Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- file-posix: Fix read-only Linux block devices with auto-read-only
- Require aligned image size with O_DIRECT to avoid assertion failure
- Allow byte-aligned direct I/O on NFS instead of guessing 4k alignment
- Fix nbd_export_close_all() crash
- Fix race in iotests case 030
- qemu-img resize: Require --shrink for shrinking all image formats
- crypto: use a stronger private key for tests
- Remove VXHS block device
- MAINTAINERS: vvfat: set status to odd fixes

# gpg: Signature made Fri 17 Jul 2020 13:31:18 BST
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  file-posix: Fix leaked fd in raw_open_common() error path
  file-posix: Fix check_hdev_writable() with auto-read-only
  file-posix: Move check_hdev_writable() up
  file-posix: Allow byte-aligned O_DIRECT with NFS
  block: Require aligned image size to avoid assertion failure
  iotests: test shutdown when bitmap is exported through NBD
  nbd: make nbd_export_close_all() synchronous
  iotests/030: Reduce job speed to make race less likely
  crypto: use a stronger private key for tests
  qemu-img resize: Require --shrink for shrinking all image formats
  Remove VXHS block device
  vvfat: set status to odd fixes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 79 insertions, 649 deletions

diff --git a/block/Makefile.objs b/block/Makefile.objs
index 577e578bc2..19c6f371c9 100644
--- a/block/Makefile.objs
+++ b/block/Makefile.objs
@@ -31,7 +31,6 @@ block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
-block-obj-$(CONFIG_VXHS) += vxhs.o
 block-obj-$(CONFIG_LIBSSH) += ssh.o
 block-obj-y += accounting.o dirty-bitmap.o
 block-obj-y += write-threshold.o
@@ -61,7 +60,6 @@ rbd.o-cflags       := $(RBD_CFLAGS)
 rbd.o-libs         := $(RBD_LIBS)
 gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
-vxhs.o-libs        := $(VXHS_LIBS)
 ssh.o-cflags       := $(LIBSSH_CFLAGS)
 ssh.o-libs         := $(LIBSSH_LIBS)
 block-obj-dmg-bz2-$(CONFIG_BZIP2) += dmg-bz2.o
diff --git a/block/file-posix.c b/block/file-posix.c
index 8067e238cb..8cc39a1ef6 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -62,10 +62,12 @@
 #include <sys/ioctl.h>
 #include <sys/param.h>
 #include <sys/syscall.h>
+#include <sys/vfs.h>
 #include <linux/cdrom.h>
 #include <linux/fd.h>
 #include <linux/fs.h>
 #include <linux/hdreg.h>
+#include <linux/magic.h>
 #include <scsi/sg.h>
 #ifdef __s390__
 #include <asm/dasd.h>
@@ -300,6 +302,28 @@ static int probe_physical_blocksize(int fd, unsigned int *blk_size)
 #endif
 }
 
+/*
+ * Returns true if no alignment restrictions are necessary even for files
+ * opened with O_DIRECT.
+ *
+ * raw_probe_alignment() probes the required alignment and assume that 1 means
+ * the probing failed, so it falls back to a safe default of 4k. This can be
+ * avoided if we know that byte alignment is okay for the file.
+ */
+static bool dio_byte_aligned(int fd)
+{
+#ifdef __linux__
+    struct statfs buf;
+    int ret;
+
+    ret = fstatfs(fd, &buf);
+    if (ret == 0 && buf.f_type == NFS_SUPER_MAGIC) {
+        return true;
+    }
+#endif
+    return false;
+}
+
 /* Check if read is allowed with given memory buffer and length.
  *
  * This function is used to check O_DIRECT memory buffer and request alignment.
@@ -401,6 +425,39 @@ static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp)
     }
 }
 
+static int check_hdev_writable(int fd)
+{
+#if defined(BLKROGET)
+    /* Linux block devices can be configured "read-only" using blockdev(8).
+     * This is independent of device node permissions and therefore open(2)
+     * with O_RDWR succeeds.  Actual writes fail with EPERM.
+     *
+     * bdrv_open() is supposed to fail if the disk is read-only.  Explicitly
+     * check for read-only block devices so that Linux block devices behave
+     * properly.
+     */
+    struct stat st;
+    int readonly = 0;
+
+    if (fstat(fd, &st)) {
+        return -errno;
+    }
+
+    if (!S_ISBLK(st.st_mode)) {
+        return 0;
+    }
+
+    if (ioctl(fd, BLKROGET, &readonly) < 0) {
+        return -errno;
+    }
+
+    if (readonly) {
+        return -EACCES;
+    }
+#endif /* defined(BLKROGET) */
+    return 0;
+}
+
 static void raw_parse_flags(int bdrv_flags, int *open_flags, bool has_writers)
 {
     bool read_write = false;
@@ -585,6 +642,15 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
     }
     s->fd = fd;
 
