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 #include "opt_netsmb.h" 35 #ifndef NETSMB 36 #error "SMBFS requires option NETSMB" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/bio.h> 43 #include <sys/buf.h> 44 #include <sys/kernel.h> 45 #include <sys/sysctl.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/stat.h> 49 #include <sys/malloc.h> 50 #include <sys/module.h> 51 52 53 #include <netsmb/smb.h> 54 #include <netsmb/smb_conn.h> 55 #include <netsmb/smb_subr.h> 56 #include <netsmb/smb_dev.h> 57 58 #include <fs/smbfs/smbfs.h> 59 #include <fs/smbfs/smbfs_node.h> 60 #include <fs/smbfs/smbfs_subr.h> 61 62 int smbfs_debuglevel = 0; 63 64 static int smbfs_version = SMBFS_VERSION; 65 66 #ifdef SMBFS_USEZONE 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 70 vm_zone_t smbfsmount_zone; 71 #endif 72 73 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 74 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 75 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 76 77 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 78 79 80 static int smbfs_mount(struct mount *, char *, caddr_t, 81 struct nameidata *, struct thread *); 82 static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 83 static int smbfs_root(struct mount *, struct vnode **); 84 static int smbfs_start(struct mount *, int, struct thread *); 85 static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 86 static int smbfs_sync(struct mount *, int, struct ucred *, struct thread *); 87 static int smbfs_unmount(struct mount *, int, struct thread *); 88 static int smbfs_init(struct vfsconf *vfsp); 89 static int smbfs_uninit(struct vfsconf *vfsp); 90 91 static struct vfsops smbfs_vfsops = { 92 smbfs_mount, 93 smbfs_start, 94 smbfs_unmount, 95 smbfs_root, 96 smbfs_quotactl, 97 smbfs_statfs, 98 smbfs_sync, 99 vfs_stdvget, 100 vfs_stdfhtovp, /* shouldn't happen */ 101 vfs_stdcheckexp, 102 vfs_stdvptofh, /* shouldn't happen */ 103 smbfs_init, 104 smbfs_uninit, 105 vfs_stdextattrctl 106 }; 107 108 109 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 110 111 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 112 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 113 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 114 115 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 116 117 static int 118 smbfs_mount(struct mount *mp, char *path, caddr_t data, 119 struct nameidata *ndp, struct thread *td) 120 { 121 struct smbfs_args args; /* will hold data from mount request */ 122 struct smbmount *smp = NULL; 123 struct smb_vc *vcp; 124 struct smb_share *ssp = NULL; 125 struct vnode *vp; 126 struct smb_cred scred; 127 int error; 128 char *pc, *pe; 129 130 if (data == NULL) { 131 printf("missing data argument\n"); 132 return EINVAL; 133 } 134 if (mp->mnt_flag & MNT_UPDATE) { 135 printf("MNT_UPDATE not implemented"); 136 return EOPNOTSUPP; 137 } 138 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 139 if (error) 140 return error; 141 if (args.version != SMBFS_VERSION) { 142 printf("mount version mismatch: kernel=%d, mount=%d\n", 143 SMBFS_VERSION, args.version); 144 return EINVAL; 145 } 146 smb_makescred(&scred, td, td->td_ucred); 147 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 148 if (error) { 149 printf("invalid device handle %d (%d)\n", args.dev, error); 150 return error; 151 } 152 vcp = SSTOVC(ssp); 153 smb_share_unlock(ssp, 0, td); 154 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 155 156 #ifdef SMBFS_USEZONE 157 smp = zalloc(smbfsmount_zone); 158 #else 159 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE); 160 #endif 161 if (smp == NULL) { 162 printf("could not alloc smbmount\n"); 163 error = ENOMEM; 