vnode.h revision 136938
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 136938 2004-10-25 06:02:57Z 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 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */ 134 enum vtype v_type; /* u vnode type */ 135 const char *v_tag; /* u type of underlying data */ 136 void *v_data; /* u private data for fs */ 137 struct lock v_lock; /* u used if fs don't have one */ 138 struct lock *v_vnlock; /* u pointer to vnode lock */ 139 vop_t **v_op; /* u vnode operations vector */ 140 struct mount *v_mount; /* u ptr to vfs we are in */ 141 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 142 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 143 u_long v_id; /* c capability identifier */ 144 struct vnode *v_dd; /* c .. vnode */ 145 u_long v_ddid; /* c .. capability identifier */ 146 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 147 struct label *v_label; /* MAC label for vnode */ 148#ifdef DEBUG_LOCKS 149 const char *filename; /* Source file doing locking */ 150 int line; /* Line number doing locking */ 151#endif 152 dev_t v_cachedfs; /* cached fs id */ 153 ino_t v_cachedid; /* cached file id */ 154 int v_bsize; /* block size for I/O */ 155}; 156 157#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 158 159#define v_mountedhere v_un.vu_mountedhere 160#define v_socket v_un.vu_socket 161#define v_rdev v_un.vu_spec.vu_cdev 162#define v_specnext v_un.vu_spec.vu_specnext 163#define v_fifoinfo v_un.vu_fifoinfo 164 165/* XXX: These are temporary to avoid a source sweep at this time */ 166#define v_object v_bufobj.bo_object 167#define v_cleanblkhd v_bufobj.bo_clean.bv_hd 168#define v_cleanblkroot v_bufobj.bo_clean.bv_root 169#define v_cleanbufcnt v_bufobj.bo_clean.bv_cnt 170#define v_dirtyblkhd v_bufobj.bo_dirty.bv_hd 171#define v_dirtyblkroot v_bufobj.bo_dirty.bv_root 172#define v_dirtybufcnt v_bufobj.bo_dirty.bv_cnt 173#define v_numoutput v_bufobj.bo_numoutput 174 175/* 176 * Userland version of struct vnode, for sysctl. 177 */ 178struct xvnode { 179 size_t xv_size; /* sizeof(struct xvnode) */ 180 void *xv_vnode; /* address of real vnode */ 181 u_long xv_flag; /* vnode vflags */ 182 int xv_usecount; /* reference count of users */ 183 int xv_writecount; /* reference count of writers */ 184 int xv_holdcnt; /* page & buffer references */ 185 u_long xv_id; /* capability identifier */ 186 void *xv_mount; /* address of parent mount */ 187 long xv_numoutput; /* num of writes in progress */ 188 enum vtype xv_type; /* vnode type */ 189 union { 190 void *xvu_socket; /* socket, if VSOCK */ 191 void *xvu_fifo; /* fifo, if VFIFO */ 192 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 193 struct { 194 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 195 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 196 } xv_uns; 197 } xv_un; 198}; 199#define xv_socket xv_un.xvu_socket 200#define xv_fifo xv_un.xvu_fifo 201#define xv_rdev xv_un.xvu_rdev 202#define xv_dev xv_un.xv_uns.xvu_dev 203#define xv_ino xv_un.xv_uns.xvu_ino 204 205#define VN_POLLEVENT(vp, events) \ 206 do { \ 207 if ((vp)->v_pollinfo != NULL && \ 208 (vp)->v_pollinfo->vpi_events & (events)) \ 209 vn_pollevent((vp), (events)); \ 210 } while (0) 211 212#define VN_KNOTE(vp, b, a) \ 213 do { \ 214 if ((vp)->v_pollinfo != NULL) \ 215 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 216 } while (0) 217#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 218#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 219 220/* 221 * Vnode flags. 222 * VI flags are protected by interlock and live in v_iflag 223 * VV flags are protected by the vnode lock and live in v_vflag 224 */ 225#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 226#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 227#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 228#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 229#define VI_MOUNT 0x0020 /* Mount in progress */ 230#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 231#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 232#define VI_FREE 0x0100 /* This vnode is on the freelist */ 233#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 234#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 235/* 236 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 237 * in v_synclist. 