1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000-2001 Boris Popov 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/proc.h> 34 #include <sys/bio.h> 35 #include <sys/buf.h> 36 #include <sys/kernel.h> 37 #include <sys/sysctl.h> 38 #include <sys/vnode.h> 39 #include <sys/mount.h> 40 #include <sys/stat.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/sx.h> 44 45 46 #include <netsmb/smb.h> 47 #include <netsmb/smb_conn.h> 48 #include <netsmb/smb_subr.h> 49 #include <netsmb/smb_dev.h> 50 51 #include <fs/smbfs/smbfs.h> 52 #include <fs/smbfs/smbfs_node.h> 53 #include <fs/smbfs/smbfs_subr.h> 54 55 static int smbfs_debuglevel = 0; 56 57 static int smbfs_version = SMBFS_VERSION; 58 59 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 60 "SMB/CIFS filesystem"); 61 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 62 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 63 64 static vfs_init_t smbfs_init; 65 static vfs_uninit_t smbfs_uninit; 66 static vfs_cmount_t smbfs_cmount; 67 static vfs_mount_t smbfs_mount; 68 static vfs_root_t smbfs_root; 69 static vfs_quotactl_t smbfs_quotactl; 70 static vfs_statfs_t smbfs_statfs; 71 static vfs_unmount_t smbfs_unmount; 72 73 static struct vfsops smbfs_vfsops = { 74 .vfs_init = smbfs_init, 75 .vfs_cmount = smbfs_cmount, 76 .vfs_mount = smbfs_mount, 77 .vfs_quotactl = smbfs_quotactl, 78 .vfs_root = smbfs_root, 79 .vfs_statfs = smbfs_statfs, 80 .vfs_sync = vfs_stdsync, 81 .vfs_uninit = smbfs_uninit, 82 .vfs_unmount = smbfs_unmount, 83 }; 84 85 86 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 87 88 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 89 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 90 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 91 92 uma_zone_t smbfs_pbuf_zone; 93 94 static int 95 smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags) 96 { 97 struct smbfs_args args; 98 int error; 99 100 error = copyin(data, &args, sizeof(struct smbfs_args)); 101 if (error) 102 return error; 103 104 if (args.version != SMBFS_VERSION) { 105 printf("mount version mismatch: kernel=%d, mount=%d\n", 106 SMBFS_VERSION, args.version); 107 return EINVAL; 108 } 109 ma = mount_argf(ma, "dev", "%d", args.dev); 110 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 111 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 112 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 113 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 114 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 115 ma = mount_arg(ma, "rootpath", args.root_path, -1); 116 ma = mount_argf(ma, "uid", "%d", args.uid); 117 ma = mount_argf(ma, "gid", "%d", args.gid); 118 ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 119 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 120 ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 121 122 error = kernel_mount(ma, flags); 123 124 return (error); 125 } 126 127 static const char *smbfs_opts[] = { 128 "fd", "soft", "intr", "strong", "have_nls", "long", 129 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 130 "caseopt", "errmsg", NULL 131 }; 132 133 static int 134 smbfs_mount(struct mount *mp) 135 { 136 struct smbmount *smp = NULL; 137 struct smb_vc *vcp; 138 struct smb_share *ssp = NULL; 139 struct vnode *vp; 140 struct thread *td; 141 struct smb_dev *dev; 142 struct smb_cred *scred; 143 int error, v; 144 char *pc, *pe; 145 146 dev = NULL; 147 td = curthread; 148 if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) 149 return EOPNOTSUPP; 150 151 if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { 152 vfs_mount_error(mp, "%s", "Invalid option"); 153 return (EINVAL); 154 } 155 156 scred = smbfs_malloc_scred(); 157 smb_makescred(scred, td, td->td_ucred); 158 159 /* Ask userspace of `fd`, the file descriptor of this session */ 160 if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) { 161 vfs_mount_error(mp, "No fd option"); 162 smbfs_free_scred(scred); 163 return (EINVAL); 164 } 165 error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev); 166 smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO); 167 if (error) { 168 printf("invalid device handle %d (%d)\n", v, error); 169 vfs_mount_error(mp, "invalid device handle %d %d\n", v, error); 170 smbfs_free_scred(scred); 171 free(smp, M_SMBFSDATA); 172 return error; 173 } 174 vcp = SSTOVC(ssp); 175 smb_share_unlock(ssp); 176 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 177 mp->mnt_data = smp; 178 smp->sm_share = ssp; 179 smp->sm_root = NULL; 180 smp->sm_dev = dev; 181 if (1 != vfs_scanopt(mp->mnt_optnew, 182 "caseopt", "%d", &smp->sm_caseopt)) { 183 vfs_mount_error(mp, "Invalid caseopt"); 184 error = EINVAL; 185 goto bad; 186 } 187 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 188 vfs_mount_error(mp, "Invalid uid"); 189 error = EINVAL; 190 goto bad; 191 } 192 smp->sm_uid = v; 193 194 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 195 vfs_mount_error(mp, "Invalid gid"); 196 error = EINVAL; 197 goto bad; 198 } 199 smp->sm_gid = v; 200 201 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 202 vfs_mount_error(mp, "Invalid file_mode"); 203 error = EINVAL; 204 goto bad; 205 } 206 