2 files changed, 22 insertions, 0 deletions
diff --git a/src/shared/btrfs-util.c b/src/shared/btrfs-util.c
index 164ac9f337..e648121b47 100644
--- a/src/shared/btrfs-util.c
+++ b/src/shared/btrfs-util.c
@@ -531,3 +531,22 @@ finish:
 
         return 0;
 }
+
+int btrfs_defrag_fd(int fd) {
+        assert(fd >= 0);
+
+        if (ioctl(fd, BTRFS_IOC_DEFRAG, NULL) < 0)
+                return -errno;
+
+        return 0;
+}
+
+int btrfs_defrag(const char *p) {
+        _cleanup_close_ int fd = -1;
+
+        fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+        if (fd < 0)
+                return -errno;
+
+        return btrfs_defrag_fd(fd);
+}
diff --git a/src/shared/btrfs-util.h b/src/shared/btrfs-util.h
index 1532c120df..1bff9171d7 100644
--- a/src/shared/btrfs-util.h
+++ b/src/shared/btrfs-util.h
@@ -57,3 +57,6 @@ int btrfs_subvol_get_quota_fd(int fd, BtrfsQuotaInfo *quota);
 int btrfs_reflink(int infd, int outfd);
 
 int btrfs_get_block_device(const char *path, dev_t *dev);
+
+int btrfs_defrag_fd(int fd);
+int btrfs_defrag(const char *p);