vnode.h revision 137508
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 137508 2004-11-10 07:31:06Z 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 69typedef int vop_t(void *); 70struct namecache; 71 72struct vpollinfo { 73 struct mtx vpi_lock; /* lock to protect below */ 74 struct selinfo vpi_selinfo; /* identity of poller(s) */ 75 short vpi_events; /* what they are looking for */ 76 short vpi_revents; /* what has happened */ 77}; 78 79/* 80 * Reading or writing any of these items requires holding the appropriate lock. 81 * 82 * Lock reference: 83 * c - namecache mutex 84 * f - freelist mutex 85 * G - Giant 86 * i - interlock 87 * m - mntvnodes mutex 88 * p - pollinfo lock 89 * s - spechash mutex 90 * S - syncer mutex 91 * u - Only a reference to the vnode is needed to read. 92 * v - vnode lock 93 * 94 * Vnodes may be found on many lists. The general way to deal with operating 95 * on a vnode that is on a list is: 96 * 1) Lock the list and find the vnode. 97 * 2) Lock interlock so that the vnode does not go away. 98 * 3) Unlock the list to avoid lock order reversals. 99 * 4) vget with LK_INTERLOCK and check for ENOENT, or 100 * 5) Check for XLOCK if the vnode lock is not required. 101 * 6) Perform your operation, then vput(). 102 * 103 * XXX Not all fields are locked yet and some fields that are marked are not 104 * locked consistently. This is a work in progress. Requires Giant! 105 */ 106 107#if defined(_KERNEL) || defined(_KVM_VNODE) 108 109struct vnode { 110 struct mtx v_interlock; /* lock for "i" things */ 111 u_long v_iflag; /* i vnode flags (see below) */ 112 int v_usecount; /* i ref count of users */ 113 struct thread *v_vxthread; /* i thread owning VXLOCK */ 114 int v_holdcnt; /* i page & buffer references */ 115 struct bufobj v_bufobj; /* * Buffer cache object */ 116 u_long v_vflag; /* v vnode flags */ 117 int v_writecount; /* v ref count of writers */ 118 daddr_t v_lastw; /* v last write (write cluster) */ 119 daddr_t v_cstart; /* v start block of cluster */ 120 daddr_t v_lasta; /* v last allocation (cluster) */ 121 int v_clen; /* v length of current cluster */ 122 union { 123 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 124 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 125 struct { 126 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 127 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 128 } vu_spec; 129 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 130 } v_un; 131 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 132 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 133 enum vtype v_type; /* u vnode type */ 134 const char *v_tag; /* u type of underlying data */ 135 void *v_data; /* u private data for fs */ 136 struct lock v_lock; /* u used if fs don't have one */ 137 struct lock *v_vnlock; /* u pointer to vnode lock */ 138 vop_t **v_op; /* u vnode operations vector */ 139 struct mount *v_mount; /* u ptr to vfs we are in */ 140 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 141 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 142 u_long v_id; /* c capability identifier */ 143 struct vnode *v_dd; /* c .. vnode */ 144 u_long v_ddid; /* c .. capability identifier */ 145 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 146 struct label *v_label; /* MAC label for vnode */ 147#ifdef DEBUG_LOCKS 148 const char *filename; /* Source file doing locking */ 149 int line; /* Line number doing locking */ 150#endif 151}; 152 153#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 154 155#define v_mountedhere v_un.vu_mountedhere 156#define v_socket v_un.vu_socket 157#define v_rdev v_un.vu_spec.vu_cdev 158#define v_specnext v_un.vu_spec.vu_specnext 159#define v_fifoinfo v_un.vu_fifoinfo 160 161/* XXX: These are temporary to avoid a source sweep at this time */ 162#define v_object v_bufobj.bo_object 163 164/* 165 * Userland version of struct vnode, for sysctl. 