vnode.h revision 131565
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 131565 2004-07-04 12:49:04Z 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/queue.h> 43#include <sys/_lock.h> 44#include <sys/lock.h> 45#include <sys/_mutex.h> 46#include <sys/mutex.h> 47#include <sys/selinfo.h> 48#include <sys/uio.h> 49#include <sys/acl.h> 50#include <sys/ktr.h> 51 52/* 53 * The vnode is the focus of all file activity in UNIX. There is a 54 * unique vnode allocated for each active file, each current directory, 55 * each mounted-on file, text file, and the root. 56 */ 57 58/* 59 * Vnode types. VNON means no type. 60 */ 61enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 62 63/* 64 * Each underlying filesystem allocates its own private area and hangs 65 * it from v_data. If non-null, this area is freed in getnewvnode(). 66 */ 67TAILQ_HEAD(buflists, buf); 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 * 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 106struct vnode { 107 struct mtx v_interlock; /* lock for "i" things */ 108 u_long v_iflag; /* i vnode flags (see below) */ 109 int v_usecount; /* i ref count of users */ 110 long v_numoutput; /* i writes in progress */ 111 struct thread *v_vxthread; /* i thread owning VXLOCK */ 112 int v_holdcnt; /* i page & buffer references */ 113 struct buflists v_cleanblkhd; /* i SORTED clean blocklist */ 114 struct buf *v_cleanblkroot; /* i clean buf splay tree */ 115 int v_cleanbufcnt; /* i number of clean buffers */ 116 struct buflists v_dirtyblkhd; /* i SORTED dirty blocklist */ 117 struct buf *v_dirtyblkroot; /* i dirty buf splay tree */ 118 int v_dirtybufcnt; /* i number of dirty buffers */ 119 u_long v_vflag; /* v vnode flags */ 120 int v_writecount; /* v ref count of writers */ 121 struct vm_object *v_object; /* v Place to store VM object */ 122 daddr_t v_lastw; /* v last write (write cluster) */ 123 daddr_t v_cstart; /* v start block of cluster */ 124 daddr_t v_lasta; /* v last allocation (cluster) */ 125 int v_clen; /* v length of current cluster */ 126 union { 127 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 128 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 129 struct { 130 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 131 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 132 } vu_spec; 133 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 134 } v_un; 135 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 136 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 137 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */ 138 enum vtype v_type; /* u vnode type */ 139 const char *v_tag; /* u type of underlying data */ 140 void *v_data; /* u private data for fs */ 141 struct lock v_lock; /* u used if fs don't have one */ 142 struct lock *v_vnlock; /* u pointer to vnode lock */ 143 vop_t **v_op; /* u vnode operations vector */ 144 struct mount *v_mount; /* u ptr to vfs we are in */ 145 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 146 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 147 u_long v_id; /* c capability identifier */ 148 struct vnode *v_dd; /* c .. vnode */ 149 u_long v_ddid; /* c .. capability identifier */ 150 struct vpollinfo *v_pollinfo; /* p Poll events */ 151 struct label *v_label; /* MAC label for vnode */ 152#ifdef DEBUG_LOCKS 153 const char *filename; /* Source file doing locking */ 154 int line; /* Line number doing locking */ 155#endif 156 dev_t v_cachedfs; /* cached fs id */ 157 ino_t v_cachedid; /* cached file id */ 158 int v_bsize; /* block size for I/O */ 159}; 160#define v_mountedhere v_un.vu_mountedhere 161#define v_socket v_un.vu_socket 162#define v_rdev v_un.vu_spec.vu_cdev 163#define v_specnext v_un.vu_spec.vu_specnext 164#define v_fifoinfo v_un.vu_fifoinfo 165 166/* 167 * Userland version of struct vnode, for sysctl. 168 */ 169struct xvnode { 170 size_t xv_size; /* sizeof(struct xvnode) */ 171 void *xv_vnode; /* address of real vnode */ 172 u_long xv_flag; /* vnode vflags */ 173 int xv_usecount; /* reference count of users */ 174 int xv_writecount; /* reference count of writers */ 175 int xv_holdcnt; /* page & buffer references */ 176 u_long xv_id; /* capability identifier */ 177 void *xv_mount; /* address of parent mount */ 178 long xv_numoutput; /* num of writes in progress */ 179 enum vtype xv_type; /* vnode type */ 180 union { 181 void *xvu_socket; /* socket, if VSOCK */ 182 void *xvu_fifo; /* fifo, if VFIFO */ 183 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 184 struct { 185 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 186 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 187 } xv_uns; 188 } xv_un; 189}; 190#define xv_socket xv_un.xvu_socket 191#define xv_fifo xv_un.xvu_fifo 192#define xv_rdev xv_un.xvu_rdev 193#define xv_dev xv_un.xv_uns.xvu_dev 194#define xv_ino xv_un.xv_uns.xvu_ino 195 196#define VN_POLLEVENT(vp, events) \ 