vnode.h revision 99426
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 99426 2002-07-05 05:51:25Z jeff $ 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/_mutex.h> 49#include <sys/selinfo.h> 50#include <sys/uio.h> 51#include <sys/acl.h> 52#include <vm/uma.h> 53 54/* 55 * The vnode is the focus of all file activity in UNIX. There is a 56 * unique vnode allocated for each active file, each current directory, 57 * each mounted-on file, text file, and the root. 58 */ 59 60/* 61 * Vnode types. VNON means no type. 62 */ 63enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 64 65/* 66 * Vnode tag types. 67 * These are for the benefit of external programs only (e.g., pstat) 68 * and should NEVER be inspected by the kernel. 69 */ 70enum vtagtype { 71 VT_NON, VT_UFS, VT_NFS, VT_UNUSED, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 72 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 73 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, 74 VT_HPFS, VT_NWFS, VT_PSEUDOFS, VT_SMBFS, VT_UDF 75}; 76 77/* 78 * Each underlying filesystem allocates its own private area and hangs 79 * it from v_data. If non-null, this area is freed in getnewvnode(). 80 */ 81TAILQ_HEAD(buflists, buf); 82 83typedef int vop_t(void *); 84struct namecache; 85 86struct vpollinfo { 87 struct mtx vpi_lock; /* lock to protect below */ 88 struct selinfo vpi_selinfo; /* identity of poller(s) */ 89 short vpi_events; /* what they are looking for */ 90 short vpi_revents; /* what has happened */ 91}; 92 93/* 94 * Reading or writing any of these items requires holding the appropriate lock. 95 * v_freelist is locked by the global vnode_free_list mutex. 96 * v_mntvnodes is locked by the global mntvnodes mutex. 97 * v_flag, v_usecount, v_holdcount and v_writecount are 98 * locked by the v_interlock mutex. 99 * v_pollinfo is locked by the lock contained inside it. 100 */ 101struct vnode { 102 u_long v_flag; /* vnode flags (see below) */ 103 int v_usecount; /* reference count of users */ 104 int v_writecount; /* reference count of writers */ 105 int v_holdcnt; /* page & buffer references */ 106 u_long v_id; /* capability identifier */ 107 struct mount *v_mount; /* ptr to vfs we are in */ 108 vop_t **v_op; /* vnode operations vector */ 109 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ 110 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ 111 struct buflists v_cleanblkhd; /* clean blocklist head */ 112 struct buflists v_dirtyblkhd; /* dirty blocklist head */ 113 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 114 long v_numoutput; /* num of writes in progress */ 115 enum vtype v_type; /* vnode type */ 116 union { 117 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 118 struct socket *vu_socket; /* unix ipc (VSOCK) */ 119 struct { 120 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 121 SLIST_ENTRY(vnode) vu_specnext; 122 } vu_spec; 123 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 124 } v_un; 125 daddr_t v_lastw; /* last write (write cluster) */ 126 daddr_t v_cstart; /* start block of cluster */ 127 daddr_t v_lasta; /* last allocation (cluster) */ 128 int v_clen; /* length of current cluster */ 129 struct vm_object *v_object; /* Place to store VM object */ 130 struct mtx v_interlock; /* lock on usecount and flag */ 131 struct lock v_lock; /* used if fs don't have one */ 132 struct lock *v_vnlock; /* pointer to vnode lock */ 133 enum vtagtype v_tag; /* type of underlying data */ 134 void *v_data; /* private data for fs */ 135 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 136 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 137 struct vnode *v_dd; /* .. vnode */ 138 u_long v_ddid; /* .. capability identifier */ 139 struct vpollinfo *v_pollinfo; 140 struct thread *v_vxproc; /* thread owning VXLOCK */ 141#ifdef DEBUG_LOCKS 142 const char *filename; /* Source file doing locking */ 143 int line; /* Line number doing locking */ 144#endif 145}; 146#define v_mountedhere v_un.vu_mountedhere 147#define v_socket v_un.vu_socket 148#define v_rdev v_un.vu_spec.vu_specinfo 149#define v_specnext v_un.vu_spec.vu_specnext 150#define v_fifoinfo v_un.vu_fifoinfo 151 152#define VN_POLLEVENT(vp, events) \ 153 do { \ 154 if ((vp)->v_pollinfo != NULL && \ 155 (vp)->v_pollinfo->vpi_events & (events)) \ 156 vn_pollevent((vp), (events)); \ 157 } while (0) 158 159#define VN_KNOTE(vp, b) \ 160 do { \ 161 if ((vp)->v_pollinfo != NULL) \ 162 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 163 } while (0) 164 165/* 166 * Vnode flags. 