Merge branch 'dt/schema-cleanups' into dt/linus

1 files changed, 29 insertions, 2 deletions

diff --git a/include/uapi/linux/loop.h b/include/uapi/linux/loop.h
index 080a8df134ef..24a1c45bd1ae 100644
--- a/include/uapi/linux/loop.h
+++ b/include/uapi/linux/loop.h
@@ -25,6 +25,16 @@ enum {
 	LO_FLAGS_DIRECT_IO	= 16,
 };
 
+/* LO_FLAGS that can be set using LOOP_SET_STATUS(64) */
+#define LOOP_SET_STATUS_SETTABLE_FLAGS (LO_FLAGS_AUTOCLEAR | LO_FLAGS_PARTSCAN)
+
+/* LO_FLAGS that can be cleared using LOOP_SET_STATUS(64) */
+#define LOOP_SET_STATUS_CLEARABLE_FLAGS (LO_FLAGS_AUTOCLEAR)
+
+/* LO_FLAGS that can be set using LOOP_CONFIGURE */
+#define LOOP_CONFIGURE_SETTABLE_FLAGS (LO_FLAGS_READ_ONLY | LO_FLAGS_AUTOCLEAR \
+				       | LO_FLAGS_PARTSCAN | LO_FLAGS_DIRECT_IO)
+
 #include <asm/posix_types.h>	/* for __kernel_old_dev_t */
 #include <linux/types.h>	/* for __u64 */
 
@@ -37,7 +47,7 @@ struct loop_info {
 	int		   lo_offset;
 	int		   lo_encrypt_type;
 	int		   lo_encrypt_key_size; 	/* ioctl w/o */
-	int		   lo_flags;			/* ioctl r/o */
+	int		   lo_flags;
 	char		   lo_name[LO_NAME_SIZE];
 	unsigned char	   lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
 	unsigned long	   lo_init[2];
@@ -53,13 +63,29 @@ struct loop_info64 {
 	__u32		   lo_number;			/* ioctl r/o */
 	__u32		   lo_encrypt_type;
 	__u32		   lo_encrypt_key_size;		/* ioctl w/o */
-	__u32		   lo_flags;			/* ioctl r/o */
+	__u32		   lo_flags;
 	__u8		   lo_file_name[LO_NAME_SIZE];
 	__u8		   lo_crypt_name[LO_NAME_SIZE];
 	__u8		   lo_encrypt_key[LO_KEY_SIZE]; /* ioctl w/o */
 	__u64		   lo_init[2];
 };
 
+/**
+ * struct loop_config - Complete configuration for a loop device.
+ * @fd: fd of the file to be used as a backing file for the loop device.
+ * @block_size: block size to use; ignored if 0.
+ * @info: struct loop_info64 to configure the loop device with.
+ *
+ * This structure is used with the LOOP_CONFIGURE ioctl, and can be used to
+ * atomically setup and configure all loop device parameters at once.
+ */
+struct loop_config {
+	__u32			fd;
+	__u32                   block_size;
+	struct loop_info64	info;
+	__u64			__reserved[8];
+};
+
 /*
  * Loop filter types
  */
@@ -90,6 +116,7 @@ struct loop_info64 {
 #define LOOP_SET_CAPACITY	0x4C07
 #define LOOP_SET_DIRECT_IO	0x4C08
 #define LOOP_SET_BLOCK_SIZE	0x4C09
+#define LOOP_CONFIGURE		0x4C0A
 
 /* /dev/loop-control interface */
 #define LOOP_CTL_ADD		0x4C80