BFS(4spp)           RISC/os Reference Manual            BFS(4spp)



NAME
     bfs - ethernet boot file server device

SYNOPSIS
     {
          "bfs",         cmcinit, cmcopen,
          cmcstrategy,  cmcclose,     cmcioctl,
          DTTYPECHAR,
          DTFSBFS, "boot server/CMC/egl ethernet"
     }

DESCRIPTION
     Bfs is a block server protocol that sits on top of a UDP/IP
     speaking ethernet device. Bfs communicates via a stateless
     protocol with the UMIPS-BSD program bfsd(8spp), which ser-
     vices its requests for file blocks.  By convention, bfsd
     services requests that arrive on UDP port 2201.  Before the
     bfs device may be used, the prom monitor environment vari-
     able, $netaddr, must be correctly assigned an internet
     address for this host.

REGISTERS
     bfs supports two Ethernet controllers with control registers
     in A24 supervisor address space.  Controller 0 has its con-
     trol registers based at 0xde0000, controller 1 has its con-
     trol registers based at 0xf00000.  The user may access cmc
     Ethernet controllers with control registers based dif-
     ferently that these by specifying the controller number as
     the negative of the control register base.

DIAGNOSTICS
     path too long for bfs
          File pathname was longer than 254 characters

     bind failed
          Bfs port already in use or out of standalone socket
          buffers

     $netaddr incorrect: %s
          Environment variable $netaddr not defined, or not in
          Internet standard "." notation.

     No server for %s
          No bfsd server replied that it could service the
          request for the file

     lost connection
          Bfs established communication with server and then lost
          it.  Also occurs with incorrectly setup sub-nets

     bfs read failed
          Bfsd server could not supply requested block



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BFS(4spp)           RISC/os Reference Manual            BFS(4spp)



     unsolicited bfs reply from host %s
          The indicated host transmitted a bfs packet without
          request

     %s:%s bad packet received
          Garbled bfs reply packet received

SEE ALSO
     udp(4spp), bfsd(8spp), bfs(5spp)














































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