2 * Copyright (c) 1997-2014 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. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * File: am-utils/amd/restart.c
42 #endif /* HAVE_CONFIG_H */
48 restart_fake_mntfs(mntent_t *me, am_ops *fs_ops)
55 * Partially fake up an opts structure
57 memset(&mo, 0, sizeof(mo));
60 cp = strchr(me->mnt_fsname, ':');
63 mo.opt_rhost = xstrdup(me->mnt_fsname);
64 mo.opt_rfs = xstrdup(cp + 1);
66 } else if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS)) {
68 * Hacky workaround for mnttab NFS entries that only list the server
70 plog(XLOG_WARNING, "NFS server entry assumed to be %s:/", me->mnt_fsname);
71 mo.opt_rhost = xstrdup(me->mnt_fsname);
72 mo.opt_rfs = xstrdup("/");
73 me->mnt_fsname = str3cat(me->mnt_fsname, mo.opt_rhost, ":", "/");
75 mo.opt_fs = me->mnt_dir;
76 mo.opt_opts = me->mnt_opts;
79 * Make a new mounted filesystem
81 mf = find_mntfs(fs_ops, &mo, me->mnt_dir,
82 me->mnt_fsname, "", me->mnt_opts, "");
83 if (mf->mf_refc == 1) {
84 mf->mf_flags |= MFF_RESTART | MFF_MOUNTED;
85 mf->mf_error = 0; /* Already mounted correctly */
87 * Only timeout non-NFS entries
89 if (!STREQ(me->mnt_type, MNTTAB_TYPE_NFS))
90 mf->mf_flags |= MFF_RSTKEEP;
91 if (fs_ops->fs_init) {
93 * Don't care whether this worked since
94 * it is checked again when the fs is
97 (void) (*fs_ops->fs_init) (mf);
99 plog(XLOG_INFO, "%s restarted fstype %s on %s, flags 0x%x",
100 me->mnt_fsname, fs_ops->fs_type, me->mnt_dir, mf->mf_flags);
102 /* Something strange happened - two mounts at the same place! */
114 * Handle an amd restart.
116 * Scan through the mount list finding all "interesting" mount points.
117 * Next hack up partial data structures and add the mounted file
118 * system to the list of known filesystems.
120 * This module relies on internal details of other components. If
121 * you change something else make *sure* restart() still works.
129 * Read the existing mount table. For each entry, find nfs, ufs or auto
130 * mounts and create a partial am_node to represent it.
132 for (mlp = ml = read_mtab("restart", mnttab_file_name);
135 mntent_t *me = mlp->mnt;
136 am_ops *fs_ops = NULL;
138 if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS)) {
140 * NFS entry, or possibly an Amd entry...
141 * The mnt_fsname for daemon mount points is
143 * or (seen on Solaris)
144 * host:daemon(pidXXX)
146 char *colon = strchr(me->mnt_fsname, ':');
147 if (colon && strstr(colon, "(pid"))
151 /* Search for the correct filesystem ops */
152 fs_ops = ops_search(me->mnt_type);
155 * Catch everything else with symlinks to
156 * avoid recursive mounts. This is debatable...
159 fs_ops = &amfs_link_ops;
161 restart_fake_mntfs(me, fs_ops);
165 * Free the mount list
172 * Handle an amd restart for amd's own mount points.
174 * Scan through the mount list finding all daemon mount points
175 * (determined by the presence of a pid inside the mount info).
176 * Next hack up partial data structures and add the mounted file
177 * system to the list of known filesystems.
179 * This module relies on internal details of other components. If
180 * you change something else make *sure* restart() still works.
183 restart_automounter_nodes(void)
186 /* reasonably sized list of restarted nfs ports */
187 u_short old_ports[256];
189 memset((voidp) &old_ports, 0, sizeof(u_short) * 256);
192 * Read the existing mount table. For each entry, find nfs, ufs or auto
193 * mounts and create a partial am_node to represent it.
195 for (mlp = ml = read_mtab("restart", mnttab_file_name);
198 mntent_t *me = mlp->mnt;
199 am_ops *fs_ops = NULL;
205 if (!STREQ(me->mnt_type, MNTTAB_TYPE_NFS))
206 continue; /* to next mlp */
208 * NFS entry, or possibly an Amd entry...
209 * The mnt_fsname for daemon mount points is
211 * or (seen on Solaris)
212 * host:daemon(pidXXX)
214 colon = strchr(me->mnt_fsname, ':');
215 if (!colon || !strstr(colon, "(pid"))
217 /* if got here, then we matched an existing Amd mount point */
220 plog(XLOG_WARNING, "%s is an existing automount point", me->mnt_dir);
222 /* Is the old automounter still alive? */
223 if (sscanf(colon, "%*[^(](pid%ld%*[,)]", &pid) != 1) {
224 plog(XLOG_WARNING, "Can't parse pid in %s", me->mnt_fsname);
227 if (kill(pid, 0) != -1 || errno != ESRCH) {
228 plog(XLOG_WARNING, "Automounter (pid: %ld) still alive", pid);
233 * Do we have a map for this mount point? Who cares, we'll restart
234 * anyway -- getting ESTALE is way better than hanging.
237 /* Can we restart it? Only if it tells us what port it was using... */
238 if (sscanf(colon, "%*[^,],port%hu)", &port) != 1) {
239 plog(XLOG_WARNING, "No port specified for %s", me->mnt_fsname);
243 /* Maybe we already own that port... */
244 if (port != nfs_port) {
246 for (i = 0; i < 256; i++) {
247 if (old_ports[i] == port ||
252 plog(XLOG_WARNING, "Too many open ports (256)");
256 if (old_ports[i] == 0) {
259 if (create_nfs_service(&soNFS, &port, &nfsxprt, nfs_dispatcher,
260 get_nfs_dispatcher_version(nfs_dispatcher)) != 0) {
261 plog(XLOG_WARNING, "Can't bind to port %u", port);
264 old_ports[i] = nfs_port = port;
271 plog(XLOG_WARNING, "Can't restart %s, leaving it alone", me->mnt_dir);
272 fs_ops = &amfs_link_ops;
274 fs_ops = &amfs_toplvl_ops;
277 restart_fake_mntfs(me, fs_ops);
278 } /* end of "for (mlp" */
280 /* free the mount list */