The patch titled
dm: allow offline devices
has been added to the -mm tree. Its filename is
dm-allow-offline-devices.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dm: allow offline devices
From: Mike Anderson <andmike@xxxxxxxxxx>
Allow check_device_area to succeed if a device has an i_size of zero. This
addresses an issue seen on DASD devices setting up a multipath table for paths
in online and offline state.
Signed-off-by: Mike Anderson <andmike@xxxxxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-table.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff -puN drivers/md/dm-table.c~dm-allow-offline-devices drivers/md/dm-table.c
--- a/drivers/md/dm-table.c~dm-allow-offline-devices
+++ a/drivers/md/dm-table.c
@@ -425,13 +425,15 @@ static void close_dev(struct dm_dev *d,
}
/*
- * If possible (ie. blk_size[major] is set), this checks an area
- * of a destination device is valid.
+ * If possible, this checks an area of a destination device is valid.
*/
static int check_device_area(struct dm_dev *dd, sector_t start, sector_t len)
{
- sector_t dev_size;
- dev_size = dd->bdev->bd_inode->i_size >> SECTOR_SHIFT;
+ sector_t dev_size = dd->bdev->bd_inode->i_size >> SECTOR_SHIFT;
+
+ if (!dev_size)
+ return 1;
+
return ((start < dev_size) && (len <= (dev_size - start)));
}
_
Patches currently in -mm which might be from andmike@xxxxxxxxxx are
dm-allow-offline-devices.patch
-
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