void close_eraseblks(fs_context& fs)
{
/* TODO: Error handling missing! */
for (eb_id_t eb_id = 1; eb_id < fs.neraseblocks; ++eb_id)
{
if (fs.eb_usage[eb_id].e_type == eraseblock_type::ebin)
continue; /* can never be "open" */
if (fs.eb_usage[eb_id].e_type == eraseblock_type::empty)
continue; /* can never be "open" */
eraseblock_type eb_type = fs.eb_usage[eb_id].e_type;
unsigned int writeops = get_be16(fs.eb_usage[eb_id].e_writeops);
unsigned int max_writeops = fs.erasesize / fs.clustersize;
if (writeops == max_writeops)
continue; /* erase block is already finalized/closed */
fs.eb_usage[eb_id].e_writeops = put_be16(max_writeops);
if (!summary_required(fs, eb_type))
continue;
summary* eb_summary = summary_get(*fs.summary_cache, eb_type);
summary_write(fs, eb_summary, eb_id);
summary_close(*fs.summary_cache, eb_summary);
/* tell gcinfo an erase block of a specific type was written */
unsigned int write_time = gcinfo_update_writetime(fs, eb_type);
fs.eb_usage[eb_id].e_lastwrite = put_be16(write_time);
}
}
static double point_obs_measure( const point_obs_type * point_obs , const void * state , int iobs , node_id_type node_id) {
if (point_obs->source_type == SOURCE_FIELD) {
const field_type * field = field_safe_cast_const( state );
return field_iget_double(field , point_obs->active_index);
} else if (point_obs->source_type == SOURCE_SUMMARY) {
const container_type * container = container_safe_cast_const( state );
const summary_type * summary = summary_safe_cast_const( container_iget_node( container , iobs ));
return summary_get( summary , node_id.report_step , node_id.state );
} else {
util_abort("%s: unknown source type: %d \n",__func__, point_obs->source_type );
return -1;
}
}
void commit_write_operation(fs_context& fs, eraseblock_type eb_type,
eb_id_t eb_id, be32_t ino_no)
{
/* TODO: Error handling missing! */
// This function cannot trigger garbage collection by itself because
// calling functions may have to perform further operations to bring
// the file system into a consistent state. One (and currently the
// only) example is:
// This function does not know whether a cluster was just written
// that replaces (invalidates) a cluster in the same or another
// erase block. In this case the calling function has to decrement
// the old erase blocks valid cluster count.
// To help triggering gc the function will increment fs.eb_written
// every time an erase block was finalized.
if (eb_type == eraseblock_type::ebin)
{
// Erase block indirect data is easy to handle.
// It can never be "open" because it is always completely
// written by a single write operation.
fs.eb_usage[eb_id].e_type = eb_type;
return;
}
/* tell gcinfo that we wrote an erase block of a specific type */
unsigned int write_time = gcinfo_update_writetime(fs, eb_type);
// Update the meta data of the erase block that was written to.
fs.eb_usage[eb_id].e_type = eb_type;
fs.eb_usage[eb_id].e_lastwrite = put_be16(write_time);
eb_inc_cvalid(fs, eb_id);
inc_be16(fs.eb_usage[eb_id].e_writeops);
int max_writeops = fs.erasesize / fs.clustersize;
uint16_t writeops = get_be16(fs.eb_usage[eb_id].e_writeops);
if (!summary_required(fs, eb_type))
{
if (writeops == max_writeops)
{
// An erase block without summary is implicitly
// finalized when its maximum write operations count
// is reached.
gcinfo_inc_writecnt(fs, eb_type);
}
return;
}
// The erase block still needs a summary if it was just opened.
summary* eb_summary;
if (writeops == 1)
{
// Create a new erase block summary buffer for the newly
// opened erase block and add it to the summary list.
eb_summary = summary_open(*fs.summary_cache, eb_type);
}
else
{
// The summary for this erase block should already exist.
eb_summary = summary_get(*fs.summary_cache, eb_type);
}
// The last cluster of a cluster indirect erase block contains the
// inode ids of all inodes that have data inside this erase block.
summary_add_ref(eb_summary, writeops - 1, get_be32(ino_no));
// The summary information of every open erase block is cached.
// It will be written to the end of the erase block when this is full.
if (writeops == (max_writeops - 1))
{
// The last write operation filled the erase block.
// Write its summary to finalize it.
summary_write(fs, eb_summary, eb_id);
summary_close(*fs.summary_cache, eb_summary);
/* we just performed another write operation;
* tell gcinfo and update the erase block's usage data */
write_time = gcinfo_update_writetime(fs, eb_type);
fs.eb_usage[eb_id].e_lastwrite = put_be16(write_time);
inc_be16(fs.eb_usage[eb_id].e_writeops);
gcinfo_inc_writecnt(fs, eb_type);
}
}