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

28 files changed, 825 insertions, 712 deletions

diff --git a/Makefile.objs b/Makefile.objs
index c05f5e5..44ce368 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -14,7 +14,7 @@ oslib-obj-$(CONFIG_POSIX) += oslib-posix.o
 # block-obj-y is code used by both qemu system emulation and qemu-img
 
 block-obj-y = cutils.o cache-utils.o qemu-malloc.o qemu-option.o module.o async.o
-block-obj-y += nbd.o block.o aio.o aes.o qemu-config.o
+block-obj-y += nbd.o block.o aio.o aes.o qemu-config.o qemu-progress.o qemu-sockets.o
 block-obj-$(CONFIG_POSIX) += posix-aio-compat.o
 block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
 
@@ -94,7 +94,7 @@ common-obj-$(CONFIG_SSI_SD) += ssi-sd.o
 common-obj-$(CONFIG_SD) += sd.o
 common-obj-y += bt.o bt-host.o bt-vhci.o bt-l2cap.o bt-sdp.o bt-hci.o bt-hid.o usb-bt.o
 common-obj-y += bt-hci-csr.o
-common-obj-y += buffered_file.o migration.o migration-tcp.o qemu-sockets.o
+common-obj-y += buffered_file.o migration.o migration-tcp.o
 common-obj-y += qemu-char.o savevm.o #aio.o
 common-obj-y += msmouse.o ps2.o
 common-obj-y += qdev.o qdev-properties.o
diff --git a/block-migration.c b/block-migration.c
index 8218bac..576e55a 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -140,7 +140,7 @@ static inline void add_avg_read_time(int64_t time)
 static inline long double compute_read_bwidth(void)
 {
     assert(block_mig_state.total_time != 0);
-    return  (block_mig_state.reads * BLOCK_SIZE)/ block_mig_state.total_time;
+    return (block_mig_state.reads / block_mig_state.total_time) * BLOCK_SIZE;
 }
 
 static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector)
diff --git a/block.c b/block.c
index c8e2f97..f731c7a 100644
--- a/block.c
+++ b/block.c
@@ -697,14 +697,22 @@ void bdrv_close_all(void)
     }
 }
 
+/* make a BlockDriverState anonymous by removing from bdrv_state list.
+   Also, NULL terminate the device_name to prevent double remove */
+void bdrv_make_anon(BlockDriverState *bs)
+{
+    if (bs->device_name[0] != '\0') {
+        QTAILQ_REMOVE(&bdrv_states, bs, list);
+    }
+    bs->device_name[0] = '\0';
+}
+
 void bdrv_delete(BlockDriverState *bs)
 {
     assert(!bs->peer);
 
     /* remove from list, if necessary */
-    if (bs->device_name[0] != '\0') {
-        QTAILQ_REMOVE(&bdrv_states, bs, list);
-    }
+    bdrv_make_anon(bs);
 
     bdrv_close(bs);
     if (bs->file != NULL) {
@@ -1153,14 +1161,12 @@ int64_t bdrv_getlength(BlockDriverState *bs)
     if (!drv)
         return -ENOMEDIUM;
 
-    /* Fixed size devices use the total_sectors value for speed instead of
-       issuing a length query (like lseek) on each call.  Also, legacy block
-       drivers don't provide a bdrv_getlength function and must use
-       total_sectors. */
-    if (!bs->growable || !drv->bdrv_getlength) {
-        return bs->total_sectors * BDRV_SECTOR_SIZE;
+    if (bs->growable || bs->removable) {
+        if (drv->bdrv_getlength) {
+            return drv->bdrv_getlength(bs);
+        }
     }
-    return drv->bdrv_getlength(bs);
+    return bs->total_sectors * BDRV_SECTOR_SIZE;
 }
 
 /* return 0 as number of sectors if no device present or error */
@@ -2809,6 +2815,8 @@ void bdrv_set_locked(BlockDriverState *bs, int locked)
 {
     BlockDriver *drv = bs->drv;
 
+    trace_bdrv_set_locked(bs, locked);
+
     bs->locked = locked;
     if (drv && drv->bdrv_set_locked) {
         drv->bdrv_set_locked(bs, locked);
diff --git a/block.h b/block.h
index 5d78fc0..52e9cad 100644
--- a/block.h
+++ b/block.h
@@ -66,6 +66,7 @@ int bdrv_create(BlockDriver *drv, const char* filename,
     QEMUOptionParameter *options);
 int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
 BlockDriverState *bdrv_new(const char *device_name);
+void bdrv_make_anon(BlockDriverState *bs);
 void bdrv_delete(BlockDriverState *bs);
 int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
 int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
diff --git a/block/nbd.c b/block/nbd.c
index c8dc763..1d6b225 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -29,96 +29,152 @@
 #include "qemu-common.h"
 #include "nbd.h"
 #include "module.h"
+#include "qemu_socket.h"
 
 #include <sys/types.h>
 #include <unistd.h>
 
 #define EN_OPTSTR ":exportname="
 
+/* #define DEBUG_NBD */
+
+#if defined(DEBUG_NBD)
+#define logout(fmt, ...) \
+                fprintf(stderr, "nbd\t%-24s" fmt, __func__, ##__VA_ARGS__)
+#else
+#define logout(fmt, ...) ((void)0)
+#endif
+
 typedef struct BDRVNBDState {
     int sock;
     off_t size;
     size_t blocksize;
+    char *export_name; /* An NBD server may export several devices */
+
+    /* If it begins with  '/', this is a UNIX domain socket. Otherwise,
+     * it's a string of the form <hostname|ip4|\[ip6\]>:port
+     */
+    char *host_spec;
 } BDRVNBDState;
 
-static int nbd_open(BlockDriverState *bs, const char* filename, int flags)
+static int nbd_config(BDRVNBDState *s, const char *filename, int flags)
 {
-    BDRVNBDState *s = bs->opaque;
-    uint32_t nbdflags;
-
     char *file;
-    char *name;
-    const char *host;
+    char *export_name;
+    const char *host_spec;
     const char *unixpath;
-    int sock;
-    off_t size;
-    size_t blocksize;
-    int ret;
     int err = -EINVAL;
 
     file = qemu_strdup(filename);
 
-    name = strstr(file, EN_OPTSTR);
-    if (name) {
-        if (name[strlen(EN_OPTSTR)] == 0) {
+    export_name = strstr(file, EN_OPTSTR);
+    if (export_name) {
+        if (export_name[strlen(EN_OPTSTR)] == 0) {
             goto out;
         }
-        name[0] = 0;
-        name += strlen(EN_OPTSTR);
+        export_name[0] = 0; /* truncate 'file' */
+        export_name += strlen(EN_OPTSTR);
+        s->export_name = qemu_strdup(export_name);
     }
 
-    if (!strstart(file, "nbd:", &host)) {
+    /* extract the host_spec - fail if it's not nbd:... */
+    if (!strstart(file, "nbd:", &host_spec)) {
         goto out;
     }
 
-    if (strstart(host, "unix:", &unixpath)) {
-
-        if (unixpath[0] != '/') {
+    /* are we a UNIX or TCP socket? */
+    if (strstart(host_spec, "unix:", &unixpath)) {
+        if (unixpath[0] != '/') { /* We demand  an absolute path*/
             goto out;
         }
-
-        sock = unix_socket_outgoing(unixpath);
-
+        s->host_spec = qemu_strdup(unixpath);
     } else {
-        uint16_t port = NBD_DEFAULT_PORT;
-        char *p, *r;
-        char hostname[128];
+        s->host_spec = qemu_strdup(host_spec);
+    }
 
-        pstrcpy(hostname, 128, host);
+    err = 0;
 
-        p = strchr(hostname, ':');
-        if (p != NULL) {
-            *p = '\0';
-            p++;
+out:
+    qemu_free(file);
+    if (err != 0) {
+        qemu_free(s->export_name);
+        qemu_free(s->host_spec);
+    }
+    return err;
+}
 
-            port = strtol(p, &r, 0);
-            if (r == p) {
-                goto out;
-            }
-        }
+static int nbd_establish_connection(BlockDriverState *bs)
+{
+    BDRVNBDState *s = bs->opaque;
+    int sock;
+    int ret;
+    off_t size;
+    size_t blocksize;
+    uint32_t nbdflags;
 
-        sock = tcp_socket_outgoing(hostname, port);
+    if (s->host_spec[0] == '/') {
+        sock = unix_socket_outgoing(s->host_spec);
+    } else {
+        sock = tcp_socket_outgoing_spec(s->host_spec);
     }
 
+    /* Failed to establish connection */
     if (sock == -1) {
-        err = -errno;
-        goto out;
+        logout("Failed to establish connection to NBD server\n");
+        return -errno;
     }
 
-    ret = nbd_receive_negotiate(sock, name, &nbdflags, &size, &blocksize);
+    /* NBD handshake */
+    ret = nbd_receive_negotiate(sock, s->export_name, &nbdflags, &size,
+                                &blocksize);
     if (ret == -1) {
-        err = -errno;
-        goto out;
+        logout("Failed to negotiate with the NBD server\n");
+        closesocket(sock);
+        return -errno;
     }
 
