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authorBenny Halevy <bhalevy@panasas.com>2011-05-22 19:53:48 +0300
committerBoaz Harrosh <bharrosh@panasas.com>2011-05-29 20:55:00 +0300
commitac7db7264ac3314cae09893bc838fcb7e83267a4 (patch)
tree7586470df26218daa8d771760615ae0d76e6788a
parentadb58535e604a564495a7d50dfb0afa0ddc21bcb (diff)
downloadlinux-ac7db7264ac3314cae09893bc838fcb7e83267a4.tar.bz2
pnfs: encode_layoutcommit
Add a layout driver method to encode the layout type specific opaque part of layout commit in-line in the xdr stream. Currently, the pnfs-objects layout driver uses it to encode metadata hints to the MDS and the blocks layout driver to commit provisionally allocated extents to the file. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
-rw-r--r--fs/nfs/nfs4xdr.c16
-rw-r--r--fs/nfs/pnfs.h4
2 files changed, 17 insertions, 3 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index d464badc0067..d869a5e5464b 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1875,6 +1875,7 @@ encode_layoutget(struct xdr_stream *xdr,
static int
encode_layoutcommit(struct xdr_stream *xdr,
+ struct inode *inode,
const struct nfs4_layoutcommit_args *args,
struct compound_hdr *hdr)
{
@@ -1883,7 +1884,7 @@ encode_layoutcommit(struct xdr_stream *xdr,
dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
NFS_SERVER(args->inode)->pnfs_curr_ld->id);
- p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
+ p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE);
*p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
/* Only whole file layouts */
p = xdr_encode_hyper(p, 0); /* offset */
@@ -1894,7 +1895,14 @@ encode_layoutcommit(struct xdr_stream *xdr,
p = xdr_encode_hyper(p, args->lastbytewritten);
*p++ = cpu_to_be32(0); /* Never send time_modify_changed */
*p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
- *p++ = cpu_to_be32(0); /* no file layout payload */
+
+ if (NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit)
+ NFS_SERVER(inode)->pnfs_curr_ld->encode_layoutcommit(
+ NFS_I(inode)->layout, xdr, args);
+ else {
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(0); /* no layout-type payload */
+ }
hdr->nops++;
hdr->replen += decode_layoutcommit_maxsz;
@@ -2751,6 +2759,8 @@ static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_layoutcommit_args *args)
{
+ struct nfs4_layoutcommit_data *data =
+ container_of(args, struct nfs4_layoutcommit_data, args);
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
@@ -2758,7 +2768,7 @@ static void nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, NFS_FH(args->inode), &hdr);
- encode_layoutcommit(xdr, args, &hdr);
+ encode_layoutcommit(xdr, data->args.inode, args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
encode_nops(&hdr);
}
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 1b6b207a8806..3fda97146777 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -108,6 +108,10 @@ struct pnfs_layoutdriver_type {
void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
struct xdr_stream *xdr,
const struct nfs4_layoutreturn_args *args);
+
+ void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutcommit_args *args);
};
struct pnfs_layout_hdr {