Btrfs: Add debugging checks to track down corrupted metadata
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index eb8e455..e9e86fb 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -39,9 +39,10 @@
#include "compat.h"
-static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes,
- struct page **prepared_pages,
- const char __user * buf)
+static int noinline btrfs_copy_from_user(loff_t pos, int num_pages,
+ int write_bytes,
+ struct page **prepared_pages,
+ const char __user * buf)
{
long page_fault = 0;
int i;
@@ -69,7 +70,7 @@
return page_fault ? -EFAULT : 0;
}
-static void btrfs_drop_pages(struct page **pages, size_t num_pages)
+static void noinline btrfs_drop_pages(struct page **pages, size_t num_pages)
{
size_t i;
for (i = 0; i < num_pages; i++) {
@@ -359,7 +360,7 @@
return err;
}
-int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end)
+int noinline btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end)
{
struct extent_map *em;
struct extent_map *split = NULL;
@@ -515,7 +516,7 @@
* it is either truncated or split. Anything entirely inside the range
* is deleted from the tree.
*/
-int btrfs_drop_extents(struct btrfs_trans_handle *trans,
+int noinline btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
u64 start, u64 end, u64 inline_limit, u64 *hint_byte)
{
@@ -785,7 +786,7 @@
/*
* this gets pages into the page cache and locks them down
*/
-static int prepare_pages(struct btrfs_root *root, struct file *file,
+static int noinline prepare_pages(struct btrfs_root *root, struct file *file,
struct page **pages, size_t num_pages,
loff_t pos, unsigned long first_index,
unsigned long last_index, size_t write_bytes)