| 1 | /* $NetBSD: coda_vfsops.c,v 1.84 2014/12/13 15:59:30 hannken Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * |
| 5 | * Coda: an Experimental Distributed File System |
| 6 | * Release 3.1 |
| 7 | * |
| 8 | * Copyright (c) 1987-1998 Carnegie Mellon University |
| 9 | * All Rights Reserved |
| 10 | * |
| 11 | * Permission to use, copy, modify and distribute this software and its |
| 12 | * documentation is hereby granted, provided that both the copyright |
| 13 | * notice and this permission notice appear in all copies of the |
| 14 | * software, derivative works or modified versions, and any portions |
| 15 | * thereof, and that both notices appear in supporting documentation, and |
| 16 | * that credit is given to Carnegie Mellon University in all documents |
| 17 | * and publicity pertaining to direct or indirect use of this code or its |
| 18 | * derivatives. |
| 19 | * |
| 20 | * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, |
| 21 | * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS |
| 22 | * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON |
| 23 | * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER |
| 24 | * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF |
| 25 | * ANY DERIVATIVE WORK. |
| 26 | * |
| 27 | * Carnegie Mellon encourages users of this software to return any |
| 28 | * improvements or extensions that they make, and to grant Carnegie |
| 29 | * Mellon the rights to redistribute these changes without encumbrance. |
| 30 | * |
| 31 | * @(#) cfs/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:26:45 rvb Exp $ |
| 32 | */ |
| 33 | |
| 34 | /* |
| 35 | * Mach Operating System |
| 36 | * Copyright (c) 1989 Carnegie-Mellon University |
| 37 | * All rights reserved. The CMU software License Agreement specifies |
| 38 | * the terms and conditions for use and redistribution. |
| 39 | */ |
| 40 | |
| 41 | /* |
| 42 | * This code was written for the Coda file system at Carnegie Mellon |
| 43 | * University. Contributers include David Steere, James Kistler, and |
| 44 | * M. Satyanarayanan. |
| 45 | */ |
| 46 | |
| 47 | #include <sys/cdefs.h> |
| 48 | __KERNEL_RCSID(0, "$NetBSD: coda_vfsops.c,v 1.84 2014/12/13 15:59:30 hannken Exp $" ); |
| 49 | |
| 50 | #include <sys/param.h> |
| 51 | #include <sys/systm.h> |
| 52 | #include <sys/sysctl.h> |
| 53 | #include <sys/malloc.h> |
| 54 | #include <sys/conf.h> |
| 55 | #include <sys/namei.h> |
| 56 | #include <sys/dirent.h> |
| 57 | #include <sys/mount.h> |
| 58 | #include <sys/proc.h> |
| 59 | #include <sys/select.h> |
| 60 | #include <sys/kauth.h> |
| 61 | #include <sys/module.h> |
| 62 | |
| 63 | #include <coda/coda.h> |
| 64 | #include <coda/cnode.h> |
| 65 | #include <coda/coda_vfsops.h> |
| 66 | #include <coda/coda_venus.h> |
| 67 | #include <coda/coda_subr.h> |
| 68 | #include <coda/coda_opstats.h> |
| 69 | /* for VN_RDEV */ |
| 70 | #include <miscfs/specfs/specdev.h> |
| 71 | #include <miscfs/genfs/genfs.h> |
| 72 | |
| 73 | MODULE(MODULE_CLASS_VFS, coda, "vcoda" ); |
| 74 | |
| 75 | #define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__func__)) |
