err_t ydb_storage_dio_delete_context_from_chunkfile( struct ydb_storage_configurtion *c, string_t fname, u64_t cbegin, u64_t ctotalsize, u32_t copver, u32_t cver, u64_t clastmodifytime, u64_t crealsize, u64_t lastmodifytime){/*{{{*/ err_t err = 0; struct spx_msg *ioctx = NULL; int fd = 0; char *mptr = NULL; string_t io_suffix = NULL; string_t io_hashcode = NULL; bool_t io_isdelete = false; u32_t io_opver = 0; u32_t io_ver = 0; u64_t io_createtime = 0; u64_t io_lastmodifytime = 0; u64_t io_totalsize = 0; u64_t io_realsize = 0; u32_t unit = (int) cbegin / c->pagesize; u64_t begin = unit * c->pagesize; u64_t offset = cbegin - begin; u64_t len = offset + ctotalsize; fd = open(fname,O_RDWR,SpxFileMode); if(0 == fd){ err = errno; SpxLogFmt2(c->log,SpxLogError,err,\ "open chunkfile:%s is fail.", fname); goto r1; } mptr = mmap(NULL,\ len,PROT_READ | PROT_WRITE ,\ MAP_SHARED,fd,begin); if(MAP_FAILED == mptr){ err = errno; SpxLogFmt2(c->log,SpxLogError,err,\ "mmap chunkfile:%s with begin:%lld,length:%lld is fail.", fname,begin,len); goto r1; } ioctx = spx_msg_new(YDB_CHUNKFILE_MEMADATA_SIZE,&err); if(NULL == ioctx){ SpxLog2(c->log,SpxLogError,err,\ "alloc metedata ioctx is fail."); goto r1; } if(0 != (err = spx_msg_pack_ubytes(ioctx, ((ubyte_t *) (mptr+ offset)), YDB_CHUNKFILE_MEMADATA_SIZE))){ SpxLog2(c->log,SpxLogError,err,\ "read metedata to ioctx is fail."); goto r1; } spx_msg_seek(ioctx,0,SpxMsgSeekSet); err = ydb_storage_dio_parser_metadata(c->log,ioctx, &io_isdelete,&io_opver, &io_ver,&io_createtime, &io_lastmodifytime,&io_totalsize,&io_realsize, &io_suffix,&io_hashcode); if(0 != err){ SpxLog2(c->log,SpxLogError,err,\ "unpack metedate ioctx is fail."); goto r1; } if(io_isdelete){ SpxLogFmt1(c->log,SpxLogError, "the file in the chunkfile:%s " "with begin:%lld totalsize:%lld is deleted.", fname,cbegin,ctotalsize); err = ENOENT; goto r1; } if(copver != io_opver || cver != io_ver || clastmodifytime != io_lastmodifytime || ctotalsize != io_totalsize || crealsize != io_realsize){ SpxLogFmt1(c->log,SpxLogError, "the file in the chunkfile:%s " "with begin:%lld totalsize:%lld is not the deleting-file.", fname,cbegin,ctotalsize); err = ENOENT; goto r1; } spx_msg_seek(ioctx,0,SpxMsgSeekSet); spx_msg_pack_true(ioctx);//isdelete spx_msg_pack_u32(ioctx,copver + 1); spx_msg_pack_u32(ioctx,YDB_VERSION); spx_msg_seek(ioctx,sizeof(u64_t),SpxMsgSeekCurrent);//jump createtime spx_msg_pack_u64(ioctx,lastmodifytime); memcpy(mptr + offset,ioctx->buf,YDB_CHUNKFILE_MEMADATA_SIZE); r1: if(NULL != ioctx){ SpxMsgFree(ioctx); } if(NULL != mptr){ munmap(mptr,len); } if(0 < fd){ SpxClose(fd); } if(NULL != io_hashcode){ SpxStringFree(io_hashcode); } if(NULL != io_suffix){ SpxStringFree(io_suffix); } return err; }/*}}}*/
err_t spx_msg_align(struct spx_msg *ctx,off_t offset){ return spx_msg_seek(ctx,offset,SpxMsgSeekCurrent); }
err_t spx_read_to_msg_nb(int fd,struct spx_msg *ctx,const size_t size,size_t *len){/*{{{*/ err_t err = spx_read_nb(fd,(byte_t *) ctx->last,size,len); spx_msg_seek(ctx,spx_msg_len(ctx),SpxMsgSeekSet); ctx->busylen = *len; return err; }/*}}}*/