10 void _dbfs_lookup_result (const struct evsql_result_info *res, void *arg) {

    11     struct fuse_req *req = arg;

    12     struct fuse_entry_param e; ZINIT(e);

    13     int err = 0;

    14     

    15     uint32_t ino;

    16     

    17     // check the results

    18     if ((err = _dbfs_check_res(res, 1, 5)))

    19         SERROR(err = (err ==  1 ? ENOENT : EIO));

    20     

    21     // get the data

    22     if (0

    23         ||  evsql_result_uint32(res, 0, 0, &ino,        0 ) // inodes.ino

    24     )

    25         EERROR(err = EIO, "invalid db data");

    26         

    27     INFO("\t[dbfs.lookup] -> ino=%u", ino);

    28     

    29     // stat attrs

    30     if ((err = _dbfs_stat_info(&e.attr, res, 0, 1)))

    31         goto error;

    33     // other attrs

    34     e.ino = e.attr.st_ino = ino;

    35     e.attr_timeout = CACHE_TIMEOUT;

    36     e.entry_timeout = CACHE_TIMEOUT;

    37         

    38     // reply

    39     if ((err = fuse_reply_entry(req, &e)))

    40         EERROR(err, "fuse_reply_entry");

    41 

    42 error:

    43     if (err && (err = fuse_reply_err(req, err)))

    44         EWARNING(err, "fuse_reply_err");

    45 

    46     // free

    47     evsql_result_free(res);

    48 }

    49 

    50 void dbfs_lookup (struct fuse_req *req, fuse_ino_t parent, const char *name) {

    51     struct dbfs *ctx = fuse_req_userdata(req);

    52     int err;

    53 

    54     INFO("[dbfs.lookup] parent=%lu name=%s", parent, name);

    55     

    56     // query and params

    57     const char *sql = 

    58         "SELECT"

    59         " inodes.ino, " DBFS_STAT_COLS

    60         " FROM file_tree INNER JOIN inodes ON (file_tree.ino = inodes.ino)"

    61         " WHERE file_tree.parent = $1::int4 AND file_tree.name = $2::varchar";

    62     

    63     static struct evsql_query_params params = EVSQL_PARAMS(EVSQL_FMT_BINARY) {

    64         EVSQL_PARAM ( UINT32 ),

    65         EVSQL_PARAM ( STRING ),

    66 

    67         EVSQL_PARAMS_END

    68     };

    69     

    70     // build params

    71     if (0

    72         ||  evsql_param_uint32(&params, 0, parent)

    73         ||  evsql_param_string(&params, 1, name)

    74     )

    75         EERROR(err = EIO, "evsql_param_*");

    76 

    77     // query

    78     if (evsql_query_params(ctx->db, NULL, sql, &params, _dbfs_lookup_result, req) == NULL)

    79         EERROR(err = EIO, "evsql_query_params");

    80 

    81     // XXX: handle interrupts

    82     

    83     // wait

    84     return;

    85 

    86 error:

    87     if ((err = fuse_reply_err(req, err)))

    88         EWARNING(err, "fuse_reply_err");

    89 }

    90