Remove alignment checks that would revert to MDS and change pg_test
to return the max ammount left in the segment (or other pg_test call)
up to size of passed request, or 0 if no space is left.
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxxxxxxx>
---
fs/nfs/pnfs.c | 25 ++++++++++---------------
1 file changed, 10 insertions(+), 15 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 6ef108b..ce46a41 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1388,11 +1388,6 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r
WARN_ON_ONCE(pgio->pg_lseg != NULL);
- if (req->wb_offset != req->wb_pgbase) {
- nfs_pageio_reset_read_mds(pgio);
- return;
- }
-
if (pgio->pg_dreq == NULL)
rd_size = i_size_read(pgio->pg_inode) - req_offset(req);
else
@@ -1417,11 +1412,6 @@ pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
{
WARN_ON_ONCE(pgio->pg_lseg != NULL);
- if (req->wb_offset != req->wb_pgbase) {
- nfs_pageio_reset_write_mds(pgio);
- return;
- }
-
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
@@ -1443,9 +1433,9 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
struct nfs_page *req)
{
unsigned int size;
+ u64 end;
size = nfs_generic_pg_test(pgio, prev, req);
-
if (!size)
return 0;
@@ -1463,11 +1453,16 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
* first byte that lies outside the pnfs_layout_range. FIXME?
*
*/
- if (req_offset(req) >= end_offset(pgio->pg_lseg->pls_range.offset,
- pgio->pg_lseg->pls_range.length))
- return 0;
+ if (pgio->pg_lseg) {
+ end = end_offset(pgio->pg_lseg->pls_range.offset,
+ pgio->pg_lseg->pls_range.length);
+ WARN_ON_ONCE(req_offset(req) > end);
+ if (req_offset(req) >= end)
+ return 0;
+ size = min((unsigned int)(end - req_offset(req)), size);
+ }
- return min(size, req->wb_bytes);
+ return size;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
--
1.8.5.2 (Apple Git-48)
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