Re: [PATCH v4 09/27] pnfs: cleanup_layoutcommit

[Boaz Harrosh <bharrosh@panasas.com>]

On 07/28/2011 10:30 AM, Jim Rees wrote:
> From: Andy Adamson <andros@netapp.com>
> 
> This gives layout driver a chance to cleanup structures they put in at
> encode_layoutcommit.
> 
> Signed-off-by: Andy Adamson <andros@netapp.com>
> [fixup layout header pointer for layoutcommit]
> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
> Signed-off-by: Benny Halevy <bhalevy@tonian.com>
> ---
>  fs/nfs/nfs4proc.c       |    1 +
>  fs/nfs/nfs4xdr.c        |    1 +
>  fs/nfs/pnfs.c           |   10 ++++++++++
>  fs/nfs/pnfs.h           |    5 +++++
>  include/linux/nfs_xdr.h |    1 +
>  5 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> index e86de79..6cb84b4 100644
> --- a/fs/nfs/nfs4proc.c
> +++ b/fs/nfs/nfs4proc.c
> @@ -5963,6 +5963,7 @@ static void nfs4_layoutcommit_release(void *calldata)
>  	struct nfs4_layoutcommit_data *data = calldata;
>  	struct pnfs_layout_segment *lseg, *tmp;
>  
> +	pnfs_cleanup_layoutcommit(data->args.inode, data);

If inode is part of @data, which is also passed as argument then we can simplify
the API by just passing @data

>  	/* Matched by references in pnfs_set_layoutcommit */
>  	list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
>  		list_del_init(&lseg->pls_lc_list);
> diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
> index 0261669..1dce12f 100644
> --- a/fs/nfs/nfs4xdr.c
> +++ b/fs/nfs/nfs4xdr.c
> @@ -5599,6 +5599,7 @@ static int decode_layoutcommit(struct xdr_stream *xdr,
>  	int status;
>  
>  	status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
> +	res->status = status;
>  	if (status)
>  		return status;
>  
> diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
> index 3a47f7c..c1cc216 100644
> --- a/fs/nfs/pnfs.c
> +++ b/fs/nfs/pnfs.c
> @@ -1411,6 +1411,16 @@ pnfs_set_layoutcommit(struct nfs_write_data *wdata)
>  }
>  EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit);
>  
> +void pnfs_cleanup_layoutcommit(struct inode *inode,
> +			       struct nfs4_layoutcommit_data *data)
> +{
> +	struct nfs_server *nfss = NFS_SERVER(inode);
> +
> +	if (nfss->pnfs_curr_ld->cleanup_layoutcommit)
> +		nfss->pnfs_curr_ld->cleanup_layoutcommit(NFS_I(inode)->layout,
> +							 data);

Here too since data has inode then the LD can do the:
	NFS_I(data->args.inode)->layout

de-reference, and only pass @data as argument

Boaz

> +}
> +
>  /*
>   * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and
>   * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough
> diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
> index bddd8b9..f271425 100644
> --- a/fs/nfs/pnfs.h
> +++ b/fs/nfs/pnfs.h
> @@ -113,6 +113,9 @@ struct pnfs_layoutdriver_type {
>  				     struct xdr_stream *xdr,
>  				     const struct nfs4_layoutreturn_args *args);
>  
> +	void (*cleanup_layoutcommit) (struct pnfs_layout_hdr *layoutid,
> +				      struct nfs4_layoutcommit_data *data);
> +
>  	void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid,
>  				     struct xdr_stream *xdr,
>  				     const struct nfs4_layoutcommit_args *args);
> @@ -196,6 +199,8 @@ void pnfs_roc_release(struct inode *ino);
>  void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
>  bool pnfs_roc_drain(struct inode *ino, u32 *barrier);
>  void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
> +void pnfs_cleanup_layoutcommit(struct inode *inode,
> +			       struct nfs4_layoutcommit_data *data);
>  int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
>  int _pnfs_return_layout(struct inode *);
>  int pnfs_ld_write_done(struct nfs_write_data *);
> diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
> index 94f27e5..569ea5b 100644
> --- a/include/linux/nfs_xdr.h
> +++ b/include/linux/nfs_xdr.h
> @@ -269,6 +269,7 @@ struct nfs4_layoutcommit_res {
>  	struct nfs_fattr *fattr;
>  	const struct nfs_server *server;
>  	struct nfs4_sequence_res seq_res;
> +	int status;
>  };
>  
>  struct nfs4_layoutcommit_data {