mkfs-util: Add support for btrfs compression

Corresponding PR in btrfs-progs: kdave/btrfs-progs#882
jamlee-t · Feb 17, 2025 · 42839ef · 42839ef
1 parent 480f72c
commit 42839ef
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Showing 2 changed files with 20 additions and 0 deletions.
diff --git a/man/repart.d.xml b/man/repart.d.xml
@@ -877,6 +877,12 @@
                 <entry>lz4, lz4hc, lzma, deflate, libdeflate, zstd</entry>
                 <entry><member><citerefentry project='man-pages'><refentrytitle>mkfs.erofs</refentrytitle><manvolnum>1</manvolnum></citerefentry></member></entry>
               </row>
+
+              <row>
+                <entry><constant>btrfs</constant></entry>
+                <entry>zlib, lzo, zstd</entry>
+                <entry><member><citerefentry project='man-pages'><refentrytitle>mkfs.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry></member></entry>
+              </row>
             </tbody>
           </tgroup>
         </table>

diff --git a/src/shared/mkfs-util.c b/src/shared/mkfs-util.c
@@ -461,6 +461,20 @@ int make_filesystem(
                 if (quiet && strv_extend(&argv, "-q") < 0)
                         return log_oom();
 
+                if (compression) {
+                        _cleanup_free_ char *c = NULL;
+
+                        c = strdup(compression);
+                        if (!c)
+                                return log_oom();
+
+                        if (compression_level && !strextend(&c, ":", compression_level))
+                                return log_oom();
+
+                        if (strv_extend_many(&argv, "--compress", c) < 0)
+                                return log_oom();
+                }
+
                 /* mkfs.btrfs unconditionally warns about several settings changing from v5.15 onwards which
                  * isn't silenced by "-q", so let's redirect stdout to /dev/null as well. */
                 if (quiet)