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 1.21 2005/06/06 15:35:09 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 int error; 145 char *pc, *pe; 146 147 if (td->td_proc) 148 cred = td->td_proc->p_ucred; 149 else 150 cred = proc0.p_ucred; 151 152 if (data == NULL) { 153 printf("missing data argument\n"); 154 return EINVAL; 155 } 156 if (mp->mnt_flag & MNT_UPDATE) { 157 printf("MNT_UPDATE not implemented"); 158 return EOPNOTSUPP; 159 } 160 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 161 if (error) 162 return error; 163 if (args.version != SMBFS_VERSION) { 164 printf("mount version mismatch: kernel=%d, mount=%d\n", 165 SMBFS_VERSION, args.version); 166 return EINVAL; 167 } 168 smb_makescred(&scred, td, cred); 169 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 170 if (error) { 171 printf("invalid device handle %d (%d)\n", args.dev, error); 172 return error; 173 } 174 vcp = SSTOVC(ssp); 175 smb_share_unlock(ssp, 0, td); 176 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 177 178 #ifdef SMBFS_USEZONE 179 smp = zalloc(smbfsmount_zone); 180 #else 181 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 182 #endif 183 if (smp == NULL) { 184 printf("could not alloc smbmount\n"); 185 error = ENOMEM; 186 goto bad; 187 } 188 bzero(smp, sizeof(*smp)); 189 mp->mnt_data = (qaddr_t)smp; 190 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 191 if (smp->sm_hash == NULL) 192 goto bad; 193 lockinit(&smp->sm_hashlock, 0, "smbfsh", 0, 0); 194 smp->sm_share = ssp; 195 smp->sm_root = NULL; 196 smp->sm_args = args; 197 smp->sm_caseopt = args.caseopt; 198 smp->sm_args.file_mode = (smp->sm_args.file_mode & 199 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 200 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 201 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 202 203 /* simple_lock_init(&smp->sm_npslock);*/ 204 pc = mp->mnt_stat.f_mntfromname; 205 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 206 bzero(pc, MNAMELEN); 207 *pc++ = '/'; 208 *pc++ = '/'; 209 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 210 if (pc < pe-1) { 211 *(pc++) = '@'; 212 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 213 if (pc < pe - 1) { 214 *(pc++) = '/'; 215 strncpy(pc, ssp->ss_name, pe - pc - 2); 216 } 217 } 218 /* protect against invalid mount points */ 219 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 220 vfs_getnewfsid(mp); 221 222 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, smbfs_vnodeop_entries); 223 224 error = smbfs_root(mp, &vp); 225 if (error) 226 goto bad; 227 VOP_UNLOCK(vp, 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 if (td->td_proc) 260 cred = td->td_proc->p_ucred; 261 else 262 cred = proc0.p_ucred; 263 264 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 265 flags = 0; 266 if (mntflags & MNT_FORCE) 267 flags |= FORCECLOSE; 268 /* 269 * Keep trying to flush the vnode list for the mount while 270 * some are still busy and we are making progress towards 271 * making them not busy. This is needed because smbfs vnodes 272 * reference their parent directory but may appear after their 273 * parent in the list; one pass over the vnode list is not 274 * sufficient in this case. 275 */ 276 do { 277 smp->sm_didrele = 0; 278 /* There is 1 extra root vnode reference from smbfs_mount(). */ 279 error = vflush(mp, 1, flags); 280 } while (error == EBUSY && smp->sm_didrele != 0); 281 if (error) 282 return error; 283 smb_makescred(&scred, td, cred); 284 smb_share_put(smp->sm_share, &scred); 285 mp->mnt_data = (qaddr_t)0; 286 287 if (smp->sm_hash) 288 free(smp->sm_hash, M_SMBFSHASH); 289 lockdestroy(&smp->sm_hashlock); 290 #ifdef SMBFS_USEZONE 291 zfree(smbfsmount_zone, smp); 292 #else 293 free(smp, M_SMBFSDATA); 294 #endif 295 mp->mnt_flag &= ~MNT_LOCAL; 296 return error; 297 } 298 299 /* 300 * Return locked root vnode of a filesystem 301 */ 302 static int 303 smbfs_root(struct mount *mp, struct vnode **vpp) 304 { 305 struct thread *td = curthread; /* XXX */ 306 struct smbmount *smp = VFSTOSMBFS(mp); 307 struct vnode *vp; 308 struct smbnode *np; 309 struct smbfattr fattr; 310 struct ucred *cred; 311 struct smb_cred scred; 312 int error; 313 314 if (smp == NULL) { 315 SMBERROR("smp == NULL (bug in umount)\n"); 316 return EINVAL; 317 } 318 if (smp->sm_root) { 319 *vpp = SMBTOV(smp->sm_root); 320 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 321 } 322 if (td->td_proc) 323 cred = td->td_proc->p_ucred; 324 else 325 cred = proc0.p_ucred; 326 327 smb_makescred(&scred, td, cred); 328 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 329 if (error) 330 return error; 331 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 332 if (error) 333 return error; 334 vp->v_flag |= VROOT; 335 np = VTOSMB(vp); 336 smp->sm_root = np; 337 *vpp = vp; 338 return 0; 339 } 340 341 /* 342 * Vfs start routine, a no-op. 343 */ 344 /* ARGSUSED */ 345 static int 346 smbfs_start(struct mount *mp, int flags, struct thread *td) 347 { 348 SMBVDEBUG("flags=%04x\n", flags); 349 return 0; 350 } 351 352 /* 353 * Do operations associated with quotas, not supported 354 */ 355 /* ARGSUSED */ 356 static int 357 smbfs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, 358 struct thread *td) 359 { 360 SMBVDEBUG("return EOPNOTSUPP\n"); 361 return EOPNOTSUPP; 362 } 363 364 /*ARGSUSED*/ 365 int 366 smbfs_init(struct vfsconf *vfsp) 367 { 368 #ifdef SMBFS_USEZONE 369 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 370 #endif 371 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 372 SMBVDEBUG("done.\n"); 373 return 0; 374 } 375 376 /*ARGSUSED*/ 377 int 378 smbfs_uninit(struct vfsconf *vfsp) 379 { 380 SMBVDEBUG("done.\n"); 381 return 0; 382 } 383 384 /* 385 * smbfs_statfs call 386 */ 387 int 388 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 389 { 390 struct smbmount *smp = VFSTOSMBFS(mp); 391 struct smbnode *np = smp->sm_root; 392 struct smb_share *ssp = smp->sm_share; 393 struct smb_cred scred; 394 struct ucred *cred; 395 int error = 0; 396 397 if (td->td_proc) 398 cred = td->td_proc->p_ucred; 399 else 400 cred = proc0.p_ucred; 401 402 if (np == NULL) 403 return EINVAL; 404 405 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 406 sbp->f_spare2 = 0; /* placeholder */ 407 smb_makescred(&scred, td, cred); 408 409 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 410 error = smbfs_smb_statfs2(ssp, sbp, &scred); 411 else 412 error = smbfs_smb_statfs(ssp, sbp, &scred); 413 if (error) 414 return error; 415 sbp->f_flags = 0; /* copy of mount exported flags */ 416 if (sbp != &mp->mnt_stat) { 417 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 418 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 419 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 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 /* 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) || RB_EMPTY(&vp->v_rbdirty_tree) || 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