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

block-migration.c

@@ -146,8 +146,7 @@ static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector)
 {
     int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK;
 
-    if (bmds->aio_bitmap &&
-        (sector << BDRV_SECTOR_BITS) < bdrv_getlength(bmds->bs)) {
+    if ((sector << BDRV_SECTOR_BITS) < bdrv_getlength(bmds->bs)) {
         return !!(bmds->aio_bitmap[chunk / (sizeof(unsigned long) * 8)] &
             (1UL << (chunk % (sizeof(unsigned long) * 8))));
     } else {
@@ -169,13 +168,9 @@ static void bmds_set_aio_inflight(BlkMigDevState *bmds, int64_t sector_num,
         bit = start % (sizeof(unsigned long) * 8);
         val = bmds->aio_bitmap[idx];
         if (set) {
-            if (!(val & (1UL << bit))) {
-                val |= 1UL << bit;
-            }
+            val |= 1UL << bit;
         } else {
-            if (val & (1UL << bit)) {
-                val &= ~(1UL << bit);
-            }
+            val &= ~(1UL << bit);
         }
         bmds->aio_bitmap[idx] = val;
     }
@@ -385,8 +380,9 @@ static int mig_save_device_dirty(Monitor *mon, QEMUFile *f,
     int nr_sectors;
 
     for (sector = bmds->cur_dirty; sector < bmds->total_sectors;) {
-        if (bmds_aio_inflight(bmds, sector))
+        if (bmds_aio_inflight(bmds, sector)) {
             qemu_aio_flush();
+        }
         if (bdrv_get_dirty(bmds->bs, sector)) {
 
             if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {

block/qcow.c

@@ -54,7 +54,6 @@ typedef struct QCowHeader {
 #define L2_CACHE_SIZE 16
 
 typedef struct BDRVQcowState {
-    BlockDriverState *hd;
     int cluster_bits;
     int cluster_size;
     int cluster_sectors;

block/qcow2.h

@@ -79,7 +79,6 @@ typedef struct QCowSnapshot {
 } QCowSnapshot;
 
 typedef struct BDRVQcowState {
-    BlockDriverState *hd;
     int cluster_bits;
     int cluster_size;
     int cluster_sectors;

block/raw-posix.c

@@ -463,7 +463,7 @@ static int raw_pwrite(BlockDriverState *bs, int64_t offset,
                 count -= ret;
                 sum += ret;
             }
-            /* here, count < 512 because (count & ~sector_mask) == 0 */
+            /* here, count < sector_size because (count & ~sector_mask) == 0 */
             if (count) {
                 ret = raw_pread_aligned(bs, offset, s->aligned_buf,
                                      bs->buffer_alignment);

block/vdi.c

@@ -186,7 +186,6 @@ typedef struct {
 } VdiHeader;
 
 typedef struct {
-    BlockDriverState *hd;
     /* The block map entries are little endian (even in memory). */
     uint32_t *bmap;
     /* Size of block (bytes). */

block/vmdk.c

@@ -61,7 +61,6 @@ typedef struct {
 #define L2_CACHE_SIZE 16
 
 typedef struct BDRVVmdkState {
-    BlockDriverState *hd;
     int64_t l1_table_offset;
     int64_t l1_backup_table_offset;
     uint32_t *l1_table;

block/vpc.c

@@ -110,8 +110,6 @@ struct vhd_dyndisk_header {
 };
 
 typedef struct BDRVVPCState {
-    BlockDriverState *hd;
-
     uint8_t footer_buf[HEADER_SIZE];
     uint64_t free_data_block_offset;
     int max_table_entries;

blockdev.c

@@ -14,6 +14,8 @@
 #include "qemu-option.h"
 #include "qemu-config.h"
 #include "sysemu.h"
+#include "hw/qdev.h"
+#include "block_int.h"
 
 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
 
@@ -597,3 +599,40 @@ int do_change_block(Monitor *mon, const char *device,
     }
     return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
 }
+
+int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+    const char *id = qdict_get_str(qdict, "id");
+    BlockDriverState *bs;
+    BlockDriverState **ptr;
+    Property *prop;
+
+    bs = bdrv_find(id);
+    if (!bs) {
+        qerror_report(QERR_DEVICE_NOT_FOUND, id);
+        return -1;
+    }
+
+    /* quiesce block driver; prevent further io */
+    qemu_aio_flush();
+    bdrv_flush(bs);
+    bdrv_close(bs);
+
+    /* clean up guest state from pointing to host resource by
+     * finding and removing DeviceState "drive" property */
+    for (prop = bs->peer->info->props; prop && prop->name; prop++) {
+        if (prop->info->type == PROP_TYPE_DRIVE) {
+            ptr = qdev_get_prop_ptr(bs->peer, prop);
+            if ((*ptr) == bs) {
+                bdrv_detach(bs, bs->peer);
+                *ptr = NULL;
+                break;
+            }
+        }
+    }
+
+    /* clean up host side */
+    drive_uninit(drive_get_by_blockdev(bs));
+
+    return 0;
+}

blockdev.h

@@ -32,7 +32,7 @@ struct DriveInfo {
 };
 
