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Trond Myklebust [Fri, 30 Jan 2015 19:21:14 +0000 (14:21 -0500)]
NFSv4.1: Ask for no delegation on OPEN if using O_DIRECT
If we're using NFSv4.1, then we have the ability to let the server know
whether or not we believe that returning a delegation as part of our OPEN
request would be useful.
The feature needs to be used with care, since the client sending the request
doesn't necessarily know how other clients are using that file, and how
they may be affected by the delegation.
For this reason, our initial use of the feature will be to let the server
know when the client believes that handing out a delegation would not be
useful.
The first application for this function is when opening the file using
O_DIRECT.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Tue, 3 Feb 2015 22:13:58 +0000 (17:13 -0500)]
NFS: Add Anna Schumaker as co-maintainer for the NFS client
Anna has essentially been performing the duties of co-maintainer for
the past several years. In recognition of those efforts, I'd like to
add her to the maintainers file.
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 30 Jan 2015 23:12:28 +0000 (18:12 -0500)]
SUNRPC: NULL utsname dereference on NFS umount during namespace cleanup
Fix an Oopsable condition when nsm_mon_unmon is called as part of the
namespace cleanup, which now apparently happens after the utsname
has been freed.
Link: http://lkml.kernel.org/r/20150125220604.090121ae@neptune.home
Reported-by: Bruno Prémont <bonbons@linux-vserver.org>
Cc: stable@vger.kernel.org # 3.18
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Tue, 3 Feb 2015 21:01:27 +0000 (16:01 -0500)]
Merge branch 'flexfiles'
* flexfiles: (53 commits)
pnfs: lookup new lseg at lseg boundary
nfs41: .init_read and .init_write can be called with valid pg_lseg
pnfs: Update documentation on the Layout Drivers
pnfs/flexfiles: Add the FlexFile Layout Driver
nfs: count DIO good bytes correctly with mirroring
nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET
nfs: add a helper to set NFS_ODIRECT_RESCHED_WRITES to direct writes
nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags
nfs/flexfiles: send layoutreturn before freeing lseg
nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSE
nfs41: allow async version layoutreturn
nfs41: add range to layoutreturn args
pnfs: allow LD to ask to resend read through pnfs
nfs: add nfs_pgio_current_mirror helper
nfs: only reset desc->pg_mirror_idx when mirroring is supported
nfs41: add a debug warning if we destroy an unempty layout
pnfs: fail comparison when bucket verifier not set
nfs: mirroring support for direct io
nfs: add mirroring support to pgio layer
pnfs: pass ds_commit_idx through the commit path
...
Conflicts:
fs/nfs/pnfs.c
fs/nfs/pnfs.h
Weston Andros Adamson [Fri, 30 Jan 2015 16:01:02 +0000 (11:01 -0500)]
pnfs: lookup new lseg at lseg boundary
Before mirroring support was added, the pageio descriptor's pg_lseg was
set to null when an RPC was sent. Because of this, pg_init was called
at lseg boundaries with pg_lseg = NULL, and it could be set to the new
lseg.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Peng Tao [Sat, 24 Jan 2015 14:14:52 +0000 (22:14 +0800)]
nfs41: .init_read and .init_write can be called with valid pg_lseg
With pgio refactoring in v3.15, .init_read and .init_write can be
called with valid pgio->pg_lseg. file layout was fixed at that time
by commit
c6194271f (pnfs: filelayout: support non page aligned
layouts). But the generic helper still needs to be fixed.
Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Tom Haynes [Mon, 12 Jan 2015 19:51:45 +0000 (11:51 -0800)]
pnfs: Update documentation on the Layout Drivers
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Tom Haynes [Thu, 11 Dec 2014 22:02:04 +0000 (17:02 -0500)]
pnfs/flexfiles: Add the FlexFile Layout Driver
The flexfile layout is a new layout that extends the
file layout. It is currently being drafted as a specification at
https://datatracker.ietf.org/doc/draft-ietf-nfsv4-layout-types/
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Tao Peng <bergwolf@primarydata.com>
Peng Tao [Mon, 19 Jan 2015 04:41:16 +0000 (12:41 +0800)]
nfs: count DIO good bytes correctly with mirroring
When resending to MDS, we might resend multiple mirroring
requests to MDS. As a result, nfs_direct_good_bytes() ends
up counting bytes multiple times, causing application to
get wrong return results in read/write syscalls.
Fix it by tracking start of a dreq and checking the range of
pgio header.
Cc: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Peng Tao [Mon, 1 Dec 2014 00:22:23 +0000 (08:22 +0800)]
nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET
Also take care to stop waiting if someone clears retry bit.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Peng Tao [Mon, 1 Dec 2014 00:22:21 +0000 (08:22 +0800)]
nfs: add a helper to set NFS_ODIRECT_RESCHED_WRITES to direct writes
To allow pnfs LD to ask direct writes to be resend.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Peng Tao [Mon, 1 Dec 2014 00:22:18 +0000 (08:22 +0800)]
nfs41: add NFS_LAYOUT_RETRY_LAYOUTGET to layout header flags
Use it to indicate that LD wants to retry layoutget. LD can set
it whenever it wants the common pnfs code to return and retry
pnfs path through a new layout.
The bit gets cleared when client does a new layoutget, when client
closes the file (ROC case), or when kernel needs to evict the inode
(non-ROC case).
