| /* |
| * QEMU Block backends |
| * |
| * Copyright (C) 2014 Red Hat, Inc. |
| * |
| * Authors: |
| * Markus Armbruster <armbru@redhat.com>, |
| * |
| * This work is licensed under the terms of the GNU LGPL, version 2.1 |
| * or later. See the COPYING.LIB file in the top-level directory. |
| */ |
| |
| #include "sysemu/block-backend.h" |
| #include "block/block_int.h" |
| #include "sysemu/blockdev.h" |
| #include "qapi-event.h" |
| |
| /* Number of coroutines to reserve per attached device model */ |
| #define COROUTINE_POOL_RESERVATION 64 |
| |
| struct BlockBackend { |
| char *name; |
| int refcnt; |
| BlockDriverState *bs; |
| DriveInfo *legacy_dinfo; /* null unless created by drive_new() */ |
| QTAILQ_ENTRY(BlockBackend) link; /* for blk_backends */ |
| |
| void *dev; /* attached device model, if any */ |
| /* TODO change to DeviceState when all users are qdevified */ |
| const BlockDevOps *dev_ops; |
| void *dev_opaque; |
| }; |
| |
| typedef struct BlockBackendAIOCB { |
| BlockAIOCB common; |
| QEMUBH *bh; |
| int ret; |
| } BlockBackendAIOCB; |
| |
| static const AIOCBInfo block_backend_aiocb_info = { |
| .aiocb_size = sizeof(BlockBackendAIOCB), |
| }; |
| |
| static void drive_info_del(DriveInfo *dinfo); |
| |
| /* All the BlockBackends (except for hidden ones) */ |
| static QTAILQ_HEAD(, BlockBackend) blk_backends = |
| QTAILQ_HEAD_INITIALIZER(blk_backends); |
| |
| /* |
| * Create a new BlockBackend with @name, with a reference count of one. |
| * @name must not be null or empty. |
| * Fail if a BlockBackend with this name already exists. |
| * Store an error through @errp on failure, unless it's null. |
| * Return the new BlockBackend on success, null on failure. |
| */ |
| BlockBackend *blk_new(const char *name, Error **errp) |
| { |
| BlockBackend *blk; |
| |
| assert(name && name[0]); |
| if (!id_wellformed(name)) { |
| error_setg(errp, "Invalid device name"); |
| return NULL; |
| } |
| if (blk_by_name(name)) { |
| error_setg(errp, "Device with id '%s' already exists", name); |
| return NULL; |
| } |
| if (bdrv_find_node(name)) { |
| error_setg(errp, |
| "Device name '%s' conflicts with an existing node name", |
| name); |
| return NULL; |
| } |
| |
| blk = g_new0(BlockBackend, 1); |
| blk->name = g_strdup(name); |
| blk->refcnt = 1; |
| QTAILQ_INSERT_TAIL(&blk_backends, blk, link); |
| return blk; |
| } |
| |
| /* |
| * Create a new BlockBackend with a new BlockDriverState attached. |
| * Otherwise just like blk_new(), which see. |
| */ |
| BlockBackend *blk_new_with_bs(const char *name, Error **errp) |
| { |
| BlockBackend *blk; |
| BlockDriverState *bs; |
| |
| blk = blk_new(name, errp); |
| if (!blk) { |
| return NULL; |
| } |
| |
| bs = bdrv_new_root(); |
| blk->bs = bs; |
| bs->blk = blk; |
| return blk; |
| } |
| |
| /* |
| * Calls blk_new_with_bs() and then calls bdrv_open() on the BlockDriverState. |
| * |
| * Just as with bdrv_open(), after having called this function the reference to |
| * @options belongs to the block layer (even on failure). |
| * |
| * TODO: Remove @filename and @flags; it should be possible to specify a whole |
| * BDS tree just by specifying the @options QDict (or @reference, |
| * alternatively). At the time of adding this function, this is not possible, |
| * though, so callers of this function have to be able to specify @filename and |
| * @flags. |
| */ |
| BlockBackend *blk_new_open(const char *name, const char *filename, |
| const char *reference, QDict *options, int flags, |
| Error **errp) |
| { |
| BlockBackend *blk; |
| int ret; |
| |
| blk = blk_new_with_bs(name, errp); |
| if (!blk) { |
| QDECREF(options); |
| return NULL; |
