[PATCH 01/24] fs: add setlease to generic_ro_fops and read-only filesystem directory operations

[Jeff Layton <jlayton@kernel.org>]

Add the setlease file_operation to generic_ro_fops, which covers file
operations for several read-only filesystems (BEFS, EFS, ISOFS, QNX4,
QNX6, CRAMFS, FREEVXFS). Also add setlease to the directory
file_operations for these filesystems.	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 these filesystems.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/befs/linuxvfs.c        | 2 ++
 fs/cramfs/inode.c         | 2 ++
 fs/efs/dir.c              | 2 ++
 fs/freevxfs/vxfs_lookup.c | 2 ++
 fs/isofs/dir.c            | 2 ++
 fs/qnx4/dir.c             | 2 ++
 fs/qnx6/dir.c             | 2 ++
 fs/read_write.c           | 2 ++
 8 files changed, 16 insertions(+)

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 9fcfdd6b8189aaf5cc3b68aa8dff4798af5bdcbc..d7c5d9270387bf6c3e94942e6331b449f90fe428 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -14,6 +14,7 @@
 #include <linux/fs_context.h>
 #include <linux/fs_parser.h>
 #include <linux/errno.h>
+#include <linux/filelock.h>
 #include <linux/stat.h>
 #include <linux/nls.h>
 #include <linux/buffer_head.h>
@@ -79,6 +80,7 @@ static const struct file_operations befs_dir_operations = {
 	.read		= generic_read_dir,
 	.iterate_shared	= befs_readdir,
 	.llseek		= generic_file_llseek,
+	.setlease	= generic_setlease,
 };
 
 static const struct inode_operations befs_dir_inode_operations = {
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index e54ebe402df79d43a2c7cf491d669829f7ef81b7..41b1a869cf135d014003d6bf1c343d590ae7a084 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/file.h>
+#include <linux/filelock.h>
 #include <linux/pagemap.h>
 #include <linux/ramfs.h>
 #include <linux/init.h>
@@ -938,6 +939,7 @@ static const struct file_operations cramfs_directory_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.iterate_shared	= cramfs_readdir,
+	.setlease	= generic_setlease,
 };
 
 static const struct inode_operations cramfs_dir_inode_operations = {
diff --git a/fs/efs/dir.c b/fs/efs/dir.c
index f892ac7c2a35e0094a314eeded06a974154e46d7..35ad0092c11547af68ef8baf4965b50a0a7593fe 100644
--- a/fs/efs/dir.c
+++ b/fs/efs/dir.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/buffer_head.h>
+#include <linux/filelock.h>
 #include "efs.h"
 
 static int efs_readdir(struct file *, struct dir_context *);
@@ -14,6 +15,7 @@ const struct file_operations efs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.iterate_shared	= efs_readdir,
+	.setlease	= generic_setlease,
 };
 
 const struct inode_operations efs_dir_inode_operations = {
diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index 1b0bca8b4cc686043d92246042dcf833d37712e4..138e08de976ea762a46043316f27e9a031f60c32 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -8,6 +8,7 @@
  * Veritas filesystem driver - lookup and other directory related code.
  */
 #include <linux/fs.h>
+#include <linux/filelock.h>
 #include <linux/time.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
@@ -36,6 +37,7 @@ const struct file_operations vxfs_dir_operations = {
 	.llseek =		generic_file_llseek,
 	.read =			generic_read_dir,
 	.iterate_shared =	vxfs_readdir,
+	.setlease =		generic_setlease,
 };
 
 
diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
index 09df40b612fbf27a1a93af2b4fbf6a607f4a1ab4..2ca16c3fe5ef3427e5bbd0631eb8323ef3c58bf1 100644
--- a/fs/isofs/dir.c
+++ b/fs/isofs/dir.c
@@ -12,6 +12,7 @@
  *  isofs directory handling functions
  */
 #include <linux/gfp.h>
+#include <linux/filelock.h>
 #include "isofs.h"
 
 int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode)
@@ -271,6 +272,7 @@ const struct file_operations isofs_dir_operations =
 	.llseek = generic_file_llseek,
 	.read = generic_read_dir,
 	.iterate_shared = isofs_readdir,
+	.setlease = generic_setlease,
 };
 
 /*
diff --git a/fs/qnx4/dir.c b/fs/qnx4/dir.c
index 42a529e26bd68b6de1a7738c409d5942a92066f8..6402715ab377e5686558371dd76e5a4c1cfbb787 100644
--- a/fs/qnx4/dir.c
+++ b/fs/qnx4/dir.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/buffer_head.h>
+#include <linux/filelock.h>
 #include "qnx4.h"
 
 static int qnx4_readdir(struct file *file, struct dir_context *ctx)
@@ -71,6 +72,7 @@ const struct file_operations qnx4_dir_operations =
 	.read		= generic_read_dir,
 	.iterate_shared	= qnx4_readdir,
 	.fsync		= generic_file_fsync,
+	.setlease	= generic_setlease,
 };
 
 const struct inode_operations qnx4_dir_inode_operations =
diff --git a/fs/qnx6/dir.c b/fs/qnx6/dir.c
index b4d10e45f2e41b45568fe813a3cc0aa253bcab6e..ae0c9846833d916beb7f356cfa6e9de01a6f6963 100644
--- a/fs/qnx6/dir.c
+++ b/fs/qnx6/dir.c
@@ -11,6 +11,7 @@
  *
  */
 
+#include <linux/filelock.h>
 #include "qnx6.h"
 
 static unsigned qnx6_lfile_checksum(char *name, unsigned size)
@@ -275,6 +276,7 @@ const struct file_operations qnx6_dir_operations = {
 	.read		= generic_read_dir,
 	.iterate_shared	= qnx6_readdir,
 	.fsync		= generic_file_fsync,
+	.setlease	= generic_setlease,
 };
 
 const struct inode_operations qnx6_dir_inode_operations = {
diff --git a/fs/read_write.c b/fs/read_write.c
index 833bae068770a4e410e4895132586313a9687fa2..50bff7edc91f36fe5ee24198bd51a33c278d40a2 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -20,6 +20,7 @@
 #include <linux/compat.h>
 #include <linux/mount.h>
 #include <linux/fs.h>
+#include <linux/filelock.h>
 #include "internal.h"
 
 #include <linux/uaccess.h>
@@ -30,6 +31,7 @@ const struct file_operations generic_ro_fops = {
 	.read_iter	= generic_file_read_iter,
 	.mmap_prepare	= generic_file_readonly_mmap_prepare,
 	.splice_read	= filemap_splice_read,
+	.setlease	= generic_setlease,
 };
 
 EXPORT_SYMBOL(generic_ro_fops);

-- 
2.52.0