GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/cache_plugin/channel.cc
Date: 2024-04-28 02:33:07
Exec Total Coverage
Lines: 477 589 81.0%
Branches: 342 805 42.5%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4 #include "cvmfs_config.h"
5 #include "channel.h"
6
7 #include <errno.h>
8 #include <poll.h>
9 #include <signal.h>
10 #include <sys/socket.h>
11 #include <sys/un.h>
12 #include <unistd.h>
13
14 #include <cassert>
15 #include <cstring>
16 #include <vector>
17
18 #include "util/concurrency.h"
19 #include "util/exception.h"
20 #include "util/logging.h"
21 #include "util/platform.h"
22 #include "util/pointer.h"
23 #include "util/posix.h"
24 #include "util/smalloc.h"
25 #include "util/string.h"
26
27 using namespace std; // NOLINT
28
29
30 SessionCtx *SessionCtx::instance_ = NULL;
31
32 ✗ void SessionCtx::CleanupInstance() {
33 ✗ delete instance_;
34 ✗ instance_ = NULL;
35 }
36
37
38 1 SessionCtx::SessionCtx() {
39 1 lock_tls_blocks_ = reinterpret_cast<pthread_mutex_t *>(
40 1 smalloc(sizeof(pthread_mutex_t)));
41 1 int retval = pthread_mutex_init(lock_tls_blocks_, NULL);
42
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 1 assert(retval == 0);
43 1 }
44
45
46 ✗ SessionCtx::~SessionCtx() {
47 ✗ pthread_mutex_destroy(lock_tls_blocks_);
48 ✗ free(lock_tls_blocks_);
49
50 ✗ for (unsigned i = 0; i < tls_blocks_.size(); ++i) {
51 ✗ delete tls_blocks_[i];
52 }
53
54 ✗ int retval = pthread_key_delete(thread_local_storage_);
55 ✗ assert(retval == 0);
56 }
57
58
59 9614 SessionCtx *SessionCtx::GetInstance() {
60
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 9614 if (instance_ == NULL) {
61 1 instance_ = new SessionCtx();
62 int retval =
63 1 pthread_key_create(&instance_->thread_local_storage_, TlsDestructor);
64
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 1 assert(retval == 0);
65 }
66
67 9614 return instance_;
68 }
69
70
71 2776 void SessionCtx::Get(uint64_t *id, char **reponame, char **client_instance) {
72 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
73 2776 pthread_getspecific(thread_local_storage_));
74
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 2776 if ((tls == NULL) || !tls->is_set) {
75 1 *id = 0;
76 1 *reponame = NULL;
77 1 *client_instance = NULL;
78 } else {
79 2775 *id = tls->id;
80 2775 *reponame = tls->reponame;
81 2775 *client_instance = tls->client_instance;
82 }
83 2776 }
84
85
86 ✗ bool SessionCtx::IsSet() {
87 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
88 ✗ pthread_getspecific(thread_local_storage_));
89 ✗ if (tls == NULL)
90 ✗ return false;
91
92 ✗ return tls->is_set;
93 }
94
95
96 3419 void SessionCtx::Set(uint64_t id, char *reponame, char *client_instance) {
97 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
98 3419 pthread_getspecific(thread_local_storage_));
99
100
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 3419 if (tls == NULL) {
101
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 15 tls = new ThreadLocalStorage(id, reponame, client_instance);
102 15 int retval = pthread_setspecific(thread_local_storage_, tls);
103
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 15 assert(retval == 0);
104 15 MutexLockGuard lock_guard(lock_tls_blocks_);
105
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 15 tls_blocks_.push_back(tls);
106 15 } else {
107 3404 tls->id = id;
108 3404 tls->reponame = reponame;
109 3404 tls->client_instance = client_instance;
110 3404 tls->is_set = true;
111 }
112 3419 }
113
114
115 15 void SessionCtx::TlsDestructor(void *data) {
116 15 ThreadLocalStorage *tls = static_cast<SessionCtx::ThreadLocalStorage *>(data);
117
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 15 delete tls;
118
119
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 15 assert(instance_);
120 15 MutexLockGuard lock_guard(instance_->lock_tls_blocks_);
121 15 for (vector<ThreadLocalStorage *>::iterator i =
122 15 instance_->tls_blocks_.begin(), iEnd = instance_->tls_blocks_.end();
123
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 15 i != iEnd; ++i)
124 {
125
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 15 if ((*i) == tls) {
126
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 15 instance_->tls_blocks_.erase(i);
127 15 break;
128 }
129 }
130 15 }
131
132
133 3419 void SessionCtx::Unset() {
134 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
135 3419 pthread_getspecific(thread_local_storage_));
136
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 3419 if (tls != NULL) {
137 3419 tls->is_set = false;
138 3419 tls->id = 0;
139 3419 tls->reponame = NULL;
140 3419 tls->client_instance = NULL;
141 }
142 3419 }
143
144
145 //------------------------------------------------------------------------------
146
147
148 18 CachePlugin::SessionInfo::SessionInfo(uint64_t id, const std::string &name)
149 18 : id(id)
150 18 , name(name)
151 {
152
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 18 vector<string> tokens = SplitString(name, ':');
153 18 reponame = strdup(tokens[0].c_str());
154
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 18 if (tokens.size() > 1)
155 16 client_instance = strdup(tokens[1].c_str());
156 else
157 2 client_instance = NULL;
158 18 }
159
160 const uint64_t CachePlugin::kSizeUnknown = uint64_t(-1);
161
162
163 1002 void CachePlugin::AskToDetach() {
164 1002 char detach = kSignalDetach;
165
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 1002 WritePipe(pipe_ctrl_[1], &detach, 1);
166 1002 }
167
168
169 17 CachePlugin::CachePlugin(uint64_t capabilities)
170 17 : is_local_(false)
171 17 , capabilities_(capabilities)
172 17 , fd_socket_(-1)
173 17 , fd_socket_lock_(-1)
174 17 , running_(0)
175 17 , num_workers_(0)
176 17 , max_object_size_(kDefaultMaxObjectSize)
177
