diff options
Diffstat (limited to 'fs/smb/server')
| -rw-r--r-- | fs/smb/server/ksmbd_netlink.h | 5 | ||||
| -rw-r--r-- | fs/smb/server/mgmt/user_session.c | 26 | ||||
| -rw-r--r-- | fs/smb/server/server.h | 1 | ||||
| -rw-r--r-- | fs/smb/server/smb2pdu.c | 3 | ||||
| -rw-r--r-- | fs/smb/server/transport_ipc.c | 3 | ||||
| -rw-r--r-- | fs/smb/server/transport_rdma.c | 99 | ||||
| -rw-r--r-- | fs/smb/server/transport_tcp.c | 27 |
7 files changed, 127 insertions, 37 deletions
diff --git a/fs/smb/server/ksmbd_netlink.h b/fs/smb/server/ksmbd_netlink.h index 3f07a612c05b..8ccd57fd904b 100644 --- a/fs/smb/server/ksmbd_netlink.h +++ b/fs/smb/server/ksmbd_netlink.h @@ -112,10 +112,11 @@ struct ksmbd_startup_request { __u32 smbd_max_io_size; /* smbd read write size */ __u32 max_connections; /* Number of maximum simultaneous connections */ __s8 bind_interfaces_only; - __s8 reserved[503]; /* Reserved room */ + __u32 max_ip_connections; /* Number of maximum connection per ip address */ + __s8 reserved[499]; /* Reserved room */ __u32 ifc_list_sz; /* interfaces list size */ __s8 ____payload[]; -}; +} __packed; #define KSMBD_STARTUP_CONFIG_INTERFACES(s) ((s)->____payload) diff --git a/fs/smb/server/mgmt/user_session.c b/fs/smb/server/mgmt/user_session.c index 9dec4c2940bc..b36d0676dbe5 100644 --- a/fs/smb/server/mgmt/user_session.c +++ b/fs/smb/server/mgmt/user_session.c @@ -104,29 +104,32 @@ int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name) if (!entry) return -ENOMEM; - down_read(&sess->rpc_lock); entry->method = method; entry->id = id = ksmbd_ipc_id_alloc(); if (id < 0) goto free_entry; + + down_write(&sess->rpc_lock); old = xa_store(&sess->rpc_handle_list, id, entry, KSMBD_DEFAULT_GFP); - if (xa_is_err(old)) + if (xa_is_err(old)) { + up_write(&sess->rpc_lock); goto free_id; + } resp = ksmbd_rpc_open(sess, id); - if (!resp) - goto erase_xa; + if (!resp) { + xa_erase(&sess->rpc_handle_list, entry->id); + up_write(&sess->rpc_lock); + goto free_id; + } - up_read(&sess->rpc_lock); + up_write(&sess->rpc_lock); kvfree(resp); return id; -erase_xa: - xa_erase(&sess->rpc_handle_list, entry->id); free_id: ksmbd_rpc_id_free(entry->id); free_entry: kfree(entry); - up_read(&sess->rpc_lock); return -EINVAL; } @@ -144,9 +147,14 @@ void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id) int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id) { struct ksmbd_session_rpc *entry; + int method; + down_read(&sess->rpc_lock); entry = xa_load(&sess->rpc_handle_list, id); - return entry ? entry->method : 0; + method = entry ? entry->method : 0; + up_read(&sess->rpc_lock); + + return method; } void ksmbd_session_destroy(struct ksmbd_session *sess) diff --git a/fs/smb/server/server.h b/fs/smb/server/server.h index 995555febe7d..b8a7317be86b 100644 --- a/fs/smb/server/server.h +++ b/fs/smb/server/server.h @@ -43,6 +43,7 @@ struct ksmbd_server_config { unsigned int auth_mechs; unsigned int max_connections; unsigned int max_inflight_req; + unsigned int max_ip_connections; char *conf[SERVER_CONF_WORK_GROUP + 1]; struct task_struct *dh_task; diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index a565fc36cee6..a1db006ab6e9 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -5628,7 +5628,8 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work, if (!work->tcon->posix_extensions) { pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); - rc = -EOPNOTSUPP; + path_put(&path); + return -EOPNOTSUPP; } else { info = (struct filesystem_posix_info *)(rsp->Buffer); info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); diff --git a/fs/smb/server/transport_ipc.c b/fs/smb/server/transport_ipc.c index 2a3e2b0ce557..2aa1b29bea08 100644 --- a/fs/smb/server/transport_ipc.c +++ b/fs/smb/server/transport_ipc.c @@ -335,6 +335,9 @@ static int ipc_server_config_on_startup(struct ksmbd_startup_request *req) if (req->max_connections) server_conf.max_connections = req->max_connections; + if (req->max_ip_connections) + server_conf.max_ip_connections = req->max_ip_connections; + ret = ksmbd_set_netbios_name(req->netbios_name); ret |= ksmbd_set_server_string(req->server_string); ret |= ksmbd_set_work_group(req->work_group); diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c index 74dfb6496095..e1f659d3b4cf 100644 --- a/fs/smb/server/transport_rdma.c +++ b/fs/smb/server/transport_rdma.c @@ -153,6 +153,10 @@ struct smb_direct_transport { struct work_struct disconnect_work; bool negotiation_requested; + + bool legacy_iwarp; + u8 initiator_depth; + u8 responder_resources; }; #define KSMBD_TRANS(t) ((struct ksmbd_transport *)&((t)->transport)) @@ -347,6 +351,9 @@ static struct smb_direct_transport *alloc_transport(struct rdma_cm_id *cm_id) t->cm_id = cm_id; cm_id->context = t; + t->initiator_depth = SMB_DIRECT_CM_INITIATOR_DEPTH; + t->responder_resources = 1; + t->status = SMB_DIRECT_CS_NEW; init_waitqueue_head(&t->wait_status); @@ -1676,21 +1683,21 @@ static int smb_direct_send_negotiate_response(struct smb_direct_transport *t, static int smb_direct_accept_client(struct smb_direct_transport *t) { struct rdma_conn_param conn_param; - struct ib_port_immutable port_immutable; - u32 ird_ord_hdr[2]; + __be32 ird_ord_hdr[2]; int ret; + /* + * smb_direct_handle_connect_request() + * already negotiated t->initiator_depth + * and t->responder_resources + */ memset(&conn_param, 0, sizeof(conn_param)); - conn_param.initiator_depth = min_t(u8, t->cm_id->device->attrs.max_qp_rd_atom, - SMB_DIRECT_CM_INITIATOR_DEPTH); - conn_param.responder_resources = 0; - - t->cm_id->device->ops.get_port_immutable(t->cm_id->device, - t->cm_id->port_num, - &port_immutable); - if (port_immutable.core_cap_flags & RDMA_CORE_PORT_IWARP) { - ird_ord_hdr[0] = conn_param.responder_resources; - ird_ord_hdr[1] = 1; + conn_param.initiator_depth = t->initiator_depth; + conn_param.responder_resources = t->responder_resources; + + if (t->legacy_iwarp) { + ird_ord_hdr[0] = cpu_to_be32(conn_param.responder_resources); + ird_ord_hdr[1] = cpu_to_be32(conn_param.initiator_depth); conn_param.private_data = ird_ord_hdr; conn_param.private_data_len = sizeof(ird_ord_hdr); } else { @@ -2081,10 +2088,13 @@ static bool rdma_frwr_is_supported(struct ib_device_attr *attrs) return true; } -static int smb_direct_handle_connect_request(struct rdma_cm_id *new_cm_id) +static int smb_direct_handle_connect_request(struct rdma_cm_id *new_cm_id, + struct rdma_cm_event *event) { struct smb_direct_transport *t; struct task_struct *handler; + u8 peer_initiator_depth; + u8 peer_responder_resources; int ret; if (!rdma_frwr_is_supported(&new_cm_id->device->attrs)) { @@ -2098,6 +2108,67 @@ static int smb_direct_handle_connect_request(struct rdma_cm_id *new_cm_id) if (!t) return -ENOMEM; + peer_initiator_depth = event->param.conn.initiator_depth; + peer_responder_resources = event->param.conn.responder_resources; + if (rdma_protocol_iwarp(new_cm_id->device, new_cm_id->port_num) && + event->param.conn.private_data_len == 8) { + /* + * Legacy clients with only iWarp MPA v1 support + * need a private blob in order to negotiate + * the