| 1 | /* |
| 2 | * |
| 3 | * Coda: an Experimental Distributed File System |
| 4 | * Release 3.1 |
| 5 | * |
| 6 | * Copyright (c) 1987-1998 Carnegie Mellon University |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * Permission to use, copy, modify and distribute this software and its |
| 10 | * documentation is hereby granted, provided that both the copyright |
| 11 | * notice and this permission notice appear in all copies of the |
| 12 | * software, derivative works or modified versions, and any portions |
| 13 | * thereof, and that both notices appear in supporting documentation, and |
| 14 | * that credit is given to Carnegie Mellon University in all documents |
| 15 | * and publicity pertaining to direct or indirect use of this code or its |
| 16 | * derivatives. |
| 17 | * |
| 18 | * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, |
| 19 | * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS |
| 20 | * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON |
| 21 | * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER |
| 22 | * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF |
| 23 | * ANY DERIVATIVE WORK. |
| 24 | * |
| 25 | * Carnegie Mellon encourages users of this software to return any |
| 26 | * improvements or extensions that they make, and to grant Carnegie |
| 27 | * Mellon the rights to redistribute these changes without encumbrance. |
| 28 | * |
| 29 | * @(#) src/sys/cfs/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ |
| 30 | * $FreeBSD: src/sys/coda/coda_vfsops.c,v 1.24.2.1 2001/07/26 20:36:45 iedowse Exp $ |
| 31 | * $DragonFly: src/sys/vfs/coda/Attic/coda_vfsops.c,v 1.3 2003/06/23 17:55:26 dillon Exp $ |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * Mach Operating System |
| 37 | * Copyright (c) 1989 Carnegie-Mellon University |
| 38 | * All rights reserved. The CMU software License Agreement specifies |
| 39 | * the terms and conditions for use and redistribution. |
| 40 | */ |
| 41 | |
| 42 | /* |
| 43 | * This code was written for the Coda file system at Carnegie Mellon |
| 44 | * University. Contributers include David Steere, James Kistler, and |
| 45 | * M. Satyanarayanan. |
| 46 | */ |
| 47 | |
| 48 | #include <vcoda.h> |
| 49 | |
| 50 | #include <sys/param.h> |
| 51 | #include <sys/systm.h> |
| 52 | #include <sys/kernel.h> |
| 53 | #include <sys/proc.h> |
| 54 | #include <sys/malloc.h> |
| 55 | #include <sys/conf.h> |
| 56 | #include <sys/namei.h> |
| 57 | #include <sys/mount.h> |
| 58 | #include <sys/select.h> |
| 59 | |
| 60 | #include <vm/vm_zone.h> |
| 61 | |
| 62 | #include <coda/coda.h> |
| 63 | #include <coda/cnode.h> |
| 64 | #include <coda/coda_vfsops.h> |
| 65 | #include <coda/coda_venus.h> |
| 66 | #include <coda/coda_subr.h> |
| 67 | #include <coda/coda_opstats.h> |
| 68 | |
| 69 | MALLOC_DEFINE(M_CODA, "CODA storage", "Various Coda Structures"); |
| 70 | |
| 71 | int codadebug = 0; |
| 72 | int coda_vfsop_print_entry = 0; |
| 73 | #define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) |
| 74 | |
| 75 | struct vnode *coda_ctlvp; |
