Btrfs: Add mount -o ssd, which includes optimizations for seek free storage

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

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index fa65fe027e45..7a588ba2b747 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -351,6 +351,7 @@ struct btrfs_fs_info {
         spinlock_t delalloc_lock;
         spinlock_t new_trans_lock;
         u64 delalloc_bytes;
+        u64 last_alloc;
 };
 /*
  * in ram representation of the tree.  extent_root is used for all allocations
@@ -444,6 +445,7 @@ struct btrfs_root {
 #define BTRFS_MOUNT_NODATASUM           (1 << 0)
 #define BTRFS_MOUNT_NODATACOW           (1 << 1)
 #define BTRFS_MOUNT_NOBARRIER           (1 << 2)
+#define BTRFS_MOUNT_SSD                 (1 << 3)
 
 #define btrfs_clear_opt(o, opt)         ((o) &= ~BTRFS_MOUNT_##opt)
 #define btrfs_set_opt(o, opt)           ((o) |= BTRFS_MOUNT_##opt)