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kernel-fxtec-pro1x/fs/nfs
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Fred Isaman 3851172244 pnfs: avoid incorrect use of layout stateid 
The code could violate the following from RFC5661, section 12.5.3:
"Once a client has no more layouts on a file, the layout stateid is no
longer valid and MUST NOT be used."

This can occur when a layout already has a lseg, starts another
non-everlapping LAYOUTGET, and a CB_LAYOUTRECALL for the existing lseg
is processed before we hit pnfs_layout_process().

Solve by setting, each time the client has no more lsegs for a file, a
flag which blocks further use of the layout and triggers its removal.

This also fixes a second bug which occurs in the same instance as
above.  If we actually use pnfs_layout_process, we add the new lseg to
the layout, but the layout has been removed from the nfs_client list
by the intervening CB_LAYOUTRECALL and will not be added back.  Thus
the newly acquired lseg will not be properly returned in the event of
a subsequent CB_LAYOUTRECALL.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-03-11 15:38:39 -05:00
..
cache_lib.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
cache_lib.h NFS: Add a dns resolver for use with NFSv4 referrals and migration 2009-08-19 18:22:15 -04:00
callback.c NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
callback.h NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
callback_proc.c NFS fix cb_sequence error processing 2011-01-25 15:26:51 -05:00
callback_xdr.c NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
client.c NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
delegation.c NFS: Fix an NFS client lockdep issue 2011-01-28 13:37:09 -05:00
delegation.h NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
dir.c NFS: Use d_automount() rather than abusing follow_link() 2011-01-15 20:07:34 -05:00
direct.c NFS: Fix "kernel BUG at fs/aio.c:554!" 2011-01-25 15:24:47 -05:00
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 NFS: Fix fcntl F_GETLK not reporting some conflicts 2010-12-07 19:30:43 -05:00
fscache-index.c
fscache.c NFS: Squelch compiler warning 2010-05-14 15:09:31 -04:00
fscache.h NFS: Propagate 'fsc' mount option through automounts 2009-09-23 14:36:39 -04:00
getroot.c switch nfs to ->s_d_op 2011-01-12 20:02:45 -05:00
idmap.c nfs: fix mispelling of idmap CONFIG symbol 2011-01-04 13:10:39 -05:00
inode.c (try3-resend) Fix nfs_compat_user_ino64 so it doesn't cause problems if bit 31 or 63 are set in fileid 2011-03-10 15:04:58 -05:00
internal.h NFS do not find client in NFSv4 pg_authenticate 2011-01-25 15:26:51 -05:00
iostat.h NFS: Squelch compiler warning in nfs_add_server_stats() 2010-05-14 15:09:31 -04:00
Kconfig lockd: push lock_flocks down 2010-10-27 21:39:39 +02:00
Makefile NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure 2010-10-24 18:07:11 -04:00
mount_clnt.c NFS: Remove redundant unlikely() 2010-12-21 11:51:23 -05:00
namespace.c Unexport do_add_mount() and add in follow_automount(), not ->d_automount() 2011-01-15 20:07:48 -05:00
nfs2xdr.c Merge branch 'bugfixes' into nfs-for-2.6.38 2011-01-10 14:48:02 -05:00
nfs3acl.c NFS: Prevent memory allocation failure in nfsacl_encode() 2011-01-25 15:24:47 -05:00
nfs3proc.c NFS: readdir with vmapped pages 2010-10-23 15:27:35 -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 NFSv4: nfs4_state_mark_reclaim_nograce() should be static 2011-03-11 15:18:36 -05:00
nfs4filelayout.c pnfs: add prefix to struct pnfs_layout_hdr fields 2011-01-06 14:46:31 -05:00
nfs4filelayout.h NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure 2010-10-24 18:07:11 -04:00
nfs4filelayoutdev.c nfs: add kmalloc return value check in decode_and_add_ds 2011-03-10 15:04:55 -05:00
nfs4namespace.c NFSv4: Fix up the documentation for nfs_do_refmount 2010-05-14 15:09:29 -04:00
nfs4proc.c nfs4: remove duplicated #include 2011-03-11 15:18:37 -05:00
nfs4renewd.c NFS: Move cl_delegations to the nfs_server struct 2011-01-06 14:57:46 -05:00
nfs4state.c NFSv4: nfs4_state_mark_reclaim_nograce() should be static 2011-03-11 15:18:36 -05:00
nfs4xdr.c NFSv4: remove duplicate clientid in struct nfs_client 2011-03-10 15:05:00 -05:00
nfsroot.c NFS: NFSROOT should default to "proto=udp" 2011-03-11 15:38:07 -05:00
pagelist.c nfs: Take advantage of kmem_cache_zalloc() in nfs_page_alloc() 2010-12-21 11:51:24 -05:00
pnfs.c pnfs: avoid incorrect use of layout stateid 2011-03-11 15:38:39 -05:00
pnfs.h pnfs: layout roc code 2011-01-06 14:46:32 -05:00
proc.c NFS: Don't leak in nfs_proc_symlink() 2011-01-04 13:10:36 -05:00
read.c nfs: remove extraneous and problematic calls to nfs_clear_request 2010-12-07 23:02:44 -05:00
super.c switch nfs to ->s_d_op 2011-01-12 20:02:45 -05:00
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 SUNRPC: Close a race in __rpc_wait_for_completion_task() 2011-03-10 15:04:52 -05:00
write.c nfs: close NFSv4 COMMIT vs. CLOSE race 2011-03-10 15:04:53 -05:00