GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/cache_plugin/channel.cc
Date: 2025-07-13 02:35:07
Exec Total Coverage
Lines: 483 596 81.0%
Branches: 342 805 42.5%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
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 7 SessionCtx::SessionCtx() {
39 7 lock_tls_blocks_ = reinterpret_cast<pthread_mutex_t *>(
40 7 smalloc(sizeof(pthread_mutex_t)));
41 7 const int retval = pthread_mutex_init(lock_tls_blocks_, NULL);
42
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 7 assert(retval == 0);
43 7 }
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 ✗ const int retval = pthread_key_delete(thread_local_storage_);
55 ✗ assert(retval == 0);
56 }
57
58
59 67298 SessionCtx *SessionCtx::GetInstance() {
60
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 67298 if (instance_ == NULL) {
61 7 instance_ = new SessionCtx();
62 7 const int retval = pthread_key_create(&instance_->thread_local_storage_,
63 TlsDestructor);
64
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 7 assert(retval == 0);
65 }
66
67 67298 return instance_;
68 }
69
70
71 19432 void SessionCtx::Get(uint64_t *id, char **reponame, char **client_instance) {
72 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
73 19432 pthread_getspecific(thread_local_storage_));
74
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 19432 if ((tls == NULL) || !tls->is_set) {
75 7 *id = 0;
76 7 *reponame = NULL;
77 7 *client_instance = NULL;
78 } else {
79 19425 *id = tls->id;
80 19425 *reponame = tls->reponame;
81 19425 *client_instance = tls->client_instance;
82 }
83 19432 }
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 23933 void SessionCtx::Set(uint64_t id, char *reponame, char *client_instance) {
97 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
98 23933 pthread_getspecific(thread_local_storage_));
99
100
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 23933 if (tls == NULL) {
101
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 105 tls = new ThreadLocalStorage(id, reponame, client_instance);
102 105 const int retval = pthread_setspecific(thread_local_storage_, tls);
103
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 105 assert(retval == 0);
104 105 const MutexLockGuard lock_guard(lock_tls_blocks_);
105
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 105 tls_blocks_.push_back(tls);
106 105 } else {
107 23828 tls->id = id;
108 23828 tls->reponame = reponame;
109 23828 tls->client_instance = client_instance;
110 23828 tls->is_set = true;
111 }
112 23933 }
113
114
115 105 void SessionCtx::TlsDestructor(void *data) {
116 105 ThreadLocalStorage *tls = static_cast<SessionCtx::ThreadLocalStorage *>(data);
117
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 105 delete tls;
118
119
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 105 assert(instance_);
120 105 const MutexLockGuard lock_guard(instance_->lock_tls_blocks_);
121 105 for (vector<ThreadLocalStorage *>::iterator
122 105 i = instance_->tls_blocks_.begin(),
123 105 iEnd = instance_->tls_blocks_.end();
124
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 105 i != iEnd;
125 ✗ ++i) {
126
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 105 if ((*i) == tls) {
127
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 105 instance_->tls_blocks_.erase(i);
128 105 break;
129 }
130 }
131 105 }
132
133
134 23933 void SessionCtx::Unset() {
135 ThreadLocalStorage *tls = static_cast<ThreadLocalStorage *>(
136 23933 pthread_getspecific(thread_local_storage_));
137
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 23933 if (tls != NULL) {
138 23933 tls->is_set = false;
139 23933 tls->id = 0;
140 23933 tls->reponame = NULL;
141 23933 tls->client_instance = NULL;
142 }
143 23933 }
144
145
146 //------------------------------------------------------------------------------
147
148
149 126 CachePlugin::SessionInfo::SessionInfo(uint64_t id, const std::string &name)
150 126 : id(id), name(name) {
151
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 126 vector<string> tokens = SplitString(name, ':');
152 126 reponame = strdup(tokens[0].c_str());
153
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 126 if (tokens.size() > 1)
154 112 client_instance = strdup(tokens[1].c_str());
155 else
156 14 client_instance = NULL;
157 126 }
158
159 const uint64_t CachePlugin::kSizeUnknown = uint64_t(-1);
160
161
162 7014 void CachePlugin::AskToDetach() {
163 7014 char detach = kSignalDetach;
164
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 7014 WritePipe(pipe_ctrl_[1], &detach, 1);
165 7014 }
166
167
168 119 CachePlugin::CachePlugin(uint64_t capabilities)
169 119 : is_local_(false)
170 119 , capabilities_(capabilities)
171 119 , fd_socket_(-1)
172 119 , fd_socket_lock_(-1)
173 119 , running_(0)
174 119 , num_workers_(0)
175 119 , max_object_size_(kDefaultMaxObjectSize)
176
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 119 , num_inlimbo_clients_(0) {
177 119 atomic_init64(&next_session_id_);
178 119 atomic_init64(&next_txn_id_);
179 119 atomic_init64(&next_lst_id_);
180 // Don't use listing id zero
181 119 atomic_inc64(&next_lst_id_);
182
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 119 txn_ids_.Init(128, UniqueRequest(), HashUniqueRequest);
183 119 memset(&thread_io_, 0, sizeof(thread_io_));
184
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 119 MakePipe(pipe_ctrl_);
185 119 }
186
187
188 238 CachePlugin::~CachePlugin() {
189 238 Terminate();
190 238 ClosePipe(pipe_ctrl_);
191
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 238 if (fd_socket_ >= 0)
192 238 close(fd_socket_);
193
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 238 if (fd_socket_lock_ >= 0)
