linux-toradex.git/fs/nfs/objlayout, branch tegra

pnfs-obj: Fix the comp_index != 0 case

2011-08-04T15:54:48+00:00

There were bugs in the case of partial layout where olo_comp_index
is not zero. This used to work and was tested but one of the later
cleanup SQUASHMEs broke it and was not tested since.

Also add a dprint that specify those received layout parameters.
Everything else was already printed.

[Needed in v3.0]
CC: Stable Tree 
Signed-off-by: Boaz Harrosh 
Signed-off-by: Trond Myklebust

pnfs-obj: Bug when we are running out of bio

2011-08-04T15:54:38+00:00

When we have a situation that the number of pages we want
to encode is bigger then the size of the bio. (Which can
currently happen only when all IO is going to a single device
.e.g group_width==1) then the IO is submitted short and we
report back only the amount of bytes we actually wrote/read
and all is fine. BUT ...

There was a bug that the current length counter was advanced
before the fail to add the extra page, and we come to a situation
that the CDB length was one-page longer then the actual bio size,
which is of course rejected by the osd-target.

While here also fix the bio size calculation, in the case
that we received more then one group of devices.

CC: Stable Tree 
Signed-off-by: Boaz Harrosh 
Signed-off-by: Trond Myklebust

pnfs: simplify pnfs files module autoloading

2011-07-15T23:21:58+00:00

Embed the necessary alias into the module rather than waiting for
someone to add it to /etc/modprobe.conf

Signed-off-by: J. Bruce Fields 
Signed-off-by: Trond Myklebust

NFS: Move the pnfs write code into pnfs.c

2011-07-15T13:12:22+00:00

...and ensure that we recoalese to take into account differences in
differences in block sizes when falling back to write through the MDS.

Signed-off-by: Trond Myklebust

NFS: Move the pnfs read code into pnfs.c

2011-07-15T13:12:21+00:00

...and ensure that we recoalese to take into account differences in
block sizes when falling back to read through the MDS.

Signed-off-by: Trond Myklebust

NFSv4.1: Fall back to ordinary i/o through the mds if we have no layout segment

2011-07-12T17:40:28+00:00

Signed-off-by: Trond Myklebust

NFSv4.1: Add an initialisation callback for pNFS

2011-07-12T17:40:28+00:00

Ensure that we always get a layout before setting up the i/o request.

Signed-off-by: Trond Myklebust

NFS: Cleanup of the nfs_pageio code in preparation for a pnfs bugfix

2011-07-12T17:40:28+00:00

We need to ensure that the layouts are set up before we can decide to
coalesce requests. To do so, we want to further split up the struct
nfs_pageio_descriptor operations into an initialisation callback, a
coalescing test callback, and a 'do i/o' callback.

This patch cleans up the existing callback methods before adding the
'initialisation' callback.

Signed-off-by: Trond Myklebust

NFSv4.1: Fix some issues with pnfs_generic_pg_test

2011-06-21T15:54:05+00:00

1. If the intention is to coalesce requests 'prev' and 'req' then we
   have to ensure at least that we have a layout starting at
   req_offset(prev).

2. If we're only requesting a minimal layout of length desc->pg_count,
   we need to test the length actually returned by the server before
   we allow the coalescing to occur.

3. We need to deal correctly with (pgio->lseg == NULL)

4. Fixup the test guarding the pnfs_update_layout.

Signed-off-by: Trond Myklebust

pnfs-obj: No longer needed to take an extra ref at add_device

2011-06-19T18:49:51+00:00

Andy's last device_cache patches, already take an extra
reference on the newly inserted device_id. So we can remove it
from obj-io.

Without this patch the device_ids are leaked.

Andy's patches are not in Linus tree yet. So I'm not sure if they are
scheduled for this Kernel or the next. This patch should be added as
part of these.

CC: Andy Adamson 
Signed-off-by: Boaz Harrosh 
Signed-off-by: Trond Myklebust