[f2fs-dev] [RFC PATCH 8/9] f2fs: allow large folio support to writeable files

From: Nanzhe <[email protected]>

Now we make all write path support large folios,
so we open permission to let writeable file set
large folio mapping.

Signed-off-by: Nanzhe <[email protected]>
---
 fs/f2fs/file.c  | 14 --------------
 fs/f2fs/inode.c |  6 ++----
 2 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c1b3c9d1ab92..bf5497aad1a7 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -87,17 +87,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
 	int err = 0;
 	vm_fault_t ret;
 
-	/*
-	 * We only support large folio on the read case.
-	 * Don't make any dirty pages.
-	 */
-	if (unlikely(IS_IMMUTABLE(inode)) ||
-	    mapping_large_folio_support(inode->i_mapping)) {
-		f2fs_err(sbi, "Not expected: immutable: %d large_folio: %d",
-				IS_IMMUTABLE(inode),
-				mapping_large_folio_support(inode->i_mapping));
-		return VM_FAULT_SIGBUS;
-	}
 
 	if (is_inode_flag_set(inode, FI_COMPRESS_RELEASED)) {
 		err = -EIO;
@@ -650,9 +639,6 @@ static int f2fs_file_open(struct inode *inode, struct file *filp)
 	if (!f2fs_is_compress_backend_ready(inode))
 		return -EOPNOTSUPP;
 
-	if (mapping_large_folio_support(inode->i_mapping) &&
-	    filp->f_mode & FMODE_WRITE)
-		return -EOPNOTSUPP;
 
 	err = fsverity_file_open(inode, filp);
 	if (err)
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index e30f9a2c18b9..2f1ddcaaf5d3 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -581,10 +581,8 @@ static void f2fs_mapping_set_large_folio(struct inode *inode)
 		return;
 	if (f2fs_quota_file(sbi, inode->i_ino))
 		return;
-	if (IS_IMMUTABLE(inode) ||
-	    (f2fs_exist_written_data(sbi, inode->i_ino, LARGE_FOLIO_INO) &&
-	     !(inode->i_mode & S_IWUGO)))
-	    mapping_set_folio_min_order(inode->i_mapping, 0);
+
+	mapping_set_folio_min_order(inode->i_mapping, 0);
 }
 
 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
-- 
2.34.1



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