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NFSv4: Don't hold the layoutget locks across multiple RPC calls 

When doing layoutget as part of the open() compound, we have to be
careful to release the layout locks before we can call any further RPC
calls, such as setattr(). The reason is that those calls could trigger
a recall, which could deadlock.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2022-05-14 10:08:14 -04:00 committed by Anna Schumaker
parent 126966dded
commit 6949493884
1 changed files with 4 additions and 0 deletions
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4
fs/nfs/nfs4proc.c
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@ -3098,6 +3098,10 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
}
out:
if (opendata->lgp) {
nfs4_lgopen_release(opendata->lgp);
opendata->lgp = NULL;
}
if (!opendata->cancelled)
nfs4_sequence_free_slot(&opendata->o_res.seq_res);
return ret;