Description: Disable bpool upgrade
 On ubuntu, upgrade of bpool is disabled to prevent users to break their
 system by upgrading to features not supported by GRUB.
Author: Jean-Baptiste Lallement <jean.baptiste@ubuntu.com>
        Didier Roche <didrocks@ubuntu.com>
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1847389
Forwarded: not-needed
Last-Update: 2020-04-14
===================================================================
Index: zfs-linux-2.1.2/cmd/zpool/zpool_main.c
===================================================================
--- zfs-linux-2.1.2.orig/cmd/zpool/zpool_main.c
+++ zfs-linux-2.1.2/cmd/zpool/zpool_main.c
@@ -8842,6 +8842,16 @@ upgrade_enable_all(zpool_handle_t *zhp,
 {
 	int i, ret, count;
 	boolean_t firstff = B_TRUE;
+
+	// On ubuntu, upgrade of bpool is disabled to prevent users to break their
+	// system by upgrading to features not supported by GRUB
+	if (strcmp("bpool", zpool_get_name(zhp)) == 0) {
+		(void) fprintf(stderr, gettext("'zpool upgrade' is disabled for"
+		    " 'bpool' to keep compatibility with GRUB.\n"
+		    "Skipping upgrade.\n"));
+		return (0);
+	}
+
 	nvlist_t *enabled = zpool_get_features(zhp);
 
 	char compat[ZFS_MAXPROPLEN];
Index: zfs-linux-2.1.2/lib/libzfs/libzfs_status.c
===================================================================
--- zfs-linux-2.1.2.orig/lib/libzfs/libzfs_status.c
+++ zfs-linux-2.1.2/lib/libzfs/libzfs_status.c
@@ -526,6 +526,14 @@ zpool_get_status(zpool_handle_t *zhp, ch
 		else
 			*msgid = zfs_msgid_table[ret];
 	}
+
+	// On Ubuntu GRUB is incompatible with newest features of zfs. In order to
+	// prevent people from upgrading bpool, the message to suggest to upgrade
+	// the pool is removed.
+	if (ret == ZPOOL_STATUS_FEAT_DISABLED && strcmp(zpool_get_name(zhp), "bpool") == 0) {
+		ret = ZPOOL_STATUS_OK;
+	}
+
 	return (ret);
 }