smbfs_vfsops.c revision 198448
1276612Sdes/*- 2276612Sdes * Copyright (c) 2000-2001, Boris Popov 3276612Sdes * All rights reserved. 4294190Sdes * 5276612Sdes * Redistribution and use in source and binary forms, with or without 6276612Sdes * modification, are permitted provided that the following conditions 7276612Sdes * are met: 8276612Sdes * 1. Redistributions of source code must retain the above copyright 9276612Sdes * notice, this list of conditions and the following disclaimer. 10276612Sdes * 2. Redistributions in binary form must reproduce the above copyright 11294190Sdes * notice, this list of conditions and the following disclaimer in the 12276612Sdes * documentation and/or other materials provided with the distribution. 13276612Sdes * 3. All advertising materials mentioning features or use of this software 14276612Sdes * must display the following acknowledgement: 15276612Sdes * This product includes software developed by Boris Popov. 16276612Sdes * 4. Neither the name of the author nor the names of any co-contributors 17276612Sdes * may be used to endorse or promote products derived from this software 18276612Sdes * without specific prior written permission. 19276612Sdes * 20276612Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21276612Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22276612Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23276612Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24276612Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25276612Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26276612Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27276612Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28276612Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29276612Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30276612Sdes * SUCH DAMAGE. 31276612Sdes * 32276612Sdes * $FreeBSD: head/sys/fs/smbfs/smbfs_vfsops.c 198448 2009-10-24 18:49:17Z ru $ 33276612Sdes */ 34276612Sdes 35276612Sdes#include <sys/param.h> 36276612Sdes#include <sys/systm.h> 37276612Sdes#include <sys/proc.h> 38276612Sdes#include <sys/bio.h> 39276612Sdes#include <sys/buf.h> 40276612Sdes#include <sys/kernel.h> 41276612Sdes#include <sys/sysctl.h> 42276612Sdes#include <sys/vnode.h> 43294190Sdes#include <sys/mount.h> 44276612Sdes#include <sys/stat.h> 45276612Sdes#include <sys/malloc.h> 46276612Sdes#include <sys/module.h> 47276612Sdes#include <sys/sx.h> 48276612Sdes 49276612Sdes 50276612Sdes#include <netsmb/smb.h> 51276612Sdes#include <netsmb/smb_conn.h> 52276612Sdes#include <netsmb/smb_subr.h> 53276612Sdes#include <netsmb/smb_dev.h> 54276612Sdes 55276612Sdes#include <fs/smbfs/smbfs.h> 56276612Sdes#include <fs/smbfs/smbfs_node.h> 57276612Sdes#include <fs/smbfs/smbfs_subr.h> 58276612Sdes 59276612Sdesstatic int smbfs_debuglevel = 0; 60276612Sdes 61276612Sdesstatic int smbfs_version = SMBFS_VERSION; 62276612Sdes 63276612Sdes#ifdef SMBFS_USEZONE 64276612Sdes#include <vm/vm.h> 65276612Sdes#include <vm/vm_extern.h> 66276612Sdes 67276612Sdesvm_zone_t smbfsmount_zone; 68276612Sdes#endif 69276612Sdes 70276612SdesSYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem"); 71276612SdesSYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 72276612SdesSYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 73276612Sdes 74276612Sdesstatic MALLOC_DEFINE(M_SMBFSHASH, "smbfs_hash", "SMBFS hash table"); 75276612Sdes 