+    /* Now that we're connected, set the socket to be non-blocking */
+    socket_set_nonblock(sock);
+
     s->sock = sock;
     s->size = size;
     s->blocksize = blocksize;
-    err = 0;
 
-out:
-    qemu_free(file);
-    return err;
+    logout("Established connection with NBD server\n");
+    return 0;
+}
+
+static void nbd_teardown_connection(BlockDriverState *bs)
+{
+    BDRVNBDState *s = bs->opaque;
+    struct nbd_request request;
+
+    request.type = NBD_CMD_DISC;
+    request.handle = (uint64_t)(intptr_t)bs;
+    request.from = 0;
+    request.len = 0;
+    nbd_send_request(s->sock, &request);
+
+    closesocket(s->sock);
+}
+
+static int nbd_open(BlockDriverState *bs, const char* filename, int flags)
+{
+    BDRVNBDState *s = bs->opaque;
+    int result;
+
+    /* Pop the config into our state object. Exit if invalid. */
+    result = nbd_config(s, filename, flags);
+    if (result != 0) {
+        return result;
+    }
+
+    /* establish TCP connection, return error if it fails
+     * TODO: Configurable retry-until-timeout behaviour.
+     */
+    result = nbd_establish_connection(bs);
+
+    return result;
 }
 
 static int nbd_read(BlockDriverState *bs, int64_t sector_num,
@@ -183,16 +239,7 @@ static int nbd_write(BlockDriverState *bs, int64_t sector_num,
 
 static void nbd_close(BlockDriverState *bs)
 {
-    BDRVNBDState *s = bs->opaque;
-    struct nbd_request request;
-
-    request.type = NBD_CMD_DISC;
-    request.handle = (uint64_t)(intptr_t)bs;
-    request.from = 0;
-    request.len = 0;
-    nbd_send_request(s->sock, &request);
-
-    close(s->sock);
+    nbd_teardown_connection(bs);
 }
 
 static int64_t nbd_getlength(BlockDriverState *bs)
diff --git a/blockdev.c b/blockdev.c
index bbe92fe..5429621 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -737,8 +737,6 @@ 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) {
@@ -755,24 +753,17 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
     bdrv_flush(bs);
     bdrv_close(bs);
 
-    /* clean up guest state from pointing to host resource by
-     * finding and removing DeviceState "drive" property */
+    /* if we have a device associated with this BlockDriverState (bs->peer)
+     * then we need to make the drive anonymous until the device
+     * can be removed.  If this is a drive with no device backing
+     * then we can just get rid of the block driver state right here.
+     */
     if (bs->peer) {
-        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;
-                }
-            }
-        }
+        bdrv_make_anon(bs);
+    } else {
+        drive_uninit(drive_get_by_blockdev(bs));
     }
 
-    /* clean up host side */
-    drive_uninit(drive_get_by_blockdev(bs));
-
     return 0;
 }
 
diff --git a/hw/fdc.c b/hw/fdc.c
index 9fdbc75..edf0360 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -36,6 +36,7 @@
 #include "qdev-addr.h"
 #include "blockdev.h"
 #include "sysemu.h"
+#include "block_int.h"
 
 /********************************************************/
 /* debug Floppy devices */
@@ -82,6 +83,7 @@ typedef struct FDrive {
     uint8_t max_track;        /* Nb of tracks           */
     uint16_t bps;             /* Bytes per sector       */
     uint8_t ro;               /* Is read-only           */
+    uint8_t media_changed;    /* Is media changed       */
 } FDrive;
 
 static void fd_init(FDrive *drv)
@@ -533,16 +535,63 @@ static CPUWriteMemoryFunc * const fdctrl_mem_write_strict[3] = {
     NULL,
 };
 
+static void fdrive_media_changed_pre_save(void *opaque)
+{
+    FDrive *drive = opaque;
+
+    drive->media_changed = drive->bs->media_changed;
+}
+
+static int fdrive_media_changed_post_load(void *opaque, int version_id)
+{
+    FDrive *drive = opaque;
+
+    if (drive->bs != NULL) {
+        drive->bs->media_changed = drive->media_changed;
+    }
+
+    /* User ejected the floppy when drive->bs == NULL */
+    return 0;
+}
+
+static bool fdrive_media_changed_needed(void *opaque)
+{
+    FDrive *drive = opaque;
+
+    return (drive->bs != NULL && drive->bs->media_changed != 1);
+}
+
+static const VMStateDescription vmstate_fdrive_media_changed = {
+    .name = "fdrive/media_changed",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .pre_save = fdrive_media_changed_pre_save,
+    .post_load = fdrive_media_changed_post_load,
+    .fields      = (VMStateField[]) {
+        VMSTATE_UINT8(media_changed, FDrive),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription vmstate_fdrive = {
     .name = "fdrive",
     .version_id = 1,
     .minimum_version_id = 1,
     .minimum_version_id_old = 1,
-    .fields      = (VMStateField []) {
+    .fields      = (VMStateField[]) {
         VMSTATE_UINT8(head, FDrive),
         VMSTATE_UINT8(track, FDrive),
         VMSTATE_UINT8(sect, FDrive),
         VMSTATE_END_OF_LIST()
+    },
+    .subsections = (VMStateSubsection[]) {
+        {
+            .vmsd = &vmstate_fdrive_media_changed,
+            .needed = &fdrive_media_changed_needed,
+        } , {
+            /* empty */
+        }
     }
 };
 
diff --git a/hw/ide.h b/hw/ide.h
index 73fb550..34d9394 100644
--- a/hw/ide.h
+++ b/hw/ide.h
@@ -28,4 +28,7 @@ void mmio_ide_init (target_phys_addr_t membase, target_phys_addr_t membase2,
 
 void ide_get_bs(BlockDriverState *bs[], BusState *qbus);
 
+/* ide/core.c */
+void ide_drive_get(DriveInfo **hd, int max_bus);
+
 #endif /* HW_IDE_H */
diff --git a/hw/ide/core.c b/hw/ide/core.c
index 007a4ee..c11d457 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -2826,3 +2826,17 @@ const VMStateDescription vmstate_ide_bus = {
         VMSTATE_END_OF_LIST()
     }
 };
+
+void ide_drive_get(DriveInfo **hd, int max_bus)
+{
+    int i;
+
+    if (drive_get_max_bus(IF_IDE) >= max_bus) {
+        fprintf(stderr, "qemu: too many IDE bus: %d\n", max_bus);
+        exit(1);
+    }
+
+    for(i = 0; i < max_bus * MAX_IDE_DEVS; i++) {
+        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
+    }
+}
diff --git a/hw/mips_fulong2e.c b/hw/mips_fulong2e.c
index f5ae639..0e90d68 100644
--- a/hw/mips_fulong2e.c
+++ b/hw/mips_fulong2e.c
@@ -338,14 +338,7 @@ static void mips_fulong2e_init(ram_addr_t ram_size, const char *boot_device,
     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 
     /* South bridge */
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
-    }
+    ide_drive_get(hd, MAX_IDE_BUS);
 
     via_devfn = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
     if (via_devfn < 0) {
diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index d8baa6d..bf0d76d 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -905,15 +905,7 @@ void mips_malta_init (ram_addr_t ram_size,
     pci_bus = gt64120_register(i8259);
 
     /* Southbridge */
-
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
-    }
+    ide_drive_get(hd, MAX_IDE_BUS);
 
     piix4_devfn = piix4_init(pci_bus, 80);
     isa_bus_irqs(i8259);
diff --git a/hw/mips_r4k.c b/hw/mips_r4k.c
index 8feb461..2834a46 100644
--- a/hw/mips_r4k.c
+++ b/hw/mips_r4k.c
@@ -287,15 +287,7 @@ void mips_r4k_init (ram_addr_t ram_size,
     if (nd_table[0].vlan)
         isa_ne2000_init(0x300, 9, &nd_table[0]);
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
-    }
-
+    ide_drive_get(hd, MAX_IDE_BUS);
     for(i = 0; i < MAX_IDE_BUS; i++)
         isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
                      hd[MAX_IDE_DEVS * i],
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index b3ede89..4d54ca1 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -129,15 +129,7 @@ static void pc_init1(ram_addr_t ram_size,
             pci_nic_init_nofail(nd, "e1000", NULL);
     }
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
-    }
-
+    ide_drive_get(hd, MAX_IDE_BUS);
     if (pci_enabled) {
         PCIDevice *dev;
         dev = pci_piix3_ide_init(pci_bus, hd, piix3_devfn + 1);
diff --git a/hw/ppc_newworld.c b/hw/ppc_newworld.c
index b9245f0..86f1cfb 100644
--- a/hw/ppc_newworld.c
+++ b/hw/ppc_newworld.c
@@ -325,20 +325,13 @@ static void ppc_core99_init (ram_addr_t ram_size,
     for(i = 0; i < nb_nics; i++)
         pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
+    ide_drive_get(hd, MAX_IDE_BUS);
     dbdma = DBDMA_init(&dbdma_mem_index);
 
