/** check if all fields and filters of a requested report and are in
* ACCT_TABLE */
static bool full_acct(const report_field_descr_t *report_desc_array,
unsigned int report_descr_count,
const lmgr_filter_t *p_filter)
{
int i;
for (i = 0; i < report_descr_count; i++) {
if ((report_desc_array[i].report_type != REPORT_COUNT) &&
report_desc_array[i].attr_index != ATTR_INDEX_dircount &&
!is_acct_field(report_desc_array[i].attr_index) &&
!is_acct_pk(report_desc_array[i].attr_index))
return false;
}
if (!no_filter(p_filter)) {
if (p_filter->filter_type == FILTER_SIMPLE) {
for (i = 0; i < p_filter->filter_simple.filter_count; i++) {
if (!is_acct_pk(p_filter->filter_simple.filter_index[i]) &&
!is_acct_field(p_filter->filter_simple.filter_index[i]))
return false;
}
}
}
return true;
}
int main(void)
{
init_devices();
lcd_set_4bit();
lcd_init();
color_sensor_scaling();
while(1)
{
red_read(); //display the pulse count when red filter is selected
_delay_ms(500);
green_read(); //display the pulse count when green filter is selected
_delay_ms(500);
blue_read(); //display the pulse count when blue filter is selected
_delay_ms(500);
no_filter();//display the pulse count when no filter is selected
_delay_ms(500);
}
}
/**
* Builds a report from database.
*/
struct lmgr_report_t *ListMgr_Report(lmgr_t *p_mgr,
const report_field_descr_t *
report_desc_array,
unsigned int report_descr_count,
const profile_field_descr_t *
profile_descr,
const lmgr_filter_t *p_filter,
const lmgr_iter_opt_t *p_opt)
{
unsigned int i;
char attrname[128];
lmgr_report_t *p_report;
int rc;
table_enum query_tab;
/* supported report fields: ENTRIES, ANNEX_INFO or ACCT */
bool use_acct_table = false;
lmgr_iter_opt_t opt = { 0 };
unsigned int profile_len = 0;
unsigned int ratio = 0;
struct field_count fcnt = { 0 };
GString *req = NULL;
GString *fields = NULL;
GString *where = NULL;
GString *having = NULL;
GString *group_by = NULL;
GString *order_by = NULL;
GString *filter_name = NULL;
/* check profile argument and increase output array if needed */
if (profile_descr != NULL) {
if (profile_descr->attr_index != ATTR_INDEX_size) {
DisplayLog(LVL_CRIT, LISTMGR_TAG,
"Profile on attribute '%s' (index=%u) is not supported",
field_name(profile_descr->attr_index),
profile_descr->attr_index);
return NULL;
}
profile_len = SZ_PROFIL_COUNT;
if (profile_descr->range_ratio_len > 0)
ratio = 1;
}
/* allocate a new report structure */
p_report = (lmgr_report_t *) MemAlloc(sizeof(lmgr_report_t));
if (!p_report)
return NULL;
p_report->p_mgr = p_mgr;
p_report->result = (struct result *)MemCalloc(report_descr_count
+ profile_len + ratio,
sizeof(struct result));
if (!p_report->result)
goto free_report;
p_report->result_count = report_descr_count + profile_len + ratio;
p_report->profile_count = profile_len;
p_report->ratio_count = ratio;
if (profile_descr != NULL)
p_report->profile_attr = ATTR_INDEX_size;
/* initially, no char * tab allocated */
p_report->str_tab = NULL;
if (p_opt)
opt = *p_opt;
fields = g_string_new(NULL);
group_by = g_string_new(NULL);
order_by = g_string_new(NULL);
having = g_string_new(NULL);
where = g_string_new(NULL);
if (full_acct(report_desc_array, report_descr_count, p_filter)
&& !opt.force_no_acct) {
listmgr_optimizedstat(p_report, p_mgr, report_descr_count,
report_desc_array, profile_descr, fields,
group_by, order_by, having, where);
use_acct_table = true;
} else { /* not only ACCT table */
/* sorting by ratio first */
if (profile_descr && profile_descr->range_ratio_len > 0) {
if (profile_descr->attr_index == ATTR_INDEX_size) {
coma_if_needed(order_by);
if (profile_descr->range_ratio_sort == SORT_ASC)
g_string_append(order_by, "sizeratio ASC");
else
g_string_append(order_by, "sizeratio DESC");
}
}
for (i = 0; i < report_descr_count; i++) {
/* no field for count or distinct count */
if (report_desc_array[i].report_type != REPORT_COUNT &&
report_desc_array[i].report_type != REPORT_COUNT_DISTINCT) {
/* in what table is this field ? */
if (is_main_field(report_desc_array[i].attr_index))
fcnt.nb_main++;
else if (is_annex_field(report_desc_array[i].attr_index))
fcnt.nb_annex++;
else {
/* Not supported yet */
DisplayLog(LVL_CRIT, LISTMGR_TAG,
"Error: report on attribute '%s' (index=%u) is not supported (report item #%u).",
field_name(report_desc_array[i].attr_index),
report_desc_array[i].attr_index, i);
rc = DB_NOT_SUPPORTED;
goto free_str;
}
}
sprintf(attrname, "attr%u", i);
/* what kind of stat on this field ? */
switch (report_desc_array[i].report_type) {
case REPORT_MIN:
coma_if_needed(fields);
g_string_append_printf(fields, "MIN(%s) as %s",
field_str(report_desc_array[i].
