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libnfs.c
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libnfs.c
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/*
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/>.
*/
/*
* High level api to nfs filesystems
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef AROS
#include "aros_compat.h"
#endif
#ifdef WIN32
#include "win32_compat.h"
#endif
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef ANDROID
#define statvfs statfs
#endif
#define _GNU_SOURCE
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "libnfs-zdr.h"
#include "slist.h"
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-raw-mount.h"
#include "libnfs-raw-nfs.h"
#include "libnfs-raw-portmap.h"
#include "libnfs-private.h"
#define MAX_DIR_CACHE 128
struct nfsdir {
struct nfs_fh3 fh;
fattr3 attr;
struct nfsdir *next;
struct nfsdirent *entries;
struct nfsdirent *current;
};
struct nfs_readahead {
uint64_t fh_offset;
uint64_t last_offset;
uint64_t buf_offset;
uint64_t buf_count;
time_t buf_ts;
void *buf;
uint32_t cur_ra;
};
struct nfsfh {
struct nfs_fh3 fh;
int is_sync;
int is_append;
uint64_t offset;
struct nfs_readahead ra;
};
struct nfs_context {
struct rpc_context *rpc;
char *server;
char *export;
struct nfs_fh3 rootfh;
uint64_t readmax;
uint64_t writemax;
char *cwd;
struct nfsdir *dircache;
};
void nfs_free_nfsdir(struct nfsdir *nfsdir)
{
while (nfsdir->entries) {
struct nfsdirent *dirent = nfsdir->entries->next;
if (nfsdir->entries->name != NULL) {
free(nfsdir->entries->name);
}
free(nfsdir->entries);
nfsdir->entries = dirent;
}
free(nfsdir->fh.data.data_val);
free(nfsdir);
}
static void nfs_dircache_add(struct nfs_context *nfs, struct nfsdir *nfsdir)
{
int i;
LIBNFS_LIST_ADD(&nfs->dircache, nfsdir);
for (nfsdir = nfs->dircache, i = 0; nfsdir; nfsdir = nfsdir->next, i++) {
if (i > MAX_DIR_CACHE) {
LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
nfs_free_nfsdir(nfsdir);
break;
}
}
}
static struct nfsdir *nfs_dircache_find(struct nfs_context *nfs, struct nfs_fh3 *fh)
{
struct nfsdir *nfsdir;
for (nfsdir = nfs->dircache; nfsdir; nfsdir = nfsdir->next) {
if (nfsdir->fh.data.data_len == fh->data.data_len &&
!memcmp(nfsdir->fh.data.data_val, fh->data.data_val, fh->data.data_len)) {
LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
return nfsdir;
}
}
return NULL;
}
struct nfs_cb_data;
typedef int (*continue_func)(struct nfs_context *nfs, fattr3 *attr,
struct nfs_cb_data *data);
struct nfs_cb_data {
struct nfs_context *nfs;
struct nfsfh *nfsfh;
char *saved_path, *path;
nfs_cb cb;
void *private_data;
continue_func continue_cb;
void *continue_data;
void (*free_continue_data)(void *);
int continue_int;
struct nfs_fh3 fh;
/* for multi-read/write calls. */
int error;
int cancel;
int oom;
int num_calls;
uint64_t offset, count, max_offset, org_offset, org_count;
char *buffer;
char *usrbuf;
};
struct nfs_mcb_data {
struct nfs_cb_data *data;
uint64_t offset;
uint64_t count;
int update_pos;
};
static int nfs_lookup_path_async_internal(struct nfs_context *nfs, fattr3 *attr, struct nfs_cb_data *data, struct nfs_fh3 *fh);
void nfs_set_auth(struct nfs_context *nfs, struct AUTH *auth)
{
rpc_set_auth(nfs->rpc, auth);
}
int nfs_get_fd(struct nfs_context *nfs)
{
return rpc_get_fd(nfs->rpc);
}
int nfs_queue_length(struct nfs_context *nfs)
{
return rpc_queue_length(nfs->rpc);
}
int nfs_which_events(struct nfs_context *nfs)
{
return rpc_which_events(nfs->rpc);
}
int nfs_service(struct nfs_context *nfs, int revents)
{
return rpc_service(nfs->rpc, revents);
}
char *nfs_get_error(struct nfs_context *nfs)
{
return rpc_get_error(nfs->rpc);
};
static int nfs_set_context_args(struct nfs_context *nfs, char *arg, char *val)
{
if (!strcmp(arg, "tcp-syncnt")) {
rpc_set_tcp_syncnt(nfs_get_rpc_context(nfs), atoi(val));
