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From: Vivek Goyal <vgoyal@redhat.com>
To: linux-unionfs@vger.kernel.org
Cc: amir73il@gmail.com, miklos@szeredi.hu, vgoyal@redhat.com
Subject: [PATCH 6/7] ovl: Return lower dentry if only metadata copy up took place
Date: Mon,  2 Oct 2017 09:40:04 -0400	[thread overview]
Message-ID: <1506951605-31440-7-git-send-email-vgoyal@redhat.com> (raw)
In-Reply-To: <1506951605-31440-1-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 fd5ea4facc62..79da8276ae82 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -96,10 +96,14 @@ 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

  parent reply	other threads:[~2017-10-02 13:40 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-02 13:39 [RFC PATCH 0/7] overlayfs: Delayed copy up of data Vivek Goyal
2017-10-02 13:39 ` [PATCH 1/7] Create origin xattr on copy up for all files Vivek Goyal
2017-10-02 19:10   ` Amir Goldstein
2017-10-02 13:40 ` [PATCH 2/7] ovl: During copy up, first copy up metadata and then data Vivek Goyal
2017-10-02 19:13   ` Amir Goldstein
2017-10-03 14:25     ` Vivek Goyal
2017-10-02 13:40 ` [PATCH 3/7] ovl: Copy up only metadata during copy up where it makes sense Vivek Goyal
2017-10-02 19:21   ` Amir Goldstein
2017-10-03 14:39     ` Vivek Goyal
2017-10-02 13:40 ` [PATCH 4/7] ovl: Set xattr OVL_XATTR_METACOPY on upper file Vivek Goyal
2017-10-02 19:28   ` Amir Goldstein
2017-10-03 15:10     ` Vivek Goyal
2017-10-03 16:09       ` Amir Goldstein
2017-10-02 13:40 ` [PATCH 5/7] ovl: Set OVL_METACOPY flag during ovl_lookup() Vivek Goyal
2017-10-02 19:31   ` Amir Goldstein
2017-10-03 15:27     ` Vivek Goyal
2017-10-03 15:42       ` Amir Goldstein
2017-10-03 18:20         ` Vivek Goyal
2017-10-04  7:48           ` Amir Goldstein
2017-10-06 15:15             ` Vivek Goyal
2017-10-02 13:40 ` Vivek Goyal [this message]
2017-10-02 13:40 ` [PATCH 7/7] ovl: Fix ovl_getattr() to get size from lower Vivek Goyal
2017-10-02 19:40   ` Amir Goldstein
2017-10-03 15:24     ` Vivek Goyal
2017-10-06 15:13     ` Vivek Goyal
2017-10-06 15:32       ` Amir Goldstein
2017-10-02 19:03 ` [RFC PATCH 0/7] overlayfs: Delayed copy up of data Amir Goldstein
2017-10-02 19:48   ` Vivek Goyal
2017-10-03  5:36     ` Amir Goldstein
2017-10-03 13:26       ` Vivek Goyal

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