[PATCH v6 01/11] libxl: make libxl_device_disk_local_attach/detach internal functions

[Stefano Stabellini <stefano.stabellini@eu.citrix.com>]

Changes in v5:

- remove _hidden from the implementation.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
---
 tools/libxl/libxl.c            |   77 ----------------------------------------
 tools/libxl/libxl.h            |    7 ----
 tools/libxl/libxl_bootloader.c |    4 +-
 tools/libxl/libxl_internal.c   |   72 +++++++++++++++++++++++++++++++++++++
 tools/libxl/libxl_internal.h   |    9 +++++
 5 files changed, 83 insertions(+), 86 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 4d01cf8..35f6ff9 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -1689,83 +1689,6 @@ out:
     return ret;
 }
 
-char * libxl_device_disk_local_attach(libxl_ctx *ctx, libxl_device_disk *disk)
-{
-    GC_INIT(ctx);
-    char *dev = NULL;
-    char *ret = NULL;
-    int rc;
-
-    rc = libxl__device_disk_setdefault(gc, disk);
-    if (rc) goto out;
-
-    switch (disk->backend) {
-        case LIBXL_DISK_BACKEND_PHY:
-            LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching PHY disk %s",
-                       disk->pdev_path);
-            dev = disk->pdev_path;
-            break;
-        case LIBXL_DISK_BACKEND_TAP:
-            switch (disk->format) {
-            case LIBXL_DISK_FORMAT_RAW:
-                /* optimise away the early tapdisk attach in this case */
-                LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching"
-                           " tap disk %s directly (ie without using blktap)",
-                           disk->pdev_path);
-                dev = disk->pdev_path;
-                break;
-            case LIBXL_DISK_FORMAT_VHD:
-                dev = libxl__blktap_devpath(gc, disk->pdev_path,
-                                            disk->format);
-                break;
-            case LIBXL_DISK_FORMAT_QCOW:
-            case LIBXL_DISK_FORMAT_QCOW2:
-                abort(); /* prevented by libxl__device_disk_set_backend */
-            default:
-                LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
-                           "unrecognized disk format: %d", disk->format);
-                break;
-            }
-            break;
-        case LIBXL_DISK_BACKEND_QDISK:
-            if (disk->format != LIBXL_DISK_FORMAT_RAW) {
-                LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "cannot locally"
-                           " attach a qdisk image if the format is not raw");
-                break;
-            }
-            LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching qdisk %s\n",
-                       disk->pdev_path);
-            dev = disk->pdev_path;
-            break;
-        default:
-            LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend "
-                "type: %d", disk->backend);
-            break;
-    }
-
- out:
-    if (dev != NULL)
-        ret = strdup(dev);
-    GC_FREE;
-    return ret;
-}
-
-int libxl_device_disk_local_detach(libxl_ctx *ctx, libxl_device_disk *disk)
-{
-    /* Nothing to do for PHYSTYPE_PHY. */
-
-    /*
-     * For other device types assume that the blktap2 process is
-     * needed by the soon to be started domain and do nothing.
-     */
-    /*
-     * FIXME
-     * This appears to leak the disk in failure paths
-     */
-
-    return 0;
-}
-
 /******************************************************************************/
 
 int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic)
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 979940a..f79a024 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -679,13 +679,6 @@ int libxl_device_disk_getinfo(libxl_ctx *ctx, uint32_t domid,
  */
 int libxl_cdrom_insert(libxl_ctx *ctx, uint32_t domid, libxl_device_disk *disk);
 
-/*
- * Make a disk available in this (the control) domain. Returns path to
- * a device.
- */
-char * libxl_device_disk_local_attach(libxl_ctx *ctx, libxl_device_disk *disk);
-int libxl_device_disk_local_detach(libxl_ctx *ctx, libxl_device_disk *disk);
-
 /* Network Interfaces */
 int libxl_device_nic_add(libxl_ctx *ctx, uint32_t domid, libxl_device_nic *nic);
 int libxl_device_nic_remove(libxl_ctx *ctx, uint32_t domid,
diff --git a/tools/libxl/libxl_bootloader.c b/tools/libxl/libxl_bootloader.c
index fb1302b..6563dbd 100644
--- a/tools/libxl/libxl_bootloader.c
+++ b/tools/libxl/libxl_bootloader.c
@@ -228,7 +228,7 @@ static void bootloader_cleanup(libxl__egc *egc, libxl__bootloader_state *bl)
     if (bl->outputdir) libxl__remove_directory(gc, bl->outputdir);
 
     if (bl->diskpath) {
-        libxl_device_disk_local_detach(CTX, bl->disk);
+        libxl__device_disk_local_detach(gc, bl->disk);
         free(bl->diskpath);
         bl->diskpath = 0;
     }
@@ -330,7 +330,7 @@ void libxl__bootloader_run(libxl__egc *egc, libxl__bootloader_state *bl)
         goto out;
     }
 
