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nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET

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Also take care to stop waiting if someone clears retry bit.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
This commit is contained in:
Peng Tao 2014-12-01 08:22:23 +08:00 • committed by Tom Haynes
parent 012fa16dca
commit aa8a45ee97
3 changed files with 45 additions and 3 deletions
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4
fs/nfs/nfs4proc.c
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@ -7796,7 +7796,9 @@ static void nfs4_layoutreturn_release(void *calldata)
spin_lock(&lo->plh_inode->i_lock);
if (lrp->res.lrs_present)
pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags);
smp_mb__after_atomic();
wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
lo->plh_block_lgets--;