vnode.h revision 140181
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 30 * $FreeBSD: head/sys/sys/vnode.h 140181 2005-01-13 12:25:19Z phk $ 31 */ 32 33#ifndef _SYS_VNODE_H_ 34#define _SYS_VNODE_H_ 35 36/* 37 * XXX - compatability until lockmgr() goes away or all the #includes are 38 * updated. 39 */ 40#include <sys/lockmgr.h> 41 42#include <sys/bufobj.h> 43#include <sys/queue.h> 44#include <sys/_lock.h> 45#include <sys/lock.h> 46#include <sys/_mutex.h> 47#include <sys/mutex.h> 48#include <sys/selinfo.h> 49#include <sys/uio.h> 50#include <sys/acl.h> 51#include <sys/ktr.h> 52 53/* 54 * The vnode is the focus of all file activity in UNIX. There is a 55 * unique vnode allocated for each active file, each current directory, 56 * each mounted-on file, text file, and the root. 57 */ 58 59/* 60 * Vnode types. VNON means no type. 61 */ 62enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 63 64/* 65 * Each underlying filesystem allocates its own private area and hangs 66 * it from v_data. If non-null, this area is freed in getnewvnode(). 67 */ 68 69struct namecache; 70 71struct vpollinfo { 72 struct mtx vpi_lock; /* lock to protect below */ 73 struct selinfo vpi_selinfo; /* identity of poller(s) */ 74 short vpi_events; /* what they are looking for */ 75 short vpi_revents; /* what has happened */ 76}; 77 78/* 79 * Reading or writing any of these items requires holding the appropriate lock. 80 * 81 * Lock reference: 82 * c - namecache mutex 83 * f - freelist mutex 84 * G - Giant 85 * i - interlock 86 * m - mntvnodes mutex 87 * p - pollinfo lock 88 * s - spechash mutex 89 * S - syncer mutex 90 * u - Only a reference to the vnode is needed to read. 91 * v - vnode lock 92 * 93 * Vnodes may be found on many lists. The general way to deal with operating 94 * on a vnode that is on a list is: 95 * 1) Lock the list and find the vnode. 96 * 2) Lock interlock so that the vnode does not go away. 97 * 3) Unlock the list to avoid lock order reversals. 98 * 4) vget with LK_INTERLOCK and check for ENOENT, or 99 * 5) Check for XLOCK if the vnode lock is not required. 100 * 6) Perform your operation, then vput(). 101 * 102 * XXX Not all fields are locked yet and some fields that are marked are not 103 * locked consistently. This is a work in progress. Requires Giant! 104 */ 105 106#if defined(_KERNEL) || defined(_KVM_VNODE) 107 108struct vnode { 109 struct mtx v_interlock; /* lock for "i" things */ 110 u_long v_iflag; /* i vnode flags (see below) */ 111 int v_usecount; /* i ref count of users */ 112 struct thread *v_vxthread; /* i thread owning VXLOCK */ 113 int v_holdcnt; /* i page & buffer references */ 114 struct bufobj v_bufobj; /* * Buffer cache object */ 115 u_long v_vflag; /* v vnode flags */ 116 int v_writecount; /* v ref count of writers */ 117 daddr_t v_lastw; /* v last write (write cluster) */ 118 daddr_t v_cstart; /* v start block of cluster */ 119 daddr_t v_lasta; /* v last allocation (cluster) */ 120 int v_clen; /* v length of current cluster */ 121 union { 122 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 123 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 124 struct { 125 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 126 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 127 } vu_spec; 128 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 129 } v_un; 130 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 131 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 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 struct vop_vector *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; /* G Poll events, p for *v_pi */ 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}; 151 152#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 153 154#define v_mountedhere v_un.vu_mountedhere 155#define v_socket v_un.vu_socket 156#define v_rdev v_un.vu_spec.vu_cdev 157#define v_specnext v_un.vu_spec.vu_specnext 158#define v_fifoinfo v_un.vu_fifoinfo 159 160/* XXX: These are temporary to avoid a source sweep at this time */ 161#define v_object v_bufobj.bo_object 162 163/* 164 * Userland version of struct vnode, for sysctl. 