194 238 UnlockFile(fd_socket_lock_);
195 }
196
197
198 7 void CachePlugin::HandleBreadcrumbStore(cvmfs::MsgBreadcrumbStoreReq *msg_req,
199 CacheTransport *transport) {
200
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 7 const SessionCtxGuard session_guard(msg_req->session_id(), this);
201
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 7 cvmfs::MsgBreadcrumbReply msg_reply;
202
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 7 CacheTransport::Frame frame_send(&msg_reply);
203
204 7 msg_reply.set_req_id(msg_req->req_id());
205
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 7 manifest::Breadcrumb breadcrumb;
206
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 7 const bool retval = transport->ParseMsgHash(msg_req->breadcrumb().hash(),
207 &breadcrumb.catalog_hash);
208
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 7 if (!retval) {
209 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
210 "malformed hash received from client");
211 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
212 } else {
213 7 breadcrumb.timestamp = msg_req->breadcrumb().timestamp();
214
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 7 if (msg_req->breadcrumb().has_revision()) {
215 7 breadcrumb.revision = msg_req->breadcrumb().revision();
216 } else {
217 ✗ breadcrumb.revision = 0;
218 }
219
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 7 const cvmfs::EnumStatus status = StoreBreadcrumb(
220 7 msg_req->breadcrumb().fqrn(), breadcrumb);
221
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 7 msg_reply.set_status(status);
222 }
223
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 7 transport->SendFrame(&frame_send);
224 7 }
225
226
227 14 void CachePlugin::HandleBreadcrumbLoad(cvmfs::MsgBreadcrumbLoadReq *msg_req,
228 CacheTransport *transport) {
229
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 14 const SessionCtxGuard session_guard(msg_req->session_id(), this);
230
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 14 cvmfs::MsgBreadcrumbReply msg_reply;
231
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 14 CacheTransport::Frame frame_send(&msg_reply);
232
233 14 msg_reply.set_req_id(msg_req->req_id());
234
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 14 manifest::Breadcrumb breadcrumb;
235
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 14 const cvmfs::EnumStatus status = LoadBreadcrumb(msg_req->fqrn(), &breadcrumb);
236
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 14 msg_reply.set_status(status);
237
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 14 if (status == cvmfs::STATUS_OK) {
238
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 7 assert(breadcrumb.IsValid());
239
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 7 cvmfs::MsgHash *msg_hash = new cvmfs::MsgHash();
240
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 7 transport->FillMsgHash(breadcrumb.catalog_hash, msg_hash);
241
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 7 cvmfs::MsgBreadcrumb *msg_breadcrumb = new cvmfs::MsgBreadcrumb();
242
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 7 msg_breadcrumb->set_fqrn(msg_req->fqrn());
243 7 msg_breadcrumb->set_allocated_hash(msg_hash);
244 7 msg_breadcrumb->set_timestamp(breadcrumb.timestamp);
245 7 msg_breadcrumb->set_revision(breadcrumb.revision);
246 7 msg_reply.set_allocated_breadcrumb(msg_breadcrumb);
247 }
248
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 14 transport->SendFrame(&frame_send);
249 14 }
250
251
252 126 void CachePlugin::HandleHandshake(cvmfs::MsgHandshake *msg_req,
253 CacheTransport *transport) {
254 126 const uint64_t session_id = NextSessionId();
255
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 126 if (msg_req->has_name()) {
256
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 126 sessions_[session_id] = SessionInfo(session_id, msg_req->name());
257 } else {
258 ✗ sessions_[session_id] = SessionInfo(
259 ✗ session_id, "anonymous client (" + StringifyInt(session_id) + ")");
260 }
261
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 126 cvmfs::MsgHandshakeAck msg_ack;
262
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 126 CacheTransport::Frame frame_send(&msg_ack);
263
264
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 126 msg_ack.set_status(cvmfs::STATUS_OK);
265
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 126 msg_ack.set_name(name_);
266 126 msg_ack.set_protocol_version(kPbProtocolVersion);
267 126 msg_ack.set_max_object_size(max_object_size_);
268 126 msg_ack.set_session_id(session_id);
269 126 msg_ack.set_capabilities(capabilities_);
270
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 126 if (is_local_)
271 126 msg_ack.set_pid(getpid());
272
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 126 transport->SendFrame(&frame_send);
273 126 }
274
275
276 28 void CachePlugin::HandleInfo(cvmfs::MsgInfoReq *msg_req,
277 CacheTransport *transport) {
278
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 28 const SessionCtxGuard session_guard(msg_req->session_id(), this);
279
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 28 cvmfs::MsgInfoReply msg_reply;
280
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 28 CacheTransport::Frame frame_send(&msg_reply);
281
282 28 msg_reply.set_req_id(msg_req->req_id());
283 28 Info info;
284
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 28 const cvmfs::EnumStatus status = GetInfo(&info);
285
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 28 if (status != cvmfs::STATUS_OK) {
286 ✗ LogSessionError(msg_req->session_id(), status,
287 "failed to query cache status");
288 }
289 28 msg_reply.set_size_bytes(info.size_bytes);
290 28 msg_reply.set_used_bytes(info.used_bytes);
