>From 9e4b23ace5be747c4398e66e87696a295617babd Mon Sep 17 00:00:00 2001
From: Adam Kwolek <adam.kwolek@xxxxxxxxx>
Date: Thu, 18 Feb 2010 11:09:15 +0100
Subject: [PATCH] OLCE: Add OLCE Limitations
Changes to be committed:
modified: Grow.c
OLCE can be used for Raid5 and Raid0 only
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
Grow.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 109 insertions(+), 0 deletions(-)
diff --git a/Grow.c b/Grow.c
index e568c37..9b82b6f 100644
--- a/Grow.c
+++ b/Grow.c
@@ -42,6 +42,105 @@
***********************************************************/
#define OLCE_ADDITIONAL_SPACE 10
+int OLCE_AllowProceed(int fd)
+{
+ int retVal = 0;
+ struct supertype *st = NULL;
+ struct mdinfo *sra = NULL;
+ int container_fd = -1;
+ int dn = -1;
+ struct mdinfo *retInfo = NULL;
+ struct mdinfo *info = NULL;
+ char buf[1024];
+
+ if (fd > -1) {
+ st = super_by_fd(fd);
+ if (st != NULL) {
+ if (st->ss->external) {
+ sra =sysfs_read(fd, 0, GET_VERSION);
+ if (sra) {
+ dn = devname2devnum(sra->text_version + 1);
+ sysfs_free(sra);
+ sra = NULL;
+ container_fd = open_dev_excl(dn);
+ if (container_fd > -1) {
+ sra = sysfs_read(container_fd, 0, GET_VERSION);
+ if (sra) {
+ if ((sra->array.major_version == -1) &&
+ (strncmp(sra->text_version, "imsm", 4) == 0)) {
+ /* Check OLCE IMSM limitation */
+ dprintf("OLCE: IMSM external meta detected\n");
+
+ st->ss->load_super(st, container_fd, NULL);
+ retInfo = st->ss->container_content(st);
+ if (retInfo) {
+ retVal = 1;
+ for (info = retInfo ; info; info = info->next) {
+
+ if ((info->array.level !=0) &&
+ (info->array.level !=5)) {
+ /* we cannot use this container
+ * other reid level
+ */
+ retVal = 0;
+ break;
+ } else {
+ /* all raid5 and raid0 volumes in container
+ * has to be ready for OLCE
+ */
+ int result;
+ int minor;
+
+ result = find_array_minor(info->text_version, st->ss->external ,&minor);
+
+ if (result > -1) {
+ sprintf(info->sys_name,"md%i", minor);;
+
+ if (sysfs_get_str(info, NULL, "array_state", buf, 20) <= 0) {
+ retVal = 0;
+ break;
+ }
+ if (strcmp(buf, "clean\n") != 0 &&
+ strcmp(buf, "active\n") != 0) {
+ retVal = 0;
+ break;
+ }
+
+ if (info->array.level == 5) {
+ if (sysfs_get_str(info, NULL, "sync_action", buf, 20) <= 0) {
+ retVal = 0;
+ break;
+ }
+ if (strcmp(buf, "idle\n") != 0 &&
+ strcmp(buf, "active\n") != 0 &&
+ strcmp(buf, "frozen\n") != 0) {
+ retVal = 0;
+ break;
+ }
+ }
+ } else {
+ retVal = 0;
+ break;
+ }
+ }
+ }
+ }
+ }
+ sysfs_free(sra);
+ sra = NULL;
+ }
+ close(container_fd);
+ }
+ }
+ }
+ else retVal = 1; /* native meta */
+ st->ss->free_super(st);
+ st = NULL;
+ }
+ }
+ return retVal;
+}
+
int Grow_Add_device(char *devname, int fd, char *newdev)
{
/* Add a device to an active array.
@@ -874,6 +973,16 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
}
}
+ /* ========= check OLCE limitations =========== */
+ /* it have to be check after takeover,
+ for Raid0 it cannot be done ealier
+ */
+ if (OLCE_AllowProceed(fd) == 0) {
+ fprintf(stderr, Name ": %s cannot be reshaped due to OLCE limitations.\n", devname);
+ rv = -1;
+ goto release;
+ }
+
/* ========= set shape (chunk_size / layout / ndisks) ============== */
/* Check if layout change is a no-op */
if (layout_str) switch(array.level) {
--
1.6.0.2
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
