talos-obmc-linux/include/linux/nfs_xdr.h, branch v3.16

pnfs: support multiple verfs per direct req

2014-05-29T15:11:48+00:00

Support direct requests that span multiple pnfs data servers by comparing nfs_pgio_header->verf to a cached verf in pnfs_commit_bucket. Continue to use dreq->verf if the MDS is used / non-pNFS. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

nfs: remove data list from pgio header

2014-05-29T15:11:48+00:00

Since the ability to split pages into subpage requests has been added, nfs_pgio_header->rpc_list only ever has one pgio data. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

NFS: Create a common pgio_rpc_prepare function

2014-05-28T22:40:28+00:00

The read and write paths do exactly the same thing for the rpc_prepare rpc_op. This patch combines them together into a single function. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust

NFS: Create a common rw_header_alloc and rw_header_free function

2014-05-28T22:40:04+00:00

I create a new struct nfs_rw_ops to decide the differences between reads and writes. This struct will be set when initializing a new nfs_pgio_descriptor, and then passed on to the nfs_rw_header when a new header is allocated. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust

NFS: Move the write verifier into the nfs_pgio_header

2014-05-28T22:39:38+00:00

The header had a pointer to the verifier that was set from the old write data struct. We don't need to keep the pointer around now that we have shared structures. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust

NFS: Create a common read and write header struct

2014-05-28T22:12:55+00:00

The only difference is the write verifier field, but we can keep that for a little bit longer. Signed-off-by: Anna Schumaker 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

NFS: Create a common results structure for reads and writes

2014-05-28T22:12:43+00:00

Reads and writes have very similar results. This patch combines the two structs together with comments to show where the differing fields are used. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust

NFS: Create a common argument structure for reads and writes

2014-05-28T22:12:02+00:00

Reads and writes have very similar arguments. This patch combines them together and documents the few fields used only by write. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust

nfs: remove ->read_pageio_init from rpc ops

2014-05-28T21:50:08+00:00

The read_pageio_init method is just a very convoluted way to grab the right nfs_pageio_ops vector. The vector to chose is not a choice of protocol version, but just a pNFS vs MDS I/O choice that can simply be done inside nfs_pageio_init_read based on the presence of a layout driver, and a new force_mds flag to the special case of falling back to MDS I/O on a pNFS-capable volume. Signed-off-by: Christoph Hellwig Tested-by: Anna Schumaker Signed-off-by: Trond Myklebust