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 17 , num_inlimbo_clients_(0)
178 {
179 17 atomic_init64(&next_session_id_);
180 17 atomic_init64(&next_txn_id_);
181 17 atomic_init64(&next_lst_id_);
182 // Don't use listing id zero
183 17 atomic_inc64(&next_lst_id_);
184
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 17 txn_ids_.Init(128, UniqueRequest(), HashUniqueRequest);
185 17 memset(&thread_io_, 0, sizeof(thread_io_));
186
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 17 MakePipe(pipe_ctrl_);
187 17 }
188
189
190 34 CachePlugin::~CachePlugin() {
191 34 Terminate();
192 34 ClosePipe(pipe_ctrl_);
193
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 34 if (fd_socket_ >= 0)
194 34 close(fd_socket_);
195
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 34 if (fd_socket_lock_ >= 0)
196 34 UnlockFile(fd_socket_lock_);
197 }
198
199
200 1 void CachePlugin::HandleBreadcrumbStore(
201 cvmfs::MsgBreadcrumbStoreReq *msg_req,
202 CacheTransport *transport)
203 {
204
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 1 SessionCtxGuard session_guard(msg_req->session_id(), this);
205
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 1 cvmfs::MsgBreadcrumbReply msg_reply;
206
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 1 CacheTransport::Frame frame_send(&msg_reply);
207
208 1 msg_reply.set_req_id(msg_req->req_id());
209
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 1 manifest::Breadcrumb breadcrumb;
210
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 1 bool retval = transport->ParseMsgHash(msg_req->breadcrumb().hash(),
211 &breadcrumb.catalog_hash);
212
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 1 if (!retval) {
213 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
214 "malformed hash received from client");
215 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
216 } else {
217 1 breadcrumb.timestamp = msg_req->breadcrumb().timestamp();
218
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 1 if (msg_req->breadcrumb().has_revision()) {
219 1 breadcrumb.revision = msg_req->breadcrumb().revision();
220 } else {
221 ✗ breadcrumb.revision = 0;
222 }
223 cvmfs::EnumStatus status =
224
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 1 StoreBreadcrumb(msg_req->breadcrumb().fqrn(), breadcrumb);
225
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 1 msg_reply.set_status(status);
226 }
227
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 1 transport->SendFrame(&frame_send);
228 1 }
229
230
231 2 void CachePlugin::HandleBreadcrumbLoad(
232 cvmfs::MsgBreadcrumbLoadReq *msg_req,
233 CacheTransport *transport)
234 {
235
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 2 SessionCtxGuard session_guard(msg_req->session_id(), this);
236
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 2 cvmfs::MsgBreadcrumbReply msg_reply;
237
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 2 CacheTransport::Frame frame_send(&msg_reply);
238
239 2 msg_reply.set_req_id(msg_req->req_id());
240
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 2 manifest::Breadcrumb breadcrumb;
241 cvmfs::EnumStatus status =
242
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 2 LoadBreadcrumb(msg_req->fqrn(), &breadcrumb);
243
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 2 msg_reply.set_status(status);
244
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 2 if (status == cvmfs::STATUS_OK) {
245
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 1 assert(breadcrumb.IsValid());
246
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 1 cvmfs::MsgHash *msg_hash = new cvmfs::MsgHash();
247
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 1 transport->FillMsgHash(breadcrumb.catalog_hash, msg_hash);
248
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 1 cvmfs::MsgBreadcrumb *msg_breadcrumb = new cvmfs::MsgBreadcrumb();
249
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 1 msg_breadcrumb->set_fqrn(msg_req->fqrn());
250 1 msg_breadcrumb->set_allocated_hash(msg_hash);
251 1 msg_breadcrumb->set_timestamp(breadcrumb.timestamp);
252 1 msg_breadcrumb->set_revision(breadcrumb.revision);
253 1 msg_reply.set_allocated_breadcrumb(msg_breadcrumb);
254 }
255
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 2 transport->SendFrame(&frame_send);
256 2 }
257
258
259 18 void CachePlugin::HandleHandshake(
260 cvmfs::MsgHandshake *msg_req,
261 CacheTransport *transport)
262 {
263 18 uint64_t session_id = NextSessionId();
264
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 18 if (msg_req->has_name()) {
265
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 18 sessions_[session_id] = SessionInfo(session_id, msg_req->name());
266 } else {
267 ✗ sessions_[session_id] = SessionInfo(session_id,
268 ✗ "anonymous client (" + StringifyInt(session_id) + ")");
269 }
270
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 18 cvmfs::MsgHandshakeAck msg_ack;
271
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 18 CacheTransport::Frame frame_send(&msg_ack);
272
273
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 18 msg_ack.set_status(cvmfs::STATUS_OK);
274
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 18 msg_ack.set_name(name_);
275 18 msg_ack.set_protocol_version(kPbProtocolVersion);
276 18 msg_ack.set_max_object_size(max_object_size_);
277 18 msg_ack.set_session_id(session_id);
278 18 msg_ack.set_capabilities(capabilities_);
279
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 18 if (is_local_)
280 18 msg_ack.set_pid(getpid());
281
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 18 transport->SendFrame(&frame_send);
282 18 }
283
284
285 4 void CachePlugin::HandleInfo(
286 cvmfs::MsgInfoReq *msg_req,
287 CacheTransport *transport)
288 {
289
