LU-11621 utils: optimize lhsmtool_posix with copy_file_range()

[fs/lustre-release.git] / lustre / utils / lhsmtool_posix.c

diff --git a/lustre/utils/lhsmtool_posix.c b/lustre/utils/lhsmtool_posix.c
index 4f933b4..14aa197 100644 (file)
--- a/lustre/utils/lhsmtool_posix.c
+++ b/lustre/utils/lhsmtool_posix.c
@@ -59,6 +59,7 @@
 #include <libcfs/util/string.h>
 #include <linux/lustre/lustre_fid.h>
 #include <lustre/lustreapi.h>
+#include "lstddef.h"
 
 /* Progress reporting period */
 #define REPORT_INTERVAL_DEFAULT 30
@@ -656,6 +657,27 @@ static int ct_copy_data(struct hsm_copyaction_private *hcp, const char *src,
                int     chunk = (length - write_total > opt.o_chunk_size) ?
                                 opt.o_chunk_size : length - write_total;
 
+               /* Try the accelerated copy path first. Once LU-10180 lands
+                * we should deal with holes.
+                */
+               wsize = copy_file_range(src_fd, NULL, dst_fd, NULL,
+                                       chunk, 0);
+               if (wsize != -1)
+                       goto fini_fastcopy;
+               rc = -errno;
+               /* Before Linux kernel 5.3 copy_file_range only supported
+                * file copies between filesystems of the same type. In
+                * that case copy_file_range() will return -EXDEV.
+                */
+               if (rc != -EXDEV && rc != -ENOSYS) {
+                       CT_ERROR(rc, "copy_file_range failed for '%s' to '%s'",
+                                src, dst);
+                       break;
+               }
+
+               /* copy_file_range is not avalible or failed
+                * so use what works.
+                */
                rsize = pread(src_fd, buf, chunk, offset);
                if (rsize == 0)
                        /* EOF */
@@ -673,7 +695,7 @@ static int ct_copy_data(struct hsm_copyaction_private *hcp, const char *src,
                        CT_ERROR(rc, "cannot write to '%s'", dst);
                        break;
                }
-
+fini_fastcopy:
                write_total += wsize;
                offset += wsize;