From 6b443ee5a4e5542def2e4fb3a3afa7d6862dd8eb Mon Sep 17 00:00:00 2001
From: Giorgos Kappes <giorgos@giorgoskappes.com>
Date: Tue, 22 Jul 2025 17:12:58 +0300
Subject: [PATCH] libcephfs: Add ceph_setlk and ceph_getlk wrapper functions

Signed-off-by: Giorgos Kappes <giorgos@giorgoskappes.com>
---
 src/include/cephfs/libcephfs.h | 26 ++++++++++++++++++++++++++
 src/libcephfs.cc               | 16 ++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/src/include/cephfs/libcephfs.h b/src/include/cephfs/libcephfs.h
index 18e44b656ee..485b51a2ac1 100644
--- a/src/include/cephfs/libcephfs.h
+++ b/src/include/cephfs/libcephfs.h
@@ -1276,6 +1276,32 @@ int ceph_utimensat(struct ceph_mount_info *cmount, int dirfd, const char *relpat
 int ceph_flock(struct ceph_mount_info *cmount, int fd, int operation,
 	       uint64_t owner);
 
+/**
+ * Test the existence of a record lock.
+ *
+ * @param cmount the ceph mount handle to use for performing the lock.
+ * @param fd the open file descriptor to test the existence of a record lock.
+ * @param pointer to an flock structure.
+ * @param owner the user-supplied owner identifier (an arbitrary integer)
+ * @returns 0 on success or negative error code on failure.
+ */ 
+ int ceph_getlk(struct ceph_mount_info *cmount, int fd, struct flock *flock,
+		uint64_t owner);
+
+/**
+ * Set a record lock.
+ *
+ * @param cmount the ceph mount handle to use for performing the lock.
+ * @param fd the open file descriptor to set a record lock
+ * @param pointer to an flock structure.
+ * @param owner the user-supplied owner identifier (an arbitrary integer)
+ * @param sleep the user-supplied sleep flag
+ * @returns 0 on success or negative error code on failure.
+ */ 
+ 
+ int ceph_setlk(struct ceph_mount_info *cmount, int fd, struct flock *flock,
+		uint64_t owner, int sleep);
+
 /**
  * Truncate the file to the given size.  If this operation causes the
  * file to expand, the empty bytes will be filled in with zeros.
diff --git a/src/libcephfs.cc b/src/libcephfs.cc
index 5102be67e76..049a47c4f53 100644
--- a/src/libcephfs.cc
+++ b/src/libcephfs.cc
@@ -1405,6 +1405,22 @@ extern "C" int ceph_flock(struct ceph_mount_info *cmount, int fd, int operation,
   return cmount->get_client()->flock(fd, operation, owner);
 }
 
+extern "C" int ceph_getlk(struct ceph_mount_info *cmount, int fd, struct flock *fl,
+			  uint64_t owner)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->getlk(fd, fl, owner);
+}
+
+extern "C" int ceph_setlk(struct ceph_mount_info *cmount, int fd, struct flock *fl,
+			  uint64_t owner, int sleep)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->setlk(fd, fl, owner, sleep);
+}
+
 extern "C" int ceph_truncate(struct ceph_mount_info *cmount, const char *path,
 			     int64_t size)
 {
-- 
2.47.3