291 28 msg_reply.set_pinned_bytes(info.pinned_bytes);
292 28 msg_reply.set_no_shrink(info.no_shrink);
293
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 28 msg_reply.set_status(status);
294
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 28 transport->SendFrame(&frame_send);
295 28 }
296
297
298 28 void CachePlugin::HandleIoctl(cvmfs::MsgIoctl *msg_req) {
299
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 28 if (!msg_req->has_conncnt_change_by())
300 ✗ return;
301 28 const int32_t conncnt_change_by = msg_req->conncnt_change_by();
302
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 28 if ((static_cast<int32_t>(num_inlimbo_clients_) + conncnt_change_by) < 0) {
303 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
304 "invalid request to drop connection counter below zero");
305 ✗ return;
306 }
307
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 28 if (conncnt_change_by > 0) {
308
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 14 LogSessionInfo(msg_req->session_id(), "lock session beyond lifetime");
309 } else {
310
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 14 LogSessionInfo(msg_req->session_id(), "release session lock");
311 }
312 28 num_inlimbo_clients_ += conncnt_change_by;
313 }
314
315
316 70 void CachePlugin::HandleList(cvmfs::MsgListReq *msg_req,
317 CacheTransport *transport) {
318
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 70 const SessionCtxGuard session_guard(msg_req->session_id(), this);
319
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 70 cvmfs::MsgListReply msg_reply;
320
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 70 CacheTransport::Frame frame_send(&msg_reply);
321
322 70 msg_reply.set_req_id(msg_req->req_id());
323 70 int64_t listing_id = msg_req->listing_id();
324 70 msg_reply.set_listing_id(listing_id);
325 70 msg_reply.set_is_last_part(true);
326
327 cvmfs::EnumStatus status;
328
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 70 if (msg_req->listing_id() == 0) {
329 42 listing_id = NextLstId();
330
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 42 status = ListingBegin(listing_id, msg_req->object_type());
331
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 42 if (status != cvmfs::STATUS_OK) {
332 ✗ LogSessionError(msg_req->session_id(), status,
333 "failed to start enumeration of objects");
334 ✗ msg_reply.set_status(status);
335 ✗ transport->SendFrame(&frame_send);
336 ✗ return;
337 }
338 42 msg_reply.set_listing_id(listing_id);
339 }
340
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 70 assert(listing_id != 0);
341
342
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 70 ObjectInfo item;
343 70 unsigned total_size = 0;
344
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 1400042 while ((status = ListingNext(listing_id, &item)) == cvmfs::STATUS_OK) {
345
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 1400000 cvmfs::MsgListRecord *msg_list_record = msg_reply.add_list_record();
346
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 1400000 cvmfs::MsgHash *msg_hash = new cvmfs::MsgHash();
347
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 1400000 transport->FillMsgHash(item.id, msg_hash);
348 1400000 msg_list_record->set_allocated_hash(msg_hash);
349 1400000 msg_list_record->set_pinned(item.pinned);
350
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 1400000 msg_list_record->set_description(item.description);
351 // Approximation of the message size
352 1400000 total_size += sizeof(item) + item.description.length();
353
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 1400000 if (total_size > kListingSize)
354 28 break;
355 }
356
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 70 if (status == cvmfs::STATUS_OUTOFBOUNDS) {
357
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 42 ListingEnd(listing_id);
358 42 status = cvmfs::STATUS_OK;
359 } else {
360 28 msg_reply.set_is_last_part(false);
361 }
362
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 70 if (status != cvmfs::STATUS_OK) {
363 ✗ LogSessionError(msg_req->session_id(), status, "failed enumerate objects");
364 }
365
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 70 msg_reply.set_status(status);
366
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 70 transport->SendFrame(&frame_send);
367
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 70 }
368
369
370 112 void CachePlugin::HandleObjectInfo(cvmfs::MsgObjectInfoReq *msg_req,
371 CacheTransport *transport) {
372
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 112 const SessionCtxGuard session_guard(msg_req->session_id(), this);
373
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 112 cvmfs::MsgObjectInfoReply msg_reply;
374
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 112 CacheTransport::Frame frame_send(&msg_reply);
375
376 112 msg_reply.set_req_id(msg_req->req_id());
377
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 112 shash::Any object_id;
378
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 112 const bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
379
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 112 if (!retval) {
380 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
381 "malformed hash received from client");
382 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
383 } else {
384
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 112 ObjectInfo info;
385
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 112 const cvmfs::EnumStatus status = GetObjectInfo(object_id, &info);
386
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 112 msg_reply.set_status(status);
387
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 112 if (status == cvmfs::STATUS_OK) {
