diff options
Diffstat (limited to '')
| -rw-r--r-- | fs/smb/server/transport_ipc.c | 884 |
1 files changed, 884 insertions, 0 deletions
diff --git a/fs/smb/server/transport_ipc.c b/fs/smb/server/transport_ipc.c new file mode 100644 index 000000000..f29bb03f0 --- /dev/null +++ b/fs/smb/server/transport_ipc.c @@ -0,0 +1,884 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2018 Samsung Electronics Co., Ltd. + */ + +#include <linux/jhash.h> +#include <linux/slab.h> +#include <linux/rwsem.h> +#include <linux/mutex.h> +#include <linux/wait.h> +#include <linux/hashtable.h> +#include <net/net_namespace.h> +#include <net/genetlink.h> +#include <linux/socket.h> +#include <linux/workqueue.h> + +#include "vfs_cache.h" +#include "transport_ipc.h" +#include "server.h" +#include "smb_common.h" + +#include "mgmt/user_config.h" +#include "mgmt/share_config.h" +#include "mgmt/user_session.h" +#include "mgmt/tree_connect.h" +#include "mgmt/ksmbd_ida.h" +#include "connection.h" +#include "transport_tcp.h" +#include "transport_rdma.h" + +#define IPC_WAIT_TIMEOUT (2 * HZ) + +#define IPC_MSG_HASH_BITS 3 +static DEFINE_HASHTABLE(ipc_msg_table, IPC_MSG_HASH_BITS); +static DECLARE_RWSEM(ipc_msg_table_lock); +static DEFINE_MUTEX(startup_lock); + +static DEFINE_IDA(ipc_ida); + +static unsigned int ksmbd_tools_pid; + +static bool ksmbd_ipc_validate_version(struct genl_info *m) +{ + if (m->genlhdr->version != KSMBD_GENL_VERSION) { + pr_err("%s. ksmbd: %d, kernel module: %d. %s.\n", + "Daemon and kernel module version mismatch", + m->genlhdr->version, + KSMBD_GENL_VERSION, + "User-space ksmbd should terminate"); + return false; + } + return true; +} + +struct ksmbd_ipc_msg { + unsigned int type; + unsigned int sz; + unsigned char payload[]; +}; + +struct ipc_msg_table_entry { + unsigned int handle; + unsigned int type; + wait_queue_head_t wait; + struct hlist_node ipc_table_hlist; + + void *response; +}; + +static struct delayed_work ipc_timer_work; + +static int handle_startup_event(struct sk_buff *skb, struct genl_info *info); +static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info); +static int handle_generic_event(struct sk_buff *skb, struct genl_info *info); +static int ksmbd_ipc_heartbeat_request(void); + +static const struct nla_policy ksmbd_nl_policy[KSMBD_EVENT_MAX + 1] = { + [KSMBD_EVENT_UNSPEC] = { + .len = 0, + }, + [KSMBD_EVENT_HEARTBEAT_REQUEST] = { + .len = sizeof(struct ksmbd_heartbeat), + }, + [KSMBD_EVENT_STARTING_UP] = { + .len = sizeof(struct ksmbd_startup_request), + }, + [KSMBD_EVENT_SHUTTING_DOWN] = { + .len = sizeof(struct ksmbd_shutdown_request), + }, + [KSMBD_EVENT_LOGIN_REQUEST] = { + .len = sizeof(struct ksmbd_login_request), + }, + [KSMBD_EVENT_LOGIN_RESPONSE] = { + .len = sizeof(struct ksmbd_login_response), + }, + [KSMBD_EVENT_SHARE_CONFIG_REQUEST] = { + .len = sizeof(struct ksmbd_share_config_request), + }, + [KSMBD_EVENT_SHARE_CONFIG_RESPONSE] = { + .len = sizeof(struct ksmbd_share_config_response), + }, + [KSMBD_EVENT_TREE_CONNECT_REQUEST] = { + .len = sizeof(struct ksmbd_tree_connect_request), + }, + [KSMBD_EVENT_TREE_CONNECT_RESPONSE] = { + .len = sizeof(struct ksmbd_tree_connect_response), + }, + [KSMBD_EVENT_TREE_DISCONNECT_REQUEST] = { + .len = sizeof(struct ksmbd_tree_disconnect_request), + }, + [KSMBD_EVENT_LOGOUT_REQUEST] = { + .len = sizeof(struct ksmbd_logout_request), + }, + [KSMBD_EVENT_RPC_REQUEST] = { + }, + [KSMBD_EVENT_RPC_RESPONSE] = { + }, + [KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST] = { + }, + [KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE] = { + }, +}; + +static