ve/fs: Allow to mount ext4 in top CT userns
https://jira.sw.ru/browse/PSBM-40100
v2: Check that user_ns is initial for the ve.
v3: Be sure ve->init_cred is set.
Signed-off-by: Kirill Tkhai <ktk...@odin.com>
Acked-by: Vladimir Davydov <vdavy...@virtuozzo.com>
khorenko@: in fact we allowed to do those mounts in top CT user ns only.
(cherry picked from vz7 commit d8aabe8924283e12ef30dee49253f91f33d3e9bc
("ve/fs: Allow to mount ext4 and binfmt_misc under non-root ns"))
Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com>
+++
ve/fs: Allow to mount ext4 in top CT userns - cleanup
After commit d5c3320347bb ("fs/ve: add new FS_VE_MOUNT flag to allow mount
in container init userns") it's wise to use FS_VE_MOUNT flag
instead of generic FS_USERNS_MOUNT + additional per-fs check.
This patch does not change the behavior.
Signed-off-by: Konstantin Khorenko <khore...@virtuozzo.com>
Reviewed-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
fs/ext4/super.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3bc2cfb04518..03ade65fbe51 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -40,6 +40,7 @@
#include <linux/crc16.h>
#include <linux/dax.h>
#include <linux/cleancache.h>
+#include <linux/ve.h>
#include <linux/uaccess.h>
#include <linux/iversion.h>
#include <linux/unicode.h>
@@ -6783,7 +6784,8 @@ static struct file_system_type ext4_fs_type = {
.name = "ext4",
.mount = ext4_mount,
.kill_sb = ext4_kill_sb,
- .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_VIRTUALIZED,
+ .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_VIRTUALIZED |
+ FS_VE_MOUNT,
};
MODULE_ALIAS_FS("ext4");
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