| 76 | |
| 77 | extern struct vnode *coda_ctlvp; |
| 78 | extern struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */ |
| 79 | |
| 80 | /* structure to keep statistics of internally generated/satisfied calls */ |
| 81 | |
| 82 | struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE]; |
| 83 | |
| 84 | #define MARK_ENTRY(op) (coda_vfsopstats[op].entries++) |
| 85 | #define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++) |
| 86 | #define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++) |
| 87 | #define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++) |
| 88 | |
| 89 | extern const struct cdevsw vcoda_cdevsw; |
| 90 | extern const struct vnodeopv_desc coda_vnodeop_opv_desc; |
| 91 | |
| 92 | const struct vnodeopv_desc * const coda_vnodeopv_descs[] = { |
| 93 | &coda_vnodeop_opv_desc, |
| 94 | NULL, |
| 95 | }; |
| 96 | |
| 97 | struct vfsops coda_vfsops = { |
| 98 | .vfs_name = MOUNT_CODA, |
| 99 | .vfs_min_mount_data = 256, |
| 100 | /* This is the pathname, unlike every other fs */ |
| 101 | .vfs_mount = coda_mount, |
| 102 | .vfs_start = coda_start, |
| 103 | .vfs_unmount = coda_unmount, |
| 104 | .vfs_root = coda_root, |
| 105 | .vfs_quotactl = (void *)eopnotsupp, |
| 106 | .vfs_statvfs = coda_nb_statvfs, |
| 107 | .vfs_sync = coda_sync, |
| 108 | .vfs_vget = coda_vget, |
| 109 | .vfs_loadvnode = coda_loadvnode, |
| 110 | .vfs_fhtovp = (void *)eopnotsupp, |
| 111 | .vfs_vptofh = (void *)eopnotsupp, |
| 112 | .vfs_init = coda_init, |
| 113 | .vfs_done = coda_done, |
| 114 | .vfs_mountroot = (void *)eopnotsupp, |
| 115 | .vfs_snapshot = (void *)eopnotsupp, |
| 116 | .vfs_extattrctl = vfs_stdextattrctl, |
| 117 | .vfs_suspendctl = (void *)eopnotsupp, |
| 118 | .vfs_renamelock_enter = genfs_renamelock_enter, |
| 119 | .vfs_renamelock_exit = genfs_renamelock_exit, |
| 120 | .vfs_fsync = (void *)eopnotsupp, |
| 121 | .vfs_opv_descs = coda_vnodeopv_descs |
| 122 | }; |
| 123 | |
| 124 | static int |
| 125 | coda_modcmd(modcmd_t cmd, void *arg) |
| 126 | { |
| 127 | |
| 128 | switch (cmd) { |
| 129 | case MODULE_CMD_INIT: |
| 130 | return vfs_attach(&coda_vfsops); |
| 131 | case MODULE_CMD_FINI: |
| 132 | return vfs_detach(&coda_vfsops); |
| 133 | default: |
| 134 | return ENOTTY; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | int |
| 139 | coda_vfsopstats_init(void) |
| 140 | { |
| 141 | int i; |
| 142 | |
| 143 | for (i=0;i<CODA_VFSOPS_SIZE;i++) { |
| 144 | coda_vfsopstats[i].opcode = i; |
| 145 | coda_vfsopstats[i].entries = 0; |
| 146 | coda_vfsopstats[i].sat_intrn = 0; |
| 147 | coda_vfsopstats[i].unsat_intrn = 0; |
| 148 | coda_vfsopstats[i].gen_intrn = 0; |
| 149 | } |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * cfs mount vfsop |
| 156 | * Set up mount info record and attach it to vfs struct. |
| 157 | */ |
| 158 | /*ARGSUSED*/ |
| 159 | int |
| 160 | coda_mount(struct mount *vfsp, /* Allocated and initialized by mount(2) */ |
| 161 | const char *path, /* path covered: ignored by the fs-layer */ |
| 162 | void *data, /* Need to define a data type for this in netbsd? */ |
