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[98.234.121.50]) by smtp.gmail.com with ESMTPSA id dj3sm6452062pad.1.2016.10.26.15.23.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Oct 2016 15:23:38 -0700 (PDT) From: Ashish Mittal X-Google-Original-From: Ashish Mittal To: qemu-devel@nongnu.org, pbonzini@redhat.com, kwolf@redhat.com, armbru@redhat.com, berrange@redhat.com, jcody@redhat.com, famz@redhat.com, ashish.mittal@veritas.com, stefanha@gmail.com, Rakesh.Ranjan@veritas.com, Buddhi.Madhav@veritas.com Date: Wed, 26 Oct 2016 15:23:05 -0700 Message-Id: <1477520585-8418-1-git-send-email-ashish.mittal@veritas.com> X-Mailer: git-send-email 2.5.5 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2607:f8b0:400e:c00::243 Subject: [Qemu-devel] [PATCH v2] block/vxhs: Add Veritas HyperScale VxHS block device support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ketan.Nilangekar@veritas.com, Abhijit.Dey@veritas.com, Venkatesha.Mg@veritas.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for a new block device type called "vxhs". Source code for the library that this code loads can be downloaded from: https://github.com/MittalAshish/libqnio.git Sample command line using JSON syntax: ./qemu-system-x86_64 -name instance-00000008 -S -vnc 0.0.0.0:0 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on 'json:{"driver":"vxhs","vdisk_id":"{c3e9095a-a5ee-4dce-afeb-2a59fb387410}","server":[{"host":"172.172.17.4","port":"9999"}]}' Sample command line using URI syntax: qemu-img convert -f raw -O raw -n /var/lib/nova/instances/_base/0c5eacd5ebea5ed914b6a3e7b18f1ce734c386ad vxhs://192.168.0.1:9999/%7Bc6718f6b-0401-441d-a8c3-1f0064d75ee0%7D Signed-off-by: Ashish Mittal --- v2 changelog: (1) Changes done in response to v1 comments. block/Makefile.objs | 2 + block/trace-events | 22 ++ block/vxhs.c | 682 ++++++++++++++++++++++++++++++++++++++++++++++++++++ configure | 41 ++++ 4 files changed, 747 insertions(+) create mode 100644 block/vxhs.c diff --git a/block/Makefile.objs b/block/Makefile.objs index 67a036a..58313a2 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -18,6 +18,7 @@ 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_ARCHIPELAGO) += archipelago.o block-obj-$(CONFIG_LIBSSH2) += ssh.o block-obj-y += accounting.o dirty-bitmap.o @@ -38,6 +39,7 @@ 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 := $(LIBSSH2_CFLAGS) ssh.o-libs := $(LIBSSH2_LIBS) archipelago.o-libs := $(ARCHIPELAGO_LIBS) diff --git a/block/trace-events b/block/trace-events index 05fa13c..aea97cb 100644 --- a/block/trace-events +++ b/block/trace-events @@ -114,3 +114,25 @@ qed_aio_write_data(void *s, void *acb, int ret, uint64_t offset, size_t len) "s qed_aio_write_prefill(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_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" + +# block/vxhs.c +vxhs_iio_callback(int error, int reason) "ctx is NULL: error %d, reason %d" +vxhs_setup_qnio(void *s) "Context to HyperScale IO manager = %p" +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_open_fail(int ret) "Could not open the device. Error = %d" +vxhs_open_epipe(int ret) "Could not create a pipe for device. Bailing out. Error=%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 = %lu offset = %lu 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 %lu" +vxhs_qnio_iio_open(const