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 #ifndef FB_CURRENT 128 size_t size; 129 #endif 130 int error; 131 char *pc, *pe; 132 133 if (data == NULL) { 134 printf("missing data argument\n"); 135 return EINVAL; 136 } 137 if (mp->mnt_flag & MNT_UPDATE) { 138 printf("MNT_UPDATE not implemented"); 139 return EOPNOTSUPP; 140 } 141 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 142 if (error) 143 return error; 144 if (args.version != SMBFS_VERSION) { 145 printf("mount version mismatch: kernel=%d, mount=%d\n", 146 SMBFS_VERSION, args.version); 147 return EINVAL; 148 } 149 smb_makescred(&scred, td, td->td_ucred); 150 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 151 if (error) { 152 printf("invalid device handle %d (%d)\n", args.dev, error); 153 return error; 154 } 155 vcp = SSTOVC(ssp); 156 smb_share_unlock(ssp, 0, td); 157 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 158 159 #ifdef SMBFS_USEZONE 160 smp = zalloc(smbfsmount_zone); 161 #else 162 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE); 163 #endif 164 if (smp == NULL) { 165 printf("could not alloc smbmount\n"); 166 error = ENOMEM; 167 goto bad; 168 } 169 bzero(smp, sizeof(*smp)); 170 mp->mnt_data = (qaddr_t)smp; 171 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 172 if (smp->sm_hash == NULL) 173 goto bad; 174 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 175 smp->sm_share = ssp; 176 smp->sm_root = NULL; 177 smp->sm_args = args; 178 smp->sm_caseopt = args.caseopt; 179 smp->sm_args.file_mode = (smp->sm_args.file_mode & 180 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 181 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 182 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 183 184 /* simple_lock_init(&smp->sm_npslock);*/ 185 #ifndef FB_CURRENT 186 error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 187 if (error) 188 goto bad; 189 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 190 #endif 191 pc = mp->mnt_stat.f_mntfromname; 192 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 193 bzero(pc, MNAMELEN); 194 *pc++ = '/'; 195 *pc++ = '/'; 196 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 197 if (pc < pe-1) { 198 *(pc++) = '@'; 199 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 200 if (pc < pe - 1) { 201 *(pc++) = '/'; 202 strncpy(pc, ssp->ss_name, pe - pc - 2); 203 } 204 } 205 /* protect against invalid mount points */ 206 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 207 vfs_getnewfsid(mp); 208 error = smbfs_root(mp, &vp); 209 if (error) 210 goto bad; 211 VOP_UNLOCK(vp, 0, td); 212 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 213 214 #ifdef DIAGNOSTICS 215 SMBERROR("mp=%p\n", mp); 216 #endif 217 return error; 218 bad: 219 if (smp) { 220 if (smp->sm_hash) 221 free(smp->sm_hash, M_SMBFSHASH); 222 lockdestroy(&smp->sm_hashlock); 223 #ifdef SMBFS_USEZONE 224 zfree(smbfsmount_zone, smp); 225 #else 226 free(smp, M_SMBFSDATA); 227 #endif 228 } 229 if (ssp) 230 smb_share_put(ssp, &scred); 231 return error; 232 } 233 234 /* Unmount the filesystem described by mp. */ 235 static int 236 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 237 { 238 struct smbmount *smp = VFSTOSMBFS(mp); 239 struct smb_cred scred; 240 int error, flags; 241 242 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 243 flags = 0; 244 if (mntflags & MNT_FORCE) 245 flags |= FORCECLOSE; 246 /* There is 1 extra root vnode reference from smbfs_mount(). */ 247 error = vflush(mp, 1, flags); 248 if (error) 249 return error; 250 smb_makescred(&scred, td, td->td_ucred); 251 smb_share_put(smp->sm_share, &scred); 252 mp->mnt_data = (qaddr_t)0; 253 254 if (smp->sm_hash) 255 free(smp->sm_hash, M_SMBFSHASH); 256 lockdestroy(&smp->sm_hashlock); 257 #ifdef SMBFS_USEZONE 258 zfree(smbfsmount_zone, smp); 259 #else 260 free(smp, M_SMBFSDATA); 261 #endif 262 mp->mnt_flag &= ~MNT_LOCAL; 263 return error; 264 } 265 266 /* 267 * Return locked root vnode of a filesystem 268 */ 269 static int 270 smbfs_root(struct mount *mp, struct vnode **vpp) 271 { 272 struct smbmount *smp = VFSTOSMBFS(mp); 273 struct vnode *vp; 274 struct