Merge remote-tracking branch 'kwolf/for-anthony' into staging

* kwolf/for-anthony: (38 commits)
  qemu-iotests: Fix test 031 for qcow2 v3 support
  qemu-iotests: Add -o and make v3 the default for qcow2
  qcow2: Zero write support
  qemu-iotests: Test backing file COW with zero clusters
  qemu-iotests: add a simple test for write_zeroes
  qcow2: Support for feature table header extension
  qcow2: Support reading zero clusters
  qcow2: Version 3 images
  qcow2: Ignore reserved bits in check_refcounts
  qcow2: Ignore reserved bits in refcount table entries
  qcow2: Simplify count_cow_clusters
  qcow2: Refactor qcow2_free_any_clusters
  qcow2: Ignore reserved bits in L1/L2 entries
  qcow2: Fail write_compressed when overwriting data
  qcow2: Ignore reserved bits in count_contiguous_clusters()
  qcow2: Ignore reserved bits in get_cluster_offset
  qcow2: Save disk size in snapshot header
  Specification for qcow2 version 3
  qcow2: Fix refcount block allocation during qcow2_alloc_cluster_at()
  iotests: Resolve test failures caused by hostname
  ...

2 files changed, 100 insertions, 40 deletions

diff --git a/hw/ide/core.c b/hw/ide/core.c
index 35723fd800..a5216a6aac 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -471,40 +471,68 @@ static void ide_rw_error(IDEState *s) {
     ide_set_irq(s->bus);
 }
 
+static void ide_sector_read_cb(void *opaque, int ret)
+{
+    IDEState *s = opaque;
+    int n;
+
+    s->pio_aiocb = NULL;
+    s->status &= ~BUSY_STAT;
+
+    bdrv_acct_done(s->bs, &s->acct);
+    if (ret != 0) {
+        if (ide_handle_rw_error(s, -ret, BM_STATUS_PIO_RETRY |
+                                BM_STATUS_RETRY_READ)) {
+            return;
+        }
+    }
+
+    n = s->nsector;
+    if (n > s->req_nb_sectors) {
+        n = s->req_nb_sectors;
+    }
+
+    /* Allow the guest to read the io_buffer */
+    ide_transfer_start(s, s->io_buffer, n * BDRV_SECTOR_SIZE, ide_sector_read);
+
+    ide_set_irq(s->bus);
+
+    ide_set_sector(s, ide_get_sector(s) + n);
+    s->nsector -= n;
+}
+
 void ide_sector_read(IDEState *s)
 {
     int64_t sector_num;
-    int ret, n;
+    int n;
 
     s->status = READY_STAT | SEEK_STAT;
     s->error = 0; /* not needed by IDE spec, but needed by Windows */
     sector_num = ide_get_sector(s);
     n = s->nsector;
+
     if (n == 0) {
-        /* no more sector to read from disk */
         ide_transfer_stop(s);
-    } else {
+        return;
+    }
+
+    s->status |= BUSY_STAT;
+
+    if (n > s->req_nb_sectors) {
+        n = s->req_nb_sectors;
+    }
+
 #if defined(DEBUG_IDE)
-        printf("read sector=%" PRId64 "\n", sector_num);
+    printf("sector=%" PRId64 "\n", sector_num);
 #endif
-        if (n > s->req_nb_sectors)
-            n = s->req_nb_sectors;
 
-        bdrv_acct_start(s->bs, &s->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
-        ret = bdrv_read(s->bs, sector_num, s->io_buffer, n);
-        bdrv_acct_done(s->bs, &s->acct);
-        if (ret != 0) {
-            if (ide_handle_rw_error(s, -ret,
-                BM_STATUS_PIO_RETRY | BM_STATUS_RETRY_READ))
-            {
-                return;
-            }
-        }
-        ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_read);
-        ide_set_irq(s->bus);
-        ide_set_sector(s, sector_num + n);
-        s->nsector -= n;
-    }
+    s->iov.iov_base = s->io_buffer;
+    s->iov.iov_len  = n * BDRV_SECTOR_SIZE;
+    qemu_iovec_init_external(&s->qiov, &s->iov, 1);
+
+    bdrv_acct_start(s->bs, &s->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
+    s->pio_aiocb = bdrv_aio_readv(s->bs, sector_num, &s->qiov, n,
+                                  ide_sector_read_cb, s);
 }
 
 static void dma_buf_commit(IDEState *s)
@@ -660,40 +688,39 @@ static void ide_sector_write_timer_cb(void *opaque)
     ide_set_irq(s->bus);
 }
 
