1 /* 2 * Copyright (c) 2000-2012 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29 /* 30 * Copyright (c) 1989, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by the University of 44 * California, Berkeley and its contributors. 45 * 4. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)vnode.h 8.17 (Berkeley) 5/20/95 62 */ 63 /* 64 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce 65 * support for mandatory and extensible security protections. This notice 66 * is included in support of clause 2.2 (b) of the Apple Public License, 67 * Version 2.0. 68 */ 69 70 #ifndef _SYS_VNODE_INTERNAL_H_ 71 #define _SYS_VNODE_INTERNAL_H_ 72 73 #include <sys/appleapiopts.h> 74 #include <sys/cdefs.h> 75 #include <sys/queue.h> 76 #include <sys/lock.h> 77 78 #include <sys/time.h> 79 #include <sys/uio.h> 80 81 #include <sys/vm.h> 82 #include <sys/systm.h> 83 #include <kern/locks.h> 84 #include <vm/vm_kern.h> 85 #include <sys/vnode.h> 86 #include <sys/namei.h> 87 #include <kern/smr.h> 88 #include <sys/vfs_context.h> 89 #include <sys/sysctl.h> 90 91 92 struct lockf; 93 struct label; 94 95 LIST_HEAD(buflists, buf); 96 97 #if CONFIG_TRIGGERS 98 /* 99 * VFS Internal (private) trigger vnode resolver info. 100 */ 101 struct vnode_resolve { 102 lck_mtx_t vr_lock; /* protects vnode_resolve_t fields */ 103 trigger_vnode_resolve_callback_t vr_resolve_func; 104 trigger_vnode_unresolve_callback_t vr_unresolve_func; 105 trigger_vnode_rearm_callback_t vr_rearm_func; 106 trigger_vnode_reclaim_callback_t vr_reclaim_func; 107 void * vr_data; /* private data for resolver */ 108 uint32_t vr_flags; 109 uint32_t vr_lastseq; 110 }; 111 typedef struct vnode_resolve *vnode_resolve_t; 112 113 /* private vr_flags */ 114 #define VNT_RESOLVED (1UL << 31) 115 #define VNT_VFS_UNMOUNTED (1UL << 30) 116 #define VNT_EXTERNAL (1UL << 29) 117 118 #endif /* CONFIG_TRIGGERS */ 119 120 #if CONFIG_IOCOUNT_TRACE 121 #define IOCOUNT_TRACE_VGET 0 122 #define IOCOUNT_TRACE_VPUT 1 123 #define IOCOUNT_TRACE_MAX_TYPES 2 124 #define IOCOUNT_TRACE_MAX_IDX 16 125 #define IOCOUNT_TRACE_MAX_FRAMES 10 126 127 struct vnode_iocount_trace { 128 int idx; 129 int counts[IOCOUNT_TRACE_MAX_IDX]; 130 void *stacks[IOCOUNT_TRACE_MAX_IDX][IOCOUNT_TRACE_MAX_FRAMES]; 131 }; 132 typedef struct vnode_iocount_trace *vnode_iocount_trace_t; 133 #endif /* CONFIG_IOCOUNT_TRACE */ 134 135 #if CONFIG_FILE_LEASES 136 #define FL_FLAG_RELEASE_PENDING 0x00000001 137 #define FL_FLAG_DOWNGRADE_PENDING 0x00000002 138 139 struct file_lease { 140 LIST_ENTRY(file_lease) fl_link; 141 struct fileglob *fl_fg; /* The file that the lease is placed on */ 142 pid_t fl_pid; /* The process's pid that owns the lease */ 143 int fl_type; /* The file lease type: F_RDLCK, F_WRLCK */ 144 uint32_t fl_flags; /* The file lease flags */ 145 uint64_t fl_release_start; /* The lease release start time */ 146 uint64_t fl_downgrade_start; /* The lease downgrade start time */ 147 }; 148 typedef struct file_lease *file_lease_t; 149 #endif /* CONFIG_FILE_LEASES */ 150 151 /* 152 * Reading or writing any of these items requires holding the appropriate lock. 153 * v_freelist is locked by the global vnode_list_lock 154 * v_mntvnodes is locked by the mount_lock 155 * v_nclinks and v_ncchildren are protected by the global name_cache_lock 156 * v_cleanblkhd and v_dirtyblkhd and v_iterblkflags are locked via