vnode.h revision 127592
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 127592 2004-03-29 22:41:21Z peter $ 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/_lock.h> 48#include <sys/lock.h> 49#include <sys/_mutex.h> 50#include <sys/mutex.h> 51#include <sys/selinfo.h> 52#include <sys/uio.h> 53#include <sys/acl.h> 54#include <sys/ktr.h> 55 56/* 57 * The vnode is the focus of all file activity in UNIX. There is a 58 * unique vnode allocated for each active file, each current directory, 59 * each mounted-on file, text file, and the root. 60 */ 61 62/* 63 * Vnode types. VNON means no type. 64 */ 65enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 66 67/* 68 * Each underlying filesystem allocates its own private area and hangs 69 * it from v_data. If non-null, this area is freed in getnewvnode(). 70 */ 71TAILQ_HEAD(buflists, buf); 72 73typedef int vop_t(void *); 74struct namecache; 75 76struct vpollinfo { 77 struct mtx vpi_lock; /* lock to protect below */ 78 struct selinfo vpi_selinfo; /* identity of poller(s) */ 79 short vpi_events; /* what they are looking for */ 80 short vpi_revents; /* what has happened */ 81}; 82 83/* 84 * Reading or writing any of these items requires holding the appropriate lock. 85 * 86 * Lock reference: 87 * c - namecache mutex 88 * f - freelist mutex 89 * i - interlock 90 * m - mntvnodes mutex 91 * p - pollinfo lock 92 * s - spechash mutex 93 * S - syncer mutex 94 * u - Only a reference to the vnode is needed to read. 95 * v - vnode lock 96 * 97 * Vnodes may be found on many lists. The general way to deal with operating 98 * on a vnode that is on a list is: 99 * 1) Lock the list and find the vnode. 100 * 2) Lock interlock so that the vnode does not go away. 101 * 3) Unlock the list to avoid lock order reversals. 102 * 4) vget with LK_INTERLOCK and check for ENOENT, or 103 * 5) Check for XLOCK if the vnode lock is not required. 104 * 6) Perform your operation, then vput(). 105 * 106 * XXX Not all fields are locked yet and some fields that are marked are not 107 * locked consistently. This is a work in progress. Requires Giant! 108 */ 109 110struct vnode { 111 struct mtx v_interlock; /* lock for "i" things */ 112 u_long v_iflag; /* i vnode flags (see below) */ 113 int v_usecount; /* i ref count of users */ 114 long v_numoutput; /* i writes in progress */ 115 struct thread *v_vxthread; /* i thread owning VXLOCK */ 116 int v_holdcnt; /* i page & buffer references */ 117 struct buflists v_cleanblkhd; /* i SORTED clean blocklist */ 118 struct buf *v_cleanblkroot; /* i clean buf splay tree */ 119 int v_cleanbufcnt; /* i number of clean buffers */ 120 struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */ 121 struct buf *v_dirtyblkroot; /* i dirty buf splay tree */ 122 int v_dirtybufcnt; /* i number of dirty buffers */ 123 u_long v_vflag; /* v vnode flags */ 124 int v_writecount; /* v ref count of writers */ 125 struct vm_object *v_object; /* v Place to store VM object */ 126 daddr_t v_lastw; /* v last write (write cluster) */ 127 daddr_t v_cstart; /* v start block of cluster */ 128 daddr_t v_lasta; /* v last allocation (cluster) */ 129 int v_clen; /* v length of current cluster */ 130 union { 131 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 132 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 133 struct { 134 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 135 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 136 } vu_spec; 137 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 138 } v_un; 139 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 140 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 141 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */ 142 enum vtype v_type; /* u vnode type */ 143 const char *v_tag; /* u type of underlying data */ 144 void *v_data; /* u private data for fs */ 145 struct lock v_lock; /* u used if fs don't have one */ 146 struct lock *v_vnlock; /* u pointer to vnode lock */ 147 vop_t **v_op; /* u vnode operations vector */ 148 struct mount *v_mount; /* u ptr to vfs we are in */ 149 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 150 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 151 u_long v_id; /* c capability identifier */ 152 struct vnode *v_dd; /* c .. vnode */ 153 u_long v_ddid; /* c .. capability identifier */ 154 struct vpollinfo *v_pollinfo; /* p Poll events */ 155 struct label *v_label; /* MAC label for vnode */ 156#ifdef DEBUG_LOCKS 157 const char *filename; /* Source file doing locking */ 158 int line; /* Line number doing locking */ 159#endif 160 udev_t v_cachedfs; /* cached fs id */ 161 ino_t v_cachedid; /* cached file id */ 162}; 163#define v_mountedhere v_un.vu_mountedhere 164#define v_socket v_un.vu_socket 165#define v_rdev v_un.vu_spec.vu_cdev 166#define v_specnext v_un.vu_spec.vu_specnext 167#define v_fifoinfo v_un.vu_fifoinfo 168 169/* 170 * Userland version of struct vnode, for sysctl. 