| } |
| |
| ret = bdrv_open(&blk->bs, filename, reference, options, flags, NULL, errp); |
| if (ret < 0) { |
| blk_unref(blk); |
| return NULL; |
| } |
| |
| return blk; |
| } |
| |
| static void blk_delete(BlockBackend *blk) |
| { |
| assert(!blk->refcnt); |
| assert(!blk->dev); |
| if (blk->bs) { |
| assert(blk->bs->blk == blk); |
| blk->bs->blk = NULL; |
| bdrv_unref(blk->bs); |
| blk->bs = NULL; |
| } |
| /* Avoid double-remove after blk_hide_on_behalf_of_hmp_drive_del() */ |
| if (blk->name[0]) { |
| QTAILQ_REMOVE(&blk_backends, blk, link); |
| } |
| g_free(blk->name); |
| drive_info_del(blk->legacy_dinfo); |
| g_free(blk); |
| } |
| |
| static void drive_info_del(DriveInfo *dinfo) |
| { |
| if (!dinfo) { |
| return; |
| } |
| qemu_opts_del(dinfo->opts); |
| g_free(dinfo->serial); |
| g_free(dinfo); |
| } |
| |
| /* |
| * Increment @blk's reference count. |
| * @blk must not be null. |
| */ |
| void blk_ref(BlockBackend *blk) |
| { |
| blk->refcnt++; |
| } |
| |
| /* |
| * Decrement @blk's reference count. |
| * If this drops it to zero, destroy @blk. |
| * For convenience, do nothing if @blk is null. |
| */ |
| void blk_unref(BlockBackend *blk) |
| { |
| if (blk) { |
| assert(blk->refcnt > 0); |
| if (!--blk->refcnt) { |
| blk_delete(blk); |
| } |
| } |
| } |
| |
| /* |
| * Return the BlockBackend after @blk. |
| * If @blk is null, return the first one. |
| * Else, return @blk's next sibling, which may be null. |
| * |
| * To iterate over all BlockBackends, do |
| * for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
| * ... |
| * } |
| */ |
| BlockBackend *blk_next(BlockBackend *blk) |
| { |
| return blk ? QTAILQ_NEXT(blk, link) : QTAILQ_FIRST(&blk_backends); |
| } |
| |
| /* |
| * Return @blk's name, a non-null string. |
| * Wart: the name is empty iff @blk has been hidden with |
| * blk_hide_on_behalf_of_hmp_drive_del(). |
| */ |
| const char *blk_name(BlockBackend *blk) |
| { |
| return blk->name; |
| } |
| |
| /* |
| * Return the BlockBackend with name @name if it exists, else null. |
| * @name must not be null. |
| */ |
| BlockBackend *blk_by_name(const char *name) |
| { |
| BlockBackend *blk; |
| |
| assert(name); |
| QTAILQ_FOREACH(blk, &blk_backends, link) { |
| if (!strcmp(name, blk->name)) { |
| return blk; |
| } |
| } |
| return NULL; |
| } |
| |
| /* |
| * Return the BlockDriverState attached to @blk if any, else null. |
| */ |
| BlockDriverState *blk_bs(BlockBackend *blk) |
| { |
| return blk->bs; |
| } |
| |
| /* |
| * Return @blk's DriveInfo if any, else null. |
| */ |
| DriveInfo *blk_legacy_dinfo(BlockBackend *blk) |
| { |
| return blk->legacy_dinfo; |
| } |
| |
| /* |
| * Set @blk's DriveInfo to @dinfo, and return it. |
| * @blk must not have a DriveInfo set already. |
| * No other BlockBackend may have the same DriveInfo set. |
| */ |
| DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo) |
| { |
| assert(!blk->legacy_dinfo); |
| return blk->legacy_dinfo = dinfo; |
| } |
| |
| /* |
| * Return the BlockBackend with DriveInfo @dinfo. |
| * It must exist. |
| */ |
| BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo) |
| { |
| BlockBackend *blk; |
| |
| QTAILQ_FOREACH(blk, &blk_backends, link) { |
| if (blk->legacy_dinfo == dinfo) { |
| return blk; |
| } |
| } |
| abort(); |
| } |
| |
| /* |
| * Hide @blk. |
| * @blk must not have been hidden already. |
| * Make attached BlockDriverState, if any, anonymous. |
| * Once hidden, @blk is invisible to all functions that don't receive |
| * it as argument. For example, blk_by_name() won't return it. |
| * Strictly for use by do_drive_del(). |
| * TODO get rid of it! |
| */ |
