From: Vivek Goyal <vgoyal@redhat.com>
To: linux-unionfs@vger.kernel.org
Cc: amir73il@gmail.com, miklos@szeredi.hu, vgoyal@redhat.com,
ebiederm@xmission.com
Subject: [PATCH 9/9] ovl: Return lower dentry if only metadata copy up took place
Date: Tue, 10 Oct 2017 11:32:24 -0400 [thread overview]
Message-ID: <1507649544-4539-10-git-send-email-vgoyal@redhat.com> (raw)
In-Reply-To: <1507649544-4539-1-git-send-email-vgoyal@redhat.com>
Upper dentry inode does not have data. So return lower dentry if upper
is only a metadata copy.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
fs/overlayfs/super.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 6f4c32e49298..fa9d0032fd03 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -101,10 +101,14 @@ static struct dentry *ovl_d_real(struct dentry *dentry,
err = ovl_check_append_only(d_inode(real), open_flags);
if (err)
return ERR_PTR(err);
+
+ if (ovl_test_flag(OVL_METACOPY, d_inode(dentry)))
+ goto lower;
}
return real;
}
+lower:
real = ovl_dentry_lower(dentry);
if (!real)
goto bug;
--
2.13.5
prev parent reply other threads:[~2017-10-10 15:32 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-10 15:32 [RFC PATCH 0/9][V3] overlayfs: Delayed copy up of data Vivek Goyal
2017-10-10 15:32 ` [PATCH 1/9] ovl: ovl_check_setxattr() get rid of redundant -EOPNOTSUPP check Vivek Goyal
2017-10-10 15:32 ` [PATCH 2/9] ovl: During copy up, first copy up metadata and then data Vivek Goyal
2017-10-10 15:32 ` [PATCH 3/9] ovl: Provide a mount option metacopy=on/off for metadata copyup Vivek Goyal
2017-10-11 1:36 ` Amir Goldstein
2017-10-11 13:57 ` Vivek Goyal
2017-10-11 16:29 ` Amir Goldstein
2017-10-11 16:53 ` Vivek Goyal
2017-10-11 17:36 ` Amir Goldstein
2017-10-11 18:34 ` Vivek Goyal
2017-10-11 20:29 ` Amir Goldstein
2017-10-12 13:23 ` Vivek Goyal
2017-10-12 13:39 ` Amir Goldstein
2017-10-10 15:32 ` [PATCH 4/9] ovl: Copy up only metadata during copy up where it makes sense Vivek Goyal
2017-10-10 15:32 ` [PATCH 5/9] ovl: Set xattr OVL_XATTR_METACOPY on upper file Vivek Goyal
2017-10-10 17:03 ` Amir Goldstein
2017-10-11 20:16 ` Vivek Goyal
2017-10-11 20:44 ` Amir Goldstein
2017-10-10 15:32 ` [PATCH 6/9] ovl: Fix ovl_getattr() to get number of blocks from lower Vivek Goyal
2017-10-10 15:32 ` [PATCH 7/9] ovl: Introduce read/write barriers around metacopy flag update Vivek Goyal
2017-10-10 17:12 ` Amir Goldstein
2017-10-11 20:27 ` Vivek Goyal
2017-10-11 21:08 ` Amir Goldstein
2017-10-13 18:27 ` Vivek Goyal
2017-10-14 6:05 ` Amir Goldstein
2017-10-14 7:00 ` Amir Goldstein
2017-10-16 13:24 ` Vivek Goyal
2017-10-16 13:24 ` Vivek Goyal
2017-10-16 13:31 ` Amir Goldstein
2017-10-10 15:32 ` [PATCH 8/9] ovl: Set OVL_METACOPY flag during ovl_lookup() Vivek Goyal
2017-10-10 15:32 ` Vivek Goyal [this message]
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