mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
64 lines
2.4 KiB
Diff
64 lines
2.4 KiB
Diff
|
From 93c33e6a7f3b0aef99d02252e6232a3d8b80f2d5 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
Date: Sun, 21 Jan 2018 15:47:50 +0100
|
||
|
|
Subject: ubifs: Add option to create UBI FS version 4 on empty UBI volume
|
||
|
|
|
||
|
|
Instead of creating an ubifs file system with format version 5 by
|
||
|
|
default on empty UBI volumes add a compile option to create an older ubi
|
||
|
|
with file system format version 4 instated. This allows it to be mount
|
||
|
|
as a volume on kernel versions < 4.10, which does not support format
|
||
|
|
version 5.
|
||
|
|
We saw that some people can not access their older data when they
|
||
|
|
downgraded from kernel 4.14 to kernel 4.9 to prevent this this option
|
||
|
|
would help.
|
||
|
|
|
||
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
---
|
||
|
|
fs/ubifs/Kconfig | 13 +++++++++++++
|
||
|
|
fs/ubifs/sb.c | 6 ++++++
|
||
|
|
2 files changed, 19 insertions(+)
|
||
|
|
|
||
|
|
--- a/fs/ubifs/Kconfig
|
||
|
|
+++ b/fs/ubifs/Kconfig
|
||
|
|
@@ -74,3 +74,16 @@ config UBIFS_FS_SECURITY
|
||
|
|
the extended attribute support in advance.
|
||
|
|
|
||
|
|
If you are not using a security module, say N.
|
||
|
|
+
|
||
|
|
+config UBIFS_FS_FORMAT4
|
||
|
|
+ bool "Use file system format version 4 for new file systems"
|
||
|
|
+ depends on UBIFS_FS
|
||
|
|
+ help
|
||
|
|
+ Instead of creating new file systems with the new ubifs file
|
||
|
|
+ system version 5, use the old format version 4 for implicitly
|
||
|
|
+ by the driver created file systems on an empty UBI volume. This
|
||
|
|
+ makes it possible to mount these file systems also with kernel
|
||
|
|
+ versions before 4.10. The driver will still support file system
|
||
|
|
+ format version 5 for ubifs file systems created with version 5.
|
||
|
|
+
|
||
|
|
+ If you are unsure, say N.
|
||
|
|
--- a/fs/ubifs/sb.c
|
||
|
|
+++ b/fs/ubifs/sb.c
|
||
|
|
@@ -176,7 +176,9 @@ static int create_default_filesystem(str
|
||
|
|
tmp64 = (long long)max_buds * c->leb_size;
|
||
|
|
if (big_lpt)
|
||
|
|
sup_flags |= UBIFS_FLG_BIGLPT;
|
||
|
|
+#ifndef CONFIG_UBIFS_FS_FORMAT4
|
||
|
|
sup_flags |= UBIFS_FLG_DOUBLE_HASH;
|
||
|
|
+#endif
|
||
|
|
|
||
|
|
sup->ch.node_type = UBIFS_SB_NODE;
|
||
|
|
sup->key_hash = UBIFS_KEY_HASH_R5;
|
||
|
|
@@ -192,7 +194,11 @@ static int create_default_filesystem(str
|
||
|
|
sup->jhead_cnt = cpu_to_le32(DEFAULT_JHEADS_CNT);
|
||
|
|
sup->fanout = cpu_to_le32(DEFAULT_FANOUT);
|
||
|
|
sup->lsave_cnt = cpu_to_le32(c->lsave_cnt);
|
||
|
|
+#ifdef CONFIG_UBIFS_FS_FORMAT4
|
||
|
|
+ sup->fmt_version = cpu_to_le32(4);
|
||
|
|
+#else
|
||
|
|
sup->fmt_version = cpu_to_le32(UBIFS_FORMAT_VERSION);
|
||
|
|
+#endif
|
||
|
|
sup->time_gran = cpu_to_le32(DEFAULT_TIME_GRAN);
|
||
|
|
if (c->mount_opts.override_compr)
|
||
|
|
sup->default_compr = cpu_to_le16(c->mount_opts.compr_type);
|