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 <rpc/xdr.h>
  18 #include <rpc/auth.h>
  19
  20 struct rpc_fragment {
  21         struct rpc_fragment *next;
  22         uint64_t size;
  23         char *data;
  24 };
  25
  26 struct rpc_context {
  27         int fd;
  28         int is_connected;
  29
  30         char *error_string;
  31
  32         rpc_cb connect_cb;
  33         void *connect_data;
  34
  35         AUTH *auth;
  36         unsigned long xid;
  37
  38        /* buffer used for encoding RPC PDU */
  39        char *encodebuf;
  40        int encodebuflen;
  41
  42        struct rpc_pdu *outqueue;
  43        struct sockaddr_storage udp_src;
  44        struct rpc_pdu *waitpdu;
  45
  46        int inpos;
  47        int insize;
  48        char *inbuf;
  49
  50        /* special fields for UDP, which can sometimes be BROADCASTed */
  51        int is_udp;
  52        struct sockaddr *udp_dest;
  53        int is_broadcast;
  54
  55        /* track the address we connect to so we can auto-reconnect on session failure */
  56        struct sockaddr_storage s;
  57        int auto_reconnect;
  58
  59         /* fragment reassembly */
  60         struct rpc_fragment *fragments;
  61 };
  62
  63 struct rpc_pdu {
  64         struct rpc_pdu *next;
  65
  66         unsigned long xid;
  67         XDR xdr;
  68
  69         int written;
  70         struct rpc_data outdata;
  71
  72         rpc_cb cb;
  73         void *private_data;
  74
  75         /* function to decode the xdr reply data and buffer to decode into */
  76         xdrproc_t xdr_decode_fn;
  77         caddr_t xdr_decode_buf;
  78         int xdr_decode_bufsize;
  79 };
  80
  81 struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, xdrproc_t xdr_decode_fn, int xdr_bufsize);
  82 void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  83 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  84 int rpc_get_pdu_size(char *buf);
  85 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
  86 void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
  87
  88 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
  89 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
  90
  91 struct rpc_context *nfs_get_rpc_context(struct nfs_context *nfs);
  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);