After takeover, layout has no meaning for computing geo map for raid0 and raid4. Set layout to 0 for such cases. It can happen after takeover operation when not all array information is reread. Signed-off-by: Adam Kwolek <adam.kwolek@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
830 lines
21 KiB
C
830 lines
21 KiB
C
/*
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* mdadm - manage Linux "md" devices aka RAID arrays.
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*
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* Copyright (C) 2006-2009 Neil Brown <neilb@suse.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Neil Brown
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* Email: <neilb@suse.de>
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*/
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#include "mdadm.h"
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#include <stdint.h>
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/* To restripe, we read from old geometry to a buffer, and
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* read from buffer to new geometry.
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* When reading, we might have missing devices and so could need
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* to reconstruct.
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* When writing, we need to create correct parity and Q.
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*
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*/
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static int geo_map(int block, unsigned long long stripe, int raid_disks,
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int level, int layout)
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{
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/* On the given stripe, find which disk in the array will have
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* block numbered 'block'.
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* '-1' means the parity block.
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* '-2' means the Q syndrome.
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*/
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int pd;
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/* layout is not relevant for raid0 and raid4 */
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if ((level == 0) ||
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(level == 4))
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layout = 0;
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switch(level*100 + layout) {
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case 000:
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case 400:
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case 500 + ALGORITHM_PARITY_N:
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/* raid 4 isn't messed around by parity blocks */
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if (block == -1)
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return raid_disks-1; /* parity block */
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return block;
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case 500 + ALGORITHM_LEFT_ASYMMETRIC:
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pd = (raid_disks-1) - stripe % raid_disks;
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if (block == -1) return pd;
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if (block >= pd)
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block++;
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return block;
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case 500 + ALGORITHM_RIGHT_ASYMMETRIC:
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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if (block >= pd)
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block++;
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return block;
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case 500 + ALGORITHM_LEFT_SYMMETRIC:
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pd = (raid_disks - 1) - stripe % raid_disks;
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if (block == -1) return pd;
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return (pd + 1 + block) % raid_disks;
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case 500 + ALGORITHM_RIGHT_SYMMETRIC:
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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return (pd + 1 + block) % raid_disks;
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case 500 + ALGORITHM_PARITY_0:
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return block + 1;
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case 600 + ALGORITHM_PARITY_N_6:
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if (block == -2)
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return raid_disks - 1;
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if (block == -1)
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return raid_disks - 2; /* parity block */
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return block;
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case 600 + ALGORITHM_LEFT_ASYMMETRIC_6:
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if (block == -2)
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return raid_disks - 1;
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raid_disks--;
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pd = (raid_disks-1) - stripe % raid_disks;
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if (block == -1) return pd;
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if (block >= pd)
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block++;
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return block;
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case 600 + ALGORITHM_RIGHT_ASYMMETRIC_6:
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if (block == -2)
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return raid_disks - 1;
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raid_disks--;
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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if (block >= pd)
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block++;
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return block;
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case 600 + ALGORITHM_LEFT_SYMMETRIC_6:
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if (block == -2)
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return raid_disks - 1;
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raid_disks--;
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pd = (raid_disks - 1) - stripe % raid_disks;
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if (block == -1) return pd;
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return (pd + 1 + block) % raid_disks;
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case 600 + ALGORITHM_RIGHT_SYMMETRIC_6:
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if (block == -2)
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return raid_disks - 1;
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raid_disks--;
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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return (pd + 1 + block) % raid_disks;
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case 600 + ALGORITHM_PARITY_0_6:
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if (block == -2)
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return raid_disks - 1;
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return block + 1;
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case 600 + ALGORITHM_PARITY_0:
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if (block == -1)
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return 0;
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if (block == -2)
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return 1;
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return block + 2;
