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 static struct vfsops smbfs_vfsops = { 95 .vfs_mount = smbfs_mount, 96 .vfs_unmount = smbfs_unmount, 97 .vfs_root = smbfs_root, 98 .vfs_statfs = smbfs_statfs, 99 .vfs_sync = smbfs_sync, 100 .vfs_init = smbfs_init, 101 .vfs_uninit = smbfs_uninit 102 }; 103 104 105 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 106 MODULE_VERSION(smbfs, 1); 107 108 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 109 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 110 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 111 112 long smbfs_pbuf_freecnt = -1; /* start out unlimited */ 113 114 static int 115 smbfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 116 { 117 struct smbfs_args args; /* will hold data from mount request */ 118 struct smbmount *smp = NULL; 119 struct smb_vc *vcp; 120 struct smb_share *ssp = NULL; 121 struct vnode *vp; 122 struct smb_cred scred; 123 int error; 124 char *pc, *pe; 125 126 if (data == NULL) { 127 kprintf("missing data argument\n"); 128 return EINVAL; 129 } 130 if (mp->mnt_flag & MNT_UPDATE) { 131 kprintf("MNT_UPDATE not implemented"); 132 return EOPNOTSUPP; 133 } 134 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 135 if (error) 136 return error; 137 if (args.version != SMBFS_VERSION) { 138 kprintf("mount version mismatch: kernel=%d, mount=%d\n", 139 SMBFS_VERSION, args.version); 140 return EINVAL; 141 } 142 smb_makescred(&scred, curthread, cred); 143 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 144 if (error) { 145 kprintf("invalid device handle %d (%d)\n", args.dev, error); 146 return error; 147 } 148 vcp = SSTOVC(ssp); 149 smb_share_unlock(ssp, 0); 150 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 151 152 #ifdef SMBFS_USEZONE 153 smp = zalloc(smbfsmount_zone); 154 #else 155 smp = kmalloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_USE_RESERVE); 156 #endif 157 if (smp == NULL) { 158 kprintf("could not alloc smbmount\n"); 159 error = ENOMEM; 160 goto bad; 161 } 162 bzero(smp, sizeof(*smp)); 163 mp->mnt_data = (qaddr_t)smp; 164 smp->sm_cred = crhold(cred); 165 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 166 if (smp->sm_hash == NULL) 167 goto bad; 168 lockinit(&smp->sm_hashlock, "smbfsh", 0, 0); 169 smp->sm_share = ssp; 170 smp->sm_root = NULL; 171 smp->sm_args = args; 172 smp->sm_caseopt = args.caseopt; 173 smp->sm_args.file_mode = (smp->sm_args.file_mode & 174 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 175 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 176 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 177 178 /* simple_lock_init(&smp->sm_npslock);*/ 179 pc = mp->mnt_stat.f_mntfromname; 180 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 181 bzero(pc, MNAMELEN); 182 *pc++ = '/'; 183 *pc++ = '/'; 184 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 185 if (pc < pe-1) { 186 *(pc++) = '@'; 187 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 188 if (pc < pe - 1) { 189 *(pc++) = '/'; 190 strncpy(pc, ssp->ss_name, pe - pc - 2); 191 } 192 } 193 /* protect against invalid mount points */ 194 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 195 vfs_getnewfsid(mp); 196 197 vfs_add_vnodeops(mp, &smbfs_vnode_vops, &mp->mnt_vn_norm_ops); 198 199 error = smbfs_root(mp, &vp); 200 if (error) 201 goto bad; 202 vn_unlock(vp); 203 SMBVDEBUG("root.v_refcnt = %08x\n", vp->v_refcnt); 204 205 #ifdef DIAGNOSTICS 206 SMBERROR("mp=%p\n", mp); 207 #endif 208 return error; 209 bad: 210 if (smp) { 211 if (smp->sm_cred) 212 crfree(smp->sm_cred); 213 if (smp->sm_hash) 214 hashdestroy(smp->sm_hash, M_SMBFSHASH, 215 smp->sm_hashlen); 216 lockdestroy(&smp->sm_hashlock); 217 #ifdef SMBFS_USEZONE 218 zfree(smbfsmount_zone, smp); 219 #else 220 kfree(smp, M_SMBFSDATA); 221 #endif 222 } 223 if (ssp) 224 smb_share_put(ssp, &scred); 225 return error; 226 } 227 228 /* Unmount the filesystem described by mp. */ 229 static int 230 smbfs_unmount(struct mount *mp, int mntflags) 231 { 232 struct smbmount *smp = VFSTOSMBFS(mp); 233 struct smb_cred scred; 234 int error, flags; 235 236 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 237 flags = 0; 238 if (mntflags & MNT_FORCE) 239 flags |= FORCECLOSE; 240 /* 241 * Keep trying to flush the vnode list for the mount while 242 * some are still busy and we are making progress towards 243 * making them not busy. This is needed because smbfs vnodes 244 * reference their parent directory but may appear after their 245 * parent in the list; one pass over the vnode list is not 246 * sufficient in this case. 247 */ 248 do { 249 smp->sm_didrele = 0; 250 /* There is 1 extra root vnode reference from smbfs_mount(). */ 251 error = vflush(mp, 1, flags); 252 } while (error == EBUSY && smp->sm_didrele != 0); 253 if (error) 254 return error; 255 smb_makescred(&scred, curthread, smp->sm_cred); 256 smb_share_put(smp->sm_share, &scred); 257 mp->mnt_data = (qaddr_t)0; 258 259 if (smp->sm_cred) 260 crfree(smp->sm_cred); 261 if (smp->sm_hash) 262 hashdestroy(smp->sm_hash, M_SMBFSHASH, smp->sm_hashlen); 263 lockdestroy(&smp->sm_hashlock); 264 #ifdef SMBFS_USEZONE 265 zfree(smbfsmount_zone, smp); 266 #else 267 kfree(smp, M_SMBFSDATA); 268 #endif 269 mp->mnt_flag &= ~MNT_LOCAL; 270 return error; 271 } 272 273 /* 274 * Return locked root vnode of a filesystem 275 */ 276 static int 277 smbfs_root(struct mount *mp, struct vnode **vpp) 278 { 279 struct thread *td = curthread; /* XXX */ 280 struct smbmount *smp = VFSTOSMBFS(mp); 281 struct vnode *vp; 282 struct smbnode *np; 283 struct smbfattr fattr; 284 struct ucred *cred; 285 struct smb_cred scred; 286 int error; 287 288 if (smp == NULL) { 289 SMBERROR("smp == NULL (bug in umount)\n"); 290 return EINVAL; 291 } 292 if (smp->sm_root) { 293 *vpp = SMBTOV(smp->sm_root); 294 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY); 295 } 296 if (td->td_proc) 297 cred = td->td_proc->p_ucred; 298 else 299 cred = proc0.p_ucred; 300 301 smb_makescred(&scred, td, cred); 302 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 303 if (error) 304 return error; 305 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 306 if (error) 307 return error; 308 vsetflags(vp, VROOT); 309 np = VTOSMB(vp); 310 smp->sm_root = np; 311 *vpp = vp; 312 return 0; 313 } 314 315 /*ARGSUSED*/ 316 int 317 smbfs_init(struct vfsconf *vfsp) 318 { 319 #ifdef SMBFS_USEZONE 320 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 321 #endif 322 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 323 SMBVDEBUG("done.\n"); 324 return 0; 325 } 326 327 /*ARGSUSED*/ 328 int 329 smbfs_uninit(struct vfsconf *vfsp) 330 { 331 SMBVDEBUG("done.\n"); 332 return 0; 333 } 334 335 /* 336 * smbfs_statfs call 337 */ 338 int 339 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 340 { 341 struct smbmount *smp = VFSTOSMBFS(mp); 342 struct smbnode *np = smp->sm_root; 343 struct smb_share *ssp = smp->sm_share; 344 struct smb_cred scred; 345 int error = 0; 346 347 if (np == NULL) 348 return EINVAL; 349 350 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 351 sbp->f_spare2 = 0; /* placeholder */ 352 smb_makescred(&scred, curthread, cred); 353 354 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 355 error = smbfs_smb_statfs2(ssp, sbp, &scred); 356 else 357 error = smbfs_smb_statfs(ssp, sbp, &scred); 358 if (error) 359 return error; 360 sbp->f_flags = 0; /* copy of mount exported flags */ 361 if (sbp != &mp->mnt_stat) { 362 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 363 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 364 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 365 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 366 } 367 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 368 return 0; 369 } 370 371 /* 372 * Flush out the buffer cache 373 */ 374 /* ARGSUSED */ 375 static int 376 smbfs_sync(struct mount *mp, int waitfor) 377 { 378 struct vnode *vp; 379 int error, allerror = 0; 380 /* 381 * Force stale buffer cache information to be flushed. 382 */ 383 loop: 384 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 385 vp != NULL; 386 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 387 /* 388 * If the vnode that we are about to sync is no longer 389 * associated with this mount point, start over. 390 */ 391 if (vp->v_mount != mp) 392 goto loop; 393 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) || 394 (waitfor & MNT_LAZY)) 395 continue; 396 if (vget(vp, LK_EXCLUSIVE)) 397 goto loop; 398 error = VOP_FSYNC(vp, waitfor, 0); 399 if (error) 400 allerror = error; 401 vput(vp); 402 } 403 return (allerror); 404 } 405