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Commit 1046cb11 authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Al Viro
Browse files

ocfs2: Replace list xattr handler operations 



The list operations of the ocfs2 xattr handlers were never called
anywhere.  Remove them and directly check in ocfs2_xattr_list_entry
which attributes should be skipped over instead.

Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: ocfs2-devel@oss.oracle.com
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent c4803c49

fs/ocfs2/xattr.c

+57 −94
Original line number Diff line number Diff line
@@ -883,14 +883,39 @@ static int ocfs2_xattr_value_truncate(struct inode *inode, 
	return ret;

}



static int ocfs2_xattr_list_entry(char *buffer, size_t size,

				  size_t *result, const char *prefix,

static int ocfs2_xattr_list_entry(struct super_block *sb,

				  char *buffer, size_t size,

				  size_t *result, int type,

				  const char *name, int name_len)

{

	char *p = buffer + *result;

	int prefix_len = strlen(prefix);

	int total_len = prefix_len + name_len + 1;

	const char *prefix;

	int prefix_len;

	int total_len;



	switch(type) {

	case OCFS2_XATTR_INDEX_USER:

		if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)

			return 0;

		break;



	case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:

	case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:

		if (!(sb->s_flags & MS_POSIXACL))

			return 0;

		break;



	case OCFS2_XATTR_INDEX_TRUSTED:

		if (!capable(CAP_SYS_ADMIN))

			return 0;

		break;

	}



	prefix = ocfs2_xattr_prefix(type);

	if (!prefix)

		return 0;

	prefix_len = strlen(prefix);

	total_len = prefix_len + name_len + 1;

	*result += total_len;



	/* we are just looking for how big our buffer needs to be */
@@ -913,24 +938,21 @@ static int ocfs2_xattr_list_entries(struct inode *inode, 
{

	size_t result = 0;

	int i, type, ret;

	const char *prefix, *name;

	const char *name;



	for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {

		struct ocfs2_xattr_entry *entry = &header->xh_entries[i];

		type = ocfs2_xattr_get_type(entry);

		prefix = ocfs2_xattr_prefix(type);



		if (prefix) {

		name = (const char *)header +

			le16_to_cpu(entry->xe_name_offset);



			ret = ocfs2_xattr_list_entry(buffer, buffer_size,

						     &result, prefix, name,

		ret = ocfs2_xattr_list_entry(inode->i_sb,

					     buffer, buffer_size,

					     &result, type, name,

					     entry->xe_name_len);

		if (ret)

			return ret;

	}

	}



	return result;

}
@@ -4032,14 +4054,12 @@ static int ocfs2_list_xattr_bucket(struct inode *inode, 
	int ret = 0, type;

	struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;

	int i, block_off, new_offset;

	const char *prefix, *name;

	const char *name;



	for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {

		struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];

		type = ocfs2_xattr_get_type(entry);

		prefix = ocfs2_xattr_prefix(type);



		if (prefix) {

		ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,

							bucket_xh(bucket),

							i,
@@ -4050,15 +4070,15 @@ static int ocfs2_list_xattr_bucket(struct inode *inode, 


		name = (const char *)bucket_block(bucket, block_off) +

			new_offset;

			ret = ocfs2_xattr_list_entry(xl->buffer,

		ret = ocfs2_xattr_list_entry(inode->i_sb,

					     xl->buffer,

					     xl->buffer_size,

					     &xl->result,

						     prefix, name,

					     type, name,

					     entry->xe_name_len);

		if (ret)

			break;

	}

	}



	return ret;

}
@@ -7225,25 +7245,10 @@ int ocfs2_init_security_and_acl(struct inode *dir, 
leave:

	return ret;

}



/*

 * 'security' attributes support

 */

static size_t ocfs2_xattr_security_list(const struct xattr_handler *handler,

					struct dentry *dentry, char *list,

					size_t list_size, const char *name,

					size_t name_len)

{

	const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;

	const size_t total_len = prefix_len + name_len + 1;



	if (list && total_len <= list_size) {

		memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);

		memcpy(list + prefix_len, name, name_len);

		list[prefix_len + name_len] = '\0';

	}

	return total_len;

}



static int ocfs2_xattr_security_get(const struct xattr_handler *handler,

				    struct dentry *dentry, const char *name,

				    void *buffer, size_t size)
@@ -7308,7 +7313,6 @@ int ocfs2_init_security_set(handle_t *handle, 


const struct xattr_handler ocfs2_xattr_security_handler = {

	.prefix	= XATTR_SECURITY_PREFIX,

	.list	= ocfs2_xattr_security_list,

	.get	= ocfs2_xattr_security_get,

	.set	= ocfs2_xattr_security_set,

};
@@ -7316,25 +7320,6 @@ const struct xattr_handler ocfs2_xattr_security_handler = { 
/*

 * 'trusted' attributes support

 */

static size_t ocfs2_xattr_trusted_list(const struct xattr_handler *handler,

				       struct dentry *dentry, char *list,

				       size_t list_size, const char *name,

				       size_t name_len)

{

	const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;

	const size_t total_len = prefix_len + name_len + 1;



	if (!capable(CAP_SYS_ADMIN))

		return 0;



	if (list && total_len <= list_size) {

		memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);

		memcpy(list + prefix_len, name, name_len);

		list[prefix_len + name_len] = '\0';

	}

	return total_len;

}



static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,

				   struct dentry *dentry, const char *name,

				   void *buffer, size_t size)
@@ -7353,7 +7338,6 @@ static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler, 


const struct xattr_handler ocfs2_xattr_trusted_handler = {

	.prefix	= XATTR_TRUSTED_PREFIX,

	.list	= ocfs2_xattr_trusted_list,

	.get	= ocfs2_xattr_trusted_get,

	.set	= ocfs2_xattr_trusted_set,

};
@@ -7361,26 +7345,6 @@ const struct xattr_handler ocfs2_xattr_trusted_handler = { 
/*

 * 'user' attributes support

 */

static size_t ocfs2_xattr_user_list(const struct xattr_handler *handler,

				    struct dentry *dentry, char *list,

				    size_t list_size, const char *name,

				    size_t name_len)

{

	const size_t prefix_len = XATTR_USER_PREFIX_LEN;

	const size_t total_len = prefix_len + name_len + 1;

	struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);



	if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)

		return 0;



	if (list && total_len <= list_size) {

		memcpy(list, XATTR_USER_PREFIX, prefix_len);

		memcpy(list + prefix_len, name, name_len);

		list[prefix_len + name_len] = '\0';

	}

	return total_len;

}



static int ocfs2_xattr_user_get(const struct xattr_handler *handler,

				struct dentry *dentry, const char *name,

				void *buffer, size_t size)
@@ -7408,7 +7372,6 @@ static int ocfs2_xattr_user_set(const struct xattr_handler *handler, 


const struct xattr_handler ocfs2_xattr_user_handler = {

	.prefix	= XATTR_USER_PREFIX,

	.list	= ocfs2_xattr_user_list,

	.get	= ocfs2_xattr_user_get,

	.set	= ocfs2_xattr_user_set,

};