1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _UAPI_LINUX_FS_H 3 #define _UAPI_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 [email protected] and 10 * [email protected]. 11 */ 12 13 #include <linux/limits.h> 14 #include <linux/ioctl.h> 15 #include <linux/types.h> 16 #ifndef __KERNEL__ 17 #include <linux/fscrypt.h> 18 #endif 19 20 /* Use of MS_* flags within the kernel is restricted to core mount(2) code. */ 21 #if !defined(__KERNEL__) 22 #include <linux/mount.h> 23 #endif 24 25 /* 26 * It's silly to have NR_OPEN bigger than NR_FILE, but you can change 27 * the file limit at runtime and only root can increase the per-process 28 * nr_file rlimit, so it's safe to set up a ridiculously high absolute 29 * upper limit on files-per-process. 30 * 31 * Some programs (notably those using select()) may have to be 32 * recompiled to take full advantage of the new limits.. 33 */ 34 35 /* Fixed constants first: */ 36 #undef NR_OPEN 37 #define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ 38 #define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ 39 40 #define BLOCK_SIZE_BITS 10 41 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) 42 43 /* flags for integrity meta */ 44 #define IO_INTEGRITY_CHK_GUARD (1U << 0) /* enforce guard check */ 45 #define IO_INTEGRITY_CHK_REFTAG (1U << 1) /* enforce ref check */ 46 #define IO_INTEGRITY_CHK_APPTAG (1U << 2) /* enforce app check */ 47 48 #define IO_INTEGRITY_VALID_FLAGS (IO_INTEGRITY_CHK_GUARD | \ 49 IO_INTEGRITY_CHK_REFTAG | \ 50 IO_INTEGRITY_CHK_APPTAG) 51 52 #define SEEK_SET 0 /* seek relative to beginning of file */ 53 #define SEEK_CUR 1 /* seek relative to current file position */ 54 #define SEEK_END 2 /* seek relative to end of file */ 55 #define SEEK_DATA 3 /* seek to the next data */ 56 #define SEEK_HOLE 4 /* seek to the next hole */ 57 #define SEEK_MAX SEEK_HOLE 58 59 #define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ 60 #define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ 61 #define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ 62 63 struct file_clone_range { 64 __s64 src_fd; 65 __u64 src_offset; 66 __u64 src_length; 67 __u64 dest_offset; 68 }; 69 70 struct fstrim_range { 71 __u64 start; 72 __u64 len; 73 __u64 minlen; 74 }; 75 76 /* 77 * We include a length field because some filesystems (vfat) have an identifier 78 * that we do want to expose as a UUID, but doesn't have the standard length. 79 * 80 * We use a fixed size buffer beacuse this interface will, by fiat, never 81 * support "UUIDs" longer than 16 bytes; we don't want to force all downstream 82 * users to have to deal with that. 83 */ 84 struct fsuuid2 { 85 __u8 len; 86 __u8 uuid[16]; 87 }; 88 89 struct fs_sysfs_path { 90 __u8 len; 91 __u8 name[128]; 92 }; 93 94 /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ 95 #define FILE_DEDUPE_RANGE_SAME 0 96 #define FILE_DEDUPE_RANGE_DIFFERS 1 97 98 /* from struct btrfs_ioctl_file_extent_same_info */ 99 struct file_dedupe_range_info { 100 __s64 dest_fd; /* in - destination file */ 101 __u64 dest_offset; /* in - start of extent in destination */ 102 __u64 bytes_deduped; /* out - total # of bytes we were able 103 * to dedupe from this file. */ 104 /* status of this dedupe operation: 105 * < 0 for error 106 * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds 107 * == FILE_DEDUPE_RANGE_DIFFERS if data differs 108 */ 109 __s32 status; /* out - see above description */ 110 __u32 reserved; /* must be zero */ 111 }; 112 113 /* from struct btrfs_ioctl_file_extent_same_args */ 114 struct file_dedupe_range { 115 __u64 src_offset; /* in - start of extent in source */ 116 __u64 src_length; /* in - length of extent */ 117 __u16 dest_count; /* in - total elements in info array */ 118 __u16 reserved1; /* must be zero */ 119 __u32 reserved2; /* must be zero */ 120 struct file_dedupe_range_info info[]; 