Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/nwfs/nwfs_vfsops.c
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1 /* 2 * Copyright (c) 1999, 2000 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: releng/5.0/sys/fs/nwfs/nwfs_vfsops.c 103936 2002-09-25 02:32:42Z jeff $ 33 */ 34 #include "opt_ncp.h" 35 #ifndef NCP 36 #error "NWFS requires NCP protocol" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/kernel.h> 43 #include <sys/sysctl.h> 44 #include <sys/vnode.h> 45 #include <sys/mount.h> 46 #include <sys/stat.h> 47 #include <sys/malloc.h> 48 #include <sys/bio.h> 49 #include <sys/buf.h> 50 51 #include <netncp/ncp.h> 52 #include <netncp/ncp_conn.h> 53 #include <netncp/ncp_subr.h> 54 #include <netncp/ncp_ncp.h> 55 #include <netncp/ncp_nls.h> 56 57 #include <fs/nwfs/nwfs.h> 58 #include <fs/nwfs/nwfs_node.h> 59 #include <fs/nwfs/nwfs_subr.h> 60 61 int nwfs_debuglevel = 0; 62 63 static int nwfs_version = NWFS_VERSION; 64 65 SYSCTL_DECL(_vfs_nwfs); 66 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem"); 67 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, ""); 68 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, ""); 69 70 MODULE_DEPEND(nwfs, ncp, 1, 1, 1); 71 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1); 72 73 static int nwfs_mount(struct mount *, char *, caddr_t, 74 struct nameidata *, struct thread *); 75 static int nwfs_quotactl(struct mount *, int, uid_t, caddr_t, struct thread *); 76 static int nwfs_root(struct mount *, struct vnode **); 77 static int nwfs_start(struct mount *, int, struct thread *); 78 static int nwfs_statfs(struct mount *, struct statfs *, struct thread *); 79 static int nwfs_sync(struct mount *, int, struct ucred *, struct thread *); 80 static int nwfs_unmount(struct mount *, int, struct thread *); 81 static int nwfs_init(struct vfsconf *vfsp); 82 static int nwfs_uninit(struct vfsconf *vfsp); 83 84 static struct vfsops nwfs_vfsops = { 85 nwfs_mount, 86 nwfs_start, 87 nwfs_unmount, 88 nwfs_root, 89 nwfs_quotactl, 90 nwfs_statfs, 91 nwfs_sync, 92 vfs_stdvget, 93 vfs_stdfhtovp, /* shouldn't happen */ 94 vfs_stdcheckexp, 95 vfs_stdvptofh, /* shouldn't happen */ 96 nwfs_init, 97 nwfs_uninit, 98 vfs_stdextattrctl, 99 }; 100 101 102 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK); 103 104 int nwfs_pbuf_freecnt = -1; /* start out unlimited */ 105 static int nwfsid = 1; 106 107 static int 108 nwfs_initnls(struct nwmount *nmp) { 109 char *pc, *pe; 110 int error = 0; 111 #define COPY_TABLE(t,d) { \ 112 if (t) { \ 113 error = copyin((t), pc, 256); \ 114 if (error) break; \ 115 } else \ 116 bcopy(d, pc, 256); \ 117 (t) = pc; pc += 256; \ 118 } 119 120 nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS; 121 if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) { 122 nmp->m.nls.to_lower = ncp_defnls.to_lower; 123 nmp->m.nls.to_upper = ncp_defnls.to_upper; 124 nmp->m.nls.n2u = ncp_defnls.n2u; 125 nmp->m.nls.u2n = ncp_defnls.u2n; 126 return 0; 127 } 128 MALLOC(pe, char *, 256 * 4, M_NWFSDATA, M_WAITOK); 129 pc = pe; 130 do { 131 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower); 132 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper); 133 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u); 134 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n); 135 } while(0); 136 if (error) { 137 free(pe, M_NWFSDATA); 138 return error; 139 } 140 return 0; 141 } 142 /* 143 * mp - path - addr in user space of mount point (ie /usr or whatever) 144 * data - addr in user space of mount