Hi Boaz,
Have you tested these patches in linux-next? If so, I can pull them in
from open-osd.org and send them with the next merge. If not, I think
patches (as soon as possible!) would be better. I'll commit them to
nfs-for-next, and we can try to get them in...
Cheers
Trond
On Fri, 2011-10-28 at 12:13 -0700, Boaz Harrosh wrote:
> Trond hi.
>
> Now that both your NFS bits and ORE bits are in Linus tree. We can send in
> the pnfs-objects layout driver patches.
>
> How do you want to do this. Should I post them by email, or do you want
> to pull them from git.open-osd.org?
>
> The patches are available in the git repository at:
>
> git://git.open-osd.org/linux-open-osd.git for-linus
>
> Based on commit f362f98e7c445643d27c610bb7a86b79727b592e:
> Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue (2011-10-28 10:49:34 -0700)
>
> Boaz Harrosh (8):
> pnfs-obj: Remove redundant EOF from objlayout_io_state
> pnfs-obj: Return PNFS_NOT_ATTEMPTED in case of read/write_pagelist
> pnfs-obj: Get rid of objlayout_{alloc,free}_io_state
> pnfs-obj: Rename objlayout_io_state => objlayout_io_res
> pnfs-obj: move to ore 01: ore_layout & ore_components
> pnfs-obj: move to ore 02: move to ORE
> pnfs-obj: move to ore 03: Remove old raid engine
> pnfs-obj: Support for RAID5 read-4-write interface.
>
> fs/exofs/Kconfig | 2 +-
> fs/nfs/objlayout/objio_osd.c | 872 ++++++++++--------------------------------
> fs/nfs/objlayout/objlayout.c | 209 ++++-------
> fs/nfs/objlayout/objlayout.h | 48 ++--
> 4 files changed, 302 insertions(+), 829 deletions(-)
>
> ---
> List of commits:
>
> commit dde406e58cd91b10233c40fa5ea86c1261a4d043
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Wed Oct 12 15:42:07 2011 +0200
>
> pnfs-obj: Support for RAID5 read-4-write interface.
>
> The ore need suplied a r4w_get_page/r4w_put_page API
> from Filesystem so it can get cache pages to read-into when
> writing parial stripes.
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 38 ++++++++++++++++++++++++++++++++++++++
> 1 files changed, 38 insertions(+), 0 deletions(-)
>
> commit 48a5fbeedb4b9a80930e987a8f7bea4f784ae4e0
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Mon Oct 3 16:55:29 2011 +0200
>
> pnfs-obj: move to ore 03: Remove old raid engine
>
> Finally remove all the old raid engine, which is by now
> dead code.
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 504 ------------------------------------------
> 1 files changed, 0 insertions(+), 504 deletions(-)
>
> commit b0f3d5f82fd8acefc0f2659cf1bb931942500db5
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Mon Oct 3 20:26:05 2011 +0200
>
> pnfs-obj: move to ore 02: move to ORE
>
> In this patch we are actually moving to the ORE.
> (Object Raid Engine).
>
> objio_state holds a pointer to an ore_io_state. Once
> we have an ore_io_state at hand we can call the ore
> for reading/writing. We register on the done path
> to kick off the nfs io_done mechanism.
>
> Again for Ease of reviewing the old code is "#if 0"
> but is not removed so the diff command works better.
> The old code will be removed in the next patch.
>
> fs/exofs/Kconfig::ORE is modified to also be auto-included
> if PNFS_OBJLAYOUT is set. Since we now depend on ORE.
> (See comments in fs/exofs/Kconfig)
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/exofs/Kconfig | 2 +-
> fs/nfs/objlayout/objio_osd.c | 133 +++++++++++++++++++-----------------------
> 2 files changed, 60 insertions(+), 75 deletions(-)
>
> commit 79ca7af7ec31cbf83a86e61c80ca0e24215244bf
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Mon Oct 3 15:57:55 2011 +0200
>
> pnfs-obj: move to ore 01: ore_layout & ore_components
>
> For Ease of reviewing I split the move to ore into 3 parts
> move to ore 01: ore_layout & ore_components
> move to ore 02: move to ORE
> move to ore 03: Remove old raid engine
>
> This patch modifies the objio_lseg, layout-segment level
> and devices and components arrays to use the ORE types.
>
> Though it will be removed soon, also the raid engine
> is modified to actually compile, possibly run, with
> the new types. So it is the same old raid engine but
> with some new ORE types.
>
> For Ease of reviewing, some of the old code is
> "#if 0" but is not removed so the diff command works
> better. The old code will be removed in the 3rd patch.
