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 1.16 2004/12/17 00:18:35 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, struct thread *); 85 static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 86 static int smbfs_root(struct mount *, struct vnode **); 87 static int smbfs_start(struct mount *, int, struct thread *); 88 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 89 static int smbfs_sync(struct mount *, int, struct thread *); 90 static int smbfs_unmount(struct mount *, int, struct thread *); 91 static int smbfs_init(struct vfsconf *vfsp); 92 static int smbfs_uninit(struct vfsconf *vfsp); 93 94 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 95 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 96 static int smbfs_fhtovp(struct mount *, struct fid *, 97 struct sockaddr *, struct vnode **, int *, 98 struct ucred **); 99 static int smbfs_vptofh(struct vnode *, struct fid *); 100 #endif 101 102 static struct vfsops smbfs_vfsops = { 103 smbfs_mount, 104 smbfs_start, 105 smbfs_unmount, 106 smbfs_root, 107 smbfs_quotactl, 108 smbfs_statfs, 109 smbfs_sync, 110 #if defined(__DragonFly__) || __FreeBSD_version > 400008 111 vfs_stdvget, 112 vfs_stdfhtovp, /* shouldn't happen */ 113 vfs_stdcheckexp, 114 vfs_stdvptofh, /* shouldn't happen */ 115 #else 116 smbfs_vget, 117 smbfs_fhtovp, 118 smbfs_vptofh, 119 #endif 120 smbfs_init, 121 smbfs_uninit, 122 vfs_stdextattrctl 123 }; 124 125 126 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 127 128 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 129 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 130 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 131 132 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 133 134 static int 135 smbfs_mount(struct mount *mp, char *path, caddr_t data, 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); 224 225 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, smbfs_vnodeop_entries); 226 227 error = smbfs_root(mp, &vp); 228 if (error) 229 goto bad; 230 VOP_UNLOCK(vp, 0, td); 231 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 232 233 #ifdef DIAGNOSTICS 234 SMBERROR("mp=%p\n", mp); 235 #endif 236 return error; 237 bad: 238 if (smp) { 239 if (smp->sm_hash) 240 free(smp->sm_hash, M_SMBFSHASH); 241 lockdestroy(&smp->sm_hashlock); 242 #ifdef SMBFS_USEZONE 243 zfree(smbfsmount_zone, smp); 244 #else 245 free(smp, M_SMBFSDATA); 246 #endif 247 } 248 if (ssp) 249 smb_share_put(ssp, &scred); 250 return error; 251 } 252 253 /* Unmount the filesystem described by mp. */ 254 static int 255 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 256 { 257 struct smbmount *smp = VFSTOSMBFS(mp); 258 struct smb_cred scred; 259 struct ucred *cred; 260 int error, flags; 261 262 KKASSERT(td->td_proc); 263 cred = td->td_proc->p_ucred; 264 265 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 266 flags = 0; 267 if (mntflags & MNT_FORCE) 268 flags |= FORCECLOSE; 269 /* 270 * Keep trying to flush the vnode list for the mount while 271 * some are still busy and we are making progress towards 272 * making them not busy. This is needed because smbfs vnodes 273 * reference their parent directory but may appear after their 274 * parent in the list; one pass over the vnode list is not 275 * sufficient in this case. 276 */ 277 do { 278 smp->sm_didrele = 0; 279 /* There is 1 extra root vnode reference from smbfs_mount(). */ 280 error = vflush(mp, 1, flags); 281 } while (error == EBUSY && smp->sm_didrele != 0); 282 if (error) 283 return error; 284 smb_makescred(&scred, td, cred); 285 smb_share_put(smp->sm_share, &scred); 286 mp->mnt_data = (qaddr_t)0; 287 288 if (smp->sm_hash) 289 free(smp->sm_hash, M_SMBFSHASH); 290 lockdestroy(&smp->sm_hashlock); 291 #ifdef SMBFS_USEZONE 292 zfree(smbfsmount_zone, smp); 293 #else 294 free(smp, M_SMBFSDATA); 295 #endif 296 mp->mnt_flag &= ~MNT_LOCAL; 297 return error; 298 } 299 300 /* 301 * Return locked root vnode of a filesystem 302 */ 303 static int 304 smbfs_root(struct mount *mp, struct vnode **vpp) 305 { 306 struct thread *td = curthread; /* XXX */ 307 struct smbmount *smp = VFSTOSMBFS(mp); 308 struct vnode *vp; 309 struct smbnode *np; 310 struct smbfattr fattr; 311 struct ucred *cred; 