vnode.h revision 136746
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 136745 2004-10-21 12:24:38Z 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 long v_numoutput; /* i writes in progress */ 114 struct thread *v_vxthread; /* i thread owning VXLOCK */ 115 int v_holdcnt; /* i page & buffer references */ 116 struct bufobj v_bufobj; /* * Buffer cache object */ 117 u_long v_vflag; /* v vnode flags */ 118 int v_writecount; /* v ref count of writers */ 119 struct vm_object *v_object; /* v Place to store VM object */ 120 daddr_t v_lastw; /* v last write (write cluster) */ 121 daddr_t v_cstart; /* v start block of cluster */ 122 daddr_t v_lasta; /* v last allocation (cluster) */ 123 int v_clen; /* v length of current cluster */ 124 union { 125 struct mount *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */ 126 struct socket *vu_socket; /* v unix ipc (VSOCK) */ 127 struct { 128 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 129 SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */ 130 } vu_spec; 131 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 132 } v_un; 133 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 134 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 135 LIST_ENTRY(vnode) v_synclist; /* S dirty vnode list */ 136 enum vtype v_type; /* u vnode type */ 137 const char *v_tag; /* u type of underlying data */ 138 void *v_data; /* u private data for fs */ 139 struct lock v_lock; /* u used if fs don't have one */ 140 struct lock *v_vnlock; /* u pointer to vnode lock */ 141 vop_t **v_op; /* u vnode operations vector */ 142 struct mount *v_mount; /* u ptr to vfs we are in */ 143 LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ 144 TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ 145 u_long v_id; /* c capability identifier */ 146 struct vnode *v_dd; /* c .. vnode */ 147 u_long v_ddid; /* c .. capability identifier */ 148 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 149 struct label *v_label; /* MAC label for vnode */ 150#ifdef DEBUG_LOCKS 151 const char *filename; /* Source file doing locking */ 152 int line; /* Line number doing locking */ 153#endif 154 dev_t v_cachedfs; /* cached fs id */ 155 ino_t v_cachedid; /* cached file id */ 156 int v_bsize; /* block size for I/O */ 157}; 158 159#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 160 161#define v_mountedhere v_un.vu_mountedhere 162#define v_socket v_un.vu_socket 163#define v_rdev v_un.vu_spec.vu_cdev 164#define v_specnext v_un.vu_spec.vu_specnext 165#define v_fifoinfo v_un.vu_fifoinfo 166 167/* XXX: These are temporary to avoid a source sweep at this time */ 168#define v_cleanblkhd v_bufobj.bo_clean.bv_hd 169#define v_cleanblkroot v_bufobj.bo_clean.bv_root 170#define v_cleanbufcnt v_bufobj.bo_clean.bv_cnt 171#define v_dirtyblkhd v_bufobj.bo_dirty.bv_hd 172#define v_dirtyblkroot v_bufobj.bo_dirty.bv_root 173#define v_dirtybufcnt v_bufobj.bo_dirty.bv_cnt 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_BWAIT 0x0004 /* waiting for output to complete */ 228#define VI_OLOCK 0x0008 /* vnode is locked waiting for an object */ 229#define VI_OWANT 0x0010 /* a thread is waiting for VOLOCK */ 230#define VI_MOUNT 0x0020 /* Mount in progress */ 231#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 232#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 233#define VI_FREE 0x0100 /* This vnode is on the freelist */ 234#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 235#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 236/* 237 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 238 * in v_synclist. 239 */ 240#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 241 242#define VV_ROOT 0x0001 /* root of its filesystem */ 243#define VV_ISTTY 0x0002 /* vnode represents a tty */ 244#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 245#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 246#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 247#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 248#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 249#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 250#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 251 252/* 253 * Vnode attributes. A field value of VNOVAL represents a field whose value 254 * is unavailable (getattr) or which is not to be changed (setattr). 