167 */ 168#define VROOT 0x00001 /* root of its filesystem */ 169#define VTEXT 0x00002 /* vnode is a pure text prototype */ 170#define VSYSTEM 0x00004 /* vnode being used by kernel */ 171#define VISTTY 0x00008 /* vnode represents a tty */ 172#define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 173#define VXWANT 0x00200 /* thread is waiting for vnode */ 174#define VBWAIT 0x00400 /* waiting for output to complete */ 175#define VNOSYNC 0x01000 /* unlinked, stop syncing */ 176/* open for business 0x01000 */ 177#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 178#define VCOPYONWRITE 0x04000 /* vnode is doing copy-on-write */ 179#define VAGE 0x08000 /* Insert vnode at head of free list */ 180#define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 181#define VOWANT 0x20000 /* a thread is waiting for VOLOCK */ 182#define VDOOMED 0x40000 /* This vnode is being recycled */ 183#define VFREE 0x80000 /* This vnode is on the freelist */ 184/* open for business 0x100000 */ 185#define VONWORKLST 0x200000 /* On syncer work-list */ 186#define VMOUNT 0x400000 /* Mount in progress */ 187#define VOBJDIRTY 0x800000 /* object might be dirty */ 188 189/* 190 * Vnode attributes. A field value of VNOVAL represents a field whose value 191 * is unavailable (getattr) or which is not to be changed (setattr). 192 */ 193struct vattr { 194 enum vtype va_type; /* vnode type (for create) */ 195 u_short va_mode; /* files access mode and type */ 196 short va_nlink; /* number of references to file */ 197 uid_t va_uid; /* owner user id */ 198 gid_t va_gid; /* owner group id */ 199 udev_t va_fsid; /* filesystem id */ 200 long va_fileid; /* file id */ 201 u_quad_t va_size; /* file size in bytes */ 202 long va_blocksize; /* blocksize preferred for i/o */ 203 struct timespec va_atime; /* time of last access */ 204 struct timespec va_mtime; /* time of last modification */ 205 struct timespec va_ctime; /* time file changed */ 206 struct timespec va_createtime; /* time file created */ 207 u_long va_gen; /* generation number of file */ 208 u_long va_flags; /* flags defined for file */ 209 udev_t va_rdev; /* device the special file represents */ 210 u_quad_t va_bytes; /* bytes of disk space held by file */ 211 u_quad_t va_filerev; /* file modification number */ 212 u_int va_vaflags; /* operations flags, see below */ 213 long va_spare; /* remain quad aligned */ 214}; 215 216/* 217 * Flags for va_vaflags. 218 */ 219#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 220#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 221 222/* 223 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 224 * help with write clustering) 225 */ 226#define IO_UNIT 0x01 /* do I/O as atomic unit */ 227#define IO_APPEND 0x02 /* append write to end */ 228#define IO_SYNC 0x04 /* do I/O synchronously */ 229#define IO_NODELOCKED 0x08 /* underlying node already locked */ 230#define IO_NDELAY 0x10 /* FNDELAY flag set in file table */ 231#define IO_VMIO 0x20 /* data already in VMIO space */ 232#define IO_INVAL 0x40 /* invalidate after I/O */ 233#define IO_ASYNC 0x80 /* bawrite rather then bdwrite */ 234#define IO_DIRECT 0x100 /* attempt to bypass buffer cache */ 235#define IO_NOWDRAIN 0x200 /* do not block on wdrain */ 236 237/* 238 * Modes. Some values same as Ixxx entries from inode.h for now. 239 */ 240#define VADMIN 010000 /* permission to administer vnode */ 241#define VSUID 004000 /* set user id on execution */ 242#define VSGID 002000 /* set group id on execution */ 243#define VSVTX 001000 /* save swapped text even after use */ 244#define VREAD 000400 /* read, write, execute permissions */ 245#define VWRITE 000200 246#define VEXEC 000100 247 248/* 249 * Token indicating no attribute value yet assigned. 