From: Mike Anderson Date: Wed, 9 May 2007 09:32:57 +0000 (-0700) Subject: dm: allow offline devices X-Git-Tag: v2.6.22-rc1~305 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2cd54d9bedb79a97f014e86c0da393416b264eb3;p=linux-2.6 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 Signed-off-by: Alasdair G Kergon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 05befa9180..2fc199b001 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))); }