From: Amir Goldstein <amir73il@gmail.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-unionfs@vger.kernel.org
Subject: [PATCH v4 17/25] ovl: factor out ovl_copy_up_inode() helper
Date: Wed, 21 Jun 2017 15:28:48 +0300 [thread overview]
Message-ID: <1498048136-28218-18-git-send-email-amir73il@gmail.com> (raw)
In-Reply-To: <1498048136-28218-1-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 f6570bc127e7..e642a51f3be4 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -316,6 +316,42 @@ 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,
@@ -375,33 +411,7 @@ 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:[~2017-06-21 12:29 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-21 12:28 [PATCH v4 00/25] Overlayfs inodes index Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 01/25] vfs: introduce inode 'inuse' lock Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 02/25] ovl: get exclusive ownership on upper/work dirs Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 03/25] ovl: relax same fs constrain for ovl_check_origin() Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 04/25] ovl: generalize ovl_create_workdir() Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 05/25] ovl: introduce the inodes index dir feature Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 06/25] ovl: verify upper root dir matches lower root dir Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 07/25] ovl: verify index dir matches upper dir Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 08/25] ovl: store path type in dentry Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 09/25] ovl: cram dentry state booleans into type flags Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 10/25] ovl: lookup index entry for copy up origin Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 11/25] ovl: cleanup bad and stale index entries on mount Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 12/25] ovl: allocate an ovl_inode struct Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 13/25] ovl: store upper/lower real inode in ovl_inode_info Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 14/25] ovl: use ovl_inode_init() for initializing new inode Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 15/25] ovl: hash overlay non-dir inodes by copy up origin inode Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 16/25] ovl: defer upper dir lock to tempfile link Amir Goldstein
2017-06-21 12:28 ` Amir Goldstein [this message]
2017-06-21 12:28 ` [PATCH v4 18/25] ovl: generalize ovl_copy_up_locked() using actors Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 19/25] ovl: generalize ovl_copy_up_one() " Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 20/25] ovl: use ovl_inode mutex to synchronize concurrent copy up Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 21/25] ovl: implement index dir copy up method Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 22/25] ovl: link up indexed lower hardlink on lookup Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 23/25] ovl: fix nlink leak in ovl_rename() Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 24/25] ovl: persistent overlay inode nlink for indexed inodes Amir Goldstein
2017-06-23 11:34 ` Amir Goldstein
2017-06-21 12:28 ` [PATCH v4 25/25] ovl: cleanup orphan index entries Amir Goldstein
2017-06-21 16:45 ` Amir Goldstein
2017-06-21 17:02 ` [PATCH v4 00/25] Overlayfs inodes index Amir Goldstein
2017-06-21 20:03 ` Amir Goldstein
2017-06-22 10:18 ` [PATCH v4 26/25] ovl: document copying layers restrictions with " 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=1498048136-28218-18-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