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

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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>
This commit is contained in:
S.Çağlar Onur 2014-08-22 12:10:12 -04:00 committed by Stéphane Graber
parent 61c237221d
commit cf03f973a8
1 changed files with 1 additions and 1 deletions
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2
src/lxc/bdev.c
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@ -1552,7 +1552,7 @@ 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);