76276612Sdesstatic vfs_init_t smbfs_init; 77276612Sdesstatic vfs_uninit_t smbfs_uninit; 78276612Sdesstatic vfs_cmount_t smbfs_cmount; 79276612Sdesstatic vfs_mount_t smbfs_mount; 80276612Sdesstatic vfs_root_t smbfs_root; 81276612Sdesstatic vfs_quotactl_t smbfs_quotactl; 82276612Sdesstatic vfs_statfs_t smbfs_statfs; 83276612Sdesstatic vfs_unmount_t smbfs_unmount; 84276612Sdes 85276612Sdesstatic struct vfsops smbfs_vfsops = { 86276612Sdes .vfs_init = smbfs_init, 87294190Sdes .vfs_cmount = smbfs_cmount, 88276612Sdes .vfs_mount = smbfs_mount, 89276612Sdes .vfs_quotactl = smbfs_quotactl, 90294190Sdes .vfs_root = smbfs_root, 91291767Sdes .vfs_statfs = smbfs_statfs, 92291767Sdes .vfs_sync = vfs_stdsync, 93291767Sdes .vfs_uninit = smbfs_uninit, 94276612Sdes .vfs_unmount = smbfs_unmount, 95276612Sdes}; 96276612Sdes 97276612Sdes 98276612SdesVFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 99276612Sdes 100276612SdesMODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 101276612SdesMODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 102276612SdesMODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 103276612Sdes 104276612Sdesint smbfs_pbuf_freecnt = -1; /* start out unlimited */ 105276612Sdes 106276612Sdesstatic int 107276612Sdessmbfs_cmount(struct mntarg *ma, void * data, int flags) 108294190Sdes{ 109276612Sdes struct smbfs_args args; 110276612Sdes int error; 111276612Sdes 112276612Sdes error = copyin(data, &args, sizeof(struct smbfs_args)); 113276612Sdes if (error) 114276612Sdes return error; 115276612Sdes 116276612Sdes if (args.version != SMBFS_VERSION) { 117276612Sdes printf("mount version mismatch: kernel=%d, mount=%d\n", 118276612Sdes SMBFS_VERSION, args.version); 119276612Sdes return EINVAL; 120276612Sdes } 121294190Sdes ma = mount_argf(ma, "dev", "%d", args.dev); 122276612Sdes ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft"); 123276612Sdes ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr"); 124276612Sdes ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong"); 125276612Sdes ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls"); 126294190Sdes ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong"); 127276612Sdes ma = mount_arg(ma, "rootpath", args.root_path, -1); 128276612Sdes ma = mount_argf(ma, "uid", "%d", args.uid); 129276612Sdes ma = mount_argf(ma, "gid", "%d", args.gid); 130276612Sdes ma = mount_argf(ma, "file_mode", "%d", args.file_mode); 131276612Sdes ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode); 132276612Sdes ma = mount_argf(ma, "caseopt", "%d", args.caseopt); 133276612Sdes 134276612Sdes error = kernel_mount(ma, flags); 135276612Sdes 136276612Sdes return (error); 137276612Sdes} 138276612Sdes 139276612Sdesstatic const char *smbfs_opts[] = { 140276612Sdes "dev", "soft", "intr", "strong", "have_nls", "long", 141276612Sdes "mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode", 142291767Sdes "caseopt", "errmsg", NULL 143291767Sdes}; 144291767Sdes 145276612Sdesstatic int 146276612Sdessmbfs_mount(struct mount *mp) 147276612Sdes{ 148294190Sdes struct smbmount *smp = NULL; 149285206Sdes struct smb_vc *vcp; 150285206Sdes struct smb_share *ssp = NULL; 151276612Sdes struct vnode *vp; 152276612Sdes struct thread *td; 153276612Sdes struct smb_cred scred; 154276612Sdes int error, v; 155276612Sdes char *pc, *pe; 156276612Sdes 157276612Sdes td = curthread; 158276612Sdes