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_mount_t smbfs_mount; 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_mount = smbfs_mount, 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_mount(struct mount *mp, char *path, caddr_t data, 111 struct nameidata *ndp, struct thread *td) 112 { 113 struct smbfs_args args; /* will hold data from mount request */ 114 struct smbmount *smp = NULL; 115 struct smb_vc *vcp; 116 struct smb_share *ssp = NULL; 117 struct vnode *vp; 118 struct smb_cred scred; 119 int error; 120 char *pc, *pe; 121 122 if (data == NULL) { 123 printf("missing data argument\n"); 124 return EINVAL; 125 } 126 if (mp->mnt_flag & MNT_UPDATE) { 127 printf("MNT_UPDATE not implemented"); 128 return EOPNOTSUPP; 129 } 130 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 131 if (error) 132 return error; 133 if (args.version != SMBFS_VERSION) { 134 printf("mount version mismatch: kernel=%d, mount=%d\n", 135 SMBFS_VERSION, args.version); 136 return EINVAL; 137 } 138 smb_makescred(&scred, td, td->td_ucred); 139 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 140 if (error) { 141 printf("invalid device handle %d (%d)\n", args.dev, error); 142 return error; 143 } 144 vcp = SSTOVC(ssp); 145 smb_share_unlock(ssp, 0, td); 146 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 147 148 #ifdef SMBFS_USEZONE 149 smp = zalloc(smbfsmount_zone); 150 #else 151 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, 152 M_WAITOK|M_USE_RESERVE); 153 #endif 154 if (smp == NULL) { 155 printf("could not alloc smbmount\n"); 156 error = ENOMEM; 157 goto bad; 158 } 159 bzero(smp, sizeof(*smp)); 160 mp->mnt_data = (qaddr_t)smp; 161 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 162 if (smp->sm_hash == NULL) 163 goto bad; 164 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 165 smp->sm_share = ssp; 166 smp->sm_root = NULL; 167 smp->sm_args = args; 168 smp->sm_caseopt = args.caseopt; 169 smp->sm_args.file_mode = (smp->sm_args.file_mode & 170 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 171 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 172 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 173 174 /* simple_lock_init(&smp->sm_npslock);*/ 175 pc = mp->mnt_stat.f_mntfromname; 176 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 177 bzero(pc, MNAMELEN); 178 *pc++ = '/'; 179 *pc++ = '/'; 180 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 181 if (pc < pe-1) { 182 *(pc++) = '@'; 183 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 184 if (pc < pe - 1) { 185 *(pc++) = '/'; 186 strncpy(pc, ssp->ss_name, pe - pc - 2); 187 } 188 } 189 /* protect against invalid mount points */ 190 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 191 vfs_getnewfsid(mp); 192 error = smbfs_root(mp, &vp, td); 193 if (error) 194 goto bad; 195 VOP_UNLOCK(vp, 0, td); 196 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 197 198 #ifdef DIAGNOSTICS 199 SMBERROR("mp=%p\n", mp); 200 #endif 201 return error; 202 bad: 203 if (smp) { 204 if (smp->sm_hash) 205 free(smp->sm_hash, M_SMBFSHASH); 206 lockdestroy(&smp->sm_hashlock); 207 #ifdef SMBFS_USEZONE 208 zfree(smbfsmount_zone, smp); 209 #else 210 free(smp, M_SMBFSDATA); 211 #endif 212 } 213 if (ssp) 214 smb_share_put(ssp, &scred); 215 return error; 216 } 217 218 /* Unmount the filesystem described by mp. */ 219 static int 220 smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 221 { 222 struct smbmount *smp = VFSTOSMBFS(mp); 223 struct smb_cred scred; 224 int error, flags; 225 226 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 227 flags = 0; 228 if (mntflags & MNT_FORCE) 229 flags |= FORCECLOSE; 230 /* 231 * Keep trying to flush the vnode list for the mount while 232 * some are still busy and we are making progress towards 233 * making them not busy. This is