1 files changed, 0 insertions, 449 deletions

diff --git a/fs/ksmbd/connection.c b/fs/ksmbd/connection.c
deleted file mode 100644
index 56be077e5d8a..000000000000
--- a/fs/ksmbd/connection.c
+++ /dev/null
@@ -1,449 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *   Copyright (C) 2016 Namjae Jeon <namjae.jeon@protocolfreedom.org>
- *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/mutex.h>
-#include <linux/freezer.h>
-#include <linux/module.h>
-
-#include "server.h"
-#include "smb_common.h"
-#include "mgmt/ksmbd_ida.h"
-#include "connection.h"
-#include "transport_tcp.h"
-#include "transport_rdma.h"
-
-static DEFINE_MUTEX(init_lock);
-
-static struct ksmbd_conn_ops default_conn_ops;
-
-LIST_HEAD(conn_list);
-DEFINE_RWLOCK(conn_list_lock);
-
-/**
- * ksmbd_conn_free() - free resources of the connection instance
- *
- * @conn:	connection instance to be cleand up
- *
- * During the thread termination, the corresponding conn instance
- * resources(sock/memory) are released and finally the conn object is freed.
- */
-void ksmbd_conn_free(struct ksmbd_conn *conn)
-{
-	write_lock(&conn_list_lock);
-	list_del(&conn->conns_list);
-	write_unlock(&conn_list_lock);
-
-	xa_destroy(&conn->sessions);
-	kvfree(conn->request_buf);
-	kfree(conn->preauth_info);
-	kfree(conn);
-}
-
-/**
- * ksmbd_conn_alloc() - initialize a new connection instance
- *
- * Return:	ksmbd_conn struct on success, otherwise NULL
- */
-struct ksmbd_conn *ksmbd_conn_alloc(void)
-{
-	struct ksmbd_conn *conn;
-
-	conn = kzalloc(sizeof(struct ksmbd_conn), GFP_KERNEL);
-	if (!conn)
-		return NULL;
-
-	conn->need_neg = true;
-	conn->status = KSMBD_SESS_NEW;
-	conn->local_nls = load_nls("utf8");
-	if (!conn->local_nls)
-		conn->local_nls = load_nls_default();
-	if (IS_ENABLED(CONFIG_UNICODE))
-		conn->um = utf8_load(UNICODE_AGE(12, 1, 0));
-	else
-		conn->um = ERR_PTR(-EOPNOTSUPP);
-	if (IS_ERR(conn->um))
-		conn->um = NULL;
-	atomic_set(&conn->req_running, 0);
-	atomic_set(&conn->r_count, 0);
-	conn->total_credits = 1;
-	conn->outstanding_credits = 0;
-
-	init_waitqueue_head(&conn->req_running_q);
-	init_waitqueue_head(&conn->r_count_q);
-	INIT_LIST_HEAD(&conn->conns_list);
-	INIT_LIST_HEAD(&conn->requests);
-	INIT_LIST_HEAD(&conn->async_requests);
-	spin_lock_init(&conn->request_lock);
-	spin_lock_init(&conn->credits_lock);
-	ida_init(&conn->async_ida);
-	xa_init(&conn->sessions);
-
-	spin_lock_init(&conn->llist_lock);
-	INIT_LIST_HEAD(&conn->lock_list);
-
-	write_lock(&conn_list_lock);
-	list_add(&conn->conns_list, &conn_list);
-	write_unlock(&conn_list_lock);
-	return conn;
-}
-
-bool ksmbd_conn_lookup_dialect(struct ksmbd_conn *c)
-{
-	struct ksmbd_conn *t;
-	bool ret = false;
-
-	read_lock(&conn_list_lock);
-	list_for_each_entry(t, &conn_list, conns_list) {
-		if (memcmp(t->ClientGUID, c->ClientGUID, SMB2_CLIENT_GUID_SIZE))
-			continue;
-
-		ret = true;
-		break;
-	}
-	read_unlock(&conn_list_lock);
-	return ret;
-}
-
-void ksmbd_conn_enqueue_request(struct ksmbd_work *work)
-{
-	struct ksmbd_conn *conn = work->conn;
-	struct list_head *requests_queue = NULL;
-
-	if (conn->ops->get_cmd_val(work) != SMB2_CANCEL_HE) {
-		requests_queue = &conn->requests;
-		work->syncronous = true;
-	}
-
-	if (requests_queue) {
-		atomic_inc(&conn->req_running);
-		spin_lock(&conn->request_lock);
