/* * Copyright (c) 1999-2001 NCSA * All rights reserved. * * Programmer: Raymond Lu * Wednesday, April 12, 2000 * * Purpose: SRB I/O driver. */ #include "H5private.h" /*library functions */ #include "H5Eprivate.h" /*error handling */ #include "H5Fprivate.h" /*files */ #include "H5FDprivate.h" /*file driver */ #include "H5FDsrb.h" /* Core file driver */ #include "H5Iprivate.h" /*object IDs */ #include "H5MMprivate.h" /* Memory allocation */ #include "H5Pprivate.h" /*property lists */ /* The driver identification number, initialized at runtime */ static hid_t H5FD_SRB_g = 0; #ifdef H5_HAVE_SRB /* * This driver supports systems that have the lseek64() function by defining * some macros here so we don't have to have conditional compilations later * throughout the code. * * file_offset_t: The datatype for file offsets, the second argument of * the lseek() or lseek64() call. * * file_seek: The function which adjusts the current file position, * either lseek() or lseek64(). */ /* adding for windows NT file system support. */ #ifdef H5_HAVE_LSEEK64 # define file_offset_t off64_t # define file_seek lseek64 #elif defined (WIN32) # ifdef __MWERKS__ # define file_offset_t off_t # define file_seek lseek # else /*MSVC*/ # define file_offset_t __int64 # define file_seek _lseeki64 # endif #else # define file_offset_t off_t # define file_seek lseek #endif /* * These macros check for overflow of various quantities. These macros * assume that file_offset_t is signed and haddr_t and size_t are unsigned. * * ADDR_OVERFLOW: Checks whether a file address of type `haddr_t' * is too large to be represented by the second argument * of the file seek function. * * SIZE_OVERFLOW: Checks whether a buffer size of type `hsize_t' is too * large to be represented by the `size_t' type. * * REGION_OVERFLOW: Checks whether an address and size pair describe data * which can be addressed entirely by the second * argument of the file seek function. */ #define MAXADDR (((haddr_t)1<<(8*sizeof(file_offset_t)-1))-1) #define ADDR_OVERFLOW(A) (HADDR_UNDEF==(A) || \ ((A) & ~(haddr_t)MAXADDR)) #define SIZE_OVERFLOW(Z) ((Z) & ~(hsize_t)MAXADDR) #define REGION_OVERFLOW(A,Z) (ADDR_OVERFLOW(A) || SIZE_OVERFLOW(Z) || \ sizeof(file_offset_t)info; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_srb_open * * Purpose: Opens a file with name NAME. The FLAGS are a bit field with * purpose similar to the second argument of open(2) and which * are defined in H5Fpublic.h. The file access property list * FAPL_ID contains the properties driver properties and MAXADDR * is the largest address which this file will be expected to * access. * * Return: Success: A new file pointer. * * Failure: NULL * * Programmer: Raymond Lu * April 12, 2000 * Modifications: *------------------------------------------------------------------------- */ static H5FD_t * H5FD_srb_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr) { struct srbStat srb_stat; H5FD_srb_fapl_t *fa=NULL; H5FD_srb_fapl_t _fa; H5FD_srb_t *file; int srb_fid; H5P_genplist_t *plist; /* Property list pointer */ FUNC_ENTER_NOAPI(H5FD_srb_open, FAIL); /* Check arguments */ if (!name || !*name) HRETURN_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "invalid file name"); if (0==maxaddr || HADDR_UNDEF==maxaddr) HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr"); if (ADDR_OVERFLOW(maxaddr)) HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "bogus maxaddr"); if(TRUE!=H5P_isa_class(fapl_id,H5P_FILE_ACCESS) || NULL == (plist = H5I_object(fapl_id))) HRETURN_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list"); if(H5P_DEFAULT==fapl_id || H5FD_SRB!=H5P_get_driver(plist)) { memset((void*)&_fa, 0, sizeof(H5FD_srb_fapl_t)); fa = &_fa; } else { fa = H5P_get_driver_info(plist); assert(fa); } /* When I come down here, the possible flag values and the correct * responses are given here :- * * 1. H5F_ACC_CREAT | H5F_ACC_RDWR | H5F_ACC_EXCL : The file is * a new one. Go ahead and open it with srbObjCreate. * 2. H5F_ACC_CREAT | H5F_ACC_RDWR | H5F_ACC_TRUNC : how do I handle this? * srbObjCreate doesn't support truncate while srbObjOpen doesn't * support create. Try to call both srbFileCreate and srbFileOpen! * 3. H5F_ACC_RDWR | H5F_ACC_TRUNC : Use O_RDWR | O_TRUNC with srbObjOpen. * 4. H5F_ACC_RDWR : Use O_RDWR with srbObjOpen. * 5. Flag is not set : Use O_RDONLY with srbObjOpen. * * (In srbObjOpen, O_CREATE is not supported. For file creation, use * srbObjCreate.) */ if((flags & H5F_ACC_CREAT) && (flags & H5F_ACC_RDWR) && (flags & H5F_ACC_EXCL)) srb_fid = srbFileCreate(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, fa->info.mode, fa->info.size); else if((flags & H5F_ACC_CREAT) && (flags & H5F_ACC_RDWR) && (flags & H5F_ACC_TRUNC)) { if( (srb_fid = srbFileCreate(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, fa->info.mode, fa->info.size)) < 0 ) { srb_fid = srbFileOpen(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, O_RDWR|O_TRUNC, fa->info.mode); } } else if((flags & H5F_ACC_RDWR) && (flags & H5F_ACC_TRUNC)) srb_fid = srbFileOpen(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, O_RDWR|O_TRUNC, fa->info.mode); else if(flags & H5F_ACC_RDWR) srb_fid = srbFileOpen(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, O_RDWR, fa->info.mode); else srb_fid = srbFileOpen(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, O_RDONLY, fa->info.mode); if(srb_fid < 0) { fprintf(stderr, "cannot open file %s\n", name); fprintf(stderr,"%s",clErrorMessage(fa->srb_conn)); clFinish(fa->srb_conn); HRETURN_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "cannot open file"); } if(srbFileStat(fa->srb_conn, fa->info.storSysType, fa->info.srbHost, name, &srb_stat)!=0) { srbFileClose(fa->srb_conn, srb_fid); clFinish(fa->srb_conn); HRETURN_ERROR(H5E_IO, H5E_BADFILE, NULL, "SRB file stat failed"); } if (NULL==(file=H5MM_calloc(sizeof(H5FD_srb_t)))) HRETURN_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "can't allocate file struct"); file->fd = srb_fid; file->eof = srb_stat.st_size; file->pos = HADDR_UNDEF; file->srb_conn = fa->srb_conn; file->info = fa->info; FUNC_LEAVE((H5FD_t*)file); } /*------------------------------------------------------------------------- * Function: H5FD_srb_close * * Purpose: Closes a file and srb connection. * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Raymond Lu * Modification: *------------------------------------------------------------------------- */ static herr_t H5FD_srb_close(H5FD_t *_file) { H5FD_srb_t *file = (H5FD_srb_t *)_file; FUNC_ENTER_NOAPI(H5FD_srb_close, FAIL); srbFileClose(file->srb_conn, file->fd); clFinish(file->srb_conn); H5MM_xfree(file); FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_srb_query * * Purpose: Set the flags that this VFL driver is capable of supporting. * (listed in H5FDpublic.h) * * Return: Success: non-negative * * Failure: negative * * Programmer: Quincey Koziol * Tuesday, September 26, 2000 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_srb_query(const UNUSED H5FD_t *_f, unsigned long *flags /* out */) { herr_t ret_value=SUCCEED; FUNC_ENTER_NOAPI(H5FD_srb_query, FAIL); /* Set the VFL feature flags that this driver supports */ if(flags) { *flags = 0; *flags|=H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */ } FUNC_LEAVE(ret_value); } /*------------------------------------------------------------------------- * Function: H5FD_srb_get_eoa * * Purpose: Gets the end-of-address marker for the file. The EOA marker * is the first address past the last byte allocated in the * format address space. * * Return: Success: The end-of-address marker. * * Failure: HADDR_UNDEF * * Programmer: Raymond Lu * April 12, 2000 * * Modifications: *------------------------------------------------------------------------- */ static haddr_t H5FD_srb_get_eoa(H5FD_t *_file) { H5FD_srb_t *file = (H5FD_srb_t *)_file; FUNC_ENTER_NOAPI(H5FD_srb_get_eoa, HADDR_UNDEF); FUNC_LEAVE(file->eoa); } /*------------------------------------------------------------------------- * Function: H5FD_srb_set_eoa * * Purpose: Set the end-of-address marker for the file. This function is * called shortly after an existing HDF5 file is opened in order * to tell the driver where the end of the HDF5 data is located. * * Return: Success: 0 * * Failure: -1 * * Programmer: Robb Matzke * Friday, August 6, 1999 * * Modifications: * *------------------------------------------------------------------------- */ static herr_t H5FD_srb_set_eoa(H5FD_t *_file, haddr_t addr) { H5FD_srb_t *file = (H5FD_srb_t *)_file; FUNC_ENTER_NOAPI(H5FD_srb_set_eoa, FAIL); file->eoa = addr; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_srb_get_eof * * Purpose: Gets the end-of-file marker for the file. The EOF marker * is the real size of the file. * * Return: Success: The end-of-address marker. * * Failure: HADDR_UNDEF * * Programmer: Raymond Lu * April 