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 19 ksmbd_tree_conn_connect(struct ksmbd_conn *conn, struct ksmbd_session *sess, 20 const char *share_name) 21 { 22 struct ksmbd_tree_conn_status status = {-ENOENT, NULL}; 23 struct ksmbd_tree_connect_response *resp = NULL; 24 struct ksmbd_share_config *sc; 25 struct ksmbd_tree_connect *tree_conn = NULL; 26 struct sockaddr *peer_addr; 27 int ret; 28 29 sc = ksmbd_share_config_get(conn->um, share_name); 30 if (!sc) 31 return status; 32 33 tree_conn = kzalloc(sizeof(struct ksmbd_tree_connect), GFP_KERNEL); 34 if (!tree_conn) { 35 status.ret = -ENOMEM; 36 goto out_error; 37 } 38 39 tree_conn->id = ksmbd_acquire_tree_conn_id(sess); 40 if (tree_conn->id < 0) { 41 status.ret = -EINVAL; 42 goto out_error; 43 } 44 45 peer_addr = KSMBD_TCP_PEER_SOCKADDR(conn); 46 resp = ksmbd_ipc_tree_connect_request(sess, 47 sc, 48 tree_conn, 49 peer_addr); 50 if (!resp) { 51 status.ret = -EINVAL; 52 goto out_error; 53 } 54 55 status.ret = resp->status; 56 if (status.ret != KSMBD_TREE_CONN_STATUS_OK) 57 goto out_error; 58 59 tree_conn->flags = resp->connection_flags; 60 if (test_tree_conn_flag(tree_conn, KSMBD_TREE_CONN_FLAG_UPDATE)) { 61 struct ksmbd_share_config *new_sc; 62 63 ksmbd_share_config_del(sc); 64 new_sc = ksmbd_share_config_get(conn->um, share_name); 65 if (!new_sc) { 66 pr_err("Failed to update stale share config\n"); 67 status.ret = -ESTALE; 68 goto out_error; 69 } 70 ksmbd_share_config_put(sc); 71 sc = new_sc; 72 } 73 74 tree_conn->user = sess->user; 75 tree_conn->share_conf = sc; 76 status.tree_conn = tree_conn; 77 78 ret = xa_err(xa_store(&sess->tree_conns, tree_conn->id, tree_conn, 79 GFP_KERNEL)); 80 if (ret) { 81 status.ret = -ENOMEM; 82 goto out_error; 83 } 84 kvfree(resp); 85 return status; 86 87 out_error: 88 if (tree_conn) 89 ksmbd_release_tree_conn_id(sess, tree_conn->id); 90 ksmbd_share_config_put(sc); 91 kfree(tree_conn); 92 kvfree(resp); 93 return status; 94 } 95 96 int ksmbd_tree_conn_disconnect(struct ksmbd_session *sess, 97 struct ksmbd_tree_connect *tree_conn) 98 { 99 int ret; 100 101 ret = ksmbd_ipc_tree_disconnect_request(sess->id, tree_conn->id); 102 ksmbd_release_tree_conn_id(sess, tree_conn->id); 103 xa_erase(&sess->tree_conns, tree_conn->id); 104 ksmbd_share_config_put(tree_conn->share_conf); 105 kfree(tree_conn); 106 return ret; 107 } 108 109 struct ksmbd_tree_connect *ksmbd_tree_conn_lookup(struct ksmbd_session *sess, 110 unsigned int id) 111 { 112 struct ksmbd_tree_connect *tcon; 113 114 tcon = xa_load(&sess->tree_conns, id); 115 if (tcon) { 116 if (test_bit(TREE_CONN_EXPIRE, &tcon->status)) 117 tcon = NULL; 118 } 119 120 return tcon; 121 } 122 123 struct ksmbd_share_config *ksmbd_tree_conn_share(struct ksmbd_session *sess, 124 unsigned int id) 125 { 126 struct ksmbd_tree_connect *tc; 127 128 tc = ksmbd_tree_conn_lookup(sess, id); 129 if (tc) 130 return tc->share_conf; 131 return NULL; 132 } 133 134 int ksmbd_tree_conn_session_logoff(struct ksmbd_session *sess) 135 { 136 int ret = 0; 137 struct ksmbd_tree_connect *tc; 138 unsigned long id; 139 140 if (!sess) 141 return -EINVAL; 142 143 xa_for_each(&sess->tree_conns, id, tc) 144 ret |= ksmbd_tree_conn_disconnect(sess, tc); 145 xa_destroy(&sess->tree_conns); 146 return ret; 147 } 148