struct genl_ops ksmbd_genl_ops[] = { + { + .cmd = KSMBD_EVENT_UNSPEC, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_HEARTBEAT_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_STARTING_UP, + .doit = handle_startup_event, + }, + { + .cmd = KSMBD_EVENT_SHUTTING_DOWN, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_LOGIN_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_LOGIN_RESPONSE, + .doit = handle_generic_event, + }, + { + .cmd = KSMBD_EVENT_SHARE_CONFIG_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_SHARE_CONFIG_RESPONSE, + .doit = handle_generic_event, + }, + { + .cmd = KSMBD_EVENT_TREE_CONNECT_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_TREE_CONNECT_RESPONSE, + .doit = handle_generic_event, + }, + { + .cmd = KSMBD_EVENT_TREE_DISCONNECT_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_LOGOUT_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_RPC_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_RPC_RESPONSE, + .doit = handle_generic_event, + }, + { + .cmd = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST, + .doit = handle_unsupported_event, + }, + { + .cmd = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE, + .doit = handle_generic_event, + }, +}; + +static struct genl_family ksmbd_genl_family = { + .name = KSMBD_GENL_NAME, + .version = KSMBD_GENL_VERSION, + .hdrsize = 0, + .maxattr = KSMBD_EVENT_MAX, + .netnsok = true, + .module = THIS_MODULE, + .ops = ksmbd_genl_ops, + .n_ops = ARRAY_SIZE(ksmbd_genl_ops), + .resv_start_op = KSMBD_EVENT_SPNEGO_AUTHEN_RESPONSE + 1, +}; + +static void ksmbd_nl_init_fixup(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ksmbd_genl_ops); i++) + ksmbd_genl_ops[i].validate = GENL_DONT_VALIDATE_STRICT | + GENL_DONT_VALIDATE_DUMP; + + ksmbd_genl_family.policy = ksmbd_nl_policy; +} + +static int rpc_context_flags(struct ksmbd_session *sess) +{ + if (user_guest(sess->user)) + return KSMBD_RPC_RESTRICTED_CONTEXT; + return 0; +} + +static void ipc_update_last_active(void) +{ + if (server_conf.ipc_timeout) + server_conf.ipc_last_active = jiffies; +} + +static struct ksmbd_ipc_msg *ipc_msg_alloc(size_t sz) +{ + struct ksmbd_ipc_msg *msg; + size_t msg_sz = sz + sizeof(struct ksmbd_ipc_msg); + + msg = kvzalloc(msg_sz, GFP_KERNEL); + if (msg) + msg->sz = sz; + return msg; +} + +static void ipc_msg_free(struct ksmbd_ipc_msg *msg) +{ + kvfree(msg); +} + +static void ipc_msg_handle_free(int handle) +{ + if (handle >= 0) + ksmbd_release_id(&ipc_ida, handle); +} + +static int handle_response(int type, void *payload, size_t sz) +{ + unsigned int handle = *(unsigned int *)payload; + struct ipc_msg_table_entry *entry; + int ret = 0; + + ipc_update_last_active(); + down_read(&ipc_msg_table_lock); + hash_for_each_possible(ipc_msg_table, entry, ipc_table_hlist, handle) { + if (handle != entry->handle) + continue; + + entry->response = NULL; + /* + * Response message type value should be equal to + * request message type + 1. + */ + if (entry->type + 1 != type) { + pr_err("Waiting for IPC type %d, got %d. Ignore.