| 76 | struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */ |
| 77 | |
| 78 | /* structure to keep statistics of internally generated/satisfied calls */ |
| 79 | |
| 80 | struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE]; |
| 81 | |
| 82 | #define MARK_ENTRY(op) (coda_vfsopstats[op].entries++) |
| 83 | #define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++) |
| 84 | #define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++) |
| 85 | #define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++) |
| 86 | |
| 87 | extern int coda_nc_initialized; /* Set if cache has been initialized */ |
| 88 | extern int vc_nb_open __P((dev_t, int, int, d_thread_t *)); |
| 89 | |
| 90 | int |
| 91 | coda_vfsopstats_init(void) |
| 92 | { |
| 93 | register int i; |
| 94 | |
| 95 | for (i=0;i<CODA_VFSOPS_SIZE;i++) { |
| 96 | coda_vfsopstats[i].opcode = i; |
| 97 | coda_vfsopstats[i].entries = 0; |
| 98 | coda_vfsopstats[i].sat_intrn = 0; |
| 99 | coda_vfsopstats[i].unsat_intrn = 0; |
| 100 | coda_vfsopstats[i].gen_intrn = 0; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * cfs mount vfsop |
| 108 | * Set up mount info record and attach it to vfs struct. |
| 109 | */ |
| 110 | /*ARGSUSED*/ |
| 111 | int |
| 112 | coda_mount(vfsp, path, data, ndp, p) |
| 113 | struct mount *vfsp; /* Allocated and initialized by mount(2) */ |
| 114 | char *path; /* path covered: ignored by the fs-layer */ |
| 115 | caddr_t data; /* Need to define a data type for this in netbsd? */ |
| 116 | struct nameidata *ndp; /* Clobber this to lookup the device name */ |
| 117 | struct proc *p; /* The ever-famous proc pointer */ |
| 118 | { |
| 119 | struct vnode *dvp; |
| 120 | struct cnode *cp; |
| 121 | dev_t dev; |
| 122 | struct coda_mntinfo *mi; |
| 123 | struct vnode *rootvp; |
| 124 | ViceFid rootfid; |
| 125 | ViceFid ctlfid; |
| 126 | int error; |
| 127 | |
| 128 | ENTRY; |
| 129 | |
| 130 | coda_vfsopstats_init(); |
| 131 | coda_vnodeopstats_init(); |
| 132 | |
| 133 | MARK_ENTRY(CODA_MOUNT_STATS); |
| 134 | if (CODA_MOUNTED(vfsp)) { |
| 135 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 136 | return(EBUSY); |
| 137 | } |
| 138 | |
| 139 | /* Validate mount device. Similar to getmdev(). */ |
| 140 | NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p); |
| 141 | error = namei(ndp); |
| 142 | dvp = ndp->ni_vp; |
| 143 | |
| 144 | if (error) { |
| 145 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 146 | return (error); |
| 147 | } |
| 148 | if (dvp->v_type != VCHR) { |
| 149 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 150 | vrele(dvp); |
| 151 | NDFREE(ndp, NDF_ONLY_PNBUF); |
| 152 | return(ENXIO); |
| 153 | } |
| 154 | dev = dvp->v_rdev; |
| 155 | vrele(dvp); |
| 156 | NDFREE(ndp, NDF_ONLY_PNBUF); |
| 157 | |
| 158 | /* |
| 159 | * See if the device table matches our expectations. |
| 160 | */ |
| 161 | if (devsw(dev)->d_open != vc_nb_open) |
| 162 | { |
| 163 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 164 | return(ENXIO); |
| 165 | } |
| 166 | |
