PATCH 2/3] move_spare function modified and moved to Manage.c

From 2779f42c919a6870f9cfab6478cc97858d7ad7f8 Mon Sep 17 00:00:00 2001
From: Anna Czarnowska
Date: Tue, 4 Jan 2011 15:22:21 +0100
Subject: [PATCH 2/3] move_spare function modified and moved to Manage.c
Cc: linux-raid@vger.kernel.org, Williams, Dan J , Ciechanowski, Ed

It will also be needed for Incremental.

Signed-off-by: Anna Czarnowska
---
Manage.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
Monitor.c | 51 ++++-----------------------------------------------
mdadm.h | 1 +
3 files changed, 49 insertions(+), 47 deletions(-)

diff --git a/Manage.c b/Manage.c
index 81fa986..6b0853d 100644
--- a/Manage.c
+++ b/Manage.c
@@ -1096,4 +1096,48 @@ int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident

return rv;
}
+
+/* Move spare from one array to another
+ * If adding to destination array fails
+ * add back to original array
+ * Returns 1 on success, 0 on failure */
+int move_spare(char *from_devname, char *to_devname, dev_t devid)
+{
+ struct mddev_dev devlist;
+ char devname[20];
+
+ /* try to remove and add */
+ int fd1 = open(to_devname, O_RDONLY);
+ int fd2 = open(from_devname, O_RDONLY);
+
+ if (fd1 < 0 || fd2 < 0) {
+ if (fd1>=0) close(fd1);
+ if (fd2>=0) close(fd2);
+ return 0;
+ }
+
+ devlist.next = NULL;
+ devlist.used = 0;
+ devlist.re_add = 0;
+ devlist.writemostly = 0;
+ devlist.devname = devname;
+ sprintf(devname, "%d:%d", major(devid), minor(devid));
+
+ devlist.disposition = 'r';
+ if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL) == 0) {
+ devlist.disposition = 'a';
+ if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0, NULL) == 0) {
+ /* make sure manager is aware of changes */
+ ping_manager(to_devname);
+ ping_manager(from_devname);
+ close(fd1);
+ close(fd2);
+ return 1;
+ }
+ else Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL);
+ }
+ close(fd1);
+ close(fd2);
+ return 0;
+}
#endif
diff --git a/Monitor.c b/Monitor.c
index 428c227..8f28382 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -722,51 +722,6 @@ unsigned long long min_spare_size_required(struct state *st)
return rv;
}

-static int move_spare(struct state *from, struct state *to,
- dev_t devid,
- struct alert_info *info)
-{
- struct mddev_dev devlist;
- char devname[20];
-
- /* try to remove and add */
- int fd1 = open(to->devname, O_RDONLY);
- int fd2 = open(from->devname, O_RDONLY);
-
- if (fd1 < 0 || fd2 < 0) {
- if (fd1>=0) close(fd1);
- if (fd2>=0) close(fd2);
- return 0;
- }
-
- devlist.next = NULL;
- devlist.used = 0;
- devlist.re_add = 0;
- devlist.writemostly = 0;
- devlist.devname = devname;
- sprintf(devname, "%d:%d", major(devid), minor(devid));
-
- devlist.disposition = 'r';
- if (Manage_subdevs(from->devname, fd2, &devlist, -1, 0, NULL) == 0) {
- devlist.disposition = 'a';
- if (Manage_subdevs(to->devname, fd1, &devlist, -1, 0, NULL) == 0) {
- alert("MoveSpare", to->devname, from->devname, info);
- /* make sure we will see newly added spare before next
- * time through loop
- */
- ping_manager(to->devname);
- ping_manager(from->devname);
- close(fd1);
- close(fd2);
- return 1;
- }
- else Manage_subdevs(from->devname, fd2, &devlist, -1, 0, NULL);
- }
- close(fd1);
- close(fd2);
- return 0;
-}
-
static int check_donor(struct state *from, struct state *to)
{
struct state *sub;
@@ -912,8 +867,10 @@ static void try_spare_migration(struct state *statelist, struct alert_info *info
devid = choose_spare(from, to, domlist,
min_size);
if (devid > 0
- && move_spare(from, to, devid, info))
- break;
+ && move_spare(from->devname, to->devname, devid)) {
+ alert("MoveSpare", to->devname, from->devname, info);
+ break;
+ }
}
domain_free(domlist);
}
diff --git a/mdadm.h b/mdadm.h
index dd5c901..925f997 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1100,6 +1100,7 @@ extern struct mdinfo *container_chose_spares(struct supertype *st,
struct domainlist *domlist,
char *spare_group,
const char *metadata, int get_one);
+extern int move_spare(char *from_devname, char *to_devname, dev_t devid);
extern int add_disk(int mdfd, struct supertype *st,
struct mdinfo *sra, struct mdinfo *info);
extern int remove_disk(int mdfd, struct supertype *st,
--
1.7.1

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