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 * $FreeBSD$ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/bio.h> 39 #include <sys/buf.h> 40 #include <sys/kernel.h> 41 #include <sys/sysctl.h> 42 #include <sys/vnode.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/malloc.h> 46 #include <sys/module.h> 47 #include <sys/sx.h> 48 49 50 #include <netsmb/smb.h> 51 #include <netsmb/smb_conn.h> 52 #include <netsmb/smb_subr.h> 53 #include <netsmb/smb_dev.h> 54 55 #include <fs/smbfs/smbfs.h> 56 #include <fs/smbfs/smbfs_node.h> 57 #include <fs/smbfs/smbfs_subr.h> 58 59 static int smbfs_debuglevel = 0; 60 61 static int smbfs_version = SMBFS_VERSION; 62 63 #ifdef SMBFS_USEZONE 64 #include <vm/vm.h> 65 #include <vm/vm_extern.h> 66 67 vm_zone_t smbfsmount_zone; 68 #endif 69 70 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 71 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 72 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 73 74 static MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table"); 75 76 static vfs_init_t smbfs_init; 77 static vfs_uninit_t smbfs_uninit; 78 static vfs_cmount_t smbfs_cmount; 79 static vfs_mount_t smbfs_mount; 80 static vfs_root_t smbfs_root; 81 static vfs_quotactl_t smbfs_quotactl; 82 static vfs_statfs_t smbfs_statfs; 83 static vfs_unmount_t smbfs_unmount; 84 85 static struct vfsops smbfs_vfsops = { 86 .vfs_init = smbfs_init, 87 .vfs_cmount = smbfs_cmount, 88 .vfs_mount = smbfs_mount, 89 .vfs_quotactl = smbfs_quotactl, 90 .vfs_root = smbfs_root, 91 .vfs_statfs = smbfs_statfs, 92 .vfs_sync = vfs_stdsync, 93 .vfs_uninit = smbfs_uninit, 94 .vfs_unmount = smbfs_unmount, 95 }; 96 97 98 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 99 100 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 101 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 102 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 103 104 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 105 106 static int 107 smbfs_cmount(struct mntarg *ma, void * data, int flags, struct thread *td) 108 { 109 struct smbfs_args args; 110 int error; 111 112 error = copyin(data, &args, sizeof(struct smbfs_args)); 113 if (error) 114 return error; 115 116 if (args.version != SMBFS_VERSION) { 117 printf("mount version mismatch: kernel=%d, mount=%d\n", 118 SMBFS_VERSION, args.version); 119 return EINVAL; 120 } 121 ma = mount_argf(ma, "dev", "%d", args.dev); 122 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 123 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 124 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 125 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 126 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 127 ma = mount_arg(ma, "rootpath", args.root_path, -1); 128 ma = mount_argf(ma, "uid", "%d", args.uid); 129 ma = mount_argf(ma, "gid", "%d", args.gid); 130 ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 131 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 132 ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 133 134 error = kernel_mount(ma, flags); 135 136 return (error); 137 } 138 139 static const char *smbfs_opts[] = { 140 "dev", "soft", "intr", "strong", "have_nls", "long", 141 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 142 "caseopt", "errmsg", NULL 143 }; 144 145 static int 146 smbfs_mount(struct mount *mp, struct thread *td) 147 { 148 struct smbmount *smp = NULL; 149 struct smb_vc *vcp; 150 struct smb_share *ssp = NULL; 151 struct vnode *vp; 152 struct smb_cred scred; 153 int error, v; 154 char *pc, *pe; 155 156 if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) 157 return EOPNOTSUPP; 