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|
/*
Unix SMB/CIFS implementation.
CIFS-on-CIFS NTVFS filesystem backend
Copyright (C) Andrew Tridgell 2003
Copyright (C) James J Myers 2003 <myersjj@samba.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
this implements a CIFS->CIFS NTVFS filesystem backend.
*/
#include "includes.h"
/* this is stored in ntvfs_private */
struct cvfs_private {
struct smbcli_tree *tree;
struct smbcli_transport *transport;
struct smbsrv_tcon *tcon;
const char *map_calls;
};
/* a structure used to pass information to an async handler */
struct async_info {
struct smbsrv_request *req;
void *parms;
};
/*
an idle function to cope with messages from the smbd client while
waiting for a reply from the server
this function won't be needed once all of the cifs backend
and the core of smbd is converted to use async calls
*/
static void idle_func(struct smbcli_transport *transport, void *p_private)
{
struct cvfs_private *private = p_private;
if (socket_pending(private->tcon->smb_conn->connection->event.fde->fd)) {
smbd_process_async(private->tcon->smb_conn);
}
}
/*
a handler for oplock break events from the server - these need to be passed
along to the client
*/
static BOOL oplock_handler(struct smbcli_transport *transport, uint16_t tid, uint16_t fnum, uint8_t level, void *p_private)
{
struct cvfs_private *private = p_private;
DEBUG(5,("vfs_cifs: sending oplock break level %d for fnum %d\n", level, fnum));
return req_send_oplock_break(private->tcon, fnum, level);
}
/*
a handler for read events on a connection to a backend server
*/
static void cifs_socket_handler(struct event_context *ev, struct fd_event *fde, time_t t, uint16_t flags)
{
struct cvfs_private *private = fde->private;
struct smbsrv_tcon *tcon = private->tcon;
DEBUG(5,("cifs_socket_handler event on fd %d\n", fde->fd));
if (!smbcli_transport_process(private->transport)) {
/* the connection to our server is dead */
close_cnum(tcon);
}
}
/*
connect to a share - used when a tree_connect operation comes in.
*/
static NTSTATUS cvfs_connect(struct smbsrv_request *req, const char *sharename)
{
struct smbsrv_tcon *tcon = req->tcon;
NTSTATUS status;
struct cvfs_private *private;
const char *map_calls;
const char *host, *user, *pass, *domain, *remote_share;
/* Here we need to determine which server to connect to.
* For now we use parametric options, type cifs.
* Later we will use security=server and auth_server.c.
*/
host = lp_parm_string(req->tcon->service, "cifs", "server");
user = lp_parm_string(req->tcon->service, "cifs", "user");
pass = lp_parm_string(req->tcon->service, "cifs", "password");
domain = lp_parm_string(req->tcon->service, "cifs", "domain");
remote_share = lp_parm_string(req->tcon->service, "cifs", "share");
if (!remote_share) {
remote_share = sharename;
}
if (!host || !user || !pass || !domain) {
DEBUG(1,("CIFS backend: You must supply server, user, password and domain\n"));
return NT_STATUS_INVALID_PARAMETER;
}
private = talloc(req->tcon, sizeof(struct cvfs_private));
if (!private) {
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(private);
req->tcon->ntvfs_private = (void *)private;
status = smbcli_tree_full_connection(&private->tree,
"vfs_cifs",
host,
0,
remote_share, "?????",
user, domain,
pass);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
private->transport = private->tree->session->transport;
private->tree->session->pid = SVAL(req->in.hdr, HDR_PID);
private->tcon = req->tcon;
tcon->fs_type = talloc_strdup(tcon, "NTFS");
tcon->dev_type = talloc_strdup(tcon, "A:");
map_calls = lp_parm_string(req->tcon->service, "cifs", "map calls");
if (map_calls) {
private->map_calls = talloc_strdup(tcon, map_calls);
}
