smbfs_vfsops.c revision 242386
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: head/sys/fs/smbfs/smbfs_vfsops.c 242386 2012-10-31 03:34:07Z davide $ 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 53static int smbfs_debuglevel = 0; 54 55static int smbfs_version = SMBFS_VERSION; 56 57SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 58SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 59SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 60 61static MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table"); 62 63static vfs_init_t smbfs_init; 64static vfs_uninit_t smbfs_uninit; 65static vfs_cmount_t smbfs_cmount; 66static vfs_mount_t smbfs_mount; 67static vfs_root_t smbfs_root; 68static vfs_quotactl_t smbfs_quotactl; 69static vfs_statfs_t smbfs_statfs; 70static vfs_unmount_t smbfs_unmount; 71 72static struct vfsops smbfs_vfsops = { 73 .vfs_init = smbfs_init, 74 .vfs_cmount = smbfs_cmount, 75 .vfs_mount = smbfs_mount, 76 .vfs_quotactl = smbfs_quotactl, 77 .vfs_root = smbfs_root, 78 .vfs_statfs = smbfs_statfs, 79 .vfs_sync = vfs_stdsync, 80 .vfs_uninit = smbfs_uninit, 81 .vfs_unmount = smbfs_unmount, 82}; 83 84 85VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 86 87MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 88MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 89MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 90 91int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 92 93static int 94smbfs_cmount(struct mntarg *ma, void * data, uint64_t flags) 95{ 96 struct smbfs_args args; 97 int error; 98 99 error = copyin(data, &args, sizeof(struct smbfs_args)); 100 if (error) 101 return error; 102 103 if (args.version != SMBFS_VERSION) { 104 printf("mount version mismatch: kernel=%d, mount=%d\n", 105 SMBFS_VERSION, args.version); 106 return EINVAL; 107 } 108 ma = mount_argf(ma, "dev", "%d", args.dev); 109 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 110 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 111 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 112 ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 113 ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 114 ma = mount_arg(ma, "rootpath", args.root_path, -1); 115 ma = mount_argf(ma, "uid", "%d", args.uid); 116 ma = mount_argf(ma, "gid", "%d", args.gid); 117 ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 118 ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 119 ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 120 121 error = kernel_mount(ma, flags); 122 123 return (error); 124} 125 126static const char *smbfs_opts[] = { 127 "dev", "soft", "intr", "strong", "have_nls", "long", 128 "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 129 "caseopt", "errmsg", NULL 130}; 131 132static int 133smbfs_mount(struct mount *mp) 134{ 135 struct smbmount *smp = NULL; 136 struct smb_vc *vcp; 137 struct smb_share *ssp = NULL; 138 struct vnode *vp; 139 struct thread *td; 140 struct smb_cred *scred; 141 int error, v; 142 char *pc, *pe; 143 144 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 if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) { 156 vfs_mount_error(mp, "No dev option"); 157 smbfs_free_scred(scred); 158 return (EINVAL); 159 } 160 error = smb_dev2share(v, SMBM_EXEC, scred, &ssp); 161 if (error) { 162 printf("invalid device handle %d (%d)\n", v, error); 163 vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error); 164 smbfs_free_scred(scred); 165 return error; 166 } 167 vcp = SSTOVC(ssp); 168 smb_share_unlock(ssp, 0); 169 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 170 171 smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO); 172 mp->mnt_data = smp; 173 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 174 if (smp->sm_hash == NULL) 175 goto bad; 176 sx_init(&smp->sm_hashlock, "smbfsh"); 177 smp->sm_share = ssp; 178 smp->sm_root = NULL; 179 if (1 != vfs_scanopt(mp->mnt_optnew, 180 "caseopt", "%d", &smp->sm_caseopt)) { 181 vfs_mount_error(mp, "Invalid caseopt"); 182 error = EINVAL; 183 goto bad; 184 } 185 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 186 vfs_mount_error(mp, "Invalid uid"); 187 error = EINVAL; 188 goto bad; 189 } 190 smp->sm_uid = v; 191 192 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 193 vfs_mount_error(mp, "Invalid gid"); 194 error = EINVAL; 195 goto bad; 196 } 197 smp->sm_gid = v; 198 199 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 200 vfs_mount_error(mp, "Invalid