if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS)) 159276612Sdes return EOPNOTSUPP; 160276612Sdes 161276612Sdes if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) { 162276612Sdes vfs_mount_error(mp, "%s", "Invalid option"); 163276612Sdes return (EINVAL); 164276612Sdes } 165276612Sdes 166276612Sdes smb_makescred(&scred, td, td->td_ucred); 167276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, "dev", "%d", &v)) { 168276612Sdes vfs_mount_error(mp, "No dev option"); 169276612Sdes return (EINVAL); 170276612Sdes } 171276612Sdes error = smb_dev2share(v, SMBM_EXEC, &scred, &ssp); 172276612Sdes if (error) { 173276612Sdes printf("invalid device handle %d (%d)\n", v, error); 174276612Sdes vfs_mount_error(mp, "invalid device handle %d (%d)\n", v, error); 175276612Sdes return error; 176276612Sdes } 177276612Sdes vcp = SSTOVC(ssp); 178276612Sdes smb_share_unlock(ssp, 0); 179276612Sdes mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 180276612Sdes 181276612Sdes#ifdef SMBFS_USEZONE 182276612Sdes smp = zalloc(smbfsmount_zone); 183276612Sdes#else 184276612Sdes smp = malloc(sizeof(*smp), M_SMBFSDATA, 185276612Sdes M_WAITOK|M_USE_RESERVE); 186276612Sdes#endif 187276612Sdes if (smp == NULL) { 188276612Sdes printf("could not alloc smbmount\n"); 189276612Sdes vfs_mount_error(mp, "could not alloc smbmount", v, error); 190276612Sdes error = ENOMEM; 191276612Sdes goto bad; 192276612Sdes } 193276612Sdes bzero(smp, sizeof(*smp)); 194276612Sdes mp->mnt_data = smp; 195276612Sdes smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen); 196276612Sdes if (smp->sm_hash == NULL) 197276612Sdes goto bad; 198294190Sdes sx_init(&smp->sm_hashlock, "smbfsh"); 199294190Sdes smp->sm_share = ssp; 200276612Sdes smp->sm_root = NULL; 201276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, 202276612Sdes "caseopt", "%d", &smp->sm_caseopt)) { 203276612Sdes vfs_mount_error(mp, "Invalid caseopt"); 204276612Sdes error = EINVAL; 205276612Sdes goto bad; 206276612Sdes } 207276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) { 208294190Sdes vfs_mount_error(mp, "Invalid uid"); 209276612Sdes error = EINVAL; 210276612Sdes goto bad; 211276612Sdes } 212276612Sdes smp->sm_uid = v; 213276612Sdes 214276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) { 215276612Sdes vfs_mount_error(mp, "Invalid gid"); 216276612Sdes error = EINVAL; 217276612Sdes goto bad; 218276612Sdes } 219276612Sdes smp->sm_gid = v; 220276612Sdes 221276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) { 222294190Sdes vfs_mount_error(mp, "Invalid file_mode"); 223276612Sdes error = EINVAL; 224276612Sdes goto bad; 225276612Sdes } 226276612Sdes smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 227294190Sdes 228276612Sdes if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) { 229276612Sdes vfs_mount_error(mp, "Invalid dir_mode"); 230276612Sdes error = EINVAL; 231294190Sdes goto bad; 232276612Sdes } 233294190Sdes smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 234276612Sdes 235276612Sdes vfs_flagopt(mp->mnt_optnew, 236276612Sdes "nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG); 237294190Sdes 238276612Sdes/* simple_lock_init(&smp->sm_npslock);*/ 239276612Sdes pc = mp->mnt_stat.f_mntfromname; 240276612Sdes pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 241276612Sdes bzero(pc, MNAMELEN); 242276612Sdes *pc++ = '/'; 243276612Sdes *pc++ = '/'; 244276612Sdes pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 