Hi Neil,
please find below a small patch which should suspend the
array while reading the stripes in order to perform the
check of the RAID-6.
This should complete the "check" part of the SW.
Please let me know what else could be needed (docs,
test or else).
Please have a careful look at it, since I did not know
how to test it.
Thanks.
--- cut here ---
diff -uNr a/raid6check.c b/raid6check.c
--- a/raid6check.c 2011-05-07 20:35:18.693370007 +0200
+++ b/raid6check.c 2011-05-07 21:00:07.713865939 +0200
@@ -24,6 +24,7 @@
#include "mdadm.h"
#include <stdint.h>
+#include <signal.h>
int geo_map(int block, unsigned long long stripe, int raid_disks,
int level, int layout);
@@ -99,7 +100,7 @@
return curr_broken_disk;
}
-int check_stripes(int *source, unsigned long long *offsets,
+int check_stripes(struct mdinfo *info, int *source, unsigned long long *offsets,
int raid_disks, int chunk_size, int level, int layout,
unsigned long long start, unsigned long long length, char *name[])
{
@@ -139,10 +140,22 @@
printf("pos --> %llu\n", start);
+ signal(SIGTERM, SIG_IGN);
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+ sysfs_set_num(info, NULL, "suspend_lo", start * data_disks);
+ sysfs_set_num(info, NULL, "suspend_hi", (start + chunk_size) * data_disks);
for (i = 0 ; i < raid_disks ; i++) {
lseek64(source[i], offsets[i] + start * chunk_size, 0);
read(source[i], stripes[i], chunk_size);
}
+ sysfs_set_num(info, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL);
+ sysfs_set_num(info, NULL, "suspend_hi", 0);
+ sysfs_set_num(info, NULL, "suspend_lo", 0);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+
for (i = 0 ; i < data_disks ; i++) {
int disk = geo_map(i, start, raid_disks, level, layout);
blocks[i] = stripes[disk];
@@ -343,7 +356,7 @@
comp = comp->next;
}
- int rv = check_stripes(fds, offsets,
+ int rv = check_stripes(info, fds, offsets,
raid_disks, chunk_size, level, layout,
start, length, disk_name);
if (rv != 0) {
--- cut here ---
bye,
--
piergiorgio
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