From mboxrd@z Thu Jan 1 00:00:00 1970 From: Al Viro Subject: [PATCH v3 035/110] namei: expand the call of follow_link() in link_path_walk() Date: Mon, 11 May 2015 19:06:55 +0100 Message-ID: <1431367690-5223-35-git-send-email-viro@ZenIV.linux.org.uk> References: <20150511180650.GA4147@ZenIV.linux.org.uk> Cc: Neil Brown , Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org To: Linus Torvalds Return-path: In-Reply-To: <20150511180650.GA4147@ZenIV.linux.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: Al Viro ... and strip __always_inline from follow_link() - remaining callers don't need that. Now link_path_walk() recursion is a direct one. Signed-off-by: Al Viro --- fs/namei.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index 7fcda91..2354d4f 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -880,8 +880,7 @@ out: return res; } -static __always_inline int -follow_link(struct path *link, struct nameidata *nd, void **p) +static int follow_link(struct path *link, struct nameidata *nd, void **p) { const char *s = get_link(link, nd, p); int error; @@ -1815,10 +1814,29 @@ static int link_path_walk(const char *name, struct nameidata *nd) do { struct path link = nd->link; void *cookie; + const char *s = get_link(&link, nd, &cookie); - err = follow_link(&link, nd, &cookie); - if (err) + if (unlikely(IS_ERR(s))) { + err = PTR_ERR(s); break; + } + err = 0; + if (likely(s)) { + if (*s == '/') { + if (!nd->root.mnt) + set_root(nd); + path_put(&nd->path); + nd->path = nd->root; + path_get(&nd->root); + nd->flags |= LOOKUP_JUMPED; + } + nd->inode = nd->path.dentry->d_inode; + err = link_path_walk(s, nd); + if (unlikely(err)) { + put_link(nd, &link, cookie); + break; + } + } err = walk_component(nd, LOOKUP_FOLLOW); put_link(nd, &link, cookie); } while (err > 0); -- 2.1.4