From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stanislav Kinsbursky Subject: [PATCH 1/2] NFS: replace global bl_mount_reply with per-net one Date: Sun, 11 Mar 2012 18:20:23 +0400 Message-ID: <20120311142023.17962.19833.stgit@localhost6.localdomain6> References: <20120311141528.17962.83828.stgit@localhost6.localdomain6> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: linux-nfs@vger.kernel.org, xemul@parallels.com, neilb@suse.de, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, jbottomley@parallels.com, bfields@fieldses.org, davem@davemloft.net, devel@openvz.org To: Trond.Myklebust@netapp.com Return-path: In-Reply-To: <20120311141528.17962.83828.stgit@localhost6.localdomain6> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org This global variable is used for blocklayout downcall and thus can be corrupted if case of existence of multiple networks namespaces. Signed-off-by: Stanislav Kinsbursky --- fs/nfs/blocklayout/blocklayout.h | 5 ----- fs/nfs/blocklayout/blocklayoutdev.c | 9 +++++---- fs/nfs/netns.h | 6 ++++++ 3 files changed, 11 insertions(+), 9 deletions(-) diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h index 0966b39..58ac861 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h @@ -153,11 +153,6 @@ BLK_LSEG2EXT(struct pnfs_layout_segment *lseg) return BLK_LO2EXT(lseg->pls_layout); } -struct bl_dev_msg { - int32_t status; - uint32_t major, minor; -}; - struct bl_msg_hdr { u8 type; u16 totallen; /* length of entire message, including hdr itself */ diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c index b48f782..1d58642 100644 --- a/fs/nfs/blocklayout/blocklayoutdev.c +++ b/fs/nfs/blocklayout/blocklayoutdev.c @@ -79,15 +79,16 @@ int nfs4_blkdev_put(struct block_device *bdev) return blkdev_put(bdev, FMODE_READ); } -static struct bl_dev_msg bl_mount_reply; - ssize_t bl_pipe_downcall(struct file *filp, const char __user *src, size_t mlen) { + struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info, + nfs_net_id); + if (mlen != sizeof (struct bl_dev_msg)) return -EINVAL; - if (copy_from_user(&bl_mount_reply, src, mlen) != 0) + if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0) return -EFAULT; wake_up(&bl_wq); @@ -118,10 +119,10 @@ nfs4_blk_decode_device(struct nfs_server *server, }; uint8_t *dataptr; DECLARE_WAITQUEUE(wq, current); - struct bl_dev_msg *reply = &bl_mount_reply; int offset, len, i, rc; struct net *net = server->nfs_client->net; struct nfs_net *nn = net_generic(net, nfs_net_id); + struct bl_dev_msg *reply = &nn->bl_mount_reply; dprintk("%s CREATING PIPEFS MESSAGE\n", __func__); dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data, diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h index 7baad89..73425f5 100644 --- a/fs/nfs/netns.h +++ b/fs/nfs/netns.h @@ -4,9 +4,15 @@ #include #include +struct bl_dev_msg { + int32_t status; + uint32_t major, minor; +}; + struct nfs_net { struct cache_detail *nfs_dns_resolve; struct rpc_pipe *bl_device_pipe; + struct bl_dev_msg bl_mount_reply; struct list_head nfs_client_list; struct list_head nfs_volume_list; #ifdef CONFIG_NFS_V4