} else if (!strcmp(arg, "uid")) {
rpc_set_uid(nfs_get_rpc_context(nfs), atoi(val));
} else if (!strcmp(arg, "gid")) {
rpc_set_gid(nfs_get_rpc_context(nfs), atoi(val));
} else if (!strcmp(arg, "readahaed")) {
rpc_set_readahead(nfs_get_rpc_context(nfs), atoi(val));
}
return 0;
}
static struct nfs_url *nfs_parse_url(struct nfs_context *nfs, const char *url, int dir, int incomplete)
{
struct nfs_url *urls;
char *strp, *flagsp, *strp2;
if (strncmp(url, "nfs://", 6)) {
rpc_set_error(nfs->rpc, "Invalid URL specified");
return NULL;
}
urls = malloc(sizeof(struct nfs_url));
if (urls == NULL) {
rpc_set_error(nfs->rpc, "Out of memory");
return NULL;
}
memset(urls, 0x00, sizeof(struct nfs_url));
urls->server = strdup(url + 6);
if (urls->server == NULL) {
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Out of memory");
return NULL;
}
if (urls->server[0] == '/' || urls->server[0] == '\0' ||
urls->server[0] == '?') {
if (incomplete) {
flagsp = strchr(urls->server, '?');
goto flags;
}
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Invalid server string");
return NULL;
}
strp = strchr(urls->server, '/');
if (strp == NULL) {
if (incomplete) {
flagsp = strchr(urls->server, '?');
goto flags;
}
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Incomplete or invalid URL specified.");
return NULL;
}
urls->path = strdup(strp);
if (urls->path == NULL) {
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Out of memory");
return NULL;
}
*strp = 0;
if (dir) {
flagsp = strchr(urls->path, '?');
goto flags;
}
strp = strrchr(urls->path, '/');
if (strp == NULL) {
if (incomplete) {
flagsp = strchr(urls->path, '?');
goto flags;
}
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Incomplete or invalid URL specified.");
return NULL;
}
urls->file = strdup(strp);
if (urls->path == NULL) {
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Out of memory");
return NULL;
}
*strp = 0;
flagsp = strchr(urls->file, '?');
flags:
if (flagsp) {
*flagsp = 0;
}
if (urls->file && !strlen(urls->file)) {
free(urls->file);
urls->file = NULL;
if (!incomplete) {
nfs_destroy_url(urls);
rpc_set_error(nfs->rpc, "Incomplete or invalid URL specified.");
return NULL;
}
}
while (flagsp != NULL && *(flagsp+1) != 0) {
strp = flagsp + 1;
flagsp = strchr(strp, '&');
if (flagsp) {
*flagsp = 0;
}
strp2 = strchr(strp, '=');
if (strp2) {
*strp2 = 0;
strp2++;
nfs_set_context_args(nfs, strp, strp2);
}
}
if (urls->server && strlen(urls->server) <= 1) {
free(urls->server);
urls->server = NULL;
}
return urls;
}
struct nfs_url *nfs_parse_url_full(struct nfs_context *nfs, const char *url)
{
return nfs_parse_url(nfs, url, 0, 0);
}
struct nfs_url *nfs_parse_url_dir(struct nfs_context *nfs, const char *url)
{
return nfs_parse_url(nfs, url, 1, 0);
}
struct nfs_url *nfs_parse_url_incomplete(struct nfs_context *nfs, const char *url)
{
return nfs_parse_url(nfs, url, 0, 1);
}
void nfs_destroy_url(struct nfs_url *url)
{
if (url) {
free(url->server);
free(url->path);
free(url->file);
}
free(url);
}
struct nfs_context *nfs_init_context(void)
{
struct nfs_context *nfs;
nfs = malloc(sizeof(struct nfs_context));
if (nfs == NULL) {
return NULL;
}
memset(nfs, 0, sizeof(struct nfs_context));
nfs->rpc = rpc_init_context();
if (nfs->rpc == NULL) {
free(nfs);
return NULL;
}
nfs->cwd = strdup("/");
return nfs;
}
void nfs_destroy_context(struct nfs_context *nfs)
{
rpc_destroy_context(nfs->rpc);
nfs->rpc = NULL;
if (nfs->server) {
free(nfs->server);
nfs->server = NULL;
}
if (nfs->export) {
free(nfs->export);
nfs->export = NULL;
}
if (nfs->cwd) {
free(nfs->cwd);
nfs->cwd = NULL;
}
if (nfs->rootfh.data.data_val != NULL) {
free(nfs->rootfh.data.data_val);
nfs->rootfh.data.data_val = NULL;
}
while (nfs->dircache) {
struct nfsdir *nfsdir = nfs->dircache;
LIBNFS_LIST_REMOVE(&nfs->dircache, nfsdir);