| 167 | if (minor(dev) >= NVCODA || minor(dev) < 0) { |
| 168 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 169 | return(ENXIO); |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Initialize the mount record and link it to the vfs struct |
| 174 | */ |
| 175 | mi = &coda_mnttbl[minor(dev)]; |
| 176 | |
| 177 | if (!VC_OPEN(&mi->mi_vcomm)) { |
| 178 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 179 | return(ENODEV); |
| 180 | } |
| 181 | |
| 182 | /* No initialization (here) of mi_vcomm! */ |
| 183 | vfsp->mnt_data = (qaddr_t)mi; |
| 184 | vfs_getnewfsid (vfsp); |
| 185 | |
| 186 | mi->mi_vfsp = vfsp; |
| 187 | |
| 188 | /* |
| 189 | * Make a root vnode to placate the Vnode interface, but don't |
| 190 | * actually make the CODA_ROOT call to venus until the first call |
| 191 | * to coda_root in case a server is down while venus is starting. |
| 192 | */ |
| 193 | rootfid.Volume = 0; |
| 194 | rootfid.Vnode = 0; |
| 195 | rootfid.Unique = 0; |
| 196 | cp = make_coda_node(&rootfid, vfsp, VDIR); |
| 197 | rootvp = CTOV(cp); |
| 198 | rootvp->v_flag |= VROOT; |
| 199 | |
| 200 | ctlfid.Volume = CTL_VOL; |
| 201 | ctlfid.Vnode = CTL_VNO; |
| 202 | ctlfid.Unique = CTL_UNI; |
| 203 | /* cp = make_coda_node(&ctlfid, vfsp, VCHR); |
| 204 | The above code seems to cause a loop in the cnode links. |
| 205 | I don't totally understand when it happens, it is caught |
| 206 | when closing down the system. |
| 207 | */ |
| 208 | cp = make_coda_node(&ctlfid, 0, VCHR); |
| 209 | |
| 210 | coda_ctlvp = CTOV(cp); |
| 211 | |
| 212 | /* Add vfs and rootvp to chain of vfs hanging off mntinfo */ |
| 213 | mi->mi_vfsp = vfsp; |
| 214 | mi->mi_rootvp = rootvp; |
| 215 | |
| 216 | /* set filesystem block size */ |
| 217 | vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */ |
| 218 | |
| 219 | /* Set f_iosize. XXX -- inamura@isl.ntt.co.jp. |
| 220 | For vnode_pager_haspage() references. The value should be obtained |
| 221 | from underlying UFS. */ |
| 222 | /* Checked UFS. iosize is set as 8192 */ |
| 223 | vfsp->mnt_stat.f_iosize = 8192; |
| 224 | |
| 225 | /* error is currently guaranteed to be zero, but in case some |
| 226 | code changes... */ |
| 227 | CODADEBUG(1, |
| 228 | myprintf(("coda_mount returned %d\n",error));); |
| 229 | if (error) |
| 230 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 231 | else |
| 232 | MARK_INT_SAT(CODA_MOUNT_STATS); |
| 233 | |
| 234 | return(error); |
| 235 | } |
| 236 | |
| 237 | int |
| 238 | coda_unmount(vfsp, mntflags, p) |
| 239 | struct mount *vfsp; |
| 240 | int mntflags; |
| 241 | struct proc *p; |
| 242 | { |
| 243 | struct coda_mntinfo *mi = vftomi(vfsp); |
| 244 | int active, error = 0; |
| 245 | |
| 246 | ENTRY; |
| 247 | MARK_ENTRY(CODA_UMOUNT_STATS); |
| 248 | if (!CODA_MOUNTED(vfsp)) { |
| 249 | MARK_INT_FAIL(CODA_UMOUNT_STATS); |
| 250 | return(EINVAL); |
| 251 | } |
| 252 | |
| 253 | if (mi->mi_vfsp == vfsp) { /* We found the victim */ |
| 254 | if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp))) |
| 255 | return (EBUSY); /* Venus is still running */ |
| 256 | |
| 257 | #ifdef DEBUG |
| 258 | printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp)); |
| 259 | #endif |
| 260 | vrele(mi->mi_rootvp); |
| 261 | |
| 262 | active = coda_kill(vfsp, NOT_DOWNCALL); |
| 263 | mi->mi_rootvp->v_flag &= ~VROOT; |
| 264 | error = vflush(mi->mi_vfsp, 0, FORCECLOSE); |
| 265 | printf("coda_unmount: active = %d, vflush active %d\n", active, error); |
| 266 | error = 0; |
| 267 | /* I'm going to take this out to allow lookups to go through. I'm |
| 268 | * not sure it's important anyway. -- DCS 2/2/94 |
| 269 | */ |
| 270 | /* vfsp->VFS_DATA = NULL; */ |
| 271 | |
| 272 | /* No more vfsp's to hold onto */ |
| 273 | mi->mi_vfsp = NULL; |
| 274 | mi->mi_rootvp = NULL; |
| 275 | |
| 276 | if (error) |
| 277 | MARK_INT_FAIL(CODA_UMOUNT_STATS); |
| 278 | else |
| 279 | MARK_INT_SAT(CODA_UMOUNT_STATS); |
| 280 | |
| 281 | return(error); |
| 282 | } |
| 283 | return (EINVAL); |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * find root of cfs |
| 288 | */ |
| 289 | int |
| 290 | coda_root(vfsp, vpp) |
| 291 | struct mount *vfsp; |
| 292 | struct vnode **vpp; |
| 293 | { |
| 294 | struct coda_mntinfo *mi = vftomi(vfsp); |
| 295 | struct vnode **result; |
| 296 | int error; |
| 297 | struct proc *p = curproc; /* XXX - bnoble */ |
| 298 | ViceFid VFid; |
| 299 | |
| 300 | ENTRY; |
| 301 | MARK_ENTRY(CODA_ROOT_STATS); |
| 302 | result = NULL; |
| 303 | |
| 304 | if (vfsp == mi->mi_vfsp) { |
| 305 | if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) || |
| 306 | (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) || |
| 307 | (VTOC(mi->mi_rootvp)->c_fid.Unique != 0)) |
| 308 | { /* Found valid root. */ |
| 309 | *vpp = mi->mi_rootvp; |
| 310 | /* On Mach, this is vref. On NetBSD, VOP_LOCK */ |
| 311 | #if 1 |
| 312 | vref(*vpp); |
| 313 | vn_lock(*vpp, LK_EXCLUSIVE, p); |
| 314 | #else |
| 315 | vget(*vpp, LK_EXCLUSIVE, p); |
| 316 | #endif |
| 317 | MARK_INT_SAT(CODA_ROOT_STATS); |
| 318 | return(0); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | error = venus_root(vftomi(vfsp), p->p_ucred, p, &VFid); |
| 323 | |
| 324 | if (!error) { |
| 325 | /* |
| 326 | * Save the new rootfid in the cnode, and rehash the cnode into the |
| 327 | * cnode hash with the new fid key. |
| 328 | */ |
| 329 | coda_unsave(VTOC(mi->mi_rootvp)); |
| 330 | VTOC(mi->mi_rootvp)->c_fid = VFid; |
| 331 | coda_save(VTOC(mi->mi_rootvp)); |
| 332 | |
| 333 | *vpp = mi->mi_rootvp; |
| 334 | #if 1 |
| 335 | vref(*vpp); |
| 336 | vn_lock(*vpp, LK_EXCLUSIVE, p); |
| 337 | #else |
| 338 | vget(*vpp, LK_EXCLUSIVE, p); |
| 339 | #endif |
| 340 | |
| 341 | MARK_INT_SAT(CODA_ROOT_STATS); |
| 342 | goto exit; |
| 343 | } else if (error == ENODEV || error == EINTR) { |
| 344 | /* Gross hack here! */ |
| 345 | /* |
| 346 | * If Venus fails to respond to the CODA_ROOT call, coda_call returns |
| 347 | * ENODEV. Return the uninitialized root vnode to allow vfs |
| 348 | * operations such as unmount to continue. Without this hack, |
| 349 | * there is no way to do an unmount if Venus dies before a |
