X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fxattr.c;h=9b932b95d74e4faeb5653d1a3c4b11553d1e51e1;hb=398dc60dc59f499cf2d19d18a8a1a382ed733100;hp=072fee1258dd87e58d44ab3263909bab4f3a2e89;hpb=d7b273685fedba5359a4ba0ae4f542e3ece28153;p=firefly-linux-kernel-4.4.55.git

diff --git a/fs/xattr.c b/fs/xattr.c
index 072fee1258dd..9b932b95d74e 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -720,7 +720,7 @@ generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t s
 	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
 	if (!handler)
 		return -EOPNOTSUPP;
-	return handler->get(dentry, name, buffer, size, handler->flags);
+	return handler->get(handler, dentry, name, buffer, size);
 }
 
 /*
@@ -735,15 +735,15 @@ generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 
 	if (!buffer) {
 		for_each_xattr_handler(handlers, handler) {
-			size += handler->list(dentry, NULL, 0, NULL, 0,
-					      handler->flags);
+			size += handler->list(handler, dentry, NULL, 0,
+					      NULL, 0);
 		}
 	} else {
 		char *buf = buffer;
 
 		for_each_xattr_handler(handlers, handler) {
-			size = handler->list(dentry, buf, buffer_size,
-					     NULL, 0, handler->flags);
+			size = handler->list(handler, dentry, buf, buffer_size,
+					     NULL, 0);
 			if (size > buffer_size)
 				return -ERANGE;
 			buf += size;
@@ -767,7 +767,7 @@ generic_setxattr(struct dentry *dentry, const char *name, const void *value, siz
 	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
 	if (!handler)
 		return -EOPNOTSUPP;
-	return handler->set(dentry, name, value, size, flags, handler->flags);
+	return handler->set(handler, dentry, name, value, size, flags);
 }
 
 /*
@@ -782,8 +782,7 @@ generic_removexattr(struct dentry *dentry, const char *name)
 	handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
 	if (!handler)
 		return -EOPNOTSUPP;
-	return handler->set(dentry, name, NULL, 0,
-			    XATTR_REPLACE, handler->flags);
+	return handler->set(handler, dentry, name, NULL, 0, XATTR_REPLACE);
 }
 
 EXPORT_SYMBOL(generic_getxattr);
@@ -791,6 +790,30 @@ EXPORT_SYMBOL(generic_listxattr);
 EXPORT_SYMBOL(generic_setxattr);
 EXPORT_SYMBOL(generic_removexattr);
 
+/**
+ * xattr_full_name  -  Compute full attribute name from suffix
+ *
+ * @handler:	handler of the xattr_handler operation
+ * @name:	name passed to the xattr_handler operation
+ *
+ * The get and set xattr handler operations are called with the remainder of
+ * the attribute name after skipping the handler's prefix: for example, "foo"
+ * is passed to the get operation of a handler with prefix "user." to get
+ * attribute "user.foo".  The full name is still "there" in the name though.
+ *
+ * Note: the list xattr handler operation when called from the vfs is passed a
+ * NULL name; some file systems use this operation internally, with varying
+ * semantics.
+ */
+const char *xattr_full_name(const struct xattr_handler *handler,
+			    const char *name)
+{
+	size_t prefix_len = strlen(handler->prefix);
+
+	return name - prefix_len;
+}
+EXPORT_SYMBOL(xattr_full_name);
+
 /*
  * Allocate new xattr and copy in the value; but leave the name to callers.
  */