include/libnfs-private.h

   1 /*
   2    Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 2.1 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #include <sys/socket.h>  /* struct sockaddr_storage */
  18
  19 #include "libnfs-zdr.h"
  20
  21 struct rpc_fragment {
  22         struct rpc_fragment *next;
  23         uint64_t size;
  24         char *data;
  25 };
  26
  27 struct rpc_context {
  28         int fd;
  29         int is_connected;
  30
  31         char *error_string;
  32
  33         rpc_cb connect_cb;
  34         void *connect_data;
  35
  36         AUTH *auth;
  37         unsigned long xid;
  38
  39        /* buffer used for encoding RPC PDU */
  40        char *encodebuf;
  41        int encodebuflen;
  42
  43        struct rpc_pdu *outqueue;
  44        struct sockaddr_storage udp_src;
  45        struct rpc_pdu *waitpdu;
  46
  47        int inpos;
  48        int insize;
  49        char *inbuf;
  50
  51        /* special fields for UDP, which can sometimes be BROADCASTed */
  52        int is_udp;
  53        struct sockaddr *udp_dest;
  54        int is_broadcast;
  55
  56        /* track the address we connect to so we can auto-reconnect on session failure */
  57        struct sockaddr_storage s;
  58        int auto_reconnect;
  59
  60         /* fragment reassembly */
  61         struct rpc_fragment *fragments;
  62 };
  63
  64 struct rpc_pdu {
  65         struct rpc_pdu *next;
  66
  67         unsigned long xid;
  68         ZDR zdr;
  69
  70         int written;
  71         struct rpc_data outdata;
  72
  73         rpc_cb cb;
  74         void *private_data;
  75
  76         /* function to decode the zdr reply data and buffer to decode into */
  77         zdrproc_t zdr_decode_fn;
  78         caddr_t zdr_decode_buf;
  79         int zdr_decode_bufsize;
  80 };
  81
  82 struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, zdrproc_t zdr_decode_fn, int zdr_bufsize);
  83 void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  84 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  85 int rpc_get_pdu_size(char *buf);
  86 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
  87 void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
  88
  89 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
  90 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
  91
  92 const char *nfs_get_server(struct nfs_context *nfs);
  93 const char *nfs_get_export(struct nfs_context *nfs);
  94
  95 /* we dont want to expose UDP to normal applications/users  this is private to libnfs to use exclusively for broadcast RPC */
  96 int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
  97 int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
  98 struct rpc_context *rpc_init_udp_context(void);
  99 struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc);
 100
 101 void rpc_set_autoreconnect(struct rpc_context *rpc);
 102 void rpc_unset_autoreconnect(struct rpc_context *rpc);
 103
 104 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size);
 105 void rpc_free_all_fragments(struct rpc_context *rpc);
 106
 107 const struct nfs_fh3 *nfs_get_rootfh(struct nfs_context *nfs);