197 do { \ 198 if ((vp)->v_pollinfo != NULL && \ 199 (vp)->v_pollinfo->vpi_events & (events)) \ 200 vn_pollevent((vp), (events)); \ 201 } while (0) 202 203#define VN_KNOTE(vp, b) \ 204 do { \ 205 if ((vp)->v_pollinfo != NULL) \ 206 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 207 } while (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_BWAIT 0x0004 /* waiting for output to complete */ 217#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 218#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 219#define VI_MOUNT 0x0020 /* Mount in progress */ 220#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 221#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 222#define VI_FREE 0x0100 /* This vnode is on the freelist */ 223#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 224#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 225/* 226 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 227 * in v_synclist. 228 */ 229#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 230 231#define VV_ROOT 0x0001 /* root of its filesystem */ 232#define VV_ISTTY 0x0002 /* vnode represents a tty */ 233#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 234#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 235#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 236#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 237#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 238#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 239#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 240 241/* 242 * Vnode attributes. A field value of VNOVAL represents a field whose value 243 * is unavailable (getattr) or which is not to be changed (setattr). 244 */ 245struct vattr { 246 enum vtype va_type; /* vnode type (for create) */ 247 u_short va_mode; /* files access mode and type */ 248 short va_nlink; /* number of references to file */ 249 uid_t va_uid; /* owner user id */ 250 gid_t va_gid; /* owner group id */ 251 dev_t va_fsid; /* filesystem id */ 252 long va_fileid; /* file id */ 253 u_quad_t va_size; /* file size in bytes */ 254 long va_blocksize; /* blocksize preferred for i/o */ 255 struct timespec va_atime; /* time of last access */ 256 struct timespec va_mtime; /* time of last modification */ 257 struct timespec va_ctime; /* time file changed */ 258 struct timespec va_birthtime; /* time file created */ 259 u_long va_gen; /* generation number of file */ 260 u_long va_flags; /* flags defined for file */ 261 dev_t va_rdev; /* device the special file represents */ 262 u_quad_t va_bytes; /* bytes of disk space held by file */ 263 u_quad_t va_filerev; /* file modification number */ 264 u_int va_vaflags; /* operations flags, see below */ 265 long va_spare; /* remain quad aligned */ 266}; 267 268/* 269 * Flags for va_vaflags. 270 */ 271#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 272#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 273 274/* 275 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 276 * help with write clustering) 277 */ 278#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 279#define IO_APPEND 0x0002 /* append write to end */ 280#define IO_SYNC 0x0004 /* do I/O synchronously */ 281#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 282#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 283#define IO_VMIO 0x0020 /* data already in VMIO space */ 284#define IO_INVAL 0x0040 /* invalidate after I/O */ 285#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 286#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 287#define IO_EXT 0x0400 /* operate on external attributes */ 288#define IO_NORMAL 0x0800 /* operate on regular data */ 289#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 290 291#define IO_SEQMAX 0x7F /* seq heuristic max value */ 292#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 293 294/* 295 * Modes. Some values same as Ixxx entries from inode.h for now. 296 */ 297#define VEXEC 000100 /* execute/search permission */ 298#define VWRITE 000200 /* write permission */ 299#define VREAD 000400 /* read permission */ 300#define VSVTX 001000 /* save swapped text even after use */ 301#define VSGID 002000 /* set group id on execution */ 302#define VSUID 004000 /* set user id on execution */ 303#define VADMIN 010000 /* permission to administer */ 304#define VSTAT 020000 /* permission to retrieve attrs */ 305#define VAPPEND 040000 /* permission to write/append */ 306#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 307 308/* 309 * Token indicating no attribute value yet assigned. 310 */ 311#define VNOVAL (-1) 312 313/* 314 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 315 */ 316#define VLKTIMEOUT (hz / 20 + 1) 317 318#ifdef _KERNEL 319 320#ifdef MALLOC_DECLARE 321MALLOC_DECLARE(M_VNODE); 322#endif 323 324/* 325 * Convert between vnode types and inode formats (since POSIX.1 326 * defines mode word of stat structure in terms of inode formats). 