238 */ 239#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 240 241#define VV_ROOT 0x0001 /* root of its filesystem */ 242#define VV_ISTTY 0x0002 /* vnode represents a tty */ 243#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 244#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 245#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 246#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 247#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 248#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 249#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 250 251/* 252 * Vnode attributes. A field value of VNOVAL represents a field whose value 253 * is unavailable (getattr) or which is not to be changed (setattr). 254 */ 255struct vattr { 256 enum vtype va_type; /* vnode type (for create) */ 257 u_short va_mode; /* files access mode and type */ 258 short va_nlink; /* number of references to file */ 259 uid_t va_uid; /* owner user id */ 260 gid_t va_gid; /* owner group id */ 261 dev_t va_fsid; /* filesystem id */ 262 long va_fileid; /* file id */ 263 u_quad_t va_size; /* file size in bytes */ 264 long va_blocksize; /* blocksize preferred for i/o */ 265 struct timespec va_atime; /* time of last access */ 266 struct timespec va_mtime; /* time of last modification */ 267 struct timespec va_ctime; /* time file changed */ 268 struct timespec va_birthtime; /* time file created */ 269 u_long va_gen; /* generation number of file */ 270 u_long va_flags; /* flags defined for file */ 271 dev_t va_rdev; /* device the special file represents */ 272 u_quad_t va_bytes; /* bytes of disk space held by file */ 273 u_quad_t va_filerev; /* file modification number */ 274 u_int va_vaflags; /* operations flags, see below */ 275 long va_spare; /* remain quad aligned */ 276}; 277 278/* 279 * Flags for va_vaflags. 280 */ 281#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 282#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 283 284/* 285 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 286 * help with write clustering) 287 */ 288#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 289#define IO_APPEND 0x0002 /* append write to end */ 290#define IO_SYNC 0x0004 /* do I/O synchronously */ 291#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 292#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 293#define IO_VMIO 0x0020 /* data already in VMIO space */ 294#define IO_INVAL 0x0040 /* invalidate after I/O */ 295#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 296#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 297#define IO_EXT 0x0400 /* operate on external attributes */ 298#define IO_NORMAL 0x0800 /* operate on regular data */ 299#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 300 301#define IO_SEQMAX 0x7F /* seq heuristic max value */ 302#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 303 304/* 305 * Modes. Some values same as Ixxx entries from inode.h for now. 306 */ 307#define VEXEC 000100 /* execute/search permission */ 308#define VWRITE 000200 /* write permission */ 309#define VREAD 000400 /* read permission */ 310#define VSVTX 001000 /* save swapped text even after use */ 311#define VSGID 002000 /* set group id on execution */ 312#define VSUID 004000 /* set user id on execution */ 313#define VADMIN 010000 /* permission to administer */ 314#define VSTAT 020000 /* permission to retrieve attrs */ 315#define VAPPEND 040000 /* permission to write/append */ 316#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 317 318/* 319 * Token indicating no attribute value yet assigned. 320 */ 321#define VNOVAL (-1) 322 323/* 324 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 325 */ 326#define VLKTIMEOUT (hz / 20 + 1) 327 328#ifdef _KERNEL 329 330#ifdef MALLOC_DECLARE 331MALLOC_DECLARE(M_VNODE); 332#endif 333 334/* 335 * Convert between vnode types and inode formats (since POSIX.1 336 * defines mode word of stat structure in terms of inode formats). 337 */ 338extern enum vtype iftovt_tab[]; 339extern int vttoif_tab[]; 340#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 341#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 342#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 343 344/* 345 * Flags to various vnode functions. 