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case 600 + ALGORITHM_LEFT_ASYMMETRIC:
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pd = raid_disks - 1 - (stripe % raid_disks);
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if (block == -1) return pd;
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if (block == -2) return (pd+1) % raid_disks;
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if (pd == raid_disks - 1)
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return block+1;
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if (block >= pd)
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return block+2;
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return block;
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case 600 + ALGORITHM_ROTATING_ZERO_RESTART:
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/* Different order for calculating Q, otherwize same as ... */
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case 600 + ALGORITHM_RIGHT_ASYMMETRIC:
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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if (block == -2) return (pd+1) % raid_disks;
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if (pd == raid_disks - 1)
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return block+1;
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if (block >= pd)
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return block+2;
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return block;
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case 600 + ALGORITHM_LEFT_SYMMETRIC:
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pd = raid_disks - 1 - (stripe % raid_disks);
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if (block == -1) return pd;
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if (block == -2) return (pd+1) % raid_disks;
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return (pd + 2 + block) % raid_disks;
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case 600 + ALGORITHM_RIGHT_SYMMETRIC:
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pd = stripe % raid_disks;
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if (block == -1) return pd;
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if (block == -2) return (pd+1) % raid_disks;
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return (pd + 2 + block) % raid_disks;
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case 600 + ALGORITHM_ROTATING_N_RESTART:
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/* Same a left_asymmetric, by first stripe is
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* D D D P Q rather than
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* Q D D D P
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*/
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pd = raid_disks - 1 - ((stripe + 1) % raid_disks);
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if (block == -1) return pd;
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if (block == -2) return (pd+1) % raid_disks;
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if (pd == raid_disks - 1)
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return block+1;
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if (block >= pd)
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return block+2;
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return block;
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case 600 + ALGORITHM_ROTATING_N_CONTINUE:
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/* Same as left_symmetric but Q is before P */
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pd = raid_disks - 1 - (stripe % raid_disks);
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if (block == -1) return pd;
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if (block == -2) return (pd+raid_disks-1) % raid_disks;
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return (pd + 1 + block) % raid_disks;
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}
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return -1;
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}
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static int is_ddf(int layout)
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{
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switch (layout)
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{
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default:
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return 0;
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case ALGORITHM_ROTATING_N_CONTINUE:
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case ALGORITHM_ROTATING_N_RESTART:
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case ALGORITHM_ROTATING_ZERO_RESTART:
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return 1;
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}
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}
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static void xor_blocks(char *target, char **sources, int disks, int size)
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{
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int i, j;
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/* Amazingly inefficient... */
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for (i=0; i<size; i++) {
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char c = 0;
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for (j=0 ; j<disks; j++)
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c ^= sources[j][i];
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target[i] = c;
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}
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}
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static void qsyndrome(uint8_t *p, uint8_t *q, uint8_t **sources, int disks, int size)
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{
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int d, z;
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uint8_t wq0, wp0, wd0, w10, w20;
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for ( d = 0; d < size; d++) {
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wq0 = wp0 = sources[disks-1][d];
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for ( z = disks-2 ; z >= 0 ; z-- ) {
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wd0 = sources[z][d];
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wp0 ^= wd0;
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w20 = (wq0&0x80) ? 0xff : 0x00;
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w10 = (wq0 << 1) & 0xff;
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w20 &= 0x1d;
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w10 ^= w20;
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wq0 = w10 ^ wd0;
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}
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p[d] = wp0;
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q[d] = wq0;
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}
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}
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/*
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* The following was taken from linux/drivers/md/mktables.c, and modified
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* to create in-memory tables rather than C code
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*/
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static uint8_t gfmul(uint8_t a, uint8_t b)
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{
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uint8_t v = 0;
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while (b) {
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if (b & 1)
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v ^= a;
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a = (a << 1) ^ (a & 0x80 ? 0x1d : 0);
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b >>= 1;
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}
