From 2ae4606507f1804b19b369f757a83c324f4246d2 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Thu, 3 May 2018 23:26:02 -0700 Subject: [PATCH] UPSTREAM: f2fs: avoid fsync() failure caused by EAGAIN in writepage() pageout() in MM traslates EAGAIN, so calls handle_write_error() -> mapping_set_error() -> set_bit(AS_EIO, ...). file_write_and_wait_range() will see EIO error, which is critical to return value of fsync() followed by atomic_write failure to user. Change-Id: Ifdd5e09defcf0705901ff7f23001d68a811da3af Signed-off-by: Jaegeuk Kim (cherry picked from commit 1ccd6c4ff9ccd74bb87903067618815d326af242) --- fs/f2fs/data.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 1afce941a9df..c9db73e498a6 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1905,7 +1905,13 @@ out: redirty_out: redirty_page_for_writepage(wbc, page); - if (!err) + /* + * pageout() in MM traslates EAGAIN, so calls handle_write_error() + * -> mapping_set_error() -> set_bit(AS_EIO, ...). + * file_write_and_wait_range() will see EIO error, which is critical + * to return value of fsync() followed by atomic_write failure to user. + */ + if (!err || wbc->for_reclaim) return AOP_WRITEPAGE_ACTIVATE; unlock_page(page); return err; -- 2.20.1