vfs_export.c (986f4ce75ecfc9a4b7e3bdfe993bb2f35a0fa7de) vfs_export.c (4b2af45f4ba1f8d8d5a56c4b18f29da6d08146e9)
1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94
1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94
39 * $Id: vfs_subr.c,v 1.41 1995/11/14 09:19:12 phk Exp $
39 * $Id: vfs_subr.c,v 1.42 1995/11/16 09:45:23 bde Exp $
40 */
41
42/*
43 * External virtual filesystem routines
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>

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170 mp->mnt_flag &= ~MNT_MPBUSY;
171 if (mp->mnt_flag & MNT_MPWANT) {
172 mp->mnt_flag &= ~MNT_MPWANT;
173 wakeup((caddr_t) &mp->mnt_flag);
174 }
175}
176
177void
40 */
41
42/*
43 * External virtual filesystem routines
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>

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170 mp->mnt_flag &= ~MNT_MPBUSY;
171 if (mp->mnt_flag & MNT_MPWANT) {
172 mp->mnt_flag &= ~MNT_MPWANT;
173 wakeup((caddr_t) &mp->mnt_flag);
174 }
175}
176
177void
178vfs_unmountroot(rootfs)
179 struct mount *rootfs;
178vfs_unmountroot(struct mount *rootfs)
180{
181 struct mount *mp = rootfs;
182 int error;
183
184 if (vfs_busy(mp)) {
185 printf("failed to unmount root\n");
186 return;
187 }

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948 return (EBUSY);
949 return (0);
950}
951
952/*
953 * Disassociate the underlying file system from a vnode.
954 */
955void
179{
180 struct mount *mp = rootfs;
181 int error;
182
183 if (vfs_busy(mp)) {
184 printf("failed to unmount root\n");
185 return;
186 }

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947 return (EBUSY);
948 return (0);
949}
950
951/*
952 * Disassociate the underlying file system from a vnode.
953 */
954void
956vclean(vp, flags)
957 register struct vnode *vp;
958 int flags;
955vclean(struct vnode *vp, int flags)
959{
960 int active;
961
962 /*
963 * Check to see if the vnode is in use. If so we have to reference it
964 * before we clean it out so that its count cannot fall to zero and
965 * generate a race against ourselves to recycle it.
966 */

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1242}
1243
1244#ifdef DDB
1245/*
1246 * List all of the locked vnodes in the system.
1247 * Called when debugging the kernel.
1248 */
1249void
956{
957 int active;
958
959 /*
960 * Check to see if the vnode is in use. If so we have to reference it
961 * before we clean it out so that its count cannot fall to zero and
962 * generate a race against ourselves to recycle it.
963 */

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1239}
1240
1241#ifdef DDB
1242/*
1243 * List all of the locked vnodes in the system.
1244 * Called when debugging the kernel.
1245 */
1246void
1250printlockedvnodes()
1247printlockedvnodes(void)
1251{
1252 register struct mount *mp;
1253 register struct vnode *vp;
1254
1255 printf("Locked vnodes\n");
1256 for (mp = mountlist.cqh_first; mp != (void *)&mountlist;
1257 mp = mp->mnt_list.cqe_next) {
1258 for (vp = mp->mnt_vnodelist.lh_first;

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1268int kinfo_vgetfailed;
1269
1270#define KINFO_VNODESLOP 10
1271/*
1272 * Dump vnode list (via sysctl).
1273 * Copyout address of vnode followed by vnode.
1274 */
1275/* ARGSUSED */
1248{
1249 register struct mount *mp;
1250 register struct vnode *vp;
1251
1252 printf("Locked vnodes\n");
1253 for (mp = mountlist.cqh_first; mp != (void *)&mountlist;
1254 mp = mp->mnt_list.cqe_next) {
1255 for (vp = mp->mnt_vnodelist.lh_first;

