1 #ifndef DBFS_COMMON_H

     2 #define DBFS_COMMON_H

     3 

     4 #include <sys/stat.h>

     5 #include <errno.h>

     6 

     7 #include <event2/event.h>

     8 

     9 #include "../evfuse.h"

    10 #include "../evsql.h"

    11 #include "../lib/log.h"

    12 #include "../lib/misc.h"

    13 

    14 /*

    15  * Structs and functions shared between all dbfs components

    16  */

    17 

    18 #define SERROR(val) do { (val); goto error; } while(0)

    19 

    20 struct dbfs {

    21     struct event_base *ev_base;

    22     

    23     const char *db_conninfo;

    24     struct evsql *db;

    25 

    26     struct evfuse *ev_fuse;

    27 };

    28 

    29 // XXX: not sure how this should work

    30 #define CACHE_TIMEOUT 1.0

    31 

    32 /*

    33  * Convert the CHAR(4) inodes.type from SQL into a mode_t.

    34  *

    35  * Returns zero for unknown types.

    36  */

    37 mode_t _dbfs_mode (const char *type);

    38 

    39 /*

    40  * Check that the number of rows and columns in the result set matches what we expect.

    41  *

    42  * If rows is nonzero, there must be exactly that many rows (mostly useful for rows=1).

    43  * The number of columns must always be given, and match.

    44  *

    45  * Returns;

    46  *  -1  if the query failed, the columns/rows do not match

    47  *  0   the results match

    48  *  1   there were no results (zero rows)

    49  */

    50 int _dbfs_check_res (const struct evsql_result_info *res, size_t rows, size_t cols);

    51 

    52 /*

    53  * Fill a `struct state` with info retrieved from a SQL query.

    54  *

    55  * The result must contain four columns, starting at the given offset:

    56  *  inodes.type, inodes.mode, inodes.size, count(*) AS nlink

    57  *

    58  * Note that this does not fill the st_ino field

    59  */

    60 int _dbfs_stat_info (struct stat *st, const struct evsql_result_info *res, size_t row, size_t col_offset);

    61 

    62 #endif /* DBFS_COMMON_H */