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NFS: replace global bl_mount_reply with per-net one

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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 <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky
2012-03-11 18:20:23 +04:00
committed by Trond Myklebust
parent d6d6dc7cdf
commit cb9c1c4a88
3 changed files with 11 additions and 9 deletions
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9
fs/nfs/blocklayout/blocklayoutdev.c
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@@ -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,