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 1.31 2006/09/05 00:55:51 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 vop_ops smbfs_vnode_vops; 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 ucred *); 85 static int smbfs_root(struct mount *, struct vnode **); 86 static int smbfs_statfs(struct mount *, struct statfs *, struct ucred *); 87 static int smbfs_sync(struct mount *, int); 88 static int smbfs_unmount(struct mount *, int); 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 ucred *cred) 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 int error; 129 char *pc, *pe; 130 131 if (data == NULL) { 132 printf("missing data argument\n"); 133 return EINVAL; 134 } 135 if (mp->mnt_flag & MNT_UPDATE) { 136 printf("MNT_UPDATE not implemented"); 137 return EOPNOTSUPP; 138 } 139 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 140 if (error) 141 return error; 142 if (args.version != SMBFS_VERSION) { 143 printf("mount version mismatch: kernel=%d, mount=%d\n", 144 SMBFS_VERSION, args.version); 145 return EINVAL; 146 } 147 smb_makescred(&scred, curthread, cred); 148 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 149 if (error) { 150 printf("invalid device handle %d (%d)\n", args.dev, error); 151 return error; 152 } 153 vcp = SSTOVC(ssp); 154 smb_share_unlock(ssp, 0); 155 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 156 157 #ifdef SMBFS_USEZONE 158 smp = zalloc(smbfsmount_zone); 159 #else 160 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_WAITOK|M_USE_RESERVE); 161 #endif 162 if (smp == NULL) { 163 printf("could not alloc smbmount\n"); 164 error = ENOMEM; 165 goto bad; 166 } 167 bzero(smp, sizeof(*smp)); 168 mp->mnt_data = (qaddr_t)smp; 169 smp->sm_cred = crhold(cred); 170 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 171 if (smp->sm_hash == NULL) 172 goto bad; 173 lockinit(&smp->sm_hashlock, "smbfsh", 0, 0); 174 smp->sm_share = ssp; 175 smp->sm_root = NULL; 176 smp->sm_args = args; 177 smp->sm_caseopt = args.caseopt; 178 smp->sm_args.file_mode = (smp->sm_args.file_mode & 179 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 180 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 181 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 182 183 /* simple_lock_init(&smp->sm_npslock);*/ 184 pc = mp->mnt_stat.f_mntfromname; 185 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 186 bzero(pc, MNAMELEN); 187 *pc++ = '/'; 188 *pc++ = '/'; 189 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 190 if (pc < pe-1) { 191 *(pc++) = '@'; 192 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 193 if (pc < pe - 1) { 194 *(pc++) = '/'; 195 strncpy(pc, ssp->ss_name, pe - pc - 2); 196 } 197 } 198 /* protect against invalid mount points */ 199 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 200 vfs_getnewfsid(mp); 201 202 vfs_add_vnodeops(mp, &smbfs_vnode_vops, &mp->mnt_vn_norm_ops); 203 204 error = smbfs_root(mp, &vp); 205 if (error) 206 goto bad; 207 vn_unlock(vp); 208 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 209 210 #ifdef DIAGNOSTICS 211 SMBERROR("mp=%p\n", mp); 212 #endif 213 return error; 214 bad: 215 if (smp) { 216 if (smp->sm_cred) 217 crfree(smp->sm_cred); 218 if (smp->sm_hash) 219 kfree(smp->sm_hash, M_SMBFSHASH); 220 lockdestroy(&smp->sm_hashlock); 221 #ifdef SMBFS_USEZONE 222 zfree(smbfsmount_zone, smp); 223 #else 224 kfree(smp, M_SMBFSDATA); 225 #endif 226 } 227 if (ssp) 228 smb_share_put(ssp, &scred); 229 return error; 230 } 231 232 /* Unmount the filesystem described by mp. */ 233 static int 234 smbfs_unmount(struct mount *mp, int mntflags) 235 { 236 struct smbmount *smp = VFSTOSMBFS(mp); 237 struct smb_cred scred; 238 int error, flags; 239 240 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 241 flags = 0; 242 if (mntflags & MNT_FORCE) 243 flags |= FORCECLOSE; 244 /* 245 * Keep trying to flush the vnode list for the mount while 246 * some are still busy and we are making progress towards 247 * making them not busy. This is needed because smbfs vnodes 248 * reference their parent directory but may appear after their 249 * parent in the list; one pass over the vnode list is not 250 * sufficient in this case. 251 */ 252 do { 253 smp->sm_didrele = 0; 254 /* There is 1 extra root vnode reference from smbfs_mount(). */ 255 error = vflush(mp, 1, flags); 256 } while (error == EBUSY && smp->sm_didrele != 0); 257 if (error) 258 return error; 259 