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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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6
fs/nfs/pnfs.c
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@@ -1240,7 +1240,8 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r
EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read);
void
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size)
{
BUG_ON(pgio->pg_lseg != NULL);
@@ -1248,10 +1249,11 @@ pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *
nfs_pageio_reset_write_mds(pgio);
return;
}
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
req->wb_bytes,
wb_size,
IOMODE_RW,
GFP_NOFS);
/* If no lseg, fall back to write through mds */