2 * Copyright (c) 1997-1999 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgment:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * $Id: mntfs.c,v 1.2 1999/01/10 21:53:47 ezk Exp $
47 #endif /* HAVE_CONFIG_H */
51 qelem mfhead = {&mfhead, &mfhead};
59 if (mf->mf_refc == 0) {
61 untimeout(mf->mf_cid);
71 init_mntfs(mntfs *mf, am_ops *ops, am_opts *mo, char *mp, char *info, char *auto_opts, char *mopts, char *remopts)
75 mf->mf_mount = strdup(mp);
76 mf->mf_info = strdup(info);
77 mf->mf_auto = strdup(auto_opts);
78 mf->mf_mopts = strdup(mopts);
79 mf->mf_remopts = strdup(remopts);
88 mf->mf_server = (*ops->ffserver) (mf);
95 alloc_mntfs(am_ops *ops, am_opts *mo, char *mp, char *info, char *auto_opts, char *mopts, char *remopts)
97 mntfs *mf = ALLOC(struct mntfs);
99 init_mntfs(mf, ops, mo, mp, info, auto_opts, mopts, remopts);
100 ins_que(&mf->mf_q, &mfhead);
108 find_mntfs(am_ops *ops, am_opts *mo, char *mp, char *info, char *auto_opts, char *mopts, char *remopts)
113 dlog("Locating mntfs reference to %s", mp);
116 ITER(mf, mntfs, &mfhead) {
117 if (STREQ(mf->mf_mount, mp)) {
119 * Handle cases where error ops are involved
121 if (ops == &amfs_error_ops) {
123 * If the existing ops are not amfs_error_ops
126 if (mf->mf_ops != &amfs_error_ops)
129 return dup_mntfs(mf);
130 } else { /* ops != &amfs_error_ops */
132 * If the existing ops are amfs_error_ops
135 if (mf->mf_ops == &amfs_error_ops)
139 if ((mf->mf_flags & MFF_RESTART) && amd_state == Run) {
141 * Restart a previously mounted filesystem.
143 mntfs *mf2 = alloc_mntfs(&amfs_inherit_ops, mo, mp, info, auto_opts, mopts, remopts);
145 dlog("Restarting filesystem %s", mf->mf_mount);
149 * Remember who we are restarting
151 mf2->mf_private = (voidp) dup_mntfs(mf);
152 mf2->mf_prfree = free_mntfs;
157 if (!(mf->mf_flags & (MFF_MOUNTED | MFF_MOUNTING | MFF_UNMOUNTING))) {
159 mf->mf_flags &= ~MFF_ERROR;
161 mf->mf_auto = strealloc(mf->mf_auto, auto_opts);
162 mf->mf_mopts = strealloc(mf->mf_mopts, mopts);
163 mf->mf_remopts = strealloc(mf->mf_remopts, remopts);
164 mf->mf_info = strealloc(mf->mf_info, info);
166 if (mf->mf_private && mf->mf_prfree) {
167 (*mf->mf_prfree) (mf->mf_private);
171 fs = ops->ffserver ? (*ops->ffserver) (mf) : (fserver *) NULL;
173 free_srvr(mf->mf_server);
176 return dup_mntfs(mf);
180 return alloc_mntfs(ops, mo, mp, info, auto_opts, mopts, remopts);
187 return alloc_mntfs(&amfs_error_ops, (am_opts *) 0, "//nil//", ".", "", "", "");
192 uninit_mntfs(mntfs *mf, int rmd)
199 XFREE(mf->mf_remopts);
202 if (mf->mf_private && mf->mf_prfree)
203 (*mf->mf_prfree) (mf->mf_private);
206 * Clean up any directories that were made
208 if (rmd && (mf->mf_flags & MFF_MKMNT))
209 rmdirs(mf->mf_mount);
210 /* free mf_mount _AFTER_ removing the directories */
215 * Clean up the file server
218 free_srvr(mf->mf_server);
221 * Don't do a callback on this mount
224 untimeout(mf->mf_cid);
231 discard_mntfs(voidp v)
240 uninit_mntfs(mf, TRUE);
252 mf = AM_FIRST(mntfs, &mfhead);
253 while (mf != HEAD(mntfs, &mfhead)) {
255 mf = NEXT(mntfs, mf);
256 if (mf2->mf_refc == 0 && mf2->mf_cid)
267 if (--mf->mf_refc == 0) {
268 if (mf->mf_flags & MFF_MOUNTED) {
270 mf->mf_flags &= ~MFF_MOUNTED;
273 * Record for posterity
275 quoted = strchr(mf->mf_info, ' ') != 0; /* cheap */
276 plog(XLOG_INFO, "%s%s%s %sed fstype %s from %s",
280 mf->mf_error ? "discard" : "unmount",
281 mf->mf_ops->fs_type, mf->mf_mount);
284 if (mf->mf_ops->fs_flags & FS_DISCARD) {
286 dlog("Immediately discarding mntfs for %s", mf->mf_mount);
293 if (mf->mf_flags & MFF_RESTART) {
294 dlog("Discarding remount hook for %s", mf->mf_mount);
296 dlog("Discarding last mntfs reference to %s fstype %s",
297 mf->mf_mount, mf->mf_ops->fs_type);
299 if (mf->mf_flags & (MFF_MOUNTED | MFF_MOUNTING | MFF_UNMOUNTING))
300 dlog("mntfs reference for %s still active", mf->mf_mount);
302 mf->mf_cid = timeout(ALLOWED_MOUNT_TIME, discard_mntfs, (voidp) mf);
309 realloc_mntfs(mntfs *mf, am_ops *ops, am_opts *mo, char *mp, char *info, char *auto_opts, char *mopts, char *remopts)
313 if (mf->mf_refc == 1 && mf->mf_ops == &amfs_inherit_ops && STREQ(mf->mf_mount, mp)) {
315 * If we are inheriting then just return
322 * Re-use the existing mntfs if it is mounted.
323 * This traps a race in nfsx.
325 if (mf->mf_ops != &amfs_error_ops &&
326 (mf->mf_flags & MFF_MOUNTED) &&
327 !FSRV_ISDOWN(mf->mf_server)) {
332 mf2 = find_mntfs(ops, mo, mp, info, auto_opts, mopts, remopts);