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From:   "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
To:     linux-ext4@vger.kernel.org, Matthew Wilcox <willy@infradead.org>
Cc:     linux-fsdevel@vger.kernel.org,
        Ojaswin Mujoo <ojaswin@linux.ibm.com>,
        Disha Goel <disgoel@linux.ibm.com>,
        "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Subject: [RFCv2 5/5] ext4: Make ext4_write_inline_data_end() use folio
Date:   Mon, 15 May 2023 16:10:44 +0530
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ext4_write_inline_data_end() is completely converted to work with folio.
Also all callers of ext4_write_inline_data_end() already works on folio
except ext4_da_write_end(). Mostly for consistency and saving few
instructions maybe, this patch just converts ext4_da_write_end() to work
with folio which makes the last caller of ext4_write_inline_data_end()
also converted to work with folio.
We then make ext4_write_inline_data_end() take folio instead of page.

Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
 fs/ext4/ext4.h   |  6 ++----
 fs/ext4/inline.c |  3 +--
 fs/ext4/inode.c  | 23 ++++++++++++++---------
 3 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f9a58251ccea..19e3a880ea16 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3477,10 +3477,8 @@ extern int ext4_try_to_write_inline_data(struct address_space *mapping,
 					 struct inode *inode,
 					 loff_t pos, unsigned len,
 					 struct page **pagep);
-extern int ext4_write_inline_data_end(struct inode *inode,
-				      loff_t pos, unsigned len,
-				      unsigned copied,
-				      struct page *page);
+int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
+			       unsigned copied, struct folio *folio);
 extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
 					   struct inode *inode,
 					   loff_t pos, unsigned len,
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index c0b2dc6514b2..f48183f91c87 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -741,9 +741,8 @@ int ext4_try_to_write_inline_data(struct address_space *mapping,
 }
 
 int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len,
-			       unsigned copied, struct page *page)
+			       unsigned copied, struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
 	handle_t *handle = ext4_journal_current_handle();
 	int no_expand;
 	void *kaddr;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bd827af19b55..3988e0be1270 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1287,7 +1287,8 @@ static int ext4_write_end(struct file *file,
 
 	if (ext4_has_inline_data(inode) &&
 	    ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))
-		return ext4_write_inline_data_end(inode, pos, len, copied, page);
+		return ext4_write_inline_data_end(inode, pos, len, copied,
+						  folio);
 
 	copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
 	/*
@@ -1395,7 +1396,8 @@ static int ext4_journalled_write_end(struct file *file,
 	BUG_ON(!ext4_handle_valid(handle));
 
 	if (ext4_has_inline_data(inode))
-		return ext4_write_inline_data_end(inode, pos, len, copied, page);
+		return ext4_write_inline_data_end(inode, pos, len, copied,
+						  folio);
 
 	if (unlikely(copied < len) && !folio_test_uptodate(folio)) {
 		copied = 0;
@@ -2942,15 +2944,15 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
  * Check if we should update i_disksize
  * when write to the end of file but not require block allocation
  */
-static int ext4_da_should_update_i_disksize(struct page *page,
+static int ext4_da_should_update_i_disksize(struct folio *folio,
 					    unsigned long offset)
 {
 	struct buffer_head *bh;
-	struct inode *inode = page->mapping->host;
+	struct inode *inode = folio->mapping->host;
 	unsigned int idx;
 	int i;
 
-	bh = page_buffers(page);
+	bh = folio_buffers(folio);
 	idx = offset >> inode->i_blkbits;
 
 	for (i = 0; i < idx; i++)
@@ -2970,17 +2972,19 @@ static int ext4_da_write_end(struct file *file,
 	loff_t new_i_size;
 	unsigned long start, end;
 	int write_mode = (int)(unsigned long)fsdata;
+	struct folio *folio = page_folio(page);
 
 	if (write_mode == FALL_BACK_TO_NONDELALLOC)
 		return ext4_write_end(file, mapping, pos,
-				      len, copied, page, fsdata);
+				      len, copied, &folio->page, fsdata);
 
 	trace_ext4_da_write_end(inode, pos, len, copied);
 
 	if (write_mode != CONVERT_INLINE_DATA &&
 	    ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) &&
 	    ext4_has_inline_data(inode))
-		return ext4_write_inline_data_end(inode, pos, len, copied, page);
+		return ext4_write_inline_data_end(inode, pos, len, copied,
+						  folio);
 
 	if (unlikely(copied < len) && !PageUptodate(page))
 		copied = 0;
@@ -3004,10 +3008,11 @@ static int ext4_da_write_end(struct file *file,
 	 */
 	new_i_size = pos + copied;
 	if (copied && new_i_size > inode->i_size &&
-	    ext4_da_should_update_i_disksize(page, end))
+	    ext4_da_should_update_i_disksize(folio, end))
 		ext4_update_i_disksize(inode, new_i_size);
 
-	return generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+	return generic_write_end(file, mapping, pos, len, copied, &folio->page,
+				 fsdata);
 }
 
 /*
-- 
2.40.1