On Ubuntu 23.04, on a clean git tree, the selftests/mm build fails due 10 or 20 missing items, all of which are found in fs.h, which is created via "make headers". However, as per [1], the idea is to stop requiring "make headers", and instead, take a snapshot of the files and check them in. Here are a few of the build errors: vm_util.c:34:21: error: variable has incomplete type 'struct pm_scan_arg' struct pm_scan_arg arg; ... vm_util.c:45:28: error: use of undeclared identifier 'PAGE_IS_WPALLOWED' ... vm_util.c:55:21: error: variable has incomplete type 'struct page_region' ... vm_util.c:105:20: error: use of undeclared identifier 'PAGE_IS_SOFT_DIRTY' To fix this, add fs.h, taken from a snapshot of ./usr/include/linux/fs.h after running "make headers". [1] commit e076eaca5906 ("selftests: break the dependency upon local header files")
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| 1 | +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | |
| 2 | +#ifndef _LINUX_FS_H | |
| 3 | +#define _LINUX_FS_H | |
| 4 | + | |
| 5 | +/* | |
| 6 | + * This file has definitions for some important file table structures | |
| 7 | + * and constants and structures used by various generic file system | |
| 8 | + * ioctl's. Please do not make any changes in this file before | |
| 9 | + * sending patches for review to linux-fsdevel@vger.kernel.org and | |
| 10 | + * linux-api@vger.kernel.org. | |
| 11 | + */ | |
| 12 | + | |
| 13 | +#include <linux/limits.h> | |
| 14 | +#include <linux/ioctl.h> | |
| 15 | +#include <linux/types.h> | |
| 16 | +#include <linux/fscrypt.h> | |
| 17 | + | |
| 18 | +/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */ | |
| 19 | +#include <linux/mount.h> | |
| 20 | + | |
| 21 | +/* | |
| 22 | + * It's silly to have NR_OPEN bigger than NR_FILE, but you can change | |
| 23 | + * the file limit at runtime and only root can increase the per-process | |
| 24 | + * nr_file rlimit, so it's safe to set up a ridiculously high absolute | |
| 25 | + * upper limit on files-per-process. | |
| 26 | + * | |
| 27 | + * Some programs (notably those using select()) may have to be | |
| 28 | + * recompiled to take full advantage of the new limits.. | |
| 29 | + */ | |
| 30 | + | |
| 31 | +/* Fixed constants first: */ | |
| 32 | +#undef NR_OPEN | |
| 33 | +#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ | |
| 34 | +#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ | |
| 35 | + | |
| 36 | +#define BLOCK_SIZE_BITS 10 | |
| 37 | +#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) | |
| 38 | + | |
| 39 | +#define SEEK_SET 0 /* seek relative to beginning of file */ | |
| 40 | +#define SEEK_CUR 1 /* seek relative to current file position */ | |
| 41 | +#define SEEK_END 2 /* seek relative to end of file */ | |
| 42 | +#define SEEK_DATA 3 /* seek to the next data */ | |
| 43 | +#define SEEK_HOLE 4 /* seek to the next hole */ | |
| 44 | +#define SEEK_MAX SEEK_HOLE | |
| 45 | + | |
| 46 | +#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ | |
| 47 | +#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ | |
| 48 | +#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ | |
| 49 | + | |
| 50 | +struct file_clone_range { | |
| 51 | + __s64 src_fd; | |
| 52 | + __u64 src_offset; | |
| 53 | + __u64 src_length; | |
| 54 | + __u64 dest_offset; | |
| 55 | +}; | |
| 56 | + | |
| 57 | +struct fstrim_range { | |
| 58 | + __u64 start; | |
| 59 | + __u64 len; | |
| 60 | + __u64 minlen; | |
| 61 | +}; | |
| 62 | + | |
| 63 | +/* | |
| 64 | + * We include a length field because some filesystems (vfat) have an identifier | |
| 65 | + * that we do want to expose as a UUID, but doesn't have the standard length. | |
| 66 | + * | |
| 67 | + * We use a fixed size buffer beacuse this interface will, by fiat, never | |
| 68 | + * support "UUIDs" longer than 16 bytes; we don't want to force all downstream | |
| 69 | + * users to have to deal with that. | |
| 70 | + */ | |
| 71 | +struct fsuuid2 { | |
| 72 | + __u8 len; | |
| 73 | + __u8 uuid[16]; | |
| 74 | +}; | |
