vnode.h revision 106057
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 34 * $FreeBSD: head/sys/sys/vnode.h 106057 2002-10-27 18:07:41Z wollman $ 35 */ 36 37#ifndef _SYS_VNODE_H_ 38#define _SYS_VNODE_H_ 39 40/* 41 * XXX - compatability until lockmgr() goes away or all the #includes are 42 * updated. 43 */ 44#include <sys/lockmgr.h> 45 46#include <sys/queue.h> 47#include <sys/_label.h> 48#include <sys/_lock.h> 49#include <sys/lock.h> 50#include <sys/_mutex.h> 51#include <sys/mutex.h> 52#include <sys/selinfo.h> 53#include <sys/uio.h> 54#include <sys/acl.h> 55#include <sys/ktr.h> 56 57/* 58 * The vnode is the focus of all file activity in UNIX. There is a 59 * unique vnode allocated for each active file, each current directory, 60 * each mounted-on file, text file, and the root. 61 */ 62 63/* 64 * Vnode types. VNON means no type. 65 */ 66enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 67 68/* 69 * Each underlying filesystem allocates its own private area and hangs 70 * it from v_data. If non-null, this area is freed in getnewvnode(). 71 */ 72TAILQ_HEAD(buflists, buf); 73 74typedef int vop_t(void *); 75struct namecache; 76 77struct vpollinfo { 78 struct mtx vpi_lock; /* lock to protect below */ 79 struct selinfo vpi_selinfo; /* identity of poller(s) */ 80 short vpi_events; /* what they are looking for */ 81 short vpi_revents; /* what has happened */ 82}; 83 84/* 85 * Reading or writing any of these items requires holding the appropriate lock. 86 * 87 * Lock reference: 88 * c - namecache mutex 89 * f - freelist mutex 90 * i - interlock 91 * m - mntvnodes mutex 92 * p - pollinfo lock 93 * s - spechash mutex 94 * S - syncer mutex 95 * u - Only a reference to the vnode is needed to read. 96 * v - vnode lock 97 * 98 * XXX Not all fields are locked yet and some fields that are marked are not 99 * locked consistently. This is a work in progress. 100 */ 101 102struct vnode { 103 struct mtx v_interlock; /* lock for "i" things */ 104 u_long v_iflag; /* i vnode flags (see below) */ 105 int v_usecount; /* i ref count of users */ 106 long v_numoutput; /* i writes in progress */ 107 struct thread *v_vxproc; /* i thread owning VXLOCK */ 108 int v_holdcnt; /* i page & buffer references */ 109 struct buflists v_cleanblkhd; /* i SORTED clean blocklist */ 110 struct buf *v_cleanblkroot; /* i clean buf splay tree */ 111 struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */ 112 struct buf *v_dirtyblkroot; /* i dirty buf splay tree */ 113 u_long v_vflag; /* v vnode flags */ 114 int v_writecount; /* v ref count of writers */ 115 struct vm_object *v_object; /* v Place to store VM object */ 116 daddr_t v_lastw; /* v last write (write cluster) */ 117 daddr_t v_cstart; /* v start block of cluster */ 118 daddr_t v_lasta; /* v last allocation (cluster) */ 119 int v_clen; /* v length of current cluster */ 120 union { 121 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 122 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 123 struct { 124 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 125 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 126 } vu_spec; 127 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 128 } v_un; 129 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 130 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 131 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */ 132 enum vtype v_type; /* u vnode type */ 133 const char *v_tag; /* u type of underlying data */ 134 void *v_data; /* u private data for fs */ 135 struct lock v_lock; /* u used if fs don't have one */ 136 struct lock *v_vnlock; /* u pointer to vnode lock */ 137 vop_t **v_op; /* u vnode operations vector */ 138 struct mount *v_mount; /* u ptr to vfs we are in */ 139 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 140 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 141 u_long v_id; /* c capability identifier */ 142 struct vnode *v_dd; /* c .. vnode */ 143 u_long v_ddid; /* c .. capability identifier */ 144 struct vpollinfo *v_pollinfo; /* p Poll events */ 145 struct label v_label; /* MAC label for vnode */ 146#ifdef DEBUG_LOCKS 147 const char *filename; /* Source file doing locking */ 148 int line; /* Line number doing locking */ 149#endif 150 udev_t v_cachedfs; /* cached fs id */ 151 ino_t v_cachedid; /* cached file id */ 152}; 153#define v_mountedhere v_un.vu_mountedhere 154#define v_socket v_un.vu_socket 155#define v_rdev v_un.vu_spec.vu_cdev 156#define v_specnext v_un.vu_spec.vu_specnext 157#define v_fifoinfo v_un.vu_fifoinfo 158 159/* 160 * Userland version of struct vnode, for sysctl. 