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Peng Tao [Mon, 20 Oct 2014 06:44:38 +0000 (14:44 +0800)]
nfs/flexfiles: send layoutreturn before freeing lseg
Otherwise we'll lose error tracking information when
encoding layoutreturn.
pnfs_put_lseg may be called from rpc callbacks. So we should not
call pnfs_send_layoutreturn directly because it can deadlock in
the rpc layer.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 17 Nov 2014 01:30:41 +0000 (09:30 +0800)]
nfs41: introduce NFS_LAYOUT_RETURN_BEFORE_CLOSE
When it is set, generic pnfs would try to send layoutreturn right
before last close/delegation_return regard less NFS_LAYOUT_ROC is
set or not. LD can then make sure layoutreturn is always sent
rather than being omitted.
The difference against NFS_LAYOUT_RETURN is that
NFS_LAYOUT_RETURN_BEFORE_CLOSE does not block usage of the layout so
LD can set it and expect generic layer to try pnfs path at the
same time.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 17 Nov 2014 01:30:40 +0000 (09:30 +0800)]
nfs41: allow async version layoutreturn
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 17 Nov 2014 01:30:36 +0000 (09:30 +0800)]
nfs41: add range to layoutreturn args
So that callers can specify which range to return.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 10 Nov 2014 00:35:38 +0000 (08:35 +0800)]
pnfs: allow LD to ask to resend read through pnfs
If current IO cannot be completed due to some transient errors,
LD may want to ask generic layer to resend the request through
pnfs again.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 10 Nov 2014 00:35:35 +0000 (08:35 +0800)]
nfs: add nfs_pgio_current_mirror helper
Let it return current nfs_pgio_mirror in use depending on pg_mirror_count.
For read, we always use pg_mirrors[0], so this effectively gives us freedom
to use pg_mirror_idx to track the actual mirror to read from through out the
IO stack.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Mon, 10 Nov 2014 00:35:34 +0000 (08:35 +0800)]
nfs: only reset desc->pg_mirror_idx when mirroring is supported
so that we don't reset desc->pg_mirror_idx for read unnecessarily.
Remove WARN_ON_ONCE from __nfs_pageio_add_request to allow LD to
set pg_mirror_idx for read where pg_mirror_count is always 1.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Fri, 10 Oct 2014 15:25:46 +0000 (23:25 +0800)]
nfs41: add a debug warning if we destroy an unempty layout
So that we can detect the case if some layout segments are still
pinned which is surely a bug that we need to fix.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Weston Andros Adamson [Wed, 1 Oct 2014 16:58:25 +0000 (12:58 -0400)]
pnfs: fail comparison when bucket verifier not set
This skips the WARN_ON_ONCE, but doesnt change behavior (the memcmp would
fail).
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Weston Andros Adamson [Fri, 19 Sep 2014 16:48:33 +0000 (12:48 -0400)]
nfs: mirroring support for direct io
The current mirroring code only notices short writes to the first
mirror. This patch keeps per-mirror byte counts and only considers
a byte to be written once all mirrors report so.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Weston Andros Adamson [Fri, 19 Sep 2014 14:55:07 +0000 (10:55 -0400)]
nfs: add mirroring support to pgio layer
This patch adds mirrored write support to the pgio layer. The default
is to use one mirror, but pgio callers may define callbacks to change
this to any value up to the (arbitrarily selected) limit of 16.
The basic idea is to break out members of nfs_pageio_descriptor that cannot
be shared between mirrored DSes and put them in a new structure.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Weston Andros Adamson [Fri, 5 Sep 2014 22:20:21 +0000 (18:20 -0400)]
pnfs: pass ds_commit_idx through the commit path
Pass ds_commit_idx through the nfs commit path. It's used to select
the commit bucket when using pnfs and is ignored when not using pnfs.
Several functions had to be changed: nfs_retry_commit,
nfs_mark_request_commit, pnfs_mark_request_commit and the pnfs layout
driver .mark_request_commit functions.
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Weston Andros Adamson [Tue, 16 Sep 2014 21:35:51 +0000 (17:35 -0400)]
nfs: rename pgio header ds_idx to ds_commit_idx
'ds_commit_idx' is a better name - it is used to select the right
commit bucket for pnfs.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Weston Andros Adamson [Fri, 5 Sep 2014 20:34:29 +0000 (16:34 -0400)]
nfs: handle overlapping reqs in lock_and_join
This is needed for mirrored DS support, where multuple requests
cover the same range.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Weston Andros Adamson [Wed, 10 Sep 2014 19:48:01 +0000 (15:48 -0400)]
pnfs: release lseg in pnfs_generic_pg_cleanup
This is needed to support mirrored writes - the first write can't just
trash the lseg, we need to keep it around until all mirrors have
written.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Weston Andros Adamson [Wed, 10 Sep 2014 19:44:18 +0000 (15:44 -0400)]
nfs: introduce pg_cleanup op for pgio descriptors
Add a new operation to nfs_pageio_ops that is called on nfs_pageio_complete.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:29 +0000 (00:53 +0800)]
nfs/filelayout: use pnfs_error_mark_layout_for_return
Instead of calling layoutreturn directly, call pnfs_error_mark_layout_for_return
to mark layouts for return and let generic code return layout when
layout segments are freed.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Conflicts:
fs/nfs/filelayout/filelayout.c
Peng Tao [Fri, 5 Sep 2014 16:53:26 +0000 (00:53 +0800)]
nfs41: clear NFS_LAYOUT_RETURN if layoutreturn is sent or failed to send
So that pnfs path is not disabled for ever.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:25 +0000 (00:53 +0800)]
nfs41: send layoutreturn in last put_lseg
If current lseg is the last lseg marked with NFS_LSEG_LAYOUTRETURN,
send layoutreturn.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:24 +0000 (00:53 +0800)]
nfs41: don't use a layout if it is marked for returning
And if we are to return the same type of layouts, don't bother
sending more layoutgets.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:23 +0000 (00:53 +0800)]
nfs41: add a helper to mark layout for return
It marks all matching layout segments as NFS_LSEG_LAYOUTRETURN,
which is an indicator for pnfs_put_lseg() to send layoutreturn,
and also prevents pnfs_update_layout() from using the returning
segments. Once it is set, it never gets cleared.