+    /* Check s->open_flags rather than bdrv_flags due to auto-read-only */
+    if (s->open_flags & O_RDWR) {
+        ret = check_hdev_writable(s->fd);
+        if (ret < 0) {
+            error_setg_errno(errp, -ret, "The device is not writable");
+            goto fail;
+        }
+    }
+
     s->perm = 0;
     s->shared_perm = BLK_PERM_ALL;
 
@@ -629,7 +695,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
 
     s->has_discard = true;
     s->has_write_zeroes = true;
-    if ((bs->open_flags & BDRV_O_NOCACHE) != 0) {
+    if ((bs->open_flags & BDRV_O_NOCACHE) != 0 && !dio_byte_aligned(s->fd)) {
         s->needs_alignment = true;
     }
 
@@ -707,6 +773,9 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
     }
     ret = 0;
 fail:
+    if (ret < 0 && s->fd != -1) {
+        qemu_close(s->fd);
+    }
     if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
         unlink(filename);
     }
@@ -977,6 +1046,15 @@ static int raw_reconfigure_getfd(BlockDriverState *bs, int flags,
         }
     }
 
+    if (fd != -1 && (*open_flags & O_RDWR)) {
+        ret = check_hdev_writable(fd);
+        if (ret < 0) {
+            qemu_close(fd);
+            error_setg_errno(errp, -ret, "The device is not writable");
+            return -1;
+        }
+    }
+
     return fd;
 }
 
@@ -3299,39 +3377,6 @@ static int hdev_probe_device(const char *filename)
     return 0;
 }
 
-static int check_hdev_writable(BDRVRawState *s)
-{
-#if defined(BLKROGET)
-    /* Linux block devices can be configured "read-only" using blockdev(8).
-     * This is independent of device node permissions and therefore open(2)
-     * with O_RDWR succeeds.  Actual writes fail with EPERM.
-     *
-     * bdrv_open() is supposed to fail if the disk is read-only.  Explicitly
-     * check for read-only block devices so that Linux block devices behave
-     * properly.
-     */
-    struct stat st;
-    int readonly = 0;
-
-    if (fstat(s->fd, &st)) {
-        return -errno;
-    }
-
-    if (!S_ISBLK(st.st_mode)) {
-        return 0;
-    }
-
-    if (ioctl(s->fd, BLKROGET, &readonly) < 0) {
-        return -errno;
-    }
-
-    if (readonly) {
-        return -EACCES;
-    }
-#endif /* defined(BLKROGET) */
-    return 0;
-}
-
 static void hdev_parse_filename(const char *filename, QDict *options,
                                 Error **errp)
 {
@@ -3454,15 +3499,6 @@ hdev_open_Mac_error:
     /* Since this does ioctl the device must be already opened */
     bs->sg = hdev_is_sg(bs);
 
-    if (flags & BDRV_O_RDWR) {
-        ret = check_hdev_writable(s);
-        if (ret < 0) {
-            raw_close(bs);
-            error_setg_errno(errp, -ret, "The device is not writable");
-            return ret;
-        }
-    }
-
     return ret;
 }
 
diff --git a/block/trace-events b/block/trace-events
index dbe76a7613..d3533ca896 100644
--- a/block/trace-events
+++ b/block/trace-events
@@ -136,23 +136,6 @@ qed_aio_write_prefill(void *s, void *acb, uint64_t start, size_t len, uint64_t o
 qed_aio_write_postfill(void *s, void *acb, uint64_t start, size_t len, uint64_t offset) "s %p acb %p start %"PRIu64" len %zu offset %"PRIu64
 qed_aio_write_main(void *s, void *acb, int ret, uint64_t offset, size_t len) "s %p acb %p ret %d offset %"PRIu64" len %zu"
 
