vnode.h revision 100344
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 100344 2002-07-19 07:29:39Z mckusick $ 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; /* SORTED clean blocklist */ 112 struct buf *v_cleanblkroot; /* clean buf splay tree root */ 113 struct buflists v_dirtyblkhd; /* SORTED dirty blocklist */ 114 struct buf *v_dirtyblkroot; /* dirty buf splay tree root */ 115 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 116 long v_numoutput; /* num of writes in progress */ 117 enum vtype v_type; /* vnode type */ 118 union { 119 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 120 struct socket *vu_socket; /* unix ipc (VSOCK) */ 121 struct { 122 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 123 SLIST_ENTRY(vnode) vu_specnext; 124 } vu_spec; 125 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 126 } v_un; 127 daddr_t v_lastw; /* last write (write cluster) */ 128 daddr_t v_cstart; /* start block of cluster */ 129 daddr_t v_lasta; /* last allocation (cluster) */ 130 int v_clen; /* length of current cluster */ 131 struct vm_object *v_object; /* Place to store VM object */ 132 struct mtx v_interlock; /* lock on usecount and flag */ 133 struct lock v_lock; /* used if fs don't have one */ 134 struct lock *v_vnlock; /* pointer to vnode lock */ 135 enum vtagtype v_tag; /* type of underlying data */ 136 void *v_data; /* private data for fs */ 137 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 138 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 139 struct vnode *v_dd; /* .. vnode */ 140 u_long v_ddid; /* .. capability identifier */ 141 struct vpollinfo *v_pollinfo; 142 struct thread *v_vxproc; /* thread owning VXLOCK */ 143#ifdef DEBUG_LOCKS 144 const char *filename; /* Source file doing locking */ 145 int line; /* Line number doing locking */ 146#endif 147}; 148#define v_mountedhere v_un.vu_mountedhere 149#define v_socket v_un.vu_socket 150#define v_rdev v_un.vu_spec.vu_specinfo 151#define v_specnext v_un.vu_spec.vu_specnext 152#define v_fifoinfo v_un.vu_fifoinfo 153 154#define VN_POLLEVENT(vp, events) \ 155 do { \ 156 if ((vp)->v_pollinfo != NULL && \ 157 (vp)->v_pollinfo->vpi_events & (events)) \ 158 vn_pollevent((vp), (events)); \ 159 } while (0) 160 161#define VN_KNOTE(vp, b) \ 162 do { \ 163 if ((vp)->v_pollinfo != NULL) \ 164 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 165 } while (0) 166 167/* 168 * Vnode flags. 169 */ 170#define VROOT 0x00001 /* root of its filesystem */ 171#define VTEXT 0x00002 /* vnode is a pure text prototype */ 172#define VSYSTEM 0x00004 /* vnode being used by kernel */ 173#define VISTTY 0x00008 /* vnode represents a tty */ 174#define VXLOCK 0x00100 /* vnode is locked to change underlying type */ 175#define VXWANT 0x00200 /* thread is waiting for vnode */ 176#define VBWAIT 0x00400 /* waiting for output to complete */ 177#define VNOSYNC 0x01000 /* unlinked, stop syncing */ 178/* open for business 0x01000 */ 179#define VOBJBUF 0x02000 /* Allocate buffers in VM object */ 180#define VCOPYONWRITE 0x04000 /* vnode is doing copy-on-write */ 181#define VAGE 0x08000 /* Insert vnode at head of free list */ 182#define VOLOCK 0x10000 /* vnode is locked waiting for an object */ 183#define VOWANT 0x20000 /* a thread is waiting for VOLOCK */ 184#define VDOOMED 0x40000 /* This vnode is being recycled */ 185#define VFREE 0x80000 /* This vnode is on the freelist */ 186/* open for business 0x100000 */ 187#define VONWORKLST 0x200000 /* On syncer work-list */ 188#define VMOUNT 0x400000 /* Mount in progress */ 189#define VOBJDIRTY 0x800000 /* object might be dirty */ 190 191/* 192 * Vnode attributes. A field value of VNOVAL represents a field whose value 193 * is unavailable (getattr) or which is not to be changed (setattr). 