| void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk) |
| { |
| QTAILQ_REMOVE(&blk_backends, blk, link); |
| blk->name[0] = 0; |
| if (blk->bs) { |
| bdrv_make_anon(blk->bs); |
| } |
| } |
| |
| /* |
| * Attach device model @dev to @blk. |
| * Return 0 on success, -EBUSY when a device model is attached already. |
| */ |
| int blk_attach_dev(BlockBackend *blk, void *dev) |
| /* TODO change to DeviceState *dev when all users are qdevified */ |
| { |
| if (blk->dev) { |
| return -EBUSY; |
| } |
| blk_ref(blk); |
| blk->dev = dev; |
| bdrv_iostatus_reset(blk->bs); |
| return 0; |
| } |
| |
| /* |
| * Attach device model @dev to @blk. |
| * @blk must not have a device model attached already. |
| * TODO qdevified devices don't use this, remove when devices are qdevified |
| */ |
| void blk_attach_dev_nofail(BlockBackend *blk, void *dev) |
| { |
| if (blk_attach_dev(blk, dev) < 0) { |
| abort(); |
| } |
| } |
| |
| /* |
| * Detach device model @dev from @blk. |
| * @dev must be currently attached to @blk. |
| */ |
| void blk_detach_dev(BlockBackend *blk, void *dev) |
| /* TODO change to DeviceState *dev when all users are qdevified */ |
| { |
| assert(blk->dev == dev); |
| blk->dev = NULL; |
| blk->dev_ops = NULL; |
| blk->dev_opaque = NULL; |
| bdrv_set_guest_block_size(blk->bs, 512); |
| blk_unref(blk); |
| } |
| |
| /* |
| * Return the device model attached to @blk if any, else null. |
| */ |
| void *blk_get_attached_dev(BlockBackend *blk) |
| /* TODO change to return DeviceState * when all users are qdevified */ |
| { |
| return blk->dev; |
| } |
| |
| /* |
| * Set @blk's device model callbacks to @ops. |
| * @opaque is the opaque argument to pass to the callbacks. |
| * This is for use by device models. |
| */ |
| void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, |
| void *opaque) |
| { |
| blk->dev_ops = ops; |
| blk->dev_opaque = opaque; |
| } |
| |
| /* |
| * Notify @blk's attached device model of media change. |
| * If @load is true, notify of media load. |
| * Else, notify of media eject. |
| * Also send DEVICE_TRAY_MOVED events as appropriate. |
| */ |
| void blk_dev_change_media_cb(BlockBackend *blk, bool load) |
| { |
| if (blk->dev_ops && blk->dev_ops->change_media_cb) { |
| bool tray_was_closed = !blk_dev_is_tray_open(blk); |
| |
| blk->dev_ops->change_media_cb(blk->dev_opaque, load); |
| if (tray_was_closed) { |
| /* tray open */ |
| qapi_event_send_device_tray_moved(blk_name(blk), |
| true, &error_abort); |
| } |
| if (load) { |
| /* tray close */ |
| qapi_event_send_device_tray_moved(blk_name(blk), |
| false, &error_abort); |
| } |
| } |
| } |
| |
| /* |
| * Does @blk's attached device model have removable media? |
| * %true if no device model is attached. |
| */ |
| bool blk_dev_has_removable_media(BlockBackend *blk) |
| { |
| return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb); |
| } |
| |
| /* |
| * Notify @blk's attached device model of a media eject request. |
| * If @force is true, the medium is about to be yanked out forcefully. |
| */ |
| void blk_dev_eject_request(BlockBackend *blk, bool force) |
| { |
| if (blk->dev_ops && blk->dev_ops->eject_request_cb) { |
| blk->dev_ops->eject_request_cb(blk->dev_opaque, force); |
| } |
| } |
| |
| /* |
| * Does @blk's attached device model have a tray, and is it open? |
| */ |
| bool blk_dev_is_tray_open(BlockBackend *blk) |
| { |
| if (blk->dev_ops && blk->dev_ops->is_tray_open) { |
| return blk->dev_ops->is_tray_open(blk->dev_opaque); |
| } |
| return false; |
| } |
| |
| /* |
| * Does @blk's attached device model have the medium locked? |
| * %false if the device model has no such lock. |
| */ |
