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 1.13 2004/08/17 18:57:35 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 extern struct vnodeopv_entry_desc smbfs_vnodeop_entries[]; 64 65 int smbfs_debuglevel = 0; 66 67 static int smbfs_version = SMBFS_VERSION; 68 69 #ifdef SMBFS_USEZONE 70 #include <vm/vm.h> 71 #include <vm/vm_extern.h> 72 #include <vm/vm_zone.h> 73 74 vm_zone_t smbfsmount_zone; 75 #endif 76 77 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); 78 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 79 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 80 81 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 82 83 84 static int smbfs_mount(struct mount *, char *, caddr_t, 85 struct nameidata *, struct thread *); 86 static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 87 static int smbfs_root(struct mount *, struct vnode **); 88 static int smbfs_start(struct mount *, int, struct thread *); 89 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 90 static int smbfs_sync(struct mount *, int, struct thread *); 91 static int smbfs_unmount(struct mount *, int, struct thread *); 92 static int smbfs_init(struct vfsconf *vfsp); 93 static int smbfs_uninit(struct vfsconf *vfsp); 94 95 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 96 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 97 static int smbfs_fhtovp(struct mount *, struct fid *, 98 struct sockaddr *, struct vnode **, int *, 99 struct ucred **); 100 static int smbfs_vptofh(struct vnode *, struct fid *); 101 #endif 102 103 static struct vfsops smbfs_vfsops = { 104 smbfs_mount, 105 smbfs_start, 106 smbfs_unmount, 107 smbfs_root, 108 smbfs_quotactl, 109 smbfs_statfs, 110 smbfs_sync, 111 #if defined(__DragonFly__) || __FreeBSD_version > 400008 112 vfs_stdvget, 113 vfs_stdfhtovp, /* shouldn't happen */ 114 vfs_stdcheckexp, 115 vfs_stdvptofh, /* shouldn't happen */ 116 #else 117 smbfs_vget, 118 smbfs_fhtovp, 119 smbfs_vptofh, 120 #endif 121 smbfs_init, 122 smbfs_uninit, 123 vfs_stdextattrctl 124 }; 125 126 127 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 128 129 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 130 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 131 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 132 133 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 134 135 static int 136 smbfs_mount(struct mount *mp, char *path, caddr_t data, 137 struct nameidata *ndp, struct thread *td) 138 { 139 struct smbfs_args args; /* will hold data from mount request */ 140 struct smbmount *smp = NULL; 141 struct smb_vc *vcp; 142 struct smb_share *ssp = NULL; 143 struct vnode *vp; 144 struct smb_cred scred; 145 struct ucred *cred; 146 size_t size; 147 int error; 148 char *pc, *pe; 149 150 KKASSERT(td->td_proc); 151 cred = td->td_proc->p_ucred; 152 153 if (data == NULL) { 154 printf("missing data argument\n"); 155 return EINVAL; 156 } 157 if (mp->mnt_flag & MNT_UPDATE) { 158 printf("MNT_UPDATE not implemented"); 159 return EOPNOTSUPP; 160 } 161 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 162 if (error) 163 return error; 164 if (args.version != SMBFS_VERSION) { 165 printf("mount version mismatch: kernel=%d, mount=%d\n", 166 SMBFS_VERSION, args.version); 167 return EINVAL; 168 } 169 smb_makescred(&scred, td, cred); 170 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 171 if (error) { 172 printf("invalid device handle %d (%d)\n", args.dev, error); 173 return error; 174 } 175 vcp = SSTOVC(ssp); 176 smb_share_unlock(ssp, 0, td); 177 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 178 179 #ifdef SMBFS_USEZONE 180 smp = zalloc(smbfsmount_zone); 181 #else 182 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 183 #endif 184 if (smp == NULL) { 185 printf("could not alloc smbmount\n"); 186 error = ENOMEM; 187 goto bad; 188 } 189 bzero(smp, sizeof(*smp)); 190 mp->mnt_data = (qaddr_t)smp; 191 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 