| 350 | * successful CODA_ROOT call is done. All vnode operations |
| 351 | * will fail. |
| 352 | */ |
| 353 | *vpp = mi->mi_rootvp; |
| 354 | #if 1 |
| 355 | vref(*vpp); |
| 356 | vn_lock(*vpp, LK_EXCLUSIVE, p); |
| 357 | #else |
| 358 | vget(*vpp, LK_EXCLUSIVE, p); |
| 359 | #endif |
| 360 | |
| 361 | MARK_INT_FAIL(CODA_ROOT_STATS); |
| 362 | error = 0; |
| 363 | goto exit; |
| 364 | } else { |
| 365 | CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); ); |
| 366 | MARK_INT_FAIL(CODA_ROOT_STATS); |
| 367 | |
| 368 | goto exit; |
| 369 | } |
| 370 | |
| 371 | exit: |
| 372 | return(error); |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Get file system statistics. |
| 377 | */ |
| 378 | int |
| 379 | coda_nb_statfs(vfsp, sbp, p) |
| 380 | register struct mount *vfsp; |
| 381 | struct statfs *sbp; |
| 382 | struct proc *p; |
| 383 | { |
| 384 | ENTRY; |
| 385 | /* MARK_ENTRY(CODA_STATFS_STATS); */ |
| 386 | if (!CODA_MOUNTED(vfsp)) { |
| 387 | /* MARK_INT_FAIL(CODA_STATFS_STATS);*/ |
| 388 | return(EINVAL); |
| 389 | } |
| 390 | |
| 391 | bzero(sbp, sizeof(struct statfs)); |
| 392 | /* XXX - what to do about f_flags, others? --bnoble */ |
| 393 | /* Below This is what AFS does |
| 394 | #define NB_SFS_SIZ 0x895440 |
| 395 | */ |
| 396 | /* Note: Normal fs's have a bsize of 0x400 == 1024 */ |
| 397 | sbp->f_type = vfsp->mnt_vfc->vfc_typenum; |
| 398 | sbp->f_bsize = 8192; /* XXX */ |
| 399 | sbp->f_iosize = 8192; /* XXX */ |
| 400 | #define NB_SFS_SIZ 0x8AB75D |
| 401 | sbp->f_blocks = NB_SFS_SIZ; |
| 402 | sbp->f_bfree = NB_SFS_SIZ; |
| 403 | sbp->f_bavail = NB_SFS_SIZ; |
| 404 | sbp->f_files = NB_SFS_SIZ; |
| 405 | sbp->f_ffree = NB_SFS_SIZ; |
| 406 | bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t)); |
| 407 | snprintf(sbp->f_mntonname, sizeof(sbp->f_mntonname), "/coda"); |
| 408 | snprintf(sbp->f_mntfromname, sizeof(sbp->f_mntfromname), "CODA"); |
| 409 | /* MARK_INT_SAT(CODA_STATFS_STATS); */ |
| 410 | return(0); |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * Flush any pending I/O. |
| 415 | */ |
| 416 | int |
| 417 | coda_sync(vfsp, waitfor, cred, p) |
| 418 | struct mount *vfsp; |
| 419 | int waitfor; |
| 420 | struct ucred *cred; |
| 421 | struct proc *p; |
| 422 | { |
| 423 | ENTRY; |
| 424 | MARK_ENTRY(CODA_SYNC_STATS); |
| 425 | MARK_INT_SAT(CODA_SYNC_STATS); |
| 426 | return(0); |
| 427 | } |
| 428 | |
| 429 | /* |
| 430 | * fhtovp is now what vget used to be in 4.3-derived systems. For |
| 431 | * some silly reason, vget is now keyed by a 32 bit ino_t, rather than |
| 432 | * a type-specific fid. |
| 433 | */ |
| 434 | int |
| 435 | coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp) |
| 436 | register struct mount *vfsp; |
| 437 | struct fid *fhp; |
| 438 | struct mbuf *nam; |
| 439 | struct vnode **vpp; |
| 440 | int *exflagsp; |
| 441 | struct ucred **creadanonp; |
| 442 | { |
| 443 | struct cfid *cfid = (struct cfid *)fhp; |
| 444 | struct cnode *cp = 0; |
| 445 | int error; |
| 446 | struct proc *p = curproc; /* XXX -mach */ |
| 447 | ViceFid VFid; |
