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Commit d030cc97 authored by Joel Becker's avatar Joel Becker Committed by Mark Fasheh
Browse files

ocfs2: Validate superblock with checksum and ecc. 



The superblock is read via a raw call.  Validate it after we find it
from its signature.

Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent c175a518

fs/ocfs2/super.c

+11 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ 
#include "ocfs1_fs_compat.h"



#include "alloc.h"

#include "blockcheck.h"

#include "dlmglue.h"

#include "export.h"

#include "extent_map.h"
@@ -1989,6 +1990,15 @@ static int ocfs2_verify_volume(struct ocfs2_dinode *di, 


	if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,

		   strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {

		/* We have to do a raw check of the feature here */

		if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &

		    OCFS2_FEATURE_INCOMPAT_META_ECC) {

			status = ocfs2_block_check_validate(bh->b_data,

							    bh->b_size,

							    &di->i_check);

			if (status)

				goto out;

		}

		status = -EINVAL;

		if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {

			mlog(ML_ERROR, "found superblock with incorrect block "
@@ -2030,6 +2040,7 @@ static int ocfs2_verify_volume(struct ocfs2_dinode *di, 
		}

	}



out:

	mlog_exit(status);

	return status;

}