@@ -35,6 +35,8 @@ run in read-only mode (default)
create a new CRC tree and recalculate all checksums
--init-extent-tree::
create a new extent tree
+--low-memory::
+check fs in low memory usage mode(experimental)
--check-data-csum::
verify checksums of data blocks
-p|--progress::
@@ -71,6 +71,7 @@ static int repair = 0;
static int no_holes = 0;
static int init_extent_tree = 0;
static int check_data_csum = 0;
+static int low_memory = 0;
static struct btrfs_fs_info *global_info;
static struct task_ctx ctx = { 0 };
static struct cache_tree *roots_info_cache = NULL;
@@ -9790,6 +9791,63 @@ static int traversal_tree_block(struct btrfs_root *root,
return err;
}
+/*
+ * Low memory usage version check_chunks_and_extents.
+ */
+static int check_chunks_and_extents_v2(struct btrfs_root *root)
+{
+ struct btrfs_path path;
+ struct btrfs_key key;
+ struct btrfs_root *root1;
+ struct btrfs_root *cur_root;
+ int err = 0;
+ int ret;
+
+ root1 = root->fs_info->chunk_root;
+ ret = traversal_tree_block(root1, root1->node);
+ err |= ret;
+
+ root1 = root->fs_info->tree_root;
+ ret = traversal_tree_block(root1, root1->node);
+ err |= ret;
+
+ btrfs_init_path(&path);
+ key.objectid = BTRFS_EXTENT_TREE_OBJECTID;
+ key.offset = 0;
+ key.type = BTRFS_ROOT_ITEM_KEY;
+
+ ret = btrfs_search_slot(NULL, root1, &key, &path, 0, 0);
+ if (ret) {
+ error("couldn't find extent_tree_root from tree_root");
+ goto out;
+ }
+
+ while (1) {
+ btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
+ if (key.type != BTRFS_ROOT_ITEM_KEY)
+ goto next;
+ key.offset = (u64)-1;
+
+ cur_root = btrfs_read_fs_root(root->fs_info, &key);
+ if (IS_ERR(cur_root) || !cur_root) {
+ error("Fail to read tree: %lld", key.objectid);
+ goto next;
+ }
+
+ ret = traversal_tree_block(cur_root, cur_root->node);
+ err |= ret;
+
+next:
+ ret = btrfs_next_item(root1, &path);
+ if (ret)
+ goto out;
+ }
+
+out:
+ btrfs_release_path(&path);
+ return err;
+}
+
static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root, int overwrite)
{
@@ -10906,6 +10964,7 @@ const char * const cmd_check_usage[] = {
"--readonly run in read-only mode (default)",
"--init-csum-tree create a new CRC tree",
"--init-extent-tree create a new extent tree",
+ "--low-memory check in low memory usage mode(experimental)",
"--check-data-csum verify checkums of data blocks",
"-Q|--qgroup-report print a report on qgroup consistency",
"-E|--subvol-extents <subvolid>",
@@ -10937,7 +10996,8 @@ int cmd_check(int argc, char **argv)
int c;
enum { GETOPT_VAL_REPAIR = 257, GETOPT_VAL_INIT_CSUM,
GETOPT_VAL_INIT_EXTENT, GETOPT_VAL_CHECK_CSUM,
- GETOPT_VAL_READONLY, GETOPT_VAL_CHUNK_TREE };
+ GETOPT_VAL_READONLY, GETOPT_VAL_CHUNK_TREE,
+ GETOPT_VAL_LOW_MEMORY };
static const struct option long_options[] = {
{ "super", required_argument, NULL, 's' },
{ "repair", no_argument, NULL, GETOPT_VAL_REPAIR },
@@ -10955,6 +11015,8 @@ int cmd_check(int argc, char **argv)
{ "chunk-root", required_argument, NULL,
GETOPT_VAL_CHUNK_TREE },
{ "progress", no_argument, NULL, 'p' },
+ { "low-memory", no_argument, NULL,
+ GETOPT_VAL_LOW_MEMORY },
{ NULL, 0, NULL, 0}
};
@@ -11019,6 +11081,9 @@ int cmd_check(int argc, char **argv)
case GETOPT_VAL_CHECK_CSUM:
check_data_csum = 1;
break;
+ case GETOPT_VAL_LOW_MEMORY:
+ low_memory = 1;
+ break;
}
}
@@ -11036,6 +11101,14 @@ int cmd_check(int argc, char **argv)
exit(1);
}
+ /*
+ * Not supported yet
+ */
+ if (repair && low_memory) {
+ error("Low memory mode doesn't support repair yet");
+ exit(1);
+ }
+
radix_tree_init();
cache_tree_init(&root_cache);
@@ -11159,7 +11232,10 @@ int cmd_check(int argc, char **argv)
if (!ctx.progress_enabled)
fprintf(stderr, "checking extents\n");
- ret = check_chunks_and_extents(root);
+ if (low_memory)
+ ret = check_chunks_and_extents_v2(root);
+ else
+ ret = check_chunks_and_extents(root);
if (ret)
fprintf(stderr, "Errors found in extent allocation tree or chunk allocation\n");