smb_makescred(&scred, curthread, smp->sm_cred); 260 smb_share_put(smp->sm_share, &scred); 261 mp->mnt_data = (qaddr_t)0; 262 263 if (smp->sm_cred) 264 crfree(smp->sm_cred); 265 if (smp->sm_hash) 266 kfree(smp->sm_hash, M_SMBFSHASH); 267 lockdestroy(&smp->sm_hashlock); 268 #ifdef SMBFS_USEZONE 269 zfree(smbfsmount_zone, smp); 270 #else 271 kfree(smp, M_SMBFSDATA); 272 #endif 273 mp->mnt_flag &= ~MNT_LOCAL; 274 return error; 275 } 276 277 /* 278 * Return locked root vnode of a filesystem 279 */ 280 static int 281 smbfs_root(struct mount *mp, struct vnode **vpp) 282 { 283 struct thread *td = curthread; /* XXX */ 284 struct smbmount *smp = VFSTOSMBFS(mp); 285 struct vnode *vp; 286 struct smbnode *np; 287 struct smbfattr fattr; 288 struct ucred *cred; 289 struct smb_cred scred; 290 int error; 291 292 if (smp == NULL) { 293 SMBERROR("smp == NULL (bug in umount)\n"); 294 return EINVAL; 295 } 296 if (smp->sm_root) { 297 *vpp = SMBTOV(smp->sm_root); 298 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY); 299 } 300 if (td->td_proc) 301 cred = td->td_proc->p_ucred; 302 else 303 cred = proc0.p_ucred; 304 305 smb_makescred(&scred, td, cred); 306 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 307 if (error) 308 return error; 309 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 310 if (error) 311 return error; 312 vp->v_flag |= VROOT; 313 np = VTOSMB(vp); 314 smp->sm_root = np; 315 *vpp = vp; 316 return 0; 317 } 318 319 /*ARGSUSED*/ 320 int 321 smbfs_init(struct vfsconf *vfsp) 322 { 323 #ifdef SMBFS_USEZONE 324 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 325 #endif 326 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 327 SMBVDEBUG("done.\n"); 328 return 0; 329 } 330 331 /*ARGSUSED*/ 332 int 333 smbfs_uninit(struct vfsconf *vfsp) 334 { 335 SMBVDEBUG("done.\n"); 336 return 0; 337 } 338 339 /* 340 * smbfs_statfs call 341 */ 342 int 343 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 344 { 345 struct smbmount *smp = VFSTOSMBFS(mp); 346 struct smbnode *np = smp->sm_root; 347 struct smb_share *ssp = smp->sm_share; 348 struct smb_cred scred; 349 int error = 0; 350 351 if (np == NULL) 352 return EINVAL; 353 354 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 355 sbp->f_spare2 = 0; /* placeholder */ 356 smb_makescred(&scred, curthread, cred); 357 358 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 359 error = smbfs_smb_statfs2(ssp, sbp, &scred); 360 else 361 error = smbfs_smb_statfs(ssp, sbp, &scred); 362 if (error) 363 return error; 364 sbp->f_flags = 0; /* copy of mount exported flags */ 365 if (sbp != &mp->mnt_stat) { 366 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 367 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 368 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 369 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 370 } 371 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 372 return 0; 373 } 374 375 /* 376 * Flush out the buffer cache 377 */ 378 /* ARGSUSED */ 379 static int 380 smbfs_sync(struct mount *mp, int waitfor) 381 { 382 struct vnode *vp; 383 int error, allerror = 0; 384 /* 385 * Force stale buffer cache information to be flushed. 386 */ 387 loop: 388 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 389 vp != NULL; 390 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 391 /* 392 * If the vnode that we are about to sync is no longer 393 * associated with this mount point, start over. 394 */ 395 if (vp->v_mount != mp) 396 goto loop; 397 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) || 398 waitfor == MNT_LAZY) 399 continue; 400 if (vget(vp, LK_EXCLUSIVE)) 401 goto loop; 402 error = VOP_FSYNC(vp, waitfor); 403 if (error) 404 allerror = error; 405 vput(vp); 406 } 407 return (allerror); 408 } 409 410 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 411 /* 412 * smbfs flat namespace lookup. Unsupported. 413 */ 414 /* ARGSUSED */ 415 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 416 { 417 return (EOPNOTSUPP); 418 } 419 420 /* ARGSUSED */ 421 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 422 struct sockaddr *nam, struct vnode **vpp, 423 int *exflagsp, struct ucred **credanonp) 424 { 425 return (EINVAL); 426 } 427 428 /* 429 * Vnode pointer to File handle, should never happen either 430 */ 431 /* ARGSUSED */ 432 static int 433 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 434 { 435 return (EINVAL); 436 } 437 438 #endif /* __FreeBSD_version < 400009 */ 439