165 */ 166struct xvnode { 167 size_t xv_size; /* sizeof(struct xvnode) */ 168 void *xv_vnode; /* address of real vnode */ 169 u_long xv_flag; /* vnode vflags */ 170 int xv_usecount; /* reference count of users */ 171 int xv_writecount; /* reference count of writers */ 172 int xv_holdcnt; /* page & buffer references */ 173 u_long xv_id; /* capability identifier */ 174 void *xv_mount; /* address of parent mount */ 175 long xv_numoutput; /* num of writes in progress */ 176 enum vtype xv_type; /* vnode type */ 177 union { 178 void *xvu_socket; /* socket, if VSOCK */ 179 void *xvu_fifo; /* fifo, if VFIFO */ 180 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 181 struct { 182 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 183 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 184 } xv_uns; 185 } xv_un; 186}; 187#define xv_socket xv_un.xvu_socket 188#define xv_fifo xv_un.xvu_fifo 189#define xv_rdev xv_un.xvu_rdev 190#define xv_dev xv_un.xv_uns.xvu_dev 191#define xv_ino xv_un.xv_uns.xvu_ino 192 193#define VN_POLLEVENT(vp, events) \ 194 do { \ 195 if ((vp)->v_pollinfo != NULL && \ 196 (vp)->v_pollinfo->vpi_events & (events)) \ 197 vn_pollevent((vp), (events)); \ 198 } while (0) 199 200#define VN_KNOTE(vp, b, a) \ 201 do { \ 202 if ((vp)->v_pollinfo != NULL) \ 203 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 204 } while (0) 205#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 206#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 207 208/* 209 * Vnode flags. 210 * VI flags are protected by interlock and live in v_iflag 211 * VV flags are protected by the vnode lock and live in v_vflag 212 */ 213#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 214#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 215#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 216#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 217#define VI_MOUNT 0x0020 /* Mount in progress */ 218#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 219#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 220#define VI_FREE 0x0100 /* This vnode is on the freelist */ 221#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 222#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 223 224#define VV_ROOT 0x0001 /* root of its filesystem */ 225#define VV_ISTTY 0x0002 /* vnode represents a tty */ 226#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 227#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 228#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 229#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 230#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 231#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 232#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 233 234/* 235 * Vnode attributes. A field value of VNOVAL represents a field whose value 236 * is unavailable (getattr) or which is not to be changed (setattr). 237 */ 238struct vattr { 239 enum vtype va_type; /* vnode type (for create) */ 240 u_short va_mode; /* files access mode and type */ 241 short va_nlink; /* number of references to file */ 242 uid_t va_uid; /* owner user id */ 243 gid_t va_gid; /* owner group id */ 244 dev_t va_fsid; /* filesystem id */ 245 long va_fileid; /* file id */ 246 u_quad_t va_size; /* file size in bytes */ 247 long va_blocksize; /* blocksize preferred for i/o */ 248 struct timespec va_atime; /* time of last access */ 249 struct timespec va_mtime; /* time of last modification */ 250 struct timespec va_ctime; /* time file changed */ 251 struct timespec va_birthtime; /* time file created */ 252 u_long va_gen; /* generation number of file */ 253 u_long va_flags; /* flags defined for file */ 254 dev_t va_rdev; /* device the special file represents */ 255 u_quad_t va_bytes; /* bytes of disk space held by file */ 256 u_quad_t va_filerev; /* file modification number */ 257 u_int va_vaflags; /* operations flags, see below */ 258 long va_spare; /* remain quad aligned */ 259}; 260 261/* 262 * Flags for va_vaflags. 263 */ 264#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 265#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 266 267/* 268 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 269 * help with write clustering) 270 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 271 */ 272#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 273#define IO_APPEND 0x0002 /* append write to end */ 274#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 275#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 276#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 277#define IO_VMIO 0x0020 /* data already in VMIO space */ 278#define IO_INVAL 0x0040 /* invalidate after I/O */ 279#define IO_SYNC 0x0080 /* do I/O synchronously */ 280#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 281#define IO_EXT 0x0400 /* operate on external attributes */ 282#define IO_NORMAL 0x0800 /* operate on regular data */ 283#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 284 285#define IO_SEQMAX 0x7F /* seq heuristic max value */ 286#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 287 288/* 289 * Modes. Some values same as Ixxx entries from inode.h for now. 290 */ 291#define VEXEC 000100 /* execute/search permission */ 292#define VWRITE 000200 /* write permission */ 293#define VREAD 000400 /* read permission */ 294#define VSVTX 001000 /* save swapped text even after use */ 295#define VSGID 002000 /* set group id on execution */ 296#define VSUID 004000 /* set user id on execution */ 297#define VADMIN 010000 /* permission to administer */ 298#define VSTAT 020000 /* permission to retrieve attrs */ 299#define VAPPEND 040000 /* permission to write/append */ 300#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 301 302/* 303 * Token indicating no attribute value yet assigned. 