It also sets proper io failure bit so that pnfs path can be retried
after PNFS_LAYOUTGET_RETRY_TIMEOUT second.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:22 +0000 (00:53 +0800)]
nfs41: make a helper function to send layoutreturn
It allows to specify different iomode to return.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 5 Sep 2014 16:53:21 +0000 (00:53 +0800)]
nfs41: pass iomode through layoutreturn args
So that it is possible to return a specific iomode layouts.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Wed, 27 Aug 2014 02:47:14 +0000 (10:47 +0800)]
nfs: save server READ/WRITE/COMMIT status
Flexfiles layout would want to use them to report DS IO status.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 22 Aug 2014 09:37:41 +0000 (17:37 +0800)]
nfs41: serialize first layoutget of a file
Per RFC 5661 Errata 3208:
| A client MAY always forget its layout state and associated
| layout stateid at any time (See also section 12.5.5.1).
| In such case, the client MUST use a non-layout stateid for the next
| LAYOUTGET operation. This will signal the server that the client has
| no more layouts on the file and its respective layout state can be
| released before issuing a new layout in response to LAYOUTGET.
In order to make such a signal unique to server, client needs to serialize
all layoutgets using non-layout stateid. We implement this by serializing
layoutgets when client has no layout segments at hand.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 22 Aug 2014 09:37:40 +0000 (17:37 +0800)]
nfs41: close a small race window when adding new layout to global list
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Thu, 7 Aug 2014 02:12:38 +0000 (10:12 +0800)]
nfs/flexclient: export pnfs_layoutcommit_inode
flexfiles needs to start layoutcommit when necessary
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Peng Tao [Mon, 7 Jul 2014 22:21:10 +0000 (06:21 +0800)]
nfs: set hostname when creating nfsv3 ds connection
lockd assumes hostname exists otherwise kernel oops.
It can be reproduced by following steps:
1. mount flexfile MDS
2. write some files
3. mount DS via nfsv3
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<
ffffffff8134f332>] strlen+0x2/0x20
PGD 0
Oops: 0000 [#1] SMP
Modules linked in: nfsd(F) nfs_layout_flexfiles(F) rpcsec_gss_krb5(F) auth_rpcgss(F) nfsv4(F) dns_resolver(F) nfsv3(F) nfs_acl(F) nfs(F) lockd(F) sunrpc(F) fscache(F) ebtable_nat(F) nf_conntrack_netbios_ns(F) nf_conntrack_broadcast(F) ipt_MASQUERADE(F) ip6table_nat(F) nf_nat_ipv6(F) ip6table_mangle(F) ip6t_REJECT(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) iptable_nat(F) nf_nat_ipv4(F) nf_nat(F) iptable_mangle(F) nf_conntrack_ipv4(F) nf_defrag_ipv4(F) xt_conntrack(F) nf_conntrack(F) ebtable_filter(F) ebtables(F) ip6table_filter(F) ip6_tables(F) bnep(F) snd_ens1371(F) snd_rawmidi(F) snd_ac97_codec(F) btusb(F) ac97_bus(F) snd_seq(F) snd_seq_device(F) snd_pcm(F) ppdev(F) bluetooth(F) 6lowpan_iphc(F) rfkill(F) vmw_balloon(F) snd_timer(F) snd(F) soundcore(F) gameport(F) i2c_piix4(F) e1000(F) vmw_vmci(F) parport_pc(F) parport(F) shpchp(F) uinput(F) xfs(F) libcrc32c(F) vmwgfx(F) ttm(F) drm(F) mptspi(F) scsi_transport_spi(F) mptscsih(F) mptbase(F) i2c_core(F)
CPU: 0 PID: 10397 Comm: mount.nfs Tainted: GF 3.14.7-100.pd_client.001.fc16.x86_64 #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
task:
ffff880008942600 ti:
ffff880007990000 task.ti:
ffff880007990000
RIP: 0010:[<
ffffffff8134f332>] [<
ffffffff8134f332>] strlen+0x2/0x20
RSP: 0018:
ffff880007991aa0 EFLAGS:
00010246
RAX:
0000000000000000 RBX:
ffff880038d39c20 RCX:
0000000000000004
RDX:
0000000000000006 RSI:
0000000000000010 RDI:
0000000000000000
RBP:
ffff880007991b38 R08:
0000000000000000 R09:
0000000000000000
R10:
0000000000014600 R11:
0000000000000400 R12:
ffffffff81cc8580
R13:
0000000000000000 R14:
0000000000000000 R15:
0000000000000004
FS:
00007f90cd2ef880(0000) GS:
ffff88003f600000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
CR2:
0000000000000000 CR3:
0000000001710000 CR4:
00000000001407f0
Stack:
ffffffffa045f52c ffff880001782230 ffff880004141e28 0006880007991ac8
ffffffff816dc14b ffff880000000000 ffff880038d39c20 0000000000000010
0000000481cc0006 0000000000000000 ffffffffa0410be8 000000000000c014
Call Trace:
[<
ffffffffa045f52c>] ? nlmclnt_lookup_host+0x4c/0x2c0 [lockd]
[<
ffffffff816dc14b>] ? _raw_spin_unlock_bh+0x1b/0x20
[<
