330 lines
13 KiB
C
330 lines
13 KiB
C
#ifndef _UAPI_LINUX_FS_H
|
|
#define _UAPI_LINUX_FS_H
|
|
|
|
/*
|
|
* This file has definitions for some important file table structures
|
|
* and constants and structures used by various generic file system
|
|
* ioctl's. Please do not make any changes in this file before
|
|
* sending patches for review to linux-fsdevel@vger.kernel.org and
|
|
* linux-api@vger.kernel.org.
|
|
*/
|
|
|
|
#include <linux/limits.h>
|
|
#include <linux/ioctl.h>
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
|
|
* the file limit at runtime and only root can increase the per-process
|
|
* nr_file rlimit, so it's safe to set up a ridiculously high absolute
|
|
* upper limit on files-per-process.
|
|
*
|
|
* Some programs (notably those using select()) may have to be
|
|
* recompiled to take full advantage of the new limits..
|
|
*/
|
|
|
|
/* Fixed constants first: */
|
|
#undef NR_OPEN
|
|
#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
|
|
#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
|
|
|
|
#define BLOCK_SIZE_BITS 10
|
|
#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
|
|
|
|
#define SEEK_SET 0 /* seek relative to beginning of file */
|
|
#define SEEK_CUR 1 /* seek relative to current file position */
|
|
#define SEEK_END 2 /* seek relative to end of file */
|
|
#define SEEK_DATA 3 /* seek to the next data */
|
|
#define SEEK_HOLE 4 /* seek to the next hole */
|
|
#define SEEK_MAX SEEK_HOLE
|
|
|
|
#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
|
|
#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
|
|
#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
|
|
|
|
struct file_clone_range {
|
|
__s64 src_fd;
|
|
__u64 src_offset;
|
|
__u64 src_length;
|
|
__u64 dest_offset;
|
|
};
|
|
|
|
struct fstrim_range {
|
|
__u64 start;
|
|
__u64 len;
|
|
__u64 minlen;
|
|
};
|
|
|
|
/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
|
|
#define FILE_DEDUPE_RANGE_SAME 0
|
|
#define FILE_DEDUPE_RANGE_DIFFERS 1
|
|
|
|
/* from struct btrfs_ioctl_file_extent_same_info */
|
|
struct file_dedupe_range_info {
|
|
__s64 dest_fd; /* in - destination file */
|
|
__u64 dest_offset; /* in - start of extent in destination */
|
|
__u64 bytes_deduped; /* out - total # of bytes we were able
|
|
* to dedupe from this file. */
|
|
/* status of this dedupe operation:
|
|
* < 0 for error
|
|
* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
|
|
* == FILE_DEDUPE_RANGE_DIFFERS if data differs
|
|
*/
|
|
__s32 status; /* out - see above description */
|
|
__u32 reserved; /* must be zero */
|
|
};
|
|
|
|
/* from struct btrfs_ioctl_file_extent_same_args */
|
|
struct file_dedupe_range {
|
|
__u64 src_offset; /* in - start of extent in source */
|
|
__u64 src_length; /* in - length of extent */
|
|
__u16 dest_count; /* in - total elements in info array */
|
|
__u16 reserved1; /* must be zero */
|
|
__u32 reserved2; /* must be zero */
|
|
struct file_dedupe_range_info info[0];
|
|
};
|
|
|
|
/* And dynamically-tunable limits and defaults: */
|
|
struct files_stat_struct {
|
|
unsigned long nr_files; /* read only */
|
|
unsigned long nr_free_files; /* read only */
|
|
unsigned long max_files; /* tunable */
|
|
};
|
|
|
|
struct inodes_stat_t {
|
|
long nr_inodes;
|
|
long nr_unused;
|
|
long dummy[5]; /* padding for sysctl ABI compatibility */
|
|
};
|
|
|
|
|
|
#define NR_FILE 8192 /* this can well be larger on a larger system */
|
|
|
|
|
|
/*
|
|
* These are the fs-independent mount-flags: up to 32 flags are supported
|
|
*/
|
|
#define MS_RDONLY 1 /* Mount read-only */
|
|
#define MS_NOSUID 2 /* Ignore suid and sgid bits */
|
|
#define MS_NODEV 4 /* Disallow access to device special files */
|
|
#define MS_NOEXEC 8 /* Disallow program execution */
|
|
#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
|
|
#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
|
|
#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
|
|
#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
|
|
#define MS_NOATIME 1024 /* Do not update access times. */
|
|
#define MS_NODIRATIME 2048 /* Do not update directory access times */
|
|
#define MS_BIND 4096
|
|
#define MS_MOVE 8192
|
|
#define MS_REC 16384
|
|
#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
|
|
MS_VERBOSE is deprecated. */
|
|
#define MS_SILENT 32768
|
|
#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
|
|
#define MS_UNBINDABLE (1<<17) /* change to unbindable */
|
|