245294190Sdes if (pc < pe-1) { 246276612Sdes *(pc++) = '@'; 247276612Sdes pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 248276612Sdes if (pc < pe - 1) { 249276612Sdes *(pc++) = '/'; 250276612Sdes strncpy(pc, ssp->ss_name, pe - pc - 2); 251276612Sdes } 252276612Sdes } 253276612Sdes vfs_getnewfsid(mp); 254276612Sdes error = smbfs_root(mp, LK_EXCLUSIVE, &vp); 255276612Sdes if (error) { 256276612Sdes vfs_mount_error(mp, "smbfs_root error: %d", error); 257276612Sdes goto bad; 258276612Sdes } 259276612Sdes VOP_UNLOCK(vp, 0); 260276612Sdes SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp)); 261294190Sdes 262294190Sdes#ifdef DIAGNOSTIC 263276612Sdes SMBERROR("mp=%p\n", mp); 264276612Sdes#endif 265276612Sdes return error; 266276612Sdesbad: 267276612Sdes if (smp) { 268276612Sdes if (smp->sm_hash) 269276612Sdes free(smp->sm_hash, M_SMBFSHASH); 270294190Sdes sx_destroy(&smp->sm_hashlock); 271276612Sdes#ifdef SMBFS_USEZONE 272276612Sdes zfree(smbfsmount_zone, smp); 273276612Sdes#else 274276612Sdes free(smp, M_SMBFSDATA); 275276612Sdes#endif 276294190Sdes } 277276612Sdes if (ssp) 278276612Sdes smb_share_put(ssp, &scred); 279276612Sdes return error; 280294190Sdes} 281276612Sdes 282276612Sdes/* Unmount the filesystem described by mp. */ 283276612Sdesstatic int 284276612Sdessmbfs_unmount(struct mount *mp, int mntflags) 285276612Sdes{ 286276612Sdes struct thread *td; 287276612Sdes struct smbmount *smp = VFSTOSMBFS(mp); 288276612Sdes struct smb_cred scred; 289276612Sdes int error, flags; 290294190Sdes 291276612Sdes SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 292276612Sdes td = curthread; 293276612Sdes flags = 0; 294291767Sdes if (mntflags & MNT_FORCE) 295291767Sdes flags |= FORCECLOSE; 296291767Sdes /* 297291767Sdes * Keep trying to flush the vnode list for the mount while 298291767Sdes * some are still busy and we are making progress towards 299294190Sdes * making them not busy. This is needed because smbfs vnodes 300294190Sdes * reference their parent directory but may appear after their 301294190Sdes * parent in the list; one pass over the vnode list is not 302294190Sdes * sufficient in this case. 303294190Sdes */ 304276612Sdes do { 305276612Sdes smp->sm_didrele = 0; 306276612Sdes /* There is 1 extra root vnode reference from smbfs_mount(). */ 307294190Sdes error = vflush(mp, 1, flags, td); 308291767Sdes } while (error == EBUSY && smp->sm_didrele != 0); 309291767Sdes if (error) 310291767Sdes return error; 311276612Sdes smb_makescred(&scred, td, td->td_ucred); 312294190Sdes error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); 313294190Sdes if (error) 314294190Sdes return error; 315294190Sdes smb_share_put(smp->sm_share, &scred); 316276612Sdes mp->mnt_data = NULL; 317276612Sdes 318276612Sdes if (smp->sm_hash) 319276612Sdes free(smp->sm_hash, M_SMBFSHASH); 320276612Sdes sx_destroy(&smp->sm_hashlock); 321276612Sdes#ifdef SMBFS_USEZONE 322276612Sdes zfree(smbfsmount_zone, smp); 323294190Sdes#else 324276612Sdes free(smp, M_SMBFSDATA); 325276612Sdes#endif 326276612Sdes MNT_ILOCK(mp); 327276612Sdes mp->mnt_flag &= ~MNT_LOCAL; 328276612Sdes MNT_IUNLOCK(mp); 329276612Sdes return error; 330276612Sdes} 331276612Sdes 332276612Sdes/* 333276612Sdes * Return locked root vnode of a filesystem 334276612Sdes */ 335276612Sdesstatic int 336276612Sdessmbfs_root(struct mount *mp, int flags, struct vnode **vpp) 