class for handling gpfs_fcnt calls with their very special parameter handling More...

#include <gpfsFcntlHandler.h>

Public Member Functions
	gpfs_fcntl_handler ()

void	call (int fd, const std::string &path)

void	dump () const

Public Attributes
union {
gpfsFcntlHeader_t header

char justCharsProvidingSpace [GPFS_MAX_FCNTL_LENGTH]

}	buffer

Detailed Description

class for handling gpfs_fcnt calls with their very special parameter handling

Definition at line 6 of file gpfsFcntlHandler.h.

Constructor & Destructor Documentation

◆ gpfs_fcntl_handler()

gpfs_fcntl_handler::gpfs_fcntl_handler ( )

Definition at line 8 of file gpfsFcntlHandler.cpp.

                                        {
     buffer.header.totalLength = sizeof(buffer.header);
     buffer.header.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
     buffer.header.errorOffset = -1;
     buffer.header.fcntlReserved = 0;
 }

References buffer.

Member Function Documentation

◆ call()

void gpfs_fcntl_handler::call	(	int	fd,
		const std::string &	path
	)

Definition at line 15 of file gpfsFcntlHandler.cpp.

                                                            {
     auto result = gpfs_fcntl(fd, &buffer);
     if (result) {
         if (errno == ENOSYS) {
             throw unimplementedActionError("gpfs_fcntl not implemented here");
         }
         switch (buffer.header.errorOffset) {
             case -1: // unchanged, happens if fd does not point to a file on gpfs
                 throwcall::good0(result, "can't fcntl ", path, ", is not on a gpfs file system");
                 break;
             case 0:
  
                 throwcall::good0(result, "can't fcntl ", path,
                                  ", wrong version number ", buffer.header.fcntlVersion);
                 break;
             default:
                 int i = 0;
                 int o = 0;
                 while (o < buffer.header.errorOffset) {
                     std::cerr << o << "\n";
                     o += *reinterpret_cast<const int*>(&buffer.justCharsProvidingSpace[o]);
                     i++;
                 }
                 throwcall::good0(result, "can't fcntl ", path,
                                  ", wrong parameter in hint ", i,
                                  " at offset ", buffer.header.errorOffset);
         }
     }
 };

References buffer, and throwcall::good0().

Referenced by outputHandler::Gpfs::writerGpfs::doSpecialFdHandling(), main(), inputHandler::Gpfs::readerGpfs::readerGpfs(), gpfsIoCommon::releaseUsedBlocks(), inputHandler::Gpfs::readerGpfs::~readerGpfs(), and outputHandler::Gpfs::writerGpfs::~writerGpfs().

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◆ dump()

void gpfs_fcntl_handler::dump ( ) const

Definition at line 45 of file gpfsFcntlHandler.cpp.

                                     {
     std::cerr << "dump of fcntl struct at " << (void*)this << "\n";
     for (int i = 0; i < buffer.header.totalLength; i += sizeof(int)) {
         std::cerr << *reinterpret_cast<const int*>(&buffer.justCharsProvidingSpace[i]) << "\n";
     }
 }

References buffer.

Member Data Documentation

◆ buffer

union { ... } gpfs_fcntl_handler::buffer

Referenced by call(), outputHandler::Gpfs::writerGpfs::doSpecialFdHandling(), dump(), gpfs_fcntl_handler(), main(), inputHandler::Gpfs::readerGpfs::readerGpfs(), gpfsIoCommon::releaseUsedBlocks(), inputHandler::Gpfs::readerGpfs::~readerGpfs(), and outputHandler::Gpfs::writerGpfs::~writerGpfs().

◆ header

gpfsFcntlHeader_t gpfs_fcntl_handler::header

Definition at line 9 of file gpfsFcntlHandler.h.

◆ justCharsProvidingSpace

char gpfs_fcntl_handler::justCharsProvidingSpace[GPFS_MAX_FCNTL_LENGTH]

Definition at line 10 of file gpfsFcntlHandler.h.

The documentation for this class was generated from the following files:

Public Member Functions

Public Attributes