file_mode"); 201 error = EINVAL; 202 goto bad; 203 } 204 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 205 206 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 207 vfs_mount_error(mp, "Invalid dir_mode"); 208 error = EINVAL; 209 goto bad; 210 } 211 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 212 213 vfs_flagopt(mp->mnt_optnew, 214 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 215 216/* simple_lock_init(&smp->sm_npslock);*/ 217 pc = mp->mnt_stat.f_mntfromname; 218 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 219 bzero(pc, MNAMELEN); 220 *pc++ = '/'; 221 *pc++ = '/'; 222 pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 223 if (pc < pe-1) { 224 *(pc++) = '@'; 225 pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 226 if (pc < pe - 1) { 227 *(pc++) = '/'; 228 strncpy(pc, ssp->ss_name, pe - pc - 2); 229 } 230 } 231 vfs_getnewfsid(mp); 232 error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 233 if (error) { 234 vfs_mount_error(mp, "smbfs_root error: %d", error); 235 goto bad; 236 } 237 VOP_UNLOCK(vp, 0); 238 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 239 240#ifdef DIAGNOSTIC 241 SMBERROR("mp=%p\n", mp); 242#endif 243 smbfs_free_scred(scred); 244 return error; 245bad: 246 if (smp) { 247 if (smp->sm_hash) 248 free(smp->sm_hash, M_SMBFSHASH); 249 sx_destroy(&smp->sm_hashlock); 250 free(smp, M_SMBFSDATA); 251 } 252 if (ssp) 253 smb_share_put(ssp, scred); 254 smbfs_free_scred(scred); 255 return error; 256} 257 258/* Unmount the filesystem described by mp. */ 259static int 260smbfs_unmount(struct mount *mp, int mntflags) 261{ 262 struct thread *td; 263 struct smbmount *smp = VFSTOSMBFS(mp); 264 struct smb_cred *scred; 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, LK_EXCLUSIVE); 290 if (error) 291 goto out; 292 smb_share_put(smp->sm_share, scred); 293 mp->mnt_data = NULL; 294 295 if (smp->sm_hash) 296 free(smp->sm_hash, M_SMBFSHASH); 297 sx_destroy(&smp->sm_hashlock); 298 free(smp, M_SMBFSDATA); 299 MNT_ILOCK(mp); 300 mp->mnt_flag &= ~MNT_LOCAL; 301 MNT_IUNLOCK(mp); 302out: 303 smbfs_free_scred(scred); 304 return error; 305} 306 307/* 308 * Return locked root vnode of a filesystem 309 */ 310static int 311smbfs_root(struct mount *mp, int flags, struct vnode **vpp) 312{ 313 struct smbmount *smp = VFSTOSMBFS(mp); 314 struct vnode *vp; 315 struct smbnode *np; 316 struct smbfattr fattr; 317 struct thread *td; 318 struct ucred *cred; 319 struct smb_cred *scred; 320 int error; 321 322 td = curthread; 323 cred = td->td_ucred; 324 325 if (smp == NULL) { 326 SMBERROR("smp == NULL (bug in umount)\n"); 327 vfs_mount_error(mp, "smp == NULL (bug in umount)"); 328 return EINVAL; 329 } 330 if (smp->sm_root) { 331 *vpp = SMBTOV(smp->sm_root); 332 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 333 } 334 scred = smbfs_malloc_scred(); 335 smb_makescred(scred, td, cred); 336 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, scred); 337 if (error) 338 goto out; 339 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 340 if (error) 341 goto out; 342 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 343 vp->v_vflag |= VV_ROOT; 344 np = VTOSMB(vp); 345 smp->sm_root = np; 346 *vpp = vp; 347out: 348 smbfs_free_scred(scred); 349 return error; 350} 351 352/* 353 * Do operations associated with quotas, not supported 354 */ 355/* ARGSUSED */ 356static int 357smbfs_quotactl(mp, cmd, uid, arg) 358 struct mount *mp; 359 int cmd; 360 uid_t uid; 361 void *arg; 362{ 363 SMBVDEBUG("return EOPNOTSUPP\n"); 364 return EOPNOTSUPP; 365} 366 367/*ARGSUSED*/ 368int 369smbfs_init(struct vfsconf *vfsp) 370{ 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) 390{ 391 struct thread *td = curthread; 392 struct smbmount *smp = VFSTOSMBFS(mp); 393 struct smbnode *np = smp->sm_root; 394 struct smb_share *ssp = smp->sm_share; 395 struct smb_cred *scred; 396 int error = 0; 397 398 if (np == NULL) { 399 vfs_mount_error(mp, "np == NULL"); 400 return EINVAL; 401 } 402 403 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 404 scred = smbfs_malloc_scred(); 405 smb_makescred(scred, td, td->td_ucred); 406 407 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 408 error = smbfs_smb_statfs2(ssp, sbp, scred); 409 else 410 error = smbfs_smb_statfs(ssp, sbp, scred); 411 if (error) { 412 smbfs_free_scred(scred); 413 return error; 414 } 415 sbp->f_flags = 0; /* copy of mount exported flags */ 416 smbfs_free_scred(scred); 417 return 0; 418} 419