Btrfs: fix removal logic of the tree mod log that leads to use-after-free issues

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / fs / btrfs / extent_io.h

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index f4c1ae1..7514359 100644 (file)
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -308,14 +308,13 @@ static inline void extent_buffer_get(struct extent_buffer *eb)
        atomic_inc(&eb->refs);
 }
 
-int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
-                         unsigned long start,
-                         unsigned long len);
-void read_extent_buffer(struct extent_buffer *eb, void *dst,
+int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
+                        unsigned long start, unsigned long len);
+void read_extent_buffer(const struct extent_buffer *eb, void *dst,
                        unsigned long start,
                        unsigned long len);
-int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst,
-                              unsigned long start,
+int read_extent_buffer_to_user(const struct extent_buffer *eb,
+                              void __user *dst, unsigned long start,
                               unsigned long len);
 void write_extent_buffer(struct extent_buffer *eb, const void *src,
                         unsigned long start, unsigned long len);
@@ -334,10 +333,10 @@ int set_extent_buffer_uptodate(struct extent_buffer *eb);
 int clear_extent_buffer_uptodate(struct extent_buffer *eb);
 int extent_buffer_uptodate(struct extent_buffer *eb);
 int extent_buffer_under_io(struct extent_buffer *eb);
-int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
-                     unsigned long min_len, char **map,
-                     unsigned long *map_start,
-                     unsigned long *map_len);
+int map_private_extent_buffer(const struct extent_buffer *eb,
+                             unsigned long offset, unsigned long min_len,
+                             char **map, unsigned long *map_start,
+                             unsigned long *map_len);
 int extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
 int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
 int extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,