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linux/fs/nfs
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Chuck Lever 8dcbec6d20 NFSv4.1: Handle EXCHGID4_FLAG_CONFIRMED_R during NFSv4.1 migration 
Transparent State Migration copies a client's lease state from the
server where a filesystem used to reside to the server where it now
resides. When an NFSv4.1 client first contacts that destination
server, it uses EXCHANGE_ID to detect trunking relationships.

The lease that was copied there is returned to that client, but the
destination server sets EXCHGID4_FLAG_CONFIRMED_R when replying to
the client. This is because the lease was confirmed on the source
server (before it was copied).

Normally, when CONFIRMED_R is set, a client purges the lease and
creates a new one. However, that throws away the entire benefit of
Transparent State Migration.

Therefore, the client must not purge that lease when it is possible
that Transparent State Migration has occurred.

Reported-by: Xuan Qi <xuan.qi@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Xuan Qi <xuan.qi@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-07-13 16:00:12 -04:00
..
blocklayout lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
filelayout PNFS for stateid errors retry against MDS first 2017-07-13 16:00:08 -04:00
flexfilelayout PNFS for stateid errors retry against MDS first 2017-07-13 16:00:08 -04:00
cache_lib.c sunrpc/nfs: cleanup procfs/pipefs entry in cache_detail 2017-02-08 17:02:45 -05:00
cache_lib.h
callback.c sunrpc: mark all struct svc_version instances as const 2017-07-13 15:58:03 -04:00
callback.h nfs: don't cast callback decode/proc/encode routines 2017-07-13 15:57:56 -04:00
callback_proc.c nfs: don't cast callback decode/proc/encode routines 2017-07-13 15:57:56 -04:00
callback_xdr.c sunrpc: mark all struct svc_version instances as const 2017-07-13 15:58:03 -04:00
client.c NFS client updates for Linux 4.12 2017-05-10 13:03:38 -07:00
delegation.c NFSv4: Optimise away forced revalidation when we know the attributes are OK 2016-12-01 17:21:37 -05:00
delegation.h NFSv4: nfs_inode_find_state_and_recover() should check all stateids 2016-09-27 14:34:35 -04:00
dir.c NFS: guard against confused server in nfs_atomic_open() 2017-07-13 16:00:08 -04:00
direct.c NFS client updates for Linux 4.12 2017-05-10 13:03:38 -07:00
dns_resolve.c NFS: Enabling v4.2 should not recompile nfsd and lockd 2013-11-19 16:20:40 -05:00
dns_resolve.h
file.c NFSv4: Don't special case "launder" 2017-04-26 13:03:04 -04:00
fscache-index.c NFS: Fabricate fscache server index key correctly 2014-09-25 21:25:18 -04:00
fscache.c nfs: define nfs_inc_fscache_stats and using it as possible 2014-11-24 20:08:47 -05:00
fscache.h NFS: Use i_writecount to control whether to get an fscache cookie in nfs_open() 2013-09-27 18:40:25 +01:00
getroot.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
inode.c NFS: check for nfs_refresh_inode() errors in nfs_fhget() 2017-07-13 16:00:09 -04:00
internal.h NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
io.c NFS: Do not serialise O_DIRECT reads and writes 2016-07-05 19:11:04 -04:00
iostat.h nfs: define nfs_inc_fscache_stats and using it as possible 2014-11-24 20:08:47 -05:00
Kconfig nfs: remove the objlayout driver 2017-04-20 15:51:23 -04:00
Makefile nfs: remove the objlayout driver 2017-04-20 15:51:23 -04:00
mount_clnt.c sunrpc: mark all struct rpc_procinfo instances as const 2017-07-13 15:57:57 -04:00
namespace.c NFS: Use ERR_CAST() to avoid cross-structure cast 2017-05-28 10:11:47 -07:00