| 75 | + | |
| 76 | +struct fs_sysfs_path { | |
| 77 | + __u8 len; | |
| 78 | + __u8 name[128]; | |
| 79 | +}; | |
| 80 | + | |
| 81 | +/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ | |
| 82 | +#define FILE_DEDUPE_RANGE_SAME 0 | |
| 83 | +#define FILE_DEDUPE_RANGE_DIFFERS 1 | |
| 84 | + | |
| 85 | +/* from struct btrfs_ioctl_file_extent_same_info */ | |
| 86 | +struct file_dedupe_range_info { | |
| 87 | + __s64 dest_fd; /* in - destination file */ | |
| 88 | + __u64 dest_offset; /* in - start of extent in destination */ | |
| 89 | + __u64 bytes_deduped; /* out - total # of bytes we were able | |
| 90 | + * to dedupe from this file. */ | |
| 91 | + /* status of this dedupe operation: | |
| 92 | + * < 0 for error | |
| 93 | + * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds | |
| 94 | + * == FILE_DEDUPE_RANGE_DIFFERS if data differs | |
| 95 | + */ | |
| 96 | + __s32 status; /* out - see above description */ | |
| 97 | + __u32 reserved; /* must be zero */ | |
| 98 | +}; | |
| 99 | + | |
| 100 | +/* from struct btrfs_ioctl_file_extent_same_args */ | |
| 101 | +struct file_dedupe_range { | |
| 102 | + __u64 src_offset; /* in - start of extent in source */ | |
| 103 | + __u64 src_length; /* in - length of extent */ | |
| 104 | + __u16 dest_count; /* in - total elements in info array */ | |
| 105 | + __u16 reserved1; /* must be zero */ | |
| 106 | + __u32 reserved2; /* must be zero */ | |
| 107 | + struct file_dedupe_range_info info[]; | |
| 108 | +}; | |
| 109 | + | |
| 110 | +/* And dynamically-tunable limits and defaults: */ | |
| 111 | +struct files_stat_struct { | |
| 112 | + unsigned long nr_files; /* read only */ | |
| 113 | + unsigned long nr_free_files; /* read only */ | |
| 114 | + unsigned long max_files; /* tunable */ | |
| 115 | +}; | |
| 116 | + | |
| 117 | +struct inodes_stat_t { | |
| 118 | + long nr_inodes; | |
| 119 | + long nr_unused; | |
| 120 | + long dummy[5]; /* padding for sysctl ABI compatibility */ | |
| 121 | +}; | |
| 122 | + | |
| 123 | + | |
| 124 | +#define NR_FILE 8192 /* this can well be larger on a larger system */ | |
| 125 | + | |
| 126 | +/* | |
| 127 | + * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR. | |
| 128 | + */ | |
| 129 | +struct fsxattr { | |
| 130 | + __u32 fsx_xflags; /* xflags field value (get/set) */ | |
| 131 | + __u32 fsx_extsize; /* extsize field value (get/set)*/ | |
| 132 | + __u32 fsx_nextents; /* nextents field value (get) */ | |
| 133 | + __u32 fsx_projid; /* project identifier (get/set) */ | |
| 134 | + __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ | |
| 135 | + unsigned char fsx_pad[8]; | |
| 136 | +}; | |
| 137 | + | |
| 138 | +/* | |
| 139 | + * Flags for the fsx_xflags field | |
| 140 | + */ | |
| 141 | +#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ | |
| 142 | +#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ | |
| 143 | +#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ | |
| 144 | +#define FS_XFLAG_APPEND 0x00000010 /* all writes append */ | |
| 145 | +#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ | |
| 146 | +#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ | |
| 147 | +#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ | |
| 148 | +#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ | |
| 149 | +#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ | |
| 150 | +#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ | |
| 151 | +#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ | |
| 152 | +#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ | |
| 153 | +#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ | |
| 154 | +#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ | |
| 155 | +#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ | |
| 156 | +#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ | |
| 157 | +#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ | |
| 158 | + | |
| 159 | +/* the read-only stuff doesn't really belong here, but any other place is | |
