From: Amir Goldstein <amir73il@gmail.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-unionfs@vger.kernel.org
Subject: [PATCH 13/17] ovl: factor out ovl_copy_up_inode() helper
Date: Fri, 2 Jun 2017 17:04:40 +0300 [thread overview]
Message-ID: <1496412284-4113-14-git-send-email-amir73il@gmail.com> (raw)
In-Reply-To: <1496412284-4113-1-git-send-email-amir73il@gmail.com>
Factor out helper for copying lower inode data and metadata to temp
upper inode, that is common to copy up using O_TMPFILE and workdir.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
---
fs/overlayfs/copy_up.c | 64 +++++++++++++++++++++++++++++---------------------
1 file changed, 37 insertions(+), 27 deletions(-)
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 1fd73e4fa380..44985d9b3c8d 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -322,6 +322,42 @@ static int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
return err;
}
+static int ovl_copy_up_inode(struct dentry *dentry, struct dentry *temp,
+ struct path *lowerpath, struct kstat *stat)
+{
+ int err;
+
+ if (S_ISREG(stat->mode)) {
+ struct path upperpath;
+
+ ovl_path_upper(dentry, &upperpath);
+ BUG_ON(upperpath.dentry != NULL);
+ upperpath.dentry = temp;
+
+ err = ovl_copy_up_data(lowerpath, &upperpath, stat->size);
+ if (err)
+ return err;
+ }
+
+ err = ovl_copy_xattr(lowerpath->dentry, temp);
+ if (err)
+ return err;
+
+ inode_lock(temp->d_inode);
+ err = ovl_set_attr(temp, stat);
+ inode_unlock(temp->d_inode);
+ if (err)
+ return err;
+
+ /*
+ * Store identifier of lower inode in upper inode xattr to
+ * allow lookup of the copy up origin inode.
+ */
+ err = ovl_set_origin(dentry, lowerpath->dentry, temp);
+
+ return err;
+}
+
static int ovl_copy_up_locked(struct dentry *workdir, struct dentry *upperdir,
struct dentry *dentry, struct path *lowerpath,
struct kstat *stat, const char *link,
@@ -381,33 +417,7 @@ static int ovl_copy_up_locked(struct dentry *workdir, struct dentry *upperdir,
if (err)
goto out2;
- if (S_ISREG(stat->mode)) {
- struct path upperpath;
-
- ovl_path_upper(dentry, &upperpath);
- BUG_ON(upperpath.dentry != NULL);
- upperpath.dentry = temp;
-
- err = ovl_copy_up_data(lowerpath, &upperpath, stat->size);
- if (err)
- goto out_cleanup;
- }
-
- err = ovl_copy_xattr(lowerpath->dentry, temp);
- if (err)
- goto out_cleanup;
-
- inode_lock(temp->d_inode);
- err = ovl_set_attr(temp, stat);
- inode_unlock(temp->d_inode);
- if (err)
- goto out_cleanup;
-
- /*
- * Store identifier of lower inode in upper inode xattr to
- * allow lookup of the copy up origin inode.
- */
- err = ovl_set_origin(dentry, lowerpath->dentry, temp);
+ err = ovl_copy_up_inode(dentry, temp, lowerpath, stat);
if (err)
goto out_cleanup;
--
2.7.4
next prev parent reply other threads:[~2017-06-02 14:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-02 14:04 [PATCH 00/17] Avoid breaking lower hardlinks on copy up Amir Goldstein
2017-06-02 14:04 ` [PATCH 01/17] vfs: add helper wait_on_inode_inuse() Amir Goldstein
2017-06-02 14:04 ` [PATCH 02/17] ovl: generalize ovl_create_workdir() Amir Goldstein
2017-06-02 14:04 ` [PATCH 03/17] ovl: introduce the inodes index dir feature Amir Goldstein
2017-06-02 14:04 ` [PATCH 04/17] ovl: verify index dir matches upper dir Amir Goldstein
2017-06-02 14:04 ` [PATCH 05/17] ovl: create helper ovl_lookup_index() Amir Goldstein
2017-06-02 14:04 ` [PATCH 06/17] ovl: move inode helpers to inode.c Amir Goldstein
2017-06-02 14:04 ` [PATCH 07/17] ovl: create helpers for initializing hashed inode Amir Goldstein
2017-06-02 14:04 ` [PATCH 08/17] ovl: use ovl_inode_init() for initializing new inode Amir Goldstein
2017-06-02 14:04 ` [PATCH 09/17] ovl: allow hashing non upper inodes Amir Goldstein
2017-06-02 14:04 ` [PATCH 10/17] ovl: allow hashing inodes by arbitrary key Amir Goldstein
2017-06-02 14:04 ` [PATCH 11/17] ovl: hash overlay non-dir inodes by copy up origin inode Amir Goldstein
2017-06-05 12:42 ` Amir Goldstein
2017-06-02 14:04 ` [PATCH 12/17] ovl: defer upper dir lock to tempfile link Amir Goldstein
2017-06-02 14:04 ` Amir Goldstein [this message]
2017-06-02 14:04 ` [PATCH 14/17] ovl: generalize ovl_copy_up_locked() using actors Amir Goldstein
2017-06-02 14:04 ` [PATCH 15/17] ovl: generalize ovl_copy_up_one() " Amir Goldstein
2017-06-02 14:04 ` [PATCH 16/17] ovl: implement index dir copy up method Amir Goldstein
2017-06-02 14:04 ` [PATCH 17/17] ovl: handle race of concurrent lower hardlinks copy up Amir Goldstein
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1496412284-4113-14-git-send-email-amir73il@gmail.com \
--to=amir73il@gmail.com \
--cc=linux-unionfs@vger.kernel.org \
--cc=miklos@szeredi.hu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox