208 lines
8.0 KiB
C
208 lines
8.0 KiB
C
#ifndef _UAPI_LINUX_FS_H
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#define _UAPI_LINUX_FS_H
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/*
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* This file has definitions for some important file table
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* structures etc.
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*/
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#include <linux/limits.h>
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/*
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* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
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* the file limit at runtime and only root can increase the per-process
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* nr_file rlimit, so it's safe to set up a ridiculously high absolute
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* upper limit on files-per-process.
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*
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* Some programs (notably those using select()) may have to be
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* recompiled to take full advantage of the new limits..
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*/
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/* Fixed constants first: */
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#undef NR_OPEN
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#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
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#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
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#define BLOCK_SIZE_BITS 10
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#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
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#define SEEK_SET 0 /* seek relative to beginning of file */
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#define SEEK_CUR 1 /* seek relative to current file position */
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#define SEEK_END 2 /* seek relative to end of file */
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#define SEEK_DATA 3 /* seek to the next data */
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#define SEEK_HOLE 4 /* seek to the next hole */
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#define SEEK_MAX SEEK_HOLE
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#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
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#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
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struct fstrim_range {
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__u64 start;
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__u64 len;
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__u64 minlen;
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};
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/* And dynamically-tunable limits and defaults: */
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struct files_stat_struct {
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unsigned long nr_files; /* read only */
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unsigned long nr_free_files; /* read only */
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unsigned long max_files; /* tunable */
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};
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struct inodes_stat_t {
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long nr_inodes;
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long nr_unused;
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long dummy[5]; /* padding for sysctl ABI compatibility */
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};
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#define NR_FILE 8192 /* this can well be larger on a larger system */
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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*/
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#define MS_RDONLY 1 /* Mount read-only */
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#define MS_NOSUID 2 /* Ignore suid and sgid bits */
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#define MS_NODEV 4 /* Disallow access to device special files */
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#define MS_NOEXEC 8 /* Disallow program execution */
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#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
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#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
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#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
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#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
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#define MS_NOATIME 1024 /* Do not update access times. */
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#define MS_NODIRATIME 2048 /* Do not update directory access times */
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#define MS_BIND 4096
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#define MS_MOVE 8192
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#define MS_REC 16384
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#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
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MS_VERBOSE is deprecated. */
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#define MS_SILENT 32768
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#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
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#define MS_UNBINDABLE (1<<17) /* change to unbindable */
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#define MS_PRIVATE (1<<18) /* change to private */
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#define MS_SLAVE (1<<19) /* change to slave */
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#define MS_SHARED (1<<20) /* change to shared */
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#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
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#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
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#define MS_I_VERSION (1<<23) /* Update inode I_version field */
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#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
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/* These sb flags are internal to the kernel */
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#define MS_NOSEC (1<<28)
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#define MS_BORN (1<<29)
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#define MS_ACTIVE (1<<30)
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#define MS_NOUSER (1<<31)
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/*
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* Superblock flags that can be altered by MS_REMOUNT
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*/
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#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)
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/*
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* Old magic mount flag and mask
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*/
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#define MS_MGC_VAL 0xC0ED0000
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#define MS_MGC_MSK 0xffff0000
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/* the read-only stuff doesn't really belong here, but any other place is
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probably as bad and I don't want to create yet another include file. */
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#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
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#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
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#define BLKRRPART _IO(0x12,95) /* re-read partition table */
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#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
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#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
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#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
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#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
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#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
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#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
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#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
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#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
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#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
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#if 0
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#define BLKPG _IO(0x12,105)/* See blkpg.h */
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/* Some people are morons. Do not use sizeof! */
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#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
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#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
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/* This was here just to show that the number is taken -
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probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
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#endif
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/* A jump here: 108-111 have been used for various private purposes. */
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#define BLKBSZGET _IOR(0x12,112,size_t)
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#define BLKBSZSET _IOW(0x12,113,size_t)
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#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
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#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
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#define BLKTRACESTART _IO(0x12,116)
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#define BLKTRACESTOP _IO(0x12,117)
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#define BLKTRACETEARDOWN _IO(0x12,118)
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#define BLKDISCARD _IO(0x12,119)
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#define BLKIOMIN _IO(0x12,120)
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#define BLKIOOPT _IO(0x12,121)
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#define BLKALIGNOFF _IO(0x12,122)
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#define BLKPBSZGET _IO(0x12,123)
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#define BLKDISCARDZEROES _IO(0x12,124)
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#define BLKSECDISCARD _IO(0x12,125)
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#define BLKROTATIONAL _IO(0x12,126)
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#define BLKZEROOUT _IO(0x12,127)
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#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
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#define FIBMAP _IO(0x00,1) /* bmap access */
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#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
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#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
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#define FITHAW _IOWR('X', 120, int) /* Thaw */
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#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
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#define FS_IOC_GETFLAGS _IOR('f', 1, long)
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#define FS_IOC_SETFLAGS _IOW('f', 2, long)
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#define FS_IOC_GETVERSION _IOR('v', 1, long)
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#define FS_IOC_SETVERSION _IOW('v', 2, long)
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#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
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#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
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#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
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#define FS_IOC32_GETVERSION _IOR('v', 1, int)
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#define FS_IOC32_SETVERSION _IOW('v', 2, int)
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/*
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* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
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*/
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#define FS_SECRM_FL 0x00000001 /* Secure deletion */
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#define FS_UNRM_FL 0x00000002 /* Undelete */
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#define FS_COMPR_FL 0x00000004 /* Compress file */
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#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
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#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
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#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
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#define FS_NODUMP_FL 0x00000040 /* do not dump file */
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#define FS_NOATIME_FL 0x00000080 /* do not update atime */
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/* Reserved for compression usage... */
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#define FS_DIRTY_FL 0x00000100
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#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
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#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
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#define FS_ECOMPR_FL 0x00000800 /* Compression error */
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/* End compression flags --- maybe not all used */
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#define FS_BTREE_FL 0x00001000 /* btree format dir */
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#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
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#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
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#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
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#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
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#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
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#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
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#define FS_EXTENT_FL 0x00080000 /* Extents */
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#define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
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#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
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#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
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#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
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#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
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#define SYNC_FILE_RANGE_WAIT_BEFORE 1
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#define SYNC_FILE_RANGE_WRITE 2
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#define SYNC_FILE_RANGE_WAIT_AFTER 4
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#endif /* _UAPI_LINUX_FS_H */
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