436 lines
9.7 KiB
C
436 lines
9.7 KiB
C
/*
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Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef AROS
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#include "aros_compat.h"
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#endif
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#ifdef PS2_EE
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#include "ps2_compat.h"
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#endif
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#ifdef PS3_PPU
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#include "ps3_compat.h"
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#endif
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#ifdef WIN32
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#include <win32/win32_compat.h>
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#endif
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <time.h>
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#include "slist.h"
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#include "libnfs-zdr.h"
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#include "libnfs.h"
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#include "libnfs-raw.h"
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#include "libnfs-private.h"
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uint64_t rpc_current_time(void)
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{
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec tp;
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clock_gettime(CLOCK_MONOTONIC_COARSE, &tp);
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return (uint64_t)tp.tv_sec * 1000 + tp.tv_nsec / 1000000;
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#else
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return (uint64_t)time(NULL) * 1000;
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#endif
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}
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struct rpc_context *rpc_init_context(void)
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{
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struct rpc_context *rpc;
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static uint32_t salt = 0;
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unsigned int i;
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rpc = malloc(sizeof(struct rpc_context));
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if (rpc == NULL) {
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return NULL;
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}
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memset(rpc, 0, sizeof(struct rpc_context));
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rpc->magic = RPC_CONTEXT_MAGIC;
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rpc->auth = authunix_create_default();
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if (rpc->auth == NULL) {
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free(rpc);
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return NULL;
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}
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// Add PID to rpc->xid for easier debugging, making sure to cast
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// pid to 32-bit type to avoid invalid left-shifts.
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rpc->xid = salt + (uint32_t)rpc_current_time() + ((uint32_t)getpid() << 16);
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salt += 0x01000000;
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rpc->fd = -1;
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rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
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rpc->pagecache_ttl = NFS_PAGECACHE_DEFAULT_TTL;
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#if defined(WIN32) || defined(ANDROID) || defined(PS3_PPU)
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rpc->uid = 65534;
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rpc->gid = 65534;
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#else
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rpc->uid = getuid();
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rpc->gid = getgid();
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#endif
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rpc_reset_queue(&rpc->outqueue);
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for (i = 0; i < HASHES; i++)
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rpc_reset_queue(&rpc->waitpdu[i]);
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/* Default is no timeout */
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rpc->timeout = -1;
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return rpc;
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}
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struct rpc_context *rpc_init_server_context(int s)
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{
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struct rpc_context *rpc;
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rpc = malloc(sizeof(struct rpc_context));
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if (rpc == NULL) {
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return NULL;
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}
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memset(rpc, 0, sizeof(struct rpc_context));
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rpc->magic = RPC_CONTEXT_MAGIC;
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rpc->is_server_context = 1;
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rpc->fd = s;
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rpc->is_connected = 1;
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rpc->is_udp = rpc_is_udp_socket(rpc);
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rpc_reset_queue(&rpc->outqueue);
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return rpc;
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}
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static uint32_t round_to_power_of_two(uint32_t x) {
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uint32_t power = 1;
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while (power < x) {
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power <<= 1;
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}
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return power;
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}
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void rpc_set_pagecache(struct rpc_context *rpc, uint32_t v)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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v = MAX(rpc->pagecache, round_to_power_of_two(v));
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RPC_LOG(rpc, 2, "pagecache set to %d pages of size %d", v, NFS_BLKSIZE);
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rpc->pagecache = v;
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}
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void rpc_set_pagecache_ttl(struct rpc_context *rpc, uint32_t v) {
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if (v) {
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RPC_LOG(rpc, 2, "set pagecache ttl to %d seconds\n", v);
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} else {
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RPC_LOG(rpc, 2, "set pagecache ttl to infinite");
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}
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rpc->pagecache_ttl = v;
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}
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void rpc_set_readahead(struct rpc_context *rpc, uint32_t v)
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{
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uint32_t min_pagecache;
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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if (v) {
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v = MAX(NFS_BLKSIZE, round_to_power_of_two(v));
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}
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RPC_LOG(rpc, 2, "readahead set to %d byte", v);
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rpc->readahead = v;
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min_pagecache = (2 * v) / NFS_BLKSIZE;
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if (rpc->pagecache < min_pagecache) {
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/* current pagecache implementation needs a pagecache bigger
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* than the readahead size to avoid collisions */
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rpc_set_pagecache(rpc, min_pagecache);
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}
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}
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#ifdef HAVE_SO_BINDTODEVICE
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void rpc_set_interface(struct rpc_context *rpc, const char *ifname)
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{
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/*
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* This only copies the interface information into the RPC
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* structure. It doesn't stop whatever interface is being used. The
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* connection needs to be restarted for that happen. In other words,
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* set this before you connect.
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*/
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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if (ifname) {
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/*
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* Allow at one-less character just-in-case IFNAMSIZ for
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* the defined platform does not include the NUL-terminator.