the global buf_mtx 157 * the rest of the structure is protected by the vnode_lock 158 */ 159 struct vnode { 160 lck_mtx_t v_lock; /* vnode mutex */ 161 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 162 TAILQ_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */ 163 TAILQ_HEAD(, namecache) v_ncchildren; /* name cache entries that regard us as their parent */ 164 LIST_HEAD(, namecache) v_nclinks; /* name cache entries that name this vnode */ 165 vnode_t v_defer_reclaimlist; /* in case we have to defer the reclaim to avoid recursion */ 166 uint32_t v_listflag; /* flags protected by the vnode_list_lock (see below) */ 167 uint32_t v_flag; /* vnode flags (see below) */ 168 uint16_t v_lflag; /* vnode local and named ref flags */ 169 uint8_t v_iterblkflags; /* buf iterator flags */ 170 uint8_t v_references; /* number of times io_count has been granted */ 171 int32_t v_kusecount; /* count of in-kernel refs */ 172 int32_t v_usecount; /* reference count of users */ 173 int32_t v_iocount; /* iocounters */ 174 void * XNU_PTRAUTH_SIGNED_PTR("vnode.v_owner") v_owner; /* act that owns the vnode */ 175 uint16_t v_type; /* vnode type */ 176 uint16_t v_tag; /* type of underlying data */ 177 uint32_t v_id; /* identity of vnode contents */ 178 union { 179 struct mount * XNU_PTRAUTH_SIGNED_PTR("vnode.v_data") vu_mountedhere; /* ptr to mounted vfs (VDIR) */ 180 struct socket * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_socket") vu_socket; /* unix ipc (VSOCK) */ 181 struct specinfo * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_specinfo") vu_specinfo; /* device (VCHR, VBLK) */ 182 struct fifoinfo * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_fifoinfo") vu_fifoinfo; /* fifo (VFIFO) */ 183 struct ubc_info * XNU_PTRAUTH_SIGNED_PTR("vnode.vu_ubcinfo") vu_ubcinfo; /* valid for (VREG) */ 184 } v_un; 185 struct buflists v_cleanblkhd; /* clean blocklist head */ 186 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 187 struct klist v_knotes; /* knotes attached to this vnode */ 188 /* 189 * the following 4 fields are protected 190 * by the name_cache_lock held in 191 * excluive mode 192 */ 193 kauth_cred_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_cred") v_cred; /* last authorized credential */ 194 kauth_action_t v_authorized_actions; /* current authorized actions for v_cred */ 195 int v_cred_timestamp; /* determine if entry is stale for MNTK_AUTH_OPAQUE */ 196 int v_nc_generation; /* changes when nodes are removed from the name cache */ 197 /* 198 * back to the vnode lock for protection 199 */ 200 int32_t v_numoutput; /* num of writes in progress */ 201 int32_t v_writecount; /* reference count of writers */ 202 uint32_t v_holdcount; /* reference to keep vnode from being freed after reclaim */ 203 const char *v_name; /* name component of the vnode */ 204 vnode_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_parent") v_parent; /* pointer to parent vnode */ 205 struct lockf *v_lockf; /* advisory lock list head */ 206 int(**v_op)(void *); /* vnode operations vector */ 207 mount_t XNU_PTRAUTH_SIGNED_PTR("vnode.v_mount") v_mount; /* ptr to vfs we are in */ 208 void * v_data; /* private data for fs */ 209 #if CONFIG_MACF 210 struct label *v_label; /* MAC security label */ 211 #endif 212 #if CONFIG_TRIGGERS 213 vnode_resolve_t v_resolve; /* trigger vnode resolve info (VDIR