-# vxhs.c
-vxhs_iio_callback(int error) "ctx is NULL: error %d"
-vxhs_iio_callback_chnfail(int err, int error) "QNIO channel failed, no i/o %d, %d"
-vxhs_iio_callback_unknwn(int opcode, int err) "unexpected opcode %d, errno %d"
-vxhs_aio_rw_invalid(int req) "Invalid I/O request iodir %d"
-vxhs_aio_rw_ioerr(char *guid, int iodir, uint64_t size, uint64_t off, void *acb, int ret, int err) "IO ERROR (vDisk %s) FOR : Read/Write = %d size = %"PRIu64" offset = %"PRIu64" ACB = %p. Error = %d, errno = %d"
-vxhs_get_vdisk_stat_err(char *guid, int ret, int err) "vDisk (%s) stat ioctl failed, ret = %d, errno = %d"
-vxhs_get_vdisk_stat(char *vdisk_guid, uint64_t vdisk_size) "vDisk %s stat ioctl returned size %"PRIu64
-vxhs_complete_aio(void *acb, uint64_t ret) "aio failed acb %p ret %"PRIu64
-vxhs_parse_uri_filename(const char *filename) "URI passed via bdrv_parse_filename %s"
-vxhs_open_vdiskid(const char *vdisk_id) "Opening vdisk-id %s"
-vxhs_open_hostinfo(char *of_vsa_addr, int port) "Adding host %s:%d to BDRVVXHSState"
-vxhs_open_iio_open(const char *host) "Failed to connect to storage agent on host %s"
-vxhs_parse_uri_hostinfo(char *host, int port) "Host: IP %s, Port %d"
-vxhs_close(char *vdisk_guid) "Closing vdisk %s"
-vxhs_get_creds(const char *cacert, const char *client_key, const char *client_cert) "cacert %s, client_key %s, client_cert %s"
-
 # nvme.c
 nvme_kick(void *s, int queue) "s %p queue %d"
 nvme_dma_flush_queue_wait(void *s) "s %p"
diff --git a/block/vxhs.c b/block/vxhs.c
deleted file mode 100644
index dc0e254730..0000000000
--- a/block/vxhs.c
+++ /dev/null
@@ -1,587 +0,0 @@
-/*
- * QEMU Block driver for Veritas HyperScale (VxHS)
- *
- * Copyright (c) 2017 Veritas Technologies LLC.
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include <qnio/qnio_api.h>
-#include <sys/param.h>
-#include "block/block_int.h"
-#include "block/qdict.h"
-#include "qapi/qmp/qerror.h"
-#include "qapi/qmp/qdict.h"
-#include "qapi/qmp/qstring.h"
-#include "trace.h"
-#include "qemu/module.h"
-#include "qemu/uri.h"
-#include "qapi/error.h"
-#include "qemu/uuid.h"
-#include "crypto/tlscredsx509.h"
-#include "sysemu/replay.h"
-
-#define VXHS_OPT_FILENAME           "filename"
-#define VXHS_OPT_VDISK_ID           "vdisk-id"
-#define VXHS_OPT_SERVER             "server"
-#define VXHS_OPT_HOST               "host"
-#define VXHS_OPT_PORT               "port"
-
-/* Only accessed under QEMU global mutex */
-static uint32_t vxhs_ref;
-
-typedef enum {
-    VDISK_AIO_READ,
-    VDISK_AIO_WRITE,
-} VDISKAIOCmd;
-
-/*
- * HyperScale AIO callbacks structure
- */
-typedef struct VXHSAIOCB {
-    BlockAIOCB common;
-    int err;
-} VXHSAIOCB;
-
-typedef struct VXHSvDiskHostsInfo {
-    void *dev_handle; /* Device handle */
-    char *host; /* Host name or IP */
-    int port; /* Host's port number */
-} VXHSvDiskHostsInfo;
-
-/*
- * Structure per vDisk maintained for state
- */
-typedef struct BDRVVXHSState {
-    VXHSvDiskHostsInfo vdisk_hostinfo; /* Per host info */
-    char *vdisk_guid;
-    char *tlscredsid; /* tlscredsid */
-} BDRVVXHSState;
-
-static void vxhs_complete_aio_bh(void *opaque)
-{
-    VXHSAIOCB *acb = opaque;
-    BlockCompletionFunc *cb = acb->common.cb;
-    void *cb_opaque = acb->common.opaque;
-    int ret = 0;
-
-    if (acb->err != 0) {
-        trace_vxhs_complete_aio(acb, acb->err);
-        ret = (-EIO);
-    }
-
-    qemu_aio_unref(acb);
-    cb(cb_opaque, ret);
-}
-
-/*
- * Called from a libqnio thread
- */
-static void vxhs_iio_callback(void *ctx, uint32_t opcode, uint32_t error)
-{
-    VXHSAIOCB *acb = NULL;
