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NFSv4.1/pnfs: Handle LAYOUTGET return values correctly
According to RFC5661 section 18.43.3, if the server cannot satisfy the loga_minlength argument to LAYOUTGET, there are 2 cases: 1) If loga_minlength == 0, it returns NFS4ERR_LAYOUTTRYLATER 2) If loga_minlength != 0, it returns NFS4ERR_BADLAYOUT Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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4ae93560b1
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1 changed files with 14 additions and 1 deletions
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@ -7780,11 +7780,20 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
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switch (task->tk_status) {
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case 0:
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goto out;
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/*
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* NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
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* length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
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*/
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case -NFS4ERR_BADLAYOUT:
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goto out_overflow;
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/*
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* NFS4ERR_LAYOUTTRYLATER is a conflict with another client
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* (or clients) writing to the same RAID stripe
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* (or clients) writing to the same RAID stripe except when
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* the minlength argument is 0 (see RFC5661 section 18.43.3).
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*/
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case -NFS4ERR_LAYOUTTRYLATER:
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if (lgp->args.minlength == 0)
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goto out_overflow;
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/*
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* NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
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* existing layout before getting a new one).
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@ -7840,6 +7849,10 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
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rpc_restart_call_prepare(task);
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out:
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dprintk("<-- %s\n", __func__);
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return;
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out_overflow:
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task->tk_status = -EOVERFLOW;
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goto out;
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}
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static size_t max_response_pages(struct nfs_server *server)
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