161 */ 162struct xvnode { 163 size_t xv_size; /* sizeof(struct xvnode) */ 164 void *xv_vnode; /* address of real vnode */ 165 u_long xv_flag; /* vnode vflags */ 166 int xv_usecount; /* reference count of users */ 167 int xv_writecount; /* reference count of writers */ 168 int xv_holdcnt; /* page & buffer references */ 169 u_long xv_id; /* capability identifier */ 170 void *xv_mount; /* address of parent mount */ 171 long xv_numoutput; /* num of writes in progress */ 172 enum vtype xv_type; /* vnode type */ 173 union { 174 void *xvu_socket; /* socket, if VSOCK */ 175 void *xvu_fifo; /* fifo, if VFIFO */ 176 udev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 177 struct { 178 udev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 179 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 180 } xv_uns; 181 } xv_un; 182}; 183#define xv_socket xv_un.xvu_socket 184#define xv_fifo xv_un.xvu_fifo 185#define xv_rdev xv_un.xvu_rdev 186#define xv_dev xv_un.xv_uns.xvu_dev 187#define xv_ino xv_un.xv_uns.xvu_ino 188 189#define VN_POLLEVENT(vp, events) \ 190 do { \ 191 if ((vp)->v_pollinfo != NULL && \ 192 (vp)->v_pollinfo->vpi_events & (events)) \ 193 vn_pollevent((vp), (events)); \ 194 } while (0) 195 196#define VN_KNOTE(vp, b) \ 197 do { \ 198 if ((vp)->v_pollinfo != NULL) \ 199 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 200 } while (0) 201 202/* 203 * Vnode flags. 204 * VI flags are protected by interlock and live in v_iflag 205 * VV flags are protected by the vnode lock and live in v_vflag 206 */ 207#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 208#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 209#define VI_BWAIT 0x0004 /* waiting for output to complete */ 210#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 211#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 212#define VI_MOUNT 0x0020 /* Mount in progress */ 213#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 214#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 215#define VI_FREE 0x0100 /* This vnode is on the freelist */ 216#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 217/* 218 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 219 * in v_synclist. 220 */ 221#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 222 223#define VV_ROOT 0x0001 /* root of its filesystem */ 224#define VV_ISTTY 0x0002 /* vnode represents a tty */ 225#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 226#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 227#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 228#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 229#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 230#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 231#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 232 233/* 234 * Vnode attributes. A field value of VNOVAL represents a field whose value 235 * is unavailable (getattr) or which is not to be changed (setattr). 236 */ 237struct vattr { 238 enum vtype va_type; /* vnode type (for create) */ 239 u_short va_mode; /* files access mode and type */ 240 short va_nlink; /* number of references to file */ 241 uid_t va_uid; /* owner user id */ 242 gid_t va_gid; /* owner group id */ 243 udev_t va_fsid; /* filesystem id */ 244 long va_fileid; /* file id */ 245 u_quad_t va_size; /* file size in bytes */ 246 long va_blocksize; /* blocksize preferred for i/o */ 247 struct timespec va_atime; /* time of last access */ 248 struct timespec va_mtime; /* time of last modification */ 249 struct timespec va_ctime; /* time file changed */ 250 struct timespec va_birthtime; /* time file created */ 251 u_long va_gen; /* generation number of file */ 252 u_long va_flags; /* flags defined for file */ 253 udev_t va_rdev; /* device the special file represents */ 254 u_quad_t va_bytes; /* bytes of disk space held by file */ 255 u_quad_t va_filerev; /* file modification number */ 256 u_int va_vaflags; /* operations flags, see below */ 257 long va_spare; /* remain quad aligned */ 258}; 259 260/* 261 * Flags for va_vaflags. 