 #define MAX_IDE_DEVS	2
-#define MAX_SCSI_DEVS	7
+#define MAX_SCSI_DEVS	255
 
 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
 int drive_get_max_bus(BlockInterfaceType type);
@@ -51,5 +51,6 @@ int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data);
 int do_block_set_passwd(Monitor *mon, const QDict *qdict, QObject **ret_data);
 int do_change_block(Monitor *mon, const char *device,
                     const char *filename, const char *fmt);
+int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
 
 #endif

hmp-commands.hx

@@ -65,6 +65,24 @@ STEXI
 @item eject [-f] @var{device}
 @findex eject
 Eject a removable medium (use -f to force it).
+ETEXI
+
+    {
+        .name       = "drive_del",
+        .args_type  = "id:s",
+        .params     = "device",
+        .help       = "remove host block device",
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_drive_del,
+    },
+
+STEXI
+@item drive_del @var{device}
+@findex drive_del
+Remove host block device.  The result is that guest generated IO is no longer
+submitted against the host device underlying the disk.  Once a drive has
+been deleted, the QEMU Block layer returns -EIO which results in IO
+errors in the guest for applications that are reading/writing to the device.
 ETEXI
 
     {

hw/ide/cmd646.c

@@ -179,12 +179,8 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num,
             register_ioport_read(addr, 4, 1, bmdma_readb_1, d);
         }
 
-        register_ioport_write(addr + 4, 4, 1, bmdma_addr_writeb, bm);
-        register_ioport_read(addr + 4, 4, 1, bmdma_addr_readb, bm);
-        register_ioport_write(addr + 4, 4, 2, bmdma_addr_writew, bm);
-        register_ioport_read(addr + 4, 4, 2, bmdma_addr_readw, bm);
-        register_ioport_write(addr + 4, 4, 4, bmdma_addr_writel, bm);
-        register_ioport_read(addr + 4, 4, 4, bmdma_addr_readl, bm);
+        iorange_init(&bm->addr_ioport, &bmdma_addr_ioport_ops, addr + 4, 4);
+        ioport_register(&bm->addr_ioport);
         addr += 8;
     }
 }

hw/ide/core.c

@@ -473,11 +473,21 @@ static void dma_buf_commit(IDEState *s, int is_write)
     qemu_sglist_destroy(&s->sg);
 }
 
+static void ide_dma_set_inactive(BMDMAState *bm)
+{
+    bm->status &= ~BM_STATUS_DMAING;
+    bm->dma_cb = NULL;
+    bm->unit = -1;
+    bm->aiocb = NULL;
+}
+
 void ide_dma_error(IDEState *s)
 {
     ide_transfer_stop(s);
     s->error = ABRT_ERR;
     s->status = READY_STAT | ERR_STAT;
+    ide_dma_set_inactive(s->bus->bmdma);
+    s->bus->bmdma->status |= BM_STATUS_INT;
     ide_set_irq(s->bus);
 }
 
@@ -587,11 +597,8 @@ static void ide_read_dma_cb(void *opaque, int ret)
         s->status = READY_STAT | SEEK_STAT;
         ide_set_irq(s->bus);
     eot:
-        bm->status &= ~BM_STATUS_DMAING;
         bm->status |= BM_STATUS_INT;
-        bm->dma_cb = NULL;
-        bm->unit = -1;
-        bm->aiocb = NULL;
+        ide_dma_set_inactive(bm);
         return;
     }
 
@@ -733,11 +740,8 @@ static void ide_write_dma_cb(void *opaque, int ret)
         s->status = READY_STAT | SEEK_STAT;
         ide_set_irq(s->bus);
     eot:
-        bm->status &= ~BM_STATUS_DMAING;
         bm->status |= BM_STATUS_INT;
-        bm->dma_cb = NULL;
-        bm->unit = -1;
-        bm->aiocb = NULL;
+        ide_dma_set_inactive(bm);
         return;
     }
 
@@ -1061,11 +1065,8 @@ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret)
         s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
         ide_set_irq(s->bus);
     eot:
-        bm->status &= ~BM_STATUS_DMAING;
         bm->status |= BM_STATUS_INT;
-        bm->dma_cb = NULL;
-        bm->unit = -1;
-        bm->aiocb = NULL;
+        ide_dma_set_inactive(bm);
         return;
     }
 
@@ -2954,12 +2955,10 @@ void ide_dma_cancel(BMDMAState *bm)
             printf("aio_cancel\n");
 #endif
             bdrv_aio_cancel(bm->aiocb);
-            bm->aiocb = NULL;
         }
-        bm->status &= ~BM_STATUS_DMAING;
+
         /* cancel DMA request */
-        bm->unit = -1;
-        bm->dma_cb = NULL;
+        ide_dma_set_inactive(bm);
     }
 }
 

hw/ide/internal.h

@@ -8,6 +8,7 @@
  */
 #include <hw/ide.h>
 #include "block_int.h"
+#include "iorange.h"
 
 /* debug IDE devices */
 //#define DEBUG_IDE
@@ -496,6 +497,7 @@ struct BMDMAState {
     QEMUIOVector qiov;
     int64_t sector_num;
     uint32_t nsector;
+    IORange addr_ioport;
     QEMUBH *bh;
 };