diff options
author | David Teigland <teigland@redhat.com> | 2006-06-26 07:27:33 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 16:58:36 (GMT) |
commit | c2ade42dd35466d90aa6fc7cc717f396e165492f (patch) | |
tree | 245baeabfea43a3b2654adb962e776a877da0059 /drivers/md | |
parent | 17b2f66f2a39a4e4d1ed456f35ee3bb598e41d35 (diff) | |
download | linux-fsl-qoriq-c2ade42dd35466d90aa6fc7cc717f396e165492f.tar.xz |
[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 'drivers/md')
-rw-r--r-- | drivers/md/dm-table.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 10c9439..827b648 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -237,6 +237,44 @@ int dm_table_create(struct dm_table **result, int mode, return 0; } +int dm_create_error_table(struct dm_table **result, struct mapped_device *md) +{ + struct dm_table *t; + sector_t dev_size = 1; + int r; + + /* + * Find current size of device. + * Default to 1 sector if inactive. + */ + t = dm_get_table(md); + if (t) { + dev_size = dm_table_get_size(t); + dm_table_put(t); + } + + r = dm_table_create(&t, FMODE_READ, 1, md); + if (r) + return r; + + r = dm_table_add_target(t, "error", 0, dev_size, NULL); + if (r) + goto out; + + r = dm_table_complete(t); + if (r) + goto out; + + *result = t; + +out: + if (r) + dm_table_put(t); + + return r; +} +EXPORT_SYMBOL_GPL(dm_create_error_table); + static void free_devices(struct list_head *devices) { struct list_head *tmp, *next; |