lkml.org 
[lkml]   [2021]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 7/9] dax: add dax holder helper for filesystems
Date
Add these helper functions, and export them for filesystem use.

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
drivers/dax/super.c | 19 +++++++++++++++++++
include/linux/dax.h | 15 +++++++++++++++
2 files changed, 34 insertions(+)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index a19fcc0a54f3..acbe7078ce4c 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -114,6 +114,25 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev, u64 *start_off)
return dax_dev;
}
EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
+
+void fs_dax_register_holder(struct dax_device *dax_dev, void *holder,
+ const struct dax_holder_operations *ops)
+{
+ dax_set_holder(dax_dev, holder, ops);
+}
+EXPORT_SYMBOL_GPL(fs_dax_register_holder);
+
+void fs_dax_unregister_holder(struct dax_device *dax_dev)
+{
+ dax_set_holder(dax_dev, NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(fs_dax_unregister_holder);
+
+void *fs_dax_get_holder(struct dax_device *dax_dev)
+{
+ return dax_get_holder(dax_dev);
+}
+EXPORT_SYMBOL_GPL(fs_dax_get_holder);
#endif /* CONFIG_BLOCK && CONFIG_FS_DAX */

enum dax_device_flags {
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 500d048d444e..15a0ad4c248d 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -140,6 +140,10 @@ static inline void fs_put_dax(struct dax_device *dax_dev)
{
put_dax(dax_dev);
}
+void fs_dax_register_holder(struct dax_device *dax_dev, void *holder,
+ const struct dax_holder_operations *ops);
+void fs_dax_unregister_holder(struct dax_device *dax_dev);
+void *fs_dax_get_holder(struct dax_device *dax_dev);
#else
static inline int dax_add_host(struct dax_device *dax_dev, struct gendisk *disk)
{
@@ -156,6 +160,17 @@ static inline struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev,
static inline void fs_put_dax(struct dax_device *dax_dev)
{
}
+static inline void fs_dax_register_holder(struct dax_device *dax_dev,
+ void *holder, const struct dax_holder_operations *ops)
+{
+}
+static inline void fs_dax_unregister_holder(struct dax_device *dax_dev)
+{
+}
+static inline void *fs_dax_get_holder(struct dax_device *dax_dev)
+{
+ return NULL;
+}
#endif /* CONFIG_BLOCK && CONFIG_FS_DAX */

#if IS_ENABLED(CONFIG_FS_DAX)
--
2.34.0


\
 
 \ /
  Last update: 2021-12-02 09:50    [W:0.116 / U:2.288 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site