Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/smbfs/smbfs_vfsops.c
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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: releng/8.4/sys/fs/smbfs/smbfs_vfsops.c 191990 2009-05-11 15:33:26Z attilio $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/bio.h> 39 #include <sys/buf.h> 40 #include <sys/kernel.h> 41 #include <sys/sysctl.h> 42 #include <sys/vnode.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/malloc.h> 46 #include <sys/module.h> 47 #include <sys/sx.h> 48 49 50 #include <netsmb/smb.h> 51 #include <netsmb/smb_conn.h> 52 #include <netsmb/smb_subr.h> 53 #include <netsmb/smb_dev.h> 54 55 #include <fs/smbfs/smbfs.h> 56 #include <fs/smbfs/smbfs_node.h> 57 #include <fs/smbfs/smbfs_subr.h> 58 59 static int smbfs_debuglevel = 0; 60 61 static int smbfs_version = SMBFS_VERSION; 62 63 #ifdef SMBFS_USEZONE 64 #include <vm/vm.h> 65 #include <vm/vm_extern.h> 66 67 vm_zone_t smbfsmount_zone; 68 #endif 69 70 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 71 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 72 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 73 74 static MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table"); 75 76 static vfs_init_t smbfs_init; 77 static vfs_uninit_t smbfs_uninit; 78 static vfs_cmount_t smbfs_cmount; 79 static vfs_mount_t smbfs_mount; 80 static vfs_root_t smbfs_root; 81 static vfs_quotactl_t smbfs_quotactl; 82 static vfs_statfs_t smbfs_statfs; 83 static vfs_unmount_t smbfs_unmount; 84 85 static struct vfsops smbfs_vfsops = { 86 .vfs_init = smbfs_init, 87 .vfs_cmount = smbfs_cmount, 88 .vfs_mount = smbfs_mount, 89 .vfs_quotactl = smbfs_quotactl, 90 .vfs_root = smbfs_root, 91 .vfs_statfs = smbfs_statfs, 92 .vfs_sync = vfs_stdsync, 93 .vfs_uninit = smbfs_uninit, 94 .vfs_unmount = smbfs_unmount, 95 }; 96 97 98 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 99 100 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 101 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 102 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 103 104 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 105 106 static int 107 smbfs_cmount(struct mntarg *ma, void * data, int flags) 108 { 109 struct smbfs_args args; 110 int error; 111 112 error = copyin(data, &args, sizeof(struct smbfs_args)); 113 if (error) 114 return error; 115 116 if (args.version != SMBFS_VERSION) { 117 printf("mount version mismatch: kernel=%d, mount=%d\n", 118 SMBFS_VERSION, args.version); 119 return EINVAL; 120 } 121 ma = mount_argf(ma, "dev", "%d", args.dev); 122 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 123 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 124 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 125 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 126 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 127 ma = mount_arg(ma, "rootpath", args.root_path, -1); 128 ma = mount_argf(ma, "uid", "%d", args.uid); 129 ma = mount_argf(ma, "gid", "%d", args.gid); 130 ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 131 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 132 ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 133 134 error = kernel_mount(ma, flags); 135 136 return (error); 137 } 138 139 static const char *smbfs_opts[] = { 140 "dev", "soft", "intr", "strong", "have_nls", "long", 141 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 142 "caseopt", "errmsg", NULL 143 }; 144 145 static int 146 smbfs_mount(struct mount *mp) 147 { 148 struct smbmount *smp = NULL; 149 struct smb_vc *vcp; 150 struct smb_share *ssp = NULL; 151 struct vnode *vp; 152 struct thread *td; 153 struct smb_cred scred; 154 int error, v; 155 char *pc, *pe; 156 157 td = curthread; 