[RFC PATCH v4 01/36] fuse-bpf: Update fuse side uapi

Daniel Rosenberg
2024-03-29T01:54:03Z

Adds structures which will be used to inform fuse about what it is being
stacked on top of. Once filters are in place, error_in will inform the
post filter if the backing call returned an error.

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
---
include/uapi/linux/fuse.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index e7418d15fe39..0c0a9a8b5c26 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -654,6 +654,29 @@ struct fuse_entry_out {
struct fuse_attr attr;
};

+#define FUSE_BPF_MAX_ENTRIES 2
+
+enum fuse_bpf_type {
+ FUSE_ENTRY_BACKING = 1,
+ FUSE_ENTRY_BPF = 2,
+ FUSE_ENTRY_REMOVE_BACKING = 3,
+ FUSE_ENTRY_REMOVE_BPF = 4,
+};
+
+#define BPF_FUSE_NAME_MAX 15
+
+struct fuse_bpf_entry_out {
+ uint32_t entry_type;
+ uint32_t unused;
+ union {
+ struct {
+ uint64_t unused2;
+ uint64_t fd;
+ };
+ char name[BPF_FUSE_NAME_MAX + 1];
+ };
+};
+
struct fuse_forget_in {
uint64_t nlookup;
};
--
2.44.0.478.gd926399ef9-goog