1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)nfsdiskless.h 8.2 (Berkeley) 03/30/95 11 */ 12 13 14 #ifndef _NFS_NFSDISKLESS_H_ 15 #define _NFS_NFSDISKLESS_H_ 16 17 /* 18 * Structure that must be initialized for a diskless nfs client. 19 * This structure is used by nfs_mountroot() to set up the root and swap 20 * vnodes plus do a partial ifconfig(8) and route(8) so that the critical net 21 * interface can communicate with the server. 22 * The primary bootstrap is expected to fill in the appropriate fields before 23 * starting the kernel. Whether or not the swap area is nfs mounted is 24 * determined by the value in swdevt[0]. (equal to NODEV --> swap over nfs) 25 * Currently only works for AF_INET protocols. 26 * NB: All fields are stored in net byte order to avoid hassles with 27 * client/server byte ordering differences. 28 */ 29 30 /* 31 * I have defined a new structure that can handle an NFS Version 3 file handle 32 * but the kernel still expects the old Version 2 one to be provided. The 33 * changes required in nfs_vfsops.c for using the new are documented there in 34 * comments. (I felt that breaking network booting code by changing this 35 * structure would not be prudent at this time, since almost all servers are 36 * still Version 2 anyhow.) 37 */ 38 struct nfsv3_diskless { 39 struct ifaliasreq myif; /* Default interface */ 40 struct sockaddr_in mygateway; /* Default gateway */ 41 struct nfs_args swap_args; /* Mount args for swap file */ 42 int swap_fhsize; /* Size of file handle */ 43 u_char swap_fh[NFSX_V3FHMAX]; /* Swap file's file handle */ 44 struct sockaddr_in swap_saddr; /* Address of swap server */ 45 char swap_hostnam[MNAMELEN]; /* Host name for mount pt */ 46 int swap_nblks; /* Size of server swap file */ 47 struct ucred swap_ucred; /* Swap credentials */ 48 struct nfs_args root_args; /* Mount args for root fs */ 49 int root_fhsize; /* Size of root file handle */ 50 u_char root_fh[NFSX_V3FHMAX]; /* File handle of root dir */ 51 struct sockaddr_in root_saddr; /* Address of root server */ 52 char root_hostnam[MNAMELEN]; /* Host name for mount pt */ 53 long root_time; /* Timestamp of root fs */ 54 char my_hostnam[MAXHOSTNAMELEN]; /* Client host name */ 55 }; 56 57 struct nfs_diskless { 58 struct ifaliasreq myif; /* Default interface */ 59 struct sockaddr_in mygateway; /* Default gateway */ 60 struct nfs_args swap_args; /* Mount args for swap file */ 61 u_char swap_fh[NFSX_V2FH]; /* Swap file's file handle */ 62 struct sockaddr_in swap_saddr; /* Address of swap server */ 63 char swap_hostnam[MNAMELEN]; /* Host name for mount pt */ 64 int swap_nblks; /* Size of server swap file */ 65 struct ucred swap_ucred; /* Swap credentials */ 66 struct nfs_args root_args; /* Mount args for root fs */ 67 u_char root_fh[NFSX_V2FH]; /* File handle of root dir */ 68 struct sockaddr_in root_saddr; /* Address of root server */ 69 char root_hostnam[MNAMELEN]; /* Host name for mount pt */ 70 long root_time; /* Timestamp of root fs */ 71 char my_hostnam[MAXHOSTNAMELEN]; /* Client host name */ 72 }; 73 74 #endif 75