ffffffffa0410be8>] ? svc_destroy+0xb8/0x140 [sunrpc]
[<
ffffffffa045c323>] nlmclnt_init+0x53/0xc0 [lockd]
[<
ffffffffa047d2dc>] ? nfs_get_client+0x1cc/0x340 [nfs]
[<
ffffffffa047c2e7>] nfs_start_lockd+0xa7/0xd0 [nfs]
[<
ffffffffa047df71>] nfs_create_server+0x181/0x5c0 [nfs]
[<
ffffffffa04460f3>] nfs3_create_server+0x13/0x30 [nfsv3]
[<
ffffffffa048a0bc>] nfs_try_mount+0x21c/0x300 [nfs]
[<
ffffffff811ca32d>] ? __kmalloc_track_caller+0x1ad/0x240
[<
ffffffffa048b677>] ? nfs_fs_mount+0xc37/0xd80 [nfs]
[<
ffffffffa048ad05>] nfs_fs_mount+0x2c5/0xd80 [nfs]
[<
ffffffffa048a830>] ? nfs_clone_super+0x140/0x140 [nfs]
[<
ffffffffa048a240>] ? nfs_clone_sb_security+0x40/0x40 [nfs]
[<
ffffffff811e7e43>] mount_fs+0x43/0x1b0
[<
ffffffff81193100>] ? __alloc_percpu+0x10/0x20
[<
ffffffff812026e6>] vfs_kern_mount+0x76/0x120
[<
ffffffff81204917>] do_mount+0x237/0xa80
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Weston Andros Adamson [Tue, 24 Jun 2014 14:59:52 +0000 (10:59 -0400)]
sunrpc: add rpc_count_iostats_idx
Add a call to tally stats for a task under a different statsidx than
what's contained in the task structure.
This is needed to properly account for pnfs reads/writes when the
DS nfs version != the MDS version.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Trond Myklebust [Sun, 22 Jun 2014 16:55:11 +0000 (12:55 -0400)]
NFSv4.1/NFSv3: Add pNFS callbacks for nfs3_(read|write|commit)_done()
Enable pNFS callbacks to allow flex files to work correctly with a
NFSv3-enabled data server.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Peng Tao [Fri, 13 Jun 2014 15:02:25 +0000 (23:02 +0800)]
nfs: allow to specify cred in nfs_initiate_pgio
so that flexfile layout client can pass in DS credential instead of
using user cred, which will be done in the next patch.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Tue, 10 Jun 2014 21:24:16 +0000 (05:24 +0800)]
nfs4: export nfs4_sequence_done
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Tue, 10 Jun 2014 21:24:15 +0000 (05:24 +0800)]
nfs4: pass slot table to nfs40_setup_sequence
flexclient needs this as there is no nfs_server to DS connection.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Sun, 8 Jun 2014 23:10:14 +0000 (07:10 +0800)]
nfs: allow different protocol in nfs_initiate_commit
pnfs flexfile layout client may want to use NFSv3 ops rather
than the default MDS v4 ops.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Tom Haynes [Mon, 9 Jun 2014 20:12:20 +0000 (13:12 -0700)]
pnfs: Add nfs_rpc_ops in calls to nfs_initiate_pgio
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Peng Tao [Fri, 30 May 2014 10:15:59 +0000 (18:15 +0800)]
nfs41: create NFSv3 DS connection if specified
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 30 May 2014 10:15:58 +0000 (18:15 +0800)]
nfs41: allow LD to choose DS connection version/minor_version
flexfile layout may need to set such when making DS connections.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 30 May 2014 10:15:57 +0000 (18:15 +0800)]
nfsv3: introduce nfs3_set_ds_client
The flexfiles layout wants to create DS connection over NFSv3.
Add nfs3_set_ds_client to allow that to happen.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Fri, 30 May 2014 10:15:55 +0000 (18:15 +0800)]
nfs41: move file layout macros to generic pnfs
They can be reused by flexfile layout as well.
Also add a code such that if read fails on one DS and
there are other DSes available to use, don't resend
through MDS but through pNFS so that client can read
from other DSes.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Thu, 29 May 2014 13:07:00 +0000 (21:07 +0800)]
nfs41: allow LD to choose DS connection auth flavor
flexfile layout may use different auth flavor as specified by MDS.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Thu, 29 May 2014 13:06:58 +0000 (21:06 +0800)]
nfs41: pull nfs4_ds_connect from file layout to generic pnfs
It can be reused by flexfiles layout client.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Thu, 29 May 2014 13:06:59 +0000 (21:06 +0800)]
nfs41: pull decode_ds_addr from file layout to generic pnfs
It can be reused by flexfile layout.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Peng Tao [Thu, 29 May 2014 13:06:57 +0000 (21:06 +0800)]
nfs41: pull data server cache from file layout to generic pnfs
Also pull nfs4_pnfs_ds_addr and nfs4_pnfs_ds to generic pnfs.
They can all be reused by flexfile layout as well.
