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| author | Andy Adamson <andros@netapp.com> | 2011-05-22 19:53:10 +0300 |
|---|---|---|
| committer | Boaz Harrosh <bharrosh@panasas.com> | 2011-05-29 20:54:37 +0300 |
| commit | 04a555498e03b3804e2dec916a4669f5f560e503 (patch) | |
| tree | 4fab39683df70cee7f7aea7d7718072a811ad153 | |
| parent | 8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed (diff) | |
| download | lwn-04a555498e03b3804e2dec916a4669f5f560e503.tar.gz lwn-04a555498e03b3804e2dec916a4669f5f560e503.zip | |
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>
| -rw-r--r-- | fs/nfs/nfs4xdr.c | 9 | ||||
| -rw-r--r-- | fs/nfs/pnfs.h | 4 |
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 { |