From: Peng Tao <bergwolf@xxxxxxxxx>
To allow layout driver to pass private information around
pg_init/pg_doio.
Signed-off-by: Peng Tao <tao.peng@xxxxxxx>
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
---
fs/nfs/pagelist.c | 2 ++
include/linux/nfs_page.h | 1 +
include/linux/nfs_xdr.h | 1 +
3 files changed, 4 insertions(+)
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index aed913c..342ca5e 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -49,6 +49,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
hdr->io_start = req_offset(hdr->req);
hdr->good_bytes = desc->pg_count;
hdr->dreq = desc->pg_dreq;
+ hdr->layout_private = desc->pg_layout_private;
hdr->release = release;
hdr->completion_ops = desc->pg_completion_ops;
if (hdr->completion_ops->init_hdr)
@@ -267,6 +268,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
desc->pg_error = 0;
desc->pg_lseg = NULL;
desc->pg_dreq = NULL;
+ desc->pg_layout_private = NULL;
}
/**
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 88d166b..63093b1 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -69,6 +69,7 @@ struct nfs_pageio_descriptor {
const struct nfs_pgio_completion_ops *pg_completion_ops;
struct pnfs_layout_segment *pg_lseg;
struct nfs_direct_req *pg_dreq;
+ void *pg_layout_private;
};
#define NFS_WBACK_BUSY(req) (test_bit(PG_BUSY,&(req)->wb_flags))
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 8aadd90..58023cd 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1244,6 +1244,7 @@ struct nfs_pgio_header {
void (*release) (struct nfs_pgio_header *hdr);
const struct nfs_pgio_completion_ops *completion_ops;
struct nfs_direct_req *dreq;
+ void *layout_private;
spinlock_t lock;
/* fields protected by lock */
int pnfs_error;
--
1.7.10.2.677.gb6bc67f
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