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nfsd: nfsd4_process_open2() must reference the delegation stateid

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Ensure that nfsd4_process_open2() keeps a reference to the delegation
stateid until it is done working with it. Necessary step toward
client_mutex removal.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2014-07-29 21:34:18 -04:00 committed by J. Bruce Fields
parent 67cb1279be
commit dcd94cc2e7
1 changed files with 13 additions and 5 deletions
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18
fs/nfsd/nfs4state.c
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@ -3325,6 +3325,8 @@ static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, statei
ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID);
if (!ret)
return NULL;
/* FIXME: move into find_stateid_by_type */
atomic_inc(&ret->sc_count);
return delegstateid(ret);
}
@ -3340,14 +3342,18 @@ nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open,
{
int flags;
__be32 status = nfserr_bad_stateid;
struct nfs4_delegation *deleg;
*dp = find_deleg_stateid(cl, &open->op_delegate_stateid);
if (*dp == NULL)
deleg = find_deleg_stateid(cl, &open->op_delegate_stateid);
if (deleg == NULL)
goto out;
flags = share_access_to_flags(open->op_share_access);
status = nfs4_check_delegmode(*dp, flags);
if (status)
*dp = NULL;
status = nfs4_check_delegmode(deleg, flags);
if (status) {
nfs4_put_stid(&deleg->dl_stid);
goto out;
}
*dp = deleg;
out:
if (!nfsd4_is_deleg_cur(open))
return nfs_ok;
@ -3828,6 +3834,8 @@ out:
if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) &&
!nfsd4_has_session(&resp->cstate))
open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM;
if (dp)
nfs4_put_stid(&dp->dl_stid);
return status;
}