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 static vfs_init_t smbfs_init; 80 static vfs_uninit_t smbfs_uninit; 81 static vfs_omount_t smbfs_omount; 82 static vfs_start_t smbfs_start; 83 static vfs_root_t smbfs_root; 84 static vfs_quotactl_t smbfs_quotactl; 85 static vfs_statfs_t smbfs_statfs; 86 static vfs_unmount_t smbfs_unmount; 87 88 static struct vfsops smbfs_vfsops = { 89 .vfs_init = smbfs_init, 90 .vfs_omount = smbfs_omount, 91 .vfs_quotactl = smbfs_quotactl, 92 .vfs_root = smbfs_root, 93 .vfs_start = smbfs_start, 94 .vfs_statfs = smbfs_statfs, 95 .vfs_sync = vfs_stdsync, 96 .vfs_uninit = smbfs_uninit, 97 .vfs_unmount = smbfs_unmount, 98 }; 99 100 101 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 102 103 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 104 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 105 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 106 107 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 108 109 static int 110 smbfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td) 111 { 112 struct smbfs_args args; /* will hold data from mount request */ 113 struct smbmount *smp = NULL; 114 struct smb_vc *vcp; 115 struct smb_share *ssp = NULL; 116 struct vnode *vp; 117 struct smb_cred scred; 118 int error; 119 char *pc, *pe; 120 121 if (data == NULL) { 122 printf("missing data argument\n"); 123 return EINVAL; 124 } 125 if (mp->mnt_flag & MNT_UPDATE) { 126 printf("MNT_UPDATE not implemented"); 127 return EOPNOTSUPP; 128 } 129 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 130 if (error) 131 return error; 132 if (args.version != SMBFS_VERSION) { 133 printf("mount version mismatch: kernel=%d, mount=%d\n", 134 SMBFS_VERSION, args.version); 135 return EINVAL; 136 } 137 smb_makescred(&scred, td, td->td_ucred); 138 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 139 if (error) { 140 printf("invalid device handle %d (%d)\n", args.dev, error); 141 return error; 142 } 143 vcp = SSTOVC(ssp); 144 smb_share_unlock(ssp, 0, td); 145 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 146 147 #ifdef SMBFS_USEZONE 148 smp = zalloc(smbfsmount_zone); 149 #else 150 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, 151 M_WAITOK|M_USE_RESERVE); 152 #endif 153 if (smp == NULL) { 154 printf("could not alloc smbmount\n"); 155 error = ENOMEM; 156 goto bad; 157 } 158 bzero(smp, sizeof(*smp)); 159 mp->mnt_data = (qaddr_t)smp; 160 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 161 if (smp->sm_hash == NULL) 162 goto bad; 163 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 164 smp->sm_share = ssp; 165 smp->sm_root = NULL; 166 smp->sm_args = args; 167 smp->sm_caseopt = args.caseopt; 168 smp->sm_args.file_mode = (smp->sm_args.file_mode & 169 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 170 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 171 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 172 173 /* simple_lock_init(&smp->sm_npslock);*/ 174 pc = mp->mnt_stat.f_mntfromname; 175 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 176 bzero(pc, MNAMELEN); 177 *pc++ = '/'; 178 *pc++ = '/'; 179 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 180 if (pc < pe-1) { 181 *(pc++) = '@'; 182 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 183 if (pc < pe - 1) { 184 *(pc++) = '/'; 185 strncpy(pc, ssp->ss_name, pe - pc - 2); 186 } 187 } 188 /* protect against invalid mount points */ 189 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 190 vfs_getnewfsid(mp); 191 error = smbfs_root(mp, &vp, td); 192 if (error) 193 goto bad; 194 VOP_UNLOCK(vp, 0, td); 195 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 196 197 #ifdef DIAGNOSTICS 198 SMBERROR("mp=%p\n", mp); 199 #endif 200 return error; 201 bad: 202 if (smp) { 203 if (smp->sm_hash) 204 free(smp->sm_hash, M_SMBFSHASH); 205 lockdestroy(&smp->sm_hashlock); 206 #ifdef SMBFS_USEZONE 207 zfree(smbfsmount_zone, smp); 208 #else 209 free(smp, M_SMBFSDATA); 210 #endif 211 } 212 if (ssp) 213 smb_share_put(ssp, &scred); 214 return error; 215 } 216 217 /* Unmount the filesystem described by mp. */ 218 static int 219 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 220 { 221 struct