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-rw-r--r--conf/umount/umount_aix.c197
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diff --git a/conf/umount/umount_aix.c b/conf/umount/umount_aix.c
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+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/umount/umount_aix.c
+ *
+ */
+
+/*
+ * AIX method of unmounting filesystems.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+
+int
+umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
+{
+ mntlist *mlist, *mp, *mp_save = NULL;
+ int error = 0;
+
+ mp = mlist = read_mtab(mntdir, mnttabname);
+
+ /*
+ * Search the mount table looking for
+ * the correct (ie last) matching entry
+ */
+ while (mp) {
+ if (STREQ(mp->mnt->mnt_dir, mntdir))
+ mp_save = mp;
+ mp = mp->mnext;
+ }
+
+ if (mp_save) {
+ dlog("Trying unmount(%s)", mp_save->mnt->mnt_dir);
+
+#ifdef MOUNT_TABLE_ON_FILE
+ /*
+ * This unmount may hang leaving this process with an exclusive lock on
+ * /etc/mtab. Therefore it is necessary to unlock mtab, do the unmount,
+ * then lock mtab (again) and reread it and finally update it.
+ */
+ unlock_mntlist();
+#endif /* MOUNT_TABLE_ON_FILE */
+
+#ifdef NEED_AUTOFS_SPACE_HACK
+ if (unmount_flags & AMU_UMOUNT_AUTOFS) {
+ char *mnt_dir_save = mp_save->mnt->mnt_dir;
+ mp_save->mnt->mnt_dir = autofs_strdup_space_hack(mnt_dir_save);
+ error = UNMOUNT_TRAP(mp_save->mnt);
+ XFREE(mp_save->mnt->mnt_dir);
+ mp_save->mnt->mnt_dir = mnt_dir_save;
+ } else
+#endif /* NEED_AUTOFS_SPACE_HACK */
+ error = UNMOUNT_TRAP(mp_save->mnt);
+ if (error < 0) {
+ switch ((error = errno)) {
+ case EINVAL:
+ case ENOTBLK:
+ plog(XLOG_WARNING, "unmount: %s is not mounted", mp_save->mnt->mnt_dir);
+ error = 0; /* Not really an error */
+ break;
+
+ case ENOENT:
+ /*
+ * This could happen if the kernel insists on following symlinks
+ * when we try to unmount a direct mountpoint. We need to propagate
+ * the error up so that the top layers know it failed and don't
+ * try to rmdir() the mountpoint or other silly things.
+ */
+ plog(XLOG_ERROR, "mount point %s: %m", mp_save->mnt->mnt_dir);
+ break;
+
+#if defined(MNT2_GEN_OPT_FORCE) && defined(HAVE_UVMOUNT)
+ case EBUSY:
+ case EIO:
+ case ESTALE:
+ /* caller determines if forced unmounts should be used */
+ if (unmount_flags & AMU_UMOUNT_FORCE) {
+ error = umount2_fs(mntdir, unmount_flags);
+ if (error < 0)
+ error = errno;
+ else
+ break; /* all is OK */
+ }
+ /* fallthrough */
+#endif /* MNT2_GEN_OPT_FORCE && HAVE_UVMOUNT */
+ default:
+ dlog("%s: unmount: %m", mp_save->mnt->mnt_dir);
+ break;
+ }
+ }
+ dlog("Finished unmount(%s)", mp_save->mnt->mnt_dir);
+
+ if (!error) {
+#ifdef MOUNT_TABLE_ON_FILE
+ free_mntlist(mlist);
+ mp = mlist = read_mtab(mntdir, mnttabname);
+
+ /*
+ * Search the mount table looking for
+ * the correct (ie last) matching entry
+ */
+ mp_save = NULL;
+ while (mp) {
+ if (STREQ(mp->mnt->mnt_dir, mntdir))
+ mp_save = mp;
+ mp = mp->mnext;
+ }
+
+ if (mp_save) {
+ mnt_free(mp_save->mnt);
+ mp_save->mnt = NULL;
+ rewrite_mtab(mlist, mnttabname);
+ }
+#endif /* MOUNT_TABLE_ON_FILE */
+ }
+
+ } else {
+
+ plog(XLOG_ERROR, "Couldn't find how to unmount %s", mntdir);
+ /*
+ * Assume it is already unmounted
+ */
+ error = 0;
+ } /* end of "if (mp_save)" statement */
+
+ free_mntlist(mlist);
+
+ return error;
+}
+
+
+#if defined(MNT2_GEN_OPT_FORCE) && defined(HAVE_UVMOUNT)
+/* force unmount, no questions asked, without touching mnttab file */
+int
+umount2_fs(const char *mntdir, u_int unmount_flags)
+{
+ int error = 0;
+#if 0
+ u_int vfs_id = 0;
+#endif /* 0 */
+
+ if (unmount_flags & AMU_UMOUNT_FORCE) {
+ plog(XLOG_INFO, "**UNIMPLEMENTED**: umount2_fs: trying unmount/forced on %s", mntdir);
+#if 0
+ /*
+ * XXX: need to implement. Call read_mtab and search mntlist for VFS ID
+ * of mntdir, then pass that ID to uvmount(), then call free_mntlist().
+ */
+ error = uvmount(vfs_id, MNT2_GEN_OPT_FORCE); /* AIX */
+ if (error < 0 && (errno == EINVAL || errno == ENOENT))
+ error = 0; /* ignore EINVAL/ENOENT */
+ if (error < 0)
+ plog(XLOG_WARNING, "%u: unmount/force: %m", vfs_id);
+ else
+ dlog("%s: unmount/force: OK", mntdir);
+#endif /* 0 */
+ }
+ return error;
+}
+#endif /* MNT2_GEN_OPT_FORCE && HAVE_UVMOUNT */