121 }; 122 123 /* And dynamically-tunable limits and defaults: */ 124 struct files_stat_struct { 125 unsigned long nr_files; /* read only */ 126 unsigned long nr_free_files; /* read only */ 127 unsigned long max_files; /* tunable */ 128 }; 129 130 struct inodes_stat_t { 131 long nr_inodes; 132 long nr_unused; 133 long dummy[5]; /* padding for sysctl ABI compatibility */ 134 }; 135 136 137 #define NR_FILE 8192 /* this can well be larger on a larger system */ 138 139 /* 140 * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR. 141 */ 142 struct fsxattr { 143 __u32 fsx_xflags; /* xflags field value (get/set) */ 144 __u32 fsx_extsize; /* extsize field value (get/set)*/ 145 __u32 fsx_nextents; /* nextents field value (get) */ 146 __u32 fsx_projid; /* project identifier (get/set) */ 147 __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ 148 unsigned char fsx_pad[8]; 149 }; 150 151 /* 152 * Flags for the fsx_xflags field 153 */ 154 #define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ 155 #define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ 156 #define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ 157 #define FS_XFLAG_APPEND 0x00000010 /* all writes append */ 158 #define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ 159 #define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */ 160 #define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ 161 #define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ 162 #define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ 163 #define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ 164 #define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ 165 #define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ 166 #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ 167 #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ 168 #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ 169 #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ 170 #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ 171 172 /* the read-only stuff doesn't really belong here, but any other place is 173 probably as bad and I don't want to create yet another include file. */ 174 175 #define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */ 176 #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ 177 #define BLKRRPART _IO(0x12,95) /* re-read partition table */ 178 #define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */ 179 #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ 180 #define BLKRASET _IO(0x12,98) /* set read ahead for block device */ 181 #define BLKRAGET _IO(0x12,99) /* get current read ahead setting */ 182 #define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */ 183 #define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */ 184 #define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */ 185 #define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */ 186 #define BLKSSZGET _IO(0x12,104)/* get block device sector size */ 187 #if 0 188 #define BLKPG _IO(0x12,105)/* See blkpg.h */ 189 190 /* Some people are morons. Do not use sizeof! */ 191 192 #define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */ 193 #define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */ 194 /* This was here just to show that the number is taken - 195 probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */ 196 #endif 197 /* A jump here: 108-111 have been used for various private purposes. */ 198 #define BLKBSZGET _IOR(0x12,112,size_t) 199 #define BLKBSZSET _IOW(0x12,113,size_t) 200 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ 201 #define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup) 202 #define BLKTRACESTART _IO(0x12,116) 203 #define BLKTRACESTOP _IO(0x12,117) 204 #define BLKTRACETEARDOWN _IO(0x12,118) 205 #define BLKDISCARD _IO(0x12,119) 206 #define BLKIOMIN _IO(0x12,120) 