From: Amir Goldstein <amir73il@gmail.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Vivek Goyal <vgoyal@redhat.com>, linux-unionfs@vger.kernel.org
Subject: [PATCH 3/3] ovl: do not follow non-dir origin with redirect_dir=nofollow
Date: Mon, 13 Jul 2020 17:19:45 +0300 [thread overview]
Message-ID: <20200713141945.11719-4-amir73il@gmail.com> (raw)
In-Reply-To: <20200713141945.11719-1-amir73il@gmail.com>
Following non-dir origin can result in some bugs when underlying layers
are edited offline. To be on the safe side, do not follow non-dir
origin when not following redirects. This will make overlay lookup
with "redirect_dir=nofollow" behave as pre kernel v4.12 lookup, before
the introduction of the origin xattr.
Link: https://lore.kernel.org/linux-unionfs/CAJfpegv9h7ubuGy_6K4OCdZd3R7Z4HGmCDB2L7mO5bVoGd6MSA@mail.gmail.com/
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
fs/overlayfs/namei.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index ae1c1216a038..31ee5a519736 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -861,7 +861,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
err = -EREMOTE;
goto out;
}
- if (upperdentry && !d.is_dir) {
+ if (upperdentry && !d.is_dir && ofs->config.redirect_follow) {
unsigned int origin_ctr = 0;
/*
--
2.17.1
next prev parent reply other threads:[~2020-07-13 14:20 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 14:19 [PATCH 0/3] Misc. redirect_dir=nofollow fixes Amir Goldstein
2020-07-13 14:19 ` [PATCH 1/3] ovl: force read-only sb on failure to create index dir Amir Goldstein
2020-07-14 18:18 ` Vivek Goyal
2020-07-14 18:32 ` Amir Goldstein
2020-07-14 18:38 ` Vivek Goyal
2020-07-14 18:45 ` Amir Goldstein
2020-07-15 20:04 ` Miklos Szeredi
2020-07-16 5:00 ` Amir Goldstein
2020-07-15 20:03 ` Miklos Szeredi
2020-07-13 14:19 ` [PATCH 2/3] ovl: fix mount option checks for nfs_export with no upperdir Amir Goldstein
2020-07-14 14:52 ` Miklos Szeredi
2020-07-14 14:58 ` Amir Goldstein
2020-07-14 15:08 ` Miklos Szeredi
2020-07-14 15:20 ` Amir Goldstein
2020-07-15 20:05 ` Miklos Szeredi
2020-07-13 14:19 ` Amir Goldstein [this message]
2020-10-30 12:05 ` [PATCH 3/3] ovl: do not follow non-dir origin with redirect_dir=nofollow Miklos Szeredi
2020-10-30 13:20 ` Amir Goldstein
2020-10-30 13:51 ` Miklos Szeredi
2020-07-14 18:07 ` [PATCH 0/3] Misc. redirect_dir=nofollow fixes Vivek Goyal
2020-07-14 18:42 ` Amir Goldstein
2020-07-15 13:06 ` Vivek Goyal
2020-07-15 13:56 ` Amir Goldstein
2020-07-16 13:27 ` Vivek Goyal
2020-07-16 13:43 ` Amir Goldstein
2020-07-16 15:26 ` Vivek Goyal
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