1*e2019472SJohn Hubbard /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*e2019472SJohn Hubbard #ifndef _LINUX_FS_H 3*e2019472SJohn Hubbard #define _LINUX_FS_H 4*e2019472SJohn Hubbard 5*e2019472SJohn Hubbard /* 6*e2019472SJohn Hubbard * This file has definitions for some important file table structures 7*e2019472SJohn Hubbard * and constants and structures used by various generic file system 8*e2019472SJohn Hubbard * ioctl's. Please do not make any changes in this file before 9*e2019472SJohn Hubbard * sending patches for review to linux-fsdevel@vger.kernel.org and 10*e2019472SJohn Hubbard * linux-api@vger.kernel.org. 11*e2019472SJohn Hubbard */ 12*e2019472SJohn Hubbard 13*e2019472SJohn Hubbard #include <linux/limits.h> 14*e2019472SJohn Hubbard #include <linux/ioctl.h> 15*e2019472SJohn Hubbard #include <linux/types.h> 16*e2019472SJohn Hubbard #include <linux/fscrypt.h> 17*e2019472SJohn Hubbard 18*e2019472SJohn Hubbard /* Use of MS_* flags within the kernel is restricted to core mount(2) code. */ 19*e2019472SJohn Hubbard #include <linux/mount.h> 20*e2019472SJohn Hubbard 21*e2019472SJohn Hubbard /* 22*e2019472SJohn Hubbard * It's silly to have NR_OPEN bigger than NR_FILE, but you can change 23*e2019472SJohn Hubbard * the file limit at runtime and only root can increase the per-process 24*e2019472SJohn Hubbard * nr_file rlimit, so it's safe to set up a ridiculously high absolute 25*e2019472SJohn Hubbard * upper limit on files-per-process. 26*e2019472SJohn Hubbard * 27*e2019472SJohn Hubbard * Some programs (notably those using select()) may have to be 28*e2019472SJohn Hubbard * recompiled to take full advantage of the new limits.. 29*e2019472SJohn Hubbard */ 30*e2019472SJohn Hubbard 31*e2019472SJohn Hubbard /* Fixed constants first: */ 32*e2019472SJohn Hubbard #undef NR_OPEN 33*e2019472SJohn Hubbard #define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ 34*e2019472SJohn Hubbard #define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ 35*e2019472SJohn Hubbard 36*e2019472SJohn Hubbard #define BLOCK_SIZE_BITS 10 37*e2019472SJohn Hubbard #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) 38*e2019472SJohn Hubbard 39*e2019472SJohn Hubbard #define SEEK_SET 0 /* seek relative to beginning of file */ 40*e2019472SJohn Hubbard #define SEEK_CUR 1 /* seek relative to current file position */ 41*e2019472SJohn Hubbard #define SEEK_END 2 /* seek relative to end of file */ 42*e2019472SJohn Hubbard #define SEEK_DATA 3 /* seek to the next data */ 43*e2019472SJohn Hubbard #define SEEK_HOLE 4 /* seek to the next hole */ 44*e2019472SJohn Hubbard #define SEEK_MAX SEEK_HOLE 45*e2019472SJohn Hubbard 46*e2019472SJohn Hubbard #define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ 47*e2019472SJohn Hubbard #define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ 48*e2019472SJohn Hubbard #define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ 49*e2019472SJohn Hubbard 50*e2019472SJohn Hubbard struct file_clone_range { 51*e2019472SJohn Hubbard __s64 src_fd; 52*e2019472SJohn Hubbard __u64 src_offset; 53*e2019472SJohn Hubbard __u64 src_length; 54*e2019472SJohn Hubbard __u64 dest_offset; 55*e2019472SJohn Hubbard }; 56*e2019472SJohn Hubbard 57*e2019472SJohn Hubbard struct fstrim_range { 58*e2019472SJohn Hubbard __u64 start; 59*e2019472SJohn Hubbard __u64 len; 60*e2019472SJohn Hubbard __u64 minlen; 61*e2019472SJohn Hubbard }; 62*e2019472SJohn Hubbard 63*e2019472SJohn Hubbard /* 64*e2019472SJohn Hubbard * We include a length field because some filesystems (vfat) have an identifier 65*e2019472SJohn Hubbard * that we do want to expose as a UUID, but doesn't have the standard length. 