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NFS41: add pg_layout_private to nfs_pageio_descriptor 

To allow layout driver to pass private information around
pg_init/pg_doio.

Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Peng Tao 2012-08-02 15:36:09 +03:00 committed by Trond Myklebust
parent 21d1f58aed
commit f616638409
3 changed files with 4 additions and 0 deletions
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2
fs/nfs/pagelist.c
View File

@ -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)
@ -268,6 +269,7 @@ 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;
}
EXPORT_SYMBOL_GPL(nfs_pageio_init);

1
include/linux/nfs_page.h
View File

@ -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))

1
include/linux/nfs_xdr.h
View File

@ -1248,6 +1248,7 @@ 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;