OpenE2K/linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
9767feb2c6
linux/fs/nfsd
History
Jeff Layton 9767feb2c6 nfsd: ensure that seqid morphing operations are atomic wrt to copies 
Bruce points out that the increment of the seqid in stateids is not
serialized in any way, so it's possible for racing calls to bump it
twice and end up sending the same stateid. While we don't have any
reports of this problem it _is_ theoretically possible, and could lead
to spurious state recovery by the client.

In the current code, update_stateid is always followed by a memcpy of
that stateid, so we can combine the two operations. For better
atomicity, we add a spinlock to the nfs4_stid and hold that when bumping
the seqid and copying the stateid.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2015-10-23 15:57:33 -04:00
..
acl.h
auth.c
auth.h
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
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
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
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: ensure that seqid morphing operations are atomic wrt to copies 2015-10-23 15:57:33 -04:00
nfs4xdr.c NFSD: Return word2 bitmask if setting security label in OPEN/CREATE 2015-08-31 16:16:40 -04:00
nfscache.c nfsd: drop null test before destroy functions 2015-10-12 17:31:04 -04:00
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
stats.h
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
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