[PATCH RFC 3/6] exportfs: add open method

Christian Brauner
2024-11-29T13:39:28Z

This allows filesystems such as pidfs to provide their custom open.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
include/linux/exportfs.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index 4cc8801e50e395442f9e3ae69b6c9f04fa590ff9..c69b79b64466d5bc32ffe9b2796a388130fe72d8 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -10,6 +10,7 @@ struct inode;
struct iomap;
struct super_block;
struct vfsmount;
+struct path;

/* limit the handle size to NFSv4 handle size now */
#define MAX_HANDLE_SZ 128
@@ -225,6 +226,9 @@ struct fid {
* is also a directory. In the event that it cannot be found, or storage
* space cannot be allocated, a %ERR_PTR should be returned.
*
+ * open:
+ * Allow filesystems to specify a custom open function.
+ *
* commit_metadata:
* @commit_metadata should commit metadata changes to stable storage.
*
@@ -251,6 +255,7 @@ struct export_operations {
bool write, u32 *device_generation);
int (*commit_blocks)(struct inode *inode, struct iomap *iomaps,
int nr_iomaps, struct iattr *iattr);
+ struct file * (*open)(struct path *path, unsigned int oflags);
#define EXPORT_OP_NOWCC (0x1) /* don't collect v3 wcc data */
#define EXPORT_OP_NOSUBTREECHK (0x2) /* no subtree checking */
#define EXPORT_OP_CLOSE_BEFORE_UNLINK (0x4) /* close files before unlink */

--
2.45.2