| 160 | + probably as bad and I don't want to create yet another include file. */ | |
| 161 | + | |
| 162 | +#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ | |
| 163 | +#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ | |
| 164 | +#define BLKRRPART _IO(0x12,95) /* re-read partition table */ | |
| 165 | +#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ | |
| 166 | +#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ | |
| 167 | +#define BLKRASET _IO(0x12,98) /* set read ahead for block device */ | |
| 168 | +#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ | |
| 169 | +#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ | |
| 170 | +#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ | |
| 171 | +#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ | |
| 172 | +#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ | |
| 173 | +#define BLKSSZGET _IO(0x12,104)/* get block device sector size */ | |
| 174 | +#if 0 | |
| 175 | +#define BLKPG _IO(0x12,105)/* See blkpg.h */ | |
| 176 | + | |
| 177 | +/* Some people are morons. Do not use sizeof! */ | |
| 178 | + | |
| 179 | +#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ | |
| 180 | +#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ | |
| 181 | +/* This was here just to show that the number is taken - | |
| 182 | + probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ | |
| 183 | +#endif | |
| 184 | +/* A jump here: 108-111 have been used for various private purposes. */ | |
| 185 | +#define BLKBSZGET _IOR(0x12,112,size_t) | |
| 186 | +#define BLKBSZSET _IOW(0x12,113,size_t) | |
| 187 | +#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ | |
| 188 | +#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) | |
| 189 | +#define BLKTRACESTART _IO(0x12,116) | |
| 190 | +#define BLKTRACESTOP _IO(0x12,117) | |
| 191 | +#define BLKTRACETEARDOWN _IO(0x12,118) | |
| 192 | +#define BLKDISCARD _IO(0x12,119) | |
| 193 | +#define BLKIOMIN _IO(0x12,120) | |
| 194 | +#define BLKIOOPT _IO(0x12,121) | |
| 195 | +#define BLKALIGNOFF _IO(0x12,122) | |
| 196 | +#define BLKPBSZGET _IO(0x12,123) | |
| 197 | +#define BLKDISCARDZEROES _IO(0x12,124) | |
| 198 | +#define BLKSECDISCARD _IO(0x12,125) | |
| 199 | +#define BLKROTATIONAL _IO(0x12,126) | |
| 200 | +#define BLKZEROOUT _IO(0x12,127) | |
| 201 | +#define BLKGETDISKSEQ _IOR(0x12,128,__u64) | |
| 202 | +/* | |
| 203 | + * A jump here: 130-136 are reserved for zoned block devices | |
| 204 | + * (see uapi/linux/blkzoned.h) | |
| 205 | + */ | |
| 206 | + | |
| 207 | +#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ | |
| 208 | +#define FIBMAP _IO(0x00,1) /* bmap access */ | |
| 209 | +#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ | |
| 210 | +#define FIFREEZE _IOWR('X', 119, int) /* Freeze */ | |
| 211 | +#define FITHAW _IOWR('X', 120, int) /* Thaw */ | |
| 212 | +#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ | |
| 213 | +#define FICLONE _IOW(0x94, 9, int) | |
| 214 | +#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) | |
| 215 | +#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range) | |
| 216 | + | |
| 217 | +#define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */ | |
| 218 | + | |
| 219 | +#define FS_IOC_GETFLAGS _IOR('f', 1, long) | |
| 220 | +#define FS_IOC_SETFLAGS _IOW('f', 2, long) | |
| 221 | +#define FS_IOC_GETVERSION _IOR('v', 1, long) | |
| 222 | +#define FS_IOC_SETVERSION _IOW('v', 2, long) | |
| 223 | +#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) | |
| 224 | +#define FS_IOC32_GETFLAGS _IOR('f', 1, int) | |
| 225 | +#define FS_IOC32_SETFLAGS _IOW('f', 2, int) | |
| 226 | +#define FS_IOC32_GETVERSION _IOR('v', 1, int) | |
| 227 | +#define FS_IOC32_SETVERSION _IOW('v', 2, int) | |
| 228 | +#define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr) | |
| 229 | +#define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr) | |
| 230 | +#define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX]) | |
| 231 | +#define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX]) | |