#define MS_PRIVATE (1<<18) /* change to private */
|
|
#define MS_SLAVE (1<<19) /* change to slave */
|
|
#define MS_SHARED (1<<20) /* change to shared */
|
|
#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
|
|
#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
|
|
#define MS_I_VERSION (1<<23) /* Update inode I_version field */
|
|
#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
|
|
#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
|
|
|
|
/* These sb flags are internal to the kernel */
|
|
#define MS_NOSEC (1<<28)
|
|
#define MS_BORN (1<<29)
|
|
#define MS_ACTIVE (1<<30)
|
|
#define MS_NOUSER (1<<31)
|
|
|
|
/*
|
|
* Superblock flags that can be altered by MS_REMOUNT
|
|
*/
|
|
#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION|\
|
|
MS_LAZYTIME)
|
|
|
|
/*
|
|
* Old magic mount flag and mask
|
|
*/
|
|
#define MS_MGC_VAL 0xC0ED0000
|
|
#define MS_MGC_MSK 0xffff0000
|
|
|
|
/*
|
|
* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
|
|
*/
|
|
struct fsxattr {
|
|
__u32 fsx_xflags; /* xflags field value (get/set) */
|
|
__u32 fsx_extsize; /* extsize field value (get/set)*/
|
|
__u32 fsx_nextents; /* nextents field value (get) */
|
|
__u32 fsx_projid; /* project identifier (get/set) */
|
|
unsigned char fsx_pad[12];
|
|
};
|
|
|
|
/*
|
|
* Flags for the fsx_xflags field
|
|
*/
|
|
#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
|
|
#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
|
|
#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
|
|
#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
|
|
#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
|
|
#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
|
|
#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
|
|
#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
|
|
#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
|
|
#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
|
|
#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
|
|
#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
|
|
#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
|
|
#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
|
|
#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
|
|
#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
|
|
|
|
/* the read-only stuff doesn't really belong here, but any other place is
|
|
probably as bad and I don't want to create yet another include file. */
|
|
|
|
#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
|
|
#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
|
|
#define BLKRRPART _IO(0x12,95) /* re-read partition table */
|
|
#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
|
|
#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
|
|
#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
|
|
#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
|
|
#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
|
|
#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
|
|
#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
|
|
#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
|
|
#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
|
|
#if 0
|
|
#define BLKPG _IO(0x12,105)/* See blkpg.h */
|
|
|
|
/* Some people are morons. Do not use sizeof! */
|
|
|
|
#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
|
|
#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
|
|
/* This was here just to show that the number is taken -
|
|
probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
|
|
#endif
|
|
/* A jump here: 108-111 have been used for various private purposes. */
|
|
#define BLKBSZGET _IOR(0x12,112,size_t)
|
|
#define BLKBSZSET _IOW(0x12,113,size_t)
|
|
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
|
|
#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
|
|
#define BLKTRACESTART _IO(0x12,116)
|
|
#define BLKTRACESTOP _IO(0x12,117)
|
|
#define BLKTRACETEARDOWN _IO(0x12,118)
|
|
#define BLKDISCARD _IO(0x12,119)
|
|
#define BLKIOMIN _IO(0x12,120)
|
|
#define BLKIOOPT _IO(0x12,121)
|
|
#define BLKALIGNOFF _IO(0x12,122)
|
|
#define BLKPBSZGET _IO(0x12,123)
|
|
#define BLKDISCARDZEROES _IO(0x12,124)
|
|
#define BLKSECDISCARD _IO(0x12,125)
|
|
#define BLKROTATIONAL _IO(0x12,126)
|
|
#define BLKZEROOUT _IO(0x12,127)
|
|
|
|
#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
|
|
#define FIBMAP _IO(0x00,1) /* bmap access */
|
|
#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
|
|
#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