only) */ 214 #endif /* CONFIG_TRIGGERS */ 215 #if CONFIG_FIRMLINKS 216 vnode_t v_fmlink; /* firmlink if set (VDIR only), Points to source 217 * if VFLINKTARGET is set, if VFLINKTARGET is not 218 * set, points to target */ 219 #endif /* CONFIG_FIRMLINKS */ 220 #if CONFIG_IO_COMPRESSION_STATS 221 io_compression_stats_t io_compression_stats; /* IO compression statistics */ 222 #endif /* CONFIG_IO_COMPRESSION_STATS */ 223 224 #if CONFIG_IOCOUNT_TRACE 225 vnode_iocount_trace_t v_iocount_trace; 226 #endif /* CONFIG_IOCOUNT_TRACE */ 227 228 #if CONFIG_FILE_LEASES 229 LIST_HEAD(fl_head, file_lease) v_leases; /* list of leases in place */ 230 #endif /* CONFIG_FILE_LEASES */ 231 }; 232 233 #define v_mountedhere v_un.vu_mountedhere 234 #define v_socket v_un.vu_socket 235 #define v_specinfo v_un.vu_specinfo 236 #define v_fifoinfo v_un.vu_fifoinfo 237 #define v_ubcinfo v_un.vu_ubcinfo 238 239 240 /* 241 * v_iterblkflags 242 */ 243 #define VBI_ITER 0x1 244 #define VBI_ITERWANT 0x2 245 #define VBI_CLEAN 0x4 246 #define VBI_DIRTY 0x8 247 #define VBI_NEWBUF 0x10 248 249 /* 250 * v_listflag 251 */ 252 #define VLIST_RAGE 0x01 /* vnode is currently in the rapid age list */ 253 #define VLIST_DEAD 0x02 /* vnode is currently in the dead list */ 254 #define VLIST_ASYNC_WORK 0x04 /* vnode is currently on the deferred async work queue */ 255 #define VLIST_NO_REUSE 0x08 /* vnode should not be reused, will be deallocated */ 256 257 /* 258 * v_lflags 259 */ 260 #define VL_SUSPENDED 0x0001 /* vnode is suspended */ 261 #define VL_DRAIN 0x0002 /* vnode is being drained */ 262 #define VL_TERMINATE 0x0004 /* vnode is in the process of being recycled */ 263 #define VL_TERMWANT 0x0008 /* there's a waiter for recycle finish (vnode_getiocount)*/ 264 #define VL_DEAD 0x0010 /* vnode is dead, cleaned of filesystem-specific info */ 265 #define VL_MARKTERM 0x0020 /* vnode should be recycled when no longer referenced */ 266 #define VL_OPSCHANGE 0x0040 /* device vnode is changing vnodeops */ 267 #define VL_NEEDINACTIVE 0x0080 /* delay VNOP_INACTIVE until iocount goes to 0 */ 268 269 #define VL_LABEL 0x0100 /* vnode is marked for labeling */ 270 #define VL_LABELWAIT 0x0200 /* vnode is marked for labeling */ 271 #define VL_LABELED 0x0400 /* vnode is labeled */ 272 #define VL_LWARNED 0x0800 273 #define VL_HASSTREAMS 0x1000 /* vnode has had at least one associated named stream vnode (may not have one any longer) */ 274 275 #define VNAMED_UBC 0x2000 /* ubc named reference */ 276 #define VNAMED_MOUNT 0x4000 /* mount point named reference */ 277 #define VNAMED_FSHASH 0x8000 /* FS hash named reference */ 278 279 /* 280 * v_flags 281 */ 282 #define VROOT 0x000001 /* root of its file system */ 283 #define VTEXT 0x000002 /* vnode is a pure text prototype */ 284 #define VSYSTEM 0x000004 /* vnode being used by kernel */ 285 #define VISTTY 0x000008 /* vnode represents a tty */ 286 #define VRAGE 0x000010 /* vnode is in rapid age state */ 287 #define VBDEVVP 0x000020 /* vnode created by bdevvp */ 288 #define VDEVFLUSH 0x000040 /* device vnode after vflush */ 289 #define VMOUNT 0x000080 /* mount operation in progress */ 290 #define VBWAIT 0x000100 /* waiting for output to complete */ 291 #define VSHARED_DYLD 0x000200 /* vnode is a dyld shared cache file */ 292 #define VNOCACHE_DATA 0x000400 /* don't keep data cached once it's been consumed */ 293 #define