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Block layer patches:

Browse source 
- block: Fix crash with qcow2 partial cluster COW with small cluster
   sizes (misaligned write requests with BDRV_REQ_NO_FALLBACK)
 - qcow2: Fix integer overflow potentially causing corruption with huge
   requests
 - vhdx: Detect truncated image files
 - tools: Support help options for --object
 - Various block-related replay improvements
 - iotests/028: Fix for long $TEST_DIRs
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- block: Fix crash with qcow2 partial cluster COW with small cluster
  sizes (misaligned write requests with BDRV_REQ_NO_FALLBACK)
- qcow2: Fix integer overflow potentially causing corruption with huge
  requests
- vhdx: Detect truncated image files
- tools: Support help options for --object
- Various block-related replay improvements
- iotests/028: Fix for long $TEST_DIRs

# gpg: Signature made Mon 14 Oct 2019 17:02:54 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  iotests: Test large write request to qcow2 file
  qcow2: Limit total allocation range to INT_MAX
  qemu-nbd: Support help options for --object
  qemu-img: Support help options for --object
  qemu-io: Support help options for --object
  vl: Split off user_creatable_print_help()
  iotests/028: Fix for long $TEST_DIRs
  block: Reject misaligned write requests with BDRV_REQ_NO_FALLBACK
  replay: add BH oneshot event for block layer
  replay: finish record/replay before closing the disks
  replay: don't drain/flush bdrv queue while RR is working
  replay: update docs for record/replay with block devices
  replay: disable default snapshot for record/replay
  block: implement bdrv_snapshot_goto for blkreplay
  block/vhdx: add check for truncated image files

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-10-15 13:25:05 +01:00
parent 9020e9526c a1406a9262
commit 3af78db681
32 changed files with 504 additions and 111 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
block/blkreplay.c
View file

@ -126,6 +126,12 @@ static int coroutine_fn blkreplay_co_flush(BlockDriverState *bs)
return ret;
}
static int blkreplay_snapshot_goto(BlockDriverState *bs,
const char *snapshot_id)
{
return bdrv_snapshot_goto(bs->file->bs, snapshot_id, NULL);
}
static BlockDriver bdrv_blkreplay = {
.format_name = "blkreplay",
.instance_size = 0,
@ -140,6 +146,8 @@ static BlockDriver bdrv_blkreplay = {
.bdrv_co_pwrite_zeroes = blkreplay_co_pwrite_zeroes,
.bdrv_co_pdiscard = blkreplay_co_pdiscard,
.bdrv_co_flush = blkreplay_co_flush,
.bdrv_snapshot_goto = blkreplay_snapshot_goto,
};
static void bdrv_blkreplay_init(void)

9
block/block-backend.c
View file

@ -18,6 +18,8 @@
#include "hw/qdev-core.h"
#include "sysemu/blockdev.h"
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
#include "sysemu/replay.h"
#include "qapi/error.h"
#include "qapi/qapi-events-block.h"
#include "qemu/id.h"
@ -1306,7 +1308,8 @@ BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
acb->blk = blk;
acb->ret = ret;
aio_bh_schedule_oneshot(blk_get_aio_context(blk), error_callback_bh, acb);
replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
error_callback_bh, acb);
return &acb->common;
}
@ -1362,8 +1365,8 @@ static BlockAIOCB *blk_aio_prwv(BlockBackend *blk, int64_t offset, int bytes,
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {
aio_bh_schedule_oneshot(blk_get_aio_context(blk),
blk_aio_complete_bh, acb);
replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
blk_aio_complete_bh, acb);
}
return &acb->common;