| 163 | size_t *data_len) |
| 164 | { |
| 165 | struct lwp *l = curlwp; |
| 166 | struct vnode *dvp; |
| 167 | struct cnode *cp; |
| 168 | dev_t dev; |
| 169 | struct coda_mntinfo *mi; |
| 170 | struct vnode *rtvp; |
| 171 | const struct cdevsw *cdev; |
| 172 | CodaFid rootfid = INVAL_FID; |
| 173 | CodaFid ctlfid = CTL_FID; |
| 174 | int error; |
| 175 | |
| 176 | if (data == NULL) |
| 177 | return EINVAL; |
| 178 | if (vfsp->mnt_flag & MNT_GETARGS) |
| 179 | return EINVAL; |
| 180 | ENTRY; |
| 181 | |
| 182 | coda_vfsopstats_init(); |
| 183 | coda_vnodeopstats_init(); |
| 184 | |
| 185 | MARK_ENTRY(CODA_MOUNT_STATS); |
| 186 | if (CODA_MOUNTED(vfsp)) { |
| 187 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 188 | return(EBUSY); |
| 189 | } |
| 190 | |
| 191 | /* Validate mount device. Similar to getmdev(). */ |
| 192 | |
| 193 | /* |
| 194 | * XXX: coda passes the mount device as the entire mount args, |
| 195 | * All other fs pass a structure contining a pointer. |
| 196 | * In order to get sys_mount() to do the copyin() we've set a |
| 197 | * fixed default size for the filename buffer. |
| 198 | */ |
| 199 | /* Ensure that namei() doesn't run off the filename buffer */ |
| 200 | ((char *)data)[*data_len - 1] = 0; |
| 201 | error = namei_simple_kernel((char *)data, NSM_FOLLOW_NOEMULROOT, |
| 202 | &dvp); |
| 203 | |
| 204 | if (error) { |
| 205 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 206 | return (error); |
| 207 | } |
| 208 | if (dvp->v_type != VCHR) { |
| 209 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 210 | vrele(dvp); |
| 211 | return(ENXIO); |
| 212 | } |
| 213 | dev = dvp->v_rdev; |
| 214 | vrele(dvp); |
| 215 | cdev = cdevsw_lookup(dev); |
| 216 | if (cdev == NULL) { |
| 217 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 218 | return(ENXIO); |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * See if the device table matches our expectations. |
| 223 | */ |
| 224 | if (cdev != &vcoda_cdevsw) |
| 225 | { |
| 226 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 227 | return(ENXIO); |
| 228 | } |
| 229 | |
| 230 | if (minor(dev) >= NVCODA) { |
| 231 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 232 | return(ENXIO); |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Initialize the mount record and link it to the vfs struct |
| 237 | */ |
| 238 | mi = &coda_mnttbl[minor(dev)]; |
| 239 | |
| 240 | if (!VC_OPEN(&mi->mi_vcomm)) { |
| 241 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 242 | return(ENODEV); |
| 243 | } |
| 244 | |
| 245 | /* No initialization (here) of mi_vcomm! */ |
| 246 | vfsp->mnt_data = mi; |
| 247 | vfsp->mnt_stat.f_fsidx.__fsid_val[0] = 0; |
| 248 | vfsp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CODA); |
| 249 | vfsp->mnt_stat.f_fsid = vfsp->mnt_stat.f_fsidx.__fsid_val[0]; |
| 250 | vfsp->mnt_stat.f_namemax = CODA_MAXNAMLEN; |
| 251 | mi->mi_vfsp = vfsp; |
| 252 | |
| 253 | /* |
| 254 | * Make a root vnode to placate the Vnode interface, but don't |
| 255 | * actually make the CODA_ROOT call to venus until the first call |