250 */ 251#define VNOVAL (-1) 252 253/* 254 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 255 */ 256#define VLKTIMEOUT (hz / 20 + 1) 257 258#ifdef _KERNEL 259 260#ifdef MALLOC_DECLARE 261MALLOC_DECLARE(M_VNODE); 262#endif 263 264/* 265 * Convert between vnode types and inode formats (since POSIX.1 266 * defines mode word of stat structure in terms of inode formats). 267 */ 268extern enum vtype iftovt_tab[]; 269extern int vttoif_tab[]; 270#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 271#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 272#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 273 274/* 275 * Flags to various vnode functions. 276 */ 277#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 278#define FORCECLOSE 0x0002 /* vflush: force file closure */ 279#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 280#define DOCLOSE 0x0008 /* vclean: close active files */ 281#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 282#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 283#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 284#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 285#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 286 287#define VREF(vp) vref(vp) 288 289 290#ifdef DIAGNOSTIC 291#define VATTR_NULL(vap) vattr_null(vap) 292#else 293#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 294#endif /* DIAGNOSTIC */ 295 296#define NULLVP ((struct vnode *)NULL) 297 298#define VNODEOP_SET(f) \ 299 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 300 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 301 302/* 303 * Global vnode data. 304 */ 305extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 306extern int desiredvnodes; /* number of vnodes desired */ 307extern uma_zone_t namei_zone; 308extern int prtactive; /* nonzero to call vprint() */ 309extern struct vattr va_null; /* predefined null vattr structure */ 310extern int vfs_ioopt; 311 312/* 313 * Macro/function to check for client cache inconsistency w.r.t. leasing. 314 */ 315#define LEASE_READ 0x1 /* Check lease for readers */ 316#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 317 318 319extern void (*lease_updatetime)(int deltat); 320 321#define VSHOULDFREE(vp) \ 322 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 323 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 324 (!(vp)->v_object || \ 325 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 326 327#define VMIGHTFREE(vp) \ 328 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \ 329 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 330 331#define VSHOULDBUSY(vp) \ 332 (((vp)->v_flag & VFREE) && \ 333 ((vp)->v_holdcnt || (vp)->v_usecount)) 334 335#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 336#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 337#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 338 339#endif /* _KERNEL */ 340 341 342/* 343 * Mods for extensibility. 344 */ 345 346/* 347 * Flags for vdesc_flags: 348 */ 349#define VDESC_MAX_VPS 16 350/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 351#define VDESC_VP0_WILLRELE 0x0001 352#define VDESC_VP1_WILLRELE 0x0002 353#define VDESC_VP2_WILLRELE 0x0004 354#define VDESC_VP3_WILLRELE 0x0008 355#define VDESC_NOMAP_VPP 0x0100 356#define VDESC_VPP_WILLRELE 0x0200 357 358/* 359 * VDESC_NO_OFFSET is used to identify the end of the offset list 360 * and in places where no such field exists. 361 */ 362#define VDESC_NO_OFFSET -1 363 364/* 365 * This structure describes the vnode operation taking place. 366 */ 367struct vnodeop_desc { 368 int vdesc_offset; /* offset in vector,first for speed */ 369 char *vdesc_name; /* a readable name for debugging */ 370 int vdesc_flags; /* VDESC_* flags */ 371 372 /* 373 * These ops are used by bypass routines to map and locate arguments. 