4.17-stable review patch. If anyone has any objections, please let me know.
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From: Jaegeuk Kim jaegeuk@kernel.org
[ Upstream commit 5b19d284f5195a925dd015a6397bfce184097378 ]
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.
Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/f2fs/data.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
--- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1848,7 +1848,13 @@ 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;