| 256 | * to coda_root in case a server is down while venus is starting. |
| 257 | */ |
| 258 | cp = make_coda_node(&rootfid, vfsp, VDIR); |
| 259 | rtvp = CTOV(cp); |
| 260 | rtvp->v_vflag |= VV_ROOT; |
| 261 | |
| 262 | cp = make_coda_node(&ctlfid, vfsp, VCHR); |
| 263 | |
| 264 | coda_ctlvp = CTOV(cp); |
| 265 | |
| 266 | /* Add vfs and rootvp to chain of vfs hanging off mntinfo */ |
| 267 | mi->mi_vfsp = vfsp; |
| 268 | mi->mi_rootvp = rtvp; |
| 269 | |
| 270 | /* set filesystem block size */ |
| 271 | vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */ |
| 272 | vfsp->mnt_stat.f_frsize = 8192; /* XXX -JJK */ |
| 273 | |
| 274 | /* error is currently guaranteed to be zero, but in case some |
| 275 | code changes... */ |
| 276 | CODADEBUG(1, |
| 277 | myprintf(("coda_mount returned %d\n" ,error));); |
| 278 | if (error) |
| 279 | MARK_INT_FAIL(CODA_MOUNT_STATS); |
| 280 | else |
| 281 | MARK_INT_SAT(CODA_MOUNT_STATS); |
| 282 | |
| 283 | return set_statvfs_info("/coda" , UIO_SYSSPACE, "CODA" , UIO_SYSSPACE, |
| 284 | vfsp->mnt_op->vfs_name, vfsp, l); |
| 285 | } |
| 286 | |
| 287 | int |
| 288 | coda_start(struct mount *vfsp, int flags) |
| 289 | { |
| 290 | ENTRY; |
| 291 | vftomi(vfsp)->mi_started = 1; |
| 292 | return (0); |
| 293 | } |
| 294 | |
| 295 | int |
| 296 | coda_unmount(struct mount *vfsp, int mntflags) |
| 297 | { |
| 298 | struct coda_mntinfo *mi = vftomi(vfsp); |
| 299 | int active, error = 0; |
| 300 | |
| 301 | ENTRY; |
| 302 | MARK_ENTRY(CODA_UMOUNT_STATS); |
| 303 | if (!CODA_MOUNTED(vfsp)) { |
| 304 | MARK_INT_FAIL(CODA_UMOUNT_STATS); |
| 305 | return(EINVAL); |
| 306 | } |
| 307 | |
| 308 | if (mi->mi_vfsp == vfsp) { /* We found the victim */ |
| 309 | if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp))) |
| 310 | return (EBUSY); /* Venus is still running */ |
| 311 | |
| 312 | #ifdef DEBUG |
| 313 | printf("coda_unmount: ROOT: vp %p, cp %p\n" , mi->mi_rootvp, VTOC(mi->mi_rootvp)); |
| 314 | #endif |
| 315 | mi->mi_started = 0; |
| 316 | |
| 317 | vrele(mi->mi_rootvp); |
| 318 | vrele(coda_ctlvp); |
| 319 | |
| 320 | active = coda_kill(vfsp, NOT_DOWNCALL); |
| 321 | mi->mi_rootvp->v_vflag &= ~VV_ROOT; |
| 322 | error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE); |
| 323 | printf("coda_unmount: active = %d, vflush active %d\n" , active, error); |
| 324 | error = 0; |
| 325 | |
| 326 | /* I'm going to take this out to allow lookups to go through. I'm |
| 327 | * not sure it's important anyway. -- DCS 2/2/94 |
| 328 | */ |
| 329 | /* vfsp->VFS_DATA = NULL; */ |
| 330 | |
| 331 | /* No more vfsp's to hold onto */ |
| 332 | mi->mi_vfsp = NULL; |
| 333 | mi->mi_rootvp = NULL; |
| 334 | |
| 335 | if (error) |
| 336 | MARK_INT_FAIL(CODA_UMOUNT_STATS); |
| 337 | else |
| 338 | MARK_INT_SAT(CODA_UMOUNT_STATS); |
| 339 | |
| 340 | return(error); |
| 341 | } |
| 342 | return (EINVAL); |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * find root of cfs |
| 347 | */ |
| 348 | int |
| 349 | coda_root(struct mount *vfsp, struct vnode **vpp) |
| 350 | { |
| 351 | struct coda_mntinfo *mi = vftomi(vfsp); |
| 352 | int error; |
