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authorDavid Teigland <teigland@redhat.com>2006-06-26 00:27:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:36 -0700
commitc2ade42dd35466d90aa6fc7cc717f396e165492f (patch)
tree245baeabfea43a3b2654adb962e776a877da0059 /include/linux/device-mapper.h
parent17b2f66f2a39a4e4d1ed456f35ee3bb598e41d35 (diff)
downloadop-kernel-dev-c2ade42dd35466d90aa6fc7cc717f396e165492f.zip
op-kernel-dev-c2ade42dd35466d90aa6fc7cc717f396e165492f.tar.gz
[PATCH] dm: create error table
Add a library function dm_create_error_table() to create a table that rejects any I/O sent to a device with EIO. Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/device-mapper.h')
-rw-r--r--include/linux/device-mapper.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 010c8c5..61103d2 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -227,5 +227,11 @@ void dm_table_event(struct dm_table *t);
*/
int dm_swap_table(struct mapped_device *md, struct dm_table *t);
+/*
+ * Prepare a table for a device that will error all I/O.
+ * To make it active, call dm_suspend(), dm_swap_table() then dm_resume().
+ */
+int dm_create_error_table(struct dm_table **result, struct mapped_device *md);
+
#endif /* __KERNEL__ */
#endif /* _LINUX_DEVICE_MAPPER_H */
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