Commit d6b32bbb authored by Joel Becker's avatar Joel Becker Committed by Mark Fasheh
Browse files

ocfs2: block read meta ecc. 



Add block check calls to the read_block validate functions.  This is the
almost all of the read-side checking of metaecc.  xattr buckets are not checked
yet.   Writes are also unchecked, and so a read-write mount will quickly fail.

Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent 684ef278

fs/ocfs2/alloc.c

+17 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 


#include "alloc.h"

#include "aops.h"

#include "blockcheck.h"

#include "dlmglue.h"

#include "extent_map.h"

#include "inode.h"
@@ -682,12 +683,28 @@ struct ocfs2_merge_ctxt { 
static int ocfs2_validate_extent_block(struct super_block *sb,

				       struct buffer_head *bh)

{

	int rc;

	struct ocfs2_extent_block *eb =

		(struct ocfs2_extent_block *)bh->b_data;



	mlog(0, "Validating extent block %llu\n",

	     (unsigned long long)bh->b_blocknr);



	BUG_ON(!buffer_uptodate(bh));



	/*

	 * If the ecc fails, we return the error but otherwise

	 * leave the filesystem running.  We know any error is

	 * local to this block.

	 */

	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &eb->h_check);

	if (rc)

		return rc;



	/*

	 * Errors after here are fatal.

	 */



	if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {

		ocfs2_error(sb,

			    "Extent block #%llu has bad signature %.*s",

fs/ocfs2/blockcheck.c

+9 −0
Original line number Diff line number Diff line
@@ -24,6 +24,8 @@ 
#include <linux/bitops.h>

#include <asm/byteorder.h>



#include <cluster/masklog.h>



#include "ocfs2.h"



#include "blockcheck.h"
@@ -292,6 +294,10 @@ int ocfs2_block_check_validate(void *data, size_t blocksize, 
	if (crc == check.bc_crc32e)

		goto out;



	mlog(ML_ERROR,

	     "CRC32 failed: stored: %u, computed %u.  Applying ECC.\n",

	     (unsigned int)check.bc_crc32e, (unsigned int)crc);



	/* Ok, try ECC fixups */

	ecc = ocfs2_hamming_encode_block(data, blocksize);

	ocfs2_hamming_fix_block(data, blocksize, ecc ^ check.bc_ecc);
@@ -301,6 +307,9 @@ int ocfs2_block_check_validate(void *data, size_t blocksize, 
	if (crc == check.bc_crc32e)

		goto out;



	mlog(ML_ERROR, "Fixed CRC32 failed: stored: %u, computed %u\n",

	     (unsigned int)check.bc_crc32e, (unsigned int)crc);



	rc = -EIO;



out:

fs/ocfs2/inode.c

+17 −1
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include "ocfs2.h"



#include "alloc.h"

#include "blockcheck.h"

#include "dlmglue.h"

#include "extent_map.h"

#include "file.h"
@@ -1262,7 +1263,7 @@ void ocfs2_refresh_inode(struct inode *inode, 
int ocfs2_validate_inode_block(struct super_block *sb,

			       struct buffer_head *bh)

{

	int rc = -EINVAL;

	int rc;

	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;



	mlog(0, "Validating dinode %llu\n",
@@ -1270,6 +1271,21 @@ int ocfs2_validate_inode_block(struct super_block *sb, 


	BUG_ON(!buffer_uptodate(bh));



	/*

	 * If the ecc fails, we return the error but otherwise

	 * leave the filesystem running.  We know any error is

	 * local to this block.

	 */

	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);

	if (rc)

		goto bail;



	/*

	 * Errors after here are fatal.

	 */



	rc = -EINVAL;



	if (!OCFS2_IS_VALID_DINODE(di)) {

		ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",

			    (unsigned long long)bh->b_blocknr, 7,

fs/ocfs2/quota_global.c

+11 −2
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include "ocfs2_fs.h"

#include "ocfs2.h"

#include "alloc.h"

#include "blockcheck.h"

#include "inode.h"

#include "journal.h"

#include "file.h"
@@ -90,12 +91,20 @@ struct qtree_fmt_operations ocfs2_global_ops = { 
static int ocfs2_validate_quota_block(struct super_block *sb,

				      struct buffer_head *bh)

{

	struct ocfs2_disk_dqtrailer *dqt = ocfs2_dq_trailer(sb, bh->b_data);

	struct ocfs2_disk_dqtrailer *dqt =

		ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);



	mlog(0, "Validating quota block %llu\n",

	     (unsigned long long)bh->b_blocknr);



	return 0;

	BUG_ON(!buffer_uptodate(bh));



	/*

	 * If the ecc fails, we return the error but otherwise

	 * leave the filesystem running.  We know any error is

	 * local to this block.

	 */

	return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);

}



int ocfs2_read_quota_block(struct inode *inode, u64 v_block,

fs/ocfs2/suballoc.c

+30 −1
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include "ocfs2.h"



#include "alloc.h"

#include "blockcheck.h"

#include "dlmglue.h"

#include "inode.h"

#include "journal.h"
@@ -250,7 +251,17 @@ int ocfs2_check_group_descriptor(struct super_block *sb, 
				 struct buffer_head *bh)

{

	int rc;

	struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data;



	BUG_ON(!buffer_uptodate(bh));



	/*

	 * If the ecc fails, we return the error but otherwise

	 * leave the filesystem running.  We know any error is

	 * local to this block.

	 */

	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check);

	if (!rc)

		rc = ocfs2_validate_gd_self(sb, bh, 1);

	if (!rc)

		rc = ocfs2_validate_gd_parent(sb, di, bh, 1);
@@ -261,9 +272,27 @@ int ocfs2_check_group_descriptor(struct super_block *sb, 
static int ocfs2_validate_group_descriptor(struct super_block *sb,

					   struct buffer_head *bh)

{

	int rc;

	struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data;



	mlog(0, "Validating group descriptor %llu\n",

	     (unsigned long long)bh->b_blocknr);



	BUG_ON(!buffer_uptodate(bh));



	/*

	 * If the ecc fails, we return the error but otherwise

	 * leave the filesystem running.  We know any error is

	 * local to this block.

	 */

	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &gd->bg_check);

	if (rc)

		return rc;



	/*

	 * Errors after here are fatal.

	 */



	return ocfs2_validate_gd_self(sb, bh, 0);

}

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