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authorAndy Adamson <andros@netapp.com>2011-05-22 20:53:10 +0400
committerBoaz Harrosh <bharrosh@panasas.com>2011-05-29 21:54:37 +0400
commit04a555498e03b3804e2dec916a4669f5f560e503 (patch)
tree4fab39683df70cee7f7aea7d7718072a811ad153 /fs
parent8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed (diff)
downloadlinux-04a555498e03b3804e2dec916a4669f5f560e503.tar.xz
pnfs: encode_layoutreturn
Add a layout driver method to encode the layout type specific opaque part of layout return in-line in the xdr stream. Currently the pnfs-objects layout driver uses it to encode i/o error information on LAYOUTRETURN. Signed-off-by: Andy Adamson <andros@netapp.com> [fixup layout header pointer for encode_layoutreturn] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4xdr.c9
-rw-r--r--fs/nfs/pnfs.h4
2 files changed, 11 insertions, 2 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index f24212064356..d464badc0067 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1920,8 +1920,13 @@ encode_layoutreturn(struct xdr_stream *xdr,
spin_lock(&args->inode->i_lock);
xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE);
spin_unlock(&args->inode->i_lock);
- p = reserve_space(xdr, 4);
- *p = cpu_to_be32(0);
+ if (NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn) {
+ NFS_SERVER(args->inode)->pnfs_curr_ld->encode_layoutreturn(
+ NFS_I(args->inode)->layout, xdr, args);
+ } else {
+ p = reserve_space(xdr, 4);
+ *p = cpu_to_be32(0);
+ }
hdr->nops++;
hdr->replen += decode_layoutreturn_maxsz;
}
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index af3967a893a1..1b6b207a8806 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -104,6 +104,10 @@ struct pnfs_layoutdriver_type {
enum pnfs_try_status (*write_pagelist) (struct nfs_write_data *nfs_data, int how);
void (*free_deviceid_node) (struct nfs4_deviceid_node *);
+
+ void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutreturn_args *args);
};
struct pnfs_layout_hdr {