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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 <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <iou.h>
#include <thunk.h>
#include "bootid.h"
#include "humane.h"
#include "journals.h"
#include "machid.h"
#include "reclaim-tail-waste.h"
#include "upstream/journal-def.h"
typedef struct tail_waste_t {
unsigned n_journals, n_reclaimed, n_ignored, n_errored, n_mules;
uint64_t reclaimed_bytes, ignored_bytes, errored_bytes;
} tail_waste_t;
THUNK_DEFINE_STATIC(reclaim_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;
assert(journal);
assert(journal_header);
assert(tail_object_header);
assert(tail_waste);
r = fstat((*journal)->fd, &st);
if (r < 0)
return r;
tail_waste->n_journals++;
sz = st.st_size;
tail = journal_header->tail_object_offset + ALIGN64(tail_object_header->size);
if (sz == tail) {
tail_waste->n_mules++;
return 0;
}
if (journal_header->state != STATE_ARCHIVED) {
printf("Ignoring %s of tail-waste on \"%s\" for not being archived (state=%s)\n",
humane_bytes(&h1, sz - tail),
(*journal)->name,
journal_state_str(journal_header->state));
tail_waste->n_ignored++;
tail_waste->ignored_bytes += sz - tail;
return 0;
}
if (ftruncate((*journal)->fd, tail) < 0) {
fprintf(stderr, "Unable to truncate \"%s\" to %"PRIu64", ignoring: %s\n",
(*journal)->name,
tail,
strerror(errno));
tail_waste->n_errored++;
tail_waste->errored_bytes += sz - tail;
return 0;
}
tail_waste->n_reclaimed++;
tail_waste->reclaimed_bytes += sz - tail;
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(reclaim_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(
reclaim_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_reclaim_tail_waste(iou_t *iou, int argc, char *argv[])
{
char *machid;
journals_t *journals;
journal_t *journal_iter;
tail_waste_t tail_waste = {};
int r;
humane_t h1;
printf("\nTemporarily disabled: https://github.com/systemd/systemd/pull/17876\n");
return -ENOTSUP;
r = machid_get(iou, &machid, THUNK(
journals_open(iou, &machid, O_RDWR, &journals, THUNK(
journals_for_each(&journals, &journal_iter, THUNK(
per_journal_tail_waste(iou, &journal_iter, &tail_waste)))))));
if (r < 0)
return r;
printf("\nReclaiming tail-waste...\n");
r = iou_run(iou);
if (r < 0)
return r;
printf("\nSummary:\n");
if (!tail_waste.n_journals)
printf("\tNo journal files opened!\n");
if (tail_waste.n_mules)
printf("\tSkipped %u journal files free of tail-waste\n",
tail_waste.n_mules);
if (tail_waste.n_ignored)
printf("\tIgnored %u unarchived journal files totalling %s of tail-waste\n",
tail_waste.n_ignored,
humane_bytes(&h1, tail_waste.ignored_bytes));
if (tail_waste.n_reclaimed)
printf("\tReclaimed %s from %u journal files\n",
humane_bytes(&h1, tail_waste.reclaimed_bytes),
tail_waste.n_reclaimed);
if (tail_waste.n_errored)
printf("\tFailed to relcaim %s from %u journal files due to errors\n",
humane_bytes(&h1, tail_waste.errored_bytes),
tail_waste.n_errored);
return 0;
}
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