171 */ 172struct xvnode { 173 size_t xv_size; /* sizeof(struct xvnode) */ 174 void *xv_vnode; /* address of real vnode */ 175 u_long xv_flag; /* vnode vflags */ 176 int xv_usecount; /* reference count of users */ 177 int xv_writecount; /* reference count of writers */ 178 int xv_holdcnt; /* page & buffer references */ 179 u_long xv_id; /* capability identifier */ 180 void *xv_mount; /* address of parent mount */ 181 long xv_numoutput; /* num of writes in progress */ 182 enum vtype xv_type; /* vnode type */ 183 union { 184 void *xvu_socket; /* socket, if VSOCK */ 185 void *xvu_fifo; /* fifo, if VFIFO */ 186 udev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 187 struct { 188 udev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 189 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 190 } xv_uns; 191 } xv_un; 192}; 193#define xv_socket xv_un.xvu_socket 194#define xv_fifo xv_un.xvu_fifo 195#define xv_rdev xv_un.xvu_rdev 196#define xv_dev xv_un.xv_uns.xvu_dev 197#define xv_ino xv_un.xv_uns.xvu_ino 198 199#define VN_POLLEVENT(vp, events) \ 200 do { \ 201 if ((vp)->v_pollinfo != NULL && \ 202 (vp)->v_pollinfo->vpi_events & (events)) \ 203 vn_pollevent((vp), (events)); \ 204 } while (0) 205 206#define VN_KNOTE(vp, b) \ 207 do { \ 208 if ((vp)->v_pollinfo != NULL) \ 209 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 210 } while (0) 211 212/* 213 * Vnode flags. 214 * VI flags are protected by interlock and live in v_iflag 215 * VV flags are protected by the vnode lock and live in v_vflag 216 */ 217#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 218#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 219#define VI_BWAIT 0x0004 /* waiting for output to complete */ 220#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 221#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 222#define VI_MOUNT 0x0020 /* Mount in progress */ 223#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 224#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 225#define VI_FREE 0x0100 /* This vnode is on the freelist */ 226#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 227#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 228/* 229 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 230 * in v_synclist. 231 */ 232#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 233 234#define VV_ROOT 0x0001 /* root of its filesystem */ 235#define VV_ISTTY 0x0002 /* vnode represents a tty */ 236#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 237#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 238#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 239#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 240#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 241#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 242#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 243 244/* 245 * Vnode attributes. A field value of VNOVAL represents a field whose value 246 * is unavailable (getattr) or which is not to be changed (setattr). 247 */ 248struct vattr { 249 enum vtype va_type; /* vnode type (for create) */ 250 u_short va_mode; /* files access mode and type */ 251 short va_nlink; /* number of references to file */ 252 uid_t va_uid; /* owner user id */ 253 gid_t va_gid; /* owner group id */ 254 udev_t va_fsid; /* filesystem id */ 255 long va_fileid; /* file id */ 256 u_quad_t va_size; /* file size in bytes */ 257 long va_blocksize; /* blocksize preferred for i/o */ 258 struct timespec va_atime; /* time of last access */ 259 struct timespec va_mtime; /* time of last modification */ 260 struct timespec va_ctime; /* time file changed */ 261 struct timespec va_birthtime; /* time file created */ 262 u_long va_gen; /* generation number of file */ 263 u_long va_flags; /* flags defined for file */ 264 udev_t va_rdev; /* device the special file represents */ 265 u_quad_t va_bytes; /* bytes of disk space held by file */ 266 u_quad_t va_filerev; /* file modification number */ 267 u_int va_vaflags; /* operations flags, see below */ 268 long va_spare; /* remain quad aligned */ 269}; 270 271/* 272 * Flags for va_vaflags. 