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427 lines
9.7 KiB
427 lines
9.7 KiB
/*
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* rpcd-lxc-plugin
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*
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* Copyright (C) 2014 Cisco Systems, Inc.
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* Author: Luka Perkov <luka@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <libubus.h>
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#include <lxc/lxccontainer.h>
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#include <rpcd/plugin.h>
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static struct blob_buf buf;
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struct rpc_lxc {
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/* ubus options */
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char *name;
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char *config;
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/* lxc container */
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struct lxc_container *container;
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};
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enum {
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RPC_LXC_NAME,
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RPC_LXC_CONFIG,
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__RPC_LXC_MAX,
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};
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enum {
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RPC_LXC_SHUTDOWN_NAME,
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RPC_LXC_SHUTDOWN_CONFIG,
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RPC_LXC_SHUTDOWN_TIMEOUT,
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__RPC_LXC_SHUTDOWN_MAX,
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};
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enum {
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RPC_LXC_RENAME_NAME,
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RPC_LXC_RENAME_CONFIG,
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RPC_LXC_RENAME_NEWNAME,
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__RPC_LXC_RENAME_MAX,
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};
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static const struct blobmsg_policy rpc_lxc_min_policy[__RPC_LXC_MAX] = {
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[RPC_LXC_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
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[RPC_LXC_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
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};
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static const struct blobmsg_policy rpc_lxc_shutdown_policy[__RPC_LXC_SHUTDOWN_MAX] = {
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[RPC_LXC_SHUTDOWN_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
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[RPC_LXC_SHUTDOWN_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
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[RPC_LXC_SHUTDOWN_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
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};
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static const struct blobmsg_policy rpc_lxc_rename_policy[__RPC_LXC_RENAME_MAX] = {
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[RPC_LXC_RENAME_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
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[RPC_LXC_RENAME_CONFIG] = { .name = "config", .type = BLOBMSG_TYPE_STRING },
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[RPC_LXC_RENAME_NEWNAME] = { .name = "newname", .type = BLOBMSG_TYPE_STRING },
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};
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static struct rpc_lxc *
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rpc_lxc_init(struct blob_attr *tb[__RPC_LXC_MAX])
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{
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struct rpc_lxc *l = NULL;
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l = calloc(1, sizeof(struct rpc_lxc));
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if (!l) return NULL;
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if (tb[RPC_LXC_NAME]) {
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l->name = blobmsg_data(tb[RPC_LXC_NAME]);
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} else {
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goto error;
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}
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if (tb[RPC_LXC_CONFIG]) {
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l->config = blobmsg_data(tb[RPC_LXC_CONFIG]);
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} else {
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l->config = NULL;
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}
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l->container = lxc_container_new(l->name, l->config);
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if (!l->container) {
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goto error;
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}
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return l;
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error:
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free(l);
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return NULL;
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}
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static void
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rpc_lxc_done(struct rpc_lxc *l)
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{
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if (l) {
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lxc_container_put(l->container);
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free(l);
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}
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return;
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}
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static int
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rpc_lxc_start(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->start(l->container, 0, NULL)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_reboot(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->reboot(l->container)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_shutdown(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_SHUTDOWN_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_shutdown_policy, __RPC_LXC_SHUTDOWN_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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/* define default timeout */
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int timeout = 30;
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if (tb[RPC_LXC_SHUTDOWN_TIMEOUT]) {
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timeout = blobmsg_get_u32(tb[RPC_LXC_SHUTDOWN_TIMEOUT]);
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}
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if (!l->container->shutdown(l->container, timeout)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_stop(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->stop(l->container)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_freeze(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->freeze(l->container)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_unfreeze(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->unfreeze(l->container)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_rename(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_RENAME_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_rename_policy, __RPC_LXC_RENAME_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (!tb[RPC_LXC_RENAME_NEWNAME]) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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if (l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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char *newname = blobmsg_data(tb[RPC_LXC_RENAME_NEWNAME]);
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if (!newname || !l->container->rename(l->container, newname)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_destroy(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct blob_attr *tb[__RPC_LXC_MAX];
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struct rpc_lxc *l = NULL;
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int rc;
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blobmsg_parse(rpc_lxc_min_policy, __RPC_LXC_MAX, tb, blob_data(msg), blob_len(msg));
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l = rpc_lxc_init(tb);
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if (!l) return UBUS_STATUS_INVALID_ARGUMENT;
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if (l->container->is_running(l->container)) {
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rc = UBUS_STATUS_UNKNOWN_ERROR;
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goto out;
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}
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if (!l->container->destroy(l->container)) {
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rc = UBUS_STATUS_INVALID_ARGUMENT;
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goto out;
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}
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rc = UBUS_STATUS_OK;
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out:
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rpc_lxc_done(l);
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return rc;
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}
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static int
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rpc_lxc_list(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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blob_buf_init(&buf, 0);
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int rc;
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char **names;
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struct lxc_container **cret;
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rc = list_all_containers(NULL, &names, &cret);
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if (rc == -1)
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return UBUS_STATUS_UNKNOWN_ERROR;
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for (int i = 0; i < rc; i++) {
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struct lxc_container *c = cret[i];
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blobmsg_add_string(&buf, names[i], c->state(c));
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free(names[i]);
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lxc_container_put(c);
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}
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ubus_send_reply(ctx, req, buf.head);
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return UBUS_STATUS_OK;
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}
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static int
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rpc_lxc_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
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{
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static const struct ubus_method lxc_methods[] = {
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UBUS_METHOD("start", rpc_lxc_start, rpc_lxc_min_policy),
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UBUS_METHOD("reboot", rpc_lxc_reboot, rpc_lxc_min_policy),
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UBUS_METHOD("shutdown", rpc_lxc_shutdown, rpc_lxc_shutdown_policy),
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UBUS_METHOD("stop", rpc_lxc_stop, rpc_lxc_min_policy),
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UBUS_METHOD("freeze", rpc_lxc_freeze, rpc_lxc_min_policy),
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UBUS_METHOD("unfreeze", rpc_lxc_unfreeze, rpc_lxc_min_policy),
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UBUS_METHOD("rename", rpc_lxc_rename, rpc_lxc_rename_policy),
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UBUS_METHOD("destroy", rpc_lxc_destroy, rpc_lxc_min_policy),
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UBUS_METHOD_NOARG("list", rpc_lxc_list),
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};
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static struct ubus_object_type lxc_type =
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UBUS_OBJECT_TYPE("luci-rpc-lxc", lxc_methods);
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static struct ubus_object obj = {
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.name = "lxc",
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.type = &lxc_type,
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.methods = lxc_methods,
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.n_methods = ARRAY_SIZE(lxc_methods),
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};
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return ubus_add_object(ctx, &obj);
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}
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struct rpc_plugin rpc_plugin = {
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.init = rpc_lxc_api_init
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};
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