Quellcode-Bibliothek ext4.h Sprache: unbekannt

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_LINUX_EXT4_H
#define _UAPI_LINUX_EXT4_H
#include <linux/fiemap.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/types.h>

/*
* ext4-specific ioctl commands
*/
#define EXT4_IOC_GETVERSION  _IOR('f', 3, long)
#define EXT4_IOC_SETVERSION  _IOW('f', 4, long)
#define EXT4_IOC_GETVERSION_OLD  FS_IOC_GETVERSION
#define EXT4_IOC_SETVERSION_OLD  FS_IOC_SETVERSION
#define EXT4_IOC_GETRSVSZ  _IOR('f', 5, long)
#define EXT4_IOC_SETRSVSZ  _IOW('f', 6, long)
#define EXT4_IOC_GROUP_EXTEND  _IOW('f', 7, unsigned long)
#define EXT4_IOC_GROUP_ADD  _IOW('f', 8, struct ext4_new_group_input)
#define EXT4_IOC_MIGRATE  _IO('f', 9)
/* note ioctl 10 reserved for an early version of the FIEMAP ioctl */
/* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */
#define EXT4_IOC_ALLOC_DA_BLKS  _IO('f', 12)
#define EXT4_IOC_MOVE_EXT  _IOWR('f', 15, struct move_extent)
#define EXT4_IOC_RESIZE_FS  _IOW('f', 16, __u64)
#define EXT4_IOC_SWAP_BOOT  _IO('f', 17)
#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18)
/* ioctl codes 19--39 are reserved for fscrypt */
#define EXT4_IOC_CLEAR_ES_CACHE  _IO('f', 40)
#define EXT4_IOC_GETSTATE  _IOW('f', 41, __u32)
#define EXT4_IOC_GET_ES_CACHE  _IOWR('f', 42, struct fiemap)
#define EXT4_IOC_CHECKPOINT  _IOW('f', 43, __u32)
#define EXT4_IOC_GETFSUUID  _IOR('f', 44, struct fsuuid)
#define EXT4_IOC_SETFSUUID  _IOW('f', 44, struct fsuuid)

#define EXT4_IOC_SHUTDOWN _IOR('X', 125, __u32)

/*
* ioctl commands in 32 bit emulation
*/
#define EXT4_IOC32_GETVERSION  _IOR('f', 3, int)
#define EXT4_IOC32_SETVERSION  _IOW('f', 4, int)
#define EXT4_IOC32_GETRSVSZ  _IOR('f', 5, int)
#define EXT4_IOC32_SETRSVSZ  _IOW('f', 6, int)
#define EXT4_IOC32_GROUP_EXTEND  _IOW('f', 7, unsigned int)
#define EXT4_IOC32_GROUP_ADD  _IOW('f', 8, struct compat_ext4_new_group_input)
#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION
#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION

/*
* Flags returned by EXT4_IOC_GETSTATE
*
* We only expose to userspace a subset of the state flags in
* i_state_flags
*/
#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001
#define EXT4_STATE_FLAG_NEW  0x00000002
#define EXT4_STATE_FLAG_NEWENTRY 0x00000004
#define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008

/*
* Flags for ioctl EXT4_IOC_CHECKPOINT
*/
#define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1
#define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2
#define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4
#define EXT4_IOC_CHECKPOINT_FLAG_VALID  (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \
      EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \
      EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN)

/*
* Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID
*/
struct fsuuid {
__u32       fsu_len;
__u32       fsu_flags;
__u8        fsu_uuid[];
};

/*
* Structure for EXT4_IOC_MOVE_EXT
*/
struct move_extent {
__u32 reserved;  /* should be zero */
__u32 donor_fd;  /* donor file descriptor */
__u64 orig_start; /* logical start offset in block for orig */
__u64 donor_start; /* logical start offset in block for donor */
__u64 len;  /* block length to be moved */
__u64 moved_len; /* moved block length */
};

/*
* Flags used by EXT4_IOC_SHUTDOWN
*/
#define EXT4_GOING_FLAGS_DEFAULT  0x0 /* going down */
#define EXT4_GOING_FLAGS_LOGFLUSH  0x1 /* flush log but not data */
#define EXT4_GOING_FLAGS_NOLOGFLUSH  0x2 /* don't flush log nor data */

/* Used to pass group descriptor data when online resize is done */
struct ext4_new_group_input {
__u32 group;  /* Group number for this data */
__u64 block_bitmap; /* Absolute block number of block bitmap */
__u64 inode_bitmap; /* Absolute block number of inode bitmap */
__u64 inode_table; /* Absolute block number of inode table start */
__u32 blocks_count; /* Total number of blocks in this group */
__u16 reserved_blocks; /* Number of reserved blocks in this group */
__u16 unused;
};

/*
* Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag.
* It indicates that the entry in extent status cache is for a hole.
*/
#define EXT4_FIEMAP_EXTENT_HOLE  0x08000000

#endif /* _UAPI_LINUX_EXT4_H */

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Quellcode-Bibliothek ext4.h Sprache: unbekannt

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