attr_index), attrname);
p_report->result[i].type =
field_type(report_desc_array[i].attr_index);
break;
case REPORT_MAX:
coma_if_needed(fields);
g_string_append_printf(fields, "MAX(%s) as %s",
field_str(report_desc_array[i].
attr_index), attrname);
p_report->result[i].type =
field_type(report_desc_array[i].attr_index);
break;
case REPORT_AVG:
coma_if_needed(fields);
g_string_append_printf(fields, "ROUND(AVG(%s)) as %s",
field_str(report_desc_array[i].
attr_index), attrname);
p_report->result[i].type =
field_type(report_desc_array[i].attr_index);
break;
case REPORT_SUM:
coma_if_needed(fields);
g_string_append_printf(fields, "SUM(%s) as %s",
field_str(report_desc_array[i].
attr_index), attrname);
p_report->result[i].type =
field_type(report_desc_array[i].attr_index);
break;
case REPORT_COUNT:
coma_if_needed(fields);
g_string_append_printf(fields, "COUNT(*) as %s", attrname);
p_report->result[i].type = DB_BIGUINT;
break;
case REPORT_COUNT_DISTINCT:
coma_if_needed(fields);
g_string_append_printf(fields, "COUNT(DISTINCT(%s)) as %s",
field_str(report_desc_array[i].
attr_index), attrname);
p_report->result[i].type = DB_BIGUINT;
break;
case REPORT_GROUP_BY:
coma_if_needed(fields);
g_string_append_printf(fields, "%s as %s",
field_str(report_desc_array[i].
attr_index), attrname);
coma_if_needed(group_by);
g_string_append(group_by, attrname);
p_report->result[i].type =
field_type(report_desc_array[i].attr_index);
break;
}
/* is this field sorted ? */
append_sort_order(order_by, attrname,
report_desc_array[i].sort_flag);
/* is this field filtered ? */
listmgr_fieldfilter(p_report, p_mgr, report_desc_array, attrname,
having, where, i);
p_report->result[i].flags =
field_flag(report_desc_array[i].attr_index);
}
/* generate size profile */
if (profile_descr != NULL) {
if (profile_descr->attr_index == ATTR_INDEX_size) {
coma_if_needed(fields);
g_string_append(fields, "SUM(size=0)");
for (i = 1; i < SZ_PROFIL_COUNT - 1; i++)
g_string_append_printf(fields,
",SUM(" SZRANGE_FUNC "(size)=%u)",
i - 1);
g_string_append_printf(fields,
",SUM(" SZRANGE_FUNC "(size)>=%u)",
SZ_PROFIL_COUNT - 1);
for (i = 0; i < SZ_PROFIL_COUNT; i++)
p_report->result[i + report_descr_count].type = DB_BIGUINT;
if (profile_descr->range_ratio_len > 0) {
/* add ratio field and sort it */
coma_if_needed(fields);
g_string_append_printf(fields, "SUM(size>=%llu",
SZ_MIN_BY_INDEX(profile_descr->
range_ratio_start));
/* is the last range = 1T->inf ? */
if (profile_descr->range_ratio_start +
profile_descr->range_ratio_len >= SZ_PROFIL_COUNT)
g_string_append(fields, ")");
else
g_string_append_printf(fields, " and size<%llu)",
SZ_MIN_BY_INDEX(profile_descr->range_ratio_start
+ profile_descr->range_ratio_len));
g_string_append(fields, "/COUNT(*) as sizeratio");
}
}
}
}
/* process filter */
if (!(no_filter(p_filter))) {
if (full_acct(report_desc_array, report_descr_count, p_filter)
&& !opt.force_no_acct) {
int filter_acct;
/* filter on acct fields only */
filter_acct = filter2str(p_mgr, where, p_filter, T_ACCT,
