linux-stable/include/linux/stat.h
Eric Biggers 3ad2522c64 statx: define STATX_ATTR_VERITY
Add a statx attribute bit STATX_ATTR_VERITY which will be set if the
file has fs-verity enabled.  This is the statx() equivalent of
FS_VERITY_FL which is returned by FS_IOC_GETFLAGS.

This is useful because it allows applications to check whether a file is
a verity file without opening it.  Opening a verity file can be
expensive because the fsverity_info is set up on open, which involves
parsing metadata and optionally verifying a cryptographic signature.

This is analogous to how various other bits are exposed through both
FS_IOC_GETFLAGS and statx(), e.g. the encrypt bit.

Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Acked-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
2019-11-13 12:15:34 -08:00

52 lines
1.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_STAT_H
#define _LINUX_STAT_H
#include <asm/stat.h>
#include <uapi/linux/stat.h>
#define S_IRWXUGO (S_IRWXU|S_IRWXG|S_IRWXO)
#define S_IALLUGO (S_ISUID|S_ISGID|S_ISVTX|S_IRWXUGO)
#define S_IRUGO (S_IRUSR|S_IRGRP|S_IROTH)
#define S_IWUGO (S_IWUSR|S_IWGRP|S_IWOTH)
#define S_IXUGO (S_IXUSR|S_IXGRP|S_IXOTH)
#define UTIME_NOW ((1l << 30) - 1l)
#define UTIME_OMIT ((1l << 30) - 2l)
#include <linux/types.h>
#include <linux/time.h>
#include <linux/uidgid.h>
#define KSTAT_QUERY_FLAGS (AT_STATX_SYNC_TYPE)
struct kstat {
u32 result_mask; /* What fields the user got */
umode_t mode;
unsigned int nlink;
uint32_t blksize; /* Preferred I/O size */
u64 attributes;
u64 attributes_mask;
#define KSTAT_ATTR_FS_IOC_FLAGS \
(STATX_ATTR_COMPRESSED | \
STATX_ATTR_IMMUTABLE | \
STATX_ATTR_APPEND | \
STATX_ATTR_NODUMP | \
STATX_ATTR_ENCRYPTED | \
STATX_ATTR_VERITY \
)/* Attrs corresponding to FS_*_FL flags */
u64 ino;
dev_t dev;
dev_t rdev;
kuid_t uid;
kgid_t gid;
loff_t size;
struct timespec64 atime;
struct timespec64 mtime;
struct timespec64 ctime;
struct timespec64 btime; /* File creation time */
u64 blocks;
};
#endif