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1265int kinfo_vgetfailed;
1266
1267#define KINFO_VNODESLOP 10
1268/*
1269 * Dump vnode list (via sysctl).
1270 * Copyout address of vnode followed by vnode.
1271 */
1272/* ARGSUSED */
1276int
1277sysctl_vnode(where, sizep)
1278 char *where;
1279 size_t *sizep;
1273static int
1274sysctl_vnode SYSCTL_HANDLER_ARGS
1280{
1281 register struct mount *mp, *nmp;
1282 struct vnode *vp;
1275{
1276 register struct mount *mp, *nmp;
1277 struct vnode *vp;
1283 register char *bp = where, *savebp;
1284 char *ewhere;
1285 int error;
1286
1287#define VPTRSZ sizeof (struct vnode *)
1288#define VNODESZ sizeof (struct vnode)
1278 int error;
1279
1280#define VPTRSZ sizeof (struct vnode *)
1281#define VNODESZ sizeof (struct vnode)
1289 if (where == NULL) {
1290 *sizep = (numvnodes + KINFO_VNODESLOP) * (VPTRSZ + VNODESZ);
1291 return (0);
1292 }
1293 ewhere = where + *sizep;
1294
1282
1283 req->lock = 0;
1284 if (req->oldptr) /* Make an estimate */
1285 return (SYSCTL_OUT(req, 0,
1286 (numvnodes + KINFO_VNODESLOP) * (VPTRSZ + VNODESZ)));
1287
1295 for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
1296 nmp = mp->mnt_list.cqe_next;
1297 if (vfs_busy(mp))
1298 continue;
1288 for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
1289 nmp = mp->mnt_list.cqe_next;
1290 if (vfs_busy(mp))
1291 continue;
1299 savebp = bp;
1300again:
1301 for (vp = mp->mnt_vnodelist.lh_first;
1302 vp != NULL;
1303 vp = vp->v_mntvnodes.le_next) {
1304 /*
1305 * Check that the vp is still associated with this
1306 * filesystem. RACE: could have been recycled onto
1307 * the same filesystem.
1308 */
1309 if (vp->v_mount != mp) {
1310 if (kinfo_vdebug)
1311 printf("kinfo: vp changed\n");
1292again:
1293 for (vp = mp->mnt_vnodelist.lh_first;
1294 vp != NULL;
1295 vp = vp->v_mntvnodes.le_next) {
1296 /*
1297 * Check that the vp is still associated with this
1298 * filesystem. RACE: could have been recycled onto
1299 * the same filesystem.
1300 */
1301 if (vp->v_mount != mp) {
1302 if (kinfo_vdebug)
1303 printf("kinfo: vp changed\n");
1312 bp = savebp;
1313 goto again;
1314 }
1304 goto again;
1305 }
1315 if (bp + VPTRSZ + VNODESZ > ewhere) {
1306 if ((error = SYSCTL_OUT(req, &vp, VPTRSZ)) ||
1307 (error = SYSCTL_OUT(req, vp, VNODESZ))) {
1316 vfs_unbusy(mp);
1308 vfs_unbusy(mp);
1317 *sizep = bp - where;
1318 return (ENOMEM);
1319 }
1320 if ((error = copyout(&vp, bp, VPTRSZ)) ||
1321 (error = copyout(vp, bp + VPTRSZ, VNODESZ))) {
1322 vfs_unbusy(mp);
1323 *sizep = bp - where;
1324 return (error);
1325 }
1309 return (error);
1310 }
1326 bp += VPTRSZ + VNODESZ;
1327 }
1328 vfs_unbusy(mp);
1329 }
1330
1311 }
1312 vfs_unbusy(mp);
1313 }
1314
1331 *sizep = bp - where;
1332 return (0);
1333}
1334
1315 return (0);
1316}
1317
1318SYSCTL_NODE(_kern, KERN_VNODE, vnode, CTLTYPE_OPAQUE|CTLFLAG_RD,
1319 sysctl_vnode, "");
1320
1321
1335/*
1336 * Check to see if a filesystem is mounted on a block device.
1337 */
1338int
1339vfs_mountedon(vp)
1340 register struct vnode *vp;
1341{
1342 register struct vnode *vq;

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1355 return (0);
1356}
1357
1358/*
1359 * Build hash lists of net addresses and hang them off the mount point.
1360 * Called by ufs_mount() to set up the lists of export addresses.
1361 */
1362static int
1322/*
1323 * Check to see if a filesystem is mounted on a block device.
1324 */
1325int
1326vfs_mountedon(vp)
1327 register struct vnode *vp;
1328{
1329 register struct vnode *vq;

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1342 return (0);
1343}
1344
1345/*
1346 * Build hash lists of net addresses and hang them off the mount point.
1347 * Called by ufs_mount() to set up the lists of export addresses.
1348 */
1349static int
1363vfs_hang_addrlist(mp, nep, argp)
1364 struct mount *mp;
1365 struct netexport *nep;
1366 struct export_args *argp;
1350vfs_hang_addrlist(struct mount *mp, struct netexport *nep,
1351 struct export_args *argp)
1367{
1368 register struct netcred *np;
1369 register struct radix_node_head *rnh;
1370 register int i;
1371 struct radix_node *rn;
1372 struct sockaddr *saddr, *smask = 0;
1373 struct domain *dom;
1374 int error;

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1428 return (0);
1429out:
1430 free(np, M_NETADDR);
1431 return (error);
1432}
1433
1434/* ARGSUSED */
1435static int
1352{
1353 register struct netcred *np;
1354 register struct radix_node_head *rnh;
1355 register int i;
1356 struct radix_node *rn;
1357 struct sockaddr *saddr, *smask = 0;
1358 struct domain *dom;
1359 int error;

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1413 return (0);
1414out:
1415 free(np, M_NETADDR);
1416 return (error);
1417}
1418
1419/* ARGSUSED */
1420static int
1436vfs_free_netcred(rn, w)
1437 struct radix_node *rn;
1438 void *w;
1421vfs_free_netcred(struct radix_node *rn, void *w)
1439{
1440 register struct radix_node_head *rnh = (struct radix_node_head *) w;
1441
1442 (*rnh->rnh_deladdr) (rn->rn_key, rn->rn_mask, rnh);
1443 free((caddr_t) rn, M_NETADDR);
1444 return (0);
1445}
1446
1447/*
1448 * Free the net address hash lists that are hanging off the mount points.
1449 */
1450static void
1422{
1423 register struct radix_node_head *rnh = (struct radix_node_head *) w;
1424
1425 (*rnh->rnh_deladdr) (rn->rn_key, rn->rn_mask, rnh);
1426 free((caddr_t) rn, M_NETADDR);
1427 return (0);
1428}
1429
1430/*
1431 * Free the net address hash lists that are hanging off the mount points.
1432 */
1433static void
1451vfs_free_addrlist(nep)
1452 struct netexport *nep;
1434vfs_free_addrlist(struct netexport *nep)
1453{
1454 register int i;
1455 register struct radix_node_head *rnh;
1456
1457 for (i = 0; i <= AF_MAX; i++)
1458 if ((rnh = nep->ne_rtable[i])) {
1459 (*rnh->rnh_walktree) (rnh, vfs_free_netcred,
1460 (caddr_t) rnh);

--- 83 unchanged lines hidden --- 		1435{
1436 register int i;
1437 register struct radix_node_head *rnh;
1438
1439 for (i = 0; i <= AF_MAX; i++)
1440 if ((rnh = nep->ne_rtable[i])) {
1441 (*rnh->rnh_walktree) (rnh, vfs_free_netcred,
1442 (caddr_t) rnh);

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