166 */ 167struct xvnode { 168 size_t xv_size; /* sizeof(struct xvnode) */ 169 void *xv_vnode; /* address of real vnode */ 170 u_long xv_flag; /* vnode vflags */ 171 int xv_usecount; /* reference count of users */ 172 int xv_writecount; /* reference count of writers */ 173 int xv_holdcnt; /* page & buffer references */ 174 u_long xv_id; /* capability identifier */ 175 void *xv_mount; /* address of parent mount */ 176 long xv_numoutput; /* num of writes in progress */ 177 enum vtype xv_type; /* vnode type */ 178 union { 179 void *xvu_socket; /* socket, if VSOCK */ 180 void *xvu_fifo; /* fifo, if VFIFO */ 181 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 182 struct { 183 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 184 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 185 } xv_uns; 186 } xv_un; 187}; 188#define xv_socket xv_un.xvu_socket 189#define xv_fifo xv_un.xvu_fifo 190#define xv_rdev xv_un.xvu_rdev 191#define xv_dev xv_un.xv_uns.xvu_dev 192#define xv_ino xv_un.xv_uns.xvu_ino 193 194#define VN_POLLEVENT(vp, events) \ 195 do { \ 196 if ((vp)->v_pollinfo != NULL && \ 197 (vp)->v_pollinfo->vpi_events & (events)) \ 198 vn_pollevent((vp), (events)); \ 199 } while (0) 200 201#define VN_KNOTE(vp, b, a) \ 202 do { \ 203 if ((vp)->v_pollinfo != NULL) \ 204 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 205 } while (0) 206#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 207#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 208 209/* 210 * Vnode flags. 211 * VI flags are protected by interlock and live in v_iflag 212 * VV flags are protected by the vnode lock and live in v_vflag 213 */ 214#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 215#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 216#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 217#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 218#define VI_MOUNT 0x0020 /* Mount in progress */ 219#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 220#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 221#define VI_FREE 0x0100 /* This vnode is on the freelist */ 222#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 223#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 224 225#define VV_ROOT 0x0001 /* root of its filesystem */ 226#define VV_ISTTY 0x0002 /* vnode represents a tty */ 227#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 228#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 229#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 230#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 231#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 232#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 233#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 234 235/* 236 * Vnode attributes. A field value of VNOVAL represents a field whose value 237 * is unavailable (getattr) or which is not to be changed (setattr). 238 */ 239struct vattr { 240 enum vtype va_type; /* vnode type (for create) */ 241 u_short va_mode; /* files access mode and type */ 242 short va_nlink; /* number of references to file */ 243 uid_t va_uid; /* owner user id */ 244 gid_t va_gid; /* owner group id */ 245 dev_t va_fsid; /* filesystem id */ 246 long va_fileid; /* file id */ 247 u_quad_t va_size; /* file size in bytes */ 248 long va_blocksize; /* blocksize preferred for i/o */ 249 struct timespec va_atime; /* time of last access */ 250 struct timespec va_mtime; /* time of last modification */ 251 struct timespec va_ctime; /* time file changed */ 252 struct timespec va_birthtime; /* time file created */ 253 u_long va_gen; /* generation number of file */ 254 u_long va_flags; /* flags defined for file */ 255 dev_t va_rdev; /* device the special file represents */ 256 u_quad_t va_bytes; /* bytes of disk space held by file */ 257 u_quad_t va_filerev; /* file modification number */ 258 u_int va_vaflags; /* operations flags, see below */ 259 long va_spare; /* remain quad aligned */ 260}; 261 262/* 263 * Flags for va_vaflags. 264 */ 265#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 266#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 267 268/* 269 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 270 * help with write clustering) 271 */ 272#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 273#define IO_APPEND 0x0002 /* append write to end */ 274#define IO_SYNC 0x0004 /* do I/O synchronously */ 275#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 276#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 277#define IO_VMIO 0x0020 /* data already in VMIO space */ 278#define IO_INVAL 0x0040 /* invalidate after I/O */ 279#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 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#define VNODEOP_SET(f) \ 354 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 355 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 356 357/* 358 * Global vnode data. 359 */ 360extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 361extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 362extern int desiredvnodes; /* number of vnodes desired */ 363extern struct uma_zone *namei_zone; 364extern int prtactive; /* nonzero to call vprint() */ 365extern struct vattr va_null; /* predefined null vattr structure */ 366 367/* 368 * Macro/function to check for client cache inconsistency w.r.t. leasing. 