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tunedasd: add copy_pair swap capability

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Add an option to tunedasd to trigger a copy pair swap using the appropriate
ioctl for DASD devices.

      -s, --copy-pair-swap COPY_PAIR

This command requires a comma separated pair of primary,secondary to be
specified. In case of success the old secondary will become the new primary
device and the old primary will become a secondary device.

Example:

tunedasd /dev/dasda -s 0.0.9700,0.0.9740

This will set the old secondary device 0.0.9740 as the new primary.
The old primary device 0.0.9700 will automatically become a secondary
device.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Stefan Haberland
2022-11-11 13:17:32 +01:00
committed by Jan Höppner
parent 3aa7f6e298
commit 3f12bdf4c7
6 changed files with 138 additions and 26 deletions
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tunedasd/src/disk.c
+48 -2
View File
@@ -21,12 +21,11 @@
#include "lib/dasd_base.h"
#include "lib/dasd_sys.h"
#include "lib/util_libc.h"
#include "disk.h"
#include "tunedasd.h"
#define BUS_ID_SIZE 30
/* id definition for profile items */
enum prof_id {
prof_reqs = 0,
@@ -549,3 +548,50 @@ int disk_reset_chpid(char *device, char *chpid)
return -1;
}
int disk_copy_swap(char *device, char *copy_pair)
{
struct dasd_copypair_swap_data data = { 0 };
char *primary, *secondary;
int rc = 0;
primary = strtok(copy_pair, ",");
secondary = strtok(NULL, ",");
if (!primary || !secondary) {
error_print("%s: Error parsing Copy Pair %s", device, copy_pair);
return -1;
}
util_strlcpy(data.primary, primary, DASD_BUS_ID_SIZE);
util_strlcpy(data.secondary, secondary, DASD_BUS_ID_SIZE);
printf("Swapping copy pair %s %s on device <%s>...\n", primary, secondary, device);
rc = dasd_copy_swap(device, &data);
switch (rc) {
case 0:
printf("Done.\n");
return 0;
case 1:
error_print("Swap data invalid");
break;
case 2:
error_print("No active device found");
break;
case 3:
error_print("Wrong primary device specified");
break;
case 4:
error_print("Secondary device not found");
break;
case 5:
error_print("Swap already running");
break;
default:
error_print("Swap not successful rc %d", rc);
break;
}
return -1;
}