vnode.h revision 175202
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 175202 2008-01-10 01:10:58Z attilio $ 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 VMARKER }; 64 65/* 66 * Each underlying filesystem allocates its own private area and hangs 67 * it from v_data. If non-null, this area is freed in getnewvnode(). 68 */ 69 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 DOOMED 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 /* 111 * Fields which define the identity of the vnode. These fields are 112 * owned by the filesystem (XXX: and vgone() ?) 113 */ 114 enum vtype v_type; /* u vnode type */ 115 const char *v_tag; /* u type of underlying data */ 116 struct vop_vector *v_op; /* u vnode operations vector */ 117 void *v_data; /* u private data for fs */ 118 119 /* 120 * Filesystem instance stuff 121 */ 122 struct mount *v_mount; /* u ptr to vfs we are in */ 123 TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ 124 125 /* 126 * Type specific fields, only one applies to any given vnode. 127 * See #defines below for renaming to v_* namespace. 128 */ 129 union { 130 struct mount *vu_mount; /* v ptr to mountpoint (VDIR) */ 131 struct socket *vu_socket; /* v unix domain net (VSOCK) */ 132 struct cdev *vu_cdev; /* v device (VCHR, VBLK) */ 133 struct fifoinfo *vu_fifoinfo; /* v fifo (VFIFO) */ 134 } v_un; 135 136 /* 137 * vfs_hash: (mount + inode) -> vnode hash. 138 */ 139 LIST_ENTRY(vnode) v_hashlist; 140 u_int v_hash; 141 142 /* 143 * VFS_namecache stuff 144 */ 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 struct vnode *v_dd; /* c .. vnode */ 148 149 /* 150 * clustering stuff 151 */ 152 daddr_t v_cstart; /* v start block of cluster */ 153 daddr_t v_lasta; /* v last allocation */ 154 daddr_t v_lastw; /* v last write */ 155 int v_clen; /* v length of cur. cluster */ 156 157 /* 158 * Locking 159 */ 160 struct lock v_lock; /* u (if fs don't have one) */ 161 struct mtx v_interlock; /* lock for "i" things */ 162 struct lock *v_vnlock; /* u pointer to vnode lock */ 163 int v_holdcnt; /* i prevents recycling. */ 164 int v_usecount; /* i ref count of users */ 165 u_long v_iflag; /* i vnode flags (see below) */ 166 u_long v_vflag; /* v vnode flags */ 167 int v_writecount; /* v ref count of writers */ 168 169 /* 170 * The machinery of being a vnode 171 */ 172 TAILQ_ENTRY(vnode) v_freelist; /* f vnode freelist */ 173 struct bufobj v_bufobj; /* * Buffer cache object */ 174 175 /* 176 * Hooks for various subsystems and features. 177 */ 178 struct vpollinfo *v_pollinfo; /* G Poll events, p for *v_pi */ 179 struct label *v_label; /* MAC label for vnode */ 180}; 181 182#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ 183 184#define v_mountedhere v_un.vu_mount 185#define v_socket v_un.vu_socket 186#define v_rdev v_un.vu_cdev 187#define v_fifoinfo v_un.vu_fifoinfo 188 189/* XXX: These are temporary to avoid a source sweep at this time */ 190#define v_object v_bufobj.bo_object 191 192/* 193 * Userland version of struct vnode, for sysctl. 194 */ 195struct xvnode { 196 size_t xv_size; /* sizeof(struct xvnode) */ 197 void *xv_vnode; /* address of real vnode */ 198 u_long xv_flag; /* vnode vflags */ 199 int xv_usecount; /* reference count of users */ 200 int xv_writecount; /* reference count of writers */ 201 int xv_holdcnt; /* page & buffer references */ 202 u_long xv_id; /* capability identifier */ 203 void *xv_mount; /* address of parent mount */ 204 long xv_numoutput; /* num of writes in progress */ 205 enum vtype xv_type; /* vnode type */ 206 union { 207 void *xvu_socket; /* socket, if VSOCK */ 208 void *xvu_fifo; /* fifo, if VFIFO */ 209 dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ 210 struct { 211 dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ 212 ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ 213 } xv_uns; 214 } xv_un; 215}; 216#define xv_socket xv_un.xvu_socket 217#define xv_fifo xv_un.xvu_fifo 218#define xv_rdev xv_un.xvu_rdev 219#define xv_dev xv_un.xv_uns.xvu_dev 220#define xv_ino xv_un.xv_uns.xvu_ino 221 222/* We don't need to lock the knlist */ 223#define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \ 224 KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note)) 225 226#define VN_KNOTE(vp, b, a) \ 227 do { \ 228 if (!VN_KNLIST_EMPTY(vp)) \ 229 KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), (a)); \ 230 } while (0) 231#define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, 1) 232#define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) 233 234/* 235 * Vnode flags. 