+#include <string.h>
+
+/* WIM magic characters, translated to a single 64-bit little endian number. */
+#define WIM_MAGIC \
+ cpu_to_le64(((u64)'M' << 0) | \
+ ((u64)'S' << 8) | \
+ ((u64)'W' << 16) | \
+ ((u64)'I' << 24) | \
+ ((u64)'M' << 32) | \
+ ((u64)'\0' << 40) | \
+ ((u64)'\0' << 48) | \
+ ((u64)'\0' << 54))
+
+/* On-disk format of the WIM header. */
+struct wim_header_disk {
+
+ /* Magic characters "MSWIM\0\0\0" */
+ le64 magic;
+
+ /* Size of the WIM header, in bytes; WIM_HEADER_DISK_SIZE expected
+ * (currently the only supported value). */
+ u32 hdr_size;
+
+ /* Version of the WIM file; WIM_VERSION expected (currently the only
+ * supported value). */
+ u32 wim_version;
+
+ /* Flags for the WIM file (WIM_HDR_FLAG_*) */
+ u32 wim_flags;
+
+ /* Uncompressed chunk size of resources in the WIM. 0 if the WIM is
+ * uncompressed. If compressed, WIM_CHUNK_SIZE is expected (currently
+ * the only supported value). */
+ u32 chunk_size;
+
+ /* Globally unique identifier for the WIM file. Basically a bunch of
+ * random bytes. */
+ u8 guid[WIM_GID_LEN];
+
+ /* Number of this WIM part in the split WIM file, indexed from 1, or 1
+ * if the WIM is not split. */
+ u16 part_number;
+
+ /* Total number of parts of the split WIM file, or 1 if the WIM is not
+ * split. */
+ u16 total_parts;
+
+ /* Number of images in the WIM. */
+ u32 image_count;
+
+ /* Location and size of the WIM's lookup table. */
+ struct resource_entry_disk lookup_table_res_entry;
+
+ /* Location and size of the WIM's XML data. */
+ struct resource_entry_disk xml_data_res_entry;
+
+ /* Location and size of metadata resource for the bootable image of the
+ * WIM, or all zeroes if no image is bootable. */
+ struct resource_entry_disk boot_metadata_res_entry;
+
+ /* 1-based index of the bootable image of the WIM, or 0 if no image is
+ * bootable. */
+ u32 boot_idx;