[Devel] [PATCH rh7] fs: Allow to mount ext4 and binfmt_misc under non-root user ns

[Kirill Tkhai]

https://jira.sw.ru/browse/PSBM-40100

Signed-off-by: Kirill Tkhai <ktkhai at odin.com>
---
 fs/binfmt_misc.c |    2 +-
 fs/ext4/super.c  |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 90c306e..2be9b62 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -748,7 +748,7 @@ static struct file_system_type bm_fs_type = {
 	.name		= "binfmt_misc",
 	.mount		= bm_mount,
 	.kill_sb	= kill_litter_super,
-	.fs_flags	= FS_VIRTUALIZED,
+	.fs_flags	= FS_VIRTUALIZED | FS_USERNS_MOUNT,
 };
 MODULE_ALIAS_FS("binfmt_misc");
 
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 5209777..2193000 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5727,7 +5727,8 @@ static struct file_system_type ext4_fs_type = {
 	.mount		= ext4_mount,
 	.kill_sb	= ext4_kill_sb,
 	.fs_flags	= FS_REQUIRES_DEV | FS_HAS_INVALIDATE_RANGE |
-			  FS_VIRTUALIZED | FS_HAS_MMAP_PREP,
+			  FS_VIRTUALIZED | FS_HAS_MMAP_PREP | FS_USERNS_MOUNT |
+			  FS_USERNS_DEV_MOUNT,
 };
 MODULE_ALIAS_FS("ext4");