| 1 | /* $NetBSD: vfs_subr.c,v 1.451 2016/11/03 11:04:21 hannken Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1997, 1998, 2004, 2005, 2007, 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
| 9 | * NASA Ames Research Center, by Charles M. Hannum, by Andrew Doran, |
| 10 | * by Marshall Kirk McKusick and Greg Ganger at the University of Michigan. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 23 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | * POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * Copyright (c) 1989, 1993 |
| 36 | * The Regents of the University of California. All rights reserved. |
| 37 | * (c) UNIX System Laboratories, Inc. |
| 38 | * All or some portions of this file are derived from material licensed |
| 39 | * to the University of California by American Telephone and Telegraph |
| 40 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 41 | * the permission of UNIX System Laboratories, Inc. |
| 42 | * |
| 43 | * Redistribution and use in source and binary forms, with or without |
| 44 | * modification, are permitted provided that the following conditions |
| 45 | * are met: |
| 46 | * 1. Redistributions of source code must retain the above copyright |
| 47 | * notice, this list of conditions and the following disclaimer. |
| 48 | * 2. Redistributions in binary form must reproduce the above copyright |
| 49 | * notice, this list of conditions and the following disclaimer in the |
| 50 | * documentation and/or other materials provided with the distribution. |
| 51 | * 3. Neither the name of the University nor the names of its contributors |
| 52 | * may be used to endorse or promote products derived from this software |
| 53 | * without specific prior written permission. |
| 54 | * |
| 55 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 56 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 57 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 58 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 59 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 60 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 61 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 62 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 63 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 64 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 65 | * SUCH DAMAGE. |
| 66 | * |
| 67 | * @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94 |
| 68 | */ |
| 69 | |
| 70 | #include <sys/cdefs.h> |
| 71 | __KERNEL_RCSID(0, "$NetBSD: vfs_subr.c,v 1.451 2016/11/03 11:04:21 hannken Exp $" ); |
| 72 | |
| 73 | #ifdef _KERNEL_OPT |
| 74 | #include "opt_ddb.h" |
| 75 | #include "opt_compat_netbsd.h" |
| 76 | #include "opt_compat_43.h" |
| 77 | #endif |
| 78 | |
| 79 | #include <sys/param.h> |
| 80 | #include <sys/systm.h> |
| 81 | #include <sys/conf.h> |
| 82 | #include <sys/dirent.h> |
| 83 | #include <sys/filedesc.h> |
| 84 | #include <sys/kernel.h> |
| 85 | #include <sys/mount.h> |
| 86 | #include <sys/vnode_impl.h> |
| 87 | #include <sys/stat.h> |
| 88 | #include <sys/sysctl.h> |
| 89 | #include <sys/namei.h> |
| 90 | #include <sys/buf.h> |
| 91 | #include <sys/errno.h> |
| 92 | #include <sys/kmem.h> |
| 93 | #include <sys/syscallargs.h> |
| 94 | #include <sys/kauth.h> |
| 95 | #include <sys/module.h> |
| 96 | |
| 97 | #include <miscfs/genfs/genfs.h> |
| 98 | #include <miscfs/specfs/specdev.h> |
| 99 | #include <uvm/uvm_ddb.h> |
| 100 | |
| 101 | const enum vtype iftovt_tab[16] = { |
| 102 | VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, |
| 103 | VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, |
| 104 | }; |
| 105 | const int vttoif_tab[9] = { |
| 106 | 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, |
| 107 | S_IFSOCK, S_IFIFO, S_IFMT, |
| 108 | }; |
| 109 | |
| 110 | /* |
| 111 | * Insq/Remq for the vnode usage lists. |
| 112 | */ |
| 113 | #define bufinsvn(bp, dp) LIST_INSERT_HEAD(dp, bp, b_vnbufs) |
| 114 | #define bufremvn(bp) { \ |
| 115 | LIST_REMOVE(bp, b_vnbufs); \ |
| 116 | (bp)->b_vnbufs.le_next = NOLIST; \ |
| 117 | } |
| 118 | |
| 119 | int doforce = 1; /* 1 => permit forcible unmounting */ |
| 120 | int prtactive = 0; /* 1 => print out reclaim of active vnodes */ |
| 121 | |
| 122 | extern struct mount *dead_rootmount; |
| 123 | |
| 124 | /* |
| 125 | * Local declarations. |
| 126 | */ |
| 127 | |
| 128 | static void vn_initialize_syncerd(void); |
| 129 | |
| 130 | /* |
| 131 | * Initialize the vnode management data structures. |
| 132 | */ |
| 133 | void |
| 134 | vntblinit(void) |
| 135 | { |
| 136 | |
| 137 | vn_initialize_syncerd(); |
| 138 | vfs_mount_sysinit(); |
| 139 | vfs_vnode_sysinit(); |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Flush out and invalidate all buffers associated with a vnode. |
| 144 | * Called with the underlying vnode locked, which should prevent new dirty |
| 145 | * buffers from being queued. |
| 146 | */ |
| 147 | int |
| 148 | vinvalbuf(struct vnode *vp, int flags, kauth_cred_t cred, struct lwp *l, |
| 149 | bool catch_p, int slptimeo) |
| 150 | { |
| 151 | struct buf *bp, *nbp; |
| 152 | int error; |
| 153 | int flushflags = PGO_ALLPAGES | PGO_FREE | PGO_SYNCIO | |
| 154 | (flags & V_SAVE ? PGO_CLEANIT | PGO_RECLAIM : 0); |
| 155 | |
| 156 | /* XXXUBC this doesn't look at flags or slp* */ |
| 157 | mutex_enter(vp->v_interlock); |
| 158 | error = VOP_PUTPAGES(vp, 0, 0, flushflags); |
| 159 | if (error) { |
| 160 | return error; |
| 161 | } |
| 162 | |
| 163 | if (flags & V_SAVE) { |
| 164 | error = VOP_FSYNC(vp, cred, FSYNC_WAIT|FSYNC_RECLAIM, 0, 0); |
| 165 | if (error) |
| 166 | return (error); |
| 167 | KASSERT(LIST_EMPTY(&vp->v_dirtyblkhd)); |
| 168 | } |
| 169 | |
| 170 | mutex_enter(&bufcache_lock); |
| 171 | restart: |
| 172 | for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 173 | KASSERT(bp->b_vp == vp); |
| 174 | nbp = LIST_NEXT(bp, b_vnbufs); |
| 175 | error = bbusy(bp, catch_p, slptimeo, NULL); |
| 176 | if (error != 0) { |
| 177 | if (error == EPASSTHROUGH) |
| 178 | goto restart; |
| 179 | mutex_exit(&bufcache_lock); |
| 180 | return (error); |
| 181 | } |
| 182 | brelsel(bp, BC_INVAL | BC_VFLUSH); |
| 183 | } |
| 184 | |
| 185 | for (bp = LIST_FIRST(&vp->v_cleanblkhd); bp; bp = nbp) { |
| 186 | KASSERT(bp->b_vp == vp); |
| 187 | nbp = LIST_NEXT(bp, b_vnbufs); |
| 188 | error = bbusy(bp, catch_p, slptimeo, NULL); |
| 189 | if (error != 0) { |
| 190 | if (error == EPASSTHROUGH) |
| 191 | goto restart; |
| 192 | mutex_exit(&bufcache_lock); |
| 193 | return (error); |
| 194 | } |
| 195 | /* |
| 196 | * XXX Since there are no node locks for NFS, I believe |
| 197 | * there is a slight chance that a delayed write will |
| 198 | * occur while sleeping just above, so check for it. |
| 199 | */ |
| 200 | if ((bp->b_oflags & BO_DELWRI) && (flags & V_SAVE)) { |
| 201 | #ifdef DEBUG |
| 202 | printf("buffer still DELWRI\n" ); |
| 203 | #endif |
| 204 | bp->b_cflags |= BC_BUSY | BC_VFLUSH; |
| 205 | mutex_exit(&bufcache_lock); |
| 206 | VOP_BWRITE(bp->b_vp, bp); |
| 207 | mutex_enter(&bufcache_lock); |
| 208 | goto restart; |
| 209 | } |
| 210 | brelsel(bp, BC_INVAL | BC_VFLUSH); |
| 211 | } |
| 212 | |
| 213 | #ifdef DIAGNOSTIC |
| 214 | if (!LIST_EMPTY(&vp->v_cleanblkhd) || !LIST_EMPTY(&vp->v_dirtyblkhd)) |
| 215 | panic("vinvalbuf: flush failed, vp %p" , vp); |
| 216 | #endif |
| 217 | |
| 218 | mutex_exit(&bufcache_lock); |
| 219 | |
| 220 | return (0); |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Destroy any in core blocks past the truncation length. |
| 225 | * Called with the underlying vnode locked, which should prevent new dirty |
| 226 | * buffers from being queued. |
| 227 | */ |
| 228 | int |
| 229 | vtruncbuf(struct vnode *vp, daddr_t lbn, bool catch_p, int slptimeo) |
| 230 | { |
| 231 | struct buf *bp, *nbp; |
| 232 | int error; |
| 233 | voff_t off; |
| 234 | |
| 235 | off = round_page((voff_t)lbn << vp->v_mount->mnt_fs_bshift); |
| 236 | mutex_enter(vp->v_interlock); |
| 237 | error = VOP_PUTPAGES(vp, off, 0, PGO_FREE | PGO_SYNCIO); |
| 238 | if (error) { |
| 239 | return error; |
| 240 | } |
| 241 | |
| 242 | mutex_enter(&bufcache_lock); |
| 243 | restart: |
| 244 | for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 245 | KASSERT(bp->b_vp == vp); |
| 246 | nbp = LIST_NEXT(bp, b_vnbufs); |
| 247 | if (bp->b_lblkno < lbn) |
| 248 | continue; |
| 249 | error = bbusy(bp, catch_p, slptimeo, NULL); |
| 250 | if (error != 0) { |
| 251 | if (error == EPASSTHROUGH) |
| 252 | goto restart; |
| 253 | mutex_exit(&bufcache_lock); |
| 254 | return (error); |
| 255 | } |
| 256 | brelsel(bp, BC_INVAL | BC_VFLUSH); |
| 257 | } |
| 258 | |
| 259 | for (bp = LIST_FIRST(&vp->v_cleanblkhd); bp; bp = nbp) { |
| 260 | KASSERT(bp->b_vp == vp); |
| 261 | nbp = LIST_NEXT(bp, b_vnbufs); |
| 262 | if (bp->b_lblkno < lbn) |
| 263 | continue; |
| 264 | error = bbusy(bp, catch_p, slptimeo, NULL); |
| 265 | if (error != 0) { |
| 266 | if (error == EPASSTHROUGH) |
| 267 | goto restart; |
| 268 | mutex_exit(&bufcache_lock); |
| 269 | return (error); |
| 270 | } |
| 271 | brelsel(bp, BC_INVAL | BC_VFLUSH); |
| 272 | } |
| 273 | mutex_exit(&bufcache_lock); |
| 274 | |
| 275 | return (0); |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * Flush all dirty buffers from a vnode. |
| 280 | * Called with the underlying vnode locked, which should prevent new dirty |
| 281 | * buffers from being queued. |
| 282 | */ |
| 283 | int |
| 284 | vflushbuf(struct vnode *vp, int flags) |
| 285 | { |
| 286 | struct buf *bp, *nbp; |
| 287 | int error, pflags; |
| 288 | bool dirty, sync; |
| 289 | |
| 290 | sync = (flags & FSYNC_WAIT) != 0; |
| 291 | pflags = PGO_CLEANIT | PGO_ALLPAGES | |
| 292 | (sync ? PGO_SYNCIO : 0) | |
| 293 | ((flags & FSYNC_LAZY) ? PGO_LAZY : 0); |
| 294 | mutex_enter(vp->v_interlock); |
| 295 | (void) VOP_PUTPAGES(vp, 0, 0, pflags); |
| 296 | |
| 297 | loop: |
| 298 | mutex_enter(&bufcache_lock); |
| 299 | for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { |
| 300 | KASSERT(bp->b_vp == vp); |
| 301 | nbp = LIST_NEXT(bp, b_vnbufs); |
| 302 | if ((bp->b_cflags & BC_BUSY)) |
| 303 | continue; |
| 304 | if ((bp->b_oflags & BO_DELWRI) == 0) |
| 305 | panic("vflushbuf: not dirty, bp %p" , bp); |
| 306 | bp->b_cflags |= BC_BUSY | BC_VFLUSH; |
| 307 | mutex_exit(&bufcache_lock); |
| 308 | /* |
| 309 | * Wait for I/O associated with indirect blocks to complete, |
| 310 | * since there is no way to quickly wait for them below. |
| 311 | */ |
| 312 | if (bp->b_vp == vp || !sync) |
| 313 | (void) bawrite(bp); |
| 314 | else { |
| 315 | error = bwrite(bp); |
| 316 | if (error) |
| 317 | return error; |
| 318 | } |
| 319 | goto loop; |
| 320 | } |
| 321 | mutex_exit(&bufcache_lock); |
| 322 | |
| 323 | if (!sync) |
| 324 | return 0; |
| 325 | |
| 326 | mutex_enter(vp->v_interlock); |
| 327 | while (vp->v_numoutput != 0) |
| 328 | cv_wait(&vp->v_cv, vp->v_interlock); |
| 329 | dirty = !LIST_EMPTY(&vp->v_dirtyblkhd); |
| 330 | mutex_exit(vp->v_interlock); |
| 331 | |
| 332 | if (dirty) { |
| 333 | vprint("vflushbuf: dirty" , vp); |
| 334 | goto loop; |
| 335 | } |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * Create a vnode for a block device. |
| 342 | * Used for root filesystem and swap areas. |
| 343 | * Also used for memory file system special devices. |
| 344 | */ |
| 345 | int |
| 346 | bdevvp(dev_t dev, vnode_t **vpp) |
| 347 | { |
| 348 | struct vattr va; |
| 349 | |
| 350 | vattr_null(&va); |
| 351 | va.va_type = VBLK; |
| 352 | va.va_rdev = dev; |
| 353 | |
| 354 | return vcache_new(dead_rootmount, NULL, &va, NOCRED, vpp); |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * Create a vnode for a character device. |
| 359 | * Used for kernfs and some console handling. |
| 360 | */ |
| 361 | int |
| 362 | cdevvp(dev_t dev, vnode_t **vpp) |
| 363 | { |
| 364 | struct vattr va; |
| 365 | |
| 366 | vattr_null(&va); |
| 367 | va.va_type = VCHR; |
| 368 | va.va_rdev = dev; |
| 369 | |
| 370 | return vcache_new(dead_rootmount, NULL, &va, NOCRED, vpp); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * Associate a buffer with a vnode. There must already be a hold on |
| 375 | * the vnode. |
| 376 | */ |
| 377 | void |
| 378 | bgetvp(struct vnode *vp, struct buf *bp) |
| 379 | { |
| 380 | |
| 381 | KASSERT(bp->b_vp == NULL); |
| 382 | KASSERT(bp->b_objlock == &buffer_lock); |
| 383 | KASSERT(mutex_owned(vp->v_interlock)); |
| 384 | KASSERT(mutex_owned(&bufcache_lock)); |
| 385 | KASSERT((bp->b_cflags & BC_BUSY) != 0); |
| 386 | KASSERT(!cv_has_waiters(&bp->b_done)); |
| 387 | |
| 388 | vholdl(vp); |
| 389 | bp->b_vp = vp; |
| 390 | if (vp->v_type == VBLK || vp->v_type == VCHR) |
| 391 | bp->b_dev = vp->v_rdev; |
| 392 | else |
| 393 | bp->b_dev = NODEV; |
| 394 | |
| 395 | /* |
| 396 | * Insert onto list for new vnode. |
| 397 | */ |
| 398 | bufinsvn(bp, &vp->v_cleanblkhd); |
| 399 | bp->b_objlock = vp->v_interlock; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Disassociate a buffer from a vnode. |
| 404 | */ |
| 405 | void |
| 406 | brelvp(struct buf *bp) |
| 407 | { |
| 408 | struct vnode *vp = bp->b_vp; |
| 409 | |
| 410 | KASSERT(vp != NULL); |
| 411 | KASSERT(bp->b_objlock == vp->v_interlock); |
| 412 | KASSERT(mutex_owned(vp->v_interlock)); |
| 413 | KASSERT(mutex_owned(&bufcache_lock)); |
| 414 | KASSERT((bp->b_cflags & BC_BUSY) != 0); |
| 415 | KASSERT(!cv_has_waiters(&bp->b_done)); |
| 416 | |
| 417 | /* |
| 418 | * Delete from old vnode list, if on one. |
| 419 | */ |
