/* $NetBSD: umount_aix.c,v 1.1.1.3 2015/01/17 16:34:16 christos Exp $ */ /* * 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 */