| 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: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $ |
| 35 | * $DragonFly: src/sys/sys/vnode.h,v 1.83 2008/09/17 21:44:19 dillon Exp $ |
| 36 | */ |
| 37 | |
| 38 | #ifndef _SYS_VNODE_H_ |
| 39 | #define _SYS_VNODE_H_ |
| 40 | |
| 41 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 42 | |
| 43 | #ifndef _SYS_QUEUE_H_ |
| 44 | #include <sys/queue.h> |
| 45 | #endif |
| 46 | #ifndef _SYS_LOCK_H_ |
| 47 | #include <sys/lock.h> |
| 48 | #endif |
| 49 | #ifndef _SYS_SELINFO_H_ |
| 50 | #include <sys/selinfo.h> |
| 51 | #endif |
| 52 | #ifndef _SYS_BIOTRACK_H_ |
| 53 | #include <sys/biotrack.h> |
| 54 | #endif |
| 55 | #ifndef _SYS_UIO_H_ |
| 56 | #include <sys/uio.h> |
| 57 | #endif |
| 58 | #ifndef _SYS_ACL_H_ |
| 59 | #include <sys/acl.h> |
| 60 | #endif |
| 61 | #ifndef _SYS_NAMECACHE_H_ |
| 62 | #include <sys/namecache.h> |
| 63 | #endif |
| 64 | #ifndef _SYS_THREAD_H_ |
| 65 | #include <sys/thread.h> |
| 66 | #endif |
| 67 | #ifndef _SYS_VFSOPS_H_ |
| 68 | #include <sys/vfsops.h> |
| 69 | #endif |
| 70 | #ifndef _SYS_VFSCACHE_H_ |
| 71 | #include <sys/vfscache.h> |
| 72 | #endif |
| 73 | #ifndef _SYS_TREE_H_ |
| 74 | #include <sys/tree.h> |
| 75 | #endif |
| 76 | #ifndef _SYS_SYSLINK_RPC_H_ |
| 77 | #include <sys/syslink_rpc.h> |
| 78 | #endif |
| 79 | #ifndef _SYS_SYSREF_H_ |
| 80 | #include <sys/sysref.h> |
| 81 | #endif |
| 82 | #ifndef _SYS_CCMS_H_ |
| 83 | #include <sys/ccms.h> |
| 84 | #endif |
| 85 | #ifndef _MACHINE_LOCK_H_ |
| 86 | #include <machine/lock.h> |
| 87 | #endif |
| 88 | |
| 89 | /* |
| 90 | * The vnode is the focus of all file activity in UNIX. There is a |
| 91 | * unique vnode allocated for each active file, each current directory, |
| 92 | * each mounted-on file, text file, and the root. |
| 93 | */ |
| 94 | |
| 95 | /* |
| 96 | * Each underlying filesystem allocates its own private area and hangs |
| 97 | * it from v_data. If non-null, this area is freed in getnewvnode(). |
| 98 | */ |
| 99 | TAILQ_HEAD(buflists, buf); |
| 100 | |
| 101 | /* |
| 102 | * Struct for mount options to printable formats. |
| 103 | */ |
| 104 | struct mountctl_opt { |
| 105 | int o_opt; |
| 106 | const char *o_name; |
| 107 | }; |
| 108 | |
| 109 | /* |
| 110 | * Range locks protect offset ranges in files and directories at a high |
| 111 | * level, allowing the actual I/O to be broken down into smaller pieces. |
| 112 | * Range locks will eventually be integrated into the clustered cache |
| 113 | * coherency infrastructure. |
| 114 | * |
| 115 | * We use a simple data structure for now, but eventually this should |
| 116 | * probably be a btree or red-black tree. |
| 117 | */ |
| 118 | struct vrangelock; |
| 119 | |
| 120 | TAILQ_HEAD(vrangelock_list, vrangelock); |
| 121 | |
| 122 | struct vrangehead { |
| 123 | struct vrangelock_list vh_list; |
| 124 | }; |
| 125 | |
| 126 | struct vrangelock { |
| 127 | TAILQ_ENTRY(vrangelock) vr_node; |
| 128 | int vr_flags; |
| 129 | off_t vr_offset; |
| 130 | off_t vr_length; |
| 131 | }; |
| 132 | |
| 133 | #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */ |
| 134 | #define RNGL_CHECK 0x0002 /* check for work on unlock */ |
| 135 | #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */ |
| 136 | #define RNGL_ONLIST 0x0008 /* sanity check */ |
| 137 | |
| 138 | static __inline |
| 139 | void |
| 140 | vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length) |
| 141 | { |
| 142 | vr->vr_flags = flags; |
| 143 | vr->vr_offset = offset; |
| 144 | vr->vr_length = length; |
| 145 | } |
| 146 | |
| 147 | #ifdef _KERNEL |
| 148 | |
| 149 | void vrange_lock(struct vnode *vp, struct vrangelock *vr); |
