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 * $FreeBSD$ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/kernel.h> 39 #include <sys/sysctl.h> 40 #include <sys/vnode.h> 41 #include <sys/mount.h> 42 #include <sys/stat.h> 43 #include <sys/malloc.h> 44 #include <sys/bio.h> 45 #include <sys/buf.h> 46 47 #include <netncp/ncp.h> 48 #include <netncp/ncp_conn.h> 49 #include <netncp/ncp_subr.h> 50 #include <netncp/ncp_ncp.h> 51 #include <netncp/ncp_nls.h> 52 53 #include <fs/nwfs/nwfs.h> 54 #include <fs/nwfs/nwfs_node.h> 55 #include <fs/nwfs/nwfs_subr.h> 56 57 int nwfs_debuglevel = 0; 58 59 static int nwfs_version = NWFS_VERSION; 60 61 SYSCTL_DECL(_vfs_nwfs); 62 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem"); 63 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, ""); 64 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, ""); 65 66 MODULE_DEPEND(nwfs, ncp, 1, 1, 1); 67 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1); 68 69 static vfs_cmount_t nwfs_cmount; 70 static vfs_mount_t nwfs_mount; 71 static vfs_quotactl_t nwfs_quotactl; 72 static vfs_root_t nwfs_root; 73 static vfs_statfs_t nwfs_statfs; 74 static vfs_unmount_t nwfs_unmount; 75 static vfs_init_t nwfs_init; 76 static vfs_uninit_t nwfs_uninit; 77 78 static struct vfsops nwfs_vfsops = { 79 .vfs_init = nwfs_init, 80 .vfs_mount = nwfs_mount, 81 .vfs_cmount = nwfs_cmount, 82 .vfs_quotactl = nwfs_quotactl, 83 .vfs_root = nwfs_root, 84 .vfs_statfs = nwfs_statfs, 85 .vfs_sync = vfs_stdsync, 86 .vfs_uninit = nwfs_uninit, 87 .vfs_unmount = nwfs_unmount, 88 }; 89 90 91 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK); 92 93 int nwfs_pbuf_freecnt = -1; /* start out unlimited */ 94 static int nwfsid = 1; 95 96 static int 97 nwfs_initnls(struct nwmount *nmp) { 98 char *pc, *pe; 99 int error = 0; 100 #define COPY_TABLE(t,d) { \ 101 if (t) { \ 102 error = copyin((t), pc, 256); \ 103 if (error) break; \ 104 } else \ 105 bcopy(d, pc, 256); \ 106 (t) = pc; pc += 256; \ 107 } 108 109 nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS; 110 if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) { 111 nmp->m.nls.to_lower = ncp_defnls.to_lower; 112 nmp->m.nls.to_upper = ncp_defnls.to_upper; 113 nmp->m.nls.n2u = ncp_defnls.n2u; 114 nmp->m.nls.u2n = ncp_defnls.u2n; 115 return 0; 116 } 117 pe = malloc(256 * 4, M_NWFSDATA, M_WAITOK); 118 pc = pe; 119 do { 120 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower); 121 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper); 122 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u); 123 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n); 124 } while(0); 125 if (error) { 126 free(pe, M_NWFSDATA); 127 return error; 128 } 129 return 0; 130 } 131 132 static int nwfs_cmount(struct mntarg *ma, void *data, int flags) 133 { 134 struct nwfs_args args; /* will hold data from mount request */ 135 int error; 136 137 error = copyin(data, &args, sizeof(struct nwfs_args)); 138 if (error) 139 return (error); 140 141 /* 142 * XXX: cheap cop-out here, args contains a structure I don't 143 * XXX: know how we should handle, and I don't see any immediate 144 * XXX: prospect of avoiding a mount_nwfs(8) binary anyway. 145 */ 146 ma = mount_arg(ma, "nwfs_args", &args, sizeof args); 147 148 error = kernel_mount(ma, flags); 149 150 return (error); 151 } 152 153 /* 154 * mp - path - addr in user space of mount point (ie /usr or whatever) 155 * data - addr in user space of mount params 156 */ 157 static int nwfs_mount(struct mount *mp) 158 { 159 struct nwfs_args args; /* will hold data from mount request */ 160 int error; 161 struct nwmount *nmp = NULL; 162 struct ncp_conn *conn = NULL; 163 struct ncp_handle *handle = NULL; 164 struct vnode *vp; 165 struct thread *td; 166 char *pc,*pe; 167 168 td = curthread; 169 if (mp->mnt_flag & MNT_ROOTFS) 170 return (EOPNOTSUPP); 171 if (mp->mnt_flag & MNT_UPDATE) { 172 nwfs_printf("MNT_UPDATE not implemented"); 173 return (EOPNOTSUPP); 