VSTANDARD 0x000800 /* vnode obtained from common pool */ 294 #define VAGE 0x001000 /* Insert vnode at head of free list */ 295 #define VRAOFF 0x002000 /* read ahead disabled */ 296 #define VNCACHEABLE 0x004000 /* vnode is allowed to be put back in name cache */ 297 #if NAMEDSTREAMS 298 #define VISSHADOW 0x008000 /* vnode is a shadow file */ 299 #endif 300 #define VSWAP 0x010000 /* vnode is being used as swapfile */ 301 #define VTHROTTLED 0x020000 /* writes or pageouts have been throttled */ 302 /* wakeup tasks waiting when count falls below threshold */ 303 #define VNOFLUSH 0x040000 /* don't vflush() if SKIPSYSTEM */ 304 #define VLOCKLOCAL 0x080000 /* this vnode does adv locking in vfs */ 305 #define VISHARDLINK 0x100000 /* hard link needs special processing on lookup and in volfs */ 306 #define VISUNION 0x200000 /* union special processing */ 307 #define VISNAMEDSTREAM 0x400000 /* vnode is a named stream (eg HFS resource fork) */ 308 #define VOPENEVT 0x800000 /* if process is P_CHECKOPENEVT, then or in the O_EVTONLY flag on open */ 309 #define VCANDEALLOC 0x1000000 310 #define VNOCS 0x2000000 /* is there no code signature available */ 311 #define VISDIRTY 0x4000000 /* vnode will need IO if reclaimed */ 312 #define VFASTDEVCANDIDATE 0x8000000 /* vnode is a candidate to store on a fast device */ 313 #define VAUTOCANDIDATE 0x10000000 /* vnode was automatically marked as a fast-dev candidate */ 314 #define VFMLINKTARGET 0x20000000 /* vnode is firmlink target */ 315 #define VMOUNTEDHERE 0x40000000 /* vnode is a mountpoint */ 316 /* 317 * 0x80000000 not used. 318 */ 319 320 /* 321 * This structure describes vnode data which is specific to a file descriptor. 322 * It is currently used only for file descriptors which are for opened for 323 * directories. 324 */ 325 struct fd_vn_data { 326 lck_mtx_t fv_lock; /* Used to serialize directory enumeration on fd */ 327 off_t fv_offset; /* Offset to be used */ 328 void *fv_dircookie; /* If FS doesn't like offsets in directories */ 329 caddr_t fv_buf; /* Temporary buffer to store directory entries */ 330 size_t fv_bufsiz; /* Valid size of fv_buf */ 331 size_t fv_bufdone; /* How much of fv_buf is processed */ 332 size_t fv_bufallocsiz; /* Allocation size determined for Buffer*/ 333 off_t fv_soff; /* Starting FS offset for this buffer */ 334 off_t fv_eoff; /* Ending FS offset for this buffer */ 335 int fv_eofflag;/* Does fv_eoff represent EOF ? */ 336 }; 337 338 /* 339 * FV_DIRBUF_START_SIZ is the initial size of the buffer passed to VNOP_READDIR. 340 * That may not be enough for some filesytems so the current algorithm works its 341 * way upto FV_DIRBUF_MAX_SIZ 342 */ 343 #define FV_DIRBUF_DIRENTRY_SIZ (sizeof(struct direntry)) 344 #define FV_DIRBUF_START_SIZ FV_DIRBUF_DIRENTRY_SIZ 345 #define FV_DIRBUF_MAX_SIZ (4*(sizeof(struct direntry))) 346 347 #define FV_LOCK(fvd) lck_mtx_lock(&(((struct fd_vn_data *)fvd)->fv_lock)) 348 #define FV_UNLOCK(fvd) lck_mtx_unlock(&(((struct fd_vn_data *)fvd)->fv_lock)) 349 350 /* 351 * Global vnode data. 352 */ 353 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 354 355 #ifdef CONFIG_IMGSRC_ACCESS 356 #define MAX_IMAGEBOOT_NESTING 2 357 extern struct vnode *imgsrc_rootvnodes[]; 358 #endif /* CONFIG_IMGSRC_ACCESS */ 359 360 361 /* 362 * Mods for exensibility. 