| bool blk_dev_is_medium_locked(BlockBackend *blk) |
| { |
| if (blk->dev_ops && blk->dev_ops->is_medium_locked) { |
| return blk->dev_ops->is_medium_locked(blk->dev_opaque); |
| } |
| return false; |
| } |
| |
| /* |
| * Notify @blk's attached device model of a backend size change. |
| */ |
| void blk_dev_resize_cb(BlockBackend *blk) |
| { |
| if (blk->dev_ops && blk->dev_ops->resize_cb) { |
| blk->dev_ops->resize_cb(blk->dev_opaque); |
| } |
| } |
| |
| void blk_iostatus_enable(BlockBackend *blk) |
| { |
| bdrv_iostatus_enable(blk->bs); |
| } |
| |
| static int blk_check_byte_request(BlockBackend *blk, int64_t offset, |
| size_t size) |
| { |
| int64_t len; |
| |
| if (size > INT_MAX) { |
| return -EIO; |
| } |
| |
| if (!blk_is_inserted(blk)) { |
| return -ENOMEDIUM; |
| } |
| |
| len = blk_getlength(blk); |
| if (len < 0) { |
| return len; |
| } |
| |
| if (offset < 0) { |
| return -EIO; |
| } |
| |
| if (offset > len || len - offset < size) { |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int blk_check_request(BlockBackend *blk, int64_t sector_num, |
| int nb_sectors) |
| { |
| if (sector_num < 0 || sector_num > INT64_MAX / BDRV_SECTOR_SIZE) { |
| return -EIO; |
| } |
| |
| if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) { |
| return -EIO; |
| } |
| |
| return blk_check_byte_request(blk, sector_num * BDRV_SECTOR_SIZE, |
| nb_sectors * BDRV_SECTOR_SIZE); |
| } |
| |
| int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf, |
| int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_read(blk->bs, sector_num, buf, nb_sectors); |
| } |
| |
| int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, |
| int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_read_unthrottled(blk->bs, sector_num, buf, nb_sectors); |
| } |
| |
| int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, |
| int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_write(blk->bs, sector_num, buf, nb_sectors); |
| } |
| |
| static void error_callback_bh(void *opaque) |
| { |
| struct BlockBackendAIOCB *acb = opaque; |
| qemu_bh_delete(acb->bh); |
| acb->common.cb(acb->common.opaque, acb->ret); |
| qemu_aio_unref(acb); |
| } |
| |
| static BlockAIOCB *abort_aio_request(BlockBackend *blk, BlockCompletionFunc *cb, |
| void *opaque, int ret) |
| { |
| struct BlockBackendAIOCB *acb; |
| QEMUBH *bh; |
| |
| acb = blk_aio_get(&block_backend_aiocb_info, blk, cb, opaque); |
| acb->ret = ret; |
| |
| bh = aio_bh_new(blk_get_aio_context(blk), error_callback_bh, acb); |
| acb->bh = bh; |
| qemu_bh_schedule(bh); |
| |
| return &acb->common; |
| } |
| |
| BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, |
| int nb_sectors, BdrvRequestFlags flags, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return abort_aio_request(blk, cb, opaque, ret); |
| } |
| |
| return bdrv_aio_write_zeroes(blk->bs, sector_num, nb_sectors, flags, |
| cb, opaque); |
| } |
| |
| int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count) |
| { |
| int ret = blk_check_byte_request(blk, offset, count); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_pread(blk->bs, offset, buf, count); |
| } |
| |
| int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count) |
| { |
| int ret = blk_check_byte_request(blk, offset, count); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_pwrite(blk->bs, offset, buf, count); |
| } |
| |
| int64_t blk_getlength(BlockBackend *blk) |
| { |
| return bdrv_getlength(blk->bs); |
| } |
| |
| void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr) |
| { |
| bdrv_get_geometry(blk->bs, nb_sectors_ptr); |
| } |
| |
| int64_t blk_nb_sectors(BlockBackend *blk) |
| { |
| return bdrv_nb_sectors(blk->bs); |
