vnode.h revision 108356
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 108356 2002-12-28 20:28:10Z dillon $ 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#define IO_SEQMAX 0x7F /* seq heuristic max value */ 285#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 286 287/* 288 * Modes. Some values same as Ixxx entries from inode.h for now. 289 */ 290#define VEXEC 000100 /* execute/search permission */ 291#define VWRITE 000200 /* write permission */ 292#define VREAD 000400 /* read permission */ 293#define VSVTX 001000 /* save swapped text even after use */ 294#define VSGID 002000 /* set group id on execution */ 295#define VSUID 004000 /* set user id on execution */ 296#define VADMIN 010000 /* permission to administer */ 297#define VSTAT 020000 /* permission to retrieve attrs */ 298#define VAPPEND 040000 /* permission to write/append */ 299#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 300 301/* 302 * Token indicating no attribute value yet assigned. 303 */ 304#define VNOVAL (-1) 305 306/* 307 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 308 */ 309#define VLKTIMEOUT (hz / 20 + 1) 310 311#ifdef _KERNEL 312 313#ifdef MALLOC_DECLARE 314MALLOC_DECLARE(M_VNODE); 315#endif 316 317/* 318 * Convert between vnode types and inode formats (since POSIX.1 319 * defines mode word of stat structure in terms of inode formats). 320 */ 321extern enum vtype iftovt_tab[]; 322extern int vttoif_tab[]; 323#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 324#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 325#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 326 327/* 328 * Flags to various vnode functions. 329 */ 330#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 331#define FORCECLOSE 0x0002 /* vflush: force file closure */ 332#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 333#define DOCLOSE 0x0008 /* vclean: close active files */ 334#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 335#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 336#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 337#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 338#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 339#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 340#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 341 342#define VREF(vp) vref(vp) 343 344 345#ifdef DIAGNOSTIC 346#define VATTR_NULL(vap) vattr_null(vap) 347#else 348#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 349#endif /* DIAGNOSTIC */ 350 351#define NULLVP ((struct vnode *)NULL) 352 353#define VNODEOP_SET(f) \ 354 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 355 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 356 357/* 358 * Global vnode data. 359 */ 360extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 361extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 362extern int desiredvnodes; /* number of vnodes desired */ 363extern struct uma_zone *namei_zone; 364extern int prtactive; /* nonzero to call vprint() */ 365extern struct vattr va_null; /* predefined null vattr structure */ 366extern int vfs_ioopt; 367 368/* 369 * Macro/function to check for client cache inconsistency w.r.t. leasing. 370 */ 371#define LEASE_READ 0x1 /* Check lease for readers */ 372#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 373 374 375extern void (*lease_updatetime)(int deltat); 376 377/* Requires interlock */ 378#define VSHOULDFREE(vp) \ 379 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED)) && \ 380 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 381 (!(vp)->v_object || \ 382 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 383 384/* Requires interlock */ 385#define VMIGHTFREE(vp) \ 386 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK)) && \ 387 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 388 389/* Requires interlock */ 390#define VSHOULDBUSY(vp) \ 391 (((vp)->v_iflag & VI_FREE) && \ 392 ((vp)->v_holdcnt || (vp)->v_usecount)) 393 394#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 395#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 396#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 397#define VI_MTX(vp) (&(vp)->v_interlock) 398 399#endif /* _KERNEL */ 400 401 402/* 403 * Mods for extensibility. 404 */ 405 406/* 407 * Flags for vdesc_flags: 408 */ 409#define VDESC_MAX_VPS 16 410/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 411#define VDESC_VP0_WILLRELE 0x0001 412#define VDESC_VP1_WILLRELE 0x0002 413#define VDESC_VP2_WILLRELE 0x0004 414#define VDESC_VP3_WILLRELE 0x0008 415#define VDESC_NOMAP_VPP 0x0100 416#define VDESC_VPP_WILLRELE 0x0200 417 418/* 419 * VDESC_NO_OFFSET is used to identify the end of the offset list 420 * and in places where no such field exists. 421 */ 422#define VDESC_NO_OFFSET -1 423 424/* 425 * This structure describes the vnode operation taking place. 426 */ 427struct vnodeop_desc { 428 int vdesc_offset; /* offset in vector,first for speed */ 429 char *vdesc_name; /* a readable name for debugging */ 430 int vdesc_flags; /* VDESC_* flags */ 431 432 /* 433 * These ops are used by bypass routines to map and locate arguments. 434 * Creds and procs are not needed in bypass routines, but sometimes 435 * they are useful to (for example) transport layers. 