| 232 | +/* Returns the external filesystem UUID, the same one blkid returns */ | |
| 233 | +#define FS_IOC_GETFSUUID _IOR(0x15, 0, struct fsuuid2) | |
| 234 | +/* | |
| 235 | + * Returns the path component under /sys/fs/ that refers to this filesystem; | |
| 236 | + * also /sys/kernel/debug/ for filesystems with debugfs exports | |
| 237 | + */ | |
| 238 | +#define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path) | |
| 239 | + | |
| 240 | +/* | |
| 241 | + * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) | |
| 242 | + * | |
| 243 | + * Note: for historical reasons, these flags were originally used and | |
| 244 | + * defined for use by ext2/ext3, and then other file systems started | |
| 245 | + * using these flags so they wouldn't need to write their own version | |
| 246 | + * of chattr/lsattr (which was shipped as part of e2fsprogs). You | |
| 247 | + * should think twice before trying to use these flags in new | |
| 248 | + * contexts, or trying to assign these flags, since they are used both | |
| 249 | + * as the UAPI and the on-disk encoding for ext2/3/4. Also, we are | |
| 250 | + * almost out of 32-bit flags. :-) | |
| 251 | + * | |
| 252 | + * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from | |
| 253 | + * XFS to the generic FS level interface. This uses a structure that | |
| 254 | + * has padding and hence has more room to grow, so it may be more | |
| 255 | + * appropriate for many new use cases. | |
| 256 | + * | |
| 257 | + * Please do not change these flags or interfaces before checking with | |
| 258 | + * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org. | |
| 259 | + */ | |
| 260 | +#define FS_SECRM_FL 0x00000001 /* Secure deletion */ | |
| 261 | +#define FS_UNRM_FL 0x00000002 /* Undelete */ | |
| 262 | +#define FS_COMPR_FL 0x00000004 /* Compress file */ | |
| 263 | +#define FS_SYNC_FL 0x00000008 /* Synchronous updates */ | |
| 264 | +#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ | |
| 265 | +#define FS_APPEND_FL 0x00000020 /* writes to file may only append */ | |
| 266 | +#define FS_NODUMP_FL 0x00000040 /* do not dump file */ | |
| 267 | +#define FS_NOATIME_FL 0x00000080 /* do not update atime */ | |
| 268 | +/* Reserved for compression usage... */ | |
| 269 | +#define FS_DIRTY_FL 0x00000100 | |
| 270 | +#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ | |
| 271 | +#define FS_NOCOMP_FL 0x00000400 /* Don't compress */ | |
| 272 | +/* End compression flags --- maybe not all used */ | |
| 273 | +#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */ | |
| 274 | +#define FS_BTREE_FL 0x00001000 /* btree format dir */ | |
| 275 | +#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ | |
| 276 | +#define FS_IMAGIC_FL 0x00002000 /* AFS directory */ | |
| 277 | +#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ | |
| 278 | +#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ | |
| 279 | +#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ | |
| 280 | +#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ | |
| 281 | +#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ | |
| 282 | +#define FS_EXTENT_FL 0x00080000 /* Extents */ | |
| 283 | +#define FS_VERITY_FL 0x00100000 /* Verity protected inode */ | |
| 284 | +#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ | |
| 285 | +#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ | |
| 286 | +#define FS_NOCOW_FL 0x00800000 /* Do not cow file */ | |
| 287 | +#define FS_DAX_FL 0x02000000 /* Inode is DAX */ | |
| 288 | +#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ | |
| 289 | +#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ | |
| 290 | +#define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */ | |
| 291 | +#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ | |
| 292 | + | |
| 293 | +#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ | |
| 294 | +#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ | |
| 295 | + | |
| 296 | + | |
| 297 | +#define SYNC_FILE_RANGE_WAIT_BEFORE 1 | |
| 298 | +#define SYNC_FILE_RANGE_WRITE 2 | |
