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: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.2.2.5 2003/01/17 08:20:26 tjr Exp $ 33 */ 34 35 #ifndef KLD_MODULE 36 #include "opt_netsmb.h" 37 #ifndef NETSMB 38 #error "SMBFS requires option NETSMB" 39 #endif 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 #include <sys/stat.h> 50 #include <sys/malloc.h> 51 #include <sys/module.h> 52 53 54 #include <netproto/smb/smb.h> 55 #include <netproto/smb/smb_conn.h> 56 #include <netproto/smb/smb_subr.h> 57 #include <netproto/smb/smb_dev.h> 58 59 #include "smbfs.h" 60 #include "smbfs_node.h" 61 #include "smbfs_subr.h" 62 63 #include <sys/buf.h> 64 65 extern struct vop_ops smbfs_vnode_vops; 66 67 int smbfs_debuglevel = 0; 68 69 static int smbfs_version = SMBFS_VERSION; 70 71 SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); 72 SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); 73 SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); 74 75 static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); 76 77 78 static int smbfs_mount(struct mount *, char *, caddr_t, struct ucred *); 79 static int smbfs_root(struct mount *, struct vnode **); 80 static int smbfs_statfs(struct mount *, struct statfs *, struct ucred *); 81 static int smbfs_sync(struct mount *, int); 82 static int smbfs_unmount(struct mount *, int); 83 static int smbfs_init(struct vfsconf *vfsp); 84 static int smbfs_uninit(struct vfsconf *vfsp); 85 86 static struct vfsops smbfs_vfsops = { 87 .vfs_flags = 0, 88 .vfs_mount = smbfs_mount, 89 .vfs_unmount = smbfs_unmount, 90 .vfs_root = smbfs_root, 91 .vfs_statfs = smbfs_statfs, 92 .vfs_sync = smbfs_sync, 93 .vfs_init = smbfs_init, 94 .vfs_uninit = smbfs_uninit 95 }; 96 97 98 VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); 99 MODULE_VERSION(smbfs, 1); 100 101 MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); 102 MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); 103 MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); 104 105 int smbfs_pbuf_freecnt = -1; /* start out unlimited */ 106 107 static int 108 smbfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 109 { 110 struct smbfs_args args; /* will hold data from mount request */ 111 struct smbmount *smp = NULL; 112 struct smb_vc *vcp; 113 struct smb_share *ssp = NULL; 114 struct vnode *vp; 115 struct smb_cred scred; 116 int error; 117 int hsize; 118 char *pc, *pe; 119 120 if (data == NULL) { 121 kprintf("missing data argument\n"); 122 return EINVAL; 123 } 124 if (mp->mnt_flag & MNT_UPDATE) { 125 kprintf("MNT_UPDATE not implemented"); 126 return EOPNOTSUPP; 127 } 128 error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); 129 if (error) 130 return error; 131 if (args.version != SMBFS_VERSION) { 132 kprintf("mount version mismatch: kernel=%d, mount=%d\n", 133 SMBFS_VERSION, args.version); 134 return EINVAL; 135 } 136 smb_makescred(&scred, curthread, cred); 137 error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); 138 if (error) { 139 kprintf("invalid device handle %d (%d)\n", args.dev, error); 140 return error; 141 } 142 vcp = SSTOVC(ssp); 143 smb_share_unlock(ssp, 0); 144 mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; 145 146 smp = kmalloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_USE_RESERVE | M_ZERO); 147 mp->mnt_data = (qaddr_t)smp; 148 smp->sm_cred = crhold(cred); 149 150 hsize = vfs_inodehashsize(); 151 smp->sm_hash = hashinit(hsize, M_SMBFSHASH, &smp->sm_hashlen); 152 if (smp->sm_hash == NULL) 153 goto bad; 154 lockinit(&smp->sm_hashlock, "smbfsh", 0, 0); 155 smp->sm_share = ssp; 156 smp->sm_root = NULL; 157 smp->sm_args = args; 158 smp->sm_caseopt = args.caseopt; 159 smp->sm_args.file_mode = (smp->sm_args.file_mode & 160 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 161 smp->sm_args.dir_mode = (smp->sm_args.dir_mode & 162 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 163 164 /* simple_lock_init(&smp->sm_npslock);*/ 165 pc = mp->mnt_stat.f_mntfromname; 166 pe = pc + sizeof(mp->mnt_stat.f_mntfromname); 167 bzero(pc, MNAMELEN); 168 *pc++ = '/'; 169 *pc++ = '/'; 170 pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); 171 if (pc < pe-1) { 172 *(pc++) = '@'; 173 pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); 174 if (pc < pe - 1) { 175 *(pc++) = '/'; 176 strncpy(pc, ssp->ss_name, pe - pc - 2); 177 } 178 } 179 /* protect against invalid mount points */ 180 smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; 181 vfs_getnewfsid(mp); 182 183 vfs_add_vnodeops(mp, &smbfs_vnode_vops, &mp->mnt_vn_norm_ops); 184 185 error = smbfs_root(mp, &vp); 186 if (error) 187 goto bad; 188 vn_unlock(vp); 189 SMBVDEBUG("root.v_refcnt = %08x\n", vp->v_refcnt); 190 191 #ifdef DIAGNOSTICS 192 SMBERROR("mp=%p\n", mp); 193 #endif 194 return error; 195 bad: 196 if (smp) { 197 if (smp->sm_cred) 198 crfree(smp->sm_cred); 199 