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
Tom Haynes [Thu, 11 Dec 2014 18:04:55 +0000 (13:04 -0500)]
pnfs: Do not grab the commit_info lock twice when rescheduling writes
Acked-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Tom Haynes [Thu, 11 Dec 2014 20:34:59 +0000 (15:34 -0500)]
pnfs: Prepare for flexfiles by pulling out common code
The flexfilelayout driver will share some common code
with the filelayout driver. This set of changes refactors
that common code out to avoid any module depenencies.
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Trond Myklebust [Tue, 3 Feb 2015 16:53:18 +0000 (11:53 -0500)]
Merge tag 'nfs-rdma-for-3.20' of git://git.linux-nfs.org/projects/anna/nfs-rdma
NFS: Client side changes for RDMA
These patches improve the scalability of the NFSoRDMA client and take large
variables off of the stack. Additionally, the GFP_* flags are updated to
match what TCP uses.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
* tag 'nfs-rdma-for-3.20' of git://git.linux-nfs.org/projects/anna/nfs-rdma: (21 commits)
xprtrdma: Update the GFP flags used in xprt_rdma_allocate()
xprtrdma: Clean up after adding regbuf management
xprtrdma: Allocate zero pad separately from rpcrdma_buffer
xprtrdma: Allocate RPC/RDMA receive buffer separately from struct rpcrdma_rep
xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req
xprtrdma: Allocate RPC send buffer separately from struct rpcrdma_req
xprtrdma: Add struct rpcrdma_regbuf and helpers
xprtrdma: Refactor rpcrdma_buffer_create() and rpcrdma_buffer_destroy()
xprtrdma: Simplify synopsis of rpcrdma_buffer_create()
xprtrdma: Take struct ib_qp_attr and ib_qp_init_attr off the stack
xprtrdma: Take struct ib_device_attr off the stack
xprtrdma: Free the pd if ib_query_qp() fails
xprtrdma: Remove rpcrdma_ep::rep_func and ::rep_xprt
xprtrdma: Move credit update to RPC reply handler
xprtrdma: Remove rl_mr field, and the mr_chunk union
xprtrdma: Remove rpcrdma_ep::rep_ia
xprtrdma: Rename "xprt" and "rdma_connect" fields in struct rpcrdma_xprt
xprtrdma: Clean up hdrlen
xprtrdma: Display XIDs in host byte order
xprtrdma: Modernize htonl and ntohl
...
Dan Carpenter [Tue, 16 Dec 2014 23:52:26 +0000 (02:52 +0300)]
NFS: a couple off by ones
These tests are off by one because if len == sizeof(nfs_export_path)
then we have truncated the name.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Omar Sandoval [Thu, 8 Jan 2015 09:18:30 +0000 (01:18 -0800)]
nfs: prevent truncate on active swapfile
Most filesystems prevent truncation of an active swapfile by way of
inode_newsize_ok, called from inode_change_ok. NFS doesn't call either
from nfs_setattr, presumably because most of these checks are expected
to be done server-side. However, the IS_SWAPFILE check can only be done
client-side, and truncating a swapfile can't possibly be good.
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Jeff Layton [Wed, 14 Jan 2015 18:08:57 +0000 (13:08 -0500)]
nfs: don't call blocking operations while !TASK_RUNNING
Bruce reported seeing this warning pop when mounting using v4.1:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1121 at kernel/sched/core.c:7300 __might_sleep+0xbd/0xd0()
do not call blocking ops when !TASK_RUNNING; state=1 set at [<
ffffffff810ff58f>] prepare_to_wait+0x2f/0x90
Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc fscache ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_timer ppdev joydev snd virtio_console virtio_balloon pcspkr serio_raw parport_pc parport pvpanic floppy soundcore i2c_piix4 virtio_blk virtio_net qxl drm_kms_helper ttm drm virtio_pci virtio_ring ata_generic virtio pata_acpi
CPU: 1 PID: 1121 Comm: nfsv4.1-svc Not tainted 3.19.0-rc4+ #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140709_153950- 04/01/2014
0000000000000000 000000004e5e3f73 ffff8800b998fb48 ffffffff8186ac78
0000000000000000 ffff8800b998fba0 ffff8800b998fb88 ffffffff810ac9da
ffff8800b998fb68 ffffffff81c923e7 00000000000004d9 0000000000000000
Call Trace:
[<
ffffffff8186ac78>] dump_stack+0x4c/0x65
[<
ffffffff810ac9da>] warn_slowpath_common+0x8a/0xc0
[<
ffffffff810aca65>] warn_slowpath_fmt+0x55/0x70
[<
ffffffff810ff58f>] ? prepare_to_wait+0x2f/0x90
[<
ffffffff810ff58f>] ? prepare_to_wait+0x2f/0x90
[<
ffffffff810dd2ad>] __might_sleep+0xbd/0xd0
[<
ffffffff8124c973>] kmem_cache_alloc_trace+0x243/0x430
[<
ffffffff810d941e>] ? groups_alloc+0x3e/0x130
[<
ffffffff810d941e>] groups_alloc+0x3e/0x130
[<
ffffffffa0301b1e>] svcauth_unix_accept+0x16e/0x290 [sunrpc]
[<
ffffffffa0300571>] svc_authenticate+0xe1/0xf0 [sunrpc]
[<
ffffffffa02fc564>] svc_process_common+0x244/0x6a0 [sunrpc]
[<
ffffffffa02fd044>] bc_svc_process+0x1c4/0x260 [sunrpc]
[<
ffffffffa03d5478>] nfs41_callback_svc+0x128/0x1f0 [nfsv4]
[<
ffffffff810ff970>] ? wait_woken+0xc0/0xc0
[<
ffffffffa03d5350>] ? nfs4_callback_svc+0x60/0x60 [nfsv4]
[<
ffffffff810d45bf>] kthread+0x11f/0x140
[<
ffffffff810ea815>] ? local_clock+0x15/0x30
[<
ffffffff810d44a0>] ? kthread_create_on_node+0x250/0x250
[<
ffffffff81874bfc>] ret_from_fork+0x7c/0xb0
[<
ffffffff810d44a0>] ? kthread_create_on_node+0x250/0x250
---[ end trace
675220a11e30f4f2 ]---
nfs41_callback_svc does most of its work while in TASK_INTERRUPTIBLE,
which is just wrong. Fix that by finishing the wait immediately if we've
found that the list has something on it.