     /* We only emulate 2 out of 3 IDE controllers for now */
     ide_mem_index[0] = -1;
-    hd[0] = drive_get(IF_IDE, 0, 0);
-    hd[1] = drive_get(IF_IDE, 0, 1);
     ide_mem_index[1] = pmac_ide_init(hd, pic[0x0d], dbdma, 0x16, pic[0x02]);
-    hd[0] = drive_get(IF_IDE, 1, 0);
-    hd[1] = drive_get(IF_IDE, 1, 1);
-    ide_mem_index[2] = pmac_ide_init(hd, pic[0x0e], dbdma, 0x1a, pic[0x02]);
+    ide_mem_index[2] = pmac_ide_init(&hd[MAX_IDE_DEVS], pic[0x0e], dbdma, 0x1a, pic[0x02]);
 
     /* cuda also initialize ADB */
     if (machine_arch == ARCH_MAC99_U3) {
diff --git a/hw/ppc_oldworld.c b/hw/ppc_oldworld.c
index 8a4e088..75a3127 100644
--- a/hw/ppc_oldworld.c
+++ b/hw/ppc_oldworld.c
@@ -236,21 +236,16 @@ static void ppc_heathrow_init (ram_addr_t ram_size,
         pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
 
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
+    ide_drive_get(hd, MAX_IDE_BUS);
 
     /* First IDE channel is a MAC IDE on the MacIO bus */
-    hd[0] = drive_get(IF_IDE, 0, 0);
-    hd[1] = drive_get(IF_IDE, 0, 1);
     dbdma = DBDMA_init(&dbdma_mem_index);
     ide_mem_index[0] = -1;
     ide_mem_index[1] = pmac_ide_init(hd, pic[0x0D], dbdma, 0x16, pic[0x02]);
 
     /* Second IDE channel is a CMD646 on the PCI bus */
-    hd[0] = drive_get(IF_IDE, 1, 0);
-    hd[1] = drive_get(IF_IDE, 1, 1);
+    hd[0] = hd[MAX_IDE_DEVS];
+    hd[1] = hd[MAX_IDE_DEVS + 1];
     hd[3] = hd[2] = NULL;
     pci_cmd646_ide_init(pci_bus, hd, 0);
 
diff --git a/hw/ppc_prep.c b/hw/ppc_prep.c
index 5615ef9..0e9cfc2 100644
--- a/hw/ppc_prep.c
+++ b/hw/ppc_prep.c
@@ -681,15 +681,7 @@ static void ppc_prep_init (ram_addr_t ram_size,
         }
     }
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
-    }
-
+    ide_drive_get(hd, MAX_IDE_BUS);
     for(i = 0; i < MAX_IDE_BUS; i++) {
         isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
                      hd[2 * i],
diff --git a/hw/sun4u.c b/hw/sun4u.c
index dbb5a15..5eb38cf 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -793,14 +793,7 @@ static void sun4uv_init(ram_addr_t RAM_size,
     for(i = 0; i < nb_nics; i++)
         pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
 
-    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
-        fprintf(stderr, "qemu: too many IDE bus\n");
-        exit(1);
-    }
-    for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
-        hd[i] = drive_get(IF_IDE, i / MAX_IDE_DEVS,
-                          i % MAX_IDE_DEVS);
-    }
+    ide_drive_get(hd, MAX_IDE_BUS);
 
     pci_cmd646_ide_init(pci_bus, hd, 1);
 
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index b14fb99..91e0394 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -290,6 +290,10 @@ static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb)
         virtio_blk_rw_complete(req, -EIO);
         return;
     }
+    if (req->qiov.size % req->dev->conf->logical_block_size) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
 
     if (mrb->num_writes == 32) {
         virtio_submit_multiwrite(req->dev->bs, mrb);
@@ -317,6 +321,10 @@ static void virtio_blk_handle_read(VirtIOBlockReq *req)
         virtio_blk_rw_complete(req, -EIO);
         return;
     }
+    if (req->qiov.size % req->dev->conf->logical_block_size) {
+        virtio_blk_rw_complete(req, -EIO);
+        return;
+    }
 
     acb = bdrv_aio_readv(req->dev->bs, sector, &req->qiov,
                          req->qiov.size / BDRV_SECTOR_SIZE,
diff --git a/hw/xen_disk.c b/hw/xen_disk.c
index 445bf03..558bf8a 100644
--- a/hw/xen_disk.c
+++ b/hw/xen_disk.c
@@ -310,7 +310,7 @@ static int ioreq_runio_qemu_sync(struct ioreq *ioreq)
     off_t pos;
 
     if (ioreq->req.nr_segments && ioreq_map(ioreq) == -1)
-	goto err;
+	goto err_no_map;
     if (ioreq->presync)
 	bdrv_flush(blkdev->bs);
 
@@ -364,6 +364,9 @@ static int ioreq_runio_qemu_sync(struct ioreq *ioreq)
     return 0;
 
 err:
+    ioreq_unmap(ioreq);
+err_no_map:
+    ioreq_finish(ioreq);
     ioreq->status = BLKIF_RSP_ERROR;
     return -1;
 }
@@ -393,7 +396,7 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
     struct XenBlkDev *blkdev = ioreq->blkdev;
 
     if (ioreq->req.nr_segments && ioreq_map(ioreq) == -1)
-	goto err;
+	goto err_no_map;
 
     ioreq->aio_inflight++;
     if (ioreq->presync)
@@ -427,6 +430,9 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
     return 0;
 
 err:
+    ioreq_unmap(ioreq);
+err_no_map:
+    ioreq_finish(ioreq);
     ioreq->status = BLKIF_RSP_ERROR;
     return -1;
 }
diff --git a/nbd.c b/nbd.c
index d8ebc42..0dcd86b 100644
--- a/nbd.c
+++ b/nbd.c
@@ -49,7 +49,7 @@
 
 /* This is all part of the "official" NBD API */
 
-#define NBD_REPLY_SIZE		(4 + 4 + 8)
+#define NBD_REPLY_SIZE          (4 + 4 + 8)
 #define NBD_REQUEST_MAGIC       0x25609513
 #define NBD_REPLY_MAGIC         0x67446698
 
@@ -59,11 +59,11 @@
 #define NBD_DO_IT               _IO(0xab, 3)
 #define NBD_CLEAR_SOCK          _IO(0xab, 4)
 #define NBD_CLEAR_QUE           _IO(0xab, 5)
-#define NBD_PRINT_DEBUG	        _IO(0xab, 6)
-#define NBD_SET_SIZE_BLOCKS	_IO(0xab, 7)
+#define NBD_PRINT_DEBUG         _IO(0xab, 6)
+#define NBD_SET_SIZE_BLOCKS     _IO(0xab, 7)
 #define NBD_DISCONNECT          _IO(0xab, 8)
 
-#define NBD_OPT_EXPORT_NAME	(1 << 0)
+#define NBD_OPT_EXPORT_NAME     (1 << 0)
 
 /* That's all folks */
 
@@ -107,155 +107,55 @@ size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read)
     return offset;
 }
 
-int tcp_socket_outgoing(const char *address, uint16_t port)
+static void combine_addr(char *buf, size_t len, const char* address,
+                         uint16_t port)
 {
-    int s;
-    struct in_addr in;
-    struct sockaddr_in addr;
-
-    s = socket(PF_INET, SOCK_STREAM, 0);
-    if (s == -1) {
-        return -1;
-    }
-
-    if (inet_aton(address, &in) == 0) {
-        struct hostent *ent;
-
-        ent = gethostbyname(address);
-        if (ent == NULL) {
-            goto error;
-        }
-
-        memcpy(&in, ent->h_addr, sizeof(in));
-    }
-
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(port);
-    memcpy(&addr.sin_addr.s_addr, &in, sizeof(in));
-
-    if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
-        goto error;
+    /* If the address-part contains a colon, it's an IPv6 IP so needs [] */
+    if (strstr(address, ":")) {
+        snprintf(buf, len, "[%s]:%u", address, port);
+    } else {
+        snprintf(buf, len, "%s:%u", address, port);
     }
-
-    return s;
-error:
-    closesocket(s);
-    return -1;
 }
 
-int tcp_socket_incoming(const char *address, uint16_t port)
+int tcp_socket_outgoing(const char *address, uint16_t port)
 {
-    int s;
-    struct in_addr in;
-    struct sockaddr_in addr;
-    int opt;
-
-    s = socket(PF_INET, SOCK_STREAM, 0);
-    if (s == -1) {
-        return -1;
-    }
-
-    if (inet_aton(address, &in) == 0) {
-        struct hostent *ent;
-
-        ent = gethostbyname(address);
-        if (ent == NULL) {
-            goto error;
-        }
-
-        memcpy(&in, ent->h_addr, sizeof(in));
-    }
-
-    addr.sin_family = AF_INET;
-    addr.sin_port = htons(port);
-    memcpy(&addr.sin_addr.s_addr, &in, sizeof(in));
-
-    opt = 1;
-    if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
-                   (const void *) &opt, sizeof(opt)) == -1) {
-        goto error;
-    }
-
-    if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
-        goto error;
-    }
-
-    if (listen(s, 128) == -1) {
-        goto error;
-    }
-
-    return s;
-error:
-    closesocket(s);
-    return -1;
+    char address_and_port[128];
+    combine_addr(address_and_port, 128, address, port);
+    return tcp_socket_outgoing_spec(address_and_port);
 }
 
