linux-kernel - [RFC PATCH 12/12] netfs: Export some read-request ref functions

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Date:   Wed, 21 Jul 2021 14:47:15 +0100
From:   David Howells <dhowells@...hat.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     dhowells@...hat.com, Jeff Layton <jlayton@...hat.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Anna Schumaker <anna.schumaker@...app.com>,
        Steve French <sfrench@...ba.org>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Mike Marshall <hubcap@...ibond.com>,
        David Wysochanski <dwysocha@...hat.com>,
        Shyam Prasad N <nspmangalore@...il.com>,
        Miklos Szeredi <miklos@...redi.hu>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-cachefs@...hat.com, linux-afs@...ts.infradead.org,
        linux-nfs@...r.kernel.org, linux-cifs@...r.kernel.org,
        ceph-devel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net,
        devel@...ts.orangefs.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 12/12] netfs: Export some read-request ref functions

Export some functions for getting/putting read-request structures for use
in later patches.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 fs/netfs/internal.h    |   10 ++++++++++
 fs/netfs/read_helper.c |   15 +++------------
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/fs/netfs/internal.h b/fs/netfs/internal.h
index a9ec6591f90a..6ae1eb55093a 100644
--- a/fs/netfs/internal.h
+++ b/fs/netfs/internal.h
@@ -78,9 +78,19 @@ static inline void netfs_see_write_request(struct netfs_write_request *wreq,
  */
 extern unsigned int netfs_debug;
 
+void __netfs_put_subrequest(struct netfs_read_subrequest *subreq, bool was_async);
+void netfs_put_read_request(struct netfs_read_request *rreq, bool was_async);
+void netfs_rreq_completed(struct netfs_read_request *rreq, bool was_async);
 int netfs_prefetch_for_write(struct file *file, struct page *page, loff_t pos, size_t len,
 			     bool always_fill);
 
+static inline void netfs_put_subrequest(struct netfs_read_subrequest *subreq,
+					bool was_async)
+{
+	if (refcount_dec_and_test(&subreq->usage))
+		__netfs_put_subrequest(subreq, was_async);
+}
+
 /*
  * write_helper.c
  */
diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
index 0b771f2f5449..e5c636acc756 100644
--- a/fs/netfs/read_helper.c
+++ b/fs/netfs/read_helper.c
@@ -28,14 +28,6 @@ MODULE_PARM_DESC(netfs_debug, "Netfs support debugging mask");
 
 static void netfs_rreq_work(struct work_struct *);
 static void netfs_rreq_clear_buffer(struct netfs_read_request *);
-static void __netfs_put_subrequest(struct netfs_read_subrequest *, bool);
-
-static void netfs_put_subrequest(struct netfs_read_subrequest *subreq,
-				 bool was_async)
-{
-	if (refcount_dec_and_test(&subreq->usage))
-		__netfs_put_subrequest(subreq, was_async);
-}
 
 static struct netfs_read_request *netfs_alloc_read_request(struct address_space *mapping,
 							   struct file *file)
@@ -97,7 +89,7 @@ static void netfs_free_read_request(struct work_struct *work)
 	netfs_stat_d(&netfs_n_rh_rreq);
 }
 
-static void netfs_put_read_request(struct netfs_read_request *rreq, bool was_async)
+void netfs_put_read_request(struct netfs_read_request *rreq, bool was_async)
 {
 	if (refcount_dec_and_test(&rreq->usage)) {
 		if (was_async) {
@@ -135,8 +127,7 @@ static void netfs_get_read_subrequest(struct netfs_read_subrequest *subreq)
 	refcount_inc(&subreq->usage);
 }
 
-static void __netfs_put_subrequest(struct netfs_read_subrequest *subreq,
-				   bool was_async)
+void __netfs_put_subrequest(struct netfs_read_subrequest *subreq, bool was_async)
 {
 	struct netfs_read_request *rreq = subreq->rreq;
 
@@ -214,7 +205,7 @@ static void netfs_read_from_server(struct netfs_read_request *rreq,
 /*
  * Release those waiting.
  */
-static void netfs_rreq_completed(struct netfs_read_request *rreq, bool was_async)
+void netfs_rreq_completed(struct netfs_read_request *rreq, bool was_async)
 {
 	trace_netfs_rreq(rreq, netfs_rreq_trace_done);
 	netfs_rreq_clear_subreqs(rreq, was_async);