Also, we don't expect this kthread to accept signals, so we should be
using a TASK_UNINTERRUPTIBLE sleep instead. That however, opens us up
hung task warnings from the watchdog, so have the schedule_timeout
wake up every 60s if there's no callback activity.
Reported-by: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Chuck Lever [Mon, 26 Jan 2015 22:11:47 +0000 (17:11 -0500)]
xprtrdma: Update the GFP flags used in xprt_rdma_allocate()
Reflect the more conservative approach used in the socket transport's
version of this transport method. An RPC buffer allocation should
avoid forcing not just FS activity, but any I/O.
In particular, two recent changes missed updating xprtrdma:
- Commit
c6c8fe79a83e ("net, sunrpc: suppress allocation warning ...")
- Commit
a564b8f03986 ("nfs: enable swap on NFS")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:41 +0000 (11:04 -0500)]
xprtrdma: Clean up after adding regbuf management
rpcrdma_{de}register_internal() are used only in verbs.c now.
MAX_RPCRDMAHDR is no longer used and can be removed.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:33 +0000 (11:04 -0500)]
xprtrdma: Allocate zero pad separately from rpcrdma_buffer
Use the new rpcrdma_alloc_regbuf() API to shrink the amount of
contiguous memory needed for a buffer pool by moving the zero
pad buffer into a regbuf.
This is for consistency with the other uses of internally
registered memory.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:25 +0000 (11:04 -0500)]
xprtrdma: Allocate RPC/RDMA receive buffer separately from struct rpcrdma_rep
The rr_base field is currently the buffer where RPC replies land.
An RPC/RDMA reply header lands in this buffer. In some cases an RPC
reply header also lands in this buffer, just after the RPC/RDMA
header.
The inline threshold is an agreed-on size limit for RDMA SEND
operations that pass from server and client. The sum of the
RPC/RDMA reply header size and the RPC reply header size must be
less than this threshold.
The largest RDMA RECV that the client should have to handle is the
size of the inline threshold. The receive buffer should thus be the
size of the inline threshold, and not related to RPCRDMA_MAX_SEGS.
RPC replies received via RDMA WRITE (long replies) are caught in
rq_rcv_buf, which is the second half of the RPC send buffer. Ie,
such replies are not involved in any way with rr_base.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:16 +0000 (11:04 -0500)]
xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req
The rl_base field is currently the buffer where each RPC/RDMA call
header is built.
The inline threshold is an agreed-on size limit to for RDMA SEND
operations that pass between client and server. The sum of the
RPC/RDMA header size and the RPC header size must be less than or
equal to this threshold.
Increasing the r/wsize maximum will require MAX_SEGS to grow
significantly, but the inline threshold size won't change (both
sides agree on it). The server's inline threshold doesn't change.
Since an RPC/RDMA header can never be larger than the inline
threshold, make all RPC/RDMA header buffers the size of the
inline threshold.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:08 +0000 (11:04 -0500)]
xprtrdma: Allocate RPC send buffer separately from struct rpcrdma_req
Because internal memory registration is an expensive and synchronous
operation, xprtrdma pre-registers send and receive buffers at mount
time, and then re-uses them for each RPC.
A "hardway" allocation is a memory allocation and registration that
replaces a send buffer during the processing of an RPC. Hardway must
be done if the RPC send buffer is too small to accommodate an RPC's
call and reply headers.
For xprtrdma, each RPC send buffer is currently part of struct
rpcrdma_req so that xprt_rdma_free(), which is passed nothing but
the address of an RPC send buffer, can find its matching struct
rpcrdma_req and rpcrdma_rep quickly via container_of / offsetof.
That means that hardway currently has to replace a whole rpcrmda_req
when it replaces an RPC send buffer. This is often a fairly hefty
chunk of contiguous memory due to the size of the rl_segments array
and the fact that both the send and receive buffers are part of
struct rpcrdma_req.
Some obscure re-use of fields in rpcrdma_req is done so that
xprt_rdma_free() can detect replaced rpcrdma_req structs, and
restore the original.
This commit breaks apart the RPC send buffer and struct rpcrdma_req
so that increasing the size of the rl_segments array does not change
the alignment of each RPC send buffer. (Increasing rl_segments is
needed to bump up the maximum r/wsize for NFS/RDMA).
This change opens up some interesting possibilities for improving
the design of xprt_rdma_allocate().
xprt_rdma_allocate() is now the one place where RPC send buffers
are allocated or re-allocated, and they are now always left in place
by xprt_rdma_free().
