linux-kernel - [PATCH AUTOSEL 5.10 6/8] NFSD: Fix nfsd_breaker_owns

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Date:   Mon, 28 Mar 2022 15:43:20 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chuck Lever <chuck.lever@...cle.com>, Dai Ngo <dai.ngo@...cle.com>,
        Sasha Levin <sashal@...nel.org>, bfields@...ldses.org,
        jlayton@...chiereds.net, linux-nfs@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 6/8] NFSD: Fix nfsd_breaker_owns_lease() return values

From: Chuck Lever <chuck.lever@...cle.com>

[ Upstream commit 50719bf3442dd6cd05159e9c98d020b3919ce978 ]

These have been incorrect since the function was introduced.

A proper kerneldoc comment is added since this function, though
static, is part of an external interface.

Reported-by: Dai Ngo <dai.ngo@...cle.com>
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/nfsd/nfs4state.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d01d7929753e..84dd68091f42 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4607,6 +4607,14 @@ nfsd_break_deleg_cb(struct file_lock *fl)
 	return ret;
 }
 
+/**
+ * nfsd_breaker_owns_lease - Check if lease conflict was resolved
+ * @fl: Lock state to check
+ *
+ * Return values:
+ *   %true: Lease conflict was resolved
+ *   %false: Lease conflict was not resolved.
+ */
 static bool nfsd_breaker_owns_lease(struct file_lock *fl)
 {
 	struct nfs4_delegation *dl = fl->fl_owner;
@@ -4614,11 +4622,11 @@ static bool nfsd_breaker_owns_lease(struct file_lock *fl)
 	struct nfs4_client *clp;
 
 	if (!i_am_nfsd())
-		return NULL;
+		return false;
 	rqst = kthread_data(current);
 	/* Note rq_prog == NFS_ACL_PROGRAM is also possible: */
 	if (rqst->rq_prog != NFS_PROGRAM || rqst->rq_vers < 4)
-		return NULL;
+		return false;
 	clp = *(rqst->rq_lease_breaker);
 	return dl->dl_stid.sc_client == clp;
 }
-- 
2.34.1