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Block layer patches

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

Block layer patches

# gpg: Signature made Fri 23 Oct 2015 17:59:56 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream: (37 commits)
  tests: Add test case for aio_disable_external
  block: Add "drained begin/end" for internal snapshot
  block: Add "drained begin/end" for transactional blockdev-backup
  block: Add "drained begin/end" for transactional backup
  block: Add "drained begin/end" for transactional external snapshot
  block: Introduce "drained begin/end" API
  aio: introduce aio_{disable,enable}_external
  dataplane: Mark host notifiers' client type as "external"
  nbd: Mark fd handlers client type as "external"
  aio: Add "is_external" flag for event handlers
  throttle: Remove throttle_group_lock/unlock()
  blockdev: Allow more options for BB-less BDS tree
  blockdev: Pull out blockdev option extraction
  blockdev: Do not create BDS for empty drive
  block: Prepare for NULL BDS
  block: Add blk_insert_bs()
  block: Prepare remaining BB functions for NULL BDS
  block: Fail requests to empty BlockBackend
  block: Make some BB functions fall back to BBRS
  block: Add BlockBackendRootState
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-10-23 18:14:42 +01:00
parent bc79082e4c c07bc2c165
commit af25e7277d
52 changed files with 1268 additions and 872 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
aio-posix.c
View file

@ -25,6 +25,7 @@ struct AioHandler
IOHandler *io_write;
int deleted;
void *opaque;
bool is_external;
QLIST_ENTRY(AioHandler) node;
};
@ -43,6 +44,7 @@ static AioHandler *find_aio_handler(AioContext *ctx, int fd)
void aio_set_fd_handler(AioContext *ctx,
int fd,
bool is_external,
IOHandler *io_read,
IOHandler *io_write,
void *opaque)
@ -82,6 +84,7 @@ void aio_set_fd_handler(AioContext *ctx,
node->io_read = io_read;
node->io_write = io_write;
node->opaque = opaque;
node->is_external = is_external;
node->pfd.events = (io_read ? G_IO_IN | G_IO_HUP | G_IO_ERR : 0);
node->pfd.events |= (io_write ? G_IO_OUT | G_IO_ERR : 0);
@ -92,10 +95,11 @@ void aio_set_fd_handler(AioContext *ctx,
void aio_set_event_notifier(AioContext *ctx,
EventNotifier *notifier,
bool is_external,
EventNotifierHandler *io_read)
{
aio_set_fd_handler(ctx, event_notifier_get_fd(notifier),
(IOHandler *)io_read, NULL, notifier);
is_external, (IOHandler *)io_read, NULL, notifier);
}
bool aio_prepare(AioContext *ctx)
@ -257,7 +261,8 @@ bool aio_poll(AioContext *ctx, bool blocking)
/* fill pollfds */
QLIST_FOREACH(node, &ctx->aio_handlers, node) {
if (!node->deleted && node->pfd.events) {
if (!node->deleted && node->pfd.events
&& aio_node_check(ctx, node->is_external)) {
add_pollfd(node);
}
}

8
aio-win32.c
View file

@ -28,11 +28,13 @@ struct AioHandler {
GPollFD pfd;
int deleted;
void *opaque;
bool is_external;
QLIST_ENTRY(AioHandler) node;
};
void aio_set_fd_handler(AioContext *ctx,
int fd,
bool is_external,
IOHandler *io_read,
IOHandler *io_write,
void *opaque)
@ -86,6 +88,7 @@ void aio_set_fd_handler(AioContext *ctx,
node->opaque = opaque;
node->io_read = io_read;
node->io_write = io_write;
node->is_external = is_external;
event = event_notifier_get_handle(&ctx->notifier);
WSAEventSelect(node->pfd.fd, event,
@ -98,6 +101,7 @@ void aio_set_fd_handler(AioContext *ctx,
void aio_set_event_notifier(AioContext *ctx,
EventNotifier *e,
bool is_external,
EventNotifierHandler *io_notify)
{
AioHandler *node;
@ -133,6 +137,7 @@ void aio_set_event_notifier(AioContext *ctx,
node->e = e;
node->pfd.fd = (uintptr_t)event_notifier_get_handle(e);
node->pfd.events = G_IO_IN;
node->is_external = is_external;
QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node);
g_source_add_poll(&ctx->source, &node->pfd);
@ -304,7 +309,8 @@ bool aio_poll(AioContext *ctx, bool blocking)
/* fill fd sets */
count = 0;
QLIST_FOREACH(node, &ctx->aio_handlers, node) {
if (!node->deleted && node->io_notify) {
if (!node->deleted && node->io_notify
&& aio_node_check(ctx, node->is_external)) {
events[count++] = event_notifier_get_handle(node->e);
}
}

3
async.c
View file

@ -247,7 +247,7 @@ aio_ctx_finalize(GSource *source)
}
qemu_mutex_unlock(&ctx->bh_lock);
aio_set_event_notifier(ctx, &ctx->notifier, NULL);
aio_set_event_notifier(ctx, &ctx->notifier, false, NULL);
event_notifier_cleanup(&ctx->notifier);
rfifolock_destroy(&ctx->lock);
qemu_mutex_destroy(&ctx->bh_lock);
@ -329,6 +329,7 @@ AioContext *aio_context_new(Error **errp)
}
g_source_set_can_recurse(&ctx->source, true);
aio_set_event_notifier(ctx, &ctx->notifier,
false,
(EventNotifierHandler *)
event_notifier_dummy_cb);
ctx->thread_pool = NULL;

180
block.c
View file

@ -257,7 +257,6 @@ BlockDriverState *bdrv_new(void)
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
QLIST_INIT(&bs->op_blockers[i]);
}
bdrv_iostatus_disable(bs);
notifier_list_init(&bs->close_notifiers);
notifier_with_return_list_init(&bs->before_write_notifiers);
qemu_co_queue_init(&bs->throttled_reqs[0]);
@ -857,7 +856,6 @@ static int bdrv_open_common(BlockDriverState *bs, BdrvChild *file,
goto fail_opts;
}
bs->guest_block_size = 512;
bs->request_alignment = 512;
bs->zero_beyond_eof = true;
open_flags = bdrv_open_flags(bs, flags);
@ -1081,6 +1079,10 @@ static int bdrv_fill_options(QDict **options, const char **pfilename,
}
}
if (runstate_check(RUN_STATE_INMIGRATE)) {
*flags |= BDRV_O_INCOMING;
}
return 0;
}
@ -1908,6 +1910,10 @@ void bdrv_close(BlockDriverState *bs)
bdrv_drain(bs); /* in case flush left pending I/O */
notifier_list_notify(&bs->close_notifiers, bs);
if (bs->blk) {
blk_dev_change_media_cb(bs->blk, false);
}
if (bs->drv) {
BdrvChild *child, *next;
@ -1946,10 +1952,6 @@ void bdrv_close(BlockDriverState *bs)
bs->full_open_options = NULL;
}
if (bs->blk) {
blk_dev_change_media_cb(bs->blk, false);
}
QLIST_FOREACH_SAFE(ban, &bs->aio_notifiers, list, ban_next) {
g_free(ban);
}
@ -1998,19 +2000,10 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
/* move some fields that need to stay attached to the device */
/* dev info */
bs_dest->guest_block_size = bs_src->guest_block_size;
bs_dest->copy_on_read = bs_src->copy_on_read;
bs_dest->enable_write_cache = bs_src->enable_write_cache;
/* r/w error */
bs_dest->on_read_error = bs_src->on_read_error;
bs_dest->on_write_error = bs_src->on_write_error;
/* i/o status */
bs_dest->iostatus_enabled = bs_src->iostatus_enabled;
bs_dest->iostatus = bs_src->iostatus;
/* dirty bitmap */
bs_dest->dirty_bitmaps = bs_src->dirty_bitmaps;
}
@ -2497,82 +2490,6 @@ void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
*nb_sectors_ptr = nb_sectors < 0 ? 0 : nb_sectors;
}
void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
BlockdevOnError on_write_error)
{
bs->on_read_error = on_read_error;
bs->on_write_error = on_write_error;
}
BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read)
{
return is_read ? bs->on_read_error : bs->on_write_error;
}
BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error)
{
BlockdevOnError on_err = is_read ? bs->on_read_error : bs->on_write_error;
switch (on_err) {
case BLOCKDEV_ON_ERROR_ENOSPC:
return (error == ENOSPC) ?
BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT;
case BLOCKDEV_ON_ERROR_STOP:
return BLOCK_ERROR_ACTION_STOP;
case BLOCKDEV_ON_ERROR_REPORT:
return BLOCK_ERROR_ACTION_REPORT;
case BLOCKDEV_ON_ERROR_IGNORE:
return BLOCK_ERROR_ACTION_IGNORE;
default:
abort();
}
}
static void send_qmp_error_event(BlockDriverState *bs,
BlockErrorAction action,
bool is_read, int error)
{
IoOperationType optype;
optype = is_read ? IO_OPERATION_TYPE_READ : IO_OPERATION_TYPE_WRITE;
qapi_event_send_block_io_error(bdrv_get_device_name(bs), optype, action,
bdrv_iostatus_is_enabled(bs),
error == ENOSPC, strerror(error),
&error_abort);
}
/* This is done by device models because, while the block layer knows
* about the error, it does not know whether an operation comes from
* the device or the block layer (from a job, for example).
*/
void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,
bool is_read, int error)
{
assert(error >= 0);
if (action == BLOCK_ERROR_ACTION_STOP) {
/* First set the iostatus, so that "info block" returns an iostatus
* that matches the events raised so far (an additional error iostatus
* is fine, but not a lost one).
*/
bdrv_iostatus_set_err(bs, error);
/* Then raise the request to stop the VM and the event.
* qemu_system_vmstop_request_prepare has two effects. First,
* it ensures that the STOP event always comes after the
* BLOCK_IO_ERROR event. Second, it ensures that even if management
* can observe the STOP event and do a "cont" before the STOP
* event is issued, the VM will not stop. In this case, vm_start()
* also ensures that the STOP/RESUME pair of events is emitted.
*/
qemu_system_vmstop_request_prepare();
send_qmp_error_event(bs, action, is_read, error);
qemu_system_vmstop_request(RUN_STATE_IO_ERROR);
} else {
send_qmp_error_event(bs, action, is_read, error);
}
}
int bdrv_is_read_only(BlockDriverState *bs)
{
return bs->read_only;
@ -2766,6 +2683,11 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
blk = blk_by_name(device);
if (blk) {
if (!blk_bs(blk)) {
error_setg(errp, "Device '%s' has no medium", device);
return NULL;
}
return blk_bs(blk);
}
}
@ -3136,15 +3058,23 @@ void bdrv_invalidate_cache_all(Error **errp)
/**
* Return TRUE if the media is present
*/
int bdrv_is_inserted(BlockDriverState *bs)
bool bdrv_is_inserted(BlockDriverState *bs)
{
BlockDriver *drv = bs->drv;
BdrvChild *child;
if (!drv)
return 0;
if (!drv->bdrv_is_inserted)
return 1;
return drv->bdrv_is_inserted(bs);
if (!drv) {
return false;
}
if (drv->bdrv_is_inserted) {
return drv->bdrv_is_inserted(bs);
}
QLIST_FOREACH(child, &bs->children, next) {
if (!bdrv_is_inserted(child->bs)) {
return false;
}
}
return true;
}
/**
@ -3195,11 +3125,6 @@ void bdrv_lock_medium(BlockDriverState *bs, bool locked)
}
}
void bdrv_set_guest_block_size(BlockDriverState *bs, int align)
{
bs->guest_block_size = align;
}
BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name)
{
BdrvDirtyBitmap *bm;
@ -3597,46 +3522,6 @@ bool bdrv_op_blocker_is_empty(BlockDriverState *bs)
return true;
}
void bdrv_iostatus_enable(BlockDriverState *bs)
{
bs->iostatus_enabled = true;
bs->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
}
/* The I/O status is only enabled if the drive explicitly
* enables it _and_ the VM is configured to stop on errors */
bool bdrv_iostatus_is_enabled(const BlockDriverState *bs)
{
return (bs->iostatus_enabled &&
(bs->on_write_error == BLOCKDEV_ON_ERROR_ENOSPC ||
bs->on_write_error == BLOCKDEV_ON_ERROR_STOP ||
bs->on_read_error == BLOCKDEV_ON_ERROR_STOP));
}
void bdrv_iostatus_disable(BlockDriverState *bs)
{
bs->iostatus_enabled = false;
}
void bdrv_iostatus_reset(BlockDriverState *bs)
{
if (bdrv_iostatus_is_enabled(bs)) {
bs->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
if (bs->job) {
block_job_iostatus_reset(bs->job);
}
}
}
void bdrv_iostatus_set_err(BlockDriverState *bs, int error)
{
assert(bdrv_iostatus_is_enabled(bs));
if (bs->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
bs->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
BLOCK_DEVICE_IO_STATUS_FAILED;
}
}
void bdrv_img_create(const char *filename, const char *fmt,
const char *base_filename, const char *base_fmt,
char *options, uint64_t img_size, int flags,
@ -4148,14 +4033,3 @@ void bdrv_refresh_filename(BlockDriverState *bs)
QDECREF(json);
}
}
/* This accessor function purpose is to allow the device models to access the
* BlockAcctStats structure embedded inside a BlockDriverState without being
* aware of the BlockDriverState structure layout.
* It will go away when the BlockAcctStats structure will be moved inside
* the device models.
*/
BlockAcctStats *bdrv_get_stats(BlockDriverState *bs)
{
return &bs->stats;
}

