13.06.2017 11:53, Kirill Tkhai пишет:
On 09.06.2017 16:27, Stanislav Kinsburskiy wrote:
Kirill, please, review.
-------- Перенаправленное сообщение --------
Тема: [Devel] [PATCH] fuse: allow to mount if process is in init_user_ns
Дата: Fri, 9 Jun 2017 17:09:49 +0400
От: Stanislav Kinsburskiy <skinsbur...@virtuozzo.com>
Кому: devel@openvz.org
Копия: kt...@virtuozzo.com
Regardless its current VE.
Could you please to write why we need this patch?
Sure.
The initial restriction was to prevent FUSE mount in non-init user
namespace.
Commit 8c6e51363 broke this logic, and this patch bring it back.
Why it's needed: SPFS (NFS migration engine) now works outside
container, but due to restore architecture it belongs to non-root VE.
I.e. it works in "init" namespaces environment, but in container VE and
this patch allows it to mount FUSE.
https://jira.sw.ru/browse/PSBM-67185
Signed-off-by: Stanislav Kinsburskiy <skinsbur...@virtuozzo.com>
---
fs/fuse/inode.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 090a7ab..a8d7924 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1211,7 +1211,8 @@ static int fuse_fill_super(struct super_block *sb, void
*data, int silent)
goto err;
if ((file->f_op != &fuse_dev_operations) ||
- (file->f_cred->user_ns != ve_init_user_ns()))
+ ((file->f_cred->user_ns != &init_user_ns) &&
+ (file->f_cred->user_ns != ve_init_user_ns())))
goto err_fput;
fc = kmalloc(sizeof(*fc), GFP_KERNEL);
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