158 159 if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { 160 vfs_mount_error(mp, "%s", "Invalid option"); 161 return (EINVAL); 162 } 163 164 smb_makescred(&scred, td, td->td_ucred); 165 if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) { 166 vfs_mount_error(mp, "No dev option"); 167 return (EINVAL); 168 } 169 error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp); 170 if (error) { 171 printf("invalid device handle %d (%d)\n", v, error); 172 vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error); 173 return error; 174 } 175 vcp = SSTOVC(ssp); 176 smb_share_unlock(ssp, 0); 177 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 178 179 #ifdef SMBFS_USEZONE 180 smp = zalloc(smbfsmount_zone); 181 #else 182 smp = malloc(sizeof(*smp), M_SMBFSDATA, 183 M_WAITOK|M_USE_RESERVE); 184 #endif 185 if (smp == NULL) { 186 printf("could not alloc smbmount\n"); 187 vfs_mount_error(mp, "could not alloc smbmount", v, error); 188 error = ENOMEM; 189 goto bad; 190 } 191 bzero(smp, sizeof(*smp)); 192 mp->mnt_data = smp; 193 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 194 if (smp->sm_hash == NULL) 195 goto bad; 196 sx_init(&smp->sm_hashlock, "smbfsh"); 197 smp->sm_share = ssp; 198 smp->sm_root = NULL; 199 if (1 != vfs_scanopt(mp->mnt_optnew, 200 "caseopt", "%d", &smp->sm_caseopt)) { 201 vfs_mount_error(mp, "Invalid caseopt"); 202 error = EINVAL; 203 goto bad; 204 } 205 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 206 vfs_mount_error(mp, "Invalid uid"); 207 error = EINVAL; 208 goto bad; 209 } 210 smp->sm_uid = v; 211 212 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 213 vfs_mount_error(mp, "Invalid gid"); 214 error = EINVAL; 215 goto bad; 216 } 217 smp->sm_gid = v; 218 219 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 220 vfs_mount_error(mp, "Invalid file_mode"); 221 error = EINVAL; 222 goto bad; 223 } 224 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 225 226 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 227 vfs_mount_error(mp, "Invalid dir_mode"); 228 error = EINVAL; 229 goto bad; 230 } 231 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 232 233 vfs_flagopt(mp->mnt_optnew, 234 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 235 236 /* simple_lock_init(&smp->sm_npslock);*/ 237 pc = mp->mnt_stat.f_mntfromname; 238 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 239 bzero(pc, MNAMELEN); 240 *pc++ = '/'; 241 *pc++ = '/'; 242 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 243 if (pc < pe-1) { 244 *(pc++) = '@'; 245 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 246 if (pc < pe - 1) { 247 *(pc++) = '/'; 248 strncpy(pc, ssp->ss_name, pe - pc - 2); 249 } 250 } 251 vfs_getnewfsid(mp); 252 error = smbfs_root(mp, LK_EXCLUSIVE, &vp, td); 253 if (error) { 254 vfs_mount_error(mp, "smbfs_root error: %d", error); 255 goto bad; 256 } 257 VOP_UNLOCK(vp, 0); 258 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 259 260 #ifdef DIAGNOSTICS 261 SMBERROR("mp=%p\n", mp); 262 #endif 263 return error; 264 bad: 265 if (smp) { 266 if (smp->sm_hash) 267 free(smp->sm_hash, M_SMBFSHASH); 268 sx_destroy(&smp->sm_hashlock); 269 #ifdef SMBFS_USEZONE 270 zfree(smbfsmount_zone, smp); 271 #else 272 free(smp, M_SMBFSDATA); 273 #endif 274 } 275 if (ssp) 276 smb_share_put(ssp, &scred); 277 return error; 278 } 279 280 /* Unmount the filesystem described by mp. */ 281 static int 282 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 283 { 284 struct smbmount *smp = VFSTOSMBFS(mp); 285 struct smb_cred scred; 286 int error, flags; 287 288 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 289 flags = 0; 