char *ip) "Failed to connect to storage agent on host-ip %s" +vxhs_qnio_iio_devopen(const char *fname) "Failed to open vdisk device: %s" +vxhs_complete_aio(void *acb, uint64_t ret) "aio failed acb %p ret %ld" +vxhs_parse_uri_filename(const char *filename) "URI passed via bdrv_parse_filename %s" +vxhs_qemu_init_vdisk(const char *vdisk_id) "vdisk_id from json %s" +vxhs_qemu_init_numservers(int num_servers) "Number of servers passed = %d" +vxhs_parse_uri_hostinfo(int num, char *host, int port) "Host %d: IP %s, Port %d" +vxhs_qemu_init(char *of_vsa_addr, int port) "Adding host %s:%d to BDRVVXHSState" +vxhs_qemu_init_filename(const char *filename) "Filename passed as %s" +vxhs_close(char *vdisk_guid) "Closing vdisk %s" diff --git a/block/vxhs.c b/block/vxhs.c new file mode 100644 index 0000000..0facb33 --- /dev/null +++ b/block/vxhs.c @@ -0,0 +1,682 @@ +/* + * QEMU Block driver for Veritas HyperScale (VxHS) + * + * 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 "block/block_int.h" +#include +#include "qapi/qmp/qerror.h" +#include "qapi/qmp/qdict.h" +#include "qapi/qmp/qstring.h" +#include "trace.h" +#include "qemu/uri.h" +#include "qapi/error.h" +#include "qemu/error-report.h" + +#define VDISK_FD_READ 0 +#define VDISK_FD_WRITE 1 + +#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" + +/* qnio client ioapi_ctx */ +static void *global_qnio_ctx; + +/* vdisk prefix to pass to qnio */ +static const char vdisk_prefix[] = "/dev/of/vdisk"; + +typedef enum { + VDISK_AIO_READ, + VDISK_AIO_WRITE, + VDISK_STAT +} VDISKAIOCmd; + +/* + * HyperScale AIO callbacks structure + */ +typedef struct VXHSAIOCB { + BlockAIOCB common; + int err; + int direction; /* IO direction (r/w) */ + size_t io_offset; + size_t size; + QEMUIOVector *qiov; +} VXHSAIOCB; + +typedef struct VXHSvDiskHostsInfo { + int qnio_cfd; /* Channel FD */ + int vdisk_rfd; /* vDisk remote FD */ + char *hostip; /* Host's IP addresses */ + int port; /* Host's port number */ +} VXHSvDiskHostsInfo; + +/* + * Structure per vDisk maintained for state + */ +typedef struct BDRVVXHSState { + int fds[2]; + int64_t vdisk_size; + int event_reader_pos; + VXHSAIOCB *qnio_event_acb; + VXHSvDiskHostsInfo vdisk_hostinfo; /* Per host info */ + char *vdisk_guid; +} BDRVVXHSState; + +static void vxhs_qnio_iio_close(BDRVVXHSState *s) +{ + /* + * Close vDisk device + */ + if (s->vdisk_hostinfo.vdisk_rfd >= 0) { + iio_devclose(global_qnio_ctx, 0, s->vdisk_hostinfo.vdisk_rfd); + s->vdisk_hostinfo.vdisk_rfd = -1; + } + + /* + * Close QNIO channel against cached channel-fd + */ + if (s->vdisk_hostinfo.qnio_cfd >= 0) { + iio_close(global_qnio_ctx, s->vdisk_hostinfo.qnio_cfd); + s->vdisk_hostinfo.qnio_cfd = -1; + } +} + +static int vxhs_qnio_iio_open(int *cfd, const char *of_vsa_addr, + int *rfd, const char *file_name) +{ + /* + * Open qnio channel to storage agent if not opened before. + */ + if (*cfd < 0) { + *cfd = iio_open(global_qnio_ctx, of_vsa_addr, 0); + if (*cfd < 0) { + trace_vxhs_qnio_iio_open(of_vsa_addr); + return -ENODEV; + } + } + + /* + * Open vdisk device + */ + *rfd = iio_devopen(global_qnio_ctx, *cfd, file_name, 0); + if (*rfd < 0) { + if (*cfd >= 0) { + iio_close(global_qnio_ctx, *cfd); + *cfd = -1; + *rfd = -1; + } + + trace_vxhs_qnio_iio_devopen(file_name); + return -ENODEV; + } + + return 0; +} + +static void