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From: Bernd Schubert <bschubert@ddn.com>
Date: Thu, 23 Jan 2025 15:51:07 +0100
Subject: [PATCH v11 08/18] fuse: Add fuse-io-uring handling into fuse_copy
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Add special fuse-io-uring into the fuse argument
copy handler.
Signed-off-by: Bernd Schubert <bschubert@ddn.com>
Reviewed-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
fs/fuse/dev.c | 12 +++++++++++-
fs/fuse/fuse_dev_i.h | 4 ++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 6ee7e28a84c80a3e7c8dc933986c0388371ff6cd..8b03a540e151daa1f62986aa79030e9e7a456059 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -786,6 +786,9 @@ static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size)
*size -= ncpy;
cs->len -= ncpy;
cs->offset += ncpy;
+ if (cs->is_uring)
+ cs->ring.copied_sz += ncpy;
+
return ncpy;
}
@@ -1922,7 +1925,14 @@ static struct fuse_req *request_find(struct fuse_pqueue *fpq, u64 unique)
int fuse_copy_out_args(struct fuse_copy_state *cs, struct fuse_args *args,
unsigned nbytes)
{
- unsigned reqsize = sizeof(struct fuse_out_header);
+
+ unsigned int reqsize = 0;
+
+ /*
+ * Uring has all headers separated from args - args is payload only
+ */
+ if (!cs->is_uring)
+ reqsize = sizeof(struct fuse_out_header);
reqsize += fuse_len_args(args->out_numargs, args->out_args);
diff --git a/fs/fuse/fuse_dev_i.h b/fs/fuse/fuse_dev_i.h
index 21eb1bdb492d04f0a406d25bb8d300b34244dce2..4a8a4feb2df53fb84938a6711e6bcfd0f1b9f615 100644
--- a/fs/fuse/fuse_dev_i.h
+++ b/fs/fuse/fuse_dev_i.h
@@ -27,6 +27,10 @@ struct fuse_copy_state {
unsigned int len;
unsigned int offset;
unsigned int move_pages:1;
+ unsigned int is_uring:1;
+ struct {
+ unsigned int copied_sz; /* copied size into the user buffer */
+ } ring;
};
static inline struct fuse_dev *fuse_get_dev(struct file *file)
--
2.43.0