mirror of
https://github.com/opnsense/src.git
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9777aa3f12
as a shared library. This is intended to be used by BHyVe to load FreeBSD kernels into new virtual machines.
198 lines
3.9 KiB
C
198 lines
3.9 KiB
C
/*-
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* Copyright (c) 2011 Google, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Read from the host filesystem
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stand.h>
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#include <bootstrap.h>
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#include "libuserboot.h"
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/*
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* Open a file.
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*/
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static int
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host_open(const char *upath, struct open_file *f)
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{
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if (f->f_dev != &host_dev)
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return (EINVAL);
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return (CALLBACK(open, upath, &f->f_fsdata));
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}
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static int
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host_close(struct open_file *f)
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{
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CALLBACK(close, f->f_fsdata);
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f->f_fsdata = (void *)0;
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return (0);
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}
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/*
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* Copy a portion of a file into memory.
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*/
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static int
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host_read(struct open_file *f, void *start, size_t size, size_t *resid)
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{
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return (CALLBACK(read, f->f_fsdata, start, size, resid));
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}
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/*
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* Don't be silly - the bootstrap has no business writing anything.
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*/
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static int
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host_write(struct open_file *f, void *start, size_t size, size_t *resid)
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{
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return (EROFS);
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}
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static off_t
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host_seek(struct open_file *f, off_t offset, int where)
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{
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return (CALLBACK(seek, f->f_fsdata, offset, where));
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}
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static int
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host_stat(struct open_file *f, struct stat *sb)
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{
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int mode;
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int uid;
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int gid;
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uint64_t size;
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CALLBACK(stat, f->f_fsdata, &mode, &uid, &gid, &size);
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sb->st_mode = mode;
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sb->st_uid = uid;
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sb->st_gid = gid;
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sb->st_size = size;
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return (0);
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}
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static int
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host_readdir(struct open_file *f, struct dirent *d)
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{
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uint32_t fileno;
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uint8_t type;
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size_t namelen;
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int rc;
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rc = CALLBACK(readdir, f->f_fsdata, &fileno, &type, &namelen,
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d->d_name);
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if (rc)
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return (rc);
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d->d_fileno = fileno;
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d->d_type = type;
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d->d_namlen = namelen;
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return (0);
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}
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static int
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host_dev_init(void)
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{
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return (0);
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}
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static void
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host_dev_print(int verbose)
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{
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char line[80];
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sprintf(line, " host%d: Host filesystem\n", 0);
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pager_output(line);
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}
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/*
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* 'Open' the host device.
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*/
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static int
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host_dev_open(struct open_file *f, ...)
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{
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va_list args;
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struct devdesc *dev;
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va_start(args, f);
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dev = va_arg(args, struct devdesc*);
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va_end(args);
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return (0);
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}
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static int
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host_dev_close(struct open_file *f)
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{
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return (0);
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}
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static int
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host_dev_strategy(void *devdata, int rw, daddr_t dblk, size_t size,
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char *buf, size_t *rsize)
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{
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return (ENOSYS);
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}
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struct fs_ops host_fsops = {
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"host",
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host_open,
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host_close,
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host_read,
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host_write,
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host_seek,
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host_stat,
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host_readdir
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};
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struct devsw host_dev = {
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.dv_name = "host",
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.dv_type = DEVT_NET,
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.dv_init = host_dev_init,
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.dv_strategy = host_dev_strategy,
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.dv_open = host_dev_open,
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.dv_close = host_dev_close,
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.dv_ioctl = noioctl,
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.dv_print = host_dev_print,
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.dv_cleanup = NULL
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};
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