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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/proc.h> 32 #include <sys/bio.h> 33 #include <sys/buf.h> 34 #include <sys/kernel.h> 35 #include <sys/sysctl.h> 36 #include <sys/vnode.h> 37 #include <sys/mount.h> 38 #include <sys/stat.h> 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/sx.h> 42 43 44 #include <netsmb/smb.h> 45 #include <netsmb/smb_conn.h> 46 #include <netsmb/smb_subr.h> 47 #include <netsmb/smb_dev.h> 48 49 #include <fs/smbfs/smbfs.h> 50 #include <fs/smbfs/smbfs_node.h> 51 #include <fs/smbfs/smbfs_subr.h> 52 53 static int smbfs_debuglevel = 0; 54 55 static int smbfs_version = SMBFS_VERSION; 56 57 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 58 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 59 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 60 61 static vfs_init_t smbfs_init; 62 static vfs_uninit_t smbfs_uninit; 63 static vfs_cmount_t smbfs_cmount; 64 static vfs_mount_t smbfs_mount; 65 static vfs_root_t smbfs_root; 66 static vfs_quotactl_t smbfs_quotactl; 67 static vfs_statfs_t smbfs_statfs; 68 static vfs_unmount_t smbfs_unmount; 69 70 static struct vfsops smbfs_vfsops = { 71 .vfs_init = smbfs_init, 72 .vfs_cmount = smbfs_cmount, 73 .vfs_mount = smbfs_mount, 74 .vfs_quotactl = smbfs_quotactl, 75 .vfs_root = smbfs_root, 76 .vfs_statfs = smbfs_statfs, 77 .vfs_sync = vfs_stdsync, 78 .vfs_uninit = smbfs_uninit, 79 .vfs_unmount = smbfs_unmount, 80 }; 81 82 83 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 84 85 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 86 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 87 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 88 89 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 90 91 static int 92 smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags) 93 { 94 struct smbfs_args args; 95 int error; 96 97 error = copyin(data, &args, sizeof(struct smbfs_args)); 98 if (error) 99 return error; 100 101 if (args.version != SMBFS_VERSION) { 102 printf("mount version mismatch: kernel=%d, mount=%d\n", 103 SMBFS_VERSION, args.version); 104 return EINVAL; 105 } 106 ma = mount_argf(ma, "dev", "%d", args.dev); 107 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 108 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 109 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 110 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 111 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 112 ma = mount_arg(ma, "rootpath", args.root_path, -1); 113 ma = mount_argf(ma, "uid", "%d", args.uid); 114 ma = mount_argf(ma, "gid", "%d", args.gid); 115 ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 116 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 117 ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 118 119 error = kernel_mount(ma, flags); 120 121 return (error); 122 } 123 124 static const char *smbfs_opts[] = { 125 "fd", "soft", "intr", "strong", "have_nls", "long", 126 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 127 "caseopt", "errmsg", NULL 128 }; 129 130 static int 131 smbfs_mount(struct mount *mp) 132 { 133 struct smbmount *smp = NULL; 134 struct smb_vc *vcp; 135 struct smb_share *ssp = NULL; 136 struct vnode *vp; 137 struct thread *td; 138 struct smb_dev *dev; 139 struct smb_cred *scred; 140 int error, v; 141 char *pc, *pe; 142 143 dev = NULL; 144 td = curthread; 145 if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) 146 return EOPNOTSUPP; 147 148 if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { 149 vfs_mount_error(mp, "%s", "Invalid option"); 150 return (EINVAL); 151 } 152 153 scred = smbfs_malloc_scred(); 154 smb_makescred(scred, td, td->td_ucred); 155 156 /* Ask userspace of `fd`, the file descriptor of this session */ 157 if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) { 158 vfs_mount_error(mp, "No fd option"); 159 smbfs_free_scred(scred); 160 return (EINVAL); 161 } 162 error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev); 163 smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO); 164 if (error) { 165 printf("invalid device handle %d (%d)\n", v, error); 166 vfs_mount_error(mp, "invalid device handle %d %d\n", v, error); 167 smbfs_free_scred(scred); 168 free(smp, M_SMBFSDATA); 169 return error; 170 } 171 vcp = SSTOVC(ssp); 172 smb_share_unlock(ssp); 173 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 174 mp->mnt_data = smp; 175 smp->sm_share = ssp; 176 smp->sm_root = NULL; 177 smp->sm_dev = dev; 178 if (1 != vfs_scanopt(mp->mnt_optnew, 179 "caseopt", "%d", &smp->sm_caseopt)) { 180 vfs_mount_error(mp, "Invalid caseopt"); 181 error = EINVAL; 182 goto bad; 183 } 184 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 185 vfs_mount_error(mp, "Invalid uid"); 186 error = EINVAL; 187 goto bad; 188 } 189 smp->sm_uid = v; 190 191 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 192 vfs_mount_error(mp, "Invalid gid"); 193 error = EINVAL; 194 goto bad; 195 } 196 smp->sm_gid = v; 197 198 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 199 vfs_mount_error(mp, "Invalid file_mode"); 200 error = EINVAL; 201 goto bad; 202 } 203 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 