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libnfs/lib/init.c

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/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
/*
Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef AROS
#include "aros_compat.h"
#endif
#ifdef PS2_EE
#include "ps2_compat.h"
#endif
#ifdef PS3_PPU
#include "ps3_compat.h"
#endif
#ifdef WIN32
#include <win32/win32_compat.h>
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <time.h>
#include "slist.h"
#include "libnfs-zdr.h"
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-private.h"
uint64_t rpc_current_time(void)
{
#ifdef HAVE_CLOCK_GETTIME
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC_COARSE, &tp);
return (uint64_t)tp.tv_sec * 1000 + tp.tv_nsec / 1000000;
#else
return (uint64_t)time(NULL) * 1000;
#endif
}
struct rpc_context *rpc_init_context(void)
{
struct rpc_context *rpc;
static uint32_t salt = 0;
unsigned int i;
rpc = malloc(sizeof(struct rpc_context));
if (rpc == NULL) {
return NULL;
}
memset(rpc, 0, sizeof(struct rpc_context));
rpc->magic = RPC_CONTEXT_MAGIC;
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_init(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
rpc->auth = authunix_create_default();
if (rpc->auth == NULL) {
free(rpc);
return NULL;
}
// Add PID to rpc->xid for easier debugging, making sure to cast
// pid to 32-bit type to avoid invalid left-shifts.
rpc->xid = salt + (uint32_t)rpc_current_time() + ((uint32_t)getpid() << 16);
salt += 0x01000000;
rpc->fd = -1;
rpc->tcp_syncnt = RPC_PARAM_UNDEFINED;
rpc->pagecache_ttl = NFS_PAGECACHE_DEFAULT_TTL;
#if defined(WIN32) || defined(ANDROID) || defined(PS3_PPU)
rpc->uid = 65534;
rpc->gid = 65534;
#else
rpc->uid = getuid();
rpc->gid = getgid();
#endif
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_lock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
rpc_reset_queue(&rpc->outqueue);
for (i = 0; i < HASHES; i++)
rpc_reset_queue(&rpc->waitpdu[i]);
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_unlock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
/* Default is no timeout */
rpc->timeout = -1;
return rpc;
}
struct rpc_context *rpc_init_server_context(int s)
{
struct rpc_context *rpc;
rpc = malloc(sizeof(struct rpc_context));
if (rpc == NULL) {
return NULL;
}
memset(rpc, 0, sizeof(struct rpc_context));
rpc->magic = RPC_CONTEXT_MAGIC;
rpc->is_server_context = 1;
rpc->fd = s;
rpc->is_connected = 1;
rpc->is_udp = rpc_is_udp_socket(rpc);
rpc_reset_queue(&rpc->outqueue);
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_init(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
return rpc;
}
static uint32_t round_to_power_of_two(uint32_t x) {
uint32_t power = 1;
while (power < x) {
power <<= 1;
}
return power;
}
void rpc_set_pagecache(struct rpc_context *rpc, uint32_t v)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
v = MAX(rpc->pagecache, round_to_power_of_two(v));
RPC_LOG(rpc, 2, "pagecache set to %d pages of size %d", v, NFS_BLKSIZE);
rpc->pagecache = v;
}
void rpc_set_pagecache_ttl(struct rpc_context *rpc, uint32_t v) {
if (v) {
RPC_LOG(rpc, 2, "set pagecache ttl to %d seconds\n", v);
} else {
RPC_LOG(rpc, 2, "set pagecache ttl to infinite");
}
rpc->pagecache_ttl = v;
}
void rpc_set_readahead(struct rpc_context *rpc, uint32_t v)
{
uint32_t min_pagecache;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (v) {
v = MAX(NFS_BLKSIZE, round_to_power_of_two(v));
}
RPC_LOG(rpc, 2, "readahead set to %d byte", v);
rpc->readahead = v;
min_pagecache = (2 * v) / NFS_BLKSIZE;
if (rpc->pagecache < min_pagecache) {
/* current pagecache implementation needs a pagecache bigger
* than the readahead size to avoid collisions */
rpc_set_pagecache(rpc, min_pagecache);
}
}
#ifdef HAVE_SO_BINDTODEVICE
void rpc_set_interface(struct rpc_context *rpc, const char *ifname)
{
/*
* This only copies the interface information into the RPC
* structure. It doesn't stop whatever interface is being used. The
* connection needs to be restarted for that happen. In other words,
* set this before you connect.
*/
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (ifname) {
/*
* Allow at one-less character just-in-case IFNAMSIZ for
* the defined platform does not include the NUL-terminator.
*/
strncpy(rpc->ifname, ifname, sizeof(rpc->ifname) - 1);
}
}
#endif
void rpc_set_debug(struct rpc_context *rpc, int level)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
rpc->debug = level;
}
struct rpc_context *rpc_init_udp_context(void)
{
struct rpc_context *rpc;
rpc = rpc_init_context();
if (rpc != NULL) {
rpc->is_udp = 1;
}
return rpc;
}
void rpc_set_auth(struct rpc_context *rpc, struct AUTH *auth)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (rpc->auth != NULL) {
auth_destroy(rpc->auth);
}
rpc->auth = auth;
}
static void rpc_set_uid_gid(struct rpc_context *rpc, int uid, int gid) {
if (uid != rpc->uid || gid != rpc->gid) {
struct AUTH *auth = libnfs_authunix_create("libnfs", uid, gid, 0, NULL);
if (auth != NULL) {
rpc_set_auth(rpc, auth);
rpc->uid = uid;
rpc->gid = gid;
}
}
}
void rpc_set_uid(struct rpc_context *rpc, int uid) {
rpc_set_uid_gid(rpc, uid, rpc->gid);
}
void rpc_set_gid(struct rpc_context *rpc, int gid) {
rpc_set_uid_gid(rpc, rpc->uid, gid);
}
void rpc_set_error(struct rpc_context *rpc, const char *error_string, ...)
