namei: simplify the callers of follow_managed()

now that it gets nameidata, no reason to have setting LOOKUP_JUMPED on
mountpoint crossing and calling path_put_conditional() on failures
done in every caller.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namei.c b/fs/namei.c
index 699e093..b57400c 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1118,7 +1118,11 @@ static int follow_managed(struct path *path, struct nameidata *nd)
                mntput(path->mnt);
        if (ret == -EISDIR)
                ret = 0;
-       return ret < 0 ? ret : need_mntput;
+       if (need_mntput)
+               nd->flags |= LOOKUP_JUMPED;
+       if (unlikely(ret < 0))
+               path_put_conditional(path, nd);
+       return ret;
 }
 
 int follow_down_one(struct path *path)
@@ -1494,14 +1498,9 @@ unlazy:
        path->mnt = mnt;
        path->dentry = dentry;
        err = follow_managed(path, nd);
-       if (unlikely(err < 0)) {
-               path_put_conditional(path, nd);
-               return err;
-       }
-       if (err)
-               nd->flags |= LOOKUP_JUMPED;
-       *inode = path->dentry->d_inode;
-       return 0;
+       if (likely(!err))
+               *inode = path->dentry->d_inode;
+       return err;
 
 need_lookup:
        return 1;
@@ -1511,7 +1510,6 @@ need_lookup:
 static int lookup_slow(struct nameidata *nd, struct path *path)
 {
        struct dentry *dentry, *parent;
-       int err;
 
        parent = nd->path.dentry;
        BUG_ON(nd->inode != parent->d_inode);
@@ -1523,14 +1521,7 @@ static int lookup_slow(struct nameidata *nd, struct path *path)
                return PTR_ERR(dentry);
        path->mnt = nd->path.mnt;
        path->dentry = dentry;
-       err = follow_managed(path, nd);
-       if (unlikely(err < 0)) {
-               path_put_conditional(path, nd);
-               return err;
-       }
-       if (err)
-               nd->flags |= LOOKUP_JUMPED;
-       return 0;
+       return follow_managed(path, nd);
 }
 
 static inline int may_lookup(struct nameidata *nd)
@@ -3098,10 +3089,7 @@ retry_lookup:
 
        error = follow_managed(&path, nd);
        if (error < 0)
-               goto exit_dput;
-
-       if (error)
-               nd->flags |= LOOKUP_JUMPED;
+               goto out;
 
        BUG_ON(nd->flags & LOOKUP_RCU);
        inode = path.dentry->d_inode;