shithub: lwext4

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ext4: count on free blocks and inodes number after journal recovery.

--- a/src/ext4.c

+++ b/src/ext4.c

@@ -48,6 +48,7 @@

 #include "ext4_dir.h"

 #include "ext4_inode.h"

 #include "ext4_super.h"

+#include "ext4_block_group.h"

 #include "ext4_dir_idx.h"

 #include "ext4_xattr.h"

 #include "ext4_journal.h"

@@ -565,7 +566,31 @@

 		jbd_put_fs(jbd_fs);

 		free(jbd_fs);

 	}

+	if (r == EOK && !mp->fs.read_only) {

+		uint32_t bgid;

+		uint64_t free_blocks_count = 0;

+		uint32_t free_inodes_count = 0;

+		struct ext4_block_group_ref bg_ref;

+		/* Update superblock's stats */

+		for (bgid = 0;bgid < ext4_block_group_cnt(&mp->fs.sb);bgid++) {

+			r = ext4_fs_get_block_group_ref(&mp->fs, bgid, &bg_ref);

+			if (r != EOK)

+				goto Finish;

+

+			free_blocks_count +=

+				ext4_bg_get_free_blocks_count(bg_ref.block_group,

+						&mp->fs.sb);

+			free_inodes_count +=

+				ext4_bg_get_free_inodes_count(bg_ref.block_group,

+						&mp->fs.sb);

+

+			ext4_fs_put_block_group_ref(&bg_ref);

+		}

+		ext4_sb_set_free_blocks_cnt(&mp->fs.sb, free_blocks_count);

+		ext4_set32(&mp->fs.sb, free_inodes_count, free_inodes_count);

+		/* We don't need to save the superblock stats immediately. */

+	}

 Finish:

 	EXT4_MP_UNLOCK(mp);