virtio-9p: Use layered xattr approach

We would need this to make sure we handle the mapped
security model correctly for different xattr names.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/hw/virtio-9p-xattr.h b/hw/virtio-9p-xattr.h
new file mode 100644
index 0000000000..15632f8138
--- /dev/null
+++ b/hw/virtio-9p-xattr.h
@@ -0,0 +1,69 @@
+/*
+ * Virtio 9p
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+#ifndef _QEMU_VIRTIO_9P_XATTR_H
+#define _QEMU_VIRTIO_9P_XATTR_H
+
+#include <attr/xattr.h>
+
+typedef struct xattr_operations
+{
+    const char *name;
+    ssize_t (*getxattr)(FsContext *ctx, const char *path,
+                        const char *name, void *value, size_t size);
+    ssize_t (*listxattr)(FsContext *ctx, const char *path,
+                         char *name, void *value, size_t size);
+    int (*setxattr)(FsContext *ctx, const char *path, const char *name,
+                    void *value, size_t size, int flags);
+    int (*removexattr)(FsContext *ctx,
+                       const char *path, const char *name);
+} XattrOperations;
+
+
+extern XattrOperations mapped_user_xattr;
+extern XattrOperations passthrough_user_xattr;
+
+extern XattrOperations *mapped_xattr_ops[];
+extern XattrOperations *passthrough_xattr_ops[];
+extern XattrOperations *none_xattr_ops[];
+
+extern ssize_t v9fs_get_xattr(FsContext *ctx, const char *path,
+                              const char *name, void *value, size_t size);
+extern ssize_t v9fs_list_xattr(FsContext *ctx, const char *path,
+                               void *value, size_t vsize);
+extern int v9fs_set_xattr(FsContext *ctx, const char *path, const char *name,
+                          void *value, size_t size, int flags);
+extern int v9fs_remove_xattr(FsContext *ctx,
+                             const char *path, const char *name);
+extern ssize_t pt_listxattr(FsContext *ctx, const char *path,
+                            char *name, void *value, size_t size);
+
+static inline ssize_t pt_getxattr(FsContext *ctx, const char *path,
+                                  const char *name, void *value, size_t size)
+{
+    return lgetxattr(rpath(ctx, path), name, value, size);
+}
+
+static inline int pt_setxattr(FsContext *ctx, const char *path,
+                              const char *name, void *value,
+                              size_t size, int flags)
+{
+    return lsetxattr(rpath(ctx, path), name, value, size, flags);
+}
+
+static inline int pt_removexattr(FsContext *ctx,
+                                 const char *path, const char *name)
+{
+    return lremovexattr(rpath(ctx, path), name);
+}
+
+#endif