327 */ 328extern enum vtype iftovt_tab[]; 329extern int vttoif_tab[]; 330#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 331#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 332#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 333 334/* 335 * Flags to various vnode functions. 336 */ 337#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 338#define FORCECLOSE 0x0002 /* vflush: force file closure */ 339#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 340#define DOCLOSE 0x0008 /* vclean: close active files */ 341#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 342#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 343#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 344#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 345#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 346#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 347#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 348 349#define VREF(vp) vref(vp) 350 351#ifdef DIAGNOSTIC 352#define VATTR_NULL(vap) vattr_null(vap) 353#else 354#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 355#endif /* DIAGNOSTIC */ 356 357#define NULLVP ((struct vnode *)NULL) 358 359#define VNODEOP_SET(f) \ 360 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 361 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 362 363/* 364 * Global vnode data. 365 */ 366extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 367extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 368extern int desiredvnodes; /* number of vnodes desired */ 369extern struct uma_zone *namei_zone; 370extern int prtactive; /* nonzero to call vprint() */ 371extern struct vattr va_null; /* predefined null vattr structure */ 372 373/* 374 * Macro/function to check for client cache inconsistency w.r.t. leasing. 375 */ 376#define LEASE_READ 0x1 /* Check lease for readers */ 377#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 378 379extern void (*lease_updatetime)(int deltat); 380 381/* Requires interlock. */ 382#define VSHOULDFREE(vp) \ 383 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 384 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 385 (!(vp)->v_object || \ 386 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 387 388/* Requires interlock. */ 389#define VMIGHTFREE(vp) \ 390 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 391 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 392 393/* Requires interlock. */ 394#define VSHOULDBUSY(vp) \ 395 (((vp)->v_iflag & VI_FREE) && \ 396 ((vp)->v_holdcnt || (vp)->v_usecount)) 397 398#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 399#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 400#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 401#define VI_MTX(vp) (&(vp)->v_interlock) 402 403#endif /* _KERNEL */ 404 405/* 406 * Mods for extensibility. 407 */ 408 409/* 410 * Flags for vdesc_flags: 411 */ 412#define VDESC_MAX_VPS 16 413/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 414#define VDESC_VP0_WILLRELE 0x0001 415#define VDESC_VP1_WILLRELE 0x0002 416#define VDESC_VP2_WILLRELE 0x0004 417#define VDESC_VP3_WILLRELE 0x0008 418#define VDESC_NOMAP_VPP 0x0100 419#define VDESC_VPP_WILLRELE 0x0200 420 421/* 422 * VDESC_NO_OFFSET is used to identify the end of the offset list 423 * and in places where no such field exists. 424 */ 425#define VDESC_NO_OFFSET -1 426 427/* 428 * This structure describes the vnode operation taking place. 429 */ 430struct vnodeop_desc { 431 int vdesc_offset; /* offset in vector,first for speed */ 432 char *vdesc_name; /* a readable name for debugging */ 433 int vdesc_flags; /* VDESC_* flags */ 434 435 /* 436 * These ops are used by bypass routines to map and locate arguments. 437 * Creds and procs are not needed in bypass routines, but sometimes 438 * they are useful to (for example) transport layers. 439 * Nameidata is useful because it has a cred in it. 440 */ 441 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 442 int vdesc_vpp_offset; /* return vpp location */ 443 int vdesc_cred_offset; /* cred location, if any */ 444 int vdesc_thread_offset; /* thread location, if any */ 445 int vdesc_componentname_offset; /* if any */ 446 /* 447 * Finally, we've got a list of private data (about each operation) 448 * for each transport layer. (Support to manage this list is not 449 * yet part of BSD.) 450 */ 451 caddr_t *vdesc_transports; 452}; 453 454#ifdef _KERNEL 455/* 456 * A list of all the operation descs. 457 */ 458extern struct vnodeop_desc *vnodeop_descs[]; 459 460#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 461#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 462 ((s_type)(((char*)(struct_p)) + (s_offset))) 463 464/* 465 * This structure is used to configure the new vnodeops vector. 