linux-toradex.git/include/linux/nfs_page.h, branch v3.7

NFS41: add pg_layout_private to nfs_pageio_descriptor

2012-08-02T21:41:18+00:00

To allow layout driver to pass private information around
pg_init/pg_doio.

Signed-off-by: Peng Tao 
Signed-off-by: Boaz Harrosh 
Signed-off-by: Trond Myklebust

NFS: Cleanup - only store the write verifier in struct nfs_page

2012-06-28T21:20:50+00:00

The 'committed' field is not needed once we have put the struct nfs_page
on the right list.

Also correct the type of the verifier: it is not an array of __be32, but
simply an 8 byte long opaque array.

Signed-off-by: Trond Myklebust

NFS: Clean up - Rename nfs_unlock_request and nfs_unlock_request_dont_release

2012-05-09T19:17:43+00:00

Function rename to ensure that the functionality of nfs_unlock_request()
mirrors that of nfs_lock_request(). Then let nfs_unlock_and_release_request()
do the work of what used to be called nfs_unlock_request()...

Signed-off-by: Trond Myklebust 
Cc: Fred Isaman

NFS: Clean up - simplify nfs_lock_request()

2012-05-09T19:17:34+00:00

We only have two places where we need to grab a reference when trying
to lock the nfs_page. We're better off making that explicit.

Signed-off-by: Trond Myklebust 
Cc: Fred Isaman

NFS: Prevent a deadlock in the new writeback code

2012-05-09T19:16:07+00:00

We have to unlock the nfs_page before we call nfs_end_page_writeback
to avoid races with functions that expect the page to be unlocked
when PG_locked and PG_writeback are not set.
The problem is that nfs_unlock_request also releases the nfs_page,
causing a deadlock if the release of the nfs_open_context
triggers an iput() while the PG_writeback flag is still set...

The solution is to separate the unlocking and release of the nfs_page,
so that we can do the former before nfs_end_page_writeback and the
latter after.

Signed-off-by: Trond Myklebust 
Cc: Fred Isaman

NFS: rewrite directio read to use async coalesce code

2012-04-27T18:10:38+00:00

This also has the advantage that it allows directio to use pnfs.

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: remove unused wb_complete field from struct nfs_page

2012-04-27T18:10:38+00:00

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: create completion structure to pass into page_init functions

2012-04-27T18:10:38+00:00

Factors out the code that will need to change when directio
starts using these code paths.  This will allow directio to use
the generic pagein and flush routines

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: merge _full and _partial read rpc_ops

2012-04-27T18:10:37+00:00

Decouple nfs_pgio_header and nfs_read_data, and have (possibly
multiple) nfs_read_datas each take a refcount on nfs_pgio_header.

For the moment keeps nfs_read_header as a way to preallocate a single
nfs_read_data with the nfs_pgio_header.  The code doesn't need this,
and would be prettier without, but given the amount of churn I am
already introducing I didn't want to play with tuning new mempools.

This also fixes bug in pnfs_ld_handle_read_error.  In the case of
desc->pg_bsize < PAGE_CACHE_SIZE, the pages list was empty, causing
replay attempt to do nothing.

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit code

2012-03-17T15:09:33+00:00

Move more pnfs-isms out of the generic commit code.

Bugfixes:

- filelayout_scan_commit_lists doesn't need to get/put the lseg.
  In fact since it is run under the inode->i_lock, the lseg_put()
  can deadlock.

- Ensure that we distinguish between what needs to be done for
  commit-to-data server and what needs to be done for commit-to-MDS
  using the new flag PG_COMMIT_TO_DS. Otherwise we may end up calling
  put_lseg() on a bucket for a struct nfs_page that got written
  through the MDS.

- Fix a case where we were using list_del() on an nfs_page->wb_list
  instead of list_del_init().

- filelayout_initiate_commit needs to call filelayout_commit_release
  on error instead of the mds_ops->rpc_release(). Otherwise it won't
  clear the commit lock.

Cleanups:

- Let the files layout manage the commit lists for the pNFS case.
  Don't expose stuff like pnfs_choose_commit_list, and the fact
  that the commit buckets hold references to the layout segment
  in common code.

- Cast out the put_lseg() calls for the struct nfs_read/write_data->lseg
  into the pNFS layer from whence they came.

- Let the pNFS layer manage the NFS_INO_PNFS_COMMIT bit.

Signed-off-by: Trond Myklebust 
Cc: Fred Isaman