smbnode *np; 275 struct smbfattr fattr; 276 struct thread *td = curthread; 277 struct ucred *cred = td->td_ucred; 278 struct smb_cred scred; 279 int error; 280 281 if (smp == NULL) { 282 SMBERROR("smp == NULL (bug in umount)\n"); 283 return EINVAL; 284 } 285 if (smp->sm_root) { 286 *vpp = SMBTOV(smp->sm_root); 287 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 288 } 289 smb_makescred(&scred, td, cred); 290 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 291 if (error) 292 return error; 293 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 294 if (error) 295 return error; 296 vp->v_flag |= VROOT; 297 np = VTOSMB(vp); 298 smp->sm_root = np; 299 *vpp = vp; 300 return 0; 301 } 302 303 /* 304 * Vfs start routine, a no-op. 305 */ 306 /* ARGSUSED */ 307 static int 308 smbfs_start(mp, flags, td) 309 struct mount *mp; 310 int flags; 311 struct thread *td; 312 { 313 SMBVDEBUG("flags=%04x\n", flags); 314 return 0; 315 } 316 317 /* 318 * Do operations associated with quotas, not supported 319 */ 320 /* ARGSUSED */ 321 static int 322 smbfs_quotactl(mp, cmd, uid, arg, td) 323 struct mount *mp; 324 int cmd; 325 uid_t uid; 326 caddr_t arg; 327 struct thread *td; 328 { 329 SMBVDEBUG("return EOPNOTSUPP\n"); 330 return EOPNOTSUPP; 331 } 332 333 /*ARGSUSED*/ 334 int 335 smbfs_init(struct vfsconf *vfsp) 336 { 337 #ifndef SMP 338 int name[2]; 339 int olen, ncpu, plen, error; 340 341 name[0] = CTL_HW; 342 name[1] = HW_NCPU; 343 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 344 if (error == 0 && ncpu > 1) 345 printf("warning: smbfs module compiled without SMP support."); 346 #endif 347 348 #ifdef SMBFS_USEZONE 349 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 350 #endif 351 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 352 SMBVDEBUG("done.\n"); 353 return 0; 354 } 355 356 /*ARGSUSED*/ 357 int 358 smbfs_uninit(struct vfsconf *vfsp) 359 { 360 361 SMBVDEBUG("done.\n"); 362 return 0; 363 } 364 365 /* 366 * smbfs_statfs call 367 */ 368 int 369 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 370 { 371 struct smbmount *smp = VFSTOSMBFS(mp); 372 struct smbnode *np = smp->sm_root; 373 struct smb_share *ssp = smp->sm_share; 374 struct smb_cred scred; 375 int error = 0; 376 377 if (np == NULL) 378 return EINVAL; 379 380 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 381 sbp->f_spare2 = 0; /* placeholder */ 382 smb_makescred(&scred, td, td->td_ucred); 383 384 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 385 error = smbfs_smb_statfs2(ssp, sbp, &scred); 386 else 387 error = smbfs_smb_statfs(ssp, sbp, &scred); 388 if (error) 389 return error; 390 sbp->f_flags = 0; /* copy of mount exported flags */ 391 if (sbp != &mp->mnt_stat) { 392 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 393 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 394 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 395 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 396 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 397 } 398 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 399 return 0; 400 } 401 402 /* 403 * Flush out the buffer cache 404 */ 405 /* ARGSUSED */ 406 static int 407 smbfs_sync(mp, waitfor, cred, td) 408 struct mount *mp; 409 int waitfor; 410 struct ucred *cred; 411 struct thread *td; 412 { 413 struct vnode *vp; 414 int error, allerror = 0; 415 /* 416 * Force stale buffer cache information to be flushed. 417 */ 418 loop: 419 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 420 vp != NULL; 421 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 422 /* 423 * If the vnode that we are about to sync is no longer 424 * associated with this mount point, start over. 425 */ 426 if (vp->v_mount != mp) 427 goto loop; 428 #ifndef FB_RELENG3 429 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 430 #else 431 if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 432 #endif 433 waitfor == MNT_LAZY) 434 continue; 435 if (vget(vp, LK_EXCLUSIVE, td)) 436 goto loop; 437 error = VOP_FSYNC(vp, cred, waitfor, td); 438 if (error) 439 allerror = error; 440 vput(vp); 441 } 442 return (allerror); 443 } 444 445