-void ide_sector_write(IDEState *s)
+static void ide_sector_write_cb(void *opaque, int ret)
 {
-    int64_t sector_num;
-    int ret, n, n1;
-
-    s->status = READY_STAT | SEEK_STAT;
-    sector_num = ide_get_sector(s);
-#if defined(DEBUG_IDE)
-    printf("write sector=%" PRId64 "\n", sector_num);
-#endif
-    n = s->nsector;
-    if (n > s->req_nb_sectors)
-        n = s->req_nb_sectors;
+    IDEState *s = opaque;
+    int n;
 
-    bdrv_acct_start(s->bs, &s->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
-    ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
     bdrv_acct_done(s->bs, &s->acct);
 
+    s->pio_aiocb = NULL;
+    s->status &= ~BUSY_STAT;
+
     if (ret != 0) {
-        if (ide_handle_rw_error(s, -ret, BM_STATUS_PIO_RETRY))
+        if (ide_handle_rw_error(s, -ret, BM_STATUS_PIO_RETRY)) {
             return;
+        }
     }
 
+    n = s->nsector;
+    if (n > s->req_nb_sectors) {
+        n = s->req_nb_sectors;
+    }
     s->nsector -= n;
     if (s->nsector == 0) {
         /* no more sectors to write */
         ide_transfer_stop(s);
     } else {
-        n1 = s->nsector;
-        if (n1 > s->req_nb_sectors)
+        int n1 = s->nsector;
+        if (n1 > s->req_nb_sectors) {
             n1 = s->req_nb_sectors;
-        ide_transfer_start(s, s->io_buffer, 512 * n1, ide_sector_write);
+        }
+        ide_transfer_start(s, s->io_buffer, n1 * BDRV_SECTOR_SIZE,
+                           ide_sector_write);
     }
-    ide_set_sector(s, sector_num + n);
+    ide_set_sector(s, ide_get_sector(s) + n);
 
     if (win2k_install_hack && ((++s->irq_count % 16) == 0)) {
         /* It seems there is a bug in the Windows 2000 installer HDD
@@ -709,6 +736,30 @@ void ide_sector_write(IDEState *s)
     }
 }
 
+void ide_sector_write(IDEState *s)
+{
+    int64_t sector_num;
+    int n;
+
+    s->status = READY_STAT | SEEK_STAT | BUSY_STAT;
+    sector_num = ide_get_sector(s);
+#if defined(DEBUG_IDE)
+    printf("sector=%" PRId64 "\n", sector_num);
+#endif
+    n = s->nsector;
+    if (n > s->req_nb_sectors) {
+        n = s->req_nb_sectors;
+    }
+
+    s->iov.iov_base = s->io_buffer;
+    s->iov.iov_len  = n * BDRV_SECTOR_SIZE;
+    qemu_iovec_init_external(&s->qiov, &s->iov, 1);
+
+    bdrv_acct_start(s->bs, &s->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
+    s->pio_aiocb = bdrv_aio_writev(s->bs, sector_num, &s->qiov, n,
+                                   ide_sector_write_cb, s);
+}
+
 static void ide_flush_cb(void *opaque, int ret)
 {
     IDEState *s = opaque;
@@ -1765,6 +1816,12 @@ static void ide_reset(IDEState *s)
 #ifdef DEBUG_IDE
     printf("ide: reset\n");
 #endif
+
+    if (s->pio_aiocb) {
+        bdrv_aio_cancel(s->pio_aiocb);
+        s->pio_aiocb = NULL;
+    }
+
     if (s->drive_kind == IDE_CFATA)
         s->mult_sectors = 0;
     else
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 100efd3076..f8a027d0e4 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -385,6 +385,9 @@ struct IDEState {
     int cd_sector_size;
     int atapi_dma; /* true if dma is requested for the packet cmd */
     BlockAcctCookie acct;
+    BlockDriverAIOCB *pio_aiocb;
+    struct iovec iov;
+    QEMUIOVector qiov;
     /* ATA DMA state */
     int io_buffer_size;
     QEMUSGList sg;