164 goto bad; 165 } 166 bzero(smp, sizeof(*smp)); 167 mp->mnt_data = (qaddr_t)smp; 168 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 169 if (smp->sm_hash == NULL) 170 goto bad; 171 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 172 smp->sm_share = ssp; 173 smp->sm_root = NULL; 174 smp->sm_args = args; 175 smp->sm_caseopt = args.caseopt; 176 smp->sm_args.file_mode = (smp->sm_args.file_mode & 177 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 178 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 179 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 180 181 /* simple_lock_init(&smp->sm_npslock);*/ 182 pc = mp->mnt_stat.f_mntfromname; 183 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 184 bzero(pc, MNAMELEN); 185 *pc++ = '/'; 186 *pc++ = '/'; 187 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 188 if (pc < pe-1) { 189 *(pc++) = '@'; 190 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 191 if (pc < pe - 1) { 192 *(pc++) = '/'; 193 strncpy(pc, ssp->ss_name, pe - pc - 2); 194 } 195 } 196 /* protect against invalid mount points */ 197 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 198 vfs_getnewfsid(mp); 199 error = smbfs_root(mp, &vp); 200 if (error) 201 goto bad; 202 VOP_UNLOCK(vp, 0, td); 203 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 204 205 #ifdef DIAGNOSTICS 206 SMBERROR("mp=%p\n", mp); 207 #endif 208 return error; 209 bad: 210 if (smp) { 211 if (smp->sm_hash) 212 free(smp->sm_hash, M_SMBFSHASH); 213 lockdestroy(&smp->sm_hashlock); 214 #ifdef SMBFS_USEZONE 215 zfree(smbfsmount_zone, smp); 216 #else 217 free(smp, M_SMBFSDATA); 218 #endif 219 } 220 if (ssp) 221 smb_share_put(ssp, &scred); 222 return error; 223 } 224 225 /* Unmount the filesystem described by mp. */ 226 static int 227 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 228 { 229 struct smbmount *smp = VFSTOSMBFS(mp); 230 struct smb_cred scred; 231 int error, flags; 232 233 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 234 flags = 0; 235 if (mntflags & MNT_FORCE) 236 flags |= FORCECLOSE; 237 /* 238 * Keep trying to flush the vnode list for the mount while 239 * some are still busy and we are making progress towards 240 * making them not busy. This is needed because smbfs vnodes 241 * reference their parent directory but may appear after their 242 * parent in the list; one pass over the vnode list is not 243 * sufficient in this case. 244 */ 245 do { 246 smp->sm_didrele = 0; 247 /* There is 1 extra root vnode reference from smbfs_mount(). */ 248 error = vflush(mp, 1, flags); 249 } while (error == EBUSY && smp->sm_didrele != 0); 250 if (error) 251 return error; 252 smb_makescred(&scred, td, td->td_ucred); 253 smb_share_put(smp->sm_share, &scred); 254 mp->mnt_data = (qaddr_t)0; 255 256 if (smp->sm_hash) 257 free(smp->sm_hash, M_SMBFSHASH); 258 lockdestroy(&smp->sm_hashlock); 259 #ifdef SMBFS_USEZONE 260 zfree(smbfsmount_zone, smp); 261 #else 262 free(smp, M_SMBFSDATA); 263 #endif 264 mp->mnt_flag &= ~MNT_LOCAL; 265 return error; 266 } 267 268 /* 269 * Return locked root vnode of a filesystem 270 */ 271 static int 272 smbfs_root(struct mount *mp, struct vnode **vpp) 273 { 274 struct smbmount *smp = VFSTOSMBFS(mp); 275 struct vnode *vp; 276 struct smbnode *np; 277 struct smbfattr fattr; 278 struct thread *td = curthread; 279 struct ucred *cred = td->td_ucred; 280 struct smb_cred scred; 281 int error; 282 283 if (smp == NULL) { 284 SMBERROR("smp == NULL (bug in umount)\n"); 285 return EINVAL; 286 } 287 if (smp->sm_root) { 288 *vpp = SMBTOV(smp->sm_root); 289 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 290 } 291 smb_makescred(&scred, td, cred); 292 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 