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 #define RPC_CONTEXT_MAGIC 0xc6e46435
  27
  28 struct rpc_context {
  29         uint32_t magic;
  30         int fd;
  31         int is_connected;
  32
  33         char *error_string;
  34
  35         rpc_cb connect_cb;
  36         void *connect_data;
  37
  38         AUTH *auth;
  39         unsigned long xid;
  40
  41        /* buffer used for encoding RPC PDU */
  42        char *encodebuf;
  43        int encodebuflen;
  44
  45        struct rpc_pdu *outqueue;
  46        struct sockaddr_storage udp_src;
  47        struct rpc_pdu *waitpdu;
  48
  49        int inpos;
  50        int insize;
  51        char *inbuf;
  52
  53        /* special fields for UDP, which can sometimes be BROADCASTed */
  54        int is_udp;
  55        struct sockaddr *udp_dest;
  56        int is_broadcast;
  57
  58        /* track the address we connect to so we can auto-reconnect on session failure */
  59        struct sockaddr_storage s;
  60        int auto_reconnect;
  61
  62         /* fragment reassembly */
  63         struct rpc_fragment *fragments;
  64 };
  65
  66 struct rpc_pdu {
  67         struct rpc_pdu *next;
  68
  69         unsigned long xid;
  70         XDR xdr;
  71
  72         int written;
  73         struct rpc_data outdata;
  74
  75         rpc_cb cb;
  76         void *private_data;
  77
  78         /* function to decode the xdr reply data and buffer to decode into */
  79         xdrproc_t xdr_decode_fn;
  80         caddr_t xdr_decode_buf;
  81         int xdr_decode_bufsize;
  82 };
  83
  84 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);
  85 void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  86 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu);
  87 int rpc_get_pdu_size(char *buf);
  88 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size);
  89 void rpc_error_all_pdus(struct rpc_context *rpc, char *error);
  90
  91 void rpc_set_error(struct rpc_context *rpc, char *error_string, ...);
  92 void nfs_set_error(struct nfs_context *nfs, char *error_string, ...);
  93
  94 const char *nfs_get_server(struct nfs_context *nfs);
  95 const char *nfs_get_export(struct nfs_context *nfs);
  96
  97 /* we dont want to expose UDP to normal applications/users  this is private to libnfs to use exclusively for broadcast RPC */
  98 int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port);
  99 int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast);
 100 struct rpc_context *rpc_init_udp_context(void);
 101 struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc);
 102
 103 void rpc_set_autoreconnect(struct rpc_context *rpc);
 104 void rpc_unset_autoreconnect(struct rpc_context *rpc);
 105
 106 int rpc_add_fragment(struct rpc_context *rpc, char *data, uint64_t size);
 107 void rpc_free_all_fragments(struct rpc_context *rpc);
 108
 109 const struct nfs_fh3 *nfs_get_rootfh(struct nfs_context *nfs);