freebsd-skq/sys/boot/common/install.c
Stephen J. Kiernan 4f8155ddbc Add support for LOADER_RC setting in the pkgfs manifest (defaults to
/loader.rc) to specify a Forth file to read from the pkgfs tarball and
process by Ficl.

This allows for the tarball to do runtime things like load a
platform-specific FDT blob, among other things.

Reviewed by:	imp
Approved by:	sjg (mentor)
MFC after:	2 weeks
Sponsored by:	Juniper Networks, Inc.
Differential Revision:	https://reviews.freebsd.org/D8494
2016-11-11 17:41:17 +00:00

356 lines
7.5 KiB
C

/*-
* Copyright (c) 2008-2014, Juniper Networks, Inc.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <stand.h>
#include <net.h>
#include <string.h>
#include "bootstrap.h"
extern struct in_addr servip;
extern int pkgfs_init(const char *, struct fs_ops *);
extern void pkgfs_cleanup(void);
COMMAND_SET(install, "install", "install software package", command_install);
static char *inst_kernel;
static char **inst_modules;
static char *inst_rootfs;
static char *inst_loader_rc;
static int
setpath(char **what, char *val)
{
char *path;
size_t len;
int rel;
len = strlen(val) + 1;
rel = (val[0] != '/') ? 1 : 0;
path = malloc(len + rel);
if (path == NULL)
return (ENOMEM);
path[0] = '/';
strcpy(path + rel, val);
*what = path;
return (0);
}
static int
setmultipath(char ***what, char *val)
{
char *s, *v;
int count, error, idx;
count = 0;
v = val;
do {
count++;
s = strchr(v, ',');
v = (s == NULL) ? NULL : s + 1;
} while (v != NULL);
*what = calloc(count + 1, sizeof(char *));
if (*what == NULL)
return (ENOMEM);
for (idx = 0; idx < count; idx++) {
s = strchr(val, ',');
if (s != NULL)
*s++ = '\0';
error = setpath(*what + idx, val);
if (error)
return (error);
val = s;
}
return (0);
}
static int
read_metatags(int fd)
{
char buf[1024];
char *p, *tag, *val;
ssize_t fsize;
int error;
fsize = read(fd, buf, sizeof(buf));
if (fsize == -1)
return (errno);
/*
* Assume that if we read a whole buffer worth of data, we
* haven't read the entire file. In other words, the buffer
* size must always be larger than the file size. That way
* we can append a '\0' and use standard string operations.
* Return an error if this is not possible.
*/
if (fsize == sizeof(buf))
return (ENOMEM);
buf[fsize] = '\0';
error = 0;
tag = buf;
while (!error && *tag != '\0') {
val = strchr(tag, '=');
if (val == NULL) {
error = EINVAL;
break;
}
*val++ = '\0';
p = strchr(val, '\n');
if (p == NULL) {
error = EINVAL;
break;
}
*p++ = '\0';
if (strcmp(tag, "KERNEL") == 0)
error = setpath(&inst_kernel, val);
else if (strcmp(tag, "MODULES") == 0)
error = setmultipath(&inst_modules, val);
else if (strcmp(tag, "ROOTFS") == 0)
error = setpath(&inst_rootfs, val);
else if (strcmp(tag, "LOADER_RC") == 0)
error = setpath(&inst_loader_rc, val);
tag = p;
}
return (error);
}
static void
cleanup(void)
{
u_int i;
if (inst_kernel != NULL) {
free(inst_kernel);
inst_kernel = NULL;
}
if (inst_modules != NULL) {
i = 0;
while (inst_modules[i] != NULL)
free(inst_modules[i++]);
free(inst_modules);
inst_modules = NULL;
}
if (inst_rootfs != NULL) {
free(inst_rootfs);
inst_rootfs = NULL;
}
if (inst_loader_rc != NULL) {
free(inst_loader_rc);
inst_loader_rc = NULL;
}
pkgfs_cleanup();
}
/*
