forked from mirrors/linux
0f9ca80fa4
Extend statx system call to return additional info for atomic write support support for a file. Helper function generic_fill_statx_atomic_writes() can be used by FSes to fill in the relevant statx fields. For now atomic_write_segments_max will always be 1, otherwise some rules would need to be imposed on iovec length and alignment, which we don't want now. Signed-off-by: Prasad Singamsetty <prasad.singamsetty@oracle.com> jpg: relocate bdev support to another patch Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20240620125359.2684798-5-john.g.garry@oracle.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_STAT_H
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#define _LINUX_STAT_H
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#include <asm/stat.h>
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#include <uapi/linux/stat.h>
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#define S_IRWXUGO (S_IRWXU|S_IRWXG|S_IRWXO)
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#define S_IALLUGO (S_ISUID|S_ISGID|S_ISVTX|S_IRWXUGO)
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#define S_IRUGO (S_IRUSR|S_IRGRP|S_IROTH)
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#define S_IWUGO (S_IWUSR|S_IWGRP|S_IWOTH)
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#define S_IXUGO (S_IXUSR|S_IXGRP|S_IXOTH)
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#define UTIME_NOW ((1l << 30) - 1l)
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#define UTIME_OMIT ((1l << 30) - 2l)
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/uidgid.h>
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struct kstat {
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u32 result_mask; /* What fields the user got */
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umode_t mode;
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unsigned int nlink;
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uint32_t blksize; /* Preferred I/O size */
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u64 attributes;
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u64 attributes_mask;
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#define KSTAT_ATTR_FS_IOC_FLAGS \
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(STATX_ATTR_COMPRESSED | \
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STATX_ATTR_IMMUTABLE | \
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STATX_ATTR_APPEND | \
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STATX_ATTR_NODUMP | \
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STATX_ATTR_ENCRYPTED | \
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STATX_ATTR_VERITY \
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)/* Attrs corresponding to FS_*_FL flags */
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#define KSTAT_ATTR_VFS_FLAGS \
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(STATX_ATTR_IMMUTABLE | \
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STATX_ATTR_APPEND \
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) /* Attrs corresponding to S_* flags that are enforced by the VFS */
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u64 ino;
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dev_t dev;
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dev_t rdev;
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kuid_t uid;
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kgid_t gid;
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loff_t size;
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struct timespec64 atime;
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struct timespec64 mtime;
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struct timespec64 ctime;
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struct timespec64 btime; /* File creation time */
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u64 blocks;
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u64 mnt_id;
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u32 dio_mem_align;
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u32 dio_offset_align;
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u64 change_cookie;
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u64 subvol;
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u32 atomic_write_unit_min;
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u32 atomic_write_unit_max;
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u32 atomic_write_segments_max;
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};
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/* These definitions are internal to the kernel for now. Mainly used by nfsd. */
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/* mask values */
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#define STATX_CHANGE_COOKIE 0x40000000U /* Want/got stx_change_attr */
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/* file attribute values */
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#define STATX_ATTR_CHANGE_MONOTONIC 0x8000000000000000ULL /* version monotonically increases */
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#endif
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