194 */ 195struct vattr { 196 enum vtype va_type; /* vnode type (for create) */ 197 u_short va_mode; /* files access mode and type */ 198 short va_nlink; /* number of references to file */ 199 uid_t va_uid; /* owner user id */ 200 gid_t va_gid; /* owner group id */ 201 udev_t va_fsid; /* filesystem id */ 202 long va_fileid; /* file id */ 203 u_quad_t va_size; /* file size in bytes */ 204 long va_blocksize; /* blocksize preferred for i/o */ 205 struct timespec va_atime; /* time of last access */ 206 struct timespec va_mtime; /* time of last modification */ 207 struct timespec va_ctime; /* time file changed */ 208 struct timespec va_birthtime; /* time file created */ 209 u_long va_gen; /* generation number of file */ 210 u_long va_flags; /* flags defined for file */ 211 udev_t va_rdev; /* device the special file represents */ 212 u_quad_t va_bytes; /* bytes of disk space held by file */ 213 u_quad_t va_filerev; /* file modification number */ 214 u_int va_vaflags; /* operations flags, see below */ 215 long va_spare; /* remain quad aligned */ 216}; 217 218/* 219 * Flags for va_vaflags. 220 */ 221#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 222#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 223 224/* 225 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 226 * help with write clustering) 227 */ 228#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 229#define IO_APPEND 0x0002 /* append write to end */ 230#define IO_SYNC 0x0004 /* do I/O synchronously */ 231#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 232#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 233#define IO_VMIO 0x0020 /* data already in VMIO space */ 234#define IO_INVAL 0x0040 /* invalidate after I/O */ 235#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 236#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 237#define IO_NOWDRAIN 0x0200 /* do not block on wdrain */ 238#define IO_EXT 0x0400 /* operate on external attributes */ 239#define IO_NORMAL 0x0800 /* operate on regular data */ 240 241/* 242 * Modes. Some values same as Ixxx entries from inode.h for now. 243 */ 244#define VADMIN 010000 /* permission to administer vnode */ 245#define VSUID 004000 /* set user id on execution */ 246#define VSGID 002000 /* set group id on execution */ 247#define VSVTX 001000 /* save swapped text even after use */ 248#define VREAD 000400 /* read, write, execute permissions */ 249#define VWRITE 000200 250#define VEXEC 000100 251 252/* 253 * Token indicating no attribute value yet assigned. 254 */ 255#define VNOVAL (-1) 256 257/* 258 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 259 */ 260#define VLKTIMEOUT (hz / 20 + 1) 261 262#ifdef _KERNEL 263 264#ifdef MALLOC_DECLARE 265MALLOC_DECLARE(M_VNODE); 266#endif 267 268/* 269 * Convert between vnode types and inode formats (since POSIX.1 270 * defines mode word of stat structure in terms of inode formats). 271 */ 272extern enum vtype iftovt_tab[]; 273extern int vttoif_tab[]; 274#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 275#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 276#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 277 278/* 279 * Flags to various vnode functions. 280 */ 281#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 282#define FORCECLOSE 0x0002 /* vflush: force file closure */ 283#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 284#define DOCLOSE 0x0008 /* vclean: close active files */ 285#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 286#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 287#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 288#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 289#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 290#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 291#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 292 293#define VREF(vp) vref(vp) 294 295 296#ifdef DIAGNOSTIC 297#define VATTR_NULL(vap) vattr_null(vap) 298#else 299#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 300#endif /* DIAGNOSTIC */ 301 302#define NULLVP ((struct vnode *)NULL) 303 304#define VNODEOP_SET(f) \ 305 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 306 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 307 308/* 309 * Global vnode data. 310 */ 311extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 312extern int desiredvnodes; /* number of vnodes desired */ 313extern uma_zone_t namei_zone; 314extern int prtactive; /* nonzero to call vprint() */ 315extern struct vattr va_null; /* predefined null vattr structure */ 316extern int vfs_ioopt; 317 318/* 319 * Macro/function to check for client cache inconsistency w.r.t. leasing. 