smbmount *smp = VFSTOSMBFS(mp); 222 struct smb_cred scred; 223 int error, flags; 224 225 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 226 flags = 0; 227 if (mntflags & MNT_FORCE) 228 flags |= FORCECLOSE; 229 /* 230 * Keep trying to flush the vnode list for the mount while 231 * some are still busy and we are making progress towards 232 * making them not busy. This is needed because smbfs vnodes 233 * reference their parent directory but may appear after their 234 * parent in the list; one pass over the vnode list is not 235 * sufficient in this case. 236 */ 237 do { 238 smp->sm_didrele = 0; 239 /* There is 1 extra root vnode reference from smbfs_mount(). */ 240 error = vflush(mp, 1, flags, td); 241 } while (error == EBUSY && smp->sm_didrele != 0); 242 if (error) 243 return error; 244 smb_makescred(&scred, td, td->td_ucred); 245 smb_share_put(smp->sm_share, &scred); 246 mp->mnt_data = (qaddr_t)0; 247 248 if (smp->sm_hash) 249 free(smp->sm_hash, M_SMBFSHASH); 250 lockdestroy(&smp->sm_hashlock); 251 #ifdef SMBFS_USEZONE 252 zfree(smbfsmount_zone, smp); 253 #else 254 free(smp, M_SMBFSDATA); 255 #endif 256 mp->mnt_flag &= ~MNT_LOCAL; 257 return error; 258 } 259 260 /* 261 * Return locked root vnode of a filesystem 262 */ 263 static int 264 smbfs_root(struct mount *mp, struct vnode **vpp, struct thread *td) 265 { 266 struct smbmount *smp = VFSTOSMBFS(mp); 267 struct vnode *vp; 268 struct smbnode *np; 269 struct smbfattr fattr; 270 struct ucred *cred = td->td_ucred; 271 struct smb_cred scred; 272 int error; 273 274 if (smp == NULL) { 275 SMBERROR("smp == NULL (bug in umount)\n"); 276 return EINVAL; 277 } 278 if (smp->sm_root) { 279 *vpp = SMBTOV(smp->sm_root); 280 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 281 } 282 smb_makescred(&scred, td, cred); 283 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 284 if (error) 285 return error; 286 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 287 if (error) 288 return error; 289 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 290 vp->v_vflag |= VV_ROOT; 291 np = VTOSMB(vp); 292 smp->sm_root = np; 293 *vpp = vp; 294 return 0; 295 } 296 297 /* 298 * Vfs start routine, a no-op. 299 */ 300 /* ARGSUSED */ 301 static int 302 smbfs_start(mp, flags, td) 303 struct mount *mp; 304 int flags; 305 struct thread *td; 306 { 307 SMBVDEBUG("flags=%04x\n", flags); 308 return 0; 309 } 310 311 /* 312 * Do operations associated with quotas, not supported 313 */ 314 /* ARGSUSED */ 315 static int 316 smbfs_quotactl(mp, cmd, uid, arg, td) 317 struct mount *mp; 318 int cmd; 319 uid_t uid; 320 caddr_t arg; 321 struct thread *td; 322 { 323 SMBVDEBUG("return EOPNOTSUPP\n"); 324 return EOPNOTSUPP; 325 } 326 327 /*ARGSUSED*/ 328 int 329 smbfs_init(struct vfsconf *vfsp) 330 { 331 #ifdef SMBFS_USEZONE 332 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 333 #endif 334 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 335 SMBVDEBUG("done.\n"); 336 return 0; 337 } 338 339 /*ARGSUSED*/ 340 int 341 smbfs_uninit(struct vfsconf *vfsp) 342 { 343 344 SMBVDEBUG("done.\n"); 345 return 0; 346 } 347 348 /* 349 * smbfs_statfs call 350 */ 351 int 352 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 353 { 354 struct smbmount *smp = VFSTOSMBFS(mp); 355 struct smbnode *np = smp->sm_root; 356 struct smb_share *ssp = smp->sm_share; 357 struct smb_cred scred; 358 int error = 0; 359 360 if (np == NULL) 361 return EINVAL; 362 363 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 364 smb_makescred(&scred, td, td->td_ucred); 365 366 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 367 error = smbfs_smb_statfs2(ssp, sbp, &scred); 368 else 369 error = smbfs_smb_statfs(ssp, sbp, &scred); 370 if (error) 371 return error; 372 sbp->f_flags = 0; /* copy of mount exported flags */ 373 if (sbp != &mp->mnt_stat) { 374 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 375 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 376 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 377 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 378 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 379 } 380 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 381 return 0; 382 } 383