[Qemu-devel] [PATCH] block: handle "rechs" translation option

[Paolo Bonzini <pbonzini@redhat.com>]

The rechs translation option is so obscure that we support it but do
not even attempt to parse it.  Archeologists will surely be puzzled
by this (assuming they care about QEMU and CHS translation), so fix it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 blockdev.c |  2 ++
 vl.c       | 18 ++++++++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 36ceece..5946bbe 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -776,6 +776,8 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
             translation = BIOS_ATA_TRANSLATION_NONE;
         } else if (!strcmp(value, "lba")) {
             translation = BIOS_ATA_TRANSLATION_LBA;
+        } else if (!strcmp(value, "rechs")) {
+            translation = BIOS_ATA_TRANSLATION_RECHS;
         } else if (!strcmp(value, "auto")) {
             translation = BIOS_ATA_TRANSLATION_AUTO;
         } else {
diff --git a/vl.c b/vl.c
index 7f4fe0d..f161a727f 100644
--- a/vl.c
+++ b/vl.c
@@ -3053,14 +3053,17 @@ int main(int argc, char **argv, char **envp)
                         goto chs_fail;
                     if (*p == ',') {
                         p++;
-                        if (!strcmp(p, "none"))
+                        if (!strcmp(p, "none")) {
                             translation = BIOS_ATA_TRANSLATION_NONE;
-                        else if (!strcmp(p, "lba"))
+                        } else if (!strcmp(p, "lba")) {
                             translation = BIOS_ATA_TRANSLATION_LBA;
-                        else if (!strcmp(p, "auto"))
+                        } else if (!strcmp(p, "rechs")) {
+                            translation = BIOS_ATA_TRANSLATION_RECHS;
+                        } else if (!strcmp(p, "auto")) {
                             translation = BIOS_ATA_TRANSLATION_AUTO;
-                        else
+                        } else {
                             goto chs_fail;
+                        }
                     } else if (*p != '\0') {
                     chs_fail:
                         fprintf(stderr, "qemu: invalid physical CHS format\n");
@@ -3074,10 +3077,13 @@ int main(int argc, char **argv, char **envp)
                         qemu_opt_set(hda_opts, "heads", num);
                         snprintf(num, sizeof(num), "%d", secs);
                         qemu_opt_set(hda_opts, "secs", num);
-                        if (translation == BIOS_ATA_TRANSLATION_LBA)
+                        if (translation == BIOS_ATA_TRANSLATION_RECHS) {
+                            qemu_opt_set(hda_opts, "trans", "rechs");
+                        } else if (translation == BIOS_ATA_TRANSLATION_LBA) {
                             qemu_opt_set(hda_opts, "trans", "lba");
-                        if (translation == BIOS_ATA_TRANSLATION_NONE)
+                        } else if (translation == BIOS_ATA_TRANSLATION_NONE) {
                             qemu_opt_set(hda_opts, "trans", "none");
+                        }
                     }
                 }
                 break;
-- 
1.8.4.2