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 1.23 2005/09/17 07:43:12 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_root(struct mount *, struct vnode **); 86 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 87 static int smbfs_sync(struct mount *, int, struct thread *); 88 static int smbfs_unmount(struct mount *, int, struct thread *); 89 static int smbfs_init(struct vfsconf *vfsp); 90 static int smbfs_uninit(struct vfsconf *vfsp); 91 92 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 93 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 94 static int smbfs_fhtovp(struct mount *, struct fid *, 95 struct sockaddr *, struct vnode **, int *, 96 struct ucred **); 97 static int smbfs_vptofh(struct vnode *, struct fid *); 98 #endif 99 100 static struct vfsops smbfs_vfsops = { 101 .vfs_mount = smbfs_mount, 102 .vfs_unmount = smbfs_unmount, 103 .vfs_root = smbfs_root, 104 .vfs_statfs = smbfs_statfs, 105 .vfs_sync = smbfs_sync, 106 .vfs_init = smbfs_init, 107 .vfs_uninit = smbfs_uninit 108 }; 109 110 111 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 112 113 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 114 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 115 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 116 117 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 118 119 static int 120 smbfs_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) 121 { 122 struct smbfs_args args; /* will hold data from mount request */ 123 struct smbmount *smp = NULL; 124 struct smb_vc *vcp; 125 struct smb_share *ssp = NULL; 126 struct vnode *vp; 127 struct smb_cred scred; 128 struct ucred *cred; 129 int error; 130 char *pc, *pe; 131 132 if (td->td_proc) 133 cred = td->td_proc->p_ucred; 134 else 135 cred = proc0.p_ucred; 136 137 if (data == NULL) { 138 printf("missing data argument\n"); 139 return EINVAL; 140 } 141 if (mp->mnt_flag & MNT_UPDATE) { 142 printf("MNT_UPDATE not implemented"); 143 return EOPNOTSUPP; 144 } 145 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 146 if (error) 147 return error; 148 if (args.version != SMBFS_VERSION) { 149 printf("mount version mismatch: kernel=%d, mount=%d\n", 150 SMBFS_VERSION, args.version); 151 return EINVAL; 152 } 153 smb_makescred(&scred, td, cred); 154 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 155 if (error) { 156 printf("invalid device handle %d (%d)\n", args.dev, error); 157 return error; 158 } 159 vcp = SSTOVC(ssp); 160 smb_share_unlock(ssp, 0, td); 161 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 162 163 #ifdef SMBFS_USEZONE 164 smp = zalloc(smbfsmount_zone); 165 #else 166 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 167 #endif 168 if (smp == NULL) { 169 printf("could not alloc smbmount\n"); 170 error = ENOMEM; 171 goto bad; 172 } 173 bzero(smp, sizeof(*smp)); 174 mp->mnt_data = (qaddr_t)smp; 175 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 176 if (smp->sm_hash == NULL) 177 goto bad; 178 lockinit(&smp->sm_hashlock, 0, "smbfsh", 0, 0); 179 smp->sm_share = ssp; 180 smp->sm_root = NULL; 181 smp->sm_args = args; 182 smp->sm_caseopt = args.caseopt; 183 smp->sm_args.file_mode = (smp->sm_args.file_mode & 184 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 185 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 186 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 187 188 /* simple_lock_init(&smp->sm_npslock);*/ 189 pc = mp->mnt_stat.f_mntfromname; 190 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 191 bzero(pc, MNAMELEN); 192 *pc++ = '/'; 193 *pc++ = '/'; 194 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 195 if (pc < pe-1) { 196 *(pc++) = '@'; 197 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 198 if (pc < pe - 1) { 199 *(pc++) = '/'; 200 strncpy(pc, ssp->ss_name, pe - pc - 2); 201 } 202 } 203 /* protect against invalid mount points */ 204 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 205 vfs_getnewfsid(mp); 206 207 vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, 208 smbfs_vnodeop_entries, 0); 209 210 error = smbfs_root(mp, &vp); 211 if (error) 212 goto bad; 213 VOP_UNLOCK(vp, 0, td); 214 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 215 216 #ifdef DIAGNOSTICS 217 SMBERROR("mp=%p\n", mp); 218 #endif 219 return error; 220 bad: 221 if (smp) { 222 if (smp->sm_hash) 223 free(smp->sm_hash, M_SMBFSHASH); 224 lockdestroy(&smp->sm_hashlock); 225 #ifdef SMBFS_USEZONE 226 zfree(smbfsmount_zone, smp); 227 #else 228 free(smp, M_SMBFSDATA); 229 #endif 230 } 231 if (ssp) 232 smb_share_put(ssp, &scred); 233 return error; 234 } 235 236 /* Unmount the filesystem described by mp. */ 237 static int 238 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 239 { 240 struct smbmount *smp = VFSTOSMBFS(mp); 241 struct smb_cred scred; 242 struct ucred *cred; 243 int error, flags; 244 245 if (td->td_proc) 246 cred = td->td_proc->p_ucred; 247 else 248 cred = proc0.p_ucred; 249 250 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 251 flags = 0; 252 if (mntflags & MNT_FORCE) 253 flags |= FORCECLOSE; 254 /* 255 * Keep trying to