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SUNRPC: hold current network namespace while pipefs superblock is active

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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