66*e2019472SJohn Hubbard * 67*e2019472SJohn Hubbard * We use a fixed size buffer beacuse this interface will, by fiat, never 68*e2019472SJohn Hubbard * support "UUIDs" longer than 16 bytes; we don't want to force all downstream 69*e2019472SJohn Hubbard * users to have to deal with that. 70*e2019472SJohn Hubbard */ 71*e2019472SJohn Hubbard struct fsuuid2 { 72*e2019472SJohn Hubbard __u8 len; 73*e2019472SJohn Hubbard __u8 uuid[16]; 74*e2019472SJohn Hubbard }; 75*e2019472SJohn Hubbard 76*e2019472SJohn Hubbard struct fs_sysfs_path { 77*e2019472SJohn Hubbard __u8 len; 78*e2019472SJohn Hubbard __u8 name[128]; 79*e2019472SJohn Hubbard }; 80*e2019472SJohn Hubbard 81*e2019472SJohn Hubbard /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ 82*e2019472SJohn Hubbard #define FILE_DEDUPE_RANGE_SAME 0 83*e2019472SJohn Hubbard #define FILE_DEDUPE_RANGE_DIFFERS 1 84*e2019472SJohn Hubbard 85*e2019472SJohn Hubbard /* from struct btrfs_ioctl_file_extent_same_info */ 86*e2019472SJohn Hubbard struct file_dedupe_range_info { 87*e2019472SJohn Hubbard __s64 dest_fd; /* in - destination file */ 88*e2019472SJohn Hubbard __u64 dest_offset; /* in - start of extent in destination */ 89*e2019472SJohn Hubbard __u64 bytes_deduped; /* out - total # of bytes we were able 90*e2019472SJohn Hubbard * to dedupe from this file. */ 91*e2019472SJohn Hubbard /* status of this dedupe operation: 92*e2019472SJohn Hubbard * < 0 for error 93*e2019472SJohn Hubbard * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds 94*e2019472SJohn Hubbard * == FILE_DEDUPE_RANGE_DIFFERS if data differs 95*e2019472SJohn Hubbard */ 96*e2019472SJohn Hubbard __s32 status; /* out - see above description */ 97*e2019472SJohn Hubbard __u32 reserved; /* must be zero */ 98*e2019472SJohn Hubbard }; 99*e2019472SJohn Hubbard 100*e2019472SJohn Hubbard /* from struct btrfs_ioctl_file_extent_same_args */ 101*e2019472SJohn Hubbard struct file_dedupe_range { 102*e2019472SJohn Hubbard __u64 src_offset; /* in - start of extent in source */ 103*e2019472SJohn Hubbard __u64 src_length; /* in - length of extent */ 104*e2019472SJohn Hubbard __u16 dest_count; /* in - total elements in info array */ 105*e2019472SJohn Hubbard __u16 reserved1; /* must be zero */ 106*e2019472SJohn Hubbard __u32 reserved2; /* must be zero */ 107*e2019472SJohn Hubbard struct file_dedupe_range_info info[]; 108*e2019472SJohn Hubbard }; 109*e2019472SJohn Hubbard 110*e2019472SJohn Hubbard /* And dynamically-tunable limits and defaults: */ 111*e2019472SJohn Hubbard struct files_stat_struct { 112*e2019472SJohn Hubbard unsigned long nr_files; /* read only */ 113*e2019472SJohn Hubbard unsigned long nr_free_files; /* read only */ 114*e2019472SJohn Hubbard unsigned long max_files; /* tunable */ 115*e2019472SJohn Hubbard }; 116*e2019472SJohn Hubbard 117*e2019472SJohn Hubbard struct inodes_stat_t { 118*e2019472SJohn Hubbard long nr_inodes; 119*e2019472SJohn Hubbard long nr_unused; 120*e2019472SJohn Hubbard long dummy[5]; /* padding for sysctl ABI compatibility */ 121*e2019472SJohn Hubbard }; 122*e2019472SJohn Hubbard 123*e2019472SJohn Hubbard 124*e2019472SJohn Hubbard #define NR_FILE 8192 /* this can well be larger on a larger system */ 125*e2019472SJohn Hubbard 126*e2019472SJohn Hubbard /* 127*e2019472SJohn Hubbard * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR. 