The patch titled
device-mapper snapshots: Handle origin extension
has been added to the -mm tree. Its filename is
device-mapper-snapshots-handle-origin-extension.patch
Patches currently in -mm which might be from [EMAIL PROTECTED] are
device-mapper-multipath-barriers-not-supported.patch
device-mapper-multipath-flush-workqueue-when-destroying.patch
device-mapper-multipath-avoid-possible-suspension-deadlock.patch
device-mapper-multipath-fix-pg-initialisation-races.patch
device-mapper-fix-dm_swap_table-error-cases.patch
device-mapper-snapshots-handle-origin-extension.patch
From: Alasdair G Kergon <[EMAIL PROTECTED]>
Handle writes to a snapshot-origin device that has been extended since the
snapshot was taken.
Signed-off-by: Alasdair G Kergon <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/md/dm-snap.c | 4 ++++
drivers/md/dm-table.c | 1 +
2 files changed, 5 insertions(+)
diff -puN drivers/md/dm-snap.c~device-mapper-snapshots-handle-origin-extension
drivers/md/dm-snap.c
--- 25/drivers/md/dm-snap.c~device-mapper-snapshots-handle-origin-extension
Fri Jul 8 16:45:36 2005
+++ 25-akpm/drivers/md/dm-snap.c Fri Jul 8 16:45:36 2005
@@ -931,6 +931,10 @@ static int __origin_write(struct list_he
if (!snap->valid)
continue;
+ /* Nothing to do if writing beyond end of snapshot */
+ if (bio->bi_sector >= dm_table_get_size(snap->table))
+ continue;
+
down_write(&snap->lock);
/*
diff -puN drivers/md/dm-table.c~device-mapper-snapshots-handle-origin-extension
drivers/md/dm-table.c
--- 25/drivers/md/dm-table.c~device-mapper-snapshots-handle-origin-extension
Fri Jul 8 16:45:36 2005
+++ 25-akpm/drivers/md/dm-table.c Fri Jul 8 16:45:36 2005
@@ -943,6 +943,7 @@ EXPORT_SYMBOL(dm_vcalloc);
EXPORT_SYMBOL(dm_get_device);
EXPORT_SYMBOL(dm_put_device);
EXPORT_SYMBOL(dm_table_event);
+EXPORT_SYMBOL(dm_table_get_size);
EXPORT_SYMBOL(dm_table_get_mode);
EXPORT_SYMBOL(dm_table_put);
EXPORT_SYMBOL(dm_table_get);
_
-
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