207 #define BLKIOOPT _IO(0x12,121) 208 #define BLKALIGNOFF _IO(0x12,122) 209 #define BLKPBSZGET _IO(0x12,123) 210 #define BLKDISCARDZEROES _IO(0x12,124) 211 #define BLKSECDISCARD _IO(0x12,125) 212 #define BLKROTATIONAL _IO(0x12,126) 213 #define BLKZEROOUT _IO(0x12,127) 214 #define BLKGETDISKSEQ _IOR(0x12,128,__u64) 215 /* 216 * A jump here: 130-136 are reserved for zoned block devices 217 * (see uapi/linux/blkzoned.h) 218 */ 219 220 #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */ 221 #define FIBMAP _IO(0x00,1) /* bmap access */ 222 #define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */ 223 #define FIFREEZE _IOWR('X', 119, int) /* Freeze */ 224 #define FITHAW _IOWR('X', 120, int) /* Thaw */ 225 #define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */ 226 #define FICLONE _IOW(0x94, 9, int) 227 #define FICLONERANGE _IOW(0x94, 13, struct file_clone_range) 228 #define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range) 229 230 #define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */ 231 232 #define FS_IOC_GETFLAGS _IOR('f', 1, long) 233 #define FS_IOC_SETFLAGS _IOW('f', 2, long) 234 #define FS_IOC_GETVERSION _IOR('v', 1, long) 235 #define FS_IOC_SETVERSION _IOW('v', 2, long) 236 #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) 237 #define FS_IOC32_GETFLAGS _IOR('f', 1, int) 238 #define FS_IOC32_SETFLAGS _IOW('f', 2, int) 239 #define FS_IOC32_GETVERSION _IOR('v', 1, int) 240 #define FS_IOC32_SETVERSION _IOW('v', 2, int) 241 #define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr) 242 #define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr) 243 #define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX]) 244 #define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX]) 245 /* Returns the external filesystem UUID, the same one blkid returns */ 246 #define FS_IOC_GETFSUUID _IOR(0x15, 0, struct fsuuid2) 247 /* 248 * Returns the path component under /sys/fs/ that refers to this filesystem; 249 * also /sys/kernel/debug/ for filesystems with debugfs exports 250 */ 251 #define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path) 252 253 /* 254 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS) 255 * 256 * Note: for historical reasons, these flags were originally used and 257 * defined for use by ext2/ext3, and then other file systems started 258 * using these flags so they wouldn't need to write their own version 259 * of chattr/lsattr (which was shipped as part of e2fsprogs). You 260 * should think twice before trying to use these flags in new 261 * contexts, or trying to assign these flags, since they are used both 262 * as the UAPI and the on-disk encoding for ext2/3/4. Also, we are 263 * almost out of 32-bit flags. :-) 264 * 265 * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from 266 * XFS to the generic FS level interface. This uses a structure that 267 * has padding and hence has more room to grow, so it may be more 268 * appropriate for many new use cases. 269 * 270 * Please do not change these flags or interfaces before checking with 271 * [email protected] and [email protected]. 272 */ 273 #define FS_SECRM_FL 0x00000001 /* Secure deletion */ 274 #define FS_UNRM_FL 0x00000002 /* Undelete */ 275 #define FS_COMPR_FL 0x00000004 /* Compress file */ 276 #define FS_SYNC_FL 0x00000008 /* Synchronous updates */ 277 #define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */ 278 #define FS_APPEND_FL 0x00000020 /* writes to file may only append */ 279 #define FS_NODUMP_FL 0x00000040 /* do not dump file */ 280 #define FS_NOATIME_FL 0x00000080 /* do not update atime */ 281 /* Reserved for compression usage... */ 282 #define FS_DIRTY_FL 0x00000100 283 #define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ 284 #define FS_NOCOMP_FL 0x00000400 /* Don't compress */ 285 /* End compression flags --- maybe not all used */ 