-    bl->diskpath = libxl_device_disk_local_attach(CTX, bl->disk);
+    bl->diskpath = libxl__device_disk_local_attach(gc, bl->disk);
     if (!bl->diskpath) {
         rc = ERROR_FAIL;
         goto out;
diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index b89aef7..fc771ff 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -323,6 +323,78 @@ out:
     return rc;
 }
 
+char * libxl__device_disk_local_attach(libxl__gc *gc, libxl_device_disk *disk)
+{
+    libxl_ctx *ctx = gc->owner;
+    char *dev = NULL;
+    char *ret = NULL;
+    int rc;
+
+    rc = libxl__device_disk_setdefault(gc, disk);
+    if (rc) goto out;
+
+    switch (disk->backend) {
+        case LIBXL_DISK_BACKEND_PHY:
+            LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching PHY disk %s",
+                       disk->pdev_path);
+            dev = disk->pdev_path;
+            break;
+        case LIBXL_DISK_BACKEND_TAP:
+            switch (disk->format) {
+            case LIBXL_DISK_FORMAT_RAW:
+                /* optimise away the early tapdisk attach in this case */
+                LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching"
+                           " tap disk %s directly (ie without using blktap)",
+                           disk->pdev_path);
+                dev = disk->pdev_path;
+                break;
+            case LIBXL_DISK_FORMAT_VHD:
+                dev = libxl__blktap_devpath(gc, disk->pdev_path,
+                                            disk->format);
+                break;
+            case LIBXL_DISK_FORMAT_QCOW:
+            case LIBXL_DISK_FORMAT_QCOW2:
+                abort(); /* prevented by libxl__device_disk_set_backend */
+            default:
+                LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
+                           "unrecognized disk format: %d", disk->format);
+                break;
+            }
+            break;
+        case LIBXL_DISK_BACKEND_QDISK:
+            if (disk->format != LIBXL_DISK_FORMAT_RAW) {
+                LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "cannot locally"
+                           " attach a qdisk image if the format is not raw");
+                break;
+            }
+            LIBXL__LOG(ctx, LIBXL__LOG_DEBUG, "locally attaching qdisk %s\n",
+                       disk->pdev_path);
+            dev = disk->pdev_path;
+            break;
+        default:
+            LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "unrecognized disk backend "
+                "type: %d", disk->backend);
+            break;
+    }
+
+ out:
+    if (dev != NULL)
+        ret = strdup(dev);
+    return ret;
+}
+
+int libxl__device_disk_local_detach(libxl__gc *gc, libxl_device_disk *disk)
+{
+    /* Nothing to do for PHYSTYPE_PHY. */
+
+    /*
+     * For other device types assume that the blktap2 process is
+     * needed by the soon to be started domain and do nothing.
+     */
+
+    return 0;
+}
+
 libxl_device_model_version libxl__device_model_version_running(libxl__gc *gc,
                                                                uint32_t domid)
 {
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index b2fe8bb..6449615 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1233,6 +1233,15 @@ _hidden char *libxl__blktap_devpath(libxl__gc *gc,
  */
 _hidden void libxl__device_destroy_tapdisk(libxl__gc *gc, char *be_path);
 
+/*
+ * Make a disk available in this (the control) domain. Returns path to
+ * a device.
+ */
+_hidden char * libxl__device_disk_local_attach(libxl__gc *gc,
+        libxl_device_disk *disk);
+_hidden int libxl__device_disk_local_detach(libxl__gc *gc,
+        libxl_device_disk *disk);
+
 _hidden char *libxl__uuid2string(libxl__gc *gc, const libxl_uuid uuid);
 
 struct libxl__xen_console_reader {
-- 
1.7.2.5