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 4 SessionCtxGuard session_guard(msg_req->session_id(), this);
290
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 4 cvmfs::MsgInfoReply msg_reply;
291
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 4 CacheTransport::Frame frame_send(&msg_reply);
292
293 4 msg_reply.set_req_id(msg_req->req_id());
294 4 Info info;
295
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 4 cvmfs::EnumStatus status = GetInfo(&info);
296
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 4 if (status != cvmfs::STATUS_OK) {
297 ✗ LogSessionError(msg_req->session_id(), status,
298 "failed to query cache status");
299 }
300 4 msg_reply.set_size_bytes(info.size_bytes);
301 4 msg_reply.set_used_bytes(info.used_bytes);
302 4 msg_reply.set_pinned_bytes(info.pinned_bytes);
303 4 msg_reply.set_no_shrink(info.no_shrink);
304
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 4 msg_reply.set_status(status);
305
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 4 transport->SendFrame(&frame_send);
306 4 }
307
308
309 4 void CachePlugin::HandleIoctl(cvmfs::MsgIoctl *msg_req) {
310
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 4 if (!msg_req->has_conncnt_change_by())
311 ✗ return;
312 4 int32_t conncnt_change_by = msg_req->conncnt_change_by();
313
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 4 if ((static_cast<int32_t>(num_inlimbo_clients_) + conncnt_change_by) < 0) {
314 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
315 "invalid request to drop connection counter below zero");
316 ✗ return;
317 }
318
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 4 if (conncnt_change_by > 0) {
319
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 2 LogSessionInfo(msg_req->session_id(), "lock session beyond lifetime");
320 } else {
321
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 2 LogSessionInfo(msg_req->session_id(), "release session lock");
322 }
323 4 num_inlimbo_clients_ += conncnt_change_by;
324 }
325
326
327 10 void CachePlugin::HandleList(
328 cvmfs::MsgListReq *msg_req,
329 CacheTransport *transport)
330 {
331
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 10 SessionCtxGuard session_guard(msg_req->session_id(), this);
332
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 10 cvmfs::MsgListReply msg_reply;
333
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 10 CacheTransport::Frame frame_send(&msg_reply);
334
335 10 msg_reply.set_req_id(msg_req->req_id());
336 10 int64_t listing_id = msg_req->listing_id();
337 10 msg_reply.set_listing_id(listing_id);
338 10 msg_reply.set_is_last_part(true);
339
340 cvmfs::EnumStatus status;
341
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 10 if (msg_req->listing_id() == 0) {
342 6 listing_id = NextLstId();
343
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 6 status = ListingBegin(listing_id, msg_req->object_type());
344
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 6 if (status != cvmfs::STATUS_OK) {
345 ✗ LogSessionError(msg_req->session_id(), status,
346 "failed to start enumeration of objects");
347 ✗ msg_reply.set_status(status);
348 ✗ transport->SendFrame(&frame_send);
349 ✗ return;
350 }
351 6 msg_reply.set_listing_id(listing_id);
352 }
353
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 10 assert(listing_id != 0);
354
355
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 10 ObjectInfo item;
356 10 unsigned total_size = 0;
357
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 200006 while ((status = ListingNext(listing_id, &item)) == cvmfs::STATUS_OK) {
358
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 200000 cvmfs::MsgListRecord *msg_list_record = msg_reply.add_list_record();
359
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 200000 cvmfs::MsgHash *msg_hash = new cvmfs::MsgHash();
360
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 200000 transport->FillMsgHash(item.id, msg_hash);
361 200000 msg_list_record->set_allocated_hash(msg_hash);
362 200000 msg_list_record->set_pinned(item.pinned);
363
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 200000 msg_list_record->set_description(item.description);
364 // Approximation of the message size
365 200000 total_size += sizeof(item) + item.description.length();
366
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 200000 if (total_size > kListingSize)
367 4 break;
368 }
369
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 10 if (status == cvmfs::STATUS_OUTOFBOUNDS) {
370
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 6 ListingEnd(listing_id);
371 6 status = cvmfs::STATUS_OK;
372 } else {
373 4 msg_reply.set_is_last_part(false);
374 }
375
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 10 if (status != cvmfs::STATUS_OK) {
376 ✗ LogSessionError(msg_req->session_id(), status, "failed enumerate objects");
377 }
378
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 10 msg_reply.set_status(status);
379
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 10 transport->SendFrame(&frame_send);
380
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 10 }
381
382
383 16 void CachePlugin::HandleObjectInfo(
384 cvmfs::MsgObjectInfoReq *msg_req,
385 CacheTransport *transport)
386 {
387
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 16 SessionCtxGuard session_guard(msg_req->session_id(), this);
388
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 16 cvmfs::MsgObjectInfoReply msg_reply;
389
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 16 CacheTransport::Frame frame_send(&msg_reply);
390
391 16 msg_reply.set_req_id(msg_req->req_id());
392
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 16 shash::Any object_id;
393
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 16 bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