39
block/io.c
View file

@ -33,6 +33,7 @@
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "sysemu/replay.h"
#define NOT_DONE 0x7fffffff /* used while emulated sync operation in progress */
@ -368,8 +369,8 @@ static void coroutine_fn bdrv_co_yield_to_drain(BlockDriverState *bs,
if (bs) {
bdrv_inc_in_flight(bs);
}
aio_bh_schedule_oneshot(bdrv_get_aio_context(bs),
bdrv_co_drain_bh_cb, &data);
replay_bh_schedule_oneshot_event(bdrv_get_aio_context(bs),
bdrv_co_drain_bh_cb, &data);
qemu_coroutine_yield();
/* If we are resumed from some other event (such as an aio completion or a
@ -600,6 +601,15 @@ void bdrv_drain_all_begin(void)
return;
}
/*
* bdrv queue is managed by record/replay,
* waiting for finishing the I/O requests may
* be infinite
*/
if (replay_events_enabled()) {
return;
}
/* AIO_WAIT_WHILE() with a NULL context can only be called from the main
* loop AioContext, so make sure we're in the main context. */
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
@ -629,6 +639,15 @@ void bdrv_drain_all_end(void)
BlockDriverState *bs = NULL;
int drained_end_counter = 0;
/*
* bdrv queue is managed by record/replay,
* waiting for finishing the I/O requests may
* be endless
*/
if (replay_events_enabled()) {
return;
}
while ((bs = bdrv_next_all_states(bs))) {
AioContext *aio_context = bdrv_get_aio_context(bs);
@ -2071,6 +2090,13 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
return ret;
}
/* If the request is misaligned then we can't make it efficient */
if ((flags & BDRV_REQ_NO_FALLBACK) &&
!QEMU_IS_ALIGNED(offset | bytes, align))
{
return -ENOTSUP;
}
bdrv_inc_in_flight(bs);
/*
* Align write if necessary by performing a read-modify-write cycle.
@ -2124,6 +2150,15 @@ int bdrv_flush_all(void)
BlockDriverState *bs = NULL;
int result = 0;
/*
* bdrv queue is managed by record/replay,
* creating new flush request for stopping
* the VM may break the determinism
*/
if (replay_events_enabled()) {
return result;
}
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
int ret;

5
block/iscsi.c
View file

@ -40,6 +40,7 @@
#include "qemu/module.h"
#include "qemu/option.h"
#include "qemu/uuid.h"
#include "sysemu/replay.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-misc.h"
#include "qapi/qmp/qdict.h"
@ -280,8 +281,8 @@ iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
}
if (iTask->co) {
aio_bh_schedule_oneshot(iTask->iscsilun->aio_context,
iscsi_co_generic_bh_cb, iTask);
replay_bh_schedule_oneshot_event(iTask->iscsilun->aio_context,
iscsi_co_generic_bh_cb, iTask);
} else {
iTask->complete = 1;
}

6
block/nfs.c
View file

@ -37,6 +37,8 @@
#include "qemu/option.h"
#include "qemu/uri.h"
#include "qemu/cutils.h"
#include "sysemu/sysemu.h"
#include "sysemu/replay.h"
#include "qapi/qapi-visit-block-core.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qstring.h"
@ -257,8 +259,8 @@ nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
if (task->ret < 0) {
error_report("NFS Error: %s", nfs_get_error(nfs));
}
aio_bh_schedule_oneshot(task->client->aio_context,
nfs_co_generic_bh_cb, task);
replay_bh_schedule_oneshot_event(task->client->aio_context,
nfs_co_generic_bh_cb, task);
}
static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,

4
block/null.c
View file

@ -17,6 +17,7 @@
#include "qemu/module.h"
#include "qemu/option.h"
#include "block/block_int.h"
#include "sysemu/replay.h"
#define NULL_OPT_LATENCY "latency-ns"
#define NULL_OPT_ZEROES "read-zeroes"
@ -179,7 +180,8 @@ static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,
timer_mod_ns(&acb->timer,
qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + s->latency_ns);
} else {
aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), null_bh_cb, acb);
replay_bh_schedule_oneshot_event(bdrv_get_aio_context(bs),
null_bh_cb, acb);
}
return &acb->common;
}

6
block/nvme.c
View file

@ -23,6 +23,7 @@
#include "qemu/option.h"
#include "qemu/vfio-helpers.h"
#include "block/block_int.h"
#include "sysemu/replay.h"
#include "trace.h"
#include "block/nvme.h"
@ -351,7 +352,8 @@ static bool nvme_process_completion(BDRVNVMeState *s, NVMeQueuePair *q)
smp_mb_release();
*q->cq.doorbell = cpu_to_le32(q->cq.head);
if (!qemu_co_queue_empty(&q->free_req_queue)) {
aio_bh_schedule_oneshot(s->aio_context, nvme_free_req_queue_cb, q);
replay_bh_schedule_oneshot_event(s->aio_context,
nvme_free_req_queue_cb, q);
}
}
q->busy = false;
@ -935,7 +937,7 @@ static void nvme_rw_cb(void *opaque, int ret)
/* The rw coroutine hasn't yielded, don't try to enter. */
return;
}
aio_bh_schedule_oneshot(data->ctx, nvme_rw_cb_bh, data);
replay_bh_schedule_oneshot_event(data->ctx, nvme_rw_cb_bh, data);
}
static coroutine_fn int nvme_co_prw_aligned(BlockDriverState *bs,