466 */ 467struct vnodeopv_entry_desc { 468 struct vnodeop_desc *opve_op; /* which operation this is */ 469 vop_t *opve_impl; /* code implementing this operation */ 470}; 471struct vnodeopv_desc { 472 /* ptr to the ptr to the vector where op should go */ 473 vop_t ***opv_desc_vector_p; 474 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 475}; 476 477/* 478 * A generic structure. 479 * This can be used by bypass routines to identify generic arguments. 480 */ 481struct vop_generic_args { 482 struct vnodeop_desc *a_desc; 483 /* other random data follows, presumably */ 484}; 485 486#ifdef DEBUG_VFS_LOCKS 487/* 488 * Support code to aid in debugging VFS locking problems. Not totally 489 * reliable since if the thread sleeps between changing the lock 490 * state and checking it with the assert, some other thread could 491 * change the state. They are good enough for debugging a single 492 * filesystem using a single-threaded test. 493 */ 494void assert_vi_locked(struct vnode *vp, const char *str); 495void assert_vi_unlocked(struct vnode *vp, const char *str); 496#if 0 497void assert_vop_elocked(struct vnode *vp, const char *str); 498void assert_vop_elocked_other(struct vnode *vp, const char *str); 499#endif 500void assert_vop_locked(struct vnode *vp, const char *str); 501#if 0 502voi0 assert_vop_slocked(struct vnode *vp, const char *str); 503#endif 504void assert_vop_unlocked(struct vnode *vp, const char *str); 505 506/* These are called from within the actual VOPS. */ 507void vop_lock_pre(void *a); 508void vop_lock_post(void *a, int rc); 509void vop_lookup_post(void *a, int rc); 510void vop_lookup_pre(void *a); 511void vop_rename_pre(void *a); 512void vop_strategy_pre(void *a); 513void vop_unlock_post(void *a, int rc); 514void vop_unlock_pre(void *a); 515 516#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 517#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 518#if 0 519#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 520#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 521#endif 522#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 523#if 0 524#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 525#endif 526#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 527 528#else /* !DEBUG_VFS_LOCKS */ 529 530#define ASSERT_VI_LOCKED(vp, str) 531#define ASSERT_VI_UNLOCKED(vp, str) 532#if 0 533#define ASSERT_VOP_ELOCKED(vp, str) 534#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 535#endif 536#define ASSERT_VOP_LOCKED(vp, str) 537#if 0 538#define ASSERT_VOP_SLOCKED(vp, str) 539#endif 540#define ASSERT_VOP_UNLOCKED(vp, str) 541#endif /* DEBUG_VFS_LOCKS */ 542 543/* 544 * VOCALL calls an op given an ops vector. We break it out because BSD's 545 * vclean changes the ops vector and then wants to call ops with the old 546 * vector. 547 */ 548#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 549 550/* 551 * This call works for vnodes in the kernel. 552 */ 553#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 554#define VDESC(OP) (& __CONCAT(OP,_desc)) 555#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 556 557/* 558 * VMIO support inline 559 */ 560 561extern int vmiodirenable; 562 563static __inline int 564vn_canvmio(struct vnode *vp) 565{ 566 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 567 return(TRUE); 568 return(FALSE); 569} 570 571/* 572 * Finally, include the default set of vnode operations. 573 */ 574#include "vnode_if.h" 575 576/* 577 * Public vnode manipulation functions. 578 */ 579struct componentname; 580struct file; 581struct mount; 582struct nameidata; 583struct ostat; 584struct thread; 585struct proc; 586struct stat; 587struct nstat; 588struct ucred; 589struct uio; 590struct vattr; 591struct vnode; 592 593extern int (*lease_check_hook)(struct vop_lease_args *); 594extern int (*softdep_fsync_hook)(struct vnode *); 595extern int (*softdep_process_worklist_hook)(struct mount *); 596 597struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev); 598int bdevvp(struct cdev *dev, struct vnode **vpp); 599/* cache_* may belong in namei.h. */ 600void cache_enter(struct vnode *dvp, struct vnode *vp, 601 struct componentname *cnp); 602int cache_lookup(struct vnode *dvp, struct vnode **vpp, 603 struct componentname *cnp); 604void cache_purge(struct vnode *vp); 605void cache_purgevfs(struct mount *mp); 606int cache_leaf_test(struct vnode *vp); 607int change_dir(struct vnode *vp, struct thread *td); 608int change_root(struct vnode *vp, struct thread *td); 609void cvtstat(struct stat *st, struct ostat *ost); 610void cvtnstat(struct stat *sb, struct nstat *nsb); 611int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 612 struct vnode **vpp); 613int lease_check(struct vop_lease_args *ap); 614int spec_vnoperate(struct vop_generic_args *); 615int speedup_syncer(void); 616#define textvp_fullpath(p, rb, rfb) \ 617 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 618int vn_fullpath(struct thread *td, struct