policy provided via an ioctl on the topmost directory */ +#define FS_KEY_DESCRIPTOR_SIZE 8 + +#define FS_POLICY_FLAGS_PAD_4 0x00 +#define FS_POLICY_FLAGS_PAD_8 0x01 +#define FS_POLICY_FLAGS_PAD_16 0x02 +#define FS_POLICY_FLAGS_PAD_32 0x03 +#define FS_POLICY_FLAGS_PAD_MASK 0x03 +#define FS_POLICY_FLAG_DIRECT_KEY 0x04 /* use master key directly */ +#define FS_POLICY_FLAGS_VALID 0x07 + +/* Encryption algorithms */ +#define FS_ENCRYPTION_MODE_INVALID 0 +#define FS_ENCRYPTION_MODE_AES_256_XTS 1 +#define FS_ENCRYPTION_MODE_AES_256_GCM 2 +#define FS_ENCRYPTION_MODE_AES_256_CBC 3 +#define FS_ENCRYPTION_MODE_AES_256_CTS 4 +#define FS_ENCRYPTION_MODE_AES_128_CBC 5 +#define FS_ENCRYPTION_MODE_AES_128_CTS 6 +#define FS_ENCRYPTION_MODE_SPECK128_256_XTS 7 /* Removed, do not use. */ +#define FS_ENCRYPTION_MODE_SPECK128_256_CTS 8 /* Removed, do not use. */ +#define FS_ENCRYPTION_MODE_ADIANTUM 9 + +struct fscrypt_policy { + __u8 version; + __u8 contents_encryption_mode; + __u8 filenames_encryption_mode; + __u8 flags; + __u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE]; +}; + +#define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy) +#define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16]) +#define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy) + +/* Parameters for passing an encryption key into the kernel keyring */ +#define FS_KEY_DESC_PREFIX "fscrypt:" +#define FS_KEY_DESC_PREFIX_SIZE 8 + +/* Structure that userspace passes to the kernel keyring */ +#define FS_MAX_KEY_SIZE 64 + +struct fscrypt_key { + __u32 mode; + __u8 raw[FS_MAX_KEY_SIZE]; + __u32 size; +}; + +#endif /* _UAPI_LINUX_FSCRYPT_H */ -- 2.21.0
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