346 */ 347#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 348#define FORCECLOSE 0x0002 /* vflush: force file closure */ 349#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 350#define DOCLOSE 0x0008 /* vclean: close active files */ 351#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 352#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 353#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 354#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 355#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 356#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 357#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 358 359#define VREF(vp) vref(vp) 360 361#ifdef DIAGNOSTIC 362#define VATTR_NULL(vap) vattr_null(vap) 363#else 364#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 365#endif /* DIAGNOSTIC */ 366 367#define NULLVP ((struct vnode *)NULL) 368 369#define VNODEOP_SET(f) \ 370 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 371 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 372 373/* 374 * Global vnode data. 375 */ 376extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 377extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 378extern int desiredvnodes; /* number of vnodes desired */ 379extern struct uma_zone *namei_zone; 380extern int prtactive; /* nonzero to call vprint() */ 381extern struct vattr va_null; /* predefined null vattr structure */ 382 383/* 384 * Macro/function to check for client cache inconsistency w.r.t. leasing. 385 */ 386#define LEASE_READ 0x1 /* Check lease for readers */ 387#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 388 389extern void (*lease_updatetime)(int deltat); 390 391/* Requires interlock. */ 392#define VSHOULDFREE(vp) \ 393 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 394 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 395 (!(vp)->v_object || \ 396 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 397 398/* Requires interlock. */ 399#define VMIGHTFREE(vp) \ 400 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 401 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 402 403/* Requires interlock. */ 404#define VSHOULDBUSY(vp) \ 405 (((vp)->v_iflag & VI_FREE) && \ 406 ((vp)->v_holdcnt || (vp)->v_usecount)) 407 408#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 409#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 410#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 411#define VI_MTX(vp) (&(vp)->v_interlock) 412 413#endif /* _KERNEL */ 414 415/* 416 * Mods for extensibility. 417 */ 418 419/* 420 * Flags for vdesc_flags: 421 */ 422#define VDESC_MAX_VPS 16 423/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 424#define VDESC_VP0_WILLRELE 0x0001 425#define VDESC_VP1_WILLRELE 0x0002 426#define VDESC_VP2_WILLRELE 0x0004 427#define VDESC_VP3_WILLRELE 0x0008 428#define VDESC_NOMAP_VPP 0x0100 429#define VDESC_VPP_WILLRELE 0x0200 430 431/* 432 * VDESC_NO_OFFSET is used to identify the end of the offset list 433 * and in places where no such field exists. 434 */ 435#define VDESC_NO_OFFSET -1 436 437/* 438 * This structure describes the vnode operation taking place. 439 */ 440struct vnodeop_desc { 441 int vdesc_offset; /* offset in vector,first for speed */ 442 char *vdesc_name; /* a readable name for debugging */ 443 int vdesc_flags; /* VDESC_* flags */ 444 445 /* 446 * These ops are used by bypass routines to map and locate arguments. 447 * Creds and procs are not needed in bypass routines, but sometimes 448 * they are useful to (for example) transport layers. 449 * Nameidata is useful because it has a cred in it. 450 */ 451 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 452 int vdesc_vpp_offset; /* return vpp location */ 453 int vdesc_cred_offset; /* cred location, if any */ 454 int vdesc_thread_offset; /* thread location, if any */ 455 int vdesc_componentname_offset; /* if any */ 456 /* 457 * Finally, we've got a list of private data (about each operation) 458 * for each transport layer. (Support to manage this list is not 459 * yet part of BSD.) 460 */ 461 caddr_t *vdesc_transports; 462}; 463 464#ifdef _KERNEL 465/* 466 * A list of all the operation descs. 467 */ 468extern struct vnodeop_desc *vnodeop_descs[]; 469 470#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 471#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 472 ((s_type)(((char*)(struct_p)) + (s_offset))) 473 474/* 475 * This structure is used to configure the new vnodeops vector. 476 */ 477struct vnodeopv_entry_desc { 478 struct vnodeop_desc *opve_op; /* which operation this is */ 479 vop_t *opve_impl; /* code implementing this operation */ 480}; 481struct vnodeopv_desc { 482 /* ptr to the ptr to the vector where op should go */ 483 vop_t ***opv_desc_vector_p; 484 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 485}; 486 487/* 488 * A generic structure. 489 * This can be used by bypass routines to identify generic arguments. 