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910ac68a2b
linux/fs/nfs
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Trond Myklebust 910ac68a2b NFSv4.1: Return NFS4ERR_BADSESSION to callbacks during session resets 
If the client is in the process of resetting the session when it receives
a callback, then returning NFS4ERR_DELAY may cause a deadlock with the
DESTROY_SESSION call.

Basically, if the client returns NFS4ERR_DELAY in response to the
CB_SEQUENCE call, then the server is entitled to believe that the
client is busy because it is already processing that call. In that
case, the server is perfectly entitled to respond with a
NFS4ERR_BACK_CHAN_BUSY to any DESTROY_SESSION call.

Fix this by having the client reply with a NFS4ERR_BADSESSION in
response to the callback if it is resetting the session.

Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-08-04 11:55:35 -04:00
..
blocklayout nfs: add missing prefetch.h include 2011-08-04 11:54:25 -04:00
objlayout pnfs-obj: Fix the comp_index != 0 case 2011-08-04 11:54:48 -04:00
cache_lib.c switch vfs_path_lookup() to struct path 2011-07-20 01:44:14 -04:00
cache_lib.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
callback_proc.c NFSv4.1: Return NFS4ERR_BADSESSION to callbacks during session resets 2011-08-04 11:55:35 -04:00
callback_xdr.c NFSv4.1: Fix the callback 'highest_used_slotid' behaviour 2011-08-04 11:55:35 -04:00
callback.c NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
callback.h NFSv4.1: Fix the callback 'highest_used_slotid' behaviour 2011-08-04 11:55:35 -04:00
client.c pnfsblock: add device operations 2011-07-31 12:18:16 -04:00
delegation.c NFSv4: Don't use the delegation->inode in nfs_mark_return_delegation() 2011-07-25 15:37:29 -04:00
delegation.h NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
dir.c Additional readdir cookie loop information 2011-07-30 14:37:14 -04:00
direct.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
dns_resolve.c sunrpc: use seconds since boot in expiry cache 2010-09-07 19:21:20 -04:00
dns_resolve.h NFS: Use kernel DNS resolver [ver #2] 2010-08-11 17:11:28 +00:00
file.c fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
fscache-index.c
fscache.c FS-Cache: Add a helper to bulk uncache pages on an inode 2011-07-07 13:21:56 -07:00
fscache.h NFS: Propagate 'fsc' mount option through automounts 2009-09-23 14:36:39 -04:00
getroot.c Merge branch 'nfs-for-2.6.39' into nfs-for-next 2011-03-24 17:03:14 -04:00
idmap.c treewide: remove duplicate includes 2011-06-20 16:08:19 +02:00
inode.c nfs_open_context doesn't need struct path either 2011-07-20 01:43:44 -04:00
internal.h NFS: Clean up - simplify the switch to read/write-through-MDS 2011-07-15 09:12:22 -04:00
iostat.h NFS: Squelch compiler warning in nfs_add_server_stats() 2010-05-14 15:09:31 -04:00
Kconfig pnfsblock: add blocklayout Kconfig option, Makefile, and stubs 2011-07-31 12:18:15 -04:00
Makefile pnfsblock: add blocklayout Kconfig option, Makefile, and stubs 2011-07-31 12:18:15 -04:00
mount_clnt.c NFS: Remove redundant unlikely() 2010-12-21 11:51:23 -05:00
namespace.c NFS: Add SECINFO_NO_NAME procedure 2011-07-12 13:40:27 -04:00
nfs2xdr.c Merge branch 'bugfixes' into nfs-for-2.6.38 2011-01-10 14:48:02 -05:00
nfs3acl.c switch posix_acl_create() to umode_t * 2011-08-01 02:09:42 -04:00
nfs3proc.c switch posix_acl_create() to umode_t * 2011-08-01 02:09:42 -04:00
nfs3xdr.c NFS: Fix "kernel BUG at fs/nfs/nfs3xdr.c:1338!" 2011-01-25 15:24:47 -05:00
nfs4_fs.h pnfs: ask for layout_blksize and save it in nfs_server 2011-07-31 12:18:15 -04:00
nfs4filelayout.c pnfs: save layoutcommit lwb at layout header 2011-07-31 12:18:14 -04:00
nfs4filelayout.h NFSv4.1: do not use deviceids after MDS clientid invalidation 2011-07-12 13:40:29 -04:00
nfs4filelayoutdev.c NFS: fix comment 2011-07-12 13:40:27 -04:00
nfs4namespace.c nfs: nfs_do_{ref,sub}mount() superblock argument is redundant 2011-03-16 16:48:06 -04:00
nfs4proc.c pnfs: cleanup_layoutcommit 2011-07-31 12:18:15 -04:00
nfs4renewd.c NFSv4.1: new flag for state renewal check 2011-03-11 15:38:41 -05:00
nfs4state.c Merge branch 'master' into devel and apply fixup from Stephen Rothwell: 2011-07-25 14:53:52 -04:00
nfs4xdr.c pnfs: cleanup_layoutcommit 2011-07-31 12:18:15 -04:00
nfsroot.c NFS: Revert NFSROOT default mount options 2011-05-27 17:42:47 -04:00
pagelist.c Merge branch 'master' into devel and apply fixup from Stephen Rothwell: 2011-07-25 14:53:52 -04:00
pnfs_dev.c NFSv4.1: do not use deviceids after MDS clientid invalidation 2011-07-12 13:40:29 -04:00
pnfs.c pnfs: cleanup_layoutcommit 2011-07-31 12:18:15 -04:00
pnfs.h NFS: Re-enable compilation of nfs with !CONFIG_NFS_V4 || !CONFIG_NFS_V4_1 2011-07-31 14:27:04 -10:00
proc.c NFS: lookup supports alternate client 2011-03-24 13:52:41 -04:00
read.c Merge branch 'master' into devel and apply fixup from Stephen Rothwell: 2011-07-25 14:53:52 -04:00
super.c switch vfs_path_lookup() to struct path 2011-07-20 01:44:14 -04:00
symlink.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sysctl.c NFS: new idmapper 2010-10-07 18:48:49 -04:00
unlink.c nfs: don't use d_move in nfs_async_rename_done 2011-07-25 15:00:21 -04:00
write.c Merge branch 'nfs-for-3.1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs 2011-07-27 13:23:02 -07:00