| 150 | void vrange_unlock(struct vnode *vp, struct vrangelock *vr); |
| 151 | |
| 152 | static __inline |
| 153 | void |
| 154 | vrange_lock_shared(struct vnode *vp, struct vrangelock *vr, |
| 155 | off_t offset, off_t length) |
| 156 | { |
| 157 | vrange_init(vr, RNGL_SHARED, offset, length); |
| 158 | vrange_lock(vp, vr); |
| 159 | } |
| 160 | |
| 161 | static __inline |
| 162 | void |
| 163 | vrange_lock_excl(struct vnode *vp, struct vrangelock *vr, |
| 164 | off_t offset, off_t length) |
| 165 | { |
| 166 | vrange_init(vr, 0, offset, length); |
| 167 | vrange_lock(vp, vr); |
| 168 | } |
| 169 | |
| 170 | #endif |
| 171 | |
| 172 | /* |
| 173 | * The vnode infrastructure is being reorgranized. Most reference-related |
| 174 | * fields are locked by the BGL, and most file I/O related operations and |
| 175 | * vnode teardown functions are locked by the vnode lock. |
| 176 | * |
| 177 | * File read operations require a shared lock, file write operations require |
| 178 | * an exclusive lock. Most directory operations (read or write) currently |
| 179 | * require an exclusive lock due to the side effects stored in the directory |
| 180 | * inode (which we intend to fix). |
| 181 | * |
| 182 | * File reads and writes are further protected by a range lock. The intention |
| 183 | * is to be able to break I/O operations down into more easily managed pieces |
| 184 | * so vm_page arrays can be passed through rather then UIOs. This work will |
| 185 | * occur in multiple stages. The range locks will also eventually be used to |
| 186 | * deal with clustered cache coherency issues and, more immediately, to |
| 187 | * protect operations associated with the kernel-managed journaling module. |
| 188 | * |
| 189 | * NOTE: Certain fields within the vnode structure requires v_token to be |
| 190 | * held. The vnode's normal lock need not be held when accessing |
| 191 | * these fields as long as the vnode is deterministically referenced |
| 192 | * (i.e. can't be ripped out from under the caller). This is typical |
| 193 | * for code paths based on descriptors or file pointers, but not for |
| 194 | * backdoor code paths that come in via the buffer cache. |
| 195 | * |
| 196 | * v_rbclean_tree |
| 197 | * v_rbdirty_tree |
| 198 | * v_rbhash_tree |
| 199 | * v_pollinfo |
| 200 | * |
| 201 | * NOTE: The vnode operations vector, v_ops, is a double-indirect that |
| 202 | * typically points to &v_mount->mnt_vn_use_ops. We use a double |
| 203 | * pointer because mnt_vn_use_ops may change dynamically when e.g. |
| 204 | * journaling is turned on or off. |
| 205 | * |
| 206 | * NOTE: v_filesize is currently only applicable when a VM object is |
| 207 | * associated with the vnode. Otherwise it will be set to NOOFFSET. |
| 208 | * |
| 209 | * NOTE: The following fields require a spin or token lock. Note that |
| 210 | * additional subsystems may use v_token or v_spinlock for other |
| 211 | * purposes, e.g. vfs/fifofs/fifo_vnops.c |
| 212 | * |
| 213 | * v_namecache v_spinlock |
| 214 | * v_rb* v_token |
| 215 | */ |
| 216 | RB_HEAD(buf_rb_tree, buf); |
| 217 | RB_HEAD(buf_rb_hash, buf); |
| 218 | |
| 219 | struct vnode { |
| 220 | int v_flag; /* vnode flags (see below) */ |
| 221 | int v_writecount; |
| 222 | int v_opencount; /* number of explicit opens */ |
| 223 | int v_auxrefs; /* auxiliary references */ |
| 224 | struct sysref v_sysref; /* normal references */ |
| 225 | struct bio_track v_track_read; /* track I/O's in progress */ |
| 226 | struct bio_track v_track_write; /* track I/O's in progress */ |
| 227 | struct mount *v_mount; /* ptr to vfs we are in */ |
| 228 | struct vop_ops **v_ops; /* vnode operations vector */ |