| 420 | if (LIST_NEXT(bp, b_vnbufs) != NOLIST) |
| 421 | bufremvn(bp); |
| 422 | |
| 423 | if (vp->v_uobj.uo_npages == 0 && (vp->v_iflag & VI_ONWORKLST) && |
| 424 | LIST_FIRST(&vp->v_dirtyblkhd) == NULL) { |
| 425 | vp->v_iflag &= ~VI_WRMAPDIRTY; |
| 426 | vn_syncer_remove_from_worklist(vp); |
| 427 | } |
| 428 | |
| 429 | bp->b_objlock = &buffer_lock; |
| 430 | bp->b_vp = NULL; |
| 431 | holdrelel(vp); |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Reassign a buffer from one vnode list to another. |
| 436 | * The list reassignment must be within the same vnode. |
| 437 | * Used to assign file specific control information |
| 438 | * (indirect blocks) to the list to which they belong. |
| 439 | */ |
| 440 | void |
| 441 | reassignbuf(struct buf *bp, struct vnode *vp) |
| 442 | { |
| 443 | struct buflists *listheadp; |
| 444 | int delayx; |
| 445 | |
| 446 | KASSERT(mutex_owned(&bufcache_lock)); |
| 447 | KASSERT(bp->b_objlock == vp->v_interlock); |
| 448 | KASSERT(mutex_owned(vp->v_interlock)); |
| 449 | KASSERT((bp->b_cflags & BC_BUSY) != 0); |
| 450 | |
| 451 | /* |
| 452 | * Delete from old vnode list, if on one. |
| 453 | */ |
| 454 | if (LIST_NEXT(bp, b_vnbufs) != NOLIST) |
| 455 | bufremvn(bp); |
| 456 | |
| 457 | /* |
| 458 | * If dirty, put on list of dirty buffers; |
| 459 | * otherwise insert onto list of clean buffers. |
| 460 | */ |
| 461 | if ((bp->b_oflags & BO_DELWRI) == 0) { |
| 462 | listheadp = &vp->v_cleanblkhd; |
| 463 | if (vp->v_uobj.uo_npages == 0 && |
| 464 | (vp->v_iflag & VI_ONWORKLST) && |
| 465 | LIST_FIRST(&vp->v_dirtyblkhd) == NULL) { |
| 466 | vp->v_iflag &= ~VI_WRMAPDIRTY; |
| 467 | vn_syncer_remove_from_worklist(vp); |
| 468 | } |
| 469 | } else { |
| 470 | listheadp = &vp->v_dirtyblkhd; |
| 471 | if ((vp->v_iflag & VI_ONWORKLST) == 0) { |
| 472 | switch (vp->v_type) { |
| 473 | case VDIR: |
| 474 | delayx = dirdelay; |
| 475 | break; |
| 476 | case VBLK: |
| 477 | if (spec_node_getmountedfs(vp) != NULL) { |
| 478 | delayx = metadelay; |
| 479 | break; |
| 480 | } |
| 481 | /* fall through */ |
| 482 | default: |
| 483 | delayx = filedelay; |
| 484 | break; |
| 485 | } |
| 486 | if (!vp->v_mount || |
| 487 | (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) |
| 488 | vn_syncer_add_to_worklist(vp, delayx); |
| 489 | } |
| 490 | } |
| 491 | bufinsvn(bp, listheadp); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Lookup a vnode by device number and return it referenced. |
| 496 | */ |
| 497 | int |
| 498 | vfinddev(dev_t dev, enum vtype type, vnode_t **vpp) |
| 499 | { |
| 500 | |
| 501 | return (spec_node_lookup_by_dev(type, dev, vpp) == 0); |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Revoke all the vnodes corresponding to the specified minor number |
| 506 | * range (endpoints inclusive) of the specified major. |
| 507 | */ |
| 508 | void |
| 509 | vdevgone(int maj, int minl, int minh, enum vtype type) |
| 510 | { |
| 511 | vnode_t *vp; |
| 512 | dev_t dev; |
| 513 | int mn; |
| 514 | |
| 515 | for (mn = minl; mn <= minh; mn++) { |
| 516 | dev = makedev(maj, mn); |
| 517 | while (spec_node_lookup_by_dev(type, dev, &vp) == 0) { |
| 518 | VOP_REVOKE(vp, REVOKEALL); |
| 519 | vrele(vp); |
| 520 | } |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * The filesystem synchronizer mechanism - syncer. |
| 526 | * |
| 527 | * It is useful to delay writes of file data and filesystem metadata for |
| 528 | * a certain amount of time so that quickly created and deleted files need |
| 529 | * not waste disk bandwidth being created and removed. To implement this, |
| 530 | * vnodes are appended to a "workitem" queue. |
| 531 | * |
| 532 | * Most pending metadata should not wait for more than ten seconds. Thus, |
| 533 | * mounted on block devices are delayed only about a half the time that file |
| 534 | * data is delayed. Similarly, directory updates are more critical, so are |
| 535 | * only delayed about a third the time that file data is delayed. |
| 536 | * |
| 537 | * There are SYNCER_MAXDELAY queues that are processed in a round-robin |
| 538 | * manner at a rate of one each second (driven off the filesystem syner |
| 539 | * thread). The syncer_delayno variable indicates the next queue that is |
| 540 | * to be processed. Items that need to be processed soon are placed in |
| 541 | * this queue: |
| 542 | * |
| 543 | * syncer_workitem_pending[syncer_delayno] |
| 544 | * |
| 545 | * A delay of e.g. fifteen seconds is done by placing the request fifteen |
| 546 | * entries later in the queue: |
| 547 | * |
| 548 | * syncer_workitem_pending[(syncer_delayno + 15) & syncer_mask] |
| 549 | * |
| 550 | * Flag VI_ONWORKLST indicates that vnode is added into the queue. |
| 551 | */ |
| 552 | |
| 553 | #define SYNCER_MAXDELAY 32 |
| 554 | |
| 555 | typedef TAILQ_HEAD(synclist, vnode) synclist_t; |
| 556 | |
| 557 | static void vn_syncer_add1(struct vnode *, int); |
| 558 | static void sysctl_vfs_syncfs_setup(struct sysctllog **); |
| 559 | |
| 560 | /* |
| 561 | * Defines and variables for the syncer process. |
| 562 | */ |
| 563 | int syncer_maxdelay = SYNCER_MAXDELAY; /* maximum delay time */ |
| 564 | time_t syncdelay = 30; /* max time to delay syncing data */ |
| 565 | time_t filedelay = 30; /* time to delay syncing files */ |
| 566 | time_t dirdelay = 15; /* time to delay syncing directories */ |
| 567 | time_t metadelay = 10; /* time to delay syncing metadata */ |
| 568 | time_t lockdelay = 1; /* time to delay if locking fails */ |
| 569 | |
| 570 | kmutex_t syncer_mutex; /* used to freeze syncer, long term */ |
| 571 | static kmutex_t syncer_data_lock; /* short term lock on data structs */ |
| 572 | |
| 573 | static int syncer_delayno = 0; |
| 574 | static long syncer_last; |
| 575 | static synclist_t * syncer_workitem_pending; |
| 576 | |
| 577 | static void |
| 578 | vn_initialize_syncerd(void) |
| 579 | { |
| 580 | int i; |
| 581 | |
| 582 | syncer_last = SYNCER_MAXDELAY + 2; |
| 583 | |
| 584 | sysctl_vfs_syncfs_setup(NULL); |
| 585 | |
| 586 | syncer_workitem_pending = |
| 587 | kmem_alloc(syncer_last * sizeof (struct synclist), KM_SLEEP); |
| 588 | |
| 589 | for (i = 0; i < syncer_last; i++) |
| 590 | TAILQ_INIT(&syncer_workitem_pending[i]); |
| 591 | |
| 592 | mutex_init(&syncer_mutex, MUTEX_DEFAULT, IPL_NONE); |
| 593 | mutex_init(&syncer_data_lock, MUTEX_DEFAULT, IPL_NONE); |
| 594 | } |
| 595 | |
| 596 | /* |
| 597 | * Return delay factor appropriate for the given file system. For |
| 598 | * WAPBL we use the sync vnode to burst out metadata updates: sync |
| 599 | * those file systems more frequently. |
| 600 | */ |
| 601 | static inline int |
| 602 | sync_delay(struct mount *mp) |
| 603 | { |
| 604 | |
