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NFS41: send real write size in layoutget

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For buffer write, block layout client scan inode mapping to find
next hole and use offset-to-hole as layoutget length. Object
layout client uses offset-to-isize as layoutget length.

For direct write, both block layout and object layout use dreq->bytes_left.

Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Peng Tao
2012-09-25 14:55:57 +08:00
committed by Trond Myklebust
parent 35754bc00e
commit 6296556f0b
6 changed files with 57 additions and 7 deletions
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9
fs/nfs/objlayout/objio_osd.c
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@@ -41,6 +41,7 @@
#include <scsi/osd_ore.h>
#include "objlayout.h"
#include "../internal.h"
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
@@ -606,8 +607,14 @@ static bool aligned_on_raid_stripe(u64 offset, struct ore_layout *layout,
void objio_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
unsigned long stripe_end = 0;
u64 wb_size;
pnfs_generic_pg_init_write(pgio, req);
if (pgio->pg_dreq == NULL)
wb_size = i_size_read(pgio->pg_inode) - req_offset(req);
else
wb_size = nfs_dreq_bytes_left(pgio->pg_dreq);
pnfs_generic_pg_init_write(pgio, req, wb_size);
if (unlikely(pgio->pg_lseg == NULL))
return; /* Not pNFS */