smbfs_vfsops.c revision 242092
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 242092 2012-10-25 20:23:04Z 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 smb_makescred(&scred, td, td->td_ucred); 154 if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) { 155 vfs_mount_error(mp, "No dev option"); 156 return (EINVAL); 157 } 158 error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp); 159 if (error) { 160 printf("invalid device handle %d (%d)\n", v, error); 161 vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error); 162 return error; 163 } 164 vcp = SSTOVC(ssp); 165 smb_share_unlock(ssp, 0); 166 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 167 168 smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO); 169 mp->mnt_data = smp; 170 smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 171 if (smp->sm_hash == NULL) 172 goto bad; 173 sx_init(&smp->sm_hashlock, "smbfsh"); 174 smp->sm_share = ssp; 175 smp->sm_root = NULL; 176 if (1 != vfs_scanopt(mp->mnt_optnew, 177 "caseopt", "%d", &smp->sm_caseopt)) { 178 vfs_mount_error(mp, "Invalid caseopt"); 179 error = EINVAL; 180 goto bad; 181 } 182 if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 183 vfs_mount_error(mp, "Invalid uid"); 184 error = EINVAL; 185 goto bad; 186 } 187 smp->sm_uid = v; 188 189 if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 190 vfs_mount_error(mp, "Invalid gid"); 191 error = EINVAL; 192 goto bad; 193 } 194 smp->sm_gid = v; 195 196 if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 197 vfs_mount_error(mp, "Invalid file_mode"); 198 error = EINVAL; 199 goto bad; 200 } 201 smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 202 203 if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 204 vfs_mount_error(mp, "Invalid dir_mode"); 205 error = EINVAL; 206 goto bad; 207 } 208 smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 209 210 vfs_flagopt(mp->mnt_optnew, 211 "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 212 213/* simple_lock_init(&smp->sm_npslock);*/ 214 pc = mp->mnt_stat.f_mntfromname; 215 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 216 bzero(pc, MNAMELEN); 217 *pc++ = '/'; 218 *pc++ = '/'; 219 pc = strchr(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 220 if (pc < pe-1) { 221 *(pc++) = '@'; 222 pc = strchr(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 223 if (pc < pe - 1) { 224 *(pc++) = '/'; 225 strncpy(pc, ssp->ss_name, pe - pc - 2); 226 } 227 } 228 vfs_getnewfsid(mp); 229 error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 230 if (error) { 231 vfs_mount_error(mp, "smbfs_root error: %d", error); 232 goto bad; 233 } 234 VOP_UNLOCK(vp, 0); 235 SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 236 237#ifdef DIAGNOSTIC 238 SMBERROR("mp=%p\n", mp); 239#endif 240 return error; 241bad: 242 if (smp) { 243 if (smp->sm_hash) 244 free(smp->sm_hash, M_SMBFSHASH); 245 sx_destroy(&smp->sm_hashlock); 246 free(smp, M_SMBFSDATA); 247 } 248 if (ssp) 249 smb_share_put(ssp, &scred); 250 return error; 251} 252 253/* Unmount the filesystem described by mp. */ 254static int 255smbfs_unmount(struct mount *mp, int mntflags) 256{ 257 struct thread *td; 258 struct smbmount *smp = VFSTOSMBFS(mp); 259 struct smb_cred scred; 260 int error, flags; 261 262 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 263 td = curthread; 264 flags = 0; 265 if (mntflags & MNT_FORCE) 266 flags |= FORCECLOSE; 267 /* 268 * Keep trying to flush the vnode list for the mount while 269 * some are still busy and we are making progress towards 270 * making them not busy. This is needed because smbfs vnodes 271 * reference their parent directory but may appear after their 272 * parent in the list; one pass over the vnode list is not 273 * sufficient in this case. 274 */ 275 do { 276 smp->sm_didrele = 0; 277 /* There is 1 extra root vnode reference from smbfs_mount(). */ 278 error = vflush(mp, 1, flags, td); 279 } while (error == EBUSY && smp->sm_didrele != 0); 280 if (error) 281 return error; 282 smb_makescred(&scred, td, td->td_ucred); 283 error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); 284 if (error) 285 return error; 286 smb_share_put(smp->sm_share, &scred); 287 mp->mnt_data = NULL; 288 289 if (smp->sm_hash) 290 free(smp->sm_hash, M_SMBFSHASH); 291 sx_destroy(&smp->sm_hashlock); 292 free(smp, M_SMBFSDATA); 293 MNT_ILOCK(mp); 294 mp->mnt_flag &= ~MNT_LOCAL; 295 MNT_IUNLOCK(mp); 296 return error; 297} 298 299/* 300 * Return locked root vnode of a filesystem 301 */ 302static int 303smbfs_root(struct mount *mp, int flags, struct vnode **vpp) 304{ 305 struct smbmount *smp = VFSTOSMBFS(mp); 306 struct vnode *vp; 307 struct smbnode *np; 308 struct smbfattr fattr; 309 struct thread *td; 310 struct ucred *cred; 311 struct smb_cred scred; 312 int error; 313 314 td = curthread; 315 cred = td->td_ucred; 316 317 if (smp == NULL) { 318 SMBERROR("smp == NULL (bug in umount)\n"); 319 vfs_mount_error(mp, "smp == NULL (bug in umount)"); 320 return EINVAL; 321 } 322 if (smp->sm_root) { 323 *vpp = SMBTOV(smp->sm_root); 324 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 325 } 326 smb_makescred(&scred, td, cred); 327 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 328 if (error) 329 return error; 330 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 331 if (error) 332 return error; 333 ASSERT_VOP_LOCKED(vp, "smbfs_root"); 334 vp->v_vflag |= VV_ROOT; 335 np = VTOSMB(vp); 336 smp->sm_root = np; 337 *vpp = vp; 338 return 0; 339} 340 341/* 342 * Do operations associated with quotas, not supported 343 */ 344/* ARGSUSED */ 345static int 346smbfs_quotactl(mp, cmd, uid, arg) 347 struct mount *mp; 348 int cmd; 349 uid_t uid; 350 void *arg; 351{ 352 SMBVDEBUG("return EOPNOTSUPP\n"); 353 return EOPNOTSUPP; 354} 355 356/*ARGSUSED*/ 357int 358smbfs_init(struct vfsconf *vfsp) 359{ 360 smbfs_pbuf_freecnt = nswbuf / 2 + 1; 361 SMBVDEBUG("done.\n"); 362 return 0; 363} 364 365/*ARGSUSED*/ 366int 367smbfs_uninit(struct vfsconf *vfsp) 368{ 369 370 SMBVDEBUG("done.\n"); 371 return 0; 372} 373 374/* 375 * smbfs_statfs call 376 */ 377int 378smbfs_statfs(struct mount *mp, struct statfs *sbp) 379{ 380 struct thread *td = curthread; 381 struct smbmount *smp = VFSTOSMBFS(mp); 382 struct smbnode *np = smp->sm_root; 383 struct smb_share *ssp = smp->sm_share; 384 struct smb_cred scred; 385 int error = 0; 386 387 if (np == NULL) { 388 vfs_mount_error(mp, "np == NULL"); 389 return EINVAL; 390 } 391 392 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 393 smb_makescred(&scred, td, td->td_ucred); 394 395 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 396 error = smbfs_smb_statfs2(ssp, sbp, &scred); 397 else 398 error = smbfs_smb_statfs(ssp, sbp, &scred); 399 if (error) 400 return error; 401 sbp->f_flags = 0; /* copy of mount exported flags */ 402 return 0; 403} 404