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 */ | ||