12, 2000 * * Modifications: *------------------------------------------------------------------------- */ static haddr_t H5FD_srb_get_eof(H5FD_t *_file) { H5FD_srb_t *file = (H5FD_srb_t *)_file; FUNC_ENTER_NOAPI(H5FD_srb_get_eof, HADDR_UNDEF); FUNC_LEAVE(file->eof); } /*------------------------------------------------------------------------- * Function: H5FD_srb_read * * Purpose: Reads SIZE bytes of data from FILE beginning at address ADDR * into buffer BUF. * * Return: Success: Zero. Result is stored in caller-supplied * buffer BUF. * * Failure: -1, Contents of buffer BUF are undefined. * * Programmer: Raymond Lu *------------------------------------------------------------------------- */ static herr_t H5FD_srb_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr, size_t size, void *buf) { H5FD_srb_t *file = (H5FD_srb_t*)_file; ssize_t nbytes; FUNC_ENTER_NOAPI(H5FD_srb_read, FAIL); /* Check for overflow conditions */ if (HADDR_UNDEF==addr) HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "addr undefined"); if (REGION_OVERFLOW(addr, size)) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large"); if (addr+size>file->eoa) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large"); if( addr!=file->pos && srbFileSeek(file->srb_conn, (int)file->fd, (int)addr, SEEK_SET)<0 ) { file->pos = HADDR_UNDEF; srbFileClose(file->srb_conn, file->fd); clFinish(file->srb_conn); HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "srb file seek failed"); } /* * Read data, being careful of interrupted system calls, partial results, * and the end of the file. */ while(size>0) { if((nbytes=srbFileRead(file->srb_conn, (int)file->fd, (char*)buf, size))<0) { file->pos = HADDR_UNDEF; srbFileClose(file->srb_conn, file->fd); clFinish(file->srb_conn); HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "srb file write failed"); } if (0==nbytes) { /*end of file but not end of format address space*/ HDmemset(buf, 0, size); size = 0; } size -= nbytes; addr += (haddr_t)nbytes; buf = (char*)buf + nbytes; } /* Update current position */ file->pos = addr; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_srb_write * * Purpose: Writes SIZE bytes of data to FILE beginning at address ADDR * from buffer BUF. * * Return: Success: Zero. * * Failure: -1 * * Programmer: Raymond Lu * April 12, 2000 * Modifications: *------------------------------------------------------------------------- */ static herr_t H5FD_srb_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, haddr_t addr, size_t size, const void *buf) { H5FD_srb_t *file = (H5FD_srb_t*)_file; ssize_t nbytes; FUNC_ENTER_NOAPI(H5FD_srb_write, FAIL); /* Check for overflow conditions */ if (HADDR_UNDEF==addr) HRETURN_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "addr undefined"); if (REGION_OVERFLOW(addr, size)) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large"); if (addr+size>file->eoa) HRETURN_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr too large"); if( addr!=file->pos && srbFileSeek(file->srb_conn, (int)file->fd, (int)addr, SEEK_SET)<0 ) { file->pos = HADDR_UNDEF; srbObjClose(file->srb_conn, file->fd); clFinish(file->srb_conn); HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "srb file seek failed"); } while(size>0) { if( (nbytes=srbFileWrite(file->srb_conn, (int)file->fd, (char*)buf, size)) < 0 ) { file->pos = HADDR_UNDEF; srbObjClose(file->srb_conn, file->fd); clFinish(file->srb_conn); HRETURN_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "srb file write failed"); } size -= nbytes; addr += (haddr_t)nbytes; buf = (const char*)buf + nbytes; } /* Update current position and eof */ file->pos = addr; if(file->pos > file->eof) file->eof = file->pos; FUNC_LEAVE(SUCCEED); } /*------------------------------------------------------------------------- * Function: H5FD_srb_flush * * Purpose: Makes sure that all data is on disk. * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Raymond Lu * April 12, 2000 *------------------------------------------------------------------------- */ static herr_t H5FD_srb_flush(H5FD_t *_file, unsigned UNUSED closing) { H5FD_srb_t *file = (H5FD_srb_t*)_file; FUNC_ENTER_NOAPI(H5FD_srb_flush, FAIL); if(srbFileSync(file->srb_conn, file->fd) != 0) { srbFileClose(file->srb_conn, file->fd); clFinish(file->srb_conn); HRETURN_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "srb file sync failed"); } FUNC_LEAVE(SUCCEED); } #endif /* H5_HAVE_SRB */