388
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 105 msg_reply.set_object_type(info.object_type);
389 105 msg_reply.set_size(info.size);
390
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 7 } else if (status != cvmfs::STATUS_NOENTRY) {
391
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 7 LogSessionError(msg_req->session_id(), status,
392 "failed retrieving object details");
393 }
394 112 }
395
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 112 transport->SendFrame(&frame_send);
396 112 }
397
398
399 15477 void CachePlugin::HandleRead(cvmfs::MsgReadReq *msg_req,
400 CacheTransport *transport) {
401
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 15477 const SessionCtxGuard session_guard(msg_req->session_id(), this);
402
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 15477 cvmfs::MsgReadReply msg_reply;
403
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 15477 CacheTransport::Frame frame_send(&msg_reply);
404
405 15477 msg_reply.set_req_id(msg_req->req_id());
406
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 15477 shash::Any object_id;
407
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 15477 const bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
408
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 15477 if (!retval || (msg_req->size() > max_object_size_)) {
409 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
410 "malformed hash received from client");
411 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
412 ✗ transport->SendFrame(&frame_send);
413 ✗ return;
414 }
415 15477 unsigned size = msg_req->size();
416 #ifdef __APPLE__
417 unsigned char *buffer = reinterpret_cast<unsigned char *>(smalloc(size));
418 #else
419 15477 unsigned char buffer[size];
420 #endif
421
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 15477 const cvmfs::EnumStatus status = Pread(object_id, msg_req->offset(), &size,
422 buffer);
423
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 15477 msg_reply.set_status(status);
424
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 15477 if (status == cvmfs::STATUS_OK) {
425 15470 frame_send.set_attachment(buffer, size);
426 } else {
427
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 7 LogSessionError(msg_req->session_id(), status,
428 "failed to read from object");
429 }
430
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 15477 transport->SendFrame(&frame_send);
431 #ifdef __APPLE__
432 free(buffer);
433 #endif
434
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 30954 }
435
436
437 3948 void CachePlugin::HandleRefcount(cvmfs::MsgRefcountReq *msg_req,
438 CacheTransport *transport) {
439
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 3948 const SessionCtxGuard session_guard(msg_req->session_id(), this);
440
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 3948 cvmfs::MsgRefcountReply msg_reply;
441
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 3948 CacheTransport::Frame frame_send(&msg_reply);
442
443 3948 msg_reply.set_req_id(msg_req->req_id());
444
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 3948 shash::Any object_id;
445
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 3948 const bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
446
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 3948 if (!retval) {
447 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
448 "malformed hash received from client");
449 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
450 } else {
451
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 3948 const cvmfs::EnumStatus status = ChangeRefcount(object_id,
452 msg_req->change_by());
453
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 3948 msg_reply.set_status(status);
454
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 3948 if ((status != cvmfs::STATUS_OK) && (status != cvmfs::STATUS_NOENTRY)) {
455
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 7 LogSessionError(msg_req->session_id(), status,
456
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 14 "failed to open/close object " + object_id.ToString());
457 }
458 }
459
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 3948 transport->SendFrame(&frame_send);
460 3948 }
461
462
463 24213 bool CachePlugin::HandleRequest(int fd_con) {
464 24213 CacheTransport transport(fd_con, CacheTransport::kFlagSendIgnoreFailure);
465 24213 char buffer[max_object_size_];
466
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 24213 CacheTransport::Frame frame_recv;
467 24213 frame_recv.set_attachment(buffer, max_object_size_);
468
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 24213 const bool retval = transport.RecvFrame(&frame_recv);
469
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 24213 if (!retval) {
470 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
471 ✗ "failed to receive request from connection (%d)", errno);
472 ✗ return false;
473 }
474
475
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 24213 google::protobuf::MessageLite *msg_typed = frame_recv.GetMsgTyped();
476
477
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 24213 if (msg_typed->GetTypeName() == "cvmfs.MsgHandshake") {
478 126 cvmfs::MsgHandshake *msg_req = reinterpret_cast<cvmfs::MsgHandshake *>(
479 msg_typed);
480
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 126 HandleHandshake(msg_req, &transport);
481
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 24087 } else if (msg_typed->GetTypeName() == "cvmfs.MsgQuit") {
482 126 cvmfs::MsgQuit *msg_req = reinterpret_cast<cvmfs::MsgQuit *>(msg_typed);
483 378 const map<uint64_t, SessionInfo>::const_iterator iter = sessions_.find(
484
