From 127e5f5ae51eff44c9bff673f24e8587caa4e29f Mon Sep 17 00:00:00 2001
From: Vyacheslav Dubeyko <slava@dubeyko.com>
Date: Wed, 27 Feb 2013 17:03:03 -0800
Subject: hfsplus: rework functionality of getting, setting and deleting of
 extended attributes

Rework functionality of getting, setting and deleting of extended attributes.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/hfsplus/xattr_user.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 fs/hfsplus/xattr_user.c

(limited to 'fs/hfsplus/xattr_user.c')

diff --git a/fs/hfsplus/xattr_user.c b/fs/hfsplus/xattr_user.c
new file mode 100644
index 000000000000..e34016561ae0
--- /dev/null
+++ b/fs/hfsplus/xattr_user.c
@@ -0,0 +1,63 @@
+/*
+ * linux/fs/hfsplus/xattr_user.c
+ *
+ * Vyacheslav Dubeyko <slava@dubeyko.com>
+ *
+ * Handler for user extended attributes.
+ */
+
+#include "hfsplus_fs.h"
+#include "xattr.h"
+
+static int hfsplus_user_getxattr(struct dentry *dentry, const char *name,
+					void *buffer, size_t size, int type)
+{
+	char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
+	size_t len = strlen(name);
+
+	if (!strcmp(name, ""))
+		return -EINVAL;
+
+	if (len + XATTR_USER_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
+		return -EOPNOTSUPP;
+
+	strcpy(xattr_name, XATTR_USER_PREFIX);
+	strcpy(xattr_name + XATTR_USER_PREFIX_LEN, name);
+
+	return hfsplus_getxattr(dentry, xattr_name, buffer, size);
+}
+
+static int hfsplus_user_setxattr(struct dentry *dentry, const char *name,
+		const void *buffer, size_t size, int flags, int type)
+{
+	char xattr_name[HFSPLUS_ATTR_MAX_STRLEN + 1] = {0};
+	size_t len = strlen(name);
+
+	if (!strcmp(name, ""))
+		return -EINVAL;
+
+	if (len + XATTR_USER_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
+		return -EOPNOTSUPP;
+
+	strcpy(xattr_name, XATTR_USER_PREFIX);
+	strcpy(xattr_name + XATTR_USER_PREFIX_LEN, name);
+
+	return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
+}
+
+static size_t hfsplus_user_listxattr(struct dentry *dentry, char *list,
+		size_t list_size, const char *name, size_t name_len, int type)
+{
+	/*
+	 * This method is not used.
+	 * It is used hfsplus_listxattr() instead of generic_listxattr().
+	 */
+	return -EOPNOTSUPP;
+}
+
+const struct xattr_handler hfsplus_xattr_user_handler = {
+	.prefix	= XATTR_USER_PREFIX,
+	.list	= hfsplus_user_listxattr,
+	.get	= hfsplus_user_getxattr,
+	.set	= hfsplus_user_setxattr,
+};
-- 
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