vnode.h revision 101711
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94 34 * $FreeBSD: head/sys/sys/vnode.h 101711 2002-08-12 01:54:10Z rwatson $ 35 */ 36 37#ifndef _SYS_VNODE_H_ 38#define _SYS_VNODE_H_ 39 40/* 41 * XXX - compatability until lockmgr() goes away or all the #includes are 42 * updated. 43 */ 44#include <sys/lockmgr.h> 45 46#include <sys/queue.h> 47#include <sys/_lock.h> 48#include <sys/_mutex.h> 49#include <sys/selinfo.h> 50#include <sys/uio.h> 51#include <sys/acl.h> 52#include <sys/mac.h> 53#include <vm/uma.h> 54 55/* 56 * The vnode is the focus of all file activity in UNIX. There is a 57 * unique vnode allocated for each active file, each current directory, 58 * each mounted-on file, text file, and the root. 59 */ 60 61/* 62 * Vnode types. VNON means no type. 63 */ 64enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; 65 66/* 67 * Vnode tag types. 68 * These are for the benefit of external programs only (e.g., pstat) 69 * and should NEVER be inspected by the kernel. 70 */ 71enum vtagtype { 72 VT_NON, VT_UFS, VT_NFS, VT_UNUSED, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, 73 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, 74 VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, 75 VT_HPFS, VT_NWFS, VT_PSEUDOFS, VT_SMBFS, VT_UDF 76}; 77 78/* 79 * Each underlying filesystem allocates its own private area and hangs 80 * it from v_data. If non-null, this area is freed in getnewvnode(). 81 */ 82TAILQ_HEAD(buflists, buf); 83 84typedef int vop_t(void *); 85struct namecache; 86 87struct vpollinfo { 88 struct mtx vpi_lock; /* lock to protect below */ 89 struct selinfo vpi_selinfo; /* identity of poller(s) */ 90 short vpi_events; /* what they are looking for */ 91 short vpi_revents; /* what has happened */ 92}; 93 94/* 95 * Reading or writing any of these items requires holding the appropriate lock. 96 * 97 * Lock reference: 98 * f - freelist mutex 99 * i - interlock 100 * m - mntvnodes mutex 101 * p - pollinfo lock 102 * v - vnode lock 103 * 104 * XXX Not all fields are locked yet and some fields that are marked are not 105 * locked consistently. This is a work in progress. 106 */ 107 108struct vnode { 109 struct mtx v_interlock; /* lock for "i" things */ 110 u_long v_iflag; /* i vnode flags (see below) */ 111 int v_usecount; /* i ref count of users */ 112 int v_writecount; /* i ref count of writers */ 113 long v_numoutput; /* i writes in progress */ 114 struct thread *v_vxproc; /* i thread owning VXLOCK */ 115 int v_holdcnt; /* i page & buffer references */ 116 u_long v_vflag; /* v vnode flags */ 117 u_long v_id; /* capability identifier */ 118 struct mount *v_mount; /* ptr to vfs we are in */ 119 vop_t **v_op; /* vnode operations vector */ 120 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 121 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 122 struct buflists v_cleanblkhd; /* SORTED clean blocklist */ 123 struct buf *v_cleanblkroot; /* clean buf splay tree root */ 124 struct buflists v_dirtyblkhd; /* SORTED dirty blocklist */ 125 struct buf *v_dirtyblkroot; /* dirty buf splay tree root */ 126 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ 127 enum vtype v_type; /* vnode type */ 128 union { 129 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ 130 struct socket *vu_socket; /* unix ipc (VSOCK) */ 131 struct { 132 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ 133 SLIST_ENTRY(vnode) vu_specnext; 134 } vu_spec; 135 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ 136 } v_un; 137 daddr_t v_lastw; /* last write (write cluster) */ 138 daddr_t v_cstart; /* start block of cluster */ 139 daddr_t v_lasta; /* last allocation (cluster) */ 140 int v_clen; /* length of current cluster */ 141 struct vm_object *v_object; /* Place to store VM object */ 142 struct lock v_lock; /* used if fs don't have one */ 143 struct lock *v_vnlock; /* pointer to vnode lock */ 144 enum vtagtype v_tag; /* type of underlying data */ 145 void *v_data; /* private data for fs */ 146 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ 147 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ 148 struct vnode *v_dd; /* .. vnode */ 149 u_long v_ddid; /* .. 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 udev_t v_cachedfs; /* cached fs id */ 157 ino_t v_cachedid; /* cached file id */ 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_specinfo 162#define v_specnext v_un.vu_spec.vu_specnext 163#define v_fifoinfo v_un.vu_fifoinfo 164 165/* 166 * Userland version of struct vnode, for sysctl. 