5 files changed, 16 insertions, 4 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8e948ec1ee6b..300628795fdb 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2549,7 +2549,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
 int btrfs_readpage(struct file *file, struct page *page);
 void btrfs_evict_inode(struct inode *inode);
 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
-void btrfs_dirty_inode(struct inode *inode);
+void btrfs_dirty_inode(struct inode *inode, int flags);
 struct inode *btrfs_alloc_inode(struct super_block *sb);
 void btrfs_destroy_inode(struct inode *inode);
 int btrfs_drop_inode(struct inode *inode);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index b181a94a7170..7055d11c1efd 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -10,6 +10,8 @@
 #include <linux/swap.h>
 #include <linux/writeback.h>
 #include <linux/pagevec.h>
+#include <linux/prefetch.h>
+#include <linux/cleancache.h>
 #include "extent_io.h"
 #include "extent_map.h"
 #include "compat.h"
@@ -1969,6 +1971,13 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
 
         set_page_extent_mapped(page);
 
+        if (!PageUptodate(page)) {
+                if (cleancache_get_page(page) == 0) {
+                        BUG_ON(blocksize != PAGE_SIZE);
+                        goto out;
+                }
+        }
+
         end = page_end;
         while (1) {
                 lock_extent(tree, start, end, GFP_NOFS);
@@ -2102,6 +2111,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
                 cur = cur + iosize;
                 pg_offset += iosize;
         }
+out:
         if (!nr) {
                 if (!PageError(page))
                         SetPageUptodate(page);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5813dec5101c..0a9b10c5b0a7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4291,7 +4291,7 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
  * FIXME, needs more benchmarking...there are no reasons other than performance
  * to keep or drop this code.
  */
-void btrfs_dirty_inode(struct inode *inode)
+void btrfs_dirty_inode(struct inode *inode, int flags)
 {
         struct btrfs_root *root = BTRFS_I(inode)->root;
         struct btrfs_trans_handle *trans;
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 086b1e6b8614..5e0a3dc79a45 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -712,7 +712,7 @@ again:
         WARN_ON(cur->checked);
         if (!list_empty(&cur->upper)) {
                 /*
-                 * the backref was added previously when processsing
+                 * the backref was added previously when processing
                  * backref of type BTRFS_TREE_BLOCK_REF_KEY
                  */
                 BUG_ON(!list_is_singular(&cur->upper));
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3559d0b3518a..0bb4ebbb71b7 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -39,6 +39,7 @@
 #include <linux/miscdevice.h>
 #include <linux/magic.h>
 #include <linux/slab.h>
+#include <linux/cleancache.h>
 #include "compat.h"
 #include "delayed-inode.h"
 #include "ctree.h"
@@ -638,6 +639,7 @@ static int btrfs_fill_super(struct super_block *sb,
         sb->s_root = root_dentry;
 
         save_mount_options(sb, data);
+        cleancache_init_fs(sb);
         return 0;
 
 fail_close:
@@ -823,7 +825,7 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
         } else {
                 char b[BDEVNAME_SIZE];
 
-                s->s_flags = flags;
+                s->s_flags = flags | MS_NOSEC;
                 strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
                 error = btrfs_fill_super(s, fs_devices, data,
                                          flags & MS_SILENT ? 1 : 0);