From: Chengguang Xu <cgxu519@mykernel.net>
To: miklos@szeredi.hu
Cc: linux-unionfs@vger.kernel.org, Chengguang Xu <cgxu519@mykernel.net>
Subject: [RFC PATCH 1/2] ovl: skip checking lower file's write permisson on truncate
Date: Sat, 24 Apr 2021 22:03:15 +0800 [thread overview]
Message-ID: <20210424140316.485444-1-cgxu519@mykernel.net> (raw)
Lower files may be shared in overlayfs so strictly checking write
perssmion on lower file will cause interferes between different
overlayfs instances.
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
---
fs/overlayfs/inode.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 28c71978eb2e..17d1add0af1a 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -31,12 +31,6 @@ int ovl_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
goto out;
if (attr->ia_valid & ATTR_SIZE) {
- struct inode *realinode = d_inode(ovl_dentry_real(dentry));
-
- err = -ETXTBSY;
- if (atomic_read(&realinode->i_writecount) < 0)
- goto out_drop_write;
-
/* Truncate should trigger data copy up as well */
full_copy_up = true;
}
--
2.27.0
next reply other threads:[~2021-04-24 14:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-24 14:03 Chengguang Xu [this message]
2021-04-24 14:03 ` [RFC PATCH 2/2] ovl: enhance write permission check for writable open Chengguang Xu
2021-07-21 13:14 ` Miklos Szeredi
2021-04-28 12:18 ` 回复:[RFC PATCH 1/2] ovl: skip checking lower file's write permisson on truncate Chengguang Xu
2021-07-20 14:35 ` [RFC " Miklos Szeredi
2021-07-20 15:19 ` Miklos Szeredi
2021-07-20 16:01 ` Chengguang Xu
2021-07-20 16:01 ` Miklos Szeredi
2021-07-20 16:04 ` Chengguang Xu
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