8
block/accounting.c
View file

@ -47,14 +47,6 @@ void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie)
}
void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
unsigned int nb_sectors)
{
if (stats->wr_highest_sector < sector_num + nb_sectors - 1) {
stats->wr_highest_sector = sector_num + nb_sectors - 1;
}
}
void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
int num_requests)
{

17
block/backup.c
View file

@ -21,6 +21,7 @@
#include "block/blockjob.h"
#include "qapi/qmp/qerror.h"
#include "qemu/ratelimit.h"
#include "sysemu/block-backend.h"
#define BACKUP_CLUSTER_BITS 16
#define BACKUP_CLUSTER_SIZE (1 << BACKUP_CLUSTER_BITS)
@ -215,7 +216,9 @@ static void backup_iostatus_reset(BlockJob *job)
{
BackupBlockJob *s = container_of(job, BackupBlockJob, common);
bdrv_iostatus_reset(s->target);
if (s->target->blk) {
blk_iostatus_reset(s->target->blk);
}
}
static const BlockJobDriver backup_job_driver = {
@ -360,8 +363,10 @@ static void coroutine_fn backup_run(void *opaque)
job->bitmap = hbitmap_alloc(end, 0);
bdrv_set_enable_write_cache(target, true);
bdrv_set_on_error(target, on_target_error, on_target_error);
bdrv_iostatus_enable(target);
if (target->blk) {
blk_set_on_error(target->blk, on_target_error, on_target_error);
blk_iostatus_enable(target->blk);
}
bdrv_add_before_write_notifier(bs, &before_write);
@ -451,7 +456,9 @@ static void coroutine_fn backup_run(void *opaque)
}
hbitmap_free(job->bitmap);
bdrv_iostatus_disable(target);
if (target->blk) {
blk_iostatus_disable(target->blk);
}
bdrv_op_unblock_all(target, job->common.blocker);
data = g_malloc(sizeof(*data));
@ -480,7 +487,7 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target,
if ((on_source_error == BLOCKDEV_ON_ERROR_STOP ||
on_source_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
!bdrv_iostatus_is_enabled(bs)) {
(!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
error_setg(errp, QERR_INVALID_PARAMETER, "on-source-error");
return;
}

360
block/block-backend.c
View file

@ -12,12 +12,17 @@
#include "sysemu/block-backend.h"
#include "block/block_int.h"
#include "block/blockjob.h"
#include "block/throttle-groups.h"
#include "sysemu/blockdev.h"
#include "sysemu/sysemu.h"
#include "qapi-event.h"
/* Number of coroutines to reserve per attached device model */
#define COROUTINE_POOL_RESERVATION 64
static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb);
struct BlockBackend {
char *name;
int refcnt;
@ -29,15 +34,31 @@ struct BlockBackend {
/* TODO change to DeviceState when all users are qdevified */
const BlockDevOps *dev_ops;
void *dev_opaque;
/* the block size for which the guest device expects atomicity */
int guest_block_size;
/* If the BDS tree is removed, some of its options are stored here (which
* can be used to restore those options in the new BDS on insert) */
BlockBackendRootState root_state;
/* I/O stats (display with "info blockstats"). */
BlockAcctStats stats;
BlockdevOnError on_read_error, on_write_error;
bool iostatus_enabled;
BlockDeviceIoStatus iostatus;
};
typedef struct BlockBackendAIOCB {
BlockAIOCB common;
QEMUBH *bh;
BlockBackend *blk;
int ret;
} BlockBackendAIOCB;
static const AIOCBInfo block_backend_aiocb_info = {
.get_aio_context = blk_aiocb_get_aio_context,
.aiocb_size = sizeof(BlockBackendAIOCB),
};
@ -145,6 +166,10 @@ static void blk_delete(BlockBackend *blk)
bdrv_unref(blk->bs);
blk->bs = NULL;
}
if (blk->root_state.throttle_state) {
g_free(blk->root_state.throttle_group);
throttle_group_unref(blk->root_state.throttle_state);
}
/* Avoid double-remove after blk_hide_on_behalf_of_hmp_drive_del() */
if (blk->name[0]) {
QTAILQ_REMOVE(&blk_backends, blk, link);
@ -308,6 +333,17 @@ void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk)
}
}
/*
* Associates a new BlockDriverState with @blk.
*/
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
{
assert(!blk->bs && !bs->blk);
bdrv_ref(bs);
blk->bs = bs;
bs->blk = blk;
}
/*
* Attach device model @dev to @blk.
* Return 0 on success, -EBUSY when a device model is attached already.
@ -320,7 +356,7 @@ int blk_attach_dev(BlockBackend *blk, void *dev)
}
blk_ref(blk);
blk->dev = dev;
bdrv_iostatus_reset(blk->bs);
blk_iostatus_reset(blk);
return 0;
}
@ -347,7 +383,7 @@ void blk_detach_dev(BlockBackend *blk, void *dev)
blk->dev = NULL;
blk->dev_ops = NULL;
blk->dev_opaque = NULL;
bdrv_set_guest_block_size(blk->bs, 512);
blk->guest_block_size = 512;
blk_unref(blk);
}
@ -452,7 +488,47 @@ void blk_dev_resize_cb(BlockBackend *blk)
void blk_iostatus_enable(BlockBackend *blk)
{
bdrv_iostatus_enable(blk->bs);
blk->iostatus_enabled = true;
blk->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
}
/* The I/O status is only enabled if the drive explicitly
* enables it _and_ the VM is configured to stop on errors */
bool blk_iostatus_is_enabled(const BlockBackend *blk)
{
return (blk->iostatus_enabled &&
(blk->on_write_error == BLOCKDEV_ON_ERROR_ENOSPC ||
blk->on_write_error == BLOCKDEV_ON_ERROR_STOP ||
blk->on_read_error == BLOCKDEV_ON_ERROR_STOP));
}
BlockDeviceIoStatus blk_iostatus(const BlockBackend *blk)
{
return blk->iostatus;
}
void blk_iostatus_disable(BlockBackend *blk)
{
blk->iostatus_enabled = false;
}
void blk_iostatus_reset(BlockBackend *blk)
{
if (blk_iostatus_is_enabled(blk)) {
blk->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
if (blk->bs && blk->bs->job) {
block_job_iostatus_reset(blk->bs->job);
}
}
}
void blk_iostatus_set_err(BlockBackend *blk, int error)
{
assert(blk_iostatus_is_enabled(blk));
if (blk->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
blk->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
BLOCK_DEVICE_IO_STATUS_FAILED;
}
}
static int blk_check_byte_request(BlockBackend *blk, int64_t offset,
@ -464,7 +540,7 @@ static int blk_check_byte_request(BlockBackend *blk, int64_t offset,
return -EIO;
}
if (!blk_is_inserted(blk)) {
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
@ -558,6 +634,7 @@ static BlockAIOCB *abort_aio_request(BlockBackend *blk, BlockCompletionFunc *cb,
QEMUBH *bh;
acb = blk_aio_get(&block_backend_aiocb_info, blk, cb, opaque);
acb->blk = blk;
acb->ret = ret;
bh = aio_bh_new(blk_get_aio_context(blk), error_callback_bh, acb);
@ -602,16 +679,28 @@ int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count)
int64_t blk_getlength(BlockBackend *blk)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_getlength(blk->bs);
}
void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr)
{
bdrv_get_geometry(blk->bs, nb_sectors_ptr);
if (!blk->bs) {
*nb_sectors_ptr = 0;
} else {
bdrv_get_geometry(blk->bs, nb_sectors_ptr);
}
}
int64_t blk_nb_sectors(BlockBackend *blk)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_nb_sectors(blk->bs);
}
@ -642,6 +731,10 @@ BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num,
BlockAIOCB *blk_aio_flush(BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque)
{
if (!blk_is_available(blk)) {
return abort_aio_request(blk, cb, opaque, -ENOMEDIUM);
}
return bdrv_aio_flush(blk->bs, cb, opaque);
}
@ -683,12 +776,20 @@ int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs)
int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_ioctl(blk->bs, req, buf);
}
BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
BlockCompletionFunc *cb, void *opaque)
{
if (!blk_is_available(blk)) {
return abort_aio_request(blk, cb, opaque, -ENOMEDIUM);
}
return bdrv_aio_ioctl(blk->bs, req, buf, cb, opaque);
}
@ -704,11 +805,19 @@ int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors)
int blk_co_flush(BlockBackend *blk)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_co_flush(blk->bs);
}
int blk_flush(BlockBackend *blk)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_flush(blk->bs);
}
@ -719,7 +828,9 @@ int blk_flush_all(void)
void blk_drain(BlockBackend *blk)
{
bdrv_drain(blk->bs);
if (blk->bs) {
bdrv_drain(blk->bs);
}
}
void blk_drain_all(void)
@ -727,76 +838,178 @@ void blk_drain_all(void)
bdrv_drain_all();
}
void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
BlockdevOnError on_write_error)
{
blk->on_read_error = on_read_error;
blk->on_write_error = on_write_error;
}
BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read)
{
return bdrv_get_on_error(blk->bs, is_read);
return is_read ? blk->on_read_error : blk->on_write_error;
}
BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
int error)
{
return bdrv_get_error_action(blk->bs, is_read, error);
BlockdevOnError on_err = blk_get_on_error(blk, is_read);
switch (on_err) {
case BLOCKDEV_ON_ERROR_ENOSPC:
return (error == ENOSPC) ?
BLOCK_ERROR_ACTION_STOP : BLOCK_ERROR_ACTION_REPORT;
case BLOCKDEV_ON_ERROR_STOP:
return BLOCK_ERROR_ACTION_STOP;
case BLOCKDEV_ON_ERROR_REPORT:
return BLOCK_ERROR_ACTION_REPORT;
case BLOCKDEV_ON_ERROR_IGNORE:
return BLOCK_ERROR_ACTION_IGNORE;
default:
abort();
}
}
static void send_qmp_error_event(BlockBackend *blk,
BlockErrorAction action,
bool is_read, int error)
{
IoOperationType optype;
optype = is_read ? IO_OPERATION_TYPE_READ : IO_OPERATION_TYPE_WRITE;
qapi_event_send_block_io_error(blk_name(blk), optype, action,
blk_iostatus_is_enabled(blk),
error == ENOSPC, strerror(error),
&error_abort);
}
/* This is done by device models because, while the block layer knows
* about the error, it does not know whether an operation comes from
* the device or the block layer (from a job, for example).
*/
void blk_error_action(BlockBackend *blk, BlockErrorAction action,
bool is_read, int error)
{
bdrv_error_action(blk->bs, action, is_read, error);
assert(error >= 0);
if (action == BLOCK_ERROR_ACTION_STOP) {
/* First set the iostatus, so that "info block" returns an iostatus
* that matches the events raised so far (an additional error iostatus
* is fine, but not a lost one).
*/
blk_iostatus_set_err(blk, error);
/* Then raise the request to stop the VM and the event.
* qemu_system_vmstop_request_prepare has two effects. First,
* it ensures that the STOP event always comes after the
* BLOCK_IO_ERROR event. Second, it ensures that even if management
* can observe the STOP event and do a "cont" before the STOP
* event is issued, the VM will not stop. In this case, vm_start()
* also ensures that the STOP/RESUME pair of events is emitted.
*/
qemu_system_vmstop_request_prepare();
send_qmp_error_event(blk, action, is_read, error);
qemu_system_vmstop_request(RUN_STATE_IO_ERROR);
} else {
send_qmp_error_event(blk, action, is_read, error);
}
}
int blk_is_read_only(BlockBackend *blk)
{
return bdrv_is_read_only(blk->bs);
if (blk->bs) {
return bdrv_is_read_only(blk->bs);
} else {
return blk->root_state.read_only;
}
}
int blk_is_sg(BlockBackend *blk)
{
if (!blk->bs) {
return 0;
}
return bdrv_is_sg(blk->bs);
}
int blk_enable_write_cache(BlockBackend *blk)
{
return bdrv_enable_write_cache(blk->bs);
if (blk->bs) {
return bdrv_enable_write_cache(blk->bs);
} else {
return !!(blk->root_state.open_flags & BDRV_O_CACHE_WB);
}
}
void blk_set_enable_write_cache(BlockBackend *blk, bool wce)
{
bdrv_set_enable_write_cache(blk->bs, wce);
if (blk->bs) {
bdrv_set_enable_write_cache(blk->bs, wce);
} else {
if (wce) {
blk->root_state.open_flags |= BDRV_O_CACHE_WB;
} else {
blk->root_state.open_flags &= ~BDRV_O_CACHE_WB;
}
}
}
void blk_invalidate_cache(BlockBackend *blk, Error **errp)
{
if (!blk->bs) {
error_setg(errp, "Device '%s' has no medium", blk->name);
return;
}
bdrv_invalidate_cache(blk->bs, errp);
}
int blk_is_inserted(BlockBackend *blk)
bool blk_is_inserted(BlockBackend *blk)
{
return bdrv_is_inserted(blk->bs);
return blk->bs && bdrv_is_inserted(blk->bs);
}
bool blk_is_available(BlockBackend *blk)
{
return blk_is_inserted(blk) && !blk_dev_is_tray_open(blk);
}
void blk_lock_medium(BlockBackend *blk, bool locked)
{
bdrv_lock_medium(blk->bs, locked);
if (blk->bs) {
bdrv_lock_medium(blk->bs, locked);
}
}
void blk_eject(BlockBackend *blk, bool eject_flag)
{
bdrv_eject(blk->bs, eject_flag);
if (blk->bs) {
bdrv_eject(blk->bs, eject_flag);
}
}
int blk_get_flags(BlockBackend *blk)
{
return bdrv_get_flags(blk->bs);
if (blk->bs) {
return bdrv_get_flags(blk->bs);
} else {
return blk->root_state.open_flags;
}
}
int blk_get_max_transfer_length(BlockBackend *blk)
{
return blk->bs->bl.max_transfer_length;
if (blk->bs) {
return blk->bs->bl.max_transfer_length;
} else {
return 0;
}
}
void blk_set_guest_block_size(BlockBackend *blk, int align)
{
bdrv_set_guest_block_size(blk->bs, align);
blk->guest_block_size = align;
}
void *blk_blockalign(BlockBackend *blk, size_t size)
@ -806,40 +1019,64 @@ void *blk_blockalign(BlockBackend *blk, size_t size)
bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp)
{
if (!blk->bs) {
return false;
}
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);
if (blk->bs) {
bdrv_op_unblock(blk->bs, op, reason);
}
}
void blk_op_block_all(BlockBackend *blk, Error *reason)
{
bdrv_op_block_all(blk->bs, reason);
if (blk->bs) {
bdrv_op_block_all(blk->bs, reason);
}
}
void blk_op_unblock_all(BlockBackend *blk, Error *reason)
{
bdrv_op_unblock_all(blk->bs, reason);
if (blk->bs) {
bdrv_op_unblock_all(blk->bs, reason);
}
}
AioContext *blk_get_aio_context(BlockBackend *blk)
{
return bdrv_get_aio_context(blk->bs);
if (blk->bs) {
return bdrv_get_aio_context(blk->bs);
} else {
return qemu_get_aio_context();
}
}
static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb)
{
BlockBackendAIOCB *blk_acb = DO_UPCAST(BlockBackendAIOCB, common, acb);
return blk_get_aio_context(blk_acb->blk);
}
void blk_set_aio_context(BlockBackend *blk, AioContext *new_context)
{
bdrv_set_aio_context(blk->bs, new_context);
if (blk->bs) {
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);
if (blk->bs) {
bdrv_add_aio_context_notifier(blk->bs, attached_aio_context,
detach_aio_context, opaque);
}
}
void blk_remove_aio_context_notifier(BlockBackend *blk,
@ -848,28 +1085,36 @@ void blk_remove_aio_context_notifier(BlockBackend *blk,
void (*detach_aio_context)(void *),
void *opaque)
{
bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context,
detach_aio_context, opaque);
if (blk->bs) {
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);
if (blk->bs) {
bdrv_add_close_notifier(blk->bs, notify);
}
}
void blk_io_plug(BlockBackend *blk)
{
bdrv_io_plug(blk->bs);
if (blk->bs) {
bdrv_io_plug(blk->bs);
}
}
void blk_io_unplug(BlockBackend *blk)
{
bdrv_io_unplug(blk->bs);
if (blk->bs) {
bdrv_io_unplug(blk->bs);
}
}
BlockAcctStats *blk_get_stats(BlockBackend *blk)
{
return bdrv_get_stats(blk->bs);
return &blk->stats;
}
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
@ -902,6 +1147,10 @@ int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
int blk_truncate(BlockBackend *blk, int64_t offset)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_truncate(blk->bs, offset);
}
@ -918,20 +1167,67 @@ int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors)
int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
int64_t pos, int size)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_save_vmstate(blk->bs, buf, pos, size);
}
int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_load_vmstate(blk->bs, buf, pos, size);
}
int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_probe_blocksizes(blk->bs, bsz);
}
int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo)
{
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
return bdrv_probe_geometry(blk->bs, geo);
}
/*
* Updates the BlockBackendRootState object with data from the currently
* attached BlockDriverState.
*/
void blk_update_root_state(BlockBackend *blk)
{
assert(blk->bs);
blk->root_state.open_flags = blk->bs->open_flags;
blk->root_state.read_only = blk->bs->read_only;
blk->root_state.detect_zeroes = blk->bs->detect_zeroes;
if (blk->root_state.throttle_group) {
g_free(blk->root_state.throttle_group);
throttle_group_unref(blk->root_state.throttle_state);
}
if (blk->bs->throttle_state) {
const char *name = throttle_group_get_name(blk->bs);
blk->root_state.throttle_group = g_strdup(name);
blk->root_state.throttle_state = throttle_group_incref(name);
} else {
blk->root_state.throttle_group = NULL;
blk->root_state.throttle_state = NULL;
}
}
BlockBackendRootState *blk_get_root_state(BlockBackend *blk)
{
return &blk->root_state;
}

