hfsplus: rework functionality of getting, setting and deleting of extended attributes

[linux-2.6-microblaze.git] / fs / hfsplus / xattr_trusted.c

diff --git a/fs/hfsplus/xattr_trusted.c b/fs/hfsplus/xattr_trusted.c
new file mode 100644 (file)
index 0000000..426cee2
--- /dev/null
+++ b/fs/hfsplus/xattr_trusted.c
@@ -0,0 +1,63 @@
+/*
+ * linux/fs/hfsplus/xattr_trusted.c
+ *
+ * Vyacheslav Dubeyko <slava@dubeyko.com>
+ *
+ * Handler for trusted extended attributes.
+ */
+
+#include "hfsplus_fs.h"
+#include "xattr.h"
+
+static int hfsplus_trusted_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_TRUSTED_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
+               return -EOPNOTSUPP;
+
+       strcpy(xattr_name, XATTR_TRUSTED_PREFIX);
+       strcpy(xattr_name + XATTR_TRUSTED_PREFIX_LEN, name);
+
+       return hfsplus_getxattr(dentry, xattr_name, buffer, size);
+}
+
+static int hfsplus_trusted_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_TRUSTED_PREFIX_LEN > HFSPLUS_ATTR_MAX_STRLEN)
+               return -EOPNOTSUPP;
+
+       strcpy(xattr_name, XATTR_TRUSTED_PREFIX);
+       strcpy(xattr_name + XATTR_TRUSTED_PREFIX_LEN, name);
+
+       return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
+}
+
+static size_t hfsplus_trusted_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_trusted_handler = {
+       .prefix = XATTR_TRUSTED_PREFIX,
+       .list   = hfsplus_trusted_listxattr,
+       .get    = hfsplus_trusted_getxattr,
+       .set    = hfsplus_trusted_setxattr,
+};