363 */ 364 365 /* 366 * Flags for vdesc_flags: 367 */ 368 #define VDESC_MAX_VPS 16 369 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 370 #define VDESC_VP0_WILLRELE 0x00001 371 #define VDESC_VP1_WILLRELE 0x00002 372 #define VDESC_VP2_WILLRELE 0x00004 373 #define VDESC_VP3_WILLRELE 0x00008 374 #define VDESC_NOMAP_VPP 0x00100 375 #define VDESC_VPP_WILLRELE 0x00200 376 377 #define VDESC_DISABLED 0x10000 /* descriptor defined but op is unused, has no op slot */ 378 379 /* 380 * VDESC_NO_OFFSET is used to identify the end of the offset list 381 * and in places where no such field exists. 382 */ 383 #define VDESC_NO_OFFSET -1 384 385 /* 386 * This structure describes the vnode operation taking place. 387 */ 388 struct vnodeop_desc { 389 int vdesc_offset; /* offset in vector--first for speed */ 390 const char *vdesc_name; /* a readable name for debugging */ 391 int vdesc_flags; /* VDESC_* flags */ 392 393 /* 394 * These ops are used by bypass routines to map and locate arguments. 395 * Creds and procs are not needed in bypass routines, but sometimes 396 * they are useful to (for example) transport layers. 397 * Nameidata is useful because it has a cred in it. 398 */ 399 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 400 int vdesc_vpp_offset; /* return vpp location */ 401 int vdesc_cred_offset; /* cred location, if any */ 402 int vdesc_proc_offset; /* proc location, if any */ 403 int vdesc_componentname_offset; /* if any */ 404 int vdesc_context_offset; /* context location, if any */ 405 /* 406 * Finally, we've got a list of private data (about each operation) 407 * for each transport layer. (Support to manage this list is not 408 * yet part of BSD.) 409 */ 410 caddr_t *vdesc_transports; 411 }; 412 413 /* 414 * A list of all the operation descs. 415 */ 416 extern struct vnodeop_desc *vnodeop_descs[]; 417 418 419 /* 420 * This macro is very helpful in defining those offsets in the vdesc struct. 421 * 422 * This is stolen from X11R4. I ingored all the fancy stuff for 423 * Crays, so if you decide to port this to such a serious machine, 424 * you might want to consult Intrisics.h's XtOffset{,Of,To}. 425 */ 426 #define VOPARG_OFFSET(p_type, field) \ 427 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 428 #define VOPARG_OFFSETOF(s_type, field) \ 429 VOPARG_OFFSET(s_type*,field) 430 #define VOPARG_OFFSETTO(S_TYPE, S_OFFSET, STRUCT_P) \ 431 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 432 433 434 435 /* 436 * VOCALL calls an op given an ops vector. We break it out because BSD's 437 * vclean changes the ops vector and then wants to call ops with the old 438 * vector. 439 */ 440 #define VOCALL(OPSV, OFF, AP) (( *((OPSV)[(OFF)])) (AP)) 441 442 /* 443 * This call works for vnodes in the kernel. 444 */ 445 #define VCALL(VP, OFF, AP) VOCALL((VP)->v_op,(OFF),(AP)) 446 #define VDESC(OP) (& __CONCAT(OP,_desc)) 447 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 448 449 struct ostat; 450 451 /* bdevvp moved to vnode.h as private KPI */ 452 void cvtstat(struct stat *st, struct ostat *ost); 453 void vprint(const char *label, struct vnode *vp); 454 455 456 __private_extern__ int set_package_extensions_table(user_addr_t data, int nentries, int maxwidth); 457 int vn_rdwr_64(enum uio_rw rw, struct vnode *vp, uint64_t base, 458 int64_t len, off_t offset, enum uio_seg segflg, 459 int ioflg, kauth_cred_t cred, int64_t *aresid, 460 struct proc *p); 