128*e2019472SJohn Hubbard */ 129*e2019472SJohn Hubbard struct fsxattr { 130*e2019472SJohn Hubbard __u32 fsx_xflags; /* xflags field value (get/set) */ 131*e2019472SJohn Hubbard __u32 fsx_extsize; /* extsize field value (get/set)*/ 132*e2019472SJohn Hubbard __u32 fsx_nextents; /* nextents field value (get) */ 133*e2019472SJohn Hubbard __u32 fsx_projid; /* project identifier (get/set) */ 134*e2019472SJohn Hubbard __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ 135*e2019472SJohn Hubbard unsigned char fsx_pad[8]; 136*e2019472SJohn Hubbard }; 137*e2019472SJohn Hubbard 138*e2019472SJohn Hubbard /* 139*e2019472SJohn Hubbard * Flags for the fsx_xflags field 140*e2019472SJohn Hubbard */ 141*e2019472SJohn Hubbard #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ 142*e2019472SJohn Hubbard #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ 143*e2019472SJohn Hubbard #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ 144*e2019472SJohn Hubbard #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ 145*e2019472SJohn Hubbard #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ 146*e2019472SJohn Hubbard #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ 147*e2019472SJohn Hubbard #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ 148*e2019472SJohn Hubbard #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ 149*e2019472SJohn Hubbard #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ 150*e2019472SJohn Hubbard #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ 151*e2019472SJohn Hubbard #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ 152*e2019472SJohn Hubbard #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ 153*e2019472SJohn Hubbard #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ 154*e2019472SJohn Hubbard #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ 155*e2019472SJohn Hubbard #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ 156*e2019472SJohn Hubbard #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ 157*e2019472SJohn Hubbard #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ 158*e2019472SJohn Hubbard 159*e2019472SJohn Hubbard /* the read-only stuff doesn't really belong here, but any other place is 160*e2019472SJohn Hubbard probably as bad and I don't want to create yet another include file. */ 161*e2019472SJohn Hubbard 162*e2019472SJohn Hubbard #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ 163*e2019472SJohn Hubbard #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ 164*e2019472SJohn Hubbard #define BLKRRPART _IO(0x12,95) /* re-read partition table */ 165*e2019472SJohn Hubbard #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ 166*e2019472SJohn Hubbard #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ 167*e2019472SJohn Hubbard #define BLKRASET _IO(0x12,98) /* set read ahead for block device */ 168*e2019472SJohn Hubbard #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ 169*e2019472SJohn Hubbard #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ 170*e2019472SJohn Hubbard #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ 171*e2019472SJohn Hubbard #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ 172*e2019472SJohn Hubbard #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ 173*e2019472SJohn Hubbard #define BLKSSZGET _IO(0x12,104)/* get block device sector size */ 174*e2019472SJohn Hubbard #if 0 175*e2019472SJohn Hubbard #define BLKPG _IO(0x12,105)/* See blkpg.h */ 176*e2019472SJohn Hubbard 177*e2019472SJohn