/* if we are mapping trans2, then we need to give a trans2
pointer in the operations structure */
if (private->map_calls && in_list("trans2", private->map_calls, True)) {
struct ntvfs_ops *ops = talloc_memdup(tcon, tcon->ntvfs_ops,sizeof(*ops));
static NTSTATUS cvfs_trans2(struct smbsrv_request *,struct smb_trans2 *);
if (!ops) {
return NT_STATUS_NO_MEMORY;
}
ops->trans2 = cvfs_trans2;
tcon->ntvfs_ops = ops;
}
/* we need to receive oplock break requests from the server */
smbcli_oplock_handler(private->transport, oplock_handler, private);
smbcli_transport_idle_handler(private->transport, idle_func, 1, private);
private->transport->event.fde->handler = cifs_socket_handler;
private->transport->event.fde->private = private;
private->transport->event.ctx = event_context_merge(tcon->smb_conn->connection->event.ctx,
private->transport->event.ctx);
return NT_STATUS_OK;
}
/*
disconnect from a share
*/
static NTSTATUS cvfs_disconnect(struct smbsrv_tcon *tcon)
{
struct cvfs_private *private = tcon->ntvfs_private;
smb_tree_disconnect(private->tree);
smbcli_tree_close(private->tree);
return NT_STATUS_OK;
}
/*
a handler for simple async replies
this handler can only be used for functions that don't return any
parameters (those that just return a status code)
*/
static void async_simple(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smbcli_request_simple_recv(c_req);
req->async.send_fn(req);
}
/* save some typing for the simple functions */
#define ASYNC_RECV_TAIL(io, async_fn) do { \
if (!c_req) return NT_STATUS_UNSUCCESSFUL; \
{ \
struct async_info *async; \
async = talloc_p(req, struct async_info); \
if (!async) return NT_STATUS_NO_MEMORY; \
async->parms = io; \
async->req = req; \
c_req->async.private = async; \
} \
c_req->async.fn = async_fn; \
req->control_flags |= REQ_CONTROL_ASYNC; \
return NT_STATUS_OK; \
} while (0)
#define SIMPLE_ASYNC_TAIL ASYNC_RECV_TAIL(NULL, async_simple)
/*
delete a file - the dirtype specifies the file types to include in the search.
The name can contain CIFS wildcards, but rarely does (except with OS/2 clients)
*/
static NTSTATUS cvfs_unlink(struct smbsrv_request *req, struct smb_unlink *unl)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
/* see if the front end will allow us to perform this
function asynchronously. */
if (!req->async.send_fn) {
return smb_raw_unlink(private->tree, unl);
}
c_req = smb_raw_unlink_send(private->tree, unl);
SIMPLE_ASYNC_TAIL;
}
/*
a handler for async ioctl replies
*/
static void async_ioctl(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_ioctl_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/*
ioctl interface
*/
static NTSTATUS cvfs_ioctl(struct smbsrv_request *req, union smb_ioctl *io)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
/* see if the front end will allow us to perform this
function asynchronously. */
if (!req->async.send_fn) {
return smb_raw_ioctl(private->tree, req, io);
}
c_req = smb_raw_ioctl_send(private->tree, io);
ASYNC_RECV_TAIL(io, async_ioctl);
}
/*
check if a directory exists
*/
static NTSTATUS cvfs_chkpath(struct smbsrv_request *req, struct smb_chkpath *cp)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_chkpath(private->tree, cp);
}
c_req = smb_raw_chkpath_send(private->tree, cp);
SIMPLE_ASYNC_TAIL;
}
/*
a handler for async qpathinfo replies
*/
static void async_qpathinfo(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_pathinfo_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/*
return info on a pathname
*/
static NTSTATUS cvfs_qpathinfo(struct smbsrv_request *req, union smb_fileinfo *info)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_pathinfo(private->tree, req, info);
}
c_req = smb_raw_pathinfo_send(private->tree, info);
