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 1.18 2005/02/12 01:32:49 joerg 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 int error; 145 char *pc, *pe; 146 147 KKASSERT(td->td_proc); 148 cred = td->td_proc->p_ucred; 149 150 if (data == NULL) { 151 printf("missing data argument\n"); 152 return EINVAL; 153 } 154 if (mp->mnt_flag & MNT_UPDATE) { 155 printf("MNT_UPDATE not implemented"); 156 return EOPNOTSUPP; 157 } 158 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 159 if (error) 160 return error; 161 if (args.version != SMBFS_VERSION) { 162 printf("mount version mismatch: kernel=%d, mount=%d\n", 163 SMBFS_VERSION, args.version); 164 return EINVAL; 165 } 166 smb_makescred(&scred, td, cred); 167 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 168 if (error) { 169 printf("invalid device handle %d (%d)\n", args.dev, error); 170 return error; 171 } 172 vcp = SSTOVC(ssp); 173 smb_share_unlock(ssp, 0, td); 174 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 175 176 #ifdef SMBFS_USEZONE 177 smp = zalloc(smbfsmount_zone); 178 #else 179 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 180 #endif 181 if (smp == NULL) { 182 printf("could not alloc smbmount\n"); 183 error = ENOMEM; 184 goto bad; 185 } 186 bzero(smp, sizeof(*smp)); 187 mp->mnt_data = (qaddr_t)smp; 188 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 189 if (smp->sm_hash == NULL) 190 goto bad; 191 lockinit(&smp->sm_hashlock, 0, "smbfsh", 0, 0); 192 smp->sm_share = ssp; 193 smp->sm_root = NULL; 194 smp->sm_args = args; 195 smp->sm_caseopt = args.caseopt; 196 smp->sm_args.file_mode = (smp->sm_args.file_mode & 197 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 198 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 199 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 200 201 /* simple_lock_init(&smp->sm_npslock);*/ 202 pc = mp->mnt_stat.f_mntfromname; 203 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 204 bzero(pc, MNAMELEN); 205 *pc++ = '/'; 206 *pc++ = '/'; 207 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 208 if (pc < pe-1) { 209 *(pc++) = '@'; 210 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 211 if (pc < pe - 1) { 212 *(pc++) = '/'; 213 strncpy(pc, ssp->ss_name, pe - pc - 2); 214 } 215 } 216 /* protect against invalid mount points */ 217 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 218 vfs_getnewfsid(mp); 219 220 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, smbfs_vnodeop_entries); 221 222 error = smbfs_root(mp, &vp); 223 if (error) 224 goto bad; 225 VOP_UNLOCK(vp, 0, td); 226 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 227 228 #ifdef DIAGNOSTICS 229 SMBERROR("mp=%p\n", mp); 230 #endif 231 return error; 232 bad: 233 if (smp) { 234 if (smp->sm_hash) 235 free(smp->sm_hash, M_SMBFSHASH); 236 lockdestroy(&smp->sm_hashlock); 237 #ifdef SMBFS_USEZONE 238 zfree(smbfsmount_zone, smp); 239 #else 240 free(smp, M_SMBFSDATA); 241 #endif 242 } 243 if (ssp) 244 smb_share_put(ssp, &scred); 245 return error; 246 } 247 248 /* Unmount the filesystem described by mp. */ 249 static int 250 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 251 { 252 struct smbmount *smp = VFSTOSMBFS(mp); 253 struct smb_cred scred; 254 struct ucred *cred; 255 int error, flags; 256 257 KKASSERT(td->td_proc); 258 cred = td->td_proc->p_ucred; 259 260 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 261 flags = 0; 262 if (mntflags & MNT_FORCE) 263 flags |= FORCECLOSE; 264 /* 265 * Keep trying to flush the vnode list for the mount while 266 * some are still busy and we are making progress towards 267 * making them not busy. This is needed because smbfs vnodes 268 * reference their parent directory but may appear after their 269 * parent in the list; one pass over the vnode list is not 270 * sufficient in this case. 271 */ 272 do { 273 smp->sm_didrele = 0; 274 /* There is 1 extra root vnode reference from smbfs_mount(). */ 275 error = vflush(mp, 1, flags); 276 } while (error == EBUSY && smp->sm_didrele != 0); 277 if (error) 278 return error; 279 smb_makescred(&scred, td, cred); 280 smb_share_put(smp->sm_share, &scred); 281 mp->mnt_data = (qaddr_t)0; 282 283 if (smp->sm_hash) 284 free(smp->sm_hash, M_SMBFSHASH); 285 lockdestroy(&smp->sm_hashlock); 286 #ifdef SMBFS_USEZONE 287 zfree(smbfsmount_zone, smp); 288 #else 289 free(smp, M_SMBFSDATA); 290 #endif 291 mp->mnt_flag &= ~MNT_LOCAL; 292 return error; 293 } 294 295 /* 296 * Return locked root vnode of a filesystem 297 */ 298 static int 299 smbfs_root(struct mount *mp, struct vnode **vpp) 300 { 301 struct thread *td = curthread; /* XXX */ 302 struct smbmount *smp = VFSTOSMBFS(mp); 303 struct vnode *vp; 304 struct smbnode *np; 305 struct smbfattr fattr; 306 struct ucred *cred; 307 struct smb_cred scred; 308 int error; 309 310 KKASSERT(td->td_proc); 311 cred = td->td_proc->p_ucred; 312 313 if (smp == NULL) { 314 SMBERROR("smp == NULL (bug in umount)\n"); 315 return EINVAL; 316 } 317 if (smp->sm_root) { 318 *vpp = SMBTOV(smp->sm_root); 319 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 320 } 321 smb_makescred(&scred, td, cred); 322 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 323 if (error) 324 return error; 325 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 326 if (error) 327 return error; 328 vp->v_flag |= VROOT; 329 np = VTOSMB(vp); 330 smp->sm_root = np; 331 *vpp = vp; 332 return 0; 333 } 334 335 /* 336 * Vfs start routine, a no-op. 337 */ 338 /* ARGSUSED */ 339 static int 340 smbfs_start(struct mount *mp, int flags, struct thread *td) 341 { 342 SMBVDEBUG("flags=%04x\n", flags); 343 return 0; 344 } 345 346 /* 347 * Do operations associated with quotas, not supported 348 */ 349 /* ARGSUSED */ 350 static int 351 smbfs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, 352 struct thread *td) 353 { 354 SMBVDEBUG("return EOPNOTSUPP\n"); 355 return EOPNOTSUPP; 356 } 357 358 /*ARGSUSED*/ 359 int 360 smbfs_init(struct vfsconf *vfsp) 361 { 362 #ifdef SMBFS_USEZONE 363 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 364 #endif 365 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 366 SMBVDEBUG("done.\n"); 367 return 0; 368 } 369 370 /*ARGSUSED*/ 371 int 372 smbfs_uninit(struct vfsconf *vfsp) 373 { 374 SMBVDEBUG("done.\n"); 375 return 0; 376 } 377 378 /* 379 * smbfs_statfs call 380 */ 381 int 382 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 383 { 384 struct smbmount *smp = VFSTOSMBFS(mp); 385 struct smbnode *np = smp->sm_root; 386 struct smb_share *ssp = smp->sm_share; 387 struct smb_cred scred; 388 struct ucred *cred; 389 int error = 0; 390 391 KKASSERT(td->td_proc); 392 cred = td->td_proc->p_ucred; 393 394 if (np == NULL) 395 return EINVAL; 396 397 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 398 sbp->f_spare2 = 0; /* placeholder */ 399 smb_makescred(&scred, td, cred); 400 401 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 402 error = smbfs_smb_statfs2(ssp, sbp, &scred); 403 else 404 error = smbfs_smb_statfs(ssp, sbp, &scred); 405 if (error) 406 return error; 407 sbp->f_flags = 0; /* copy of mount exported flags */ 408 if (sbp != &mp->mnt_stat) { 409 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 410 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 411 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 412 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 413 } 414 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 415 return 0; 416 } 417 418 /* 419 * Flush out the buffer cache 420 */ 421 /* ARGSUSED */ 422 static int 423 smbfs_sync(struct mount *mp, int waitfor, struct thread *td) 424 { 425 struct vnode *vp; 426 int error, allerror = 0; 427 /* 428 * Force stale buffer cache information to be flushed. 429 */ 430 loop: 431 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 432 vp != NULL; 433 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 434 if (vp->v_flag & VPLACEMARKER) /* ZZZ */ 435 continue; 436 /* 437 * If the vnode that we are about to sync is no longer 438 * associated with this mount point, start over. 439 */ 440 if (vp->v_mount != mp) 441 goto loop; 442 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 443 waitfor == MNT_LAZY) 444 continue; 445 if (vget(vp, LK_EXCLUSIVE, td)) 446 goto loop; 447 error = VOP_FSYNC(vp, waitfor, td); 448 if (error) 449 allerror = error; 450 vput(vp); 451 } 452 return (allerror); 453 } 454 455 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 456 /* 457 * smbfs flat namespace lookup. Unsupported. 458 */ 459 /* ARGSUSED */ 460 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 461 { 462 return (EOPNOTSUPP); 463 } 464 465 /* ARGSUSED */ 466 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 467 struct sockaddr *nam, struct vnode **vpp, 468 int *exflagsp, struct ucred **credanonp) 469 { 470 return (EINVAL); 471 } 472 473 /* 474 * Vnode pointer to File handle, should never happen either 475 */ 476 /* ARGSUSED */ 477 static int 478 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 479 { 480 return (EINVAL); 481 } 482 483 #endif /* __FreeBSD_version < 400009 */ 484