diff options
| -rw-r--r-- | Documentation/filesystems/nfs/nfsroot.txt | 3 | ||||
| -rw-r--r-- | net/ipv4/ipconfig.c | 32 |
2 files changed, 34 insertions, 1 deletions
diff --git a/Documentation/filesystems/nfs/nfsroot.txt b/Documentation/filesystems/nfs/nfsroot.txt index 2d66ed688125..bb5ab6de5924 100644 --- a/Documentation/filesystems/nfs/nfsroot.txt +++ b/Documentation/filesystems/nfs/nfsroot.txt @@ -157,6 +157,9 @@ ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>: both: use both BOOTP and RARP but not DHCP (old option kept for backwards compatibility) + if dhcp is used, the client identifier can be used by following + format "ip=dhcp,client-id-type,client-id-value" + Default: any <dns0-ip> IP address of first nameserver. diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c index ed4ef09c2136..0bc7412d9e14 100644 --- a/net/ipv4/ipconfig.c +++ b/net/ipv4/ipconfig.c @@ -146,6 +146,10 @@ u8 root_server_path[256] = { 0, }; /* Path to mount as root */ /* vendor class identifier */ static char vendor_class_identifier[253] __initdata; +#if defined(CONFIG_IP_PNP_DHCP) +static char dhcp_client_identifier[253] __initdata; +#endif + /* Persistent data: */ static int ic_proto_used; /* Protocol used, if any */ @@ -728,6 +732,16 @@ ic_dhcp_init_options(u8 *options) memcpy(e, vendor_class_identifier, len); e += len; } + len = strlen(dhcp_client_identifier + 1); + /* the minimum length of identifier is 2, include 1 byte type, + * and can not be larger than the length of options + */ + if (len >= 1 && len < 312 - (e - options) - 1) { + *e++ = 61; + *e++ = len + 1; + memcpy(e, dhcp_client_identifier, len + 1); + e += len + 1; + } } *e++ = 255; /* End of the list */ @@ -1557,8 +1571,24 @@ static int __init ic_proto_name(char *name) return 0; } #ifdef CONFIG_IP_PNP_DHCP - else if (!strcmp(name, "dhcp")) { + else if (!strncmp(name, "dhcp", 4)) { + char *client_id; + ic_proto_enabled &= ~IC_RARP; + client_id = strstr(name, "dhcp,"); + if (client_id) { + char *v; + + client_id = client_id + 5; + v = strchr(client_id, ','); + if (!v) + return 1; + *v = 0; + if (kstrtou8(client_id, 0, dhcp_client_identifier)) + DBG("DHCP: Invalid client identifier type\n"); + strncpy(dhcp_client_identifier + 1, v + 1, 251); + *v = ','; + } return 1; } #endif |