From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Thu, 21 Jul 2022 19:41:29 +0000 (-0400)
Subject: bcachefs: Add an O_DIRECT option (for userspace)
X-Git-Tag: v6.7-rc1~201^2~857
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=91f1b9fdd2c02a7375e46bb2628870f3c6116072;p=thirdparty%2Fkernel%2Flinux.git

bcachefs: Add an O_DIRECT option (for userspace)

Sometimes we see IO errors due to O_DIRECT alignment issues - having an
option to use buffered IO will be helpful.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
---

diff --git a/fs/bcachefs/opts.h b/fs/bcachefs/opts.h
index 30cf9a2d9dc1a..6e2bd6e01f8cc 100644
--- a/fs/bcachefs/opts.h
+++ b/fs/bcachefs/opts.h
@@ -346,6 +346,11 @@ enum opt_type {
 	  OPT_BOOL(),							\
 	  BCH2_NO_SB_OPT,		false,				\
 	  NULL,		"Don't open device in exclusive mode")		\
+	x(direct_io,			u8,				\
+	  OPT_FS|OPT_MOUNT,						\
+	  OPT_BOOL(),							\
+	  BCH2_NO_SB_OPT,			true,			\
+	  NULL,		"Use O_DIRECT (userspace only)")		\
 	x(sb,				u64,				\
 	  OPT_MOUNT,							\
 	  OPT_UINT(0, S64_MAX),						\