mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-17 22:10:54 +00:00
113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
#include <Common/PipeFDs.h>
|
|
#include <Common/Exception.h>
|
|
#include <Common/formatReadable.h>
|
|
|
|
#include <common/logger_useful.h>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <string>
|
|
#include <algorithm>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int CANNOT_PIPE;
|
|
extern const int CANNOT_FCNTL;
|
|
extern const int LOGICAL_ERROR;
|
|
}
|
|
|
|
void LazyPipeFDs::open()
|
|
{
|
|
for (int & fd : fds_rw)
|
|
if (fd >= 0)
|
|
throw Exception("Pipe is already opened", ErrorCodes::LOGICAL_ERROR);
|
|
|
|
#ifndef __APPLE__
|
|
if (0 != pipe2(fds_rw, O_CLOEXEC))
|
|
throwFromErrno("Cannot create pipe", ErrorCodes::CANNOT_PIPE);
|
|
#else
|
|
if (0 != pipe(fds_rw))
|
|
throwFromErrno("Cannot create pipe", ErrorCodes::CANNOT_PIPE);
|
|
if (0 != fcntl(fds_rw[0], F_SETFD, FD_CLOEXEC))
|
|
throwFromErrno("Cannot setup auto-close on exec for read end of pipe", ErrorCodes::CANNOT_FCNTL);
|
|
if (0 != fcntl(fds_rw[1], F_SETFD, FD_CLOEXEC))
|
|
throwFromErrno("Cannot setup auto-close on exec for write end of pipe", ErrorCodes::CANNOT_FCNTL);
|
|
#endif
|
|
}
|
|
|
|
void LazyPipeFDs::close()
|
|
{
|
|
for (int & fd : fds_rw)
|
|
{
|
|
if (fd < 0)
|
|
continue;
|
|
if (0 != ::close(fd))
|
|
throwFromErrno("Cannot close pipe", ErrorCodes::CANNOT_PIPE);
|
|
fd = -1;
|
|
}
|
|
}
|
|
|
|
PipeFDs::PipeFDs()
|
|
{
|
|
open();
|
|
}
|
|
|
|
LazyPipeFDs::~LazyPipeFDs()
|
|
{
|
|
try
|
|
{
|
|
close();
|
|
}
|
|
catch (...)
|
|
{
|
|
tryLogCurrentException(__PRETTY_FUNCTION__);
|
|
}
|
|
}
|
|
|
|
|
|
void LazyPipeFDs::setNonBlocking()
|
|
{
|
|
int flags = fcntl(fds_rw[1], F_GETFL, 0);
|
|
if (-1 == flags)
|
|
throwFromErrno("Cannot get file status flags of pipe", ErrorCodes::CANNOT_FCNTL);
|
|
if (-1 == fcntl(fds_rw[1], F_SETFL, flags | O_NONBLOCK))
|
|
throwFromErrno("Cannot set non-blocking mode of pipe", ErrorCodes::CANNOT_FCNTL);
|
|
}
|
|
|
|
void LazyPipeFDs::tryIncreaseSize(int desired_size)
|
|
{
|
|
#if defined(OS_LINUX)
|
|
Poco::Logger * log = &Poco::Logger::get("Pipe");
|
|
|
|
/** Increase pipe size to avoid slowdown during fine-grained trace collection.
|
|
*/
|
|
int pipe_size = fcntl(fds_rw[1], F_GETPIPE_SZ);
|
|
if (-1 == pipe_size)
|
|
{
|
|
if (errno == EINVAL)
|
|
{
|
|
LOG_INFO(log, "Cannot get pipe capacity, " << errnoToString(ErrorCodes::CANNOT_FCNTL) << ". Very old Linux kernels have no support for this fcntl.");
|
|
/// It will work nevertheless.
|
|
}
|
|
else
|
|
throwFromErrno("Cannot get pipe capacity", ErrorCodes::CANNOT_FCNTL);
|
|
}
|
|
else
|
|
{
|
|
for (errno = 0; errno != EPERM && pipe_size < desired_size; pipe_size *= 2)
|
|
if (-1 == fcntl(fds_rw[1], F_SETPIPE_SZ, pipe_size * 2) && errno != EPERM)
|
|
throwFromErrno("Cannot increase pipe capacity to " + std::to_string(pipe_size * 2), ErrorCodes::CANNOT_FCNTL);
|
|
|
|
LOG_TRACE(log, "Pipe capacity is " << formatReadableSizeWithBinarySuffix(std::min(pipe_size, desired_size)));
|
|
}
|
|
#else
|
|
(void)desired_size;
|
|
#endif
|
|
}
|
|
|
|
}
|