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 207 208 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 209 vfs_mount_error(mp, "Invalid dir_mode"); 210 error = EINVAL; 211 goto bad; 212 } 213 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 214 215 vfs_flagopt(mp->mnt_optnew, 216 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 217 218 pc = mp->mnt_stat.f_mntfromname; 219 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 220 bzero(pc, MNAMELEN); 221 *pc++ = '/'; 222 *pc++ = '/'; 223 pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 224 if (pc < pe-1) { 225 *(pc++) = '@'; 226 pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 227 if (pc < pe - 1) { 228 *(pc++) = '/'; 229 strncpy(pc, ssp->ss_name, pe - pc - 2); 230 } 231 } 232 vfs_getnewfsid(mp); 233 error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 234 if (error) { 235 vfs_mount_error(mp, "smbfs_root error: %d", error); 236 goto bad; 237 } 238 VOP_UNLOCK(vp); 239 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 240 241 #ifdef DIAGNOSTIC 242 SMBERROR("mp=%p\n", mp); 243 #endif 244 smbfs_free_scred(scred); 245 return error; 246 bad: 247 if (ssp) 248 smb_share_put(ssp, scred); 249 smbfs_free_scred(scred); 250 SMB_LOCK(); 251 if (error && smp->sm_dev == dev) { 252 smp->sm_dev = NULL; 253 sdp_trydestroy(dev); 254 } 255 SMB_UNLOCK(); 256 free(smp, M_SMBFSDATA); 257 return error; 258 } 259 260 /* Unmount the filesystem described by mp. */ 261 static int 262 smbfs_unmount(struct mount *mp, int mntflags) 263 { 264 struct thread *td; 265 struct smbmount *smp = VFSTOSMBFS(mp); 266 struct smb_cred *scred; 267 struct smb_dev *dev; 268 int error, flags; 269 270 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 271 td = curthread; 272 flags = 0; 273 if (mntflags & MNT_FORCE) 274 flags |= FORCECLOSE; 275 /* 276 * Keep trying to flush the vnode list for the mount while 277 * some are still busy and we are making progress towards 278 * making them not busy. This is needed because smbfs vnodes 279 * reference their parent directory but may appear after their 280 * parent in the list; one pass over the vnode list is not 281 * sufficient in this case. 282 */ 283 do { 284 smp->sm_didrele = 0; 285 /* There is 1 extra root vnode reference from smbfs_mount(). */ 286 error = vflush(mp, 1, flags, td); 287 } while (error == EBUSY && smp->sm_didrele != 0); 288 if (error) 289 return error; 290 scred = smbfs_malloc_scred(); 291 smb_makescred(scred, td, td->td_ucred); 292 error = smb_share_lock(smp->sm_share); 293 if (error) 294 goto out; 295 smb_share_put(smp->sm_share, scred); 296 SMB_LOCK(); 297 dev = smp->sm_dev; 298 if (!dev) 299 panic("No private data for mount point"); 300 sdp_trydestroy(dev); 301 mp->mnt_data = NULL; 302 SMB_UNLOCK(); 303 free(smp, M_SMBFSDATA); 304 MNT_ILOCK(mp); 305 mp->mnt_flag &= ~MNT_LOCAL; 306 MNT_IUNLOCK(mp); 307 out: 308 smbfs_free_scred(scred); 309 return error; 310 } 311 312 /* 313 * Return locked root vnode of a filesystem 314 */ 315 static int 316 smbfs_root(struct mount *mp, int flags, struct vnode **vpp) 317 { 318 struct smbmount *smp = VFSTOSMBFS(mp); 319 struct vnode *vp; 320 struct smbnode *np; 321 struct smbfattr fattr; 322 struct thread *td; 323 struct ucred *cred; 324 struct smb_cred *scred; 325 int error; 326 327 td = curthread; 328 cred = td->td_ucred; 329 330 if (smp->sm_root) { 331 *vpp = SMBTOV(smp->sm_root); 332 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 333 } 334 scred = smbfs_malloc_scred(); 335 smb_makescred(scred, td, cred); 336 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, scred); 337 if (error) 338 goto out; 339 error = smbfs_nget(mp, NULL, NULL, 0, &fattr, &vp); 340 if (error) 341 goto out; 342 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 343 vp->v_vflag |= VV_ROOT; 344 np = VTOSMB(vp); 345 smp->sm_root = np; 346 *vpp = vp; 347 out: 348 smbfs_free_scred(scred); 349 return error; 350 } 351 352 /* 353 * Do operations associated with quotas, not supported 354 */ 355 /* ARGSUSED */ 356 static int 357 smbfs_quotactl(mp, cmd, uid, arg) 358 struct mount *mp; 359 int cmd; 360 uid_t uid; 361 void *arg; 362 { 363 SMBVDEBUG("return EOPNOTSUPP\n"); 364 return EOPNOTSUPP; 365 } 366 367 /*ARGSUSED*/ 368 int 369 smbfs_init(struct vfsconf *vfsp) 370 { 371 372 smbfs_pbuf_zone = pbuf_zsecond_create("smbpbuf", nswbuf / 2); 373 SMBVDEBUG("done.\n"); 374 return 0; 375 } 376 377 /*ARGSUSED*/ 378 int 379 smbfs_uninit(struct vfsconf *vfsp) 380 { 381 382 uma_zdestroy(smbfs_pbuf_zone); 383 SMBVDEBUG("done.\n"); 384 return 0; 385 } 386 387 /* 388 * smbfs_statfs call 389 */ 390 int 391 smbfs_statfs(struct mount *mp, struct statfs *sbp) 392 { 393 struct thread *td = curthread; 394 struct smbmount *smp = VFSTOSMBFS(mp); 395 struct smbnode *np = smp->sm_root; 396 struct smb_share *ssp = smp->sm_share; 397 struct smb_cred *scred; 398 int error; 399 400 if (np == NULL) { 401 vfs_mount_error(mp, "np == NULL"); 402 return EINVAL; 403 } 404 405 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 406 scred = smbfs_malloc_scred(); 407 smb_makescred(scred, td, td->td_ucred); 408 error = smbfs_smb_statfs(ssp, sbp, scred); 409 smbfs_free_scred(scred); 410 return (error); 411 } 412