linux-kernel - [PATCH v3 055/110] link_path_walk: nd->depth massage, part 4

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Message-Id: <1431367690-5223-55-git-send-email-viro@ZenIV.linux.org.uk>
Date:	Mon, 11 May 2015 19:07:15 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Neil Brown <neilb@...e.de>, Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH v3 055/110] link_path_walk: nd->depth massage, part 4

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

lift increment/decrement into link_path_walk() callers.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/namei.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 3df4731..cf5009b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1763,7 +1763,6 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 	if (!*name)
 		return 0;
 
-	nd->depth++;
 	/* At this point we know we have a real path component. */
 	for(;;) {
 		u64 hash_len;
@@ -1873,7 +1872,6 @@ Err:
 		nd->depth--;
 		put_link(nd);
 	}
-	nd->depth--;
 	return err;
 OK:
 	if (unlikely(nd->depth > 1)) {
@@ -1883,7 +1881,6 @@ OK:
 		put_link(nd);
 		goto Walked;
 	}
-	nd->depth--;
 	return 0;
 }
 
@@ -1986,7 +1983,10 @@ static int path_init(int dfd, const struct filename *name, unsigned int flags,
 	return -ECHILD;
 done:
 	current->total_link_count = 0;
-	return link_path_walk(s, nd);
+	nd->depth++;
+	retval = link_path_walk(s, nd);
+	nd->depth--;
+	return retval;
 }
 
 static void path_cleanup(struct nameidata *nd)
@@ -2020,7 +2020,9 @@ static int trailing_symlink(struct nameidata *nd)
 		nd->flags |= LOOKUP_JUMPED;
 	}
 	nd->inode = nd->path.dentry->d_inode;
+	nd->depth++;
 	error = link_path_walk(s, nd);
+	nd->depth--;
 	if (unlikely(error))
 		put_link(nd);
 	return error;
-- 
2.1.4

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