smbfs_vfsops.c revision 112915
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 112915 2003-04-01 02:42:02Z tjr $ 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 70vm_zone_t smbfsmount_zone; 71#endif 72 73SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 74SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 75SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 76 77static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 78 79 80static int smbfs_mount(struct mount *, char *, caddr_t, 81 struct nameidata *, struct thread *); 82static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 83static int smbfs_root(struct mount *, struct vnode **); 84static int smbfs_start(struct mount *, int, struct thread *); 85static int smbfs_statfs(struct mount *, struct statfs *, struct thread *); 86static int smbfs_unmount(struct mount *, int, struct thread *); 87static int smbfs_init(struct vfsconf *vfsp); 88static int smbfs_uninit(struct vfsconf *vfsp); 89 90static 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 108VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 109 110MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 111MODULE_DEPEND(smbfs, libiconv, 1, 1, 1); 112MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 113 114int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 115 116static int 117smbfs_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, 159 M_WAITOK|M_USE_RESERVE); 160#endif 161 if (smp == NULL) { 162 printf("could not alloc smbmount\n"); 163 error = ENOMEM; 164 goto bad; 165 } 166 bzero(smp, sizeof(*smp)); 167 mp->mnt_data = (qaddr_t)smp; 168 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 169 if (smp->sm_hash == NULL) 170 goto bad; 171 lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0); 172 smp->sm_share = ssp; 173 smp->sm_root = NULL; 174 smp->sm_args = args; 175 smp->sm_caseopt = args.caseopt; 176 smp->sm_args.file_mode = (smp->sm_args.file_mode & 177 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 178 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 179 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 180 181/* simple_lock_init(&smp->sm_npslock);*/ 182 pc = mp->mnt_stat.f_mntfromname; 183 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 184 bzero(pc, MNAMELEN); 185 *pc++ = '/'; 186 *pc++ = '/'; 187 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 188 if (pc < pe-1) { 189 *(pc++) = '@'; 190 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 191 if (pc < pe - 1) { 192 *(pc++) = '/'; 193 strncpy(pc, ssp->ss_name, pe - pc - 2); 194 } 195 } 196 /* protect against invalid mount points */ 197 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 198 vfs_getnewfsid(mp); 199 error = smbfs_root(mp, &vp); 200 if (error) 201 goto bad; 202 VOP_UNLOCK(vp, 0, td); 203 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 204 205#ifdef DIAGNOSTICS 206 SMBERROR("mp=%p\n", mp); 207#endif 208 return error; 209bad: 210 if (smp) { 211 if (smp->sm_hash) 212 free(smp->sm_hash, M_SMBFSHASH); 213 lockdestroy(&smp->sm_hashlock); 214#ifdef SMBFS_USEZONE 215 zfree(smbfsmount_zone, smp); 216#else 217 free(smp, M_SMBFSDATA); 218#endif 219 } 220 if (ssp) 221 smb_share_put(ssp, &scred); 222 return error; 223} 224 225/* Unmount the filesystem described by mp. */ 226static int 227smbfs_unmount(struct mount *mp, int mntflags, struct thread *td) 228{ 229 struct smbmount *smp = VFSTOSMBFS(mp); 230 struct smb_cred scred; 231 int error, flags; 232 233 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 234 flags = 0; 235 if (mntflags & MNT_FORCE) 236 flags |= FORCECLOSE; 237 /* 238 * Keep trying to flush the vnode list for the mount while 239 * some are still busy and we are making progress towards 240 * making them not busy. This is needed because smbfs vnodes 241 * reference their parent directory but may appear after their 242 * parent in the list; one pass over the vnode list is not 243 * sufficient in