320 */ 321#define LEASE_READ 0x1 /* Check lease for readers */ 322#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 323 324 325extern void (*lease_updatetime)(int deltat); 326 327#define VSHOULDFREE(vp) \ 328 (!((vp)->v_flag & (VFREE|VDOOMED)) && \ 329 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 330 (!(vp)->v_object || \ 331 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 332 333#define VMIGHTFREE(vp) \ 334 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \ 335 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 336 337#define VSHOULDBUSY(vp) \ 338 (((vp)->v_flag & VFREE) && \ 339 ((vp)->v_holdcnt || (vp)->v_usecount)) 340 341#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 342#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 343#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 344 345#endif /* _KERNEL */ 346 347 348/* 349 * Mods for extensibility. 350 */ 351 352/* 353 * Flags for vdesc_flags: 354 */ 355#define VDESC_MAX_VPS 16 356/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 357#define VDESC_VP0_WILLRELE 0x0001 358#define VDESC_VP1_WILLRELE 0x0002 359#define VDESC_VP2_WILLRELE 0x0004 360#define VDESC_VP3_WILLRELE 0x0008 361#define VDESC_NOMAP_VPP 0x0100 362#define VDESC_VPP_WILLRELE 0x0200 363 364/* 365 * VDESC_NO_OFFSET is used to identify the end of the offset list 366 * and in places where no such field exists. 367 */ 368#define VDESC_NO_OFFSET -1 369 370/* 371 * This structure describes the vnode operation taking place. 372 */ 373struct vnodeop_desc { 374 int vdesc_offset; /* offset in vector,first for speed */ 375 char *vdesc_name; /* a readable name for debugging */ 376 int vdesc_flags; /* VDESC_* flags */ 377 378 /* 379 * These ops are used by bypass routines to map and locate arguments. 380 * Creds and procs are not needed in bypass routines, but sometimes 381 * they are useful to (for example) transport layers. 382 * Nameidata is useful because it has a cred in it. 383 */ 384 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 385 int vdesc_vpp_offset; /* return vpp location */ 386 int vdesc_cred_offset; /* cred location, if any */ 387 int vdesc_thread_offset; /* thread location, if any */ 388 int vdesc_componentname_offset; /* if any */ 389 /* 390 * Finally, we've got a list of private data (about each operation) 391 * for each transport layer. (Support to manage this list is not 392 * yet part of BSD.) 393 */ 394 caddr_t *vdesc_transports; 395}; 396 397#ifdef _KERNEL 398/* 399 * A list of all the operation descs. 400 */ 401extern struct vnodeop_desc *vnodeop_descs[]; 402 403/* 404 * Interlock for scanning list of vnodes attached to a mountpoint 405 */ 406extern struct mtx mntvnode_mtx; 407 408/* 409 * This macro is very helpful in defining those offsets in the vdesc struct. 410 * 411 * This is stolen from X11R4. I ignored all the fancy stuff for 412 * Crays, so if you decide to port this to such a serious machine, 413 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 414 */ 415#define VOPARG_OFFSET(p_type,field) \ 416 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 417#define VOPARG_OFFSETOF(s_type,field) \ 418 VOPARG_OFFSET(s_type*,field) 419#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 420 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 421 422 423/* 424 * This structure is used to configure the new vnodeops vector. 425 */ 426struct vnodeopv_entry_desc { 427 struct vnodeop_desc *opve_op; /* which operation this is */ 428 vop_t *opve_impl; /* code implementing this operation */ 429}; 430struct vnodeopv_desc { 431 /* ptr to the ptr to the vector where op should go */ 432 vop_t ***opv_desc_vector_p; 433 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 434}; 435 436/* 437 * A generic structure. 438 * This can be used by bypass routines to identify generic arguments. 