| 605 | return mp->mnt_wapbl != NULL ? metadelay : syncdelay; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * Compute the next slot index from delay. |
| 610 | */ |
| 611 | static inline int |
| 612 | sync_delay_slot(int delayx) |
| 613 | { |
| 614 | |
| 615 | if (delayx > syncer_maxdelay - 2) |
| 616 | delayx = syncer_maxdelay - 2; |
| 617 | return (syncer_delayno + delayx) % syncer_last; |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * Add an item to the syncer work queue. |
| 622 | */ |
| 623 | static void |
| 624 | vn_syncer_add1(struct vnode *vp, int delayx) |
| 625 | { |
| 626 | synclist_t *slp; |
| 627 | |
| 628 | KASSERT(mutex_owned(&syncer_data_lock)); |
| 629 | |
| 630 | if (vp->v_iflag & VI_ONWORKLST) { |
| 631 | /* |
| 632 | * Remove in order to adjust the position of the vnode. |
| 633 | * Note: called from sched_sync(), which will not hold |
| 634 | * interlock, therefore we cannot modify v_iflag here. |
| 635 | */ |
| 636 | slp = &syncer_workitem_pending[vp->v_synclist_slot]; |
| 637 | TAILQ_REMOVE(slp, vp, v_synclist); |
| 638 | } else { |
| 639 | KASSERT(mutex_owned(vp->v_interlock)); |
| 640 | vp->v_iflag |= VI_ONWORKLST; |
| 641 | } |
| 642 | |
| 643 | vp->v_synclist_slot = sync_delay_slot(delayx); |
| 644 | |
| 645 | slp = &syncer_workitem_pending[vp->v_synclist_slot]; |
| 646 | TAILQ_INSERT_TAIL(slp, vp, v_synclist); |
| 647 | } |
| 648 | |
| 649 | void |
| 650 | vn_syncer_add_to_worklist(struct vnode *vp, int delayx) |
| 651 | { |
| 652 | |
| 653 | KASSERT(mutex_owned(vp->v_interlock)); |
| 654 | |
| 655 | mutex_enter(&syncer_data_lock); |
| 656 | vn_syncer_add1(vp, delayx); |
| 657 | mutex_exit(&syncer_data_lock); |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * Remove an item from the syncer work queue. |
| 662 | */ |
| 663 | void |
| 664 | vn_syncer_remove_from_worklist(struct vnode *vp) |
| 665 | { |
| 666 | synclist_t *slp; |
| 667 | |
| 668 | KASSERT(mutex_owned(vp->v_interlock)); |
| 669 | |
| 670 | mutex_enter(&syncer_data_lock); |
| 671 | if (vp->v_iflag & VI_ONWORKLST) { |
| 672 | vp->v_iflag &= ~VI_ONWORKLST; |
| 673 | slp = &syncer_workitem_pending[vp->v_synclist_slot]; |
| 674 | TAILQ_REMOVE(slp, vp, v_synclist); |
| 675 | } |
| 676 | mutex_exit(&syncer_data_lock); |
| 677 | } |
| 678 | |
| 679 | /* |
| 680 | * Add this mount point to the syncer. |
| 681 | */ |
| 682 | void |
| 683 | vfs_syncer_add_to_worklist(struct mount *mp) |
| 684 | { |
| 685 | static int start, incr, next; |
| 686 | int vdelay; |
| 687 | |
| 688 | KASSERT(mutex_owned(&mp->mnt_updating)); |
| 689 | KASSERT((mp->mnt_iflag & IMNT_ONWORKLIST) == 0); |
| 690 | |
| 691 | /* |
| 692 | * We attempt to scatter the mount points on the list |
| 693 | * so that they will go off at evenly distributed times |
| 694 | * even if all the filesystems are mounted at once. |
| 695 | */ |
| 696 | |
| 697 | next += incr; |
| 698 | if (next == 0 || next > syncer_maxdelay) { |
| 699 | start /= 2; |
| 700 | incr /= 2; |
| 701 | if (start == 0) { |
| 702 | start = syncer_maxdelay / 2; |
| 703 | incr = syncer_maxdelay; |
| 704 | } |
| 705 | next = start; |
| 706 | } |
| 707 | mp->mnt_iflag |= IMNT_ONWORKLIST; |
| 708 | vdelay = sync_delay(mp); |
| 709 | mp->mnt_synclist_slot = vdelay > 0 ? next % vdelay : 0; |
| 710 | } |
| 711 | |
| 712 | /* |
| 713 | * Remove the mount point from the syncer. |
| 714 | */ |
| 715 | void |
| 716 | vfs_syncer_remove_from_worklist(struct mount *mp) |
| 717 | { |
| 718 | |
| 719 | KASSERT(mutex_owned(&mp->mnt_updating)); |
| 720 | KASSERT((mp->mnt_iflag & IMNT_ONWORKLIST) != 0); |
| 721 | |
| 722 | mp->mnt_iflag &= ~IMNT_ONWORKLIST; |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Try lazy sync, return true on success. |
| 727 | */ |
| 728 | static bool |
| 729 | lazy_sync_vnode(struct vnode *vp) |
| 730 | { |
| 731 | bool synced; |
| 732 | |
| 733 | KASSERT(mutex_owned(&syncer_data_lock)); |
| 734 | |
| 735 | synced = false; |
| 736 | /* We are locking in the wrong direction. */ |
| 737 | if (mutex_tryenter(vp->v_interlock)) { |
| 738 | mutex_exit(&syncer_data_lock); |
| 739 | if (vget(vp, LK_NOWAIT, false /* !wait */) == 0) { |
| 740 | if (vn_lock(vp, LK_EXCLUSIVE | LK_NOWAIT) == 0) { |
| 741 | synced = true; |
| 742 | (void) VOP_FSYNC(vp, curlwp->l_cred, |
| 743 | FSYNC_LAZY, 0, 0); |
| 744 | vput(vp); |
| 745 | } else |
| 746 | vrele(vp); |
| 747 | } |
| 748 | mutex_enter(&syncer_data_lock); |
| 749 | } |
| 750 | return synced; |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * System filesystem synchronizer daemon. |
| 755 | */ |
| 756 | void |
| 757 | sched_sync(void *arg) |
| 758 | { |
| 759 | synclist_t *slp; |
| 760 | struct vnode *vp; |
| 761 | struct mount *mp, *nmp; |
| 762 | time_t starttime; |
| 763 | bool synced; |
| 764 | |
| 765 | for (;;) { |
| 766 | mutex_enter(&syncer_mutex); |
| 767 | |
| 768 | starttime = time_second; |
| 769 | |
| 770 | /* |
| 771 | * Sync mounts whose dirty time has expired. |
| 772 | */ |
| 773 | mutex_enter(&mountlist_lock); |
| 774 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
| 775 | if ((mp->mnt_iflag & IMNT_ONWORKLIST) == 0 || |
| 776 | mp->mnt_synclist_slot != syncer_delayno) { |
| 777 | nmp = TAILQ_NEXT(mp, mnt_list); |
| 778 | continue; |
| 779 | } |
| 780 | mp->mnt_synclist_slot = sync_delay_slot(sync_delay(mp)); |
| 781 | if (vfs_busy(mp, &nmp)) |
| 782 | continue; |
| 783 | VFS_SYNC(mp, MNT_LAZY, curlwp->l_cred); |
| 784 | vfs_unbusy(mp, false, &nmp); |
| 785 | } |
| 786 | mutex_exit(&mountlist_lock); |
| 787 | |
| 788 | mutex_enter(&syncer_data_lock); |
| 789 | |
| 790 | /* |
| 791 | * Push files whose dirty time has expired. |
| 792 | */ |
| 793 | slp = &syncer_workitem_pending[syncer_delayno]; |
| 794 | syncer_delayno += 1; |
| 795 | if (syncer_delayno >= syncer_last) |
| 796 | syncer_delayno = 0; |
| 797 | |
| 798 | while ((vp = TAILQ_FIRST(slp)) != NULL) { |
| 799 | synced = lazy_sync_vnode(vp); |
| 800 | |
| 801 | /* |
| 802 | * XXX The vnode may have been recycled, in which |
| 803 | * case it may have a new identity. |
| 804 | */ |
| 805 | if (TAILQ_FIRST(slp) == vp) { |
| 806 | /* |
| 807 | * Put us back on the worklist. The worklist |
| 808 | * routine will remove us from our current |
| 809 | * position and then add us back in at a later |
| 810 | * position. |
| 811 | * |
| 812 | * Try again sooner rather than later if |
| 813 | * we were unable to lock the vnode. Lock |
| 814 | * failure should not prevent us from doing |
| 815 | * the sync "soon". |
| 816 | * |
| 817 | * If we locked it yet arrive here, it's |
| 818 | * likely that lazy sync is in progress and |
| 819 | * so the vnode still has dirty metadata. |
| 820 | * syncdelay is mainly to get this vnode out |
| 821 | * of the way so we do not consider it again |
| 822 | * "soon" in this loop, so the delay time is |
