[PATCH v8 3/8] bootdevice: Add interface to gather LCHS

[Sam Eiderman <sameid@google.com>]

From: Sam Eiderman <shmuel.eiderman@oracle.com>

Add an interface to provide direct logical CHS values for boot devices.
We will use this interface in the next commits.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
Signed-off-by: Sam Eiderman <sameid@google.com>
---
 bootdevice.c            | 55 +++++++++++++++++++++++++++++++++++++++++
 include/sysemu/sysemu.h |  3 +++
 2 files changed, 58 insertions(+)

diff --git a/bootdevice.c b/bootdevice.c
index 1d225202f9..bc5e1c2de4 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -343,3 +343,58 @@ void device_add_bootindex_property(Object *obj, int32_t *bootindex,
     /* initialize devices' bootindex property to -1 */
     object_property_set_int(obj, -1, name, NULL);
 }
+
+typedef struct FWLCHSEntry FWLCHSEntry;
+
+struct FWLCHSEntry {
+    QTAILQ_ENTRY(FWLCHSEntry) link;
+    DeviceState *dev;
+    char *suffix;
+    uint32_t lcyls;
+    uint32_t lheads;
+    uint32_t lsecs;
+};
+
+static QTAILQ_HEAD(, FWLCHSEntry) fw_lchs =
+    QTAILQ_HEAD_INITIALIZER(fw_lchs);
+
+void add_boot_device_lchs(DeviceState *dev, const char *suffix,
+                          uint32_t lcyls, uint32_t lheads, uint32_t lsecs)
+{
+    FWLCHSEntry *node;
+
+    if (!lcyls && !lheads && !lsecs) {
+        return;
+    }
+
+    assert(dev != NULL || suffix != NULL);
+
+    node = g_malloc0(sizeof(FWLCHSEntry));
+    node->suffix = g_strdup(suffix);
+    node->dev = dev;
+    node->lcyls = lcyls;
+    node->lheads = lheads;
+    node->lsecs = lsecs;
+
+    QTAILQ_INSERT_TAIL(&fw_lchs, node, link);
+}
+
+void del_boot_device_lchs(DeviceState *dev, const char *suffix)
+{
+    FWLCHSEntry *i;
+
+    if (dev == NULL) {
+        return;
+    }
+
+    QTAILQ_FOREACH(i, &fw_lchs, link) {
+        if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
+             i->dev == dev) {
+            QTAILQ_REMOVE(&fw_lchs, i, link);
+            g_free(i->suffix);
+            g_free(i);
+
+            break;
+        }
+    }
+}
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 44f18eb739..5bc5c79cbc 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -103,6 +103,9 @@ void device_add_bootindex_property(Object *obj, int32_t *bootindex,
                                    DeviceState *dev, Error **errp);
 void restore_boot_order(void *opaque);
 void validate_bootdevices(const char *devices, Error **errp);
+void add_boot_device_lchs(DeviceState *dev, const char *suffix,
+                          uint32_t lcyls, uint32_t lheads, uint32_t lsecs);
+void del_boot_device_lchs(DeviceState *dev, const char *suffix);
 
 /* handler to set the boot_device order for a specific type of MachineClass */
 typedef void QEMUBootSetHandler(void *opaque, const char *boot_order,
-- 
2.23.0.700.g56cf767bdb-goog