255 */ 256struct vattr { 257 enum vtype va_type; /* vnode type (for create) */ 258 u_short va_mode; /* files access mode and type */ 259 short va_nlink; /* number of references to file */ 260 uid_t va_uid; /* owner user id */ 261 gid_t va_gid; /* owner group id */ 262 dev_t va_fsid; /* filesystem id */ 263 long va_fileid; /* file id */ 264 u_quad_t va_size; /* file size in bytes */ 265 long va_blocksize; /* blocksize preferred for i/o */ 266 struct timespec va_atime; /* time of last access */ 267 struct timespec va_mtime; /* time of last modification */ 268 struct timespec va_ctime; /* time file changed */ 269 struct timespec va_birthtime; /* time file created */ 270 u_long va_gen; /* generation number of file */ 271 u_long va_flags; /* flags defined for file */ 272 dev_t va_rdev; /* device the special file represents */ 273 u_quad_t va_bytes; /* bytes of disk space held by file */ 274 u_quad_t va_filerev; /* file modification number */ 275 u_int va_vaflags; /* operations flags, see below */ 276 long va_spare; /* remain quad aligned */ 277}; 278 279/* 280 * Flags for va_vaflags. 281 */ 282#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 283#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 284 285/* 286 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 287 * help with write clustering) 288 */ 289#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 290#define IO_APPEND 0x0002 /* append write to end */ 291#define IO_SYNC 0x0004 /* do I/O synchronously */ 292#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 293#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 294#define IO_VMIO 0x0020 /* data already in VMIO space */ 295#define IO_INVAL 0x0040 /* invalidate after I/O */ 296#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 297#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 298#define IO_EXT 0x0400 /* operate on external attributes */ 299#define IO_NORMAL 0x0800 /* operate on regular data */ 300#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 301 302#define IO_SEQMAX 0x7F /* seq heuristic max value */ 303#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 304 305/* 306 * Modes. Some values same as Ixxx entries from inode.h for now. 307 */ 308#define VEXEC 000100 /* execute/search permission */ 309#define VWRITE 000200 /* write permission */ 310#define VREAD 000400 /* read permission */ 311#define VSVTX 001000 /* save swapped text even after use */ 312#define VSGID 002000 /* set group id on execution */ 313#define VSUID 004000 /* set user id on execution */ 314#define VADMIN 010000 /* permission to administer */ 315#define VSTAT 020000 /* permission to retrieve attrs */ 316#define VAPPEND 040000 /* permission to write/append */ 317#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 318 319/* 320 * Token indicating no attribute value yet assigned. 321 */ 322#define VNOVAL (-1) 323 324/* 325 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 326 */ 327#define VLKTIMEOUT (hz / 20 + 1) 328 329#ifdef _KERNEL 330 331#ifdef MALLOC_DECLARE 332MALLOC_DECLARE(M_VNODE); 333#endif 334 335/* 336 * Convert between vnode types and inode formats (since POSIX.1 337 * defines mode word of stat structure in terms of inode formats). 338 */ 339extern enum vtype iftovt_tab[]; 340extern int vttoif_tab[]; 341#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 342#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 343#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 344 345/* 346 * Flags to various vnode functions. 347 */ 348#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 349#define FORCECLOSE 0x0002 /* vflush: force file closure */ 350#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 351#define DOCLOSE 0x0008 /* vclean: close active files */ 352#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 353#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 354#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 355#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 356#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 357#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 358#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 359 360#define VREF(vp) vref(vp) 361 362#ifdef DIAGNOSTIC 363#define VATTR_NULL(vap) vattr_null(vap) 364#else 365#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 366#endif /* DIAGNOSTIC */ 367 368#define NULLVP ((struct vnode *)NULL) 369 370#define VNODEOP_SET(f) \ 371 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 372 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 373 374/* 375 * Global vnode data. 376 */ 377extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 378extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 379extern int desiredvnodes; /* number of vnodes desired */ 380extern struct uma_zone *namei_zone; 381extern int prtactive; /* nonzero to call vprint() */ 382extern struct vattr va_null; /* predefined null vattr structure */ 383 384/* 385 * Macro/function to check for client cache inconsistency w.r.t. leasing. 