diff options
Diffstat (limited to 'usr.sbin/amd/amd/nfs_subr.c')
| -rw-r--r-- | usr.sbin/amd/amd/nfs_subr.c | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/usr.sbin/amd/amd/nfs_subr.c b/usr.sbin/amd/amd/nfs_subr.c new file mode 100644 index 0000000..297cf93 --- /dev/null +++ b/usr.sbin/amd/amd/nfs_subr.c @@ -0,0 +1,552 @@ +/* + * Copyright (c) 1990 Jan-Simon Pendry + * Copyright (c) 1990 Imperial College of Science, Technology & Medicine + * Copyright (c) 1990, 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. + * + * @(#)nfs_subr.c 8.1 (Berkeley) 6/6/93 + * + * $Id: nfs_subr.c,v 5.2.2.1 1992/02/09 15:08:53 jsp beta $ + * + */ + +#include "am.h" + +/* + * Convert from UN*X to NFS error code + */ +#ifdef NFS_ERROR_MAPPING +NFS_ERROR_MAPPING +#define nfs_error(e) \ + ((nfsstat)((e) > NFS_LOMAP && (e) < NFS_HIMAP ? \ + nfs_errormap[(e) - NFS_LOMAP] : (e))) +#else +#define nfs_error(e) ((nfsstat)(e)) +#endif /* NFS_ERROR_MAPPING */ + +static char *do_readlink P((am_node *mp, int *error_return, struct attrstat **attrpp)); +static char *do_readlink(mp, error_return, attrpp) +am_node *mp; +int *error_return; +struct attrstat **attrpp; +{ + char *ln; + + /* + * If there is a readlink method, then use + * that, otherwise if a link exists use + * that, otherwise use the mount point. + */ + if (mp->am_mnt->mf_ops->readlink) { + int retry = 0; + mp = (*mp->am_mnt->mf_ops->readlink)(mp, &retry); + if (mp == 0) { + *error_return = retry; + return 0; + } + /*reschedule_timeout_mp();*/ + } + if (mp->am_link) { + ln = mp->am_link; + } else { + ln = mp->am_mnt->mf_mount; + } + if (attrpp) + *attrpp = &mp->am_attr; + return ln; +} + +/*ARGSUSED*/ +voidp +nfsproc_null_2(argp, rqstp) +voidp argp; +struct svc_req *rqstp; +{ + static char res; + + return (voidp) &res; +} + + +/*ARGSUSED*/ +struct attrstat * +nfsproc_getattr_2(argp, rqstp) +struct nfs_fh *argp; +struct svc_req *rqstp; +{ + static struct attrstat res; + am_node *mp; + int retry; + +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "gettattr:"); +#endif /* DEBUG */ + + mp = fh_to_mp2(argp, &retry); + if (mp == 0) { +#ifdef PRECISE_SYMLINKS +getattr_retry: +#endif /* PRECISE_SYMLINKS */ + + if (retry < 0) + return 0; + res.status = nfs_error(retry); + } else { + struct attrstat *attrp = &mp->am_attr; +#ifdef PRECISE_SYMLINKS + if (mp->am_fattr.type == NFLNK) { + /* + * Make sure we can read the link, + * and then determine the length. + */ + char *ln = do_readlink(mp, &retry, &attrp); + if (ln == 0) + goto getattr_retry; + } +#endif /* PRECISE_SYMLINKS */ +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "\tstat(%s), size = %d", mp->am_path, attrp->attrstat_u.attributes.size); +#endif /* DEBUG */ + mp->am_stats.s_getattr++; + return attrp; + } + + return &res; +} + + +/*ARGSUSED*/ +struct attrstat * +nfsproc_setattr_2(argp, rqstp) +struct sattrargs *argp; +struct svc_req *rqstp; +{ + static struct attrstat res; + + if (!fh_to_mp(&argp->file)) + res.status = nfs_error(ESTALE); + else + res.status = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +voidp +nfsproc_root_2(argp, rqstp) +voidp argp; +struct svc_req *rqstp; +{ + static char res; + + return (voidp)&res; +} + + +/*ARGSUSED*/ +struct diropres * +nfsproc_lookup_2(argp, rqstp) +struct diropargs *argp; +struct svc_req *rqstp; +{ + static struct diropres res; + am_node *mp; + int retry; + +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "lookup:"); +#endif /* DEBUG */ + + mp = fh_to_mp2(&argp->dir, &retry); + if (mp == 0) { + if (retry < 0) + return 0; + res.status = nfs_error(retry); + } else { + int error; + am_node *ap; +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "\tlookuppn(%s, %s)", mp->am_path, argp->name); +#endif /* DEBUG */ + ap = (*mp->am_mnt->mf_ops->lookuppn)(mp, argp->name, &error, VLOOK_CREATE); + if (ap == 0) { + if (error < 0) { +#ifdef DEBUG + dlog("Not sending RPC reply"); +#endif /* DEBUG */ + amd_stats.d_drops++; + return 0; + } + res.status = nfs_error(error); + } else { + mp_to_fh(ap, &res.diropres_u.diropres.file); + res.diropres_u.diropres.attributes = ap->am_fattr; + res.status = NFS_OK; + } + mp->am_stats.s_lookup++; + /*reschedule_timeout_mp();*/ + } + + return &res; +} + + +/*ARGSUSED*/ +struct readlinkres * +nfsproc_readlink_2(argp, rqstp) +struct nfs_fh *argp; +struct svc_req *rqstp; +{ + static struct readlinkres res; + am_node *mp; + int retry; + +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "readlink:"); +#endif /* DEBUG */ + + mp = fh_to_mp2(argp, &retry); + if (mp == 0) { +readlink_retry: + if (retry < 0) + return 0; + res.status = nfs_error(retry); + } else { + char *ln = do_readlink(mp, &retry, (struct attrstat **) 0); + if (ln == 0) + goto readlink_retry; + res.status = NFS_OK; +#ifdef DEBUG + Debug(D_TRACE) + if (ln) + plog(XLOG_DEBUG, "\treadlink(%s) = %s", mp->am_path, ln); +#endif /* DEBUG */ + res.readlinkres_u.data = ln; + mp->am_stats.s_readlink++; + } + + return &res; +} + + +/*ARGSUSED*/ +struct readres * +nfsproc_read_2(argp, rqstp) +struct readargs *argp; +struct svc_req *rqstp; +{ + static struct readres res; + + bzero((char *)&res, sizeof(res)); + + res.status = nfs_error(EACCES); + + return &res; +} + + +/*ARGSUSED*/ +voidp +nfsproc_writecache_2(argp, rqstp) +voidp argp; +struct svc_req *rqstp; +{ + static char res; + + return (voidp) &res; +} + + +/*ARGSUSED*/ +struct attrstat * +nfsproc_write_2(argp, rqstp) +writeargs *argp; +struct svc_req *rqstp; +{ + static struct attrstat res; + + if (!fh_to_mp(&argp->file)) + res.status = nfs_error(ESTALE); + else + res.status = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +struct diropres * +nfsproc_create_2(argp, rqstp) +createargs *argp; +struct svc_req *rqstp; +{ + static struct diropres res; + + if (!fh_to_mp(&argp->where.dir)) + res.status = nfs_error(ESTALE); + else + res.status = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +static nfsstat * +unlink_or_rmdir(argp, rqstp, unlinkp) +struct diropargs *argp; +struct svc_req *rqstp; +int unlinkp; +{ + static nfsstat res; + int retry; + /*mntfs *mf;*/ + am_node *mp = fh_to_mp3(&argp->dir, &retry, VLOOK_DELETE); + if (mp == 0) { + if (retry < 0) + return 0; + res = nfs_error(retry); + goto out; + } + /*mf = mp->am_mnt;*/ + if (mp->am_fattr.type != NFDIR) { + res = nfs_error(ENOTDIR); + goto out; + } +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "\tremove(%s, %s)", mp->am_path, argp->name); +#endif /* DEBUG */ + mp = (*mp->am_mnt->mf_ops->lookuppn)(mp, argp->name, &retry, VLOOK_DELETE); + if (mp == 0) { + /* + * Ignore retries... + */ + if (retry < 0) + retry = 0; + /* + * Usual NFS workaround... + */ + else if (retry == ENOENT) + retry = 0; + res = nfs_error(retry); + } else { + forcibly_timeout_mp(mp); + res = NFS_OK; + } + +out: + return &res; +} + + +/*ARGSUSED*/ +nfsstat * +nfsproc_remove_2(argp, rqstp) +struct diropargs *argp; +struct svc_req *rqstp; +{ + return unlink_or_rmdir(argp, rqstp, TRUE); +} + +/*ARGSUSED*/ +nfsstat * +nfsproc_rename_2(argp, rqstp) +renameargs *argp; +struct svc_req *rqstp; +{ + static nfsstat res; + if (!fh_to_mp(&argp->from.dir) || !fh_to_mp(&argp->to.dir)) + res = nfs_error(ESTALE); + /* + * If the kernel is doing clever things with referenced files + * then let it pretend... + */ + else if (strncmp(argp->to.name, ".nfs", 4) == 0) + res = NFS_OK; + /* + * otherwise a failure + */ + else + res = nfs_error(EROFS); + return &res; +} + + +/*ARGSUSED*/ +nfsstat * +nfsproc_link_2(argp, rqstp) +linkargs *argp; +struct svc_req *rqstp; +{ + static nfsstat res; + if (!fh_to_mp(&argp->from) || !fh_to_mp(&argp->to.dir)) + res = nfs_error(ESTALE); + else + res = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +nfsstat * +nfsproc_symlink_2(argp, rqstp) +symlinkargs *argp; +struct svc_req *rqstp; +{ + static nfsstat res; + if (!fh_to_mp(&argp->from.dir)) + res = nfs_error(ESTALE); + else + res = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +struct diropres * +nfsproc_mkdir_2(argp, rqstp) +createargs *argp; +struct svc_req *rqstp; +{ + static struct diropres res; + if (!fh_to_mp(&argp->where.dir)) + res.status = nfs_error(ESTALE); + else + res.status = nfs_error(EROFS); + + return &res; +} + + +/*ARGSUSED*/ +nfsstat * +nfsproc_rmdir_2(argp, rqstp) +struct diropargs *argp; +struct svc_req *rqstp; +{ + return unlink_or_rmdir(argp, rqstp, FALSE); +} + + +/*ARGSUSED*/ +struct readdirres * +nfsproc_readdir_2(argp, rqstp) +readdirargs *argp; +struct svc_req *rqstp; +{ + static readdirres res; + static entry e_res[MAX_READDIR_ENTRIES]; + am_node *mp; + int retry; + +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "readdir:"); +#endif /* DEBUG */ + + mp = fh_to_mp2(&argp->dir, &retry); + if (mp == 0) { + if (retry < 0) + return 0; + res.status = nfs_error(retry); + } else { +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "\treaddir(%s)", mp->am_path); +#endif /* DEBUG */ + res.status = nfs_error((*mp->am_mnt->mf_ops->readdir)(mp, argp->cookie, + &res.readdirres_u.reply, e_res, argp->count)); + mp->am_stats.s_readdir++; + } + + return &res; +} + +/*ARGSUSED*/ +struct statfsres * +nfsproc_statfs_2(argp, rqstp) +struct nfs_fh *argp; +struct svc_req *rqstp; +{ + static statfsres res; + am_node *mp; + int retry; + +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "statfs:"); +#endif /* DEBUG */ + + mp = fh_to_mp2(argp, &retry); + if (mp == 0) { + if (retry < 0) + return 0; + res.status = nfs_error(retry); + } else { + statfsokres *fp; +#ifdef DEBUG + Debug(D_TRACE) + plog(XLOG_DEBUG, "\tstat_fs(%s)", mp->am_path); +#endif /* DEBUG */ + /* + * just return faked up file system information + */ + + fp = &res.statfsres_u.reply; + + fp->tsize = 1024; + fp->bsize = 4096; +#ifdef HAS_EMPTY_AUTOMOUNTS + fp->blocks = 0; +#else + fp->blocks = 1; +#endif + fp->bfree = 0; + fp->bavail = 0; + + res.status = NFS_OK; + mp->am_stats.s_statfs++; + } + + return &res; +} |