273 */ 274#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 275#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 276 277/* 278 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 279 * help with write clustering) 280 */ 281#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 282#define IO_APPEND 0x0002 /* append write to end */ 283#define IO_SYNC 0x0004 /* do I/O synchronously */ 284#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 285#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 286#define IO_VMIO 0x0020 /* data already in VMIO space */ 287#define IO_INVAL 0x0040 /* invalidate after I/O */ 288#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 289#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 290#define IO_EXT 0x0400 /* operate on external attributes */ 291#define IO_NORMAL 0x0800 /* operate on regular data */ 292#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 293 294#define IO_SEQMAX 0x7F /* seq heuristic max value */ 295#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 296 297/* 298 * Modes. Some values same as Ixxx entries from inode.h for now. 299 */ 300#define VEXEC 000100 /* execute/search permission */ 301#define VWRITE 000200 /* write permission */ 302#define VREAD 000400 /* read permission */ 303#define VSVTX 001000 /* save swapped text even after use */ 304#define VSGID 002000 /* set group id on execution */ 305#define VSUID 004000 /* set user id on execution */ 306#define VADMIN 010000 /* permission to administer */ 307#define VSTAT 020000 /* permission to retrieve attrs */ 308#define VAPPEND 040000 /* permission to write/append */ 309#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 310 311/* 312 * Token indicating no attribute value yet assigned. 313 */ 314#define VNOVAL (-1) 315 316/* 317 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 318 */ 319#define VLKTIMEOUT (hz / 20 + 1) 320 321#ifdef _KERNEL 322 323#ifdef MALLOC_DECLARE 324MALLOC_DECLARE(M_VNODE); 325#endif 326 327/* 328 * Convert between vnode types and inode formats (since POSIX.1 329 * defines mode word of stat structure in terms of inode formats). 330 */ 331extern enum vtype iftovt_tab[]; 332extern int vttoif_tab[]; 333#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 334#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 335#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 336 337/* 338 * Flags to various vnode functions. 339 */ 340#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 341#define FORCECLOSE 0x0002 /* vflush: force file closure */ 342#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 343#define DOCLOSE 0x0008 /* vclean: close active files */ 344#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 345#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 346#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 347#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 348#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 349#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 350#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 351 352#define VREF(vp) vref(vp) 353 354#ifdef DIAGNOSTIC 355#define VATTR_NULL(vap) vattr_null(vap) 356#else 357#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 358#endif /* DIAGNOSTIC */ 359 360#define NULLVP ((struct vnode *)NULL) 361 362#define VNODEOP_SET(f) \ 363 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 364 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 365 366/* 367 * Global vnode data. 368 */ 369extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 370extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 371extern int desiredvnodes; /* number of vnodes desired */ 372extern struct uma_zone *namei_zone; 373extern int prtactive; /* nonzero to call vprint() */ 374extern struct vattr va_null; /* predefined null vattr structure */ 375 376/* 377 * Macro/function to check for client cache inconsistency w.r.t. leasing. 378 */ 379#define LEASE_READ 0x1 /* Check lease for readers */ 380#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 381 382extern void (*lease_updatetime)(int deltat); 383 384/* Requires interlock. */ 385#define VSHOULDFREE(vp) \ 386 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 387 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 388 (!(vp)->v_object || \ 389 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 390 391/* Requires interlock. */ 392#define VMIGHTFREE(vp) \ 393 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 394 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 395 396/* Requires interlock. */ 397#define VSHOULDBUSY(vp) \ 398 (((vp)->v_iflag & VI_FREE) && \ 399 ((vp)->v_holdcnt || (vp)->v_usecount)) 400 401#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 402#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 403#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 404#define VI_MTX(vp) (&(vp)->v_interlock) 405 406#endif /* _KERNEL */ 407 408/* 409 * Mods for extensibility. 410 */ 411 412/* 413 * Flags for vdesc_flags: 414 */ 415#define VDESC_MAX_VPS 16 416/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 417#define VDESC_VP0_WILLRELE 0x0001 418#define VDESC_VP1_WILLRELE 0x0002 419#define VDESC_VP2_WILLRELE 0x0004 420#define VDESC_VP3_WILLRELE 0x0008 421#define VDESC_NOMAP_VPP 0x0100 422#define VDESC_VPP_WILLRELE 0x0200 423 424/* 425 * VDESC_NO_OFFSET is used to identify the end of the offset list 426 * and in places where no such field exists. 