167 */ 168struct xvnode { 169 size_t xv_size; /* sizeof(struct xvnode) */ 170 void *xv_vnode; /* address of real vnode */ 171 u_long xv_flag; /* vnode vflags */ 172 int xv_usecount; /* reference count of users */ 173 int xv_writecount; /* reference count of writers */ 174 int xv_holdcnt; /* page & buffer references */ 175 u_long xv_id; /* capability identifier */ 176 void *xv_mount; /* address of parent mount */ 177 long xv_numoutput; /* num of writes in progress */ 178 enum vtype xv_type; /* vnode type */ 179 union { 180 void *xvu_socket; /* socket, if VSOCK */ 181 void *xvu_fifo; /* fifo, if VFIFO */ 182 udev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 183 struct { 184 udev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 185 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 186 }; 187 } xv_un; 188}; 189#define xv_socket xv_un.xvu_socket 190#define xv_fifo xv_un.xvu_fifo 191#define xv_rdev xv_un.xvu_rdev 192#define xv_dev xv_un.xvu_dev 193#define xv_ino xv_un.xvu_ino 194 195#define VN_POLLEVENT(vp, events) \ 196 do { \ 197 if ((vp)->v_pollinfo != NULL && \ 198 (vp)->v_pollinfo->vpi_events & (events)) \ 199 vn_pollevent((vp), (events)); \ 200 } while (0) 201 202#define VN_KNOTE(vp, b) \ 203 do { \ 204 if ((vp)->v_pollinfo != NULL) \ 205 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \ 206 } while (0) 207 208/* 209 * Vnode flags. 210 * VI flags are protected by interlock and live in v_iflag 211 * VV flags are protected by the vnode lock and live in v_vflag 212 */ 213#define VI_XLOCK 0x0001 /* vnode is locked to change vtype */ 214#define VI_XWANT 0x0002 /* thread is waiting for vnode */ 215#define VI_BWAIT 0x0004 /* waiting for output to complete */ 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/* 224 * XXX VI_ONWORKLST could be replaced with a check for NULL list elements 225 * in v_synclist. 226 */ 227#define VI_ONWORKLST 0x0200 /* On syncer work-list */ 228 229#define VV_ROOT 0x0001 /* root of its filesystem */ 230#define VV_ISTTY 0x0002 /* vnode represents a tty */ 231#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 232#define VV_OBJBUF 0x0008 /* Allocate buffers in VM object */ 233#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 234#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 235#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 236#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 237 238/* 239 * Vnode attributes. A field value of VNOVAL represents a field whose value 240 * is unavailable (getattr) or which is not to be changed (setattr). 241 */ 242struct vattr { 243 enum vtype va_type; /* vnode type (for create) */ 244 u_short va_mode; /* files access mode and type */ 245 short va_nlink; /* number of references to file */ 246 uid_t va_uid; /* owner user id */ 247 gid_t va_gid; /* owner group id */ 248 udev_t va_fsid; /* filesystem id */ 249 long va_fileid; /* file id */ 250 u_quad_t va_size; /* file size in bytes */ 251 long va_blocksize; /* blocksize preferred for i/o */ 252 struct timespec va_atime; /* time of last access */ 253 struct timespec va_mtime; /* time of last modification */ 254 struct timespec va_ctime; /* time file changed */ 255 struct timespec va_birthtime; /* time file created */ 256 u_long va_gen; /* generation number of file */ 257 u_long va_flags; /* flags defined for file */ 258 udev_t va_rdev; /* device the special file represents */ 259 u_quad_t va_bytes; /* bytes of disk space held by file */ 260 u_quad_t va_filerev; /* file modification number */ 261 u_int va_vaflags; /* operations flags, see below */ 262 long va_spare; /* remain quad aligned */ 263}; 264 265/* 266 * Flags for va_vaflags. 