params 145 */ 146 static int nwfs_mount(struct mount *mp, char *path, caddr_t data, 147 struct nameidata *ndp, struct thread *td) 148 { 149 struct nwfs_args args; /* will hold data from mount request */ 150 int error; 151 struct nwmount *nmp = NULL; 152 struct ncp_conn *conn = NULL; 153 struct ncp_handle *handle = NULL; 154 struct vnode *vp; 155 char *pc,*pe; 156 157 if (data == NULL) { 158 nwfs_printf("missing data argument\n"); 159 return 1; 160 } 161 if (mp->mnt_flag & MNT_UPDATE) { 162 nwfs_printf("MNT_UPDATE not implemented"); 163 return (EOPNOTSUPP); 164 } 165 error = copyin(data, (caddr_t)&args, sizeof(struct nwfs_args)); 166 if (error) 167 return (error); 168 if (args.version != NWFS_VERSION) { 169 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version); 170 return (1); 171 } 172 error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn); 173 if (error) { 174 nwfs_printf("invalid connection refernce %d\n",args.connRef); 175 return (error); 176 } 177 error = ncp_conn_gethandle(conn, NULL, &handle); 178 if (error) { 179 nwfs_printf("can't get connection handle\n"); 180 return (error); 181 } 182 ncp_conn_unlock(conn, td); /* we keep the ref */ 183 mp->mnt_stat.f_iosize = conn->buffer_size; 184 /* We must malloc our own mount info */ 185 MALLOC(nmp,struct nwmount *,sizeof(struct nwmount),M_NWFSDATA,M_USE_RESERVE | M_ZERO); 186 if (nmp == NULL) { 187 nwfs_printf("could not alloc nwmount\n"); 188 error = ENOMEM; 189 goto bad; 190 } 191 mp->mnt_data = (qaddr_t)nmp; 192 nmp->connh = handle; 193 nmp->n_root = NULL; 194 nmp->n_id = nwfsid++; 195 nmp->m = args; 196 nmp->m.file_mode = (nmp->m.file_mode & 197 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 198 nmp->m.dir_mode = (nmp->m.dir_mode & 199 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 200 if ((error = nwfs_initnls(nmp)) != 0) goto bad; 201 pc = mp->mnt_stat.f_mntfromname; 202 pe = pc+sizeof(mp->mnt_stat.f_mntfromname); 203 bzero(pc, MNAMELEN); 204 *(pc++) = '/'; 205 pc = index(strncpy(pc, conn->li.server, pe-pc-2),0); 206 if (pc < pe-1) { 207 *(pc++) = ':'; 208 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0); 209 if (pc < pe-1) { 210 *(pc++) = '/'; 211 strncpy(pc, nmp->m.mounted_vol, pe-pc-2); 212 } 213 } 214 /* protect against invalid mount points */ 215 nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0'; 216 vfs_getnewfsid(mp); 217 error = nwfs_root(mp, &vp); 218 if (error) 219 goto bad; 220 /* 221 * Lose the lock but keep the ref. 222 */ 223 VOP_UNLOCK(vp, 0, curthread); 224 NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp)); 225 return error; 226 bad: 227 if (nmp) 228 free(nmp, M_NWFSDATA); 229 if (handle) 230 ncp_conn_puthandle(handle, NULL, 0); 231 return error; 232 } 233 234 /* Unmount the filesystem described by mp. */ 235 static int 236 nwfs_unmount(struct mount *mp, int mntflags, struct thread *td) 237 { 238 struct nwmount *nmp = VFSTONWFS(mp); 239 struct ncp_conn *conn; 240 int error, flags; 241 242 NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags); 243 flags = 0; 244 if (mntflags & MNT_FORCE) 245 flags |= FORCECLOSE; 246 /* There is 1 extra root vnode reference from nwfs_mount(). */ 247 error = vflush(mp, 1, flags); 248 if (error) 249 return (error); 250 conn = NWFSTOCONN(nmp); 251 ncp_conn_puthandle(nmp->connh,NULL,0); 252 if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) { 253 if(ncp_conn_free(conn)) 254 ncp_conn_unlock(conn, td); 255 } 256 mp->mnt_data = (qaddr_t)0; 257 if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS) 