| 353 | struct lwp *l = curlwp; /* XXX - bnoble */ |
| 354 | CodaFid VFid; |
| 355 | static const CodaFid invalfid = INVAL_FID; |
| 356 | |
| 357 | ENTRY; |
| 358 | MARK_ENTRY(CODA_ROOT_STATS); |
| 359 | |
| 360 | if (vfsp == mi->mi_vfsp) { |
| 361 | if (memcmp(&VTOC(mi->mi_rootvp)->c_fid, &invalfid, sizeof(CodaFid))) |
| 362 | { /* Found valid root. */ |
| 363 | *vpp = mi->mi_rootvp; |
| 364 | /* On Mach, this is vref. On NetBSD, VOP_LOCK */ |
| 365 | vref(*vpp); |
| 366 | vn_lock(*vpp, LK_EXCLUSIVE); |
| 367 | MARK_INT_SAT(CODA_ROOT_STATS); |
| 368 | return(0); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | error = venus_root(vftomi(vfsp), l->l_cred, l->l_proc, &VFid); |
| 373 | |
| 374 | if (!error) { |
| 375 | struct cnode *cp = VTOC(mi->mi_rootvp); |
| 376 | |
| 377 | /* |
| 378 | * Save the new rootfid in the cnode, and rekey the cnode |
| 379 | * with the new fid key. |
| 380 | */ |
| 381 | error = vcache_rekey_enter(vfsp, mi->mi_rootvp, |
| 382 | &invalfid, sizeof(CodaFid), &VFid, sizeof(CodaFid)); |
| 383 | if (error) |
| 384 | goto exit; |
| 385 | cp->c_fid = VFid; |
| 386 | vcache_rekey_exit(vfsp, mi->mi_rootvp, |
| 387 | &invalfid, sizeof(CodaFid), &cp->c_fid, sizeof(CodaFid)); |
| 388 | |
| 389 | *vpp = mi->mi_rootvp; |
| 390 | vref(*vpp); |
| 391 | vn_lock(*vpp, LK_EXCLUSIVE); |
| 392 | MARK_INT_SAT(CODA_ROOT_STATS); |
| 393 | goto exit; |
| 394 | } else if (error == ENODEV || error == EINTR) { |
| 395 | /* Gross hack here! */ |
| 396 | /* |
| 397 | * If Venus fails to respond to the CODA_ROOT call, coda_call returns |
| 398 | * ENODEV. Return the uninitialized root vnode to allow vfs |
| 399 | * operations such as unmount to continue. Without this hack, |
| 400 | * there is no way to do an unmount if Venus dies before a |
| 401 | * successful CODA_ROOT call is done. All vnode operations |
| 402 | * will fail. |
| 403 | */ |
| 404 | *vpp = mi->mi_rootvp; |
| 405 | vref(*vpp); |
| 406 | vn_lock(*vpp, LK_EXCLUSIVE); |
| 407 | MARK_INT_FAIL(CODA_ROOT_STATS); |
| 408 | error = 0; |
| 409 | goto exit; |
| 410 | } else { |
| 411 | CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n" , error)); ); |
| 412 | MARK_INT_FAIL(CODA_ROOT_STATS); |
| 413 | |
| 414 | goto exit; |
| 415 | } |
| 416 | exit: |
| 417 | return(error); |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Get file system statistics. |
| 422 | */ |
| 423 | int |
| 424 | coda_nb_statvfs(struct mount *vfsp, struct statvfs *sbp) |
| 425 | { |
| 426 | struct lwp *l = curlwp; |
| 427 | struct coda_statfs fsstat; |
| 428 | int error; |
| 429 | |
| 430 | ENTRY; |
| 431 | MARK_ENTRY(CODA_STATFS_STATS); |
| 432 | if (!CODA_MOUNTED(vfsp)) { |
| 433 | /* MARK_INT_FAIL(CODA_STATFS_STATS); */ |
| 434 | return(EINVAL); |
| 435 | } |
| 436 | |
| 437 | /* XXX - what to do about f_flags, others? --bnoble */ |
| 438 | /* Below This is what AFS does |
| 439 | #define NB_SFS_SIZ 0x895440 |
| 440 | */ |
| 441 | /* Note: Normal fs's have a bsize of 0x400 == 1024 */ |
| 442 | |
| 443 | error = venus_statfs(vftomi(vfsp), l->l_cred, l, &fsstat); |
| 444 | |
| 445 | if (!error) { |