312 struct smb_cred scred; 313 int error; 314 315 KKASSERT(td->td_proc); 316 cred = td->td_proc->p_ucred; 317 318 if (smp == NULL) { 319 SMBERROR("smp == NULL (bug in umount)\n"); 320 return EINVAL; 321 } 322 if (smp->sm_root) { 323 *vpp = SMBTOV(smp->sm_root); 324 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 325 } 326 smb_makescred(&scred, td, cred); 327 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 328 if (error) 329 return error; 330 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 331 if (error) 332 return error; 333 vp->v_flag |= VROOT; 334 np = VTOSMB(vp); 335 smp->sm_root = np; 336 *vpp = vp; 337 return 0; 338 } 339 340 /* 341 * Vfs start routine, a no-op. 342 */ 343 /* ARGSUSED */ 344 static int 345 smbfs_start(struct mount *mp, int flags, 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(struct mount *mp, int cmd, uid_t uid, caddr_t arg, 357 struct thread *td) 358 { 359 SMBVDEBUG("return EOPNOTSUPP\n"); 360 return EOPNOTSUPP; 361 } 362 363 /*ARGSUSED*/ 364 int 365 smbfs_init(struct vfsconf *vfsp) 366 { 367 #ifdef SMBFS_USEZONE 368 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 369 #endif 370 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 371 SMBVDEBUG("done.\n"); 372 return 0; 373 } 374 375 /*ARGSUSED*/ 376 int 377 smbfs_uninit(struct vfsconf *vfsp) 378 { 379 SMBVDEBUG("done.\n"); 380 return 0; 381 } 382 383 /* 384 * smbfs_statfs call 385 */ 386 int 387 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 388 { 389 struct smbmount *smp = VFSTOSMBFS(mp); 390 struct smbnode *np = smp->sm_root; 391 struct smb_share *ssp = smp->sm_share; 392 struct smb_cred scred; 393 struct ucred *cred; 394 int error = 0; 395 396 KKASSERT(td->td_proc); 397 cred = td->td_proc->p_ucred; 398 399 if (np == NULL) 400 return EINVAL; 401 402 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 403 sbp->f_spare2 = 0; /* placeholder */ 404 smb_makescred(&scred, td, cred); 405 406 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 407 error = smbfs_smb_statfs2(ssp, sbp, &scred); 408 else 409 error = smbfs_smb_statfs(ssp, sbp, &scred); 410 if (error) 411 return error; 412 sbp->f_flags = 0; /* copy of mount exported flags */ 413 if (sbp != &mp->mnt_stat) { 414 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 415 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 416 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 417 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 418 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 419 } 420 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 421 return 0; 422 } 423 424 /* 425 * Flush out the buffer cache 426 */ 427 /* ARGSUSED */ 428 static int 429 smbfs_sync(struct mount *mp, int waitfor, struct thread *td) 430 { 431 struct vnode *vp; 432 int error, allerror = 0; 433 /* 434 * Force stale buffer cache information to be flushed. 435 */ 436 loop: 437 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 438 vp != NULL; 439 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 440 if (vp->v_flag & VPLACEMARKER) /* ZZZ */ 441 continue; 442 /* 443 * If the vnode that we are about to sync is no longer 444 * associated with this mount point, start over. 445 */ 446 if (vp->v_mount != mp) 447 goto loop; 448 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 449 waitfor == MNT_LAZY) 450 continue; 451 if (vget(vp, LK_EXCLUSIVE, td)) 452 goto loop; 453 error = VOP_FSYNC(vp, waitfor, td); 454 if (error) 455 allerror = error; 456 vput(vp); 457 } 458 return (allerror); 459 } 460 461 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 462 /* 463 * smbfs flat namespace lookup. Unsupported. 464 */ 465 /* ARGSUSED */ 466 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 467 { 468 return (EOPNOTSUPP); 469 } 470 471 /* ARGSUSED */ 472 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 473 struct sockaddr *nam, struct vnode **vpp, 474 int *exflagsp, struct ucred **credanonp) 475 { 476 return (EINVAL); 477 } 478 479 /* 480 * Vnode pointer to File handle, should never happen either 481 */ 482 /* ARGSUSED */ 483 static int 484 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 485 { 486 return (EINVAL); 487 } 488 489 #endif /* __FreeBSD_version < 400009 */ 490