Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / include / linux / dax.h

diff --git a/include/linux/dax.h b/include/linux/dax.h
index e7b8163..ba98533 100644 (file)
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -43,8 +43,21 @@ struct dax_operations {
                        void *addr, size_t bytes, struct iov_iter *iter);
 };
 
+struct dax_holder_operations {
+       /*
+        * notify_failure - notify memory failure into inner holder device
+        * @dax_dev: the dax device which contains the holder
+        * @offset: offset on this dax device where memory failure occurs
+        * @len: length of this memory failure event
+        * @flags: action flags for memory failure handler
+        */
+       int (*notify_failure)(struct dax_device *dax_dev, u64 offset,
+                       u64 len, int mf_flags);
+};
+
 #if IS_ENABLED(CONFIG_DAX)
 struct dax_device *alloc_dax(void *private, const struct dax_operations *ops);
+void *dax_holder(struct dax_device *dax_dev);
 void put_dax(struct dax_device *dax_dev);
 void kill_dax(struct dax_device *dax_dev);
 void dax_write_cache(struct dax_device *dax_dev, bool wc);
@@ -66,6 +79,10 @@ static inline bool daxdev_mapping_supported(struct vm_area_struct *vma,
        return dax_synchronous(dax_dev);
 }
 #else
+static inline void *dax_holder(struct dax_device *dax_dev)
+{
+       return NULL;
+}
 static inline struct dax_device *alloc_dax(void *private,
                const struct dax_operations *ops)
 {
@@ -114,12 +131,9 @@ struct writeback_control;
 #if defined(CONFIG_BLOCK) && defined(CONFIG_FS_DAX)
 int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk);
 void dax_remove_host(struct gendisk *disk);
-struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev,
-               u64 *start_off);
-static inline void fs_put_dax(struct dax_device *dax_dev)
-{
-       put_dax(dax_dev);
-}
+struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev, u64 *start_off,
+               void *holder, const struct dax_holder_operations *ops);
+void fs_put_dax(struct dax_device *dax_dev, void *holder);
 #else
 static inline int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk)
 {
@@ -129,11 +143,12 @@ static inline void dax_remove_host(struct gendisk *disk)
 {
 }
 static inline struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev,
-               u64 *start_off)
+               u64 *start_off, void *holder,
+               const struct dax_holder_operations *ops)
 {
        return NULL;
 }
-static inline void fs_put_dax(struct dax_device *dax_dev)
+static inline void fs_put_dax(struct dax_device *dax_dev, void *holder)
 {
 }
 #endif /* CONFIG_BLOCK && CONFIG_FS_DAX */
@@ -146,6 +161,10 @@ struct page *dax_layout_busy_page(struct address_space *mapping);
 struct page *dax_layout_busy_page_range(struct address_space *mapping, loff_t start, loff_t end);
 dax_entry_t dax_lock_page(struct page *page);
 void dax_unlock_page(struct page *page, dax_entry_t cookie);
+dax_entry_t dax_lock_mapping_entry(struct address_space *mapping,
+               unsigned long index, struct page **page);
+void dax_unlock_mapping_entry(struct address_space *mapping,
+               unsigned long index, dax_entry_t cookie);
 #else
 static inline struct page *dax_layout_busy_page(struct address_space *mapping)
 {
@@ -173,6 +192,17 @@ static inline dax_entry_t dax_lock_page(struct page *page)
 static inline void dax_unlock_page(struct page *page, dax_entry_t cookie)
 {
 }
+
+static inline dax_entry_t dax_lock_mapping_entry(struct address_space *mapping,
+               unsigned long index, struct page **page)
+{
+       return 0;
+}
+
+static inline void dax_unlock_mapping_entry(struct address_space *mapping,
+               unsigned long index, dax_entry_t cookie)
+{
+}
 #endif
 
 int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero,
@@ -203,6 +233,8 @@ size_t dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
                size_t bytes, struct iov_iter *i);
 int dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff,
                        size_t nr_pages);
+int dax_holder_notify_failure(struct dax_device *dax_dev, u64 off, u64 len,
+               int mf_flags);
 void dax_flush(struct dax_device *dax_dev, void *addr, size_t size);
 
 ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
@@ -214,6 +246,14 @@ vm_fault_t dax_finish_sync_fault(struct vm_fault *vmf,
 int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
 int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
                                      pgoff_t index);
+int dax_dedupe_file_range_compare(struct inode *src, loff_t srcoff,
+                                 struct inode *dest, loff_t destoff,
+                                 loff_t len, bool *is_same,
+                                 const struct iomap_ops *ops);
+int dax_remap_file_range_prep(struct file *file_in, loff_t pos_in,
+                             struct file *file_out, loff_t pos_out,
+                             loff_t *len, unsigned int remap_flags,
+                             const struct iomap_ops *ops);
 static inline bool dax_mapping(struct address_space *mapping)
 {
        return mapping->host && IS_DAX(mapping->host);