-
-    switch (opcode) {
-    case IRP_READ_REQUEST:
-    case IRP_WRITE_REQUEST:
-
-        /*
-         * ctx is VXHSAIOCB*
-         * ctx is NULL if error is QNIOERROR_CHANNEL_HUP
-         */
-        if (ctx) {
-            acb = ctx;
-        } else {
-            trace_vxhs_iio_callback(error);
-            goto out;
-        }
-
-        if (error) {
-            if (!acb->err) {
-                acb->err = error;
-            }
-            trace_vxhs_iio_callback(error);
-        }
-
-        replay_bh_schedule_oneshot_event(bdrv_get_aio_context(acb->common.bs),
-                                         vxhs_complete_aio_bh, acb);
-        break;
-
-    default:
-        if (error == QNIOERROR_HUP) {
-            /*
-             * Channel failed, spontaneous notification,
-             * not in response to I/O
-             */
-            trace_vxhs_iio_callback_chnfail(error, errno);
-        } else {
-            trace_vxhs_iio_callback_unknwn(opcode, error);
-        }
-        break;
-    }
-out:
-    return;
-}
-
-static QemuOptsList runtime_opts = {
-    .name = "vxhs",
-    .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
-    .desc = {
-        {
-            .name = VXHS_OPT_FILENAME,
-            .type = QEMU_OPT_STRING,
-            .help = "URI to the Veritas HyperScale image",
-        },
-        {
-            .name = VXHS_OPT_VDISK_ID,
-            .type = QEMU_OPT_STRING,
-            .help = "UUID of the VxHS vdisk",
-        },
-        {
-            .name = "tls-creds",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the TLS/SSL credentials to use",
-        },
-        { /* end of list */ }
-    },
-};
-
-static QemuOptsList runtime_tcp_opts = {
-    .name = "vxhs_tcp",
-    .head = QTAILQ_HEAD_INITIALIZER(runtime_tcp_opts.head),
-    .desc = {
-        {
-            .name = VXHS_OPT_HOST,
-            .type = QEMU_OPT_STRING,
-            .help = "host address (ipv4 addresses)",
-        },
-        {
-            .name = VXHS_OPT_PORT,
-            .type = QEMU_OPT_NUMBER,
-            .help = "port number on which VxHSD is listening (default 9999)",
-            .def_value_str = "9999"
-        },
-        { /* end of list */ }
-    },
-};
-
-/*
- * Parse incoming URI and populate *options with the host
- * and device information
- */
-static int vxhs_parse_uri(const char *filename, QDict *options)
-{
-    URI *uri = NULL;
-    char *port;
-    int ret = 0;
-
-    trace_vxhs_parse_uri_filename(filename);
-    uri = uri_parse(filename);
-    if (!uri || !uri->server || !uri->path) {
-        uri_free(uri);
-        return -EINVAL;
-    }
-
-    qdict_put_str(options, VXHS_OPT_SERVER ".host", uri->server);
-
-    if (uri->port) {
-        port = g_strdup_printf("%d", uri->port);
-        qdict_put_str(options, VXHS_OPT_SERVER ".port", port);
-        g_free(port);
-    }
-
-    qdict_put_str(options, "vdisk-id", uri->path);
-
-    trace_vxhs_parse_uri_hostinfo(uri->server, uri->port);
-    uri_free(uri);
-
-    return ret;
-}
-
-static void vxhs_parse_filename(const char *filename, QDict *options,
-                                Error **errp)
-{
-    if (qdict_haskey(options, "vdisk-id") || qdict_haskey(options, "server")) {
-        error_setg(errp, "vdisk-id/server and a file name may not be specified "
-                         "at the same time");
-        return;
-    }
-
-    if (strstr(filename, "://")) {
-        int ret = vxhs_parse_uri(filename, options);
-        if (ret < 0) {
-            error_setg(errp, "Invalid URI. URI should be of the form "
