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: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.2.2.5 2003/01/17 08:20:26 tjr Exp $ 33 */ 34 35 #ifndef KLD_MODULE 36 #include "opt_netsmb.h" 37 #ifndef NETSMB 38 #error "SMBFS requires option NETSMB" 39 #endif 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/stat.h> 50 #include <sys/malloc.h> 51 #include <sys/module.h> 52 53 54 #include <netproto/smb/smb.h> 55 #include <netproto/smb/smb_conn.h> 56 #include <netproto/smb/smb_subr.h> 57 #include <netproto/smb/smb_dev.h> 58 59 #include "smbfs.h" 60 #include "smbfs_node.h" 61 #include "smbfs_subr.h" 62 63 #include <sys/buf.h> 64 65 extern struct vop_ops smbfs_vnode_vops; 66 67 int smbfs_debuglevel = 0; 68 69 static int smbfs_version = SMBFS_VERSION; 70 71 #ifdef SMBFS_USEZONE 72 #include <vm/vm.h> 73 #include <vm/vm_extern.h> 74 #include <vm/vm_zone.h> 75 76 vm_zone_t smbfsmount_zone; 77 #endif 78 79 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); 80 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 81 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 82 83 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 84 85 86 static int smbfs_mount(struct mount *, char *, caddr_t, struct ucred *); 87 static int smbfs_root(struct mount *, struct vnode **); 88 static int smbfs_statfs(struct mount *, struct statfs *, struct ucred *); 89 static int smbfs_sync(struct mount *, int); 90 static int smbfs_unmount(struct mount *, int); 91 static int smbfs_init(struct vfsconf *vfsp); 92 static int smbfs_uninit(struct vfsconf *vfsp); 93 94 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 95 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 96 static int smbfs_fhtovp(struct mount *, struct fid *, 97 struct sockaddr *, struct vnode **, int *, 98 struct ucred **); 99 static int smbfs_vptofh(struct vnode *, struct fid *); 100 #endif 101 102 static struct vfsops smbfs_vfsops = { 103 .vfs_mount = smbfs_mount, 104 .vfs_unmount = smbfs_unmount, 105 .vfs_root = smbfs_root, 106 .vfs_statfs = smbfs_statfs, 107 .vfs_sync = smbfs_sync, 108 .vfs_init = smbfs_init, 109 .vfs_uninit = smbfs_uninit 110 }; 111 112 113 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 114 MODULE_VERSION(smbfs, 1); 115 116 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 117 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 118 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 119 120 long smbfs_pbuf_freecnt = -1; /* start out unlimited */ 121 122 static int 123 smbfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 124 { 125 struct smbfs_args args; /* will hold data from mount request */ 126 struct smbmount *smp = NULL; 127 struct smb_vc *vcp; 128 struct smb_share *ssp = NULL; 129 struct vnode *vp; 130 struct smb_cred scred; 131 int error; 132 char *pc, *pe; 133 134 if (data == NULL) { 135 kprintf("missing data argument\n"); 136 return EINVAL; 137 } 138 if (mp->mnt_flag & MNT_UPDATE) { 139 kprintf("MNT_UPDATE not implemented"); 140 return EOPNOTSUPP; 141 } 142 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 143 if (error) 144 return error; 145 if (args.version != SMBFS_VERSION) { 146 kprintf("mount version mismatch: kernel=%d, mount=%d\n", 147 SMBFS_VERSION, args.version); 148 return EINVAL; 149 } 150 smb_makescred(&scred, curthread, cred); 151 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 152 if (error) { 153 kprintf("invalid device handle %d (%d)\n", args.dev, error); 154 return error; 155 } 156 vcp = SSTOVC(ssp); 157 smb_share_unlock(ssp, 0); 158 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 159 160 #ifdef SMBFS_USEZONE 161 smp = zalloc(smbfsmount_zone); 162 #else 163 smp = kmalloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_USE_RESERVE); 