--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "include/int_types.h"
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+
+#include <iostream>
+#include <boost/regex.hpp>
+
+#include "common/Preforker.h"
+#include "common/ceph_argparse.h"
+#include "common/config.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "global/global_init.h"
+#include "global/signal_handler.h"
+
+#include "include/rados/librados.hpp"
+#include "include/rbd/librbd.hpp"
+
+#include "Driver.h"
+#include "Server.h"
+#include "Watcher.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd-ggate: " << __func__ << ": "
+
+static void usage() {
+ std::cout << "Usage: rbd-ggate [options] map <image-or-snap-spec> Map an image to ggate device\n"
+ << " unmap <device path> Unmap ggate device\n"
+ << " list List mapped ggate devices\n"
+ << "Options:\n"
+ << " --device <device path> Specify ggate device path\n"
+ << " --read-only Map readonly\n"
+ << " --exclusive Forbid writes by other clients\n"
+ << std::endl;
+ generic_server_usage();
+}
+
+static std::string devpath, poolname("rbd"), imgname, snapname;
+static bool readonly = false;
+static bool exclusive = false;
+
+static std::unique_ptr<rbd::ggate::Driver> drv;
+
+static void handle_signal(int signum)
+{
+ derr << "*** Got signal " << sig_str(signum) << " ***" << dendl;
+
+ assert(signum == SIGINT || signum == SIGTERM);
+ assert(drv);
+
+ drv->shut_down();
+}
+
+static int do_map(int argc, const char *argv[])
+{
+ int r;
+
+ librados::Rados rados;
+ librbd::RBD rbd;
+ librados::IoCtx io_ctx;
+ librbd::Image image;
+
+ librbd::image_info_t info;
+ std::string desc;
+
+ Preforker forker;
+
+ vector<const char*> args;
+ argv_to_vec(argc, argv, args);
+ env_to_vec(args);
+
+ auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT,
+ CODE_ENVIRONMENT_DAEMON,
+ CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS);
+ g_ceph_context->_conf->set_val_or_die("pid_file", "");
+
+ if (global_init_prefork(g_ceph_context) >= 0) {
+ std::string err;
+ r = forker.prefork(err);
+ if (r < 0) {
+ cerr << err << std::endl;
+ return r;
+ }
+
+ if (forker.is_parent()) {
+ global_init_postfork_start(g_ceph_context);
+ if (forker.parent_wait(err) != 0) {
+ return -ENXIO;
+ }
+ return 0;
+ }
+ }
+
+ common_init_finish(g_ceph_context);
+ global_init_chdir(g_ceph_context);
+
+ std::string devname = (devpath.compare(0, 5, "/dev/") == 0) ?
+ devpath.substr(5) : devpath;
+ std::unique_ptr<rbd::ggate::Watcher> watcher;
+ uint64_t handle;
+
+ r = rados.init_with_context(g_ceph_context);
+ if (r < 0) {
+ goto done;
+ }
+
+ r = rados.connect();
+ if (r < 0) {
+ goto done;
+ }
+
+ r = rados.ioctx_create(poolname.c_str(), io_ctx);
+ if (r < 0) {
+ goto done;
+ }
+
+ r = rbd.open(io_ctx, image, imgname.c_str());
+ if (r < 0) {
+ goto done;
+ }
+
+ if (exclusive) {
+ r = image.lock_acquire(RBD_LOCK_MODE_EXCLUSIVE);
+ if (r < 0) {
+ cerr << "rbd-ggate: failed to acquire exclusive lock: " << cpp_strerror(r)
+ << std::endl;
+ goto done;
+ }
+ }
+
+ desc = "RBD " + poolname + "/" + imgname;
+
+ if (!snapname.empty()) {
+ r = image.snap_set(snapname.c_str());
+ if (r < 0) {
+ goto done;
+ }
+ readonly = true;
+ desc += "@" + snapname;
+ }
+
+ r = image.stat(info, sizeof(info));
+ if (r < 0) {
+ goto done;
+ }
+
+ rbd::ggate::Driver::load();
+ drv.reset(new rbd::ggate::Driver(devname, 512, info.size, readonly, desc));
+ r = drv->init();
+ if (r < 0) {
+ r = -errno;
+ goto done;
+ }
+
+ watcher.reset(new rbd::ggate::Watcher(drv.get(), io_ctx, image, info.size));
+ r = image.update_watch(watcher.get(), &handle);
+ if (r < 0) {
+ drv->shut_down();
+ goto done;
+ }
+
+ std::cout << "/dev/" << drv->get_devname() << std::endl;
+
+ if (g_conf->daemonize) {
+ forker.daemonize();
+ global_init_postfork_start(g_ceph_context);
+ global_init_postfork_finish(g_ceph_context);
+ }
+
+ init_async_signal_handler();
+ register_async_signal_handler(SIGHUP, sighup_handler);
+ register_async_signal_handler_oneshot(SIGINT, handle_signal);
+ register_async_signal_handler_oneshot(SIGTERM, handle_signal);
+
+ rbd::ggate::Server(drv.get(), image).run();
+
+ unregister_async_signal_handler(SIGHUP, sighup_handler);
+ unregister_async_signal_handler(SIGINT, handle_signal);
+ unregister_async_signal_handler(SIGTERM, handle_signal);
+ shutdown_async_signal_handler();
+
+ r = image.update_unwatch(handle);
+ assert(r == 0);
+
+done:
+ image.close();
+ io_ctx.close();
+ rados.shutdown();
+
+ forker.exit(r < 0 ? EXIT_FAILURE : 0);
+ // Unreachable;
+ return r;
+}
+
+static int do_unmap()
+{
+ std::string devname = (devpath.compare(0, 5, "/dev/") == 0) ?
