/**
* Work queue wrapper for tdb_file_open() (real file open).
*/
static void
tdb_open_db(struct work_struct *work)
{
TdbWork *tw = (TdbWork *)work;
TDB *db = tw->db;
if (tdb_file_open(db, tw->fsize))
TDB_ERR("Cannot open db\n");
db->hdr = tdb_htrie_init(db->hdr, db->filp->f_inode->i_size, tw->rsize);
if (!db->hdr)
TDB_ERR("Cannot initialize db header\n");
kmem_cache_free(tw_cache, tw);
}
/**
* Open database file and @return its descriptor.
* If the database is already opened, then returns the handler.
*
* The function must not be called from softirq!
*/
TDB *
tdb_open(const char *path, size_t fsize, unsigned int rec_size, int node)
{
TDB *db;
if ((fsize & ~TDB_EXT_MASK) || fsize < TDB_EXT_SZ) {
TDB_ERR("Bad table size: %lu\n", fsize);
return NULL;
}
db = tdb_get_db(path, node);
if (!db)
return NULL;
db->node = node;
if (tdb_file_open(db, fsize)) {
TDB_ERR("Cannot open db\n");
goto err;
}
db->hdr = tdb_htrie_init(db->hdr, db->filp->f_inode->i_size, rec_size);
if (!db->hdr) {
TDB_ERR("Cannot initialize db header\n");
goto err_init;
}
tdb_tbl_enumerate(db);
TDB_LOG("Opened table %s: size=%lu rec_size=%u base=%p\n",
path, fsize, rec_size, db->hdr);
return db;
err_init:
tdb_file_close(db);
err:
tdb_put(db);
return NULL;
}