174 } 175 error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args); 176 if (error) 177 return (error); 178 if (args.version != NWFS_VERSION) { 179 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version); 180 return (1); 181 } 182 error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn); 183 if (error) { 184 nwfs_printf("invalid connection refernce %d\n",args.connRef); 185 return (error); 186 } 187 error = ncp_conn_gethandle(conn, NULL, &handle); 188 if (error) { 189 nwfs_printf("can't get connection handle\n"); 190 return (error); 191 } 192 ncp_conn_unlock(conn, td); /* we keep the ref */ 193 mp->mnt_stat.f_iosize = conn->buffer_size; 194 /* We must malloc our own mount info */ 195 nmp = malloc(sizeof(struct nwmount),M_NWFSDATA, 196 M_WAITOK | M_USE_RESERVE | M_ZERO); 197 if (nmp == NULL) { 198 nwfs_printf("could not alloc nwmount\n"); 199 error = ENOMEM; 200 goto bad; 201 } 202 mp->mnt_data = nmp; 203 nmp->connh = handle; 204 nmp->n_root = NULL; 205 nmp->n_id = nwfsid++; 206 nmp->m = args; 207 nmp->m.file_mode = (nmp->m.file_mode & 208 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 209 nmp->m.dir_mode = (nmp->m.dir_mode & 210 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 211 if ((error = nwfs_initnls(nmp)) != 0) goto bad; 212 pc = mp->mnt_stat.f_mntfromname; 213 pe = pc+sizeof(mp->mnt_stat.f_mntfromname); 214 bzero(pc, MNAMELEN); 215 *(pc++) = '/'; 216 pc = index(strncpy(pc, conn->li.server, pe-pc-2),0); 217 if (pc < pe-1) { 218 *(pc++) = ':'; 219 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0); 220 if (pc < pe-1) { 221 *(pc++) = '/'; 222 strncpy(pc, nmp->m.mounted_vol, pe-pc-2); 223 } 224 } 225 /* protect against invalid mount points */ 226 nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0'; 227 vfs_getnewfsid(mp); 228 error = nwfs_root(mp, LK_EXCLUSIVE, &vp); 229 if (error) 230 goto bad; 231 /* 232 * Lose the lock but keep the ref. 233 */ 234 VOP_UNLOCK(vp, 0); 235 NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp)); 236 return error; 237 bad: 238 if (nmp) 239 free(nmp, M_NWFSDATA); 240 if (handle) 241 ncp_conn_puthandle(handle, NULL, 0); 242 return error; 243 } 244 245 /* Unmount the filesystem described by mp. */ 246 static int 247 nwfs_unmount(struct mount *mp, int mntflags) 248 { 249 struct thread *td; 250 struct nwmount *nmp = VFSTONWFS(mp); 251 struct ncp_conn *conn; 252 int error, flags; 253 254 NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags); 255 td = curthread; 256 flags = 0; 257 if (mntflags & MNT_FORCE) 258 flags |= FORCECLOSE; 259 /* There is 1 extra root vnode reference from nwfs_mount(). */ 260 error = vflush(mp, 1, flags, td); 261 if (error) 262 return (error); 263 conn = NWFSTOCONN(nmp); 264 ncp_conn_puthandle(nmp->connh,NULL,0); 265 if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) { 266 if(ncp_conn_free(conn)) 267 ncp_conn_unlock(conn, td); 268 } 269 mp->mnt_data = NULL; 270 if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS) 271 free(nmp->m.nls.to_lower, M_NWFSDATA); 272 free(nmp, M_NWFSDATA); 273 MNT_ILOCK(mp); 274 mp->mnt_flag &= ~MNT_LOCAL; 275 MNT_IUNLOCK(mp); 276 return (error); 277 } 278 279 /* Return locked vnode to root of a filesystem */ 280 static int 281 nwfs_root(struct mount *mp, int flags, struct vnode **vpp) { 282 struct vnode *vp; 283 struct nwmount *nmp; 284 struct nwnode *np; 285 struct ncp_conn *conn; 286 struct nw_entry_info fattr; 287 struct thread *td; 288 struct ucred *cred; 289 int error, nsf, opt; 290 u_char vol; 291 292 td = curthread; 293 cred = td->td_ucred; 294 295 nmp = VFSTONWFS(mp); 296 conn = NWFSTOCONN(nmp); 297 if (nmp->n_root) { 298 *vpp = NWTOV(nmp->n_root); 299 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0) 300 ; 301 return 0; 302 } 303 error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 304 &nmp->n_rootent.f_id, td, cred); 305 if (error) 306 return ENOENT; 307 nmp->n_volume = vol; 308 error = ncp_get_namespaces(conn, vol, &nsf, td, cred); 