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 272 ++++++++++++++++++++----------------------
> 1 files changed, 128 insertions(+), 144 deletions(-)
>
> commit 67d896c6805004e1ca32c07d9c0a4df504eb7658
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Mon Oct 3 17:21:47 2011 +0200
>
> pnfs-obj: Rename objlayout_io_state => objlayout_io_res
>
> * All instances of objlayout_io_state => objlayout_io_res
> * All instances of state => oir;
> * All instances of ol_state => oir;
>
> Big but nothing to it
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 17 +++++------
> fs/nfs/objlayout/objlayout.c | 63 ++++++++++++++++++++---------------------
> fs/nfs/objlayout/objlayout.h | 15 ++++++----
> 3 files changed, 48 insertions(+), 47 deletions(-)
>
> commit daaaebf9e448ad8a306333537dfabf1e878bd47d
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Tue Aug 16 17:34:59 2011 -0700
>
> pnfs-obj: Get rid of objlayout_{alloc,free}_io_state
>
> This is part of moving objio_osd to use the ORE.
>
> objlayout_io_state had two functions:
> 1. It was used in the error reporting mechanism at layout_return.
> This function is kept intact.
> (Later patch will rename objlayout_io_state => objlayout_io_res)
> 2. Carrier of rw io members into the objio_read/write_paglist API.
> This is removed in this patch.
>
> The {r,w}data received from NFS are passed directly to the
> objio_{read,write}_paglist API. The io_engine is now allocating
> it's own IO state as part of the read/write. The minimal
> functionality that was part of the generic allocation is passed
> to the io_engine.
>
> So part of this patch is rename of:
> ios->ol_state.foo => ios->foo
>
> At objlayout_{read,write}_done an objlayout_io_state is passed that
> denotes the result of the IO. (Hence the later name change).
> If the IO is successful objlayout calls an objio_free_result() API
> immediately (Which for objio_osd causes the release of the io_state).
> If the IO ended in an error it is hanged onto until reported in
> layout_return and is released later through the objio_free_result()
> API. (All this is not new just renamed and cleaned)
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 94 ++++++++++++++++++++++----------
> fs/nfs/objlayout/objlayout.c | 124 +++++++++++-------------------------------
> fs/nfs/objlayout/objlayout.h | 36 ++++++-------
> 3 files changed, 112 insertions(+), 142 deletions(-)
>
> commit 1f1fe6e7fee0ee5e6ffa9807a0be763f4b6b01d8
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Sun Oct 2 17:23:29 2011 +0200
>
> pnfs-obj: Return PNFS_NOT_ATTEMPTED in case of read/write_pagelist
>
> objlayout driver was always returning PNFS_ATTEMPTED from it's
> read/write_pagelist operations. Even on error. Fix that.
>
> Start by establishing an error return API from io-engine, by
> not returning ssize_t (length-or-error) but returning "int"
> 0=OK, 0>Error. And clean up all return types in io-engine.
>
> Then if io-engine returned error return PNFS_NOT_ATTEMPTED
> to generic layer. (With a dprint)
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objio_osd.c | 32 ++++++++++++++++----------------
> fs/nfs/objlayout/objlayout.c | 36 +++++++++++++++++++-----------------
> fs/nfs/objlayout/objlayout.h | 4 ++--
> 3 files changed, 37 insertions(+), 35 deletions(-)
>
> commit 64a6725b53fad1f199e9cafa5634573b392e9b01
> Author: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
> Date: Sun Oct 2 16:06:09 2011 +0200
>
> pnfs-obj: Remove redundant EOF from objlayout_io_state
>
> The EOF calculation was done on .read_pagelist(), cached
> in objlayout_io_state->eof, and set in objlayout_read_done()
> into nfs_read_data->res.eof.
>
> So set it directly into nfs_read_data->res.eof and avoid
> the extra member.
>
> This is a slight behaviour change because before eof was
> *not* set on an error update at objlayout_read_done(). But
> is that a problem? Is Generic layer so sensitive that it
> will miss the error IO if eof was set? From my testing
> I did not see such a problem.
>
> Benny please review.
>
> Which brings me to a more abstract problem. Why does the
> LAYOUT driver needs to do this eof calculation? .i.e we
> are inspecting generic i_size_read() and if spanned by
> offset + count which is received from generic layer we set
> eof. It looks like all this can/should be done in generic
> layer and not at LD. Where does NFS and files-LD do it?
> It looks like it can be promoted.
>
> Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
>
> fs/nfs/objlayout/objlayout.c | 16 +++++++---------
> fs/nfs/objlayout/objlayout.h | 1 -
> 2 files changed, 7 insertions(+), 10 deletions(-)
>
> Thanks very much
> Boaz
--
Trond Myklebust
Linux NFS client maintainer
NetApp
Trond.Myklebust@xxxxxxxxxx
www.netapp.com
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