267 */ 268#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 269#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 270 271/* 272 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 273 * help with write clustering) 274 */ 275#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 276#define IO_APPEND 0x0002 /* append write to end */ 277#define IO_SYNC 0x0004 /* do I/O synchronously */ 278#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 279#define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ 280#define IO_VMIO 0x0020 /* data already in VMIO space */ 281#define IO_INVAL 0x0040 /* invalidate after I/O */ 282#define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ 283#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 284#define IO_NOWDRAIN 0x0200 /* do not block on wdrain */ 285#define IO_EXT 0x0400 /* operate on external attributes */ 286#define IO_NORMAL 0x0800 /* operate on regular data */ 287#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 288 289/* 290 * Modes. Some values same as Ixxx entries from inode.h for now. 291 */ 292#define VEXEC 000100 /* execute/search permission */ 293#define VWRITE 000200 /* write permission */ 294#define VREAD 000400 /* read permission */ 295#define VSVTX 001000 /* save swapped text even after use */ 296#define VSGID 002000 /* set group id on execution */ 297#define VSUID 004000 /* set user id on execution */ 298#define VADMIN 010000 /* permission to administer */ 299#define VSTAT 020000 /* permission to retrieve attrs */ 300#define VAPPEND 040000 /* permission to write/append */ 301#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 302 303/* 304 * Token indicating no attribute value yet assigned. 305 */ 306#define VNOVAL (-1) 307 308/* 309 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 310 */ 311#define VLKTIMEOUT (hz / 20 + 1) 312 313#ifdef _KERNEL 314 315#ifdef MALLOC_DECLARE 316MALLOC_DECLARE(M_VNODE); 317#endif 318 319/* 320 * Convert between vnode types and inode formats (since POSIX.1 321 * defines mode word of stat structure in terms of inode formats). 322 */ 323extern enum vtype iftovt_tab[]; 324extern int vttoif_tab[]; 325#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 326#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 327#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 328 329/* 330 * Flags to various vnode functions. 331 */ 332#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 333#define FORCECLOSE 0x0002 /* vflush: force file closure */ 334#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 335#define DOCLOSE 0x0008 /* vclean: close active files */ 336#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 337#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 338#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 339#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 340#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 341#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 342#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 343 344#define VREF(vp) vref(vp) 345 346 347#ifdef DIAGNOSTIC 348#define VATTR_NULL(vap) vattr_null(vap) 349#else 350#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 351#endif /* DIAGNOSTIC */ 352 353#define NULLVP ((struct vnode *)NULL) 354 355#define VNODEOP_SET(f) \ 356 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \ 357 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f); 358 359/* 360 * Global vnode data. 361 */ 362extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 363extern int desiredvnodes; /* number of vnodes desired */ 364extern uma_zone_t namei_zone; 365extern int prtactive; /* nonzero to call vprint() */ 366extern struct vattr va_null; /* predefined null vattr structure */ 367extern int vfs_ioopt; 368 369/* 370 * Macro/function to check for client cache inconsistency w.r.t. leasing. 371 */ 372#define LEASE_READ 0x1 /* Check lease for readers */ 373#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 374 375 376extern void (*lease_updatetime)(int deltat); 377 378/* Requires interlock */ 379#define VSHOULDFREE(vp) \ 380 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED)) && \ 381 !(vp)->v_holdcnt && !(vp)->v_usecount && \ 382 (!(vp)->v_object || \ 383 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count))) 384 385/* Requires interlock */ 386#define VMIGHTFREE(vp) \ 387 (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK)) && \ 388 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount) 389 390/* Requires interlock */ 391#define VSHOULDBUSY(vp) \ 392 (((vp)->v_iflag & VI_FREE) && \ 393 ((vp)->v_holdcnt || (vp)->v_usecount)) 394 395#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 396#define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) 397#define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) 398#define VI_MTX(vp) (&(vp)->v_interlock) 399 400#endif /* _KERNEL */ 401 402 403/* 404 * Mods for extensibility. 