smbfs_vfsops.c revision 87798
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: head/sys/fs/smbfs/smbfs_vfsops.c 87798 2001-12-13 13:08:34Z sheldonh $ 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 62int smbfs_debuglevel = 0; 63 64static int smbfs_version = SMBFS_VERSION; 65 66#ifdef SMBFS_USEZONE 67#include <vm/vm.h> 68#include <vm/vm_extern.h> 69#include <vm/vm_zone.h> 70 71vm_zone_t smbfsmount_zone; 72#endif 73 74SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); 75SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 76SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 77 78static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 79 80 81static int smbfs_mount(struct mount *, char *, caddr_t, 82 struct nameidata *, struct thread *); 83static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 84static int smbfs_root(struct mount *, struct vnode **); 85static int smbfs_start(struct mount *, int, struct thread *); 86static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 87static int smbfs_sync(struct mount *, int, struct ucred *, struct thread *); 88static int smbfs_unmount(struct mount *, int, struct thread *); 89static int smbfs_init(struct vfsconf *vfsp); 90static int smbfs_uninit(struct vfsconf *vfsp); 91 92#if __FreeBSD_version < 400009 93static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp); 94static int smbfs_fhtovp(struct mount *, struct fid *, 95 struct sockaddr *, struct vnode **, int *, 96 struct ucred **); 97static int smbfs_vptofh(struct vnode *, struct fid *); 98#endif 99 100static struct vfsops smbfs_vfsops = { 101 smbfs_mount, 102 smbfs_start, 103 smbfs_unmount, 104 smbfs_root, 105 smbfs_quotactl, 106 smbfs_statfs, 107 smbfs_sync, 108#if __FreeBSD_version > 400008 109 vfs_stdvget, 110 vfs_stdfhtovp, /* shouldn't happen */ 111 vfs_stdcheckexp, 112 vfs_stdvptofh, /* shouldn't happen */ 113#else 114 smbfs_vget, 115 smbfs_fhtovp, 116 smbfs_vptofh, 117#endif 118 smbfs_init, 119 smbfs_uninit, 120#ifndef FB_RELENG3 121 vfs_stdextattrctl, 122#else 123#define M_USE_RESERVE M_KERNEL 124 &sysctl___vfs_smbfs 125#endif 126}; 127 128 129VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 130 131MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 132MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 133MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 134 135int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 136 137static int 138smbfs_mount(struct mount *mp, char *path, caddr_t data, 139 struct nameidata *ndp, struct thread *td) 140{ 141 struct smbfs_args args; /* will hold data from mount request */ 142 struct smbmount *smp = NULL; 143 struct smb_vc *vcp; 144 struct smb_share *ssp = NULL; 145 struct vnode *vp; 146 struct smb_cred scred; 147#ifndef FB_CURRENT 148 size_t size; 149#endif 150 int error; 151 char *pc, *pe; 152 153 if (data == NULL) { 154 printf("missing data argument\n"); 155 return EINVAL; 156 } 157 if (mp->mnt_flag & MNT_UPDATE) { 158 printf("MNT_UPDATE not implemented"); 159 return EOPNOTSUPP; 160 } 161 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 162 if (error) 163 return error; 164 if (args.version != SMBFS_VERSION) { 165 printf("mount version mismatch: kernel=%d, mount=%d\n", 166 SMBFS_VERSION, args.version); 167 return EINVAL; 168 } 169 smb_makescred(&scred, td, td->td_proc->p_ucred); 170 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 171 if (error) { 172 printf("invalid device handle %d (%d)\n", args.dev, error); 173 return error; 174 } 175 vcp = SSTOVC(ssp); 176 smb_share_unlock(ssp, 0, td); 177 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 178 179#ifdef SMBFS_USEZONE 180 smp = zalloc(smbfsmount_zone); 181#else 182 MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE); 183#endif 184 if (smp == NULL) { 185 printf("could not alloc smbmount\n"); 186 error = ENOMEM; 187 goto bad; 188 } 189 bzero(smp, sizeof(*smp)); 190 mp->mnt_data = (qaddr_t)smp; 191 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 192 if (smp->sm_hash == NULL) 193 goto bad; 194 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 195 smp->sm_share = ssp; 196 smp->sm_root = NULL; 197 smp->sm_args = args; 198 smp->sm_caseopt = args.caseopt; 199 smp->sm_args.file_mode = (smp->sm_args.file_mode & 200 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 201 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 202 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 203 204/* simple_lock_init(&smp->sm_npslock);*/ 205#ifndef FB_CURRENT 206 error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 207 if (error) 208 goto bad; 209 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 210#endif 211 pc = mp->mnt_stat.f_mntfromname; 212 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 213 bzero(pc, MNAMELEN); 214 *pc++ = '/'; 215 *pc++ = '/'; 216 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 217 if (pc < pe-1) { 218 *(pc++) = '@'; 219 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 220 if (pc < pe - 1) { 221 *(pc++) = '/'; 222 strncpy(pc, ssp->ss_name, pe - pc - 2); 223 } 224 } 225 /* protect against invalid mount points */ 226 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 227 vfs_getnewfsid(mp); 228 error = smbfs_root(mp, &vp); 229 if (error) 230 goto bad; 231 VOP_UNLOCK(vp, 0, td); 232 SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount); 233 234#ifdef DIAGNOSTICS 235 SMBERROR("mp=%p\n", mp); 236#endif 237 return error; 238bad: 239 if (smp) { 240 if (smp->sm_hash) 241 free(smp->sm_hash, M_SMBFSHASH); 242 lockdestroy(&smp->sm_hashlock); 243#ifdef SMBFS_USEZONE 244 zfree(smbfsmount_zone, smp); 245#else 246 free(smp, M_SMBFSDATA); 247#endif 248 } 249 if (ssp) 250 smb_share_put(ssp, &scred); 251 return error; 252} 253 254/* Unmount the filesystem described by mp. */ 255static int 256smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 257{ 258 struct smbmount *smp = VFSTOSMBFS(mp); 259 struct smb_cred scred; 260 int error, flags; 261 262 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 263 flags = 0; 264 if (mntflags & MNT_FORCE) 265 flags |= FORCECLOSE; 266 /* There is 1 extra root vnode reference from smbfs_mount(). */ 267 error = vflush(mp, 1, flags); 268 if (error) 269 return error; 270 smb_makescred(&scred, td, td->td_proc->p_ucred); 271 smb_share_put(smp->sm_share, &scred); 272 mp->mnt_data = (qaddr_t)0; 273 274 if (smp->sm_hash) 275 free(smp->sm_hash, M_SMBFSHASH); 276 lockdestroy(&smp->sm_hashlock); 277#ifdef SMBFS_USEZONE 278 zfree(smbfsmount_zone, smp); 279#else 280 free(smp, M_SMBFSDATA); 281#endif 282 mp->mnt_flag &= ~MNT_LOCAL; 283 return error; 284} 285 286/* 287 * Return locked root vnode of a filesystem 288 */ 289static int 290smbfs_root(struct mount *mp, struct vnode **vpp) 291{ 292 struct smbmount *smp = VFSTOSMBFS(mp); 293 struct vnode *vp; 294 struct smbnode *np; 295 struct smbfattr fattr; 296 struct thread *td = curthread; 297 struct ucred *cred = td->td_proc->p_ucred; 298 struct smb_cred scred; 299 int error; 300 301 if (smp == NULL) { 302 SMBERROR("smp == NULL (bug in umount)\n"); 303 return EINVAL; 304 } 305 if (smp->sm_root) { 306 *vpp = SMBTOV(smp->sm_root); 307 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 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 vp->v_flag |= VROOT; 317 np = VTOSMB(vp); 318 smp->sm_root = np; 319 *vpp = vp; 320 return 0; 321} 322 323/* 324 * Vfs start routine, a no-op. 325 */ 326/* ARGSUSED */ 327static int 328smbfs_start(mp, flags, td) 329 struct mount *mp; 330 int flags; 331 struct thread *td; 332{ 333 SMBVDEBUG("flags=%04x\n", flags); 334 return 0; 335} 336 337/* 338 * Do operations associated with quotas, not supported 339 */ 340/* ARGSUSED */ 341static int 342smbfs_quotactl(mp, cmd, uid, arg, td) 343 struct mount *mp; 344 int cmd; 345 uid_t uid; 346 caddr_t arg; 347 struct thread *td; 348{ 349 SMBVDEBUG("return EOPNOTSUPP\n"); 350 return EOPNOTSUPP; 351} 352 353/*ARGSUSED*/ 354int 355smbfs_init(struct vfsconf *vfsp) 356{ 357#ifndef SMP 358 int name[2]; 359 int olen, ncpu, plen, error; 360 361 name[0] = CTL_HW; 362 name[1] = HW_NCPU; 363 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 364 if (error == 0 && ncpu > 1) 365 printf("warning: smbfs module compiled without SMP support."); 366#endif 367 368#ifdef SMBFS_USEZONE 369 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 370#endif 371 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 372 SMBVDEBUG("done.\n"); 373 return 0; 374} 375 376/*ARGSUSED*/ 377int 378smbfs_uninit(struct vfsconf *vfsp) 379{ 380 381 SMBVDEBUG("done.\n"); 382 return 0; 383} 384 385/* 386 * smbfs_statfs call 387 */ 388int 389smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 390{ 391 struct smbmount *smp = VFSTOSMBFS(mp); 392 struct smbnode *np = smp->sm_root; 393 struct smb_share *ssp = smp->sm_share; 394 struct smb_cred scred; 395 int error = 0; 396 397 if (np == NULL) 398 return EINVAL; 399 400 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 401 sbp->f_spare2 = 0; /* placeholder */ 402 smb_makescred(&scred, td, td->td_proc->p_ucred); 403 404 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 405 error = smbfs_smb_statfs2(ssp, sbp, &scred); 406 else 407 error = smbfs_smb_statfs(ssp, sbp, &scred); 408 if (error) 409 return error; 410 sbp->f_flags = 0; /* copy of mount exported flags */ 411 if (sbp != &mp->mnt_stat) { 412 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 413 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 414 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 415 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 416 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 417 } 418 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 419 return 0; 420} 421 422/* 423 * Flush out the buffer cache 424 */ 425/* ARGSUSED */ 426static int 427smbfs_sync(mp, waitfor, cred, td) 428 struct mount *mp; 429 int waitfor; 430 struct ucred *cred; 431 struct thread *td; 432{ 433 struct vnode *vp; 434 int error, allerror = 0; 435 /* 436 * Force stale buffer cache information to be flushed. 437 */ 438loop: 439 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 440 vp != NULL; 441 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 442 /* 443 * If the vnode that we are about to sync is no longer 444 * associated with this mount point, start over. 445 */ 446 if (vp->v_mount != mp) 447 goto loop; 448#ifndef FB_RELENG3 449 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 450#else 451 if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 452#endif 453 waitfor == MNT_LAZY) 454 continue; 455 if (vget(vp, LK_EXCLUSIVE, td)) 456 goto loop; 457 error = VOP_FSYNC(vp, cred, waitfor, td); 458 if (error) 459 allerror = error; 460 vput(vp); 461 } 462 return (allerror); 463} 464 465#if __FreeBSD_version < 400009 466/* 467 * smbfs flat namespace lookup. Unsupported. 468 */ 469/* ARGSUSED */ 470static int smbfs_vget(mp, ino, vpp) 471 struct mount *mp; 472 ino_t ino; 473 struct vnode **vpp; 474{ 475 return (EOPNOTSUPP); 476} 477 478/* ARGSUSED */ 479static int smbfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 480 struct mount *mp; 481 struct fid *fhp; 482 struct sockaddr *nam; 483 struct vnode **vpp; 484 int *exflagsp; 485 struct ucred **credanonp; 486{ 487 return (EINVAL); 488} 489 490/* 491 * Vnode pointer to File handle, should never happen either 492 */ 493/* ARGSUSED */ 494static int 495smbfs_vptofh(vp, fhp) 496 struct vnode *vp; 497 struct fid *fhp; 498{ 499 return (EINVAL); 500} 501 502#endif /* __FreeBSD_version < 400009 */ 503