These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / fs / btrfs / extent_io.h

diff --git a/kernel/fs/btrfs/extent_io.h b/kernel/fs/btrfs/extent_io.h
index c668f36..f4c1ae1 100644 (file)
--- a/kernel/fs/btrfs/extent_io.h
+++ b/kernel/fs/btrfs/extent_io.h
@@ -2,6 +2,7 @@
 #define __EXTENTIO__
 
 #include <linux/rbtree.h>
+#include "ulist.h"
 
 /* bits for the extent state */
 #define EXTENT_DIRTY           (1U << 0)
@@ -18,6 +19,7 @@
 #define EXTENT_NEED_WAIT       (1U << 13)
 #define EXTENT_DAMAGED         (1U << 14)
 #define EXTENT_NORESERVE       (1U << 15)
+#define EXTENT_QGROUP_RESERVED (1U << 16)
 #define EXTENT_IOBITS          (EXTENT_LOCKED | EXTENT_WRITEBACK)
 #define EXTENT_CTLBITS         (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
 
@@ -161,6 +163,17 @@ struct extent_buffer {
 #endif
 };
 
+/*
+ * Structure to record how many bytes and which ranges are set/cleared
+ */
+struct extent_changeset {
+       /* How many bytes are set/cleared in this operation */
+       u64 bytes_changed;
+
+       /* Changed ranges */
+       struct ulist *range_changed;
+};
+
 static inline void extent_set_compress_type(unsigned long *bio_flags,
                                            int compress_type)
 {
@@ -210,11 +223,17 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
                   struct extent_state *cached_state);
 int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
                      unsigned bits, gfp_t mask);
+int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+                            unsigned bits, gfp_t mask,
+                            struct extent_changeset *changeset);
 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
                     unsigned bits, int wake, int delete,
                     struct extent_state **cached, gfp_t mask);
 int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
                    unsigned bits, gfp_t mask);
+int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+                          unsigned bits, gfp_t mask,
+                          struct extent_changeset *changeset);
 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
                   unsigned bits, u64 *failed_start,
                   struct extent_state **cached_state, gfp_t mask);