ASYNC_RECV_TAIL(info, async_qpathinfo);
}
/*
a handler for async qfileinfo replies
*/
static void async_qfileinfo(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_fileinfo_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/*
query info on a open file
*/
static NTSTATUS cvfs_qfileinfo(struct smbsrv_request *req, union smb_fileinfo *info)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_fileinfo(private->tree, req, info);
}
c_req = smb_raw_fileinfo_send(private->tree, info);
ASYNC_RECV_TAIL(info, async_qfileinfo);
}
/*
set info on a pathname
*/
static NTSTATUS cvfs_setpathinfo(struct smbsrv_request *req, union smb_setfileinfo *st)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_setpathinfo(private->tree, st);
}
c_req = smb_raw_setpathinfo_send(private->tree, st);
SIMPLE_ASYNC_TAIL;
}
/*
a handler for async open replies
*/
static void async_open(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_open_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/*
open a file
*/
static NTSTATUS cvfs_open(struct smbsrv_request *req, union smb_open *io)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (private->map_calls && in_list("open", private->map_calls, True) &&
io->generic.level != RAW_OPEN_GENERIC) {
return ntvfs_map_open(req, io);
}
if (!req->async.send_fn) {
return smb_raw_open(private->tree, req, io);
}
c_req = smb_raw_open_send(private->tree, io);
ASYNC_RECV_TAIL(io, async_open);
}
/*
create a directory
*/
static NTSTATUS cvfs_mkdir(struct smbsrv_request *req, union smb_mkdir *md)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_mkdir(private->tree, md);
}
c_req = smb_raw_mkdir_send(private->tree, md);
SIMPLE_ASYNC_TAIL;
}
/*
remove a directory
*/
static NTSTATUS cvfs_rmdir(struct smbsrv_request *req, struct smb_rmdir *rd)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_rmdir(private->tree, rd);
}
c_req = smb_raw_rmdir_send(private->tree, rd);
SIMPLE_ASYNC_TAIL;
}
/*
rename a set of files
*/
static NTSTATUS cvfs_rename(struct smbsrv_request *req, union smb_rename *ren)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_rename(private->tree, ren);
}
c_req = smb_raw_rename_send(private->tree, ren);
SIMPLE_ASYNC_TAIL;
}
/*
copy a set of files
*/
static NTSTATUS cvfs_copy(struct smbsrv_request *req, struct smb_copy *cp)
{
return NT_STATUS_NOT_SUPPORTED;
}
/*
a handler for async read replies
*/
static void async_read(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_read_recv(c_req, async->parms);
req->async.send_fn(req);
}
/*
read from a file
*/
static NTSTATUS cvfs_read(struct smbsrv_request *req, union smb_read *rd)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_read(private->tree, rd);
}
c_req = smb_raw_read_send(private->tree, rd);
ASYNC_RECV_TAIL(rd, async_read);
}
/*
a handler for async write replies
*/
static void async_write(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_write_recv(c_req, async->parms);
req->async.send_fn(req);
}
/*
write to a file
*/
static NTSTATUS cvfs_write(struct smbsrv_request *req, union smb_write *wr)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_write(private->tree, wr);
}
c_req = smb_raw_write_send(private->tree, wr);
ASYNC_RECV_TAIL(wr, async_write);
}
/*
seek in a file
*/
static NTSTATUS cvfs_seek(struct smbsrv_request *req, struct smb_seek *io)
{
return NT_STATUS_NOT_SUPPORTED;
}
/*
flush a file
*/
static NTSTATUS cvfs_flush(struct smbsrv_request *req, struct smb_flush *io)
{
return NT_STATUS_OK;
}
/*
close a file
*/
static NTSTATUS cvfs_close(struct smbsrv_request *req, union smb_close *io)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_close(private->tree, io);
}
c_req = smb_raw_close_send(private->tree, io);
SIMPLE_ASYNC_TAIL;
}
/*
exit - closing files?