5
block/qcow2-cluster.c
View file

@ -1330,6 +1330,9 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
nb_clusters = MIN(nb_clusters, s->l2_slice_size - l2_index);
assert(nb_clusters <= INT_MAX);
/* Limit total allocation byte count to INT_MAX */
nb_clusters = MIN(nb_clusters, INT_MAX >> s->cluster_bits);
/* Find L2 entry for the first involved cluster */
ret = get_cluster_table(bs, guest_offset, &l2_slice, &l2_index);
if (ret < 0) {
@ -1412,7 +1415,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
* request actually writes to (excluding COW at the end)
*/
uint64_t requested_bytes = *bytes + offset_into_cluster(s, guest_offset);
int avail_bytes = MIN(INT_MAX, nb_clusters << s->cluster_bits);
int avail_bytes = nb_clusters << s->cluster_bits;
int nb_bytes = MIN(requested_bytes, avail_bytes);
QCowL2Meta *old_m = *m;

5
block/rbd.c
View file

@ -22,6 +22,7 @@
#include "block/qdict.h"
#include "crypto/secret.h"
#include "qemu/cutils.h"
#include "sysemu/replay.h"
#include "qapi/qmp/qstring.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
@ -884,8 +885,8 @@ static void rbd_finish_aiocb(rbd_completion_t c, RADOSCB *rcb)
rcb->ret = rbd_aio_get_return_value(c);
rbd_aio_release(c);
aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs),
rbd_finish_bh, rcb);
replay_bh_schedule_oneshot_event(bdrv_get_aio_context(acb->common.bs),
rbd_finish_bh, rcb);
}
static int rbd_aio_discard_wrapper(rbd_image_t image,

120
block/vhdx.c
View file

@ -24,6 +24,7 @@
#include "qemu/option.h"
#include "qemu/crc32c.h"
#include "qemu/bswap.h"
#include "qemu/error-report.h"
#include "vhdx.h"
#include "migration/blocker.h"
#include "qemu/uuid.h"
@ -235,6 +236,9 @@ static int vhdx_region_check(BDRVVHDXState *s, uint64_t start, uint64_t length)
end = start + length;
QLIST_FOREACH(r, &s->regions, entries) {
if (!((start >= r->end) || (end <= r->start))) {
error_report("VHDX region %" PRIu64 "-%" PRIu64 " overlaps with "
"region %" PRIu64 "-%." PRIu64, start, end, r->start,
r->end);
ret = -EINVAL;
goto exit;
}
@ -877,6 +881,95 @@ static void vhdx_calc_bat_entries(BDRVVHDXState *s)
}
static int vhdx_check_bat_entries(BlockDriverState *bs, int *errcnt)
{
BDRVVHDXState *s = bs->opaque;
int64_t image_file_size = bdrv_getlength(bs->file->bs);
uint64_t payblocks = s->chunk_ratio;
uint64_t i;
int ret = 0;
if (image_file_size < 0) {
error_report("Could not determinate VHDX image file size.");
return image_file_size;
}
for (i = 0; i < s->bat_entries; i++) {
if ((s->bat[i] & VHDX_BAT_STATE_BIT_MASK) ==
PAYLOAD_BLOCK_FULLY_PRESENT) {
uint64_t offset = s->bat[i] & VHDX_BAT_FILE_OFF_MASK;
/*
* Allow that the last block exists only partially. The VHDX spec
* states that the image file can only grow in blocksize increments,
* but QEMU created images with partial last blocks in the past.
*/
uint32_t block_length = MIN(s->block_size,
bs->total_sectors * BDRV_SECTOR_SIZE - i * s->block_size);
/*
* Check for BAT entry overflow.
*/
if (offset > INT64_MAX - s->block_size) {
error_report("VHDX BAT entry %" PRIu64 " offset overflow.", i);
ret = -EINVAL;
if (!errcnt) {
break;
}
(*errcnt)++;
}
/*
* Check if fully allocated BAT entries do not reside after
* end of the image file.
*/
if (offset >= image_file_size) {
error_report("VHDX BAT entry %" PRIu64 " start offset %" PRIu64
" points after end of file (%" PRIi64 "). Image"
" has probably been truncated.",
i, offset, image_file_size);
ret = -EINVAL;
if (!errcnt) {
break;
}
(*errcnt)++;
} else if (offset + block_length > image_file_size) {
error_report("VHDX BAT entry %" PRIu64 " end offset %" PRIu64
" points after end of file (%" PRIi64 "). Image"
" has probably been truncated.",
i, offset + block_length - 1, image_file_size);
ret = -EINVAL;
if (!errcnt) {
break;
}
(*errcnt)++;
}
/*
* verify populated BAT field file offsets against
* region table and log entries
*/
if (payblocks--) {
/* payload bat entries */
int ret2;
ret2 = vhdx_region_check(s, offset, s->block_size);
if (ret2 < 0) {
ret = -EINVAL;
if (!errcnt) {
break;
}
(*errcnt)++;
}
} else {
payblocks = s->chunk_ratio;
/*
* Once differencing files are supported, verify sector bitmap
* blocks here
*/
}
}
}
return ret;
}
static void vhdx_close(BlockDriverState *bs)
{
BDRVVHDXState *s = bs->opaque;
@ -981,25 +1074,15 @@ static int vhdx_open(BlockDriverState *bs, QDict *options, int flags,
goto fail;
}
uint64_t payblocks = s->chunk_ratio;
/* endian convert, and verify populated BAT field file offsets against
* region table and log entries */
/* endian convert populated BAT field entires */
for (i = 0; i < s->bat_entries; i++) {
s->bat[i] = le64_to_cpu(s->bat[i]);
if (payblocks--) {
/* payload bat entries */
if ((s->bat[i] & VHDX_BAT_STATE_BIT_MASK) ==
PAYLOAD_BLOCK_FULLY_PRESENT) {
ret = vhdx_region_check(s, s->bat[i] & VHDX_BAT_FILE_OFF_MASK,
s->block_size);
if (ret < 0) {
goto fail;
}
}
} else {
payblocks = s->chunk_ratio;
/* Once differencing files are supported, verify sector bitmap
* blocks here */
}
if (!(flags & BDRV_O_CHECK)) {
ret = vhdx_check_bat_entries(bs, NULL);
if (ret < 0) {
goto fail;
}
}
@ -2072,6 +2155,9 @@ static int coroutine_fn vhdx_co_check(BlockDriverState *bs,
if (s->log_replayed_on_open) {
result->corruptions_fixed++;
}
vhdx_check_bat_entries(bs, &result->corruptions);
return 0;
}