needed because smbfs vnodes 234 * reference their parent directory but may appear after their 235 * parent in the list; one pass over the vnode list is not 236 * sufficient in this case. 237 */ 238 do { 239 smp->sm_didrele = 0; 240 /* There is 1 extra root vnode reference from smbfs_mount(). */ 241 error = vflush(mp, 1, flags, td); 242 } while (error == EBUSY && smp->sm_didrele != 0); 243 if (error) 244 return error; 245 smb_makescred(&scred, td, td->td_ucred); 246 smb_share_put(smp->sm_share, &scred); 247 mp->mnt_data = (qaddr_t)0; 248 249 if (smp->sm_hash) 250 free(smp->sm_hash, M_SMBFSHASH); 251 lockdestroy(&smp->sm_hashlock); 252 #ifdef SMBFS_USEZONE 253 zfree(smbfsmount_zone, smp); 254 #else 255 free(smp, M_SMBFSDATA); 256 #endif 257 mp->mnt_flag &= ~MNT_LOCAL; 258 return error; 259 } 260 261 /* 262 * Return locked root vnode of a filesystem 263 */ 264 static int 265 smbfs_root(struct mount *mp, struct vnode **vpp, struct thread *td) 266 { 267 struct smbmount *smp = VFSTOSMBFS(mp); 268 struct vnode *vp; 269 struct smbnode *np; 270 struct smbfattr fattr; 271 struct ucred *cred = td->td_ucred; 272 struct smb_cred scred; 273 int error; 274 275 if (smp == NULL) { 276 SMBERROR("smp == NULL (bug in umount)\n"); 277 return EINVAL; 278 } 279 if (smp->sm_root) { 280 *vpp = SMBTOV(smp->sm_root); 281 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 282 } 283 smb_makescred(&scred, td, cred); 284 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 285 if (error) 286 return error; 287 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 288 if (error) 289 return error; 290 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 291 vp->v_vflag |= VV_ROOT; 292 np = VTOSMB(vp); 293 smp->sm_root = np; 294 *vpp = vp; 295 return 0; 296 } 297 298 /* 299 * Vfs start routine, a no-op. 300 */ 301 /* ARGSUSED */ 302 static int 303 smbfs_start(mp, flags, td) 304 struct mount *mp; 305 int flags; 306 struct thread *td; 307 { 308 SMBVDEBUG("flags=%04x\n", flags); 309 return 0; 310 } 311 312 /* 313 * Do operations associated with quotas, not supported 314 */ 315 /* ARGSUSED */ 316 static int 317 smbfs_quotactl(mp, cmd, uid, arg, td) 318 struct mount *mp; 319 int cmd; 320 uid_t uid; 321 caddr_t arg; 322 struct thread *td; 323 { 324 SMBVDEBUG("return EOPNOTSUPP\n"); 325 return EOPNOTSUPP; 326 } 327 328 /*ARGSUSED*/ 329 int 330 smbfs_init(struct vfsconf *vfsp) 331 { 332 #ifdef SMBFS_USEZONE 333 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 334 #endif 335 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 336 SMBVDEBUG("done.\n"); 337 return 0; 338 } 339 340 /*ARGSUSED*/ 341 int 342 smbfs_uninit(struct vfsconf *vfsp) 343 { 344 345 SMBVDEBUG("done.\n"); 346 return 0; 347 } 348 349 /* 350 * smbfs_statfs call 351 */ 352 int 353 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 354 { 355 struct smbmount *smp = VFSTOSMBFS(mp); 356 struct smbnode *np = smp->sm_root; 357 struct smb_share *ssp = smp->sm_share; 358 struct smb_cred scred; 359 int error = 0; 360 361 if (np == NULL) 362 return EINVAL; 363 364 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 365 smb_makescred(&scred, td, td->td_ucred); 366 367 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 368 error = smbfs_smb_statfs2(ssp, sbp, &scred); 369 else 370 error = smbfs_smb_statfs(ssp, sbp, &scred); 371 if (error) 372 return error; 373 sbp->f_flags = 0; /* copy of mount exported flags */ 374 if (sbp != &mp->mnt_stat) { 375 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 376 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 377 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 378 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 379 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 380 } 381 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 382 return 0; 383 } 384