3
block/commit.c
View file

@ -17,6 +17,7 @@
#include "block/blockjob.h"
#include "qapi/qmp/qerror.h"
#include "qemu/ratelimit.h"
#include "sysemu/block-backend.h"
enum {
/*
@ -213,7 +214,7 @@ void commit_start(BlockDriverState *bs, BlockDriverState *base,
if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
!bdrv_iostatus_is_enabled(bs)) {
(!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
error_setg(errp, "Invalid parameter combination");
return;
}

14
block/curl.c
View file

@ -154,18 +154,20 @@ static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
switch (action) {
case CURL_POLL_IN:
aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
NULL, state);
aio_set_fd_handler(s->aio_context, fd, false,
curl_multi_read, NULL, state);
break;
case CURL_POLL_OUT:
aio_set_fd_handler(s->aio_context, fd, NULL, curl_multi_do, state);
aio_set_fd_handler(s->aio_context, fd, false,
NULL, curl_multi_do, state);
break;
case CURL_POLL_INOUT:
aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
curl_multi_do, state);
aio_set_fd_handler(s->aio_context, fd, false,
curl_multi_read, curl_multi_do, state);
break;
case CURL_POLL_REMOVE:
aio_set_fd_handler(s->aio_context, fd, NULL, NULL, NULL);
aio_set_fd_handler(s->aio_context, fd, false,
NULL, NULL, NULL);
break;
}

27
block/io.c
View file

@ -23,6 +23,7 @@
*/
#include "trace.h"
#include "sysemu/block-backend.h"
#include "block/blockjob.h"
#include "block/block_int.h"
#include "block/throttle-groups.h"
@ -1151,7 +1152,9 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
bdrv_set_dirty(bs, sector_num, nb_sectors);
block_acct_highest_sector(&bs->stats, sector_num, nb_sectors);
if (bs->wr_highest_offset < offset + bytes) {
bs->wr_highest_offset = offset + bytes;
}
if (ret >= 0) {
bs->total_sectors = MAX(bs->total_sectors, sector_num + nb_sectors);
@ -1903,7 +1906,10 @@ static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs,
}
}
block_acct_merge_done(&bs->stats, BLOCK_ACCT_WRITE, num_reqs - outidx - 1);
if (bs->blk) {
block_acct_merge_done(blk_get_stats(bs->blk), BLOCK_ACCT_WRITE,
num_reqs - outidx - 1);
}
return outidx + 1;
}
@ -2618,3 +2624,20 @@ void bdrv_flush_io_queue(BlockDriverState *bs)
}
bdrv_start_throttled_reqs(bs);
}
void bdrv_drained_begin(BlockDriverState *bs)
{
if (!bs->quiesce_counter++) {
aio_disable_external(bdrv_get_aio_context(bs));
}
bdrv_drain(bs);
}
void bdrv_drained_end(BlockDriverState *bs)
{
assert(bs->quiesce_counter > 0);
if (--bs->quiesce_counter > 0) {
return;
}
aio_enable_external(bdrv_get_aio_context(bs));
}

9
block/iscsi.c
View file

@ -291,8 +291,8 @@ iscsi_set_events(IscsiLun *iscsilun)
int ev = iscsi_which_events(iscsi);
if (ev != iscsilun->events) {
aio_set_fd_handler(iscsilun->aio_context,
iscsi_get_fd(iscsi),
aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsi),
false,
(ev & POLLIN) ? iscsi_process_read : NULL,
(ev & POLLOUT) ? iscsi_process_write : NULL,
iscsilun);
@ -1280,9 +1280,8 @@ static void iscsi_detach_aio_context(BlockDriverState *bs)
{
IscsiLun *iscsilun = bs->opaque;
aio_set_fd_handler(iscsilun->aio_context,
iscsi_get_fd(iscsilun->iscsi),
NULL, NULL, NULL);
aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsilun->iscsi),
false, NULL, NULL, NULL);
iscsilun->events = 0;
if (iscsilun->nop_timer) {

5
block/linux-aio.c
View file

@ -287,7 +287,7 @@ void laio_detach_aio_context(void *s_, AioContext *old_context)
{
struct qemu_laio_state *s = s_;
aio_set_event_notifier(old_context, &s->e, NULL);
aio_set_event_notifier(old_context, &s->e, false, NULL);
qemu_bh_delete(s->completion_bh);
}
@ -296,7 +296,8 @@ void laio_attach_aio_context(void *s_, AioContext *new_context)
struct qemu_laio_state *s = s_;
s->completion_bh = aio_bh_new(new_context, qemu_laio_completion_bh, s);
aio_set_event_notifier(new_context, &s->e, qemu_laio_completion_cb);
aio_set_event_notifier(new_context, &s->e, false,
qemu_laio_completion_cb);
}
void *laio_init(void)

17
block/mirror.c
View file

@ -14,6 +14,7 @@
#include "trace.h"
#include "block/blockjob.h"
#include "block/block_int.h"
#include "sysemu/block-backend.h"
#include "qapi/qmp/qerror.h"
#include "qemu/ratelimit.h"
#include "qemu/bitmap.h"
@ -599,7 +600,9 @@ immediate_exit:
g_free(s->cow_bitmap);
g_free(s->in_flight_bitmap);
bdrv_release_dirty_bitmap(bs, s->dirty_bitmap);
bdrv_iostatus_disable(s->target);
if (s->target->blk) {
blk_iostatus_disable(s->target->blk);
}
data = g_malloc(sizeof(*data));
data->ret = ret;
@ -621,7 +624,9 @@ static void mirror_iostatus_reset(BlockJob *job)
{
MirrorBlockJob *s = container_of(job, MirrorBlockJob, common);
bdrv_iostatus_reset(s->target);
if (s->target->blk) {
blk_iostatus_reset(s->target->blk);
}
}
static void mirror_complete(BlockJob *job, Error **errp)
@ -704,7 +709,7 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
if ((on_source_error == BLOCKDEV_ON_ERROR_STOP ||
on_source_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
!bdrv_iostatus_is_enabled(bs)) {
(!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
error_setg(errp, QERR_INVALID_PARAMETER, "on-source-error");
return;
}
@ -740,8 +745,10 @@ static void mirror_start_job(BlockDriverState *bs, BlockDriverState *target,
return;
}
bdrv_set_enable_write_cache(s->target, true);
bdrv_set_on_error(s->target, on_target_error, on_target_error);
bdrv_iostatus_enable(s->target);
if (s->target->blk) {
blk_set_on_error(s->target->blk, on_target_error, on_target_error);
blk_iostatus_enable(s->target->blk);
}
s->common.co = qemu_coroutine_create(mirror_run);
trace_mirror_start(bs, s, s->common.co, opaque);
qemu_coroutine_enter(s->common.co, s);