436 * Nameidata is useful because it has a cred in it. 437 */ 438 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 439 int vdesc_vpp_offset; /* return vpp location */ 440 int vdesc_cred_offset; /* cred location, if any */ 441 int vdesc_thread_offset; /* thread location, if any */ 442 int vdesc_componentname_offset; /* if any */ 443 /* 444 * Finally, we've got a list of private data (about each operation) 445 * for each transport layer. (Support to manage this list is not 446 * yet part of BSD.) 447 */ 448 caddr_t *vdesc_transports; 449}; 450 451#ifdef _KERNEL 452/* 453 * A list of all the operation descs. 454 */ 455extern struct vnodeop_desc *vnodeop_descs[]; 456 457/* 458 * Interlock for scanning list of vnodes attached to a mountpoint 459 */ 460extern struct mtx mntvnode_mtx; 461 462/* 463 * This macro is very helpful in defining those offsets in the vdesc struct. 464 * 465 * This is stolen from X11R4. I ignored all the fancy stuff for 466 * Crays, so if you decide to port this to such a serious machine, 467 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 468 */ 469#define VOPARG_OFFSET(p_type,field) \ 470 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 471#define VOPARG_OFFSETOF(s_type,field) \ 472 VOPARG_OFFSET(s_type*,field) 473#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 474 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 475 476 477/* 478 * This structure is used to configure the new vnodeops vector. 479 */ 480struct vnodeopv_entry_desc { 481 struct vnodeop_desc *opve_op; /* which operation this is */ 482 vop_t *opve_impl; /* code implementing this operation */ 483}; 484struct vnodeopv_desc { 485 /* ptr to the ptr to the vector where op should go */ 486 vop_t ***opv_desc_vector_p; 487 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 488}; 489 490/* 491 * A generic structure. 492 * This can be used by bypass routines to identify generic arguments. 493 */ 494struct vop_generic_args { 495 struct vnodeop_desc *a_desc; 496 /* other random data follows, presumably */ 497}; 498 499/* 500 * Support code to aid in debugging VFS locking problems. Not totally 501 * reliable since if the thread sleeps between changing the lock 502 * state and checking it with the assert, some other thread could 503 * change the state. They are good enough for debugging a single 504 * filesystem using a single-threaded test. 505 */ 506void assert_vi_locked(struct vnode *vp, char *str); 507void assert_vi_unlocked(struct vnode *vp, char *str); 508void assert_vop_unlocked(struct vnode *vp, char *str); 509void assert_vop_locked(struct vnode *vp, char *str); 510void assert_vop_slocked(struct vnode *vp, char *str); 511void assert_vop_elocked(struct vnode *vp, char *str); 512void assert_vop_elocked_other(struct vnode *vp, char *str); 513 514/* These are called from within the actuall VOPS */ 515void vop_rename_pre(void *a); 516void vop_strategy_pre(void *a); 517void vop_lookup_pre(void *a); 518void vop_lookup_post(void *a, int rc); 519void vop_lock_pre(void *a); 520void vop_lock_post(void *a, int rc); 521void vop_unlock_pre(void *a); 522void vop_unlock_post(void *a, int rc); 523 524#ifdef DEBUG_VFS_LOCKS 525 526#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 527#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 528#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 529#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 530#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 531#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 532#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 533 534#else 535 536#define ASSERT_VOP_LOCKED(vp, str) 537#define ASSERT_VOP_UNLOCKED(vp, str) 538#define ASSERT_VOP_ELOCKED(vp, str) 539#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 540#define ASSERT_VOP_SLOCKED(vp, str) 541#define ASSERT_VI_UNLOCKED(vp, str) 542#define ASSERT_VI_LOCKED(vp, str) 543 544#endif 545 546/* 547 * VOCALL calls an op given an ops vector. We break it out because BSD's 548 * vclean changes the ops vector and then wants to call ops with the old 549 * vector. 550 */ 551#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 552 553/* 554 * This call works for vnodes in the kernel. 555 */ 556#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 557#define VDESC(OP) (& __CONCAT(OP,_desc)) 558#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 559 560/* 561 * VMIO support inline 562 */ 563 564extern int vmiodirenable; 565 566static __inline int 567vn_canvmio(struct vnode *vp) 568{ 569 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 570 return(TRUE); 571 return(FALSE); 572} 573 574/* 575 * Finally, include the default set of vnode operations. 576 */ 577#include "vnode_if.h" 578 579/* 580 * Public vnode manipulation functions. 581 */ 582struct componentname; 583struct file; 584struct mount; 585struct nameidata; 586struct ostat; 587struct thread; 588struct proc; 589struct stat; 590struct nstat; 591struct ucred; 592struct uio; 593struct vattr; 594struct vnode; 595 596extern int (*lease_check_hook)(struct vop_lease_args *); 597extern int (*softdep_fsync_hook)(struct vnode *); 598extern int (*softdep_process_worklist_hook)(struct mount *); 599 600struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 601int bdevvp(dev_t dev, struct vnode **vpp); 602/* cache_* may belong in namei.h. */ 603void cache_enter(struct vnode *dvp, struct vnode *vp, 604 struct componentname *cnp); 605int cache_lookup(struct vnode *dvp, struct vnode **vpp, 606 struct componentname *cnp); 607void cache_purge(struct vnode *vp); 608void cache_purgevfs(struct mount *mp); 609int cache_leaf_test(struct vnode *vp); 610void