Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index afd5876..c283a1e 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -36,6 +36,7 @@
 #include <asm/uaccess.h>
 
 #include "internal.h"
+#include "mount.h"
 
 /* [Feb-1997 T. Schoebel-Theuer]
  * Fundamental changes in the pathname lookup mechanisms (namei)
@@ -676,36 +677,38 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
 
 static int follow_up_rcu(struct path *path)
 {
-       struct vfsmount *parent;
+       struct mount *mnt = real_mount(path->mnt);
+       struct mount *parent;
        struct dentry *mountpoint;
 
-       parent = path->mnt->mnt_parent;
-       if (parent == path->mnt)
+       parent = mnt->mnt_parent;
+       if (&parent->mnt == path->mnt)
                return 0;
-       mountpoint = path->mnt->mnt_mountpoint;
+       mountpoint = mnt->mnt_mountpoint;
        path->dentry = mountpoint;
-       path->mnt = parent;
+       path->mnt = &parent->mnt;
        return 1;
 }
 
 int follow_up(struct path *path)
 {
-       struct vfsmount *parent;
+       struct mount *mnt = real_mount(path->mnt);
+       struct mount *parent;
        struct dentry *mountpoint;
 
        br_read_lock(vfsmount_lock);
-       parent = path->mnt->mnt_parent;
-       if (parent == path->mnt) {
+       parent = mnt->mnt_parent;
+       if (&parent->mnt == path->mnt) {
                br_read_unlock(vfsmount_lock);
                return 0;
        }
-       mntget(parent);
-       mountpoint = dget(path->mnt->mnt_mountpoint);
+       mntget(&parent->mnt);
+       mountpoint = dget(mnt->mnt_mountpoint);
        br_read_unlock(vfsmount_lock);
        dput(path->dentry);
        path->dentry = mountpoint;
        mntput(path->mnt);
-       path->mnt = parent;
+       path->mnt = &parent->mnt;
        return 1;
 }
 
@@ -884,7 +887,7 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
                               struct inode **inode)
 {
        for (;;) {
-               struct vfsmount *mounted;
+               struct mount *mounted;
                /*
                 * Don't forget we might have a non-mountpoint managed dentry
                 * that wants to block transit.
@@ -898,8 +901,8 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
                mounted = __lookup_mnt(path->mnt, path->dentry, 1);
                if (!mounted)
                        break;
-               path->mnt = mounted;
-               path->dentry = mounted->mnt_root;
+               path->mnt = &mounted->mnt;
+               path->dentry = mounted->mnt.mnt_root;
                nd->flags |= LOOKUP_JUMPED;
                nd->seq = read_seqcount_begin(&path->dentry->d_seq);
                /*
@@ -915,12 +918,12 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
 static void follow_mount_rcu(struct nameidata *nd)
 {
        while (d_mountpoint(nd->path.dentry)) {
-               struct vfsmount *mounted;
+               struct mount *mounted;
                mounted = __lookup_mnt(nd->path.mnt, nd->path.dentry, 1);
                if (!mounted)
                        break;
-               nd->path.mnt = mounted;
-               nd->path.dentry = mounted->mnt_root;
+               nd->path.mnt = &mounted->mnt;
+               nd->path.dentry = mounted->mnt.mnt_root;
                nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq);
        }
 }