fuse: rcu-delay freeing fuse_conn
makes ->permission() and ->d_revalidate() safety in RCU mode independent
from vfsmount_lock.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index adbfd66..8ca88d7 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -473,7 +473,7 @@
static void cuse_fc_release(struct fuse_conn *fc)
{
struct cuse_conn *cc = fc_to_cc(fc);
- kfree(cc);
+ kfree_rcu(cc, fc.rcu);
}
/**
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index fe446c2..4715674 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -377,6 +377,8 @@
/** Refcount */
atomic_t count;
+ struct rcu_head rcu;
+
/** The user id for this mount */
kuid_t user_id;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 1c15613..d468643 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -918,7 +918,7 @@
static void fuse_free_conn(struct fuse_conn *fc)
{
- kfree(fc);
+ kfree_rcu(fc, rcu);
}
static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)