Hubbard /* Some people are morons. Do not use sizeof! */ 178*e2019472SJohn Hubbard 179*e2019472SJohn Hubbard #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ 180*e2019472SJohn Hubbard #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ 181*e2019472SJohn Hubbard /* This was here just to show that the number is taken - 182*e2019472SJohn Hubbard probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ 183*e2019472SJohn Hubbard #endif 184*e2019472SJohn Hubbard /* A jump here: 108-111 have been used for various private purposes. */ 185*e2019472SJohn Hubbard #define BLKBSZGET _IOR(0x12,112,size_t) 186*e2019472SJohn Hubbard #define BLKBSZSET _IOW(0x12,113,size_t) 187*e2019472SJohn Hubbard #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ 188*e2019472SJohn Hubbard #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) 189*e2019472SJohn Hubbard #define BLKTRACESTART _IO(0x12,116) 190*e2019472SJohn Hubbard #define BLKTRACESTOP _IO(0x12,117) 191*e2019472SJohn Hubbard #define BLKTRACETEARDOWN _IO(0x12,118) 192*e2019472SJohn Hubbard #define BLKDISCARD _IO(0x12,119) 193*e2019472SJohn Hubbard #define BLKIOMIN _IO(0x12,120) 194*e2019472SJohn Hubbard #define BLKIOOPT _IO(0x12,121) 195*e2019472SJohn Hubbard #define BLKALIGNOFF _IO(0x12,122) 196*e2019472SJohn Hubbard #define BLKPBSZGET _IO(0x12,123) 197*e2019472SJohn Hubbard #define BLKDISCARDZEROES _IO(0x12,124) 198*e2019472SJohn Hubbard #define BLKSECDISCARD _IO(0x12,125) 199*e2019472SJohn Hubbard #define BLKROTATIONAL _IO(0x12,126) 200*e2019472SJohn Hubbard #define BLKZEROOUT _IO(0x12,127) 201*e2019472SJohn Hubbard #define BLKGETDISKSEQ _IOR(0x12,128,__u64) 202*e2019472SJohn Hubbard /* 203*e2019472SJohn Hubbard * A jump here: 130-136 are reserved for zoned block devices 204*e2019472SJohn Hubbard * (see uapi/linux/blkzoned.h) 205*e2019472SJohn Hubbard */ 206*e2019472SJohn Hubbard 207*e2019472SJohn Hubbard #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ 208*e2019472SJohn Hubbard #define FIBMAP _IO(0x00,1) /* bmap access */ 209*e2019472SJohn Hubbard #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ 210*e2019472SJohn Hubbard #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ 211*e2019472SJohn Hubbard #define FITHAW _IOWR('X', 120, int) /* Thaw */ 212*e2019472SJohn Hubbard #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ 213*e2019472SJohn Hubbard #define FICLONE _IOW(0x94, 9, int) 214*e2019472SJohn Hubbard #define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) 215*e2019472SJohn Hubbard #define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range) 216*e2019472SJohn Hubbard 217*e2019472SJohn Hubbard #define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */ 218*e2019472SJohn Hubbard 219*e2019472SJohn Hubbard #define FS_IOC_GETFLAGS _IOR('f', 1, long) 220*e2019472SJohn Hubbard #define FS_IOC_SETFLAGS _IOW('f', 2, long) 221*e2019472SJohn Hubbard #define FS_IOC_GETVERSION _IOR('v', 1, long) 222*e2019472SJohn Hubbard #define FS_IOC_SETVERSION _IOW('v', 2, long) 223*e2019472SJohn Hubbard #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) 224*e2019472SJohn Hubbard #define FS_IOC32_GETFLAGS _IOR('f', 1, int) 225*e2019472SJohn Hubbard #define FS_IOC32_SETFLAGS _IOW('f', 2, int) 226*e2019472SJohn Hubbard #define FS_IOC32_GETVERSION _IOR('v', 1, int) 227*e2019472SJohn Hubbard #define FS_IOC32_SETVERSION _IOW('v', 2, int) 228*e2019472SJohn Hubbard #define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr) 229*e2019472SJohn