Merge tag 'f2fs-for-6.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs fixes from Jaegeuk Kim:

 - fix double-unlock introduced by the recent folio conversion

 - fix stale page content beyond EOF complained by xfstests/generic/363

* tag 'f2fs-for-6.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  f2fs: fix to zero post-eof page
  f2fs: Fix __write_node_folio() conversion

2 files changed, 38 insertions, 1 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 6bd3de64f2a8..696131e655ed 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -35,6 +35,17 @@
 #include <trace/events/f2fs.h>
 #include <uapi/linux/f2fs.h>
 
+static void f2fs_zero_post_eof_page(struct inode *inode, loff_t new_size)
+{
+	loff_t old_size = i_size_read(inode);
+
+	if (old_size >= new_size)
+		return;
+
+	/* zero or drop pages only in range of [old_size, new_size] */
+	truncate_pagecache(inode, old_size);
+}
+
 static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
 {
 	struct inode *inode = file_inode(vmf->vma->vm_file);
@@ -103,8 +114,13 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
 
 	f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
 
+	filemap_invalidate_lock(inode->i_mapping);
+	f2fs_zero_post_eof_page(inode, (folio->index + 1) << PAGE_SHIFT);
+	filemap_invalidate_unlock(inode->i_mapping);
+
 	file_update_time(vmf->vma->vm_file);
 	filemap_invalidate_lock_shared(inode->i_mapping);
+
 	folio_lock(folio);
 	if (unlikely(folio->mapping != inode->i_mapping ||
 			folio_pos(folio) > i_size_read(inode) ||
@@ -1109,6 +1125,8 @@ int f2fs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 		f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
 		filemap_invalidate_lock(inode->i_mapping);
 
+		if (attr->ia_size > old_size)
+			f2fs_zero_post_eof_page(inode, attr->ia_size);
 		truncate_setsize(inode, attr->ia_size);
 
 		if (attr->ia_size <= old_size)
@@ -1227,6 +1245,10 @@ static int f2fs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 	if (ret)
 		return ret;
 
+	filemap_invalidate_lock(inode->i_mapping);
+	f2fs_zero_post_eof_page(inode, offset + len);
+	filemap_invalidate_unlock(inode->i_mapping);
+
 	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
 	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
 
@@ -1510,6 +1532,8 @@ static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 	filemap_invalidate_lock(inode->i_mapping);
 
+	f2fs_zero_post_eof_page(inode, offset + len);
+
 	f2fs_lock_op(sbi);
 	f2fs_drop_extent_tree(inode);
 	truncate_pagecache(inode, offset);
@@ -1631,6 +1655,10 @@ static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
 	if (ret)
 		return ret;
 
+	filemap_invalidate_lock(mapping);
+	f2fs_zero_post_eof_page(inode, offset + len);
+	filemap_invalidate_unlock(mapping);
+
 	pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
 	pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
 
@@ -1762,6 +1790,8 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
 	/* avoid gc operation during block exchange */
 	f2fs_down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 	filemap_invalidate_lock(mapping);
+
+	f2fs_zero_post_eof_page(inode, offset + len);
 	truncate_pagecache(inode, offset);
 
 	while (!ret && idx > pg_start) {
@@ -1819,6 +1849,10 @@ static int f2fs_expand_inode_data(struct inode *inode, loff_t offset,
 	if (err)
 		return err;
 
+	filemap_invalidate_lock(inode->i_mapping);
+	f2fs_zero_post_eof_page(inode, offset + len);
+	filemap_invalidate_unlock(inode->i_mapping);
+
 	f2fs_balance_fs(sbi, true);
 
 	pg_start = ((unsigned long long)offset) >> PAGE_SHIFT;
@@ -4860,6 +4894,10 @@ static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from)
 	err = file_modified(file);
 	if (err)
 		return err;
+
+	filemap_invalidate_lock(inode->i_mapping);
+	f2fs_zero_post_eof_page(inode, iocb->ki_pos + iov_iter_count(from));
+	filemap_invalidate_unlock(inode->i_mapping);
 	return count;
 }
 
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 1cb4cba7f961..bfe104db284e 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2078,7 +2078,6 @@ write_node:
 
 			if (!__write_node_folio(folio, false, &submitted,
 					wbc, do_balance, io_type, NULL)) {
-				folio_unlock(folio);
 				folio_batch_release(&fbatch);
 				ret = -EIO;
 				goto out;