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From:   Jeff Layton <jlayton@kernel.org>
To:     linux-fsdevel@vger.kernel.org
Cc:     linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org,
        linux-cifs@vger.kernel.org, chuck.lever@oracle.com,
        viro@zeniv.linux.org.uk, hch@lst.de
Subject: [PATCH 7/7] nfsd: use locks_inode_context helper
Date:   Wed, 16 Nov 2022 10:17:26 -0500
Message-Id: <20221116151726.129217-8-jlayton@kernel.org>
In-Reply-To: <20221116151726.129217-1-jlayton@kernel.org>
References: <20221116151726.129217-1-jlayton@kernel.org>
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nfsd currently doesn't access i_flctx safely everywhere. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).

Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/nfsd/nfs4state.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 836bd825ca4a..da8d0ea66229 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4758,7 +4758,7 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
 
 static bool nfsd4_deleg_present(const struct inode *inode)
 {
-	struct file_lock_context *ctx = smp_load_acquire(&inode->i_flctx);
+	struct file_lock_context *ctx = locks_inode_context(inode);
 
 	return ctx && !list_empty_careful(&ctx->flc_lease);
 }
@@ -5897,7 +5897,7 @@ nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo)
 
 	list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {
 		nf = stp->st_stid.sc_file;
-		ctx = nf->fi_inode->i_flctx;
+		ctx = locks_inode_context(nf->fi_inode);
 		if (!ctx)
 			continue;
 		if (locks_owner_has_blockers(ctx, lo))
@@ -7713,7 +7713,7 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
 	}
 
 	inode = locks_inode(nf->nf_file);
-	flctx = inode->i_flctx;
+	flctx = locks_inode_context(inode);
 
 	if (flctx && !list_empty_careful(&flctx->flc_posix)) {
 		spin_lock(&flctx->flc_lock);
-- 
2.38.1