394
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 16 if (!retval) {
395 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
396 "malformed hash received from client");
397 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
398 } else {
399
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 16 ObjectInfo info;
400
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 16 cvmfs::EnumStatus status = GetObjectInfo(object_id, &info);
401
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 16 msg_reply.set_status(status);
402
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 16 if (status == cvmfs::STATUS_OK) {
403
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 15 msg_reply.set_object_type(info.object_type);
404 15 msg_reply.set_size(info.size);
405
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 1 } else if (status != cvmfs::STATUS_NOENTRY) {
406
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 1 LogSessionError(msg_req->session_id(), status,
407 "failed retrieving object details");
408 }
409 16 }
410
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 16 transport->SendFrame(&frame_send);
411 16 }
412
413
414 2211 void CachePlugin::HandleRead(
415 cvmfs::MsgReadReq *msg_req,
416 CacheTransport *transport)
417 {
418
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 2211 SessionCtxGuard session_guard(msg_req->session_id(), this);
419
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 2211 cvmfs::MsgReadReply msg_reply;
420
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 2211 CacheTransport::Frame frame_send(&msg_reply);
421
422 2211 msg_reply.set_req_id(msg_req->req_id());
423
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 2211 shash::Any object_id;
424
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 2211 bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
425
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 2211 if (!retval || (msg_req->size() > max_object_size_)) {
426 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
427 "malformed hash received from client");
428 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
429 ✗ transport->SendFrame(&frame_send);
430 ✗ return;
431 }
432 2211 unsigned size = msg_req->size();
433 #ifdef __APPLE__
434 unsigned char *buffer = reinterpret_cast<unsigned char *>(smalloc(size));
435 #else
436 2211 unsigned char buffer[size];
437 #endif
438
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 2211 cvmfs::EnumStatus status = Pread(object_id, msg_req->offset(), &size, buffer);
439
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 2211 msg_reply.set_status(status);
440
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 2211 if (status == cvmfs::STATUS_OK) {
441 2210 frame_send.set_attachment(buffer, size);
442 } else {
443
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 1 LogSessionError(msg_req->session_id(), status,
444 "failed to read from object");
445 }
446
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 2211 transport->SendFrame(&frame_send);
447 #ifdef __APPLE__
448 free(buffer);
449 #endif
450
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 4422 }
451
452
453 564 void CachePlugin::HandleRefcount(
454 cvmfs::MsgRefcountReq *msg_req,
455 CacheTransport *transport)
456 {
457
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 564 SessionCtxGuard session_guard(msg_req->session_id(), this);
458
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 564 cvmfs::MsgRefcountReply msg_reply;
459
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 564 CacheTransport::Frame frame_send(&msg_reply);
460
461 564 msg_reply.set_req_id(msg_req->req_id());
462
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 564 shash::Any object_id;
463
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 564 bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
464
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 564 if (!retval) {
465 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
466 "malformed hash received from client");
467 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
468 } else {
469
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 564 cvmfs::EnumStatus status = ChangeRefcount(object_id, msg_req->change_by());
470
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 564 msg_reply.set_status(status);
471
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 564 if ((status != cvmfs::STATUS_OK) && (status != cvmfs::STATUS_NOENTRY)) {
472
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 1 LogSessionError(msg_req->session_id(), status,
473
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 2 "failed to open/close object " + object_id.ToString());
474 }
475 }
476
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 564 transport->SendFrame(&frame_send);
477 564 }
478
479
480 3459 bool CachePlugin::HandleRequest(int fd_con) {
481 3459 CacheTransport transport(fd_con, CacheTransport::kFlagSendIgnoreFailure);
482 3459 char buffer[max_object_size_];
483
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 3459 CacheTransport::Frame frame_recv;
484 3459 frame_recv.set_attachment(buffer, max_object_size_);
485
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 3459 bool retval = transport.RecvFrame(&frame_recv);
486
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 3459 if (!retval) {
487 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
488 ✗ "failed to receive request from connection (%d)", errno);
489 ✗ return false;
490 }
491
492
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 3459 google::protobuf::MessageLite *msg_typed = frame_recv.GetMsgTyped();
493
494
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 3459 if (msg_typed->GetTypeName() == "cvmfs.MsgHandshake") {
