ref: 7a6821a6ec64873b3220cffee3b96d2e8e08ee15
parent: 80db1e5d2d318f79f13a2b7b51e485b571995961
author: ngkaho1234 <ngkaho1234@gmail.com>
date: Thu Oct 29 01:55:20 EDT 2015
METADATA_CSUM: linear directory checksum verification added
--- a/lwext4/ext4_dir.c
+++ b/lwext4/ext4_dir.c
@@ -95,10 +95,11 @@
#define ext4_dir_checksum(...) 0
#endif
-__unused static bool
+bool
ext4_dir_checksum_verify(struct ext4_inode_ref *inode_ref,
struct ext4_directory_entry_ll *dirent)
{+#ifdef CONFIG_META_CSUM_ENABLE
struct ext4_directory_entry_tail *t;
struct ext4_sblock *sb = &inode_ref->fs->sb;
@@ -115,6 +116,7 @@
return false;
}
+#endif
return true;
}
@@ -217,7 +219,7 @@
/* Compute next block address */
uint32_t block_size = ext4_sb_get_block_size(&it->inode_ref->fs->sb);
uint64_t current_block_idx = it->current_offset / block_size;
- uint64_t next_block_idx = pos / block_size;
+ uint32_t next_block_idx = pos / block_size;
/*
* If we don't have a block or are moving across block boundary,
@@ -248,6 +250,18 @@
it->current_block.lb_id = 0;
return rc;
}
+
+ if (!ext4_dir_checksum_verify(
+ it->inode_ref,
+ (struct ext4_directory_entry_ll *)
+ it->current_block.data)) {+ ext4_dbg(DEBUG_DIR,
+ DBG_WARN "Leaf block checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ it->inode_ref->index,
+ next_block_idx);
+ }
}
it->current_offset = pos;
@@ -379,6 +393,18 @@
if (rc != EOK)
return rc;
+ if (!ext4_dir_checksum_verify(
+ parent,
+ (struct ext4_directory_entry_ll *)
+ block.data)) {+ ext4_dbg(DEBUG_DIR,
+ DBG_WARN "Leaf block checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ parent->index,
+ iblock);
+ }
+
/* If adding is successful, function can finish */
rc = ext4_dir_try_insert_entry(&fs->sb, parent, &block, child, name,
name_len);
@@ -481,6 +507,18 @@
rc = ext4_block_get(parent->fs->bdev, &block, fblock);
if (rc != EOK)
return rc;
+
+ if (!ext4_dir_checksum_verify(
+ parent,
+ (struct ext4_directory_entry_ll *)
+ block.data)) {+ ext4_dbg(DEBUG_DIR,
+ DBG_WARN "Leaf block checksum failed."
+ "Inode: %" PRIu32", "
+ "Block: %" PRIu32"\n",
+ parent->index,
+ iblock);
+ }
/* Try to find entry in block */
struct ext4_directory_entry_ll *res_entry;