diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/Makefile.objs | 2 | ||||
| -rw-r--r-- | block/file-posix.c | 122 | ||||
| -rw-r--r-- | block/trace-events | 17 | ||||
| -rw-r--r-- | block/vxhs.c | 587 |
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); |