-                       "  vxhs://<host_ip>:<port>/<vdisk-id>");
-        }
-    }
-}
-
-static void vxhs_refresh_limits(BlockDriverState *bs, Error **errp)
-{
-    /* XXX Does VXHS support AIO on less than 512-byte alignment? */
-    bs->bl.request_alignment = 512;
-}
-
-static int vxhs_init_and_ref(void)
-{
-    if (vxhs_ref++ == 0) {
-        if (iio_init(QNIO_VERSION, vxhs_iio_callback)) {
-            return -ENODEV;
-        }
-    }
-    return 0;
-}
-
-static void vxhs_unref(void)
-{
-    if (--vxhs_ref == 0) {
-        iio_fini();
-    }
-}
-
-static void vxhs_get_tls_creds(const char *id, char **cacert,
-                               char **key, char **cert, Error **errp)
-{
-    Object *obj;
-    QCryptoTLSCreds *creds;
-    QCryptoTLSCredsX509 *creds_x509;
-
-    obj = object_resolve_path_component(
-        object_get_objects_root(), id);
-
-    if (!obj) {
-        error_setg(errp, "No TLS credentials with id '%s'",
-                   id);
-        return;
-    }
-
-    creds_x509 = (QCryptoTLSCredsX509 *)
-        object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS_X509);
-
-    if (!creds_x509) {
-        error_setg(errp, "Object with id '%s' is not TLS credentials",
-                   id);
-        return;
-    }
-
-    creds = &creds_x509->parent_obj;
-
-    if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
-        error_setg(errp,
-                   "Expecting TLS credentials with a client endpoint");
-        return;
-    }
-
-    /*
-     * Get the cacert, client_cert and client_key file names.
-     */
-    if (!creds->dir) {
-        error_setg(errp, "TLS object missing 'dir' property value");
-        return;
-    }
-
-    *cacert = g_strdup_printf("%s/%s", creds->dir,
-                              QCRYPTO_TLS_CREDS_X509_CA_CERT);
-    *cert = g_strdup_printf("%s/%s", creds->dir,
-                            QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
-    *key = g_strdup_printf("%s/%s", creds->dir,
-                           QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
-}
-
-static int vxhs_open(BlockDriverState *bs, QDict *options,
-                     int bdrv_flags, Error **errp)
-{
-    BDRVVXHSState *s = bs->opaque;
-    void *dev_handlep;
-    QDict *backing_options = NULL;
-    QemuOpts *opts = NULL;
-    QemuOpts *tcp_opts = NULL;
-    char *of_vsa_addr = NULL;
-    Error *local_err = NULL;
-    const char *vdisk_id_opt;
-    const char *server_host_opt;
-    int ret = 0;
-    char *cacert = NULL;
-    char *client_key = NULL;
-    char *client_cert = NULL;
-
-    ret = vxhs_init_and_ref();
-    if (ret < 0) {
-        ret = -EINVAL;
-        goto out;
-    }
-
-    /* Create opts info from runtime_opts and runtime_tcp_opts list */
-    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
-    tcp_opts = qemu_opts_create(&runtime_tcp_opts, NULL, 0, &error_abort);
-
-    if (!qemu_opts_absorb_qdict(opts, options, errp)) {
-        ret = -EINVAL;
-        goto out;
-    }
-
-    /* vdisk-id is the disk UUID */
-    vdisk_id_opt = qemu_opt_get(opts, VXHS_OPT_VDISK_ID);
-    if (!vdisk_id_opt) {
-        error_setg(errp, QERR_MISSING_PARAMETER, VXHS_OPT_VDISK_ID);
-        ret = -EINVAL;
-        goto out;
-    }
-
-    /* vdisk-id may contain a leading '/' */
-    if (strlen(vdisk_id_opt) > UUID_FMT_LEN + 1) {
-        error_setg(errp, "vdisk-id cannot be more than %d characters",
-                   UUID_FMT_LEN);
-        ret = -EINVAL;
-        goto out;
-    }
-
-    s->vdisk_guid = g_strdup(vdisk_id_opt);
-    trace_vxhs_open_vdiskid(vdisk_id_opt);