236 * VI flags are protected by interlock and live in v_iflag 237 * VV flags are protected by the vnode lock and live in v_vflag 238 */ 239#define VI_MOUNT 0x0020 /* Mount in progress */ 240#define VI_AGE 0x0040 /* Insert vnode at head of free list */ 241#define VI_DOOMED 0x0080 /* This vnode is being recycled */ 242#define VI_FREE 0x0100 /* This vnode is on the freelist */ 243#define VI_OBJDIRTY 0x0400 /* object might be dirty */ 244#define VI_DOINGINACT 0x0800 /* VOP_INACTIVE is in progress */ 245#define VI_OWEINACT 0x1000 /* Need to call inactive */ 246 247#define VV_ROOT 0x0001 /* root of its filesystem */ 248#define VV_ISTTY 0x0002 /* vnode represents a tty */ 249#define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ 250#define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ 251#define VV_TEXT 0x0020 /* vnode is a pure text prototype */ 252#define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ 253#define VV_SYSTEM 0x0080 /* vnode being used by kernel */ 254#define VV_PROCDEP 0x0100 /* vnode is process dependent */ 255#define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */ 256#define VV_DELETED 0x0400 /* should be removed */ 257#define VV_MD 0x0800 /* vnode backs the md device */ 258 259/* 260 * Vnode attributes. A field value of VNOVAL represents a field whose value 261 * is unavailable (getattr) or which is not to be changed (setattr). 262 */ 263struct vattr { 264 enum vtype va_type; /* vnode type (for create) */ 265 u_short va_mode; /* files access mode and type */ 266 short va_nlink; /* number of references to file */ 267 uid_t va_uid; /* owner user id */ 268 gid_t va_gid; /* owner group id */ 269 dev_t va_fsid; /* filesystem id */ 270 long va_fileid; /* file id */ 271 u_quad_t va_size; /* file size in bytes */ 272 long va_blocksize; /* blocksize preferred for i/o */ 273 struct timespec va_atime; /* time of last access */ 274 struct timespec va_mtime; /* time of last modification */ 275 struct timespec va_ctime; /* time file changed */ 276 struct timespec va_birthtime; /* time file created */ 277 u_long va_gen; /* generation number of file */ 278 u_long va_flags; /* flags defined for file */ 279 dev_t va_rdev; /* device the special file represents */ 280 u_quad_t va_bytes; /* bytes of disk space held by file */ 281 u_quad_t va_filerev; /* file modification number */ 282 u_int va_vaflags; /* operations flags, see below */ 283 long va_spare; /* remain quad aligned */ 284}; 285 286/* 287 * Flags for va_vaflags. 288 */ 289#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ 290#define VA_EXCLUSIVE 0x02 /* exclusive create request */ 291#define VA_MARK_ATIME 0x04 /* setting atime for execve/mmap */ 292 293/* 294 * Flags for ioflag. (high 16 bits used to ask for read-ahead and 295 * help with write clustering) 296 * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h 297 */ 298#define IO_UNIT 0x0001 /* do I/O as atomic unit */ 299#define IO_APPEND 0x0002 /* append write to end */ 300#define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ 301#define IO_NODELOCKED 0x0008 /* underlying node already locked */ 302#define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ 303#define IO_VMIO 0x0020 /* data already in VMIO space */ 304#define IO_INVAL 0x0040 /* invalidate after I/O */ 305#define IO_SYNC 0x0080 /* do I/O synchronously */ 306#define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ 307#define IO_EXT 0x0400 /* operate on external attributes */ 308#define IO_NORMAL 0x0800 /* operate on regular data */ 309#define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ 310 311#define IO_SEQMAX 0x7F /* seq heuristic max value */ 312#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ 313 314/* 315 * Modes. Some values same as Ixxx entries from inode.h for now. 316 */ 317#define VEXEC 000100 /* execute/search permission */ 318#define VWRITE 000200 /* write permission */ 319#define VREAD 000400 /* read permission */ 320#define VSVTX 001000 /* save swapped text even after use */ 321#define VSGID 002000 /* set group id on execution */ 322#define VSUID 004000 /* set user id on execution */ 323#define VADMIN 010000 /* permission to administer */ 324#define VSTAT 020000 /* permission to retrieve attrs */ 325#define VAPPEND 040000 /* permission to write/append */ 326#define VALLPERM (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND) 327 328/* 329 * Token indicating no attribute value yet assigned. 