Andrew Elble 7fc0564e3a nfsd: fix race with open / open upgrade stateids ... We observed multiple open stateids on the server for files that seemingly should have been closed. nfsd4_process_open2() tests for the existence of a preexisting stateid. If one is not found, the locks are dropped and a new one is created. The problem is that init_open_stateid(), which is also responsible for hashing the newly initialized stateid, doesn't check to see if another open has raced in and created a matching stateid. This fix is to enable init_open_stateid() to return the matching stateid and have nfsd4_process_open2() swap to that stateid and switch to the open upgrade path. In testing this patch, coverage to the newly created path indicates that the race was indeed happening. Signed-off-by: Andrew Elble <aweits@rit.edu> Reviewed-by: Jeff Layton <jlayton@poochiereds.net> Signed-off-by: J. Bruce Fields <bfields@redhat.com>		2015-11-10 09:29:45 -05:00
..
acl.h	nfsd4: remove nfs4_acl_new	2014-07-08 17:14:27 -04:00
auth.c	nfsd: silence sparse warning about accessing credentials	2014-07-17 16:15:35 -04:00
auth.h	nfsd: Remove nfsd_luid, nfsd_lgid, nfsd_ruid and nfsd_rgid	2013-02-13 06:15:51 -08:00
blocklayout.c	nfsd/blocklayout: accept any minlength	2015-10-09 16:11:40 -04:00
blocklayoutxdr.c	pnfs: move common blocklayout XDR defintions to nfs4.h	2015-08-17 13:22:49 -05:00
blocklayoutxdr.h	pnfs: move common blocklayout XDR defintions to nfs4.h	2015-08-17 13:22:49 -05:00
cache.h	nfsd: Remove the cache_hash list	2014-08-17 12:00:12 -04:00
current_stateid.h	nfsd41: use current stateid by value	2012-02-15 11:20:45 -05:00
export.c	sunrpc/nfsd: Remove redundant code by exports seq_operations functions	2015-08-13 08:59:02 -04:00
export.h	nfsd: include linux/nfs4.h in export.h	2015-08-13 10:21:21 -04:00
fault_inject.c	nfsd: remove old fault injection infrastructure	2014-08-05 10:55:10 -04:00
idmap.h	nfsd: Remove duplicate define of IDMAP_NAMESZ/IDMAP_TYPE_xx	2015-07-20 14:58:46 -04:00
Kconfig	Merge branch 'for-4.1' of git://linux-nfs.org/~bfields/linux	2015-04-24 07:46:05 -07:00
lockd.c	nfsd: Remove deprecated nfsctl system call and related code.	2011-07-15 18:58:42 -04:00
Makefile	nfsd: pNFS block layout driver	2015-02-05 14:35:18 +01:00
netns.h	nfsd: New counter for generating client confirm verifier	2015-08-10 16:05:47 -04:00
nfs2acl.c	nfsd: Add macro NFS_ACL_MASK for ACL	2015-07-20 14:58:46 -04:00
nfs3acl.c	nfsd: Add macro NFS_ACL_MASK for ACL	2015-07-20 14:58:46 -04:00
nfs3proc.c	VFS: normal filesystems (and lustre): d_inode() annotations	2015-04-15 15:06:57 -04:00
nfs3xdr.c	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
nfs4acl.c	nfsd: Fix two typos in comments	2015-08-13 10:26:24 -04:00
nfs4callback.c	nfsd: New helper nfsd4_cb_sequence_done() for processing more cb errors	2015-08-13 08:57:06 -04:00
nfs4idmap.c	nfsd: Remove duplicate define of IDMAP_NAMESZ/IDMAP_TYPE_xx	2015-07-20 14:58:46 -04:00
nfs4layouts.c	nfsd: ensure that seqid morphing operations are atomic wrt to copies	2015-10-23 15:57:33 -04:00
nfs4proc.c	nfsd: serialize layout stateid morphing operations	2015-10-23 15:57:32 -04:00
nfs4recover.c	nfsd: don't WARN/backtrace for invalid container deployment.	2015-08-31 16:32:08 -04:00
nfs4state.c	nfsd: fix race with open / open upgrade stateids	2015-11-10 09:29:45 -05:00
nfs4xdr.c	NFSD: Return word2 bitmask if setting security label in OPEN/CREATE	2015-08-31 16:16:40 -04:00
nfscache.c	nfsd: remove recurring workqueue job to clean DRC	2015-11-10 09:25:51 -05:00
nfsctl.c	nfsd: fix nsfd startup race triggering BUG_ON	2015-04-21 16:16:03 -04:00
nfsd.h	nfsd: eliminate NFSD_DEBUG	2015-04-21 16:16:02 -04:00
nfsfh.c	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
nfsfh.h	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
nfsproc.c	nfsd: Disable NFSv2 timestamp workaround for NFSv3+	2015-05-29 11:04:01 -04:00
nfssvc.c	nfsd/sunrpc: abstract out svc_set_num_threads to sv_ops	2015-08-10 16:05:43 -04:00
nfsxdr.c	VFS: normal filesystems (and lustre): d_inode() annotations	2015-04-15 15:06:57 -04:00
pnfs.h	nfsd4: fix v3-less build	2015-02-16 11:43:13 -05:00
state.h	nfsd: ensure that seqid morphing operations are atomic wrt to copies	2015-10-23 15:57:33 -04:00
stats.c	nfsd: move <linux/nfsd/stats.h> to fs/nfsd	2014-05-06 17:54:55 -04:00
stats.h	nfsd: move <linux/nfsd/stats.h> to fs/nfsd	2014-05-06 17:54:55 -04:00
trace.c	nfsd: move include of state.h from trace.c to trace.h	2015-10-23 15:57:29 -04:00
trace.h	nfsd: move include of state.h from trace.c to trace.h	2015-10-23 15:57:29 -04:00
vfs.c	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
vfs.h	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
xdr3.h	nfsd: fix encode_entryplus_baggage stack usage	2014-01-23 13:50:27 -05:00
xdr4.h	nfsd: switch unsigned char flags in svc_fh to bools	2015-10-12 17:31:04 -04:00
xdr4cb.h	nfsd: implement pNFS layout recalls	2015-02-02 18:09:43 +01:00
xdr.h	nfsd: handle vfs_getattr errors in acl protocol	2013-02-26 02:46:09 -05:00