flush the vnode list for the mount while 256 * some are still busy and we are making progress towards 257 * making them not busy. This is needed because smbfs vnodes 258 * reference their parent directory but may appear after their 259 * parent in the list; one pass over the vnode list is not 260 * sufficient in this case. 261 */ 262 do { 263 smp->sm_didrele = 0; 264 /* There is 1 extra root vnode reference from smbfs_mount(). */ 265 error = vflush(mp, 1, flags); 266 } while (error == EBUSY && smp->sm_didrele != 0); 267 if (error) 268 return error; 269 smb_makescred(&scred, td, cred); 270 smb_share_put(smp->sm_share, &scred); 271 mp->mnt_data = (qaddr_t)0; 272 273 if (smp->sm_hash) 274 free(smp->sm_hash, M_SMBFSHASH); 275 lockdestroy(&smp->sm_hashlock); 276 #ifdef SMBFS_USEZONE 277 zfree(smbfsmount_zone, smp); 278 #else 279 free(smp, M_SMBFSDATA); 280 #endif 281 mp->mnt_flag &= ~MNT_LOCAL; 282 return error; 283 } 284 285 /* 286 * Return locked root vnode of a filesystem 287 */ 288 static int 289 smbfs_root(struct mount *mp, struct vnode **vpp) 290 { 291 struct thread *td = curthread; /* XXX */ 292 struct smbmount *smp = VFSTOSMBFS(mp); 293 struct vnode *vp; 294 struct smbnode *np; 295 struct smbfattr fattr; 296 struct ucred *cred; 297 struct smb_cred scred; 298 int error; 299 300 if (smp == NULL) { 301 SMBERROR("smp == NULL (bug in umount)\n"); 302 return EINVAL; 303 } 304 if (smp->sm_root) { 305 *vpp = SMBTOV(smp->sm_root); 306 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 307 } 308 if (td->td_proc) 309 cred = td->td_proc->p_ucred; 310 else 311 cred = proc0.p_ucred; 312 313 smb_makescred(&scred, td, cred); 314 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 315 if (error) 316 return error; 317 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 318 if (error) 319 return error; 320 vp->v_flag |= VROOT; 321 np = VTOSMB(vp); 322 smp->sm_root = np; 323 *vpp = vp; 324 return 0; 325 } 326 327 /*ARGSUSED*/ 328 int 329 smbfs_init(struct vfsconf *vfsp) 330 { 331 #ifdef SMBFS_USEZONE 332 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 333 #endif 334 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 335 SMBVDEBUG("done.\n"); 336 return 0; 337 } 338 339 /*ARGSUSED*/ 340 int 341 smbfs_uninit(struct vfsconf *vfsp) 342 { 343 SMBVDEBUG("done.\n"); 344 return 0; 345 } 346 347 /* 348 * smbfs_statfs call 349 */ 350 int 351 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 352 { 353 struct smbmount *smp = VFSTOSMBFS(mp); 354 struct smbnode *np = smp->sm_root; 355 struct smb_share *ssp = smp->sm_share; 356 struct smb_cred scred; 357 struct ucred *cred; 358 int error = 0; 359 360 if (td->td_proc) 361 cred = td->td_proc->p_ucred; 362 else 363 cred = proc0.p_ucred; 364 365 if (np == NULL) 366 return EINVAL; 367 368 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 369 sbp->f_spare2 = 0; /* placeholder */ 370 smb_makescred(&scred, td, cred); 371 372 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 373 error = smbfs_smb_statfs2(ssp, sbp, &scred); 374 else 375 error = smbfs_smb_statfs(ssp, sbp, &scred); 376 if (error) 377 return error; 378 sbp->f_flags = 0; /* copy of mount exported flags */ 379 if (sbp != &mp->mnt_stat) { 380 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 381 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 382 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 383 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 384 } 385 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 386 return 0; 387 } 388 389 /* 390 * Flush out the buffer cache 391 */ 392 /* ARGSUSED */ 393 static int 394 smbfs_sync(struct mount *mp, int waitfor, struct thread *td) 395 { 396 struct vnode *vp; 397 int error, allerror = 0; 398 /* 399 * Force stale buffer cache information to be flushed. 400 */ 401 loop: 402 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 403 vp != NULL; 404 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 405 /* 406 * If the vnode that we are about to sync is no longer 407 * associated with this mount point, start over. 408 */ 409 if (vp->v_mount != mp) 410 goto loop; 411 if (VOP_ISLOCKED(vp, NULL) || RB_EMPTY(&vp->v_rbdirty_tree) || 412 waitfor == MNT_LAZY) 413 continue; 414 if (vget(vp, LK_EXCLUSIVE, td)) 415 goto loop; 416 error = VOP_FSYNC(vp, waitfor, td); 417 if (error) 418 allerror = error; 419 vput(vp); 420 } 421 return (allerror); 422 } 423 424 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 425 /* 426 * smbfs flat namespace lookup. Unsupported. 427 */ 428 /* ARGSUSED */ 429 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 430 { 431 return (EOPNOTSUPP); 432 } 433 434 /* ARGSUSED */ 435 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 436 struct sockaddr *nam, struct vnode **vpp, 437 int *exflagsp, struct ucred **credanonp) 438 { 439 return (EINVAL); 440 } 441 442 /* 443 * Vnode pointer to File handle, should never happen either 444 */ 445 /* ARGSUSED */ 446 static int 447 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 448 { 449 return (EINVAL); 450 } 451 452 #endif /* __FreeBSD_version < 400009 */ 453