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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 04:14:54 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 04:14:54 +0300
commit6f83e5bd3e96228ee0caff0b103addb5f4e95459 (patch)
treebf27fcc754ea8c5287088df2803edbfb3c70f716 /fs/nfs/delegation.c
parent73b4f63aebd6d57db4ca1d31fa6f8516651207b0 (diff)
parentc627d31ba0696cbd829437af2be2f2dee3546b1e (diff)
downloadlinux-6f83e5bd3e96228ee0caff0b103addb5f4e95459.tar.xz
Merge tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust: "Highlights incluse: Features: - Removing the forced serialisation of open()/close() calls in NFSv4.x (x>0) makes for a significant performance improvement in metadata intensive workloads. - Full support for the pNFS "flexible files" layout type - Further RPC/RDMA client improvements from Chuck Bugfixes: - Stable fix: NFSv4.1 backchannel calls blocking operations with !TASK_RUNNING - Stable fix: pnfs_generic_pg_init_read/write can be called with lseg == NULL - Stable fix: Fix an Oopsable condition when nsm_mon_unmon is called as part of the namespace cleanup, - Stable fix: Ensure we reference the inode for return-on-close in delegreturn - Use SO_REUSEPORT to ensure that NFSv3 TCP connections can rebind to the same source address/port combination during a disconnect/ reconnect event. This is a requirement imposed by most NFSv3 server duplicate reply cache implementations. Optimisations: - Ask for no NFSv4.1 delegations on OPEN if using O_DIRECT Other: - Add Anna Schumaker as co-maintainer for the NFS client" * tag 'nfs-for-3.20-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (119 commits) SUNRPC: Cleanup to remove xs_tcp_close() pnfs: delete an unintended goto pnfs/flexfiles: Do not dprintk after the free SUNRPC: Fix stupid typo in xs_sock_set_reuseport SUNRPC: Define xs_tcp_fin_timeout only if CONFIG_SUNRPC_DEBUG SUNRPC: Handle connection reset more efficiently. SUNRPC: Remove the redundant XPRT_CONNECTION_CLOSE flag SUNRPC: Make xs_tcp_close() do a socket shutdown rather than a sock_release SUNRPC: Ensure xs_tcp_shutdown() requests a full close of the connection SUNRPC: Cleanup to remove remaining uses of XPRT_CONNECTION_ABORT SUNRPC: Remove TCP socket linger code SUNRPC: Remove TCP client connection reset hack SUNRPC: TCP/UDP always close the old socket before reconnecting SUNRPC: Add helpers to prevent socket create from racing SUNRPC: Ensure xs_reset_transport() resets the close connection flags SUNRPC: Do not clear the source port in xs_reset_transport SUNRPC: Handle EADDRINUSE on connect SUNRPC: Set SO_REUSEPORT socket option for TCP connections NFSv4.1: Fix pnfs_put_lseg races NFSv4.1: pnfs_send_layoutreturn should use GFP_NOFS ...
Diffstat (limited to 'fs/nfs/delegation.c')
-rw-r--r--fs/nfs/delegation.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 8cdb2b28a104..da5433230bb1 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -306,6 +306,17 @@ nfs_inode_detach_delegation(struct inode *inode)
return nfs_detach_delegation(nfsi, delegation, server);
}
+static void
+nfs_update_inplace_delegation(struct nfs_delegation *delegation,
+ const struct nfs_delegation *update)
+{
+ if (nfs4_stateid_is_newer(&update->stateid, &delegation->stateid)) {
+ delegation->stateid.seqid = update->stateid.seqid;
+ smp_wmb();
+ delegation->type = update->type;
+ }
+}
+
/**
* nfs_inode_set_delegation - set up a delegation on an inode
* @inode: inode to which delegation applies
@@ -339,9 +350,12 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
old_delegation = rcu_dereference_protected(nfsi->delegation,
lockdep_is_held(&clp->cl_lock));
if (old_delegation != NULL) {
- if (nfs4_stateid_match(&delegation->stateid,
- &old_delegation->stateid) &&
- delegation->type == old_delegation->type) {
+ /* Is this an update of the existing delegation? */
+ if (nfs4_stateid_match_other(&old_delegation->stateid,
+ &delegation->stateid)) {
+ nfs_update_inplace_delegation(old_delegation,
+ delegation);
+ nfsi->delegation_state = old_delegation->type;
goto out;
}
/*