204 205 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 206 vfs_mount_error(mp, "Invalid dir_mode"); 207 error = EINVAL; 208 goto bad; 209 } 210 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 211 212 vfs_flagopt(mp->mnt_optnew, 213 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 214 215 pc = mp->mnt_stat.f_mntfromname; 216 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 217 bzero(pc, MNAMELEN); 218 *pc++ = '/'; 219 *pc++ = '/'; 220 pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 221 if (pc < pe-1) { 222 *(pc++) = '@'; 223 pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 224 if (pc < pe - 1) { 225 *(pc++) = '/'; 226 strncpy(pc, ssp->ss_name, pe - pc - 2); 227 } 228 } 229 vfs_getnewfsid(mp); 230 error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 231 if (error) { 232 vfs_mount_error(mp, "smbfs_root error: %d", error); 233 goto bad; 234 } 235 VOP_UNLOCK(vp, 0); 236 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 237 238 #ifdef DIAGNOSTIC 239 SMBERROR("mp=%p\n", mp); 240 #endif 241 smbfs_free_scred(scred); 242 return error; 243 bad: 244 if (ssp) 245 smb_share_put(ssp, scred); 246 smbfs_free_scred(scred); 247 SMB_LOCK(); 248 if (error && smp->sm_dev == dev) { 249 smp->sm_dev = NULL; 250 sdp_trydestroy(dev); 251 } 252 SMB_UNLOCK(); 253 free(smp, M_SMBFSDATA); 254 return error; 255 } 256 257 /* Unmount the filesystem described by mp. */ 258 static int 259 smbfs_unmount(struct mount *mp, int mntflags) 260 { 261 struct thread *td; 262 struct smbmount *smp = VFSTOSMBFS(mp); 263 struct smb_cred *scred; 264 struct smb_dev *dev; 265 int error, flags; 266 267 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 268 td = curthread; 269 flags = 0; 270 if (mntflags & MNT_FORCE) 271 flags |= FORCECLOSE; 272 /* 273 * Keep trying to flush the vnode list for the mount while 274 * some are still busy and we are making progress towards 275 * making them not busy. This is needed because smbfs vnodes 276 * reference their parent directory but may appear after their 277 * parent in the list; one pass over the vnode list is not 278 * sufficient in this case. 279 */ 280 do { 281 smp->sm_didrele = 0; 282 /* There is 1 extra root vnode reference from smbfs_mount(). */ 283 error = vflush(mp, 1, flags, td); 284 } while (error == EBUSY && smp->sm_didrele != 0); 285 if (error) 286 return error; 287 scred = smbfs_malloc_scred(); 288 smb_makescred(scred, td, td->td_ucred); 289 error = smb_share_lock(smp->sm_share); 290 if (error) 291 goto out; 292 smb_share_put(smp->sm_share, scred); 293 SMB_LOCK(); 294 dev = smp->sm_dev; 295 if (!dev) 296 panic("No private data for mount point"); 297 sdp_trydestroy(dev); 298 mp->mnt_data = NULL; 299 SMB_UNLOCK(); 300 free(smp, M_SMBFSDATA); 301 MNT_ILOCK(mp); 302 mp->mnt_flag &= ~MNT_LOCAL; 303 MNT_IUNLOCK(mp); 304 out: 305 smbfs_free_scred(scred); 306 return error; 307 } 308 309 /* 310 * Return locked root vnode of a filesystem 311 */ 312 static int 313 smbfs_root(struct mount *mp, int flags, struct vnode **vpp) 314 { 315 struct smbmount *smp = VFSTOSMBFS(mp); 316 struct vnode *vp; 317 struct smbnode *np; 318 struct smbfattr fattr; 319 struct thread *td; 320 struct ucred *cred; 321 struct smb_cred *scred; 322 int error; 323 324 td = curthread; 325 cred = td->td_ucred; 326 327 if (smp->sm_root) { 328 *vpp = SMBTOV(smp->sm_root); 329 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 330 } 331 scred = smbfs_malloc_scred(); 332 smb_makescred(scred, td, cred); 333 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, scred); 334 if (error) 335 goto out; 336 error = smbfs_nget(mp, NULL, NULL, 0, &fattr, &vp); 337 if (error) 338 goto out; 339 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 340 vp->v_vflag |= VV_ROOT; 341 np = VTOSMB(vp); 342 smp->sm_root = np; 343 *vpp = vp; 344 out: 345 smbfs_free_scred(scred); 346 return error; 347 } 348 349 /* 350 * Do operations associated with quotas, not supported 351 */ 352 /* ARGSUSED */ 353 static int 354 smbfs_quotactl(mp, cmd, uid, arg) 355 struct mount *mp; 356 int cmd; 357 uid_t uid; 358 void *arg; 359 { 360 SMBVDEBUG("return EOPNOTSUPP\n"); 361 return EOPNOTSUPP; 362 } 363 364 /*ARGSUSED*/ 365 int 366 smbfs_init(struct vfsconf *vfsp) 367 { 368 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 369 SMBVDEBUG("done.\n"); 370 return 0; 371 } 372 373 /*ARGSUSED*/ 374 int 375 smbfs_uninit(struct vfsconf *vfsp) 376 { 377 378 SMBVDEBUG("done.\n"); 379 return 0; 380 } 381 382 /* 383 * smbfs_statfs call 384 */ 385 int 386 smbfs_statfs(struct mount *mp, struct statfs *sbp) 387 { 388 struct thread *td = curthread; 389 struct smbmount *smp = VFSTOSMBFS(mp); 390 struct smbnode *np = smp->sm_root; 391 struct smb_share *ssp = smp->sm_share; 392 struct smb_cred *scred; 393 int error; 394 395 if (np == NULL) { 396 vfs_mount_error(mp, "np == NULL"); 397 return EINVAL; 398 } 399 400 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 401 scred = smbfs_malloc_scred(); 402 smb_makescred(scred, td, td->td_ucred); 403 error = smbfs_smb_statfs(ssp, sbp, scred); 404 smbfs_free_scred(scred); 405 return (error); 406 }
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