From cb9c1c4a880bc734c2848f8647be2cfa336ee346 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Sun, 11 Mar 2012 18:20:23 +0400 Subject: [PATCH] NFS: replace global bl_mount_reply with per-net one 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 Signed-off-by: Trond Myklebust --- 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 0966b39bbcfb..58ac8614c4c4 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 b48f782a94ad..1d58642b1530 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 7baad89ae60e..73425f555cde 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 -- 2.20.1