nfs_free_nfsdir(nfsdir);
}
free(nfs);
}
struct rpc_cb_data {
char *server;
uint32_t program;
uint32_t version;
rpc_cb cb;
void *private_data;
};
void free_rpc_cb_data(struct rpc_cb_data *data)
{
free(data->server);
data->server = NULL;
free(data);
}
static void rpc_connect_program_5_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct rpc_cb_data *data = private_data;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
/* Dont want any more callbacks even if the socket is closed */
rpc->connect_cb = NULL;
if (status == RPC_STATUS_ERROR) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(rpc, status, "Command was cancelled", data->private_data);
free_rpc_cb_data(data);
return;
}
data->cb(rpc, status, NULL, data->private_data);
free_rpc_cb_data(data);
}
static void rpc_connect_program_4_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct rpc_cb_data *data = private_data;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
/* Dont want any more callbacks even if the socket is closed */
rpc->connect_cb = NULL;
if (status == RPC_STATUS_ERROR) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(rpc, status, "Command was cancelled", data->private_data);
free_rpc_cb_data(data);
return;
}
switch (data->program) {
case MOUNT_PROGRAM:
if (rpc_mount3_null_async(rpc, rpc_connect_program_5_cb,
data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
return;
case NFS_PROGRAM:
if (rpc_nfs3_null_async(rpc, rpc_connect_program_5_cb,
data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
return;
}
data->cb(rpc, status, NULL, data->private_data);
free_rpc_cb_data(data);
}
static void rpc_connect_program_3_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct rpc_cb_data *data = private_data;
struct pmap3_string_result *gar;
uint32_t rpc_port = 0;
unsigned char *ptr;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(rpc, status, "Command was cancelled", data->private_data);
free_rpc_cb_data(data);
return;
}
switch (rpc->s.ss_family) {
case AF_INET:
rpc_port = *(uint32_t *)command_data;
break;
case AF_INET6:
/* ouch. portmapper and ipv6 are not great */
gar = command_data;
if (gar->addr == NULL) {
break;
}
ptr = strrchr(gar->addr, '.');
if (ptr == NULL) {
break;
}
rpc_port = atoi(ptr + 1);
*ptr = 0;
ptr = strrchr(gar->addr, '.');
if (ptr == NULL) {
break;
}
rpc_port += 256 * atoi(ptr + 1);
break;
}
if (rpc_port == 0) {
rpc_set_error(rpc, "RPC error. Program is not available on %s", data->server);
data->cb(rpc, RPC_STATUS_ERROR, rpc_get_error(rpc), data->private_data);
free_rpc_cb_data(data);
return;
}
rpc_disconnect(rpc, "normal disconnect");
if (rpc_connect_async(rpc, data->server, rpc_port, rpc_connect_program_4_cb, data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
}
static void rpc_connect_program_2_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct rpc_cb_data *data = private_data;
struct pmap3_mapping map;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(rpc, status, "Command was cancelled", data->private_data);
free_rpc_cb_data(data);
return;
}
switch (rpc->s.ss_family) {
case AF_INET:
if (rpc_pmap2_getport_async(rpc, data->program, data->version, IPPROTO_TCP, rpc_connect_program_3_cb, private_data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
break;
case AF_INET6:
map.prog=data->program;
map.vers=data->version;
map.netid="";
map.addr="";
map.owner="";
if (rpc_pmap3_getaddr_async(rpc, &map, rpc_connect_program_3_cb, private_data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
break;
}
}
static void rpc_connect_program_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct rpc_cb_data *data = private_data;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
/* Dont want any more callbacks even if the socket is closed */
rpc->connect_cb = NULL;