309 if (error) 310 return ENOENT; 311 if (nsf & NW_NSB_OS2) { 312 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol); 313 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) { 314 nmp->name_space = NW_NS_OS2; 315 nmp->m.nls.opt &= ~NWHP_DOS; 316 } 317 } 318 opt = nmp->m.nls.opt; 319 nsf = opt & (NWHP_UPPER | NWHP_LOWER); 320 if (opt & NWHP_DOS) { 321 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 322 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 323 } else if (nsf == 0) { 324 nmp->m.nls.opt |= NWHP_LOWER; 325 } 326 } else { 327 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 328 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 329 } 330 } 331 if (nmp->m.root_path[0]) { 332 nmp->m.root_path[0]--; 333 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 334 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 335 if (error) { 336 NCPFATAL("Invalid root path specified\n"); 337 return ENOENT; 338 } 339 nmp->n_rootent.f_parent = fattr.dirEntNum; 340 nmp->m.root_path[0]++; 341 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 342 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 343 if (error) { 344 NCPFATAL("Invalid root path specified\n"); 345 return ENOENT; 346 } 347 nmp->n_rootent.f_id = fattr.dirEntNum; 348 } else { 349 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 350 0, NULL, &fattr, td, cred); 351 if (error) { 352 NCPFATAL("Can't obtain volume info\n"); 353 return ENOENT; 354 } 355 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT")); 356 nmp->n_rootent.f_parent = nmp->n_rootent.f_id; 357 } 358 error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp); 359 if (error) 360 return (error); 361 vp->v_vflag |= VV_ROOT; 362 np = VTONW(vp); 363 if (nmp->m.root_path[0] == 0) 364 np->n_flag |= NVOLUME; 365 nmp->n_root = np; 366 /* error = VOP_GETATTR(vp, &vattr, cred, td); 367 if (error) { 368 vput(vp); 369 NCPFATAL("Can't get root directory entry\n"); 370 return error; 371 }*/ 372 *vpp = vp; 373 return (0); 374 } 375 376 /* 377 * Do operations associated with quotas, not supported 378 */ 379 /* ARGSUSED */ 380 static int 381 nwfs_quotactl(mp, cmd, uid, arg) 382 struct mount *mp; 383 int cmd; 384 uid_t uid; 385 void *arg; 386 { 387 NCPVODEBUG("return EOPNOTSUPP\n"); 388 return (EOPNOTSUPP); 389 } 390 391 /*ARGSUSED*/ 392 int 393 nwfs_init(struct vfsconf *vfsp) 394 { 395 nwfs_hash_init(); 396 nwfs_pbuf_freecnt = nswbuf / 2 + 1; 397 NCPVODEBUG("always happy to load!\n"); 398 return (0); 399 } 400 401 /*ARGSUSED*/ 402 int 403 nwfs_uninit(struct vfsconf *vfsp) 404 { 405 406 nwfs_hash_free(); 407 NCPVODEBUG("unloaded\n"); 408 return (0); 409 } 410 411 /* 412 * nwfs_statfs call 413 */ 414 int 415 nwfs_statfs(mp, sbp) 416 struct mount *mp; 417 struct statfs *sbp; 418 { 419 struct nwmount *nmp = VFSTONWFS(mp); 420 struct thread *td = curthread; 421 int error = 0, secsize; 422 struct nwnode *np = nmp->n_root; 423 struct ncp_volume_info vi; 424 425 if (np == NULL) return EINVAL; 426 error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp), 427 nmp->n_volume, &vi, td, td->td_ucred); 428 if (error) return error; 429 secsize = 512; /* XXX how to get real value ??? */ 430 /* fundamental filesystem block size */ 431 sbp->f_bsize = vi.sectors_per_block*secsize; 432 /* optimal transfer block size */ 433 sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size; 434 /* total data blocks in filesystem */ 435 sbp->f_blocks= vi.total_blocks; 436 /* free blocks in fs */ 437 sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks; 438 /* free blocks avail to non-superuser */ 439 sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks; 440 /* total file nodes in filesystem */ 441 sbp->f_files = vi.total_dir_entries; 442 /* free file nodes in fs */ 443 sbp->f_ffree = vi.available_dir_entries; 444 sbp->f_flags = 0; /* copy of mount exported flags */ 445 return 0; 446 }
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