374 * Creds and procs are not needed in bypass routines, but sometimes 375 * they are useful to (for example) transport layers. 376 * Nameidata is useful because it has a cred in it. 377 */ 378 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 379 int vdesc_vpp_offset; /* return vpp location */ 380 int vdesc_cred_offset; /* cred location, if any */ 381 int vdesc_thread_offset; /* thread location, if any */ 382 int vdesc_componentname_offset; /* if any */ 383 /* 384 * Finally, we've got a list of private data (about each operation) 385 * for each transport layer. (Support to manage this list is not 386 * yet part of BSD.) 387 */ 388 caddr_t *vdesc_transports; 389}; 390 391#ifdef _KERNEL 392/* 393 * A list of all the operation descs. 394 */ 395extern struct vnodeop_desc *vnodeop_descs[]; 396 397/* 398 * Interlock for scanning list of vnodes attached to a mountpoint 399 */ 400extern struct mtx mntvnode_mtx; 401 402/* 403 * This macro is very helpful in defining those offsets in the vdesc struct. 404 * 405 * This is stolen from X11R4. I ignored all the fancy stuff for 406 * Crays, so if you decide to port this to such a serious machine, 407 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 408 */ 409#define VOPARG_OFFSET(p_type,field) \ 410 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 411#define VOPARG_OFFSETOF(s_type,field) \ 412 VOPARG_OFFSET(s_type*,field) 413#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 414 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 415 416 417/* 418 * This structure is used to configure the new vnodeops vector. 419 */ 420struct vnodeopv_entry_desc { 421 struct vnodeop_desc *opve_op; /* which operation this is */ 422 vop_t *opve_impl; /* code implementing this operation */ 423}; 424struct vnodeopv_desc { 425 /* ptr to the ptr to the vector where op should go */ 426 vop_t ***opv_desc_vector_p; 427 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 428}; 429 430/* 431 * A generic structure. 432 * This can be used by bypass routines to identify generic arguments. 433 */ 434struct vop_generic_args { 435 struct vnodeop_desc *a_desc; 436 /* other random data follows, presumably */ 437}; 438 439 440#ifdef DEBUG_VFS_LOCKS 441/* 442 * Macros to aid in tracing VFS locking problems. Not totally 443 * reliable since if the thread sleeps between changing the lock 444 * state and checking it with the assert, some other thread could 445 * change the state. They are good enough for debugging a single 446 * filesystem using a single-threaded test. I find that 'cvs co src' 447 * is a pretty good test. 448 */ 449 450extern int vfs_badlock_panic; 451extern int vfs_badlock_print; 452 453/* 454 * [dfr] Kludge until I get around to fixing all the vfs locking. 455 */ 456#define IS_LOCKING_VFS(vp) ( ((vp)->v_tag == VT_UFS \ 457 || (vp)->v_tag == VT_NFS \ 458 || (vp)->v_tag == VT_LFS \ 459 || (vp)->v_tag == VT_ISOFS \ 460 || (vp)->v_tag == VT_MSDOSFS \ 461 || (vp)->v_tag == VT_DEVFS \ 462 || (vp)->v_tag == VT_UDF) \ 463 && ((vp)->v_type != VBLK \ 464 && (vp)->v_type != VCHR) ) 465 466#define ASSERT_VOP_LOCKED(vp, str) \ 467do { \ 468 struct vnode *_vp = (vp); \ 469 \ 470 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) { \ 471 if (vfs_badlock_print) \ 472 printf("%s: %p is not locked but should be\n", \ 473 str, _vp); \ 474 if (vfs_badlock_panic) \ 475 Debugger("Lock violation.\n"); \ 476 } \ 477} while (0) 478 479#define ASSERT_VOP_UNLOCKED(vp, str) \ 480do { \ 481 struct vnode *_vp = (vp); \ 482 int lockstate; \ 483 \ 484 if (_vp && IS_LOCKING_VFS(_vp)) { \ 485 lockstate = VOP_ISLOCKED(_vp, curthread); \ 486 if (lockstate == LK_EXCLUSIVE) { \ 487 if (vfs_badlock_print) \ 488 printf("%s: %p is locked but should not be\n", \ 489 str, _vp); \ 490 if (vfs_badlock_panic) \ 491 Debugger("Lock Violation.