369 */ 370#define LEASE_READ 0x1 /* Check lease for readers */ 371#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 372 373extern void (*lease_updatetime)(int deltat); 374 375/* Requires interlock. */ 376#define VSHOULDFREE(vp) \ 377 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 378 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 379 (!(vp)->v_object || \ 380 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 381 382/* Requires interlock. */ 383#define VMIGHTFREE(vp) \ 384 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 385 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 386 387/* Requires interlock. */ 388#define VSHOULDBUSY(vp) \ 389 (((vp)->v_iflag & VI_FREE) && \ 390 ((vp)->v_holdcnt || (vp)->v_usecount)) 391 392#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 393#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 394#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 395#define VI_MTX(vp) (&(vp)->v_interlock) 396 397#endif /* _KERNEL */ 398 399/* 400 * Mods for extensibility. 401 */ 402 403/* 404 * Flags for vdesc_flags: 405 */ 406#define VDESC_MAX_VPS 16 407/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 408#define VDESC_VP0_WILLRELE 0x0001 409#define VDESC_VP1_WILLRELE 0x0002 410#define VDESC_VP2_WILLRELE 0x0004 411#define VDESC_VP3_WILLRELE 0x0008 412#define VDESC_NOMAP_VPP 0x0100 413#define VDESC_VPP_WILLRELE 0x0200 414 415/* 416 * VDESC_NO_OFFSET is used to identify the end of the offset list 417 * and in places where no such field exists. 418 */ 419#define VDESC_NO_OFFSET -1 420 421/* 422 * This structure describes the vnode operation taking place. 423 */ 424struct vnodeop_desc { 425 int vdesc_offset; /* offset in vector,first for speed */ 426 char *vdesc_name; /* a readable name for debugging */ 427 int vdesc_flags; /* VDESC_* flags */ 428 429 /* 430 * These ops are used by bypass routines to map and locate arguments. 431 * Creds and procs are not needed in bypass routines, but sometimes 432 * they are useful to (for example) transport layers. 433 * Nameidata is useful because it has a cred in it. 434 */ 435 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 436 int vdesc_vpp_offset; /* return vpp location */ 437 int vdesc_cred_offset; /* cred location, if any */ 438 int vdesc_thread_offset; /* thread location, if any */ 439 int vdesc_componentname_offset; /* if any */ 440 /* 441 * Finally, we've got a list of private data (about each operation) 442 * for each transport layer. (Support to manage this list is not 443 * yet part of BSD.) 444 */ 445 caddr_t *vdesc_transports; 446}; 447 448#ifdef _KERNEL 449/* 450 * A list of all the operation descs. 451 */ 452extern struct vnodeop_desc *vnodeop_descs[]; 453 454#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 455#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 456 ((s_type)(((char*)(struct_p)) + (s_offset))) 457 458/* 459 * This structure is used to configure the new vnodeops vector. 460 */ 461struct vnodeopv_entry_desc { 462 struct vnodeop_desc *opve_op; /* which operation this is */ 463 vop_t *opve_impl; /* code implementing this operation */ 464}; 465struct vnodeopv_desc { 466 /* ptr to the ptr to the vector where op should go */ 467 vop_t ***opv_desc_vector_p; 468 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 469}; 470 471/* 472 * A generic structure. 473 * This can be used by bypass routines to identify generic arguments. 