netns.h netns: make struct pernet_operations::id unsigned int 2016-11-18 10:59:15 -05:00
nfs.h
nfs2super.c
nfs2xdr.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
nfs3_fs.h nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3acl.c posix_acl: Inode acl caching fixes 2016-03-31 00:30:15 -04:00
nfs3client.c NFS: Remove unused authflavour parameter from nfs_get_client() 2016-12-01 17:46:32 -05:00
nfs3proc.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
nfs3super.c nfsv3: introduce nfs3_set_ds_client 2015-02-03 11:06:34 -08:00
nfs3xdr.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
nfs4_fs.h sunrpc: mark all struct svc_version instances as const 2017-07-13 15:58:03 -04:00
nfs4client.c NFSv4.1: Handle EXCHGID4_FLAG_CONFIRMED_R during NFSv4.1 migration 2017-07-13 16:00:12 -04:00
nfs4file.c NFSv4: add flock_owner to open context 2016-12-01 17:57:27 -05:00
nfs4getroot.c NFS: Clean up nfs4_get_rootfh() 2017-04-20 13:39:35 -04:00
nfs4idmap.c NFS: silence a uninitialized variable warning 2017-07-13 15:58:28 -04:00
nfs4idmap.h NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4namespace.c NFS: Remove extra dprintk()s from nfs4namespace.c 2017-04-20 13:39:35 -04:00
nfs4proc.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
nfs4renewd.c NFSv4: Set the connection timeout to match the lease period 2017-02-09 14:15:16 -05:00
nfs4session.c NFSv4.1: Fix regression in callback retry handling 2016-12-01 17:21:38 -05:00
nfs4session.h NFS: Make trace_nfs4_setup_sequence() available to NFS v4.0 2017-01-30 13:14:50 -05:00
nfs4state.c NFSv4.1: Handle EXCHGID4_FLAG_CONFIRMED_R during NFSv4.1 migration 2017-07-13 16:00:12 -04:00
nfs4super.c NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4sysctl.c nfs: do not initialise statics to 0 2015-12-28 09:57:15 -05:00
nfs4trace.c pNFS: Modify pnfs_update_layout tracepoints to use layout stateid 2015-12-28 09:57:14 -05:00
nfs4trace.h NFS: Make trace_nfs4_setup_sequence() available to NFS v4.0 2017-01-30 13:14:50 -05:00
nfs4xdr.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
nfs42.h NFS: Add COPY nfs operation 2016-05-17 15:47:55 -04:00
nfs42proc.c NFS fix COMMIT after COPY 2017-05-24 07:52:48 -04:00
nfs42xdr.c nfs: fix decoder callback prototypes 2017-07-13 15:57:56 -04:00
nfsroot.c nfsroot: make nfsroot to accept the 1024 bytes long directory name 2015-10-21 15:49:19 -05:00
nfstrace.c NFSv4: Allow tracing of NFSv4 fsync calls 2015-03-27 12:39:34 -04:00
nfstrace.h NFS client updates for Linux 4.8 2016-07-30 16:33:25 -07:00
pagelist.c NFS: Fix initialization of nfs_page_array->npages 2017-07-13 15:58:06 -04:00
pnfs.c pnfs: Fix the check for requests in range of layout segment 2017-05-24 07:55:02 -04:00
pnfs.h pnfs: Fix the check for requests in range of layout segment 2017-05-24 07:55:02 -04:00
pnfs_dev.c NFSv4.1: Don't cache deviceids that have no notifications 2015-03-27 12:32:24 -04:00
pnfs_nfs.c pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits 2017-05-03 12:29:41 -04:00
proc.c NFS: convert flags to bool 2017-07-13 15:58:04 -04:00
read.c NFS: move rw_mode to nfs_pageio_header 2017-04-20 14:00:41 -04:00
super.c nfs: Fix fscache stat printing in nfs_show_stats() 2017-07-13 15:58:27 -04:00
symlink.c vfs: remove ".readlink = generic_readlink" assignments 2016-12-09 16:45:04 +01:00
sysctl.c nfs: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
unlink.c NFS: nfs_rename() - revalidate directories on -ERESTARTSYS 2017-07-13 15:58:04 -04:00
write.c NFS: Fix commit policy for non-blocking calls to nfs_write_inode() 2017-07-13 15:58:05 -04:00