| Line |
Branch |
Exec |
Source |
| 1 |
|
|
/** |
| 2 |
|
|
* This file is part of the CernVM File System. |
| 3 |
|
|
*/ |
| 4 |
|
|
|
| 5 |
|
|
|
| 6 |
|
|
#include "quota_listener.h" |
| 7 |
|
|
|
| 8 |
|
|
#include <poll.h> |
| 9 |
|
|
#include <pthread.h> |
| 10 |
|
|
|
| 11 |
|
|
#include <cstdlib> |
| 12 |
|
|
|
| 13 |
|
|
#include "catalog_mgr.h" |
| 14 |
|
|
#include "quota.h" |
| 15 |
|
|
#include "util/exception.h" |
| 16 |
|
|
#include "util/logging.h" |
| 17 |
|
|
#include "util/posix.h" |
| 18 |
|
|
#include "util/smalloc.h" |
| 19 |
|
|
|
| 20 |
|
|
using namespace std; // NOLINT |
| 21 |
|
|
|
| 22 |
|
|
namespace quota { |
| 23 |
|
|
|
| 24 |
|
|
struct ListenerHandle { |
| 25 |
|
|
int pipe_backchannel[2]; |
| 26 |
|
|
int pipe_terminate[2]; |
| 27 |
|
|
QuotaManager *quota_manager; |
| 28 |
|
|
CatalogManager *catalog_manager; |
| 29 |
|
|
string repository_name; |
| 30 |
|
|
pthread_t thread_listener; |
| 31 |
|
|
}; |
| 32 |
|
|
|
| 33 |
|
|
|
| 34 |
|
✗ |
static void *MainUnpinListener(void *data) { |
| 35 |
|
✗ |
ListenerHandle *handle = static_cast<ListenerHandle *>(data); |
| 36 |
|
✗ |
LogCvmfs(kLogQuota, kLogDebug, "starting unpin listener for %s", |
| 37 |
|
|
handle->repository_name.c_str()); |
| 38 |
|
|
|
| 39 |
|
|
struct pollfd *watch_fds = static_cast<struct pollfd *>( |
| 40 |
|
✗ |
smalloc(2 * sizeof(struct pollfd))); |
| 41 |
|
✗ |
watch_fds[0].fd = handle->pipe_terminate[0]; |
| 42 |
|
✗ |
watch_fds[0].events = POLLIN | POLLPRI; |
| 43 |
|
✗ |
watch_fds[0].revents = 0; |
| 44 |
|
✗ |
watch_fds[1].fd = handle->pipe_backchannel[0]; |
| 45 |
|
✗ |
watch_fds[1].events = POLLIN | POLLPRI; |
| 46 |
|
✗ |
watch_fds[1].revents = 0; |
| 47 |
|
|
while (true) { |
| 48 |
|
✗ |
const int retval = poll(watch_fds, 2, -1); |
| 49 |
|
✗ |
if (retval < 0) { |
| 50 |
|
✗ |
continue; |
| 51 |
|
|
} |
| 52 |
|
|
|
| 53 |
|
|
// Terminate I/O thread |
| 54 |
|
✗ |
if (watch_fds[0].revents) |
| 55 |
|
✗ |
break; |
| 56 |
|
|
|
| 57 |
|
|
// Release pinned catalogs |
| 58 |
|
✗ |
if (watch_fds[1].revents) { |
| 59 |
|
✗ |
watch_fds[1].revents = 0; |
| 60 |
|
|
char cmd; |
| 61 |
|
✗ |
ReadPipe(handle->pipe_backchannel[0], &cmd, sizeof(cmd)); |
| 62 |
|
✗ |
if (cmd == 'R') { |
| 63 |
|
✗ |
handle->catalog_manager->DetachNested(); |
| 64 |
|
✗ |
LogCvmfs(kLogQuota, kLogDebug | kLogSyslog, "released nested catalogs"); |
| 65 |
|
|
} |
| 66 |
|
|
} |
| 67 |
|
|
} |
| 68 |
|
✗ |
free(watch_fds); |
| 69 |
|
|
|
| 70 |
|
✗ |
LogCvmfs(kLogQuota, kLogDebug, "stopping unpin listener for %s", |
| 71 |
|
|
handle->repository_name.c_str()); |
| 72 |
|
✗ |
return NULL; |
| 73 |
|
|
} |
| 74 |
|
|
|
| 75 |
|
|
|
| 76 |
|
✗ |
static void *MainWatchdogListener(void *data) { |
| 77 |
|
✗ |
ListenerHandle *handle = static_cast<ListenerHandle *>(data); |
| 78 |
|
✗ |
LogCvmfs(kLogQuota, kLogDebug, "starting cache manager watchdog for %s", |
| 79 |
|
|
handle->repository_name.c_str()); |
| 80 |
|
|
|
| 81 |
|
|
struct pollfd *watch_fds = static_cast<struct pollfd *>( |
| 82 |
|
✗ |
smalloc(2 * sizeof(struct pollfd))); |
| 83 |
|
✗ |
watch_fds[0].fd = handle->pipe_terminate[0]; |
| 84 |
|
✗ |
watch_fds[0].events = POLLIN | POLLPRI; |
| 85 |
|
✗ |
watch_fds[0].revents = 0; |
| 86 |
|
✗ |
watch_fds[1].fd = handle->pipe_backchannel[0]; |
| 87 |
|
✗ |
watch_fds[1].events = POLLIN | POLLPRI; |
| 88 |
|
✗ |
watch_fds[1].revents = 0; |
| 89 |
|
|
while (true) { |
| 90 |
|
✗ |
const int retval = poll(watch_fds, 2, -1); |
