Btrfs: Add zlib compression support

[linux-2.6-block.git] / fs / btrfs / ordered-data.h

diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index f50f8870a1449801386846b1dd66d6dd4eb068fd..1ef464145d226a509a8f24646e0758e52e18273b 100644 (file)
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -66,6 +66,8 @@ struct btrfs_ordered_sum {
 
 #define BTRFS_ORDERED_NOCOW 2 /* set when we want to write in place */
 
+#define BTRFS_ORDERED_COMPRESSED 3 /* writing a compressed extent */
+
 struct btrfs_ordered_extent {
        /* logical offset in the file */
        u64 file_offset;
@@ -73,9 +75,12 @@ struct btrfs_ordered_extent {
        /* disk byte number */
        u64 start;
 
-       /* length of the extent in bytes */
+       /* ram length of the extent in bytes */
        u64 len;
 
+       /* extent length on disk */
+       u64 disk_len;
+
        /* flags (described above) */
        unsigned long flags;
 
@@ -127,7 +132,8 @@ int btrfs_remove_ordered_extent(struct inode *inode,
 int btrfs_dec_test_ordered_pending(struct inode *inode,
                                       u64 file_offset, u64 io_size);
 int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
-                            u64 start, u64 len, int nocow);
+                            u64 start, u64 len, u64 disk_len, int nocow,
+                            int compressed);
 int btrfs_add_ordered_sum(struct inode *inode,
                          struct btrfs_ordered_extent *entry,
                          struct btrfs_ordered_sum *sum);