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Subject[PATCH v4 05/16] fuse: export fuse_len_args()
Date
From: Stefan Hajnoczi <stefanha@redhat.com>

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

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
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
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