262 */ 263#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 264#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 265 266/* 267 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 268 * help with write clustering) 269 */ 270#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 271#define IO_APPEND 0x0002 /* append write to end */ 272#define IO_SYNC 0x0004 /* do I/O synchronously */ 273#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 274#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 275#define IO_VMIO 0x0020 /* data already in VMIO space */ 276#define IO_INVAL 0x0040 /* invalidate after I/O */ 277#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 278#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 279#define IO_NOWDRAIN 0x0200 /* do not block on wdrain */ 280#define IO_EXT 0x0400 /* operate on external attributes */ 281#define IO_NORMAL 0x0800 /* operate on regular data */ 282#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 283 284/* 285 * Modes. Some values same as Ixxx entries from inode.h for now. 286 */ 287#define VEXEC 000100 /* execute/search permission */ 288#define VWRITE 000200 /* write permission */ 289#define VREAD 000400 /* read permission */ 290#define VSVTX 001000 /* save swapped text even after use */ 291#define VSGID 002000 /* set group id on execution */ 292#define VSUID 004000 /* set user id on execution */ 293#define VADMIN 010000 /* permission to administer */ 294#define VSTAT 020000 /* permission to retrieve attrs */ 295#define VAPPEND 040000 /* permission to write/append */ 296#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 297 298/* 299 * Token indicating no attribute value yet assigned. 300 */ 301#define VNOVAL (-1) 302 303/* 304 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 305 */ 306#define VLKTIMEOUT (hz / 20 + 1) 307 308#ifdef _KERNEL 309 310#ifdef MALLOC_DECLARE 311MALLOC_DECLARE(M_VNODE); 312#endif 313 314/* 315 * Convert between vnode types and inode formats (since POSIX.1 316 * defines mode word of stat structure in terms of inode formats). 317 */ 318extern enum vtype iftovt_tab[]; 319extern int vttoif_tab[]; 320#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 321#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 322#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 323 324/* 325 * Flags to various vnode functions. 326 */ 327#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 328#define FORCECLOSE 0x0002 /* vflush: force file closure */ 329#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 330#define DOCLOSE 0x0008 /* vclean: close active files */ 331#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 332#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 333#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 334#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 335#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 336#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 337#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 338 339#define VREF(vp) vref(vp) 340 341 342#ifdef DIAGNOSTIC 343#define VATTR_NULL(vap) vattr_null(vap) 344#else 345#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 346#endif /* DIAGNOSTIC */ 347 348#define NULLVP ((struct vnode *)NULL) 349 350#define VNODEOP_SET(f) \ 351 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 352 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 353 354/* 355 * Global vnode data. 356 */ 357extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 358extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 359extern int desiredvnodes; /* number of vnodes desired */ 360extern struct uma_zone *namei_zone; 361extern int prtactive; /* nonzero to call vprint() */ 362extern struct vattr va_null; /* predefined null vattr structure */ 363extern int vfs_ioopt; 364 365/* 366 * Macro/function to check for client cache inconsistency w.r.t. leasing. 367 */ 368#define LEASE_READ 0x1 /* Check lease for readers */ 369#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 370 371 372extern void (*lease_updatetime)(int deltat); 373 374/* Requires interlock */ 375#define VSHOULDFREE(vp) \ 376 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED)) && \ 377 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 378 (!