192 if (smp->sm_hash == NULL) 193 goto bad; 194 lockinit(&smp->sm_hashlock, 0, "smbfsh", 0, 0); 195 smp->sm_share = ssp; 196 smp->sm_root = NULL; 197 smp->sm_args = args; 198 smp->sm_caseopt = args.caseopt; 199 smp->sm_args.file_mode = (smp->sm_args.file_mode & 200 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 201 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 202 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 203 204 /* simple_lock_init(&smp->sm_npslock);*/ 205 error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 206 if (error) 207 goto bad; 208 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 209 pc = mp->mnt_stat.f_mntfromname; 210 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 211 bzero(pc, MNAMELEN); 212 *pc++ = '/'; 213 *pc++ = '/'; 214 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 215 if (pc < pe-1) { 216 *(pc++) = '@'; 217 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 218 if (pc < pe - 1) { 219 *(pc++) = '/'; 220 strncpy(pc, ssp->ss_name, pe - pc - 2); 221 } 222 } 223 /* protect against invalid mount points */ 224 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 225 vfs_getnewfsid(mp); 226 227 vfs_add_vnodeops(&mp->mnt_vn_ops, smbfs_vnodeop_entries); 228 229 error = smbfs_root(mp, &vp); 230 if (error) 231 goto bad; 232 VOP_UNLOCK(vp, NULL, 0, td); 233 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 234 235 #ifdef DIAGNOSTICS 236 SMBERROR("mp=%p\n", mp); 237 #endif 238 return error; 239 bad: 240 if (smp) { 241 if (smp->sm_hash) 242 free(smp->sm_hash, M_SMBFSHASH); 243 lockdestroy(&smp->sm_hashlock); 244 #ifdef SMBFS_USEZONE 245 zfree(smbfsmount_zone, smp); 246 #else 247 free(smp, M_SMBFSDATA); 248 #endif 249 } 250 if (ssp) 251 smb_share_put(ssp, &scred); 252 return error; 253 } 254 255 /* Unmount the filesystem described by mp. */ 256 static int 257 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 258 { 259 struct smbmount *smp = VFSTOSMBFS(mp); 260 struct smb_cred scred; 261 struct ucred *cred; 262 int error, flags; 263 264 KKASSERT(td->td_proc); 265 cred = td->td_proc->p_ucred; 266 267 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 268 flags = 0; 269 if (mntflags & MNT_FORCE) 270 flags |= FORCECLOSE; 271 /* 272 * Keep trying to flush the vnode list for the mount while 273 * some are still busy and we are making progress towards 274 * making them not busy. This is needed because smbfs vnodes 275 * reference their parent directory but may appear after their 276 * parent in the list; one pass over the vnode list is not 277 * sufficient in this case. 278 */ 279 do { 280 smp->sm_didrele = 0; 281 /* There is 1 extra root vnode reference from smbfs_mount(). */ 282 error = vflush(mp, 1, flags); 283 } while (error == EBUSY && smp->sm_didrele != 0); 284 if (error) 285 return error; 286 smb_makescred(&scred, td, cred); 287 smb_share_put(smp->sm_share, &scred); 288 mp->mnt_data = (qaddr_t)0; 289 290 if (smp->sm_hash) 291 free(smp->sm_hash, M_SMBFSHASH); 292 lockdestroy(&smp->sm_hashlock); 293 #ifdef SMBFS_USEZONE 294 zfree(smbfsmount_zone, smp); 295 #else 296 free(smp, M_SMBFSDATA); 297 #endif 298 mp->mnt_flag &= ~MNT_LOCAL; 299 return error; 300 } 301 302 /* 303 * Return locked root vnode of a filesystem 304 */ 305 static int 306 smbfs_root(struct mount *mp, struct vnode **vpp) 307 { 308 struct thread *td = curthread; /* XXX */ 309 struct smbmount *smp = VFSTOSMBFS(mp); 310 struct vnode *vp; 311 struct smbnode *np; 312 struct smbfattr fattr; 313 struct ucred *cred; 314 struct smb_cred scred; 315 int error; 316 317 KKASSERT(td->td_proc); 318 cred = td->td_proc->p_ucred; 319 320 if (smp == NULL) { 321 SMBERROR("smp == NULL (bug in umount)\n"); 322 return EINVAL; 323 } 324 if (smp->sm_root) { 325 *vpp = SMBTOV(smp->sm_root); 326 return vget(*vpp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 327 } 328 smb_makescred(&scred, td, cred); 329 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 