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/*
Unix SMB/CIFS implementation.
NTVFS utility code
Copyright (C) Stefan Metzmacher 2004
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/*
this implements common utility functions that many NTVFS backends may wish to use
*/
#include "includes.h"
#include "lib/util/dlinklist.h"
#include "ntvfs/ntvfs.h"
_PUBLIC_ struct ntvfs_request *ntvfs_request_create(struct ntvfs_context *ctx, TALLOC_CTX *mem_ctx,
struct auth_session_info *session_info,
uint16_t smbpid,
struct timeval request_time,
void *private_data,
void (*send_fn)(struct ntvfs_request *),
uint32_t state)
{
struct ntvfs_request *req;
struct ntvfs_async_state *async;
req = talloc(mem_ctx, struct ntvfs_request);
if (!req) return NULL;
req->ctx = ctx;
req->async_states = NULL;
req->session_info = session_info;
req->smbpid = smbpid;
req->statistics.request_time = request_time;
async = talloc(req, struct ntvfs_async_state);
if (!async) goto failed;
async->state = state;
async->private_data = private_data;
async->send_fn = send_fn;
async->status = NT_STATUS_INTERNAL_ERROR;
async->ntvfs = NULL;
DLIST_ADD(req->async_states, async);
return req;
failed:
talloc_free(req);
return NULL;
}
_PUBLIC_ NTSTATUS ntvfs_async_state_push(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
void *private_data,
void (*send_fn)(struct ntvfs_request *))
{
struct ntvfs_async_state *async;
async = talloc(req, struct ntvfs_async_state);
NT_STATUS_HAVE_NO_MEMORY(async);
async->state = req->async_states->state;
async->private_data = private_data;
async->send_fn = send_fn;
async->status = NT_STATUS_INTERNAL_ERROR;
async->ntvfs = ntvfs;
DLIST_ADD(req->async_states, async);
return NT_STATUS_OK;
}
_PUBLIC_ void ntvfs_async_state_pop(struct ntvfs_request *req)
{
struct ntvfs_async_state *async;
async = req->async_states;
DLIST_REMOVE(req->async_states, async);
req->async_states->state = async->state;
req->async_states->status = async->status;
talloc_free(async);
}
_PUBLIC_ NTSTATUS ntvfs_handle_new(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
struct ntvfs_handle **h)
{
if (!ntvfs->ctx->handles.create_new) {
return NT_STATUS_NOT_IMPLEMENTED;
}
return ntvfs->ctx->handles.create_new(ntvfs->ctx->handles.private_data, req, h);
}
_PUBLIC_ NTSTATUS ntvfs_handle_set_backend_data(struct ntvfs_handle *h,
struct ntvfs_module_context *ntvfs,
TALLOC_CTX *private_data)
{
struct ntvfs_handle_data *d;
bool first_time = h->backend_data?false:true;
for (d=h->backend_data; d; d = d->next) {
if (d->owner != ntvfs) continue;
d->private_data = talloc_steal(d, private_data);
return NT_STATUS_OK;
}
d = talloc(h, struct ntvfs_handle_data);
NT_STATUS_HAVE_NO_MEMORY(d);
d->owner = ntvfs;
d->private_data = talloc_steal(d, private_data);
DLIST_ADD(h->backend_data, d);
if (first_time) {
NTSTATUS status;
status = h->ctx->handles.make_valid(h->ctx->handles.private_data, h);
NT_STATUS_NOT_OK_RETURN(status);
}
return NT_STATUS_OK;
}
_PUBLIC_ void *ntvfs_handle_get_backend_data(struct ntvfs_handle *h,
struct ntvfs_module_context *ntvfs)
{
struct ntvfs_handle_data *d;
for (d=h->backend_data; d; d = d->next) {
if (d->owner != ntvfs) continue;
return d->private_data;
}
return NULL;
}
_PUBLIC_ void ntvfs_handle_remove_backend_data(struct ntvfs_handle *h,
struct ntvfs_module_context *ntvfs)
{
struct ntvfs_handle_data *d,*n;
for (d=h->backend_data; d; d = n) {
n = d->next;
if (d->owner != ntvfs) continue;
DLIST_REMOVE(h->backend_data, d);
talloc_free(d);
d = NULL;
}
if (h->backend_data) return;
/* if there's no backend_data anymore, destroy the handle */
h->ctx->handles.destroy(h->ctx->handles.private_data, h);
}
_PUBLIC_ struct ntvfs_handle *ntvfs_handle_search_by_wire_key(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
const DATA_BLOB *key)
{
if (!ntvfs->ctx->handles.search_by_wire_key) {
return NULL;
}
return ntvfs->ctx->handles.search_by_wire_key(ntvfs->ctx->handles.private_data, req, key);
}
_PUBLIC_ DATA_BLOB ntvfs_handle_get_wire_key(struct ntvfs_handle *h, TALLOC_CTX *mem_ctx)
{
return h->ctx->handles.get_wire_key(h->ctx->handles.private_data, h, mem_ctx);
}
_PUBLIC_ NTSTATUS ntvfs_set_handle_callbacks(struct ntvfs_context *ntvfs,
NTSTATUS (*create_new)(void *private_data, struct ntvfs_request *req, struct ntvfs_handle **h),
NTSTATUS (*make_valid)(void *private_data, struct ntvfs_handle *h),
void (*destroy)(void *private_data, struct ntvfs_handle *h),
struct ntvfs_handle *(*search_by_wire_key)(void *private_data, struct ntvfs_request *req, const DATA_BLOB *key),
DATA_BLOB (*get_wire_key)(void *private_data, struct ntvfs_handle *handle, TALLOC_CTX *mem_ctx),
void *private_data)
{
ntvfs->handles.create_new = create_new;
ntvfs->handles.make_valid = make_valid;
ntvfs->handles.destroy = destroy;
ntvfs->handles.search_by_wire_key = search_by_wire_key;
ntvfs->handles.get_wire_key = get_wire_key;
ntvfs->handles.private_data = private_data;
return NT_STATUS_OK;
}
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