286 #define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */ 287 #define FS_BTREE_FL 0x00001000 /* btree format dir */ 288 #define FS_INDEX_FL 0x00001000 /* hash-indexed directory */ 289 #define FS_IMAGIC_FL 0x00002000 /* AFS directory */ 290 #define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */ 291 #define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */ 292 #define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */ 293 #define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ 294 #define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ 295 #define FS_EXTENT_FL 0x00080000 /* Extents */ 296 #define FS_VERITY_FL 0x00100000 /* Verity protected inode */ 297 #define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ 298 #define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ 299 #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ 300 #define FS_DAX_FL 0x02000000 /* Inode is DAX */ 301 #define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ 302 #define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ 303 #define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */ 304 #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ 305 306 #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ 307 #define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */ 308 309 310 #define SYNC_FILE_RANGE_WAIT_BEFORE 1 311 #define SYNC_FILE_RANGE_WRITE 2 312 #define SYNC_FILE_RANGE_WAIT_AFTER 4 313 #define SYNC_FILE_RANGE_WRITE_AND_WAIT (SYNC_FILE_RANGE_WRITE | \ 314 SYNC_FILE_RANGE_WAIT_BEFORE | \ 315 SYNC_FILE_RANGE_WAIT_AFTER) 316 317 /* 318 * Flags for preadv2/pwritev2: 319 */ 320 321 typedef int __bitwise __kernel_rwf_t; 322 323 /* high priority request, poll if possible */ 324 #define RWF_HIPRI ((__force __kernel_rwf_t)0x00000001) 325 326 /* per-IO O_DSYNC */ 327 #define RWF_DSYNC ((__force __kernel_rwf_t)0x00000002) 328 329 /* per-IO O_SYNC */ 330 #define RWF_SYNC ((__force __kernel_rwf_t)0x00000004) 331 332 /* per-IO, return -EAGAIN if operation would block */ 333 #define RWF_NOWAIT ((__force __kernel_rwf_t)0x00000008) 334 335 /* per-IO O_APPEND */ 336 #define RWF_APPEND ((__force __kernel_rwf_t)0x00000010) 337 338 /* per-IO negation of O_APPEND */ 339 #define RWF_NOAPPEND ((__force __kernel_rwf_t)0x00000020) 340 341 /* Atomic Write */ 342 #define RWF_ATOMIC ((__force __kernel_rwf_t)0x00000040) 343 344 /* mask of flags supported by the kernel */ 345 #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\ 346 RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC) 347 348 #define PROCFS_IOCTL_MAGIC 'f' 349 350 /* Pagemap ioctl */ 351 #define PAGEMAP_SCAN _IOWR(PROCFS_IOCTL_MAGIC, 16, struct pm_scan_arg) 352 353 /* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */ 354 #define PAGE_IS_WPALLOWED (1 << 0) 355 #define PAGE_IS_WRITTEN (1 << 1) 356 #define PAGE_IS_FILE (1 << 2) 357 #define PAGE_IS_PRESENT (1 << 3) 358 #define PAGE_IS_SWAPPED (1 << 4) 359 #define PAGE_IS_PFNZERO (1 << 5) 360 #define PAGE_IS_HUGE (1 << 6) 361 #define PAGE_IS_SOFT_DIRTY (1 << 7) 362 363 /* 364 * struct page_region - Page region with flags 365 * @start: Start of the region 366 * @end: End of the region (exclusive) 367 * @categories: PAGE_IS_* category bitmask for the region 368 */ 369 struct page_region { 370 __u64 start; 371 __u64 end; 372 __u64 categories; 373 }; 374 375 /* Flags for PAGEMAP_SCAN ioctl */ 376 #define PM_SCAN_WP_MATCHING (1 << 0) /* Write protect the pages matched. */ 377 #define PM_SCAN_CHECK_WPASYNC (1 << 1) /* Abort the scan when a non-WP-enabled page is found. */ 378 379 /* 380 * struct pm_scan_arg - Pagemap ioctl argument 381 * @size: Size of the structure 382 * @flags: Flags for the IOCTL 383 * @start: Starting address of the region 384 * @end: Ending address of the region 385 * @walk_end Address where the scan stopped (written by kernel). 