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*/
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strncpy(rpc->ifname, ifname, sizeof(rpc->ifname) - 1);
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}
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}
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#endif
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void rpc_set_debug(struct rpc_context *rpc, int level)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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rpc->debug = level;
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}
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struct rpc_context *rpc_init_udp_context(void)
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{
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struct rpc_context *rpc;
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rpc = rpc_init_context();
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if (rpc != NULL) {
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rpc->is_udp = 1;
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}
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return rpc;
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}
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void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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if (rpc->auth != NULL) {
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auth_destroy(rpc->auth);
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}
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rpc->auth = auth;
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}
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static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
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if (uid != rpc->uid || gid != rpc->gid) {
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struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
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if (auth != NULL) {
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rpc_set_auth(rpc, auth);
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rpc->uid = uid;
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rpc->gid = gid;
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}
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}
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}
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void rpc_set_uid(struct rpc_context *rpc, int uid) {
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rpc_set_uid_gid(rpc, uid, rpc->gid);
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}
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void rpc_set_gid(struct rpc_context *rpc, int gid) {
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rpc_set_uid_gid(rpc, rpc->uid, gid);
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}
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void rpc_set_error(struct rpc_context *rpc, const char *error_string, ...)
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{
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va_list ap;
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char *old_error_string = rpc->error_string;
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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va_start(ap, error_string);
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rpc->error_string = malloc(1024);
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vsnprintf(rpc->error_string, 1024, error_string, ap);
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va_end(ap);
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RPC_LOG(rpc, 1, "error: %s", rpc->error_string);
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if (old_error_string != NULL) {
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free(old_error_string);
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}
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}
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char *rpc_get_error(struct rpc_context *rpc)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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return rpc->error_string ? rpc->error_string : "";
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}
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static void rpc_purge_all_pdus(struct rpc_context *rpc, int status, const char *error)
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{
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struct rpc_queue outqueue;
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struct rpc_pdu *pdu;
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int i;
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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/* Remove all entries from each queue before cancellation to prevent
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* the callbacks manipulating entries that are about to be removed.
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*
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* This code assumes that the callbacks will not enqueue any new
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* pdus when called.
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*/
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outqueue = rpc->outqueue;
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rpc_reset_queue(&rpc->outqueue);
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while ((pdu = outqueue.head) != NULL) {
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outqueue.head = pdu->next;
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pdu->next = NULL;
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pdu->cb(rpc, status, (void *) error, pdu->private_data);
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rpc_free_pdu(rpc, pdu);
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}
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for (i = 0; i < HASHES; i++) {
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struct rpc_queue waitqueue = rpc->waitpdu[i];
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rpc_reset_queue(&rpc->waitpdu[i]);
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while((pdu = waitqueue.head) != NULL) {
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waitqueue.head = pdu->next;
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pdu->next = NULL;
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pdu->cb(rpc, status, (void *) error, pdu->private_data);
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rpc_free_pdu(rpc, pdu);
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}
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}
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assert(!rpc->outqueue.head);
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for (i = 0; i < HASHES; i++)
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assert(!rpc->waitpdu[i].head);
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}
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void rpc_error_all_pdus(struct rpc_context *rpc, const char *error)
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{
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rpc_purge_all_pdus(rpc, RPC_STATUS_ERROR, error);
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}
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static void rpc_free_fragment(struct rpc_fragment *fragment)
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{
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if (fragment->data != NULL) {
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free(fragment->data);
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}
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free(fragment);
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}
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void rpc_free_all_fragments(struct rpc_context *rpc)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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while (rpc->fragments != NULL) {
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struct rpc_fragment *fragment = rpc->fragments;
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rpc->fragments = fragment->next;
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rpc_free_fragment(fragment);
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}
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}
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int rpc_add_fragment(struct rpc_context *rpc, char *data, uint32_t size)
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{
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struct rpc_fragment *fragment;
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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fragment = malloc(sizeof(struct rpc_fragment));
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if (fragment == NULL) {
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return -1;
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}
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fragment->size = size;
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fragment->data = malloc(fragment->size);
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if(fragment->data == NULL) {
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free(fragment);
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return -1;
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}
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memcpy(fragment->data, data, fragment->size);
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LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
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return 0;
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}
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void rpc_destroy_context(struct rpc_context *rpc)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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rpc_purge_all_pdus(rpc, RPC_STATUS_CANCEL, NULL);
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rpc_free_all_fragments(rpc);
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if (rpc->auth) {
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auth_destroy(rpc->auth);
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rpc->auth =NULL;
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}
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if (rpc->fd != -1) {
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close(rpc->fd);
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}
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if (rpc->error_string != NULL) {
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free(rpc->error_string);
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rpc->error_string = NULL;
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}
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free(rpc->inbuf);
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rpc->inbuf = NULL;
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rpc->magic = 0;
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free(rpc);
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}
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void rpc_set_timeout(struct rpc_context *rpc, int timeout)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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rpc->timeout = timeout;
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}
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int rpc_get_timeout(struct rpc_context *rpc)
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{
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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return rpc->timeout;
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}
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int rpc_register_service(struct rpc_context *rpc, int program, int version,
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struct service_proc *procs, int num_procs)
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{
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struct rpc_endpoint *endpoint;
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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if (!rpc->is_server_context) {
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rpc_set_error(rpc, "Not a server context.");
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return -1;
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}
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endpoint = malloc(sizeof(*endpoint));
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if (endpoint == NULL) {
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rpc_set_error(rpc, "Out of memory: Failed to allocate endpoint "
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"structure");
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return -1;
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}
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endpoint->program = program;
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endpoint->version = version;
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endpoint->procs = procs;
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endpoint->num_procs = num_procs;
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endpoint->next = rpc->endpoints;
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rpc->endpoints = endpoint;
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return 0;
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}
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