-#ifndef _WIN32
-int unix_socket_incoming(const char *path)
+int tcp_socket_outgoing_spec(const char *address_and_port)
 {
-    int s;
-    struct sockaddr_un addr;
-
-    s = socket(PF_UNIX, SOCK_STREAM, 0);
-    if (s == -1) {
-        return -1;
-    }
-
-    memset(&addr, 0, sizeof(addr));
-    addr.sun_family = AF_UNIX;
-    pstrcpy(addr.sun_path, sizeof(addr.sun_path), path);
-
-    if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
-        goto error;
-    }
-
-    if (listen(s, 128) == -1) {
-        goto error;
-    }
-
-    return s;
-error:
-    closesocket(s);
-    return -1;
+    return inet_connect(address_and_port, SOCK_STREAM);
 }
 
-int unix_socket_outgoing(const char *path)
+int tcp_socket_incoming(const char *address, uint16_t port)
 {
-    int s;
-    struct sockaddr_un addr;
-
-    s = socket(PF_UNIX, SOCK_STREAM, 0);
-    if (s == -1) {
-        return -1;
-    }
-
-    memset(&addr, 0, sizeof(addr));
-    addr.sun_family = AF_UNIX;
-    pstrcpy(addr.sun_path, sizeof(addr.sun_path), path);
-
-    if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
-        goto error;
-    }
+    char address_and_port[128];
+    combine_addr(address_and_port, 128, address, port);
+    return tcp_socket_incoming_spec(address_and_port);
+}
 
-    return s;
-error:
-    closesocket(s);
-    return -1;
+int tcp_socket_incoming_spec(const char *address_and_port)
+{
+    char *ostr  = NULL;
+    int olen = 0;
+    return inet_listen(address_and_port, ostr, olen, SOCK_STREAM, 0);
 }
-#else
+
 int unix_socket_incoming(const char *path)
 {
-    errno = ENOTSUP;
-    return -1;
+    char *ostr = NULL;
+    int olen = 0;
+
+    return unix_listen(path, ostr, olen);
 }
 
 int unix_socket_outgoing(const char *path)
 {
-    errno = ENOTSUP;
-    return -1;
+    return unix_connect(path);
 }
-#endif
-
 
 /* Basic flow
 
@@ -273,241 +173,241 @@ int unix_socket_outgoing(const char *path)
 
 int nbd_negotiate(int csock, off_t size)
 {
-	char buf[8 + 8 + 8 + 128];
-
-	/* Negotiate
-	   [ 0 ..   7]   passwd   ("NBDMAGIC")
-	   [ 8 ..  15]   magic    (0x00420281861253)
-	   [16 ..  23]   size
-	   [24 .. 151]   reserved (0)
-	 */
-
-	TRACE("Beginning negotiation.");
-	memcpy(buf, "NBDMAGIC", 8);
-	cpu_to_be64w((uint64_t*)(buf + 8), 0x00420281861253LL);
-	cpu_to_be64w((uint64_t*)(buf + 16), size);
-	memset(buf + 24, 0, 128);
-
-	if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
-		LOG("write failed");
-		errno = EINVAL;
-		return -1;
-	}
-
-	TRACE("Negotation succeeded.");
-
-	return 0;
+    char buf[8 + 8 + 8 + 128];
+
+    /* Negotiate
+        [ 0 ..   7]   passwd   ("NBDMAGIC")
+        [ 8 ..  15]   magic    (0x00420281861253)
+        [16 ..  23]   size
+        [24 .. 151]   reserved (0)
+     */
+
+    TRACE("Beginning negotiation.");
+    memcpy(buf, "NBDMAGIC", 8);
+    cpu_to_be64w((uint64_t*)(buf + 8), 0x00420281861253LL);
+    cpu_to_be64w((uint64_t*)(buf + 16), size);
+    memset(buf + 24, 0, 128);
+
+    if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
+        LOG("write failed");
+        errno = EINVAL;
+        return -1;
+    }
+
+    TRACE("Negotation succeeded.");
+
+    return 0;
 }
 
 int nbd_receive_negotiate(int csock, const char *name, uint32_t *flags,
                           off_t *size, size_t *blocksize)
 {
-	char buf[256];
-	uint64_t magic, s;
-	uint16_t tmp;
-
-	TRACE("Receiving negotation.");
-
-	if (read_sync(csock, buf, 8) != 8) {
-		LOG("read failed");
-		errno = EINVAL;
-		return -1;
-	}
-
-	buf[8] = '\0';
-	if (strlen(buf) == 0) {
-		LOG("server connection closed");
-		errno = EINVAL;
-		return -1;
-	}
-
-	TRACE("Magic is %c%c%c%c%c%c%c%c",
-	      qemu_isprint(buf[0]) ? buf[0] : '.',
-	      qemu_isprint(buf[1]) ? buf[1] : '.',
-	      qemu_isprint(buf[2]) ? buf[2] : '.',
-	      qemu_isprint(buf[3]) ? buf[3] : '.',
-	      qemu_isprint(buf[4]) ? buf[4] : '.',
-	      qemu_isprint(buf[5]) ? buf[5] : '.',
-	      qemu_isprint(buf[6]) ? buf[6] : '.',
-	      qemu_isprint(buf[7]) ? buf[7] : '.');
-
-	if (memcmp(buf, "NBDMAGIC", 8) != 0) {
-		LOG("Invalid magic received");
-		errno = EINVAL;
-		return -1;
-	}
-
-	if (read_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
-		LOG("read failed");
-		errno = EINVAL;
-		return -1;
-	}
-	magic = be64_to_cpu(magic);
-	TRACE("Magic is 0x%" PRIx64, magic);
-
-	if (name) {
-		uint32_t reserved = 0;
-		uint32_t opt;
-		uint32_t namesize;
-
-		TRACE("Checking magic (opts_magic)");
-		if (magic != 0x49484156454F5054LL) {
-			LOG("Bad magic received");
-			errno = EINVAL;
-			return -1;
-		}
-		if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
-			LOG("flags read failed");
-			errno = EINVAL;
-			return -1;
-		}
-		*flags = be16_to_cpu(tmp) << 16;
-		/* reserved for future use */
-		if (write_sync(csock, &reserved, sizeof(reserved)) !=
-		    sizeof(reserved)) {
-			LOG("write failed (reserved)");
-			errno = EINVAL;
-			return -1;
-		}
-		/* write the export name */
-		magic = cpu_to_be64(magic);
-		if (write_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
-			LOG("write failed (magic)");
-			errno = EINVAL;
-			return -1;
-		}
-		opt = cpu_to_be32(NBD_OPT_EXPORT_NAME);
-		if (write_sync(csock, &opt, sizeof(opt)) != sizeof(opt)) {
-			LOG("write failed (opt)");
-			errno = EINVAL;
-			return -1;
-		}
-		namesize = cpu_to_be32(strlen(name));
-		if (write_sync(csock, &namesize, sizeof(namesize)) !=
-		    sizeof(namesize)) {
-			LOG("write failed (namesize)");
-			errno = EINVAL;
-			return -1;
-		}
-		if (write_sync(csock, (char*)name, strlen(name)) != strlen(name)) {
-			LOG("write failed (name)");
-			errno = EINVAL;
-			return -1;
-		}
-	} else {
-		TRACE("Checking magic (cli_magic)");
-
-		if (magic != 0x00420281861253LL) {
-			LOG("Bad magic received");
-			errno = EINVAL;
-			return -1;
-		}
-	}
-
-	if (read_sync(csock, &s, sizeof(s)) != sizeof(s)) {
-		LOG("read failed");
-		errno = EINVAL;
-		return -1;
-	}
-	*size = be64_to_cpu(s);
-	*blocksize = 1024;
-	TRACE("Size is %" PRIu64, *size);
-
-	if (!name) {
-		if (read_sync(csock, flags, sizeof(*flags)) != sizeof(*flags)) {
-			LOG("read failed (flags)");
-			errno = EINVAL;
-			return -1;
-		}
-		*flags = be32_to_cpup(flags);
-	} else {
-		if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
-			LOG("read failed (tmp)");
-			errno = EINVAL;
-			return -1;
-		}
-		*flags |= be32_to_cpu(tmp);
-	}
-	if (read_sync(csock, &buf, 124) != 124) {
-		LOG("read failed (buf)");
-		errno = EINVAL;
-		return -1;
-	}
+    char buf[256];
+    uint64_t magic, s;
+    uint16_t tmp;
+
+    TRACE("Receiving negotation.");
+
+    if (read_sync(csock, buf, 8) != 8) {
+        LOG("read failed");
+        errno = EINVAL;
+        return -1;
+    }
+
+    buf[8] = '\0';
+    if (strlen(buf) == 0) {
+        LOG("server connection closed");
+        errno = EINVAL;
+        return -1;
+    }
+
+    TRACE("Magic is %c%c%c%c%c%c%c%c",
+          qemu_isprint(buf[0]) ? buf[0] : '.',
+          qemu_isprint(buf[1]) ? buf[1] : '.',
+          qemu_isprint(buf[2]) ? buf[2] : '.',
+          qemu_isprint(buf[3]) ? buf[3] : '.',
+          qemu_isprint(buf[4]) ? buf[4] : '.',
+          qemu_isprint(buf[5]) ? buf[5] : '.',
+          qemu_isprint(buf[6]) ? buf[6] : '.',
+          qemu_isprint(buf[7]) ? buf[7] : '.');
+
+    if (memcmp(buf, "NBDMAGIC", 8) != 0) {
+        LOG("Invalid magic received");
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (read_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
+        LOG("read failed");
+        errno = EINVAL;
+        return -1;
+    }
+    magic = be64_to_cpu(magic);
+    TRACE("Magic is 0x%" PRIx64, magic);
+
+    if (name) {
+        uint32_t reserved = 0;
+        uint32_t opt;
+        uint32_t namesize;
+
+        TRACE("Checking magic (opts_magic)");
+        if (magic != 0x49484156454F5054LL) {
+            LOG("Bad magic received");
+            errno = EINVAL;
+            return -1;
+        }
+        if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
+            LOG("flags read failed");
+            errno = EINVAL;
+            return -1;
+        }
+        *flags = be16_to_cpu(tmp) << 16;
+        /* reserved for future use */
+        if (write_sync(csock, &reserved, sizeof(reserved)) !=
+            sizeof(reserved)) {
+            LOG("write failed (reserved)");
+            errno = EINVAL;
+            return -1;
+        }
+        /* write the export name */
+        magic = cpu_to_be64(magic);
+        if (write_sync(csock, &magic, sizeof(magic)) != sizeof(magic)) {
+            LOG("write failed (magic)");
+            errno = EINVAL;
+            return -1;
+        }
+        opt = cpu_to_be32(NBD_OPT_EXPORT_NAME);
+        if (write_sync(csock, &opt, sizeof(opt)) != sizeof(opt)) {
+            LOG("write failed (opt)");
+            errno = EINVAL;
+            return -1;
+        }
+        namesize = cpu_to_be32(strlen(name));
+        if (write_sync(csock, &namesize, sizeof(namesize)) !=
+            sizeof(namesize)) {
+            LOG("write failed (namesize)");
+            errno = EINVAL;
+            return -1;
+        }
+        if (write_sync(csock, (char*)name, strlen(name)) != strlen(name)) {
+            LOG("write failed (name)");
+            errno = EINVAL;
+            return -1;
+        }
+    } else {
+        TRACE("Checking magic (cli_magic)");
+
+        if (magic != 0x00420281861253LL) {
+            LOG("Bad magic received");
+            errno = EINVAL;
+            return -1;
+        }
+    }
+
+    if (read_sync(csock, &s, sizeof(s)) != sizeof(s)) {
+        LOG("read failed");
+        errno = EINVAL;
+        return -1;
+    }
+    *size = be64_to_cpu(s);
+    *blocksize = 1024;
+    TRACE("Size is %" PRIu64, *size);
+
+    if (!name) {
+        if (read_sync(csock, flags, sizeof(*flags)) != sizeof(*flags)) {
+            LOG("read failed (flags)");
+            errno = EINVAL;
+            return -1;
+        }
+        *flags = be32_to_cpup(flags);
+    } else {
+        if (read_sync(csock, &tmp, sizeof(tmp)) != sizeof(tmp)) {
+            LOG("read failed (tmp)");
+            errno = EINVAL;
+            return -1;
+        }
+        *flags |= be32_to_cpu(tmp);
+    }
+    if (read_sync(csock, &buf, 124) != 124) {
+        LOG("read failed (buf)");
+        errno = EINVAL;
+        return -1;
+    }
         return 0;
 }
 