386 * walk_end == end (address tags cleared) informs that the scan completed on entire range. 387 * @vec: Address of page_region struct array for output 388 * @vec_len: Length of the page_region struct array 389 * @max_pages: Optional limit for number of returned pages (0 = disabled) 390 * @category_inverted: PAGE_IS_* categories which values match if 0 instead of 1 391 * @category_mask: Skip pages for which any category doesn't match 392 * @category_anyof_mask: Skip pages for which no category matches 393 * @return_mask: PAGE_IS_* categories that are to be reported in `page_region`s returned 394 */ 395 struct pm_scan_arg { 396 __u64 size; 397 __u64 flags; 398 __u64 start; 399 __u64 end; 400 __u64 walk_end; 401 __u64 vec; 402 __u64 vec_len; 403 __u64 max_pages; 404 __u64 category_inverted; 405 __u64 category_mask; 406 __u64 category_anyof_mask; 407 __u64 return_mask; 408 }; 409 410 /* /proc/<pid>/maps ioctl */ 411 #define PROCMAP_QUERY _IOWR(PROCFS_IOCTL_MAGIC, 17, struct procmap_query) 412 413 enum procmap_query_flags { 414 /* 415 * VMA permission flags. 416 * 417 * Can be used as part of procmap_query.query_flags field to look up 418 * only VMAs satisfying specified subset of permissions. E.g., specifying 419 * PROCMAP_QUERY_VMA_READABLE only will return both readable and read/write VMAs, 420 * while having PROCMAP_QUERY_VMA_READABLE | PROCMAP_QUERY_VMA_WRITABLE will only 421 * return read/write VMAs, though both executable/non-executable and 422 * private/shared will be ignored. 423 * 424 * PROCMAP_QUERY_VMA_* flags are also returned in procmap_query.vma_flags 425 * field to specify actual VMA permissions. 426 */ 427 PROCMAP_QUERY_VMA_READABLE = 0x01, 428 PROCMAP_QUERY_VMA_WRITABLE = 0x02, 429 PROCMAP_QUERY_VMA_EXECUTABLE = 0x04, 430 PROCMAP_QUERY_VMA_SHARED = 0x08, 431 /* 432 * Query modifier flags. 433 * 434 * By default VMA that covers provided address is returned, or -ENOENT 435 * is returned. With PROCMAP_QUERY_COVERING_OR_NEXT_VMA flag set, closest 436 * VMA with vma_start > addr will be returned if no covering VMA is 437 * found. 438 * 439 * PROCMAP_QUERY_FILE_BACKED_VMA instructs query to consider only VMAs that 440 * have file backing. Can be combined with PROCMAP_QUERY_COVERING_OR_NEXT_VMA 441 * to iterate all VMAs with file backing. 442 */ 443 PROCMAP_QUERY_COVERING_OR_NEXT_VMA = 0x10, 444 PROCMAP_QUERY_FILE_BACKED_VMA = 0x20, 445 }; 446 447 /* 448 * Input/output argument structured passed into ioctl() call. It can be used 449 * to query a set of VMAs (Virtual Memory Areas) of a process. 450 * 451 * Each field can be one of three kinds, marked in a short comment to the 452 * right of the field: 453 * - "in", input argument, user has to provide this value, kernel doesn't modify it; 454 * - "out", output argument, kernel sets this field with VMA data; 455 * - "in/out", input and output argument; user provides initial value (used 456 * to specify maximum allowable buffer size), and kernel sets it to actual 457 * amount of data written (or zero, if there is no data). 458 * 459 * If matching VMA is found (according to criterias specified by 460 * query_addr/query_flags, all the out fields are filled out, and ioctl() 461 * returns 0. If there is no matching VMA, -ENOENT will be returned. 462 * In case of any other error, negative error code other than -ENOENT is 463 * returned. 464 * 465 * Most of the data is similar to the one returned as text in /proc/<pid>/maps 466 * file, but procmap_query provides more querying flexibility. There are no 467 * consistency guarantees between subsequent ioctl() calls, but data returned 468 * for matched VMA is self-consistent. 469 */ 470 struct procmap_query { 471 /* Query struct size, for backwards/forward compatibility */ 472 __u64 size; 473 /* 474 * Query flags, a combination of enum procmap_query_flags values. 