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 126 msg_req->session_id());
485
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 126 if (iter != sessions_.end()) {
486 126 free(iter->second.reponame);
487 126 free(iter->second.client_instance);
488 }
489
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 126 sessions_.erase(msg_req->session_id());
490 126 return false;
491
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 23961 } else if (msg_typed->GetTypeName() == "cvmfs.MsgIoctl") {
492
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 28 HandleIoctl(reinterpret_cast<cvmfs::MsgIoctl *>(msg_typed));
493
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 23933 } else if (msg_typed->GetTypeName() == "cvmfs.MsgRefcountReq") {
494 3948 cvmfs::MsgRefcountReq *msg_req = reinterpret_cast<cvmfs::MsgRefcountReq *>(
495 msg_typed);
496
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 3948 HandleRefcount(msg_req, &transport);
497
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 19985 } else if (msg_typed->GetTypeName() == "cvmfs.MsgObjectInfoReq") {
498 cvmfs::MsgObjectInfoReq
499 112 *msg_req = reinterpret_cast<cvmfs::MsgObjectInfoReq *>(msg_typed);
500
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 112 HandleObjectInfo(msg_req, &transport);
501
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 19873 } else if (msg_typed->GetTypeName() == "cvmfs.MsgReadReq") {
502 15477 cvmfs::MsgReadReq *msg_req = reinterpret_cast<cvmfs::MsgReadReq *>(
503 msg_typed);
504
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 15477 HandleRead(msg_req, &transport);
505
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 4396 } else if (msg_typed->GetTypeName() == "cvmfs.MsgStoreReq") {
506 4256 cvmfs::MsgStoreReq *msg_req = reinterpret_cast<cvmfs::MsgStoreReq *>(
507 msg_typed);
508
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 4256 HandleStore(msg_req, &frame_recv, &transport);
509
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 140 } else if (msg_typed->GetTypeName() == "cvmfs.MsgStoreAbortReq") {
510 cvmfs::MsgStoreAbortReq
511 7 *msg_req = reinterpret_cast<cvmfs::MsgStoreAbortReq *>(msg_typed);
512
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 7 HandleStoreAbort(msg_req, &transport);
513
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 133 } else if (msg_typed->GetTypeName() == "cvmfs.MsgInfoReq") {
514 28 cvmfs::MsgInfoReq *msg_req = reinterpret_cast<cvmfs::MsgInfoReq *>(
515 msg_typed);
516
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 28 HandleInfo(msg_req, &transport);
517
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 105 } else if (msg_typed->GetTypeName() == "cvmfs.MsgShrinkReq") {
518 14 cvmfs::MsgShrinkReq *msg_req = reinterpret_cast<cvmfs::MsgShrinkReq *>(
519 msg_typed);
520
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 14 HandleShrink(msg_req, &transport);
521
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 91 } else if (msg_typed->GetTypeName() == "cvmfs.MsgListReq") {
522 70 cvmfs::MsgListReq *msg_req = reinterpret_cast<cvmfs::MsgListReq *>(
523 msg_typed);
524
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 70 HandleList(msg_req, &transport);
525
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 21 } else if (msg_typed->GetTypeName() == "cvmfs.MsgBreadcrumbStoreReq") {
526 cvmfs::MsgBreadcrumbStoreReq
527 7 *msg_req = reinterpret_cast<cvmfs::MsgBreadcrumbStoreReq *>(msg_typed);
528
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 7 HandleBreadcrumbStore(msg_req, &transport);
529
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 14 } else if (msg_typed->GetTypeName() == "cvmfs.MsgBreadcrumbLoadReq") {
530 cvmfs::MsgBreadcrumbLoadReq
531 14 *msg_req = reinterpret_cast<cvmfs::MsgBreadcrumbLoadReq *>(msg_typed);
532
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 14 HandleBreadcrumbLoad(msg_req, &transport);
533 } else {
534 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
535 "unexpected message from client: %s",
536 ✗ std::string(msg_typed->GetTypeName()).c_str());
537 ✗ return false;
538 }
539
540 24087 return true;
541
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 48426 }
542
543
544 14 void CachePlugin::HandleShrink(cvmfs::MsgShrinkReq *msg_req,
545 CacheTransport *transport) {
546
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 14 const SessionCtxGuard session_guard(msg_req->session_id(), this);
547
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 14 cvmfs::MsgShrinkReply msg_reply;
548
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 14 CacheTransport::Frame frame_send(&msg_reply);
549
550 14 msg_reply.set_req_id(msg_req->req_id());
551 14 uint64_t used_bytes = 0;
552
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 14 const cvmfs::EnumStatus status = Shrink(msg_req->shrink_to(), &used_bytes);
553 14 msg_reply.set_used_bytes(used_bytes);
554
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 14 msg_reply.set_status(status);
555
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 14 if ((status != cvmfs::STATUS_OK) && (status != cvmfs::STATUS_PARTIAL)) {
556 ✗ LogSessionError(msg_req->session_id(), status, "failed to cleanup cache");
557 }
558
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 14 transport->SendFrame(&frame_send);
559 14 }
560
561
562 7 void CachePlugin::HandleStoreAbort(cvmfs::MsgStoreAbortReq *msg_req,
563 CacheTransport *transport) {
564
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 7 const SessionCtxGuard session_guard(msg_req->session_id(), this);
565
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 7 cvmfs::MsgStoreReply msg_reply;
566
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 7 CacheTransport::Frame frame_send(&msg_reply);