386 */ 387#define LEASE_READ 0x1 /* Check lease for readers */ 388#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 389 390extern void (*lease_updatetime)(int deltat); 391 392/* Requires interlock. */ 393#define VSHOULDFREE(vp) \ 394 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \ 395 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 396 (!(vp)->v_object || \ 397 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 398 399/* Requires interlock. */ 400#define VMIGHTFREE(vp) \ 401 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \ 402 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 403 404/* Requires interlock. */ 405#define VSHOULDBUSY(vp) \ 406 (((vp)->v_iflag & VI_FREE) && \ 407 ((vp)->v_holdcnt || (vp)->v_usecount)) 408 409#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 410#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 411#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 412#define VI_MTX(vp) (&(vp)->v_interlock) 413 414#endif /* _KERNEL */ 415 416/* 417 * Mods for extensibility. 418 */ 419 420/* 421 * Flags for vdesc_flags: 422 */ 423#define VDESC_MAX_VPS 16 424/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 425#define VDESC_VP0_WILLRELE 0x0001 426#define VDESC_VP1_WILLRELE 0x0002 427#define VDESC_VP2_WILLRELE 0x0004 428#define VDESC_VP3_WILLRELE 0x0008 429#define VDESC_NOMAP_VPP 0x0100 430#define VDESC_VPP_WILLRELE 0x0200 431 432/* 433 * VDESC_NO_OFFSET is used to identify the end of the offset list 434 * and in places where no such field exists. 435 */ 436#define VDESC_NO_OFFSET -1 437 438/* 439 * This structure describes the vnode operation taking place. 440 */ 441struct vnodeop_desc { 442 int vdesc_offset; /* offset in vector,first for speed */ 443 char *vdesc_name; /* a readable name for debugging */ 444 int vdesc_flags; /* VDESC_* flags */ 445 446 /* 447 * These ops are used by bypass routines to map and locate arguments. 448 * Creds and procs are not needed in bypass routines, but sometimes 449 * they are useful to (for example) transport layers. 450 * Nameidata is useful because it has a cred in it. 451 */ 452 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 453 int vdesc_vpp_offset; /* return vpp location */ 454 int vdesc_cred_offset; /* cred location, if any */ 455 int vdesc_thread_offset; /* thread location, if any */ 456 int vdesc_componentname_offset; /* if any */ 457 /* 458 * Finally, we've got a list of private data (about each operation) 459 * for each transport layer. (Support to manage this list is not 460 * yet part of BSD.) 461 */ 462 caddr_t *vdesc_transports; 463}; 464 465#ifdef _KERNEL 466/* 467 * A list of all the operation descs. 468 */ 469extern struct vnodeop_desc *vnodeop_descs[]; 470 471#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 472#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 473 ((s_type)(((char*)(struct_p)) + (s_offset))) 474 475/* 476 * This structure is used to configure the new vnodeops vector. 477 */ 478struct vnodeopv_entry_desc { 479 struct vnodeop_desc *opve_op; /* which operation this is */ 480 vop_t *opve_impl; /* code implementing this operation */ 481}; 482struct vnodeopv_desc { 483 /* ptr to the ptr to the vector where op should go */ 484 vop_t ***opv_desc_vector_p; 485 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 486}; 487 488/* 489 * A generic structure. 490 * This can be used by bypass routines to identify generic arguments. 