(!GSTRING_EMPTY(where) ? AOF_LEADING_SEP : 0)
| AOF_PREFIX);
if (filter_acct > 0)
use_acct_table = true;
} else {
/* process NAMES filters apart, as with must then join with
* DISTINCT(id) */
filter_where(p_mgr, p_filter, &fcnt, where,
(!GSTRING_EMPTY(where) ? AOF_LEADING_SEP : 0)
| AOF_SKIP_NAME);
filter_name = g_string_new(NULL);
fcnt.nb_names =
filter2str(p_mgr, filter_name, p_filter, T_DNAMES, 0);
}
}
/* start building the whole request */
req = g_string_new("SELECT ");
g_string_append_printf(req, "%s FROM ", fields->str);
/* FROM clause */
if (use_acct_table) {
g_string_append(req, ACCT_TABLE);
query_tab = T_ACCT;
} else {
bool distinct;
filter_from(p_mgr, &fcnt, req, &query_tab, &distinct, AOF_SKIP_NAME);
if (filter_name != NULL && !GSTRING_EMPTY(filter_name)) {
g_string_append_printf(req, " INNER JOIN (SELECT DISTINCT(id)"
" FROM " DNAMES_TABLE " WHERE %s) N"
" ON %s.id=N.id", filter_name->str,
table2name(query_tab));
/* FIXME: what if NAMES is the query tab? */
}
/* FIXME: do the same for stripe items */
}
/* Build the request */
if (!GSTRING_EMPTY(where))
g_string_append_printf(req, " WHERE %s", where->str);
if (!GSTRING_EMPTY(group_by))
g_string_append_printf(req, " GROUP BY %s", group_by->str);
if (!GSTRING_EMPTY(having))
g_string_append_printf(req, " HAVING %s", having->str);
if (!GSTRING_EMPTY(order_by))
g_string_append_printf(req, " ORDER BY %s", order_by->str);
/* iterator opt */
if (opt.list_count_max > 0)
g_string_append_printf(req, " LIMIT %u", opt.list_count_max);
retry:
/* execute request (expect that ACCT table does not exists) */
if (use_acct_table)
rc = db_exec_sql_quiet(&p_mgr->conn, req->str,
&p_report->select_result);
else
rc = db_exec_sql(&p_mgr->conn, req->str, &p_report->select_result);
if (lmgr_delayed_retry(p_mgr, rc))
goto retry;
/* if the ACCT table does exist, switch to standard mode */
if (use_acct_table && (rc == DB_NOT_EXISTS)) {
lmgr_iter_opt_t new_opt;
if (p_opt != NULL)
new_opt = *p_opt;
else
new_opt.list_count_max = 0;
new_opt.force_no_acct = true;
DisplayLog(LVL_EVENT, LISTMGR_TAG,
"No accounting info: switching to standard query mode");
g_string_free(req, TRUE);
g_string_free(fields, TRUE);
g_string_free(group_by, TRUE);
g_string_free(order_by, TRUE);
g_string_free(having, TRUE);
g_string_free(where, TRUE);
if (filter_name != NULL)
g_string_free(filter_name, TRUE);
return ListMgr_Report(p_mgr, report_desc_array, report_descr_count,
profile_descr, p_filter, &new_opt);
}
free_str:
/* these are always allocated */
g_string_free(fields, TRUE);
g_string_free(group_by, TRUE);
g_string_free(order_by, TRUE);
g_string_free(having, TRUE);
g_string_free(where, TRUE);
/* these may not be allocated */
if (req != NULL)
g_string_free(req, TRUE);
if (filter_name != NULL)
g_string_free(filter_name, TRUE);
if (rc == DB_SUCCESS)
return p_report;
/* error */
MemFree(p_report->result);
free_report:
MemFree(p_report);
return NULL;
} /* ListMgr_Report */
/**
* Get the list of children of a given parent (or list of parents).