| 229 | TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist/cachelist */ |
| 230 | TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */ |
| 231 | struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */ |
| 232 | struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */ |
| 233 | struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */ |
| 234 | LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */ |
| 235 | enum vtype v_type; /* vnode type */ |
| 236 | union { |
| 237 | struct socket *vu_socket; /* unix ipc (VSOCK) */ |
| 238 | struct { |
| 239 | int vu_umajor; /* device number for attach */ |
| 240 | int vu_uminor; |
| 241 | struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */ |
| 242 | SLIST_ENTRY(vnode) vu_cdevnext; |
| 243 | } vu_cdev; |
| 244 | struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ |
| 245 | } v_un; |
| 246 | off_t v_filesize; /* file EOF or NOOFFSET */ |
| 247 | off_t v_lazyw; /* lazy write iterator */ |
| 248 | off_t v_lastw; /* last write (write cluster) */ |
| 249 | off_t v_cstart; /* start block of cluster */ |
| 250 | off_t v_lasta; /* last allocation */ |
| 251 | int v_clen; /* length of current cluster */ |
| 252 | struct vm_object *v_object; /* Place to store VM object */ |
| 253 | struct lock v_lock; /* file/dir ops lock */ |
| 254 | struct lwkt_token v_token; /* (see above) */ |
| 255 | enum vtagtype v_tag; /* type of underlying data */ |
| 256 | void *v_data; /* private data for fs */ |
| 257 | struct namecache_list v_namecache; /* (S) associated nc entries */ |
| 258 | struct { |
| 259 | struct selinfo vpi_selinfo; /* identity of poller(s) */ |
| 260 | short vpi_events; /* what they are looking for */ |
| 261 | short vpi_revents; /* what has happened */ |
| 262 | } v_pollinfo; |
| 263 | struct vmresident *v_resident; /* optional vmresident */ |
| 264 | struct vrangehead v_range; /* range lock */ |
| 265 | struct ccms_dataspace v_ccms; /* cache coherency */ |
| 266 | #ifdef DEBUG_LOCKS |
| 267 | const char *filename; /* Source file doing locking */ |
| 268 | int line; /* Line number doing locking */ |
| 269 | #endif |
| 270 | void *v_xaddr; |
| 271 | }; |
| 272 | #define v_socket v_un.vu_socket |
| 273 | #define v_umajor v_un.vu_cdev.vu_umajor |
| 274 | #define v_uminor v_un.vu_cdev.vu_uminor |
| 275 | #define v_rdev v_un.vu_cdev.vu_cdevinfo |
| 276 | #define v_cdevnext v_un.vu_cdev.vu_cdevnext |
| 277 | #define v_fifoinfo v_un.vu_fifoinfo |
| 278 | #define v_spinlock v_lock.lk_spinlock |
| 279 | |
| 280 | /* |
| 281 | * Vnode flags. |
| 282 | */ |
| 283 | #define VROOT 0x00000001 /* root of its file system */ |
| 284 | #define VTEXT 0x00000002 /* vnode is a pure text prototype */ |
| 285 | #define VSYSTEM 0x00000004 /* vnode being used by kernel */ |
| 286 | #define VISTTY 0x00000008 /* vnode represents a tty */ |
| 287 | #define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */ |
| 288 | #define VCKPT 0x00000020 /* checkpoint-restored vnode */ |
| 289 | /* open for business 0x00000040 */ |
| 290 | #define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */ |
| 291 | #define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */ |
| 292 | /* open for business 0x00000200 */ |
| 293 | #define VAGE0 0x00000400 /* Age count for recycling - 2 bits */ |
| 294 | #define VAGE1 0x00000800 /* Age count for recycling - 2 bits */ |
| 295 | #define VCACHED 0x00001000 /* No active references but has cache value */ |
| 296 | #define VOBJBUF 0x00002000 /* Allocate buffers in VM object */ |
| 297 | #define VINACTIVE 0x00004000 /* The vnode is inactive (did VOP_INACTIVE) */ |
| 298 | /* open for business 0x00008000 */ |
