show additional info if btrfs subvolume deletion fails (issue #315)

Unprivileged users require "-o user_subvol_rm_allowed" mount option for btrfs. Make the INFO level message to ERROR to make it clear, which now says following; [caglar@qop:~] lxc-destroy -n rubik lxc_container: Is the rootfs mounted with -o user_subvol_rm_allowed? lxc_container: Error destroying rootfs for rubik Destroying rubik failed Signed-off-by: S.Çağlar Onur <caglar@10ur.org> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

show additional info if btrfs subvolume deletion fails (issue #315)
2b96d9f6 · S.Çağlar Onur · Stéphane Graber · 18d27b5b · 2b96d9f6
Commit 2b96d9f6 authored Aug 22, 2014 by S.Çağlar Onur Committed by Stéphane Graber Sep 19, 2014
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bdev.c src/lxc/bdev.c +1 -1

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--- a/src/lxc/bdev.c
+++ b/src/lxc/bdev.c
@@ -1551,7 +1551,7 @@ static int btrfs_do_destroy_subvol(const char *path)
 	ret = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
 	INFO("btrfs: snapshot destroy ioctl returned %d for %s", ret, path);
 	if (ret < 0 && errno == EPERM)
-		INFO("Is the rootfs mounted with -o user_subvol_rm_allowed?");
+		ERROR("Is the rootfs mounted with -o user_subvol_rm_allowed?");

 	free(newfull);
 	close(fd);