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Re: [Qemu-devel] [PATCH 04/10] block/json: Add functions for writing zer


From: Max Reitz
Subject: Re: [Qemu-devel] [PATCH 04/10] block/json: Add functions for writing zeroes etc.
Date: Wed, 05 Mar 2014 21:03:25 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0

On 05.03.2014 17:09, Benoît Canet wrote:
The Monday 03 Mar 2014 à 16:28:47 (+0100), Max Reitz wrote :
Add passthrough functions for bdrv_aio_discard(),
bdrv_co_write_zeroes(), bdrv_truncate() and bdrv_has_zero_init().

Signed-off-by: Max Reitz <address@hidden>
---
  block/json.c | 30 ++++++++++++++++++++++++++++++
  1 file changed, 30 insertions(+)

diff --git a/block/json.c b/block/json.c
index 2f885cc..a2f4691 100644
--- a/block/json.c
+++ b/block/json.c
@@ -98,6 +98,21 @@ static BlockDriverAIOCB *json_aio_flush(BlockDriverState *bs,
      return bdrv_aio_flush(bs->file, cb, opaque);
  }
+static BlockDriverAIOCB *json_aio_discard(BlockDriverState *bs,
+                                          int64_t sector_num, int nb_sectors,
+                                          BlockDriverCompletionFunc *cb,
+                                          void *opaque)
+{
+    return bdrv_aio_discard(bs, sector_num, nb_sectors, cb, opaque);
Isn't it bs->file ?

Oh, you're right, I'll fix it.

Max


+}
+
+static coroutine_fn int json_co_write_zeroes(BlockDriverState *bs,
+                                             int64_t sector_num, int 
nb_sectors,
+                                             BdrvRequestFlags flags)
+{
+    return bdrv_co_write_zeroes(bs, sector_num, nb_sectors, flags);
same

+}
+
  static void json_invalidate_cache(BlockDriverState *bs)
  {
      return bdrv_invalidate_cache(bs->file);
@@ -108,6 +123,16 @@ static int64_t json_getlength(BlockDriverState *bs)
      return bdrv_getlength(bs->file);
  }
+static int json_truncate(BlockDriverState *bs, int64_t offset)
+{
+    return bdrv_truncate(bs->file, offset);
+}
+
+static int json_has_zero_init(BlockDriverState *bs)
+{
+    return bdrv_has_zero_init(bs->file);
+}
+
  static int json_refresh_limits(BlockDriverState *bs)
  {
      bs->bl = bs->file->bl;
@@ -131,12 +156,17 @@ static BlockDriver bdrv_json = {
      .bdrv_aio_readv             = json_aio_readv,
      .bdrv_aio_writev            = json_aio_writev,
      .bdrv_aio_flush             = json_aio_flush,
+    .bdrv_aio_discard           = json_aio_discard,
+
+    .bdrv_co_write_zeroes       = json_co_write_zeroes,
.bdrv_invalidate_cache = json_invalidate_cache, .has_variable_length = true,
      .bdrv_getlength             = json_getlength,
+    .bdrv_truncate              = json_truncate,
+ .bdrv_has_zero_init = json_has_zero_init,
      .bdrv_refresh_limits        = json_refresh_limits,
      .bdrv_get_info              = json_get_info,
--
1.9.0






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