1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _SYS_MMAN_H_ 33 #define _SYS_MMAN_H_ 34 35 #include <sys/cdefs.h> 36 #include <sys/_types.h> 37 38 #if __BSD_VISIBLE 39 /* 40 * Inheritance for minherit() 41 */ 42 #define INHERIT_SHARE 0 43 #define INHERIT_COPY 1 44 #define INHERIT_NONE 2 45 #define INHERIT_ZERO 3 46 #endif 47 48 /* 49 * Protections are chosen from these bits, or-ed together 50 */ 51 #define PROT_NONE 0x00 /* no permissions */ 52 #define PROT_READ 0x01 /* pages can be read */ 53 #define PROT_WRITE 0x02 /* pages can be written */ 54 #define PROT_EXEC 0x04 /* pages can be executed */ 55 #if __BSD_VISIBLE 56 #define _PROT_ALL (PROT_READ | PROT_WRITE | PROT_EXEC) 57 #define PROT_EXTRACT(prot) ((prot) & _PROT_ALL) 58 59 #define _PROT_MAX_SHIFT 16 60 #define PROT_MAX(prot) ((prot) << _PROT_MAX_SHIFT) 61 #define PROT_MAX_EXTRACT(prot) (((prot) >> _PROT_MAX_SHIFT) & _PROT_ALL) 62 #endif 63 64 /* 65 * Flags contain sharing type and options. 66 * Sharing types; choose one. 67 */ 68 #define MAP_SHARED 0x0001 /* share changes */ 69 #define MAP_PRIVATE 0x0002 /* changes are private */ 70 #if __BSD_VISIBLE 71 #define MAP_COPY MAP_PRIVATE /* Obsolete */ 72 #endif 73 74 /* 75 * Other flags 76 */ 77 #define MAP_FIXED 0x0010 /* map addr must be exactly as requested */ 78 79 #if __BSD_VISIBLE 80 #define MAP_RESERVED0020 0x0020 /* previously unimplemented MAP_RENAME */ 81 #define MAP_RESERVED0040 0x0040 /* previously unimplemented MAP_NORESERVE */ 82 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */ 83 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */ 84 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */ 85 #define MAP_STACK 0x0400 /* region grows down, like a stack */ 86 #define MAP_NOSYNC 0x0800 /* page to but do not sync underlying file */ 87 88 /* 89 * Mapping type 90 */ 91 #define MAP_FILE 0x0000 /* map from file (default) */ 92 #define MAP_ANON 0x1000 /* allocated from memory, swap space */ 93 #ifndef _KERNEL 94 #define MAP_ANONYMOUS MAP_ANON /* For compatibility. */ 95 #endif /* !_KERNEL */ 96 97 /* 98 * Extended flags 99 */ 100 #define MAP_GUARD 0x00002000 /* reserve but don't map address range */ 101 #define MAP_EXCL 0x00004000 /* for MAP_FIXED, fail if address is used */ 102 #define MAP_NOCORE 0x00020000 /* dont include these pages in a coredump */ 103 #define MAP_PREFAULT_READ 0x00040000 /* prefault mapping for reading */ 104 #define MAP_32BIT 0x00080000 /* map in the low 2GB of address space */ 105 106 /* 107 * Request specific alignment (n == log2 of the desired alignment). 108 * 109 * MAP_ALIGNED_SUPER requests optimal superpage alignment, but does 110 * not enforce a specific alignment. 111 */ 112 #define MAP_ALIGNED(n) ((n) << MAP_ALIGNMENT_SHIFT) 113 #define MAP_ALIGNMENT_SHIFT 24 114 #define MAP_ALIGNMENT_MASK MAP_ALIGNED(0xff) 115 #define MAP_ALIGNED_SUPER MAP_ALIGNED(1) /* align on a superpage */ 116 117 /* 118 * Flags provided to shm_rename 119 */ 120 /* Don't overwrite dest, if it exists */ 121 #define SHM_RENAME_NOREPLACE (1 << 0) 122 /* Atomically swap src and dest */ 123 #define SHM_RENAME_EXCHANGE (1 << 1) 124 125 #endif /* __BSD_VISIBLE */ 126 127 #if __POSIX_VISIBLE >= 199309 128 /* 129 * Process memory locking 130 */ 131 #define MCL_CURRENT 0x0001 /* Lock only current memory */ 132 #define MCL_FUTURE 0x0002 /* Lock all future memory as well */ 133 #endif 134 135 /* 136 * Error return from mmap() 137 */ 138 #define MAP_FAILED ((void *)-1) 139 140 /* 141 * msync() flags 142 */ 143 #define MS_SYNC 0x0000 /* msync synchronously */ 144 #define MS_ASYNC 0x0001 /* return immediately */ 145 #define MS_INVALIDATE 0x0002 /* invalidate all cached data */ 146 147 /* 148 * Advice to madvise 149 */ 150 #define _MADV_NORMAL 0 /* no further special treatment */ 151 #define _MADV_RANDOM 1 /* expect random page references */ 152 #define _MADV_SEQUENTIAL 2 /* expect sequential page references */ 153 #define _MADV_WILLNEED 3 /* will need these pages */ 154 #define _MADV_DONTNEED 4 /* dont need these pages */ 155 156 #if __BSD_VISIBLE 157 #define MADV_NORMAL _MADV_NORMAL 158 #define MADV_RANDOM _MADV_RANDOM 159 #define MADV_SEQUENTIAL _MADV_SEQUENTIAL 160 #define MADV_WILLNEED _MADV_WILLNEED 161 #define MADV_DONTNEED _MADV_DONTNEED 162 #define MADV_FREE 5 /* dont need these pages, and junk contents */ 163 #define MADV_NOSYNC 6 /* try to avoid flushes to physical media */ 164 #define MADV_AUTOSYNC 7 /* revert to default flushing strategy */ 165 #define MADV_NOCORE 8 /* do not include these pages in a core file */ 166 #define MADV_CORE 9 /* revert to including pages in a core file */ 167 #define MADV_PROTECT 10 /* protect process from pageout kill */ 168 169 /* 170 * Return bits from mincore 171 */ 172 #define MINCORE_INCORE 0x1 /* Page is incore */ 173 #define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */ 174 #define MINCORE_MODIFIED 0x4 /* Page has been modified by us */ 175 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */ 176 #define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */ 177 #define MINCORE_SUPER 0x60 /* Page is a "super" page */ 178 #define MINCORE_PSIND(i) (((i) << 5) & MINCORE_SUPER) /* Page size */ 179 180 /* 181 * Anonymous object constant for shm_open(). 182 */ 183 #define SHM_ANON ((char *)1) 184 185 /* 186 * shmflags for shm_open2() 187 */ 188 #define SHM_ALLOW_SEALING 0x00000001 189 #define SHM_GROW_ON_WRITE 0x00000002 190 #define SHM_LARGEPAGE 0x00000004 191 192 #define SHM_LARGEPAGE_ALLOC_DEFAULT 0 193 #define SHM_LARGEPAGE_ALLOC_NOWAIT 1 194 #define SHM_LARGEPAGE_ALLOC_HARD 2 195 196 struct shm_largepage_conf { 197 int psind; 198 int alloc_policy; 199 int pad[10]; 200 }; 201 202 /* 203 * Flags for memfd_create(). 204 */ 205 #define MFD_CLOEXEC 0x00000001 206 #define MFD_ALLOW_SEALING 0x00000002 207 208 #define MFD_HUGETLB 0x00000004 209 210 #define MFD_HUGE_MASK 0xFC000000 211 #define MFD_HUGE_SHIFT 26 212 #define MFD_HUGE_64KB (16 << MFD_HUGE_SHIFT) 213 #define MFD_HUGE_512KB (19 << MFD_HUGE_SHIFT) 214 #define MFD_HUGE_1MB (20 << MFD_HUGE_SHIFT) 215 #define MFD_HUGE_2MB (21 << MFD_HUGE_SHIFT) 216 #define MFD_HUGE_8MB (23 << MFD_HUGE_SHIFT) 217 #define MFD_HUGE_16MB (24 << MFD_HUGE_SHIFT) 218 #define MFD_HUGE_32MB (25 << MFD_HUGE_SHIFT) 219 #define MFD_HUGE_256MB (28 << MFD_HUGE_SHIFT) 220 #define MFD_HUGE_512MB (29 << MFD_HUGE_SHIFT) 221 #define MFD_HUGE_1GB (30 << MFD_HUGE_SHIFT) 222 #define MFD_HUGE_2GB (31 << MFD_HUGE_SHIFT) 223 #define MFD_HUGE_16GB (34 << MFD_HUGE_SHIFT) 224 225 #endif /* __BSD_VISIBLE */ 226 227 /* 228 * XXX missing POSIX_TYPED_MEM_* macros and 229 * posix_typed_mem_info structure. 