5
block/vxhs.c
View file

@ -22,6 +22,7 @@
#include "qapi/error.h"
#include "qemu/uuid.h"
#include "crypto/tlscredsx509.h"
#include "sysemu/replay.h"
#define VXHS_OPT_FILENAME "filename"
#define VXHS_OPT_VDISK_ID "vdisk-id"
@ -105,8 +106,8 @@ static void vxhs_iio_callback(void *ctx, uint32_t opcode, uint32_t error)
trace_vxhs_iio_callback(error);
}
aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs),
vxhs_complete_aio_bh, acb);
replay_bh_schedule_oneshot_event(bdrv_get_aio_context(acb->common.bs),
vxhs_complete_aio_bh, acb);
break;
default:

2
cpus.c
View file

@ -1097,7 +1097,6 @@ static int do_vm_stop(RunState state, bool send_stop)
}
bdrv_drain_all();
replay_disable_events();
ret = bdrv_flush_all();
return ret;
@ -2181,7 +2180,6 @@ int vm_prepare_start(void)
/* We are sending this now, but the CPUs will be resumed shortly later */
qapi_event_send_resume();
replay_enable_events();
cpu_enable_ticks();
runstate_set(RUN_STATE_RUNNING);
vm_state_notify(1, RUN_STATE_RUNNING);

12
docs/replay.txt
View file

@ -27,7 +27,7 @@ Usage of the record/replay:
* First, record the execution with the following command line:
qemu-system-i386 \
-icount shift=7,rr=record,rrfile=replay.bin \
-drive file=disk.qcow2,if=none,id=img-direct \
-drive file=disk.qcow2,if=none,snapshot,id=img-direct \
-drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \
-device ide-hd,drive=img-blkreplay \
-netdev user,id=net1 -device rtl8139,netdev=net1 \
@ -35,7 +35,7 @@ Usage of the record/replay:
* After recording, you can replay it by using another command line:
qemu-system-i386 \
-icount shift=7,rr=replay,rrfile=replay.bin \
-drive file=disk.qcow2,if=none,id=img-direct \
-drive file=disk.qcow2,if=none,snapshot,id=img-direct \
-drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \
-device ide-hd,drive=img-blkreplay \
-netdev user,id=net1 -device rtl8139,netdev=net1 \
@ -223,7 +223,7 @@ Block devices record/replay module intercepts calls of
bdrv coroutine functions at the top of block drivers stack.
To record and replay block operations the drive must be configured
as following:
-drive file=disk.qcow2,if=none,id=img-direct
-drive file=disk.qcow2,if=none,snapshot,id=img-direct
-drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay
-device ide-hd,drive=img-blkreplay
@ -252,6 +252,12 @@ This snapshot is created at start of recording and restored at start
of replaying. It also can be loaded while replaying to roll back
the execution.
'snapshot' flag of the disk image must be removed to save the snapshots
in the overlay (or original image) instead of using the temporary overlay.
-drive file=disk.ovl,if=none,id=img-direct
-drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay
-device ide-hd,drive=img-blkreplay
Use QEMU monitor to create additional snapshots. 'savevm <name>' command
created the snapshot and 'loadvm <name>' restores it. To prevent corruption
of the original disk image, use overlay files linked to the original images.

