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-rw-r--r--src/shared/btrfs-util.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/shared/btrfs-util.h b/src/shared/btrfs-util.h
index 28dbeb4e27..c8f798b6a6 100644
--- a/src/shared/btrfs-util.h
+++ b/src/shared/btrfs-util.h
@@ -28,6 +28,7 @@ int btrfs_subvol_make(const char *path);
int btrfs_subvol_remove(const char *path);
int btrfs_subvol_snapshot(const char *old_path, const char *new_path, bool read_only, bool fallback_copy);
int btrfs_subvol_read_only(const char *path, bool b);
+int btrfs_subvol_is_read_only_fd(int fd);
int btrfs_reflink(int infd, int outfd);