 #ifndef _WIN32
 int nbd_init(int fd, int csock, off_t size, size_t blocksize)
 {
-	TRACE("Setting block size to %lu", (unsigned long)blocksize);
+    TRACE("Setting block size to %lu", (unsigned long)blocksize);
 
-	if (ioctl(fd, NBD_SET_BLKSIZE, blocksize) == -1) {
-		int serrno = errno;
-		LOG("Failed setting NBD block size");
-		errno = serrno;
-		return -1;
-	}
+    if (ioctl(fd, NBD_SET_BLKSIZE, blocksize) == -1) {
+        int serrno = errno;
+        LOG("Failed setting NBD block size");
+        errno = serrno;
+        return -1;
+    }
 
         TRACE("Setting size to %zd block(s)", (size_t)(size / blocksize));
 
-	if (ioctl(fd, NBD_SET_SIZE_BLOCKS, size / blocksize) == -1) {
-		int serrno = errno;
-		LOG("Failed setting size (in blocks)");
-		errno = serrno;
-		return -1;
-	}
+    if (ioctl(fd, NBD_SET_SIZE_BLOCKS, size / blocksize) == -1) {
+        int serrno = errno;
+        LOG("Failed setting size (in blocks)");
+        errno = serrno;
+        return -1;
+    }
 
-	TRACE("Clearing NBD socket");
+    TRACE("Clearing NBD socket");
 
-	if (ioctl(fd, NBD_CLEAR_SOCK) == -1) {
-		int serrno = errno;
-		LOG("Failed clearing NBD socket");
-		errno = serrno;
-		return -1;
-	}
+    if (ioctl(fd, NBD_CLEAR_SOCK) == -1) {
+        int serrno = errno;
+        LOG("Failed clearing NBD socket");
+        errno = serrno;
+        return -1;
+    }
 
-	TRACE("Setting NBD socket");
+    TRACE("Setting NBD socket");
 
-	if (ioctl(fd, NBD_SET_SOCK, csock) == -1) {
-		int serrno = errno;
-		LOG("Failed to set NBD socket");
-		errno = serrno;
-		return -1;
-	}
+    if (ioctl(fd, NBD_SET_SOCK, csock) == -1) {
+        int serrno = errno;
+        LOG("Failed to set NBD socket");
+        errno = serrno;
+        return -1;
+    }
 
-	TRACE("Negotiation ended");
+    TRACE("Negotiation ended");
 
-	return 0;
+    return 0;
 }
 
 int nbd_disconnect(int fd)
 {
-	ioctl(fd, NBD_CLEAR_QUE);
-	ioctl(fd, NBD_DISCONNECT);
-	ioctl(fd, NBD_CLEAR_SOCK);
-	return 0;
+    ioctl(fd, NBD_CLEAR_QUE);
+    ioctl(fd, NBD_DISCONNECT);
+    ioctl(fd, NBD_CLEAR_SOCK);
+    return 0;
 }
 
 int nbd_client(int fd)
 {
-	int ret;
-	int serrno;
+    int ret;
+    int serrno;
 
-	TRACE("Doing NBD loop");
+    TRACE("Doing NBD loop");
 
-	ret = ioctl(fd, NBD_DO_IT);
-	serrno = errno;
+    ret = ioctl(fd, NBD_DO_IT);
+    serrno = errno;
 
-	TRACE("NBD loop returned %d: %s", ret, strerror(serrno));
+    TRACE("NBD loop returned %d: %s", ret, strerror(serrno));
 
-	TRACE("Clearing NBD queue");
-	ioctl(fd, NBD_CLEAR_QUE);
+    TRACE("Clearing NBD queue");
+    ioctl(fd, NBD_CLEAR_QUE);
 
-	TRACE("Clearing NBD socket");
-	ioctl(fd, NBD_CLEAR_SOCK);
+    TRACE("Clearing NBD socket");
+    ioctl(fd, NBD_CLEAR_SOCK);
 
-	errno = serrno;
-	return ret;
+    errno = serrno;
+    return ret;
 }
 #else
 int nbd_init(int fd, int csock, off_t size, size_t blocksize)
@@ -531,235 +431,236 @@ int nbd_client(int fd)
 
 int nbd_send_request(int csock, struct nbd_request *request)
 {
-	uint8_t buf[4 + 4 + 8 + 8 + 4];
-
-	cpu_to_be32w((uint32_t*)buf, NBD_REQUEST_MAGIC);
-	cpu_to_be32w((uint32_t*)(buf + 4), request->type);
-	cpu_to_be64w((uint64_t*)(buf + 8), request->handle);
-	cpu_to_be64w((uint64_t*)(buf + 16), request->from);
-	cpu_to_be32w((uint32_t*)(buf + 24), request->len);
-
-	TRACE("Sending request to client");
-
-	if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
-		LOG("writing to socket failed");
-		errno = EINVAL;
-		return -1;
-	}
-	return 0;
-}
+    uint8_t buf[4 + 4 + 8 + 8 + 4];
 