427 */ 428#define VDESC_NO_OFFSET -1 429 430/* 431 * This structure describes the vnode operation taking place. 432 */ 433struct vnodeop_desc { 434 int vdesc_offset; /* offset in vector,first for speed */ 435 char *vdesc_name; /* a readable name for debugging */ 436 int vdesc_flags; /* VDESC_* flags */ 437 438 /* 439 * These ops are used by bypass routines to map and locate arguments. 440 * Creds and procs are not needed in bypass routines, but sometimes 441 * they are useful to (for example) transport layers. 442 * Nameidata is useful because it has a cred in it. 443 */ 444 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 445 int vdesc_vpp_offset; /* return vpp location */ 446 int vdesc_cred_offset; /* cred location, if any */ 447 int vdesc_thread_offset; /* thread location, if any */ 448 int vdesc_componentname_offset; /* if any */ 449 /* 450 * Finally, we've got a list of private data (about each operation) 451 * for each transport layer. (Support to manage this list is not 452 * yet part of BSD.) 453 */ 454 caddr_t *vdesc_transports; 455}; 456 457#ifdef _KERNEL 458/* 459 * A list of all the operation descs. 460 */ 461extern struct vnodeop_desc *vnodeop_descs[]; 462 463#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 464#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 465 ((s_type)(((char*)(struct_p)) + (s_offset))) 466 467/* 468 * This structure is used to configure the new vnodeops vector. 469 */ 470struct vnodeopv_entry_desc { 471 struct vnodeop_desc *opve_op; /* which operation this is */ 472 vop_t *opve_impl; /* code implementing this operation */ 473}; 474struct vnodeopv_desc { 475 /* ptr to the ptr to the vector where op should go */ 476 vop_t ***opv_desc_vector_p; 477 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 478}; 479 480/* 481 * A generic structure. 482 * This can be used by bypass routines to identify generic arguments. 483 */ 484struct vop_generic_args { 485 struct vnodeop_desc *a_desc; 486 /* other random data follows, presumably */ 487}; 488 489#ifdef DEBUG_VFS_LOCKS 490/* 491 * Support code to aid in debugging VFS locking problems. Not totally 492 * reliable since if the thread sleeps between changing the lock 493 * state and checking it with the assert, some other thread could 494 * change the state. They are good enough for debugging a single 495 * filesystem using a single-threaded test. 496 */ 497void assert_vi_locked(struct vnode *vp, const char *str); 498void assert_vi_unlocked(struct vnode *vp, const char *str); 499#if 0 500void assert_vop_elocked(struct vnode *vp, const char *str); 501void assert_vop_elocked_other(struct vnode *vp, const char *str); 502#endif 503void assert_vop_locked(struct vnode *vp, const char *str); 504#if 0 505voi0 assert_vop_slocked(struct vnode *vp, const char *str); 506#endif 507void assert_vop_unlocked(struct vnode *vp, const char *str); 508 509/* These are called from within the actual VOPS. */ 510void vop_lock_pre(void *a); 511void vop_lock_post(void *a, int rc); 512void vop_lookup_post(void *a, int rc); 513void vop_lookup_pre(void *a); 514void vop_rename_pre(void *a); 515void vop_strategy_pre(void *a); 516void vop_unlock_post(void *a, int rc); 517void vop_unlock_pre(void *a); 518 519#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 520#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 521#if 0 522#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 523#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 524#endif 525#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 526#if 0 527#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 528#endif 529#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 530 531#else /* !DEBUG_VFS_LOCKS */ 532 533#define ASSERT_VI_LOCKED(vp, str) 534#define ASSERT_VI_UNLOCKED(vp, str) 535#if 0 536#define ASSERT_VOP_ELOCKED(vp, str) 537#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 538#endif 539#define ASSERT_VOP_LOCKED(vp, str) 540#if 0 541#define ASSERT_VOP_SLOCKED(vp, str) 542#endif 543#define ASSERT_VOP_UNLOCKED(vp, str) 544#endif /* DEBUG_VFS_LOCKS */ 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); 610int change_dir(struct vnode *vp, struct thread *td); 611int change_root(struct vnode *vp, struct thread *td); 612void cvtstat(struct stat *st, struct ostat *ost); 613void cvtnstat(struct stat *sb, struct nstat *nsb); 614int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 615 struct vnode **vpp); 616int lease_check(struct vop_lease_args *ap); 617int spec_vnoperate(struct vop_generic_args *); 618int speedup_syncer(void); 619#define textvp_fullpath(p, rb, rfb) \ 620 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 621int vn_fullpath(struct thread *td, struct vnode *vn, 622 char **retbuf, char **freebuf); 