-		list_add_tail(&work->request_entry, requests_queue);
-		spin_unlock(&conn->request_lock);
-	}
-}
-
-int ksmbd_conn_try_dequeue_request(struct ksmbd_work *work)
-{
-	struct ksmbd_conn *conn = work->conn;
-	int ret = 1;
-
-	if (list_empty(&work->request_entry) &&
-	    list_empty(&work->async_request_entry))
-		return 0;
-
-	if (!work->multiRsp)
-		atomic_dec(&conn->req_running);
-	spin_lock(&conn->request_lock);
-	if (!work->multiRsp) {
-		list_del_init(&work->request_entry);
-		if (work->syncronous == false)
-			list_del_init(&work->async_request_entry);
-		ret = 0;
-	}
-	spin_unlock(&conn->request_lock);
-
-	wake_up_all(&conn->req_running_q);
-	return ret;
-}
-
-static void ksmbd_conn_lock(struct ksmbd_conn *conn)
-{
-	mutex_lock(&conn->srv_mutex);
-}
-
-static void ksmbd_conn_unlock(struct ksmbd_conn *conn)
-{
-	mutex_unlock(&conn->srv_mutex);
-}
-
-void ksmbd_conn_wait_idle(struct ksmbd_conn *conn)
-{
-	wait_event(conn->req_running_q, atomic_read(&conn->req_running) < 2);
-}
-
-int ksmbd_conn_write(struct ksmbd_work *work)
-{
-	struct ksmbd_conn *conn = work->conn;
-	size_t len = 0;
-	int sent;
-	struct kvec iov[3];
-	int iov_idx = 0;
-
-	if (!work->response_buf) {
-		pr_err("NULL response header\n");
-		return -EINVAL;
-	}
-
-	if (work->tr_buf) {
-		iov[iov_idx] = (struct kvec) { work->tr_buf,
-				sizeof(struct smb2_transform_hdr) + 4 };
-		len += iov[iov_idx++].iov_len;
-	}
-
-	if (work->aux_payload_sz) {
-		iov[iov_idx] = (struct kvec) { work->response_buf, work->resp_hdr_sz };
-		len += iov[iov_idx++].iov_len;
-		iov[iov_idx] = (struct kvec) { work->aux_payload_buf, work->aux_payload_sz };
-		len += iov[iov_idx++].iov_len;
-	} else {
-		if (work->tr_buf)
-			iov[iov_idx].iov_len = work->resp_hdr_sz;
-		else
-			iov[iov_idx].iov_len = get_rfc1002_len(work->response_buf) + 4;
-		iov[iov_idx].iov_base = work->response_buf;
-		len += iov[iov_idx++].iov_len;
-	}
-
-	ksmbd_conn_lock(conn);
-	sent = conn->transport->ops->writev(conn->transport, &iov[0],
-					iov_idx, len,
-					work->need_invalidate_rkey,
-					work->remote_key);
-	ksmbd_conn_unlock(conn);
-
-	if (sent < 0) {
-		pr_err("Failed to send message: %d\n", sent);
-		return sent;
-	}
-
-	return 0;
-}
-
-int ksmbd_conn_rdma_read(struct ksmbd_conn *conn,
-			 void *buf, unsigned int buflen,
-			 struct smb2_buffer_desc_v1 *desc,
-			 unsigned int desc_len)
-{
-	int ret = -EINVAL;
-
-	if (conn->transport->ops->rdma_read)
-		ret = conn->transport->ops->rdma_read(conn->transport,
-						      buf, buflen,
-						      desc, desc_len);
-	return ret;
-}
-
-int ksmbd_conn_rdma_write(struct ksmbd_conn *conn,
-			  void *buf, unsigned int buflen,
-			  struct smb2_buffer_desc_v1 *desc,
-			  unsigned int desc_len)
-{
-	int ret = -EINVAL;
-
-	if (conn->transport->ops->rdma_write)
-		ret = conn->transport->ops->rdma_write(conn->transport,
-						       buf, buflen,
-						       desc, desc_len);
-	return ret;
-}
-
-bool ksmbd_conn_alive(struct ksmbd_conn *conn)
-{
-	if (!ksmbd_server_running())
-		return false;
-
-	if (conn->status == KSMBD_SESS_EXITING)
-		return false;
-
-	if (kthread_should_stop())
-		return false;
-
-	if (atomic_read(&conn->stats.open_files_count) > 0)
-		return true;
-
-	/*
-	 * Stop current session if the time that get last request from client
-	 * is bigger than deadtime user configured and opening file count is
-	 * zero.
