btrfs-progs: fix error checking in load_device_info

[platform/upstream/btrfs-progs.git] / extent_io.h

diff --git a/extent_io.h b/extent_io.h
index a0308a9..27c4b69 100644 (file)
--- a/extent_io.h
+++ b/extent_io.h
@@ -16,8 +16,8 @@
  * Boston, MA 021110-1307, USA.
  */
 
-#ifndef __EXTENTMAP__
-#define __EXTENTMAP__
+#ifndef __BTRFS_EXTENT_IO_H__
+#define __BTRFS_EXTENT_IO_H__
 
 #if BTRFS_FLAT_INCLUDES
 #include "kerncompat.h"
@@ -39,8 +39,16 @@
 #define EXTENT_DEFRAG_DONE (1 << 7)
 #define EXTENT_BUFFER_FILLED (1 << 8)
 #define EXTENT_CSUM (1 << 9)
+#define EXTENT_BAD_TRANSID (1 << 10)
+#define EXTENT_BUFFER_DUMMY (1 << 11)
 #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
 
+#define BLOCK_GROUP_DATA     EXTENT_WRITEBACK
+#define BLOCK_GROUP_METADATA EXTENT_UPTODATE
+#define BLOCK_GROUP_SYSTEM   EXTENT_NEW
+
+#define BLOCK_GROUP_DIRTY EXTENT_DIRTY
+
 struct btrfs_fs_info;
 
 struct extent_io_tree {
@@ -66,6 +74,7 @@ struct extent_buffer {
        u32 len;
        struct extent_io_tree *tree;
        struct list_head lru;
+       struct list_head recow;
        int refs;
        int flags;
        int fd;
@@ -91,10 +100,28 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start,
                     u64 end, gfp_t mask);
 int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
                       u64 end, gfp_t mask);
-int extent_buffer_uptodate(struct extent_buffer *eb);
-int set_extent_buffer_uptodate(struct extent_buffer *eb);
-int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
-                               struct extent_buffer *eb);
+static inline int set_extent_buffer_uptodate(struct extent_buffer *eb)
+{
+       eb->flags |= EXTENT_UPTODATE;
+       return 0;
+}
+
+static inline int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
+                               struct extent_buffer *eb)
+{
+       eb->flags &= ~EXTENT_UPTODATE;
+       return 0;
+}
+
+static inline int extent_buffer_uptodate(struct extent_buffer *eb)
+{
+       if (!eb || IS_ERR(eb))
+               return 0;
+       if (eb->flags & EXTENT_UPTODATE)
+               return 1;
+       return 0;
+}
+
 int set_state_private(struct extent_io_tree *tree, u64 start, u64 xprivate);
 int get_state_private(struct extent_io_tree *tree, u64 start, u64 *xprivate);
 struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree,
@@ -103,6 +130,7 @@ struct extent_buffer *find_first_extent_buffer(struct extent_io_tree *tree,
                                               u64 start);
 struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
                                          u64 bytenr, u32 blocksize);
+struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
 void free_extent_buffer(struct extent_buffer *eb);
 int read_extent_from_disk(struct extent_buffer *eb,
                          unsigned long offset, unsigned long len);
@@ -116,8 +144,6 @@ void write_extent_buffer(struct extent_buffer *eb, const void *src,
 void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
                        unsigned long dst_offset, unsigned long src_offset,
                        unsigned long len);
-void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
-                         unsigned long src_offset, unsigned long len);
 void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
                           unsigned long src_offset, unsigned long len);
 void memset_extent_buffer(struct extent_buffer *eb, char c,
@@ -126,4 +152,6 @@ int set_extent_buffer_dirty(struct extent_buffer *eb);
 int clear_extent_buffer_dirty(struct extent_buffer *eb);
 int read_data_from_disk(struct btrfs_fs_info *info, void *buf, u64 offset,
                        u64 bytes, int mirror);
+int write_data_to_disk(struct btrfs_fs_info *info, void *buf, u64 offset,
+                      u64 bytes, int mirror);
 #endif