| 446 | sbp->f_bsize = 8192; /* XXX */ |
| 447 | sbp->f_frsize = 8192; /* XXX */ |
| 448 | sbp->f_iosize = 8192; /* XXX */ |
| 449 | sbp->f_blocks = fsstat.f_blocks; |
| 450 | sbp->f_bfree = fsstat.f_bfree; |
| 451 | sbp->f_bavail = fsstat.f_bavail; |
| 452 | sbp->f_bresvd = 0; |
| 453 | sbp->f_files = fsstat.f_files; |
| 454 | sbp->f_ffree = fsstat.f_ffree; |
| 455 | sbp->f_favail = fsstat.f_ffree; |
| 456 | sbp->f_fresvd = 0; |
| 457 | copy_statvfs_info(sbp, vfsp); |
| 458 | } |
| 459 | |
| 460 | MARK_INT_SAT(CODA_STATFS_STATS); |
| 461 | return(error); |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Flush any pending I/O. |
| 466 | */ |
| 467 | int |
| 468 | coda_sync(struct mount *vfsp, int waitfor, |
| 469 | kauth_cred_t cred) |
| 470 | { |
| 471 | ENTRY; |
| 472 | MARK_ENTRY(CODA_SYNC_STATS); |
| 473 | MARK_INT_SAT(CODA_SYNC_STATS); |
| 474 | return(0); |
| 475 | } |
| 476 | |
| 477 | int |
| 478 | coda_vget(struct mount *vfsp, ino_t ino, |
| 479 | struct vnode **vpp) |
| 480 | { |
| 481 | ENTRY; |
| 482 | return (EOPNOTSUPP); |
| 483 | } |
| 484 | |
| 485 | int |
| 486 | coda_loadvnode(struct mount *mp, struct vnode *vp, |
| 487 | const void *key, size_t key_len, const void **new_key) |
| 488 | { |
| 489 | CodaFid fid; |
| 490 | struct cnode *cp; |
| 491 | extern int (**coda_vnodeop_p)(void *); |
| 492 | |
| 493 | KASSERT(key_len == sizeof(CodaFid)); |
| 494 | memcpy(&fid, key, key_len); |
| 495 | |
| 496 | cp = kmem_zalloc(sizeof(*cp), KM_SLEEP); |
| 497 | mutex_init(&cp->c_lock, MUTEX_DEFAULT, IPL_NONE); |
| 498 | cp->c_fid = fid; |
| 499 | cp->c_vnode = vp; |
| 500 | vp->v_op = coda_vnodeop_p; |
| 501 | vp->v_tag = VT_CODA; |
| 502 | vp->v_type = VNON; |
| 503 | vp->v_data = cp; |
| 504 | |
| 505 | *new_key = &cp->c_fid; |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * fhtovp is now what vget used to be in 4.3-derived systems. For |
| 512 | * some silly reason, vget is now keyed by a 32 bit ino_t, rather than |
| 513 | * a type-specific fid. |
| 514 | */ |
| 515 | int |
| 516 | coda_fhtovp(struct mount *vfsp, struct fid *fhp, struct mbuf *nam, |
| 517 | struct vnode **vpp, int *exflagsp, |
| 518 | kauth_cred_t *creadanonp) |
| 519 | { |
| 520 | struct cfid *cfid = (struct cfid *)fhp; |
| 521 | struct cnode *cp = 0; |
| 522 | int error; |
| 523 | struct lwp *l = curlwp; /* XXX -mach */ |
| 524 | CodaFid VFid; |
| 525 | int vtype; |
| 526 | |
| 527 | ENTRY; |
| 528 | |
| 529 | MARK_ENTRY(CODA_VGET_STATS); |
| 530 | /* Check for vget of control object. */ |
| 531 | if (IS_CTL_FID(&cfid->cfid_fid)) { |
| 532 | *vpp = coda_ctlvp; |
| 533 | vref(coda_ctlvp); |
| 534 | MARK_INT_SAT(CODA_VGET_STATS); |
| 535 | return(0); |
| 536 | } |
| 537 | |
| 538 | error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, l->l_cred, l->l_proc, &VFid, &vtype); |
| 539 | |
| 540 | if (error) { |
| 541 | CODADEBUG(CODA_VGET, myprintf(("vget error %d\n" ,error));) |
| 542 | *vpp = (struct vnode *)0; |
| 543 | } else { |
| 544 | CODADEBUG(CODA_VGET, |
| 545 | myprintf(("vget: %s type %d result %d\n" , |
| 546 | coda_f2s(&VFid), vtype, error)); ) |
| 547 | |