490 */ 491struct vop_generic_args { 492 struct vnodeop_desc *a_desc; 493 /* other random data follows, presumably */ 494}; 495 496#ifdef DEBUG_VFS_LOCKS 497/* 498 * Support code to aid in debugging VFS locking problems. Not totally 499 * reliable since if the thread sleeps between changing the lock 500 * state and checking it with the assert, some other thread could 501 * change the state. They are good enough for debugging a single 502 * filesystem using a single-threaded test. 503 */ 504void assert_vi_locked(struct vnode *vp, const char *str); 505void assert_vi_unlocked(struct vnode *vp, const char *str); 506#if 0 507void assert_vop_elocked(struct vnode *vp, const char *str); 508void assert_vop_elocked_other(struct vnode *vp, const char *str); 509#endif 510void assert_vop_locked(struct vnode *vp, const char *str); 511#if 0 512voi0 assert_vop_slocked(struct vnode *vp, const char *str); 513#endif 514void assert_vop_unlocked(struct vnode *vp, const char *str); 515 516/* These are called from within the actual VOPS. */ 517void vop_lock_pre(void *a); 518void vop_lock_post(void *a, int rc); 519void vop_lookup_post(void *a, int rc); 520void vop_lookup_pre(void *a); 521void vop_rename_pre(void *a); 522void vop_strategy_pre(void *a); 523void vop_unlock_post(void *a, int rc); 524void vop_unlock_pre(void *a); 525 526#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 527#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 528#if 0 529#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 530#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 531#endif 532#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 533#if 0 534#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 535#endif 536#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 537 538#else /* !DEBUG_VFS_LOCKS */ 539 540#define ASSERT_VI_LOCKED(vp, str) 541#define ASSERT_VI_UNLOCKED(vp, str) 542#if 0 543#define ASSERT_VOP_ELOCKED(vp, str) 544#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 545#endif 546#define ASSERT_VOP_LOCKED(vp, str) 547#if 0 548#define ASSERT_VOP_SLOCKED(vp, str) 549#endif 550#define ASSERT_VOP_UNLOCKED(vp, str) 551#endif /* DEBUG_VFS_LOCKS */ 552 553/* 554 * VOCALL calls an op given an ops vector. We break it out because BSD's 555 * vclean changes the ops vector and then wants to call ops with the old 556 * vector. 557 */ 558#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 559 560/* 561 * This call works for vnodes in the kernel. 562 */ 563#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 564#define VDESC(OP) (& __CONCAT(OP,_desc)) 565#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 566 567/* 568 * VMIO support inline 569 */ 570 571extern int vmiodirenable; 572 573static __inline int 574vn_canvmio(struct vnode *vp) 575{ 576 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 577 return(TRUE); 578 return(FALSE); 579} 580 581/* 582 * Finally, include the default set of vnode operations. 583 */ 584#include "vnode_if.h" 585 586/* 587 * Public vnode manipulation functions. 588 */ 589struct componentname; 590struct file; 591struct mount; 592struct nameidata; 593struct ostat; 594struct thread; 595struct proc; 596struct stat; 597struct nstat; 598struct ucred; 599struct uio; 600struct vattr; 601struct vnode; 602 603extern int (*lease_check_hook)(struct vop_lease_args *); 604extern int (*softdep_fsync_hook)(struct vnode *); 605extern int (*softdep_process_worklist_hook)(struct mount *); 606 607struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev); 608int bdevvp(struct cdev *dev, struct vnode **vpp); 609/* cache_* may belong in namei.h. */ 610void cache_enter(struct vnode *dvp, struct vnode *vp, 611 struct componentname *cnp); 612int cache_lookup(struct vnode *dvp, struct vnode **vpp, 613 struct componentname *cnp); 614void cache_purge(struct vnode *vp); 615void cache_purgevfs(struct mount *mp); 616int cache_leaf_test(struct vnode *vp); 617int change_dir(struct vnode *vp, struct thread *td); 618int change_root(struct vnode *vp, struct thread *td); 619void cvtstat(struct stat *st, struct ostat *ost); 620void cvtnstat(struct stat *sb, struct nstat *nsb); 621int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 622 struct vnode **vpp); 623u_quad_t init_va_filerev(void); 624int lease_check(struct vop_lease_args *ap); 625int speedup_syncer(void); 626#define textvp_fullpath(p, rb, rfb) \ 627 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 628int vn_fullpath(struct thread *td, struct vnode *vn, 629 char **retbuf, char **freebuf); 630int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 631 mode_t acc_mode, struct ucred *cred, int *privused); 632int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 633 gid_t file_gid, struct acl *acl, mode_t acc_mode, 634 struct ucred *cred, int *privused); 635void vattr_null(struct vattr *vap); 636int vcount(struct vnode *vp); 637void vdrop(struct vnode *); 638void vdropl(struct vnode *); 639int vfinddev(struct cdev *dev, struct vnode **vpp); 640void vfs_add_vnodeops(const void *); 641void vfs_rm_vnodeops(const void *); 642int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 643int vget(struct vnode *vp, int lockflag, struct thread *td); 644void vgone(struct vnode *vp); 645void vgonel(struct vnode *vp, struct thread *td); 646void vhold(struct vnode *); 647void vholdl(struct vnode *); 648int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 649 struct thread *td, int slpflag, int slptimeo); 650int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 651 off_t length, int blksize); 652void vprint(char *label, struct vnode *vp); 653int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 654 struct thread *td); 655int vn_close(struct vnode *vp, 656 int flags, struct ucred *file_cred, struct thread *td); 657void vn_finished_write(struct mount *mp); 658int vn_isdisk(struct vnode *vp, int *errp); 659int vn_lock(struct vnode *vp, int flags, struct thread *td); 660#ifdef DEBUG_LOCKS 661int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 662 const char *filename, int line); 663#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 664#endif 665int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 666int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 667 struct ucred *cred, int fdidx); 668void vn_pollevent(struct vnode *vp, int events); 669void vn_pollgone(struct vnode *vp); 670int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 671int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 672 int len, off_t offset, enum uio_seg segflg, int ioflg, 673 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 674 struct thread *td); 675int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 676 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 677 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 678 struct thread *td); 679int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 680 struct ucred *file_cred, struct thread *td); 681int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 682struct cdev *vn_todev(struct vnode *vp); 683int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 684 int flags); 685int vn_writechk(struct vnode *vp); 686int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 687 const char *attrname, int *buflen, char *buf, struct thread *td); 688int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 689 const char *attrname, int buflen, char *buf, struct thread *td); 690int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 691 const char *attrname, struct thread *td); 692int vfs_cache_lookup(struct vop_lookup_args *ap); 693int vfs_object_create(struct vnode *vp, struct thread *td, 694 struct ucred *cred); 695void vfs_timestamp(struct timespec *); 696void vfs_write_resume(struct mount *mp); 697int vfs_write_suspend(struct mount *mp); 698int vop_stdbmap(struct vop_bmap_args *); 699int vop_stdfsync(struct vop_fsync_args *); 700int vop_stdgetwritemount(struct vop_getwritemount_args *); 701int vop_stdgetpages(struct vop_getpages_args *); 702int vop_stdinactive(struct vop_inactive_args *); 703int vop_stdislocked(struct vop_islocked_args *); 704int vop_stdlock(struct vop_lock_args *); 705int vop_stdputpages(struct vop_putpages_args *); 706int vop_stdunlock(struct vop_unlock_args *); 707int vop_nopoll(struct vop_poll_args *); 708int vop_stdpathconf(struct vop_pathconf_args *); 709int vop_stdpoll(struct vop_poll_args *); 710int vop_revoke(struct vop_revoke_args *); 711int vop_eopnotsupp(struct vop_generic_args *ap); 712int vop_ebadf(struct vop_generic_args *ap); 713int vop_einval(struct vop_generic_args *ap); 714int vop_enotty(struct vop_generic_args *ap); 715int vop_defaultop(struct vop_generic_args *ap); 716int vop_null(struct vop_generic_args *ap); 717int vop_panic(struct vop_generic_args *ap); 718int vop_stdcreatevobject(struct vop_createvobject_args *ap); 719int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 720int vop_stdgetvobject(struct vop_getvobject_args *ap); 721 722void vfree(struct vnode *); 723void vput(struct vnode *vp); 724void vrele(struct vnode *vp); 725void vref(struct vnode *vp); 726int vrefcnt(struct vnode *vp); 727void vbusy(struct vnode *vp); 728void v_addpollinfo(struct vnode *vp); 729 730extern vop_t **default_vnodeop_p; 731extern vop_t **dead_vnodeop_p; 732extern vop_t **devfs_specop_p; 733 734#endif /* _KERNEL */ 735 736#endif /* !_SYS_VNODE_H_ */ 737