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 1.22 2005/07/26 15:43:36 hmp 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, smbfs_vnodeop_entries); 208 209 error = smbfs_root(mp, &vp); 210 if (error) 211 goto bad; 212 VOP_UNLOCK(vp, 0, td); 213 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 214 215 #ifdef DIAGNOSTICS 216 SMBERROR("mp=%p\n", mp); 217 #endif 218 return error; 219 bad: 220 if (smp) { 221 if (smp->sm_hash) 222 free(smp->sm_hash, M_SMBFSHASH); 223 lockdestroy(&smp->sm_hashlock); 224 #ifdef SMBFS_USEZONE 225 zfree(smbfsmount_zone, smp); 226 #else 227 free(smp, M_SMBFSDATA); 228 #endif 229 } 230 if (ssp) 231 smb_share_put(ssp, &scred); 232 return error; 233 } 234 235 /* Unmount the filesystem described by mp. */ 236 static int 237 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 238 { 239 struct smbmount *smp = VFSTOSMBFS(mp); 240 struct smb_cred scred; 241 struct ucred *cred; 242 int error, flags; 243 244 if (td->td_proc) 245 cred = td->td_proc->p_ucred; 246 else 247 cred = proc0.p_ucred; 248 249 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 250 flags = 0; 251 if (mntflags & MNT_FORCE) 252 flags |= FORCECLOSE; 253 /* 254 * Keep trying to flush the vnode list for the mount while 255 * some are still busy and we are making progress towards 256 * making them not busy. This is needed because smbfs vnodes 257 * reference their parent directory but may appear after their 258 * parent in the list; one pass over the vnode list is not 259 * sufficient in this case. 260 */ 261 do { 262 smp->sm_didrele = 0; 263 /* There is 1 extra root vnode reference from smbfs_mount(). */ 264 error = vflush(mp, 1, flags); 265 } while (error == EBUSY && smp->sm_didrele != 0); 266 if (error) 267 return error; 268 smb_makescred(&scred, td, cred); 269 smb_share_put(smp->sm_share, &scred); 270 mp->mnt_data = (qaddr_t)0; 271 272 if (smp->sm_hash) 273 free(smp->sm_hash, M_SMBFSHASH); 274 lockdestroy(&smp->sm_hashlock); 275 #ifdef SMBFS_USEZONE 276 zfree(smbfsmount_zone, smp); 277 #else 278 free(smp, M_SMBFSDATA); 279 #endif 280 mp->mnt_flag &= ~MNT_LOCAL; 281 return error; 282 } 283 284 /* 285 * Return locked root vnode of a filesystem 286 */ 287 static int 288 smbfs_root(struct mount *mp, struct vnode **vpp) 289 { 290 struct thread *td = curthread; /* XXX */ 291 struct smbmount *smp = VFSTOSMBFS(mp); 292 struct vnode *vp; 293 struct smbnode *np; 294 struct smbfattr fattr; 295 struct ucred *cred; 296 struct smb_cred scred; 297 int error; 298 299 if (smp == NULL) { 300 SMBERROR("smp == NULL (bug in umount)\n"); 301 return EINVAL; 302 } 303 if (smp->sm_root) { 304 *vpp = SMBTOV(smp->sm_root); 305 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 306 } 307 if (td->td_proc) 308 cred = td->td_proc->p_ucred; 309 else 310 cred = proc0.p_ucred; 311 312 smb_makescred(&scred, td, cred); 313 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 314 if (error) 315 return error; 316 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 317 if (error) 318 return error; 319 vp->v_flag |= VROOT; 320 np = VTOSMB(vp); 321 smp->sm_root = np; 322 *vpp = vp; 323 return 0; 324 } 325 326 /*ARGSUSED*/ 327 int 328 smbfs_init(struct vfsconf *vfsp) 329 { 330 #ifdef SMBFS_USEZONE 331 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 332 #endif 333 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 334 SMBVDEBUG("done.\n"); 335 return 0; 336 } 337 338 /*ARGSUSED*/ 339 int 340 smbfs_uninit(struct vfsconf *vfsp) 341 { 342 SMBVDEBUG("done.\n"); 343 return 0; 344 } 345 346 /* 347 * smbfs_statfs call 348 */ 349 int 350 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 351 { 352 struct smbmount *smp = VFSTOSMBFS(mp); 353 struct smbnode *np = smp->sm_root; 354 struct smb_share *ssp = smp->sm_share; 355 struct smb_cred scred; 356 struct ucred *cred; 357 int error = 0; 358 359 if (td->td_proc) 360 cred = td->td_proc->p_ucred; 361 else 362 cred = proc0.p_ucred; 363 364 if (np == NULL) 365 return EINVAL; 366 367 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 368 sbp->f_spare2 = 0; /* placeholder */ 369 smb_makescred(&scred, td, cred); 370 371 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 372 error = smbfs_smb_statfs2(ssp, sbp, &scred); 373 else 374 error = smbfs_smb_statfs(ssp, sbp, &scred); 375 if (error) 376 return error; 377 sbp->f_flags = 0; /* copy of mount exported flags */ 378 if (sbp != &mp->mnt_stat) { 379 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 380 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 381 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 382 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 383 } 384 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 385 return 0; 386 } 387 388 /* 389 * Flush out the buffer cache 390 */ 391 /* ARGSUSED */ 392 static int 393 smbfs_sync(struct mount *mp, int waitfor, struct thread *td) 394 { 395 struct vnode *vp; 396 int error, allerror = 0; 397 /* 398 * Force stale buffer cache information to be flushed. 399 */ 400 loop: 401 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 402 vp != NULL; 403 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 404 /* 405 * If the vnode that we are about to sync is no longer 406 * associated with this mount point, start over. 407 */ 408 if (vp->v_mount != mp) 409 goto loop; 410 if (VOP_ISLOCKED(vp, NULL) || RB_EMPTY(&vp->v_rbdirty_tree) || 411 waitfor == MNT_LAZY) 412 continue; 413 if (vget(vp, LK_EXCLUSIVE, td)) 414 goto loop; 415 error = VOP_FSYNC(vp, waitfor, td); 416 if (error) 417 allerror = error; 418 vput(vp); 419 } 420 return (allerror); 421 } 422 423 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 424 /* 425 * smbfs flat namespace lookup. Unsupported. 426 */ 427 /* ARGSUSED */ 428 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 429 { 430 return (EOPNOTSUPP); 431 } 432 433 /* ARGSUSED */ 434 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 435 struct sockaddr *nam, struct vnode **vpp, 436 int *exflagsp, struct ucred **credanonp) 437 { 438 return (EINVAL); 439 } 440 441 /* 442 * Vnode pointer to File handle, should never happen either 443 */ 444 /* ARGSUSED */ 445 static int 446 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 447 { 448 return (EINVAL); 449 } 450 451 #endif /* __FreeBSD_version < 400009 */ 452