| 548 | cp = make_coda_node(&VFid, vfsp, vtype); |
| 549 | *vpp = CTOV(cp); |
| 550 | } |
| 551 | return(error); |
| 552 | } |
| 553 | |
| 554 | int |
| 555 | coda_vptofh(struct vnode *vnp, struct fid *fidp) |
| 556 | { |
| 557 | ENTRY; |
| 558 | return (EOPNOTSUPP); |
| 559 | } |
| 560 | |
| 561 | void |
| 562 | coda_init(void) |
| 563 | { |
| 564 | ENTRY; |
| 565 | } |
| 566 | |
| 567 | void |
| 568 | coda_done(void) |
| 569 | { |
| 570 | ENTRY; |
| 571 | } |
| 572 | |
| 573 | SYSCTL_SETUP(sysctl_vfs_coda_setup, "sysctl vfs.coda subtree setup" ) |
| 574 | { |
| 575 | |
| 576 | sysctl_createv(clog, 0, NULL, NULL, |
| 577 | CTLFLAG_PERMANENT, |
| 578 | CTLTYPE_NODE, "coda" , |
| 579 | SYSCTL_DESCR("code vfs options" ), |
| 580 | NULL, 0, NULL, 0, |
| 581 | CTL_VFS, 18, CTL_EOL); |
| 582 | /* |
| 583 | * XXX the "18" above could be dynamic, thereby eliminating |
| 584 | * one more instance of the "number to vfs" mapping problem, |
| 585 | * but "18" is the order as taken from sys/mount.h |
| 586 | */ |
| 587 | |
| 588 | /* |
| 589 | sysctl_createv(clog, 0, NULL, NULL, |
| 590 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 591 | CTLTYPE_INT, "clusterread", |
| 592 | SYSCTL_DESCR( anyone? ), |
| 593 | NULL, 0, &doclusterread, 0, |
| 594 | CTL_VFS, 18, FFS_CLUSTERREAD, CTL_EOL); |
| 595 | */ |
| 596 | } |
| 597 | |
| 598 | /* |
| 599 | * To allow for greater ease of use, some vnodes may be orphaned when |
| 600 | * Venus dies. Certain operations should still be allowed to go |
| 601 | * through, but without propagating orphan-ness. So this function will |
| 602 | * get a new vnode for the file from the current run of Venus. |
| 603 | */ |
| 604 | |
| 605 | int |
| 606 | getNewVnode(struct vnode **vpp) |
| 607 | { |
| 608 | struct cfid cfid; |
| 609 | struct coda_mntinfo *mi = vftomi((*vpp)->v_mount); |
| 610 | |
| 611 | ENTRY; |
| 612 | |
| 613 | cfid.cfid_len = (short)sizeof(CodaFid); |
| 614 | cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */ |
| 615 | /* XXX ? */ |
| 616 | |
| 617 | /* We're guessing that if set, the 1st element on the list is a |
| 618 | * valid vnode to use. If not, return ENODEV as venus is dead. |
| 619 | */ |
| 620 | if (mi->mi_vfsp == NULL) |
| 621 | return ENODEV; |
| 622 | |
| 623 | return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp, |
| 624 | NULL, NULL); |
| 625 | } |
| 626 | |
| 627 | #include <ufs/ufs/quota.h> |
| 628 | #include <ufs/ufs/ufsmount.h> |
| 629 | /* get the mount structure corresponding to a given device. Assume |
| 630 | * device corresponds to a UFS. Return NULL if no device is found. |
| 631 | */ |
| 632 | struct mount *devtomp(dev_t dev) |
| 633 | { |
| 634 | struct mount *mp; |
| 635 | |
| 636 | mutex_enter(&mountlist_lock); |
| 637 | TAILQ_FOREACH(mp, &mountlist, mnt_list) { |
| 638 | if ((!strcmp(mp->mnt_op->vfs_name, MOUNT_UFS)) && |
| 639 | ((VFSTOUFS(mp))->um_dev == (dev_t) dev)) { |
| 640 | /* mount corresponds to UFS and the device matches one we want */ |
| 641 | break; |
| 642 | } |
| 643 | } |
| 644 | mutex_exit(&mountlist_lock); |
| 645 | return mp; |
| 646 | } |
| 647 | |