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_unmount(struct mount *, int, struct thread *); 87 static int smbfs_init(struct vfsconf *vfsp); 88 static int smbfs_uninit(struct vfsconf *vfsp); 89 90 static struct vfsops smbfs_vfsops = { 91 smbfs_mount, 92 smbfs_start, 93 smbfs_unmount, 94 smbfs_root, 95 smbfs_quotactl, 96 smbfs_statfs, 97 vfs_stdsync, 98 vfs_stdvget, 99 vfs_stdfhtovp, /* shouldn't happen */ 100 vfs_stdcheckexp, 101 vfs_stdvptofh, /* shouldn't happen */ 102 smbfs_init, 103 smbfs_uninit, 104 vfs_stdextattrctl 105 }; 106 107 108 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 109 110 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 111 MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 112 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 113 114 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 115 116 static int 117 smbfs_mount(struct mount *mp, char *path, caddr_t data, 118 struct nameidata *ndp, struct thread *td) 119 { 120 struct smbfs_args args; /* will hold data from mount request */ 121 struct smbmount *smp = NULL; 122 struct smb_vc *vcp; 123 struct smb_share *ssp = NULL; 124 struct vnode *vp; 125 struct smb_cred scred; 126 int error; 127 char *pc, *pe; 128 129 if (data == NULL) { 130 printf("missing data argument\n"); 131 return EINVAL; 132 } 133 if (mp->mnt_flag & MNT_UPDATE) { 134 printf("MNT_UPDATE not implemented"); 135 return EOPNOTSUPP; 136 } 137 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 138 if (error) 139 return error; 140 if (args.version != SMBFS_VERSION) { 141 printf("mount version mismatch: kernel=%d, mount=%d\n", 142 SMBFS_VERSION, args.version); 143 return EINVAL; 144 } 145 smb_makescred(&scred, td, td->td_ucred); 146 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 147 if (error) { 148 printf("invalid device handle %d (%d)\n", args.dev, error); 149 return error; 150 } 151 vcp = SSTOVC(ssp); 152 smb_share_unlock(ssp, 0, td); 153 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 154 155 #ifdef SMBFS_USEZONE 156 smp = zalloc(smbfsmount_zone); 157 #else 158 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE); 159 #endif 160 if (smp == NULL) { 161 printf("could not alloc smbmount\n"); 162 error = ENOMEM; 163 goto bad; 164 } 165 bzero(smp, sizeof(*smp)); 166 mp->mnt_data = (qaddr_t)smp; 167 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 168 if (smp->sm_hash == NULL) 169 goto bad; 170 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 171 smp->sm_share = ssp; 172 smp->sm_root = NULL; 173 smp->sm_args = args; 174 smp->sm_caseopt = args.caseopt; 175 smp->sm_args.file_mode = (smp->sm_args.file_mode & 176 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 177 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 178 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 179 180 /* simple_lock_init(&smp->sm_npslock);*/ 181 pc = mp->mnt_stat.f_mntfromname; 182 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 183 bzero(pc, MNAMELEN); 184 *pc++ = '/'; 185 *pc++ = '/'; 186 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 187 if (pc < pe-1) { 188 *(pc++) = '@'; 189 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 190 if (pc < pe - 1) { 191 *(pc++) = '/'; 192 strncpy(pc, ssp->ss_name, pe - pc - 2); 193 } 194 } 195 /* protect against invalid mount points */ 196 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 197 vfs_getnewfsid(mp); 198 error = smbfs_root(mp, &vp); 199 if (error) 200 goto bad; 201 VOP_UNLOCK(vp, 0, td); 202 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 203 204 #ifdef DIAGNOSTICS 205 SMBERROR("mp=%p\n", mp); 206 #endif 207 return error; 208 bad: 209 if (smp) { 210 if (smp->sm_hash) 211 free(smp->sm_hash, M_SMBFSHASH); 212 lockdestroy(&smp->sm_hashlock); 213 #ifdef SMBFS_USEZONE 214 zfree(smbfsmount_zone, smp); 215 #else 216 free(smp, M_SMBFSDATA); 217 #endif 218 } 219 if (ssp) 220 smb_share_put(ssp, &scred); 221 return error; 222 } 223 224 /* Unmount the filesystem described by mp. */ 225 static int 226 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 227 { 228 struct smbmount *smp = VFSTOSMBFS(mp); 229 struct smb_cred scred; 230 int error, flags; 231 232 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 233 flags = 0; 234 if (mntflags & MNT_FORCE) 235 flags |= FORCECLOSE; 236 /* 237 * Keep