304 */ 305#define VNOVAL (-1) 306 307/* 308 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 309 */ 310#define VLKTIMEOUT (hz / 20 + 1) 311 312#ifdef _KERNEL 313 314#ifdef MALLOC_DECLARE 315MALLOC_DECLARE(M_VNODE); 316#endif 317 318/* 319 * Convert between vnode types and inode formats (since POSIX.1 320 * defines mode word of stat structure in terms of inode formats). 321 */ 322extern enum vtype iftovt_tab[]; 323extern int vttoif_tab[]; 324#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 325#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 326#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 327 328/* 329 * Flags to various vnode functions. 330 */ 331#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 332#define FORCECLOSE 0x0002 /* vflush: force file closure */ 333#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 334#define DOCLOSE 0x0008 /* vclean: close active files */ 335#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 336#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 337#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 338#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 339#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 340#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 341#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 342 343#define VREF(vp) vref(vp) 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/* 354 * Global vnode data. 355 */ 356extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 357extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 358extern int desiredvnodes; /* number of vnodes desired */ 359extern struct uma_zone *namei_zone; 360extern int prtactive; /* nonzero to call vprint() */ 361extern struct vattr va_null; /* predefined null vattr structure */ 362 363/* 364 * Macro/function to check for client cache inconsistency w.r.t. leasing. 365 */ 366#define LEASE_READ 0x1 /* Check lease for readers */ 367#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 368 369extern void (*lease_updatetime)(int deltat); 370 371/* Requires interlock. */ 372#define VSHOULDFREE(vp) \ 373 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 374 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 375 (!(vp)->v_object || \ 376 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 377 378/* Requires interlock. */ 379#define VMIGHTFREE(vp) \ 380 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 381 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 382 383/* Requires interlock. */ 384#define VSHOULDBUSY(vp) \ 385 (((vp)->v_iflag & VI_FREE) && \ 386 ((vp)->v_holdcnt || (vp)->v_usecount)) 387 388#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 389#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 390#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 391#define VI_MTX(vp) (&(vp)->v_interlock) 392 393#endif /* _KERNEL */ 394 395/* 396 * Mods for extensibility. 397 */ 398 399/* 400 * Flags for vdesc_flags: 401 */ 402#define VDESC_MAX_VPS 16 403/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 404#define VDESC_VP0_WILLRELE 0x0001 405#define VDESC_VP1_WILLRELE 0x0002 406#define VDESC_VP2_WILLRELE 0x0004 407#define VDESC_VP3_WILLRELE 0x0008 408#define VDESC_NOMAP_VPP 0x0100 409#define VDESC_VPP_WILLRELE 0x0200 410 411/* 412 * A generic structure. 413 * This can be used by bypass routines to identify generic arguments. 414 */ 415struct vop_generic_args { 416 struct vnodeop_desc *a_desc; 417 /* other random data follows, presumably */ 418}; 419 420typedef int vop_bypass_t(struct vop_generic_args *); 421 422/* 423 * VDESC_NO_OFFSET is used to identify the end of the offset list 424 * and in places where no such field exists. 425 */ 426#define VDESC_NO_OFFSET -1 427 428/* 429 * This structure describes the vnode operation taking place. 430 */ 431struct vnodeop_desc { 432 char *vdesc_name; /* a readable name for debugging */ 433 int vdesc_flags; /* VDESC_* flags */ 434 vop_bypass_t *vdesc_call; /* Function to call */ 435 436 /* 437 * These ops are used by bypass routines to map and locate arguments. 438 * Creds and procs are not needed in bypass routines, but sometimes 439 * they are useful to (for example) transport layers. 