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return v;
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}
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static uint8_t gfpow(uint8_t a, int b)
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{
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uint8_t v = 1;
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b %= 255;
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if (b < 0)
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b += 255;
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while (b) {
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if (b & 1)
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v = gfmul(v, a);
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a = gfmul(a, a);
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b >>= 1;
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}
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return v;
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}
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int tables_ready = 0;
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uint8_t raid6_gfmul[256][256];
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uint8_t raid6_gfexp[256];
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uint8_t raid6_gfinv[256];
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uint8_t raid6_gfexi[256];
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void make_tables(void)
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{
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int i, j;
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uint8_t v;
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/* Compute multiplication table */
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for (i = 0; i < 256; i++)
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for (j = 0; j < 256; j++)
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raid6_gfmul[i][j] = gfmul(i, j);
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/* Compute power-of-2 table (exponent) */
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v = 1;
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for (i = 0; i < 256; i++) {
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raid6_gfexp[i] = v;
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v = gfmul(v, 2);
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if (v == 1)
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v = 0; /* For entry 255, not a real entry */
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}
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/* Compute inverse table x^-1 == x^254 */
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for (i = 0; i < 256; i++)
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raid6_gfinv[i] = gfpow(i, 254);
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/* Compute inv(2^x + 1) (exponent-xor-inverse) table */
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for (i = 0; i < 256; i ++)
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raid6_gfexi[i] = raid6_gfinv[raid6_gfexp[i] ^ 1];
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tables_ready = 1;
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}
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uint8_t *zero;
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/* Following was taken from linux/drivers/md/raid6recov.c */
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/* Recover two failed data blocks. */
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void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
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uint8_t **ptrs)
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{
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uint8_t *p, *q, *dp, *dq;
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uint8_t px, qx, db;
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const uint8_t *pbmul; /* P multiplier table for B data */
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const uint8_t *qmul; /* Q multiplier table (for both) */
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p = ptrs[disks-2];
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q = ptrs[disks-1];
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/* Compute syndrome with zero for the missing data pages
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Use the dead data pages as temporary storage for
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delta p and delta q */
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dp = ptrs[faila];
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ptrs[faila] = zero;
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dq = ptrs[failb];
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ptrs[failb] = zero;
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qsyndrome(dp, dq, ptrs, disks-2, bytes);
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/* Restore pointer table */
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ptrs[faila] = dp;
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ptrs[failb] = dq;
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/* Now, pick the proper data tables */
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pbmul = raid6_gfmul[raid6_gfexi[failb-faila]];
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qmul = raid6_gfmul[raid6_gfinv[raid6_gfexp[faila]^raid6_gfexp[failb]]];
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/* Now do it... */
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while ( bytes-- ) {
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px = *p ^ *dp;
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qx = qmul[*q ^ *dq];
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*dq++ = db = pbmul[px] ^ qx; /* Reconstructed B */
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*dp++ = db ^ px; /* Reconstructed A */
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p++; q++;
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}
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}
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/* Recover failure of one data block plus the P block */
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void raid6_datap_recov(int disks, size_t bytes, int faila, uint8_t **ptrs)
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{
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uint8_t *p, *q, *dq;
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const uint8_t *qmul; /* Q multiplier table */
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p = ptrs[disks-2];
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q = ptrs[disks-1];
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/* Compute syndrome with zero for the missing data page
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Use the dead data page as temporary storage for delta q */
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dq = ptrs[faila];
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ptrs[faila] = zero;
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qsyndrome(p, dq, ptrs, disks-2, bytes);
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/* Restore pointer table */
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ptrs[faila] = dq;
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/* Now, pick the proper data tables */
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qmul = raid6_gfmul[raid6_gfinv[raid6_gfexp[faila]]];
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/* Now do it... */
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while ( bytes-- ) {
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*p++ ^= *dq = qmul[*q ^ *dq];
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q++; dq++;
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}
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}
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/* Save data:
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* We are given:
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* A list of 'fds' of the active disks. Some may be absent.