| 299 | +#define SYNC_FILE_RANGE_WAIT_AFTER 4 | |
| 300 | +#define SYNC_FILE_RANGE_WRITE_AND_WAIT (SYNC_FILE_RANGE_WRITE | \ | |
| 301 | + SYNC_FILE_RANGE_WAIT_BEFORE | \ | |
| 302 | + SYNC_FILE_RANGE_WAIT_AFTER) | |
| 303 | + | |
| 304 | +/* | |
| 305 | + * Flags for preadv2/pwritev2: | |
| 306 | + */ | |
| 307 | + | |
| 308 | +typedef int __bitwise __kernel_rwf_t; | |
| 309 | + | |
| 310 | +/* high priority request, poll if possible */ | |
| 311 | +#define RWF_HIPRI ((__kernel_rwf_t)0x00000001) | |
| 312 | + | |
| 313 | +/* per-IO O_DSYNC */ | |
| 314 | +#define RWF_DSYNC ((__kernel_rwf_t)0x00000002) | |
| 315 | + | |
| 316 | +/* per-IO O_SYNC */ | |
| 317 | +#define RWF_SYNC ((__kernel_rwf_t)0x00000004) | |
| 318 | + | |
| 319 | +/* per-IO, return -EAGAIN if operation would block */ | |
| 320 | +#define RWF_NOWAIT ((__kernel_rwf_t)0x00000008) | |
| 321 | + | |
| 322 | +/* per-IO O_APPEND */ | |
| 323 | +#define RWF_APPEND ((__kernel_rwf_t)0x00000010) | |
| 324 | + | |
| 325 | +/* per-IO negation of O_APPEND */ | |
| 326 | +#define RWF_NOAPPEND ((__kernel_rwf_t)0x00000020) | |
| 327 | + | |
| 328 | +/* mask of flags supported by the kernel */ | |
| 329 | +#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\ | |
| 330 | + RWF_APPEND | RWF_NOAPPEND) | |
| 331 | + | |
| 332 | +/* Pagemap ioctl */ | |
| 333 | +#define PAGEMAP_SCAN _IOWR('f', 16, struct pm_scan_arg) | |
| 334 | + | |
| 335 | +/* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */ | |
| 336 | +#define PAGE_IS_WPALLOWED (1 << 0) | |
| 337 | +#define PAGE_IS_WRITTEN (1 << 1) | |
| 338 | +#define PAGE_IS_FILE (1 << 2) | |
| 339 | +#define PAGE_IS_PRESENT (1 << 3) | |
| 340 | +#define PAGE_IS_SWAPPED (1 << 4) | |
| 341 | +#define PAGE_IS_PFNZERO (1 << 5) | |
| 342 | +#define PAGE_IS_HUGE (1 << 6) | |
| 343 | +#define PAGE_IS_SOFT_DIRTY (1 << 7) | |
| 344 | + | |
| 345 | +/* | |
| 346 | + * struct page_region - Page region with flags | |
| 347 | + * @start: Start of the region | |
| 348 | + * @end: End of the region (exclusive) | |
| 349 | + * @categories: PAGE_IS_* category bitmask for the region | |
| 350 | + */ | |
| 351 | +struct page_region { | |
| 352 | + __u64 start; | |
| 353 | + __u64 end; | |
| 354 | + __u64 categories; | |
| 355 | +}; | |
| 356 | + | |
| 357 | +/* Flags for PAGEMAP_SCAN ioctl */ | |
| 358 | +#define PM_SCAN_WP_MATCHING (1 << 0) /* Write protect the pages matched. */ | |
| 359 | +#define PM_SCAN_CHECK_WPASYNC (1 << 1) /* Abort the scan when a non-WP-enabled page is found. */ | |
| 360 | + | |
| 361 | +/* | |
| 362 | + * struct pm_scan_arg - Pagemap ioctl argument | |
| 363 | + * @size: Size of the structure | |
| 364 | + * @flags: Flags for the IOCTL | |
| 365 | + * @start: Starting address of the region | |
| 366 | + * @end: Ending address of the region | |
| 367 | + * @walk_end Address where the scan stopped (written by kernel). | |
| 368 | + * walk_end == end (address tags cleared) informs that the scan completed on entire range. | |
| 369 | + * @vec: Address of page_region struct array for output | |
| 370 | + * @vec_len: Length of the page_region struct array | |
| 371 | + * @max_pages: Optional limit for number of returned pages (0 = disabled) | |
| 372 | + * @category_inverted: PAGE_IS_* categories which values match if 0 instead of 1 | |
| 373 | + * @category_mask: Skip pages for which any category doesn't match | |
| 374 | + * @category_anyof_mask: Skip pages for which no category matches | |
| 375 | + * @return_mask: PAGE_IS_* categories that are to be reported in `page_region`s returned | |
| 376 | + */ | |
| 377 | +struct pm_scan_arg { | |
| 378 | + __u64 size; | |
| 379 | + __u64 flags; | |
| 380 | + __u64 start; | |
| 381 | + __u64 end; | |
| 382 | + __u64 walk_end; | |
| 383 | + __u64 vec; | |
| 384 | + __u64 vec_len; | |
| 385 | + __u64 max_pages; | |
| 386 | + __u64 category_inverted; | |
| 387 | + __u64 category_mask; | |
| 388 | + __u64 category_anyof_mask; | |
| 389 | + __u64 return_mask; | |
| 390 | +}; | |
| 391 | + | |
| 392 | +#endif /* _LINUX_FS_H */ | |