From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 23 Mar 2012 15:53:47 +0000 (-0700)
Subject: Merge tag 'nfs-for-3.4-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
X-Git-Tag: firefly_0821_release~3680^2~3284
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=f63d395d47f37a4fe771e6d4b1db9d2cdae5ffc5

Merge tag 'nfs-for-3.4-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates for Linux 3.4 from Trond Myklebust:
 "New features include:
   - Add NFS client support for containers.

     This should enable most of the necessary functionality, including
     lockd support, and support for rpc.statd, NFSv4 idmapper and
     RPCSEC_GSS upcalls into the correct network namespace from which
     the mount system call was issued.

   - NFSv4 idmapper scalability improvements

     Base the idmapper cache on the keyring interface to allow
     concurrent access to idmapper entries.  Start the process of
     migrating users from the single-threaded daemon-based approach to
     the multi-threaded request-key based approach.

   - NFSv4.1 implementation id.

     Allows the NFSv4.1 client and server to mutually identify each
     other for logging and debugging purposes.

   - Support the 'vers=4.1' mount option for mounting NFSv4.1 instead of
     having to use the more counterintuitive 'vers=4,minorversion=1'.

   - SUNRPC tracepoints.

     Start the process of adding tracepoints in order to improve
     debugging of the RPC layer.

   - pNFS object layout support for autologin.

  Important bugfixes include:

   - Fix a bug in rpc_wake_up/rpc_wake_up_status that caused them to
     fail to wake up all tasks when applied to priority waitqueues.

   - Ensure that we handle read delegations correctly, when we try to
     truncate a file.

   - A number of fixes for NFSv4 state manager loops (mostly to do with
     delegation recovery)."

* tag 'nfs-for-3.4-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (224 commits)
  NFS: fix sb->s_id in nfs debug prints
  xprtrdma: Remove assumption that each segment is <= PAGE_SIZE
  xprtrdma: The transport should not bug-check when a dup reply is received
  pnfs-obj: autologin: Add support for protocol autologin
  NFS: Remove nfs4_setup_sequence from generic rename code
  NFS: Remove nfs4_setup_sequence from generic unlink code
  NFS: Remove nfs4_setup_sequence from generic read code
  NFS: Remove nfs4_setup_sequence from generic write code
  NFS: Fix more NFS debug related build warnings
  SUNRPC/LOCKD: Fix build warnings when CONFIG_SUNRPC_DEBUG is undefined
  nfs: non void functions must return a value
  SUNRPC: Kill compiler warning when RPC_DEBUG is unset
  SUNRPC/NFS: Add Kbuild dependencies for NFS_DEBUG/RPC_DEBUG
  NFS: Use cond_resched_lock() to reduce latencies in the commit scans
  NFSv4: It is not safe to dereference lsp->ls_state in release_lockowner
  NFS: ncommit count is being double decremented
  SUNRPC: We must not use list_for_each_entry_safe() in rpc_wake_up()
  Try using machine credentials for RENEW calls
  NFSv4.1: Fix a few issues in filelayout_commit_pagelist
  NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit code
  ...
---

f63d395d47f37a4fe771e6d4b1db9d2cdae5ffc5
diff --cc net/sunrpc/rpc_pipe.c
index 7d6dd6efbdbe,8584ec068e97..c84c0e0c41cb
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@@ -1033,12 -1114,32 +1114,28 @@@ rpc_fill_super(struct super_block *sb, 
  	sb->s_time_gran = 1;
  
  	inode = rpc_get_inode(sb, S_IFDIR | 0755);
 -	if (!inode)
 -		return -ENOMEM;
 -	sb->s_root = root = d_alloc_root(inode);
 -	if (!root) {
 -		iput(inode);
 +	sb->s_root = root = d_make_root(inode);
 +	if (!root)
  		return -ENOMEM;
 -	}
  	if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
  		return -ENOMEM;
+ 	dprintk("RPC:	sending pipefs MOUNT notification for net %p%s\n", net,
+ 								NET_NAME(net));
+ 	err = blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
+ 					   RPC_PIPEFS_MOUNT,
+ 					   sb);
+ 	if (err)
+ 		goto err_depopulate;
+ 	sb->s_fs_info = get_net(net);
+ 	sn->pipefs_sb = sb;
  	return 0;
+ 
+ err_depopulate:
+ 	blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
+ 					   RPC_PIPEFS_UMOUNT,
+ 					   sb);
+ 	__rpc_depopulate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF);
+ 	return err;
  }
  
  static struct dentry *