[PULL 23/35] block: Add blk_co_pwrite_compressed()

[Hanna Reitz]

From: Alberto Faria <afaria@redhat.com>

Also convert blk_pwrite_compressed() into a generated_co_wrapper.

Signed-off-by: Alberto Faria <afaria@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220705161527.1054072-12-afaria@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
 include/sysemu/block-backend-io.h |  7 +++++--
 block/block-backend.c             |  8 ++++----
 tests/unit/test-block-iothread.c  | 18 ++++++++++++++++++
 3 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/include/sysemu/block-backend-io.h 
b/include/sysemu/block-backend-io.h
index 695b793a72..8500a63102 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -167,8 +167,11 @@ int blk_flush(BlockBackend *blk);
 
 int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
 
-int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, int64_t bytes,
-                          const void *buf);
+int generated_co_wrapper blk_pwrite_compressed(BlockBackend *blk,
+                                               int64_t offset, int64_t bytes,
+                                               const void *buf);
+int coroutine_fn blk_co_pwrite_compressed(BlockBackend *blk, int64_t offset,
+                                          int64_t bytes, const void *buf);
 int blk_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
 int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
                       int64_t bytes, BdrvRequestFlags flags);
diff --git a/block/block-backend.c b/block/block-backend.c
index 60fb7eb3f2..f07a76aa5a 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -2314,13 +2314,13 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend 
*blk, int64_t offset,
                           flags | BDRV_REQ_ZERO_WRITE);
 }
 
-int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, int64_t bytes,
-                          const void *buf)
+int coroutine_fn blk_co_pwrite_compressed(BlockBackend *blk, int64_t offset,
+                                          int64_t bytes, const void *buf)
 {
     QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
     IO_OR_GS_CODE();
-    return blk_pwritev_part(blk, offset, bytes, &qiov, 0,
-                            BDRV_REQ_WRITE_COMPRESSED);
+    return blk_co_pwritev_part(blk, offset, bytes, &qiov, 0,
+                               BDRV_REQ_WRITE_COMPRESSED);
 }
 
 int blk_truncate(BlockBackend *blk, int64_t offset, bool exact,
diff --git a/tests/unit/test-block-iothread.c b/tests/unit/test-block-iothread.c
index 274e9e3653..3a46886784 100644
--- a/tests/unit/test-block-iothread.c
+++ b/tests/unit/test-block-iothread.c
@@ -198,6 +198,20 @@ static void test_sync_op_blk_pwritev_part(BlockBackend 
*blk)
     g_assert_cmpint(ret, ==, -EIO);
 }
 
+static void test_sync_op_blk_pwrite_compressed(BlockBackend *blk)
+{
+    uint8_t buf[512] = { 0 };
+    int ret;
+
+    /* Late error: Not supported */
+    ret = blk_pwrite_compressed(blk, 0, sizeof(buf), buf);
+    g_assert_cmpint(ret, ==, -ENOTSUP);
+
+    /* Early error: Negative offset */
+    ret = blk_pwrite_compressed(blk, -2, sizeof(buf), buf);
+    g_assert_cmpint(ret, ==, -EIO);
+}
+
 static void test_sync_op_load_vmstate(BdrvChild *c)
 {
     uint8_t buf[512];
@@ -377,6 +391,10 @@ const SyncOpTest sync_op_tests[] = {
         .name   = "/sync-op/pwritev_part",
         .fn     = NULL,
         .blkfn  = test_sync_op_blk_pwritev_part,
+    }, {
+        .name   = "/sync-op/pwrite_compressed",
+        .fn     = NULL,
+        .blkfn  = test_sync_op_blk_pwrite_compressed,
     }, {
         .name   = "/sync-op/load_vmstate",
         .fn     = test_sync_op_load_vmstate,
-- 
2.35.3