(vp)->v_object || \ 379 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 380 381/* Requires interlock */ 382#define VMIGHTFREE(vp) \ 383 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK)) && \ 384 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 385 386/* Requires interlock */ 387#define VSHOULDBUSY(vp) \ 388 (((vp)->v_iflag & VI_FREE) && \ 389 ((vp)->v_holdcnt || (vp)->v_usecount)) 390 391#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 392#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 393#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 394#define VI_MTX(vp) (&(vp)->v_interlock) 395 396#endif /* _KERNEL */ 397 398 399/* 400 * Mods for extensibility. 401 */ 402 403/* 404 * Flags for vdesc_flags: 405 */ 406#define VDESC_MAX_VPS 16 407/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 408#define VDESC_VP0_WILLRELE 0x0001 409#define VDESC_VP1_WILLRELE 0x0002 410#define VDESC_VP2_WILLRELE 0x0004 411#define VDESC_VP3_WILLRELE 0x0008 412#define VDESC_NOMAP_VPP 0x0100 413#define VDESC_VPP_WILLRELE 0x0200 414 415/* 416 * VDESC_NO_OFFSET is used to identify the end of the offset list 417 * and in places where no such field exists. 418 */ 419#define VDESC_NO_OFFSET -1 420 421/* 422 * This structure describes the vnode operation taking place. 423 */ 424struct vnodeop_desc { 425 int vdesc_offset; /* offset in vector,first for speed */ 426 char *vdesc_name; /* a readable name for debugging */ 427 int vdesc_flags; /* VDESC_* flags */ 428 429 /* 430 * These ops are used by bypass routines to map and locate arguments. 431 * Creds and procs are not needed in bypass routines, but sometimes 432 * they are useful to (for example) transport layers. 433 * Nameidata is useful because it has a cred in it. 434 */ 435 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 436 int vdesc_vpp_offset; /* return vpp location */ 437 int vdesc_cred_offset; /* cred location, if any */ 438 int vdesc_thread_offset; /* thread location, if any */ 439 int vdesc_componentname_offset; /* if any */ 440 /* 441 * Finally, we've got a list of private data (about each operation) 442 * for each transport layer. (Support to manage this list is not 443 * yet part of BSD.) 444 */ 445 caddr_t *vdesc_transports; 446}; 447 448#ifdef _KERNEL 449/* 450 * A list of all the operation descs. 451 */ 452extern struct vnodeop_desc *vnodeop_descs[]; 453 454/* 455 * Interlock for scanning list of vnodes attached to a mountpoint 456 */ 457extern struct mtx mntvnode_mtx; 458 459/* 460 * This macro is very helpful in defining those offsets in the vdesc struct. 461 * 462 * This is stolen from X11R4. I ignored all the fancy stuff for 463 * Crays, so if you decide to port this to such a serious machine, 464 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 465 */ 466#define VOPARG_OFFSET(p_type,field) \ 467 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 468#define VOPARG_OFFSETOF(s_type,field) \ 469 VOPARG_OFFSET(s_type*,field) 470#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 471 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 472 473 474/* 475 * This structure is used to configure the new vnodeops vector. 476 */ 477struct vnodeopv_entry_desc { 478 struct vnodeop_desc *opve_op; /* which operation this is */ 479 vop_t *opve_impl; /* code implementing this operation */ 480}; 481struct vnodeopv_desc { 482 /* ptr to the ptr to the vector where op should go */ 483 vop_t ***opv_desc_vector_p; 484 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 485}; 486 487/* 488 * A generic structure. 489 * This can be used by bypass routines to identify generic arguments. 