A large re-allocation that includes both the rl_segments array and
the RPC send buffer is no longer needed. Send buffer re-allocation
becomes quite rare. Good send buffer alignment is guaranteed no
matter what the size of the rl_segments array is.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:04:00 +0000 (11:04 -0500)]
xprtrdma: Add struct rpcrdma_regbuf and helpers
There are several spots that allocate a buffer via kmalloc (usually
contiguously with another data structure) and then register that
buffer internally. I'd like to split the buffers out of these data
structures to allow the data structures to scale.
Start by adding functions that can kmalloc and register a buffer,
and can manage/preserve the buffer's associated ib_sge and ib_mr
fields.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:52 +0000 (11:03 -0500)]
xprtrdma: Refactor rpcrdma_buffer_create() and rpcrdma_buffer_destroy()
Move the details of how to create and destroy rpcrdma_req and
rpcrdma_rep structures into helper functions.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:44 +0000 (11:03 -0500)]
xprtrdma: Simplify synopsis of rpcrdma_buffer_create()
Clean up: There is one call site for rpcrdma_buffer_create(). All of
the arguments there are fields of an rpcrdma_xprt.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:35 +0000 (11:03 -0500)]
xprtrdma: Take struct ib_qp_attr and ib_qp_init_attr off the stack
Reduce stack footprint of the connection upcall handler function.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:27 +0000 (11:03 -0500)]
xprtrdma: Take struct ib_device_attr off the stack
Device attributes are large, and are used in more than one place.
Stash a copy in dynamically allocated memory.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:19 +0000 (11:03 -0500)]
xprtrdma: Free the pd if ib_query_qp() fails
If ib_query_qp() fails or the memory registration mode isn't
supported, don't leak the PD. An orphaned IB/core resource will
cause IB module removal to hang.
Fixes:
bd7ed1d13304 ("RPC/RDMA: check selected memory registration ...")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:11 +0000 (11:03 -0500)]
xprtrdma: Remove rpcrdma_ep::rep_func and ::rep_xprt
Clean up: The rep_func field always refers to rpcrdma_conn_func().
rep_func should have been removed by commit
b45ccfd25d50 ("xprtrdma:
Remove MEMWINDOWS registration modes").
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:03:02 +0000 (11:03 -0500)]
xprtrdma: Move credit update to RPC reply handler
Reduce work in the receive CQ handler, which can be run at hardware
interrupt level, by moving the RPC/RDMA credit update logic to the
RPC reply handler.
This has some additional benefits: More header sanity checking is
done before trusting the incoming credit value, and the receive CQ
handler no longer touches the RPC/RDMA header (the CPU stalls while
waiting for the header contents to be brought into the cache).
This further extends work begun by commit
e7ce710a8802 ("xprtrdma:
Avoid deadlock when credit window is reset").
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:54 +0000 (11:02 -0500)]
xprtrdma: Remove rl_mr field, and the mr_chunk union
Clean up: Since commit
0ac531c18323 ("xprtrdma: Remove REGISTER
memory registration mode"), the rl_mr pointer is no longer used
anywhere.
After removal, there's only a single member of the mr_chunk union,
so mr_chunk can be removed as well, in favor of a single pointer
field.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:46 +0000 (11:02 -0500)]
xprtrdma: Remove rpcrdma_ep::rep_ia
Clean up: This field is not used.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:37 +0000 (11:02 -0500)]
xprtrdma: Rename "xprt" and "rdma_connect" fields in struct rpcrdma_xprt
Clean up: Use consistent field names in struct rpcrdma_xprt.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:29 +0000 (11:02 -0500)]
xprtrdma: Clean up hdrlen
Clean up: Replace naked integers with a documenting macro.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:21 +0000 (11:02 -0500)]
xprtrdma: Display XIDs in host byte order
xprtsock.c and the backchannel code display XIDs in host byte order.
Follow suit in xprtrdma.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:13 +0000 (11:02 -0500)]
xprtrdma: Modernize htonl and ntohl
Clean up: Replace htonl and ntohl with the be32 equivalents.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Chuck Lever [Wed, 21 Jan 2015 16:02:04 +0000 (11:02 -0500)]
xprtrdma: human-readable completion status
Make it easier to grep the system log for specific error conditions.
The wc.opcode field is not included because opcode numbers are
sparse, and because wc.opcode is not necessarily valid when
completion reports an error.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Trond Myklebust [Fri, 19 Dec 2014 16:22:28 +0000 (11:22 -0500)]
NFSv4: Deal with atomic upgrades of an existing delegation
Ensure that we deal correctly with the case where the server sends us a
newer instance of the same delegation. If the stateids match, but the
sequence numbers differ, then treat the new delegation as if it were
an atomic upgrade.
Signed-off-by: Trond Myklebust <Trond.Myklebust@primarydata.com>
Trond Myklebust [Sat, 3 Jan 2015 19:47:43 +0000 (14:47 -0500)]
NFSv4.1: Replace usage of nfs_client->cl_addr in encode_create_session
Replace the current code with something that is a little closer to what
net/sunrpc/auth_unix.c uses.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 23 Jan 2015 19:50:56 +0000 (14:50 -0500)]
SUNRPC: Allow waiting on memory allocation
We should be safe now, as long as we don't do GFP_IO or higher allocations
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 23 Jan 2015 18:19:17 +0000 (13:19 -0500)]
SUNRPC: Adjust rpciod workqueue parameters
Increase the concurrency level for rpciod threads to allow for allocations
etc that happen in the RPCSEC_GSS layer. Also note that the NFSv4 byte range
locks may now need to allocate memory from inside rpciod.