10
block/nbd-client.c
View file

@ -124,7 +124,7 @@ static int nbd_co_send_request(BlockDriverState *bs,
s->send_coroutine = qemu_coroutine_self();
aio_context = bdrv_get_aio_context(bs);
aio_set_fd_handler(aio_context, s->sock,
aio_set_fd_handler(aio_context, s->sock, false,
nbd_reply_ready, nbd_restart_write, bs);
if (qiov) {
if (!s->is_unix) {
@ -144,7 +144,8 @@ static int nbd_co_send_request(BlockDriverState *bs,
} else {
rc = nbd_send_request(s->sock, request);
}
aio_set_fd_handler(aio_context, s->sock, nbd_reply_ready, NULL, bs);
aio_set_fd_handler(aio_context, s->sock, false,
nbd_reply_ready, NULL, bs);
s->send_coroutine = NULL;
qemu_co_mutex_unlock(&s->send_mutex);
return rc;
@ -348,14 +349,15 @@ int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
void nbd_client_detach_aio_context(BlockDriverState *bs)
{
aio_set_fd_handler(bdrv_get_aio_context(bs),
nbd_get_client_session(bs)->sock, NULL, NULL, NULL);
nbd_get_client_session(bs)->sock,
false, NULL, NULL, NULL);
}
void nbd_client_attach_aio_context(BlockDriverState *bs,
AioContext *new_context)
{
aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sock,
nbd_reply_ready, NULL, bs);
false, nbd_reply_ready, NULL, bs);
}
void nbd_client_close(BlockDriverState *bs)

17
block/nfs.c
View file

@ -63,11 +63,10 @@ static void nfs_set_events(NFSClient *client)
{
int ev = nfs_which_events(client->context);
if (ev != client->events) {
aio_set_fd_handler(client->aio_context,
nfs_get_fd(client->context),
aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
false,
(ev & POLLIN) ? nfs_process_read : NULL,
(ev & POLLOUT) ? nfs_process_write : NULL,
client);
(ev & POLLOUT) ? nfs_process_write : NULL, client);
}
client->events = ev;
@ -242,9 +241,8 @@ static void nfs_detach_aio_context(BlockDriverState *bs)
{
NFSClient *client = bs->opaque;
aio_set_fd_handler(client->aio_context,
nfs_get_fd(client->context),
NULL, NULL, NULL);
aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
false, NULL, NULL, NULL);
client->events = 0;
}
@ -263,9 +261,8 @@ static void nfs_client_close(NFSClient *client)
if (client->fh) {
nfs_close(client->context, client->fh);
}
aio_set_fd_handler(client->aio_context,
nfs_get_fd(client->context),
NULL, NULL, NULL);
aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
false, NULL, NULL, NULL);
nfs_destroy_context(client->context);
}
memset(client, 0, sizeof(NFSClient));

36
block/qapi.c
View file

@ -301,17 +301,17 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
info->tray_open = blk_dev_is_tray_open(blk);
}
if (bdrv_iostatus_is_enabled(bs)) {
if (blk_iostatus_is_enabled(blk)) {
info->has_io_status = true;
info->io_status = bs->iostatus;
info->io_status = blk_iostatus(blk);
}
if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
info->has_dirty_bitmaps = true;
info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
}
if (bs->drv) {
if (bs && bs->drv) {
info->has_inserted = true;
info->inserted = bdrv_block_device_info(bs, errp);
if (info->inserted == NULL) {
@ -344,18 +344,22 @@ static BlockStats *bdrv_query_stats(const BlockDriverState *bs,
}
s->stats = g_malloc0(sizeof(*s->stats));
s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ];
s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];
s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ];
s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE];
s->stats->rd_merged = bs->stats.merged[BLOCK_ACCT_READ];
s->stats->wr_merged = bs->stats.merged[BLOCK_ACCT_WRITE];
s->stats->wr_highest_offset =
bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE;
s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH];
s->stats->wr_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_WRITE];
s->stats->rd_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_READ];
s->stats->flush_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_FLUSH];
if (bs->blk) {
BlockAcctStats *stats = blk_get_stats(bs->blk);
s->stats->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
s->stats->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
s->stats->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
s->stats->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
s->stats->rd_merged = stats->merged[BLOCK_ACCT_READ];
s->stats->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
s->stats->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
s->stats->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
s->stats->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
s->stats->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
}
s->stats->wr_highest_offset = bs->wr_highest_offset;
if (bs->file) {
s->has_parent = true;

230
block/raw-posix.c
View file

@ -127,11 +127,6 @@ do { \
#define FTYPE_FILE 0
#define FTYPE_CD 1
#define FTYPE_FD 2
/* if the FD is not accessed during that time (in ns), we try to
reopen it to see if the disk has been changed */
#define FD_OPEN_TIMEOUT (1000000000)
#define MAX_BLOCKSIZE 4096
@ -141,13 +136,6 @@ typedef struct BDRVRawState {
int open_flags;
size_t buf_align;
#if defined(__linux__)
/* linux floppy specific */
int64_t fd_open_time;
int64_t fd_error_time;
int fd_got_error;
int fd_media_changed;
#endif
#ifdef CONFIG_LINUX_AIO
int use_aio;
void *aio_ctx;
@ -635,7 +623,7 @@ static int raw_reopen_prepare(BDRVReopenState *state,
}
#endif
if (s->type == FTYPE_FD || s->type == FTYPE_CD) {
if (s->type == FTYPE_CD) {
raw_s->open_flags |= O_NONBLOCK;
}
@ -2187,47 +2175,6 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
}
#if defined(__linux__)
/* Note: we do not have a reliable method to detect if the floppy is
present. The current method is to try to open the floppy at every
I/O and to keep it opened during a few hundreds of ms. */
static int fd_open(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int last_media_present;
if (s->type != FTYPE_FD)
return 0;
last_media_present = (s->fd >= 0);
if (s->fd >= 0 &&
(qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
qemu_close(s->fd);
s->fd = -1;
DPRINTF("Floppy closed\n");
}
if (s->fd < 0) {
if (s->fd_got_error &&
(qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - s->fd_error_time) < FD_OPEN_TIMEOUT) {
DPRINTF("No floppy (open delayed)\n");
return -EIO;
}
s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK);
if (s->fd < 0) {
s->fd_error_time = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
s->fd_got_error = 1;
if (last_media_present)
s->fd_media_changed = 1;
DPRINTF("No floppy\n");
return -EIO;
}
DPRINTF("Floppy opened\n");
}
if (!last_media_present)
s->fd_media_changed = 1;
s->fd_open_time = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
s->fd_got_error = 0;
return 0;
}
static int hdev_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
{
BDRVRawState *s = bs->opaque;
@ -2256,8 +2203,8 @@ static BlockAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
}
#endif /* linux */
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
static int fd_open(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
@ -2267,14 +2214,6 @@ static int fd_open(BlockDriverState *bs)
return 0;
return -EIO;
}
#else /* !linux && !FreeBSD */
static int fd_open(BlockDriverState *bs)
{
return 0;
}
#endif /* !linux && !FreeBSD */
static coroutine_fn BlockAIOCB *hdev_aio_discard(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
@ -2318,14 +2257,13 @@ static int hdev_create(const char *filename, QemuOpts *opts,
int64_t total_size = 0;
bool has_prefix;
/* This function is used by all three protocol block drivers and therefore
* any of these three prefixes may be given.
/* This function is used by both protocol block drivers and therefore either
* of these prefixes may be given.
* The return value has to be stored somewhere, otherwise this is an error
* due to -Werror=unused-value. */
has_prefix =
strstart(filename, "host_device:", &filename) ||
strstart(filename, "host_cdrom:" , &filename) ||
strstart(filename, "host_floppy:", &filename);
strstart(filename, "host_cdrom:" , &filename);
(void)has_prefix;
@ -2405,155 +2343,6 @@ static BlockDriver bdrv_host_device = {
#endif
};
#ifdef __linux__
static void floppy_parse_filename(const char *filename, QDict *options,
Error **errp)
{
/* The prefix is optional, just as for "file". */
strstart(filename, "host_floppy:", &filename);
qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename)));
}
static int floppy_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVRawState *s = bs->opaque;
Error *local_err = NULL;
int ret;
s->type = FTYPE_FD;
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err);
if (ret) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
}
/* close fd so that we can reopen it as needed */
qemu_close(s->fd);
s->fd = -1;
s->fd_media_changed = 1;
error_report("Host floppy pass-through is deprecated");
error_printf("Support for it will be removed in a future release.\n");
return 0;
}
static int floppy_probe_device(const char *filename)
{
int fd, ret;
int prio = 0;
struct floppy_struct fdparam;
struct stat st;
if (strstart(filename, "/dev/fd", NULL) &&
!strstart(filename, "/dev/fdset/", NULL) &&
!strstart(filename, "/dev/fd/", NULL)) {
prio = 50;
}
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
goto out;
}
ret = fstat(fd, &st);
if (ret == -1 || !S_ISBLK(st.st_mode)) {
goto outc;
}
/* Attempt to detect via a floppy specific ioctl */
ret = ioctl(fd, FDGETPRM, &fdparam);
if (ret >= 0)
prio = 100;
outc:
qemu_close(fd);
out:
return prio;
}
static int floppy_is_inserted(BlockDriverState *bs)
{
return fd_open(bs) >= 0;
}
static int floppy_media_changed(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int ret;
/*
* XXX: we do not have a true media changed indication.
* It does not work if the floppy is changed without trying to read it.
*/
fd_open(bs);
ret = s->fd_media_changed;
s->fd_media_changed = 0;
DPRINTF("Floppy changed=%d\n", ret);
return ret;
}
static void floppy_eject(BlockDriverState *bs, bool eject_flag)
{
BDRVRawState *s = bs->opaque;
int fd;
if (s->fd >= 0) {
qemu_close(s->fd);
s->fd = -1;
}
fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK);
if (fd >= 0) {
if (ioctl(fd, FDEJECT, 0) < 0)
perror("FDEJECT");
qemu_close(fd);
}
}
static BlockDriver bdrv_host_floppy = {
.format_name = "host_floppy",
.protocol_name = "host_floppy",
.instance_size = sizeof(BDRVRawState),
.bdrv_needs_filename = true,
.bdrv_probe_device = floppy_probe_device,
.bdrv_parse_filename = floppy_parse_filename,
.bdrv_file_open = floppy_open,
.bdrv_close = raw_close,
.bdrv_reopen_prepare = raw_reopen_prepare,
.bdrv_reopen_commit = raw_reopen_commit,
.bdrv_reopen_abort = raw_reopen_abort,
.bdrv_create = hdev_create,
.create_opts = &raw_create_opts,
.bdrv_aio_readv = raw_aio_readv,
.bdrv_aio_writev = raw_aio_writev,
.bdrv_aio_flush = raw_aio_flush,
.bdrv_refresh_limits = raw_refresh_limits,
.bdrv_io_plug = raw_aio_plug,
.bdrv_io_unplug = raw_aio_unplug,
.bdrv_flush_io_queue = raw_aio_flush_io_queue,
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.has_variable_length = true,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
.bdrv_detach_aio_context = raw_detach_aio_context,
.bdrv_attach_aio_context = raw_attach_aio_context,
/* removable device support */
.bdrv_is_inserted = floppy_is_inserted,
.bdrv_media_changed = floppy_media_changed,
.bdrv_eject = floppy_eject,
};
#endif
#if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
static void cdrom_parse_filename(const char *filename, QDict *options,
Error **errp)
@ -2609,15 +2398,13 @@ out:
return prio;
}
static int cdrom_is_inserted(BlockDriverState *bs)
static bool cdrom_is_inserted(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int ret;
ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
if (ret == CDS_DISC_OK)
return 1;
return 0;
return ret == CDS_DISC_OK;
}
static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
@ -2743,7 +2530,7 @@ static int cdrom_reopen(BlockDriverState *bs)
return 0;
}
static int cdrom_is_inserted(BlockDriverState *bs)
static bool cdrom_is_inserted(BlockDriverState *bs)
{
return raw_getlength(bs) > 0;
}
@ -2831,7 +2618,6 @@ static void bdrv_file_init(void)
bdrv_register(&bdrv_file);
bdrv_register(&bdrv_host_device);
#ifdef __linux__
bdrv_register(&bdrv_host_floppy);
bdrv_register(&bdrv_host_cdrom);
#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)