cvtstat(struct stat *st, struct ostat *ost); 611void cvtnstat(struct stat *sb, struct nstat *nsb); 612int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 613 struct vnode **vpp); 614int lease_check(struct vop_lease_args *ap); 615int spec_vnoperate(struct vop_generic_args *); 616int speedup_syncer(void); 617#define textvp_fullpath(p, rb, rfb) \ 618 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 619int vn_fullpath(struct thread *td, struct vnode *vn, 620 char **retbuf, char **freebuf); 621int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 622 mode_t acc_mode, struct ucred *cred, int *privused); 623int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 624 gid_t file_gid, struct acl *acl, mode_t acc_mode, 625 struct ucred *cred, int *privused); 626void vattr_null(struct vattr *vap); 627int vcount(struct vnode *vp); 628void vdrop(struct vnode *); 629void vdropl(struct vnode *); 630int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 631void vfs_add_vnodeops(const void *); 632void vfs_rm_vnodeops(const void *); 633int vflush(struct mount *mp, int rootrefs, int flags); 634int vget(struct vnode *vp, int lockflag, struct thread *td); 635void vgone(struct vnode *vp); 636void vgonel(struct vnode *vp, struct thread *td); 637void vhold(struct vnode *); 638void vholdl(struct vnode *); 639int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 640 struct thread *td, int slpflag, int slptimeo); 641int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 642 off_t length, int blksize); 643void vprint(char *label, struct vnode *vp); 644int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 645 struct thread *td); 646int vn_close(struct vnode *vp, 647 int flags, struct ucred *file_cred, struct thread *td); 648void vn_finished_write(struct mount *mp); 649int vn_isdisk(struct vnode *vp, int *errp); 650int vn_lock(struct vnode *vp, int flags, struct thread *td); 651#ifdef DEBUG_LOCKS 652int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 653 const char *filename, int line); 654#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 655#endif 656int vn_open(struct nameidata *ndp, int *flagp, int cmode); 657int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 658 struct ucred *cred); 659void vn_pollevent(struct vnode *vp, int events); 660void vn_pollgone(struct vnode *vp); 661int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 662int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 663 int len, off_t offset, enum uio_seg segflg, int ioflg, 664 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 665 struct thread *td); 666int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 667 int len, off_t offset, enum uio_seg segflg, int ioflg, 668 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 669 struct thread *td); 670int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 671 struct ucred *file_cred, struct thread *td); 672int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 673dev_t vn_todev(struct vnode *vp); 674int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 675 int flags); 676int vn_writechk(struct vnode *vp); 677int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 678 const char *attrname, int *buflen, char *buf, struct thread *td); 679int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 680 const char *attrname, int buflen, char *buf, struct thread *td); 681int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 682 const char *attrname, struct thread *td); 683int vfs_cache_lookup(struct vop_lookup_args *ap); 684int vfs_object_create(struct vnode *vp, struct thread *td, 685 struct ucred *cred); 686void vfs_timestamp(struct timespec *); 687void vfs_write_resume(struct mount *mp); 688int vfs_write_suspend(struct mount *mp); 689int vop_stdbmap(struct vop_bmap_args *); 690int vop_stdgetwritemount(struct vop_getwritemount_args *); 691int vop_stdgetpages(struct vop_getpages_args *); 692int vop_stdinactive(struct vop_inactive_args *); 693int vop_stdislocked(struct vop_islocked_args *); 694int vop_stdlock(struct vop_lock_args *); 695int vop_stdputpages(struct vop_putpages_args *); 696int vop_stdunlock(struct vop_unlock_args *); 697int vop_noislocked(struct vop_islocked_args *); 698int vop_nolock(struct vop_lock_args *); 699int vop_nopoll(struct vop_poll_args *); 700int vop_nounlock(struct vop_unlock_args *); 701int vop_stdpathconf(struct vop_pathconf_args *); 702int vop_stdpoll(struct vop_poll_args *); 703int vop_revoke(struct vop_revoke_args *); 704int vop_sharedlock(struct vop_lock_args *); 705int vop_eopnotsupp(struct vop_generic_args *ap); 706int vop_ebadf(struct vop_generic_args *ap); 707int vop_einval(struct vop_generic_args *ap); 708int vop_enotty(struct vop_generic_args *ap); 709int vop_defaultop(struct vop_generic_args *ap); 710int vop_null(struct vop_generic_args *ap); 711int vop_panic(struct vop_generic_args *ap); 712int vop_stdcreatevobject(struct vop_createvobject_args *ap); 713int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 714int vop_stdgetvobject(struct vop_getvobject_args *ap); 715 716void vfree(struct vnode *); 717void vput(struct vnode *vp); 718void vrele(struct vnode *vp); 719void vref(struct vnode *vp); 720int vrefcnt(struct vnode *vp); 721void vbusy(struct vnode *vp); 722void v_addpollinfo(struct vnode *vp); 723 724extern vop_t **default_vnodeop_p; 725extern vop_t **spec_vnodeop_p; 726extern vop_t **dead_vnodeop_p; 727 728#endif /* _KERNEL */ 729 730#endif /* !_SYS_VNODE_H_ */ 731