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pnfs: only tear down lsegs that precede seqid in LAYOUTRETURN args

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LAYOUTRETURN is "special" in that servers and clients are expected to
work with old stateids. When the client sends a LAYOUTRETURN with an old
stateid in it then the server is expected to only tear down layout
segments that were present when that seqid was current. Ensure that the
client handles its accounting accordingly.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Jeff Layton
2016-05-17 12:28:42 -04:00
committed by Anna Schumaker
parent 3982a6a2d0
commit 6d597e1750
5 changed files with 52 additions and 28 deletions
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3
fs/nfs/callback_proc.c
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@@ -217,7 +217,8 @@ static u32 initiate_file_draining(struct nfs_client *clp,
}
if (pnfs_mark_matching_lsegs_return(lo, &free_me_list,
&args->cbl_range)) {
&args->cbl_range,
be32_to_cpu(args->cbl_stateid.seqid))) {
rv = NFS4_OK;
goto unlock;
}