Hubbard #define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr) 230*e2019472SJohn Hubbard #define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX]) 231*e2019472SJohn Hubbard #define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX]) 232*e2019472SJohn Hubbard /* Returns the external filesystem UUID, the same one blkid returns */ 233*e2019472SJohn Hubbard #define FS_IOC_GETFSUUID _IOR(0x15, 0, struct fsuuid2) 234*e2019472SJohn Hubbard /* 235*e2019472SJohn Hubbard * Returns the path component under /sys/fs/ that refers to this filesystem; 236*e2019472SJohn Hubbard * also /sys/kernel/debug/ for filesystems with debugfs exports 237*e2019472SJohn Hubbard */ 238*e2019472SJohn Hubbard #define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path) 239*e2019472SJohn Hubbard 240*e2019472SJohn Hubbard /* 241*e2019472SJohn Hubbard * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) 242*e2019472SJohn Hubbard * 243*e2019472SJohn Hubbard * Note: for historical reasons, these flags were originally used and 244*e2019472SJohn Hubbard * defined for use by ext2/ext3, and then other file systems started 245*e2019472SJohn Hubbard * using these flags so they wouldn't need to write their own version 246*e2019472SJohn Hubbard * of chattr/lsattr (which was shipped as part of e2fsprogs). You 247*e2019472SJohn Hubbard * should think twice before trying to use these flags in new 248*e2019472SJohn Hubbard * contexts, or trying to assign these flags, since they are used both 249*e2019472SJohn Hubbard * as the UAPI and the on-disk encoding for ext2/3/4. Also, we are 250*e2019472SJohn Hubbard * almost out of 32-bit flags. :-) 251*e2019472SJohn Hubbard * 252*e2019472SJohn Hubbard * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from 253*e2019472SJohn Hubbard * XFS to the generic FS level interface. This uses a structure that 254*e2019472SJohn Hubbard * has padding and hence has more room to grow, so it may be more 255*e2019472SJohn Hubbard * appropriate for many new use cases. 256*e2019472SJohn Hubbard * 257*e2019472SJohn Hubbard * Please do not change these flags or interfaces before checking with 258*e2019472SJohn Hubbard * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org. 259*e2019472SJohn Hubbard */ 260*e2019472SJohn Hubbard #define FS_SECRM_FL 0x00000001 /* Secure deletion */ 261*e2019472SJohn Hubbard #define FS_UNRM_FL 0x00000002 /* Undelete */ 262*e2019472SJohn Hubbard #define FS_COMPR_FL 0x00000004 /* Compress file */ 263*e2019472SJohn Hubbard #define FS_SYNC_FL 0x00000008 /* Synchronous updates */ 264*e2019472SJohn Hubbard #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ 265*e2019472SJohn Hubbard #define FS_APPEND_FL 0x00000020 /* writes to file may only append */ 266*e2019472SJohn Hubbard #define FS_NODUMP_FL 0x00000040 /* do not dump file */ 267*e2019472SJohn Hubbard #define FS_NOATIME_FL 0x00000080 /* do not update atime */ 268*e2019472SJohn Hubbard /* Reserved for compression usage... */ 269*e2019472SJohn Hubbard #define FS_DIRTY_FL 0x00000100 270*e2019472SJohn Hubbard #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 271*e2019472SJohn Hubbard #define FS_NOCOMP_FL 0x00000400 /* Don't compress */ 272*e2019472SJohn Hubbard /* End compression flags --- maybe not all used */ 273*e2019472SJohn Hubbard #define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */ 274*e2019472SJohn Hubbard #define FS_BTREE_FL 0x00001000 /* btree format dir */ 275*e2019472SJohn Hubbard #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ 276*e2019472SJohn Hubbard #define FS_IMAGIC_FL 0x00002000 /* AFS directory */ 277*e2019472SJohn Hubbard #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ 278*e2019472SJohn Hubbard #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 279*e2019472SJohn Hubbard #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 280*e2019472SJohn Hubbard #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 281*e2019472SJohn Hubbard #define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ 282*e2019472SJohn Hubbard #define FS_EXTENT_FL 0x00080000 /* Extents */ 283*e2019472SJohn Hubbard #define FS_VERITY_FL 0x00100000 /* Verity protected inode */ 284*e2019472SJohn Hubbard #define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 285*e2019472SJohn Hubbard #define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ 286*e2019472SJohn Hubbard #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ 287*e2019472SJohn Hubbard #define FS_DAX_FL 0x02000000 /* Inode is DAX */ 288*e2019472SJohn Hubbard #define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ 289*e2019472SJohn Hubbard #define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 290*e2019472SJohn Hubbard #define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */ 291*e2019472SJohn Hubbard #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 292*e2019472SJohn Hubbard 293*e2019472SJohn Hubbard #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ 294*e2019472SJohn Hubbard #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ 295*e2019472SJohn Hubbard 296*e2019472SJohn Hubbard 297*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WAIT_BEFORE 1 298*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WRITE 2 299*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WAIT_AFTER 4 300*e2019472SJohn Hubbard #define SYNC_FILE_RANGE_WRITE_AND_WAIT (SYNC_FILE_RANGE_WRITE | \ 301*e2019472SJohn Hubbard SYNC_FILE_RANGE_WAIT_BEFORE | \ 302*e2019472SJohn Hubbard SYNC_FILE_RANGE_WAIT_AFTER) 303*e2019472SJohn Hubbard 304*e2019472SJohn Hubbard /* 305*e2019472SJohn Hubbard * Flags for preadv2/pwritev2: 306*e2019472SJohn Hubbard */ 307*e2019472SJohn Hubbard 308*e2019472SJohn Hubbard typedef int __bitwise __kernel_rwf_t; 309*e2019472SJohn Hubbard 310*e2019472SJohn Hubbard /* high priority request, poll if possible */ 311*e2019472SJohn Hubbard #define RWF_HIPRI ((__kernel_rwf_t)0x00000001) 312*e2019472SJohn Hubbard 313*e2019472SJohn Hubbard /* per-IO O_DSYNC */ 314*e2019472SJohn Hubbard #define RWF_DSYNC ((__kernel_rwf_t)0x00000002) 315*e2019472SJohn Hubbard 316*e2019472SJohn Hubbard /* per-IO O_SYNC */ 317*e2019472SJohn Hubbard #define RWF_SYNC ((__kernel_rwf_t)0x00000004) 318*e2019472SJohn Hubbard 319*e2019472SJohn Hubbard /* per-IO, return -EAGAIN if operation would block */ 320*e2019472SJohn Hubbard #define RWF_NOWAIT ((__kernel_rwf_t)0x00000008) 321*e2019472SJohn Hubbard 322*e2019472SJohn Hubbard /* per-IO O_APPEND */ 323*e2019472SJohn Hubbard #define RWF_APPEND ((__kernel_rwf_t)0x00000010) 324*e2019472SJohn Hubbard 325*e2019472SJohn Hubbard /* per-IO negation of O_APPEND */ 326*e2019472SJohn Hubbard #define RWF_NOAPPEND ((__kernel_rwf_t)0x00000020) 327*e2019472SJohn Hubbard 328*e2019472SJohn Hubbard /* mask of flags supported by the kernel */ 329*e2019472SJohn Hubbard #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\ 330*e2019472SJohn Hubbard RWF_APPEND | RWF_NOAPPEND) 331*e2019472SJohn Hubbard 332*e2019472SJohn Hubbard /* Pagemap