330 */ 331#define VNOVAL (-1) 332 333/* 334 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) 335 */ 336#define VLKTIMEOUT (hz / 20 + 1) 337 338#ifdef _KERNEL 339 340#ifdef MALLOC_DECLARE 341MALLOC_DECLARE(M_VNODE); 342#endif 343 344/* 345 * Convert between vnode types and inode formats (since POSIX.1 346 * defines mode word of stat structure in terms of inode formats). 347 */ 348extern enum vtype iftovt_tab[]; 349extern int vttoif_tab[]; 350#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) 351#define VTTOIF(indx) (vttoif_tab[(int)(indx)]) 352#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) 353 354/* 355 * Flags to various vnode functions. 356 */ 357#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ 358#define FORCECLOSE 0x0002 /* vflush: force file closure */ 359#define WRITECLOSE 0x0004 /* vflush: only close writable files */ 360#define DOCLOSE 0x0008 /* vclean: close active files */ 361#define V_SAVE 0x0001 /* vinvalbuf: sync file first */ 362#define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ 363#define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ 364#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ 365#define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ 366#define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ 367#define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ 368 369#define VREF(vp) vref(vp) 370 371#ifdef DIAGNOSTIC 372#define VATTR_NULL(vap) vattr_null(vap) 373#else 374#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ 375#endif /* DIAGNOSTIC */ 376 377#define NULLVP ((struct vnode *)NULL) 378 379/* 380 * Global vnode data. 381 */ 382extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ 383extern int async_io_version; /* 0 or POSIX version of AIO i'face */ 384extern int desiredvnodes; /* number of vnodes desired */ 385extern struct uma_zone *namei_zone; 386extern int prtactive; /* nonzero to call vprint() */ 387extern struct vattr va_null; /* predefined null vattr structure */ 388 389/* 390 * Macro/function to check for client cache inconsistency w.r.t. leasing. 391 */ 392#define LEASE_READ 0x1 /* Check lease for readers */ 393#define LEASE_WRITE 0x2 /* Check lease for modifiers */ 394 395extern void (*lease_updatetime)(int deltat); 396 397#define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) 398#define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags)) 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 * A generic structure. 423 * This can be used by bypass routines to identify generic arguments. 424 */ 425struct vop_generic_args { 426 struct vnodeop_desc *a_desc; 427 /* other random data follows, presumably */ 428}; 429 430typedef int vop_bypass_t(struct vop_generic_args *); 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 char *vdesc_name; /* a readable name for debugging */ 443 int vdesc_flags; /* VDESC_* flags */ 444 vop_bypass_t *vdesc_call; /* Function to call */ 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}; 458 459#ifdef _KERNEL 460/* 461 * A list of all the operation descs. 462 */ 463extern struct vnodeop_desc *vnodeop_descs[]; 464 465#define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) 466#define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ 467 ((s_type)(((char*)(struct_p)) + (s_offset))) 468 469 470#ifdef DEBUG_VFS_LOCKS 471/* 472 * Support code to aid in debugging VFS locking problems. Not totally 473 * reliable since if the thread sleeps between changing the lock 474 * state and checking it with the assert, some other thread could 475 * change the state. They are good enough for debugging a single 476 * filesystem using a single-threaded test. 477 */ 478void assert_vi_locked(struct vnode *vp, const char *str); 479void assert_vi_unlocked(struct vnode *vp, const char *str); 480void assert_vop_elocked(struct vnode *vp, const char *str); 481#if 0 482void assert_vop_elocked_other(struct vnode *vp, const char *str); 483#endif 484void assert_vop_locked(struct vnode *vp, const char *str); 485#if 0 486voi0 assert_vop_slocked(struct vnode *vp, const char *str); 487#endif 488void assert_vop_unlocked(struct vnode *vp, const char *str); 489 490#define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) 491#define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) 492#define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) 493#if 0 494#define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str)) 495#endif 496#define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) 497#if 0 498#define ASSERT_VOP_SLOCKED(vp, str) assert_vop_slocked((vp), (str)) 499#endif 500#define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) 501 502#else /* !DEBUG_VFS_LOCKS */ 503 504#define ASSERT_VI_LOCKED(vp, str) 505#define ASSERT_VI_UNLOCKED(vp, str) 506#define ASSERT_VOP_ELOCKED(vp, str) 507#if 0 508#define ASSERT_VOP_ELOCKED_OTHER(vp, str) 509#endif 510#define ASSERT_VOP_LOCKED(vp, str) 511#if 0 512#define ASSERT_VOP_SLOCKED(vp, str) 513#endif 514#define ASSERT_VOP_UNLOCKED(vp, str) 515#endif /* DEBUG_VFS_LOCKS */ 516 517 518/* 519 * This call works for vnodes in the kernel. 