290 if (mntflags & MNT_FORCE) 291 flags |= FORCECLOSE; 292 /* 293 * Keep trying to flush the vnode list for the mount while 294 * some are still busy and we are making progress towards 295 * making them not busy. This is needed because smbfs vnodes 296 * reference their parent directory but may appear after their 297 * parent in the list; one pass over the vnode list is not 298 * sufficient in this case. 299 */ 300 do { 301 smp->sm_didrele = 0; 302 /* There is 1 extra root vnode reference from smbfs_mount(). */ 303 error = vflush(mp, 1, flags, td); 304 } while (error == EBUSY && smp->sm_didrele != 0); 305 if (error) 306 return error; 307 smb_makescred(&scred, td, td->td_ucred); 308 error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); 309 if (error) 310 return error; 311 smb_share_put(smp->sm_share, &scred); 312 mp->mnt_data = NULL; 313 314 if (smp->sm_hash) 315 free(smp->sm_hash, M_SMBFSHASH); 316 sx_destroy(&smp->sm_hashlock); 317 #ifdef SMBFS_USEZONE 318 zfree(smbfsmount_zone, smp); 319 #else 320 free(smp, M_SMBFSDATA); 321 #endif 322 MNT_ILOCK(mp); 323 mp->mnt_flag &= ~MNT_LOCAL; 324 MNT_IUNLOCK(mp); 325 return error; 326 } 327 328 /* 329 * Return locked root vnode of a filesystem 330 */ 331 static int 332 smbfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 333 { 334 struct smbmount *smp = VFSTOSMBFS(mp); 335 struct vnode *vp; 336 struct smbnode *np; 337 struct smbfattr fattr; 338 struct ucred *cred = td->td_ucred; 339 struct smb_cred scred; 340 int error; 341 342 if (smp == NULL) { 343 SMBERROR("smp == NULL (bug in umount)\n"); 344 vfs_mount_error(mp, "smp == NULL (bug in umount)"); 345 return EINVAL; 346 } 347 if (smp->sm_root) { 348 *vpp = SMBTOV(smp->sm_root); 349 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 350 } 351 smb_makescred(&scred, td, cred); 352 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 353 if (error) 354 return error; 355 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 356 if (error) 357 return error; 358 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 359 vp->v_vflag |= VV_ROOT; 360 np = VTOSMB(vp); 361 smp->sm_root = np; 362 *vpp = vp; 363 return 0; 364 } 365 366 /* 367 * Do operations associated with quotas, not supported 368 */ 369 /* ARGSUSED */ 370 static int 371 smbfs_quotactl(mp, cmd, uid, arg, td) 372 struct mount *mp; 373 int cmd; 374 uid_t uid; 375 void *arg; 376 struct thread *td; 377 { 378 SMBVDEBUG("return EOPNOTSUPP\n"); 379 return EOPNOTSUPP; 380 } 381 382 /*ARGSUSED*/ 383 int 384 smbfs_init(struct vfsconf *vfsp) 385 { 386 #ifdef SMBFS_USEZONE 387 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 388 #endif 389 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 390 SMBVDEBUG("done.\n"); 391 return 0; 392 } 393 394 /*ARGSUSED*/ 395 int 396 smbfs_uninit(struct vfsconf *vfsp) 397 { 398 399 SMBVDEBUG("done.\n"); 400 return 0; 401 } 402 403 /* 404 * smbfs_statfs call 405 */ 406 int 407 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 408 { 409 struct smbmount *smp = VFSTOSMBFS(mp); 410 struct smbnode *np = smp->sm_root; 411 struct smb_share *ssp = smp->sm_share; 412 struct smb_cred scred; 413 int error = 0; 414 415 if (np == NULL) { 416 vfs_mount_error(mp, "np == NULL"); 417 return EINVAL; 418 } 419 420 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 421 smb_makescred(&scred, td, td->td_ucred); 422 423 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 424 error = smbfs_smb_statfs2(ssp, sbp, &scred); 425 else 426 error = smbfs_smb_statfs(ssp, sbp, &scred); 427 if (error) 428 return error; 429 sbp->f_flags = 0; /* copy of mount exported flags */ 430 return 0; 431 } 432