-	 */
-	if (server_conf.deadtime > 0 &&
-	    time_after(jiffies, conn->last_active + server_conf.deadtime)) {
-		ksmbd_debug(CONN, "No response from client in %lu minutes\n",
-			    server_conf.deadtime / SMB_ECHO_INTERVAL);
-		return false;
-	}
-	return true;
-}
-
-/**
- * ksmbd_conn_handler_loop() - session thread to listen on new smb requests
- * @p:		connection instance
- *
- * One thread each per connection
- *
- * Return:	0 on success
- */
-int ksmbd_conn_handler_loop(void *p)
-{
-	struct ksmbd_conn *conn = (struct ksmbd_conn *)p;
-	struct ksmbd_transport *t = conn->transport;
-	unsigned int pdu_size, max_allowed_pdu_size;
-	char hdr_buf[4] = {0,};
-	int size;
-
-	mutex_init(&conn->srv_mutex);
-	__module_get(THIS_MODULE);
-
-	if (t->ops->prepare && t->ops->prepare(t))
-		goto out;
-
-	conn->last_active = jiffies;
-	while (ksmbd_conn_alive(conn)) {
-		if (try_to_freeze())
-			continue;
-
-		kvfree(conn->request_buf);
-		conn->request_buf = NULL;
-
-		size = t->ops->read(t, hdr_buf, sizeof(hdr_buf));
-		if (size != sizeof(hdr_buf))
-			break;
-
-		pdu_size = get_rfc1002_len(hdr_buf);
-		ksmbd_debug(CONN, "RFC1002 header %u bytes\n", pdu_size);
-
-		if (conn->status == KSMBD_SESS_GOOD)
-			max_allowed_pdu_size =
-				SMB3_MAX_MSGSIZE + conn->vals->max_write_size;
-		else
-			max_allowed_pdu_size = SMB3_MAX_MSGSIZE;
-
-		if (pdu_size > max_allowed_pdu_size) {
-			pr_err_ratelimited("PDU length(%u) excceed maximum allowed pdu size(%u) on connection(%d)\n",
-					pdu_size, max_allowed_pdu_size,
-					conn->status);
-			break;
-		}
-
-		/*
-		 * Check if pdu size is valid (min : smb header size,
-		 * max : 0x00FFFFFF).
-		 */
-		if (pdu_size < __SMB2_HEADER_STRUCTURE_SIZE ||
-		    pdu_size > MAX_STREAM_PROT_LEN) {
-			break;
-		}
-
-		/* 4 for rfc1002 length field */
-		size = pdu_size + 4;
-		conn->request_buf = kvmalloc(size,
-					     GFP_KERNEL |
-					     __GFP_NOWARN |
-					     __GFP_NORETRY);
-		if (!conn->request_buf)
-			break;
-
-		memcpy(conn->request_buf, hdr_buf, sizeof(hdr_buf));
-		if (!ksmbd_smb_request(conn))
-			break;
-
-		/*
-		 * We already read 4 bytes to find out PDU size, now
-		 * read in PDU
-		 */
-		size = t->ops->read(t, conn->request_buf + 4, pdu_size);
-		if (size < 0) {
-			pr_err("sock_read failed: %d\n", size);
-			break;
-		}
-
-		if (size != pdu_size) {
-			pr_err("PDU error. Read: %d, Expected: %d\n",
-			       size, pdu_size);
-			continue;
-		}
-
-		if (!default_conn_ops.process_fn) {
-			pr_err("No connection request callback\n");
-			break;
-		}
-
-		if (default_conn_ops.process_fn(conn)) {
-			pr_err("Cannot handle request\n");
-			break;
-		}
-	}
-
-out:
-	/* Wait till all reference dropped to the Server object*/
-	wait_event(conn->r_count_q, atomic_read(&conn->r_count) == 0);
-
-
-	if (IS_ENABLED(CONFIG_UNICODE))
-		utf8_unload(conn->um);
-	unload_nls(conn->local_nls);
-	if (default_conn_ops.terminate_fn)
-		default_conn_ops.terminate_fn(conn);
-	t->ops->disconnect(t);
-	module_put(THIS_MODULE);
-	return 0;
-}
-
-void ksmbd_conn_init_server_callbacks(struct ksmbd_conn_ops *ops)
-{
-	default_conn_ops.process_fn = ops->process_fn;
-	default_conn_ops.terminate_fn = ops->terminate_fn;
-}
-
-int ksmbd_conn_transport_init(void)
-{
-	int ret;
-
-	mutex_lock(&init_lock);
-	ret = ksmbd_tcp_init();
-	if (ret) {
-		pr_err("Failed to init TCP subsystem: %d\n", ret);
-		goto out;
-	}
-
-	ret = ksmbd_rdma_init();
-	if (ret) {
-		pr_err("Failed to init RDMA subsystem: %d\n", ret);
-		goto out;
-	}
-out:
-	mutex_unlock(&init_lock);
-	return ret;
-}
-
-static void stop_sessions(void)
-{
-	struct ksmbd_conn *conn;
-	struct ksmbd_transport *t;
-
-again:
-	read_lock(&conn_list_lock);
-	list_for_each_entry(conn, &conn_list, conns_list) {
-		struct task_struct *task;
-
-		t = conn->transport;
-		task = t->handler;
-		if (task)
-			ksmbd_debug(CONN, "Stop session handler %s/%d\n",
-				    task->comm, task_pid_nr(task));
-		conn->status = KSMBD_SESS_EXITING;
-		if (t->ops->shutdown) {
-			read_unlock(&conn_list_lock);
-			t->ops->shutdown(t);
-			read_lock(&conn_list_lock);
-		}
-	}
-	read_unlock(&conn_list_lock);
-
-	if (!list_empty(&conn_list)) {
-		schedule_timeout_interruptible(HZ / 10); /* 100ms */
-		goto again;
-	}
-}
-
-void ksmbd_conn_transport_destroy(void)
-{
-	mutex_lock(&init_lock);
-	ksmbd_tcp_destroy();
-	ksmbd_rdma_destroy();
-	stop_sessions();
-	mutex_unlock(&init_lock);
-}