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authorBenny Halevy <benny@tonian.com>2011-06-19 18:33:46 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-06-20 16:12:26 -0400
commit19345cb299e8234006c5125151ab723e851a1d24 (patch)
tree43bde1db751eb50afbdabfbd26814431c8be573c
parentdf18d127f4fed7a0284bcfa8d2843800cdb63b72 (diff)
downloadop-kernel-dev-19345cb299e8234006c5125151ab723e851a1d24.zip
op-kernel-dev-19345cb299e8234006c5125151ab723e851a1d24.tar.gz
NFSv4.1: file layout must consider pg_bsize for coalescing
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>
-rw-r--r--fs/nfs/nfs4filelayout.c6
-rw-r--r--fs/nfs/pagelist.c3
-rw-r--r--include/linux/nfs_page.h3
3 files changed, 9 insertions, 3 deletions
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 5d6f369..0bafcc9 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -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;
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 7913961..0098557 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -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
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 3a34e80..25311b3 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -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);
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