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: I6124ed299baf5e5b8993bb6b54f07bb8771eda8c
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(cherry picked from commit 520a9486182437847212c8e226d042b1e14b7cc2)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index a670702..3d846b0 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1902,7 +1902,13 @@
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;