12
include/qom/object_interfaces.h
View file

@ -132,6 +132,18 @@ typedef bool (*user_creatable_add_opts_predicate)(const char *type);
int user_creatable_add_opts_foreach(void *opaque,
QemuOpts *opts, Error **errp);
/**
* user_creatable_print_help:
* @type: the QOM type to be added
* @opts: options to create
*
* Prints help if requested in @opts.
*
* Returns: true if @opts contained a help option and help was printed, false
* if no help option was found.
*/
bool user_creatable_print_help(const char *type, QemuOpts *opts);
/**
* user_creatable_del:
* @id: the unique ID for the object

4
include/sysemu/replay.h
View file

@ -15,6 +15,7 @@
#include "qapi/qapi-types-misc.h"
#include "qapi/qapi-types-run-state.h"
#include "qapi/qapi-types-ui.h"
#include "block/aio.h"
/* replay clock kinds */
enum ReplayClockKind {
@ -140,6 +141,9 @@ void replay_enable_events(void);
bool replay_events_enabled(void);
/*! Adds bottom half event to the queue */
void replay_bh_schedule_event(QEMUBH *bh);
/* Adds oneshot bottom half event to the queue */
void replay_bh_schedule_oneshot_event(AioContext *ctx,
QEMUBHFunc *cb, void *opaque);
/*! Adds input event to the queue */
void replay_input_event(QemuConsole *src, InputEvent *evt);
/*! Adds input sync event to the queue */

34
qemu-img.c
View file

@ -214,6 +214,14 @@ static QemuOptsList qemu_object_opts = {
},
};
static bool qemu_img_object_print_help(const char *type, QemuOpts *opts)
{
if (user_creatable_print_help(type, opts)) {
exit(0);
}
return true;
}
static QemuOptsList qemu_source_opts = {
.name = "source",
.implied_opt_name = "file",
@ -516,7 +524,7 @@ static int img_create(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
goto fail;
}
@ -766,7 +774,7 @@ static int img_check(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -979,7 +987,7 @@ static int img_commit(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -1362,7 +1370,7 @@ static int img_compare(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
ret = 2;
goto out4;
}
@ -2210,7 +2218,7 @@ static int img_convert(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
goto fail_getopt;
}
@ -2776,7 +2784,7 @@ static int img_info(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -3002,7 +3010,7 @@ static int img_map(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -3154,7 +3162,7 @@ static int img_snapshot(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -3321,7 +3329,7 @@ static int img_rebase(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -3742,7 +3750,7 @@ static int img_resize(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
return 1;
}
@ -3986,7 +3994,7 @@ static int img_amend(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
ret = -1;
goto out_no_progress;
}
@ -4630,7 +4638,7 @@ static int img_dd(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
ret = -1;
goto out;
}
@ -4907,7 +4915,7 @@ static int img_measure(int argc, char **argv)
if (qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal)) {
qemu_img_object_print_help, &error_fatal)) {
goto out;
}

9
qemu-io.c
View file

@ -475,6 +475,13 @@ static QemuOptsList qemu_object_opts = {
},
};
static bool qemu_io_object_print_help(const char *type, QemuOpts *opts)
{
if (user_creatable_print_help(type, opts)) {
exit(0);
}
return true;
}
static QemuOptsList file_opts = {
.name = "file",
@ -622,7 +629,7 @@ int main(int argc, char **argv)
qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal);
qemu_io_object_print_help, &error_fatal);
if (!trace_init_backends()) {
exit(1);