6
block/raw_bsd.c
View file

@ -154,11 +154,6 @@ static int raw_truncate(BlockDriverState *bs, int64_t offset)
return bdrv_truncate(bs->file->bs, offset);
}
static int raw_is_inserted(BlockDriverState *bs)
{
return bdrv_is_inserted(bs->file->bs);
}
static int raw_media_changed(BlockDriverState *bs)
{
return bdrv_media_changed(bs->file->bs);
@ -264,7 +259,6 @@ BlockDriver bdrv_raw = {
.bdrv_refresh_limits = &raw_refresh_limits,
.bdrv_probe_blocksizes = &raw_probe_blocksizes,
.bdrv_probe_geometry = &raw_probe_geometry,
.bdrv_is_inserted = &raw_is_inserted,
.bdrv_media_changed = &raw_media_changed,
.bdrv_eject = &raw_eject,
.bdrv_lock_medium = &raw_lock_medium,

38
block/sheepdog.c
View file

@ -651,14 +651,16 @@ static coroutine_fn void do_co_req(void *opaque)
unsigned int *rlen = srco->rlen;
co = qemu_coroutine_self();
aio_set_fd_handler(srco->aio_context, sockfd, NULL, restart_co_req, co);
aio_set_fd_handler(srco->aio_context, sockfd, false,
NULL, restart_co_req, co);
ret = send_co_req(sockfd, hdr, data, wlen);
if (ret < 0) {
goto out;
}
aio_set_fd_handler(srco->aio_context, sockfd, restart_co_req, NULL, co);
aio_set_fd_handler(srco->aio_context, sockfd, false,
restart_co_req, NULL, co);
ret = qemu_co_recv(sockfd, hdr, sizeof(*hdr));
if (ret != sizeof(*hdr)) {
@ -683,7 +685,8 @@ static coroutine_fn void do_co_req(void *opaque)
out:
/* there is at most one request for this sockfd, so it is safe to
* set each handler to NULL. */
aio_set_fd_handler(srco->aio_context, sockfd, NULL, NULL, NULL);
aio_set_fd_handler(srco->aio_context, sockfd, false,
NULL, NULL, NULL);
srco->ret = ret;
srco->finished = true;
@ -735,7 +738,8 @@ static coroutine_fn void reconnect_to_sdog(void *opaque)
BDRVSheepdogState *s = opaque;
AIOReq *aio_req, *next;
aio_set_fd_handler(s->aio_context, s->fd, NULL, NULL, NULL);
aio_set_fd_handler(s->aio_context, s->fd, false, NULL,
NULL, NULL);
close(s->fd);
s->fd = -1;
@ -938,7 +942,8 @@ static int get_sheep_fd(BDRVSheepdogState *s, Error **errp)
return fd;
}
aio_set_fd_handler(s->aio_context, fd, co_read_response, NULL, s);
aio_set_fd_handler(s->aio_context, fd, false,
co_read_response, NULL, s);
return fd;
}
@ -1199,7 +1204,7 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
qemu_co_mutex_lock(&s->lock);
s->co_send = qemu_coroutine_self();
aio_set_fd_handler(s->aio_context, s->fd,
aio_set_fd_handler(s->aio_context, s->fd, false,
co_read_response, co_write_request, s);
socket_set_cork(s->fd, 1);
@ -1218,7 +1223,8 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
}
out:
socket_set_cork(s->fd, 0);
aio_set_fd_handler(s->aio_context, s->fd, co_read_response, NULL, s);
aio_set_fd_handler(s->aio_context, s->fd, false,
co_read_response, NULL, s);
s->co_send = NULL;
qemu_co_mutex_unlock(&s->lock);
}
@ -1368,7 +1374,8 @@ static void sd_detach_aio_context(BlockDriverState *bs)
{
BDRVSheepdogState *s = bs->opaque;
aio_set_fd_handler(s->aio_context, s->fd, NULL, NULL, NULL);
aio_set_fd_handler(s->aio_context, s->fd, false, NULL,
NULL, NULL);
}
static void sd_attach_aio_context(BlockDriverState *bs,
@ -1377,7 +1384,8 @@ static void sd_attach_aio_context(BlockDriverState *bs,
BDRVSheepdogState *s = bs->opaque;
s->aio_context = new_context;
aio_set_fd_handler(new_context, s->fd, co_read_response, NULL, s);
aio_set_fd_handler(new_context, s->fd, false,
co_read_response, NULL, s);
}
/* TODO Convert to fine grained options */
@ -1490,7 +1498,8 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
g_free(buf);
return 0;
out:
aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd, NULL, NULL, NULL);
aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd,
false, NULL, NULL, NULL);
if (s->fd >= 0) {
closesocket(s->fd);
}
@ -1528,7 +1537,8 @@ static void sd_reopen_commit(BDRVReopenState *state)
BDRVSheepdogState *s = state->bs->opaque;
if (s->fd) {
aio_set_fd_handler(s->aio_context, s->fd, NULL, NULL, NULL);
aio_set_fd_handler(s->aio_context, s->fd, false,
NULL, NULL, NULL);
closesocket(s->fd);
}
@ -1551,7 +1561,8 @@ static void sd_reopen_abort(BDRVReopenState *state)
}
if (re_s->fd) {
aio_set_fd_handler(s->aio_context, re_s->fd, NULL, NULL, NULL);
aio_set_fd_handler(s->aio_context, re_s->fd, false,
NULL, NULL, NULL);
closesocket(re_s->fd);
}
@ -1935,7 +1946,8 @@ static void sd_close(BlockDriverState *bs)
error_report("%s, %s", sd_strerror(rsp->result), s->name);
}
aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd, NULL, NULL, NULL);
aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd,
false, NULL, NULL, NULL);
closesocket(s->fd);
g_free(s->host_spec);
}

5
block/ssh.c
View file

@ -800,14 +800,15 @@ static coroutine_fn void set_fd_handler(BDRVSSHState *s, BlockDriverState *bs)
rd_handler, wr_handler);
aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock,
rd_handler, wr_handler, co);
false, rd_handler, wr_handler, co);
}
static coroutine_fn void clear_fd_handler(BDRVSSHState *s,
BlockDriverState *bs)
{
DPRINTF("s->sock=%d", s->sock);
aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock, NULL, NULL, NULL);
aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock,
false, NULL, NULL, NULL);
}
/* A non-blocking call returned EAGAIN, so yield, ensuring the

3
block/stream.c
View file

@ -16,6 +16,7 @@
#include "block/blockjob.h"
#include "qapi/qmp/qerror.h"
#include "qemu/ratelimit.h"
#include "sysemu/block-backend.h"
enum {
/*
@ -222,7 +223,7 @@ void stream_start(BlockDriverState *bs, BlockDriverState *base,
if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
!bdrv_iostatus_is_enabled(bs)) {
(!bs->blk || !blk_iostatus_is_enabled(bs->blk))) {
error_setg(errp, QERR_INVALID_PARAMETER, "on-error");
return;
}

50
block/throttle-groups.c
View file

@ -33,8 +33,7 @@
* its own locking.
*
* This locking is however handled internally in this file, so it's
* mostly transparent to outside users (but see the documentation in
* throttle_groups_lock()).
* transparent to outside users.
*
* The whole ThrottleGroup structure is private and invisible to
* outside users, that only use it through its ThrottleState.
@ -76,9 +75,9 @@ static QTAILQ_HEAD(, ThrottleGroup) throttle_groups =
* created.
*
* @name: the name of the ThrottleGroup
* @ret: the ThrottleGroup
* @ret: the ThrottleState member of the ThrottleGroup
*/
static ThrottleGroup *throttle_group_incref(const char *name)
ThrottleState *throttle_group_incref(const char *name)
{
ThrottleGroup *tg = NULL;
ThrottleGroup *iter;
@ -108,7 +107,7 @@ static ThrottleGroup *throttle_group_incref(const char *name)
qemu_mutex_unlock(&throttle_groups_lock);
return tg;
return &tg->ts;
}
/* Decrease the reference count of a ThrottleGroup.
@ -116,10 +115,12 @@ static ThrottleGroup *throttle_group_incref(const char *name)
* When the reference count reaches zero the ThrottleGroup is
* destroyed.
*
* @tg: The ThrottleGroup to unref
* @ts: The ThrottleGroup to unref, given by its ThrottleState member
*/
static void throttle_group_unref(ThrottleGroup *tg)
void throttle_group_unref(ThrottleState *ts)
{
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
qemu_mutex_lock(&throttle_groups_lock);
if (--tg->refcount == 0) {
QTAILQ_REMOVE(&throttle_groups, tg, list);
@ -401,7 +402,8 @@ static void write_timer_cb(void *opaque)
void throttle_group_register_bs(BlockDriverState *bs, const char *groupname)
{
int i;
ThrottleGroup *tg = throttle_group_incref(groupname);
ThrottleState *ts = throttle_group_incref(groupname);
ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
int clock_type = QEMU_CLOCK_REALTIME;
if (qtest_enabled()) {
@ -409,7 +411,7 @@ void throttle_group_register_bs(BlockDriverState *bs, const char *groupname)
clock_type = QEMU_CLOCK_VIRTUAL;
}
bs->throttle_state = &tg->ts;
bs->throttle_state = ts;
qemu_mutex_lock(&tg->lock);
/* If the ThrottleGroup is new set this BlockDriverState as the token */
@ -461,38 +463,10 @@ void throttle_group_unregister_bs(BlockDriverState *bs)
throttle_timers_destroy(&bs->throttle_timers);
qemu_mutex_unlock(&tg->lock);
throttle_group_unref(tg);
throttle_group_unref(&tg->ts);
bs->throttle_state = NULL;
}
/* Acquire the lock of this throttling group.
*
* You won't normally need to use this. None of the functions from the
* ThrottleGroup API require you to acquire the lock since all of them
* deal with it internally.
*
* This should only be used in exceptional cases when you want to
* access the protected fields of a BlockDriverState directly
* (e.g. bdrv_swap()).
*
* @bs: a BlockDriverState that is member of the group
*/
void throttle_group_lock(BlockDriverState *bs)
{
ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
qemu_mutex_lock(&tg->lock);
}
/* Release the lock of this throttling group.
*
* See the comments in throttle_group_lock().
*/
void throttle_group_unlock(BlockDriverState *bs)
{
ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
qemu_mutex_unlock(&tg->lock);
}
static void throttle_groups_init(void)
{
qemu_mutex_init(&throttle_groups_lock);

5
block/win32-aio.c
View file

@ -174,7 +174,7 @@ int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile)
void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
AioContext *old_context)
{
aio_set_event_notifier(old_context, &aio->e, NULL);
aio_set_event_notifier(old_context, &aio->e, false, NULL);
aio->is_aio_context_attached = false;
}
@ -182,7 +182,8 @@ void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
AioContext *new_context)
{
aio->is_aio_context_attached = true;
aio_set_event_notifier(new_context, &aio->e, win32_aio_completion_cb);
aio_set_event_notifier(new_context, &aio->e, false,
win32_aio_completion_cb);
}
QEMUWin32AIOState *win32_aio_init(void)

642
blockdev.c
View file

File diff suppressed because it is too large Load diff

5
blockjob.c
View file

@ -29,6 +29,7 @@
#include "block/block.h"
#include "block/blockjob.h"
#include "block/block_int.h"
#include "sysemu/block-backend.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qjson.h"
#include "qemu/coroutine.h"
@ -354,8 +355,8 @@ BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,
job->user_paused = true;
block_job_pause(job);
block_job_iostatus_set_err(job, error);
if (bs != job->bs) {
bdrv_iostatus_set_err(bs, error);
if (bs->blk && bs != job->bs) {
blk_iostatus_set_err(bs->blk, error);
}
}
return action;

