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Add 'netserver' command to EFI loader.

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In some environments is difficult to access bootp/dhcp
configuration as "standard user". Add a command that allows to set
or display the URI of the network server used as "net:" device.
Currently only tftp and nfs protocols are supported.

Typical usage pattern is:
netserver tftp://192.168.168.1/path_to_obj_dir/arm.armv7/sys/GENERIC/
boot net:kernel

Reviewed by:	imp, kevans
MFC after:	4 weeks
Differential Revision: https://reviews.freebsd.org/D26736
This commit is contained in:
Michal Meloun 2020-10-14 13:13:14 +00:00
parent a525283161
commit 5b5438c6f3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366700
1 changed files with 35 additions and 0 deletions
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35
stand/efi/loader/main.c
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@ -40,10 +40,14 @@ __FBSDID("$FreeBSD$");
#include <sys/zfs_bootenv.h>
#endif
#include <paths.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <stdint.h>
#include <string.h>
#include <setjmp.h>
#include <disk.h>
#include <dev_net.h>
#include <net.h>
#include <efi.h>
#include <efilib.h>
@ -1594,3 +1598,34 @@ command_chain(int argc, char *argv[])
}
COMMAND_SET(chain, "chain", "chain load file", command_chain);
extern struct in_addr servip;
static int
command_netserver(int argc, char *argv[])
{
char *proto;
n_long rootaddr;
if (argc > 2) {
command_errmsg = "wrong number of arguments";
return (CMD_ERROR);
}
if (argc < 2) {
proto = netproto == NET_TFTP ? "tftp://" : "nfs://";
printf("Netserver URI: %s%s%s\n", proto, intoa(rootip.s_addr),
rootpath);
return (CMD_OK);
}
if (argc == 2) {
strncpy(rootpath, argv[1], sizeof(rootpath));
rootpath[sizeof(rootpath) -1] = '\0';
if ((rootaddr = net_parse_rootpath()) != INADDR_NONE)
servip.s_addr = rootip.s_addr = rootaddr;
return (CMD_OK);
}
return (CMD_ERROR); /* not reached */
}
COMMAND_SET(netserver, "netserver", "change or display netserver URI",
command_netserver);