if (smp->sm_hash) 200 hashdestroy(smp->sm_hash, M_SMBFSHASH, 201 smp->sm_hashlen); 202 lockdestroy(&smp->sm_hashlock); 203 kfree(smp, M_SMBFSDATA); 204 } 205 if (ssp) 206 smb_share_put(ssp, &scred); 207 return error; 208 } 209 210 /* Unmount the filesystem described by mp. */ 211 static int 212 smbfs_unmount(struct mount *mp, int mntflags) 213 { 214 struct smbmount *smp = VFSTOSMBFS(mp); 215 struct smb_cred scred; 216 int error, flags; 217 218 SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); 219 flags = 0; 220 if (mntflags & MNT_FORCE) 221 flags |= FORCECLOSE; 222 /* 223 * Keep trying to flush the vnode list for the mount while 224 * some are still busy and we are making progress towards 225 * making them not busy. This is needed because smbfs vnodes 226 * reference their parent directory but may appear after their 227 * parent in the list; one pass over the vnode list is not 228 * sufficient in this case. 229 */ 230 do { 231 smp->sm_didrele = 0; 232 /* There is 1 extra root vnode reference from smbfs_mount(). */ 233 error = vflush(mp, 1, flags); 234 } while (error == EBUSY && smp->sm_didrele != 0); 235 if (error) 236 return error; 237 smb_makescred(&scred, curthread, smp->sm_cred); 238 error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); 239 if (error) 240 goto out; 241 smb_share_put(smp->sm_share, &scred); 242 mp->mnt_data = (qaddr_t)0; 243 244 if (smp->sm_cred) 245 crfree(smp->sm_cred); 246 if (smp->sm_hash) 247 hashdestroy(smp->sm_hash, M_SMBFSHASH, smp->sm_hashlen); 248 lockdestroy(&smp->sm_hashlock); 249 kfree(smp, M_SMBFSDATA); 250 mp->mnt_flag &= ~MNT_LOCAL; 251 out: 252 return error; 253 } 254 255 /* 256 * Return locked root vnode of a filesystem 257 */ 258 static int 259 smbfs_root(struct mount *mp, struct vnode **vpp) 260 { 261 struct thread *td = curthread; /* XXX */ 262 struct smbmount *smp = VFSTOSMBFS(mp); 263 struct vnode *vp; 264 struct smbnode *np; 265 struct smbfattr fattr; 266 struct ucred *cred; 267 struct smb_cred scred; 268 int error; 269 270 if (smp == NULL) { 271 SMBERROR("smp == NULL (bug in umount)\n"); 272 return EINVAL; 273 } 274 if (smp->sm_root) { 275 *vpp = SMBTOV(smp->sm_root); 276 return vget(*vpp, LK_EXCLUSIVE | LK_RETRY); 277 } 278 if (td->td_proc) 279 cred = td->td_proc->p_ucred; 280 else 281 cred = proc0.p_ucred; 282 283 smb_makescred(&scred, td, cred); 284 error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); 285 if (error) 286 return error; 287 error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); 288 if (error) 289 return error; 290 vsetflags(vp, VROOT); 291 np = VTOSMB(vp); 292 smp->sm_root = np; 293 *vpp = vp; 294 return 0; 295 } 296 297 /*ARGSUSED*/ 298 int 299 smbfs_init(struct vfsconf *vfsp) 300 { 301 smbfs_pbuf_freecnt = nswbuf_kva / 2 + 1; 302 SMBVDEBUG("done.\n"); 303 return 0; 304 } 305 306 /*ARGSUSED*/ 307 int 308 smbfs_uninit(struct vfsconf *vfsp) 309 { 310 SMBVDEBUG("done.\n"); 311 return 0; 312 } 313 314 /* 315 * smbfs_statfs call 316 */ 317 int 318 smbfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 319 { 320 struct smbmount *smp = VFSTOSMBFS(mp); 321 struct smbnode *np = smp->sm_root; 322 struct smb_share *ssp = smp->sm_share; 323 struct smb_cred scred; 324 int error = 0; 325 326 if (np == NULL) 327 return EINVAL; 328 329 sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ 330 sbp->f_spare2 = 0; /* placeholder */ 331 smb_makescred(&scred, curthread, cred); 332 333 if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) 334 error = smbfs_smb_statfs2(ssp, sbp, &scred); 335 else 336 error = smbfs_smb_statfs(ssp, sbp, &scred); 337 if (error) 338 return error; 339 sbp->f_flags = 0; /* copy of mount exported flags */ 340 if (sbp != &mp->mnt_stat) { 341 sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ 342 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 343 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 344 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 345 } 346 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 347 return 0; 348 } 349 350 /* 351 * Flush out the buffer cache 352 */ 353 /* ARGSUSED */ 354 static int 355 smbfs_sync(struct mount *mp, int waitfor) 356 { 357 struct vnode *vp; 358 int error, allerror = 0; 359 /* 360 * Force stale buffer cache information to be flushed. 361 */ 362 loop: 363 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 364 vp != NULL; 365 vp = TAILQ_NEXT(vp, v_nmntvnodes)) { 366 /* 367 * If the vnode that we are about to sync is no longer 368 * associated with this mount point, start over. 369 */ 370 if (vp->v_mount != mp) 371 goto loop; 372 if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) || 373 (waitfor & MNT_LAZY)) 374 continue; 375 if (vget(vp, LK_EXCLUSIVE)) 376 goto loop; 377 error = VOP_FSYNC(vp, waitfor, 0); 378 if (error) 379 allerror = error; 380 vput(vp); 381 } 382 return (allerror); 383 } 384