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* A geometry: raid_disks, chunk_size, level, layout
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* A list of 'fds' for mirrored targets. They are already seeked to
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* right (Write) location
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* A start and length which must be stripe-aligned
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* 'buf' is large enough to hold one stripe, and is aligned
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*/
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int save_stripes(int *source, unsigned long long *offsets,
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int raid_disks, int chunk_size, int level, int layout,
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int nwrites, int *dest,
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unsigned long long start, unsigned long long length,
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char *buf)
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{
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int len;
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int data_disks = raid_disks - (level == 0 ? 0 : level <=5 ? 1 : 2);
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int disk;
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int i;
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if (!tables_ready)
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make_tables();
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if (zero == NULL) {
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zero = malloc(chunk_size);
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memset(zero, 0, chunk_size);
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}
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len = data_disks * chunk_size;
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while (length > 0) {
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int failed = 0;
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int fdisk[3], fblock[3];
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for (disk = 0; disk < raid_disks ; disk++) {
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unsigned long long offset;
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int dnum;
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offset = (start/chunk_size/data_disks)*chunk_size;
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dnum = geo_map(disk < data_disks ? disk : data_disks - disk - 1,
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start/chunk_size/data_disks,
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raid_disks, level, layout);
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if (dnum < 0) abort();
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if (source[dnum] < 0 ||
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lseek64(source[dnum], offsets[dnum]+offset, 0) < 0 ||
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read(source[dnum], buf+disk * chunk_size, chunk_size)
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!= chunk_size)
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if (failed <= 2) {
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fdisk[failed] = dnum;
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fblock[failed] = disk;
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failed++;
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}
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}
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if (failed == 0 || fblock[0] >= data_disks)
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/* all data disks are good */
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;
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else if (failed == 1 || fblock[1] >= data_disks+1) {
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/* one failed data disk and good parity */
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char *bufs[data_disks];
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for (i=0; i < data_disks; i++)
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if (fblock[0] == i)
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bufs[i] = buf + data_disks*chunk_size;
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else
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bufs[i] = buf + i*chunk_size;
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xor_blocks(buf + fblock[0]*chunk_size,
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bufs, data_disks, chunk_size);
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} else if (failed > 2 || level != 6)
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/* too much failure */
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return -1;
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else {
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/* RAID6 computations needed. */
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uint8_t *bufs[data_disks+4];
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int qdisk;
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int syndrome_disks;
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disk = geo_map(-1, start/chunk_size/data_disks,
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raid_disks, level, layout);
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qdisk = geo_map(-2, start/chunk_size/data_disks,
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raid_disks, level, layout);
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if (is_ddf(layout)) {
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/* q over 'raid_disks' blocks, in device order.
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* 'p' and 'q' get to be all zero
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*/
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for (i = 0; i < raid_disks; i++)
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bufs[i] = zero;
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for (i = 0; i < data_disks; i++) {
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int dnum = geo_map(i,
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start/chunk_size/data_disks,
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raid_disks, level, layout);
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int snum;
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/* i is the logical block number, so is index to 'buf'.
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* dnum is physical disk number
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* and thus the syndrome number.
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*/
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snum = dnum;
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bufs[snum] = (uint8_t*)buf + chunk_size * i;
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}
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syndrome_disks = raid_disks;
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} else {
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/* for md, q is over 'data_disks' blocks,
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* starting immediately after 'q'
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* Note that for the '_6' variety, the p block
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* makes a hole that we need to be careful of.
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*/
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int j;
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int snum = 0;
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for (j = 0; j < raid_disks; j++) {
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int dnum = (qdisk + 1 + j) % raid_disks;
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if (dnum == disk || dnum == qdisk)
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continue;
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for (i = 0; i < data_disks; i++)
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|
if (geo_map(i,
|
|
start/chunk_size/data_disks,
|
|
raid_disks, level, layout) == dnum)
|
|
break;
|
|
/* i is the logical block number, so is index to 'buf'.
