qemu-img.c: Re-factor img_create()

This patch re-factors img_create() moving the code doing the actual
work into block.c where it can be shared with QEMU. This is needed to
be able to create images from QEMU to be used for live snapshots.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 2 insertions, 106 deletions

diff --git a/qemu-img.c b/qemu-img.c
index f576cfb..0ff179f 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -288,9 +288,6 @@ static int img_create(int argc, char **argv)
     const char *base_fmt = NULL;
     const char *filename;
     const char *base_filename = NULL;
-    BlockDriver *drv, *proto_drv;
-    QEMUOptionParameter *param = NULL, *create_options = NULL;
-    QEMUOptionParameter *backing_fmt = NULL;
     char *options = NULL;
 
     for(;;) {
@@ -351,110 +348,9 @@ static int img_create(int argc, char **argv)
         goto out;
     }
 
-    /* Find driver and parse its options */
-    drv = bdrv_find_format(fmt);
-    if (!drv) {
-        error("Unknown file format '%s'", fmt);
-        ret = -1;
-        goto out;
-    }
-
-    proto_drv = bdrv_find_protocol(filename);
-    if (!proto_drv) {
-        error("Unknown protocol '%s'", filename);
-        ret = -1;
-        goto out;
-    }
-
-    create_options = append_option_parameters(create_options,
-                                              drv->create_options);
-    create_options = append_option_parameters(create_options,
-                                              proto_drv->create_options);
-
-    /* Create parameter list with default values */
-    param = parse_option_parameters("", create_options, param);
-
-    set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size);
-
-    /* Parse -o options */
-    if (options) {
-        param = parse_option_parameters(options, create_options, param);
-        if (param == NULL) {
-            error("Invalid options for file format '%s'.", fmt);
-            ret = -1;
-            goto out;
-        }
-    }
-
-    /* Add old-style options to parameters */
-    ret = add_old_style_options(fmt, param, base_filename, base_fmt);
-    if (ret < 0) {
-        goto out;
-    }
-
-    backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT);
-    if (backing_fmt && backing_fmt->value.s) {
-        if (!bdrv_find_format(backing_fmt->value.s)) {
-            error("Unknown backing file format '%s'",
-                  backing_fmt->value.s);
-            ret = -1;
-            goto out;
-        }
-    }
-
-    // The size for the image must always be specified, with one exception:
-    // If we are using a backing file, we can obtain the size from there
-    if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) {
-
-        QEMUOptionParameter *backing_file =
-            get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
-
-        if (backing_file && backing_file->value.s) {
-            BlockDriverState *bs;
-            uint64_t size;
-            const char *fmt = NULL;
-            char buf[32];
-
-            if (backing_fmt && backing_fmt->value.s) {
-                fmt = backing_fmt->value.s;
-            }
-
-            bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS);
-            if (!bs) {
-                ret = -1;
-                goto out;
-            }
-            bdrv_get_geometry(bs, &size);
-            size *= 512;
-            bdrv_delete(bs);
-
-            snprintf(buf, sizeof(buf), "%" PRId64, size);
-            set_option_parameter(param, BLOCK_OPT_SIZE, buf);
-        } else {
-            error("Image creation needs a size parameter");
-            ret = -1;
-            goto out;
-        }
-    }
-
-    printf("Formatting '%s', fmt=%s ", filename, fmt);
-    print_option_parameters(param);
-    puts("");
-
-    ret = bdrv_create(drv, filename, param);
-
-    if (ret < 0) {
-        if (ret == -ENOTSUP) {
-            error("Formatting or formatting option not supported for file format '%s'", fmt);
-        } else if (ret == -EFBIG) {
-            error("The image size is too large for file format '%s'", fmt);
-        } else {
-            error("%s: error while creating %s: %s", filename, fmt, strerror(-ret));
-        }
-    }
+    ret = bdrv_img_create(filename, fmt, base_filename, base_fmt,
+                          options, img_size, BDRV_O_FLAGS);
 out:
-    free_option_parameters(create_options);
-    free_option_parameters(param);
     if (ret) {
         return 1;
     }