| } |
| |
| BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num, |
| QEMUIOVector *iov, int nb_sectors, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return abort_aio_request(blk, cb, opaque, ret); |
| } |
| |
| return bdrv_aio_readv(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
| } |
| |
| BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num, |
| QEMUIOVector *iov, int nb_sectors, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return abort_aio_request(blk, cb, opaque, ret); |
| } |
| |
| return bdrv_aio_writev(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
| } |
| |
| BlockAIOCB *blk_aio_flush(BlockBackend *blk, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| return bdrv_aio_flush(blk->bs, cb, opaque); |
| } |
| |
| BlockAIOCB *blk_aio_discard(BlockBackend *blk, |
| int64_t sector_num, int nb_sectors, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return abort_aio_request(blk, cb, opaque, ret); |
| } |
| |
| return bdrv_aio_discard(blk->bs, sector_num, nb_sectors, cb, opaque); |
| } |
| |
| void blk_aio_cancel(BlockAIOCB *acb) |
| { |
| bdrv_aio_cancel(acb); |
| } |
| |
| void blk_aio_cancel_async(BlockAIOCB *acb) |
| { |
| bdrv_aio_cancel_async(acb); |
| } |
| |
| int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs) |
| { |
| int i, ret; |
| |
| for (i = 0; i < num_reqs; i++) { |
| ret = blk_check_request(blk, reqs[i].sector, reqs[i].nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| } |
| |
| return bdrv_aio_multiwrite(blk->bs, reqs, num_reqs); |
| } |
| |
| int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf) |
| { |
| return bdrv_ioctl(blk->bs, req, buf); |
| } |
| |
| BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| return bdrv_aio_ioctl(blk->bs, req, buf, cb, opaque); |
| } |
| |
| int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_co_discard(blk->bs, sector_num, nb_sectors); |
| } |
| |
| int blk_co_flush(BlockBackend *blk) |
| { |
| return bdrv_co_flush(blk->bs); |
| } |
| |
| int blk_flush(BlockBackend *blk) |
| { |
| return bdrv_flush(blk->bs); |
| } |
| |
| int blk_flush_all(void) |
| { |
| return bdrv_flush_all(); |
| } |
| |
| void blk_drain_all(void) |
| { |
| bdrv_drain_all(); |
| } |
| |
| BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read) |
| { |
| return bdrv_get_on_error(blk->bs, is_read); |
| } |
| |
| BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read, |
| int error) |
| { |
| return bdrv_get_error_action(blk->bs, is_read, error); |
| } |
| |
| void blk_error_action(BlockBackend *blk, BlockErrorAction action, |
| bool is_read, int error) |
| { |
| bdrv_error_action(blk->bs, action, is_read, error); |
| } |
| |
| int blk_is_read_only(BlockBackend *blk) |
| { |
| return bdrv_is_read_only(blk->bs); |
| } |
| |
| int blk_is_sg(BlockBackend *blk) |
| { |
| return bdrv_is_sg(blk->bs); |
| } |
| |
| int blk_enable_write_cache(BlockBackend *blk) |
| { |
| return bdrv_enable_write_cache(blk->bs); |
| } |
| |
| void blk_set_enable_write_cache(BlockBackend *blk, bool wce) |
| { |
| bdrv_set_enable_write_cache(blk->bs, wce); |
| } |
| |
| void blk_invalidate_cache(BlockBackend *blk, Error **errp) |
| { |
| bdrv_invalidate_cache(blk->bs, errp); |
| } |
| |
| int blk_is_inserted(BlockBackend *blk) |
| { |
| return bdrv_is_inserted(blk->bs); |
| } |
| |
| void blk_lock_medium(BlockBackend *blk, bool locked) |
| { |
| bdrv_lock_medium(blk->bs, locked); |
| } |
| |
| void blk_eject(BlockBackend *blk, bool eject_flag) |
| { |
| bdrv_eject(blk->bs, eject_flag); |
| } |
| |
| int blk_get_flags(BlockBackend *blk) |
| { |
| return bdrv_get_flags(blk->bs); |
| } |
| |
