NFSv4.1: filelayout async error handler
Use our own async error handler. Mark the layout as failed and retry i/o through the MDS on specified errors. Update the mds_offset in nfs_readpage_retry so that a failed short-read retry to a DS gets correctly resent through the MDS. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Trond Myklebust

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dc70d7b318
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@@ -1020,6 +1020,7 @@ struct nfs_read_data {
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struct pnfs_layout_segment *lseg;
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struct nfs_client *ds_clp; /* pNFS data server */
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const struct rpc_call_ops *mds_ops;
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int (*read_done_cb) (struct rpc_task *task, struct nfs_read_data *data);
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__u64 mds_offset;
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struct page *page_array[NFS_PAGEVEC_SIZE];
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};
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