461 #if CONFIG_MACF 462 int vn_setlabel(struct vnode *vp, struct label *intlabel, 463 vfs_context_t context); 464 #endif 465 void fifo_printinfo(struct vnode *vp); 466 int vn_open(struct nameidata *ndp, int fmode, int cmode); 467 int vn_open_modflags(struct nameidata *ndp, int *fmode, int cmode); 468 int vn_open_auth(struct nameidata *ndp, int *fmode, struct vnode_attr *, vnode_t authvp); 469 int vn_close(vnode_t, int flags, vfs_context_t ctx); 470 errno_t vn_remove(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, int32_t flags, struct vnode_attr *vap, vfs_context_t ctx); 471 errno_t vn_rename(struct vnode *fdvp, struct vnode **fvpp, struct componentname *fcnp, struct vnode_attr *fvap, 472 struct vnode *tdvp, struct vnode **tvpp, struct componentname *tcnp, struct vnode_attr *tvap, 473 uint32_t flags, vfs_context_t ctx); 474 475 void lock_vnode_and_post(vnode_t, int); 476 477 #define post_event_if_success(_vp, _error, _event) \ 478 do { \ 479 if (0 == (_error)) { \ 480 lock_vnode_and_post((_vp), (_event)); \ 481 } \ 482 } while (0) 483 484 /* Authorization subroutines */ 485 int vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs_context_t ctx, void *reserved); 486 int vn_authorize_create(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*); 487 int vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fieldsp, vfs_context_t ctx); 488 void vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields); 489 int vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, 490 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, 491 vfs_context_t ctx, void *reserved); 492 int vn_authorize_renamex(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, 493 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, 494 vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved); 495 int vn_authorize_renamex_with_paths(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, const char *from_path, 496 struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, const char *to_path, 497 vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved); 498 499 typedef int (*vn_create_authorizer_t)(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*); 500 int vn_authorize_mkdir(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*); 501 int vn_authorize_null(vnode_t, struct componentname *, struct vnode_attr *, vfs_context_t, void*); 502 int vnode_attr_authorize_dir_clone(struct vnode_attr *vap, kauth_action_t action, 503 struct vnode_attr *dvap, vnode_t sdvp, mount_t mp, dir_clone_authorizer_op_t vattr_op, 504 uint32_t flags, vfs_context_t ctx, void *reserved); 505 /* End of authorization subroutines */ 506 507 void vnode_attr_handle_uid_and_gid(struct vnode_attr *vap, mount_t mp, vfs_context_t ctx); 508 509 #define VN_CREATE_NOAUTH (1<<0) 510 #define VN_CREATE_NOINHERIT (1<<1) 511 #define VN_CREATE_UNION (1<<2) 512 #define VN_CREATE_NOLABEL (1<<3) 513 #define VN_CREATE_DOOPEN (1<<4) /* Open file if a batched operation is available */ 514 errno_t vn_create(vnode_t, vnode_t *, struct nameidata *, struct vnode_attr *, uint32_t, int, uint32_t*, vfs_context_t); 515 int vn_mkdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx); 516 int vn_rmdir(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, vfs_context_t ctx); 517 518 int vn_getxattr(vnode_t, const char *, uio_t, size_t *, int, vfs_context_t); 