1 /* 2 * Copyright (c) 2000-2001, Boris Popov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Boris Popov. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.2.2.5 2003/01/17 08:20:26 tjr Exp $ 33 * $DragonFly: src/sys/vfs/smbfs/smbfs_vfsops.c,v 1.10 2004/03/01 06:33:23 dillon Exp $ 34 */ 35 #include "opt_netsmb.h" 36 #ifndef NETSMB 37 #error "SMBFS requires option NETSMB" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/proc.h> 43 #include <sys/kernel.h> 44 #include <sys/sysctl.h> 45 #include <sys/vnode.h> 46 #include <sys/mount.h> 47 #include <sys/stat.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 51 52 #include <netproto/smb/smb.h> 53 #include <netproto/smb/smb_conn.h> 54 #include <netproto/smb/smb_subr.h> 55 #include <netproto/smb/smb_dev.h> 56 57 #include "smbfs.h" 58 #include "smbfs_node.h" 59 #include "smbfs_subr.h" 60 61 #include <sys/buf.h> 62 63 int smbfs_debuglevel = 0; 64 65 static int smbfs_version = SMBFS_VERSION; 66 67 #ifdef SMBFS_USEZONE 68 #include <vm/vm.h> 69 #include <vm/vm_extern.h> 70 #include <vm/vm_zone.h> 71 72 vm_zone_t smbfsmount_zone; 73 #endif 74 75 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); 76 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 77 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 78 79 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 80 81 82 static int smbfs_mount(struct mount *, char *, caddr_t, 83 struct nameidata *, struct thread *); 84 static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 85 static int smbfs_root(struct mount *, struct vnode **); 86 static int smbfs_start(struct mount *, int, struct thread *); 87 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 88 static int smbfs_sync(struct mount *, int, struct thread *); 89 static int smbfs_unmount(struct mount *, int, struct thread *); 90 static int smbfs_init(struct vfsconf *vfsp); 91 static int smbfs_uninit(struct vfsconf *vfsp); 92 93 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 94 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 95 static int smbfs_fhtovp(struct mount *, struct fid *, 96 struct sockaddr *, struct vnode **, int *, 97 struct ucred **); 98 static int smbfs_vptofh(struct vnode *, struct fid *); 99 #endif 100 101 static struct vfsops smbfs_vfsops = { 102 smbfs_mount, 103 smbfs_start, 104 smbfs_unmount, 105 smbfs_root, 106 smbfs_quotactl, 107 smbfs_statfs, 108 smbfs_sync, 109 #if defined(__DragonFly__) || __FreeBSD_version > 400008 110 vfs_stdvget, 111 vfs_stdfhtovp, /* shouldn't happen */ 112 vfs_stdcheckexp, 113 vfs_stdvptofh, /* shouldn't happen */ 114 #else 115 smbfs_vget, 116 smbfs_fhtovp, 117 smbfs_vptofh, 118 #endif 119 smbfs_init, 120 smbfs_uninit, 121 vfs_stdextattrctl 122 }; 123 124 125 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 126 127 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 128 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 129 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 130 131 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 132 133 static int 134 smbfs_mount(struct mount *mp, char *path, caddr_t data, 135 struct nameidata *ndp, struct thread *td) 136 { 137 struct smbfs_args args; /* will hold data from mount request */ 138 struct smbmount *smp = NULL; 139 struct smb_vc *vcp; 140 struct smb_share *ssp = NULL; 141 struct vnode *vp; 142 struct smb_cred scred; 143 struct ucred *cred; 144 size_t size; 145 int error; 146 char *pc, *pe; 147 148 KKASSERT(td->td_proc); 149 cred = td->td_proc->p_ucred; 150 151 if (data == NULL) { 152 printf("missing data argument\n"); 153 return EINVAL; 154 } 155 if (mp->mnt_flag & MNT_UPDATE) { 156 printf("MNT_UPDATE not implemented"); 157 return EOPNOTSUPP; 158 } 159 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 160 if (error) 161 return error; 162 if (args.version != SMBFS_VERSION) { 163 printf("mount version mismatch: kernel=%d, mount=%d\n", 164 SMBFS_VERSION, args.version); 165 return EINVAL; 166 } 167 smb_makescred(&scred, td, cred); 168 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 169 if (error) { 170 printf("invalid device handle %d (%d)\n", args.dev, error); 171 return error; 172 } 173 vcp = SSTOVC(ssp); 174 smb_share_unlock(ssp, 0, td); 175 