258 free(nmp->m.nls.to_lower, M_NWFSDATA); 259 free(nmp, M_NWFSDATA); 260 mp->mnt_flag &= ~MNT_LOCAL; 261 return (error); 262 } 263 264 /* Return locked vnode to root of a filesystem */ 265 static int 266 nwfs_root(struct mount *mp, struct vnode **vpp) { 267 struct vnode *vp; 268 struct nwmount *nmp; 269 struct nwnode *np; 270 struct ncp_conn *conn; 271 struct nw_entry_info fattr; 272 struct thread *td = curthread; 273 struct ucred *cred = td->td_ucred; 274 int error, nsf, opt; 275 u_char vol; 276 277 nmp = VFSTONWFS(mp); 278 conn = NWFSTOCONN(nmp); 279 if (nmp->n_root) { 280 *vpp = NWTOV(nmp->n_root); 281 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0) 282 ; 283 return 0; 284 } 285 error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 286 &nmp->n_rootent.f_id, td, cred); 287 if (error) 288 return ENOENT; 289 nmp->n_volume = vol; 290 error = ncp_get_namespaces(conn, vol, &nsf, td, cred); 291 if (error) 292 return ENOENT; 293 if (nsf & NW_NSB_OS2) { 294 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol); 295 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) { 296 nmp->name_space = NW_NS_OS2; 297 nmp->m.nls.opt &= ~NWHP_DOS; 298 } 299 } 300 opt = nmp->m.nls.opt; 301 nsf = opt & (NWHP_UPPER | NWHP_LOWER); 302 if (opt & NWHP_DOS) { 303 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 304 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 305 } else if (nsf == 0) { 306 nmp->m.nls.opt |= NWHP_LOWER; 307 } 308 } else { 309 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 310 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 311 } 312 } 313 if (nmp->m.root_path[0]) { 314 nmp->m.root_path[0]--; 315 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 316 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 317 if (error) { 318 NCPFATAL("Invalid root path specified\n"); 319 return ENOENT; 320 } 321 nmp->n_rootent.f_parent = fattr.dirEntNum; 322 nmp->m.root_path[0]++; 323 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 324 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 325 if (error) { 326 NCPFATAL("Invalid root path specified\n"); 327 return ENOENT; 328 } 329 nmp->n_rootent.f_id = fattr.dirEntNum; 330 } else { 331 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 332 0, NULL, &fattr, td, cred); 333 if (error) { 334 NCPFATAL("Can't obtain volume info\n"); 335 return ENOENT; 336 } 337 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT")); 338 nmp->n_rootent.f_parent = nmp->n_rootent.f_id; 339 } 340 error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp); 341 if (error) 342 return (error); 343 vp->v_vflag |= VV_ROOT; 344 np = VTONW(vp); 345 if (nmp->m.root_path[0] == 0) 346 np->n_flag |= NVOLUME; 347 nmp->n_root = np; 348 /* error = VOP_GETATTR(vp, &vattr, cred, td); 349 if (error) { 350 vput(vp); 351 NCPFATAL("Can't get root directory entry\n"); 352 return error; 353 }*/ 354 *vpp = vp; 355 return (0); 356 } 357 358 /* 359 * Vfs start routine, a no-op. 360 */ 361 /* ARGSUSED */ 362 static int 363 nwfs_start(mp, flags, td) 364 struct mount *mp; 365 int flags; 366 struct thread *td; 367 { 368 NCPVODEBUG("flags=%04x\n",flags); 369 return (0); 370 } 371 372 /* 373 * Do operations associated with quotas, not supported 374 */ 375 /* ARGSUSED */ 376 static int 377 nwfs_quotactl(mp, cmd, uid, arg, td) 378 struct mount *mp; 379 int cmd; 380 uid_t uid; 381 caddr_t arg; 382 struct thread *td; 383 { 384 NCPVODEBUG("return EOPNOTSUPP\n"); 385 return (EOPNOTSUPP); 386 } 387 388 /*ARGSUSED*/ 389 int 390 nwfs_init(struct vfsconf *vfsp) 391 { 392 #ifndef SMP 393 int name[2]; 394 int olen, ncpu, plen, error; 395 396 name[0] = CTL_HW; 397 name[1] = HW_NCPU; 398 error = kernel_sysctl(curthread, name, 2, &ncpu, &olen, NULL, 0, &plen); 399 if (error == 0 && ncpu > 1) 400 printf("warning: nwfs module compiled without SMP support."); 401 #endif 402 nwfs_hash_init(); 403 nwfs_pbuf_freecnt = nswbuf / 2 + 1; 404 NCPVODEBUG("always happy to load!