495 18 cvmfs::MsgHandshake *msg_req =
496 reinterpret_cast<cvmfs::MsgHandshake *>(msg_typed);
497
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 18 HandleHandshake(msg_req, &transport);
498
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 3441 } else if (msg_typed->GetTypeName() == "cvmfs.MsgQuit") {
499 18 cvmfs::MsgQuit *msg_req = reinterpret_cast<cvmfs::MsgQuit *>(msg_typed);
500 map<uint64_t, SessionInfo>::const_iterator iter =
501
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 18 sessions_.find(msg_req->session_id());
502
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 18 if (iter != sessions_.end()) {
503 18 free(iter->second.reponame);
504 18 free(iter->second.client_instance);
505 }
506
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 18 sessions_.erase(msg_req->session_id());
507 18 return false;
508
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 3423 } else if (msg_typed->GetTypeName() == "cvmfs.MsgIoctl") {
509
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 4 HandleIoctl(reinterpret_cast<cvmfs::MsgIoctl *>(msg_typed));
510
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 3419 } else if (msg_typed->GetTypeName() == "cvmfs.MsgRefcountReq") {
511 564 cvmfs::MsgRefcountReq *msg_req =
512 reinterpret_cast<cvmfs::MsgRefcountReq *>(msg_typed);
513
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 564 HandleRefcount(msg_req, &transport);
514
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 2855 } else if (msg_typed->GetTypeName() == "cvmfs.MsgObjectInfoReq") {
515 16 cvmfs::MsgObjectInfoReq *msg_req =
516 reinterpret_cast<cvmfs::MsgObjectInfoReq *>(msg_typed);
517
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 16 HandleObjectInfo(msg_req, &transport);
518
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 2839 } else if (msg_typed->GetTypeName() == "cvmfs.MsgReadReq") {
519 2211 cvmfs::MsgReadReq *msg_req =
520 reinterpret_cast<cvmfs::MsgReadReq *>(msg_typed);
521
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 2211 HandleRead(msg_req, &transport);
522
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 628 } else if (msg_typed->GetTypeName() == "cvmfs.MsgStoreReq") {
523 608 cvmfs::MsgStoreReq *msg_req =
524 reinterpret_cast<cvmfs::MsgStoreReq *>(msg_typed);
525
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 608 HandleStore(msg_req, &frame_recv, &transport);
526
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 20 } else if (msg_typed->GetTypeName() == "cvmfs.MsgStoreAbortReq") {
527 1 cvmfs::MsgStoreAbortReq *msg_req =
528 reinterpret_cast<cvmfs::MsgStoreAbortReq *>(msg_typed);
529
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 1 HandleStoreAbort(msg_req, &transport);
530
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 19 } else if (msg_typed->GetTypeName() == "cvmfs.MsgInfoReq") {
531 4 cvmfs::MsgInfoReq *msg_req =
532 reinterpret_cast<cvmfs::MsgInfoReq *>(msg_typed);
533
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 4 HandleInfo(msg_req, &transport);
534
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 15 } else if (msg_typed->GetTypeName() == "cvmfs.MsgShrinkReq") {
535 2 cvmfs::MsgShrinkReq *msg_req =
536 reinterpret_cast<cvmfs::MsgShrinkReq *>(msg_typed);
537
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 2 HandleShrink(msg_req, &transport);
538
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 13 } else if (msg_typed->GetTypeName() == "cvmfs.MsgListReq") {
539 10 cvmfs::MsgListReq *msg_req =
540 reinterpret_cast<cvmfs::MsgListReq *>(msg_typed);
541
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 10 HandleList(msg_req, &transport);
542
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 3 } else if (msg_typed->GetTypeName() == "cvmfs.MsgBreadcrumbStoreReq") {
543 1 cvmfs::MsgBreadcrumbStoreReq *msg_req =
544 reinterpret_cast<cvmfs::MsgBreadcrumbStoreReq *>(msg_typed);
545
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 1 HandleBreadcrumbStore(msg_req, &transport);
546
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 2 } else if (msg_typed->GetTypeName() == "cvmfs.MsgBreadcrumbLoadReq") {
547 2 cvmfs::MsgBreadcrumbLoadReq *msg_req =
548 reinterpret_cast<cvmfs::MsgBreadcrumbLoadReq *>(msg_typed);
549
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 2 HandleBreadcrumbLoad(msg_req, &transport);
550 } else {
551 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
552 "unexpected message from client: %s",
553 ✗ msg_typed->GetTypeName().c_str());
554 ✗ return false;
555 }
556
557 3441 return true;
558
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 6918 }
559
560
561 2 void CachePlugin::HandleShrink(
562 cvmfs::MsgShrinkReq *msg_req,
563 CacheTransport *transport)
564 {
565
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 2 SessionCtxGuard session_guard(msg_req->session_id(), this);
566
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 2 cvmfs::MsgShrinkReply msg_reply;
567
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 2 CacheTransport::Frame frame_send(&msg_reply);
568
569 2 msg_reply.set_req_id(msg_req->req_id());
570 2 uint64_t used_bytes = 0;
571
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 2 cvmfs::EnumStatus status = Shrink(msg_req->shrink_to(), &used_bytes);
572 2 msg_reply.set_used_bytes(used_bytes);
573
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 2 msg_reply.set_status(status);
574
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 2 if ((status != cvmfs::STATUS_OK) && (status != cvmfs::STATUS_PARTIAL)) {
575 ✗ LogSessionError(msg_req->session_id(), status, "failed to cleanup cache");
576 }
577
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 2 transport->SendFrame(&frame_send);
578 2 }
579
580
581 1 void CachePlugin::HandleStoreAbort(
