Support for MTFTP restoration

[cdelfosse]

Pulse 1.3.0 must support multicast TFTP restoration.

[nrueff]

MTFTP restoration is done client-side (ATM, either "revorestorenfs" is given command-line, or we are doing mtftp restoration).

Depending on the requested behavior (NFS of MTFTP), autorestore.c uses different mechanisms to collect data :

    /* default: mtftp restore */
    fops.open = tftp_open;
    fops.close = tftp_close;
    fops.get = tftp_get;

    if (!mtftp) {
        /* nfs restore */
        fops.open = file_open;
        fops.close = file_close;
        fops.get = file_get;
    }

To introduce a new keyword would be handy ("revorestoremtftp" ?).

Some things have yet to be done :

• the images have to be served by atftp,
• some work has to be done within autorestore.c (tft_open()) for the client to request the right files

[cdelfosse]

The restore command line in the generated boot menus now contains the revorestoremtftp keyword when MTFTP has been selected.

[cdelfosse]

MTFTP restoration doesn't work. The imaging client boots but loops on these messages:

Option blksize = 4096
Option multicast =
Not connected.

Here is the GRUB command that was used:

title Backup of computer2
desc 2010-07-28T16:53:52Z, 117.6 MiB
kernel (nd)/diskless/kernel quiet revonospc revosavedir=masters revoinfodir=computers revooptdir=postinst revobase=/var/lib/pulse2/imaging revorestoremtftp revopost revomac=000C293FDC72 revoimage=6dde60ba-9a68-11df-848f-000c293fdc72 
initrd (nd)/diskless/initrd

[ydroneaud@…]

Fixed by commits r7534 r7535 r7536 r7537 and additionally r7571

Pulse 2 Imaging client now use the correct path scheme, with optional LRS compatibility. Use command line option --mode={lrs,pulse2} to select mode. default is pulse2.

[cdelfosse]

Fix by Yann seems to work fine ! I will add now the needed code to generate the revowait option on the Pulse 2 client kernel command line.

[cdelfosse]

Done in r7666 r7667 r7668