\n"); \ 492 } \ 493 } \ 494} while (0) 495 496#define ASSERT_VOP_ELOCKED(vp, str) \ 497do { \ 498 struct vnode *_vp = (vp); \ 499 \ 500 if (_vp && IS_LOCKING_VFS(_vp) && \ 501 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \ 502 panic("%s: %p is not exclusive locked but should be", \ 503 str, _vp); \ 504} while (0) 505 506#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 507do { \ 508 struct vnode *_vp = (vp); \ 509 \ 510 if (_vp && IS_LOCKING_VFS(_vp) && \ 511 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \ 512 panic("%s: %p is not exclusive locked by another thread", \ 513 str, _vp); \ 514} while (0) 515 516#define ASSERT_VOP_SLOCKED(vp, str) \ 517do { \ 518 struct vnode *_vp = (vp); \ 519 \ 520 if (_vp && IS_LOCKING_VFS(_vp) && \ 521 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \ 522 panic("%s: %p is not locked shared but should be", \ 523 str, _vp); \ 524} while (0) 525 526#else 527 528#define ASSERT_VOP_LOCKED(vp, str) 529#define ASSERT_VOP_UNLOCKED(vp, str) 530 531#endif 532 533/* 534 * VOCALL calls an op given an ops vector. We break it out because BSD's 535 * vclean changes the ops vector and then wants to call ops with the old 536 * vector. 537 */ 538#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 539 540/* 541 * This call works for vnodes in the kernel. 542 */ 543#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 544#define VDESC(OP) (& __CONCAT(OP,_desc)) 545#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 546 547/* 548 * VMIO support inline 549 */ 550 551extern int vmiodirenable; 552 553static __inline int 554vn_canvmio(struct vnode *vp) 555{ 556 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 557 return(TRUE); 558 return(FALSE); 559} 560 561/* 562 * Finally, include the default set of vnode operations. 563 */ 564#include "vnode_if.h" 565 566/* 567 * Public vnode manipulation functions. 568 */ 569struct componentname; 570struct file; 571struct mount; 572struct nameidata; 573struct ostat; 574struct thread; 575struct proc; 576struct stat; 577struct nstat; 578struct ucred; 579struct uio; 580struct vattr; 581struct vnode; 582 583extern int (*lease_check_hook)(struct vop_lease_args *); 584extern int (*softdep_fsync_hook)(struct vnode *); 585extern int (*softdep_process_worklist_hook)(struct mount *); 586 587struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 588int bdevvp(dev_t dev, struct vnode **vpp); 589/* cache_* may belong in namei.h. */ 590void cache_enter(struct vnode *dvp, struct vnode *vp, 591 struct componentname *cnp); 592int cache_lookup(struct vnode *dvp, struct vnode **vpp, 593 struct componentname *cnp); 594void cache_purge(struct vnode *vp); 595void cache_purgevfs(struct mount *mp); 596int cache_leaf_test(struct vnode *vp); 597void cvtstat(struct stat *st, struct ostat *ost); 598void cvtnstat(struct stat *sb, struct nstat *nsb); 599int getnewvnode(enum vtagtype tag, 600 struct mount *mp, vop_t **vops, struct vnode **vpp); 601int lease_check(struct vop_lease_args *ap); 602int spec_vnoperate(struct vop_generic_args *); 603int speedup_syncer(void); 604#define textvp_fullpath(p, rb, rfb) \ 605 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 606int vn_fullpath(struct thread *td, struct vnode *vn, 607 char **retbuf, char **freebuf); 608int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 609 mode_t acc_mode, struct ucred *cred, int *privused); 610int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 611 gid_t file_gid, struct acl *acl, mode_t acc_mode, 612 struct ucred *cred, int *privused); 613void vattr_null(struct vattr *vap); 614int vcount(struct vnode *vp); 615void vdrop(struct vnode *); 616int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 617void vfs_add_vnodeops(const void *); 618void vfs_rm_vnodeops(const void *); 619int vflush(struct mount *mp, int rootrefs, int flags); 620int vget(struct vnode *vp, int lockflag, struct thread *td); 621void vgone(struct vnode *vp); 622void vgonel(struct vnode *vp, struct thread *td); 623void vhold(struct vnode *); 624int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 625 struct thread *td, int slpflag, int