Verified Commit 965614f4 authored by Ramon Nou's avatar Ramon Nou Committed by Marc Vef
Browse files

Create an user_functions.hpp

parent 395e9329

examples/gfind/gkfs_lib_example.cpp

+11 −18
Original line number Diff line number Diff line
@@ -41,35 +41,26 @@ 
#include <unistd.h>

#include <limits>

#include <cstdint>

#include <client/gkfs_functions.hpp>

#include <client/user_functions.hpp>



using namespace std;



/* Function exported from GekkoFS LD_PRELOAD, code needs to be compiled with

 * -fPIC */

extern "C" int

gkfs_init() __attribute__((weak));



extern "C" int

gkfs_end() __attribute__((weak));



void

init_preload(){};

void

destroy_preload(){};



void

write_file(std::string filename) {

    // Open File

    int fd = gkfs::syscall::gkfs_open(filename, S_IRWXU, O_RDWR | O_CREAT);



    cout << "FD open  " << fd << endl;

    char* buf = "testing";



    int size = gkfs::syscall::gkfs_write(fd, buf, 7);

    char* bufwrite = (char*) malloc(10);

    strncpy(bufwrite, "testing", 7);





    cout << "FD size" << size << endl;

    int size = gkfs::syscall::gkfs_write(fd, bufwrite, 7);



    cout << "Writting size " << size << endl;



    free(bufwrite);

    gkfs::syscall::gkfs_close(fd);

}
@@ -82,10 +73,12 @@ read_file(std::string filename) { 
    char* bufread = (char*) malloc(10);

    int sizeread = gkfs::syscall::gkfs_read(fdread, bufread, 7);



    cout << "Reading : " << sizeread << " --> " << bufread << endl;

    cout << "Reading Size: " << sizeread << " Content: " << bufread << endl;



    free(bufread);

    gkfs::syscall::gkfs_close(fdread);

}



int

main(int argc, char** argv) {

    cout << "GekkoFS Client library test" << endl;

include/client/CMakeLists.txt

+1 −0
Original line number Diff line number Diff line
@@ -79,4 +79,5 @@ target_sources( 
         syscalls/syscall.hpp

         syscalls/detail/syscall_info.h

         void_syscall_intercept.hpp

         user_functions.hpp

)

include/client/gkfs_functions.hpp

+1 −0
Original line number Diff line number Diff line
@@ -163,4 +163,5 @@ gkfs_rename(const std::string& old_path, const std::string& new_path); 
extern "C" int

gkfs_getsingleserverdir(const char* path, struct dirent_extended* dirp,

                        unsigned int count, int server);



#endif // GEKKOFS_GKFS_FUNCTIONS_HPP

include/client/preload.hpp

+2 −6
Original line number Diff line number Diff line
@@ -41,16 +41,12 @@ void 
init_ld_env_if_needed();

} // namespace gkfs::preload



#ifndef BYPASS_SYSCALL

void

init_preload() __attribute__((constructor));



void

destroy_preload() __attribute__((destructor));



extern "C" int

gkfs_init();



extern "C" int

gkfs_end();

#endif



#endif // IOINTERCEPT_PRELOAD_HPP

include/client/user_functions.hpp

0 → 100644
+67 −0
Original line number Diff line number Diff line 
/*

  Copyright 2018-2022, Barcelona Supercomputing Center (BSC), Spain

  Copyright 2015-2022, Johannes Gutenberg Universitaet Mainz, Germany



  This software was partially supported by the

  EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).



  This software was partially supported by the

  ADA-FS project under the SPPEXA project funded by the DFG.



  This file is part of GekkoFS' POSIX interface.



  GekkoFS' POSIX interface is free software: you can redistribute it and/or

  modify it under the terms of the GNU Lesser General Public License as

  published by the Free Software Foundation, either version 3 of the License,

  or (at your option) any later version.



  GekkoFS' POSIX interface is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU Lesser General Public License for more details.



  You should have received a copy of the GNU Lesser General Public License

  along with GekkoFS' POSIX interface.  If not, see

  <https://www.gnu.org/licenses/>.



  SPDX-License-Identifier: LGPL-3.0-or-later

*/



#ifndef GEKKOFS_USER_FUNCTIONS_HPP

#define GEKKOFS_USER_FUNCTIONS_HPP

#include <sys/types.h>

#include <sys/stat.h>

#include <string>

#include <cstdint>



namespace gkfs::syscall {



int

gkfs_open(const std::string& path, mode_t mode, int flags);



int

gkfs_remove(const std::string& path);





ssize_t

gkfs_write(int fd, const void* buf, size_t count);





ssize_t

gkfs_read(int fd, void* buf, size_t count);





int

gkfs_close(unsigned int fd);





} // namespace gkfs::syscall





extern "C" int

gkfs_init();



extern "C" int

gkfs_end();



#endif // GEKKOFS_USER_FUNCTIONS_HPP