164 #endif 165 if (smp == NULL) { 166 kprintf("could not alloc smbmount\n"); 167 error = ENOMEM; 168 goto bad; 169 } 170 bzero(smp, sizeof(*smp)); 171 mp->mnt_data = (qaddr_t)smp; 172 smp->sm_cred = crhold(cred); 173 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 174 if (smp->sm_hash == NULL) 175 goto bad; 176 lockinit(&smp->sm_hashlock, "smbfsh", 0, 0); 177 smp->sm_share = ssp; 178 smp->sm_root = NULL; 179 smp->sm_args = args; 180 smp->sm_caseopt = args.caseopt; 181 smp->sm_args.file_mode = (smp->sm_args.file_mode & 182 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 183 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 184 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 185 186 /* simple_lock_init(&smp->sm_npslock);*/ 187 pc = mp->mnt_stat.f_mntfromname; 188 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 189 bzero(pc, MNAMELEN); 190 *pc++ = '/'; 191 *pc++ = '/'; 192 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 193 if (pc < pe-1) { 194 *(pc++) = '@'; 195 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 196 if (pc < pe - 1) { 197 *(pc++) = '/'; 198 strncpy(pc, ssp->ss_name, pe - pc - 2); 199 } 200 } 201 /* protect against invalid mount points */ 202 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 203 vfs_getnewfsid(mp); 204 205 vfs_add_vnodeops(mp, &smbfs_vnode_vops, &mp->mnt_vn_norm_ops); 206 207 error = smbfs_root(mp, &vp); 208 if (error) 209 goto bad; 210 vn_unlock(vp); 211 SMBVDEBUG("root.v_sysrefs = %d\n", vp->v_sysref.refcnt); 212 213 #ifdef DIAGNOSTICS 214 SMBERROR("mp=%p\n", mp); 215 #endif 216 return error; 217 bad: 218 if (smp) { 219 if (smp->sm_cred) 220 crfree(smp->sm_cred); 221 if (smp->sm_hash) 222 hashdestroy(smp->sm_hash, M_SMBFSHASH, 223 smp->sm_hashlen); 224 lockdestroy(&smp->sm_hashlock); 225 #ifdef SMBFS_USEZONE 226 zfree(smbfsmount_zone, smp); 227 #else 228 kfree(smp, M_SMBFSDATA); 229 #endif 230 } 231 if (ssp) 232 smb_share_put(ssp, &scred); 233 return error; 234 } 235 236 /* Unmount the filesystem described by mp. */ 237 static int 238 smbfs_unmount(struct mount *mp, int mntflags) 239 { 240 struct smbmount *smp = VFSTOSMBFS(mp); 241 struct smb_cred scred; 242 int error, flags; 243 244 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 245 flags = 0; 246 if (mntflags & MNT_FORCE) 247 flags |= FORCECLOSE; 248 /* 249 * Keep trying to flush the vnode list for the mount while 250 * some are still busy and we are making progress towards 251 * making them not busy. This is needed because smbfs vnodes 252 * reference their parent directory but may appear after their 253 * parent in the list; one pass over the vnode list is not 254 * sufficient in this case. 255 */ 256 do { 257 smp->sm_didrele = 0; 258 /* There is 1 extra root vnode reference from smbfs_mount(). */ 259 error = vflush(mp, 1, flags); 260 } while (error == EBUSY && smp->sm_didrele != 0); 261 if (error) 262 return error; 263 smb_makescred(&scred, curthread, smp->sm_cred); 264 smb_share_put(smp->sm_share, &scred); 265 mp->mnt_data = (qaddr_t)0; 266 267 if (smp->sm_cred) 268 crfree(smp->sm_cred); 269 if (smp->sm_hash) 270 hashdestroy(smp->sm_hash, M_SMBFSHASH, smp->sm_hashlen); 271 lockdestroy(&smp->sm_hashlock); 272 #ifdef SMBFS_USEZONE 273 zfree(smbfsmount_zone, smp); 274 #else 275 kfree(smp, M_SMBFSDATA); 276 #endif 277 mp->mnt_flag &= ~MNT_LOCAL; 278 return error; 279 } 280 281 /* 282 * Return locked root vnode of a filesystem 283 */ 284 static int 285 smbfs_root(struct mount *mp, struct vnode **vpp) 286 { 287 struct thread *td = curthread; /* XXX */ 288 struct smbmount *smp = VFSTOSMBFS(mp); 289 struct vnode *vp; 290 struct smbnode *np; 291 struct smbfattr fattr; 292 struct ucred *cred; 293 struct smb_cred scred; 294 int error; 295 296 if (smp == NULL) { 297 SMBERROR("smp == NULL (bug in umount)\n"); 298 return EINVAL; 299 } 300 if (smp->sm_root) { 301 *vpp = SMBTOV(smp->sm_root); 302 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY); 303 } 304 if (td->td_proc) 305 cred = td->td_proc->p_ucred; 306 else 307 cred = proc0.p_ucred; 308 309 smb_makescred(&scred, td, cred); 310 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 311 if (error) 312 return error; 313 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 314 if (error) 315 return error; 316 vsetflags(vp, VROOT); 317 np = VTOSMB(vp); 318 smp->sm_root = np; 319 *vpp = vp; 320 return 0; 321 } 322 323 /*ARGSUSED*/ 324 int 325 smbfs_init(struct vfsconf *vfsp) 326 { 327 #ifdef SMBFS_USEZONE 328 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 329 #endif 330 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 331 SMBVDEBUG("done.\n"); 332 return 0; 333 } 334 335 /*ARGSUSED*/ 336 int 337 smbfs_uninit(struct vfsconf *vfsp) 338 { 339 SMBVDEBUG("done.\n"); 340 return 0; 341 } 342 343 /* 344 * smbfs_statfs call 345 */ 346 int 347 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 348 { 349 struct smbmount *smp = VFSTOSMBFS(mp); 350 struct smbnode *np = smp->sm_root; 351 struct smb_share *ssp = smp->sm_share; 352 struct smb_cred scred; 353 int error = 0; 354 355 if (np == NULL) 356 return EINVAL; 357 358 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 359 sbp->f_spare2 = 0; /* placeholder */ 360 smb_makescred(&scred, curthread, cred); 361 362 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 363 error = smbfs_smb_statfs2(ssp, sbp, &scred); 364 else 365 error = smbfs_smb_statfs(ssp, sbp, &scred); 366 if (error) 367 return error; 368 sbp->f_flags = 0; /* copy of mount exported flags */ 369 if (sbp != &mp->mnt_stat) { 370 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 371 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 372 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 373 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 374 } 375 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 376 return 0; 377 } 378 379 /* 380 * Flush out the buffer cache 381 */ 382 /* ARGSUSED */ 383 static int 384 smbfs_sync(struct mount *mp, int waitfor) 385 { 386 struct vnode *vp; 387 int error, allerror = 0; 388 /* 389 * Force stale buffer cache information to be flushed. 390 */ 391 loop: 392 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 393 vp != NULL; 394 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 395 /* 396 * If the vnode that we are about to sync is no longer 397 * associated with this mount point, start over. 398 */ 399 if (vp->v_mount != mp) 400 goto loop; 401 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) || 402 (waitfor & MNT_LAZY)) 403 continue; 404 if (vget(vp, LK_EXCLUSIVE)) 405 goto loop; 406 error = VOP_FSYNC(vp, waitfor, 0); 407 if (error) 408 allerror = error; 409 vput(vp); 410 } 411 return (allerror); 412 } 413 414 #if defined(__FreeBSD__) && __FreeBSD_version < 400009 415 /* 416 * smbfs flat namespace lookup. Unsupported. 417 */ 418 /* ARGSUSED */ 419 static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 420 { 421 return (EOPNOTSUPP); 422 } 423 424 /* ARGSUSED */ 425 static int smbfs_fhtovp(struct mount *mp, struct fid *fhp, 426 struct sockaddr *nam, struct vnode **vpp, 427 int *exflagsp, struct ucred **credanonp) 428 { 429 return (EINVAL); 430 } 431 432 /* 433 * Vnode pointer to File handle, should never happen either 434 */ 435 /* ARGSUSED */ 436 static int 437 smbfs_vptofh(struct vnode *vp, struct fid *fhp) 438 { 439 return (EINVAL); 440 } 441 442 #endif /* __FreeBSD_version < 400009 */ 443