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[PATCH] dm: create error table

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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>
This commit is contained in:
David Teigland 2006-06-26 00:27:33 -07:00 • committed by Linus Torvalds
parent 17b2f66f2a
commit c2ade42dd3
2 changed files with 44 additions and 0 deletions
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6
include/linux/device-mapper.h
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@ -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 */