230 */ 231 #if __POSIX_VISIBLE >= 200112 232 #define POSIX_MADV_NORMAL _MADV_NORMAL 233 #define POSIX_MADV_RANDOM _MADV_RANDOM 234 #define POSIX_MADV_SEQUENTIAL _MADV_SEQUENTIAL 235 #define POSIX_MADV_WILLNEED _MADV_WILLNEED 236 #define POSIX_MADV_DONTNEED _MADV_DONTNEED 237 #endif 238 239 #ifndef _MODE_T_DECLARED 240 typedef __mode_t mode_t; 241 #define _MODE_T_DECLARED 242 #endif 243 244 #ifndef _OFF_T_DECLARED 245 typedef __off_t off_t; 246 #define _OFF_T_DECLARED 247 #endif 248 249 #ifndef _SIZE_T_DECLARED 250 typedef __size_t size_t; 251 #define _SIZE_T_DECLARED 252 #endif 253 254 #if defined(_KERNEL) || defined(_WANT_FILE) 255 #include <sys/lock.h> 256 #include <sys/mutex.h> 257 #include <sys/queue.h> 258 #include <sys/rangelock.h> 259 #include <vm/vm.h> 260 261 struct file; 262 263 struct shmfd { 264 vm_ooffset_t shm_size; 265 vm_object_t shm_object; 266 vm_pindex_t shm_pages; /* allocated pages */ 267 int shm_refs; 268 uid_t shm_uid; 269 gid_t shm_gid; 270 mode_t shm_mode; 271 int shm_kmappings; 272 273 /* 274 * Values maintained solely to make this a better-behaved file 275 * descriptor for fstat() to run on. 276 */ 277 struct timespec shm_atime; 278 struct timespec shm_mtime; 279 struct timespec shm_ctime; 280 struct timespec shm_birthtime; 281 ino_t shm_ino; 282 283 struct label *shm_label; /* MAC label */ 284 const char *shm_path; 285 286 struct rangelock shm_rl; 287 struct mtx shm_mtx; 288 289 int shm_flags; 290 int shm_seals; 291 292 /* largepage config */ 293 int shm_lp_psind; 294 int shm_lp_alloc_policy; 295 }; 296 #endif 297 298 #ifdef _KERNEL 299 struct prison; 300 301 int shm_map(struct file *fp, size_t size, off_t offset, void **memp); 302 int shm_unmap(struct file *fp, void *mem, size_t size); 303 304 int shm_access(struct shmfd *shmfd, struct ucred *ucred, int flags); 305 struct shmfd *shm_alloc(struct ucred *ucred, mode_t mode, bool largepage); 306 struct shmfd *shm_hold(struct shmfd *shmfd); 307 void shm_drop(struct shmfd *shmfd); 308 int shm_dotruncate(struct shmfd *shmfd, off_t length); 309 bool shm_largepage(struct shmfd *shmfd); 310 void shm_remove_prison(struct prison *pr); 311 312 extern struct fileops shm_ops; 313 314 #define MAP_32BIT_MAX_ADDR ((vm_offset_t)1 << 31) 315 316 #else /* !_KERNEL */ 317 318 __BEGIN_DECLS 319 /* 320 * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(), 321 * posix_typed_mem_open(). 322 */ 323 #if __BSD_VISIBLE 324 int getpagesizes(size_t *, int); 325 int madvise(void *, size_t, int); 326 int mincore(const void *, size_t, char *); 327 int minherit(void *, size_t, int); 328 #endif 329 int mlock(const void *, size_t); 330 #ifndef _MMAP_DECLARED 331 #define _MMAP_DECLARED 332 void * mmap(void *, size_t, int, int, int, off_t); 333 #endif 334 int mprotect(void *, size_t, int); 335 int msync(void *, size_t, int); 336 int munlock(const void *, size_t); 337 int munmap(void *, size_t); 338 #if __POSIX_VISIBLE >= 200112 339 int posix_madvise(void *, size_t, int); 340 #endif 341 #if __POSIX_VISIBLE >= 199309 342 int mlockall(int); 343 int munlockall(void); 344 int shm_open(const char *, int, mode_t); 345 int shm_unlink(const char *); 346 #endif 347 #if __BSD_VISIBLE 348 int memfd_create(const char *, unsigned int); 349 int shm_create_largepage(const char *, int, int, int, mode_t); 350 int shm_rename(const char *, const char *, int); 351 #endif 352 __END_DECLS 353 354 #endif /* !_KERNEL */ 355 356 #endif /* !_SYS_MMAN_H_ */ 357