623int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 624 mode_t acc_mode, struct ucred *cred, int *privused); 625int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 626 gid_t file_gid, struct acl *acl, mode_t acc_mode, 627 struct ucred *cred, int *privused); 628void vattr_null(struct vattr *vap); 629int vcount(struct vnode *vp); 630void vdrop(struct vnode *); 631void vdropl(struct vnode *); 632int vfinddev(dev_t dev, struct vnode **vpp); 633void vfs_add_vnodeops(const void *); 634void vfs_rm_vnodeops(const void *); 635int vflush(struct mount *mp, int rootrefs, int flags); 636int vget(struct vnode *vp, int lockflag, struct thread *td); 637void vgone(struct vnode *vp); 638void vgonel(struct vnode *vp, struct thread *td); 639void vhold(struct vnode *); 640void vholdl(struct vnode *); 641int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 642 struct thread *td, int slpflag, int slptimeo); 643int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 644 off_t length, int blksize); 645void vprint(char *label, struct vnode *vp); 646int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 647 struct thread *td); 648int vn_close(struct vnode *vp, 649 int flags, struct ucred *file_cred, struct thread *td); 650void vn_finished_write(struct mount *mp); 651int vn_isdisk(struct vnode *vp, int *errp); 652int vn_lock(struct vnode *vp, int flags, struct thread *td); 653#ifdef DEBUG_LOCKS 654int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 655 const char *filename, int line); 656#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 657#endif 658int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 659int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 660 struct ucred *cred, int fdidx); 661void vn_pollevent(struct vnode *vp, int events); 662void vn_pollgone(struct vnode *vp); 663int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 664int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 665 int len, off_t offset, enum uio_seg segflg, int ioflg, 666 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 667 struct thread *td); 668int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 669 int len, off_t offset, enum uio_seg segflg, int ioflg, 670 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 671 struct thread *td); 672int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 673 struct ucred *file_cred, struct thread *td); 674int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 675dev_t vn_todev(struct vnode *vp); 676int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 677 int flags); 678int vn_writechk(struct vnode *vp); 679int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 680 const char *attrname, int *buflen, char *buf, struct thread *td); 681int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 682 const char *attrname, int buflen, char *buf, struct thread *td); 683int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 684 const char *attrname, struct thread *td); 685int vfs_cache_lookup(struct vop_lookup_args *ap); 686int vfs_object_create(struct vnode *vp, struct thread *td, 687 struct ucred *cred); 688void vfs_timestamp(struct timespec *); 689void vfs_write_resume(struct mount *mp); 690int vfs_write_suspend(struct mount *mp); 691int vop_stdbmap(struct vop_bmap_args *); 692int vop_stdfsync(struct vop_fsync_args *); 693int vop_stdgetwritemount(struct vop_getwritemount_args *); 694int vop_stdgetpages(struct vop_getpages_args *); 695int vop_stdinactive(struct vop_inactive_args *); 696int vop_stdislocked(struct vop_islocked_args *); 697int vop_stdlock(struct vop_lock_args *); 698int vop_stdputpages(struct vop_putpages_args *); 699int vop_stdunlock(struct vop_unlock_args *); 700int vop_nopoll(struct vop_poll_args *); 701int vop_stdpathconf(struct vop_pathconf_args *); 702int vop_stdpoll(struct vop_poll_args *); 703int vop_revoke(struct vop_revoke_args *); 704int vop_eopnotsupp(struct vop_generic_args *ap); 705int vop_ebadf(struct vop_generic_args *ap); 706int vop_einval(struct vop_generic_args *ap); 707int vop_enotty(struct vop_generic_args *ap); 708int vop_defaultop(struct vop_generic_args *ap); 709int vop_null(struct vop_generic_args *ap); 710int vop_panic(struct vop_generic_args *ap); 711int vop_stdcreatevobject(struct vop_createvobject_args *ap); 712int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 713int vop_stdgetvobject(struct vop_getvobject_args *ap); 714 715void vfree(struct vnode *); 716void vput(struct vnode *vp); 717void vrele(struct vnode *vp); 718void vref(struct vnode *vp); 719int vrefcnt(struct vnode *vp); 720void vbusy(struct vnode *vp); 721void v_addpollinfo(struct vnode *vp); 722 723extern vop_t **default_vnodeop_p; 724extern vop_t **spec_vnodeop_p; 725extern vop_t **dead_vnodeop_p; 726 727#endif /* _KERNEL */ 728 729#endif /* !_SYS_VNODE_H_ */ 730