330 if (error) 331 return error; 332 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 333 if (error) 334 return error; 335 vp->v_flag |= VROOT; 336 np = VTOSMB(vp); 337 smp->sm_root = np; 338 *vpp = vp; 339 return 0; 340 } 341 342 /* 343 * Vfs start routine, a no-op. 344 */ 345 /* ARGSUSED */ 346 static int 347 smbfs_start(struct mount *mp, int flags, struct thread *td) 348 { 349 SMBVDEBUG("flags=%04x\n", flags); 350 return 0; 351 } 352 353 /* 354 * Do operations associated with quotas, not supported 355 */ 356 /* ARGSUSED */ 357 static int 358 smbfs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, 359 struct thread *td) 360 { 361 SMBVDEBUG("return EOPNOTSUPP\n"); 362 return EOPNOTSUPP; 363 } 364 365 /*ARGSUSED*/ 366 int 367 smbfs_init(struct vfsconf *vfsp) 368 { 369 #ifdef SMBFS_USEZONE 370 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 371 #endif 372 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 373 SMBVDEBUG("done.\n"); 374 return 0; 375 } 376 377 /*ARGSUSED*/ 378 int 379 smbfs_uninit(struct vfsconf *vfsp) 380 { 381 SMBVDEBUG("done.\n"); 382 return 0; 383 } 384 385 /* 386 * smbfs_statfs call 387 */ 388 int 389 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 390 { 391 struct smbmount *smp = VFSTOSMBFS(mp); 392 struct smbnode *np = smp->sm_root; 393 struct smb_share *ssp = smp->sm_share; 394 struct smb_cred scred; 395 struct ucred *cred; 396 int error = 0; 397 398 KKASSERT(td->td_proc); 399 cred = td->td_proc->p_ucred; 400 401 if (np == NULL) 402 return EINVAL; 403 404 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 405 sbp->f_spare2 = 0; /* placeholder */ 406 smb_makescred(&scred, td, cred); 407 408 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 409 error = smbfs_smb_statfs2(ssp, sbp, &scred); 410 else 411 error = smbfs_smb_statfs(ssp, sbp, &scred); 412 if (error) 413 return error; 414 sbp->f_flags = 0; /* copy of mount exported flags */ 415 if (sbp != &mp->mnt_stat) { 416 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 417 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 418 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 419 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 420 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 421 } 422 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 423 return 0; 424 } 425 426 /* 427 * Flush out the buffer cache 428 */ 429 /* ARGSUSED */ 430 static int 431 smbfs_sync(struct mount *mp, int waitfor, struct thread *td) 432 { 433 struct vnode *vp; 434 int error, allerror = 0; 435 /* 436 * Force stale buffer cache information to be flushed. 437 */ 438 loop: 439 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 440 vp != NULL; 441 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 442 if (vp->v_flag & VPLACEMARKER) /* ZZZ */ 443 continue; 444 /* 445 * If the vnode that we are about to sync is no longer 446 * associated with this mount point, start over. 447 */ 448 if (vp->v_mount != mp) 449 goto loop; 450 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 451 waitfor == MNT_LAZY) 452 continue; 453 if (vget(vp, NULL, LK_EXCLUSIVE, td)) 454 goto loop; 455 error = VOP_FSYNC(vp, waitfor, td); 456 if (error) 457 allerror = error; 458 vput(vp); 459 } 460 return (allerror); 461 } 462 463 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 464 /* 465 * smbfs flat namespace lookup. Unsupported. 466 */ 467 /* ARGSUSED */ 468 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 469 { 470 return (EOPNOTSUPP); 471 } 472 473 /* ARGSUSED */ 474 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 475 struct sockaddr *nam, struct vnode **vpp, 476 int *exflagsp, struct ucred **credanonp) 477 { 478 return (EINVAL); 479 } 480 481 /* 482 * Vnode pointer to File handle, should never happen either 483 */ 484 /* ARGSUSED */ 485 static int 486 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 487 { 488 return (EINVAL); 489 } 490 491 #endif /* __FreeBSD_version < 400009 */ 492