490 */ 491struct vop_generic_args { 492 struct vnodeop_desc *a_desc; 493 /* other random data follows, presumably */ 494}; 495 496/* 497 * Support code to aid in debugging VFS locking problems. Not totally 498 * reliable since if the thread sleeps between changing the lock 499 * state and checking it with the assert, some other thread could 500 * change the state. They are good enough for debugging a single 501 * filesystem using a single-threaded test. 502 */ 503void assert_vi_locked(struct vnode *vp, char *str); 504void assert_vi_unlocked(struct vnode *vp, char *str); 505void assert_vop_unlocked(struct vnode *vp, char *str); 506void assert_vop_locked(struct vnode *vp, char *str); 507void assert_vop_slocked(struct vnode *vp, char *str); 508void assert_vop_elocked(struct vnode *vp, char *str); 509void assert_vop_elocked_other(struct vnode *vp, char *str); 510 511/* These are called from within the actuall VOPS */ 512void vop_rename_pre(void *a); 513void vop_strategy_pre(void *a); 514void vop_lookup_pre(void *a); 515void vop_lookup_post(void *a, int rc); 516void vop_lock_pre(void *a); 517void vop_lock_post(void *a, int rc); 518void vop_unlock_pre(void *a); 519void vop_unlock_post(void *a, int rc); 520 521#ifdef DEBUG_VFS_LOCKS 522 523#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 524#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 525#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 526#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 527#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 528#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 529#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 530 531#else 532 533#define ASSERT_VOP_LOCKED(vp, str) 534#define ASSERT_VOP_UNLOCKED(vp, str) 535#define ASSERT_VOP_ELOCKED(vp, str) 536#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 537#define ASSERT_VOP_SLOCKED(vp, str) 538#define ASSERT_VI_UNLOCKED(vp, str) 539#define ASSERT_VI_LOCKED(vp, str) 540 541#endif 542 543/* 544 * VOCALL calls an op given an ops vector. We break it out because BSD's 545 * vclean changes the ops vector and then wants to call ops with the old 546 * vector. 547 */ 548#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 549 550/* 551 * This call works for vnodes in the kernel. 552 */ 553#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 554#define VDESC(OP) (& __CONCAT(OP,_desc)) 555#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 556 557/* 558 * VMIO support inline 559 */ 560 561extern int vmiodirenable; 562 563static __inline int 564vn_canvmio(struct vnode *vp) 565{ 566 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 567 return(TRUE); 568 return(FALSE); 569} 570 571/* 572 * Finally, include the default set of vnode operations. 573 */ 574#include "vnode_if.h" 575 576/* 577 * Public vnode manipulation functions. 578 */ 579struct componentname; 580struct file; 581struct mount; 582struct nameidata; 583struct ostat; 584struct thread; 585struct proc; 586struct stat; 587struct nstat; 588struct ucred; 589struct uio; 590struct vattr; 591struct vnode; 592 593extern int (*lease_check_hook)(struct vop_lease_args *); 594extern int (*softdep_fsync_hook)(struct vnode *); 595extern int (*softdep_process_worklist_hook)(struct mount *); 596 597struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 598int bdevvp(dev_t dev, struct vnode **vpp); 599/* cache_* may belong in namei.h. */ 600void cache_enter(struct vnode *dvp, struct vnode *vp, 601 struct componentname *cnp); 602int cache_lookup(struct vnode *dvp, struct vnode **vpp, 603 struct componentname *cnp); 604void cache_purge(struct vnode *vp); 605void cache_purgevfs(struct mount *mp); 606int cache_leaf_test(struct vnode *vp); 607void cvtstat(struct stat *st, struct ostat *ost); 608void cvtnstat(struct stat *sb, struct nstat *nsb); 609int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 610 struct vnode **vpp); 611int lease_check(struct vop_lease_args *ap); 612int spec_vnoperate(struct vop_generic_args *); 613int speedup_syncer(void); 614#define textvp_fullpath(p, rb, rfb) \ 615 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 616int vn_fullpath(struct thread *td, struct vnode *vn, 617 char **retbuf, char **freebuf); 618int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 619 mode_t acc_mode, struct ucred *cred, int *privused); 620int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 621 gid_t file_gid, struct acl *acl, mode_t acc_mode, 622 struct ucred *cred, int *privused); 623void vattr_null(struct vattr *vap); 624int vcount(struct vnode *vp); 625void vdrop(struct vnode *); 626void vdropl(struct vnode *); 627int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 628void vfs_add_vnodeops(const void *); 629void vfs_rm_vnodeops(const void *); 630int vflush(struct mount *mp, int rootrefs, int flags); 631int vget(struct vnode *vp, int lockflag, struct thread *td); 632void