* usage: install URL
* where: URL = (tftp|file)://[host]/<package>
*/
static int
install(char *pkgname)
{
static char buf[256];
struct fs_ops *proto;
struct preloaded_file *fp;
char *s, *currdev;
const char *devname;
int error, fd, i, local;
s = strstr(pkgname, "://");
if (s == NULL)
goto invalid_url;
i = s - pkgname;
if (i == 4 && !strncasecmp(pkgname, "tftp", i)) {
devname = "net0";
proto = &tftp_fsops;
local = 0;
} else if (i == 4 && !strncasecmp(pkgname, "file", i)) {
currdev = getenv("currdev");
if (currdev != NULL && strcmp(currdev, "pxe0:") == 0) {
devname = "pxe0";
proto = NULL;
} else {
devname = "disk1";
proto = &dosfs_fsops;
}
local = 1;
} else
goto invalid_url;
s += 3;
if (*s == '\0')
goto invalid_url;
if (*s != '/' ) {
if (local)
goto invalid_url;
pkgname = strchr(s, '/');
if (pkgname == NULL)
goto invalid_url;
*pkgname = '\0';
servip.s_addr = inet_addr(s);
if (servip.s_addr == htonl(INADDR_NONE))
goto invalid_url;
setenv("serverip", inet_ntoa(servip), 1);
*pkgname = '/';
} else
pkgname = s;
if (strlen(devname) + strlen(pkgname) + 2 > sizeof(buf)) {
command_errmsg = "package name too long";
return (CMD_ERROR);
}
sprintf(buf, "%s:%s", devname, pkgname);
setenv("install_package", buf, 1);
error = pkgfs_init(buf, proto);
if (error) {
command_errmsg = "cannot open package";
goto fail;
}
/*
* Point of no return: unload anything that may have been
* loaded and prune the environment from harmful variables.
*/
unload();
unsetenv("vfs.root.mountfrom");
/*
* read the metatags file.
*/
fd = open("/metatags", O_RDONLY);
if (fd != -1) {
error = read_metatags(fd);
close(fd);
if (error) {
command_errmsg = "cannot load metatags";
goto fail;
}
}
s = (inst_kernel == NULL) ? "/kernel" : inst_kernel;
error = mod_loadkld(s, 0, NULL);
if (error) {
command_errmsg = "cannot load kernel from package";
goto fail;
}
/* If there is a loader.rc in the package, execute it */
s = (inst_loader_rc == NULL) ? "/loader.rc" : inst_loader_rc;
fd = open(s, O_RDONLY);
if (fd != -1) {
close(fd);
error = include(s);
if (error == CMD_ERROR)
goto fail;
}
i = 0;
while (inst_modules != NULL && inst_modules[i] != NULL) {
error = mod_loadkld(inst_modules[i], 0, NULL);
if (error) {
command_errmsg = "cannot load module(s) from package";
goto fail;
}
i++;
}
s = (inst_rootfs == NULL) ? "/install.iso" : inst_rootfs;
if (file_loadraw(s, "mfs_root", 1) == NULL) {
error = errno;
command_errmsg = "cannot load root file system";
goto fail;
}
cleanup();
fp = file_findfile(NULL, NULL);
if (fp != NULL)
file_formats[fp->f_loader]->l_exec(fp);
error = CMD_ERROR;
command_errmsg = "unable to start installation";
fail:
sprintf(buf, "%s (error %d)", command_errmsg, error);
cleanup();
unload();
exclusive_file_system = NULL;
command_errmsg = buf; /* buf is static. */
return (CMD_ERROR);
invalid_url:
command_errmsg = "invalid URL";
return (CMD_ERROR);
}
static int
command_install(int argc, char *argv[])
{
int argidx;
unsetenv("install_format");
argidx = 1;
while (1) {
if (argc == argidx) {
command_errmsg =
"usage: install [--format] <URL>";
return (CMD_ERROR);
}
if (!strcmp(argv[argidx], "--format")) {
setenv("install_format", "yes", 1);
argidx++;
continue;
}
break;
}
return (install(argv[argidx]));
}