IRD/ORD values. + */ + const __be32 *ird_ord_hdr = event->param.conn.private_data; + u32 ird32 = be32_to_cpu(ird_ord_hdr[0]); + u32 ord32 = be32_to_cpu(ird_ord_hdr[1]); + + /* + * cifs.ko sends the legacy IRD/ORD negotiation + * event if iWarp MPA v2 was used. + * + * Here we check that the values match and only + * mark the client as legacy if they don't match. + */ + if ((u32)event->param.conn.initiator_depth != ird32 || + (u32)event->param.conn.responder_resources != ord32) { + /* + * There are broken clients (old cifs.ko) + * using little endian and also + * struct rdma_conn_param only uses u8 + * for initiator_depth and responder_resources, + * so we truncate the value to U8_MAX. + * + * smb_direct_accept_client() will then + * do the real negotiation in order to + * select the minimum between client and + * server. + */ + ird32 = min_t(u32, ird32, U8_MAX); + ord32 = min_t(u32, ord32, U8_MAX); + + t->legacy_iwarp = true; + peer_initiator_depth = (u8)ird32; + peer_responder_resources = (u8)ord32; + } + } + + /* + * First set what the we as server are able to support + */ + t->initiator_depth = min_t(u8, t->initiator_depth, + new_cm_id->device->attrs.max_qp_rd_atom); + + /* + * negotiate the value by using the minimum + * between client and server if the client provided + * non 0 values. + */ + if (peer_initiator_depth != 0) + t->initiator_depth = min_t(u8, t->initiator_depth, + peer_initiator_depth); + if (peer_responder_resources != 0) + t->responder_resources = min_t(u8, t->responder_resources, + peer_responder_resources); + ret = smb_direct_connect(t); if (ret) goto out_err; @@ -2122,7 +2193,7 @@ static int smb_direct_listen_handler(struct rdma_cm_id *cm_id, { switch (event->event) { case RDMA_CM_EVENT_CONNECT_REQUEST: { - int ret = smb_direct_handle_connect_request(cm_id); + int ret = smb_direct_handle_connect_request(cm_id, event); if (ret) { pr_err("Can't create transport: %d\n", ret); diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c index 4337df97987d..1009cb324fd5 100644 --- a/fs/smb/server/transport_tcp.c +++ b/fs/smb/server/transport_tcp.c @@ -238,6 +238,7 @@ static int ksmbd_kthread_fn(void *p) struct interface *iface = (struct interface *)p; struct ksmbd_conn *conn; int ret; + unsigned int max_ip_conns; while (!kthread_should_stop()) { mutex_lock(&iface->sock_release_lock); @@ -255,34 +256,38 @@ static int ksmbd_kthread_fn(void *p) continue; } + if (!server_conf.max_ip_connections) + goto skip_max_ip_conns_limit; + /* * Limits repeated connections from clients with the same IP. */ + max_ip_conns = 0; down_read(&conn_list_lock); - list_for_each_entry(conn, &conn_list, conns_list) + list_for_each_entry(conn, &conn_list, conns_list) { #if IS_ENABLED(CONFIG_IPV6) if (client_sk->sk->sk_family == AF_INET6) { if (memcmp(&client_sk->sk->sk_v6_daddr, - &conn->inet6_addr, 16) == 0) { - ret = -EAGAIN; - break; - } + &conn->inet6_addr, 16) == 0) + max_ip_conns++; } else if (inet_sk(client_sk->sk)->inet_daddr == - conn->inet_addr) { - ret = -EAGAIN; - break; - } + conn->inet_addr) + max_ip_conns++; #else if (inet_sk(client_sk->sk)->inet_daddr == - conn->inet_addr) { + conn->inet_addr) + max_ip_conns++; +#endif + if (server_conf.max_ip_connections <= max_ip_conns) { ret = -EAGAIN; break; } -#endif + } up_read(&conn_list_lock); if (ret == -EAGAIN) continue; +skip_max_ip_conns_limit: if (server_conf.max_connections && atomic_inc_return(&active_num_conn) >= server_conf.max_connections) { pr_info_ratelimited("Limit the maximum number of connections(%u)\n", |