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