NFSv4.1: unify pnfs_pageio_init functions
Use common code for pnfs_pageio_init_{read,write} and use
a common generic pg_test function.
Note that this function always assumes the the layout driver's
pg_test method is implemented.
[Fix BUG]
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 00b1282..568ab0e 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1043,18 +1043,30 @@
goto out;
}
-static int pnfs_read_pg_test(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *prev,
- struct nfs_page *req)
+int
+pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
+ struct nfs_page *req)
{
+ enum pnfs_iomode access_type;
+ gfp_t gfp_flags;
+
+ /* We assume that pg_ioflags == 0 iff we're reading a page */
+ if (pgio->pg_ioflags == 0) {
+ access_type = IOMODE_READ;
+ gfp_flags = GFP_KERNEL;
+ } else {
+ access_type = IOMODE_RW;
+ gfp_flags = GFP_NOFS;
+ }
+
if (pgio->pg_count == prev->wb_bytes) {
/* This is first coelesce call for a series of nfs_pages */
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
prev->wb_context,
req_offset(req),
pgio->pg_count,
- IOMODE_READ,
- GFP_KERNEL);
+ access_type,
+ gfp_flags);
} else if (pgio->pg_lseg &&
req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
pgio->pg_lseg->pls_range.length))
@@ -1062,43 +1074,6 @@
return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
}
-void
-pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode)
-{
- struct pnfs_layoutdriver_type *ld;
-
- ld = NFS_SERVER(inode)->pnfs_curr_ld;
- pgio->pg_test = (ld && ld->pg_test) ? pnfs_read_pg_test : NULL;
-}
-
-static int pnfs_write_pg_test(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *prev,
- struct nfs_page *req)
-{
- if (pgio->pg_count == prev->wb_bytes) {
- /* This is first coelesce call for a series of nfs_pages */
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- prev->wb_context,
- req_offset(req),
- pgio->pg_count,
- IOMODE_RW,
- GFP_NOFS);
- } else if (pgio->pg_lseg &&
- req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
- pgio->pg_lseg->pls_range.length))
- return 0;
- return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
-}
-
-void
-pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode)
-{
- struct pnfs_layoutdriver_type *ld;
-
- ld = NFS_SERVER(inode)->pnfs_curr_ld;
- pgio->pg_test = (ld && ld->pg_test) ? pnfs_write_pg_test : NULL;
-}
-
/*
* Called by non rpc-based layout drivers
*/