405 */ 406 407/* 408 * Flags for vdesc_flags: 409 */ 410#define VDESC_MAX_VPS 16 411/* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ 412#define VDESC_VP0_WILLRELE 0x0001 413#define VDESC_VP1_WILLRELE 0x0002 414#define VDESC_VP2_WILLRELE 0x0004 415#define VDESC_VP3_WILLRELE 0x0008 416#define VDESC_NOMAP_VPP 0x0100 417#define VDESC_VPP_WILLRELE 0x0200 418 419/* 420 * VDESC_NO_OFFSET is used to identify the end of the offset list 421 * and in places where no such field exists. 422 */ 423#define VDESC_NO_OFFSET -1 424 425/* 426 * This structure describes the vnode operation taking place. 427 */ 428struct vnodeop_desc { 429 int vdesc_offset; /* offset in vector,first for speed */ 430 char *vdesc_name; /* a readable name for debugging */ 431 int vdesc_flags; /* VDESC_* flags */ 432 433 /* 434 * These ops are used by bypass routines to map and locate arguments. 435 * Creds and procs are not needed in bypass routines, but sometimes 436 * they are useful to (for example) transport layers. 437 * Nameidata is useful because it has a cred in it. 438 */ 439 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ 440 int vdesc_vpp_offset; /* return vpp location */ 441 int vdesc_cred_offset; /* cred location, if any */ 442 int vdesc_thread_offset; /* thread location, if any */ 443 int vdesc_componentname_offset; /* if any */ 444 /* 445 * Finally, we've got a list of private data (about each operation) 446 * for each transport layer. (Support to manage this list is not 447 * yet part of BSD.) 448 */ 449 caddr_t *vdesc_transports; 450}; 451 452#ifdef _KERNEL 453/* 454 * A list of all the operation descs. 455 */ 456extern struct vnodeop_desc *vnodeop_descs[]; 457 458/* 459 * Interlock for scanning list of vnodes attached to a mountpoint 460 */ 461extern struct mtx mntvnode_mtx; 462 463/* 464 * This macro is very helpful in defining those offsets in the vdesc struct. 465 * 466 * This is stolen from X11R4. I ignored all the fancy stuff for 467 * Crays, so if you decide to port this to such a serious machine, 468 * you might want to consult Intrinsic.h's XtOffset{,Of,To}. 469 */ 470#define VOPARG_OFFSET(p_type,field) \ 471 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) 472#define VOPARG_OFFSETOF(s_type,field) \ 473 VOPARG_OFFSET(s_type*,field) 474#define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ 475 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) 476 477 478/* 479 * This structure is used to configure the new vnodeops vector. 480 */ 481struct vnodeopv_entry_desc { 482 struct vnodeop_desc *opve_op; /* which operation this is */ 483 vop_t *opve_impl; /* code implementing this operation */ 484}; 485struct vnodeopv_desc { 486 /* ptr to the ptr to the vector where op should go */ 487 vop_t ***opv_desc_vector_p; 488 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ 489}; 490 491/* 492 * A generic structure. 493 * This can be used by bypass routines to identify generic arguments. 494 */ 495struct vop_generic_args { 496 struct vnodeop_desc *a_desc; 497 /* other random data follows, presumably */ 498}; 499 500 501#ifdef DEBUG_VFS_LOCKS 502/* 503 * Macros to aid in tracing VFS locking problems. Not totally 504 * reliable since if the thread sleeps between changing the lock 505 * state and checking it with the assert, some other thread could 506 * change the state. They are good enough for debugging a single 507 * filesystem using a single-threaded test. I find that 'cvs co src' 508 * is a pretty good test. 509 */ 510 511extern int vfs_badlock_panic; 512extern int vfs_badlock_print; 513 514/* 515 * This only exists to supress warnings from unlocked specfs accesses. It is 516 * no longer ok to have an unlocked VFS. 517 */ 518 519#define IGNORE_LOCK(vp) ((vp)->v_type == VCHR || (vp)->v_type == VBAD) 520 521#define ASSERT_VOP_LOCKED(vp, str) \ 522do { \ 523 struct vnode *_vp = (vp); \ 524 \ 525 if (_vp && !IGNORE_LOCK(_vp) && !VOP_ISLOCKED(_vp, NULL)) { \ 526 if (vfs_badlock_print) \ 527 printf("%s: %p is not locked but should be\n", \ 528 str, _vp); \ 529 if (vfs_badlock_panic) \ 530 Debugger("Lock violation.\n"); \ 531 } \ 532} while (0) 533 534#define ASSERT_VOP_UNLOCKED(vp, str) \ 535do { \ 536 struct vnode *_vp = (vp); \ 537 int lockstate; \ 538 \ 539 if (_vp && !IGNORE_LOCK(_vp)) { \ 540 lockstate = VOP_ISLOCKED(_vp, curthread); \ 541 if (lockstate == LK_EXCLUSIVE) { \ 542 if (vfs_badlock_print) \ 543 printf("%s: %p is locked but should not be\n", \ 544 str, _vp); \ 545 if (vfs_badlock_panic) \ 546 Debugger("Lock Violation.