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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <sys/stat.h> | |
16 | #include <sys/utsname.h> | |
17 | #include <iostream> | |
18 | #include <string> | |
19 | using namespace std; | |
20 | ||
21 | #include "common/config.h" | |
22 | #include "common/errno.h" | |
23 | ||
24 | #include "client/Client.h" | |
25 | #include "client/fuse_ll.h" | |
26 | ||
27 | #include "msg/Messenger.h" | |
28 | ||
29 | #include "mon/MonClient.h" | |
30 | ||
31 | #include "common/Timer.h" | |
32 | #include "common/ceph_argparse.h" | |
33 | #if defined(__linux__) | |
34 | #include "common/linux_version.h" | |
35 | #endif | |
36 | #include "global/global_init.h" | |
37 | #include "global/signal_handler.h" | |
38 | #include "common/Preforker.h" | |
39 | #include "common/safe_io.h" | |
40 | ||
41 | #include <sys/types.h> | |
42 | #include <fcntl.h> | |
43 | ||
44 | #include <fuse.h> | |
45 | ||
46 | #define dout_context g_ceph_context | |
47 | ||
48 | static void fuse_usage() | |
49 | { | |
50 | const char* argv[] = { | |
51 | "ceph-fuse", | |
52 | "-h", | |
53 | }; | |
54 | struct fuse_args args = FUSE_ARGS_INIT(2, (char**)argv); | |
55 | if (fuse_parse_cmdline(&args, NULL, NULL, NULL) == -1) { | |
56 | derr << "fuse_parse_cmdline failed." << dendl; | |
57 | } | |
58 | assert(args.allocated); | |
59 | fuse_opt_free_args(&args); | |
60 | } | |
61 | ||
62 | void usage() | |
63 | { | |
64 | cout << | |
c07f9fc5 FG |
65 | "usage: ceph-fuse [-n client.username] [-m mon-ip-addr:mon-port] <mount point> [OPTIONS]\n" |
66 | " --client_mountpoint/-r <sub_directory>\n" | |
67 | " use sub_directory as the mounted root, rather than the full Ceph tree.\n" | |
7c673cae FG |
68 | "\n"; |
69 | fuse_usage(); | |
70 | generic_client_usage(); | |
71 | } | |
72 | ||
73 | int main(int argc, const char **argv, const char *envp[]) { | |
74 | int filer_flags = 0; | |
75 | //cerr << "ceph-fuse starting " << myrank << "/" << world << std::endl; | |
76 | std::vector<const char*> args; | |
77 | argv_to_vec(argc, argv, args); | |
78 | if (args.empty()) { | |
79 | usage(); | |
80 | } | |
81 | env_to_vec(args); | |
82 | ||
83 | std::vector<const char*> def_args{"--pid-file="}; | |
84 | ||
85 | auto cct = global_init(&def_args, args, CEPH_ENTITY_TYPE_CLIENT, | |
86 | CODE_ENVIRONMENT_DAEMON, | |
87 | CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS); | |
88 | for (std::vector<const char*>::iterator i = args.begin(); i != args.end(); ) { | |
89 | if (ceph_argparse_double_dash(args, i)) { | |
90 | break; | |
91 | } else if (ceph_argparse_flag(args, i, "--localize-reads", (char*)NULL)) { | |
92 | cerr << "setting CEPH_OSD_FLAG_LOCALIZE_READS" << std::endl; | |
93 | filer_flags |= CEPH_OSD_FLAG_LOCALIZE_READS; | |
94 | } else if (ceph_argparse_flag(args, i, "-h", "--help", (char*)NULL)) { | |
95 | usage(); | |
28e407b8 AA |
96 | } else if (ceph_argparse_flag(args, i, "-V", (char*)nullptr)) { |
97 | const char* tmpargv[] = { | |
98 | "ceph-fuse", | |
99 | "-V" | |
100 | }; | |
101 | ||
102 | struct fuse_args fargs = FUSE_ARGS_INIT(2, (char**)tmpargv); | |
103 | if (fuse_parse_cmdline(&fargs, nullptr, nullptr, nullptr) == -1) { | |
104 | derr << "fuse_parse_cmdline failed." << dendl; | |
105 | } | |
106 | assert(fargs.allocated); | |
107 | fuse_opt_free_args(&fargs); | |
108 | exit(0); | |
7c673cae FG |
109 | } else { |
110 | ++i; | |
111 | } | |
112 | } | |
113 | ||
114 | // args for fuse | |
115 | const char **newargv; | |
116 | int newargc; | |
117 | vec_to_argv(argv[0], args, &newargc, &newargv); | |
118 | ||
119 | // FUSE will chdir("/"); be ready. | |
120 | g_ceph_context->_conf->set_val("chdir", "/"); | |
