linux.git/fs/nfs/objlayout/objlayout.h, branch v4.0

Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

2014-10-21T19:53:45+00:00

Pull email address change from Boaz Harrosh.

* 'for-linus' of git://git.open-osd.org/linux-open-osd:
  Boaz Harrosh - fix email in Documentation
  Boaz Harrosh - Fix broken email address
  MAINTAINERS: Change Boaz Harrosh's email

Boaz Harrosh - Fix broken email address

2014-10-19T17:22:32+00:00

I no longer have access to the Panasas email.
So change to an email that can always reach me.

Signed-off-by: Boaz Harrosh

pnfs: factor GETDEVICEINFO implementations

2014-09-10T19:47:03+00:00

Add support to the common pNFS core to issue GETDEVICEINFO calls on
a device ID cache miss.  The code is taken from the well debugged
file layout implementation and calls out to the layoutdriver through
a new alloc_deviceid_node method.  The calling conventions for
nfs4_find_get_deviceid are changed so that all information needed to
send a GETDEVICEINFO request is passed to the common code.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

nfs: merge nfs_pgio_data into _header

2014-06-24T22:47:00+00:00

struct nfs_pgio_data only exists as a member of nfs_pgio_header, but is
passed around everywhere, because there used to be multiple _data structs
per _header. Many of these functions then use the _data to find a pointer
to the _header.  This patch cleans this up by merging the nfs_pgio_data
structure into nfs_pgio_header and passing nfs_pgio_header around instead.

Reviewed-by: Christoph Hellwig 
Signed-off-by: Weston Andros Adamson 
Signed-off-by: Trond Myklebust

NFS: Create a common read and write data struct

2014-05-28T22:12:47+00:00

At this point, the only difference between nfs_read_data and
nfs_write_data is the write verifier.

Signed-off-by: Anna Schumaker 
Signed-off-by: Trond Myklebust

treewide: Fix typo in printks

2013-04-12T13:21:36+00:00

Correct spelling typos in printk and comments.

Signed-off-by: Masanari Iida 
Acked-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

pnfs-obj: autologin: Add support for protocol autologin

2012-03-21T13:31:47+00:00

The pnfs-objects protocol mandates that we autologin into devices not
present in the system, according to information specified in the
get_device_info returned from the server.

The Protocol specifies two login hints.
1. An IP address:port combination
2. A string URI which is constructed as a URL with a protocol prefix
   followed by :// and a string as address. For each  protocol prefix
   the string-address format might be different.

We only support the second option. The first option is just redundant
to the second one.
NOTE: The Kernel part of autologin does not parse the URI string. It
just channels it to a user-mode script. So any new login protocols should
only update the user-mode script which is a part of the nfs-utils package,
but the Kernel need not change.

We implement the autologin by using the call_usermodehelper() API.
(Thanks to Steve Dickson  for pointing it out)
So there is no running daemon needed, and/or special setup.

We Add the osd_login_prog Kernel module parameters which defaults to:
	/sbin/osd_login

Kernel try's to upcall the program specified in osd_login_prog. If the file is
not found or the execution fails Kernel will disable any farther upcalls, by
zeroing out  osd_login_prog, Until Admin re-enables it by setting the
osd_login_prog parameter to a proper program.

Also add text about the osd_login program command line API to:
	Documentation/filesystems/nfs/pnfs.txt
and documentation of the new  osd_login_prog  module parameter to:
	Documentation/kernel-parameters.txt

TODO: Add timeout option in the case osd_login program gets
              stuck

Signed-off-by: Sachin Bhamare 
Signed-off-by: Boaz Harrosh 
Signed-off-by: Trond Myklebust

pnfs-obj: Rename objlayout_io_state => objlayout_io_res

2011-11-03T03:56:06+00:00

* 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 
Signed-off-by: Trond Myklebust

pnfs-obj: Get rid of objlayout_{alloc,free}_io_state

2011-11-03T03:56:05+00:00

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 
Signed-off-by: Trond Myklebust

pnfs-obj: Return PNFS_NOT_ATTEMPTED in case of read/write_pagelist

2011-11-03T03:56:03+00:00

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 
Signed-off-by: Trond Myklebust