\n", + entry->type + 1, type); + } + + entry->response = kvzalloc(sz, GFP_KERNEL); + if (!entry->response) { + ret = -ENOMEM; + break; + } + + memcpy(entry->response, payload, sz); + wake_up_interruptible(&entry->wait); + ret = 0; + break; + } + up_read(&ipc_msg_table_lock); + + return ret; +} + +static int ipc_server_config_on_startup(struct ksmbd_startup_request *req) +{ + int ret; + + ksmbd_set_fd_limit(req->file_max); + server_conf.flags = req->flags; + server_conf.signing = req->signing; + server_conf.tcp_port = req->tcp_port; + server_conf.ipc_timeout = req->ipc_timeout * HZ; + server_conf.deadtime = req->deadtime * SMB_ECHO_INTERVAL; + server_conf.share_fake_fscaps = req->share_fake_fscaps; + ksmbd_init_domain(req->sub_auth); + + if (req->smb2_max_read) + init_smb2_max_read_size(req->smb2_max_read); + if (req->smb2_max_write) + init_smb2_max_write_size(req->smb2_max_write); + if (req->smb2_max_trans) + init_smb2_max_trans_size(req->smb2_max_trans); + if (req->smb2_max_credits) + init_smb2_max_credits(req->smb2_max_credits); + if (req->smbd_max_io_size) + init_smbd_max_io_size(req->smbd_max_io_size); + + if (req->max_connections) + server_conf.max_connections = req->max_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); + ret |= ksmbd_tcp_set_interfaces(KSMBD_STARTUP_CONFIG_INTERFACES(req), + req->ifc_list_sz); + if (ret) { + pr_err("Server configuration error: %s %s %s\n", + req->netbios_name, req->server_string, + req->work_group); + return ret; + } + + if (req->min_prot[0]) { + ret = ksmbd_lookup_protocol_idx(req->min_prot); + if (ret >= 0) + server_conf.min_protocol = ret; + } + if (req->max_prot[0]) { + ret = ksmbd_lookup_protocol_idx(req->max_prot); + if (ret >= 0) + server_conf.max_protocol = ret; + } + + if (server_conf.ipc_timeout) + schedule_delayed_work(&ipc_timer_work, server_conf.ipc_timeout); + return 0; +} + +static int handle_startup_event(struct sk_buff *skb, struct genl_info *info) +{ + int ret = 0; + +#ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN + if (!netlink_capable(skb, CAP_NET_ADMIN)) + return -EPERM; +#endif + + if (!ksmbd_ipc_validate_version(info)) + return -EINVAL; + + if (!info->attrs[KSMBD_EVENT_STARTING_UP]) + return -EINVAL; + + mutex_lock(&startup_lock); + if (!ksmbd_server_configurable()) { + mutex_unlock(&startup_lock); + pr_err("Server reset is in progress, can't start daemon\n"); + return -EINVAL; + } + + if (ksmbd_tools_pid) { + if (ksmbd_ipc_heartbeat_request() == 0) { + ret = -EINVAL; + goto out; + } + + pr_err("Reconnect to a new user space daemon\n"); + } else { + struct ksmbd_startup_request *req; + + req = nla_data(info->attrs[info->genlhdr->cmd]); + ret = ipc_server_config_on_startup(req); + if (ret) + goto out; + server_queue_ctrl_init_work(); + } + + ksmbd_tools_pid = info->snd_portid; + ipc_update_last_active(); + +out: + mutex_unlock(&startup_lock); + return ret; +} + +static int handle_unsupported_event(struct sk_buff *skb, struct genl_info *info) +{ + pr_err("Unknown IPC event: %d, ignore.\n", info->genlhdr->cmd); + return -EINVAL; +} + +static int handle_generic_event(struct sk_buff *skb, struct genl_info *info) +{ + void *payload; + int sz; + int type = info->genlhdr->cmd; + +#ifdef CONFIG_SMB_SERVER_CHECK_CAP_NET_ADMIN + if (!netlink_capable(skb, CAP_NET_ADMIN)) + return -EPERM; +#endif + + if (type > KSMBD_EVENT_MAX) { + WARN_ON(1); + return -EINVAL; + } + + if (!ksmbd_ipc_validate_version(info)) + return -EINVAL; + + if (!info->attrs[type]) + return -EINVAL; + + payload = nla_data(info->attrs[info->genlhdr->cmd]); + sz = nla_len(info->attrs[info->genlhdr->cmd]); + return handle_response(type, payload, sz); +} + +static int ipc_msg_send(struct ksmbd_ipc_msg *msg) +{ + struct genlmsghdr *nlh; + struct sk_buff *skb; + int ret = -EINVAL; + + if (!ksmbd_tools_pid) + return ret; + + skb = genlmsg_new(msg->sz, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + nlh = genlmsg_put(skb, 0, 0, &ksmbd_genl_family, 0, msg->type); + if (!nlh) + goto out; + + ret = nla_put(skb, msg->type, msg->sz, msg->payload); + if (ret) { + genlmsg_cancel(skb, nlh); + goto out; + } + + genlmsg_end(skb, nlh); + ret = genlmsg_unicast(&init_net, skb, ksmbd_tools_pid); + if (!ret) + ipc_update_last_active(); + return ret; + +out: + nlmsg_free(skb); + return ret; +} + +static void *ipc_msg_send_request(struct ksmbd_ipc_msg *msg, unsigned int handle) +{ + struct ipc_msg_table_entry entry; + int ret; + + if ((int)handle < 0) + return NULL; + + entry.type = msg->type; + entry.response = NULL; + init_waitqueue_head(&entry.wait); + + down_write(&ipc_msg_table_lock); + entry.handle = handle; + hash_add(ipc_msg_table, &entry.ipc_table_hlist, entry.handle); + up_write(&ipc_msg_table_lock); + + ret = ipc_msg_send(msg); + if (ret) + goto out; + + ret = wait_event_interruptible_timeout(entry.wait, + entry.response != NULL, + IPC_WAIT_TIMEOUT); +out: + down_write(&ipc_msg_table_lock); + hash_del(&entry.ipc_table_hlist); + up_write(&ipc_msg_table_lock); + return entry.response; +} + +static int ksmbd_ipc_heartbeat_request(void) +{ + struct ksmbd_ipc_msg *msg; + int ret; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_heartbeat)); + if (!msg) + return -EINVAL; + + msg->type = KSMBD_EVENT_HEARTBEAT_REQUEST; + ret = ipc_msg_send(msg); + ipc_msg_free(msg); + return ret; +} + +struct ksmbd_login_response *ksmbd_ipc_login_request(const char *account) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_login_request *req; + struct ksmbd_login_response *resp; + + if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) + return NULL; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_login_request)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_LOGIN_REQUEST; + req = (struct ksmbd_login_request *)msg->payload; + req->handle = ksmbd_acquire_id(&ipc_ida); + strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_handle_free(req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_spnego_authen_response * +ksmbd_ipc_spnego_authen_request(const char *spnego_blob, int blob_len) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_spnego_authen_request *req; + struct ksmbd_spnego_authen_response *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_spnego_authen_request) + + blob_len + 1); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_SPNEGO_AUTHEN_REQUEST; + req = (struct ksmbd_spnego_authen_request *)msg->payload; + req->handle = ksmbd_acquire_id(&ipc_ida); + req->spnego_blob_len = blob_len; + memcpy(req->spnego_blob, spnego_blob, blob_len); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_handle_free(req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_tree_connect_response * +ksmbd_ipc_tree_connect_request(struct ksmbd_session *sess, + struct ksmbd_share_config *share, + struct ksmbd_tree_connect *tree_conn, + struct sockaddr *peer_addr) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_tree_connect_request *req; + struct ksmbd_tree_connect_response *resp; + + if (strlen(user_name(sess->user)) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) + return NULL; + + if (strlen(share->name) >= KSMBD_REQ_MAX_SHARE_NAME) + return NULL; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_connect_request)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_TREE_CONNECT_REQUEST; + req = (struct ksmbd_tree_connect_request *)msg->payload; + + req->handle = ksmbd_acquire_id(&ipc_ida); + req->account_flags = sess->user->flags; + req->session_id = sess->id; + req->connect_id = tree_conn->id; + strscpy(req->account, user_name(sess->user), KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); + strscpy(req->share, share->name, KSMBD_REQ_MAX_SHARE_NAME); + snprintf(req->peer_addr, sizeof(req->peer_addr), "%pIS", peer_addr); + + if (peer_addr->sa_family == AF_INET6) + req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_IPV6; + if (test_session_flag(sess, CIFDS_SESSION_FLAG_SMB2)) + req->flags |= KSMBD_TREE_CONN_FLAG_REQUEST_SMB2; + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_handle_free(req->handle); + ipc_msg_free(msg); + return resp; +} + +int ksmbd_ipc_tree_disconnect_request(unsigned long long session_id, + unsigned long long connect_id) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_tree_disconnect_request *req; + int ret; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_tree_disconnect_request)); + if (!msg) + return -ENOMEM; + + msg->type = KSMBD_EVENT_TREE_DISCONNECT_REQUEST; + req = (struct ksmbd_tree_disconnect_request *)msg->payload; + req->session_id = session_id; + req->connect_id = connect_id; + + ret = ipc_msg_send(msg); + ipc_msg_free(msg); + return ret; +} + +int ksmbd_ipc_logout_request(const char *account, int flags) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_logout_request *req; + int ret; + + if (strlen(account) >= KSMBD_REQ_MAX_ACCOUNT_NAME_SZ) + return -EINVAL; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_logout_request)); + if (!msg) + return -ENOMEM; + + msg->type = KSMBD_EVENT_LOGOUT_REQUEST; + req = (struct ksmbd_logout_request *)msg->payload; + req->account_flags = flags; + strscpy(req->account, account, KSMBD_REQ_MAX_ACCOUNT_NAME_SZ); + + ret = ipc_msg_send(msg); + ipc_msg_free(msg); + return ret; +} + +struct ksmbd_share_config_response * +ksmbd_ipc_share_config_request(const char *name) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_share_config_request *req; + struct ksmbd_share_config_response *resp; + + if (strlen(name) >= KSMBD_REQ_MAX_SHARE_NAME) + return NULL; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_share_config_request)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_SHARE_CONFIG_REQUEST; + req = (struct ksmbd_share_config_request *)msg->payload; + req->handle = ksmbd_acquire_id(&ipc_ida); + strscpy(req->share_name, name, KSMBD_REQ_MAX_SHARE_NAME); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_handle_free(req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_open(struct ksmbd_session *sess, int handle) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = handle; + req->flags = ksmbd_session_rpc_method(sess, handle); + req->flags |= KSMBD_RPC_OPEN_METHOD; + req->payload_sz = 0; + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_close(struct ksmbd_session *sess, int handle) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = handle; + req->flags = ksmbd_session_rpc_method(sess, handle); + req->flags |= KSMBD_RPC_CLOSE_METHOD; + req->payload_sz = 0; + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_write(struct ksmbd_session *sess, int handle, + void *payload, size_t payload_sz) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = handle; + req->flags = ksmbd_session_rpc_method(sess, handle); + req->flags |= rpc_context_flags(sess); + req->flags |= KSMBD_RPC_WRITE_METHOD; + req->payload_sz = payload_sz; + memcpy(req->payload, payload, payload_sz); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_read(struct ksmbd_session *sess, int handle) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command)); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = handle; + req->flags = ksmbd_session_rpc_method(sess, handle); + req->flags |= rpc_context_flags(sess); + req->flags |= KSMBD_RPC_READ_METHOD; + req->payload_sz = 0; + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_ioctl(struct ksmbd_session *sess, int handle, + void *payload, size_t payload_sz) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = handle; + req->flags = ksmbd_session_rpc_method(sess, handle); + req->flags |= rpc_context_flags(sess); + req->flags |= KSMBD_RPC_IOCTL_METHOD; + req->payload_sz = payload_sz; + memcpy(req->payload, payload, payload_sz); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_free(msg); + return resp; +} + +struct ksmbd_rpc_command *ksmbd_rpc_rap(struct ksmbd_session *sess, void *payload, + size_t payload_sz) +{ + struct ksmbd_ipc_msg *msg; + struct ksmbd_rpc_command *req; + struct ksmbd_rpc_command *resp; + + msg = ipc_msg_alloc(sizeof(struct ksmbd_rpc_command) + payload_sz + 1); + if (!msg) + return NULL; + + msg->type = KSMBD_EVENT_RPC_REQUEST; + req = (struct ksmbd_rpc_command *)msg->payload; + req->handle = ksmbd_acquire_id(&ipc_ida); + req->flags = rpc_context_flags(sess); + req->flags |= KSMBD_RPC_RAP_METHOD; + req->payload_sz = payload_sz; + memcpy(req->payload, payload, payload_sz); + + resp = ipc_msg_send_request(msg, req->handle); + ipc_msg_handle_free(req->handle); + ipc_msg_free(msg); + return resp; +} + +static int __ipc_heartbeat(void) +{ + unsigned long delta; + + if (!ksmbd_server_running()) + return 0; + + if (time_after(jiffies, server_conf.ipc_last_active)) { + delta = (jiffies - server_conf.ipc_last_active); + } else { + ipc_update_last_active(); + schedule_delayed_work(&ipc_timer_work, + server_conf.ipc_timeout); + return 0; + } + + if (delta < server_conf.ipc_timeout) { + schedule_delayed_work(&ipc_timer_work, + server_conf.ipc_timeout - delta); + return 0; + } + + if (ksmbd_ipc_heartbeat_request() == 0) { + schedule_delayed_work(&ipc_timer_work, + server_conf.ipc_timeout); + return 0; + } + + mutex_lock(&startup_lock); + WRITE_ONCE(server_conf.state, SERVER_STATE_RESETTING); + server_conf.ipc_last_active = 0; + ksmbd_tools_pid = 0; + pr_err("No IPC daemon response for %lus\n", delta / HZ); + mutex_unlock(&startup_lock); + return -EINVAL; +} + +static void ipc_timer_heartbeat(struct work_struct *w) +{ + if (__ipc_heartbeat()) + server_queue_ctrl_reset_work(); +} + +int ksmbd_ipc_id_alloc(void) +{ + return ksmbd_acquire_id(&ipc_ida); +} + +void ksmbd_rpc_id_free(int handle) +{ + ksmbd_release_id(&ipc_ida, handle); +} + +void ksmbd_ipc_release(void) +{ + cancel_delayed_work_sync(&ipc_timer_work); + genl_unregister_family(&ksmbd_genl_family); +} + +void ksmbd_ipc_soft_reset(void) +{ + mutex_lock(&startup_lock); + ksmbd_tools_pid = 0; + cancel_delayed_work_sync(&ipc_timer_work); + mutex_unlock(&startup_lock); +} + +int ksmbd_ipc_init(void) +{ + int ret = 0; + + ksmbd_nl_init_fixup(); + INIT_DELAYED_WORK(&ipc_timer_work, ipc_timer_heartbeat); + + ret = genl_register_family(&ksmbd_genl_family); + if (ret) { + pr_err("Failed to register KSMBD netlink interface %d\n", ret); + cancel_delayed_work_sync(&ipc_timer_work); + } + + return ret; +} |