519 int vn_setxattr(vnode_t, const char *, uio_t, int, vfs_context_t); 520 int vn_removexattr(vnode_t, const char *, int, vfs_context_t); 521 int vn_listxattr(vnode_t, uio_t, size_t *, int, vfs_context_t); 522 523 #if NAMEDSTREAMS 524 errno_t vnode_getnamedstream(vnode_t, vnode_t *, const char *, enum nsoperation, int, vfs_context_t); 525 errno_t vnode_makenamedstream(vnode_t, vnode_t *, const char *, int, vfs_context_t); 526 errno_t vnode_removenamedstream(vnode_t, vnode_t, const char *, int, vfs_context_t); 527 errno_t vnode_flushnamedstream(vnode_t vp, vnode_t svp, vfs_context_t context); 528 errno_t vnode_relenamedstream(vnode_t vp, vnode_t svp); 529 errno_t vnode_verifynamedstream(vnode_t vp); 530 #endif 531 532 533 void nchinit(void); 534 int resize_namecache(int newsize); 535 void name_cache_lock_shared(void); 536 boolean_t name_cache_lock_shared_to_exclusive(void); 537 void name_cache_lock(void); 538 void name_cache_unlock(void); 539 void cache_enter_with_gen(vnode_t dvp, vnode_t vp, struct componentname *cnp, int gen); 540 const char *cache_enter_create(vnode_t dvp, vnode_t vp, struct componentname *cnp); 541 542 extern int nc_disabled; 543 544 #define vnode_lock_convert(v) lck_mtx_convert_spin(&(v)->v_lock) 545 546 void vnode_lock_spin(vnode_t); 547 548 549 void vnode_list_lock(void); 550 void vnode_list_unlock(void); 551 552 #define VNODE_REF_FORCE 0x1 553 int vnode_ref_ext(vnode_t, int, int); 554 555 void vnode_rele_internal(vnode_t, int, int, int); 556 #ifdef BSD_KERNEL_PRIVATE 557 int vnode_getalways(vnode_t); 558 int vnode_getalways_from_pager(vnode_t); 559 int vget_internal(vnode_t, int, int); 560 errno_t vnode_getiocount(vnode_t, unsigned int, int); 561 vnode_t vnode_getparent_if_different(vnode_t, vnode_t); 562 #endif /* BSD_KERNEL_PRIVATE */ 563 int vnode_get_locked(vnode_t); 564 int vnode_put_locked(vnode_t); 565 #ifdef BSD_KERNEL_PRIVATE 566 int vnode_put_from_pager(vnode_t); 567 vnode_t vnode_drop_and_unlock(vnode_t); 568 #endif /* BSD_KERNEL_PRIVATE */ 569 570 int vnode_issock(vnode_t); 571 int vnode_isaliased(vnode_t); 572 573 void unlock_fsnode(vnode_t, int *); 574 int lock_fsnode(vnode_t, int *); 575 576 errno_t vnode_resume(vnode_t); 577 errno_t vnode_suspend(vnode_t); 578 579 580 errno_t vnode_mtime(vnode_t, struct timespec *, vfs_context_t); 581 errno_t vnode_flags(vnode_t, uint32_t *, vfs_context_t); 582 583 errno_t vnode_size(vnode_t, off_t *, vfs_context_t); 584 errno_t vnode_setsize(vnode_t, off_t, int ioflag, vfs_context_t); 585 int vnode_setattr_fallback(vnode_t vp, struct vnode_attr *vap, vfs_context_t ctx); 586 int vnode_isspec(vnode_t vp); 587 588 589 #ifdef BSD_KERNEL_PRIVATE 590 591 typedef uint32_t compound_vnop_id_t; 592 #define COMPOUND_VNOP_OPEN 0x01 593 #define COMPOUND_VNOP_MKDIR 0x02 594 #define COMPOUND_VNOP_RENAME 0x04 595 #define COMPOUND_VNOP_REMOVE 0x08 596 #define COMPOUND_VNOP_RMDIR 0x10 597 598 int vnode_compound_rename_available(vnode_t vp); 599 int vnode_compound_rmdir_available(vnode_t vp); 600 int vnode_compound_mkdir_available(vnode_t vp); 601 int vnode_compound_remove_available(vnode_t vp); 602 int vnode_compound_open_available(vnode_t vp); 603 int vnode_compound_op_available(vnode_t, compound_vnop_id_t); 604 #endif /* BSD_KERNEL_PRIVATE */ 605 606 void vn_setunionwait(vnode_t); 607 void vn_checkunionwait(vnode_t); 608 void vn_clearunionwait(vnode_t, int); 609 610 void SPECHASH_LOCK(void); 611 void SPECHASH_UNLOCK(void); 612 lck_mtx_t * SPECHASH_LOCK_ADDR(void); 613 614 void vnode_authorize_init(void); 615 616 void vfsinit(void); 617 void vnode_lock(vnode_t); 618 void vnode_unlock(vnode_t); 619 620 void vn_print_state(vnode_t /* vp */, const char * /* fmt */, ...) 