Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "Followups to the parallel lookup work:

   - update docs

   - restore killability of the places that used to take ->i_mutex
     killably now that we have down_write_killable() merged

   - Additionally, it turns out that I missed a prerequisite for
     security_d_instantiate() stuff - ->getxattr() wasn't the only thing
     that could be called before dentry is attached to inode; with smack
     we needed the same treatment applied to ->setxattr() as well"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  switch ->setxattr() to passing dentry and inode separately
  switch xattr_handler->set() to passing dentry and inode separately
  restore killability of old mutex_lock_killable(&inode->i_mutex) users
  add down_write_killable_nested()
  update D/f/directory-locking

3 files changed, 7 insertions, 7 deletions

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index c7b31a03dc9c..0ed7c4012437 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -210,8 +210,9 @@ static bool ovl_is_private_xattr(const char *name)
         return strncmp(name, OVL_XATTR_PRE_NAME, OVL_XATTR_PRE_LEN) == 0;
 }
 
-int ovl_setxattr(struct dentry *dentry, const char *name,
-                 const void *value, size_t size, int flags)
+int ovl_setxattr(struct dentry *dentry, struct inode *inode,
+                 const char *name, const void *value,
+                 size_t size, int flags)
 {
         int err;
         struct dentry *upperdentry;
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 724f5fcb4e24..4bd9b5ba8f42 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -172,8 +172,9 @@ int ovl_check_d_type_supported(struct path *realpath);
 /* inode.c */
 int ovl_setattr(struct dentry *dentry, struct iattr *attr);
 int ovl_permission(struct inode *inode, int mask);
-int ovl_setxattr(struct dentry *dentry, const char *name,
-                 const void *value, size_t size, int flags);
+int ovl_setxattr(struct dentry *dentry, struct inode *inode,
+                 const char *name, const void *value,
+                 size_t size, int flags);
 ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
                      const char *name, void *value, size_t size);
 ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index d11ae826bcbc..cf37fc76fc9f 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -210,9 +210,7 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
 
         old_cred = ovl_override_creds(rdd->dentry->d_sb);
 
-        inode_lock(dir->d_inode);
-        err = 0;
-        // XXX: err = mutex_lock_killable(&dir->d_inode->i_mutex);
+        err = down_write_killable(&dir->d_inode->i_rwsem);
         if (!err) {
                 while (rdd->first_maybe_whiteout) {
                         p = rdd->first_maybe_whiteout;