this case. 244 */ 245 do { 246 smp->sm_didrele = 0; 247 /* There is 1 extra root vnode reference from smbfs_mount(). */ 248 error = vflush(mp, 1, flags); 249 } while (error == EBUSY && smp->sm_didrele != 0); 250 if (error) 251 return error; 252 smb_makescred(&scred, td, td->td_ucred); 253 smb_share_put(smp->sm_share, &scred); 254 mp->mnt_data = (qaddr_t)0; 255 256 if (smp->sm_hash) 257 free(smp->sm_hash, M_SMBFSHASH); 258 lockdestroy(&smp->sm_hashlock); 259#ifdef SMBFS_USEZONE 260 zfree(smbfsmount_zone, smp); 261#else 262 free(smp, M_SMBFSDATA); 263#endif 264 mp->mnt_flag &= ~MNT_LOCAL; 265 return error; 266} 267 268/* 269 * Return locked root vnode of a filesystem 270 */ 271static int 272smbfs_root(struct mount *mp, struct vnode **vpp) 273{ 274 struct smbmount *smp = VFSTOSMBFS(mp); 275 struct vnode *vp; 276 struct smbnode *np; 277 struct smbfattr fattr; 278 struct thread *td = curthread; 279 struct ucred *cred = td->td_ucred; 280 struct smb_cred scred; 281 int error; 282 283 if (smp == NULL) { 284 SMBERROR("smp == NULL (bug in umount)\n"); 285 return EINVAL; 286 } 287 if (smp->sm_root) { 288 *vpp = SMBTOV(smp->sm_root); 289 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 290 } 291 smb_makescred(&scred, td, cred); 292 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 293 if (error) 294 return error; 295 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 296 if (error) 297 return error; 298 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 299 vp->v_vflag |= VV_ROOT; 300 np = VTOSMB(vp); 301 smp->sm_root = np; 302 *vpp = vp; 303 return 0; 304} 305 306/* 307 * Vfs start routine, a no-op. 308 */ 309/* ARGSUSED */ 310static int 311smbfs_start(mp, flags, td) 312 struct mount *mp; 313 int flags; 314 struct thread *td; 315{ 316 SMBVDEBUG("flags=%04x\n", flags); 317 return 0; 318} 319 320/* 321 * Do operations associated with quotas, not supported 322 */ 323/* ARGSUSED */ 324static int 325smbfs_quotactl(mp, cmd, uid, arg, td) 326 struct mount *mp; 327 int cmd; 328 uid_t uid; 329 caddr_t arg; 330 struct thread *td; 331{ 332 SMBVDEBUG("return EOPNOTSUPP\n"); 333 return EOPNOTSUPP; 334} 335 336/*ARGSUSED*/ 337int 338smbfs_init(struct vfsconf *vfsp) 339{ 340#ifndef SMP 341 int name[2]; 342 int olen, ncpu, plen, error; 343 344 name[0] = CTL_HW; 345 name[1] = HW_NCPU; 346 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 347 if (error == 0 && ncpu > 1) 348 printf("warning: smbfs module compiled without SMP support."); 349#endif 350 351#ifdef SMBFS_USEZONE 352 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 353#endif 354 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 355 SMBVDEBUG("done.\n"); 356 return 0; 357} 358 359/*ARGSUSED*/ 360int 361smbfs_uninit(struct vfsconf *vfsp) 362{ 363 364 SMBVDEBUG("done.\n"); 365 return 0; 366} 367 368/* 369 * smbfs_statfs call 370 */ 371int 372smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 373{ 374 struct smbmount *smp = VFSTOSMBFS(mp); 375 struct smbnode *np = smp->sm_root; 376 struct smb_share *ssp = smp->sm_share; 377 struct smb_cred scred; 378 int error = 0; 379 380 if (np == NULL) 381 return EINVAL; 382 383 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 384 sbp->f_spare2 = 0; /* placeholder */ 385 smb_makescred(&scred, td, td->td_ucred); 386 387 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 388 error = smbfs_smb_statfs2(ssp, sbp, &scred); 389 else 390 error = smbfs_smb_statfs(ssp, sbp, &scred); 391 if (error) 392 return error; 393 sbp->f_flags = 0; /* copy of mount exported flags */ 394 if (sbp != &mp->mnt_stat) { 395 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 396 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 397 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 398 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 399 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 400 } 401 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 402 return 0; 403} 404