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-rw-r--r--include/linux/fs.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1f7aa7a14321..2ec4807d4ea8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2367,6 +2367,15 @@ struct super_operations {
struct shrink_control *);
long (*free_cached_objects)(struct super_block *,
struct shrink_control *);
+ /*
+ * If a filesystem can support graceful removal of a device and
+ * continue read-write operations, implement this callback.
+ *
+ * Return 0 if the filesystem can continue read-write.
+ * Non-zero return value or no such callback means the fs will be shutdown
+ * as usual.
+ */
+ int (*remove_bdev)(struct super_block *sb, struct block_device *bdev);
void (*shutdown)(struct super_block *sb);
};