* \param parent_list [in] list of parents to get the child of
* \param parent_count [in] number of ids in parent list
* \param attr_mask [in] required attributes for children
* \param child_id_list [out] ptr to array of child ids
* \param child_attr_list [out] ptr to array of child attrs
* \param child_count [out] number of returned children
*/
int ListMgr_GetChild(lmgr_t *p_mgr, const lmgr_filter_t *p_filter,
const wagon_t *parent_list, unsigned int parent_count,
attr_mask_t attr_mask,
wagon_t **child_id_list, attr_set_t **child_attr_list,
unsigned int *child_count)
{
result_handle_t result;
char *path = NULL;
int path_len;
int rc, i;
GString *req = NULL;
GString *fields = NULL;
GString *from = NULL;
GString *where = NULL;
struct field_count field_cnt = {0};
struct field_count filter_cnt = {0};
table_enum query_tab = T_DNAMES;
bool distinct = false;
int retry_status;
/* XXX: querying children from several parent cannot work, since
* we need to get the paths of the children. Or we could do a
* lookup into parent_list to find the right one. In the meantime,
* try not to mess up the code. */
if (unlikely(parent_count != 1))
RBH_BUG("cannot get children for several parent simultaneously");
/* always request for name to build fullpath in wagon */
attr_mask_set_index(&attr_mask, ATTR_INDEX_name);
fields = g_string_new(NULL);
/* append fields for all tables */
if (!attr_mask_is_null(attr_mask))
{
/* retrieve source info for generated fields */
add_source_fields_for_gen(&attr_mask.std);
field_cnt.nb_names = attrmask2fieldlist(fields, attr_mask, T_DNAMES,
DNAMES_TABLE".", "",
AOF_LEADING_SEP);
field_cnt.nb_main = attrmask2fieldlist(fields, attr_mask, T_MAIN,
MAIN_TABLE".", "",
AOF_LEADING_SEP);
field_cnt.nb_annex = attrmask2fieldlist(fields, attr_mask, T_ANNEX,
ANNEX_TABLE".", "",
AOF_LEADING_SEP);
}
else
{
/* no returned attrs */
if (child_attr_list != NULL)
*child_attr_list = NULL;
}
where = g_string_new(NULL);
/* starts with condition on parent */
rc = append_parent_cond(p_mgr, where, parent_list, parent_count, DNAMES_TABLE".");
if (rc != DB_SUCCESS)
goto free_str;
/* check filters on other tables */
if (!no_filter(p_filter))
{
if (unlikely(dir_filter(p_mgr, NULL, p_filter, NULL, NULL) != FILTERDIR_NONE))
{
DisplayLog(LVL_MAJOR, LISTMGR_TAG, "Directory filter not supported in %s()", __func__);
rc = DB_NOT_SUPPORTED;
goto free_str;
}
else if (unlikely(func_filter(p_mgr, NULL, p_filter, T_MAIN, 0)))
{
DisplayLog(LVL_MAJOR, LISTMGR_TAG, "Function filter not supported in %s()", __func__);
rc = DB_NOT_SUPPORTED;
goto free_str;
}
/* There is always a filter on T_DNAMES, which is the parent condition.
* Look for optional filters.
*/
filter_where(p_mgr, p_filter, &filter_cnt, where,
AOF_LEADING_SEP | AOF_SKIP_NAME);
/** @FIXME process other filters on NAMES */
}
from = g_string_new(DNAMES_TABLE);
/* add filter_count + field_count to build the FROM clause.
* Preserve field count which is needed to interpret the result.