567 7 msg_reply.set_req_id(msg_req->req_id());
568 7 msg_reply.set_part_nr(0);
569 uint64_t txn_id;
570 7 const UniqueRequest uniq_req(msg_req->session_id(), msg_req->req_id());
571
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 7 const bool retval = txn_ids_.Lookup(uniq_req, &txn_id);
572
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 7 if (!retval) {
573 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
574 "malformed transaction id received from client");
575 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
576 } else {
577
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 7 const cvmfs::EnumStatus status = AbortTxn(txn_id);
578
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 7 msg_reply.set_status(status);
579
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 7 if (status != cvmfs::STATUS_OK) {
580 ✗ LogSessionError(msg_req->session_id(), status,
581 "failed to abort transaction");
582 }
583
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 7 txn_ids_.Erase(uniq_req);
584 }
585
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 7 transport->SendFrame(&frame_send);
586 7 }
587
588
589 4256 void CachePlugin::HandleStore(cvmfs::MsgStoreReq *msg_req,
590 CacheTransport::Frame *frame,
591 CacheTransport *transport) {
592
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 4256 const SessionCtxGuard session_guard(msg_req->session_id(), this);
593
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 4256 cvmfs::MsgStoreReply msg_reply;
594
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 4256 CacheTransport::Frame frame_send(&msg_reply);
595 4256 msg_reply.set_req_id(msg_req->req_id());
596 4256 msg_reply.set_part_nr(msg_req->part_nr());
597
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 4256 shash::Any object_id;
598
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 4256 bool retval = transport->ParseMsgHash(msg_req->object_id(), &object_id);
599
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 4256 if (!retval || (frame->att_size() > max_object_size_)
600
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 8512 || ((frame->att_size() < max_object_size_) && !msg_req->last_part())) {
601 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
602 "malformed hash or bad object size received from client");
603 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
604 ✗ transport->SendFrame(&frame_send);
605 ✗ return;
606 }
607
608 4256 const UniqueRequest uniq_req(msg_req->session_id(), msg_req->req_id());
609 uint64_t txn_id;
610 4256 cvmfs::EnumStatus status = cvmfs::STATUS_OK;
611
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 4256 if (msg_req->part_nr() == 1) {
612
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 49 if (txn_ids_.Contains(uniq_req)) {
613 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
614 "invalid attempt to restart running transaction");
615 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
616 ✗ transport->SendFrame(&frame_send);
617 ✗ return;
618 }
619 49 txn_id = NextTxnId();
620
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 49 ObjectInfo info;
621 49 info.id = object_id;
622
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 49 if (msg_req->has_expected_size()) {
623 49 info.size = msg_req->expected_size();
624 }
625
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 49 if (msg_req->has_object_type()) {
626 49 info.object_type = msg_req->object_type();
627 }
628
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 49 if (msg_req->has_description()) {
629
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 49 info.description = msg_req->description();
630 }
631
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 49 status = StartTxn(object_id, txn_id, info);
632
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 49 if (status != cvmfs::STATUS_OK) {
633 ✗ LogSessionError(msg_req->session_id(), status,
634 "failed to start transaction");
635 ✗ msg_reply.set_status(status);
636 ✗ transport->SendFrame(&frame_send);
637 ✗ return;
638 }
639
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 49 txn_ids_.Insert(uniq_req, txn_id);
640
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 49 } else {
641
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 4207 retval = txn_ids_.Lookup(uniq_req, &txn_id);
642
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 4207 if (!retval) {
643 ✗ LogSessionError(msg_req->session_id(), cvmfs::STATUS_MALFORMED,
644 "invalid transaction received from client");
645 ✗ msg_reply.set_status(cvmfs::STATUS_MALFORMED);
646 ✗ transport->SendFrame(&frame_send);
647 ✗ return;
648 }
649 }
650
651 // TODO(jblomer): check part number and send objects up in order
652
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 4256 if (frame->att_size() > 0) {
653
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 8498 status = WriteTxn(txn_id,
654 4249 reinterpret_cast<unsigned char *>(frame->attachment()),
655 frame->att_size());
656
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 4249 if (status != cvmfs::STATUS_OK) {
657 ✗ LogSessionError(msg_req->session_id(), status, "failure writing object");
658 ✗ msg_reply.set_status(status);
659 ✗ transport->SendFrame(&frame_send);
660 ✗ return;
661 }
662 }
663
664
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 4256 if (msg_req->last_part()) {
665
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 42 status = CommitTxn(txn_id);
666
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 42 if (status != cvmfs::STATUS_OK) {
667 ✗ LogSessionError(msg_req->session_id(), status,
668 "failure committing object");
669 }
670
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 42 txn_ids_.Erase(uniq_req);