439 */ 440struct vop_generic_args { 441 struct vnodeop_desc *a_desc; 442 /* other random data follows, presumably */ 443}; 444 445 446#ifdef DEBUG_VFS_LOCKS 447/* 448 * Macros to aid in tracing VFS locking problems. Not totally 449 * reliable since if the thread sleeps between changing the lock 450 * state and checking it with the assert, some other thread could 451 * change the state. They are good enough for debugging a single 452 * filesystem using a single-threaded test. I find that 'cvs co src' 453 * is a pretty good test. 454 */ 455 456extern int vfs_badlock_panic; 457extern int vfs_badlock_print; 458 459/* 460 * This only exists to supress warnings from unlocked specfs accesses. It is 461 * no longer ok to have an unlocked VFS. 462 */ 463 464#define IGNORE_LOCK(vp) ((vp)->v_type == VCHR) 465 466#define ASSERT_VOP_LOCKED(vp, str) \ 467do { \ 468 struct vnode *_vp = (vp); \ 469 \ 470 if (_vp && !IGNORE_LOCK(_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 && !IGNORE_LOCK(_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 && !IGNORE_LOCK(_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 && !IGNORE_LOCK(_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 && !IGNORE_LOCK(_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 526void vop_rename_pre(void *a); 527void vop_strategy_pre(void *a); 528void vop_lookup_pre(void *a); 529void vop_lookup_post(void *a, int rc); 530 531#else 532 533#define ASSERT_VOP_LOCKED(vp, str) 534#define ASSERT_VOP_UNLOCKED(vp, str) 535 536#endif 537 538/* 539 * VOCALL calls an op given an ops vector. We break it out because BSD's 540 * vclean changes the ops vector and then wants to call ops with the old 541 * vector. 542 */ 543#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 544 545/* 546 * This call works for vnodes in the kernel. 547 */ 548#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 549#define VDESC(OP) (& __CONCAT(OP,_desc)) 550#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 551 552/* 553 * VMIO support inline 554 */ 555 556extern int vmiodirenable; 557 558static __inline int 559vn_canvmio(struct vnode *vp) 560{ 561 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 562 return(TRUE); 563 return(FALSE); 564} 565 566/* 567 * Finally, include the default set of vnode operations. 568 */ 569#include "vnode_if.h" 570 571/* 572 * Public vnode manipulation functions. 573 */ 574struct componentname; 575struct file; 576struct mount; 577struct nameidata; 578struct ostat; 579struct thread; 580struct proc; 581struct stat; 582struct nstat; 583struct ucred; 584struct uio; 585struct vattr; 586struct vnode; 587 588extern int (*lease_check_hook)(struct vop_lease_args *); 589extern int (*softdep_fsync_hook)(struct vnode *); 590extern int (*softdep_process_worklist_hook)(struct mount *); 591 592struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 593int bdevvp(dev_t dev, struct vnode **vpp); 594/* cache_* may belong in namei.h. */ 595void cache_enter(struct vnode *dvp, struct vnode *vp, 596 struct componentname *cnp); 597int cache_lookup(struct vnode *dvp, struct vnode **vpp, 598 struct componentname *cnp); 599void cache_purge(struct vnode *vp); 600void cache_purgevfs(struct mount *mp); 601int cache_leaf_test(struct vnode *vp); 602void cvtstat(struct stat *st, struct ostat *ost); 603void cvtnstat(struct stat *sb, struct nstat *nsb); 604int getnewvnode(enum vtagtype tag, 605 struct mount *mp, vop_t **vops, struct vnode **vpp); 606int lease_check(struct vop_lease_args *ap); 607int spec_vnoperate(struct vop_generic_args *); 608int speedup_syncer(void); 609#define textvp_fullpath(p, rb, rfb) \ 610 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 611int vn_fullpath(struct thread *td, struct vnode *vn, 612 char **retbuf, char **freebuf); 613int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 614 mode_t acc_mode, struct ucred *cred, int *privused); 615int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 616 gid_t file_gid, struct acl *acl, mode_t acc_mode, 617 struct ucred *cred, int *privused); 618void vattr_null(struct vattr *vap); 619int vcount(struct vnode *vp); 620void vdrop(struct vnode *); 621int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 622void vfs_add_vnodeops(const void *); 623void vfs_rm_vnodeops(const void *); 624int vflush(struct mount *mp, int rootrefs, int flags); 625int vget(struct vnode *vp, int lockflag, struct thread *td); 626void vgone(struct vnode *vp); 