| 823 | * not critical as long as it is not "soon". |
| 824 | * While write-back strategy is the file |
| 825 | * system's domain, we expect write-back to |
| 826 | * occur no later than syncdelay seconds |
| 827 | * into the future. |
| 828 | */ |
| 829 | vn_syncer_add1(vp, |
| 830 | synced ? syncdelay : lockdelay); |
| 831 | } |
| 832 | } |
| 833 | mutex_exit(&syncer_mutex); |
| 834 | |
| 835 | /* |
| 836 | * If it has taken us less than a second to process the |
| 837 | * current work, then wait. Otherwise start right over |
| 838 | * again. We can still lose time if any single round |
| 839 | * takes more than two seconds, but it does not really |
| 840 | * matter as we are just trying to generally pace the |
| 841 | * filesystem activity. |
| 842 | */ |
| 843 | if (time_second == starttime) { |
| 844 | kpause("syncer" , false, hz, &syncer_data_lock); |
| 845 | } |
| 846 | mutex_exit(&syncer_data_lock); |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | static void |
| 851 | sysctl_vfs_syncfs_setup(struct sysctllog **clog) |
| 852 | { |
| 853 | const struct sysctlnode *rnode, *cnode; |
| 854 | |
| 855 | sysctl_createv(clog, 0, NULL, &rnode, |
| 856 | CTLFLAG_PERMANENT, |
| 857 | CTLTYPE_NODE, "sync" , |
| 858 | SYSCTL_DESCR("syncer options" ), |
| 859 | NULL, 0, NULL, 0, |
| 860 | CTL_VFS, CTL_CREATE, CTL_EOL); |
| 861 | |
| 862 | sysctl_createv(clog, 0, &rnode, &cnode, |
| 863 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 864 | CTLTYPE_QUAD, "delay" , |
| 865 | SYSCTL_DESCR("max time to delay syncing data" ), |
| 866 | NULL, 0, &syncdelay, 0, |
| 867 | CTL_CREATE, CTL_EOL); |
| 868 | |
| 869 | sysctl_createv(clog, 0, &rnode, &cnode, |
| 870 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 871 | CTLTYPE_QUAD, "filedelay" , |
| 872 | SYSCTL_DESCR("time to delay syncing files" ), |
| 873 | NULL, 0, &filedelay, 0, |
| 874 | CTL_CREATE, CTL_EOL); |
| 875 | |
| 876 | sysctl_createv(clog, 0, &rnode, &cnode, |
| 877 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 878 | CTLTYPE_QUAD, "dirdelay" , |
| 879 | SYSCTL_DESCR("time to delay syncing directories" ), |
| 880 | NULL, 0, &dirdelay, 0, |
| 881 | CTL_CREATE, CTL_EOL); |
| 882 | |
| 883 | sysctl_createv(clog, 0, &rnode, &cnode, |
| 884 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 885 | CTLTYPE_QUAD, "metadelay" , |
| 886 | SYSCTL_DESCR("time to delay syncing metadata" ), |
| 887 | NULL, 0, &metadelay, 0, |
| 888 | CTL_CREATE, CTL_EOL); |
| 889 | } |
| 890 | |
| 891 | /* |
| 892 | * sysctl helper routine to return list of supported fstypes |
| 893 | */ |
| 894 | int |
| 895 | sysctl_vfs_generic_fstypes(SYSCTLFN_ARGS) |
| 896 | { |
| 897 | char bf[sizeof(((struct statvfs *)NULL)->f_fstypename)]; |
| 898 | char *where = oldp; |
| 899 | struct vfsops *v; |
| 900 | size_t needed, left, slen; |
| 901 | int error, first; |
| 902 | |
| 903 | if (newp != NULL) |
| 904 | return (EPERM); |
| 905 | if (namelen != 0) |
| 906 | return (EINVAL); |
| 907 | |
| 908 | first = 1; |
| 909 | error = 0; |
| 910 | needed = 0; |
| 911 | left = *oldlenp; |
| 912 | |
| 913 | sysctl_unlock(); |
| 914 | mutex_enter(&vfs_list_lock); |
| 915 | LIST_FOREACH(v, &vfs_list, vfs_list) { |
| 916 | if (where == NULL) |
| 917 | needed += strlen(v->vfs_name) + 1; |
| 918 | else { |
| 919 | memset(bf, 0, sizeof(bf)); |
| 920 | if (first) { |
| 921 | strncpy(bf, v->vfs_name, sizeof(bf)); |
| 922 | first = 0; |
| 923 | } else { |
| 924 | bf[0] = ' '; |
| 925 | strncpy(bf + 1, v->vfs_name, sizeof(bf) - 1); |
| 926 | } |
| 927 | bf[sizeof(bf)-1] = '\0'; |
| 928 | slen = strlen(bf); |
| 929 | if (left < slen + 1) |
| 930 | break; |
| 931 | v->vfs_refcount++; |
| 932 | mutex_exit(&vfs_list_lock); |
| 933 | /* +1 to copy out the trailing NUL byte */ |
| 934 | error = copyout(bf, where, slen + 1); |
| 935 | mutex_enter(&vfs_list_lock); |
| 936 | v->vfs_refcount--; |
| 937 | if (error) |
| 938 | break; |
| 939 | where += slen; |
| 940 | needed += slen; |
| 941 | left -= slen; |
| 942 | } |
| 943 | } |
| 944 | mutex_exit(&vfs_list_lock); |
| 945 | sysctl_relock(); |
| 946 | *oldlenp = needed; |
| 947 | return (error); |
| 948 | } |
| 949 | |
| 950 | int kinfo_vdebug = 1; |
| 951 | int kinfo_vgetfailed; |
| 952 | |
| 953 | #define KINFO_VNODESLOP 10 |
| 954 | |
| 955 | /* |
| 956 | * Dump vnode list (via sysctl). |
| 957 | * Copyout address of vnode followed by vnode. |
| 958 | */ |
| 959 | int |
| 960 | sysctl_kern_vnode(SYSCTLFN_ARGS) |
| 961 | { |
| 962 | char *where = oldp; |
| 963 | size_t *sizep = oldlenp; |
| 964 | struct mount *mp, *nmp; |
| 965 | vnode_t *vp, vbuf; |
| 966 | struct vnode_iterator *marker; |
| 967 | char *bp = where; |
| 968 | char *ewhere; |
| 969 | int error; |
| 970 | |
| 971 | if (namelen != 0) |
| 972 | return (EOPNOTSUPP); |
| 973 | if (newp != NULL) |
| 974 | return (EPERM); |
| 975 | |
| 976 | #define VPTRSZ sizeof(vnode_t *) |
| 977 | #define VNODESZ sizeof(vnode_t) |
| 978 | if (where == NULL) { |
| 979 | *sizep = (numvnodes + KINFO_VNODESLOP) * (VPTRSZ + VNODESZ); |
| 980 | return (0); |
| 981 | } |
| 982 | ewhere = where + *sizep; |
| 983 | |
| 984 | sysctl_unlock(); |
| 985 | mutex_enter(&mountlist_lock); |
| 986 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
| 987 | if (vfs_busy(mp, &nmp)) { |
| 988 | continue; |
| 989 | } |
| 990 | vfs_vnode_iterator_init(mp, &marker); |
| 991 | while ((vp = vfs_vnode_iterator_next(marker, NULL, NULL))) { |
| 992 | if (bp + VPTRSZ + VNODESZ > ewhere) { |
| 993 | vrele(vp); |
| 994 | vfs_vnode_iterator_destroy(marker); |
| 995 | vfs_unbusy(mp, false, NULL); |
| 996 | sysctl_relock(); |
| 997 | *sizep = bp - where; |
| 998 | return (ENOMEM); |
| 999 | } |
| 1000 | memcpy(&vbuf, vp, VNODESZ); |
| 1001 | if ((error = copyout(&vp, bp, VPTRSZ)) || |
| 1002 | (error = copyout(&vbuf, bp + VPTRSZ, VNODESZ))) { |
| 1003 | vrele(vp); |
| 1004 | vfs_vnode_iterator_destroy(marker); |
| 1005 | vfs_unbusy(mp, false, NULL); |
| 1006 | sysctl_relock(); |
| 1007 | return (error); |
| 1008 | } |
| 1009 | vrele(vp); |
| 1010 | bp += VPTRSZ + VNODESZ; |
| 1011 | } |
| 1012 | vfs_vnode_iterator_destroy(marker); |
| 1013 | vfs_unbusy(mp, false, &nmp); |
| 1014 | } |
| 1015 | mutex_exit(&mountlist_lock); |
| 1016 | sysctl_relock(); |
| 1017 | |
| 1018 | *sizep = bp - where; |
| 1019 | return (0); |
| 1020 | } |
| 1021 | |
| 1022 | /* |
| 1023 | * Set vnode attributes to VNOVAL |
| 1024 | */ |
| 1025 | void |
| 1026 | vattr_null(struct vattr *vap) |
| 1027 | { |
| 1028 | |
| 1029 | memset(vap, 0, sizeof(*vap)); |
| 1030 | |
| 1031 | vap->va_type = VNON; |
| 1032 | |
| 1033 | /* |
| 1034 | * Assign individually so that it is safe even if size and |
| 1035 | * sign of each member are varied. |
| 1036 | */ |
| 1037 | vap->va_mode = VNOVAL; |
