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