121 | g_ceph_context->_conf->apply_changes(NULL); | |
122 | ||
123 | // check for 32-bit arch | |
124 | #ifndef __LP64__ | |
125 | cerr << std::endl; | |
126 | cerr << "WARNING: Ceph inode numbers are 64 bits wide, and FUSE on 32-bit kernels does" << std::endl; | |
127 | cerr << " not cope well with that situation. Expect to crash shortly." << std::endl; | |
128 | cerr << std::endl; | |
129 | #endif | |
130 | ||
131 | Preforker forker; | |
132 | if (g_conf->daemonize) { | |
133 | global_init_prefork(g_ceph_context); | |
134 | int r; | |
135 | string err; | |
136 | r = forker.prefork(err); | |
137 | if (r < 0 || forker.is_parent()) { | |
138 | // Start log if current process is about to exit. Otherwise, we hit an assert | |
139 | // in the Ceph context destructor. | |
140 | g_ceph_context->_log->start(); | |
141 | } | |
142 | if (r < 0) { | |
143 | cerr << "ceph-fuse " << err << std::endl; | |
144 | return r; | |
145 | } | |
146 | if (forker.is_parent()) { | |
147 | r = forker.parent_wait(err); | |
148 | if (r < 0) { | |
149 | cerr << "ceph-fuse " << err << std::endl; | |
150 | } | |
151 | return r; | |
152 | } | |
153 | global_init_postfork_start(cct.get()); | |
154 | } | |
155 | ||
156 | { | |
157 | common_init_finish(g_ceph_context); | |
158 | ||
159 | //cout << "child, mounting" << std::endl; | |
160 | class RemountTest : public Thread { | |
161 | public: | |
162 | CephFuse *cfuse; | |
163 | Client *client; | |
164 | RemountTest() : cfuse(NULL), client(NULL) {} | |
165 | void init(CephFuse *cf, Client *cl) { | |
166 | cfuse = cf; | |
167 | client = cl; | |
168 | } | |
169 | ~RemountTest() override {} | |
170 | void *entry() override { | |
171 | #if defined(__linux__) | |
172 | int ver = get_linux_version(); | |
173 | assert(ver != 0); | |
b32b8144 FG |
174 | bool client_try_dentry_invalidate = g_conf->get_val<bool>( |
175 | "client_try_dentry_invalidate"); | |
176 | bool can_invalidate_dentries = | |
177 | client_try_dentry_invalidate && ver < KERNEL_VERSION(3, 18, 0); | |
7c673cae | 178 | int tr = client->test_dentry_handling(can_invalidate_dentries); |
b32b8144 FG |
179 | bool client_die_on_failed_dentry_invalidate = g_conf->get_val<bool>( |
180 | "client_die_on_failed_dentry_invalidate"); | |
181 | if (tr != 0 && client_die_on_failed_dentry_invalidate) { | |
7c673cae FG |
182 | cerr << "ceph-fuse[" << getpid() |
183 | << "]: fuse failed dentry invalidate/remount test with error " | |
184 | << cpp_strerror(tr) << ", stopping" << std::endl; | |
185 | ||
186 | char buf[5050]; | |
187 | string mountpoint = cfuse->get_mount_point(); | |
188 | snprintf(buf, sizeof(buf), "fusermount -u -z %s", mountpoint.c_str()); | |
189 | int umount_r = system(buf); | |
190 | if (umount_r) { | |
191 | if (umount_r != -1) { | |
192 | if (WIFEXITED(umount_r)) { | |
193 | umount_r = WEXITSTATUS(umount_r); | |
194 | cerr << "got error " << umount_r | |
195 | << " when unmounting Ceph on failed remount test!" << std::endl; | |
196 | } else { | |
197 | cerr << "attempt to umount on failed remount test failed (on a signal?)" << std::endl; | |
198 | } | |
199 | } else { | |
200 | cerr << "system() invocation failed during remount test" << std::endl; | |
201 | } | |
202 | } | |
203 | } | |
204 | return reinterpret_cast<void*>(tr); | |
205 | #else | |
206 | return reinterpret_cast<void*>(0); | |
207 | #endif | |
208 | } | |
209 | } tester; | |
210 | ||
211 | ||
212 | // get monmap | |
213 | Messenger *messenger = NULL; | |
214 | StandaloneClient *client; | |
215 | CephFuse *cfuse; | |
216 | UserPerm perms; | |
217 | int tester_r = 0; | |
218 | void *tester_rp = NULL; | |
219 | ||
220 | MonClient *mc = new MonClient(g_ceph_context); | |