582 cvmfs::MsgStoreAbortReq *msg_req,
583 CacheTransport *transport)
584 {
585
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 1 SessionCtxGuard session_guard(msg_req->session_id(), this);
586
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 1 cvmfs::MsgStoreReply msg_reply;
587
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 1 CacheTransport::Frame frame_send(&msg_reply);
588 1 msg_reply.set_req_id(msg_req->req_id());
589 1 msg_reply.set_part_nr(0);
590 uint64_t txn_id;
591 1 UniqueRequest uniq_req(msg_req->session_id(), msg_req->req_id());
592
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 1 bool retval = txn_ids_.Lookup(uniq_req, &txn_id);
593
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 1 if (!retval) {
594 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
595 "malformed transaction id received from client");
596 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
597 } else {
598
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 1 cvmfs::EnumStatus status = AbortTxn(txn_id);
599
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 1 msg_reply.set_status(status);
600
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 1 if (status != cvmfs::STATUS_OK) {
601 ✗ LogSessionError(msg_req->session_id(), status,
602 "failed to abort transaction");
603 }
604
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 1 txn_ids_.Erase(uniq_req);
605 }
606
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 1 transport->SendFrame(&frame_send);
607 1 }
608
609
610 608 void CachePlugin::HandleStore(
611 cvmfs::MsgStoreReq *msg_req,
612 CacheTransport::Frame *frame,
613 CacheTransport *transport)
614 {
615
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 608 SessionCtxGuard session_guard(msg_req->session_id(), this);
616
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 608 cvmfs::MsgStoreReply msg_reply;
617
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 608 CacheTransport::Frame frame_send(&msg_reply);
618 608 msg_reply.set_req_id(msg_req->req_id());
619 608 msg_reply.set_part_nr(msg_req->part_nr());
620
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 608 shash::Any object_id;
621
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 608 bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
622 1824 if ( !retval ||
623
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 1216 (frame->att_size() > max_object_size_) ||
624
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 608 ((frame->att_size() < max_object_size_) && !msg_req->last_part()) )
625 {
626 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
627 "malformed hash or bad object size received from client");
628 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
629 ✗ transport->SendFrame(&frame_send);
630 ✗ return;
631 }
632
633 608 UniqueRequest uniq_req(msg_req->session_id(), msg_req->req_id());
634 uint64_t txn_id;
635 608 cvmfs::EnumStatus status = cvmfs::STATUS_OK;
636
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 608 if (msg_req->part_nr() == 1) {
637
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 7 if (txn_ids_.Contains(uniq_req)) {
638 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
639 "invalid attempt to restart running transaction");
640 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
641 ✗ transport->SendFrame(&frame_send);
642 ✗ return;
643 }
644 7 txn_id = NextTxnId();
645
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 7 ObjectInfo info;
646 7 info.id = object_id;
647
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 7 if (msg_req->has_expected_size()) {info.size = msg_req->expected_size();}
648
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 7 if (msg_req->has_object_type()) {info.object_type = msg_req->object_type();}
649
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 7 if (msg_req->has_description()) {info.description = msg_req->description();}
650
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 7 status = StartTxn(object_id, txn_id, info);
651
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 7 if (status != cvmfs::STATUS_OK) {
652 ✗ LogSessionError(msg_req->session_id(), status,
653 "failed to start transaction");
654 ✗ msg_reply.set_status(status);
655 ✗ transport->SendFrame(&frame_send);
656 ✗ return;
657 }
658
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 7 txn_ids_.Insert(uniq_req, txn_id);
659
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 7 } else {
660
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 601 retval = txn_ids_.Lookup(uniq_req, &txn_id);
661
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 601 if (!retval) {
662 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
663 "invalid transaction received from client");
664 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
665 ✗ transport->SendFrame(&frame_send);
666 ✗ return;
667 }
668 }
669
670 // TODO(jblomer): check part number and send objects up in order
671
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 608 if (frame->att_size() > 0) {
672
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 1214 status = WriteTxn(txn_id,
673 607 reinterpret_cast<unsigned char *>(frame->attachment()),
674 frame->att_size());
675
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 607 if (status != cvmfs::STATUS_OK) {
676 ✗ LogSessionError(msg_req->session_id(), status, "failure writing object");
677 ✗ msg_reply.set_status(status);
678 ✗ transport->SendFrame(&frame_send);
679 ✗ return;
680 }
681 }
682
683
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 608 if (msg_req->last_part()) {
684
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 6 status = CommitTxn(txn_id);
685
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 6 if (status != cvmfs::STATUS_OK) {
