1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 * Redistribution and use in source and binary forms are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * @(#)nfsmount.h 7.2 (Berkeley) 02/16/90 21 */ 22 23 /* 24 * Mount structure. 25 * One allocated on every NFS mount. 26 * Holds NFS specific information for mount. 27 */ 28 struct nfsmount { 29 int nm_flag; /* Flags for soft/hard... */ 30 struct mount *nm_mountp; /* Vfs structure for this filesystem */ 31 nfsv2fh_t nm_fh; /* File handle of root dir */ 32 struct socket *nm_so; /* Rpc socket */ 33 struct nfshost *nm_hostinfo; /* Host and congestion information */ 34 short nm_retry; /* Max retry count */ 35 short nm_rexmit; /* Rexmit on previous request */ 36 short nm_rtt; /* Round trip timer ticks @ NFS_HZ */ 37 short nm_rto; /* Current timeout */ 38 short nm_srtt; /* Smoothed round trip time */ 39 short nm_rttvar; /* RTT variance */ 40 int nm_rsize; /* Max size of read rpc */ 41 int nm_wsize; /* Max size of write rpc */ 42 char nm_host[MNAMELEN]; /* Remote host name */ 43 char nm_path[MNAMELEN]; /* Path mounted on */ 44 }; 45 46 /* 47 * Hostinfo/congestion structure. 48 * One allocated per NFS server. 49 * Holds host address, congestion limits, request count, etc. 50 * Reference count is of nfsmounts which point to it. 51 */ 52 struct nfshost { 53 struct nfshost *nh_next, *nh_prev; 54 short nh_refcnt; /* Reference count */ 55 short nh_currto; /* Current rto of any nfsmount */ 56 short nh_currexmit; /* Max rexmit count of nfsmounts */ 57 short nh_sent; /* Request send count */ 58 short nh_window; /* Request send window (max) */ 59 short nh_winext; /* Window incremental value */ 60 short nh_ssthresh; /* Slowstart threshold */ 61 short nh_salen; /* Actual length of nh_sockaddr */ 62 struct mbuf *nh_sockaddr; /* Address of server */ 63 }; 64 65 struct nfsmount *vfs_to_nfs(); 66