if (status == RPC_STATUS_ERROR) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(rpc, status, "Command was cancelled", data->private_data);
free_rpc_cb_data(data);
return;
}
switch (rpc->s.ss_family) {
case AF_INET:
if (rpc_pmap2_null_async(rpc, rpc_connect_program_2_cb, data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
break;
case AF_INET6:
if (rpc_pmap3_null_async(rpc, rpc_connect_program_2_cb, data) != 0) {
data->cb(rpc, status, command_data, data->private_data);
free_rpc_cb_data(data);
return;
}
break;
}
}
int rpc_connect_program_async(struct rpc_context *rpc, const char *server, int program, int version, rpc_cb cb, void *private_data)
{
struct rpc_cb_data *data;
data = malloc(sizeof(struct rpc_cb_data));
if (data == NULL) {
return -1;
}
memset(data, 0, sizeof(struct rpc_cb_data));
data->server = strdup(server);
data->program = program;
data->version = version;
data->cb = cb;
data->private_data = private_data;
if (rpc_connect_async(rpc, server, 111, rpc_connect_program_1_cb, data) != 0) {
rpc_set_error(rpc, "Failed to start connection");
free_rpc_cb_data(data);
return -1;
}
return 0;
}
static void free_nfs_cb_data(struct nfs_cb_data *data)
{
if (data->continue_data != NULL) {
assert(data->free_continue_data);
data->free_continue_data(data->continue_data);
}
free(data->saved_path);
free(data->fh.data.data_val);
free(data->buffer);
free(data);
}
static void nfs_mount_10_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
data->cb(0, nfs, NULL, data->private_data);
free_nfs_cb_data(data);
}
static void nfs_mount_9_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
FSINFO3res *res = command_data;
struct GETATTR3args args;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
nfs->readmax = res->FSINFO3res_u.resok.rtmax;
nfs->writemax = res->FSINFO3res_u.resok.wtmax;
memset(&args, 0, sizeof(GETATTR3args));
args.object = nfs->rootfh;
if (rpc_nfs3_getattr_async(rpc, nfs_mount_10_cb, &args, data) != 0) {
data->cb(-ENOMEM, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
}
static void nfs_mount_8_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
struct FSINFO3args args;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
args.fsroot = nfs->rootfh;
if (rpc_nfs3_fsinfo_async(rpc, nfs_mount_9_cb, &args, data) != 0) {
data->cb(-ENOMEM, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
}
static void nfs_mount_6_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
mountres3 *res;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
res = command_data;
if (res->fhs_status != MNT3_OK) {
rpc_set_error(rpc, "RPC error: Mount failed with error %s(%d) %s(%d)", mountstat3_to_str(res->fhs_status), res->fhs_status, strerror(-mountstat3_to_errno(res->fhs_status)), -mountstat3_to_errno(res->fhs_status));
data->cb(mountstat3_to_errno(res->fhs_status), nfs, rpc_get_error(rpc), data->private_data);
free_nfs_cb_data(data);
return;
}
nfs->rootfh.data.data_len = res->mountres3_u.mountinfo.fhandle.fhandle3_len;
nfs->rootfh.data.data_val = malloc(nfs->rootfh.data.data_len);
if (nfs->rootfh.data.data_val == NULL) {
rpc_set_error(rpc, "Out of memory. Could not allocate memory to store root filehandle");
data->cb(-ENOMEM, nfs, rpc_get_error(rpc), data->private_data);
free_nfs_cb_data(data);
return;
}
memcpy(nfs->rootfh.data.data_val, res->mountres3_u.mountinfo.fhandle.fhandle3_val, nfs->rootfh.data.data_len);
rpc_disconnect(rpc, "normal disconnect");
if (rpc_connect_program_async(nfs->rpc, nfs->server, NFS_PROGRAM, NFS_V3, nfs_mount_8_cb, data) != 0) {
data->cb(-ENOMEM, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
/* NFS TCP connections we want to autoreconnect after sessions are torn down (due to inactivity or error) */
rpc_set_autoreconnect(rpc);
}
static void nfs_mount_5_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
if (rpc_mount3_mnt_async(rpc, nfs_mount_6_cb, nfs->export, data) != 0) {