686 ✗ LogSessionError(msg_req->session_id(), status,
687 "failure committing object");
688 }
689
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 6 txn_ids_.Erase(uniq_req);
690 }
691
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 608 msg_reply.set_status(status);
692
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 608 transport->SendFrame(&frame_send);
693
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 608 }
694
695
696 17 bool CachePlugin::IsRunning() {
697 17 return atomic_read32(&running_) != 0;
698 }
699
700
701 17 bool CachePlugin::Listen(const string &locator) {
702
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 17 vector<string> tokens = SplitString(locator, '=');
703
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 17 if (tokens[0] == "unix") {
704
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 17 string lock_path = tokens[1] + ".lock";
705
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 17 fd_socket_lock_ = TryLockFile(lock_path);
706
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 17 if (fd_socket_lock_ == -1) {
707 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
708 ✗ "failed to acquire lock file %s (%d)", lock_path.c_str(), errno);
709 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
710 ✗ return false;
711
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 17 } else if (fd_socket_lock_ == -2) {
712 // Another plugin process probably started in the meantime
713 ✗ NotifySupervisor(CacheTransport::kReadyNotification);
714 ✗ if (getenv(CacheTransport::kEnvReadyNotifyFd) == NULL) {
715 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogStderr,
716 "failed to lock on %s, file is busy", lock_path.c_str());
717 }
718 ✗ return false;
719 }
720
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 17 assert(fd_socket_lock_ >= 0);
721
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 17 fd_socket_ = MakeSocket(tokens[1], 0600);
722 17 is_local_ = true;
723
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 17 } else if (tokens[0] == "tcp") {
724 ✗ vector<string> tcp_address = SplitString(tokens[1], ':');
725 ✗ if (tcp_address.size() != 2) {
726 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
727 "invalid locator: %s", locator.c_str());
728 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
729 ✗ return false;
730 }
731 ✗ fd_socket_ = MakeTcpEndpoint(tcp_address[0], String2Uint64(tcp_address[1]));
732 ✗ } else {
733 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
734 "unknown endpoint in locator: %s", locator.c_str());
735 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
736 ✗ return false;
737 }
738
739
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 17 if (fd_socket_ < 0) {
740 ✗ if (errno == EADDRINUSE) {
741 // Another plugin process probably started in the meantime
742 ✗ NotifySupervisor(CacheTransport::kReadyNotification);
743 } else {
744 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
745 ✗ "failed to create endpoint %s (%d)", locator.c_str(), errno);
746 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
747 }
748 ✗ is_local_ = false;
749 ✗ return false;
750 }
751 17 int retval = listen(fd_socket_, 32);
752
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 17 assert(retval == 0);
753
754 17 return true;
755 17 }
756
757
758 4 void CachePlugin::LogSessionInfo(uint64_t session_id, const string &msg) {
759
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 8 string session_str("unidentified client (" + StringifyInt(session_id) + ")");
760
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 4 map<uint64_t, SessionInfo>::const_iterator iter = sessions_.find(session_id);
761
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 4 if (iter != sessions_.end()) {
762
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 4 session_str = iter->second.name;
763 }
764
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 4 LogCvmfs(kLogCache, kLogDebug | kLogSyslog,
765 "session '%s': %s", session_str.c_str(), msg.c_str());
766 4 }
767
768
769 3 void CachePlugin::LogSessionError(
770 uint64_t session_id,
771 cvmfs::EnumStatus status,
772 const std::string &msg)
773 {
774
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 6 string session_str("unidentified client (" + StringifyInt(session_id) + ")");
775
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 3 map<uint64_t, SessionInfo>::const_iterator iter = sessions_.find(session_id);
776
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 3 if (iter != sessions_.end()) {
777
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 3 session_str = iter->second.name;
778 }
779
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 3 LogCvmfs(kLogCache, kLogDebug | kLogSyslogErr,
780 "session '%s': %s (%d - %s)",
781 session_str.c_str(), msg.c_str(), status,
782 CacheTransportCode2Ascii(status));
783 3 }
784
785
786 17 void *CachePlugin::MainProcessRequests(void *data) {
787 17 CachePlugin *cache_plugin = reinterpret_cast<CachePlugin *>(data);
788
789 17 platform_sighandler_t save_sigpipe = signal(SIGPIPE, SIG_IGN);
790
791 17 vector<struct pollfd> watch_fds;
792 // Elements 0, 1: control pipe, socket fd
793 struct pollfd watch_ctrl;
794 17 watch_ctrl.fd = cache_plugin->pipe_ctrl_[0];
795 17 watch_ctrl.events = POLLIN | POLLPRI;
796
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 17 watch_fds.push_back(watch_ctrl);
797 struct pollfd watch_socket;
798 17 watch_socket.fd = cache_plugin->fd_socket_;
799 17 watch_socket.events = POLLIN | POLLPRI;
800
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 17 watch_fds.push_back(watch_socket);
801
802 17 bool terminated = false;
803
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 4478 while (!terminated) {
