4 files changed, 22 insertions, 7 deletions

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 5439e1bc9a8..34a3263d60a 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/fs.h>
+#include <linux/namei.h>
 #include <linux/pagemap.h>
 #include <linux/ctype.h>
 #include <linux/sched.h>
@@ -23,7 +24,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
 static int afs_dir_open(struct inode *inode, struct file *file);
 static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
 static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
-static int afs_d_delete(struct dentry *dentry);
+static int afs_d_delete(const struct dentry *dentry);
 static void afs_d_release(struct dentry *dentry);
 static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
                                   loff_t fpos, u64 ino, unsigned dtype);
@@ -581,7 +582,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
         }
 
 success:
-        dentry->d_op = &afs_fs_dentry_operations;
+        d_set_d_op(dentry, &afs_fs_dentry_operations);
 
         d_add(dentry, inode);
         _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%llu }",
@@ -607,6 +608,9 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
         void *dir_version;
         int ret;
 
+        if (nd->flags & LOOKUP_RCU)
+                return -ECHILD;
+
         vnode = AFS_FS_I(dentry->d_inode);
 
         if (dentry->d_inode)
@@ -730,7 +734,7 @@ out_bad:
  * - called from dput() when d_count is going to 0.
  * - return 1 to request dentry be unhashed, 0 otherwise
  */
-static int afs_d_delete(struct dentry *dentry)
+static int afs_d_delete(const struct dentry *dentry)
 {
         _enter("%s", dentry->d_name.name);
 
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index cca8eef736f..6d4bc1c8ff6 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -624,7 +624,7 @@ extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
 extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
-extern int afs_permission(struct inode *, int);
+extern int afs_permission(struct inode *, int, unsigned int);
 
 /*
  * server.c
diff --git a/fs/afs/security.c b/fs/afs/security.c
index bb4ed144d0e..f44b9d35537 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -285,13 +285,16 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
  * - AFS ACLs are attached to directories only, and a file is controlled by its
  *   parent directory's ACL
  */
-int afs_permission(struct inode *inode, int mask)
+int afs_permission(struct inode *inode, int mask, unsigned int flags)
 {
         struct afs_vnode *vnode = AFS_FS_I(inode);
         afs_access_t uninitialized_var(access);
         struct key *key;
         int ret;
 
+        if (flags & IPERM_FLAG_RCU)
+                return -ECHILD;
+
         _enter("{{%x:%u},%lx},%x,",
                vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
 
@@ -347,7 +350,7 @@ int afs_permission(struct inode *inode, int mask)
         }
 
         key_put(key);
-        ret = generic_permission(inode, mask, NULL);
+        ret = generic_permission(inode, mask, flags, NULL);
         _leave(" = %d", ret);
         return ret;
 
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 27201cffece..f901a9d7c11 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -498,6 +498,14 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
         return &vnode->vfs_inode;
 }
 
+static void afs_i_callback(struct rcu_head *head)
+{
+        struct inode *inode = container_of(head, struct inode, i_rcu);
+        struct afs_vnode *vnode = AFS_FS_I(inode);
+        INIT_LIST_HEAD(&inode->i_dentry);
+        kmem_cache_free(afs_inode_cachep, vnode);
+}
+
 /*
  * destroy an AFS inode struct
  */
@@ -511,7 +519,7 @@ static void afs_destroy_inode(struct inode *inode)
 
         ASSERTCMP(vnode->server, ==, NULL);
 
-        kmem_cache_free(afs_inode_cachep, vnode);
+        call_rcu(&inode->i_rcu, afs_i_callback);
         atomic_dec(&afs_count_active_inodes);
 }