440 * Nameidata is useful because it has a cred in it. 441 */ 442 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 443 int vdesc_vpp_offset; /* return vpp location */ 444 int vdesc_cred_offset; /* cred location, if any */ 445 int vdesc_thread_offset; /* thread location, if any */ 446 int vdesc_componentname_offset; /* if any */ 447 /* 448 * Finally, we've got a list of private data (about each operation) 449 * for each transport layer. (Support to manage this list is not 450 * yet part of BSD.) 451 */ 452 caddr_t *vdesc_transports; 453}; 454 455#ifdef _KERNEL 456/* 457 * A list of all the operation descs. 458 */ 459extern struct vnodeop_desc *vnodeop_descs[]; 460 461#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 462#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 463 ((s_type)(((char*)(struct_p)) + (s_offset))) 464 465 466#ifdef DEBUG_VFS_LOCKS 467/* 468 * Support code to aid in debugging VFS locking problems. Not totally 469 * reliable since if the thread sleeps between changing the lock 470 * state and checking it with the assert, some other thread could 471 * change the state. They are good enough for debugging a single 472 * filesystem using a single-threaded test. 473 */ 474void assert_vi_locked(struct vnode *vp, const char *str); 475void assert_vi_unlocked(struct vnode *vp, const char *str); 476#if 0 477void assert_vop_elocked(struct vnode *vp, const char *str); 478void assert_vop_elocked_other(struct vnode *vp, const char *str); 479#endif 480void assert_vop_locked(struct vnode *vp, const char *str); 481#if 0 482voi0 assert_vop_slocked(struct vnode *vp, const char *str); 483#endif 484void assert_vop_unlocked(struct vnode *vp, const char *str); 485 486/* These are called from within the actual VOPS. */ 487void vop_lock_pre(void *a); 488void vop_lock_post(void *a, int rc); 489void vop_lookup_post(void *a, int rc); 490void vop_lookup_pre(void *a); 491void vop_rename_pre(void *a); 492void vop_strategy_pre(void *a); 493void vop_unlock_post(void *a, int rc); 494void vop_unlock_pre(void *a); 495 496#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 497#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 498#if 0 499#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 500#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 501#endif 502#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 503#if 0 504#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 505#endif 506#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 507 508#else /* !DEBUG_VFS_LOCKS */ 509 510#define ASSERT_VI_LOCKED(vp, str) 511#define ASSERT_VI_UNLOCKED(vp, str) 512#if 0 513#define ASSERT_VOP_ELOCKED(vp, str) 514#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 515#endif 516#define ASSERT_VOP_LOCKED(vp, str) 517#if 0 518#define ASSERT_VOP_SLOCKED(vp, str) 519#endif 520#define ASSERT_VOP_UNLOCKED(vp, str) 521#endif /* DEBUG_VFS_LOCKS */ 522 523 524/* 525 * This call works for vnodes in the kernel. 526 */ 527#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 528 529/* 530 * VMIO support inline 531 */ 532 533extern int vmiodirenable; 534 535static __inline int 536vn_canvmio(struct vnode *vp) 537{ 538 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 539 return(TRUE); 540 return(FALSE); 541} 542 543/* 544 * Finally, include the default set of vnode operations. 545 */ 546#include "vnode_if.h" 547 548/* 549 * Public vnode manipulation functions. 550 */ 551struct componentname; 552struct file; 553struct mount; 554struct nameidata; 555struct ostat; 556struct thread; 557struct proc; 558struct stat; 559struct nstat; 560struct ucred; 561struct uio; 562struct vattr; 563struct vnode; 564 565extern int (*lease_check_hook)(struct vop_lease_args *); 566extern int (*softdep_fsync_hook)(struct vnode *); 567extern int (*softdep_process_worklist_hook)(struct mount *); 568 569/* cache_* may belong in namei.h. */ 570void cache_enter(struct vnode *dvp, struct vnode *vp, 571 struct componentname *cnp); 572int cache_lookup(struct vnode *dvp, struct vnode **vpp, 573 struct componentname *cnp); 574void cache_purge(struct vnode *vp); 575void cache_purgevfs(struct mount *mp); 576int cache_leaf_test(struct vnode *vp); 577int change_dir(struct vnode *vp, struct thread *td); 578int change_root(struct vnode *vp, struct thread *td); 579void cvtstat(struct stat *st, struct ostat *ost); 580void cvtnstat(struct stat *sb, struct nstat *nsb); 581int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 582 struct vnode **vpp); 583u_quad_t init_va_filerev(void); 584int lease_check(struct vop_lease_args *ap); 585int speedup_syncer(void); 586#define textvp_fullpath(p, rb, rfb) \ 587 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 588int vn_fullpath(struct thread *td, struct vnode *vn, 589 char **retbuf, char **freebuf); 590int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 591 mode_t acc_mode, struct ucred *cred, int *privused); 592int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 593 gid_t file_gid, struct