| 1038 | vap->va_nlink = VNOVAL; |
| 1039 | vap->va_uid = VNOVAL; |
| 1040 | vap->va_gid = VNOVAL; |
| 1041 | vap->va_fsid = VNOVAL; |
| 1042 | vap->va_fileid = VNOVAL; |
| 1043 | vap->va_size = VNOVAL; |
| 1044 | vap->va_blocksize = VNOVAL; |
| 1045 | vap->va_atime.tv_sec = |
| 1046 | vap->va_mtime.tv_sec = |
| 1047 | vap->va_ctime.tv_sec = |
| 1048 | vap->va_birthtime.tv_sec = VNOVAL; |
| 1049 | vap->va_atime.tv_nsec = |
| 1050 | vap->va_mtime.tv_nsec = |
| 1051 | vap->va_ctime.tv_nsec = |
| 1052 | vap->va_birthtime.tv_nsec = VNOVAL; |
| 1053 | vap->va_gen = VNOVAL; |
| 1054 | vap->va_flags = VNOVAL; |
| 1055 | vap->va_rdev = VNOVAL; |
| 1056 | vap->va_bytes = VNOVAL; |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * Vnode state to string. |
| 1061 | */ |
| 1062 | const char * |
| 1063 | vstate_name(enum vnode_state state) |
| 1064 | { |
| 1065 | |
| 1066 | switch (state) { |
| 1067 | case VS_MARKER: |
| 1068 | return "MARKER" ; |
| 1069 | case VS_LOADING: |
| 1070 | return "LOADING" ; |
| 1071 | case VS_ACTIVE: |
| 1072 | return "ACTIVE" ; |
| 1073 | case VS_BLOCKED: |
| 1074 | return "BLOCKED" ; |
| 1075 | case VS_RECLAIMING: |
| 1076 | return "RECLAIMING" ; |
| 1077 | case VS_RECLAIMED: |
| 1078 | return "RECLAIMED" ; |
| 1079 | default: |
| 1080 | return "ILLEGAL" ; |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | /* |
| 1085 | * Print a description of a vnode (common part). |
| 1086 | */ |
| 1087 | static void |
| 1088 | vprint_common(struct vnode *vp, const char *prefix, |
| 1089 | void (*pr)(const char *, ...) __printflike(1, 2)) |
| 1090 | { |
| 1091 | int n; |
| 1092 | char bf[96]; |
| 1093 | const uint8_t *cp; |
| 1094 | vnode_impl_t *node; |
| 1095 | const char * const vnode_tags[] = { VNODE_TAGS }; |
| 1096 | const char * const vnode_types[] = { VNODE_TYPES }; |
| 1097 | const char vnode_flagbits[] = VNODE_FLAGBITS; |
| 1098 | |
| 1099 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0])) |
| 1100 | #define ARRAY_PRINT(idx, arr) \ |
| 1101 | ((unsigned int)(idx) < ARRAY_SIZE(arr) ? (arr)[(idx)] : "UNKNOWN") |
| 1102 | |
| 1103 | node = VNODE_TO_VIMPL(vp); |
| 1104 | |
| 1105 | snprintb(bf, sizeof(bf), |
| 1106 | vnode_flagbits, vp->v_iflag | vp->v_vflag | vp->v_uflag); |
| 1107 | |
| 1108 | (*pr)("vnode %p flags %s\n" , vp, bf); |
| 1109 | (*pr)("%stag %s(%d) type %s(%d) mount %p typedata %p\n" , prefix, |
| 1110 | ARRAY_PRINT(vp->v_tag, vnode_tags), vp->v_tag, |
| 1111 | ARRAY_PRINT(vp->v_type, vnode_types), vp->v_type, |
| 1112 | vp->v_mount, vp->v_mountedhere); |
| 1113 | (*pr)("%susecount %d writecount %d holdcount %d\n" , prefix, |
| 1114 | vp->v_usecount, vp->v_writecount, vp->v_holdcnt); |
| 1115 | (*pr)("%ssize %" PRIx64 " writesize %" PRIx64 " numoutput %d\n" , |
| 1116 | prefix, vp->v_size, vp->v_writesize, vp->v_numoutput); |
| 1117 | (*pr)("%sfreelisthd %p data %p lock %p\n" , prefix, |
| 1118 | vp->v_freelisthd, vp->v_data, &vp->v_lock); |
| 1119 | |
| 1120 | (*pr)("%sstate %s key(%p %zd)" , prefix, vstate_name(node->vi_state), |
| 1121 | node->vi_key.vk_mount, node->vi_key.vk_key_len); |
| 1122 | n = node->vi_key.vk_key_len; |
| 1123 | cp = node->vi_key.vk_key; |
| 1124 | while (n-- > 0) |
| 1125 | (*pr)(" %02x" , *cp++); |
| 1126 | (*pr)("\n" ); |
| 1127 | |
| 1128 | #undef ARRAY_PRINT |
| 1129 | #undef ARRAY_SIZE |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * Print out a description of a vnode. |
| 1134 | */ |
| 1135 | void |
| 1136 | vprint(const char *label, struct vnode *vp) |
| 1137 | { |
| 1138 | |
| 1139 | if (label != NULL) |
| 1140 | printf("%s: " , label); |
| 1141 | vprint_common(vp, "\t" , printf); |
| 1142 | if (vp->v_data != NULL) { |
| 1143 | printf("\t" ); |
| 1144 | VOP_PRINT(vp); |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | /* Deprecated. Kept for KPI compatibility. */ |
| 1149 | int |
| 1150 | vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid, |
| 1151 | mode_t acc_mode, kauth_cred_t cred) |
| 1152 | { |
| 1153 | |
| 1154 | #ifdef DIAGNOSTIC |
| 1155 | printf("vaccess: deprecated interface used.\n" ); |
| 1156 | #endif /* DIAGNOSTIC */ |
| 1157 | |
| 1158 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(acc_mode, |
| 1159 | type, file_mode), NULL /* This may panic. */, NULL, |
| 1160 | genfs_can_access(type, file_mode, uid, gid, acc_mode, cred)); |
| 1161 | } |
| 1162 | |
| 1163 | /* |
| 1164 | * Given a file system name, look up the vfsops for that |
| 1165 | * file system, or return NULL if file system isn't present |
| 1166 | * in the kernel. |
| 1167 | */ |
| 1168 | struct vfsops * |
| 1169 | vfs_getopsbyname(const char *name) |
| 1170 | { |
| 1171 | struct vfsops *v; |
| 1172 | |
| 1173 | mutex_enter(&vfs_list_lock); |
| 1174 | LIST_FOREACH(v, &vfs_list, vfs_list) { |
| 1175 | if (strcmp(v->vfs_name, name) == 0) |
| 1176 | break; |
| 1177 | } |
| 1178 | if (v != NULL) |
| 1179 | v->vfs_refcount++; |
| 1180 | mutex_exit(&vfs_list_lock); |
| 1181 | |
| 1182 | return (v); |
| 1183 | } |
| 1184 | |
| 1185 | void |
| 1186 | copy_statvfs_info(struct statvfs *sbp, const struct mount *mp) |
| 1187 | { |
| 1188 | const struct statvfs *mbp; |
| 1189 | |
| 1190 | if (sbp == (mbp = &mp->mnt_stat)) |
| 1191 | return; |
| 1192 | |
| 1193 | (void)memcpy(&sbp->f_fsidx, &mbp->f_fsidx, sizeof(sbp->f_fsidx)); |
| 1194 | sbp->f_fsid = mbp->f_fsid; |
| 1195 | sbp->f_owner = mbp->f_owner; |
| 1196 | sbp->f_flag = mbp->f_flag; |
| 1197 | sbp->f_syncwrites = mbp->f_syncwrites; |
| 1198 | sbp->f_asyncwrites = mbp->f_asyncwrites; |
| 1199 | sbp->f_syncreads = mbp->f_syncreads; |
| 1200 | sbp->f_asyncreads = mbp->f_asyncreads; |
| 1201 | (void)memcpy(sbp->f_spare, mbp->f_spare, sizeof(mbp->f_spare)); |
| 1202 | (void)memcpy(sbp->f_fstypename, mbp->f_fstypename, |
| 1203 | sizeof(sbp->f_fstypename)); |
| 1204 | (void)memcpy(sbp->f_mntonname, mbp->f_mntonname, |
| 1205 | sizeof(sbp->f_mntonname)); |
| 1206 | (void)memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, |
| 1207 | sizeof(sbp->f_mntfromname)); |
| 1208 | sbp->f_namemax = mbp->f_namemax; |
| 1209 | } |
| 1210 | |
| 1211 | int |
| 1212 | set_statvfs_info(const char *onp, int ukon, const char *fromp, int ukfrom, |
| 1213 | const char *vfsname, struct mount *mp, struct lwp *l) |
| 1214 | { |
| 1215 | int error; |
| 1216 | size_t size; |
| 1217 | struct statvfs *sfs = &mp->mnt_stat; |
| 1218 | int (*fun)(const void *, void *, size_t, size_t *); |
| 1219 | |
| 1220 | (void)strlcpy(mp->mnt_stat.f_fstypename, vfsname, |
| 1221 | sizeof(mp->mnt_stat.f_fstypename)); |
| 1222 | |
| 1223 | if (onp) { |
| 1224 | struct cwdinfo *cwdi = l->l_proc->p_cwdi; |
| 1225 | fun = (ukon == UIO_SYSSPACE) ? copystr : copyinstr; |
| 1226 | if (cwdi->cwdi_rdir != NULL) { |
| 1227 | size_t len; |