-
-    /* get the 'server.' arguments */
-    qdict_extract_subqdict(options, &backing_options, VXHS_OPT_SERVER".");
-
-    if (!qemu_opts_absorb_qdict(tcp_opts, backing_options, errp)) {
-        ret = -EINVAL;
-        goto out;
-    }
-
-    server_host_opt = qemu_opt_get(tcp_opts, VXHS_OPT_HOST);
-    if (!server_host_opt) {
-        error_setg(errp, QERR_MISSING_PARAMETER,
-                   VXHS_OPT_SERVER"."VXHS_OPT_HOST);
-        ret = -EINVAL;
-        goto out;
-    }
-
-    if (strlen(server_host_opt) > MAXHOSTNAMELEN) {
-        error_setg(errp, "server.host cannot be more than %d characters",
-                   MAXHOSTNAMELEN);
-        ret = -EINVAL;
-        goto out;
-    }
-
-    /* check if we got tls-creds via the --object argument */
-    s->tlscredsid = g_strdup(qemu_opt_get(opts, "tls-creds"));
-    if (s->tlscredsid) {
-        vxhs_get_tls_creds(s->tlscredsid, &cacert, &client_key,
-                           &client_cert, &local_err);
-        if (local_err != NULL) {
-            ret = -EINVAL;
-            goto out;
-        }
-        trace_vxhs_get_creds(cacert, client_key, client_cert);
-    }
-
-    s->vdisk_hostinfo.host = g_strdup(server_host_opt);
-    s->vdisk_hostinfo.port = g_ascii_strtoll(qemu_opt_get(tcp_opts,
-                                                          VXHS_OPT_PORT),
-                                                          NULL, 0);
-
-    trace_vxhs_open_hostinfo(s->vdisk_hostinfo.host,
-                             s->vdisk_hostinfo.port);
-
-    of_vsa_addr = g_strdup_printf("of://%s:%d",
-                                  s->vdisk_hostinfo.host,
-                                  s->vdisk_hostinfo.port);
-
-    /*
-     * Open qnio channel to storage agent if not opened before
-     */
-    dev_handlep = iio_open(of_vsa_addr, s->vdisk_guid, 0,
-                           cacert, client_key, client_cert);
-    if (dev_handlep == NULL) {
-        trace_vxhs_open_iio_open(of_vsa_addr);
-        ret = -ENODEV;
-        goto out;
-    }
-    s->vdisk_hostinfo.dev_handle = dev_handlep;
-
-out:
-    g_free(of_vsa_addr);
-    qobject_unref(backing_options);
-    qemu_opts_del(tcp_opts);
-    qemu_opts_del(opts);
-    g_free(cacert);
-    g_free(client_key);
-    g_free(client_cert);
-
-    if (ret < 0) {
-        vxhs_unref();
-        g_free(s->vdisk_hostinfo.host);
-        g_free(s->vdisk_guid);
-        g_free(s->tlscredsid);
-        s->vdisk_guid = NULL;
-    }
-
-    return ret;
-}
-
-static const AIOCBInfo vxhs_aiocb_info = {
-    .aiocb_size = sizeof(VXHSAIOCB)
-};
-
-/*
- * This allocates QEMU-VXHS callback for each IO
- * and is passed to QNIO. When QNIO completes the work,
- * it will be passed back through the callback.
- */
-static BlockAIOCB *vxhs_aio_rw(BlockDriverState *bs, uint64_t offset,
-                               QEMUIOVector *qiov, uint64_t size,
-                               BlockCompletionFunc *cb, void *opaque,
-                               VDISKAIOCmd iodir)
-{
-    VXHSAIOCB *acb = NULL;
-    BDRVVXHSState *s = bs->opaque;
-    int iio_flags = 0;
-    int ret = 0;
-    void *dev_handle = s->vdisk_hostinfo.dev_handle;
-
-    acb = qemu_aio_get(&vxhs_aiocb_info, bs, cb, opaque);
-
-    /*
-     * Initialize VXHSAIOCB.
-     */
-    acb->err = 0;
-
-    iio_flags = IIO_FLAG_ASYNC;
-
-    switch (iodir) {
-    case VDISK_AIO_WRITE:
-            ret = iio_writev(dev_handle, acb, qiov->iov, qiov->niov,
-                             offset, size, iio_flags);
-            break;
-    case VDISK_AIO_READ:
-            ret = iio_readv(dev_handle, acb, qiov->iov, qiov->niov,
-                            offset, size, iio_flags);
-            break;
-    default:
-            trace_vxhs_aio_rw_invalid(iodir);
-            goto errout;
-    }
-
-    if (ret != 0) {
-        trace_vxhs_aio_rw_ioerr(s->vdisk_guid, iodir, size, offset,
-                                acb, ret, errno);
-        goto errout;
-    }
-    return &acb->common;
-
-errout:
-    qemu_aio_unref(acb);
-    return NULL;
-}
-
-static BlockAIOCB *vxhs_aio_preadv(BlockDriverState *bs,
-                                   uint64_t offset, uint64_t bytes,
-                                   QEMUIOVector *qiov, int flags,
-                                   BlockCompletionFunc *cb, void *opaque)
-{
-    return vxhs_aio_rw(bs, offset, qiov, bytes, cb, opaque, VDISK_AIO_READ);
-}
-
-static BlockAIOCB *vxhs_aio_pwritev(BlockDriverState *bs,
-                                    uint64_t offset, uint64_t bytes,
-                                    QEMUIOVector *qiov, int flags,
-                                    BlockCompletionFunc *cb, void *opaque)
-{
-    return vxhs_aio_rw(bs, offset, qiov, bytes, cb, opaque, VDISK_AIO_WRITE);
-}
-
-static void vxhs_close(BlockDriverState *bs)
-{
-    BDRVVXHSState *s = bs->opaque;
-
-    trace_vxhs_close(s->vdisk_guid);
-
-    g_free(s->vdisk_guid);
-    s->vdisk_guid = NULL;
-
-    /*
-     * Close vDisk device
-     */
-    if (s->vdisk_hostinfo.dev_handle) {
-        iio_close(s->vdisk_hostinfo.dev_handle);
-        s->vdisk_hostinfo.dev_handle = NULL;
-    }
-
-    vxhs_unref();
-
-    /*
-     * Free the dynamically allocated host string etc
-     */
-    g_free(s->vdisk_hostinfo.host);
-    g_free(s->tlscredsid);
-    s->tlscredsid = NULL;
-    s->vdisk_hostinfo.host = NULL;
-    s->vdisk_hostinfo.port = 0;
-}
-
-static int64_t vxhs_get_vdisk_stat(BDRVVXHSState *s)
-{
-    int64_t vdisk_size = -1;
-    int ret = 0;
-    void *dev_handle = s->vdisk_hostinfo.dev_handle;
-
-    ret = iio_ioctl(dev_handle, IOR_VDISK_STAT, &vdisk_size, 0);
-    if (ret < 0) {
-        trace_vxhs_get_vdisk_stat_err(s->vdisk_guid, ret, errno);
-        return -EIO;
-    }
-
-    trace_vxhs_get_vdisk_stat(s->vdisk_guid, vdisk_size);
-    return vdisk_size;
-}
-
-/*
- * Returns the size of vDisk in bytes. This is required
- * by QEMU block upper block layer so that it is visible
- * to guest.
- */
-static int64_t vxhs_getlength(BlockDriverState *bs)
-{
-    BDRVVXHSState *s = bs->opaque;
-    int64_t vdisk_size;
-
-    vdisk_size = vxhs_get_vdisk_stat(s);
-    if (vdisk_size < 0) {
-        return -EIO;
-    }
-
-    return vdisk_size;
-}
-
-static const char *const vxhs_strong_runtime_opts[] = {
-    VXHS_OPT_VDISK_ID,
-    "tls-creds",
-    VXHS_OPT_HOST,
-    VXHS_OPT_PORT,
-    VXHS_OPT_SERVER".",
-
-    NULL
-};
-
-static BlockDriver bdrv_vxhs = {
-    .format_name                  = "vxhs",
-    .protocol_name                = "vxhs",
-    .instance_size                = sizeof(BDRVVXHSState),
-    .bdrv_file_open               = vxhs_open,
-    .bdrv_parse_filename          = vxhs_parse_filename,
-    .bdrv_refresh_limits          = vxhs_refresh_limits,
-    .bdrv_close                   = vxhs_close,
-    .bdrv_getlength               = vxhs_getlength,
-    .bdrv_aio_preadv              = vxhs_aio_preadv,
-    .bdrv_aio_pwritev             = vxhs_aio_pwritev,
-    .strong_runtime_opts          = vxhs_strong_runtime_opts,
-};
-
-static void bdrv_vxhs_init(void)
-{
-    bdrv_register(&bdrv_vxhs);
-}
-
-block_init(bdrv_vxhs_init);