337276612Sdes{ 338276612Sdes struct smbmount *smp = VFSTOSMBFS(mp); 339276612Sdes struct vnode *vp; 340276612Sdes struct smbnode *np; 341276612Sdes struct smbfattr fattr; 342276612Sdes struct thread *td; 343276612Sdes struct ucred *cred; 344276612Sdes struct smb_cred scred; 345276612Sdes int error; 346276612Sdes 347276612Sdes td = curthread; 348276612Sdes cred = td->td_ucred; 349276612Sdes 350276612Sdes if (smp == NULL) { 351276612Sdes SMBERROR("smp == NULL (bug in umount)\n"); 352276612Sdes vfs_mount_error(mp, "smp == NULL (bug in umount)"); 353276612Sdes return EINVAL; 354276612Sdes } 355276612Sdes if (smp->sm_root) { 356276612Sdes *vpp = SMBTOV(smp->sm_root); 357276612Sdes return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td); 358276612Sdes } 359276612Sdes smb_makescred(&scred, td, cred); 360276612Sdes error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 361276612Sdes if (error) 362276612Sdes return error; 363276612Sdes error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 364276612Sdes if (error) 365276612Sdes return error; 366276612Sdes ASSERT_VOP_LOCKED(vp, "smbfs_root"); 367276612Sdes vp->v_vflag |= VV_ROOT; 368276612Sdes np = VTOSMB(vp); 369276612Sdes smp->sm_root = np; 370276612Sdes *vpp = vp; 371276612Sdes return 0; 372276612Sdes} 373276612Sdes 374291767Sdes/* 375276612Sdes * Do operations associated with quotas, not supported 376276612Sdes */ 377276612Sdes/* ARGSUSED */ 378276612Sdesstatic int 379276612Sdessmbfs_quotactl(mp, cmd, uid, arg) 380276612Sdes struct mount *mp; 381276612Sdes int cmd; 382294190Sdes uid_t uid; 383276612Sdes void *arg; 384276612Sdes{ 385276612Sdes SMBVDEBUG("return EOPNOTSUPP\n"); 386276612Sdes return EOPNOTSUPP; 387276612Sdes} 388276612Sdes 389276612Sdes/*ARGSUSED*/ 390276612Sdesint 391276612Sdessmbfs_init(struct vfsconf *vfsp) 392294190Sdes{ 393276612Sdes#ifdef SMBFS_USEZONE 394276612Sdes smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1); 395276612Sdes#endif 396276612Sdes smbfs_pbuf_freecnt = nswbuf / 2 + 1; 397276612Sdes SMBVDEBUG("done.\n"); 398276612Sdes return 0; 399276612Sdes} 400276612Sdes 401276612Sdes/*ARGSUSED*/ 402276612Sdesint 403276612Sdessmbfs_uninit(struct vfsconf *vfsp) 404276612Sdes{ 405276612Sdes 406276612Sdes SMBVDEBUG("done.\n"); 407276612Sdes return 0; 408276612Sdes} 409276612Sdes 410276612Sdes/* 411276612Sdes * smbfs_statfs call 412276612Sdes */ 413276612Sdesint 414276612Sdessmbfs_statfs(struct mount *mp, struct statfs *sbp) 415276612Sdes{ 416276612Sdes struct thread *td = curthread; 417294190Sdes struct smbmount *smp = VFSTOSMBFS(mp); 418276612Sdes struct smbnode *np = smp->sm_root; 419276612Sdes struct smb_share *ssp = smp->sm_share; 420276612Sdes struct smb_cred scred; 421276612Sdes int error = 0; 422276612Sdes 423276612Sdes if (np == NULL) { 424276612Sdes vfs_mount_error(mp, "np == NULL"); 425276612Sdes return EINVAL; 426276612Sdes } 427276612Sdes 428276612Sdes sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 429276612Sdes smb_makescred(&scred, td, td->td_ucred); 430276612Sdes 431276612Sdes if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 432276612Sdes error = smbfs_smb_statfs2(ssp, sbp, &scred); 433276612Sdes else 434276612Sdes error = smbfs_smb_statfs(ssp, sbp, &scred); 435276612Sdes if (error) 436276612Sdes return error; 437276612Sdes sbp->f_flags = 0; /* copy of mount exported flags */ 438276612Sdes return 0; 439276612Sdes} 440276612Sdes