vxhs_iio_callback(int32_t rfd, uint32_t reason, void *ctx, + uint32_t error, uint32_t opcode) +{ + VXHSAIOCB *acb = NULL; + BDRVVXHSState *s = NULL; + ssize_t ret; + + switch (opcode) { + case IRP_READ_REQUEST: + case IRP_WRITE_REQUEST: + + /* + * ctx is VXHSAIOCB* + * ctx is NULL if error is QNIOERROR_CHANNEL_HUP or + * reason is IIO_REASON_HUP + */ + if (ctx) { + acb = ctx; + s = acb->common.bs->opaque; + } else { + trace_vxhs_iio_callback(error, reason); + goto out; + } + + if (error) { + if (!acb->err) { + acb->err = error; + } + trace_vxhs_iio_callback(error, reason); + } + + ret = qemu_write_full(s->fds[VDISK_FD_WRITE], &acb, sizeof(acb)); + g_assert(ret == sizeof(acb)); + break; + + default: + if (error == QNIOERROR_CHANNEL_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 void vxhs_complete_aio(VXHSAIOCB *acb, BDRVVXHSState *s) +{ + BlockCompletionFunc *cb = acb->common.cb; + void *opaque = acb->common.opaque; + int ret = 0; + + if (acb->err != 0) { + trace_vxhs_complete_aio(acb, acb->err); + /* + * We mask all the IO errors generically as EIO for upper layers + * Right now our IO Manager uses non standard error codes. Instead + * of confusing upper layers with incorrect interpretation we are + * doing this workaround. + */ + ret = (-EIO); + } + + qemu_aio_unref(acb); + cb(opaque, ret); +} + +/* + * This is the HyperScale event handler registered to QEMU. + * It is invoked when any IO gets completed and written on pipe + * by callback called from QNIO thread context. Then it marks + * the AIO as completed, and releases HyperScale AIO callbacks. + */ +static void vxhs_aio_event_reader(void *opaque) +{ + BDRVVXHSState *s = opaque; + char *p; + ssize_t ret; + + do { + p = (char *)&s->qnio_event_acb; + ret = read(s->fds[VDISK_FD_READ], p + s->event_reader_pos, + sizeof(s->qnio_event_acb) - s->event_reader_pos); + if (ret > 0) { + s->event_reader_pos += ret; + if (s->event_reader_pos == sizeof(s->qnio_event_acb)) { + s->event_reader_pos = 0; + vxhs_complete_aio(s->qnio_event_acb, s); + } + } + } while (ret < 0 && errno == EINTR); +} + +/* + * Call QNIO operation to create channels to do IO on vDisk. + */ + +static void *vxhs_setup_qnio(void) +{ + void *qnio_ctx = NULL; + + qnio_ctx = iio_init(vxhs_iio_callback); + if (qnio_ctx != NULL) { + trace_vxhs_setup_qnio(qnio_ctx); + } + return qnio_ctx; +} + +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", + }, + { /* 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 the incoming URI and populate *options with the host information. + * URI syntax has the limitation of supporting only one host info. + * To pass multiple host information, use the JSON syntax. + */ +static int vxhs_parse_uri(const char *filename, QDict *options) +{ + URI *uri = NULL; + char *hoststr, *portstr; + 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; + } + + hoststr = g_strdup(VXHS_OPT_SERVER"0.host"); + qdict_put(options, hoststr, qstring_from_str(uri->server)); + g_free(hoststr); + + portstr = g_strdup(VXHS_OPT_SERVER"0.port"); + if (uri->port) { + port = g_strdup_printf("%d", uri->port); + qdict_put(options, portstr, qstring_from_str(port)); + g_free(port); + } + g_free(portstr); + + if (strstr(uri->path, "vxhs") == NULL) { + qdict_put(options, "vdisk_id", qstring_from_str(uri->path)); + } + + trace_vxhs_parse_uri_hostinfo(1, 