| 299 | #define VOLOCK 0x00010000 /* vnode is locked waiting for an object */ |
| 300 | #define VOWANT 0x00020000 /* a process is waiting for VOLOCK */ |
| 301 | #define VRECLAIMED 0x00040000 /* This vnode has been destroyed */ |
| 302 | #define VFREE 0x00080000 /* This vnode is on the freelist */ |
| 303 | #define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */ |
| 304 | #define VONWORKLST 0x00200000 /* On syncer work-list */ |
| 305 | #define VMOUNT 0x00400000 /* Mount in progress */ |
| 306 | #define VOBJDIRTY 0x00800000 /* object might be dirty */ |
| 307 | #define VSWAPCACHE 0x01000000 /* enable swapcache */ |
| 308 | /* open for business 0x02000000 */ |
| 309 | /* open for business 0x04000000 */ |
| 310 | |
| 311 | /* |
| 312 | * vmntvnodescan() flags |
| 313 | */ |
| 314 | #define VMSC_GETVP 0x01 |
| 315 | #define VMSC_GETVX 0x02 |
| 316 | #define VMSC_NOWAIT 0x10 |
| 317 | #define VMSC_ONEPASS 0x20 |
| 318 | |
| 319 | /* |
| 320 | * Flags for ioflag. (high 16 bits used to ask for read-ahead and |
| 321 | * help with write clustering) |
| 322 | */ |
| 323 | #define IO_UNIT 0x0001 /* do I/O as atomic unit */ |
| 324 | #define IO_APPEND 0x0002 /* append write to end */ |
| 325 | #define IO_SYNC 0x0004 /* do I/O synchronously */ |
| 326 | #define IO_NODELOCKED 0x0008 /* underlying node already locked */ |
| 327 | #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */ |
| 328 | #define IO_VMIO 0x0020 /* data already in VMIO space */ |
| 329 | #define IO_INVAL 0x0040 /* invalidate after I/O */ |
| 330 | #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */ |
| 331 | #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ |
| 332 | #define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */ |
| 333 | #define IO_CORE 0x0400 /* I/O is part of core dump */ |
| 334 | |
| 335 | #define IO_SEQMAX 0x7F /* seq heuristic max value */ |
| 336 | #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ |
| 337 | |
| 338 | /* |
| 339 | * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID, |
| 340 | * and SVTX flag bits. |
| 341 | */ |
| 342 | #define VSUID 04000 /* set user id on execution */ |
| 343 | #define VSGID 02000 /* set group id on execution */ |
| 344 | #define VSVTX 01000 /* save swapped text even after use */ |
| 345 | #define VREAD 00400 /* read, write, execute permissions */ |
| 346 | #define VWRITE 00200 |
| 347 | #define VEXEC 00100 |
| 348 | |
| 349 | /* |
| 350 | * Token indicating no attribute value yet assigned. |
| 351 | */ |
| 352 | #define VNOVAL (-1) |
| 353 | |
| 354 | /* |
| 355 | * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) |
| 356 | */ |
| 357 | #define VLKTIMEOUT (hz / 20 + 1) |
| 358 | |
| 359 | #ifdef _KERNEL |
| 360 | |
| 361 | /* |
| 362 | * Convert between vnode types and inode formats (since POSIX.1 |
| 363 | * defines mode word of stat structure in terms of inode formats). |
| 364 | */ |
| 365 | extern enum vtype iftovt_tab[]; |
| 366 | extern int vttoif_tab[]; |
| 367 | #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) |
| 368 | #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) |
| 369 | #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) |
| 370 | |
| 371 | /* |
| 372 | * Flags to various vnode functions. |
| 373 | */ |
| 374 | #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ |
| 375 | #define FORCECLOSE 0x0002 /* vflush: force file closure */ |
| 376 | #define WRITECLOSE 0x0004 /* vflush: only close writable files */ |
| 377 | #define DOCLOSE 0x0008 /* vclean: close active files */ |
| 378 | #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ |
| 379 | |
| 380 | #ifdef DIAGNOSTIC |
| 381 | #define VATTR_NULL(vap) vattr_null(vap) |
| 382 | #else |