|
|
#define FITHAW _IOWR('X', 120, int) /* Thaw */
|
|
#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
|
|
#define FICLONE _IOW(0x94, 9, int)
|
|
#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
|
|
#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
|
|
|
|
#define FS_IOC_GETFLAGS _IOR('f', 1, long)
|
|
#define FS_IOC_SETFLAGS _IOW('f', 2, long)
|
|
#define FS_IOC_GETVERSION _IOR('v', 1, long)
|
|
#define FS_IOC_SETVERSION _IOW('v', 2, long)
|
|
#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
|
|
#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
|
|
#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
|
|
#define FS_IOC32_GETVERSION _IOR('v', 1, int)
|
|
#define FS_IOC32_SETVERSION _IOW('v', 2, int)
|
|
#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
|
|
#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
|
|
|
|
/*
|
|
* File system encryption support
|
|
*/
|
|
/* Policy provided via an ioctl on the topmost directory */
|
|
#define FS_KEY_DESCRIPTOR_SIZE 8
|
|
|
|
struct fscrypt_policy {
|
|
__u8 version;
|
|
__u8 contents_encryption_mode;
|
|
__u8 filenames_encryption_mode;
|
|
__u8 flags;
|
|
__u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
|
|
} __packed;
|
|
|
|
#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)
|
|
|
|
/*
|
|
* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
|
|
*
|
|
* Note: for historical reasons, these flags were originally used and
|
|
* defined for use by ext2/ext3, and then other file systems started
|
|
* using these flags so they wouldn't need to write their own version
|
|
* of chattr/lsattr (which was shipped as part of e2fsprogs). You
|
|
* should think twice before trying to use these flags in new
|
|
* contexts, or trying to assign these flags, since they are used both
|
|
* as the UAPI and the on-disk encoding for ext2/3/4. Also, we are
|
|
* almost out of 32-bit flags. :-)
|
|
*
|
|
* We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
|
|
* XFS to the generic FS level interface. This uses a structure that
|
|
* has padding and hence has more room to grow, so it may be more
|
|
* appropriate for many new use cases.
|
|
*
|
|
* Please do not change these flags or interfaces before checking with
|
|
* linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
|
|
*/
|
|
#define FS_SECRM_FL 0x00000001 /* Secure deletion */
|
|
#define FS_UNRM_FL 0x00000002 /* Undelete */
|
|
#define FS_COMPR_FL 0x00000004 /* Compress file */
|
|
#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
|
|
#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
|
|
#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
|
|
#define FS_NODUMP_FL 0x00000040 /* do not dump file */
|
|
#define FS_NOATIME_FL 0x00000080 /* do not update atime */
|
|
/* Reserved for compression usage... */
|
|
#define FS_DIRTY_FL 0x00000100
|
|
#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
|
|
#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
|
|
/* End compression flags --- maybe not all used */
|
|
#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */
|
|
#define FS_BTREE_FL 0x00001000 /* btree format dir */
|
|
#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
|
|
#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
|
|
#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
|
|
#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
|
|
#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
|
|
#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
|
|
#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */
|
|
#define FS_EXTENT_FL 0x00080000 /* Extents */
|
|
#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
|
|
#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
|
|
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
|
|
#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
|
|
#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
|
|
#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
|
|
|
|
#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
|
|
#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
|
|
|
|
|
|
#define SYNC_FILE_RANGE_WAIT_BEFORE 1
|
|
#define SYNC_FILE_RANGE_WRITE 2
|
|
#define SYNC_FILE_RANGE_WAIT_AFTER 4
|
|
|
|
/* flags for preadv2/pwritev2: */
|
|
#define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */
|
|
#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */
|
|
#define RWF_SYNC 0x00000004 /* per-IO O_SYNC */
|
|
|
|
#endif /* _UAPI_LINUX_FS_H */
|