\n"); \ 547 } \ 548 } \ 549} while (0) 550 551#define ASSERT_VOP_ELOCKED(vp, str) \ 552do { \ 553 struct vnode *_vp = (vp); \ 554 \ 555 if (_vp && !IGNORE_LOCK(_vp) && \ 556 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) { \ 557 if (vfs_badlock_print) \ 558 printf("%s: %p is not exclusive locked but should be\n",\ 559 str, _vp); \ 560 if (vfs_badlock_panic) \ 561 Debugger("Lock violation.\n"); \ 562 } \ 563} while (0) 564 565#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \ 566do { \ 567 struct vnode *_vp = (vp); \ 568 \ 569 if (_vp && !IGNORE_LOCK(_vp) && \ 570 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) { \ 571 if (vfs_badlock_print) \ 572 printf("%s: %p is not exclusive locked by another thread\n",\ 573 str, _vp); \ 574 if (vfs_badlock_panic) \ 575 Debugger("Lock violation.\n"); \ 576 } \ 577} while (0) 578 579#define ASSERT_VOP_SLOCKED(vp, str) \ 580do { \ 581 struct vnode *_vp = (vp); \ 582 \ 583 if (_vp && !IGNORE_LOCK(_vp) && \ 584 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) { \ 585 if (vfs_badlock_print) \ 586 printf("%s: %p is not locked shared but should be",\ 587 str, _vp); \ 588 if (vfs_badlock_panic) \ 589 Debugger("Lock violation.\n"); \ 590 } \ 591} while (0) 592 593void vop_rename_pre(void *a); 594void vop_strategy_pre(void *a); 595void vop_lookup_pre(void *a); 596void vop_lookup_post(void *a, int rc); 597 598#else 599 600#define ASSERT_VOP_LOCKED(vp, str) 601#define ASSERT_VOP_UNLOCKED(vp, str) 602 603#endif 604 605/* 606 * VOCALL calls an op given an ops vector. We break it out because BSD's 607 * vclean changes the ops vector and then wants to call ops with the old 608 * vector. 609 */ 610#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) 611 612/* 613 * This call works for vnodes in the kernel. 614 */ 615#define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) 616#define VDESC(OP) (& __CONCAT(OP,_desc)) 617#define VOFFSET(OP) (VDESC(OP)->vdesc_offset) 618 619/* 620 * VMIO support inline 621 */ 622 623extern int vmiodirenable; 624 625static __inline int 626vn_canvmio(struct vnode *vp) 627{ 628 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 629 return(TRUE); 630 return(FALSE); 631} 632 633/* 634 * Finally, include the default set of vnode operations. 635 */ 636#include "vnode_if.h" 637 638/* 639 * Public vnode manipulation functions. 640 */ 641struct componentname; 642struct file; 643struct mount; 644struct nameidata; 645struct ostat; 646struct thread; 647struct proc; 648struct stat; 649struct nstat; 650struct ucred; 651struct uio; 652struct vattr; 653struct vnode; 654 655extern int (*lease_check_hook)(struct vop_lease_args *); 656extern int (*softdep_fsync_hook)(struct vnode *); 657extern int (*softdep_process_worklist_hook)(struct mount *); 658 659struct vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev); 660int bdevvp(dev_t dev, struct vnode **vpp); 661/* cache_* may belong in namei.h. */ 662void cache_enter(struct vnode *dvp, struct vnode *vp, 663 struct componentname *cnp); 664int cache_lookup(struct vnode *dvp, struct vnode **vpp, 665 struct componentname *cnp); 666void cache_purge(struct vnode *vp); 667void cache_purgevfs(struct mount *mp); 668int cache_leaf_test(struct vnode *vp); 669void cvtstat(struct stat *st, struct ostat *ost); 670void cvtnstat(struct stat *sb, struct nstat *nsb); 671int getnewvnode(enum vtagtype tag, 672 struct mount *mp, vop_t **vops, struct vnode **vpp); 673int lease_check(struct vop_lease_args *ap); 674int spec_vnoperate(struct vop_generic_args *); 675int speedup_syncer(void); 676#define textvp_fullpath(p, rb, rfb) \ 677 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 678int vn_fullpath(struct thread *td, struct vnode *vn, 679 char **retbuf, char **freebuf); 680int vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, 681 mode_t acc_mode, struct ucred *cred, int *privused); 682int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 683 gid_t file_gid, struct acl *acl, mode_t acc_mode, 684 struct ucred *cred, int *privused); 685void vattr_null(struct vattr *vap); 686int vcount(struct vnode *vp); 687void vdrop(struct vnode *); 688int vfinddev(dev_t dev, enum vtype type, struct vnode **vpp); 689void vfs_add_vnodeops(const void *); 690void vfs_rm_vnodeops(const