linux-kernel - [RFC][PATCH v2 29/34] do_last(): merge the may

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Message-Id: <20200223011626.4103706-29-viro@ZenIV.linux.org.uk>
Date:   Sun, 23 Feb 2020 01:16:21 +0000
From:   Al Viro <viro@...IV.linux.org.uk>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [RFC][PATCH v2 29/34] do_last(): merge the may_open() calls

From: Al Viro <viro@...iv.linux.org.uk>

have FMODE_OPENED case rejoin the main path at earlier point

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/namei.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 16786be13050..f79e020f08fe 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3215,10 +3215,7 @@ static const char *do_last(struct nameidata *nd,
 		audit_inode(nd->name, file->f_path.dentry, 0);
 		dput(nd->path.dentry);
 		nd->path.dentry = dentry;
-		error = may_open(&nd->path, acc_mode, open_flag);
-		if (error)
-			goto out;
-		goto opened;
+		goto finish_open_created;
 	}
 
 	if (file->f_mode & FMODE_CREATED) {
@@ -3285,11 +3282,10 @@ static const char *do_last(struct nameidata *nd,
 	error = may_open(&nd->path, acc_mode, open_flag);
 	if (error)
 		goto out;
-	BUG_ON(file->f_mode & FMODE_OPENED); /* once it's opened, it's opened */
-	error = vfs_open(&nd->path, file);
+	if (!(file->f_mode & FMODE_OPENED))
+		error = vfs_open(&nd->path, file);
 	if (error)
 		goto out;
-opened:
 	error = ima_file_check(file, op->acc_mode);
 	if (!error && will_truncate)
 		error = handle_truncate(file);
-- 
2.11.0