474 */ 475struct vop_generic_args { 476 struct vnodeop_desc *a_desc; 477 /* other random data follows, presumably */ 478}; 479 480#ifdef DEBUG_VFS_LOCKS 481/* 482 * Support code to aid in debugging VFS locking problems. Not totally 483 * reliable since if the thread sleeps between changing the lock 484 * state and checking it with the assert, some other thread could 485 * change the state. They are good enough for debugging a single 486 * filesystem using a single-threaded test. 487 */ 488void assert_vi_locked(struct vnode *vp, const char *str); 489void assert_vi_unlocked(struct vnode *vp, const char *str); 490#if 0 491void assert_vop_elocked(struct vnode *vp, const char *str); 492void assert_vop_elocked_other(struct vnode *vp, const char *str); 493#endif 494void assert_vop_locked(struct vnode *vp, const char *str); 495#if 0 496voi0 assert_vop_slocked(struct vnode *vp, const char *str); 497#endif 498void assert_vop_unlocked(struct vnode *vp, const char *str); 499 500/* These are called from within the actual VOPS. */ 501void vop_lock_pre(void *a); 502void vop_lock_post(void *a, int rc); 503void vop_lookup_post(void *a, int rc); 504void vop_lookup_pre(void *a); 505void vop_rename_pre(void *a); 506void vop_strategy_pre(void *a); 507void vop_unlock_post(void *a, int rc); 508void vop_unlock_pre(void *a); 509 510#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 511#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 512#if 0 513#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 514#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 515#endif 516#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 517#if 0 518#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 519#endif 520#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 521 522#else /* !DEBUG_VFS_LOCKS */ 523 524#define ASSERT_VI_LOCKED(vp, str) 525#define ASSERT_VI_UNLOCKED(vp, str) 526#if 0 527#define ASSERT_VOP_ELOCKED(vp, str) 528#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 529#endif 530#define ASSERT_VOP_LOCKED(vp, str) 531#if 0 532#define ASSERT_VOP_SLOCKED(vp, str) 533#endif 534#define ASSERT_VOP_UNLOCKED(vp, str) 535#endif /* DEBUG_VFS_LOCKS */ 536 537/* 538 * VOCALL calls an op given an ops vector. We break it out because BSD's 539 * vclean changes the ops vector and then wants to call ops with the old 540 * vector. 541 */ 542#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 543 544/* 545 * This call works for vnodes in the kernel. 546 */ 547#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 548#define VDESC(OP) (& __CONCAT(OP,_desc)) 549#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 550 551/* 552 * VMIO support inline 553 */ 554 555extern int vmiodirenable; 556 557static __inline int 558vn_canvmio(struct vnode *vp) 559{ 560 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 561 return(TRUE); 562 return(FALSE); 563} 564 565/* 566 * Finally, include the default set of vnode operations. 567 */ 568#include "vnode_if.h" 569 570/* 571 * Public vnode manipulation functions. 572 */ 573struct componentname; 574struct file; 575struct mount; 576struct nameidata; 577struct ostat; 578struct thread; 579struct proc; 580struct stat; 581struct nstat; 582struct ucred; 583struct uio; 584struct vattr; 585struct vnode; 586 587extern int (*lease_check_hook)(struct vop_lease_args *); 588extern int (*softdep_fsync_hook)(struct vnode *); 589extern int (*softdep_process_worklist_hook)(struct mount *); 590 591struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev); 592int bdevvp(struct cdev *dev, struct vnode **vpp); 593/* cache_* may belong in namei.h. */ 594void cache_enter(struct vnode *dvp, struct vnode *vp, 595 struct componentname *cnp); 596int cache_lookup(struct vnode *dvp, struct vnode **vpp, 597 struct componentname *cnp); 598void cache_purge(struct vnode *vp); 599void cache_purgevfs(struct mount *mp); 600int cache_leaf_test(struct vnode *vp); 601int change_dir(struct vnode *vp, struct thread *td); 602int change_root(struct vnode *vp, struct thread *td); 603void cvtstat(struct stat *st, struct ostat *ost); 604void cvtnstat(struct stat *sb, struct nstat *nsb); 605int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 606 struct vnode **vpp); 607u_quad_t init_va_filerev(void); 608int lease_check(struct vop_lease_args *ap); 609int speedup_syncer(void); 610#define textvp_fullpath(p, rb, rfb) \ 611 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 612int vn_fullpath(struct thread *td, struct vnode *vn, 613 char **retbuf, char **freebuf); 614int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 615 mode_t acc_mode, struct ucred *cred, int *privused); 616int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 617 gid_t file_gid, struct acl *acl, mode_t acc_mode, 618 struct ucred *cred, int *privused); 619void vattr_null(struct vattr *vap); 620int vcount(struct vnode *vp); 621void vdrop(struct vnode *); 622void vdropl(struct vnode *); 623int vfinddev(struct cdev *dev, struct vnode **vpp); 624void vfs_add_vnodeops(const void *); 625void vfs_rm_vnodeops(const void *); 626int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 627int vget(struct vnode *vp, int lockflag, struct thread *td); 628void vgone(struct vnode *vp); 629void vgonel(struct vnode *vp, struct thread *td); 630void vhold(struct vnode *); 631void vholdl(struct vnode *); 632int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 633 struct thread *td, int slpflag, int slptimeo); 634int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 635 off_t length, int blksize); 636void vprint(char *label, struct vnode *vp); 637int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 638 struct thread *td); 639int vn_close(struct vnode *vp, 640 int flags, struct ucred *file_cred, struct thread *td); 641void vn_finished_write(struct mount *mp); 642int vn_isdisk(struct vnode *vp, int *errp); 643int vn_lock(struct vnode *vp, int flags, struct thread *td); 644#ifdef DEBUG_LOCKS 645int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 646 const char *filename, int line); 647#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 648#endif 649int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 650int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 651 struct ucred *cred, int fdidx); 652void vn_pollevent(struct vnode *vp, int events); 653void vn_pollgone(struct vnode *vp); 654int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 655int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 656 int len, off_t offset, enum uio_seg segflg, int ioflg, 657 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 658 struct thread *td); 659int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 660 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 661 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 662 struct thread *td); 663int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 664 struct ucred *file_cred, struct thread *td); 665int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 666int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 667 int flags); 668int vn_writechk(struct vnode *vp); 669int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 670 const char *attrname, int *buflen, char *buf, struct thread *td); 671int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 672 const char *attrname, int buflen, char *buf, struct thread *td); 673int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 674 const char *attrname, struct thread *td); 675int vfs_cache_lookup(struct vop_lookup_args *ap); 676int vfs_object_create(struct vnode *vp, struct thread *td, 677 struct ucred *cred); 678void vfs_timestamp(struct timespec *); 679void vfs_write_resume(struct mount *mp); 680int vfs_write_suspend(struct mount *mp); 681int vop_stdbmap(struct vop_bmap_args *); 682int vop_stdfsync(struct vop_fsync_args *); 683int vop_stdgetwritemount(struct vop_getwritemount_args *); 684int vop_stdgetpages(struct vop_getpages_args *); 685int vop_stdinactive(struct vop_inactive_args *); 686int vop_stdislocked(struct vop_islocked_args *); 687int vop_stdlock(struct vop_lock_args *); 688int vop_stdputpages(struct vop_putpages_args *); 689int vop_stdunlock(struct vop_unlock_args *); 690int vop_nopoll(struct vop_poll_args *); 691int vop_stdpathconf(struct vop_pathconf_args *); 692int vop_stdpoll(struct vop_poll_args *); 693int vop_revoke(struct vop_revoke_args *); 694int vop_eopnotsupp(struct vop_generic_args *ap); 695int vop_ebadf(struct vop_generic_args *ap); 696int vop_einval(struct vop_generic_args *ap); 697int vop_enotty(struct vop_generic_args *ap); 698int vop_defaultop(struct vop_generic_args *ap); 699int vop_null(struct vop_generic_args *ap); 700int vop_panic(struct vop_generic_args *ap); 701int vop_stdcreatevobject(struct vop_createvobject_args *ap); 702int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 703int vop_stdgetvobject(struct vop_getvobject_args *ap); 704 705void vfree(struct vnode *); 706void vput(struct vnode *vp); 707void vrele(struct vnode *vp); 708void vref(struct vnode *vp); 709int vrefcnt(struct vnode *vp); 710void vbusy(struct vnode *vp); 711void v_addpollinfo(struct vnode *vp); 712 713extern vop_t **default_vnodeop_p; 714extern vop_t **dead_vnodeop_p; 715extern vop_t **devfs_specop_p; 716 717#endif /* _KERNEL */ 718 719#endif /* !_SYS_VNODE_H_ */ 720