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 176 177 #ifdef SMBFS_USEZONE 178 smp = zalloc(smbfsmount_zone); 179 #else 180 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 181 #endif 182 if (smp == NULL) { 183 printf("could not alloc smbmount\n"); 184 error = ENOMEM; 185 goto bad; 186 } 187 bzero(smp, sizeof(*smp)); 188 mp->mnt_data = (qaddr_t)smp; 189 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 190 if (smp->sm_hash == NULL) 191 goto bad; 192 lockinit(&smp->sm_hashlock, 0, "smbfsh", 0, 0); 193 smp->sm_share = ssp; 194 smp->sm_root = NULL; 195 smp->sm_args = args; 196 smp->sm_caseopt = args.caseopt; 197 smp->sm_args.file_mode = (smp->sm_args.file_mode & 198 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 199 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 200 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 201 202 /* simple_lock_init(&smp->sm_npslock);*/ 203 error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 204 if (error) 205 goto bad; 206 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 207 pc = mp->mnt_stat.f_mntfromname; 208 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 209 bzero(pc, MNAMELEN); 210 *pc++ = '/'; 211 *pc++ = '/'; 212 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 213 if (pc < pe-1) { 214 *(pc++) = '@'; 215 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 216 if (pc < pe - 1) { 217 *(pc++) = '/'; 218 strncpy(pc, ssp->ss_name, pe - pc - 2); 219 } 220 } 221 /* protect against invalid mount points */ 222 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 223 vfs_getnewfsid(mp); 224 error = smbfs_root(mp, &vp); 225 if (error) 226 goto bad; 227 VOP_UNLOCK(vp, NULL, 0, td); 228 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 229 230 #ifdef DIAGNOSTICS 231 SMBERROR("mp=%p\n", mp); 232 #endif 233 return error; 234 bad: 235 if (smp) { 236 if (smp->sm_hash) 237 free(smp->sm_hash, M_SMBFSHASH); 238 lockdestroy(&smp->sm_hashlock); 239 #ifdef SMBFS_USEZONE 240 zfree(smbfsmount_zone, smp); 241 #else 242 free(smp, M_SMBFSDATA); 243 #endif 244 } 245 if (ssp) 246 smb_share_put(ssp, &scred); 247 return error; 248 } 249 250 /* Unmount the filesystem described by mp. */ 251 static int 252 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 253 { 254 struct smbmount *smp = VFSTOSMBFS(mp); 255 struct smb_cred scred; 256 struct ucred *cred; 257 int error, flags; 258 259 KKASSERT(td->td_proc); 260 cred = td->td_proc->p_ucred; 261 262 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 263 flags = 0; 264 if (mntflags & MNT_FORCE) 265 flags |= FORCECLOSE; 266 /* 267 * Keep trying to flush the vnode list for the mount while 268 * some are still busy and we are making progress towards 269 * making them not busy. This is needed because smbfs vnodes 270 * reference their parent directory but may appear after their 271 * parent in the list; one pass over the vnode list is not 272 * sufficient in this case. 273 */ 274 do { 275 smp->sm_didrele = 0; 276 /* There is 1 extra root vnode reference from smbfs_mount(). */ 277 error = vflush(mp, 1, flags); 278 } while (error == EBUSY && smp->sm_didrele != 0); 279 if (error) 280 return error; 281 smb_makescred(&scred, td, cred); 282 smb_share_put(smp->sm_share, &scred); 283 mp->mnt_data = (qaddr_t)0; 284 285 if (smp->sm_hash) 286 free(smp->sm_hash, M_SMBFSHASH); 287 lockdestroy(&smp->sm_hashlock); 288 #ifdef SMBFS_USEZONE 289 zfree(smbfsmount_zone, smp); 290 #else 291 free(smp, M_SMBFSDATA); 292 #endif 293 mp->mnt_flag &= ~MNT_LOCAL; 294 return error; 295 } 296 297 /* 298 * Return locked root vnode of a filesystem 299 */ 300 static int 301 smbfs_root(struct mount *mp, struct vnode **vpp) 302 { 303 struct thread *td = curthread; /* XXX */ 304 struct smbmount *smp = VFSTOSMBFS(mp); 305 struct vnode *vp; 306 struct smbnode *np; 307 struct smbfattr fattr; 308 struct ucred *cred; 309 struct smb_cred scred; 310 int error; 311 312 KKASSERT(td->td_proc); 313 cred = td->td_proc->p_ucred; 314 315 if (smp == NULL) { 316 SMBERROR("smp == NULL (bug in umount)\n"); 317 return EINVAL; 318 } 319 if (smp->sm_root) { 320 *vpp = SMBTOV(smp->sm_root); 321 return vget(*vpp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 322 } 323 smb_makescred(&scred, td, cred); 324 