*/
filter_cnt.nb_main += field_cnt.nb_main;
filter_cnt.nb_annex += field_cnt.nb_annex;
filter_cnt.nb_names += field_cnt.nb_names;
/* query tab is DNAMES, skip_name=true, is_first_tab=T_DNAMES */
filter_from(p_mgr, &filter_cnt, from, &query_tab, &distinct,
AOF_LEADING_SEP | AOF_SKIP_NAME);
/* request is always on the DNAMES table (which contains [parent_id, id] relationship */
if (distinct)
req = g_string_new("SELECT DISTINCT("DNAMES_TABLE".id) as id");
else
req = g_string_new("SELECT "DNAMES_TABLE".id as id");
/* build the whole request */
g_string_append_printf(req, "%s FROM %s WHERE %s", fields->str, from->str, where->str);
retry:
rc = db_exec_sql(&p_mgr->conn, req->str, &result);
retry_status = lmgr_delayed_retry(p_mgr, rc);
if (retry_status == 1)
goto retry;
else if (retry_status == 2) {
rc = DB_RBH_SIG_SHUTDOWN;
goto free_str;
} else if (rc)
goto free_str;
/* copy result to output structures */
*child_count = db_result_nb_records(&p_mgr->conn, &result);
/* allocate entry_id array */
*child_id_list = MemCalloc(*child_count, sizeof(wagon_t));
if (*child_id_list == NULL)
{
rc = DB_NO_MEMORY;
goto free_str;
}
if (child_attr_list)
{
*child_attr_list = MemCalloc(*child_count, sizeof(attr_set_t));
if (*child_attr_list == NULL)
{
rc = DB_NO_MEMORY;
goto array_free;
}
}
/* Allocate a string long enough to contain the parent path and a
* child name. */
path_len = strlen(parent_list[0].fullname) + RBH_NAME_MAX + 2;
path = malloc(path_len);
if (!path) {
DisplayLog(LVL_MAJOR, LISTMGR_TAG, "Can't alloc enough memory (%d bytes)",
path_len);
rc = DB_NO_MEMORY;
goto array_free;
}
for (i = 0; i < *child_count; i++)
{
char *res[128]; /* 128 fields per record is large enough */
rc = db_next_record(&p_mgr->conn, &result, res, sizeof(res)/sizeof(*res));
if (rc)
goto array_free;
/* copy id to array */
pk2entry_id(p_mgr, res[0], &((*child_id_list)[i].id));
/* copy attributes to array */
if (child_attr_list)
{
unsigned int shift = 1; /* first was NAMES.id */
(*child_attr_list)[i].attr_mask = attr_mask;
/* first id, then dnames attrs, then main attrs, then annex attrs */
if (field_cnt.nb_names > 0)
{
/* shift of 1 for id */
rc = result2attrset(T_DNAMES, res + shift, field_cnt.nb_names, &((*child_attr_list)[i]));
if (rc)
goto array_free;
shift += field_cnt.nb_names;
}
if (field_cnt.nb_main > 0)
{
/* first id, then main attrs, then annex attrs */
/* shift of 1 for id */
rc = result2attrset(T_MAIN, res + shift, field_cnt.nb_main, &((*child_attr_list)[i]));
if (rc)
goto array_free;
shift += field_cnt.nb_main;
}
if (field_cnt.nb_annex > 0)
{
/* shift of main_attrs count */
rc = result2attrset(T_ANNEX, res + shift, field_cnt.nb_annex,
&((*child_attr_list)[i]));
if (rc)
goto array_free;
shift += field_cnt.nb_annex;
}
#ifdef _LUSTRE
if (stripe_fields(attr_mask))
{
if (get_stripe_info(p_mgr, res[0], &ATTR(&(*child_attr_list)[i], stripe_info),
&ATTR(&(*child_attr_list)[i], stripe_items)))
{
ATTR_MASK_UNSET(&(*child_attr_list)[i], stripe_info);
ATTR_MASK_UNSET(&(*child_attr_list)[i], stripe_items);
}
}
#endif
generate_fields(&((*child_attr_list)[i]));
/* Note: path is properly sized already to not overflow. */
snprintf(path, path_len, "%s/%s", parent_list[0].fullname,
(*child_attr_list)[i].attr_values.name);
(*child_id_list)[i].fullname = strdup(path);
}
}
if (path)
free(path);
db_result_free(&p_mgr->conn, &result);
g_string_free(req, TRUE);
g_string_free(fields, TRUE);
g_string_free(from, TRUE);
g_string_free(where, TRUE);
return 0;
array_free:
if (path)
free(path);
if (child_attr_list && *child_attr_list)
{
MemFree(*child_attr_list);
*child_attr_list = NULL;
}
MemFree(*child_id_list);
*child_id_list = NULL;
free_str:
g_string_free(req, TRUE);
g_string_free(fields, TRUE);
g_string_free(from, TRUE);
g_string_free(where, TRUE);
return rc;
}