221 | int r = mc->build_initial_monmap(); | |
222 | if (r == -EINVAL) | |
223 | usage(); | |
224 | if (r < 0) | |
225 | goto out_mc_start_failed; | |
226 | ||
227 | // start up network | |
228 | messenger = Messenger::create_client_messenger(g_ceph_context, "client"); | |
229 | messenger->set_default_policy(Messenger::Policy::lossy_client(0)); | |
230 | messenger->set_policy(entity_name_t::TYPE_MDS, | |
231 | Messenger::Policy::lossless_client(0)); | |
232 | ||
233 | client = new StandaloneClient(messenger, mc); | |
234 | if (filer_flags) { | |
235 | client->set_filer_flags(filer_flags); | |
236 | } | |
237 | ||
238 | cfuse = new CephFuse(client, forker.get_signal_fd()); | |
239 | ||
240 | r = cfuse->init(newargc, newargv); | |
241 | if (r != 0) { | |
242 | cerr << "ceph-fuse[" << getpid() << "]: fuse failed to initialize" << std::endl; | |
243 | goto out_messenger_start_failed; | |
244 | } | |
245 | ||
246 | cerr << "ceph-fuse[" << getpid() << "]: starting ceph client" << std::endl; | |
247 | r = messenger->start(); | |
248 | if (r < 0) { | |
249 | cerr << "ceph-fuse[" << getpid() << "]: ceph messenger failed with " << cpp_strerror(-r) << std::endl; | |
250 | goto out_messenger_start_failed; | |
251 | } | |
252 | ||
253 | init_async_signal_handler(); | |
254 | register_async_signal_handler(SIGHUP, sighup_handler); | |
255 | ||
256 | // start client | |
257 | r = client->init(); | |
258 | if (r < 0) { | |
259 | cerr << "ceph-fuse[" << getpid() << "]: ceph client failed with " << cpp_strerror(-r) << std::endl; | |
260 | goto out_init_failed; | |
261 | } | |
262 | ||
263 | client->update_metadata("mount_point", cfuse->get_mount_point()); | |
264 | perms = client->pick_my_perms(); | |
265 | // start up fuse | |
266 | // use my argc, argv (make sure you pass a mount point!) | |
267 | r = client->mount(g_conf->client_mountpoint.c_str(), perms, | |
268 | g_ceph_context->_conf->fuse_require_active_mds); | |
269 | if (r < 0) { | |
28e407b8 | 270 | if (r == CEPH_FUSE_NO_MDS_UP) { |
7c673cae | 271 | cerr << "ceph-fuse[" << getpid() << "]: probably no MDS server is up?" << std::endl; |
28e407b8 AA |
272 | } |
273 | cerr << "ceph-fuse[" << getpid() << "]: ceph mount failed with " << cpp_strerror(-r) << std::endl;r = EXIT_FAILURE; | |
274 | r = EXIT_FAILURE; | |
7c673cae FG |
275 | goto out_shutdown; |
276 | } | |
277 | ||
278 | r = cfuse->start(); | |
279 | if (r != 0) { | |
280 | cerr << "ceph-fuse[" << getpid() << "]: fuse failed to start" << std::endl; | |
281 | goto out_client_unmount; | |
282 | } | |
283 | ||
284 | cerr << "ceph-fuse[" << getpid() << "]: starting fuse" << std::endl; | |
285 | tester.init(cfuse, client); | |
286 | tester.create("tester"); | |
287 | r = cfuse->loop(); | |
288 | tester.join(&tester_rp); | |
289 | tester_r = static_cast<int>(reinterpret_cast<uint64_t>(tester_rp)); | |
290 | cerr << "ceph-fuse[" << getpid() << "]: fuse finished with error " << r | |
291 | << " and tester_r " << tester_r <<std::endl; | |
292 | ||
293 | ||
294 | out_client_unmount: | |
295 | client->unmount(); | |
296 | cfuse->finalize(); | |
297 | out_shutdown: | |
298 | client->shutdown(); | |
299 | out_init_failed: | |
300 | unregister_async_signal_handler(SIGHUP, sighup_handler); | |
301 | shutdown_async_signal_handler(); | |
302 | ||
303 | // wait for messenger to finish | |
304 | messenger->shutdown(); | |
305 | messenger->wait(); | |
306 | out_messenger_start_failed: | |
307 | delete cfuse; | |
308 | delete client; | |
309 | delete messenger; | |
310 | out_mc_start_failed: | |
311 | free(newargv); | |
312 | delete mc; | |
313 | //cout << "child done" << std::endl; | |
314 | return forker.signal_exit(r); | |
315 | } | |
316 | } | |
317 |