[PATCH 1/2] btrfs-progs: allow btrfs device scan -u on dead dev

[Boris Burkov <boris@bur.io>]

If a device has been removed from the system, it lingers on in the btrfs
stale device cache. It is useful to be able to forget it, so allow that
by not checking for the file being a proper device file for the forget
path. Kernels that don't handle dead devices by name will do a devt
lookup which will fail, if there is no device, so this isn't a strictly
necessary check, so this isn't a strictly necessary check, so this isn't
a strictly necessary check.

Signed-off-by: Boris Burkov <boris@bur.io>
---
 cmds/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmds/device.c b/cmds/device.c
index 4b34300b5..d52bde2e3 100644
--- a/cmds/device.c
+++ b/cmds/device.c
@@ -487,7 +487,7 @@ static int cmd_device_scan(const struct cmd_struct *cmd, int argc, char **argv)
 	for( i = devstart ; i < argc ; i++ ){
 		char *path;
 
-		if (path_is_block_device(argv[i]) != 1) {
+		if (!forget && path_is_block_device(argv[i]) != 1) {
 			error("not a block device: %s", argv[i]);
 			ret = 1;
 			goto out;
-- 
2.43.0