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| author | Mike Anderson <andmike@us.ibm.com> | 2007-05-09 02:32:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-09 12:30:47 -0700 |
| commit | 2cd54d9bedb79a97f014e86c0da393416b264eb3 (patch) | |
| tree | bb7b81120cdd84e106da22222b6eec57e45ac5c4 /drivers/md | |
| parent | 79eb885c96b5ccf8bbffd0dddc4c15a5dd436a1c (diff) | |
| download | linux-2cd54d9bedb79a97f014e86c0da393416b264eb3.tar.gz linux-2cd54d9bedb79a97f014e86c0da393416b264eb3.tar.bz2 linux-2cd54d9bedb79a97f014e86c0da393416b264eb3.zip | |
dm: allow offline devices
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@us.ibm.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-table.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 05befa91807a..2fc199b0016b 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -425,13 +425,15 @@ static void close_dev(struct dm_dev *d, struct mapped_device *md) } /* - * 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))); } |