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[Qemu-devel] [PATCH 04/11] qcow: Use BB functions in .bdrv_create()
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 04/11] qcow: Use BB functions in .bdrv_create() |
Date: |
Tue, 8 Mar 2016 17:34:25 +0100 |
All users of the block layers are supposed to go through a BlockBackend.
The .bdrv_create() implementation is one such user, so this patch
converts it.
Signed-off-by: Kevin Wolf <address@hidden>
---
block/qcow.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/block/qcow.c b/block/qcow.c
index c46810c..2fd5ee6 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -24,6 +24,7 @@
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "block/block_int.h"
+#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include <zlib.h>
#include "qapi/qmp/qerror.h"
@@ -780,7 +781,7 @@ static int qcow_create(const char *filename, QemuOpts
*opts, Error **errp)
int flags = 0;
Error *local_err = NULL;
int ret;
- BlockDriverState *qcow_bs;
+ BlockBackend *qcow_blk;
/* Read out options */
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
@@ -796,16 +797,18 @@ static int qcow_create(const char *filename, QemuOpts
*opts, Error **errp)
goto cleanup;
}
- qcow_bs = NULL;
- ret = bdrv_open(&qcow_bs, filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
- &local_err);
- if (ret < 0) {
+ qcow_blk = blk_new_open("image", filename, NULL, NULL,
+ BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
+ &local_err);
+ if (qcow_blk == NULL) {
error_propagate(errp, local_err);
+ ret = -EIO;
goto cleanup;
}
- ret = bdrv_truncate(qcow_bs, 0);
+ blk_set_allow_write_beyond_eof(qcow_blk, true);
+
+ ret = blk_truncate(qcow_blk, 0);
if (ret < 0) {
goto exit;
}
@@ -845,13 +848,13 @@ static int qcow_create(const char *filename, QemuOpts
*opts, Error **errp)
}
/* write all the data */
- ret = bdrv_pwrite(qcow_bs, 0, &header, sizeof(header));
+ ret = blk_pwrite(qcow_blk, 0, &header, sizeof(header));
if (ret != sizeof(header)) {
goto exit;
}
if (backing_file) {
- ret = bdrv_pwrite(qcow_bs, sizeof(header),
+ ret = blk_pwrite(qcow_blk, sizeof(header),
backing_file, backing_filename_len);
if (ret != backing_filename_len) {
goto exit;
@@ -861,7 +864,7 @@ static int qcow_create(const char *filename, QemuOpts
*opts, Error **errp)
tmp = g_malloc0(BDRV_SECTOR_SIZE);
for (i = 0; i < ((sizeof(uint64_t)*l1_size + BDRV_SECTOR_SIZE - 1)/
BDRV_SECTOR_SIZE); i++) {
- ret = bdrv_pwrite(qcow_bs, header_size +
+ ret = blk_pwrite(qcow_blk, header_size +
BDRV_SECTOR_SIZE*i, tmp, BDRV_SECTOR_SIZE);
if (ret != BDRV_SECTOR_SIZE) {
g_free(tmp);
@@ -872,7 +875,7 @@ static int qcow_create(const char *filename, QemuOpts
*opts, Error **errp)
g_free(tmp);
ret = 0;
exit:
- bdrv_unref(qcow_bs);
+ blk_unref(qcow_blk);
cleanup:
g_free(backing_file);
return ret;
--
1.8.3.1
- [Qemu-devel] [PATCH 00/11] block: Use BB function in .bdrv_create() implementations, Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 05/11] qcow2: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 04/11] qcow: Use BB functions in .bdrv_create(),
Kevin Wolf <=
- [Qemu-devel] [PATCH 02/11] block: Introduce blk_set_allow_write_beyond_eof(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 07/11] sheepdog: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 03/11] parallels: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 08/11] vdi: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 09/11] vhdx: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 06/11] qed: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 01/11] block: Use writeback in .bdrv_create() implementations, Kevin Wolf, 2016/03/08
- [Qemu-devel] [PATCH 11/11] vpc: Use BB functions in .bdrv_create(), Kevin Wolf, 2016/03/08