5
hw/block/dataplane/virtio-blk.c
View file

@ -283,7 +283,8 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
/* Get this show started by hooking up our callbacks */
aio_context_acquire(s->ctx);
aio_set_event_notifier(s->ctx, &s->host_notifier, handle_notify);
aio_set_event_notifier(s->ctx, &s->host_notifier, true,
handle_notify);
aio_context_release(s->ctx);
return;
@ -319,7 +320,7 @@ void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s)
aio_context_acquire(s->ctx);
/* Stop notifications for new requests from guest */
aio_set_event_notifier(s->ctx, &s->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->host_notifier, true, NULL);
/* Drain and switch bs back to the QEMU main loop */
blk_set_aio_context(s->conf->conf.blk, qemu_get_aio_context());

20
hw/block/fdc.c
View file

@ -192,6 +192,8 @@ typedef struct FDrive {
uint8_t ro; /* Is read-only */
uint8_t media_changed; /* Is media changed */
uint8_t media_rate; /* Data rate of medium */
bool media_inserted; /* Is there a medium in the tray */
} FDrive;
static void fd_init(FDrive *drv)
@ -261,7 +263,7 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect,
#endif
drv->head = head;
if (drv->track != track) {
if (drv->blk != NULL && blk_is_inserted(drv->blk)) {
if (drv->media_inserted) {
drv->media_changed = 0;
}
ret = 1;
@ -270,7 +272,7 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect,
drv->sect = sect;
}
if (drv->blk == NULL || !blk_is_inserted(drv->blk)) {
if (!drv->media_inserted) {
ret = 2;
}
@ -296,7 +298,7 @@ static void fd_revalidate(FDrive *drv)
ro = blk_is_read_only(drv->blk);
pick_geometry(drv->blk, &nb_heads, &max_track,
&last_sect, drv->drive, &drive, &rate);
if (!blk_is_inserted(drv->blk)) {
if (!drv->media_inserted) {
FLOPPY_DPRINTF("No disk in drive\n");
} else {
FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads,
@ -692,7 +694,7 @@ static bool fdrive_media_changed_needed(void *opaque)
{
FDrive *drive = opaque;
return (drive->blk != NULL && drive->media_changed != 1);
return (drive->media_inserted && drive->media_changed != 1);
}
static const VMStateDescription vmstate_fdrive_media_changed = {
@ -2184,12 +2186,21 @@ static void fdctrl_change_cb(void *opaque, bool load)
{
FDrive *drive = opaque;
drive->media_inserted = load && drive->blk && blk_is_inserted(drive->blk);
drive->media_changed = 1;
fd_revalidate(drive);
}
static bool fdctrl_is_tray_open(void *opaque)
{
FDrive *drive = opaque;
return !drive->media_inserted;
}
static const BlockDevOps fdctrl_block_ops = {
.change_media_cb = fdctrl_change_cb,
.is_tray_open = fdctrl_is_tray_open,
};
/* Init functions */
@ -2217,6 +2228,7 @@ static void fdctrl_connect_drives(FDCtrl *fdctrl, Error **errp)
fdctrl_change_cb(drive, 0);
if (drive->blk) {
blk_set_dev_ops(drive->blk, &fdctrl_block_ops, drive);
drive->media_inserted = blk_is_inserted(drive->blk);
}
}
}

4
hw/block/xen_disk.c
View file

@ -931,9 +931,11 @@ static int blk_connect(struct XenDevice *xendev)
blk_attach_dev_nofail(blkdev->blk, blkdev);
blkdev->file_size = blk_getlength(blkdev->blk);
if (blkdev->file_size < 0) {
BlockDriverState *bs = blk_bs(blkdev->blk);
const char *drv_name = bs ? bdrv_get_format_name(bs) : NULL;
xen_be_printf(&blkdev->xendev, 1, "blk_getlength: %d (%s) | drv %s\n",
(int)blkdev->file_size, strerror(-blkdev->file_size),
bdrv_get_format_name(blk_bs(blkdev->blk)) ?: "-");
drv_name ?: "-");
blkdev->file_size = 0;
}

22
hw/scsi/virtio-scsi-dataplane.c
View file

@ -60,7 +60,7 @@ static VirtIOSCSIVring *virtio_scsi_vring_init(VirtIOSCSI *s,
r = g_new(VirtIOSCSIVring, 1);
r->host_notifier = *virtio_queue_get_host_notifier(vq);
r->guest_notifier = *virtio_queue_get_guest_notifier(vq);
aio_set_event_notifier(s->ctx, &r->host_notifier, handler);
aio_set_event_notifier(s->ctx, &r->host_notifier, true, handler);
r->parent = s;
@ -71,7 +71,7 @@ static VirtIOSCSIVring *virtio_scsi_vring_init(VirtIOSCSI *s,
return r;
fail_vring:
aio_set_event_notifier(s->ctx, &r->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &r->host_notifier, true, NULL);
k->set_host_notifier(qbus->parent, n, false);
g_free(r);
return NULL;
@ -162,14 +162,17 @@ static void virtio_scsi_clear_aio(VirtIOSCSI *s)
int i;
if (s->ctrl_vring) {
aio_set_event_notifier(s->ctx, &s->ctrl_vring->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->ctrl_vring->host_notifier,
true, NULL);
}
if (s->event_vring) {
aio_set_event_notifier(s->ctx, &s->event_vring->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->event_vring->host_notifier,
true, NULL);
}
if (s->cmd_vrings) {
for (i = 0; i < vs->conf.num_queues && s->cmd_vrings[i]; i++) {
aio_set_event_notifier(s->ctx, &s->cmd_vrings[i]->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->cmd_vrings[i]->host_notifier,
true, NULL);
}
}
}
@ -290,10 +293,13 @@ void virtio_scsi_dataplane_stop(VirtIOSCSI *s)
aio_context_acquire(s->ctx);
aio_set_event_notifier(s->ctx, &s->ctrl_vring->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->event_vring->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->ctrl_vring->host_notifier,
true, NULL);
aio_set_event_notifier(s->ctx, &s->event_vring->host_notifier,
true, NULL);
for (i = 0; i < vs->conf.num_queues; i++) {
aio_set_event_notifier(s->ctx, &s->cmd_vrings[i]->host_notifier, NULL);
aio_set_event_notifier(s->ctx, &s->cmd_vrings[i]->host_notifier,
true, NULL);
}
blk_drain_all(); /* ensure there are no in-flight requests */

30
hw/usb/dev-storage.c
View file

@ -613,20 +613,22 @@ static void usb_msd_realize_storage(USBDevice *dev, Error **errp)
return;
}
bdrv_add_key(blk_bs(blk), NULL, &err);
if (err) {
if (monitor_cur_is_qmp()) {
error_propagate(errp, err);
return;
}
error_free(err);
err = NULL;
if (cur_mon) {
monitor_read_bdrv_key_start(cur_mon, blk_bs(blk),
usb_msd_password_cb, s);
s->dev.auto_attach = 0;
} else {
autostart = 0;
if (blk_bs(blk)) {
bdrv_add_key(blk_bs(blk), NULL, &err);
if (err) {
if (monitor_cur_is_qmp()) {
error_propagate(errp, err);
return;
}
error_free(err);
err = NULL;
if (cur_mon) {
monitor_read_bdrv_key_start(cur_mon, blk_bs(blk),
usb_msd_password_cb, s);
s->dev.auto_attach = 0;
} else {
autostart = 0;
}
}
}

3
include/block/accounting.h
View file

@ -40,7 +40,6 @@ typedef struct BlockAcctStats {
uint64_t nr_ops[BLOCK_MAX_IOTYPE];
uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
uint64_t merged[BLOCK_MAX_IOTYPE];
uint64_t wr_highest_sector;
} BlockAcctStats;
typedef struct BlockAcctCookie {
@ -52,8 +51,6 @@ typedef struct BlockAcctCookie {
void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
int64_t bytes, enum BlockAcctType type);
void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
unsigned int nb_sectors);
void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
int num_requests);

40
include/block/aio.h
View file

@ -122,6 +122,8 @@ struct AioContext {
/* TimerLists for calling timers - one per clock type */
QEMUTimerListGroup tlg;
int external_disable_cnt;
};
/**
@ -299,6 +301,7 @@ bool aio_poll(AioContext *ctx, bool blocking);
*/
void aio_set_fd_handler(AioContext *ctx,
int fd,
bool is_external,
IOHandler *io_read,
IOHandler *io_write,
void *opaque);
@ -312,6 +315,7 @@ void aio_set_fd_handler(AioContext *ctx,
*/
void aio_set_event_notifier(AioContext *ctx,
EventNotifier *notifier,
bool is_external,
EventNotifierHandler *io_read);
/* Return a GSource that lets the main loop poll the file descriptors attached
@ -373,4 +377,40 @@ static inline void aio_timer_init(AioContext *ctx,
*/
int64_t aio_compute_timeout(AioContext *ctx);
/**
* aio_disable_external:
* @ctx: the aio context
*
* Disable the further processing of external clients.
*/
static inline void aio_disable_external(AioContext *ctx)
{
atomic_inc(&ctx->external_disable_cnt);
}
/**
* aio_enable_external:
* @ctx: the aio context
*
* Enable the processing of external clients.
*/
static inline void aio_enable_external(AioContext *ctx)
{
assert(ctx->external_disable_cnt > 0);
atomic_dec(&ctx->external_disable_cnt);
}
/**
* aio_node_check:
* @ctx: the aio context
* @is_external: Whether or not the checked node is an external event source.
*
* Check if the node's is_external flag is okay to be polled by the ctx at this
* moment. True means green light.
*/
static inline bool aio_node_check(AioContext *ctx, bool is_external)
{
return !is_external || !atomic_read(&ctx->external_disable_cnt);
}
#endif

33
include/block/block.h
View file

@ -174,11 +174,6 @@ typedef enum BlockOpType {
BLOCK_OP_TYPE_MAX,
} BlockOpType;
void bdrv_iostatus_enable(BlockDriverState *bs);
void bdrv_iostatus_reset(BlockDriverState *bs);
void bdrv_iostatus_disable(BlockDriverState *bs);
bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
void bdrv_info_print(Monitor *mon, const QObject *data);
void bdrv_info(Monitor *mon, QObject **ret_data);
void bdrv_stats_print(Monitor *mon, const QObject *data);
@ -389,17 +384,11 @@ int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
int64_t sector_num, int nb_sectors, int *pnum);
void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
BlockdevOnError on_write_error);
BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read);
BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error);
void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,
bool is_read, int error);
int bdrv_is_read_only(BlockDriverState *bs);
int bdrv_is_sg(BlockDriverState *bs);
int bdrv_enable_write_cache(BlockDriverState *bs);
void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
int bdrv_is_inserted(BlockDriverState *bs);
bool bdrv_is_inserted(BlockDriverState *bs);
int bdrv_media_changed(BlockDriverState *bs);
void bdrv_lock_medium(BlockDriverState *bs, bool locked);
void bdrv_eject(BlockDriverState *bs, bool eject_flag);
@ -466,7 +455,6 @@ void bdrv_img_create(const char *filename, const char *fmt,
size_t bdrv_min_mem_align(BlockDriverState *bs);
/* Returns optimal alignment in bytes for bounce buffer */
size_t bdrv_opt_mem_align(BlockDriverState *bs);
void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
void *qemu_blockalign(BlockDriverState *bs, size_t size);
void *qemu_blockalign0(BlockDriverState *bs, size_t size);
void *qemu_try_blockalign(BlockDriverState *bs, size_t size);
@ -622,6 +610,23 @@ void bdrv_io_plug(BlockDriverState *bs);
void bdrv_io_unplug(BlockDriverState *bs);
void bdrv_flush_io_queue(BlockDriverState *bs);
BlockAcctStats *bdrv_get_stats(BlockDriverState *bs);
/**
* bdrv_drained_begin:
*
* Begin a quiesced section for exclusive access to the BDS, by disabling
* external request sources including NBD server and device model. Note that
* this doesn't block timers or coroutines from submitting more requests, which
* means block_job_pause is still necessary.
*
* This function can be recursive.
*/
void bdrv_drained_begin(BlockDriverState *bs);
/**
* bdrv_drained_end:
*
* End a quiescent section started by bdrv_drained_begin().
*/
void bdrv_drained_end(BlockDriverState *bs);
#endif