slptimeo); 626int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 627 off_t length, int blksize); 628void vprint(char *label, struct vnode *vp); 629int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 630 struct thread *td); 631int vn_close(struct vnode *vp, 632 int flags, struct ucred *cred, struct thread *td); 633void vn_finished_write(struct mount *mp); 634int vn_isdisk(struct vnode *vp, int *errp); 635int vn_lock(struct vnode *vp, int flags, struct thread *td); 636#ifdef DEBUG_LOCKS 637int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 638 const char *filename, int line); 639#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 640#endif 641int vn_mkdir(char *path, int mode, enum uio_seg segflg, struct thread *td); 642int vn_open(struct nameidata *ndp, int *flagp, int cmode); 643int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 644 struct ucred *cred); 645void vn_pollevent(struct vnode *vp, int events); 646void vn_pollgone(struct vnode *vp); 647int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 648int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 649 int len, off_t offset, enum uio_seg segflg, int ioflg, 650 struct ucred *cred, int *aresid, struct thread *td); 651int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 652 int len, off_t offset, enum uio_seg segflg, int ioflg, 653 struct ucred *cred, int *aresid, struct thread *td); 654int vn_stat(struct vnode *vp, struct stat *sb, struct thread *td); 655int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 656dev_t vn_todev(struct vnode *vp); 657int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 658 int flags); 659int vn_writechk(struct vnode *vp); 660int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 661 const char *attrname, int *buflen, char *buf, struct thread *td); 662int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 663 const char *attrname, int buflen, char *buf, struct thread *td); 664int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 665 const char *attrname, struct thread *td); 666int vfs_cache_lookup(struct vop_lookup_args *ap); 667int vfs_object_create(struct vnode *vp, struct thread *td, 668 struct ucred *cred); 669void vfs_timestamp(struct timespec *); 670void vfs_write_resume(struct mount *mp); 671void vfs_write_suspend(struct mount *mp); 672int vop_stdbmap(struct vop_bmap_args *); 673int vop_stdgetwritemount(struct vop_getwritemount_args *); 674int vop_stdgetpages(struct vop_getpages_args *); 675int vop_stdinactive(struct vop_inactive_args *); 676int vop_stdislocked(struct vop_islocked_args *); 677int vop_stdlock(struct vop_lock_args *); 678int vop_stdputpages(struct vop_putpages_args *); 679int vop_stdunlock(struct vop_unlock_args *); 680int vop_noislocked(struct vop_islocked_args *); 681int vop_nolock(struct vop_lock_args *); 682int vop_nopoll(struct vop_poll_args *); 683int vop_nounlock(struct vop_unlock_args *); 684int vop_stdpathconf(struct vop_pathconf_args *); 685int vop_stdpoll(struct vop_poll_args *); 686int vop_revoke(struct vop_revoke_args *); 687int vop_sharedlock(struct vop_lock_args *); 688int vop_eopnotsupp(struct vop_generic_args *ap); 689int vop_ebadf(struct vop_generic_args *ap); 690int vop_einval(struct vop_generic_args *ap); 691int vop_enotty(struct vop_generic_args *ap); 692int vop_defaultop(struct vop_generic_args *ap); 693int vop_null(struct vop_generic_args *ap); 694int vop_panic(struct vop_generic_args *ap); 695int vop_stdcreatevobject(struct vop_createvobject_args *ap); 696int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 697int vop_stdgetvobject(struct vop_getvobject_args *ap); 698 699void vfree(struct vnode *); 700void vput(struct vnode *vp); 701void vrele(struct vnode *vp); 702void vref(struct vnode *vp); 703void vbusy(struct vnode *vp); 704void v_addpollinfo(struct vnode *vp); 705 706extern vop_t **default_vnodeop_p; 707extern vop_t **spec_vnodeop_p; 708extern vop_t **dead_vnodeop_p; 709 710#endif /* _KERNEL */ 711 712#endif /* !_SYS_VNODE_H_ */ 713