linux-kernel - [PATCH 19/24] tmpfs: add setlease file operation

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Message-Id: <20260108-setlease-6-20-v1-19-ea4dec9b67fa@kernel.org>
Date: Thu, 08 Jan 2026 12:13:14 -0500
From: Jeff Layton <jlayton@...nel.org>
To: Luis de Bethencourt <luisbg@...nel.org>, 
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Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
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 Jeff Layton <jlayton@...nel.org>
Subject: [PATCH 19/24] tmpfs: add setlease file operation

Add the setlease file_operation pointing to generic_setlease to the
tmpfs file_operations structures. A future patch will change the
default behavior to reject lease attempts with -EINVAL when there is no
setlease file operation defined. Add generic_setlease to retain the
ability to set leases on this filesystem.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 fs/libfs.c | 2 ++
 mm/shmem.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fs/libfs.c b/fs/libfs.c
index 591eb649ebbacf202ff48cd3abd64a175daa291c..697c6d5fc12786c036f0086886297fb5cd52ae00 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -6,6 +6,7 @@
 
 #include <linux/blkdev.h>
 #include <linux/export.h>
+#include <linux/filelock.h>
 #include <linux/pagemap.h>
 #include <linux/slab.h>
 #include <linux/cred.h>
@@ -570,6 +571,7 @@ const struct file_operations simple_offset_dir_operations = {
 	.iterate_shared	= offset_readdir,
 	.read		= generic_read_dir,
 	.fsync		= noop_fsync,
+	.setlease	= generic_setlease,
 };
 
 struct dentry *find_next_child(struct dentry *parent, struct dentry *prev)
diff --git a/mm/shmem.c b/mm/shmem.c
index ec6c01378e9d2bd47db9d7506e4d6a565e092185..88ef1fd5cd38efedbb31353da2871ab1d47e68a5 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -29,6 +29,7 @@
 #include <linux/pagemap.h>
 #include <linux/file.h>
 #include <linux/fileattr.h>
+#include <linux/filelock.h>
 #include <linux/mm.h>
 #include <linux/random.h>
 #include <linux/sched/signal.h>
@@ -5219,6 +5220,7 @@ static const struct file_operations shmem_file_operations = {
 	.splice_read	= shmem_file_splice_read,
 	.splice_write	= iter_file_splice_write,
 	.fallocate	= shmem_fallocate,
+	.setlease	= generic_setlease,
 #endif
 };
 

-- 
2.52.0