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Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c37
1 files changed, 7 insertions, 30 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 89509b5a090e..9791b1e7eee4 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -38,6 +38,7 @@
#include <linux/prefetch.h>
#include <linux/ratelimit.h>
#include "internal.h"
+#include "mount.h"
/*
* Usage:
@@ -2451,6 +2452,7 @@ static int prepend_path(const struct path *path,
{
struct dentry *dentry = path->dentry;
struct vfsmount *vfsmnt = path->mnt;
+ struct mount *mnt = real_mount(vfsmnt);
bool slash = false;
int error = 0;
@@ -2460,11 +2462,11 @@ static int prepend_path(const struct path *path,
if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
/* Global root? */
- if (vfsmnt->mnt_parent == vfsmnt) {
+ if (!mnt_has_parent(mnt))
goto global_root;
- }
- dentry = vfsmnt->mnt_mountpoint;
- vfsmnt = vfsmnt->mnt_parent;
+ dentry = mnt->mnt_mountpoint;
+ mnt = mnt->mnt_parent;
+ vfsmnt = &mnt->mnt;
continue;
}
parent = dentry->d_parent;
@@ -2501,7 +2503,7 @@ global_root:
if (!slash)
error = prepend(buffer, buflen, "/", 1);
if (!error)
- error = vfsmnt->mnt_ns ? 1 : 2;
+ error = real_mount(vfsmnt)->mnt_ns ? 1 : 2;
goto out;
}
@@ -2853,31 +2855,6 @@ int is_subdir(struct dentry *new_dentry, struct dentry *old_dentry)
return result;
}
-int path_is_under(struct path *path1, struct path *path2)
-{
- struct vfsmount *mnt = path1->mnt;
- struct dentry *dentry = path1->dentry;
- int res;
-
- br_read_lock(vfsmount_lock);
- if (mnt != path2->mnt) {
- for (;;) {
- if (mnt->mnt_parent == mnt) {
- br_read_unlock(vfsmount_lock);
- return 0;
- }
- if (mnt->mnt_parent == path2->mnt)
- break;
- mnt = mnt->mnt_parent;
- }
- dentry = mnt->mnt_mountpoint;
- }
- res = is_subdir(dentry, path2->dentry);
- br_read_unlock(vfsmount_lock);
- return res;
-}
-EXPORT_SYMBOL(path_is_under);
-
void d_genocide(struct dentry *root)
{
struct dentry *this_parent;