491 */ 492struct vop_generic_args { 493 struct vnodeop_desc *a_desc; 494 /* other random data follows, presumably */ 495}; 496 497#ifdef DEBUG_VFS_LOCKS 498/* 499 * Support code to aid in debugging VFS locking problems. Not totally 500 * reliable since if the thread sleeps between changing the lock 501 * state and checking it with the assert, some other thread could 502 * change the state. They are good enough for debugging a single 503 * filesystem using a single-threaded test. 504 */ 505void assert_vi_locked(struct vnode *vp, const char *str); 506void assert_vi_unlocked(struct vnode *vp, const char *str); 507#if 0 508void assert_vop_elocked(struct vnode *vp, const char *str); 509void assert_vop_elocked_other(struct vnode *vp, const char *str); 510#endif 511void assert_vop_locked(struct vnode *vp, const char *str); 512#if 0 513voi0 assert_vop_slocked(struct vnode *vp, const char *str); 514#endif 515void assert_vop_unlocked(struct vnode *vp, const char *str); 516 517/* These are called from within the actual VOPS. */ 518void vop_lock_pre(void *a); 519void vop_lock_post(void *a, int rc); 520void vop_lookup_post(void *a, int rc); 521void vop_lookup_pre(void *a); 522void vop_rename_pre(void *a); 523void vop_strategy_pre(void *a); 524void vop_unlock_post(void *a, int rc); 525void vop_unlock_pre(void *a); 526 527#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 528#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 529#if 0 530#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 531#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 532#endif 533#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 534#if 0 535#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 536#endif 537#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 538 539#else /* !DEBUG_VFS_LOCKS */ 540 541#define ASSERT_VI_LOCKED(vp, str) 542#define ASSERT_VI_UNLOCKED(vp, str) 543#if 0 544#define ASSERT_VOP_ELOCKED(vp, str) 545#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 546#endif 547#define ASSERT_VOP_LOCKED(vp, str) 548#if 0 549#define ASSERT_VOP_SLOCKED(vp, str) 550#endif 551#define ASSERT_VOP_UNLOCKED(vp, str) 552#endif /* DEBUG_VFS_LOCKS */ 553 554/* 555 * VOCALL calls an op given an ops vector. We break it out because BSD's 556 * vclean changes the ops vector and then wants to call ops with the old 557 * vector. 558 */ 559#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 560 561/* 562 * This call works for vnodes in the kernel. 563 */ 564#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 565#define VDESC(OP) (& __CONCAT(OP,_desc)) 566#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 567 568/* 569 * VMIO support inline 570 */ 571 572extern int vmiodirenable; 573 574static __inline int 575vn_canvmio(struct vnode *vp) 576{ 577 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 578 return(TRUE); 579 return(FALSE); 580} 581 582/* 583 * Finally, include the default set of vnode operations. 584 */ 585#include "vnode_if.h" 586 587/* 588 * Public vnode manipulation functions. 589 */ 590struct componentname; 591struct file; 592struct mount; 593struct nameidata; 594struct ostat; 595struct thread; 596struct proc; 597struct stat; 598struct nstat; 599struct ucred; 600struct uio; 601struct vattr; 602struct vnode; 603 604extern int (*lease_check_hook)(struct vop_lease_args *); 605extern int (*softdep_fsync_hook)(struct vnode *); 606extern int (*softdep_process_worklist_hook)(struct mount *); 607 608struct vnode *addaliasu(struct vnode *vp, dev_t nvp_rdev); 609int bdevvp(struct cdev *dev, struct vnode **vpp); 610/* cache_* may belong in namei.h. */ 611void cache_enter(struct vnode *dvp, struct vnode *vp, 612 struct componentname *cnp); 613int cache_lookup(struct vnode *dvp, struct vnode **vpp, 614 struct componentname *cnp); 615void cache_purge(struct vnode *vp); 616void cache_purgevfs(struct mount *mp); 617int cache_leaf_test(struct vnode *vp); 618int change_dir(struct vnode *vp, struct thread *td); 619int change_root(struct vnode *vp, struct thread *td); 620void cvtstat(struct stat *st, struct ostat *ost); 621void cvtnstat(struct stat *sb, struct nstat *nsb); 622int getnewvnode(const char *tag, struct mount *mp, vop_t **vops, 623 struct vnode **vpp); 624u_quad_t init_va_filerev(void); 625int lease_check(struct vop_lease_args *ap); 626int spec_vnoperate(struct vop_generic_args *); 627int speedup_syncer(void); 628#define textvp_fullpath(p, rb, rfb) \ 629 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 630int vn_fullpath(struct thread *td, struct vnode *vn, 631 char **retbuf, char **freebuf); 632int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 633 mode_t acc_mode, struct ucred *cred, int *privused); 634int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 635 gid_t file_gid, struct acl *acl, mode_t acc_mode, 636 struct ucred *cred, int *privused); 637void vattr_null(struct vattr *vap); 638int vcount(struct vnode *vp); 639void vdrop(struct vnode *); 640void vdropl(struct