ioctl */ 333*e2019472SJohn Hubbard #define PAGEMAP_SCAN _IOWR('f', 16, struct pm_scan_arg) 334*e2019472SJohn Hubbard 335*e2019472SJohn Hubbard /* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */ 336*e2019472SJohn Hubbard #define PAGE_IS_WPALLOWED (1 << 0) 337*e2019472SJohn Hubbard #define PAGE_IS_WRITTEN (1 << 1) 338*e2019472SJohn Hubbard #define PAGE_IS_FILE (1 << 2) 339*e2019472SJohn Hubbard #define PAGE_IS_PRESENT (1 << 3) 340*e2019472SJohn Hubbard #define PAGE_IS_SWAPPED (1 << 4) 341*e2019472SJohn Hubbard #define PAGE_IS_PFNZERO (1 << 5) 342*e2019472SJohn Hubbard #define PAGE_IS_HUGE (1 << 6) 343*e2019472SJohn Hubbard #define PAGE_IS_SOFT_DIRTY (1 << 7) 344*e2019472SJohn Hubbard 345*e2019472SJohn Hubbard /* 346*e2019472SJohn Hubbard * struct page_region - Page region with flags 347*e2019472SJohn Hubbard * @start: Start of the region 348*e2019472SJohn Hubbard * @end: End of the region (exclusive) 349*e2019472SJohn Hubbard * @categories: PAGE_IS_* category bitmask for the region 350*e2019472SJohn Hubbard */ 351*e2019472SJohn Hubbard struct page_region { 352*e2019472SJohn Hubbard __u64 start; 353*e2019472SJohn Hubbard __u64 end; 354*e2019472SJohn Hubbard __u64 categories; 355*e2019472SJohn Hubbard }; 356*e2019472SJohn Hubbard 357*e2019472SJohn Hubbard /* Flags for PAGEMAP_SCAN ioctl */ 358*e2019472SJohn Hubbard #define PM_SCAN_WP_MATCHING (1 << 0) /* Write protect the pages matched. */ 359*e2019472SJohn Hubbard #define PM_SCAN_CHECK_WPASYNC (1 << 1) /* Abort the scan when a non-WP-enabled page is found. */ 360*e2019472SJohn Hubbard 361*e2019472SJohn Hubbard /* 362*e2019472SJohn Hubbard * struct pm_scan_arg - Pagemap ioctl argument 363*e2019472SJohn Hubbard * @size: Size of the structure 364*e2019472SJohn Hubbard * @flags: Flags for the IOCTL 365*e2019472SJohn Hubbard * @start: Starting address of the region 366*e2019472SJohn Hubbard * @end: Ending address of the region 367*e2019472SJohn Hubbard * @walk_end Address where the scan stopped (written by kernel). 368*e2019472SJohn Hubbard * walk_end == end (address tags cleared) informs that the scan completed on entire range. 369*e2019472SJohn Hubbard * @vec: Address of page_region struct array for output 370*e2019472SJohn Hubbard * @vec_len: Length of the page_region struct array 371*e2019472SJohn Hubbard * @max_pages: Optional limit for number of returned pages (0 = disabled) 372*e2019472SJohn Hubbard * @category_inverted: PAGE_IS_* categories which values match if 0 instead of 1 373*e2019472SJohn Hubbard * @category_mask: Skip pages for which any category doesn't match 374*e2019472SJohn Hubbard * @category_anyof_mask: Skip pages for which no category matches 375*e2019472SJohn Hubbard * @return_mask: PAGE_IS_* categories that are to be reported in `page_region`s returned 376*e2019472SJohn Hubbard */ 377*e2019472SJohn Hubbard struct pm_scan_arg { 378*e2019472SJohn Hubbard __u64 size; 379*e2019472SJohn Hubbard __u64 flags; 380*e2019472SJohn Hubbard __u64 start; 381*e2019472SJohn Hubbard __u64 end; 382*e2019472SJohn Hubbard __u64 walk_end; 383*e2019472SJohn Hubbard __u64 vec; 384*e2019472SJohn Hubbard __u64 vec_len; 385*e2019472SJohn Hubbard __u64 max_pages; 386*e2019472SJohn Hubbard __u64 category_inverted; 387*e2019472SJohn Hubbard __u64 category_mask; 388*e2019472SJohn Hubbard __u64 category_anyof_mask; 389*e2019472SJohn Hubbard __u64 return_mask; 390*e2019472SJohn Hubbard }; 391*e2019472SJohn Hubbard 392*e2019472SJohn Hubbard #endif /* _LINUX_FS_H */ 393