diff options
Diffstat (limited to 'usr.sbin/amd/amd/ifs_ops.c')
| -rw-r--r-- | usr.sbin/amd/amd/ifs_ops.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/usr.sbin/amd/amd/ifs_ops.c b/usr.sbin/amd/amd/ifs_ops.c new file mode 100644 index 0000000..14df832 --- /dev/null +++ b/usr.sbin/amd/amd/ifs_ops.c @@ -0,0 +1,195 @@ +/* + * Copyright (c) 1989 Jan-Simon Pendry + * Copyright (c) 1989 Imperial College of Science, Technology & Medicine + * Copyright (c) 1989, 1993 + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + * + * @(#)ifs_ops.c 8.1 (Berkeley) 6/6/93 + * + * $Id: ifs_ops.c,v 5.2.2.1 1992/02/09 15:08:26 jsp beta $ + * + */ + +#include "am.h" + +#ifdef HAS_IFS + +/* + * Inheritance file system. + * This implements a filesystem restart. + * + * This is a *gross* hack - it knows far too + * much about the way other parts of the + * sytem work. See restart.c too. + */ +static char not_a_filesystem[] = "Attempting to inherit not-a-filesystem"; +/* + * This should never be called. + */ +/*ARGSUSED*/ +static char *ifs_match P((am_opts *fo)); +static char *ifs_match(fo) +am_opts *fo; +{ + plog(XLOG_FATAL, "ifs_match called!"); + return 0; +} + +static int ifs_init P((mntfs *mf)); +static int ifs_init(mf) +mntfs *mf; +{ + mntfs *mf_link = (mntfs *) mf->mf_private; + if (mf_link == 0) { + plog(XLOG_FATAL, not_a_filesystem); + return EINVAL; + } +#ifdef notdef + /* + * Fill in attribute fields + */ + mf_link->mf_fattr.type = NFLNK; + mf_link->mf_fattr.mode = NFSMODE_LNK | 0777; + mf_link->mf_fattr.nlink = 1; + mf_link->mf_fattr.size = MAXPATHLEN / 4; +#endif + if (mf_link->mf_ops->fs_init) + return (*mf_link->mf_ops->fs_init)(mf_link); + return 0; +} + +static mntfs *ifs_inherit P((mntfs *mf)); +static mntfs *ifs_inherit(mf) +mntfs *mf; +{ + /* + * Take the linked mount point and + * propogate. + */ + mntfs *mf_link = (mntfs *) mf->mf_private; + if (mf_link == 0) { + plog(XLOG_FATAL, not_a_filesystem); + return 0; /*XXX*/ + } + + mf_link->mf_fo = mf->mf_fo; +#ifdef notdef + mf_link->mf_fattr.fileid = mf->mf_fattr.fileid; +#endif /* notdef */ + + /* + * Discard the old map. + * Don't call am_unmounted since this + * node was never really mounted in the + * first place. + */ + mf->mf_private = 0; + free_mntfs(mf); + /* + * Free the dangling reference + * to the mount link. + */ + free_mntfs(mf_link); + /* + * Get a hold of the other entry + */ + mf_link->mf_flags &= ~MFF_RESTART; + + /* Say what happened */ + plog(XLOG_INFO, "restarting %s on %s", mf_link->mf_info, mf_link->mf_mount); + + return mf_link; +} + +static int ifs_mount P((am_node *mp)); +static int ifs_mount(mp) +am_node *mp; +{ + mntfs *newmf = ifs_inherit(mp->am_mnt); + if (newmf) { + mp->am_mnt = newmf; + /* + * XXX - must do the am_mounted call here + */ + if (newmf->mf_ops->fs_flags & FS_MBACKGROUND) + am_mounted(mp); + + new_ttl(mp); + return 0; + } + return EINVAL; +} + +static int ifs_fmount P((mntfs *mf)); +static int ifs_fmount(mf) +mntfs *mf; +{ + am_node *mp = find_mf(mf); + if (mp) + return ifs_mount(mp); + return ifs_inherit(mf) ? 0 : EINVAL; +} + +/*ARGSUSED*/ +static int ifs_fumount P((mntfs *mf)); +static int ifs_fumount(mf) +mntfs *mf; +{ + /* + * Always succeed + */ + return 0; +} + +/* + * Ops structure + */ +am_ops ifs_ops = { + "inherit", + ifs_match, + ifs_init, + ifs_mount, + ifs_fmount, + auto_fumount, + ifs_fumount, + efs_lookuppn, + efs_readdir, + 0, /* ifs_readlink */ + 0, /* ifs_mounted */ + 0, /* ifs_umounted */ + find_afs_srvr, + FS_DISCARD +}; + +#endif /* HAS_IFS */ |