vnode *); 641int vfinddev(struct cdev *dev, struct vnode **vpp); 642void vfs_add_vnodeops(const void *); 643void vfs_rm_vnodeops(const void *); 644int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 645int vget(struct vnode *vp, int lockflag, struct thread *td); 646void vgone(struct vnode *vp); 647void vgonel(struct vnode *vp, struct thread *td); 648void vhold(struct vnode *); 649void vholdl(struct vnode *); 650int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 651 struct thread *td, int slpflag, int slptimeo); 652int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 653 off_t length, int blksize); 654void vprint(char *label, struct vnode *vp); 655int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 656 struct thread *td); 657int vn_close(struct vnode *vp, 658 int flags, struct ucred *file_cred, struct thread *td); 659void vn_finished_write(struct mount *mp); 660int vn_isdisk(struct vnode *vp, int *errp); 661int vn_lock(struct vnode *vp, int flags, struct thread *td); 662#ifdef DEBUG_LOCKS 663int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 664 const char *filename, int line); 665#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 666#endif 667int vn_open(struct nameidata *ndp, int *flagp, int cmode, int fdidx); 668int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 669 struct ucred *cred, int fdidx); 670void vn_pollevent(struct vnode *vp, int events); 671void vn_pollgone(struct vnode *vp); 672int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 673int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 674 int len, off_t offset, enum uio_seg segflg, int ioflg, 675 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 676 struct thread *td); 677int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 678 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 679 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 680 struct thread *td); 681int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 682 struct ucred *file_cred, struct thread *td); 683int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 684struct cdev *vn_todev(struct vnode *vp); 685int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 686 int flags); 687int vn_writechk(struct vnode *vp); 688int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 689 const char *attrname, int *buflen, char *buf, struct thread *td); 690int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 691 const char *attrname, int buflen, char *buf, struct thread *td); 692int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 693 const char *attrname, struct thread *td); 694int vfs_cache_lookup(struct vop_lookup_args *ap); 695int vfs_object_create(struct vnode *vp, struct thread *td, 696 struct ucred *cred); 697void vfs_timestamp(struct timespec *); 698void vfs_write_resume(struct mount *mp); 699int vfs_write_suspend(struct mount *mp); 700int vop_stdbmap(struct vop_bmap_args *); 701int vop_stdfsync(struct vop_fsync_args *); 702int vop_stdgetwritemount(struct vop_getwritemount_args *); 703int vop_stdgetpages(struct vop_getpages_args *); 704int vop_stdinactive(struct vop_inactive_args *); 705int vop_stdislocked(struct vop_islocked_args *); 706int vop_stdlock(struct vop_lock_args *); 707int vop_stdputpages(struct vop_putpages_args *); 708int vop_stdunlock(struct vop_unlock_args *); 709int vop_nopoll(struct vop_poll_args *); 710int vop_stdpathconf(struct vop_pathconf_args *); 711int vop_stdpoll(struct vop_poll_args *); 712int vop_revoke(struct vop_revoke_args *); 713int vop_eopnotsupp(struct vop_generic_args *ap); 714int vop_ebadf(struct vop_generic_args *ap); 715int vop_einval(struct vop_generic_args *ap); 716int vop_enotty(struct vop_generic_args *ap); 717int vop_defaultop(struct vop_generic_args *ap); 718int vop_null(struct vop_generic_args *ap); 719int vop_panic(struct vop_generic_args *ap); 720int vop_stdcreatevobject(struct vop_createvobject_args *ap); 721int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 722int vop_stdgetvobject(struct vop_getvobject_args *ap); 723 724void vfree(struct vnode *); 725void vput(struct vnode *vp); 726void vrele(struct vnode *vp); 727void vref(struct vnode *vp); 728int vrefcnt(struct vnode *vp); 729void vbusy(struct vnode *vp); 730void v_addpollinfo(struct vnode *vp); 731 732extern vop_t **default_vnodeop_p; 733extern vop_t **spec_vnodeop_p; 734extern vop_t **dead_vnodeop_p; 735 736#endif /* _KERNEL */ 737 738#endif /* !_SYS_VNODE_H_ */ 739