Add the WQ_HIGHPRI flag to improve latency guarantees while we're at it.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 18:54:37 +0000 (13:54 -0500)]
NFSv4.1: Optimise layout return-on-close
Optimise the layout return on close code by ensuring that
1) Add a check for whether we hold a layout before taking any spinlocks
2) Only take the spin lock once
3) Use nfs_state->state to speed up open file checks
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 19:19:19 +0000 (14:19 -0500)]
NFSv4.1: Allow parallel LOCK/LOCKU calls
Note, however, that we still serialise on the open stateid if the lock
stateid is unconfirmed. Hopefully that will not prove too much of a
burden for first time locks; it should leave the ability to parallelise
OPENs unchanged, since they no longer call the serialisation primitives.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 21:03:52 +0000 (16:03 -0500)]
NFSv4: Update of VFS byte range lock must be atomic with the stateid update
Ensure that we test the lock stateid remained unchanged while we were
updating the VFS tracking of the byte range lock. Have the process
replay the lock to the server if we detect that was not the case.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 19:57:53 +0000 (14:57 -0500)]
NFSv4: Fix lock on-wire reordering issues
This patch ensures that the server cannot reorder our LOCK/LOCKU
requests if they are sent in parallel on the wire.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 23:38:15 +0000 (18:38 -0500)]
NFSv4: Always do open_to_lock_owner if the lock stateid is uninitialised
The original text in RFC3530 was terribly confusing since it conflated
lockowners and lock stateids. RFC3530bis clarifies that you must use
open_to_lock_owner when there is no lock state for that file+lockowner
combination.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 20:07:56 +0000 (15:07 -0500)]
NFSv4: Fix atomicity problems with lock stateid updates
When we update the lock stateid, we really do need to ensure that this is
done under the state->state_lock, and that we are indeed only updating
confirmed locks with a newer version of the same stateid.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 00:19:25 +0000 (19:19 -0500)]
NFSv4.1: Allow parallel OPEN/OPEN_DOWNGRADE/CLOSE
Remove the serialisation of OPEN/OPEN_DOWNGRADE and CLOSE calls for the
case of NFSv4.1 and newer.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Sat, 24 Jan 2015 00:04:44 +0000 (19:04 -0500)]
NFSv4: Check for NULL argument in nfs_*_seqid() functions
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 23 Jan 2015 23:48:00 +0000 (18:48 -0500)]
NFSv4: Convert nfs_alloc_seqid() to return an ERR_PTR() if allocation fails
When we relax the sequencing on the NFSv4.1 OPEN/CLOSE code, we will want
to use the value NULL to indicate that no sequencing is needed.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 23 Jan 2015 23:06:09 +0000 (18:06 -0500)]
NFSv4: More CLOSE/OPEN races
If an OPEN RPC call races with a CLOSE or OPEN_DOWNGRADE so that it
updates the nfs_state structure before the CLOSE/OPEN_DOWNGRADE has
a chance to do so, then we know that the state->flags need to be
recalculated from scratch.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Fri, 23 Jan 2015 20:32:46 +0000 (15:32 -0500)]
NFSv4: Fix an atomicity problem in CLOSE
If we are to remove the serialisation of OPEN/CLOSE, then we need to
ensure that the stateid sent as part of a CLOSE operation does not
change after we test the state in nfs4_close_prepare.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Anna Schumaker [Tue, 9 Dec 2014 21:19:16 +0000 (16:19 -0500)]
NFS: Fix use of nfs_attr_use_mounted_on_fileid()
This function call was being optimized out during nfs_fhget(), leading
to situations where we have a valid fileid but still want to use the
mounted_on_fileid. For example, imagine we have our server configured
like this:
server % df
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 9.1G 6.5G 1.9G 78% /
/dev/vdb1 487M 2.3M 456M 1% /exports
/dev/vdc1 487M 2.3M 456M 1% /exports/vol1
/dev/vdd1 487M 2.3M 456M 1% /exports/vol2
If our client mounts /exports and tries to do a "chown -R" across the
entire mountpoint, we will get a nasty message warning us about a circular
directory structure. Running chown with strace tells me that each directory
has the same device and inode number:
newfstatat(AT_FDCWD, "/nfs/", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0
newfstatat(4, "vol1", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0
newfstatat(4, "vol2", {st_dev=makedev(0, 38), st_ino=2, ...}) = 0
With this patch the mounted_on_fileid values are used for st_ino, so the
directory loop warning isn't reported.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Trond Myklebust [Wed, 21 Jan 2015 19:37:44 +0000 (14:37 -0500)]
NFSv4.1: Fix an Oops in nfs41_walk_client_list
If we start state recovery on a client that failed to initialise correctly,
then we are very likely to Oops.
Reported-by: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de>
Link: http://lkml.kernel.org/r/130621862.279655.1421851650684.JavaMail.zimbra@desy.de
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Peng Tao [Mon, 19 Jan 2015 23:44:29 +0000 (07:44 +0800)]
nfs: fix dio deadlock when O_DIRECT flag is flipped
We only support swap file calling nfs_direct_IO. However, application
might be able to get to nfs_direct_IO if it toggles O_DIRECT flag
during IO and it can deadlock because we grab inode->i_mutex in
nfs_file_direct_write(). So return 0 for such case. Then the generic
layer will fall back to buffer IO.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>