621 __printflike(2, 3); 622 623 #if DEVELOPMENT || DEBUG 624 #define VNASSERT(exp, vp, msg) \ 625 do { \ 626 if (__improbable(!(exp))) { \ 627 vn_print_state(vp, "VNASSERT failed %s:%d\n", __FILE__, \ 628 __LINE__); \ 629 panic msg; \ 630 } \ 631 } while (0) 632 #else 633 #define VNASSERT(exp, vp, msg) 634 #endif /* DEVELOPMENT || DEBUG */ 635 636 /* 637 * XXX exported symbols; should be static 638 */ 639 void vfs_op_init(void); 640 void vfs_opv_init(void); 641 642 #ifdef BSD_KERNEL_PRIVATE 643 int vfs_sysctl_node SYSCTL_HANDLER_ARGS; 644 void vnode_setneedinactive(vnode_t); 645 int vnode_hasnamedstreams(vnode_t); /* Does this vnode have associated named streams? */ 646 647 errno_t 648 vnode_readdir64(struct vnode *vp, struct uio *uio, int flags, int *eofflag, 649 int *numdirent, vfs_context_t ctxp); 650 651 void vnode_setswapmount(vnode_t); 652 int64_t vnode_getswappin_avail(vnode_t); 653 654 int vnode_get_snapdir(vnode_t, vnode_t *, vfs_context_t); 655 656 #if CONFIG_TRIGGERS 657 /* VFS Internal Vnode Trigger Interfaces (Private) */ 658 int vnode_trigger_resolve(vnode_t, struct nameidata *, vfs_context_t); 659 void vnode_trigger_rearm(vnode_t, vfs_context_t); 660 void vfs_nested_trigger_unmounts(mount_t, int, vfs_context_t); 661 #endif /* CONFIG_TRIGGERS */ 662 663 int build_path_with_parent(vnode_t, vnode_t /* parent */, char *, int, int *, size_t *, int, vfs_context_t); 664 665 void nspace_resolver_init(void); 666 void nspace_resolver_exited(struct proc *); 667 668 int vnode_isinuse_locked(vnode_t, int, int ); 669 670 kauth_cred_t vnode_cred(vnode_t); 671 672 int fsgetpath_internal(vfs_context_t, int, uint64_t, vm_size_t, caddr_t, uint32_t options, int *); 673 674 #endif /* BSD_KERNEL_PRIVATE */ 675 676 #if CONFIG_IO_COMPRESSION_STATS 677 /* 678 * update the IO compression stats tracked at block granularity 679 */ 680 int vnode_updateiocompressionblockstats(vnode_t vp, uint32_t size_bucket); 681 682 /* 683 * update the IO compression stats tracked for the buffer 684 */ 685 int vnode_updateiocompressionbufferstats(vnode_t vp, uint64_t uncompressed_size, uint64_t compressed_size, uint32_t size_bucket, uint32_t compression_bucket); 686 687 #endif /* CONFIG_IO_COMPRESSION_STATS */ 688 689 extern bool rootvp_is_ssd; 690 691 #if CONFIG_FILE_LEASES 692 int vnode_setlease(vnode_t vp, struct fileglob *fg, int fl_type, int expcounts, 693 vfs_context_t ctx); 694 int vnode_getlease(vnode_t vp); 695 int vnode_breaklease(vnode_t vp, uint32_t oflags, vfs_context_t ctx); 696 void vnode_breakdirlease(vnode_t vp, bool need_parent, uint32_t oflags); 697 void vnode_revokelease(vnode_t vp, bool locked); 698 #endif /* CONFIG_FILE_LEASES */ 699 700 #define VFS_SMR_DECLARE \ 701 extern smr_t vfs_smr 702 703 #define VFS_SMR() vfs_smr 704 #define vfs_smr_enter() smr_enter(VFS_SMR()) 705 #define vfs_smr_leave() smr_leave(VFS_SMR()) 706 #define vfs_smr_synchronize() smr_synchronize(VFS_SMR()) 707 708 bool vnode_hold_smr(vnode_t); 709 710 #endif /* !_SYS_VNODE_INTERNAL_H_ */ 711