99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2013 Andrea Mazzoleni
|
||
|
|
*
|
||
|
|
* This program is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* 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 "portable.h"
|
||
|
|
|
||
|
|
#include "util.h"
|
||
|
|
#include "elem.h"
|
||
|
|
#include "import.h"
|
||
|
|
#include "state.h"
|
||
|
|
#include "parity.h"
|
||
|
|
#include "handle.h"
|
||
|
|
#include "raid/raid.h"
|
||
|
|
|
||
|
|
/****************************************************************************/
|
||
|
|
/* rehash */
|
||
|
|
|
||
|
|
void state_rehash(struct snapraid_state* state)
|
||
|
|
{
|
||
|
|
block_off_t blockmax;
|
||
|
|
block_off_t i;
|
||
|
|
|
||
|
|
blockmax = parity_allocated_size(state);
|
||
|
|
|
||
|
|
/* check if a rehash is already in progress */
|
||
|
|
if (state->prevhash != HASH_UNDEFINED) {
|
||
|
|
/* LCOV_EXCL_START */
|
||
|
|
log_fatal("You already have a rehash in progress.\n");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
/* LCOV_EXCL_STOP */
|
||
|
|
}
|
||
|
|
|
||
|
|
if (state->hash == state->besthash) {
|
||
|
|
/* LCOV_EXCL_START */
|
||
|
|
log_fatal("You are already using the best hash for your platform.\n");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
/* LCOV_EXCL_STOP */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* copy the present hash as previous one */
|
||
|
|
state->prevhash = state->hash;
|
||
|
|
memcpy(state->prevhashseed, state->hashseed, HASH_MAX);
|
||
|
|
|
||
|
|
/* set the new hash and seed */
|
||
|
|
state->hash = state->besthash;
|
||
|
|
if (randomize(state->hashseed, HASH_MAX) != 0) {
|
||
|
|
/* LCOV_EXCL_START */
|
||
|
|
log_fatal("Failed to get random values.\n");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
/* LCOV_EXCL_STOP */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* mark all the block for rehashing */
|
||
|
|
for (i = 0; i < blockmax; ++i) {
|
||
|
|
snapraid_info info;
|
||
|
|
|
||
|
|
/* if it's unused */
|
||
|
|
info = info_get(&state->infoarr, i);
|
||
|
|
if (info == 0) {
|
||
|
|
/* skip it */
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (info_get_rehash(info)) {
|
||
|
|
/* LCOV_EXCL_START */
|
||
|
|
log_fatal("Internal inconsistency for a rehash already in progress\n");
|
||
|
|
os_abort();
|
||
|
|
/* LCOV_EXCL_STOP */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* enable the rehash */
|
||
|
|
info = info_set_rehash(info);
|
||
|
|
|
||
|
|
/* save it */
|
||
|
|
info_set(&state->infoarr, i, info);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* save the new content file */
|
||
|
|
state->need_write = 1;
|
||
|
|
|
||
|
|
msg_status("A rehash is now scheduled. It will take place progressively in the next\n");
|
||
|
|
msg_status("'sync' and 'scrub' commands. You can check the rehash progress using the\n");
|
||
|
|
msg_status("'status' command.\n");
|
||
|
|
}
|
||
|
|
|