27
include/block/block_int.h
View file

@ -26,6 +26,7 @@
#include "block/accounting.h"
#include "block/block.h"
#include "block/throttle-groups.h"
#include "qemu/option.h"
#include "qemu/queue.h"
#include "qemu/coroutine.h"
@ -212,7 +213,7 @@ struct BlockDriver {
const char *backing_file, const char *backing_fmt);
/* removable device specific */
int (*bdrv_is_inserted)(BlockDriverState *bs);
bool (*bdrv_is_inserted)(BlockDriverState *bs);
int (*bdrv_media_changed)(BlockDriverState *bs);
void (*bdrv_eject)(BlockDriverState *bs, bool eject_flag);
void (*bdrv_lock_medium)(BlockDriverState *bs, bool locked);
@ -399,8 +400,8 @@ struct BlockDriverState {
unsigned pending_reqs[2];
QLIST_ENTRY(BlockDriverState) round_robin;
/* I/O stats (display with "info blockstats"). */
BlockAcctStats stats;
/* Offset after the highest byte written to */
uint64_t wr_highest_offset;
/* I/O Limits */
BlockLimits bl;
@ -411,18 +412,9 @@ struct BlockDriverState {
/* Alignment requirement for offset/length of I/O requests */
unsigned int request_alignment;
/* the block size for which the guest device expects atomicity */
int guest_block_size;
/* do we need to tell the quest if we have a volatile write cache? */
int enable_write_cache;
/* NOTE: the following infos are only hints for real hardware
drivers. They are not used by the block driver */
BlockdevOnError on_read_error, on_write_error;
bool iostatus_enabled;
BlockDeviceIoStatus iostatus;
/* the following member gives a name to every node on the bs graph. */
char node_name[32];
/* element of the list of named nodes building the graph */
@ -456,6 +448,17 @@ struct BlockDriverState {
/* threshold limit for writes, in bytes. "High water mark". */
uint64_t write_threshold_offset;
NotifierWithReturn write_threshold_notifier;
int quiesce_counter;
};
struct BlockBackendRootState {
int open_flags;
bool read_only;
BlockdevDetectZeroesOptions detect_zeroes;
char *throttle_group;
ThrottleState *throttle_state;
};
static inline BlockDriverState *backing_bs(BlockDriverState *bs)

6
include/block/throttle-groups.h
View file

@ -30,6 +30,9 @@
const char *throttle_group_get_name(BlockDriverState *bs);
ThrottleState *throttle_group_incref(const char *name);
void throttle_group_unref(ThrottleState *ts);
void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg);
void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg);
@ -40,7 +43,4 @@ void coroutine_fn throttle_group_co_io_limits_intercept(BlockDriverState *bs,
unsigned int bytes,
bool is_write);
void throttle_group_lock(BlockDriverState *bs);
void throttle_group_unlock(BlockDriverState *bs);
#endif

1
include/qemu/typedefs.h
View file

@ -11,6 +11,7 @@ typedef struct AddressSpace AddressSpace;
typedef struct AioContext AioContext;
typedef struct AudioState AudioState;
typedef struct BlockBackend BlockBackend;
typedef struct BlockBackendRootState BlockBackendRootState;
typedef struct BlockDriverState BlockDriverState;
typedef struct BusClass BusClass;
typedef struct BusState BusState;

13
include/sysemu/block-backend.h
View file

@ -72,10 +72,16 @@ BlockBackend *blk_by_name(const char *name);
BlockBackend *blk_next(BlockBackend *blk);
BlockDriverState *blk_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk);
void blk_iostatus_enable(BlockBackend *blk);
bool blk_iostatus_is_enabled(const BlockBackend *blk);
BlockDeviceIoStatus blk_iostatus(const BlockBackend *blk);
void blk_iostatus_disable(BlockBackend *blk);
void blk_iostatus_reset(BlockBackend *blk);
void blk_iostatus_set_err(BlockBackend *blk, int error);
int blk_attach_dev(BlockBackend *blk, void *dev);
void blk_attach_dev_nofail(BlockBackend *blk, void *dev);
void blk_detach_dev(BlockBackend *blk, void *dev);
@ -120,6 +126,8 @@ int blk_flush(BlockBackend *blk);
int blk_flush_all(void);
void blk_drain(BlockBackend *blk);
void blk_drain_all(void);
void blk_set_on_error(BlockBackend *blk, BlockdevOnError on_read_error,
BlockdevOnError on_write_error);
BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
int error);
@ -130,7 +138,8 @@ int blk_is_sg(BlockBackend *blk);
int blk_enable_write_cache(BlockBackend *blk);
void blk_set_enable_write_cache(BlockBackend *blk, bool wce);
void blk_invalidate_cache(BlockBackend *blk, Error **errp);
int blk_is_inserted(BlockBackend *blk);
bool blk_is_inserted(BlockBackend *blk);
bool blk_is_available(BlockBackend *blk);
void blk_lock_medium(BlockBackend *blk, bool locked);
void blk_eject(BlockBackend *blk, bool eject_flag);
int blk_get_flags(BlockBackend *blk);
@ -155,6 +164,8 @@ void blk_add_close_notifier(BlockBackend *blk, Notifier *notify);
void blk_io_plug(BlockBackend *blk);
void blk_io_unplug(BlockBackend *blk);
BlockAcctStats *blk_get_stats(BlockBackend *blk);
BlockBackendRootState *blk_get_root_state(BlockBackend *blk);
void blk_update_root_state(BlockBackend *blk);
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);

3
iohandler.c
View file

@ -55,7 +55,8 @@ void qemu_set_fd_handler(int fd,
void *opaque)
{
iohandler_init();
aio_set_fd_handler(iohandler_ctx, fd, fd_read, fd_write, opaque);
aio_set_fd_handler(iohandler_ctx, fd, false,
fd_read, fd_write, opaque);
}
/* reaping of zombies. right now we're not passing the status to

5
migration/block.c
View file

@ -808,6 +808,11 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
return -EINVAL;
}
bs = blk_bs(blk);
if (!bs) {
fprintf(stderr, "Block device %s has no medium\n",
device_name);
return -EINVAL;
}
if (bs != bs_prev) {
bs_prev = bs;

4
monitor.c
View file

@ -4145,6 +4145,10 @@ int monitor_read_block_device_key(Monitor *mon, const char *device,
monitor_printf(mon, "Device not found %s\n", device);
return -1;
}
if (!blk_bs(blk)) {
monitor_printf(mon, "Device '%s' has no medium\n", device);
return -1;
}
bdrv_add_key(blk_bs(blk), NULL, &err);
if (err) {

4
nbd.c
View file

@ -1446,6 +1446,7 @@ static void nbd_set_handlers(NBDClient *client)
{
if (client->exp && client->exp->ctx) {
aio_set_fd_handler(client->exp->ctx, client->sock,
true,
client->can_read ? nbd_read : NULL,
client->send_coroutine ? nbd_restart_write : NULL,
client);
@ -1455,7 +1456,8 @@ static void nbd_set_handlers(NBDClient *client)
static void nbd_unset_handlers(NBDClient *client)
{
if (client->exp && client->exp->ctx) {
aio_set_fd_handler(client->exp->ctx, client->sock, NULL, NULL, NULL);
aio_set_fd_handler(client->exp->ctx, client->sock,
true, NULL, NULL, NULL);
}
}

22
qapi/block-core.json
View file

@ -215,10 +215,11 @@
# @drv: the name of the block format used to open the backing device. As of
# 0.14.0 this can be: 'blkdebug', 'bochs', 'cloop', 'cow', 'dmg',
# 'file', 'file', 'ftp', 'ftps', 'host_cdrom', 'host_device',
# 'host_floppy', 'http', 'https', 'nbd', 'parallels', 'qcow',
# 'http', 'https', 'nbd', 'parallels', 'qcow',
# 'qcow2', 'raw', 'tftp', 'vdi', 'vmdk', 'vpc', 'vvfat'
# 2.2: 'archipelago' added, 'cow' dropped
# 2.3: 'host_floppy' deprecated
# 2.5: 'host_floppy' dropped
#
# @backing_file: #optional the name of the backing file (for copy-on-write)
#
@ -1373,15 +1374,14 @@
#
# Drivers that are supported in block device operations.
#
# @host_device, @host_cdrom, @host_floppy: Since 2.1
# @host_floppy: deprecated since 2.3
# @host_device, @host_cdrom: Since 2.1
#
# Since: 2.0
##
{ 'enum': 'BlockdevDriver',
'data': [ 'archipelago', 'blkdebug', 'blkverify', 'bochs', 'cloop',
'dmg', 'file', 'ftp', 'ftps', 'host_cdrom', 'host_device',
'host_floppy', 'http', 'https', 'null-aio', 'null-co', 'parallels',
'http', 'https', 'null-aio', 'null-co', 'parallels',
'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'tftp', 'vdi', 'vhdx',
'vmdk', 'vpc', 'vvfat' ] }
@ -1393,9 +1393,12 @@
#
# @driver: block driver name
# @id: #optional id by which the new block device can be referred to.
# This is a required option on the top level of blockdev-add, and
# currently not allowed on any other level.
# @node-name: #optional the name of a block driver state node (Since 2.0)
# This option is only allowed on the top level of blockdev-add.
# A BlockBackend will be created by blockdev-add if and only if
# this option is given.
# @node-name: #optional the name of a block driver state node (Since 2.0).
# This option is required on the top level of blockdev-add if
# the @id option is not given there.
# @discard: #optional discard-related options (default: ignore)
# @cache: #optional cache-related options
# @aio: #optional AIO backend (default: threads)
@ -1816,7 +1819,6 @@
# TODO gluster: Wait for structured options
'host_cdrom': 'BlockdevOptionsFile',
'host_device':'BlockdevOptionsFile',
'host_floppy':'BlockdevOptionsFile',
'http': 'BlockdevOptionsFile',
'https': 'BlockdevOptionsFile',
# TODO iscsi: Wait for structured options
@ -1860,7 +1862,9 @@
##
# @blockdev-add:
#
# Creates a new block device.
# Creates a new block device. If the @id option is given at the top level, a
# BlockBackend will be created; otherwise, @node-name is mandatory at the top
# level and no BlockBackend will be created.
#
# This command is still a work in progress. It doesn't support all
# block drivers, it lacks a matching blockdev-del, and more. Stay

4
qmp-commands.hx
View file

@ -2520,8 +2520,8 @@ Each json-object contain the following:
- "wr_total_time_ns": total time spend on writes in nano-seconds (json-int)
- "rd_total_time_ns": total time spend on reads in nano-seconds (json-int)
- "flush_total_time_ns": total time spend on cache flushes in nano-seconds (json-int)
- "wr_highest_offset": Highest offset of a sector written since the
BlockDriverState has been opened (json-int)
- "wr_highest_offset": The offset after the greatest byte written to the
BlockDriverState since it has been opened (json-int)
- "rd_merged": number of read requests that have been merged into
another request (json-int)
- "wr_merged": number of write requests that have been merged into

6
qmp.c
View file

@ -24,6 +24,7 @@
#include "sysemu/arch_init.h"
#include "hw/qdev.h"
#include "sysemu/blockdev.h"
#include "sysemu/block-backend.h"
#include "qom/qom-qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qobject.h"
@ -170,6 +171,7 @@ SpiceInfo *qmp_query_spice(Error **errp)
void qmp_cont(Error **errp)
{
Error *local_err = NULL;
BlockBackend *blk;
BlockDriverState *bs;
if (runstate_needs_reset()) {
@ -179,8 +181,8 @@ void qmp_cont(Error **errp)
return;
}
for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
bdrv_iostatus_reset(bs);
for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
blk_iostatus_reset(blk);
}
for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
bdrv_add_key(bs, NULL, &local_err);

4
tests/fdc-test.c
View file

@ -304,9 +304,7 @@ static void test_media_insert(void)
qmp_discard_response("{'execute':'change', 'arguments':{"
" 'device':'floppy0', 'target': %s, 'arg': 'raw' }}",
test_image);
qmp_discard_response(""); /* ignore event
(FIXME open -> open transition?!) */
qmp_discard_response(""); /* ignore event */
qmp_discard_response(""); /* ignore event (open -> close) */
dir = inb(FLOPPY_BASE + reg_dir);
assert_bit_set(dir, DSKCHG);

