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/*
* Copyright (C) 2020 - Vito Caputo - <vcaputo@pengaru.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdint.h>
#include <iou.h>
#include <thunk.h>
#include "bootid.h"
#include "humane.h"
#include "journals.h"
#include "machid.h"
#include "report-tail-waste.h"
#include "upstream/journal-def.h"
typedef struct tail_waste_t {
unsigned per_state_counts[_STATE_MAX];
uint64_t per_state_bytes[_STATE_MAX];
uint64_t total, total_file_size;
unsigned n_journals;
} tail_waste_t;
THUNK_DEFINE_STATIC(print_tail_waste, journal_t **, journal, Header *, journal_header, ObjectHeader *, tail_object_header, tail_waste_t *, tail_waste)
{
uint64_t sz, tail;
struct stat st;
int r;
humane_t h1, h2;
assert(journal);
assert(journal_header);
assert(tail_object_header);
assert(tail_waste);
r = fstat((*journal)->fd, &st);
if (r < 0)
return r;
sz = st.st_size;
tail = journal_header->tail_object_offset + ALIGN64(tail_object_header->size);
printf("\t%s: %s, size: %s, tail-waste: %s\n",
journal_state_str(journal_header->state),
(*journal)->name,
humane_bytes(&h1, sz),
humane_bytes(&h2, sz - tail));
tail_waste->per_state_bytes[journal_header->state] += sz - tail;
tail_waste->total += sz - tail;
tail_waste->total_file_size += sz;
tail_waste->per_state_counts[journal_header->state]++;
tail_waste->n_journals++;
return 0;
}
THUNK_DEFINE_STATIC(per_journal_tail_waste, iou_t *, iou, journal_t **, journal_iter, tail_waste_t *, tail_waste)
{
struct {
journal_t *journal;
Header header;
ObjectHeader tail_object_header;
} *foo;
thunk_t *closure;
assert(iou);
assert(journal_iter);
closure = THUNK_ALLOC(print_tail_waste, (void **)&foo, sizeof(*foo));
foo->journal = *journal_iter;
return journal_get_header(iou, &foo->journal, &foo->header, THUNK(
journal_get_object_header(iou, &foo->journal, &foo->header.tail_object_offset, &foo->tail_object_header, THUNK_INIT(
print_tail_waste(closure, &foo->journal, &foo->header, &foo->tail_object_header, tail_waste)))));
}
/* print the size of wasted space between each journal's tail object and EOF, and a sum total. */
int jio_report_tail_waste(iou_t *iou, int argc, char *argv[])
{
tail_waste_t tail_waste = {};
char *machid;
journals_t *journals;
journal_t *journal_iter;
humane_t h1, h2;
int r;
r = machid_get(iou, &machid, THUNK(
journals_open(iou, &machid, O_RDONLY, &journals, THUNK(
journals_for_each(&journals, &journal_iter, THUNK(
per_journal_tail_waste(iou, &journal_iter, &tail_waste)))))));
if (r < 0)
return r;
printf("\nPer-journal:\n");
r = iou_run(iou);
if (r < 0)
return r;
printf("\nTotals:\n");
printf("\tTail-waste by state:\n");
for (int i = 0; i < _STATE_MAX; i++) {
printf("\t\t%10s [%u]: %s, %"PRIu64"%% of all tail-waste\n",
journal_state_str(i),
tail_waste.per_state_counts[i],
humane_bytes(&h1, tail_waste.per_state_bytes[i]),
tail_waste.total >= 100 ? tail_waste.per_state_bytes[i] / (tail_waste.total / 100) : 0);
}
printf("\n\tAggregate tail-waste: %s, %"PRIu64"%% of %s spanning %u journal files\n",
humane_bytes(&h1, tail_waste.total),
tail_waste.total_file_size >= 100 ? tail_waste.total / (tail_waste.total_file_size / 100) : 0,
humane_bytes(&h2, tail_waste.total_file_size),
tail_waste.n_journals);
return 0;
}
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