293 if (error) 294 return error; 295 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 296 if (error) 297 return error; 298 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 299 vp->v_vflag |= VV_ROOT; 300 np = VTOSMB(vp); 301 smp->sm_root = np; 302 *vpp = vp; 303 return 0; 304 } 305 306 /* 307 * Vfs start routine, a no-op. 308 */ 309 /* ARGSUSED */ 310 static int 311 smbfs_start(mp, flags, td) 312 struct mount *mp; 313 int flags; 314 struct thread *td; 315 { 316 SMBVDEBUG("flags=%04x\n", flags); 317 return 0; 318 } 319 320 /* 321 * Do operations associated with quotas, not supported 322 */ 323 /* ARGSUSED */ 324 static int 325 smbfs_quotactl(mp, cmd, uid, arg, td) 326 struct mount *mp; 327 int cmd; 328 uid_t uid; 329 caddr_t arg; 330 struct thread *td; 331 { 332 SMBVDEBUG("return EOPNOTSUPP\n"); 333 return EOPNOTSUPP; 334 } 335 336 /*ARGSUSED*/ 337 int 338 smbfs_init(struct vfsconf *vfsp) 339 { 340 #ifndef SMP 341 int name[2]; 342 int olen, ncpu, plen, error; 343 344 name[0] = CTL_HW; 345 name[1] = HW_NCPU; 346 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 347 if (error == 0 && ncpu > 1) 348 printf("warning: smbfs module compiled without SMP support."); 349 #endif 350 351 #ifdef SMBFS_USEZONE 352 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 353 #endif 354 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 355 SMBVDEBUG("done.\n"); 356 return 0; 357 } 358 359 /*ARGSUSED*/ 360 int 361 smbfs_uninit(struct vfsconf *vfsp) 362 { 363 364 SMBVDEBUG("done.\n"); 365 return 0; 366 } 367 368 /* 369 * smbfs_statfs call 370 */ 371 int 372 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 373 { 374 struct smbmount *smp = VFSTOSMBFS(mp); 375 struct smbnode *np = smp->sm_root; 376 struct smb_share *ssp = smp->sm_share; 377 struct smb_cred scred; 378 int error = 0; 379 380 if (np == NULL) 381 return EINVAL; 382 383 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 384 sbp->f_spare2 = 0; /* placeholder */ 385 smb_makescred(&scred, td, td->td_ucred); 386 387 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 388 error = smbfs_smb_statfs2(ssp, sbp, &scred); 389 else 390 error = smbfs_smb_statfs(ssp, sbp, &scred); 391 if (error) 392 return error; 393 sbp->f_flags = 0; /* copy of mount exported flags */ 394 if (sbp != &mp->mnt_stat) { 395 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 396 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 397 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 398 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 399 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 400 } 401 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 402 return 0; 403 } 404 405 /* 406 * Flush out the buffer cache 407 */ 408 /* ARGSUSED */ 409 static int 410 smbfs_sync(mp, waitfor, cred, td) 411 struct mount *mp; 412 int waitfor; 413 struct ucred *cred; 414 struct thread *td; 415 { 416 struct vnode *vp; 417 int error, allerror = 0; 418 /* 419 * Force stale buffer cache information to be flushed. 420 */ 421 loop: 422 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 423 vp != NULL; 424 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 425 /* 426 * If the vnode that we are about to sync is no longer 427 * associated with this mount point, start over. 428 */ 429 if (vp->v_mount != mp) 430 goto loop; 431 VI_LOCK(vp); 432 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 433 waitfor == MNT_LAZY) { 434 VI_UNLOCK(vp); 435 continue; 436 } 437 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) 438 goto loop; 439 error = VOP_FSYNC(vp, cred, waitfor, td); 440 if (error) 441 allerror = error; 442 vput(vp); 443 } 444 return (allerror); 445 } 446 447