| int blk_get_max_transfer_length(BlockBackend *blk) |
| { |
| return blk->bs->bl.max_transfer_length; |
| } |
| |
| void blk_set_guest_block_size(BlockBackend *blk, int align) |
| { |
| bdrv_set_guest_block_size(blk->bs, align); |
| } |
| |
| void *blk_blockalign(BlockBackend *blk, size_t size) |
| { |
| return qemu_blockalign(blk ? blk->bs : NULL, size); |
| } |
| |
| bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp) |
| { |
| return bdrv_op_is_blocked(blk->bs, op, errp); |
| } |
| |
| void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason) |
| { |
| bdrv_op_unblock(blk->bs, op, reason); |
| } |
| |
| void blk_op_block_all(BlockBackend *blk, Error *reason) |
| { |
| bdrv_op_block_all(blk->bs, reason); |
| } |
| |
| void blk_op_unblock_all(BlockBackend *blk, Error *reason) |
| { |
| bdrv_op_unblock_all(blk->bs, reason); |
| } |
| |
| AioContext *blk_get_aio_context(BlockBackend *blk) |
| { |
| return bdrv_get_aio_context(blk->bs); |
| } |
| |
| void blk_set_aio_context(BlockBackend *blk, AioContext *new_context) |
| { |
| bdrv_set_aio_context(blk->bs, new_context); |
| } |
| |
| void blk_add_aio_context_notifier(BlockBackend *blk, |
| void (*attached_aio_context)(AioContext *new_context, void *opaque), |
| void (*detach_aio_context)(void *opaque), void *opaque) |
| { |
| bdrv_add_aio_context_notifier(blk->bs, attached_aio_context, |
| detach_aio_context, opaque); |
| } |
| |
| void blk_remove_aio_context_notifier(BlockBackend *blk, |
| void (*attached_aio_context)(AioContext *, |
| void *), |
| void (*detach_aio_context)(void *), |
| void *opaque) |
| { |
| bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context, |
| detach_aio_context, opaque); |
| } |
| |
| void blk_add_close_notifier(BlockBackend *blk, Notifier *notify) |
| { |
| bdrv_add_close_notifier(blk->bs, notify); |
| } |
| |
| void blk_io_plug(BlockBackend *blk) |
| { |
| bdrv_io_plug(blk->bs); |
| } |
| |
| void blk_io_unplug(BlockBackend *blk) |
| { |
| bdrv_io_unplug(blk->bs); |
| } |
| |
| BlockAcctStats *blk_get_stats(BlockBackend *blk) |
| { |
| return bdrv_get_stats(blk->bs); |
| } |
| |
| void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk, |
| BlockCompletionFunc *cb, void *opaque) |
| { |
| return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque); |
| } |
| |
| int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num, |
| int nb_sectors, BdrvRequestFlags flags) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_co_write_zeroes(blk->bs, sector_num, nb_sectors, flags); |
| } |
| |
| int blk_write_compressed(BlockBackend *blk, int64_t sector_num, |
| const uint8_t *buf, int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_write_compressed(blk->bs, sector_num, buf, nb_sectors); |
| } |
| |
| int blk_truncate(BlockBackend *blk, int64_t offset) |
| { |
| return bdrv_truncate(blk->bs, offset); |
| } |
| |
| int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) |
| { |
| int ret = blk_check_request(blk, sector_num, nb_sectors); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| return bdrv_discard(blk->bs, sector_num, nb_sectors); |
| } |
| |
| int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, |
| int64_t pos, int size) |
| { |
| return bdrv_save_vmstate(blk->bs, buf, pos, size); |
| } |
| |
| int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size) |
| { |
| return bdrv_load_vmstate(blk->bs, buf, pos, size); |
| } |
| |
| int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz) |
| { |
| return bdrv_probe_blocksizes(blk->bs, bsz); |
| } |
| |
| int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo) |
| { |
| return bdrv_probe_geometry(blk->bs, geo); |
| } |