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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: releng/9.0/sys/fs/nwfs/nwfs_vfsops.c 213363 2010-10-02 17:58:57Z alc $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/proc.h> 32 #include <sys/kernel.h> 33 #include <sys/sysctl.h> 34 #include <sys/vnode.h> 35 #include <sys/mount.h> 36 #include <sys/stat.h> 37 #include <sys/malloc.h> 38 #include <sys/bio.h> 39 #include <sys/buf.h> 40 41 #include <netncp/ncp.h> 42 #include <netncp/ncp_conn.h> 43 #include <netncp/ncp_subr.h> 44 #include <netncp/ncp_ncp.h> 45 #include <netncp/ncp_nls.h> 46 47 #include <fs/nwfs/nwfs.h> 48 #include <fs/nwfs/nwfs_node.h> 49 #include <fs/nwfs/nwfs_subr.h> 50 51 int nwfs_debuglevel = 0; 52 53 static int nwfs_version = NWFS_VERSION; 54 55 SYSCTL_DECL(_vfs_nwfs); 56 SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware filesystem"); 57 SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, ""); 58 SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, ""); 59 60 MODULE_DEPEND(nwfs, ncp, 1, 1, 1); 61 MODULE_DEPEND(nwfs, libmchain, 1, 1, 1); 62 63 static vfs_cmount_t nwfs_cmount; 64 static vfs_mount_t nwfs_mount; 65 static vfs_quotactl_t nwfs_quotactl; 66 static vfs_root_t nwfs_root; 67 static vfs_statfs_t nwfs_statfs; 68 static vfs_unmount_t nwfs_unmount; 69 static vfs_init_t nwfs_init; 70 static vfs_uninit_t nwfs_uninit; 71 72 static struct vfsops nwfs_vfsops = { 73 .vfs_init = nwfs_init, 74 .vfs_mount = nwfs_mount, 75 .vfs_cmount = nwfs_cmount, 76 .vfs_quotactl = nwfs_quotactl, 77 .vfs_root = nwfs_root, 78 .vfs_statfs = nwfs_statfs, 79 .vfs_sync = vfs_stdsync, 80 .vfs_uninit = nwfs_uninit, 81 .vfs_unmount = nwfs_unmount, 82 }; 83 84 85 VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK); 86 87 int nwfs_pbuf_freecnt = -1; /* start out unlimited */ 88 static int nwfsid = 1; 89 90 static int 91 nwfs_initnls(struct nwmount *nmp) { 92 char *pc, *pe; 93 int error = 0; 94 #define COPY_TABLE(t,d) { \ 95 if (t) { \ 96 error = copyin((t), pc, 256); \ 97 if (error) break; \ 98 } else \ 99 bcopy(d, pc, 256); \ 100 (t) = pc; pc += 256; \ 101 } 102 103 nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS; 104 if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) { 105 nmp->m.nls.to_lower = ncp_defnls.to_lower; 106 nmp->m.nls.to_upper = ncp_defnls.to_upper; 107 nmp->m.nls.n2u = ncp_defnls.n2u; 108 nmp->m.nls.u2n = ncp_defnls.u2n; 109 return 0; 110 } 111 pe = malloc(256 * 4, M_NWFSDATA, M_WAITOK); 112 pc = pe; 113 do { 114 COPY_TABLE(nmp->m.nls.to_lower, ncp_defnls.to_lower); 115 COPY_TABLE(nmp->m.nls.to_upper, ncp_defnls.to_upper); 116 COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u); 117 COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n); 118 } while(0); 119 if (error) { 120 free(pe, M_NWFSDATA); 121 return error; 122 } 123 return 0; 124 } 125 126 static int nwfs_cmount(struct mntarg *ma, void *data, int flags) 127 { 128 struct nwfs_args args; /* will hold data from mount request */ 129 int error; 130 131 error = copyin(data, &args, sizeof(struct nwfs_args)); 132 if (error) 133 return (error); 134 135 /* 136 * XXX: cheap cop-out here, args contains a structure I don't 137 * XXX: know how we should handle, and I don't see any immediate 138 * XXX: prospect of avoiding a mount_nwfs(8) binary anyway. 139 */ 140 ma = mount_arg(ma, "nwfs_args", &args, sizeof args); 141 142 error = kernel_mount(ma, flags); 143 144 return (error); 145 } 146 147 /* 148 * mp - path - addr in user space of mount point (ie /usr or whatever) 149 * data - addr in user space of mount params 150 */ 151 static int nwfs_mount(struct mount *mp) 152 { 153 struct nwfs_args args; /* will hold data from mount request */ 154 int error; 155 struct nwmount *nmp = NULL; 156 struct ncp_conn *conn = NULL; 157 struct ncp_handle *handle = NULL; 158 struct vnode *vp; 159 struct thread *td; 160 char *pc,*pe; 161 162 td = curthread; 163 if (mp->mnt_flag & MNT_ROOTFS) 164 return (EOPNOTSUPP); 165 if (mp->mnt_flag & MNT_UPDATE) { 166 nwfs_printf("MNT_UPDATE not implemented"); 167 return (EOPNOTSUPP); 168 } 169 error = vfs_copyopt(mp->mnt_optnew, "nwfs_args", &args, sizeof args); 170 if (error) 171 return (error); 172 if (args.version != NWFS_VERSION) { 173 nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version); 174 return (1); 175 } 176 error = ncp_conn_getbyref(args.connRef, td , td->td_ucred,NCPM_EXECUTE,&conn); 177 if (error) { 178 nwfs_printf("invalid connection refernce %d\n",args.connRef); 179 return (error); 180 } 181 error = ncp_conn_gethandle(conn, NULL, &handle); 182 if (error) { 183 nwfs_printf("can't get connection handle\n"); 184 return (error); 185 } 186 ncp_conn_unlock(conn, td); /* we keep the ref */ 187 mp->mnt_stat.f_iosize = conn->buffer_size; 188 /* We must malloc our own mount info */ 189 nmp = malloc(sizeof(struct nwmount), M_NWFSDATA, M_WAITOK | M_ZERO); 190 if (nmp == NULL) { 191 nwfs_printf("could not alloc nwmount\n"); 192 error = ENOMEM; 193 goto bad; 194 } 195 mp->mnt_data = nmp; 196 nmp->connh = handle; 197 nmp->n_root = NULL; 198 nmp->n_id = nwfsid++; 199 nmp->m = args; 200 nmp->m.file_mode = (nmp->m.file_mode & 201 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; 202 nmp->m.dir_mode = (nmp->m.dir_mode & 203 (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; 204 if ((error = nwfs_initnls(nmp)) != 0) goto bad; 205 pc = mp->mnt_stat.f_mntfromname; 206 pe = pc+sizeof(mp->mnt_stat.f_mntfromname); 207 bzero(pc, MNAMELEN); 208 *(pc++) = '/'; 209 pc = index(strncpy(pc, conn->li.server, pe-pc-2),0); 210 if (pc < pe-1) { 211 *(pc++) = ':'; 212 pc=index(strncpy(pc, conn->li.user, pe-pc-2),0); 213 if (pc < pe-1) { 214 *(pc++) = '/'; 215 strncpy(pc, nmp->m.mounted_vol, pe-pc-2); 216 } 217 } 218 /* protect against invalid mount points */ 219 nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0'; 220 vfs_getnewfsid(mp); 221 error = nwfs_root(mp, LK_EXCLUSIVE, &vp); 222 if (error) 223 goto bad; 224 /* 225 * Lose the lock but keep the ref. 226 */ 227 VOP_UNLOCK(vp, 0); 228 NCPVODEBUG("rootvp.vrefcnt=%d\n",vrefcnt(vp)); 229 return error; 230 bad: 231 if (nmp) 232 free(nmp, M_NWFSDATA); 233 if (handle) 234 ncp_conn_puthandle(handle, NULL, 0); 235 return error; 236 } 237 238 /* Unmount the filesystem described by mp. */ 239 static int 240 nwfs_unmount(struct mount *mp, int mntflags) 241 { 242 struct thread *td; 243 struct nwmount *nmp = VFSTONWFS(mp); 244 struct ncp_conn *conn; 245 int error, flags; 246 247 NCPVODEBUG("nwfs_unmount: flags=%04x\n",mntflags); 248 td = curthread; 249 flags = 0; 250 if (mntflags & MNT_FORCE) 251 flags |= FORCECLOSE; 252 /* There is 1 extra root vnode reference from nwfs_mount(). */ 253 error = vflush(mp, 1, flags, td); 254 if (error) 255 return (error); 256 conn = NWFSTOCONN(nmp); 257 ncp_conn_puthandle(nmp->connh,NULL,0); 258 if (ncp_conn_lock(conn, td, td->td_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) { 259 if(ncp_conn_free(conn)) 260 ncp_conn_unlock(conn, td); 261 } 262 mp->mnt_data = NULL; 263 if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS) 264 free(nmp->m.nls.to_lower, M_NWFSDATA); 265 free(nmp, M_NWFSDATA); 266 MNT_ILOCK(mp); 267 mp->mnt_flag &= ~MNT_LOCAL; 268 MNT_IUNLOCK(mp); 269 return (error); 270 } 271 272 /* Return locked vnode to root of a filesystem */ 273 static int 274 nwfs_root(struct mount *mp, int flags, struct vnode **vpp) { 275 struct vnode *vp; 276 struct nwmount *nmp; 277 struct nwnode *np; 278 struct ncp_conn *conn; 279 struct nw_entry_info fattr; 280 struct thread *td; 281 struct ucred *cred; 282 int error, nsf, opt; 283 u_char vol; 284 285 td = curthread; 286 cred = td->td_ucred; 287 288 nmp = VFSTONWFS(mp); 289 conn = NWFSTOCONN(nmp); 290 if (nmp->n_root) { 291 *vpp = NWTOV(nmp->n_root); 292 while (vget(*vpp, LK_EXCLUSIVE, curthread) != 0) 293 ; 294 return 0; 295 } 296 error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 297 &nmp->n_rootent.f_id, td, cred); 298 if (error) 299 return ENOENT; 300 nmp->n_volume = vol; 301 error = ncp_get_namespaces(conn, vol, &nsf, td, cred); 302 if (error) 303 return ENOENT; 304 if (nsf & NW_NSB_OS2) { 305 NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol); 306 if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) { 307 nmp->name_space = NW_NS_OS2; 308 nmp->m.nls.opt &= ~NWHP_DOS; 309 } 310 } 311 opt = nmp->m.nls.opt; 312 nsf = opt & (NWHP_UPPER | NWHP_LOWER); 313 if (opt & NWHP_DOS) { 314 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 315 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 316 } else if (nsf == 0) { 317 nmp->m.nls.opt |= NWHP_LOWER; 318 } 319 } else { 320 if (nsf == (NWHP_UPPER | NWHP_LOWER)) { 321 nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER); 322 } 323 } 324 if (nmp->m.root_path[0]) { 325 nmp->m.root_path[0]--; 326 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 327 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 328 if (error) { 329 NCPFATAL("Invalid root path specified\n"); 330 return ENOENT; 331 } 332 nmp->n_rootent.f_parent = fattr.dirEntNum; 333 nmp->m.root_path[0]++; 334 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 335 -nmp->m.root_path[0], nmp->m.root_path, &fattr, td, cred); 336 if (error) { 337 NCPFATAL("Invalid root path specified\n"); 338 return ENOENT; 339 } 340 nmp->n_rootent.f_id = fattr.dirEntNum; 341 } else { 342 error = ncp_obtain_info(nmp, nmp->n_rootent.f_id, 343 0, NULL, &fattr, td, cred); 344 if (error) { 345 NCPFATAL("Can't obtain volume info\n"); 346 return ENOENT; 347 } 348 fattr.nameLen = strlen(strcpy(fattr.entryName, "#.ROOT")); 349 nmp->n_rootent.f_parent = nmp->n_rootent.f_id; 350 } 351 error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp); 352 if (error) 353 return (error); 354 vp->v_vflag |= VV_ROOT; 355 np = VTONW(vp); 356 if (nmp->m.root_path[0] == 0) 357 np->n_flag |= NVOLUME; 358 nmp->n_root = np; 359 /* error = VOP_GETATTR(vp, &vattr, cred, td); 360 if (error) { 361 vput(vp); 362 NCPFATAL("Can't get root directory entry\n"); 363 return error; 364 }*/ 365 *vpp = vp; 366 return (0); 367 } 368 369 /* 370 * Do operations associated with quotas, not supported 371 */ 372 /* ARGSUSED */ 373 static int 374 nwfs_quotactl(mp, cmd, uid, arg) 375 struct mount *mp; 376 int cmd; 377 uid_t uid; 378 void *arg; 379 { 380 NCPVODEBUG("return EOPNOTSUPP\n"); 381 return (EOPNOTSUPP); 382 } 383 384 /*ARGSUSED*/ 385 int 386 nwfs_init(struct vfsconf *vfsp) 387 { 388 nwfs_hash_init(); 389 nwfs_pbuf_freecnt = nswbuf / 2 + 1; 390 NCPVODEBUG("always happy to load!\n"); 391 return (0); 392 } 393 394 /*ARGSUSED*/ 395 int 396 nwfs_uninit(struct vfsconf *vfsp) 397 { 398 399 nwfs_hash_free(); 400 NCPVODEBUG("unloaded\n"); 401 return (0); 402 } 403 404 /* 405 * nwfs_statfs call 406 */ 407 int 408 nwfs_statfs(mp, sbp) 409 struct mount *mp; 410 struct statfs *sbp; 411 { 412 struct nwmount *nmp = VFSTONWFS(mp); 413 struct thread *td = curthread; 414 int error = 0, secsize; 415 struct nwnode *np = nmp->n_root; 416 struct ncp_volume_info vi; 417 418 if (np == NULL) return EINVAL; 419 error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp), 420 nmp->n_volume, &vi, td, td->td_ucred); 421 if (error) return error; 422 secsize = 512; /* XXX how to get real value ??? */ 423 /* fundamental filesystem block size */ 424 sbp->f_bsize = vi.sectors_per_block*secsize; 425 /* optimal transfer block size */ 426 sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size; 427 /* total data blocks in filesystem */ 428 sbp->f_blocks= vi.total_blocks; 429 /* free blocks in fs */ 430 sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks; 431 /* free blocks avail to non-superuser */ 432 sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks; 433 /* total file nodes in filesystem */ 434 sbp->f_files = vi.total_dir_entries; 435 /* free file nodes in fs */ 436 sbp->f_ffree = vi.available_dir_entries; 437 sbp->f_flags = 0; /* copy of mount exported flags */ 438 return 0; 439 }
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