2 * Copyright (c) 1997-2006 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
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32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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40 * File: am-utils/amd/restart.c
46 #endif /* HAVE_CONFIG_H */
52 restart_fake_mntfs(mntent_t *me, am_ops *fs_ops)
59 * Partially fake up an opts structure
61 memset(&mo, 0, sizeof(mo));
64 cp = strchr(me->mnt_fsname, ':');
67 mo.opt_rhost = strdup(me->mnt_fsname);
68 mo.opt_rfs = strdup(cp + 1);
70 } else if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS)) {
72 * Hacky workaround for mnttab NFS entries that only list the server
74 plog(XLOG_WARNING, "NFS server entry assumed to be %s:/", me->mnt_fsname);
75 mo.opt_rhost = strdup(me->mnt_fsname);
76 mo.opt_rfs = strdup("/");
77 me->mnt_fsname = str3cat(me->mnt_fsname, mo.opt_rhost, ":", "/");
79 mo.opt_fs = me->mnt_dir;
80 mo.opt_opts = me->mnt_opts;
83 * Make a new mounted filesystem
85 mf = find_mntfs(fs_ops, &mo, me->mnt_dir,
86 me->mnt_fsname, "", me->mnt_opts, "");
87 if (mf->mf_refc == 1) {
88 mf->mf_flags |= MFF_RESTART | MFF_MOUNTED;
89 mf->mf_error = 0; /* Already mounted correctly */
92 * Only timeout non-NFS entries
94 if (!STREQ(me->mnt_type, MNTTAB_TYPE_NFS))
95 mf->mf_flags |= MFF_RSTKEEP;
96 if (fs_ops->fs_init) {
98 * Don't care whether this worked since
99 * it is checked again when the fs is
102 (void) (*fs_ops->fs_init) (mf);
104 plog(XLOG_INFO, "%s restarted fstype %s on %s, flags 0x%x",
105 me->mnt_fsname, fs_ops->fs_type, me->mnt_dir, mf->mf_flags);
107 /* Something strange happened - two mounts at the same place! */
121 * Handle an amd restart.
123 * Scan through the mount list finding all "interesting" mount points.
124 * Next hack up partial data structures and add the mounted file
125 * system to the list of known filesystems.
127 * This module relies on internal details of other components. If
128 * you change something else make *sure* restart() still works.
136 * Read the existing mount table. For each entry, find nfs, ufs or auto
137 * mounts and create a partial am_node to represent it.
139 for (mlp = ml = read_mtab("restart", mnttab_file_name);
142 mntent_t *me = mlp->mnt;
145 if (STREQ(me->mnt_type, MNTTAB_TYPE_NFS)) {
147 * NFS entry, or possibly an Amd entry...
148 * The mnt_fsname for daemon mount points is
150 * or (seen on Solaris)
151 * host:daemon(pidXXX)
153 char *colon = strchr(me->mnt_fsname, ':');
154 if (colon && strstr(colon, "(pid"))
158 /* Search for the correct filesystem ops */
159 fs_ops = ops_search(me->mnt_type);
162 * Catch everything else with symlinks to
163 * avoid recursive mounts. This is debatable...
166 fs_ops = &amfs_link_ops;
168 restart_fake_mntfs(me, fs_ops);
172 * Free the mount list
179 * Handle an amd restart for amd's own mount points.
181 * Scan through the mount list finding all daemon mount points
182 * (determined by the presence of a pid inside the mount info).
183 * Next hack up partial data structures and add the mounted file
184 * system to the list of known filesystems.
186 * This module relies on internal details of other components. If
187 * you change something else make *sure* restart() still works.
190 restart_automounter_nodes(void)
193 /* reasonably sized list of restarted nfs ports */
194 u_short old_ports[256];
196 memset((voidp) &old_ports, 0, sizeof(u_short) * 256);
199 * Read the existing mount table. For each entry, find nfs, ufs or auto
200 * mounts and create a partial am_node to represent it.
202 for (mlp = ml = read_mtab("restart", mnttab_file_name);
205 mntent_t *me = mlp->mnt;
212 if (!STREQ(me->mnt_type, MNTTAB_TYPE_NFS))
213 continue; /* to next mlp */
215 * NFS entry, or possibly an Amd entry...
216 * The mnt_fsname for daemon mount points is
218 * or (seen on Solaris)
219 * host:daemon(pidXXX)
221 colon = strchr(me->mnt_fsname, ':');
222 if (!colon || !strstr(colon, "(pid"))
224 /* if got here, then we matched an existing Amd mount point */
227 plog(XLOG_WARNING, "%s is an existing automount point", me->mnt_dir);
229 /* Is the old automounter still alive? */
230 if (sscanf(colon, "%*[^(](pid%ld%*[,)]", &pid) != 1) {
231 plog(XLOG_WARNING, "Can't parse pid in %s", me->mnt_fsname);
234 if (kill(pid, 0) != -1 || errno != ESRCH) {
235 plog(XLOG_WARNING, "Automounter (pid: %ld) still alive", pid);
240 * Do we have a map for this mount point? Who cares, we'll restart
241 * anyway -- getting ESTALE is way better than hanging.
244 /* Can we restart it? Only if it tells us what port it was using... */
245 if (sscanf(colon, "%*[^,],port%hu)", &port) != 1) {
246 plog(XLOG_WARNING, "No port specified for %s", me->mnt_fsname);
250 /* Maybe we already own that port... */
251 if (port != nfs_port) {
253 for (i = 0; i < 256; i++) {
254 if (old_ports[i] == port ||
259 plog(XLOG_WARNING, "Too many open ports (256)");
263 if (old_ports[i] == 0) {
266 if (create_nfs_service(&soNFS, &port, &nfsxprt, nfs_program_2) != 0) {
267 plog(XLOG_WARNING, "Can't bind to port %u", port);
270 old_ports[i] = nfs_port = port;
277 plog(XLOG_WARNING, "Can't restart %s, leaving it alone", me->mnt_dir);
278 fs_ops = &amfs_link_ops;
280 fs_ops = &amfs_toplvl_ops;
283 restart_fake_mntfs(me, fs_ops);
284 } /* end of "for (mlp" */
286 /* free the mount list */