struct spx_msg *spx_header_to_msg(struct spx_msg_header *header,size_t len,err_t *err){/*{{{*/
if(NULL == header){
*err = EINVAL;
return NULL;
}
struct spx_msg *ctx = spx_msg_new(len,err);
if(NULL == ctx){
return NULL;
}
spx_msg_pack_u32(ctx,header->version);
spx_msg_pack_u32(ctx,header->protocol);
spx_msg_pack_u64(ctx,header->bodylen);
spx_msg_pack_u64(ctx,header->offset);
if(header->is_keepalive){
spx_msg_pack_true(ctx);
} else {
spx_msg_pack_false(ctx);
}
spx_msg_pack_u32(ctx,header->err);
return ctx;
}/*}}}*/
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;
}/*}}}*/
