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nfsd: containerize NFSd filesystem

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This patch makes NFSD file system superblock to be created per net.
This makes possible to get proper network namespace from superblock instead of
using hard-coded "init_net".

Note: NFSd fs super-block holds network namespace. This garantees, that
network namespace won't disappear from underneath of it.
This, obviously, means, that in case of kill of a container's "init" (which is not a mount
namespace, but network namespace creator) netowrk namespace won't be
destroyed.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Stanislav Kinsbursky
2013-02-01 15:56:12 +03:00
committed by J. Bruce Fields
parent 1ac8362977
commit 11f779421a
2 changed files with 35 additions and 16 deletions
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5
fs/nfsd/nfssvc.c
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@@ -702,8 +702,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
int ret;
struct net *net = &init_net;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
struct nfsd_net *nn = net_generic(inode->i_sb->s_fs_info, nfsd_net_id);
mutex_lock(&nfsd_mutex);
if (nn->nfsd_serv == NULL) {
@@ -720,7 +719,7 @@ int nfsd_pool_stats_open(struct inode *inode, struct file *file)
int nfsd_pool_stats_release(struct inode *inode, struct file *file)
{
int ret = seq_release(inode, file);
struct net *net = &init_net;
struct net *net = inode->i_sb->s_fs_info;
mutex_lock(&nfsd_mutex);
/* this function really, really should have been called svc_put() */