[PATCH v4 05/16] fuse: export fuse_len_args()

[Miklos Szeredi]

From: Stefan Hajnoczi <stefanha@xxxxxxxxxx>

virtio-fs will need to query the length of fuse_arg lists.  Make the symbol
visible.

Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
 fs/fuse/dev.c    | 7 ++++---
 fs/fuse/fuse_i.h | 5 +++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 137b3de511ac..985654560d1a 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -350,7 +350,7 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req)
 }
 EXPORT_SYMBOL_GPL(fuse_put_request);
 
-static unsigned len_args(unsigned numargs, struct fuse_arg *args)
+unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args)
 {
 	unsigned nbytes = 0;
 	unsigned i;
@@ -360,6 +360,7 @@ static unsigned len_args(unsigned numargs, struct fuse_arg *args)
 
 	return nbytes;
 }
+EXPORT_SYMBOL_GPL(fuse_len_args);
 
 static u64 fuse_get_unique(struct fuse_iqueue *fiq)
 {
@@ -375,7 +376,7 @@ static unsigned int fuse_req_hash(u64 unique)
 static void queue_request(struct fuse_iqueue *fiq, struct fuse_req *req)
 {
 	req->in.h.len = sizeof(struct fuse_in_header) +
-		len_args(req->in.numargs, (struct fuse_arg *) req->in.args);
+		fuse_len_args(req->in.numargs, (struct fuse_arg *) req->in.args);
 	list_add_tail(&req->list, &fiq->pending);
 	wake_up_locked(&fiq->waitq);
 	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
@@ -1912,7 +1913,7 @@ static int copy_out_args(struct fuse_copy_state *cs, struct fuse_out *out,
 	if (out->h.error)
 		return nbytes != reqsize ? -EINVAL : 0;
 
-	reqsize += len_args(out->numargs, out->args);
+	reqsize += fuse_len_args(out->numargs, out->args);
 
 	if (reqsize < nbytes || (reqsize > nbytes && !out->argvar))
 		return -EINVAL;
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 67521103d3b2..81e436c9620a 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -1098,4 +1098,9 @@ int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 /* readdir.c */
 int fuse_readdir(struct file *file, struct dir_context *ctx);
 
+/**
+ * Return the number of bytes in an arguments list
+ */
+unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args);
+
 #endif /* _FS_FUSE_I_H */
-- 
2.21.0