zpool import -m also removing spare and cache when log dev is missing

spa_import() relies on a pool config fetched by spa_try_import().
Import flags are not passed to spa_try_import(), which makes it
return early due to a missing log device and missing retrieving the
cache device and spare eventually. In this patch, we pass missing
log flag as part of config to spa_try_import().

Signed-off-by: Ameer Hamza <[email protected]>

Author: ixhamza

cmd/zpool/zpool_main.c

@@ -3549,6 +3549,7 @@ zpool_do_import(int argc, char **argv)
 	boolean_t do_scan = B_FALSE;
 	boolean_t pool_exists = B_FALSE;
 	boolean_t pool_specified = B_FALSE;
+	boolean_t missing_log = B_FALSE;
 	uint64_t txg = -1ULL;
 	char *cachefile = NULL;
 	importargs_t idata = { 0 };
@@ -3588,6 +3589,7 @@ zpool_do_import(int argc, char **argv)
 			break;
 		case 'm':
 			flags |= ZFS_IMPORT_MISSING_LOG;
+			missing_log = B_TRUE;
 			break;
 		case 'n':
 			dryrun = B_TRUE;
@@ -3780,6 +3782,7 @@ zpool_do_import(int argc, char **argv)
 	idata.cachefile = cachefile;
 	idata.scan = do_scan;
 	idata.policy = policy;
+	idata.missing_log = missing_log;
 
 	libpc_handle_t lpch = {
 		.lpc_lib_handle = g_zfs,

include/libzutil.h

@@ -76,6 +76,7 @@ typedef struct importargs {
 	const char *cachefile;	/* cachefile to use for import		*/
 	boolean_t can_be_active; /* can the pool be active?		*/
 	boolean_t scan;		/* prefer scanning to libblkid cache    */
+	boolean_t missing_log;	/* pass missing log flag if supplied    */
 	nvlist_t *policy;	/* load policy (max txg, rewind, etc.)	*/
 } importargs_t;
 

include/sys/fs/zfs.h

@@ -822,6 +822,7 @@ typedef struct zpool_load_policy {
 #define	ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS	"com.delphix:has_per_vdev_zaps"
 #define	ZPOOL_CONFIG_RESILVER_DEFER	"com.datto:resilver_defer"
 #define	ZPOOL_CONFIG_CACHEFILE		"cachefile"	/* not stored on disk */
+#define	ZPOOL_CONFIG_MISSING_LOG	"missing_log"	/* not stored on disk */
 #define	ZPOOL_CONFIG_MMP_STATE		"mmp_state"	/* not stored on disk */
 #define	ZPOOL_CONFIG_MMP_TXG		"mmp_txg"	/* not stored on disk */
 #define	ZPOOL_CONFIG_MMP_SEQ		"mmp_seq"	/* not stored on disk */

lib/libzutil/zutil_import.c

@@ -487,7 +487,7 @@ vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id)
  */
 static nvlist_t *
 get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok,
-    nvlist_t *policy)
+    nvlist_t *policy, boolean_t missing_log)
 {
 	pool_entry_t *pe;
 	vdev_entry_t *ve;
@@ -834,6 +834,12 @@ get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok,
 				goto nomem;
 		}
 
+		if (missing_log == B_TRUE) {
+			if (nvlist_add_boolean(config, ZPOOL_CONFIG_MISSING_LOG)
+			    != 0)
+				goto nomem;
+		}
+
 		if ((nvl = zutil_refresh_config(hdl, config)) == NULL) {
 			nvlist_free(config);
 			config = NULL;
@@ -1515,7 +1521,8 @@ zpool_find_import_impl(libpc_handle_t *hdl, importargs_t *iarg,
 	avl_destroy(cache);
 	free(cache);
 
-	ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy);
+	ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy,
+	    iarg->missing_log);
 
 	for (pe = pools.pools; pe != NULL; pe = penext) {
 		penext = pe->pe_next;

module/zfs/spa.c

@@ -6378,6 +6378,9 @@ spa_tryimport(nvlist_t *tryconfig)
 		spa->spa_config_source = SPA_CONFIG_SRC_SCAN;
 	}
 
+	if (nvlist_lookup_boolean(tryconfig, ZPOOL_CONFIG_MISSING_LOG) == 0)
+		spa->spa_import_flags |= ZFS_IMPORT_MISSING_LOG;
+
 	error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING);
 
 	/*