| 448 | int vtype; |
| 449 | |
| 450 | ENTRY; |
| 451 | |
| 452 | MARK_ENTRY(CODA_VGET_STATS); |
| 453 | /* Check for vget of control object. */ |
| 454 | if (IS_CTL_FID(&cfid->cfid_fid)) { |
| 455 | *vpp = coda_ctlvp; |
| 456 | vref(coda_ctlvp); |
| 457 | MARK_INT_SAT(CODA_VGET_STATS); |
| 458 | return(0); |
| 459 | } |
| 460 | |
| 461 | error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_ucred, p, &VFid, &vtype); |
| 462 | |
| 463 | if (error) { |
| 464 | CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));) |
| 465 | *vpp = (struct vnode *)0; |
| 466 | } else { |
| 467 | CODADEBUG(CODA_VGET, |
| 468 | myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n", |
| 469 | VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); ) |
| 470 | |
| 471 | cp = make_coda_node(&VFid, vfsp, vtype); |
| 472 | *vpp = CTOV(cp); |
| 473 | } |
| 474 | return(error); |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * To allow for greater ease of use, some vnodes may be orphaned when |
| 479 | * Venus dies. Certain operations should still be allowed to go |
| 480 | * through, but without propagating ophan-ness. So this function will |
| 481 | * get a new vnode for the file from the current run of Venus. */ |
| 482 | |
| 483 | int |
| 484 | getNewVnode(vpp) |
| 485 | struct vnode **vpp; |
| 486 | { |
| 487 | struct cfid cfid; |
| 488 | struct coda_mntinfo *mi = vftomi((*vpp)->v_mount); |
| 489 | |
| 490 | ENTRY; |
| 491 | |
| 492 | cfid.cfid_len = (short)sizeof(ViceFid); |
| 493 | cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */ |
| 494 | /* XXX ? */ |
| 495 | |
| 496 | /* We're guessing that if set, the 1st element on the list is a |
| 497 | * valid vnode to use. If not, return ENODEV as venus is dead. |
| 498 | */ |
| 499 | if (mi->mi_vfsp == NULL) |
| 500 | return ENODEV; |
| 501 | |
| 502 | return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp, |
| 503 | NULL, NULL); |
| 504 | } |
| 505 | |
| 506 | #include <ufs/ufs/quota.h> |
| 507 | #include <ufs/ufs/ufsmount.h> |
| 508 | /* get the mount structure corresponding to a given device. Assume |
| 509 | * device corresponds to a UFS. Return NULL if no device is found. |
| 510 | */ |
| 511 | struct mount *devtomp(dev) |
| 512 | dev_t dev; |
| 513 | { |
| 514 | struct mount *mp; |
| 515 | |
| 516 | TAILQ_FOREACH(mp, &mountlist, mnt_list) { |
| 517 | if (((VFSTOUFS(mp))->um_dev == dev)) { |
| 518 | /* mount corresponds to UFS and the device matches one we want */ |
| 519 | return(mp); |
| 520 | } |
| 521 | } |
| 522 | /* mount structure wasn't found */ |
| 523 | return(NULL); |
| 524 | } |
| 525 | |
| 526 | struct vfsops coda_vfsops = { |
| 527 | coda_mount, |
| 528 | vfs_stdstart, |
| 529 | coda_unmount, |
| 530 | coda_root, |
| 531 | vfs_stdquotactl, |
| 532 | coda_nb_statfs, |
| 533 | coda_sync, |
| 534 | vfs_stdvget, |
| 535 | vfs_stdfhtovp, |
| 536 | vfs_stdcheckexp, |
| 537 | vfs_stdvptofh, |
| 538 | vfs_stdinit, |
| 539 | vfs_stduninit, |
| 540 | vfs_stdextattrctl, |
| 541 | }; |
| 542 | |
| 543 | VFS_SET(coda_vfsops, coda, VFCF_NETWORK); |