9
qemu-nbd.c
View file

@ -507,6 +507,13 @@ static QemuOptsList qemu_object_opts = {
},
};
static bool qemu_nbd_object_print_help(const char *type, QemuOpts *opts)
{
if (user_creatable_print_help(type, opts)) {
exit(0);
}
return true;
}
static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, bool list,
@ -902,7 +909,7 @@ int main(int argc, char **argv)
qemu_opts_foreach(&qemu_object_opts,
user_creatable_add_opts_foreach,
NULL, &error_fatal);
qemu_nbd_object_print_help, &error_fatal);
if (!trace_init_backends()) {
exit(1);

61
qom/object_interfaces.c
View file

@ -1,8 +1,11 @@
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qom/object_interfaces.h"
#include "qemu/help_option.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qapi/opts-visitor.h"
@ -155,6 +158,64 @@ int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp)
return 0;
}
bool user_creatable_print_help(const char *type, QemuOpts *opts)
{
ObjectClass *klass;
if (is_help_option(type)) {
GSList *l, *list;
printf("List of user creatable objects:\n");
list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
for (l = list; l != NULL; l = l->next) {
ObjectClass *oc = OBJECT_CLASS(l->data);
printf(" %s\n", object_class_get_name(oc));
}
g_slist_free(list);
return true;
}
klass = object_class_by_name(type);
if (klass && qemu_opt_has_help_opt(opts)) {
ObjectPropertyIterator iter;
ObjectProperty *prop;
GPtrArray *array = g_ptr_array_new();
int i;
object_class_property_iter_init(&iter, klass);
while ((prop = object_property_iter_next(&iter))) {
GString *str;
if (!prop->set) {
continue;
}
str = g_string_new(NULL);
g_string_append_printf(str, " %s=<%s>", prop->name, prop->type);
if (prop->description) {
if (str->len < 24) {
g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
}
g_string_append_printf(str, " - %s", prop->description);
}
g_ptr_array_add(array, g_string_free(str, false));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
if (array->len > 0) {
printf("%s options:\n", type);
} else {
printf("There are no options for %s.\n", type);
}
for (i = 0; i < array->len; i++) {
printf("%s\n", (char *)array->pdata[i]);
}
g_ptr_array_set_free_func(array, g_free);
g_ptr_array_free(array, true);
return true;
}
return false;
}
void user_creatable_del(const char *id, Error **errp)
{

16
replay/replay-events.c
View file

@ -36,6 +36,9 @@ static void replay_run_event(Event *event)
case REPLAY_ASYNC_EVENT_BH:
aio_bh_call(event->opaque);
break;
case REPLAY_ASYNC_EVENT_BH_ONESHOT:
((QEMUBHFunc *)event->opaque)(event->opaque2);
break;
case REPLAY_ASYNC_EVENT_INPUT:
qemu_input_event_send_impl(NULL, (InputEvent *)event->opaque);
qapi_free_InputEvent((InputEvent *)event->opaque);
@ -131,6 +134,17 @@ void replay_bh_schedule_event(QEMUBH *bh)
}
}
void replay_bh_schedule_oneshot_event(AioContext *ctx,
QEMUBHFunc *cb, void *opaque)
{
if (events_enabled) {
uint64_t id = replay_get_current_icount();
replay_add_event(REPLAY_ASYNC_EVENT_BH_ONESHOT, cb, opaque, id);
} else {
aio_bh_schedule_oneshot(ctx, cb, opaque);
}
}
void replay_add_input_event(struct InputEvent *event)
{
replay_add_event(REPLAY_ASYNC_EVENT_INPUT, event, NULL, 0);
@ -161,6 +175,7 @@ static void replay_save_event(Event *event, int checkpoint)
/* save event-specific data */
switch (event->event_kind) {
case REPLAY_ASYNC_EVENT_BH:
case REPLAY_ASYNC_EVENT_BH_ONESHOT:
replay_put_qword(event->id);
break;
case REPLAY_ASYNC_EVENT_INPUT:
@ -216,6 +231,7 @@ static Event *replay_read_event(int checkpoint)
/* Events that has not to be in the queue */
switch (replay_state.read_event_kind) {
case REPLAY_ASYNC_EVENT_BH:
case REPLAY_ASYNC_EVENT_BH_ONESHOT:
if (replay_state.read_event_id == -1) {
replay_state.read_event_id = replay_get_qword();
}

1
replay/replay-internal.h
View file

@ -51,6 +51,7 @@ enum ReplayEvents {
enum ReplayAsyncEventKind {
REPLAY_ASYNC_EVENT_BH,
REPLAY_ASYNC_EVENT_BH_ONESHOT,
REPLAY_ASYNC_EVENT_INPUT,
REPLAY_ASYNC_EVENT_INPUT_SYNC,
REPLAY_ASYNC_EVENT_CHAR_READ,

