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NFS: Create a common rpcsetup function for reads and writes

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Write adds a little bit of code dealing with flush flags, but since
"how" will always be 0 when reading we can share the code.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Anna Schumaker
2014-05-06 09:12:34 -04:00
committed by Trond Myklebust
parent 6f92fa4581
commit ce59515c14
4 changed files with 53 additions and 66 deletions
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44
fs/nfs/pagelist.c
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@@ -388,6 +388,50 @@ void nfs_pgio_data_release(struct nfs_pgio_data *data)
}
EXPORT_SYMBOL_GPL(nfs_pgio_data_release);
/**
* nfs_pgio_rpcsetup - Set up arguments for a pageio call
* @data: The pageio data
* @count: Number of bytes to read
* @offset: Initial offset
* @how: How to commit data (writes only)
* @cinfo: Commit information for the call (writes only)
*/
void nfs_pgio_rpcsetup(struct nfs_pgio_data *data,
unsigned int count, unsigned int offset,
int how, struct nfs_commit_info *cinfo)
{
struct nfs_page *req = data->header->req;
/* Set up the RPC argument and reply structs
* NB: take care not to mess about with data->commit et al. */
data->args.fh = NFS_FH(data->header->inode);
data->args.offset = req_offset(req) + offset;
/* pnfs_set_layoutcommit needs this */
data->mds_offset = data->args.offset;
data->args.pgbase = req->wb_pgbase + offset;
data->args.pages = data->pages.pagevec;
data->args.count = count;
data->args.context = get_nfs_open_context(req->wb_context);
data->args.lock_context = req->wb_lock_context;
data->args.stable = NFS_UNSTABLE;
switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) {
case 0:
break;
case FLUSH_COND_STABLE:
if (nfs_reqs_to_commit(cinfo))
break;
default:
data->args.stable = NFS_FILE_SYNC;
}
data->res.fattr = &data->fattr;
data->res.count = count;
data->res.eof = 0;
data->res.verf = &data->verf;
nfs_fattr_init(&data->fattr);
}
/**
* nfs_pgio_prepare - Prepare pageio data to go over the wire
* @task: The current task