[PATCH 2/7] ceph: use locks_inode_context helper

Jeff Layton
2022-11-16T15:17:38Z

ceph currently doesn't access i_flctx safely. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).

Cc: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/locks.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index 3e2843e86e27..f3b461c708a8 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -364,7 +364,7 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count)
*fcntl_count = 0;
*flock_count = 0;

- ctx = inode->i_flctx;
+ ctx = locks_inode_context(inode);
if (ctx) {
spin_lock(&ctx->flc_lock);
list_for_each_entry(lock, &ctx->flc_posix, fl_list)
@@ -418,7 +418,7 @@ int ceph_encode_locks_to_buffer(struct inode *inode,
int num_fcntl_locks, int num_flock_locks)
{
struct file_lock *lock;
- struct file_lock_context *ctx = inode->i_flctx;
+ struct file_lock_context *ctx = locks_inode_context(inode);
int err = 0;
int seen_fcntl = 0;
int seen_flock = 0;
--
2.38.1