The following set of patches fix known issues with the 2.6.25-rc1 NFS client
code, and significantly enhance the support for NFSv4.
- linux-2.6.25-001-fix_write_race.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Thu, 7 Feb 2008 17:24:07 -0500
Subject: NFS: Fix a potential file corruption issue when writing
If the inode is flagged as having an invalid mapping, then we can't rely on the
PageUptodate() flag. Ensure that we don't use the "anti-fragmentation" write
optimisation in nfs_updatepage(), since that will cause NFS to write out areas of the
page that are no longer guaranteed to be up to date.
A potential corruption could occur in the following scenario:
client 1 client 2 ===============
=============== fd=open("f",O_CREAT|O_WRONLY,0644); write(fd,"fubar\n",6); //
cache last page close(fd); fd=open("f",O_WRONLY|O_APPEND); write(fd,"foo\n",4);
close(fd);
fd=open("f",O_WRONLY|O_APPEND); write(fd,"bar\n",4); close(fd); ----- The bug may
lead to the file "f" reading 'fubar\n\0\0\0\nbar\n' because client 2 does not update
the cached page after re-opening the file for write. Instead it keeps it marked as
PageUptodate() until someone calls invaldate_inode_pages2() (typically by calling
read()).
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-002-nfs_use_gfp_nofs_preloads_for_radix_tree_insertion.dif:
-
From: Nick Piggin <npiggin@suse.de>
Date: Mon, 04 Feb 2008 23:48:37 -0800
Subject: nfs: use GFP_NOFS preloads for radix-tree insertion
NFS should use GFP_NOFS mode radix tree preloads rather than GFP_ATOMIC allocations
at radix-tree insertion-time. This is important to reduce the atomic memory
requirement.
Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Trond Myklebust
<trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields"
<bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-003-add_lookup_mountpoint_flag.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Sat, 2 Feb 2008 17:33:48 -0500
Subject: VFS: Add an intent for LOOKUP_MOUNT
This will allow automounters etc to signal to a filesystem that the lookup is
intended for a 'mount' request, and that we shouldn't trigger any automounter
traps/upcalls.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-004-nfs_make_access_return_attributes.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 10 Aug 2007 17:45:12 -0400
Subject: NFS: Make rpc_ops->access return attributes to the caller
Now that both NFSv3 and NFSv4 return attributes as part of the ACCESS call, we can
move the common code into nfs_do_access().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-005-add_nfs_do_uncached_access.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 10 Aug 2007 17:45:12 -0400
Subject: NFS: Split the cached and uncached ACCESS calls into separate
functions
This will be used by the NFSv3 "atomic open()" optimisation.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-006-add_permission_method.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Mon, 13 Aug 2007 08:02:31 -0400
Subject: NFS: Add an NFS version specific permission() method.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-007-cleanup_nfs_lookup_revalidate.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 10 Aug 2007 17:45:13 -0400
Subject: NFS: Clean up nfs_lookup_revalidate()
Split it up into components that can easily be called from other functions.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-008-add_nfs_lookup_instantiate_filp.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 10 Aug 2007 18:27:23 -0400
Subject: NFS: Add a helper nfs_lookup_instantiate_filp()
And use it in the NFSv4 atomic open code to ensure that we also set the
nfs_open_context credential to the correct value (i.e. that used in the OPEN call).
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-009-nfs_generic_stateless_open.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 10 Aug 2007 18:34:41 -0400
Subject: NFS: Add a generic stateless open function
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-010-nfs_stateless_open_create.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 15 Aug 2007 08:54:43 -0400
Subject: NFS: Add stateless open to NFSv2 and NFSv3 create operations
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-011-optimise_permission_call.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 15 Aug 2007 08:55:47 -0400
Subject: NFS: Optimise NFS permission calls.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-012-optimise_nfs_revalidate_inode.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 15 Aug 2007 12:15:37 -0400
Subject: NFS: Optimise nfs_revalidate_inode()
Instead of serialising calls to nfs_revalidate_inode, we should just be attempting
to ensure that we've updated the attributes.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-013-add_timers_to_wait_queues.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 18 Jul 2007 16:18:52 -0400
Subject: SUNRPC: Add a timer function to wait queues.
This is designed to replace the timeout timer in the individual rpc_tasks. By
putting the timer function in the wait queue, we will eventually be able to reduce the
total number of timers in use by the RPC subsystem.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-014-gss_triple_to_pseudoflavor.dif:
-
From: Andy Adamson <andros@umich.edu>
Date: Fri, 18 May 2007 16:52:39 -0400
Subject: SUNRPC: Add a helper function to convert a GSS triple into
pseudoflavor
Helper function for OP_SECINFO. Return the pseudoflavor for a supported security
mechanism OID, qop, and service. Return RPC_AUTH_MAXFLAVOR upon failure.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-015-nfs_secinfo_xdr.dif:
-
From: Andy Adamson <andros@umich.edu>
Date: Fri, 18 May 2007 16:52:40 -0400
Subject: NFSv4: Add the NFS SECINFO xdr encode/decode routines
Encode and decode routines for OP_SECINFO. Decode routine saves an orderd list of up
to NFS4_SECINFO_MAXFLAVORS server supplied pseudoflavors supported on the client.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-016-nfs_secinfo_proc.dif:
-
From: Andy Adamson <andros@umich.edu>
Date: Fri, 18 May 2007 16:52:44 -0400
Subject: NFSv4: Add the NFS SECINFO proc
Place the secinfo call on the wire
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
- linux-2.6.25-017-dont_retry_immediately.dif:
-
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 18 Jul 2007 10:24:14 -0400
Subject: SUNRPC: Cache rpcsec_gss upcall failures in order to back off retries
Do an exponential back off if the previous upcall failed to return a valid GSS
context.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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