vnode *vn, 619 char **retbuf, char **freebuf); 620int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 621 mode_t acc_mode, struct ucred *cred, int *privused); 622int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 623 gid_t file_gid, struct acl *acl, mode_t acc_mode, 624 struct ucred *cred, int *privused); 625void vattr_null(struct vattr *vap); 626int vcount(struct vnode *vp); 627void vdrop(struct vnode *); 628void vdropl(struct vnode *); 629int vfinddev(struct cdev *dev, struct vnode **vpp); 630void vfs_add_vnodeops(const void *); 631void vfs_rm_vnodeops(const void *); 632int vflush(struct mount *mp, int rootrefs, int flags); 633int vget(struct vnode *vp, int lockflag, struct thread *td); 634void vgone(struct vnode *vp); 635void vgonel(struct vnode *vp, struct thread *td); 636void vhold(struct vnode *); 637void vholdl(struct vnode *); 638int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 639 struct thread *td, int slpflag, int slptimeo); 640int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 641 off_t length, int blksize); 642void vprint(char *label, struct vnode *vp); 643int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 644 struct thread *td); 645int vn_close(struct vnode *vp, 646 int flags, struct ucred *file_cred, struct thread *td); 647void vn_finished_write(struct mount *mp); 648int vn_isdisk(struct vnode *vp, int *errp); 649int vn_lock(struct vnode *vp, int flags, struct thread *td); 650#ifdef DEBUG_LOCKS 651int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 652 const char *filename, int line); 653#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 654#endif 655int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 656int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 657 struct ucred *cred, int fdidx); 658void vn_pollevent(struct vnode *vp, int events); 659void vn_pollgone(struct vnode *vp); 660int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 661int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 662 int len, off_t offset, enum uio_seg segflg, int ioflg, 663 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 664 struct thread *td); 665int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 666 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 667 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 668 struct thread *td); 669int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 670 struct ucred *file_cred, struct thread *td); 671int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 672struct cdev *vn_todev(struct vnode *vp); 673int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 674 int flags); 675int vn_writechk(struct vnode *vp); 676int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 677 const char *attrname, int *buflen, char *buf, struct thread *td); 678int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 679 const char *attrname, int buflen, char *buf, struct thread *td); 680int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 681 const char *attrname, struct thread *td); 682int vfs_cache_lookup(struct vop_lookup_args *ap); 683int vfs_object_create(struct vnode *vp, struct thread *td, 684 struct ucred *cred); 685void vfs_timestamp(struct timespec *); 686void vfs_write_resume(struct mount *mp); 687int vfs_write_suspend(struct mount *mp); 688int vop_stdbmap(struct vop_bmap_args *); 689int vop_stdfsync(struct vop_fsync_args *); 690int vop_stdgetwritemount(struct vop_getwritemount_args *); 691int vop_stdgetpages(struct vop_getpages_args *); 692int vop_stdinactive(struct vop_inactive_args *); 693int vop_stdislocked(struct vop_islocked_args *); 694int vop_stdlock(struct vop_lock_args *); 695int vop_stdputpages(struct vop_putpages_args *); 696int vop_stdunlock(struct vop_unlock_args *); 697int vop_nopoll(struct vop_poll_args *); 698int vop_stdpathconf(struct vop_pathconf_args *); 699int vop_stdpoll(struct vop_poll_args *); 700int vop_revoke(struct vop_revoke_args *); 701int vop_eopnotsupp(struct vop_generic_args *ap); 702int vop_ebadf(struct vop_generic_args *ap); 703int vop_einval(struct vop_generic_args *ap); 704int vop_enotty(struct vop_generic_args *ap); 705int vop_defaultop(struct vop_generic_args *ap); 706int vop_null(struct vop_generic_args *ap); 707int vop_panic(struct vop_generic_args *ap); 708int vop_stdcreatevobject(struct vop_createvobject_args *ap); 709int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 710int vop_stdgetvobject(struct vop_getvobject_args *ap); 711 712void vfree(struct vnode *); 713void vput(struct vnode *vp); 714void vrele(struct vnode *vp); 715void vref(struct vnode *vp); 716int vrefcnt(struct vnode *vp); 717void vbusy(struct vnode *vp); 718void v_addpollinfo(struct vnode *vp); 719 720extern vop_t **default_vnodeop_p; 721extern vop_t **spec_vnodeop_p; 722extern vop_t **dead_vnodeop_p; 723 724#endif /* _KERNEL */ 725 726#endif /* !_SYS_VNODE_H_ */ 727