2
replay/replay.c
View file

@ -385,6 +385,8 @@ void replay_finish(void)
g_free(replay_snapshot);
replay_snapshot = NULL;
replay_mode = REPLAY_MODE_NONE;
replay_finish_events();
}

1
stubs/Makefile.objs
View file

@ -20,6 +20,7 @@ stub-obj-y += monitor.o
stub-obj-y += notify-event.o
stub-obj-y += qtest.o
stub-obj-y += replay.o
stub-obj-y += replay-user.o
stub-obj-y += runstate-check.o
stub-obj-y += set-fd-handler.o
stub-obj-y += sysbus.o

9
stubs/replay-user.c Normal file
View file

@ -0,0 +1,9 @@
#include "qemu/osdep.h"
#include "sysemu/replay.h"
#include "sysemu/sysemu.h"
void replay_bh_schedule_oneshot_event(AioContext *ctx,
QEMUBHFunc *cb, void *opaque)
{
aio_bh_schedule_oneshot(ctx, cb, opaque);
}

11
tests/qemu-iotests/028
View file

@ -119,9 +119,14 @@ fi
# Silence output since it contains the disk image path and QEMU's readline
# character echoing makes it very hard to filter the output. Plus, there
# is no telling how many times the command will repeat before succeeding.
_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)" >/dev/null
_send_qemu_cmd $h "" "Formatting" | _filter_img_create
qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs" >/dev/null
# (Note that creating the image results in a "Formatting..." message over
# stdout, which is the same channel the monitor uses. We cannot reliably
# wait for it because the monitor output may interact with it in such a
# way that _timed_wait_for cannot read it. However, once the block job is
# done, we know that the "Formatting..." message must have appeared
# already, so the output is still deterministic.)
silent=y _send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
silent=y qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
_send_qemu_cmd $h "info block-jobs" "No active jobs"
_send_qemu_cmd $h 'quit' ""

1
tests/qemu-iotests/028.out
View file

@ -468,7 +468,6 @@ No errors were found on the image.
block-backup
Formatting 'TEST_DIR/t.IMGFMT.copy', fmt=IMGFMT size=4294968832 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
(qemu) info block-jobs
No active jobs
=== IO: pattern 195

55
tests/qemu-iotests/268 Executable file
View file

@ -0,0 +1,55 @@
#!/usr/bin/env bash
#
# Test write request with required alignment larger than the cluster size
#
# Copyright (C) 2019 Igalia, S.L.
# Author: Alberto Garcia <berto@igalia.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# creator
owner=berto@igalia.com
seq=`basename $0`
echo "QA output created by $seq"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt qcow2
_supported_proto file
echo
echo "== Required alignment larger than cluster size =="
CLUSTER_SIZE=2k _make_test_img 1M
# Since commit c8bb23cbdb writing to an unallocated cluster fills the
# empty COW areas with bdrv_write_zeroes(flags=BDRV_REQ_NO_FALLBACK)
$QEMU_IO -c "open -o driver=$IMGFMT,file.align=4k blkdebug::$TEST_IMG" \
-c "write 0 512" | _filter_qemu_io
# success, all done
echo "*** done"
rm -f $seq.full
status=0

7
tests/qemu-iotests/268.out Normal file
View file

@ -0,0 +1,7 @@
QA output created by 268
== Required alignment larger than cluster size ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
*** done