158 if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) 159 return EOPNOTSUPP; 160 161 if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { 162 vfs_mount_error(mp, "%s", "Invalid option"); 163 return (EINVAL); 164 } 165 166 smb_makescred(&scred, td, td->td_ucred); 167 if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) { 168 vfs_mount_error(mp, "No dev option"); 169 return (EINVAL); 170 } 171 error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp); 172 if (error) { 173 printf("invalid device handle %d (%d)\n", v, error); 174 vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error); 175 return error; 176 } 177 vcp = SSTOVC(ssp); 178 smb_share_unlock(ssp, 0); 179 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 180 181 #ifdef SMBFS_USEZONE 182 smp = zalloc(smbfsmount_zone); 183 #else 184 smp = malloc(sizeof(*smp), M_SMBFSDATA, 185 M_WAITOK|M_USE_RESERVE); 186 #endif 187 if (smp == NULL) { 188 printf("could not alloc smbmount\n"); 189 vfs_mount_error(mp, "could not alloc smbmount", v, error); 190 error = ENOMEM; 191 goto bad; 192 } 193 bzero(smp, sizeof(*smp)); 194 mp->mnt_data = smp; 195 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 196 if (smp->sm_hash == NULL) 197 goto bad; 198 sx_init(&smp->sm_hashlock, "smbfsh"); 199 smp->sm_share = ssp; 200 smp->sm_root = NULL; 201 if (1 != vfs_scanopt(mp->mnt_optnew, 202 "caseopt", "%d", &smp->sm_caseopt)) { 203 vfs_mount_error(mp, "Invalid caseopt"); 204 error = EINVAL; 205 goto bad; 206 } 207 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 208 vfs_mount_error(mp, "Invalid uid"); 209 error = EINVAL; 210 goto bad; 211 } 212 smp->sm_uid = v; 213 214 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 215 vfs_mount_error(mp, "Invalid gid"); 216 error = EINVAL; 217 goto bad; 218 } 219 smp->sm_gid = v; 220 221 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 222 vfs_mount_error(mp, "Invalid file_mode"); 223 error = EINVAL; 224 goto bad; 225 } 226 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 227 228 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 229 vfs_mount_error(mp, "Invalid dir_mode"); 230 error = EINVAL; 231 goto bad; 232 } 233 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 234 235 vfs_flagopt(mp->mnt_optnew, 236 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 237 238 /* simple_lock_init(&smp->sm_npslock);*/ 239 pc = mp->mnt_stat.f_mntfromname; 240 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 241 bzero(pc, MNAMELEN); 242 *pc++ = '/'; 243 *pc++ = '/'; 244 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 245 if (pc < pe-1) { 246 *(pc++) = '@'; 247 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 248 if (pc < pe - 1) { 249 *(pc++) = '/'; 250 strncpy(pc, ssp->ss_name, pe - pc - 2); 251 } 252 } 253 vfs_getnewfsid(mp); 254 error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 255 if (error) { 256 vfs_mount_error(mp, "smbfs_root error: %d", error); 257 goto bad; 258 } 259 VOP_UNLOCK(vp, 0); 260 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 261 262 #ifdef DIAGNOSTICS 263 SMBERROR("mp=%p\n", mp); 264 #endif 265 return error; 266 bad: 267 if (smp) { 268 if (smp->sm_hash) 269 free(smp->sm_hash, M_SMBFSHASH); 270 sx_destroy(&smp->sm_hashlock); 271 #ifdef SMBFS_USEZONE 272 zfree(smbfsmount_zone, smp); 273 #else 274 free(smp, M_SMBFSDATA); 275 #endif 276 } 277 if (ssp) 278 smb_share_put(ssp, &scred); 279 return error; 280 } 281 282 /* Unmount the filesystem described by mp. */ 283 static int 284 smbfs_unmount(struct mount *mp, int mntflags) 285 { 286 struct thread *td; 287 struct smbmount *smp = VFSTOSMBFS(mp); 288 struct smb_cred scred; 289 int error, flags; 290 291 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 292 td = curthread; 293 flags = 0; 294 if (mntflags & MNT_FORCE) 295 flags |= FORCECLOSE; 296 /* 297 * Keep trying to flush the vnode list for the mount while 298 * some are still busy and we are making progress towards 299 * making them not busy. This is needed because smbfs vnodes 300 * reference their parent directory but may appear after their 301 * parent in the list; one pass over the vnode list is not 302 * sufficient in this case. 303 */ 304 do { 305 smp->sm_didrele = 0; 306 /* There is 1 extra root vnode reference from smbfs_mount(). */ 307 error = vflush(mp, 1, flags, td); 308 } while (error == EBUSY && smp->sm_didrele != 0); 309 if (error) 310 return error; 311 smb_makescred(&scred, td, td->td_ucred); 312 error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); 313 if (error) 314 return error; 315 smb_share_put(smp->sm_share, &scred); 316 mp->mnt_data = NULL; 317 318 if (smp->sm_hash) 319 free(smp->sm_hash, M_SMBFSHASH); 320 sx_destroy(&smp->sm_hashlock); 321 #ifdef SMBFS_USEZONE 322 zfree(smbfsmount_zone, smp); 323 #else 324 free(smp, M_SMBFSDATA); 325 #endif 326 MNT_ILOCK(mp); 327 mp->mnt_flag &= ~MNT_LOCAL; 328 MNT_IUNLOCK(mp); 329 return error; 330 } 331 332 /* 333 * Return locked root vnode of a filesystem 334 */ 335 static int 336 smbfs_root(struct mount *mp, int flags, struct vnode **vpp) 337 { 338 struct smbmount *smp = VFSTOSMBFS(mp); 339 struct vnode *vp; 340 struct smbnode *np; 341 struct smbfattr fattr; 342 struct thread *td; 343 struct ucred *cred; 344 struct smb_cred scred; 345 int error; 346 347 td = curthread; 348 cred = td->td_ucred; 349 350 if (smp == NULL) { 351 SMBERROR("smp == NULL (bug in umount)\n"); 352 vfs_mount_error(mp, "smp == NULL (bug in umount)"); 353 return EINVAL; 354 } 355 if (smp->sm_root) { 356 *vpp = SMBTOV(smp->sm_root); 357 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 358 } 359 smb_makescred(&scred, td, cred); 360 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 361 if (error) 362 return error; 363 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 364 if (error) 365 return error; 366 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 367 vp->v_vflag |= VV_ROOT; 368 np = VTOSMB(vp); 369 smp->sm_root = np; 370 *vpp = vp; 371 return 0; 372 } 373 374 /* 375 * Do operations associated with quotas, not supported 376 */ 377 /* ARGSUSED */ 378 static int 379 smbfs_quotactl(mp, cmd, uid, arg) 380 struct mount *mp; 381 int cmd; 382 uid_t uid; 383 void *arg; 384 { 385 SMBVDEBUG("return EOPNOTSUPP\n"); 386 return EOPNOTSUPP; 387 } 388 389 /*ARGSUSED*/ 390 int 391 smbfs_init(struct vfsconf *vfsp) 392 { 393 #ifdef SMBFS_USEZONE 394 smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 395 #endif 396 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 397 SMBVDEBUG("done.\n"); 398 return 0; 399 } 400 401 /*ARGSUSED*/ 402 int 403 smbfs_uninit(struct vfsconf *vfsp) 404 { 405 406 SMBVDEBUG("done.\n"); 407 return 0; 408 } 409 410 /* 411 * smbfs_statfs call 412 */ 413 int 414 smbfs_statfs(struct mount *mp, struct statfs *sbp) 415 { 416 struct thread *td = curthread; 417 struct smbmount *smp = VFSTOSMBFS(mp); 418 struct smbnode *np = smp->sm_root; 419 struct smb_share *ssp = smp->sm_share; 420 struct smb_cred scred; 421 int error = 0; 422 423 if (np == NULL) { 424 vfs_mount_error(mp, "np == NULL"); 425 return EINVAL; 426 } 427 428 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 429 smb_makescred(&scred, td, td->td_ucred); 430 431 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 432 error = smbfs_smb_statfs2(ssp, sbp, &scred); 433 else 434 error = smbfs_smb_statfs(ssp, sbp, &scred); 435 if (error) 436 return error; 437 sbp->f_flags = 0; /* copy of mount exported flags */ 438 return 0; 439 }
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