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 325 if (error) 326 return error; 327 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 328 if (error) 329 return error; 330 vp->v_flag |= VROOT; 331 np = VTOSMB(vp); 332 smp->sm_root = np; 333 *vpp = vp; 334 return 0; 335 } 336 337 /* 338 * Vfs start routine, a no-op. 339 */ 340 /* ARGSUSED */ 341 static int 342 smbfs_start(mp, flags, td) 343 struct mount *mp; 344 int flags; 345 struct thread *td; 346 { 347 SMBVDEBUG("flags=%04x\n", flags); 348 return 0; 349 } 350 351 /* 352 * Do operations associated with quotas, not supported 353 */ 354 /* ARGSUSED */ 355 static int 356 smbfs_quotactl(mp, cmd, uid, arg, td) 357 struct mount *mp; 358 int cmd; 359 uid_t uid; 360 caddr_t arg; 361 struct thread *td; 362 { 363 SMBVDEBUG("return EOPNOTSUPP\n"); 364 return EOPNOTSUPP; 365 } 366 367 /*ARGSUSED*/ 368 int 369 smbfs_init(struct vfsconf *vfsp) 370 { 371 smb_checksmp(); 372 373 #ifdef SMBFS_USEZONE 374 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 375 #endif 376 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 377 SMBVDEBUG("done.\n"); 378 return 0; 379 } 380 381 /*ARGSUSED*/ 382 int 383 smbfs_uninit(struct vfsconf *vfsp) 384 { 385 386 SMBVDEBUG("done.\n"); 387 return 0; 388 } 389 390 /* 391 * smbfs_statfs call 392 */ 393 int 394 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 395 { 396 struct smbmount *smp = VFSTOSMBFS(mp); 397 struct smbnode *np = smp->sm_root; 398 struct smb_share *ssp = smp->sm_share; 399 struct smb_cred scred; 400 struct ucred *cred; 401 int error = 0; 402 403 KKASSERT(td->td_proc); 404 cred = td->td_proc->p_ucred; 405 406 if (np == NULL) 407 return EINVAL; 408 409 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 410 sbp->f_spare2 = 0; /* placeholder */ 411 smb_makescred(&scred, td, cred); 412 413 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 414 error = smbfs_smb_statfs2(ssp, sbp, &scred); 415 else 416 error = smbfs_smb_statfs(ssp, sbp, &scred); 417 if (error) 418 return error; 419 sbp->f_flags = 0; /* copy of mount exported flags */ 420 if (sbp != &mp->mnt_stat) { 421 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 422 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 423 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 424 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 425 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 426 } 427 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 428 return 0; 429 } 430 431 /* 432 * Flush out the buffer cache 433 */ 434 /* ARGSUSED */ 435 static int 436 smbfs_sync(mp, waitfor, td) 437 struct mount *mp; 438 int waitfor; 439 struct thread *td; 440 { 441 struct vnode *vp; 442 int error, allerror = 0; 443 /* 444 * Force stale buffer cache information to be flushed. 445 */ 446 loop: 447 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 448 vp != NULL; 449 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 450 if (vp->v_flag & VPLACEMARKER) /* ZZZ */ 451 continue; 452 /* 453 * If the vnode that we are about to sync is no longer 454 * associated with this mount point, start over. 455 */ 456 if (vp->v_mount != mp) 457 goto loop; 458 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 459 waitfor == MNT_LAZY) 460 continue; 461 if (vget(vp, NULL, LK_EXCLUSIVE, td)) 462 goto loop; 463 error = VOP_FSYNC(vp, waitfor, td); 464 if (error) 465 allerror = error; 466 vput(vp); 467 } 468 return (allerror); 469 } 470 471 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 472 /* 473 * smbfs flat namespace lookup. Unsupported. 474 */ 475 /* ARGSUSED */ 476 static int smbfs_vget(mp, ino, vpp) 477 struct mount *mp; 478 ino_t ino; 479 struct vnode **vpp; 480 { 481 return (EOPNOTSUPP); 482 } 483 484 /* ARGSUSED */ 485 static int smbfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 486 struct mount *mp; 487 struct fid *fhp; 488 struct sockaddr *nam; 489 struct vnode **vpp; 490 int *exflagsp; 491 struct ucred **credanonp; 492 { 493 return (EINVAL); 494 } 495 496 /* 497 * Vnode pointer to File handle, should never happen either 498 */ 499 /* ARGSUSED */ 500 static int 501 smbfs_vptofh(vp, fhp) 502 struct vnode *vp; 503 struct fid *fhp; 504 { 505 return (EINVAL); 506 } 507 508 #endif /* __FreeBSD_version < 400009 */ 509