{
va_list ap;
char *old_error_string;
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_lock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
old_error_string = rpc->error_string;
va_start(ap, error_string);
rpc->error_string = malloc(1024);
vsnprintf(rpc->error_string, 1024, error_string, ap);
va_end(ap);
RPC_LOG(rpc, 1, "error: %s", rpc->error_string);
if (old_error_string != NULL) {
free(old_error_string);
}
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_unlock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
}
char *rpc_get_error(struct rpc_context *rpc)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
return rpc->error_string ? rpc->error_string : "";
}
static void rpc_purge_all_pdus(struct rpc_context *rpc, int status, const char *error)
{
struct rpc_queue outqueue;
struct rpc_pdu *pdu;
int i;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
/* Remove all entries from each queue before cancellation to prevent
* the callbacks manipulating entries that are about to be removed.
*
* This code assumes that the callbacks will not enqueue any new
* pdus when called.
*/
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_lock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
outqueue = rpc->outqueue;
rpc_reset_queue(&rpc->outqueue);
while ((pdu = outqueue.head) != NULL) {
outqueue.head = pdu->next;
pdu->next = NULL;
pdu->cb(rpc, status, (void *) error, pdu->private_data);
rpc_free_pdu(rpc, pdu);
}
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_unlock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
for (i = 0; i < HASHES; i++) {
struct rpc_queue waitqueue;
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_lock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
waitqueue = rpc->waitpdu[i];
rpc_reset_queue(&rpc->waitpdu[i]);
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_unlock(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
while((pdu = waitqueue.head) != NULL) {
waitqueue.head = pdu->next;
pdu->next = NULL;
pdu->cb(rpc, status, (void *) error, pdu->private_data);
rpc_free_pdu(rpc, pdu);
}
}
assert(!rpc->outqueue.head);
}
void rpc_error_all_pdus(struct rpc_context *rpc, const char *error)
{
rpc_purge_all_pdus(rpc, RPC_STATUS_ERROR, error);
}
static void rpc_free_fragment(struct rpc_fragment *fragment)
{
if (fragment->data != NULL) {
free(fragment->data);
}
free(fragment);
}
void rpc_free_all_fragments(struct rpc_context *rpc)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
while (rpc->fragments != NULL) {
struct rpc_fragment *fragment = rpc->fragments;
rpc->fragments = fragment->next;
rpc_free_fragment(fragment);
}
}
int rpc_add_fragment(struct rpc_context *rpc, char *data, uint32_t size)
{
struct rpc_fragment *fragment;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
fragment = malloc(sizeof(struct rpc_fragment));
if (fragment == NULL) {
return -1;
}
fragment->size = size;
fragment->data = malloc(fragment->size);
if(fragment->data == NULL) {
free(fragment);
return -1;
}
memcpy(fragment->data, data, fragment->size);
LIBNFS_LIST_ADD_END(&rpc->fragments, fragment);
return 0;
}
void rpc_destroy_context(struct rpc_context *rpc)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
rpc_purge_all_pdus(rpc, RPC_STATUS_CANCEL, NULL);
rpc_free_all_fragments(rpc);
if (rpc->auth) {
auth_destroy(rpc->auth);
rpc->auth =NULL;
}
if (rpc->fd != -1) {
close(rpc->fd);
}
if (rpc->error_string != NULL) {
free(rpc->error_string);
rpc->error_string = NULL;
}
free(rpc->inbuf);
rpc->inbuf = NULL;
rpc->magic = 0;
#ifdef HAVE_MULTITHREADING
nfs_mt_mutex_destroy(&rpc->rpc_mutex);
#endif /* HAVE_MULTITHREADING */
free(rpc);
}
void rpc_set_timeout(struct rpc_context *rpc, int timeout)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
rpc->timeout = timeout;
}
int rpc_get_timeout(struct rpc_context *rpc)
{
assert(rpc->magic == RPC_CONTEXT_MAGIC);
return rpc->timeout;
}
int rpc_register_service(struct rpc_context *rpc, int program, int version,
struct service_proc *procs, int num_procs)
{
struct rpc_endpoint *endpoint;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (!rpc->is_server_context) {
rpc_set_error(rpc, "Not a server context.");
return -1;
}
endpoint = malloc(sizeof(*endpoint));
if (endpoint == NULL) {
rpc_set_error(rpc, "Out of memory: Failed to allocate endpoint "
"structure");
return -1;
}
endpoint->program = program;
endpoint->version = version;
endpoint->procs = procs;
endpoint->num_procs = num_procs;
endpoint->next = rpc->endpoints;
rpc->endpoints = endpoint;
return 0;
}
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