671 }
672
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 4256 msg_reply.set_status(status);
673
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 4256 transport->SendFrame(&frame_send);
674
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 4256 }
675
676
677 119 bool CachePlugin::IsRunning() { return atomic_read32(&running_) != 0; }
678
679
680 119 bool CachePlugin::Listen(const string &locator) {
681
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 119 vector<string> tokens = SplitString(locator, '=');
682
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 119 if (tokens[0] == "unix") {
683
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 119 const string lock_path = tokens[1] + ".lock";
684
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 119 fd_socket_lock_ = TryLockFile(lock_path);
685
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 119 if (fd_socket_lock_ == -1) {
686 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
687 ✗ "failed to acquire lock file %s (%d)", lock_path.c_str(), errno);
688 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
689 ✗ return false;
690
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 119 } else if (fd_socket_lock_ == -2) {
691 // Another plugin process probably started in the meantime
692 ✗ NotifySupervisor(CacheTransport::kReadyNotification);
693 ✗ if (getenv(CacheTransport::kEnvReadyNotifyFd) == NULL) {
694 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogStderr,
695 "failed to lock on %s, file is busy", lock_path.c_str());
696 }
697 ✗ return false;
698 }
699
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 119 assert(fd_socket_lock_ >= 0);
700
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 119 fd_socket_ = MakeSocket(tokens[1], 0600);
701 119 is_local_ = true;
702
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 119 } else if (tokens[0] == "tcp") {
703 ✗ vector<string> tcp_address = SplitString(tokens[1], ':');
704 ✗ if (tcp_address.size() != 2) {
705 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug, "invalid locator: %s",
706 locator.c_str());
707 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
708 ✗ return false;
709 }
710 ✗ fd_socket_ = MakeTcpEndpoint(tcp_address[0], String2Uint64(tcp_address[1]));
711 ✗ } else {
712 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
713 "unknown endpoint in locator: %s", locator.c_str());
714 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
715 ✗ return false;
716 }
717
718
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 119 if (fd_socket_ < 0) {
719 ✗ if (errno == EADDRINUSE) {
720 // Another plugin process probably started in the meantime
721 ✗ NotifySupervisor(CacheTransport::kReadyNotification);
722 } else {
723 ✗ LogCvmfs(kLogCache, kLogSyslogErr | kLogDebug,
724 ✗ "failed to create endpoint %s (%d)", locator.c_str(), errno);
725 ✗ NotifySupervisor(CacheTransport::kFailureNotification);
726 }
727 ✗ is_local_ = false;
728 ✗ return false;
729 }
730 119 const int retval = listen(fd_socket_, 32);
731
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 119 assert(retval == 0);
732
733 119 return true;
734 119 }
735
736
737 28 void CachePlugin::LogSessionInfo(uint64_t session_id, const string &msg) {
738
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 56 string session_str("unidentified client (" + StringifyInt(session_id) + ")");
739
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 28 const map<uint64_t, SessionInfo>::const_iterator iter = sessions_.find(
740 28 session_id);
741
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 28 if (iter != sessions_.end()) {
742
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 28 session_str = iter->second.name;
743 }
744
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 28 LogCvmfs(kLogCache, kLogDebug | kLogSyslog, "session '%s': %s",
745 session_str.c_str(), msg.c_str());
746 28 }
747
748
749 21 void CachePlugin::LogSessionError(uint64_t session_id,
750 cvmfs::EnumStatus status,
751 const std::string &msg) {
752
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 42 string session_str("unidentified client (" + StringifyInt(session_id) + ")");
753
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 21 const map<uint64_t, SessionInfo>::const_iterator iter = sessions_.find(
754 21 session_id);
755
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 21 if (iter != sessions_.end()) {
756
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 21 session_str = iter->second.name;
757 }
758
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 21 LogCvmfs(kLogCache, kLogDebug | kLogSyslogErr, "session '%s': %s (%d - %s)",
759 session_str.c_str(), msg.c_str(), status,
760 CacheTransportCode2Ascii(status));
761 21 }
762
763
764 119 void *CachePlugin::MainProcessRequests(void *data) {
765 119 CachePlugin *cache_plugin = reinterpret_cast<CachePlugin *>(data);
766
767 119 platform_sighandler_t save_sigpipe = signal(SIGPIPE, SIG_IGN);
768
769 119 vector<struct pollfd> watch_fds;
770 // Elements 0, 1: control pipe, socket fd
771 struct pollfd watch_ctrl;
772 119 watch_ctrl.fd = cache_plugin->pipe_ctrl_[0];
773 119 watch_ctrl.events = POLLIN | POLLPRI;
774
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 119 watch_fds.push_back(watch_ctrl);
775 struct pollfd watch_socket;
776 119 watch_socket.fd = cache_plugin->fd_socket_;
777 119 watch_socket.events = POLLIN | POLLPRI;
778
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 119 watch_fds.push_back(watch_socket);
779
780 119 bool terminated = false;
781
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 31339 while (!terminated) {
782
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 125118 for (unsigned i = 0; i < watch_fds.size(); ++i)