trying to flush the vnode list for the mount while 238 * some are still busy and we are making progress towards 239 * making them not busy. This is needed because smbfs vnodes 240 * reference their parent directory but may appear after their 241 * parent in the list; one pass over the vnode list is not 242 * sufficient in this case. 243 */ 244 do { 245 smp->sm_didrele = 0; 246 /* There is 1 extra root vnode reference from smbfs_mount(). */ 247 error = vflush(mp, 1, flags); 248 } while (error == EBUSY && smp->sm_didrele != 0); 249 if (error) 250 return error; 251 smb_makescred(&scred, td, td->td_ucred); 252 smb_share_put(smp->sm_share, &scred); 253 mp->mnt_data = (qaddr_t)0; 254 255 if (smp->sm_hash) 256 free(smp->sm_hash, M_SMBFSHASH); 257 lockdestroy(&smp->sm_hashlock); 258 #ifdef SMBFS_USEZONE 259 zfree(smbfsmount_zone, smp); 260 #else 261 free(smp, M_SMBFSDATA); 262 #endif 263 mp->mnt_flag &= ~MNT_LOCAL; 264 return error; 265 } 266 267 /* 268 * Return locked root vnode of a filesystem 269 */ 270 static int 271 smbfs_root(struct mount *mp, struct vnode **vpp) 272 { 273 struct smbmount *smp = VFSTOSMBFS(mp); 274 struct vnode *vp; 275 struct smbnode *np; 276 struct smbfattr fattr; 277 struct thread *td = curthread; 278 struct ucred *cred = td->td_ucred; 279 struct smb_cred scred; 280 int error; 281 282 if (smp == NULL) { 283 SMBERROR("smp == NULL (bug in umount)\n"); 284 return EINVAL; 285 } 286 if (smp->sm_root) { 287 *vpp = SMBTOV(smp->sm_root); 288 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 289 } 290 smb_makescred(&scred, td, cred); 291 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 292 if (error) 293 return error; 294 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 295 if (error) 296 return error; 297 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 298 vp->v_vflag |= VV_ROOT; 299 np = VTOSMB(vp); 300 smp->sm_root = np; 301 *vpp = vp; 302 return 0; 303 } 304 305 /* 306 * Vfs start routine, a no-op. 307 */ 308 /* ARGSUSED */ 309 static int 310 smbfs_start(mp, flags, td) 311 struct mount *mp; 312 int flags; 313 struct thread *td; 314 { 315 SMBVDEBUG("flags=%04x\n", flags); 316 return 0; 317 } 318 319 /* 320 * Do operations associated with quotas, not supported 321 */ 322 /* ARGSUSED */ 323 static int 324 smbfs_quotactl(mp, cmd, uid, arg, td) 325 struct mount *mp; 326 int cmd; 327 uid_t uid; 328 caddr_t arg; 329 struct thread *td; 330 { 331 SMBVDEBUG("return EOPNOTSUPP\n"); 332 return EOPNOTSUPP; 333 } 334 335 /*ARGSUSED*/ 336 int 337 smbfs_init(struct vfsconf *vfsp) 338 { 339 #ifndef SMP 340 int name[2]; 341 int olen, ncpu, plen, error; 342 343 name[0] = CTL_HW; 344 name[1] = HW_NCPU; 345 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 346 if (error == 0 && ncpu > 1) 347 printf("warning: smbfs module compiled without SMP support."); 348 #endif 349 350 #ifdef SMBFS_USEZONE 351 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 352 #endif 353 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 354 SMBVDEBUG("done.\n"); 355 return 0; 356 } 357 358 /*ARGSUSED*/ 359 int 360 smbfs_uninit(struct vfsconf *vfsp) 361 { 362 363 SMBVDEBUG("done.\n"); 364 return 0; 365 } 366 367 /* 368 * smbfs_statfs call 369 */ 370 int 371 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 372 { 373 struct smbmount *smp = VFSTOSMBFS(mp); 374 struct smbnode *np = smp->sm_root; 375 struct smb_share *ssp = smp->sm_share; 376 struct smb_cred scred; 377 int error = 0; 378 379 if (np == NULL) 380 return EINVAL; 381 382 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 383 sbp->f_spare2 = 0; /* placeholder */ 384 smb_makescred(&scred, td, td->td_ucred); 385 386 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 387 error = smbfs_smb_statfs2(ssp, sbp, &scred); 388 else 389 error = smbfs_smb_statfs(ssp, sbp, &scred); 390 if (error) 391 return error; 392 sbp->f_flags = 0; /* copy of mount exported flags */ 393 if (sbp != &mp->mnt_stat) { 394 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 395 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 396 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 397 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 398 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 399 } 400 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 401 return 0; 402 } 403