54
tests/qemu-iotests/071
View file

@ -104,8 +104,17 @@ echo
echo "=== Testing blkdebug on existing block device ==="
echo
run_qemu -drive "file=$TEST_IMG,format=raw,if=none,id=drive0" <<EOF
run_qemu <<EOF
{ "execute": "qmp_capabilities" }
{ "execute": "blockdev-add",
"arguments": {
"options": {
"node-name": "drive0",
"driver": "file",
"filename": "$TEST_IMG"
}
}
}
{ "execute": "blockdev-add",
"arguments": {
"options": {
@ -133,8 +142,20 @@ echo
echo "=== Testing blkverify on existing block device ==="
echo
run_qemu -drive "file=$TEST_IMG,format=$IMGFMT,if=none,id=drive0" <<EOF
run_qemu <<EOF
{ "execute": "qmp_capabilities" }
{ "execute": "blockdev-add",
"arguments": {
"options": {
"node-name": "drive0",
"driver": "$IMGFMT",
"file": {
"driver": "file",
"filename": "$TEST_IMG"
}
}
}
}
{ "execute": "blockdev-add",
"arguments": {
"options": {
@ -142,11 +163,8 @@ run_qemu -drive "file=$TEST_IMG,format=$IMGFMT,if=none,id=drive0" <<EOF
"id": "drive0-verify",
"test": "drive0",
"raw": {
"driver": "raw",
"file": {
"driver": "file",
"filename": "$TEST_IMG.base"
}
"driver": "file",
"filename": "$TEST_IMG.base"
}
}
}
@ -163,8 +181,17 @@ echo
echo "=== Testing blkverify on existing raw block device ==="
echo
run_qemu -drive "file=$TEST_IMG.base,format=raw,if=none,id=drive0" <<EOF
run_qemu <<EOF
{ "execute": "qmp_capabilities" }
{ "execute": "blockdev-add",
"arguments": {
"options": {
"node-name": "drive0",
"driver": "file",
"filename": "$TEST_IMG.base"
}
}
}
{ "execute": "blockdev-add",
"arguments": {
"options": {
@ -193,8 +220,17 @@ echo
echo "=== Testing blkdebug's set-state through QMP ==="
echo
run_qemu -drive "file=$TEST_IMG,format=raw,if=none,id=drive0" <<EOF
run_qemu <<EOF
{ "execute": "qmp_capabilities" }
{ "execute": "blockdev-add",
"arguments": {
"options": {
"node-name": "drive0",
"driver": "file",
"filename": "$TEST_IMG"
}
}
}
{ "execute": "blockdev-add",
"arguments": {
"options": {

12
tests/qemu-iotests/071.out
View file

@ -42,10 +42,11 @@ read failed: Input/output error
=== Testing blkdebug on existing block device ===
Testing: -drive file=TEST_DIR/t.IMGFMT,format=raw,if=none,id=drive0
Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
read failed: Input/output error
{"return": ""}
{"return": {}}
@ -56,28 +57,31 @@ QEMU_PROG: Failed to flush the refcount block cache: Input/output error
=== Testing blkverify on existing block device ===
Testing: -drive file=TEST_DIR/t.IMGFMT,format=IMGFMT,if=none,id=drive0
Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
=== Testing blkverify on existing raw block device ===
Testing: -drive file=TEST_DIR/t.IMGFMT.base,format=raw,if=none,id=drive0
Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
blkverify: read sector_num=0 nb_sectors=1 contents mismatch in sector 0
=== Testing blkdebug's set-state through QMP ===
Testing: -drive file=TEST_DIR/t.IMGFMT,format=raw,if=none,id=drive0
Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"return": {}}
read 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
{"return": ""}

18
tests/qemu-iotests/081
View file

@ -102,8 +102,20 @@ $QEMU_IO -c "open -o $quorum" -c "read -P 0x32 0 $size" | _filter_qemu_io
echo
echo "== checking mixed reference/option specification =="
run_qemu -drive "file=$TEST_DIR/2.raw,format=$IMGFMT,if=none,id=drive2" <<EOF
run_qemu <<EOF
{ "execute": "qmp_capabilities" }
{ "execute": "blockdev-add",
"arguments": {
"options": {
"node-name": "drive2",
"driver": "$IMGFMT",
"file": {
"driver": "file",
"filename": "$TEST_DIR/2.raw"
}
}
}
}
{ "execute": "blockdev-add",
"arguments": {
"options": {
@ -112,7 +124,7 @@ run_qemu -drive "file=$TEST_DIR/2.raw,format=$IMGFMT,if=none,id=drive2" <<EOF
"vote-threshold": 2,
"children": [
{
"driver": "raw",
"driver": "$IMGFMT",
"file": {
"driver": "file",
"filename": "$TEST_DIR/1.raw"
@ -120,7 +132,7 @@ run_qemu -drive "file=$TEST_DIR/2.raw,format=$IMGFMT,if=none,id=drive2" <<EOF
},
"drive2",
{
"driver": "raw",
"driver": "$IMGFMT",
"file": {
"driver": "file",
"filename": "$TEST_DIR/3.raw"

5
tests/qemu-iotests/081.out
View file

@ -26,11 +26,12 @@ read 10485760/10485760 bytes at offset 0
10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== checking mixed reference/option specification ==
Testing: -drive file=TEST_DIR/2.IMGFMT,format=IMGFMT,if=none,id=drive2
Testing:
QMP_VERSION
{"return": {}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "QUORUM_REPORT_BAD", "data": {"node-name": "NODE_NAME", "sectors-count": 20480, "sector-num": 0}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "QUORUM_REPORT_BAD", "data": {"node-name": "drive2", "sectors-count": 20480, "sector-num": 0}}
read 10485760/10485760 bytes at offset 0
10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
{"return": ""}

2
tests/qemu-iotests/087
View file

@ -54,7 +54,7 @@ size=128M
_make_test_img $size
echo
echo === Missing ID ===
echo === Missing ID and node-name ===
echo
run_qemu <<EOF

4
tests/qemu-iotests/087.out
View file

@ -1,12 +1,12 @@
QA output created by 087
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
=== Missing ID ===
=== Missing ID and node-name ===
Testing:
QMP_VERSION
{"return": {}}
{"error": {"class": "GenericError", "desc": "Block device needs an ID"}}
{"error": {"class": "GenericError", "desc": "'id' and/or 'node-name' need to be specified for the root node"}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN"}

82
tests/test-aio.c
View file

@ -118,6 +118,12 @@ static void *test_acquire_thread(void *opaque)
return NULL;
}
static void set_event_notifier(AioContext *ctx, EventNotifier *notifier,
EventNotifierHandler *handler)
{
aio_set_event_notifier(ctx, notifier, false, handler);
}
static void dummy_notifier_read(EventNotifier *unused)
{
g_assert(false); /* should never be invoked */
@ -131,7 +137,7 @@ static void test_acquire(void)
/* Dummy event notifier ensures aio_poll() will block */
event_notifier_init(&notifier, false);
aio_set_event_notifier(ctx, &notifier, dummy_notifier_read);
set_event_notifier(ctx, &notifier, dummy_notifier_read);
g_assert(!aio_poll(ctx, false)); /* consume aio_notify() */
qemu_mutex_init(&data.start_lock);
@ -149,7 +155,7 @@ static void test_acquire(void)
aio_context_release(ctx);
qemu_thread_join(&thread);
aio_set_event_notifier(ctx, &notifier, NULL);
set_event_notifier(ctx, &notifier, NULL);
event_notifier_cleanup(&notifier);
g_assert(data.thread_acquired);
@ -308,11 +314,11 @@ static void test_set_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 0 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
event_notifier_cleanup(&data.e);
@ -322,7 +328,7 @@ static void test_wait_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 1);
@ -336,7 +342,7 @@ static void test_wait_event_notifier(void)
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
@ -347,7 +353,7 @@ static void test_flush_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 10);
@ -363,18 +369,41 @@ static void test_flush_event_notifier(void)
g_assert_cmpint(data.active, ==, 0);
g_assert(!aio_poll(ctx, false));
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
event_notifier_cleanup(&data.e);
}
static void test_aio_external_client(void)
{
int i, j;
for (i = 1; i < 3; i++) {
EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, true, event_ready_cb);
event_notifier_set(&data.e);
for (j = 0; j < i; j++) {
aio_disable_external(ctx);
}
for (j = 0; j < i; j++) {
assert(!aio_poll(ctx, false));
assert(event_notifier_test_and_clear(&data.e));
event_notifier_set(&data.e);
aio_enable_external(ctx);
}
assert(aio_poll(ctx, false));
event_notifier_cleanup(&data.e);
}
}
static void test_wait_event_notifier_noflush(void)
{
EventNotifierTestData data = { .n = 0 };
EventNotifierTestData dummy = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
@ -387,7 +416,7 @@ static void test_wait_event_notifier_noflush(void)
/* An active event notifier forces aio_poll to look at EventNotifiers. */
event_notifier_init(&dummy.e, false);
aio_set_event_notifier(ctx, &dummy.e, event_ready_cb);
set_event_notifier(ctx, &dummy.e, event_ready_cb);
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, false));
@ -407,10 +436,10 @@ static void test_wait_event_notifier_noflush(void)
g_assert_cmpint(dummy.n, ==, 1);
g_assert_cmpint(dummy.active, ==, 0);
aio_set_event_notifier(ctx, &dummy.e, NULL);
set_event_notifier(ctx, &dummy.e, NULL);
event_notifier_cleanup(&dummy.e);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
@ -428,7 +457,7 @@ static void test_timer_schedule(void)
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
event_notifier_init(&e, false);
aio_set_event_notifier(ctx, &e, dummy_io_handler_read);
set_event_notifier(ctx, &e, dummy_io_handler_read);
aio_poll(ctx, false);
aio_timer_init(ctx, &data.timer, data.clock_type,
@ -467,7 +496,7 @@ static void test_timer_schedule(void)
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
aio_set_event_notifier(ctx, &e, NULL);
set_event_notifier(ctx, &e, NULL);
event_notifier_cleanup(&e);
timer_del(&data.timer);
@ -638,11 +667,11 @@ static void test_source_set_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 0 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
event_notifier_cleanup(&data.e);
@ -652,7 +681,7 @@ static void test_source_wait_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 1);
@ -666,7 +695,7 @@ static void test_source_wait_event_notifier(void)
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
@ -677,7 +706,7 @@ static void test_source_flush_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 10);
@ -693,7 +722,7 @@ static void test_source_flush_event_notifier(void)
g_assert_cmpint(data.active, ==, 0);
g_assert(!g_main_context_iteration(NULL, false));
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
event_notifier_cleanup(&data.e);
}
@ -704,7 +733,7 @@ static void test_source_wait_event_notifier_noflush(void)
EventNotifierTestData dummy = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
aio_set_event_notifier(ctx, &data.e, event_ready_cb);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
@ -717,7 +746,7 @@ static void test_source_wait_event_notifier_noflush(void)
/* An active event notifier forces aio_poll to look at EventNotifiers. */
event_notifier_init(&dummy.e, false);
aio_set_event_notifier(ctx, &dummy.e, event_ready_cb);
set_event_notifier(ctx, &dummy.e, event_ready_cb);
event_notifier_set(&data.e);
g_assert(g_main_context_iteration(NULL, false));
@ -737,10 +766,10 @@ static void test_source_wait_event_notifier_noflush(void)
g_assert_cmpint(dummy.n, ==, 1);
g_assert_cmpint(dummy.active, ==, 0);
aio_set_event_notifier(ctx, &dummy.e, NULL);
set_event_notifier(ctx, &dummy.e, NULL);
event_notifier_cleanup(&dummy.e);
aio_set_event_notifier(ctx, &data.e, NULL);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 2);
@ -759,7 +788,7 @@ static void test_source_timer_schedule(void)
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
event_notifier_init(&e, false);
aio_set_event_notifier(ctx, &e, dummy_io_handler_read);
set_event_notifier(ctx, &e, dummy_io_handler_read);
do {} while (g_main_context_iteration(NULL, false));
aio_timer_init(ctx, &data.timer, data.clock_type,
@ -784,7 +813,7 @@ static void test_source_timer_schedule(void)
g_assert_cmpint(data.n, ==, 2);
g_assert(qemu_clock_get_ns(data.clock_type) > expiry);
aio_set_event_notifier(ctx, &e, NULL);
set_event_notifier(ctx, &e, NULL);
event_notifier_cleanup(&e);
timer_del(&data.timer);
@ -826,6 +855,7 @@ int main(int argc, char **argv)
g_test_add_func("/aio/event/wait", test_wait_event_notifier);
g_test_add_func("/aio/event/wait/no-flush-cb", test_wait_event_notifier_noflush);
g_test_add_func("/aio/event/flush", test_flush_event_notifier);
g_test_add_func("/aio/external-client", test_aio_external_client);
g_test_add_func("/aio/timer/schedule", test_timer_schedule);
g_test_add_func("/aio-gsource/flush", test_source_flush);