\n"); 405 return (0); 406 } 407 408 /*ARGSUSED*/ 409 int 410 nwfs_uninit(struct vfsconf *vfsp) 411 { 412 413 nwfs_hash_free(); 414 NCPVODEBUG("unloaded\n"); 415 return (0); 416 } 417 418 /* 419 * nwfs_statfs call 420 */ 421 int 422 nwfs_statfs(mp, sbp, td) 423 struct mount *mp; 424 struct statfs *sbp; 425 struct thread *td; 426 { 427 struct nwmount *nmp = VFSTONWFS(mp); 428 int error = 0, secsize; 429 struct nwnode *np = nmp->n_root; 430 struct ncp_volume_info vi; 431 432 if (np == NULL) return EINVAL; 433 error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp), 434 nmp->n_volume, &vi, td, td->td_ucred); 435 if (error) return error; 436 secsize = 512; /* XXX how to get real value ??? */ 437 sbp->f_spare2=0; /* placeholder */ 438 /* fundamental filesystem block size */ 439 sbp->f_bsize = vi.sectors_per_block*secsize; 440 /* optimal transfer block size */ 441 sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size; 442 /* total data blocks in filesystem */ 443 sbp->f_blocks= vi.total_blocks; 444 /* free blocks in fs */ 445 sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks; 446 /* free blocks avail to non-superuser */ 447 sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks; 448 /* total file nodes in filesystem */ 449 sbp->f_files = vi.total_dir_entries; 450 /* free file nodes in fs */ 451 sbp->f_ffree = vi.available_dir_entries; 452 sbp->f_flags = 0; /* copy of mount exported flags */ 453 if (sbp != &mp->mnt_stat) { 454 sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */ 455 sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ 456 sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ 457 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 458 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 459 } 460 strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 461 return 0; 462 } 463 464 /* 465 * Flush out the buffer cache 466 */ 467 /* ARGSUSED */ 468 static int 469 nwfs_sync(mp, waitfor, cred, td) 470 struct mount *mp; 471 int waitfor; 472 struct ucred *cred; 473 struct thread *td; 474 { 475 struct vnode *vp, *nvp; 476 int error, allerror = 0; 477 /* 478 * Force stale buffer cache information to be flushed. 479 */ 480 mtx_lock(&mntvnode_mtx); 481 loop: 482 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); 483 vp != NULL; 484 vp = nvp) { 485 /* 486 * If the vnode that we are about to sync is no longer 487 * associated with this mount point, start over. 488 */ 489 if (vp->v_mount != mp) 490 goto loop; 491 nvp = TAILQ_NEXT(vp, v_nmntvnodes); 492 mtx_unlock(&mntvnode_mtx); 493 VI_LOCK(vp); 494 if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || 495 waitfor == MNT_LAZY) { 496 VI_UNLOCK(vp); 497 mtx_lock(&mntvnode_mtx); 498 continue; 499 } 500 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { 501 mtx_lock(&mntvnode_mtx); 502 goto loop; 503 } 504 error = VOP_FSYNC(vp, cred, waitfor, td); 505 if (error) 506 allerror = error; 507 vput(vp); 508 mtx_lock(&mntvnode_mtx); 509 } 510 mtx_unlock(&mntvnode_mtx); 511 return (allerror); 512 }
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