*/
static NTSTATUS cvfs_exit(struct smbsrv_request *req)
{
return NT_STATUS_NOT_SUPPORTED;
}
/*
lock a byte range
*/
static NTSTATUS cvfs_lock(struct smbsrv_request *req, union smb_lock *lck)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_lock(private->tree, lck);
}
c_req = smb_raw_lock_send(private->tree, lck);
SIMPLE_ASYNC_TAIL;
}
/*
set info on a open file
*/
static NTSTATUS cvfs_setfileinfo(struct smbsrv_request *req,
union smb_setfileinfo *info)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_setfileinfo(private->tree, info);
}
c_req = smb_raw_setfileinfo_send(private->tree, info);
SIMPLE_ASYNC_TAIL;
}
/*
a handler for async fsinfo replies
*/
static void async_fsinfo(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_fsinfo_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/*
return filesystem space info
*/
static NTSTATUS cvfs_fsinfo(struct smbsrv_request *req, union smb_fsinfo *fs)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_fsinfo(private->tree, req, fs);
}
c_req = smb_raw_fsinfo_send(private->tree, req, fs);
ASYNC_RECV_TAIL(fs, async_fsinfo);
}
/*
return print queue info
*/
static NTSTATUS cvfs_lpq(struct smbsrv_request *req, union smb_lpq *lpq)
{
return NT_STATUS_NOT_SUPPORTED;
}
/*
list files in a directory matching a wildcard pattern
*/
static NTSTATUS cvfs_search_first(struct smbsrv_request *req, union smb_search_first *io,
void *search_private,
BOOL (*callback)(void *, union smb_search_data *))
{
struct cvfs_private *private = req->tcon->ntvfs_private;
return smb_raw_search_first(private->tree, req, io, search_private, callback);
}
/* continue a search */
static NTSTATUS cvfs_search_next(struct smbsrv_request *req, union smb_search_next *io,
void *search_private,
BOOL (*callback)(void *, union smb_search_data *))
{
struct cvfs_private *private = req->tcon->ntvfs_private;
return smb_raw_search_next(private->tree, req, io, search_private, callback);
}
/* close a search */
static NTSTATUS cvfs_search_close(struct smbsrv_request *req, union smb_search_close *io)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
return smb_raw_search_close(private->tree, io);
}
/*
a handler for async trans2 replies
*/
static void async_trans2(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private;
struct smbsrv_request *req = async->req;
req->async.status = smb_raw_trans2_recv(c_req, req, async->parms);
req->async.send_fn(req);
}
/* raw trans2 */
static NTSTATUS cvfs_trans2(struct smbsrv_request *req, struct smb_trans2 *trans2)
{
struct cvfs_private *private = req->tcon->ntvfs_private;
struct smbcli_request *c_req;
if (!req->async.send_fn) {
return smb_raw_trans2(private->tree, req, trans2);
}
c_req = smb_raw_trans2_send(private->tree, trans2);
ASYNC_RECV_TAIL(trans2, async_trans2);
}
/* SMBtrans - not used on file shares */
static NTSTATUS cvfs_trans(struct smbsrv_request *req, struct smb_trans2 *trans2)
{
return NT_STATUS_ACCESS_DENIED;
}
/*
initialise the CIFS->CIFS backend, registering ourselves with the ntvfs subsystem
*/
NTSTATUS ntvfs_cifs_init(void)
{
NTSTATUS ret;
struct ntvfs_ops ops;
ZERO_STRUCT(ops);
/* fill in the name and type */
ops.name = "cifs";
ops.type = NTVFS_DISK;
/* fill in all the operations */
ops.connect = cvfs_connect;
ops.disconnect = cvfs_disconnect;
ops.unlink = cvfs_unlink;
ops.chkpath = cvfs_chkpath;
ops.qpathinfo = cvfs_qpathinfo;
ops.setpathinfo = cvfs_setpathinfo;
ops.open = cvfs_open;
ops.mkdir = cvfs_mkdir;
ops.rmdir = cvfs_rmdir;
ops.rename = cvfs_rename;
ops.copy = cvfs_copy;
ops.ioctl = cvfs_ioctl;
ops.read = cvfs_read;
ops.write = cvfs_write;
ops.seek = cvfs_seek;
ops.flush = cvfs_flush;
ops.close = cvfs_close;
ops.exit = cvfs_exit;
ops.lock = cvfs_lock;
ops.setfileinfo = cvfs_setfileinfo;
ops.qfileinfo = cvfs_qfileinfo;
ops.fsinfo = cvfs_fsinfo;
ops.lpq = cvfs_lpq;
ops.search_first = cvfs_search_first;
ops.search_next = cvfs_search_next;
ops.search_close = cvfs_search_close;
ops.trans = cvfs_trans;
/* only define this one for trans2 testing */
ops.trans2 = NULL;
/* register ourselves with the NTVFS subsystem. We register
under the name 'cifs'. */
ret = register_backend("ntvfs", &ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register CIFS backend!\n"));
}
return ret;
}
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