520 */ 521#define VCALL(c) ((c)->a_desc->vdesc_call(c)) 522 523/* 524 * VMIO support inline 525 */ 526 527extern int vmiodirenable; 528 529static __inline int 530vn_canvmio(struct vnode *vp) 531{ 532 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) 533 return(TRUE); 534 return(FALSE); 535} 536 537/* 538 * Finally, include the default set of vnode operations. 539 */ 540#include "vnode_if.h" 541 542/* 543 * Public vnode manipulation functions. 544 */ 545struct componentname; 546struct file; 547struct mount; 548struct nameidata; 549struct ostat; 550struct thread; 551struct proc; 552struct stat; 553struct nstat; 554struct ucred; 555struct uio; 556struct vattr; 557struct vnode; 558 559extern int (*lease_check_hook)(struct vop_lease_args *); 560 561/* cache_* may belong in namei.h. */ 562void cache_enter(struct vnode *dvp, struct vnode *vp, 563 struct componentname *cnp); 564int cache_lookup(struct vnode *dvp, struct vnode **vpp, 565 struct componentname *cnp); 566void cache_purge(struct vnode *vp); 567void cache_purgevfs(struct mount *mp); 568int change_dir(struct vnode *vp, struct thread *td); 569int change_root(struct vnode *vp, struct thread *td); 570void cvtstat(struct stat *st, struct ostat *ost); 571void cvtnstat(struct stat *sb, struct nstat *nsb); 572int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, 573 struct vnode **vpp); 574int insmntque1(struct vnode *vp, struct mount *mp, 575 void (*dtr)(struct vnode *, void *), void *dtr_arg); 576int insmntque(struct vnode *vp, struct mount *mp); 577u_quad_t init_va_filerev(void); 578int lease_check(struct vop_lease_args *ap); 579int speedup_syncer(void); 580#define textvp_fullpath(p, rb, rfb) \ 581 vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb) 582int vn_fullpath(struct thread *td, struct vnode *vn, 583 char **retbuf, char **freebuf); 584int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid, 585 gid_t file_gid, mode_t acc_mode, struct ucred *cred, 586 int *privused); 587int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, 588 gid_t file_gid, struct acl *acl, mode_t acc_mode, 589 struct ucred *cred, int *privused); 590void vattr_null(struct vattr *vap); 591int vcount(struct vnode *vp); 592void vdrop(struct vnode *); 593void vdropl(struct vnode *); 594int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); 595int vget(struct vnode *vp, int lockflag, struct thread *td); 596void vgone(struct vnode *vp); 597void vhold(struct vnode *); 598void vholdl(struct vnode *); 599int vinvalbuf(struct vnode *vp, int save, 600 struct thread *td, int slpflag, int slptimeo); 601int vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td, 602 off_t length, int blksize); 603void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); 604#define vprint(label, vp) vn_printf((vp), "%s\n", (label)) 605int vrecycle(struct vnode *vp, struct thread *td); 606int vn_close(struct vnode *vp, 607 int flags, struct ucred *file_cred, struct thread *td); 608void vn_finished_write(struct mount *mp); 609void vn_finished_secondary_write(struct mount *mp); 610int vn_isdisk(struct vnode *vp, int *errp); 611int _vn_lock(struct vnode *vp, int flags, char *file, int line); 612#define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__) 613int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp); 614int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, 615 struct ucred *cred, struct file *fp); 616int vn_pollrecord(struct vnode *vp, struct thread *p, int events); 617int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, 618 int len, off_t offset, enum uio_seg segflg, int ioflg, 619 struct ucred *active_cred, struct ucred *file_cred, int *aresid, 620 struct thread *td); 621int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base, 622 size_t len, off_t offset, enum uio_seg segflg, int ioflg, 623 struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, 624 struct thread *td); 625int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, 626 struct ucred *file_cred, struct thread *td); 627int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); 628int vn_start_secondary_write(struct vnode *vp, struct mount **mpp, 629 int flags); 630int vn_write_suspend_wait(struct vnode *vp, struct mount *mp, 631 int flags); 632int vn_writechk(struct vnode *vp); 633int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, 634 const char *attrname, int *buflen, char *buf, struct thread *td); 635int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, 636 const char *attrname, int buflen, char *buf, struct thread *td); 637int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, 638 const char *attrname, struct thread *td); 639int vfs_cache_lookup(struct vop_lookup_args *ap); 640void vfs_timestamp(struct timespec *); 641void vfs_write_resume(struct mount *mp); 642int vfs_write_suspend(struct mount *mp); 643int vop_stdbmap(struct vop_bmap_args *); 644int vop_stdfsync(struct vop_fsync_args *); 645int vop_stdgetwritemount(struct vop_getwritemount_args *); 646int vop_stdgetpages(struct vop_getpages_args *); 647int vop_stdinactive(struct vop_inactive_args *); 648int vop_stdislocked(struct vop_islocked_args *); 649int vop_stdkqfilter(struct vop_kqfilter_args *); 650int vop_stdlock(struct vop_lock1_args *); 651int vop_stdputpages(struct vop_putpages_args *); 652int vop_stdunlock(struct vop_unlock_args *); 653int vop_nopoll(struct vop_poll_args *); 654int vop_stdpathconf(struct vop_pathconf_args *); 655int vop_stdpoll(struct vop_poll_args *); 656int vop_stdvptofh(struct vop_vptofh_args *ap); 657int vop_eopnotsupp(struct vop_generic_args *ap); 658int vop_ebadf(struct vop_generic_args *ap); 659int vop_einval(struct vop_generic_args *ap); 660int vop_enotty(struct vop_generic_args *ap); 661int vop_null(struct vop_generic_args *ap); 662int vop_panic(struct vop_generic_args *ap); 663 664/* These are called from within the actual VOPS. */ 665void vop_create_post(void *a, int rc); 666void vop_link_post(void *a, int rc); 667void vop_lock_pre(void *a); 668void vop_lock_post(void *a, int rc); 669void vop_lookup_post(void *a, int rc); 670void vop_lookup_pre(void *a); 671void vop_mkdir_post(void *a, int rc); 672void vop_mknod_post(void *a, int rc); 673void vop_remove_post(void *a, int rc); 674void vop_rename_post(void *a, int rc); 675void vop_rename_pre(void *a); 676void vop_rmdir_post(void *a, int rc); 677void vop_setattr_post(void *a, int rc); 678void vop_strategy_pre(void *a); 679void vop_symlink_post(void *a, int rc); 680void vop_unlock_post(void *a, int rc); 681void vop_unlock_pre(void *a); 682 683#define VOP_WRITE_PRE(ap) \ 684 struct vattr va; \ 685 int error, osize, ooffset, noffset; \ 686 \ 687 osize = ooffset = noffset = 0; \ 688 if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \ 689 error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred, \ 690 curthread); \ 691 if (error) \ 692 return (error); \ 693 ooffset = (ap)->a_uio->uio_offset; \ 694 osize = va.va_size; \ 695 } 696 697#define VOP_WRITE_POST(ap, ret) \ 698 noffset = (ap)->a_uio->uio_offset; \ 699 if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \ 700 VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \ 701 | (noffset > osize ? NOTE_EXTEND : 0)); \ 702 } 703 704#define VOP_LOCK(vp, flags, td) VOP_LOCK1(vp, flags, td, __FILE__, __LINE__) 705 706 707void vput(struct vnode *vp); 708void vrele(struct vnode *vp); 709void vref(struct vnode *vp); 710int vrefcnt(struct vnode *vp); 711void v_addpollinfo(struct vnode *vp); 712 713int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td); 714void vnode_destroy_vobject(struct vnode *vp); 715 716extern struct vop_vector fifo_specops; 717extern struct vop_vector dead_vnodeops; 718extern struct vop_vector default_vnodeops; 719 720#define VOP_PANIC ((void*)(uintptr_t)vop_panic) 721#define VOP_NULL ((void*)(uintptr_t)vop_null) 722#define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) 723#define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) 724#define VOP_EINVAL ((void*)(uintptr_t)vop_einval) 725#define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) 726 727/* vfs_hash.c */ 728typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg); 729 730int vfs_hash_get(const struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 731int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); 732void vfs_hash_rehash(struct vnode *vp, u_int hash); 733void vfs_hash_remove(struct vnode *vp); 734 735int vfs_kqfilter(struct vop_kqfilter_args *); 736void vfs_mark_atime(struct vnode *vp, struct thread *td); 737struct dirent; 738int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off); 739 740#endif /* _KERNEL */ 741 742#endif /* !_SYS_VNODE_H_ */ 743