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SUNRPC: hold current network namespace while pipefs superblock is active 

We want to be sure that network namespace is still alive while we have pipefs
mounted.
This will be required later, when RPC pipefs will be mounting only from
user-space context.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2011-12-26 15:39:04 +03:00 committed by Trond Myklebust
parent 38b0da7522
commit 021c68dec8
1 changed files with 13 additions and 1 deletions
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14
net/sunrpc/rpc_pipe.c
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@ -27,6 +27,9 @@
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/cache.h>
#include <linux/nsproxy.h>
#include "netns.h"
static struct vfsmount *rpc_mnt __read_mostly;
static int rpc_mount_count;
@ -1011,6 +1014,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
}
if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
return -ENOMEM;
sb->s_fs_info = get_net(net);
return 0;
}
@ -1021,11 +1025,19 @@ rpc_mount(struct file_system_type *fs_type,
return mount_ns(fs_type, flags, current->nsproxy->net_ns, rpc_fill_super);
}
void rpc_kill_sb(struct super_block *sb)
{
struct net *net = sb->s_fs_info;
put_net(net);
kill_litter_super(sb);
}
static struct file_system_type rpc_pipe_fs_type = {
.owner = THIS_MODULE,
.name = "rpc_pipefs",
.mount = rpc_mount,
.kill_sb = kill_litter_super,
.kill_sb = rpc_kill_sb,
};
static void