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Commit 9dc47400 authored by Joel Becker's avatar Joel Becker
Browse files

ocfs2: Handle value tree roots in ocfs2_xa_set_inline_value() 



Previously the xattr code would send in a fake value, containing a tree
root, to the function that installed name+value pairs.  Instead, we pass
the real value to ocfs2_xa_set_inline_value(), and it notices that the
value cannot fit.  Thus, it installs a tree root.

Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
parent 69a3e539

fs/ocfs2/xattr.c

+16 −38
Original line number Diff line number Diff line
@@ -1968,14 +1968,19 @@ static void ocfs2_xa_store_inline_value(struct ocfs2_xa_loc *loc, 
{

	int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);

	int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);

	int size = namevalue_size_xi(xi);

	int inline_value_size = namevalue_size_xi(xi) - name_size;

	const void *value = xi->xi_value;

	char *nameval_buf;



	if (!xi->xi_value)

		return;



	if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {

		value = &def_xv;

		inline_value_size = OCFS2_XATTR_ROOT_SIZE;

	}

	nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);

	memcpy(nameval_buf + name_size, xi->xi_value, size - name_size);

	memcpy(nameval_buf + name_size, value, inline_value_size);

}



static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
@@ -2054,13 +2059,6 @@ static int ocfs2_xattr_set_entry(struct inode *inode, 
	u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name,

					      xi->xi_name_len);

	struct ocfs2_xa_loc loc;

	struct ocfs2_xattr_info xi_l = {

		.xi_name_index = xi->xi_name_index,

		.xi_name = xi->xi_name,

		.xi_name_len = xi->xi_name_len,

		.xi_value = xi->xi_value,

		.xi_value_len = xi->xi_value_len,

	};

	struct ocfs2_xattr_value_buf vb = {

		.vb_bh = xs->xattr_bh,

		.vb_access = ocfs2_journal_access_di,
@@ -2090,17 +2088,10 @@ static int ocfs2_xattr_set_entry(struct inode *inode, 
		free += ocfs2_xe_entry_usage(xs->here);



	/* Check free space in inode or block */

	if (xi->xi_value) {

		if (free < ocfs2_xi_entry_usage(xi)) {

	if (xi->xi_value && (free < ocfs2_xi_entry_usage(xi))) {

		ret = -ENOSPC;

		goto out;

	}

		if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {

			size_l = namevalue_size_xi(xi);

			xi_l.xi_value = (void *)&def_xv;

			xi_l.xi_value_len = OCFS2_XATTR_ROOT_SIZE;

		}

	}



	if (!xs->not_found) {

		/* For existing extended attribute */
@@ -5255,8 +5246,7 @@ static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, 
					   handle_t *handle,

					   struct ocfs2_xattr_info *xi,

					   struct ocfs2_xattr_search *xs,

					   u32 name_hash,

					   int local)

					   u32 name_hash)

{

	int ret;

	u64 blkno;
@@ -5571,13 +5561,14 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode, 
				     struct ocfs2_xattr_search *xs,

				     struct ocfs2_xattr_set_ctxt *ctxt)

{

	int ret, local = 1;

	int ret;

	size_t value_len;

	char *val = (char *)xi->xi_value;

	struct ocfs2_xattr_entry *xe = xs->here;

	u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name,

					      xi->xi_name_len);



	value_len = xi->xi_value_len;

	if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {

		/*

		 * We need to truncate the xattr storage first.
@@ -5591,9 +5582,7 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode, 
		 * the modification to the xattr block will be done

		 * by following steps.

		 */

		if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)

			value_len = xi->xi_value_len;

		else

		if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE)

			value_len = 0;



		ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
@@ -5606,26 +5595,15 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode, 
			goto set_value_outside;

	}



	value_len = xi->xi_value_len;

	/* So we have to handle the inside block change now. */

	if (value_len > OCFS2_XATTR_INLINE_SIZE) {

		/*

		 * If the new value will be stored outside of block,

		 * initalize a new empty value root and insert it first.

		 */

		local = 0;

		xi->xi_value = &def_xv;

		xi->xi_value_len = OCFS2_XATTR_ROOT_SIZE;

	}



	ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,

					      name_hash, local);

					      name_hash);

	if (ret) {

		mlog_errno(ret);

		goto out;

	}



	if (value_len <= OCFS2_XATTR_INLINE_SIZE)

	if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE)

		goto out;



	/* allocate the space now for the outside block storage. */