+    cpu_to_be32w((uint32_t*)buf, NBD_REQUEST_MAGIC);
+    cpu_to_be32w((uint32_t*)(buf + 4), request->type);
+    cpu_to_be64w((uint64_t*)(buf + 8), request->handle);
+    cpu_to_be64w((uint64_t*)(buf + 16), request->from);
+    cpu_to_be32w((uint32_t*)(buf + 24), request->len);
+
+    TRACE("Sending request to client: "
+          "{ .from = %" PRIu64", .len = %u, .handle = %" PRIu64", .type=%i}",
+          request->from, request->len, request->handle, request->type);
+
+    if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
+        LOG("writing to socket failed");
+        errno = EINVAL;
+        return -1;
+    }
+    return 0;
+}
 
 static int nbd_receive_request(int csock, struct nbd_request *request)
 {
-	uint8_t buf[4 + 4 + 8 + 8 + 4];
-	uint32_t magic;
-
-	if (read_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
-		LOG("read failed");
-		errno = EINVAL;
-		return -1;
-	}
-
-	/* Request
-	   [ 0 ..  3]   magic   (NBD_REQUEST_MAGIC)
-	   [ 4 ..  7]   type    (0 == READ, 1 == WRITE)
-	   [ 8 .. 15]   handle
-	   [16 .. 23]   from
-	   [24 .. 27]   len
-	 */
-
-	magic = be32_to_cpup((uint32_t*)buf);
-	request->type  = be32_to_cpup((uint32_t*)(buf + 4));
-	request->handle = be64_to_cpup((uint64_t*)(buf + 8));
-	request->from  = be64_to_cpup((uint64_t*)(buf + 16));
-	request->len   = be32_to_cpup((uint32_t*)(buf + 24));
-
-	TRACE("Got request: "
-	      "{ magic = 0x%x, .type = %d, from = %" PRIu64" , len = %u }",
-	      magic, request->type, request->from, request->len);
-
-	if (magic != NBD_REQUEST_MAGIC) {
-		LOG("invalid magic (got 0x%x)", magic);
-		errno = EINVAL;
-		return -1;
-	}
-	return 0;
+    uint8_t buf[4 + 4 + 8 + 8 + 4];
+    uint32_t magic;
+
+    if (read_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
+        LOG("read failed");
+        errno = EINVAL;
+        return -1;
+    }
+
+    /* Request
+       [ 0 ..  3]   magic   (NBD_REQUEST_MAGIC)
+       [ 4 ..  7]   type    (0 == READ, 1 == WRITE)
+       [ 8 .. 15]   handle
+       [16 .. 23]   from
+       [24 .. 27]   len
+     */
+
+    magic = be32_to_cpup((uint32_t*)buf);
+    request->type  = be32_to_cpup((uint32_t*)(buf + 4));
+    request->handle = be64_to_cpup((uint64_t*)(buf + 8));
+    request->from  = be64_to_cpup((uint64_t*)(buf + 16));
+    request->len   = be32_to_cpup((uint32_t*)(buf + 24));
+
+    TRACE("Got request: "
+          "{ magic = 0x%x, .type = %d, from = %" PRIu64" , len = %u }",
+          magic, request->type, request->from, request->len);
+
+    if (magic != NBD_REQUEST_MAGIC) {
+        LOG("invalid magic (got 0x%x)", magic);
+        errno = EINVAL;
+        return -1;
+    }
+    return 0;
 }
 
 int nbd_receive_reply(int csock, struct nbd_reply *reply)
 {
-	uint8_t buf[NBD_REPLY_SIZE];
-	uint32_t magic;
-
-	memset(buf, 0xAA, sizeof(buf));
-
-	if (read_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
-		LOG("read failed");
-		errno = EINVAL;
-		return -1;
-	}
-
-	/* Reply
-	   [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
-	   [ 4 ..  7]    error   (0 == no error)
-	   [ 7 .. 15]    handle
-	 */
-
-	magic = be32_to_cpup((uint32_t*)buf);
-	reply->error  = be32_to_cpup((uint32_t*)(buf + 4));
-	reply->handle = be64_to_cpup((uint64_t*)(buf + 8));
-
-	TRACE("Got reply: "
-	      "{ magic = 0x%x, .error = %d, handle = %" PRIu64" }",
-	      magic, reply->error, reply->handle);
-
-	if (magic != NBD_REPLY_MAGIC) {
-		LOG("invalid magic (got 0x%x)", magic);
-		errno = EINVAL;
-		return -1;
-	}
-	return 0;
+    uint8_t buf[NBD_REPLY_SIZE];
+    uint32_t magic;
+
+    memset(buf, 0xAA, sizeof(buf));
+
+    if (read_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
+        LOG("read failed");
+        errno = EINVAL;
+        return -1;
+    }
+
+    /* Reply
+       [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
+       [ 4 ..  7]    error   (0 == no error)
+       [ 7 .. 15]    handle
+     */
+
+    magic = be32_to_cpup((uint32_t*)buf);
+    reply->error  = be32_to_cpup((uint32_t*)(buf + 4));
+    reply->handle = be64_to_cpup((uint64_t*)(buf + 8));
+
+    TRACE("Got reply: "
+          "{ magic = 0x%x, .error = %d, handle = %" PRIu64" }",
+          magic, reply->error, reply->handle);
+
+    if (magic != NBD_REPLY_MAGIC) {
+        LOG("invalid magic (got 0x%x)", magic);
+        errno = EINVAL;
+        return -1;
+    }
+    return 0;
 }
 
 static int nbd_send_reply(int csock, struct nbd_reply *reply)
 {
-	uint8_t buf[4 + 4 + 8];
-
-	/* Reply
-	   [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
-	   [ 4 ..  7]    error   (0 == no error)
-	   [ 7 .. 15]    handle
-	 */
-	cpu_to_be32w((uint32_t*)buf, NBD_REPLY_MAGIC);
-	cpu_to_be32w((uint32_t*)(buf + 4), reply->error);
-	cpu_to_be64w((uint64_t*)(buf + 8), reply->handle);
-
-	TRACE("Sending response to client");
-
-	if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
-		LOG("writing to socket failed");
-		errno = EINVAL;
-		return -1;
-	}
-	return 0;
+    uint8_t buf[4 + 4 + 8];
+
+    /* Reply
+       [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
+       [ 4 ..  7]    error   (0 == no error)
+       [ 7 .. 15]    handle
+     */
+    cpu_to_be32w((uint32_t*)buf, NBD_REPLY_MAGIC);
+    cpu_to_be32w((uint32_t*)(buf + 4), reply->error);
+    cpu_to_be64w((uint64_t*)(buf + 8), reply->handle);
+
+    TRACE("Sending response to client");
+
+    if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
+        LOG("writing to socket failed");
+        errno = EINVAL;
+        return -1;
+    }
+    return 0;
 }
 