vgone(struct vnode *vp); 633void vgonel(struct vnode *vp, struct thread *td); 634void vhold(struct vnode *); 635void vholdl(struct vnode *); 636int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 637 struct thread *td, int slpflag, int slptimeo); 638int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 639 off_t length, int blksize); 640void vprint(char *label, struct vnode *vp); 641int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 642 struct thread *td); 643int vn_close(struct vnode *vp, 644 int flags, struct ucred *file_cred, struct thread *td); 645void vn_finished_write(struct mount *mp); 646int vn_isdisk(struct vnode *vp, int *errp); 647int vn_lock(struct vnode *vp, int flags, struct thread *td); 648#ifdef DEBUG_LOCKS 649int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 650 const char *filename, int line); 651#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 652#endif 653int vn_open(struct nameidata *ndp, int *flagp, int cmode); 654int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 655 struct ucred *cred); 656void vn_pollevent(struct vnode *vp, int events); 657void vn_pollgone(struct vnode *vp); 658int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 659int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 660 int len, off_t offset, enum uio_seg segflg, int ioflg, 661 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 662 struct thread *td); 663int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 664 int len, off_t offset, enum uio_seg segflg, int ioflg, 665 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 666 struct thread *td); 667int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 668 struct ucred *file_cred, struct thread *td); 669int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 670dev_t vn_todev(struct vnode *vp); 671int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 672 int flags); 673int vn_writechk(struct vnode *vp); 674int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 675 const char *attrname, int *buflen, char *buf, struct thread *td); 676int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 677 const char *attrname, int buflen, char *buf, struct thread *td); 678int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 679 const char *attrname, struct thread *td); 680int vfs_cache_lookup(struct vop_lookup_args *ap); 681int vfs_object_create(struct vnode *vp, struct thread *td, 682 struct ucred *cred); 683void vfs_timestamp(struct timespec *); 684void vfs_write_resume(struct mount *mp); 685int vfs_write_suspend(struct mount *mp); 686int vop_stdbmap(struct vop_bmap_args *); 687int vop_stdgetwritemount(struct vop_getwritemount_args *); 688int vop_stdgetpages(struct vop_getpages_args *); 689int vop_stdinactive(struct vop_inactive_args *); 690int vop_stdislocked(struct vop_islocked_args *); 691int vop_stdlock(struct vop_lock_args *); 692int vop_stdputpages(struct vop_putpages_args *); 693int vop_stdunlock(struct vop_unlock_args *); 694int vop_noislocked(struct vop_islocked_args *); 695int vop_nolock(struct vop_lock_args *); 696int vop_nopoll(struct vop_poll_args *); 697int vop_nounlock(struct vop_unlock_args *); 698int vop_stdpathconf(struct vop_pathconf_args *); 699int vop_stdpoll(struct vop_poll_args *); 700int vop_revoke(struct vop_revoke_args *); 701int vop_sharedlock(struct vop_lock_args *); 702int vop_eopnotsupp(struct vop_generic_args *ap); 703int vop_ebadf(struct vop_generic_args *ap); 704int vop_einval(struct vop_generic_args *ap); 705int vop_enotty(struct vop_generic_args *ap); 706int vop_defaultop(struct vop_generic_args *ap); 707int vop_null(struct vop_generic_args *ap); 708int vop_panic(struct vop_generic_args *ap); 709int vop_stdcreatevobject(struct vop_createvobject_args *ap); 710int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 711int vop_stdgetvobject(struct vop_getvobject_args *ap); 712 713void vfree(struct vnode *); 714void vput(struct vnode *vp); 715void vrele(struct vnode *vp); 716void vref(struct vnode *vp); 717int vrefcnt(struct vnode *vp); 718void vbusy(struct vnode *vp); 719void v_addpollinfo(struct vnode *vp); 720 721extern vop_t **default_vnodeop_p; 722extern vop_t **spec_vnodeop_p; 723extern vop_t **dead_vnodeop_p; 724 725#endif /* _KERNEL */ 726 727#endif /* !_SYS_VNODE_H_ */ 728