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://:/{}"); + } + } +} + +static int vxhs_qemu_init(QDict *options, BDRVVXHSState *s, + int *cfd, int *rfd, Error **errp) +{ + QDict *backing_options = NULL; + QemuOpts *opts, *tcp_opts; + const char *vxhs_filename; + char *of_vsa_addr = NULL; + Error *local_err = NULL; + const char *vdisk_id_opt; + char *file_name = NULL; + size_t num_servers = 0; + char *str = NULL; + int ret = 0; + + opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); + qemu_opts_absorb_qdict(opts, options, &local_err); + if (local_err) { + ret = -EINVAL; + goto out; + } + + vxhs_filename = qemu_opt_get(opts, VXHS_OPT_FILENAME); + if (vxhs_filename) { + trace_vxhs_qemu_init_filename(vxhs_filename); + } + + vdisk_id_opt = qemu_opt_get(opts, VXHS_OPT_VDISK_ID); + if (!vdisk_id_opt) { + error_setg(&local_err, QERR_MISSING_PARAMETER, VXHS_OPT_VDISK_ID); + ret = -EINVAL; + goto out; + } + s->vdisk_guid = g_strdup(vdisk_id_opt); + trace_vxhs_qemu_init_vdisk(vdisk_id_opt); + + num_servers = qdict_array_entries(options, VXHS_OPT_SERVER); + if (num_servers < 1) { + error_setg(&local_err, QERR_MISSING_PARAMETER, "server"); + ret = -EINVAL; + goto out; + } else if (num_servers > 1) { + error_setg(&local_err, QERR_INVALID_PARAMETER, "server"); + error_append_hint(&local_err, "Only one server allowed.\n"); + ret = -EINVAL; + goto out; + } + trace_vxhs_qemu_init_numservers(num_servers); + + str = g_strdup_printf(VXHS_OPT_SERVER"0."); + qdict_extract_subqdict(options, &backing_options, str); + + /* Create opts info from runtime_tcp_opts list */ + tcp_opts = qemu_opts_create(&runtime_tcp_opts, NULL, 0, &error_abort); + qemu_opts_absorb_qdict(tcp_opts, backing_options, &local_err); + if (local_err) { + qdict_del(backing_options, str); + qemu_opts_del(tcp_opts); + ret = -EINVAL; + goto out; + } + + s->vdisk_hostinfo.hostip = g_strdup(qemu_opt_get(tcp_opts, + VXHS_OPT_HOST)); + s->vdisk_hostinfo.port = g_ascii_strtoll(qemu_opt_get(tcp_opts, + VXHS_OPT_PORT), + NULL, 0); + + s->vdisk_hostinfo.qnio_cfd = -1; + s->vdisk_hostinfo.vdisk_rfd = -1; + trace_vxhs_qemu_init(s->vdisk_hostinfo.hostip, + s->vdisk_hostinfo.port); + + qdict_del(backing_options, str); + qemu_opts_del(tcp_opts); + + file_name = g_strdup_printf("%s%s", vdisk_prefix, s->vdisk_guid); + of_vsa_addr = g_strdup_printf("of://%s:%d", + s->vdisk_hostinfo.hostip, + s->vdisk_hostinfo.port); + + /* + * .bdrv_open() and .bdrv_create() run under the QEMU global mutex. + */ + if (global_qnio_ctx == NULL) { + global_qnio_ctx = vxhs_setup_qnio(); + if (global_qnio_ctx == NULL) { + error_setg(&local_err, "Failed vxhs_setup_qnio"); + ret = -EINVAL; + goto out; + } + } + + ret = vxhs_qnio_iio_open(cfd, of_vsa_addr, rfd, file_name); + if (ret) { + error_setg(&local_err, "Failed qnio_iio_open"); + ret = -EIO; + } + +out: + g_free(str); + g_free(file_name); + g_free(of_vsa_addr); + qemu_opts_del(opts); + + if (ret < 0) { + error_propagate(errp, local_err); + g_free(s->vdisk_hostinfo.hostip); + g_free(s->vdisk_guid); + s->vdisk_guid = NULL; + errno = -ret; + } + + return ret; +} + +static int vxhs_open(BlockDriverState *bs, QDict *options, + int bdrv_flags, Error **errp) +{ + BDRVVXHSState *s = bs->opaque; + AioContext *aio_context; + int qemu_qnio_cfd = -1; + bool device_opened = false; + int qemu_rfd = -1; + int ret = 0; + + ret = vxhs_qemu_init(options, s, &qemu_qnio_cfd, &qemu_rfd, errp); + if (ret < 0) { + trace_vxhs_open_fail(ret); + return ret; + } + + device_opened = true; + s->vdisk_hostinfo.qnio_cfd = qemu_qnio_cfd; + s->vdisk_hostinfo.vdisk_rfd = qemu_rfd; + s->vdisk_size = -1; + + /* + * Create a pipe for communicating between two threads in different + * context. Set handler for read event, which gets triggered when + * IO completion is done by non-QEMU context. + */ + ret = qemu_pipe(s->fds); + if (ret < 0) { + trace_vxhs_open_epipe(ret); + ret = -errno; + goto errout; + } + fcntl(s->fds[VDISK_FD_READ], F_SETFL, O_NONBLOCK); + + aio_context = bdrv_get_aio_context(bs); + aio_set_fd_handler(aio_context, s->fds[VDISK_FD_READ], + false, vxhs_aio_event_reader, NULL, s); + return 0; + +errout: + /* + * Close remote vDisk device if it was opened earlier + */ + if (device_opened) { + vxhs_qnio_iio_close(s); + } + trace_vxhs_open_fail(ret); + 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, int64_t sector_num, + QEMUIOVector *qiov, int nb_sectors, + BlockCompletionFunc *cb, void *opaque, int iodir) +{ + VXHSAIOCB *acb = NULL; + BDRVVXHSState *s = bs->opaque; + size_t size; + uint64_t offset; + int iio_flags = 0; + int ret = 0; + uint32_t rfd = s->vdisk_hostinfo.vdisk_rfd; + + offset = sector_num * BDRV_SECTOR_SIZE; + size = nb_sectors * BDRV_SECTOR_SIZE; + acb = qemu_aio_get(&vxhs_aiocb_info, bs, cb, opaque); + /* + * Setup or initialize VXHSAIOCB. + * Every single field should be initialized since + * acb will be picked up from the slab without + * initializing with zero. + */ + acb->io_offset = offset; + acb->size = size; + acb->err = 0; + acb->qiov = qiov; + acb->direction = iodir; + + iio_flags = (IIO_FLAG_DONE | IIO_FLAG_ASYNC); + + switch (iodir) { + case VDISK_AIO_WRITE: + ret = iio_writev(global_qnio_ctx, rfd, qiov->iov, qiov->niov, + offset, (uint64_t)size, (void *)acb, iio_flags); + break; + case VDISK_AIO_READ: + ret = iio_readv(global_qnio_ctx, rfd, qiov->iov, qiov->niov, + offset, (uint64_t)size, (void *)acb, 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_readv(BlockDriverState *bs, + int64_t sector_num, QEMUIOVector *qiov, + int nb_sectors, + BlockCompletionFunc *cb, void *opaque) +{ + return vxhs_aio_rw(bs, sector_num, qiov, nb_sectors, cb, + opaque, VDISK_AIO_READ); +} + +static BlockAIOCB *vxhs_aio_writev(BlockDriverState *bs, + int64_t sector_num, QEMUIOVector *qiov, + int nb_sectors, + BlockCompletionFunc *cb, void *opaque) +{ + return vxhs_aio_rw(bs, sector_num, qiov, nb_sectors, + cb, opaque, VDISK_AIO_WRITE); +} + +static void vxhs_close(BlockDriverState *bs) +{ + BDRVVXHSState *s = bs->opaque; + + trace_vxhs_close(s->vdisk_guid); + close(s->fds[VDISK_FD_READ]); + close(s->fds[VDISK_FD_WRITE]); + + /* + * Clearing all the event handlers for oflame registered to QEMU + */ + aio_set_fd_handler(bdrv_get_aio_context(bs), s->fds[VDISK_FD_READ], + false, NULL, NULL, NULL); + g_free(s->vdisk_guid); + s->vdisk_guid = NULL; + vxhs_qnio_iio_close(s); + + /* + * Free the dynamically allocated hostip string + */ + g_free(s->vdisk_hostinfo.hostip); + s->vdisk_hostinfo.hostip = NULL; + s->vdisk_hostinfo.port = 0; +} + +static int64_t vxhs_get_vdisk_stat(BDRVVXHSState *s) +{ + int64_t vdisk_size = -1; + int ret = 0; + uint32_t rfd = s->vdisk_hostinfo.vdisk_rfd; + + ret = iio_ioctl(global_qnio_ctx, rfd, IOR_VDISK_STAT, &vdisk_size, NULL, 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; + + if (s->vdisk_size >= 0) { + vdisk_size = s->vdisk_size; + } else { + /* + * Fetch the vDisk size using stat ioctl + */ + vdisk_size = vxhs_get_vdisk_stat(s); + if (vdisk_size >= 0) { + s->vdisk_size = vdisk_size; + } + } + + return vdisk_size; +} + +static void vxhs_detach_aio_context(BlockDriverState *bs) +{ + BDRVVXHSState *s = bs->opaque; + + aio_set_fd_handler(bdrv_get_aio_context(bs), s->fds[VDISK_FD_READ], + false, NULL, NULL, NULL); + +} + +static void vxhs_attach_aio_context(BlockDriverState *bs, + AioContext *new_context) +{ + BDRVVXHSState *s = bs->opaque; + + aio_set_fd_handler(new_context, s->fds[VDISK_FD_READ], + false, vxhs_aio_event_reader, NULL, s); +} + +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_close = vxhs_close, + .bdrv_getlength = vxhs_getlength, + .bdrv_aio_readv = vxhs_aio_readv, + .bdrv_aio_writev = vxhs_aio_writev, + .bdrv_detach_aio_context = vxhs_detach_aio_context, + .bdrv_attach_aio_context = vxhs_attach_aio_context, +}; + +static void bdrv_vxhs_init(void) +{ + bdrv_register(&bdrv_vxhs); +} + +block_init(bdrv_vxhs_init); diff --git a/configure b/configure index d3dafcb..4413e88 100755 --- a/configure +++ b/configure @@ -321,6 +321,7 @@ numa="" tcmalloc="no" jemalloc="no" replication="yes" +vxhs="" # parse CC options first for opt do @@ -1162,6 +1163,11 @@ for opt do ;; --enable-replication) replication="yes" ;; + --disable-vxhs) vxhs="no" + ;; + --enable-vxhs) vxhs="yes" + ;; + *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -1391,6 +1397,7 @@ disabled with --disable-FEATURE, default is enabled if available: tcmalloc tcmalloc support jemalloc jemalloc support replication replication support + vxhs Veritas HyperScale vDisk backend support NOTE: The object files are built at the place where configure is launched EOF @@ -4625,6 +4632,33 @@ if do_cc -nostdlib -Wl,-r -Wl,--no-relax -o $TMPMO $TMPO; then fi ########################################## +# Veritas HyperScale block driver VxHS +# Check if libqnio is installed + +if test "$vxhs" != "no" ; then + cat > $TMPC < +#include + +void *vxhs_callback; + +int main(void) { + iio_init(vxhs_callback); + return 0; +} +EOF + vxhs_libs="-lqnio" + if compile_prog "" "$vxhs_libs" ; then + vxhs=yes + else + if test "$vxhs" = "yes" ; then + feature_not_found "vxhs block device" "Install libqnio. See github" + fi + vxhs=no + fi +fi + +########################################## # End of CC checks # After here, no more $cc or $ld runs @@ -4990,6 +5024,7 @@ echo "tcmalloc support $tcmalloc" echo "jemalloc support $jemalloc" echo "avx2 optimization $avx2_opt" echo "replication support $replication" +echo "VxHS block device $vxhs" if test "$sdl_too_old" = "yes"; then echo "-> Your SDL version is too old - please upgrade to have SDL support" @@ -5590,6 +5625,12 @@ if test "$pthread_setname_np" = "yes" ; then echo "CONFIG_PTHREAD_SETNAME_NP=y" >> $config_host_mak fi +if test "$vxhs" = "yes" ; then + echo "CONFIG_VXHS=y" >> $config_host_mak + echo "VXHS_CFLAGS=$vxhs_cflags" >> $config_host_mak + echo "VXHS_LIBS=$vxhs_libs" >> $config_host_mak +fi + if test "$tcg_interpreter" = "yes"; then QEMU_INCLUDES="-I\$(SRC_PATH)/tcg/tci $QEMU_INCLUDES" elif test "$ARCH" = "sparc64" ; then