#ifndef DBFS_DBFS_H
#define DBFS_DBFS_H
#include <sys/stat.h>
#include <errno.h>
#include <event2/event.h>
#include "ops.h"
#include "../evfuse.h"
#include "../evsql.h"
/*
* Structs and functions shared between all dbfs components
*/
#define SERROR(val) do { (val); goto error; } while(0)
struct dbfs {
struct event_base *ev_base;
const char *db_conninfo;
struct evsql *db;
struct evfuse *ev_fuse;
};
// XXX: not sure how this should work
#define CACHE_TIMEOUT 1.0
// columns used for stat_info
#define DBFS_STAT_COLS " inodes.type, inodes.mode, lo_size(data), count(*) "
#define DBFS_STAT_COLS_NOAGGREGATE " inodes.type, inodes.mode, lo_size(data), NULL "
/*
* Convert the CHAR(4) inodes.type from SQL into a mode_t.
*
* Returns zero for unknown types.
*/
mode_t _dbfs_mode (const char *type);
/*
* Check that the number of rows and columns in the result set matches what we expect.
*
* If rows is nonzero, there must be exactly that many rows (mostly useful for rows=1).
* The number of columns must always be given, and match.
*
* Returns;
* -1 if the query failed, the columns/rows do not match
* 0 the results match
* 1 there were no results (zero rows)
*/
int _dbfs_check_res (const struct evsql_result_info *res, size_t rows, size_t cols);
/*
* Fill a `struct state` with info retrieved from a SQL query.
*
* The result must contain four columns, starting at the given offset:
* inodes.type, inodes.mode, inodes.size, count(*) AS nlink
*
* Note that this does not fill the st_ino field
*/
int _dbfs_stat_info (struct stat *st, const struct evsql_result_info *res, size_t row, size_t col_offset);
#endif /* DBFS_DBFS_H */