475 * Defines query filtering and behavior, see enum procmap_query_flags. 476 * 477 * Input argument, provided by user. Kernel doesn't modify it. 478 */ 479 __u64 query_flags; /* in */ 480 /* 481 * Query address. By default, VMA that covers this address will 482 * be looked up. PROCMAP_QUERY_* flags above modify this default 483 * behavior further. 484 * 485 * Input argument, provided by user. Kernel doesn't modify it. 486 */ 487 __u64 query_addr; /* in */ 488 /* VMA starting (inclusive) and ending (exclusive) address, if VMA is found. */ 489 __u64 vma_start; /* out */ 490 __u64 vma_end; /* out */ 491 /* VMA permissions flags. A combination of PROCMAP_QUERY_VMA_* flags. */ 492 __u64 vma_flags; /* out */ 493 /* VMA backing page size granularity. */ 494 __u64 vma_page_size; /* out */ 495 /* 496 * VMA file offset. If VMA has file backing, this specifies offset 497 * within the file that VMA's start address corresponds to. 498 * Is set to zero if VMA has no backing file. 499 */ 500 __u64 vma_offset; /* out */ 501 /* Backing file's inode number, or zero, if VMA has no backing file. */ 502 __u64 inode; /* out */ 503 /* Backing file's device major/minor number, or zero, if VMA has no backing file. */ 504 __u32 dev_major; /* out */ 505 __u32 dev_minor; /* out */ 506 /* 507 * If set to non-zero value, signals the request to return VMA name 508 * (i.e., VMA's backing file's absolute path, with " (deleted)" suffix 509 * appended, if file was unlinked from FS) for matched VMA. VMA name 510 * can also be some special name (e.g., "[heap]", "[stack]") or could 511 * be even user-supplied with prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME). 512 * 513 * Kernel will set this field to zero, if VMA has no associated name. 514 * Otherwise kernel will return actual amount of bytes filled in 515 * user-supplied buffer (see vma_name_addr field below), including the 516 * terminating zero. 517 * 518 * If VMA name is longer that user-supplied maximum buffer size, 519 * -E2BIG error is returned. 520 * 521 * If this field is set to non-zero value, vma_name_addr should point 522 * to valid user space memory buffer of at least vma_name_size bytes. 523 * If set to zero, vma_name_addr should be set to zero as well 524 */ 525 __u32 vma_name_size; /* in/out */ 526 /* 527 * If set to non-zero value, signals the request to extract and return 528 * VMA's backing file's build ID, if the backing file is an ELF file 529 * and it contains embedded build ID. 530 * 531 * Kernel will set this field to zero, if VMA has no backing file, 532 * backing file is not an ELF file, or ELF file has no build ID 533 * embedded. 534 * 535 * Build ID is a binary value (not a string). Kernel will set 536 * build_id_size field to exact number of bytes used for build ID. 537 * If build ID is requested and present, but needs more bytes than 538 * user-supplied maximum buffer size (see build_id_addr field below), 539 * -E2BIG error will be returned. 540 * 541 * If this field is set to non-zero value, build_id_addr should point 542 * to valid user space memory buffer of at least build_id_size bytes. 543 * If set to zero, build_id_addr should be set to zero as well 544 */ 545 __u32 build_id_size; /* in/out */ 546 /* 547 * User-supplied address of a buffer of at least vma_name_size bytes 548 * for kernel to fill with matched VMA's name (see vma_name_size field 549 * description above for details). 550 * 551 * Should be set to zero if VMA name should not be returned. 552 */ 553 __u64 vma_name_addr; /* in */ 554 /* 555 * User-supplied address of a buffer of at least build_id_size bytes 556 * for kernel to fill with matched VMA's ELF build ID, if available 557 * (see build_id_size field description above for details). 558 * 559 * Should be set to zero if build ID should not be returned. 560 */ 561 __u64 build_id_addr; /* in */ 562 }; 563 564 #endif /* _UAPI_LINUX_FS_H */ 565