acl *acl, mode_t acc_mode, 594 struct ucred *cred, int *privused); 595void vattr_null(struct vattr *vap); 596int vcount(struct vnode *vp); 597void vdrop(struct vnode *); 598void vdropl(struct vnode *); 599int vfinddev(struct cdev *dev, struct vnode **vpp); 600void vfs_add_vnodeops(const void *); 601void vfs_rm_vnodeops(const void *); 602int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 603int vget(struct vnode *vp, int lockflag, struct thread *td); 604void vgone(struct vnode *vp); 605void vgonel(struct vnode *vp, struct thread *td); 606void vhold(struct vnode *); 607void vholdl(struct vnode *); 608int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 609 struct thread *td, int slpflag, int slptimeo); 610int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 611 off_t length, int blksize); 612void vprint(char *label, struct vnode *vp); 613int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 614 struct thread *td); 615int vn_close(struct vnode *vp, 616 int flags, struct ucred *file_cred, struct thread *td); 617void vn_finished_write(struct mount *mp); 618int vn_isdisk(struct vnode *vp, int *errp); 619int vn_lock(struct vnode *vp, int flags, struct thread *td); 620#ifdef DEBUG_LOCKS 621int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 622 const char *filename, int line); 623#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 624#endif 625int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 626int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 627 struct ucred *cred, int fdidx); 628void vn_pollevent(struct vnode *vp, int events); 629void vn_pollgone(struct vnode *vp); 630int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 631int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 632 int len, off_t offset, enum uio_seg segflg, int ioflg, 633 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 634 struct thread *td); 635int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 636 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 637 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 638 struct thread *td); 639int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 640 struct ucred *file_cred, struct thread *td); 641int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 642int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 643 int flags); 644int vn_writechk(struct vnode *vp); 645int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 646 const char *attrname, int *buflen, char *buf, struct thread *td); 647int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 648 const char *attrname, int buflen, char *buf, struct thread *td); 649int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 650 const char *attrname, struct thread *td); 651int vfs_cache_lookup(struct vop_lookup_args *ap); 652void vfs_timestamp(struct timespec *); 653void vfs_write_resume(struct mount *mp); 654int vfs_write_suspend(struct mount *mp); 655int vop_stdbmap(struct vop_bmap_args *); 656int vop_stdfsync(struct vop_fsync_args *); 657int vop_stdgetwritemount(struct vop_getwritemount_args *); 658int vop_stdgetpages(struct vop_getpages_args *); 659int vop_stdinactive(struct vop_inactive_args *); 660int vop_stdislocked(struct vop_islocked_args *); 661int vop_stdlock(struct vop_lock_args *); 662int vop_stdputpages(struct vop_putpages_args *); 663int vop_stdunlock(struct vop_unlock_args *); 664int vop_nopoll(struct vop_poll_args *); 665int vop_stdpathconf(struct vop_pathconf_args *); 666int vop_stdpoll(struct vop_poll_args *); 667int vop_eopnotsupp(struct vop_generic_args *ap); 668int vop_ebadf(struct vop_generic_args *ap); 669int vop_einval(struct vop_generic_args *ap); 670int vop_enotty(struct vop_generic_args *ap); 671int vop_null(struct vop_generic_args *ap); 672int vop_panic(struct vop_generic_args *ap); 673int vop_stdcreatevobject(struct vop_createvobject_args *ap); 674int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 675int vop_stdgetvobject(struct vop_getvobject_args *ap); 676 677void vfree(struct vnode *); 678void vput(struct vnode *vp); 679void vrele(struct vnode *vp); 680void vref(struct vnode *vp); 681int vrefcnt(struct vnode *vp); 682void vbusy(struct vnode *vp); 683void v_addpollinfo(struct vnode *vp); 684 685 686extern struct vop_vector fifo_specops; 687extern struct vop_vector dead_vnodeops; 688extern struct vop_vector default_vnodeops; 689 690#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 691#define VOP_NULL ((void*)(uintptr_t)vop_null) 692#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 693#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 694#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 695#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 696 697 698#endif /* _KERNEL */ 699 700#endif /* !_SYS_VNODE_H_ */ 701