btrfs-progs: image: move metadump definitions to own header

[platform/upstream/btrfs-progs.git] / kernel-lib / raid56.h

diff --git a/kernel-lib/raid56.h b/kernel-lib/raid56.h
index 0d52f3d..56d13f8 100644 (file)
--- a/kernel-lib/raid56.h
+++ b/kernel-lib/raid56.h
@@ -25,4 +25,34 @@
 void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs);
 int raid5_gen_result(int nr_devs, size_t stripe_len, int dest, void **data);
 
+/*
+ * Headers synchronized from kernel include/linux/raid/pq.h
+ * No modification at all.
+ *
+ * Galois field tables.
+ */
+extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
+extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
+extern const u8 raid6_gfexp[256]      __attribute__((aligned(256)));
+extern const u8 raid6_gfinv[256]      __attribute__((aligned(256)));
+extern const u8 raid6_gfexi[256]      __attribute__((aligned(256)));
+
+/* Recover raid6 with 2 data stripes corrupted */
+int raid6_recov_data2(int nr_devs, size_t stripe_len, int dest1, int dest2,
+                     void **data);
+
+/* Recover data and P */
+int raid6_recov_datap(int nr_devs, size_t stripe_len, int dest1, void **data);
+
+/*
+ * Recover raid56 data
+ * @dest1/2 can be -1 to indicate correct data
+ *
+ * Return >0 for unrecoverable case.
+ * Return 0 for recoverable case, And recovered data will be stored into @data
+ * Return <0 for fatal error
+ */
+int raid56_recov(int nr_devs, size_t stripe_len, u64 profile, int dest1,
+                int dest2, void **data);
+
 #endif