Btrfs: many file_write fixes, inline data

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8a329d3901a2..f1800008be34 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -73,6 +73,9 @@ struct btrfs_header {
                                (sizeof(struct btrfs_disk_key) + sizeof(u64)))
 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize))
+#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
+                                        sizeof(struct btrfs_item) - \
+                                        sizeof(struct btrfs_file_extent_item))
 
 struct buffer_head;
 /*
@@ -204,8 +207,12 @@ struct btrfs_root_item {
         __le32 refs;
 } __attribute__ ((__packed__));
 
+#define BTRFS_FILE_EXTENT_REG 0
+#define BTRFS_FILE_EXTENT_INLINE 1
+
 struct btrfs_file_extent_item {
         __le64 generation;
+        u8 type;
         /*
          * disk space consumed by the extent, checksum blocks are included
          * in these numbers
@@ -862,6 +869,34 @@ static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
         return (u8 *)l->items;
 }
 
+static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e)
+{
+        return e->type;
+}
+static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e,
+                                              u8 val)
+{
+        e->type = val;
+}
+
+static inline char *btrfs_file_extent_inline_start(struct
+                                                   btrfs_file_extent_item *e)
+{
+        return (char *)(&e->disk_blocknr);
+}
+
+static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
+{
+        return (unsigned long)(&((struct
+                  btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize;
+}
+
+static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e)
+{
+        struct btrfs_file_extent_item *fe = NULL;
+        return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr);
+}
+
 static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
                                                  *e)
 {