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1: #ifndef _UAPI_LINUX_FS_H 2: #define _UAPI_LINUX_FS_H 3: 4: /* 5: * This file has definitions for some important file table 6: * structures etc. 7: */ 8: 9: #include <linux/limits.h> 10: #include <linux/ioctl.h> 11: #include <linux/types.h> 12: 13: /* 14: * It's silly to have NR_OPEN bigger than NR_FILE, but you can change 15: * the file limit at runtime and only root can increase the per-process 16: * nr_file rlimit, so it's safe to set up a ridiculously high absolute 17: * upper limit on files-per-process. 18: * 19: * Some programs (notably those using select()) may have to be 20: * recompiled to take full advantage of the new limits.. 21: */ 22: 23: /* Fixed constants first: */ 24: #undef NR_OPEN 25: #define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ 26: #define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ 27: 28: #define BLOCK_SIZE_BITS 10 29: #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) 30: 31: #define SEEK_SET 0 /* seek relative to beginning of file */ 32: #define SEEK_CUR 1 /* seek relative to current file position */ 33: #define SEEK_END 2 /* seek relative to end of file */ 34: #define SEEK_DATA 3 /* seek to the next data */ 35: #define SEEK_HOLE 4 /* seek to the next hole */ 36: #define SEEK_MAX SEEK_HOLE 37: 38: struct fstrim_range { 39: __u64 start; 40: __u64 len; 41: __u64 minlen; 42: }; 43: 44: /* And dynamically-tunable limits and defaults: */ 45: struct files_stat_struct { 46: unsigned long nr_files; /* read only */ 47: unsigned long nr_free_files; /* read only */ 48: unsigned long max_files; /* tunable */ 49: }; 50: 51: struct inodes_stat_t { 52: long nr_inodes; 53: long nr_unused; 54: long dummy[5]; /* padding for sysctl ABI compatibility */ 55: }; 56: 57: 58: #define NR_FILE 8192 /* this can well be larger on a larger system */ 59: 60: 61: /* 62: * These are the fs-independent mount-flags: up to 32 flags are supported 63: */ 64: #define MS_RDONLY 1 /* Mount read-only */ 65: #define MS_NOSUID 2 /* Ignore suid and sgid bits */ 66: #define MS_NODEV 4 /* Disallow access to device special files */ 67: #define MS_NOEXEC 8 /* Disallow program execution */ 68: #define MS_SYNCHRONOUS 16 /* Writes are synced at once */ 69: #define MS_REMOUNT 32 /* Alter flags of a mounted FS */ 70: #define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */ 71: #define MS_DIRSYNC 128 /* Directory modifications are synchronous */ 72: #define MS_NOATIME 1024 /* Do not update access times. */ 73: #define MS_NODIRATIME 2048 /* Do not update directory access times */ 74: #define MS_BIND 4096 75: #define MS_MOVE 8192 76: #define MS_REC 16384 77: #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. 78: MS_VERBOSE is deprecated. */ 79: #define MS_SILENT 32768 80: #define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ 81: #define MS_UNBINDABLE (1<<17) /* change to unbindable */ 82: #define MS_PRIVATE (1<<18) /* change to private */ 83: #define MS_SLAVE (1<<19) /* change to slave */ 84: #define MS_SHARED (1<<20) /* change to shared */ 85: #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ 86: #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ 87: #define MS_I_VERSION (1<<23) /* Update inode I_version field */ 88: #define MS_STRICTATIME (1<<24) /* Always perform atime updates */ 89: 90: /* These sb flags are internal to the kernel */ 91: #define MS_NOSEC (1<<28) 92: #define MS_BORN (1<<29) 93: #define MS_ACTIVE (1<<30) 94: #define MS_NOUSER (1<<31) 95: 96: /* 97: * Superblock flags that can be altered by MS_REMOUNT 98: */ 99: #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION) 100: 101: /* 102: * Old magic mount flag and mask 103: */ 104: #define MS_MGC_VAL 0xC0ED0000 105: #define MS_MGC_MSK 0xffff0000 106: 107: /* the read-only stuff doesn't really belong here, but any other place is 108: probably as bad and I don't want to create yet another include file. */ 109: 110: #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ 111: #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ 112: #define BLKRRPART _IO(0x12,95) /* re-read partition table */ 113: #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ 114: #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ 115: #define BLKRASET _IO(0x12,98) /* set read ahead for block device */ 116: #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ 117: #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ 118: #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ 119: #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ 120: #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ 121: #define BLKSSZGET _IO(0x12,104)/* get block device sector size */ 122: #if 0 123: #define BLKPG _IO(0x12,105)/* See blkpg.h */ 124: 125: /* Some people are morons. Do not use sizeof! */ 126: 127: #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ 128: #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ 129: /* This was here just to show that the number is taken - 130: probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ 131: #endif 132: /* A jump here: 108-111 have been used for various private purposes. */ 133: #define BLKBSZGET _IOR(0x12,112,size_t) 134: #define BLKBSZSET _IOW(0x12,113,size_t) 135: #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ 136: #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) 137: #define BLKTRACESTART _IO(0x12,116) 138: #define BLKTRACESTOP _IO(0x12,117) 139: #define BLKTRACETEARDOWN _IO(0x12,118) 140: #define BLKDISCARD _IO(0x12,119) 141: #define BLKIOMIN _IO(0x12,120) 142: #define BLKIOOPT _IO(0x12,121) 143: #define BLKALIGNOFF _IO(0x12,122) 144: #define BLKPBSZGET _IO(0x12,123) 145: #define BLKDISCARDZEROES _IO(0x12,124) 146: #define BLKSECDISCARD _IO(0x12,125) 147: #define BLKROTATIONAL _IO(0x12,126) 148: #define BLKZEROOUT _IO(0x12,127) 149: 150: #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ 151: #define FIBMAP _IO(0x00,1) /* bmap access */ 152: #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ 153: #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ 154: #define FITHAW _IOWR('X', 120, int) /* Thaw */ 155: #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ 156: 157: #define FS_IOC_GETFLAGS _IOR('f', 1, long) 158: #define FS_IOC_SETFLAGS _IOW('f', 2, long) 159: #define FS_IOC_GETVERSION _IOR('v', 1, long) 160: #define FS_IOC_SETVERSION _IOW('v', 2, long) 161: #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) 162: #define FS_IOC32_GETFLAGS _IOR('f', 1, int) 163: #define FS_IOC32_SETFLAGS _IOW('f', 2, int) 164: #define FS_IOC32_GETVERSION _IOR('v', 1, int) 165: #define FS_IOC32_SETVERSION _IOW('v', 2, int) 166: 167: /* 168: * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) 169: */ 170: #define FS_SECRM_FL 0x00000001 /* Secure deletion */ 171: #define FS_UNRM_FL 0x00000002 /* Undelete */ 172: #define FS_COMPR_FL 0x00000004 /* Compress file */ 173: #define FS_SYNC_FL 0x00000008 /* Synchronous updates */ 174: #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ 175: #define FS_APPEND_FL 0x00000020 /* writes to file may only append */ 176: #define FS_NODUMP_FL 0x00000040 /* do not dump file */ 177: #define FS_NOATIME_FL 0x00000080 /* do not update atime */ 178: /* Reserved for compression usage... */ 179: #define FS_DIRTY_FL 0x00000100 180: #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 181: #define FS_NOCOMP_FL 0x00000400 /* Don't compress */ 182: #define FS_ECOMPR_FL 0x00000800 /* Compression error */ 183: /* End compression flags --- maybe not all used */ 184: #define FS_BTREE_FL 0x00001000 /* btree format dir */ 185: #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ 186: #define FS_IMAGIC_FL 0x00002000 /* AFS directory */ 187: #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ 188: #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 189: #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 190: #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 191: #define FS_EXTENT_FL 0x00080000 /* Extents */ 192: #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */ 193: #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ 194: #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 195: 196: #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ 197: #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ 198: 199: 200: #define SYNC_FILE_RANGE_WAIT_BEFORE 1 201: #define SYNC_FILE_RANGE_WRITE 2 202: #define SYNC_FILE_RANGE_WAIT_AFTER 4 203: 204: #endif /* _UAPI_LINUX_FS_H */ 205: