From dd3e2c55a45fe75f3213b17b74f9a32380f4e84b Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 3 Oct 2013 21:21:39 -0400 Subject: [PATCH] fuse: rcu-delay freeing fuse_conn makes ->permission() and ->d_revalidate() safety in RCU mode independent from vfsmount_lock. Signed-off-by: Al Viro --- fs/fuse/cuse.c | 2 +- fs/fuse/fuse_i.h | 2 ++ fs/fuse/inode.c | 2 +- 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c index adbfd66b380..8ca88d716dd 100644 --- a/fs/fuse/cuse.c +++ b/fs/fuse/cuse.c @@ -473,7 +473,7 @@ err: 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 fe446c222e3..4715674f050 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -377,6 +377,8 @@ struct fuse_conn { /** 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 1c15613c64f..d468643a68b 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -918,7 +918,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req) 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) -- 2.43.2