| 383 | #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ |
| 384 | #endif /* DIAGNOSTIC */ |
| 385 | |
| 386 | #define NULLVP ((struct vnode *)NULL) |
| 387 | |
| 388 | #define VNODEOP_SET(f) \ |
| 389 | SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \ |
| 390 | SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f); |
| 391 | |
| 392 | /* |
| 393 | * Global vnode data. |
| 394 | */ |
| 395 | struct objcache; |
| 396 | |
| 397 | extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ |
| 398 | extern struct nchandle rootnch; /* root (i.e. "/") namecache */ |
| 399 | extern int desiredvnodes; /* number of vnodes desired */ |
| 400 | extern time_t syncdelay; /* max time to delay syncing data */ |
| 401 | extern time_t filedelay; /* time to delay syncing files */ |
| 402 | extern time_t dirdelay; /* time to delay syncing directories */ |
| 403 | extern time_t metadelay; /* time to delay syncing metadata */ |
| 404 | extern struct objcache *namei_oc; |
| 405 | extern int prtactive; /* nonzero to call vprint() */ |
| 406 | extern struct vattr va_null; /* predefined null vattr structure */ |
| 407 | extern int vfs_ioopt; |
| 408 | extern int numvnodes; |
| 409 | extern int freevnodes; |
| 410 | |
| 411 | /* |
| 412 | * Interlock for scanning list of vnodes attached to a mountpoint |
| 413 | */ |
| 414 | extern struct lwkt_token mntvnode_token; |
| 415 | |
| 416 | /* |
| 417 | * This macro is very helpful in defining those offsets in the vdesc struct. |
| 418 | * |
| 419 | * This is stolen from X11R4. I ignored all the fancy stuff for |
| 420 | * Crays, so if you decide to port this to such a serious machine, |
| 421 | * you might want to consult Intrinsic.h's XtOffset{,Of,To}. |
| 422 | */ |
| 423 | #define VOPARG_OFFSET(p_type,field) \ |
| 424 | ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) |
| 425 | #define VOPARG_OFFSETOF(s_type,field) \ |
| 426 | VOPARG_OFFSET(s_type*,field) |
| 427 | #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ |
| 428 | ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) |
| 429 | |
| 430 | typedef int (*vnodeopv_entry_t)(struct vop_generic_args *); |
| 431 | |
| 432 | /* |
| 433 | * VOCALL calls an op given an ops vector. We break it out because BSD's |
| 434 | * vclean changes the ops vector and then wants to call ops with the old |
| 435 | * vector. |
| 436 | */ |
| 437 | |
| 438 | typedef int (*vocall_func_t)(struct vop_generic_args *); |
| 439 | |
| 440 | /* |
| 441 | * This call executes the vops vector for the offset stored in the ap's |
| 442 | * descriptor of the passed vops rather then the one related to the |
| 443 | * ap's vop_ops structure. It is used to chain VOPS calls on behalf of |
| 444 | * filesystems from a VFS's context ONLY (that is, from a VFS's own vops |
| 445 | * vector function). |
| 446 | */ |
| 447 | #define VOCALL(vops, ap) \ |
| 448 | (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap) |
| 449 | |
| 450 | #define VDESC(OP) (& __CONCAT(OP,_desc)) |
| 451 | |
| 452 | /* |
| 453 | * Public vnode manipulation functions. |
| 454 | */ |
| 455 | struct file; |
| 456 | struct mount; |
| 457 | struct nlookupdata; |
| 458 | struct proc; |
| 459 | struct thread; |
| 460 | struct stat; |
| 461 | struct ucred; |
| 462 | struct uio; |
| 463 | struct vattr; |
| 464 | struct vnode; |
| 465 | |
| 466 | struct vnode *getsynthvnode(const char *devname); |
| 467 | void addaliasu (struct vnode *vp, int x, int y); |
| 468 | int v_associate_rdev(struct vnode *vp, cdev_t dev); |
| 469 | void v_release_rdev(struct vnode *vp); |
| 470 | int bdevvp (cdev_t dev, struct vnode **vpp); |
| 471 | struct vnode *allocvnode(int lktimeout, int lkflags); |
| 472 | int freesomevnodes(int count); |