| 1228 | char *bp; |
| 1229 | char *path = PNBUF_GET(); |
| 1230 | |
| 1231 | bp = path + MAXPATHLEN; |
| 1232 | *--bp = '\0'; |
| 1233 | rw_enter(&cwdi->cwdi_lock, RW_READER); |
| 1234 | error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, |
| 1235 | path, MAXPATHLEN / 2, 0, l); |
| 1236 | rw_exit(&cwdi->cwdi_lock); |
| 1237 | if (error) { |
| 1238 | PNBUF_PUT(path); |
| 1239 | return error; |
| 1240 | } |
| 1241 | |
| 1242 | len = strlen(bp); |
| 1243 | if (len > sizeof(sfs->f_mntonname) - 1) |
| 1244 | len = sizeof(sfs->f_mntonname) - 1; |
| 1245 | (void)strncpy(sfs->f_mntonname, bp, len); |
| 1246 | PNBUF_PUT(path); |
| 1247 | |
| 1248 | if (len < sizeof(sfs->f_mntonname) - 1) { |
| 1249 | error = (*fun)(onp, &sfs->f_mntonname[len], |
| 1250 | sizeof(sfs->f_mntonname) - len - 1, &size); |
| 1251 | if (error) |
| 1252 | return error; |
| 1253 | size += len; |
| 1254 | } else { |
| 1255 | size = len; |
| 1256 | } |
| 1257 | } else { |
| 1258 | error = (*fun)(onp, &sfs->f_mntonname, |
| 1259 | sizeof(sfs->f_mntonname) - 1, &size); |
| 1260 | if (error) |
| 1261 | return error; |
| 1262 | } |
| 1263 | (void)memset(sfs->f_mntonname + size, 0, |
| 1264 | sizeof(sfs->f_mntonname) - size); |
| 1265 | } |
| 1266 | |
| 1267 | if (fromp) { |
| 1268 | fun = (ukfrom == UIO_SYSSPACE) ? copystr : copyinstr; |
| 1269 | error = (*fun)(fromp, sfs->f_mntfromname, |
| 1270 | sizeof(sfs->f_mntfromname) - 1, &size); |
| 1271 | if (error) |
| 1272 | return error; |
| 1273 | (void)memset(sfs->f_mntfromname + size, 0, |
| 1274 | sizeof(sfs->f_mntfromname) - size); |
| 1275 | } |
| 1276 | return 0; |
| 1277 | } |
| 1278 | |
| 1279 | void |
| 1280 | vfs_timestamp(struct timespec *ts) |
| 1281 | { |
| 1282 | |
| 1283 | nanotime(ts); |
| 1284 | } |
| 1285 | |
| 1286 | time_t rootfstime; /* recorded root fs time, if known */ |
| 1287 | void |
| 1288 | setrootfstime(time_t t) |
| 1289 | { |
| 1290 | rootfstime = t; |
| 1291 | } |
| 1292 | |
| 1293 | static const uint8_t vttodt_tab[ ] = { |
| 1294 | [VNON] = DT_UNKNOWN, |
| 1295 | [VREG] = DT_REG, |
| 1296 | [VDIR] = DT_DIR, |
| 1297 | [VBLK] = DT_BLK, |
| 1298 | [VCHR] = DT_CHR, |
| 1299 | [VLNK] = DT_LNK, |
| 1300 | [VSOCK] = DT_SOCK, |
| 1301 | [VFIFO] = DT_FIFO, |
| 1302 | [VBAD] = DT_UNKNOWN |
| 1303 | }; |
| 1304 | |
| 1305 | uint8_t |
| 1306 | vtype2dt(enum vtype vt) |
| 1307 | { |
| 1308 | |
| 1309 | CTASSERT(VBAD == __arraycount(vttodt_tab) - 1); |
| 1310 | return vttodt_tab[vt]; |
| 1311 | } |
| 1312 | |
| 1313 | int |
| 1314 | VFS_MOUNT(struct mount *mp, const char *a, void *b, size_t *c) |
| 1315 | { |
| 1316 | int error; |
| 1317 | |
| 1318 | KERNEL_LOCK(1, NULL); |
| 1319 | error = (*(mp->mnt_op->vfs_mount))(mp, a, b, c); |
| 1320 | KERNEL_UNLOCK_ONE(NULL); |
| 1321 | |
| 1322 | return error; |
| 1323 | } |
| 1324 | |
| 1325 | int |
| 1326 | VFS_START(struct mount *mp, int a) |
| 1327 | { |
| 1328 | int error; |
| 1329 | |
| 1330 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1331 | KERNEL_LOCK(1, NULL); |
| 1332 | } |
| 1333 | error = (*(mp->mnt_op->vfs_start))(mp, a); |
| 1334 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1335 | KERNEL_UNLOCK_ONE(NULL); |
| 1336 | } |
| 1337 | |
| 1338 | return error; |
| 1339 | } |
| 1340 | |
| 1341 | int |
| 1342 | VFS_UNMOUNT(struct mount *mp, int a) |
| 1343 | { |
| 1344 | int error; |
| 1345 | |
| 1346 | KERNEL_LOCK(1, NULL); |
| 1347 | error = (*(mp->mnt_op->vfs_unmount))(mp, a); |
| 1348 | KERNEL_UNLOCK_ONE(NULL); |
| 1349 | |
| 1350 | return error; |
| 1351 | } |
| 1352 | |
| 1353 | int |
| 1354 | VFS_ROOT(struct mount *mp, struct vnode **a) |
| 1355 | { |
| 1356 | int error; |
| 1357 | |
| 1358 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1359 | KERNEL_LOCK(1, NULL); |
| 1360 | } |
| 1361 | error = (*(mp->mnt_op->vfs_root))(mp, a); |
| 1362 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1363 | KERNEL_UNLOCK_ONE(NULL); |
| 1364 | } |
| 1365 | |
| 1366 | return error; |
| 1367 | } |
| 1368 | |
| 1369 | int |
| 1370 | VFS_QUOTACTL(struct mount *mp, struct quotactl_args *args) |
| 1371 | { |
| 1372 | int error; |
| 1373 | |
| 1374 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1375 | KERNEL_LOCK(1, NULL); |
| 1376 | } |
| 1377 | error = (*(mp->mnt_op->vfs_quotactl))(mp, args); |
| 1378 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1379 | KERNEL_UNLOCK_ONE(NULL); |
| 1380 | } |
| 1381 | |
| 1382 | return error; |
| 1383 | } |
| 1384 | |
| 1385 | int |
| 1386 | VFS_STATVFS(struct mount *mp, struct statvfs *a) |
| 1387 | { |
| 1388 | int error; |
| 1389 | |
| 1390 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1391 | KERNEL_LOCK(1, NULL); |
| 1392 | } |
| 1393 | error = (*(mp->mnt_op->vfs_statvfs))(mp, a); |
| 1394 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1395 | KERNEL_UNLOCK_ONE(NULL); |
| 1396 | } |
| 1397 | |
| 1398 | return error; |
| 1399 | } |
| 1400 | |
| 1401 | int |
| 1402 | VFS_SYNC(struct mount *mp, int a, struct kauth_cred *b) |
| 1403 | { |
| 1404 | int error; |
| 1405 | |
| 1406 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1407 | KERNEL_LOCK(1, NULL); |
| 1408 | } |
| 1409 | error = (*(mp->mnt_op->vfs_sync))(mp, a, b); |
| 1410 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1411 | KERNEL_UNLOCK_ONE(NULL); |
| 1412 | } |
| 1413 | |
| 1414 | return error; |
| 1415 | } |
| 1416 | |
| 1417 | int |
| 1418 | VFS_FHTOVP(struct mount *mp, struct fid *a, struct vnode **b) |
| 1419 | { |
| 1420 | int error; |
| 1421 | |
| 1422 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1423 | KERNEL_LOCK(1, NULL); |
| 1424 | } |
| 1425 | error = (*(mp->mnt_op->vfs_fhtovp))(mp, a, b); |
| 1426 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1427 | KERNEL_UNLOCK_ONE(NULL); |
| 1428 | } |
| 1429 | |
| 1430 | return error; |
| 1431 | } |
| 1432 | |
| 1433 | int |
| 1434 | VFS_VPTOFH(struct vnode *vp, struct fid *a, size_t *b) |
| 1435 | { |
| 1436 | int error; |
| 1437 | |
| 1438 | if ((vp->v_vflag & VV_MPSAFE) == 0) { |
| 1439 | KERNEL_LOCK(1, NULL); |
| 1440 | } |
| 1441 | error = (*(vp->v_mount->mnt_op->vfs_vptofh))(vp, a, b); |
| 1442 | if ((vp->v_vflag & VV_MPSAFE) == 0) { |
| 1443 | KERNEL_UNLOCK_ONE(NULL); |
| 1444 | } |
| 1445 | |
| 1446 | return error; |
| 1447 | } |
| 1448 | |
| 1449 | int |
| 1450 | VFS_SNAPSHOT(struct mount *mp, struct vnode *a, struct timespec *b) |
| 1451 | { |
| 1452 | int error; |
| 1453 | |
| 1454 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1455 | KERNEL_LOCK(1, NULL); |
| 1456 | } |
| 1457 | error = (*(mp->mnt_op->vfs_snapshot))(mp, a, b); |
| 1458 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1459 | KERNEL_UNLOCK_ONE(NULL); |
| 1460 | } |
| 1461 | |
| 1462 | return error; |
| 1463 | } |
| 1464 | |
| 1465 | int |