void *); 691int vflush(struct mount *mp, int rootrefs, int flags); 692int vget(struct vnode *vp, int lockflag, struct thread *td); 693void vgone(struct vnode *vp); 694void vgonel(struct vnode *vp, struct thread *td); 695void vhold(struct vnode *); 696int vinvalbuf(struct vnode *vp, int save, struct ucred *cred, 697 struct thread *td, int slpflag, int slptimeo); 698int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 699 off_t length, int blksize); 700void vprint(char *label, struct vnode *vp); 701int vrecycle(struct vnode *vp, struct mtx *inter_lkp, 702 struct thread *td); 703int vn_close(struct vnode *vp, 704 int flags, struct ucred *cred, struct thread *td); 705void vn_finished_write(struct mount *mp); 706int vn_isdisk(struct vnode *vp, int *errp); 707int vn_lock(struct vnode *vp, int flags, struct thread *td); 708#ifdef DEBUG_LOCKS 709int debug_vn_lock(struct vnode *vp, int flags, struct thread *p, 710 const char *filename, int line); 711#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__) 712#endif 713int vn_mkdir(char *path, int mode, enum uio_seg segflg, struct thread *td); 714int vn_open(struct nameidata *ndp, int *flagp, int cmode); 715int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 716 struct ucred *cred); 717void vn_pollevent(struct vnode *vp, int events); 718void vn_pollgone(struct vnode *vp); 719int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 720int vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, 721 int len, off_t offset, enum uio_seg segflg, int ioflg, 722 struct ucred *cred, int *aresid, struct thread *td); 723int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, 724 int len, off_t offset, enum uio_seg segflg, int ioflg, 725 struct ucred *cred, int *aresid, struct thread *td); 726int vn_stat(struct vnode *vp, struct stat *sb, struct thread *td); 727int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 728dev_t vn_todev(struct vnode *vp); 729int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 730 int flags); 731int vn_writechk(struct vnode *vp); 732int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 733 const char *attrname, int *buflen, char *buf, struct thread *td); 734int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 735 const char *attrname, int buflen, char *buf, struct thread *td); 736int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 737 const char *attrname, struct thread *td); 738int vfs_cache_lookup(struct vop_lookup_args *ap); 739int vfs_object_create(struct vnode *vp, struct thread *td, 740 struct ucred *cred); 741void vfs_timestamp(struct timespec *); 742void vfs_write_resume(struct mount *mp); 743void vfs_write_suspend(struct mount *mp); 744int vop_stdbmap(struct vop_bmap_args *); 745int vop_stdgetwritemount(struct vop_getwritemount_args *); 746int vop_stdgetpages(struct vop_getpages_args *); 747int vop_stdinactive(struct vop_inactive_args *); 748int vop_stdislocked(struct vop_islocked_args *); 749int vop_stdlock(struct vop_lock_args *); 750int vop_stdputpages(struct vop_putpages_args *); 751int vop_stdunlock(struct vop_unlock_args *); 752int vop_noislocked(struct vop_islocked_args *); 753int vop_nolock(struct vop_lock_args *); 754int vop_nopoll(struct vop_poll_args *); 755int vop_nounlock(struct vop_unlock_args *); 756int vop_stdpathconf(struct vop_pathconf_args *); 757int vop_stdpoll(struct vop_poll_args *); 758int vop_revoke(struct vop_revoke_args *); 759int vop_sharedlock(struct vop_lock_args *); 760int vop_eopnotsupp(struct vop_generic_args *ap); 761int vop_ebadf(struct vop_generic_args *ap); 762int vop_einval(struct vop_generic_args *ap); 763int vop_enotty(struct vop_generic_args *ap); 764int vop_defaultop(struct vop_generic_args *ap); 765int vop_null(struct vop_generic_args *ap); 766int vop_panic(struct vop_generic_args *ap); 767int vop_stdcreatevobject(struct vop_createvobject_args *ap); 768int vop_stddestroyvobject(struct vop_destroyvobject_args *ap); 769int vop_stdgetvobject(struct vop_getvobject_args *ap); 770 771void vfree(struct vnode *); 772void vput(struct vnode *vp); 773void vrele(struct vnode *vp); 774void vref(struct vnode *vp); 775void vbusy(struct vnode *vp); 776void v_addpollinfo(struct vnode *vp); 777 778extern vop_t **default_vnodeop_p; 779extern vop_t **spec_vnodeop_p; 780extern vop_t **dead_vnodeop_p; 781 782#endif /* _KERNEL */ 783 784#endif /* !_SYS_VNODE_H_ */ 785