| 473 | int getnewvnode (enum vtagtype tag, struct mount *mp, |
| 474 | struct vnode **vpp, int timo, int lkflags); |
| 475 | int getspecialvnode (enum vtagtype tag, struct mount *mp, |
| 476 | struct vop_ops **ops, struct vnode **vpp, int timo, |
| 477 | int lkflags); |
| 478 | int speedup_syncer (void); |
| 479 | int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *); |
| 480 | void vattr_null (struct vattr *vap); |
| 481 | int vcount (struct vnode *vp); |
| 482 | int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp); |
| 483 | void vfs_nadd_vnodeops_sysinit (void *); |
| 484 | void vfs_nrm_vnodeops_sysinit (void *); |
| 485 | void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); |
| 486 | void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **); |
| 487 | int vflush (struct mount *mp, int rootrefs, int flags); |
| 488 | int vmntvnodescan(struct mount *mp, int flags, |
| 489 | int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data), |
| 490 | int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data), |
| 491 | void *data); |
| 492 | void insmntque(struct vnode *vp, struct mount *mp); |
| 493 | |
| 494 | void vclean_vxlocked (struct vnode *vp, int flags); |
| 495 | void vclean_unlocked (struct vnode *vp); |
| 496 | void vgone_vxlocked (struct vnode *vp); |
| 497 | int vrevoke (struct vnode *vp, struct ucred *cred); |
| 498 | int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo); |
| 499 | int vtruncbuf (struct vnode *vp, off_t length, int blksize); |
| 500 | void vnode_pager_setsize (struct vnode *, vm_ooffset_t); |
| 501 | int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff); |
| 502 | int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength, |
| 503 | int oblksize, int nblksize, |
| 504 | int oboff, int nboff, int trivial); |
| 505 | void nvnode_pager_setsize (struct vnode *vp, off_t length, |
| 506 | int blksize, int boff); |
| 507 | int vfsync(struct vnode *vp, int waitfor, int passes, |
| 508 | int (*checkdef)(struct buf *), |
| 509 | int (*waitoutput)(struct vnode *, struct thread *)); |
| 510 | int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff); |
| 511 | void vprint (char *label, struct vnode *vp); |
| 512 | int vrecycle (struct vnode *vp); |
| 513 | int vmaxiosize (struct vnode *vp); |
| 514 | void vn_strategy(struct vnode *vp, struct bio *bio); |
| 515 | int vn_cache_strategy(struct vnode *vp, struct bio *bio); |
| 516 | int vn_close (struct vnode *vp, int flags); |
| 517 | int vn_isdisk (struct vnode *vp, int *errp); |
| 518 | int vn_lock (struct vnode *vp, int flags); |
| 519 | int vn_islocked (struct vnode *vp); |
| 520 | int vn_islocked_unlock (struct vnode *vp); |
| 521 | void vn_islocked_relock (struct vnode *vp, int vpls); |
| 522 | void vn_unlock (struct vnode *vp); |
| 523 | #ifdef DEBUG_LOCKS |
| 524 | int debug_vn_lock (struct vnode *vp, int flags, |
| 525 | const char *filename, int line); |
| 526 | #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__) |
| 527 | #endif |
| 528 | |
| 529 | int vn_get_namelen(struct vnode *, int *); |
| 530 | void vn_setspecops (struct file *fp); |
| 531 | int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess); |
| 532 | int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode); |
| 533 | int vn_opendisk (const char *devname, int fmode, struct vnode **vpp); |
| 534 | void vn_pollevent (struct vnode *vp, int events); |
| 535 | void vn_pollgone (struct vnode *vp); |
| 536 | int vn_pollrecord (struct vnode *vp, int events); |
| 537 | int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base, |
| 538 | int len, off_t offset, enum uio_seg segflg, int ioflg, |
| 539 | struct ucred *cred, int *aresid); |
