/* return 0 if ok */
static ZERO_OR_ERROR FS_w_local(struct one_wire_query *owq)
{
// Device already locked
struct parsedname *pn = PN(owq);
struct filetype * ft = pn->selected_filetype ;
/* Writable? */
if ( ft->write == NO_WRITE_FUNCTION ) {
return -ENOTSUP;
}
/* Special case for "fake" adapter */
switch (get_busmode(pn->selected_connection)) {
case bus_mock:
case bus_fake:
case bus_tester:
return 0 ;
default:
// non-virtual devices get handled below
break ;
}
/* Non-array? */
if ( ft->ag == NON_AGGREGATE ) {
LEVEL_DEBUG("Write a non-array element %s",pn->path);
return FS_write_owq(owq);
}
/* array */
switch ( ft->ag->combined ) {
case ag_sparse:
// avoid cache
return (ft->write) (owq);;
case ag_aggregate:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Write an aggregate .BYTE %s",pn->path);
return FS_write_owq(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Write an aggregate .ALL %s",pn->path);
return FS_write_all(owq);
default:
LEVEL_DEBUG("Write an aggregate element %s",pn->path);
return FS_write_a_part(owq) ;
}
case ag_mixed:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Write a mixed .BYTE %s",pn->path);
OWQ_Cache_Del_parts(owq);
return FS_write_owq(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Write a mixed .ALL %s",pn->path);
OWQ_Cache_Del_parts(owq);
return FS_write_all(owq);
default:
LEVEL_DEBUG("Write a mixed element %s",pn->path);
OWQ_Cache_Del_ALL(owq);
OWQ_Cache_Del_BYTE(owq);
return FS_write_owq(owq);
}
case ag_separate:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Write a separate .BYTE %s",pn->path);
return FS_write_as_bits(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Write a separate .ALL %s",pn->path);
return FS_write_in_parts(owq);
default:
LEVEL_DEBUG("Write a separate element %s",pn->path);
return FS_write_owq(owq);
}
default:
return -ENOENT ;
}
}
/* Real read -- called from read
Integrates with cache -- read not called if cached value already set
*/
static SIZE_OR_ERROR FS_r_local(struct one_wire_query *owq)
{
// Bus and device already locked
struct parsedname *pn = PN(owq);
struct filetype * ft = pn->selected_filetype ;
/* Readable? */
if (ft->read == NO_READ_FUNCTION) {
return -ENOTSUP;
}
// Check buffer length
adjust_file_size(owq) ;
if ( OWQ_size(owq) == 0 ) {
// Mounting fuse with "direct_io" will cause a second read with offset
// at end-of-file... Just return 0 if offset == size
LEVEL_DEBUG("Call for read at very end of file") ;
return 0 ;
}
// Special check for alias -- it's ok for fake and tester and mock as well
if ( ft->read == FS_r_alias ) {
return FS_read_owq(owq) ;
}
if (ft->change != fc_static && ft->format != ft_alias && IsRealDir(pn)) {
switch (pn->selected_connection->Adapter) {
case adapter_fake:
/* Special case for "fake" adapter */
return FS_read_fake(owq);
case adapter_tester:
/* Special case for "tester" adapter */
return FS_read_tester(owq);
case adapter_mock:
/* Special case for "mock" adapter */
if ( GOOD( OWQ_Cache_Get(owq)) ) { // cached
return 0;
}
return FS_read_fake(owq);
default:
break ;
}
}
if ( ft->ag == NON_AGGREGATE ) { /* non array property */
return FS_read_owq(owq) ;
}
/* Array property
* Read separately?
* Read together and manually separate? */
/* array */
switch ( ft->ag->combined ) {
case ag_sparse:
// skip cache test and storing
return (ft->read) (owq);
case ag_aggregate:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Read an aggregate .BYTE %s",pn->path);
return FS_read_owq(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Read an aggregate .ALL %s",pn->path);
return FS_read_all(owq);
default:
LEVEL_DEBUG("Read an aggregate element %s",pn->path);
return FS_read_a_part(owq);
}
case ag_mixed:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Read a mixed .BYTE %s",pn->path);
OWQ_Cache_Del_parts(owq);
return FS_read_owq(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Read a mixed .ALL %s",pn->path);
OWQ_Cache_Del_parts(owq);
return FS_read_all(owq);
default:
LEVEL_DEBUG("Read a mixed element %s",pn->path);
OWQ_Cache_Del_ALL(owq);
OWQ_Cache_Del_BYTE(owq);
return FS_read_owq(owq);
}
case ag_separate:
switch (pn->extension) {
case EXTENSION_BYTE:
LEVEL_DEBUG("Read a separate .BYTE %s",pn->path);
return FS_read_all_bits(owq);
case EXTENSION_ALL:
LEVEL_DEBUG("Read a separate .ALL %s",pn->path);
return FS_read_in_parts(owq);
default:
LEVEL_DEBUG("Read a separate element %s",pn->path);
return FS_read_owq(owq);
}
default:
return -ENOENT ;
}
}