Commit 18e503d6 authored Oct 28, 2010 by Chris Mason

Btrfs: fix raid code for removing missing drives



When btrfs is mounted in degraded mode, it has some internal structures
to track the missing devices.  This missing device is setup as readonly,
but the mapping code can get upset when we try to write to it.

This changes the mapping code to return -EIO instead of oops when we try
to write to the readonly device.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 19fe0a8b

fs/btrfs/volumes.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -3034,8 +3034,7 @@ int btrfs_map_bio(struct btrfs_root root, int rw, struct bio bio,
		}
		bio->bi_sector = multi->stripes[dev_nr].physical >> 9;
		dev = multi->stripes[dev_nr].dev;
		BUG_ON(rw == WRITE && !dev->writeable);
		if (dev && dev->bdev) {
		if (dev && dev->bdev && (rw != WRITE \|\| dev->writeable)) {
		bio->bi_bdev = dev->bdev;
		if (async_submit)
		schedule_bio(root, dev, rw, bio);

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