NFSv4.1: shift pnfs_update_layout locations

Move the pnfs_update_layout call location to nfs_pageio_do_add_request().
Grab the lseg sent in the doio function to nfs_read_rpcsetup and attach
it to each nfs_read_data so it can be sent to the layout driver.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 4eaf27a1282d..ba88ff4f8186 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -59,7 +59,7 @@ struct nfs_pageio_descriptor {
         unsigned int            pg_base;
 
         struct inode            *pg_inode;
-        int                     (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int);
+        int                     (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
         int                     pg_ioflags;
         int                     pg_error;
         struct pnfs_layout_segment *pg_lseg;
@@ -81,7 +81,7 @@ extern	int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *dst,
                           pgoff_t idx_start, unsigned int npages, int tag);
 extern  void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
                              struct inode *inode,
-                             int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int),
+                             int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *),
                              size_t bsize,
                              int how);
 extern  int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index d159fe733381..560923e28723 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1017,6 +1017,7 @@ struct nfs_read_data {
         struct nfs_readargs args;
         struct nfs_readres  res;
         unsigned long           timestamp;      /* For lease renewal */
+        struct pnfs_layout_segment *lseg;
         struct page             *page_array[NFS_PAGEVEC_SIZE];
 };