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[Qemu-devel] [PATCH 3/6] qed: add open_conversion_target()
From: |
Devin Nakamura |
Subject: |
[Qemu-devel] [PATCH 3/6] qed: add open_conversion_target() |
Date: |
Mon, 12 Sep 2011 10:47:21 -0400 |
Signed-off-by: Devin Nakamura <address@hidden>
---
block/qed.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index 16320f5..93827db 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1456,6 +1456,62 @@ static int
bdrv_qed_get_conversion_options(BlockDriverState *bs,
return 0;
}
+static int bdrv_qed_open_conversion_target(BlockDriverState *bs,
+ BlockConversionOptions *drv_options,
+ QEMUOptionParameter *usr_options,
+ bool force)
+{
+ BDRVQEDState *s = bs->opaque;
+ s->bs = bs;
+ if (drv_options->encryption_type != BLOCK_CRYPT_NONE) {
+ error_report("Encryption not supported");
+ return -ENOTSUP;
+ }
+ if(drv_options->nb_snapshots && !force) {
+ error_report("Snapshots are not supported");
+ return -ENOTSUP;
+ }
+ s->header.magic = QED_MAGIC;
+ s->header.table_size = QED_DEFAULT_TABLE_SIZE;
+ if(qed_is_cluster_size_valid(drv_options->cluster_size)) {
+ s->header.cluster_size = drv_options->cluster_size;
+ } else {
+ error_report("Invalid cluster size");
+ return -EINVAL;
+ }
+ if(qed_is_image_size_valid(drv_options->image_size, s->header.cluster_size,
+ s->header.table_size)) {
+ s->header.image_size = drv_options->image_size;
+ } else {
+ error_report("Invalid image size");
+ return -EINVAL;
+ }
+ s->file_size = qed_Start_of_cluster(s, bs->file->total_sectors +
+ drv_options->cluster_size -1);
+ s->l1_table = qed_alloc_table(s);
+ s->header.l1_table_offset = qed_alloc_clusters(s, s->header.table_size);
+ QSIMPLEQ_INIT(&s->allocating_write_reqs);
+
+
+ if (!qed_check_table_offset(s, s->header.l1_table_offset)) {
+ error_report("Invalid L1 table offset");
+ return -EINVAL;
+ }
+
+ s->table_nelems = (s->header.cluster_size * s->header.table_size) /
+ sizeof(uint64_t);
+ s->l2_shift = ffs(s->header.cluster_size) - 1;
+ s->l2_mask = s->table_nelems - 1;
+ s->l1_shift = s->l2_shift + ffs(s->table_nelems) - 1;
+
+ qed_init_l2_cache(&s->l2_cache);
+
+ s->need_check_timer = qemu_new_timer_ns(vm_clock,
+ qed_need_check_timer_cb, s);
+ qed_write_l1_table_sync(s, 0, s->table_nelems);
+ return 0;
+}
+
static QEMUOptionParameter qed_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1503,6 +1559,7 @@ static BlockDriver bdrv_qed = {
.bdrv_change_backing_file = bdrv_qed_change_backing_file,
.bdrv_check = bdrv_qed_check,
.bdrv_get_conversion_options = bdrv_qed_get_conversion_options,
+ .bdrv_open_conversion_target = bdrv_qed_open_conversion_target,
};
static void bdrv_qed_init(void)
--
1.7.6.rc1