| 540 | int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base, |
| 541 | int len, off_t offset, enum uio_seg segflg, int ioflg, |
| 542 | struct ucred *cred, int *aresid); |
| 543 | int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred); |
| 544 | cdev_t vn_todev (struct vnode *vp); |
| 545 | void vfs_timestamp (struct timespec *); |
| 546 | size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp); |
| 547 | void vn_mark_atime(struct vnode *vp, struct thread *td); |
| 548 | int vn_writechk (struct vnode *vp, struct nchandle *nch); |
| 549 | int ncp_writechk(struct nchandle *nch); |
| 550 | int vop_stdopen (struct vop_open_args *ap); |
| 551 | int vop_stdclose (struct vop_close_args *ap); |
| 552 | int vop_stdmountctl(struct vop_mountctl_args *ap); |
| 553 | int vop_stdgetpages(struct vop_getpages_args *ap); |
| 554 | int vop_stdputpages(struct vop_putpages_args *ap); |
| 555 | int vop_stdmarkatime(struct vop_markatime_args *ap); |
| 556 | int vop_stdnoread(struct vop_read_args *ap); |
| 557 | int vop_stdnowrite(struct vop_write_args *ap); |
| 558 | int vop_stdpathconf (struct vop_pathconf_args *ap); |
| 559 | int vop_eopnotsupp (struct vop_generic_args *ap); |
| 560 | int vop_ebadf (struct vop_generic_args *ap); |
| 561 | int vop_einval (struct vop_generic_args *ap); |
| 562 | int vop_enotty (struct vop_generic_args *ap); |
| 563 | int vop_defaultop (struct vop_generic_args *ap); |
| 564 | int vop_null (struct vop_generic_args *ap); |
| 565 | int vop_panic (struct vop_generic_args *ap); |
| 566 | int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t, |
| 567 | const char *); |
| 568 | |
| 569 | int vop_compat_nresolve(struct vop_nresolve_args *ap); |
| 570 | int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap); |
| 571 | int vop_compat_ncreate(struct vop_ncreate_args *ap); |
| 572 | int vop_compat_nmkdir(struct vop_nmkdir_args *ap); |
| 573 | int vop_compat_nmknod(struct vop_nmknod_args *ap); |
| 574 | int vop_compat_nlink(struct vop_nlink_args *ap); |
| 575 | int vop_compat_nsymlink(struct vop_nsymlink_args *ap); |
| 576 | int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap); |
| 577 | int vop_compat_nremove(struct vop_nremove_args *ap); |
| 578 | int vop_compat_nrmdir(struct vop_nrmdir_args *ap); |
| 579 | int vop_compat_nrename(struct vop_nrename_args *ap); |
| 580 | |
| 581 | void vx_lock (struct vnode *vp); |
| 582 | void vx_unlock (struct vnode *vp); |
| 583 | void vx_get (struct vnode *vp); |
| 584 | int vx_get_nonblock (struct vnode *vp); |
| 585 | void vx_put (struct vnode *vp); |
| 586 | int vget (struct vnode *vp, int lockflag); |
| 587 | void vput (struct vnode *vp); |
| 588 | void vhold (struct vnode *); |
| 589 | void vhold_interlocked (struct vnode *); |
| 590 | void vdrop (struct vnode *); |
| 591 | void vref (struct vnode *vp); |
| 592 | void vrele (struct vnode *vp); |
| 593 | void vsetflags (struct vnode *vp, int flags); |
| 594 | void vclrflags (struct vnode *vp, int flags); |
| 595 | |
| 596 | void vfs_subr_init(void); |
| 597 | void vfs_mount_init(void); |
| 598 | void vfs_lock_init(void); |
| 599 | void vfs_sync_init(void); |
| 600 | void mount_init(struct mount *mp); |
| 601 | |
| 602 | void vn_syncer_add_to_worklist(struct vnode *, int); |
| 603 | void vnlru_proc_wait(void); |
| 604 | |
| 605 | extern struct vop_ops default_vnode_vops; |
| 606 | extern struct vop_ops dead_vnode_vops; |
| 607 | |
| 608 | extern struct vop_ops *default_vnode_vops_p; |
| 609 | extern struct vop_ops *dead_vnode_vops_p; |
| 610 | |
| 611 | #endif /* _KERNEL */ |
| 612 | |
| 613 | #endif /* _KERNEL || _KERNEL_STRUCTURES */ |
| 614 | #endif /* !_SYS_VNODE_H_ */ |