804
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 17877 for (unsigned i = 0; i < watch_fds.size(); ++i)
805 13399 watch_fds[i].revents = 0;
806
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 4478 int retval = poll(&watch_fds[0], watch_fds.size(), -1);
807
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 4478 if (retval < 0) {
808 ✗ if (errno == EINTR)
809 ✗ continue;
810 ✗ PANIC(kLogSyslogErr | kLogDebug, "cache plugin connection failure (%d)",
811 errno);
812 }
813
814 // Termination or detach
815
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 4478 if (watch_fds[0].revents) {
816 char signal;
817
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 1019 ReadPipe(watch_fds[0].fd, &signal, 1);
818
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 1019 if (signal == kSignalDetach) {
819
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 1002 cache_plugin->SendDetachRequests();
820 1002 continue;
821 }
822
823 // termination
824
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 17 if (watch_fds.size() > 2) {
825 ✗ LogCvmfs(kLogCache, kLogSyslogWarn | kLogDebug,
826 "terminating external cache manager with pending connections");
827 }
828 17 break;
829 }
830
831 // New connection
832
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 3459 if (watch_fds[1].revents) {
833 struct sockaddr_un remote;
834 18 socklen_t socket_size = sizeof(remote);
835 int fd_con =
836
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 18 accept(watch_fds[1].fd, (struct sockaddr *)&remote, &socket_size);
837
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 18 if (fd_con < 0) {
838 ✗ LogCvmfs(kLogCache, kLogSyslogWarn | kLogDebug,
839 ✗ "failed to establish connection (%d)", errno);
840 ✗ continue;
841 }
842 struct pollfd watch_con;
843 18 watch_con.fd = fd_con;
844 18 watch_con.events = POLLIN | POLLPRI;
845
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 18 watch_fds.push_back(watch_con);
846
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 18 cache_plugin->connections_.insert(fd_con);
847 }
848
849 // New request
850
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 6918 for (unsigned i = 2; i < watch_fds.size(); ) {
851
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 3459 if (watch_fds[i].revents) {
852
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 3459 bool proceed = cache_plugin->HandleRequest(watch_fds[i].fd);
853
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 3459 if (!proceed) {
854
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 18 close(watch_fds[i].fd);
855
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 18 cache_plugin->connections_.erase(watch_fds[i].fd);
856
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 18 watch_fds.erase(watch_fds.begin() + i);
857
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 18 if ( (getenv(CacheTransport::kEnvReadyNotifyFd) != NULL) &&
858
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 18 (cache_plugin->connections_.empty()) &&
859 ✗ (cache_plugin->num_inlimbo_clients_ == 0) )
860 {
861 ✗ LogCvmfs(kLogCache, kLogSyslog,
862 "stopping cache plugin, no more active clients");
863 ✗ terminated = true;
864 ✗ break;
865 }
866 } else {
867 3441 i++;
868 }
869 } else {
870 ✗ i++;
871 }
872 }
873 }
874
875 // 0, 1 being closed by destructor
876
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 17 for (unsigned i = 2; i < watch_fds.size(); ++i)
877 ✗ close(watch_fds[i].fd);
878
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 17 cache_plugin->txn_ids_.Clear();
879
880 17 signal(SIGPIPE, save_sigpipe);
881 17 return NULL;
882 17 }
883
884
885 /**
886 * Used during startup to synchronize with the cvmfs client.
887 */
888 17 void CachePlugin::NotifySupervisor(char signal) {
889 17 char *pipe_ready = getenv(CacheTransport::kEnvReadyNotifyFd);
890
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 17 if (pipe_ready == NULL)
891 17 return;
892 ✗ int fd_pipe_ready = String2Int64(pipe_ready);
893 ✗ WritePipe(fd_pipe_ready, &signal, 1);
894 }
895
896
897 17 void CachePlugin::ProcessRequests(unsigned num_workers) {
898 17 num_workers_ = num_workers;
899 17 int retval = pthread_create(&thread_io_, NULL, MainProcessRequests, this);
900
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 17 assert(retval == 0);
901 17 NotifySupervisor(CacheTransport::kReadyNotification);
902 17 atomic_cas32(&running_, 0, 1);
903 17 }
904
905
906 1002 void CachePlugin::SendDetachRequests() {
907 1002 set<int>::const_iterator iter = connections_.begin();
908 1002 set<int>::const_iterator iter_end = connections_.end();
909
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 2004 for (; iter != iter_end; ++iter) {
910 1002 CacheTransport transport(*iter,
911 CacheTransport::kFlagSendIgnoreFailure |
912
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 1002 CacheTransport::kFlagSendNonBlocking);
913
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 1002 cvmfs::MsgDetach msg_detach;
914
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 1002 CacheTransport::Frame frame_send(&msg_detach);
915
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 1002 transport.SendFrame(&frame_send);
916 1002 }
917 1002 }
918
919
920 17 void CachePlugin::Terminate() {
921
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 17 if (IsRunning()) {
922 17 char terminate = kSignalTerminate;
923
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 17 WritePipe(pipe_ctrl_[1], &terminate, 1);
924
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 17 pthread_join(thread_io_, NULL);
925 17 atomic_cas32(&running_, 1, 0);
926 }
927 17 }
928
929
930 ✗ void CachePlugin::WaitFor() {
931 ✗ if (!IsRunning())
932 ✗ return;
933 ✗ pthread_join(thread_io_, NULL);
934 }
935