|
|
* dnum is physical disk number
|
|
* snum is syndrome disk for which 0 is immediately after Q
|
|
*/
|
|
bufs[snum] = (uint8_t*)buf + chunk_size * i;
|
|
|
|
if (fblock[0] == i)
|
|
fdisk[0] = snum;
|
|
if (fblock[1] == i)
|
|
fdisk[1] = snum;
|
|
snum++;
|
|
}
|
|
|
|
syndrome_disks = data_disks;
|
|
}
|
|
|
|
/* Place P and Q blocks at end of bufs */
|
|
bufs[syndrome_disks] = (uint8_t*)buf + chunk_size * data_disks;
|
|
bufs[syndrome_disks+1] = (uint8_t*)buf + chunk_size * (data_disks+1);
|
|
|
|
if (fblock[1] == data_disks)
|
|
/* One data failed, and parity failed */
|
|
raid6_datap_recov(syndrome_disks+2, chunk_size,
|
|
fdisk[0], bufs);
|
|
else {
|
|
if (fdisk[0] > fdisk[1]) {
|
|
int t = fdisk[0];
|
|
fdisk[0] = fdisk[1];
|
|
fdisk[1] = t;
|
|
}
|
|
/* Two data blocks failed, P,Q OK */
|
|
raid6_2data_recov(syndrome_disks+2, chunk_size,
|
|
fdisk[0], fdisk[1], bufs);
|
|
}
|
|
}
|
|
|
|
for (i=0; i<nwrites; i++)
|
|
if (write(dest[i], buf, len) != len)
|
|
return -1;
|
|
|
|
length -= len;
|
|
start += len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Restore data:
|
|
* We are given:
|
|
* A list of 'fds' of the active disks. Some may be '-1' for not-available.
|
|
* A geometry: raid_disks, chunk_size, level, layout
|
|
* An 'fd' to read from. It is already seeked to the right (Read) location.
|
|
* A start and length.
|
|
* The length must be a multiple of the stripe size.
|
|
*
|
|
* We build a full stripe in memory and then write it out.
|
|
* We assume that there are enough working devices.
|
|
*/
|
|
int restore_stripes(int *dest, unsigned long long *offsets,
|
|
int raid_disks, int chunk_size, int level, int layout,
|
|
int source, unsigned long long read_offset,
|
|
unsigned long long start, unsigned long long length)
|
|
{
|
|
char *stripe_buf;
|
|
char **stripes = malloc(raid_disks * sizeof(char*));
|
|
char **blocks = malloc(raid_disks * sizeof(char*));
|
|
int i;
|
|
|
|
int data_disks = raid_disks - (level == 0 ? 0 : level <= 5 ? 1 : 2);
|
|
|
|
if (posix_memalign((void**)&stripe_buf, 4096, raid_disks * chunk_size))
|
|
stripe_buf = NULL;
|
|
if (zero == NULL) {
|
|
zero = malloc(chunk_size);
|
|
if (zero)
|
|
memset(zero, 0, chunk_size);
|
|
}
|
|
if (stripe_buf == NULL || stripes == NULL || blocks == NULL
|
|
|| zero == NULL) {
|
|
free(stripe_buf);
|
|
free(stripes);
|
|
free(blocks);
|
|
free(zero);
|
|
return -2;
|
|
}
|
|
for (i=0; i<raid_disks; i++)
|
|
stripes[i] = stripe_buf + i * chunk_size;
|
|
while (length > 0) {
|
|
unsigned int len = data_disks * chunk_size;
|
|
unsigned long long offset;
|
|
int disk, qdisk;
|
|
int syndrome_disks;
|
|
if (length < len)
|
|
return -3;
|
|
for (i=0; i < data_disks; i++) {
|
|
int disk = geo_map(i, start/chunk_size/data_disks,
|
|
raid_disks, level, layout);
|
|
if ((unsigned long long)lseek64(source, read_offset, 0)
|
|
!= read_offset)
|
|
return -1;
|
|
if (read(source, stripes[disk],
|
|
chunk_size) != chunk_size)
|
|
return -1;
|
|
read_offset += chunk_size;
|
|
}
|
|
/* We have the data, now do the parity */
|
|
offset = (start/chunk_size/data_disks) * chunk_size;
|
|
switch (level) {
|
|
case 4:
|
|
case 5:
|
|
disk = geo_map(-1, start/chunk_size/data_disks,
|
|
raid_disks, level, layout);
|
|
for (i = 0; i < data_disks; i++)
|
|
blocks[i] = stripes[(disk+1+i) % raid_disks];
|
|
xor_blocks(stripes[disk], blocks, data_disks, chunk_size);
|
|
break;
|
|
case 6:
|
|
disk = geo_map(-1, start/chunk_size/data_disks,
|
|
raid_disks, level, layout);
|
|
qdisk = geo_map(-2, start/chunk_size/data_disks,
|
|
raid_disks, level, layout);
|
|
if (is_ddf(layout)) {
|
|
/* q over 'raid_disks' blocks, in device order.