| 91 |
|
✗ |
if (retval < 0) { |
| 92 |
|
✗ |
continue; |
| 93 |
|
|
} |
| 94 |
|
|
|
| 95 |
|
|
// Terminate I/O thread |
| 96 |
|
✗ |
if (watch_fds[0].revents) |
| 97 |
|
✗ |
break; |
| 98 |
|
|
|
| 99 |
|
|
// Release pinned catalogs |
| 100 |
|
✗ |
if (watch_fds[1].revents) { |
| 101 |
|
✗ |
if ((watch_fds[1].revents & POLLERR) || (watch_fds[1].revents & POLLHUP) |
| 102 |
|
✗ |
|| (watch_fds[1].revents & POLLNVAL)) { |
| 103 |
|
✗ |
PANIC(kLogDebug | kLogSyslogErr, "cache manager disappeared, aborting"); |
| 104 |
|
|
} |
| 105 |
|
|
// Clean the pipe |
| 106 |
|
✗ |
watch_fds[1].revents = 0; |
| 107 |
|
|
char dummy; |
| 108 |
|
✗ |
ReadPipe(handle->pipe_backchannel[0], &dummy, sizeof(dummy)); |
| 109 |
|
|
} |
| 110 |
|
|
} |
| 111 |
|
✗ |
free(watch_fds); |
| 112 |
|
|
|
| 113 |
|
✗ |
LogCvmfs(kLogQuota, kLogDebug, "stopping cache manager watchdog for %s", |
| 114 |
|
|
handle->repository_name.c_str()); |
| 115 |
|
✗ |
return NULL; |
| 116 |
|
|
} |
| 117 |
|
|
|
| 118 |
|
|
|
| 119 |
|
|
/** |
| 120 |
|
|
* Registers a back channel that reacts on high watermark of pinned chunks |
| 121 |
|
|
*/ |
| 122 |
|
✗ |
ListenerHandle *RegisterUnpinListener(QuotaManager *quota_manager, |
| 123 |
|
|
CatalogManager *catalog_manager, |
| 124 |
|
|
const string &repository_name) { |
| 125 |
|
✗ |
ListenerHandle *handle = new ListenerHandle(); |
| 126 |
|
✗ |
quota_manager->RegisterBackChannel(handle->pipe_backchannel, repository_name); |
| 127 |
|
✗ |
MakePipe(handle->pipe_terminate); |
| 128 |
|
✗ |
handle->quota_manager = quota_manager; |
| 129 |
|
✗ |
handle->catalog_manager = catalog_manager; |
| 130 |
|
✗ |
handle->repository_name = repository_name; |
| 131 |
|
|
const int retval = |
| 132 |
|
✗ |
pthread_create(&handle->thread_listener, NULL, MainUnpinListener, |
| 133 |
|
|
static_cast<void *>(handle)); |
| 134 |
|
✗ |
assert(retval == 0); |
| 135 |
|
✗ |
return handle; |
| 136 |
|
|
} |
| 137 |
|
|
|
| 138 |
|
|
|
| 139 |
|
|
/** |
| 140 |
|
|
* Registers a back channel that kills the fuse module if the cache manager |
| 141 |
|
|
* disappears |
| 142 |
|
|
*/ |
| 143 |
|
✗ |
ListenerHandle *RegisterWatchdogListener(QuotaManager *quota_manager, |
| 144 |
|
|
const string &repository_name) { |
| 145 |
|
✗ |
ListenerHandle *handle = new ListenerHandle(); |
| 146 |
|
✗ |
quota_manager->RegisterBackChannel(handle->pipe_backchannel, repository_name); |
| 147 |
|
✗ |
MakePipe(handle->pipe_terminate); |
| 148 |
|
✗ |
handle->quota_manager = quota_manager; |
| 149 |
|
✗ |
handle->catalog_manager = NULL; |
| 150 |
|
✗ |
handle->repository_name = repository_name; |
| 151 |
|
|
const int retval = |
| 152 |
|
✗ |
pthread_create(&handle->thread_listener, NULL, MainWatchdogListener, |
| 153 |
|
|
static_cast<void *>(handle)); |
| 154 |
|
✗ |
assert(retval == 0); |
| 155 |
|
✗ |
return handle; |
| 156 |
|
|
} |
| 157 |
|
|
|
| 158 |
|
|
|
| 159 |
|
✗ |
void UnregisterListener(ListenerHandle *handle) { |
| 160 |
|
✗ |
const char terminate = 'T'; |
| 161 |
|
✗ |
WritePipe(handle->pipe_terminate[1], &terminate, sizeof(terminate)); |
| 162 |
|
✗ |
pthread_join(handle->thread_listener, NULL); |
| 163 |
|
✗ |
ClosePipe(handle->pipe_terminate); |
| 164 |
|
|
|
| 165 |
|
✗ |
handle->quota_manager->UnregisterBackChannel(handle->pipe_backchannel, |
| 166 |
|
✗ |
handle->repository_name); |
| 167 |
|
|
|
| 168 |
|
✗ |
delete handle; |
| 169 |
|
|
} |
| 170 |
|
|
|
| 171 |
|
|
} // namespace quota |
| 172 |
|
|
|