+ devpath.substr(5) : devpath;
+
+ int r = rbd::ggate::Driver::kill(devname);
+ if (r < 0) {
+ cerr << "rbd-ggate: failed to destroy " << devname << ": "
+ << cpp_strerror(r) << std::endl;
+ return r;
+ }
+
+ return 0;
+}
+
+static int parse_imgpath(const std::string &imgpath)
+{
+ boost::regex pattern("^(?:([^/@]+)/)?([^/@]+)(?:@([^/@]+))?$");
+ boost::smatch match;
+ if (!boost::regex_match(imgpath, match, pattern)) {
+ std::cerr << "rbd-ggate: invalid spec '" << imgpath << "'" << std::endl;
+ return -EINVAL;
+ }
+
+ if (match[1].matched) {
+ poolname = match[1];
+ }
+
+ imgname = match[2];
+
+ if (match[3].matched) {
+ snapname = match[3];
+ }
+
+ return 0;
+}
+
+static int do_list()
+{
+ rbd::ggate::Driver::load();
+
+ std::list<std::string> devs;
+ int r = rbd::ggate::Driver::list(devs);
+ if (r < 0) {
+ return -r;
+ }
+
+ for (auto &devname : devs) {
+ cout << "/dev/" << devname << std::endl;
+ }
+ return 0;
+}
+
+int main(int argc, const char *argv[]) {
+ int r;
+ enum {
+ None,
+ Connect,
+ Disconnect,
+ List
+ } cmd = None;
+
+ vector<const char*> args;
+
+ argv_to_vec(argc, argv, args);
+ md_config_t().parse_argv(args);
+
+ std::vector<const char*>::iterator i;
+
+ for (i = args.begin(); i != args.end(); ) {
+ if (ceph_argparse_flag(args, i, "-h", "--help", (char*)NULL)) {
+ usage();
+ return 0;
+ } else if (ceph_argparse_witharg(args, i, &devpath, "--device",
+ (char *)NULL)) {
+ } else if (ceph_argparse_flag(args, i, "--read-only", (char *)NULL)) {
+ readonly = true;
+ } else if (ceph_argparse_flag(args, i, "--exclusive", (char *)NULL)) {
+ exclusive = true;
+ } else {
+ ++i;
+ }
+ }
+
+ if (args.begin() != args.end()) {
+ if (strcmp(*args.begin(), "map") == 0) {
+ cmd = Connect;
+ } else if (strcmp(*args.begin(), "unmap") == 0) {
+ cmd = Disconnect;
+ } else if (strcmp(*args.begin(), "list") == 0) {
+ cmd = List;
+ } else {
+ cerr << "rbd-ggate: unknown command: " << *args.begin() << std::endl;
+ return EXIT_FAILURE;
+ }
+ args.erase(args.begin());
+ }
+
+ if (cmd == None) {
+ cerr << "rbd-ggate: must specify command" << std::endl;
+ return EXIT_FAILURE;
+ }
+
+ switch (cmd) {
+ case Connect:
+ if (args.begin() == args.end()) {
+ cerr << "rbd-ggate: must specify image-or-snap-spec" << std::endl;
+ return EXIT_FAILURE;
+ }
+ if (parse_imgpath(string(*args.begin())) < 0)
+ return EXIT_FAILURE;
+ args.erase(args.begin());
+ break;
+ case Disconnect:
+ if (args.begin() == args.end()) {
+ cerr << "rbd-ggate: must specify ggate device path" << std::endl;
+ return EXIT_FAILURE;
+ }
+ devpath = *args.begin();
+ args.erase(args.begin());
+ break;
+ default:
+ break;
+ }
+
+ if (args.begin() != args.end()) {
+ cerr << "rbd-ggate: unknown args: " << *args.begin() << std::endl;
+ return EXIT_FAILURE;
+ }
+
+ switch (cmd) {
+ case Connect:
+ if (imgname.empty()) {
+ cerr << "rbd-ggate: image name was not specified" << std::endl;
+ return EXIT_FAILURE;
+ }
+
+ r = do_map(argc, argv);
+ if (r < 0)
+ return EXIT_FAILURE;
+ break;
+ case Disconnect:
+ r = do_unmap();
+ if (r < 0)
+ return EXIT_FAILURE;
+ break;
+ case List:
+ r = do_list();
+ if (r < 0)
+ return EXIT_FAILURE;
+ break;
+ default:
+ usage();
+ return EXIT_FAILURE;
+ }
+
+ return 0;
+}
Code Review / stor4nfv.git / blobdiff