|
|
* 'p' and 'q' get to be all zero
|
|
*/
|
|
for (i = 0; i < raid_disks; i++)
|
|
if (i == disk || i == qdisk)
|
|
blocks[i] = (char*)zero;
|
|
else
|
|
blocks[i] = stripes[i];
|
|
syndrome_disks = raid_disks;
|
|
} else {
|
|
/* for md, q is over 'data_disks' blocks,
|
|
* starting immediately after 'q'
|
|
*/
|
|
for (i = 0; i < data_disks; i++)
|
|
blocks[i] = stripes[(qdisk+1+i) % raid_disks];
|
|
|
|
syndrome_disks = data_disks;
|
|
}
|
|
qsyndrome((uint8_t*)stripes[disk],
|
|
(uint8_t*)stripes[qdisk],
|
|
(uint8_t**)blocks,
|
|
syndrome_disks, chunk_size);
|
|
break;
|
|
}
|
|
for (i=0; i < raid_disks ; i++)
|
|
if (dest[i] >= 0) {
|
|
if (lseek64(dest[i], offsets[i]+offset, 0) < 0)
|
|
return -1;
|
|
if (write(dest[i], stripes[i], chunk_size) != chunk_size)
|
|
return -1;
|
|
}
|
|
length -= len;
|
|
start += len;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef MAIN
|
|
|
|
int test_stripes(int *source, unsigned long long *offsets,
|
|
int raid_disks, int chunk_size, int level, int layout,
|
|
unsigned long long start, unsigned long long length)
|
|
{
|
|
/* ready the data and p (and q) blocks, and check we got them right */
|
|
char *stripe_buf = malloc(raid_disks * chunk_size);
|
|
char **stripes = malloc(raid_disks * sizeof(char*));
|
|
char **blocks = malloc(raid_disks * sizeof(char*));
|
|
char *p = malloc(chunk_size);
|
|
char *q = malloc(chunk_size);
|
|
|
|
int i;
|
|
int data_disks = raid_disks - (level == 5 ? 1: 2);
|
|
for ( i = 0 ; i < raid_disks ; i++)
|
|
stripes[i] = stripe_buf + i * chunk_size;
|
|
|
|
while (length > 0) {
|
|
int disk;
|
|
|
|
for (i = 0 ; i < raid_disks ; i++) {
|
|
lseek64(source[i], offsets[i]+start, 0);
|
|
read(source[i], stripes[i], chunk_size);
|
|
}
|
|
for (i = 0 ; i < data_disks ; i++) {
|
|
int disk = geo_map(i, start/chunk_size, raid_disks,
|
|
level, layout);
|
|
blocks[i] = stripes[disk];
|
|
printf("%d->%d\n", i, disk);
|
|
}
|
|
switch(level) {
|
|
case 6:
|
|
qsyndrome(p, q, (uint8_t**)blocks, data_disks, chunk_size);
|
|
disk = geo_map(-1, start/chunk_size, raid_disks,
|
|
level, layout);
|
|
if (memcmp(p, stripes[disk], chunk_size) != 0) {
|
|
printf("P(%d) wrong at %llu\n", disk,
|
|
start / chunk_size);
|
|
}
|
|
disk = geo_map(-2, start/chunk_size, raid_disks,
|
|
level, layout);
|
|
if (memcmp(q, stripes[disk], chunk_size) != 0) {
|
|
printf("Q(%d) wrong at %llu\n", disk,
|
|
start / chunk_size);
|
|
}
|
|
break;
|
|
}
|
|
length -= chunk_size;
|
|
start += chunk_size;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned long long getnum(char *str, char **err)
|
|
{
|
|
char *e;
|
|
unsigned long long rv = strtoull(str, &e, 10);
|
|
if (e==str || *e) {
|
|
*err = str;
|
|
return 0;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
main(int argc, char *argv[])
|
|
{
|
|
/* save/restore file raid_disks chunk_size level layout start length devices...
