mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-28 21:13:06 +00:00
7ed6cbe0f8
Add a separate dio read align field, as many out of place write file systems can easily do reads aligned to the device sector size, but require bigger alignment for writes. This is usually papered over by falling back to buffered I/O for smaller writes and doing read-modify-write cycles, but performance for this sucks, so applications benefit from knowing the actual write alignment. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20250109083109.1441561-3-hch@lst.de Reviewed-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
72 lines
1.8 KiB
C
72 lines
1.8 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>
|
|
|
|
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 */
|
|
#define KSTAT_ATTR_VFS_FLAGS \
|
|
(STATX_ATTR_IMMUTABLE | \
|
|
STATX_ATTR_APPEND \
|
|
) /* Attrs corresponding to S_* flags that are enforced by the VFS */
|
|
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;
|
|
u64 mnt_id;
|
|
u32 dio_mem_align;
|
|
u32 dio_offset_align;
|
|
u32 dio_read_offset_align;
|
|
u64 change_cookie;
|
|
u64 subvol;
|
|
u32 atomic_write_unit_min;
|
|
u32 atomic_write_unit_max;
|
|
u32 atomic_write_segments_max;
|
|
};
|
|
|
|
/* These definitions are internal to the kernel for now. Mainly used by nfsd. */
|
|
|
|
/* mask values */
|
|
#define STATX_CHANGE_COOKIE 0x40000000U /* Want/got stx_change_attr */
|
|
|
|
/* file attribute values */
|
|
#define STATX_ATTR_CHANGE_MONOTONIC 0x8000000000000000ULL /* version monotonically increases */
|
|
|
|
#endif
|