1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2018 Samsung Electronics Co., Ltd.
4 */
5
6 #include <linux/list.h>
7 #include <linux/slab.h>
8 #include <linux/xarray.h>
9
10 #include "../transport_ipc.h"
11 #include "../connection.h"
12
13 #include "tree_connect.h"
14 #include "user_config.h"
15 #include "share_config.h"
16 #include "user_session.h"
17
18 struct ksmbd_tree_conn_status
ksmbd_tree_conn_connect(struct ksmbd_session * sess,char * share_name)19 ksmbd_tree_conn_connect(struct ksmbd_session *sess, char *share_name)
20 {
21 struct ksmbd_tree_conn_status status = {-ENOENT, NULL};
22 struct ksmbd_tree_connect_response *resp = NULL;
23 struct ksmbd_share_config *sc;
24 struct ksmbd_tree_connect *tree_conn = NULL;
25 struct sockaddr *peer_addr;
26 int ret;
27
28 sc = ksmbd_share_config_get(share_name);
29 if (!sc)
30 return status;
31
32 tree_conn = kzalloc(sizeof(struct ksmbd_tree_connect), GFP_KERNEL);
33 if (!tree_conn) {
34 status.ret = -ENOMEM;
35 goto out_error;
36 }
37
38 tree_conn->id = ksmbd_acquire_tree_conn_id(sess);
39 if (tree_conn->id < 0) {
40 status.ret = -EINVAL;
41 goto out_error;
42 }
43
44 peer_addr = KSMBD_TCP_PEER_SOCKADDR(sess->conn);
45 resp = ksmbd_ipc_tree_connect_request(sess,
46 sc,
47 tree_conn,
48 peer_addr);
49 if (!resp) {
50 status.ret = -EINVAL;
51 goto out_error;
52 }
53
54 status.ret = resp->status;
55 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
56 goto out_error;
57
58 tree_conn->flags = resp->connection_flags;
59 tree_conn->user = sess->user;
60 tree_conn->share_conf = sc;
61 status.tree_conn = tree_conn;
62
63 ret = xa_err(xa_store(&sess->tree_conns, tree_conn->id, tree_conn,
64 GFP_KERNEL));
65 if (ret) {
66 status.ret = -ENOMEM;
67 goto out_error;
68 }
69 kvfree(resp);
70 return status;
71
72 out_error:
73 if (tree_conn)
74 ksmbd_release_tree_conn_id(sess, tree_conn->id);
75 ksmbd_share_config_put(sc);
76 kfree(tree_conn);
77 kvfree(resp);
78 return status;
79 }
80
ksmbd_tree_conn_disconnect(struct ksmbd_session * sess,struct ksmbd_tree_connect * tree_conn)81 int ksmbd_tree_conn_disconnect(struct ksmbd_session *sess,
82 struct ksmbd_tree_connect *tree_conn)
83 {
84 int ret;
85
86 ret = ksmbd_ipc_tree_disconnect_request(sess->id, tree_conn->id);
87 ksmbd_release_tree_conn_id(sess, tree_conn->id);
88 xa_erase(&sess->tree_conns, tree_conn->id);
89 ksmbd_share_config_put(tree_conn->share_conf);
90 kfree(tree_conn);
91 return ret;
92 }
93
ksmbd_tree_conn_lookup(struct ksmbd_session * sess,unsigned int id)94 struct ksmbd_tree_connect *ksmbd_tree_conn_lookup(struct ksmbd_session *sess,
95 unsigned int id)
96 {
97 return xa_load(&sess->tree_conns, id);
98 }
99
ksmbd_tree_conn_share(struct ksmbd_session * sess,unsigned int id)100 struct ksmbd_share_config *ksmbd_tree_conn_share(struct ksmbd_session *sess,
101 unsigned int id)
102 {
103 struct ksmbd_tree_connect *tc;
104
105 tc = ksmbd_tree_conn_lookup(sess, id);
106 if (tc)
107 return tc->share_conf;
108 return NULL;
109 }
110
ksmbd_tree_conn_session_logoff(struct ksmbd_session * sess)111 int ksmbd_tree_conn_session_logoff(struct ksmbd_session *sess)
112 {
113 int ret = 0;
114 struct ksmbd_tree_connect *tc;
115 unsigned long id;
116
117 xa_for_each(&sess->tree_conns, id, tc)
118 ret |= ksmbd_tree_conn_disconnect(sess, tc);
119 xa_destroy(&sess->tree_conns);
120 return ret;
121 }
122