783 93779 watch_fds[i].revents = 0;
784
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 31339 const int retval = poll(&watch_fds[0], watch_fds.size(), -1);
785
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 31339 if (retval < 0) {
786 ✗ if (errno == EINTR)
787 ✗ continue;
788 ✗ PANIC(kLogSyslogErr | kLogDebug, "cache plugin connection failure (%d)",
789 errno);
790 }
791
792 // Termination or detach
793
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 31339 if (watch_fds[0].revents) {
794 char signal;
795
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 7133 ReadPipe(watch_fds[0].fd, &signal, 1);
796
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 7133 if (signal == kSignalDetach) {
797
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 7014 cache_plugin->SendDetachRequests();
798 7014 continue;
799 }
800
801 // termination
802
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 119 if (watch_fds.size() > 2) {
803 ✗ LogCvmfs(kLogCache, kLogSyslogWarn | kLogDebug,
804 "terminating external cache manager with pending connections");
805 }
806 119 break;
807 }
808
809 // New connection
810
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 24206 if (watch_fds[1].revents) {
811 struct sockaddr_un remote;
812 126 socklen_t socket_size = sizeof(remote);
813
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 126 const int fd_con = accept(watch_fds[1].fd, (struct sockaddr *)&remote,
814 126 &socket_size);
815
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 126 if (fd_con < 0) {
816 ✗ LogCvmfs(kLogCache, kLogSyslogWarn | kLogDebug,
817 ✗ "failed to establish connection (%d)", errno);
818 ✗ continue;
819 }
820 struct pollfd watch_con;
821 126 watch_con.fd = fd_con;
822 126 watch_con.events = POLLIN | POLLPRI;
823
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 126 watch_fds.push_back(watch_con);
824
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 126 cache_plugin->connections_.insert(fd_con);
825 }
826
827 // New request
828
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 48419 for (unsigned i = 2; i < watch_fds.size();) {
829
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 24213 if (watch_fds[i].revents) {
830
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 24213 const bool proceed = cache_plugin->HandleRequest(watch_fds[i].fd);
831
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 24213 if (!proceed) {
832
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 126 close(watch_fds[i].fd);
833
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 126 cache_plugin->connections_.erase(watch_fds[i].fd);
834
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 126 watch_fds.erase(watch_fds.begin() + i);
835 126 if ((getenv(CacheTransport::kEnvReadyNotifyFd) != NULL)
836 ✗ && (cache_plugin->connections_.empty())
837
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 126 && (cache_plugin->num_inlimbo_clients_ == 0)) {
838 ✗ LogCvmfs(kLogCache, kLogSyslog,
839 "stopping cache plugin, no more active clients");
840 ✗ terminated = true;
841 ✗ break;
842 }
843 } else {
844 24087 i++;
845 }
846 } else {
847 ✗ i++;
848 }
849 }
850 }
851
852 // 0, 1 being closed by destructor
853
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 119 for (unsigned i = 2; i < watch_fds.size(); ++i)
854 ✗ close(watch_fds[i].fd);
855
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 119 cache_plugin->txn_ids_.Clear();
856
857 119 signal(SIGPIPE, save_sigpipe);
858 119 return NULL;
859 119 }
860
861
862 /**
863 * Used during startup to synchronize with the cvmfs client.
864 */
865 119 void CachePlugin::NotifySupervisor(char signal) {
866 119 char *pipe_ready = getenv(CacheTransport::kEnvReadyNotifyFd);
867
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 119 if (pipe_ready == NULL)
868 119 return;
869 ✗ const int fd_pipe_ready = String2Int64(pipe_ready);
870 ✗ WritePipe(fd_pipe_ready, &signal, 1);
871 }
872
873
874 119 void CachePlugin::ProcessRequests(unsigned num_workers) {
875 119 num_workers_ = num_workers;
876 119 const int retval = pthread_create(&thread_io_, NULL, MainProcessRequests,
877 this);
878
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 119 assert(retval == 0);
879 119 NotifySupervisor(CacheTransport::kReadyNotification);
880 119 atomic_cas32(&running_, 0, 1);
881 119 }
882
883
884 7014 void CachePlugin::SendDetachRequests() {
885 7014 set<int>::const_iterator iter = connections_.begin();
886 7014 const set<int>::const_iterator iter_end = connections_.end();
887
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 14028 for (; iter != iter_end; ++iter) {
888 7014 CacheTransport transport(*iter,
889 CacheTransport::kFlagSendIgnoreFailure
890
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 7014 | CacheTransport::kFlagSendNonBlocking);
891
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 7014 cvmfs::MsgDetach msg_detach;
892
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 7014 CacheTransport::Frame frame_send(&msg_detach);
893
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 7014 transport.SendFrame(&frame_send);
894 7014 }
895 7014 }
896
897
898 119 void CachePlugin::Terminate() {
899
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 119 if (IsRunning()) {
900 119 char terminate = kSignalTerminate;
901
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 119 WritePipe(pipe_ctrl_[1], &terminate, 1);
902
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 119 pthread_join(thread_io_, NULL);
903 119 atomic_cas32(&running_, 1, 0);
904 }
905 119 }
906
907
908 ✗ void CachePlugin::WaitFor() {
909 ✗ if (!IsRunning())
910 ✗ return;
911 ✗ pthread_join(thread_io_, NULL);
912 }
913