diff options
author | David Teigland <teigland@redhat.com> | 2006-06-26 03:27:33 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 12:58:36 -0400 |
commit | c2ade42dd35466d90aa6fc7cc717f396e165492f (patch) | |
tree | 245baeabfea43a3b2654adb962e776a877da0059 /drivers/md | |
parent | 17b2f66f2a39a4e4d1ed456f35ee3bb598e41d35 (diff) |
[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 10c9439635ca..827b648fac50 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, | |||
237 | return 0; | 237 | return 0; |
238 | } | 238 | } |
239 | 239 | ||
240 | int dm_create_error_table(struct dm_table **result, struct mapped_device *md) | ||
241 | { | ||
242 | struct dm_table *t; | ||
243 | sector_t dev_size = 1; | ||
244 | int r; | ||
245 | |||
246 | /* | ||
247 | * Find current size of device. | ||
248 | * Default to 1 sector if inactive. | ||
249 | */ | ||
250 | t = dm_get_table(md); | ||
251 | if (t) { | ||
252 | dev_size = dm_table_get_size(t); | ||
253 | dm_table_put(t); | ||
254 | } | ||
255 | |||
256 | r = dm_table_create(&t, FMODE_READ, 1, md); | ||
257 | if (r) | ||
258 | return r; | ||
259 | |||
260 | r = dm_table_add_target(t, "error", 0, dev_size, NULL); | ||
261 | if (r) | ||
262 | goto out; | ||
263 | |||
264 | r = dm_table_complete(t); | ||
265 | if (r) | ||
266 | goto out; | ||
267 | |||
268 | *result = t; | ||
269 | |||
270 | out: | ||
271 | if (r) | ||
272 | dm_table_put(t); | ||
273 | |||
274 | return r; | ||
275 | } | ||
276 | EXPORT_SYMBOL_GPL(dm_create_error_table); | ||
277 | |||
240 | static void free_devices(struct list_head *devices) | 278 | static void free_devices(struct list_head *devices) |
241 | { | 279 | { |
242 | struct list_head *tmp, *next; | 280 | struct list_head *tmp, *next; |