627void vgonel(struct vnode *vp, struct thread *td); 628void vhold(struct vnode *); 629int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 630 struct thread *td, int slpflag, int slptimeo); 631int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 632 off_t length, int blksize); 633void vprint(char *label, struct vnode *vp); 634int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 635 struct thread *td); 636int vn_close(struct vnode *vp, 637 int flags, struct ucred *cred, struct thread *td); 638void vn_finished_write(struct mount *mp); 639int vn_isdisk(struct vnode *vp, int *errp); 640int vn_lock(struct vnode *vp, int flags, struct thread *td); 641#ifdef DEBUG_LOCKS 642int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 643 const char *filename, int line); 644#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 645#endif 646int vn_mkdir(char *path, int mode, enum uio_seg segflg, struct thread *td); 647int vn_open(struct nameidata *ndp, int *flagp, int cmode); 648int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 649 struct ucred *cred); 650void vn_pollevent(struct vnode *vp, int events); 651void vn_pollgone(struct vnode *vp); 652int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 653int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 654 int len, off_t offset, enum uio_seg segflg, int ioflg, 655 struct ucred *cred, int *aresid, struct thread *td); 656int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 657 int len, off_t offset, enum uio_seg segflg, int ioflg, 658 struct ucred *cred, int *aresid, struct thread *td); 659int vn_stat(struct vnode *vp, struct stat *sb, struct thread *td); 660int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 661dev_t vn_todev(struct vnode *vp); 662int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 663 int flags); 664int vn_writechk(struct vnode *vp); 665int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 666 const char *attrname, int *buflen, char *buf, struct thread *td); 667int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 668 const char *attrname, int buflen, char *buf, struct thread *td); 669int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 670 const char *attrname, struct thread *td); 671int vfs_cache_lookup(struct vop_lookup_args *ap); 672int vfs_object_create(struct vnode *vp, struct thread *td, 673 struct ucred *cred); 674void vfs_timestamp(struct timespec *); 675void vfs_write_resume(struct mount *mp); 676void vfs_write_suspend(struct mount *mp); 677int vop_stdbmap(struct vop_bmap_args *); 678int vop_stdgetwritemount(struct vop_getwritemount_args *); 679int vop_stdgetpages(struct vop_getpages_args *); 680int vop_stdinactive(struct vop_inactive_args *); 681int vop_stdislocked(struct vop_islocked_args *); 682int vop_stdlock(struct vop_lock_args *); 683int vop_stdputpages(struct vop_putpages_args *); 684int vop_stdunlock(struct vop_unlock_args *); 685int vop_noislocked(struct vop_islocked_args *); 686int vop_nolock(struct vop_lock_args *); 687int vop_nopoll(struct vop_poll_args *); 688int vop_nounlock(struct vop_unlock_args *); 689int vop_stdpathconf(struct vop_pathconf_args *); 690int vop_stdpoll(struct vop_poll_args *); 691int vop_revoke(struct vop_revoke_args *); 692int vop_sharedlock(struct vop_lock_args *); 693int vop_eopnotsupp(struct vop_generic_args *ap); 694int vop_ebadf(struct vop_generic_args *ap); 695int vop_einval(struct vop_generic_args *ap); 696int vop_enotty(struct vop_generic_args *ap); 697int vop_defaultop(struct vop_generic_args *ap); 698int vop_null(struct vop_generic_args *ap); 699int vop_panic(struct vop_generic_args *ap); 700int vop_stdcreatevobject(struct vop_createvobject_args *ap); 701int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 702int vop_stdgetvobject(struct vop_getvobject_args *ap); 703 704void vfree(struct vnode *); 705void vput(struct vnode *vp); 706void vrele(struct vnode *vp); 707void vref(struct vnode *vp); 708void vbusy(struct vnode *vp); 709void v_addpollinfo(struct vnode *vp); 710 711extern vop_t **default_vnodeop_p; 712extern vop_t **spec_vnodeop_p; 713extern vop_t **dead_vnodeop_p; 714 715#endif /* _KERNEL */ 716 717#endif /* !_SYS_VNODE_H_ */ 718