data->cb(-ENOMEM, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
}
/*
* Async call for mounting an nfs share and geting the root filehandle
*/
int nfs_mount_async(struct nfs_context *nfs, const char *server, const char *export, nfs_cb cb, void *private_data)
{
struct nfs_cb_data *data;
char *new_server, *new_export;
data = malloc(sizeof(struct nfs_cb_data));
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory. failed to allocate memory for nfs mount data");
return -1;
}
memset(data, 0, sizeof(struct nfs_cb_data));
new_server = strdup(server);
new_export = strdup(export);
if (nfs->server != NULL) {
free(nfs->server);
}
nfs->server = new_server;
if (nfs->export != NULL) {
free(nfs->export);
}
nfs->export = new_export;
data->nfs = nfs;
data->cb = cb;
data->private_data = private_data;
if (rpc_connect_program_async(nfs->rpc, server, MOUNT_PROGRAM, MOUNT_V3, nfs_mount_5_cb, data) != 0) {
rpc_set_error(nfs->rpc, "Failed to start connection");
free_nfs_cb_data(data);
return -1;
}
return 0;
}
/*
* Functions to first look up a path, component by component, and then finally call a specific function once
* the filehandle for the final component is found.
*/
static void nfs_lookup_path_1_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
LOOKUP3res *res;
fattr3 *attr;
assert(rpc->magic == RPC_CONTEXT_MAGIC);
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
if (status == RPC_STATUS_CANCEL) {
data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
free_nfs_cb_data(data);
return;
}
res = command_data;
if (res->status != NFS3_OK) {
rpc_set_error(nfs->rpc, "NFS: Lookup of %s failed with %s(%d)", data->saved_path, nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
data->cb(nfsstat3_to_errno(res->status), nfs, rpc_get_error(nfs->rpc), data->private_data);
free_nfs_cb_data(data);
return;
}
attr = res->LOOKUP3res_u.resok.obj_attributes.attributes_follow ?
&res->LOOKUP3res_u.resok.obj_attributes.post_op_attr_u.attributes :
NULL;
/* This function will always invoke the callback and cleanup
* for failures. So no need to check the return value.
*/
nfs_lookup_path_async_internal(nfs, attr, data, &res->LOOKUP3res_u.resok.object);
}
static int nfs_lookup_path_async_internal(struct nfs_context *nfs, fattr3 *attr _U_, struct nfs_cb_data *data, struct nfs_fh3 *fh)
{
char *path, *slash;
LOOKUP3args args;
while (*data->path == '/') {
data->path++;
}
path = data->path;
slash = strchr(path, '/');
if (slash != NULL) {
/* Clear slash so that path is a zero terminated string for
* the current path component. Set it back to '/' again later
* when we are finished referencing this component so that
* data->saved_path will still point to the full
* normalized path.
*/
*slash = 0;
data->path = slash+1;
} else {
while (*data->path != 0) {
data->path++;
}
}
if (*path == 0) {
data->fh.data.data_len = fh->data.data_len;
data->fh.data.data_val = malloc(data->fh.data.data_len);
if (data->fh.data.data_val == NULL) {
rpc_set_error(nfs->rpc, "Out of memory: Failed to allocate fh for %s", data->path);
data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
free_nfs_cb_data(data);
return -1;
}
memcpy(data->fh.data.data_val, fh->data.data_val, data->fh.data.data_len);
if (slash != NULL) {
*slash = '/';
}
data->continue_cb(nfs, attr, data);
return 0;
}
memset(&args, 0, sizeof(LOOKUP3args));
args.what.dir = *fh;
args.what.name = path;
if (rpc_nfs3_lookup_async(nfs->rpc, nfs_lookup_path_1_cb, &args, data) != 0) {
rpc_set_error(nfs->rpc, "RPC error: Failed to send lookup call for %s", data->path);
data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
free_nfs_cb_data(data);
return -1;
}
if (slash != NULL) {
*slash = '/';
}
return 0;
}
static int nfs_normalize_path(struct nfs_context *nfs, char *path)
{
char *str;
int len;