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NFSv4.1: file layout must consider pg_bsize for coalescing

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Otherwise we end up overflowing the rpc buffer size on the receive end.

Signed-off-by: Benny Halevy <benny@tonian.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Benny Halevy 2011-06-19 18:33:46 -04:00 committed by Trond Myklebust
parent df18d127f4
commit 19345cb299
3 changed files with 9 additions and 3 deletions
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6
fs/nfs/nfs4filelayout.c
View file

@ -30,6 +30,7 @@
*/
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include "internal.h"
#include "nfs4filelayout.h"
@ -666,8 +667,9 @@ filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
u64 p_stripe, r_stripe;
u32 stripe_unit;
if (!pnfs_generic_pg_test(pgio, prev, req))
return 0;
if (!pnfs_generic_pg_test(pgio, prev, req) ||
!nfs_generic_pg_test(pgio, prev, req))
return false;
if (!pgio->pg_lseg)
return 1;

3
fs/nfs/pagelist.c
View file

@ -204,7 +204,7 @@ nfs_wait_on_request(struct nfs_page *req)
TASK_UNINTERRUPTIBLE);
}
static bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req)
bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req)
{
/*
* FIXME: ideally we should be able to coalesce all requests
@ -218,6 +218,7 @@ static bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, struct nfs_p
return desc->pg_count + req->wb_bytes <= desc->pg_bsize;
}
EXPORT_SYMBOL_GPL(nfs_generic_pg_test);
/**
* nfs_pageio_init - initialise a page io descriptor

3
include/linux/nfs_page.h
View file

@ -92,6 +92,9 @@ extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
struct nfs_page *);
extern void nfs_pageio_complete(struct nfs_pageio_descriptor *desc);
extern void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *, pgoff_t);
extern bool nfs_generic_pg_test(struct nfs_pageio_descriptor *desc,
struct nfs_page *prev,
struct nfs_page *req);
extern int nfs_wait_on_request(struct nfs_page *);
extern void nfs_unlock_request(struct nfs_page *req);
extern int nfs_set_page_tag_locked(struct nfs_page *req);