 int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
              off_t *offset, bool readonly, uint8_t *data, int data_size)
 {
-	struct nbd_request request;
-	struct nbd_reply reply;
-
-	TRACE("Reading request.");
-
-	if (nbd_receive_request(csock, &request) == -1)
-		return -1;
-
-	if (request.len + NBD_REPLY_SIZE > data_size) {
-		LOG("len (%u) is larger than max len (%u)",
-		    request.len + NBD_REPLY_SIZE, data_size);
-		errno = EINVAL;
-		return -1;
-	}
-
-	if ((request.from + request.len) < request.from) {
-		LOG("integer overflow detected! "
-		    "you're probably being attacked");
-		errno = EINVAL;
-		return -1;
-	}
-
-	if ((request.from + request.len) > size) {
-	        LOG("From: %" PRIu64 ", Len: %u, Size: %" PRIu64
-		    ", Offset: %" PRIu64 "\n",
+    struct nbd_request request;
+    struct nbd_reply reply;
+
+    TRACE("Reading request.");
+
+    if (nbd_receive_request(csock, &request) == -1)
+        return -1;
+
+    if (request.len + NBD_REPLY_SIZE > data_size) {
+        LOG("len (%u) is larger than max len (%u)",
+            request.len + NBD_REPLY_SIZE, data_size);
+        errno = EINVAL;
+        return -1;
+    }
+
+    if ((request.from + request.len) < request.from) {
+        LOG("integer overflow detected! "
+            "you're probably being attacked");
+        errno = EINVAL;
+        return -1;
+    }
+
+    if ((request.from + request.len) > size) {
+            LOG("From: %" PRIu64 ", Len: %u, Size: %" PRIu64
+            ", Offset: %" PRIu64 "\n",
                     request.from, request.len, (uint64_t)size, dev_offset);
-		LOG("requested operation past EOF--bad client?");
-		errno = EINVAL;
-		return -1;
-	}
-
-	TRACE("Decoding type");
-
-	reply.handle = request.handle;
-	reply.error = 0;
-
-	switch (request.type) {
-	case NBD_CMD_READ:
-		TRACE("Request type is READ");
-
-		if (bdrv_read(bs, (request.from + dev_offset) / 512,
-			      data + NBD_REPLY_SIZE,
-			      request.len / 512) == -1) {
-			LOG("reading from file failed");
-			errno = EINVAL;
-			return -1;
-		}
-		*offset += request.len;
-
-		TRACE("Read %u byte(s)", request.len);
-
-		/* Reply
-		   [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
-		   [ 4 ..  7]    error   (0 == no error)
-		   [ 7 .. 15]    handle
-		 */
-
-		cpu_to_be32w((uint32_t*)data, NBD_REPLY_MAGIC);
-		cpu_to_be32w((uint32_t*)(data + 4), reply.error);
-		cpu_to_be64w((uint64_t*)(data + 8), reply.handle);
-
-		TRACE("Sending data to client");
-
-		if (write_sync(csock, data,
-			       request.len + NBD_REPLY_SIZE) !=
-			       request.len + NBD_REPLY_SIZE) {
-			LOG("writing to socket failed");
-			errno = EINVAL;
-			return -1;
-		}
-		break;
-	case NBD_CMD_WRITE:
-		TRACE("Request type is WRITE");
-
-		TRACE("Reading %u byte(s)", request.len);
-
-		if (read_sync(csock, data, request.len) != request.len) {
-			LOG("reading from socket failed");
-			errno = EINVAL;
-			return -1;
-		}
-
-		if (readonly) {
-			TRACE("Server is read-only, return error");
-			reply.error = 1;
-		} else {
-			TRACE("Writing to device");
-
-			if (bdrv_write(bs, (request.from + dev_offset) / 512,
-				       data, request.len / 512) == -1) {
-				LOG("writing to file failed");
-				errno = EINVAL;
-				return -1;
-			}
-
-			*offset += request.len;
-		}
-
-		if (nbd_send_reply(csock, &reply) == -1)
-			return -1;
-		break;
-	case NBD_CMD_DISC:
-		TRACE("Request type is DISCONNECT");
-		errno = 0;
-		return 1;
-	default:
-		LOG("invalid request type (%u) received", request.type);
-		errno = EINVAL;
-		return -1;
-	}
-
-	TRACE("Request/Reply complete");
-
-	return 0;
+        LOG("requested operation past EOF--bad client?");
+        errno = EINVAL;
+        return -1;
+    }
+
+    TRACE("Decoding type");
+
+    reply.handle = request.handle;
+    reply.error = 0;
+
+    switch (request.type) {
+    case NBD_CMD_READ:
+        TRACE("Request type is READ");
+
+        if (bdrv_read(bs, (request.from + dev_offset) / 512,
+                  data + NBD_REPLY_SIZE,
+                  request.len / 512) == -1) {
+            LOG("reading from file failed");
+            errno = EINVAL;
+            return -1;
+        }
+        *offset += request.len;
+
+        TRACE("Read %u byte(s)", request.len);
+
+        /* Reply
+           [ 0 ..  3]    magic   (NBD_REPLY_MAGIC)
+           [ 4 ..  7]    error   (0 == no error)
+           [ 7 .. 15]    handle
+         */
+
+        cpu_to_be32w((uint32_t*)data, NBD_REPLY_MAGIC);
+        cpu_to_be32w((uint32_t*)(data + 4), reply.error);
+        cpu_to_be64w((uint64_t*)(data + 8), reply.handle);
+
+        TRACE("Sending data to client");
+
+        if (write_sync(csock, data,
+                   request.len + NBD_REPLY_SIZE) !=
+                   request.len + NBD_REPLY_SIZE) {
+            LOG("writing to socket failed");
+            errno = EINVAL;
+            return -1;
+        }
+        break;
+    case NBD_CMD_WRITE:
+        TRACE("Request type is WRITE");
+
+        TRACE("Reading %u byte(s)", request.len);
+
+        if (read_sync(csock, data, request.len) != request.len) {
+            LOG("reading from socket failed");
+            errno = EINVAL;
+            return -1;
+        }
+
+        if (readonly) {
+            TRACE("Server is read-only, return error");
+            reply.error = 1;
+        } else {
+            TRACE("Writing to device");
+
+            if (bdrv_write(bs, (request.from + dev_offset) / 512,
+                       data, request.len / 512) == -1) {
+                LOG("writing to file failed");
+                errno = EINVAL;
+                return -1;
+            }
+
+            *offset += request.len;
+        }
+
+        if (nbd_send_reply(csock, &reply) == -1)
+            return -1;
+        break;
+    case NBD_CMD_DISC:
+        TRACE("Request type is DISCONNECT");
+        errno = 0;
+        return 1;
+    default:
+        LOG("invalid request type (%u) received", request.type);
+        errno = EINVAL;
+        return -1;
+    }
+
+    TRACE("Request/Reply complete");
+
+    return 0;
 }
diff --git a/nbd.h b/nbd.h
index fc3a594..b38d0d0 100644
--- a/nbd.h
+++ b/nbd.h
@@ -22,19 +22,22 @@
 #include <sys/types.h>
 
 #include <qemu-common.h>
+
 #include "block_int.h"
 
 struct nbd_request {
+    uint32_t magic;
     uint32_t type;
     uint64_t handle;
     uint64_t from;
     uint32_t len;
-};
+} __attribute__ ((__packed__));
 
 struct nbd_reply {
+    uint32_t magic;
     uint32_t error;
     uint64_t handle;
-};
+} __attribute__ ((__packed__));
 
 enum {
     NBD_CMD_READ = 0,
@@ -47,6 +50,8 @@ enum {
 size_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
 int tcp_socket_outgoing(const char *address, uint16_t port);
 int tcp_socket_incoming(const char *address, uint16_t port);
+int tcp_socket_outgoing_spec(const char *address_and_port);
+int tcp_socket_incoming_spec(const char *address_and_port);
 int unix_socket_outgoing(const char *path);
 int unix_socket_incoming(const char *path);
 
diff --git a/qemu-common.h b/qemu-common.h
index 8ecb488..82e27c1 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -334,6 +334,10 @@ void qemu_iovec_memset(QEMUIOVector *qiov, int c, size_t count);
 void qemu_iovec_memset_skip(QEMUIOVector *qiov, int c, size_t count,
                             size_t skip);
 
+void qemu_progress_init(int enabled, float min_skip);
+void qemu_progress_end(void);
+void qemu_progress_print(float percent, int max);
+
 /* Convert a byte between binary and BCD.  */
 static inline uint8_t to_bcd(uint8_t val)
 {
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 6c7176f..3072d38 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -28,7 +28,7 @@ STEXI
 ETEXI
 
 DEF("convert", img_convert,
-    "convert [-c] [-f fmt] [-O output_fmt] [-o options] [-s snapshot_name] filename [filename2 [...]] output_filename")
+    "convert [-c] [-p] [-f fmt] [-O output_fmt] [-o options] [-s snapshot_name] filename [filename2 [...]] output_filename")
 STEXI
 @item convert [-c] [-f @var{fmt}] [-O @var{output_fmt}] [-o @var{options}] [-s @var{snapshot_name}] @var{filename} [@var{filename2} [...]] @var{output_filename}
 ETEXI
@@ -46,7 +46,7 @@ STEXI
 ETEXI
 
 DEF("rebase", img_rebase,
-    "rebase [-f fmt] [-u] -b backing_file [-F backing_fmt] filename")
+    "rebase [-f fmt] [-p] [-u] -b backing_file [-F backing_fmt] filename")
 STEXI
 @item rebase [-f @var{fmt}] [-u] -b @var{backing_file} [-F @var{backing_fmt}] @var{filename}
 ETEXI
diff --git a/qemu-img.c b/qemu-img.c
index 7e3cc4c..d9c2c12 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -77,6 +77,7 @@ static void help(void)
            "       match exactly. The image doesn't need a working backing file before\n"
            "       rebasing in this case (useful for renaming the backing file)\n"
            "  '-h' with or without a command shows this help and lists the supported formats\n"
+           "  '-p' show progress of command (only certain commands)\n"
            "\n"
            "Parameters to snapshot subcommand:\n"
            "  'snapshot' is the name of the snapshot to create, apply or delete\n"
@@ -567,6 +568,7 @@ static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n,
 static int img_convert(int argc, char **argv)
 {
     int c, ret = 0, n, n1, bs_n, bs_i, compress, cluster_size, cluster_sectors;
+    int progress = 0;
     const char *fmt, *out_fmt, *out_baseimg, *out_filename;
     BlockDriver *drv, *proto_drv;
     BlockDriverState **bs = NULL, *out_bs = NULL;
@@ -579,13 +581,14 @@ static int img_convert(int argc, char **argv)
     QEMUOptionParameter *out_baseimg_param;
     char *options = NULL;
     const char *snapshot_name = NULL;
+    float local_progress;
 
     fmt = NULL;
     out_fmt = "raw";
     out_baseimg = NULL;
     compress = 0;
     for(;;) {
-        c = getopt(argc, argv, "f:O:B:s:hce6o:");
+        c = getopt(argc, argv, "f:O:B:s:hce6o:p");
         if (c == -1) {
             break;
         }
@@ -620,6 +623,9 @@ static int img_convert(int argc, char **argv)
         case 's':
             snapshot_name = optarg;
             break;
+        case 'p':
+            progress = 1;
+            break;
         }
     }
 
