From dd181c653b4e013e5844fd9ce0a836893092210a Mon Sep 17 00:00:00 2001
From: Satadru Pramanik <satadru@gmail.com>
Date: Wed, 27 Apr 2022 15:54:17 -0400
Subject: [PATCH] Linux 5.18 compat: replace __set_page_dirty_nobuffers

Replace __set_page_dirty_nobuffers with filemap_dirty_folio.

Upstream-commit: 6b1f86f8e9c7f9de7ca1cb987b2cf25e99b1ae3a
("Merge tag 'folio-5.18b' of
git://git.infradead.org/users/willy/pagecache ")

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Authored-by: Satadru Pramanik <satadru@gmail.com>
Signed-off-by: Satadru Pramanik <satadru@gmail.com>
Closes #13325
Closes #13380
---
 config/kernel-vfs-filemap_dirty_folio.m4 | 30 ++++++++++++++++++++++++
 config/kernel.m4                         |  2 ++
 module/os/linux/zfs/zfs_vnops_os.c       |  4 ++++
 module/os/linux/zfs/zpl_file.c           |  9 ++++++-
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 config/kernel-vfs-filemap_dirty_folio.m4

diff --git a/config/kernel-vfs-filemap_dirty_folio.m4 b/config/kernel-vfs-filemap_dirty_folio.m4
new file mode 100644
index 000000000000..872879002928
--- /dev/null
+++ b/config/kernel-vfs-filemap_dirty_folio.m4
@@ -0,0 +1,30 @@
+dnl #
+dnl # Linux 5.18 uses filemap_dirty_folio in lieu of
+dnl # ___set_page_dirty_nobuffers
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_FILEMAP_DIRTY_FOLIO], [
+	ZFS_LINUX_TEST_SRC([vfs_has_filemap_dirty_folio], [
+		#include <linux/pagemap.h>
+		#include <linux/writeback.h>
+
+		static const struct address_space_operations
+		    aops __attribute__ ((unused)) = {
+			.dirty_folio	= filemap_dirty_folio,
+		};
+	],[])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_VFS_FILEMAP_DIRTY_FOLIO], [
+	dnl #
+	dnl # Linux 5.18 uses filemap_dirty_folio in lieu of
+	dnl # ___set_page_dirty_nobuffers
+	dnl #
+	AC_MSG_CHECKING([filemap_dirty_folio exists])
+	ZFS_LINUX_TEST_RESULT([vfs_has_filemap_dirty_folio], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE(HAVE_VFS_FILEMAP_DIRTY_FOLIO, 1,
+			[filemap_dirty_folio exists])
+	],[
+		AC_MSG_RESULT([no])
+	])
+])
diff --git a/config/kernel.m4 b/config/kernel.m4
index 43208940763e..a70db91a8364 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -101,6 +101,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_SET_NLINK
 	ZFS_AC_KERNEL_SRC_SGET
 	ZFS_AC_KERNEL_SRC_LSEEK_EXECUTE
+	ZFS_AC_KERNEL_SRC_VFS_FILEMAP_DIRTY_FOLIO
 	ZFS_AC_KERNEL_SRC_VFS_GETATTR
 	ZFS_AC_KERNEL_SRC_VFS_FSYNC_2ARGS
 	ZFS_AC_KERNEL_SRC_VFS_ITERATE
@@ -217,6 +218,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_SET_NLINK
 	ZFS_AC_KERNEL_SGET
 	ZFS_AC_KERNEL_LSEEK_EXECUTE
+	ZFS_AC_KERNEL_VFS_FILEMAP_DIRTY_FOLIO
 	ZFS_AC_KERNEL_VFS_GETATTR
 	ZFS_AC_KERNEL_VFS_FSYNC_2ARGS
 	ZFS_AC_KERNEL_VFS_ITERATE
diff --git a/module/os/linux/zfs/zfs_vnops_os.c b/module/os/linux/zfs/zfs_vnops_os.c
index b65728f0d4c4..2ba90d889369 100644
--- a/module/os/linux/zfs/zfs_vnops_os.c
+++ b/module/os/linux/zfs/zfs_vnops_os.c
@@ -3556,7 +3556,11 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc)
 			dmu_tx_wait(tx);
 
 		dmu_tx_abort(tx);
+#ifdef HAVE_VFS_FILEMAP_DIRTY_FOLIO
+		filemap_dirty_folio(page_mapping(pp), page_folio(pp));
+#else
 		__set_page_dirty_nobuffers(pp);
+#endif
 		ClearPageError(pp);
 		end_page_writeback(pp);
 		zfs_rangelock_exit(lr);
diff --git a/module/os/linux/zfs/zpl_file.c b/module/os/linux/zfs/zpl_file.c
index 3307c9c3a203..78cf7e7ef10e 100644
--- a/module/os/linux/zfs/zpl_file.c
+++ b/module/os/linux/zfs/zpl_file.c
@@ -33,9 +33,13 @@
 #include <sys/zfs_vfsops.h>
 #include <sys/zfs_vnops.h>
 #include <sys/zfs_project.h>
-#ifdef HAVE_VFS_SET_PAGE_DIRTY_NOBUFFERS
+#if defined(HAVE_VFS_SET_PAGE_DIRTY_NOBUFFERS) || \
+    defined(HAVE_VFS_FILEMAP_DIRTY_FOLIO)
 #include <linux/pagemap.h>
 #endif
+#ifdef HAVE_VFS_FILEMAP_DIRTY_FOLIO
+#include <linux/writeback.h>
+#endif
 
 /*
  * When using fallocate(2) to preallocate space, inflate the requested
@@ -1166,6 +1170,9 @@ const struct address_space_operations zpl_address_space_operations = {
 #ifdef HAVE_VFS_SET_PAGE_DIRTY_NOBUFFERS
 	.set_page_dirty = __set_page_dirty_nobuffers,
 #endif
+#ifdef HAVE_VFS_FILEMAP_DIRTY_FOLIO
+	.dirty_folio	= filemap_dirty_folio,
+#endif
 };
 
 const struct file_operations zpl_file_operations = {