|
|
*/
|
|
int save;
|
|
int *fds;
|
|
char *file;
|
|
char *buf;
|
|
int storefd;
|
|
unsigned long long *offsets;
|
|
int raid_disks, chunk_size, level, layout;
|
|
unsigned long long start, length;
|
|
int i;
|
|
|
|
char *err = NULL;
|
|
if (argc < 10) {
|
|
fprintf(stderr, "Usage: test_stripe save/restore file raid_disks"
|
|
" chunk_size level layout start length devices...\n");
|
|
exit(1);
|
|
}
|
|
if (strcmp(argv[1], "save")==0)
|
|
save = 1;
|
|
else if (strcmp(argv[1], "restore") == 0)
|
|
save = 0;
|
|
else if (strcmp(argv[1], "test") == 0)
|
|
save = 2;
|
|
else {
|
|
fprintf(stderr, "test_stripe: must give 'save' or 'restore'.\n");
|
|
exit(2);
|
|
}
|
|
|
|
file = argv[2];
|
|
raid_disks = getnum(argv[3], &err);
|
|
chunk_size = getnum(argv[4], &err);
|
|
level = getnum(argv[5], &err);
|
|
layout = getnum(argv[6], &err);
|
|
start = getnum(argv[7], &err);
|
|
length = getnum(argv[8], &err);
|
|
if (err) {
|
|
fprintf(stderr, "test_stripe: Bad number: %s\n", err);
|
|
exit(2);
|
|
}
|
|
if (argc != raid_disks + 9) {
|
|
fprintf(stderr, "test_stripe: wrong number of devices: want %d found %d\n",
|
|
raid_disks, argc-9);
|
|
exit(2);
|
|
}
|
|
fds = malloc(raid_disks * sizeof(*fds));
|
|
offsets = malloc(raid_disks * sizeof(*offsets));
|
|
memset(offsets, 0, raid_disks * sizeof(*offsets));
|
|
|
|
storefd = open(file, O_RDWR);
|
|
if (storefd < 0) {
|
|
perror(file);
|
|
fprintf(stderr, "test_stripe: could not open %s.\n", file);
|
|
exit(3);
|
|
}
|
|
for (i=0; i<raid_disks; i++) {
|
|
fds[i] = open(argv[9+i], O_RDWR);
|
|
if (fds[i] < 0) {
|
|
perror(argv[9+i]);
|
|
fprintf(stderr,"test_stripe: cannot open %s.\n", argv[9+i]);
|
|
exit(3);
|
|
}
|
|
}
|
|
|
|
buf = malloc(raid_disks * chunk_size);
|
|
|
|
if (save == 1) {
|
|
int rv = save_stripes(fds, offsets,
|
|
raid_disks, chunk_size, level, layout,
|
|
1, &storefd,
|
|
start, length, buf);
|
|
if (rv != 0) {
|
|
fprintf(stderr,
|
|
"test_stripe: save_stripes returned %d\n", rv);
|
|
exit(1);
|
|
}
|
|
} else if (save == 2) {
|
|
int rv = test_stripes(fds, offsets,
|
|
raid_disks, chunk_size, level, layout,
|
|
start, length);
|
|
if (rv != 0) {
|
|
fprintf(stderr,
|
|
"test_stripe: test_stripes returned %d\n", rv);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
int rv = restore_stripes(fds, offsets,
|
|
raid_disks, chunk_size, level, layout,
|
|
storefd, 0ULL,
|
|
start, length);
|
|
if (rv != 0) {
|
|
fprintf(stderr,
|
|
"test_stripe: restore_stripes returned %d\n",
|
|
rv);
|
|
exit(1);
|
|
}
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
#endif /* MAIN */
|