@@ -642,6 +648,9 @@ static int img_convert(int argc, char **argv)
         goto out;
     }
         
+    qemu_progress_init(progress, 2.0);
+    qemu_progress_print(0, 100);
+
     bs = qemu_mallocz(bs_n * sizeof(BlockDriverState *));
 
     total_sectors = 0;
@@ -773,6 +782,11 @@ static int img_convert(int argc, char **argv)
         }
         cluster_sectors = cluster_size >> 9;
         sector_num = 0;
+
+        nb_sectors = total_sectors;
+        local_progress = (float)100 /
+            (nb_sectors / MIN(nb_sectors, (cluster_sectors)));
+
         for(;;) {
             int64_t bs_num;
             int remainder;
@@ -832,6 +846,7 @@ static int img_convert(int argc, char **argv)
                 }
             }
             sector_num += n;
+            qemu_progress_print(local_progress, 100);
         }
         /* signal EOF to align */
         bdrv_write_compressed(out_bs, 0, NULL, 0);
@@ -839,6 +854,10 @@ static int img_convert(int argc, char **argv)
         int has_zero_init = bdrv_has_zero_init(out_bs);
 
         sector_num = 0; // total number of sectors converted so far
+        nb_sectors = total_sectors - sector_num;
+        local_progress = (float)100 /
+            (nb_sectors / MIN(nb_sectors, (IO_BUF_SIZE / 512)));
+
         for(;;) {
             nb_sectors = total_sectors - sector_num;
             if (nb_sectors <= 0) {
@@ -912,9 +931,11 @@ static int img_convert(int argc, char **argv)
                 n -= n1;
                 buf1 += n1 * 512;
             }
+            qemu_progress_print(local_progress, 100);
         }
     }
 out:
+    qemu_progress_end();
     free_option_parameters(create_options);
     free_option_parameters(param);
     qemu_free(buf);
@@ -1184,6 +1205,7 @@ static int img_rebase(int argc, char **argv)
     const char *fmt, *out_basefmt, *out_baseimg;
     int c, flags, ret;
     int unsafe = 0;
+    int progress = 0;
 
     /* Parse commandline parameters */
     fmt = NULL;
@@ -1191,7 +1213,7 @@ static int img_rebase(int argc, char **argv)
     out_basefmt = NULL;
 
     for(;;) {
-        c = getopt(argc, argv, "uhf:F:b:");
+        c = getopt(argc, argv, "uhf:F:b:p");
         if (c == -1) {
             break;
         }
@@ -1212,6 +1234,9 @@ static int img_rebase(int argc, char **argv)
         case 'u':
             unsafe = 1;
             break;
+        case 'p':
+            progress = 1;
+            break;
         }
     }
 
@@ -1220,6 +1245,9 @@ static int img_rebase(int argc, char **argv)
     }
     filename = argv[optind++];
 
+    qemu_progress_init(progress, 2.0);
+    qemu_progress_print(0, 100);
+
     /*
      * Open the images.
      *
@@ -1295,12 +1323,15 @@ static int img_rebase(int argc, char **argv)
         int n;
         uint8_t * buf_old;
         uint8_t * buf_new;
+        float local_progress;
 
         buf_old = qemu_malloc(IO_BUF_SIZE);
         buf_new = qemu_malloc(IO_BUF_SIZE);
 
         bdrv_get_geometry(bs, &num_sectors);
 
+        local_progress = (float)100 /
+            (num_sectors / MIN(num_sectors, (IO_BUF_SIZE / 512)));
         for (sector = 0; sector < num_sectors; sector += n) {
 
             /* How many sectors can we handle with the next read? */
@@ -1348,6 +1379,7 @@ static int img_rebase(int argc, char **argv)
 
                 written += pnum;
             }
+            qemu_progress_print(local_progress, 100);
         }
 
         qemu_free(buf_old);
@@ -1368,6 +1400,7 @@ static int img_rebase(int argc, char **argv)
             out_baseimg, strerror(-ret));
     }
 
+    qemu_progress_print(100, 0);
     /*
      * TODO At this point it is possible to check if any clusters that are
      * allocated in the COW file are the same in the backing file. If so, they
@@ -1375,10 +1408,15 @@ static int img_rebase(int argc, char **argv)
      * backing file, in case of a crash this would lead to corruption.
      */
 out:
+    qemu_progress_end();
     /* Cleanup */
     if (!unsafe) {
-        bdrv_delete(bs_old_backing);
-        bdrv_delete(bs_new_backing);
+        if (bs_old_backing != NULL) {
+            bdrv_delete(bs_old_backing);
+        }
+        if (bs_new_backing != NULL) {
+            bdrv_delete(bs_new_backing);
+        }
     }
 
     bdrv_delete(bs);
diff --git a/qemu-progress.c b/qemu-progress.c
new file mode 100644
index 0000000..656e065
--- /dev/null
+++ b/qemu-progress.c
@@ -0,0 +1,89 @@
+/*
+ * QEMU progress printing utility functions
+ *
+ * Copyright (C) 2011 Jes Sorensen <Jes.Sorensen@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu-common.h"
+#include "osdep.h"
+#include "sysemu.h"
+#include <stdio.h>
+
+struct progress_state {
+    int enabled;
+    float current;
+    float last_print;
+    float min_skip;
+};
+
+static struct progress_state state;
+
+/*
+ * Simple progress print function.
+ * @percent relative percent of current operation
+ * @max percent of total operation
+ */
+static void progress_simple_print(void)
+{
+    if (state.enabled) {
+        printf("    (%3.2f/100%%)\r", state.current);
+        fflush(stdout);
+    }
+}
+
+static void progress_simple_end(void)
+{
+    if (state.enabled) {
+        printf("\n");
+    }
+}
+
+void qemu_progress_init(int enabled, float min_skip)
+{
+    state.enabled = enabled;
+    state.min_skip = min_skip;
+}
+
+void qemu_progress_end(void)
+{
+    progress_simple_end();
+}
+
+void qemu_progress_print(float percent, int max)
+{
+    float current;
+
+    if (max == 0) {
+        current = percent;
+    } else {
+        current = state.current + percent / 100 * max;
+    }
+    if (current > 100) {
+        current = 100;
+    }
+    state.current = current;
+
+    if (current > (state.last_print + state.min_skip) ||
+        (current == 100) || (current == 0)) {
+        state.last_print = state.current;
+        progress_simple_print();
+    }
+}
diff --git a/qemu-sockets.c b/qemu-sockets.c
index c526324..eda1850 100644
--- a/qemu-sockets.c
+++ b/qemu-sockets.c
@@ -627,24 +627,28 @@ int unix_connect(const char *path)
 int unix_listen_opts(QemuOpts *opts)
 {
     fprintf(stderr, "unix sockets are not available on windows\n");
+    errno = ENOTSUP;
     return -1;
 }
 
 int unix_connect_opts(QemuOpts *opts)
 {
     fprintf(stderr, "unix sockets are not available on windows\n");
+    errno = ENOTSUP;
     return -1;
 }
 
 int unix_listen(const char *path, char *ostr, int olen)
 {
     fprintf(stderr, "unix sockets are not available on windows\n");
+    errno = ENOTSUP;
     return -1;
 }
 
 int unix_connect(const char *path)
 {
     fprintf(stderr, "unix sockets are not available on windows\n");
+    errno = ENOTSUP;
     return -1;
 }
 
diff --git a/trace-events b/trace-events
index 06efdb7..703b745 100644
--- a/trace-events
+++ b/trace-events
@@ -54,6 +54,7 @@ disable bdrv_aio_multiwrite_latefail(void *mcb, int i) "mcb %p i %d"
 disable bdrv_aio_flush(void *bs, void *opaque) "bs %p opaque %p"
 disable bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
 disable bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
+disable bdrv_set_locked(void *bs, int locked) "bs %p locked %d"
 
 # hw/virtio-blk.c
 disable virtio_blk_req_complete(void *req, int status) "req %p status %d"
diff --git a/vl.c b/vl.c
index de232b7..68c3b53 100644
--- a/vl.c
+++ b/vl.c
@@ -2102,7 +2102,9 @@ int main(int argc, char **argv, char **envp)
                           HD_OPTS);
                 break;
             case QEMU_OPTION_drive:
-                drive_def(optarg);
+                if (drive_def(optarg) == NULL) {
+                    exit(1);
+                }
 	        break;
             case QEMU_OPTION_set:
                 if (qemu_set_option(optarg) != 0)