All the code are now only issueing one single dhcp request at startup of the
loader meaning we can always request a the PXE informations from the
dhcp server.
Previous code lost that information, meaning no option 55 anymore (meaning not
working with the kea dhcp server) and no request for rootpath etc, no user class
Remove the flags from the bootp function which is not needed anymore
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D10952
rfc3004 allows to pass multiple user classes on dhcp requests
this is used by dhcp servers to differentiate the caller if needed.
As an example with isc dhcp server it will be possible to make options
only for the FreeBSD loaders:
if exists user-class and option user-class = "FREEBSD" {
option root-path "tftp://192.168.42.1/FreeBSD;
}
Reviewed by: tsoome
Differential Revision: https://reviews.freebsd.org/D10951
The current read from network is working from up to down - we have some
protocol needing the data from the network, so we build the buffer space
for that protocol, add the extra space for headers and pass this buffer
down to be filled by nif get call in hope, we have guessed the incoming
packet size right. Amazingly enough this approach mostly does work, but
not always...
So, this update does work from down to up - we allocate buffer (based
on MTU or frame size info), fill it up, and pass on for upper layers.
The obvious problem is that when we should free the buffer - if at all.
In the current implementation the upper layer will free the packet on error
or when the packet is no longer needed.
While working on the issue, the additional issue did pop up - the bios
implementation does not have generic get/put interface but is using pxe
udpsend/udpreceive instead. So the udp calls are gone and undi interface
is implemented instead. Which in turn means slight other changes as we
do not need to have duplicated pxe implementation and can just use dev_net.
To align packet content, the actual read from nic is using shifted buffer by
ETHER_ALIGN (2).
Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D10232
Don't use DHCP 150 option to decide which protocol use to netboot. When
root-path includes ip address - go thru NFS, if ip address not exists in
root-path - go thru TFTP from server which ip address is in next-server. But
there is one limitation - only one tftp server in network to provide loader and
everything else. Does enybody use more than only one?
Submitted by: kczekirda
Sponsored by: Oktawave
MFC after: 3 weeks
Relnote: Yes
Differential Revision: https://reviews.freebsd.org/D8740
Add a new 'netproto' variable which can be set for now to
NET_TFTP or NET_NFS (default to NET_NONE)
From the dhcp options if one sets the root-path option to:
"ip:path", the loader will consider it is booting over NFS
(meaning same behaviour as the default current behaviour)
if the dhcp option "tftp server address" is set (option 150)
the loader will consider it is booting over tftpfs, it will then
consider the root-path options with 2 possible case
1. "path" then the IP of the tftp server will be the one passed by
the option 150, and the files will be retrieved under "path" on the tftp
server
2. "ip:path" then the IP of the tftp server will be the one passed in
the option "overwritting the IP from the option 150.
We could not "abuse" the rootpath option in the form or tftp://ip:path because
this is already used for other purpose by iPXE preventing any chainload from
iPXE to the FreeBSD loader.
Given at each open(), the loader loops over all available filesystems and keep
the "best" error, we needed to prevent tftpfs to fallback on nfs and vice versa.
the tftpfs and nfs implementation in libstand now return EINVAL early if
'netproto' for that purpose.
Reviewed by: tsoome
Relnotes: yes
Sponsored by: Gandi.net
Differential Revision: https://reviews.freebsd.org/D7628
the value in a new global intf_mtu for use by the application.
These changes were inspired by the patch provided by Robert Blayzor in
PR 187094, and will allow loader(8) to propagate the value to the kernel
along with the other nfs_diskless parms delivered via environment vars.
identifier to the DHCP server. Now you can check for this string
in your dhcp configuration to decide whether you will hand out a
lease to the client or not.
