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authorStanislav Kinsbursky <skinsbursky@parallels.com>2011-12-26 15:39:30 +0300
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-31 18:20:24 -0500
commit90c4e82999c517e0cd00d0782c68d186cb18b784 (patch)
tree61e1984458df512d72c76721d9f4fe15821a6cea /net/sunrpc/rpc_pipe.c
parent432eb1a5fb380477ae759041bac2bb305977e436 (diff)
SUNRPC: put pipefs superblock link on network namespace
We have modules (like, pNFS blocklayout module) which creates pipes on rpc_pipefs. Thus we need per-net operations for them. To make it possible we require appropriate super block. So we have to put sb link on network namespace context. Note, that it's not strongly required to create pipes in per-net operations. IOW, if pipefs wasn't mounted yet, that no sb link reference will present on network namespace and in this case we need just need to pass through pipe creation. Pipe dentry will be created during pipefs mount notification. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/rpc_pipe.c')
-rw-r--r--net/sunrpc/rpc_pipe.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 6f295e6c12a0..e5e1f357b561 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1029,6 +1029,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode;
struct dentry *root;
struct net *net = data;
+ struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
int err;
sb->s_blocksize = PAGE_CACHE_SIZE;
@@ -1053,6 +1054,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
if (err)
goto err_depopulate;
sb->s_fs_info = get_net(net);
+ sn->pipefs_sb = sb;
return 0;
err_depopulate:
@@ -1073,7 +1075,9 @@ rpc_mount(struct file_system_type *fs_type,
void rpc_kill_sb(struct super_block *sb)
{
struct net *net = sb->s_fs_info;
+ struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+ sn->pipefs_sb = NULL;
put_net(net);
blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
RPC_PIPEFS_UMOUNT,