83
tests/qemu-iotests/270 Executable file
View file

@ -0,0 +1,83 @@
#!/usr/bin/env bash
#
# Test large write to a qcow2 image
#
# Copyright (C) 2019 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
seq=$(basename "$0")
echo "QA output created by $seq"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# This is a qcow2 regression test
_supported_fmt qcow2
_supported_proto file
_supported_os Linux
# We use our own external data file and our own cluster size, and we
# require v3 images
_unsupported_imgopts data_file cluster_size 'compat=0.10'
# We need a backing file so that handle_alloc_space() will not do
# anything. (If it were to do anything, it would simply fail its
# write-zeroes request because the request range is too large.)
TEST_IMG="$TEST_IMG.base" _make_test_img 4G
$QEMU_IO -c 'write 0 512' "$TEST_IMG.base" | _filter_qemu_io
# (Use .orig because _cleanup_test_img will remove that file)
# We need a large cluster size, see below for why (above the $QEMU_IO
# invocation)
_make_test_img -o cluster_size=2M,data_file="$TEST_IMG.orig" \
-b "$TEST_IMG.base" 4G
# We want a null-co as the data file, because it allows us to quickly
# "write" 2G of data without using any space.
# (qemu-img create does not like it, though, because null-co does not
# support image creation.)
$QEMU_IMG amend -o data_file="json:{'driver':'null-co',,'size':'4294967296'}" \
"$TEST_IMG"
# This gives us a range of:
# 2^31 - 512 + 768 - 1 = 2^31 + 255 > 2^31
# until the beginning of the end COW block. (The total allocation
# size depends on the cluster size, but all that is important is that
# it exceeds INT_MAX.)
#
# 2^31 - 512 is the maximum request size. We want this to result in a
# single allocation, and because the qcow2 driver splits allocations
# on L2 boundaries, we need large L2 tables; hence the cluster size of
# 2 MB. (Anything from 256 kB should work, though, because then one L2
# table covers 8 GB.)
$QEMU_IO -c "write 768 $((2 ** 31 - 512))" "$TEST_IMG" | _filter_qemu_io
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0

9
tests/qemu-iotests/270.out Normal file
View file

@ -0,0 +1,9 @@
QA output created by 270
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=4294967296
wrote 512/512 bytes at offset 0
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4294967296 backing_file=TEST_DIR/t.IMGFMT.base data_file=TEST_DIR/t.IMGFMT.orig
wrote 2147483136/2147483136 bytes at offset 768
2 GiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
*** done

2
tests/qemu-iotests/group
View file

@ -278,3 +278,5 @@
265 rw auto quick
266 rw quick
267 rw auto quick snapshot
268 rw auto quick
270 rw backing quick

63
vl.c
View file

@ -1203,7 +1203,7 @@ static void configure_blockdev(BlockdevOptionsQueue *bdo_queue,
qapi_free_BlockdevOptions(bdo->bdo);
g_free(bdo);
}
if (snapshot || replay_mode != REPLAY_MODE_NONE) {
if (snapshot) {
qemu_opts_foreach(qemu_find_opts("drive"), drive_enable_snapshot,
NULL, NULL);
}
@ -2649,57 +2649,7 @@ static int machine_set_property(void *opaque,
*/
static bool object_create_initial(const char *type, QemuOpts *opts)
{
ObjectClass *klass;
if (is_help_option(type)) {
GSList *l, *list;
printf("List of user creatable objects:\n");
list = object_class_get_list_sorted(TYPE_USER_CREATABLE, false);
for (l = list; l != NULL; l = l->next) {
ObjectClass *oc = OBJECT_CLASS(l->data);
printf(" %s\n", object_class_get_name(oc));
}
g_slist_free(list);
exit(0);
}
klass = object_class_by_name(type);
if (klass && qemu_opt_has_help_opt(opts)) {
ObjectPropertyIterator iter;
ObjectProperty *prop;
GPtrArray *array = g_ptr_array_new();
int i;
object_class_property_iter_init(&iter, klass);
while ((prop = object_property_iter_next(&iter))) {
GString *str;
if (!prop->set) {
continue;
}
str = g_string_new(NULL);
g_string_append_printf(str, " %s=<%s>", prop->name, prop->type);
if (prop->description) {
if (str->len < 24) {
g_string_append_printf(str, "%*s", 24 - (int)str->len, "");
}
g_string_append_printf(str, " - %s", prop->description);
}
g_ptr_array_add(array, g_string_free(str, false));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
if (array->len > 0) {
printf("%s options:\n", type);
} else {
printf("There are no options for %s.\n", type);
}
for (i = 0; i < array->len; i++) {
printf("%s\n", (char *)array->pdata[i]);
}
g_ptr_array_set_free_func(array, g_free);
g_ptr_array_free(array, true);
if (user_creatable_print_help(type, opts)) {
exit(0);
}
@ -3066,7 +3016,13 @@ int main(int argc, char **argv, char **envp)
drive_add(IF_PFLASH, -1, optarg, PFLASH_OPTS);
break;
case QEMU_OPTION_snapshot:
snapshot = 1;
{
Error *blocker = NULL;
snapshot = 1;
error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED,
"-snapshot");
replay_add_blocker(blocker);
}
break;
case QEMU_OPTION_numa:
opts = qemu_opts_parse_noisily(qemu_find_opts("numa"),
@ -4518,6 +4474,7 @@ int main(int argc, char **argv, char **envp)
/* No more vcpu or device emulation activity beyond this point */
vm_shutdown();
replay_finish();
job_cancel_sync_all();
bdrv_close_all();