| 1466 | VFS_EXTATTRCTL(struct mount *mp, int a, struct vnode *b, int c, const char *d) |
| 1467 | { |
| 1468 | int error; |
| 1469 | |
| 1470 | KERNEL_LOCK(1, NULL); /* XXXSMP check ffs */ |
| 1471 | error = (*(mp->mnt_op->vfs_extattrctl))(mp, a, b, c, d); |
| 1472 | KERNEL_UNLOCK_ONE(NULL); /* XXX */ |
| 1473 | |
| 1474 | return error; |
| 1475 | } |
| 1476 | |
| 1477 | int |
| 1478 | VFS_SUSPENDCTL(struct mount *mp, int a) |
| 1479 | { |
| 1480 | int error; |
| 1481 | |
| 1482 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1483 | KERNEL_LOCK(1, NULL); |
| 1484 | } |
| 1485 | error = (*(mp->mnt_op->vfs_suspendctl))(mp, a); |
| 1486 | if ((mp->mnt_iflag & IMNT_MPSAFE) == 0) { |
| 1487 | KERNEL_UNLOCK_ONE(NULL); |
| 1488 | } |
| 1489 | |
| 1490 | return error; |
| 1491 | } |
| 1492 | |
| 1493 | #if defined(DDB) || defined(DEBUGPRINT) |
| 1494 | static const char buf_flagbits[] = BUF_FLAGBITS; |
| 1495 | |
| 1496 | void |
| 1497 | vfs_buf_print(struct buf *bp, int full, void (*pr)(const char *, ...)) |
| 1498 | { |
| 1499 | char bf[1024]; |
| 1500 | |
| 1501 | (*pr)(" vp %p lblkno 0x%" PRIx64" blkno 0x%" PRIx64" rawblkno 0x%" |
| 1502 | PRIx64 " dev 0x%x\n" , |
| 1503 | bp->b_vp, bp->b_lblkno, bp->b_blkno, bp->b_rawblkno, bp->b_dev); |
| 1504 | |
| 1505 | snprintb(bf, sizeof(bf), |
| 1506 | buf_flagbits, bp->b_flags | bp->b_oflags | bp->b_cflags); |
| 1507 | (*pr)(" error %d flags 0x%s\n" , bp->b_error, bf); |
| 1508 | |
| 1509 | (*pr)(" bufsize 0x%lx bcount 0x%lx resid 0x%lx\n" , |
| 1510 | bp->b_bufsize, bp->b_bcount, bp->b_resid); |
| 1511 | (*pr)(" data %p saveaddr %p\n" , |
| 1512 | bp->b_data, bp->b_saveaddr); |
| 1513 | (*pr)(" iodone %p objlock %p\n" , bp->b_iodone, bp->b_objlock); |
| 1514 | } |
| 1515 | |
| 1516 | void |
| 1517 | vfs_vnode_print(struct vnode *vp, int full, void (*pr)(const char *, ...)) |
| 1518 | { |
| 1519 | |
| 1520 | uvm_object_printit(&vp->v_uobj, full, pr); |
| 1521 | (*pr)("\n" ); |
| 1522 | vprint_common(vp, "" , printf); |
| 1523 | if (full) { |
| 1524 | struct buf *bp; |
| 1525 | |
| 1526 | (*pr)("clean bufs:\n" ); |
| 1527 | LIST_FOREACH(bp, &vp->v_cleanblkhd, b_vnbufs) { |
| 1528 | (*pr)(" bp %p\n" , bp); |
| 1529 | vfs_buf_print(bp, full, pr); |
| 1530 | } |
| 1531 | |
| 1532 | (*pr)("dirty bufs:\n" ); |
| 1533 | LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { |
| 1534 | (*pr)(" bp %p\n" , bp); |
| 1535 | vfs_buf_print(bp, full, pr); |
| 1536 | } |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | void |
| 1541 | vfs_mount_print(struct mount *mp, int full, void (*pr)(const char *, ...)) |
| 1542 | { |
| 1543 | char sbuf[256]; |
| 1544 | |
| 1545 | (*pr)("vnodecovered = %p data = %p\n" , |
| 1546 | mp->mnt_vnodecovered,mp->mnt_data); |
| 1547 | |
| 1548 | (*pr)("fs_bshift %d dev_bshift = %d\n" , |
| 1549 | mp->mnt_fs_bshift,mp->mnt_dev_bshift); |
| 1550 | |
| 1551 | snprintb(sbuf, sizeof(sbuf), __MNT_FLAG_BITS, mp->mnt_flag); |
| 1552 | (*pr)("flag = %s\n" , sbuf); |
| 1553 | |
| 1554 | snprintb(sbuf, sizeof(sbuf), __IMNT_FLAG_BITS, mp->mnt_iflag); |
| 1555 | (*pr)("iflag = %s\n" , sbuf); |
| 1556 | |
| 1557 | (*pr)("refcnt = %d unmounting @ %p updating @ %p\n" , mp->mnt_refcnt, |
| 1558 | &mp->mnt_unmounting, &mp->mnt_updating); |
| 1559 | |
| 1560 | (*pr)("statvfs cache:\n" ); |
| 1561 | (*pr)("\tbsize = %lu\n" ,mp->mnt_stat.f_bsize); |
| 1562 | (*pr)("\tfrsize = %lu\n" ,mp->mnt_stat.f_frsize); |
| 1563 | (*pr)("\tiosize = %lu\n" ,mp->mnt_stat.f_iosize); |
| 1564 | |
| 1565 | (*pr)("\tblocks = %" PRIu64"\n" ,mp->mnt_stat.f_blocks); |
| 1566 | (*pr)("\tbfree = %" PRIu64"\n" ,mp->mnt_stat.f_bfree); |
| 1567 | (*pr)("\tbavail = %" PRIu64"\n" ,mp->mnt_stat.f_bavail); |
| 1568 | (*pr)("\tbresvd = %" PRIu64"\n" ,mp->mnt_stat.f_bresvd); |
| 1569 | |
| 1570 | (*pr)("\tfiles = %" PRIu64"\n" ,mp->mnt_stat.f_files); |
| 1571 | (*pr)("\tffree = %" PRIu64"\n" ,mp->mnt_stat.f_ffree); |
| 1572 | (*pr)("\tfavail = %" PRIu64"\n" ,mp->mnt_stat.f_favail); |
| 1573 | (*pr)("\tfresvd = %" PRIu64"\n" ,mp->mnt_stat.f_fresvd); |
| 1574 | |
| 1575 | (*pr)("\tf_fsidx = { 0x%" PRIx32", 0x%" PRIx32" }\n" , |
| 1576 | mp->mnt_stat.f_fsidx.__fsid_val[0], |
| 1577 | mp->mnt_stat.f_fsidx.__fsid_val[1]); |
| 1578 | |
| 1579 | (*pr)("\towner = %" PRIu32"\n" ,mp->mnt_stat.f_owner); |
| 1580 | (*pr)("\tnamemax = %lu\n" ,mp->mnt_stat.f_namemax); |
| 1581 | |
| 1582 | snprintb(sbuf, sizeof(sbuf), __MNT_FLAG_BITS, mp->mnt_stat.f_flag); |
| 1583 | |
| 1584 | (*pr)("\tflag = %s\n" ,sbuf); |
| 1585 | (*pr)("\tsyncwrites = %" PRIu64 "\n" ,mp->mnt_stat.f_syncwrites); |
| 1586 | (*pr)("\tasyncwrites = %" PRIu64 "\n" ,mp->mnt_stat.f_asyncwrites); |
| 1587 | (*pr)("\tsyncreads = %" PRIu64 "\n" ,mp->mnt_stat.f_syncreads); |
| 1588 | (*pr)("\tasyncreads = %" PRIu64 "\n" ,mp->mnt_stat.f_asyncreads); |
| 1589 | (*pr)("\tfstypename = %s\n" ,mp->mnt_stat.f_fstypename); |
| 1590 | (*pr)("\tmntonname = %s\n" ,mp->mnt_stat.f_mntonname); |
| 1591 | (*pr)("\tmntfromname = %s\n" ,mp->mnt_stat.f_mntfromname); |
| 1592 | |
| 1593 | { |
| 1594 | int cnt = 0; |
| 1595 | struct vnode *vp; |
| 1596 | (*pr)("locked vnodes =" ); |
| 1597 | TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { |
| 1598 | if (VOP_ISLOCKED(vp)) { |
| 1599 | if ((++cnt % 6) == 0) { |
| 1600 | (*pr)(" %p,\n\t" , vp); |
| 1601 | } else { |
| 1602 | (*pr)(" %p," , vp); |
| 1603 | } |
| 1604 | } |
| 1605 | } |
| 1606 | (*pr)("\n" ); |
| 1607 | } |
| 1608 | |
| 1609 | if (full) { |
| 1610 | int cnt = 0; |
| 1611 | struct vnode *vp; |
| 1612 | (*pr)("all vnodes =" ); |
| 1613 | TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { |
| 1614 | if (!TAILQ_NEXT(vp, v_mntvnodes)) { |
| 1615 | (*pr)(" %p" , vp); |
| 1616 | } else if ((++cnt % 6) == 0) { |
| 1617 | (*pr)(" %p,\n\t" , vp); |
| 1618 | } else { |
| 1619 | (*pr)(" %p," , vp); |
| 1620 | } |
| 1621 | } |
| 1622 | (*pr)("\n" , vp); |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | /* |
| 1627 | * List all of the locked vnodes in the system. |
| 1628 | */ |
| 1629 | void printlockedvnodes(void); |
| 1630 | |
| 1631 | void |
| 1632 | printlockedvnodes(void) |
| 1633 | { |
| 1634 | struct mount *mp, *nmp; |
| 1635 | struct vnode *vp; |
| 1636 | |
| 1637 | printf("Locked vnodes\n" ); |
| 1638 | mutex_enter(&mountlist_lock); |
| 1639 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
| 1640 | if (vfs_busy(mp, &nmp)) { |
| 1641 | continue; |
| 1642 | } |
| 1643 | TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { |
| 1644 | if (VOP_ISLOCKED(vp)) |
| 1645 | vprint(NULL, vp); |
| 1646 | } |
| 1647 | mutex_enter(&mountlist_lock); |
| 1648 | vfs_unbusy(mp, false, &nmp); |
| 1649 | } |
| 1650 | mutex_exit(&mountlist_lock); |
| 1651 | } |
| 1652 | |
| 1653 | #endif /* DDB || DEBUGPRINT */ |
| 1654 | |