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

Browse Source 
Block layer patches

# gpg: Signature made Tue 06 Sep 2016 11:38:01 BST
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (36 commits)
  block: Allow node name for 'qemu-io' HMP command
  qemu-iotests: Log QMP traffic in debug mode
  block jobs: Improve error message for missing job ID
  coroutine: Assert that no locks are held on termination
  coroutine: Let CoMutex remember who holds it
  qcow2: fix iovec size at qcow2_co_pwritev_compressed
  test-coroutine: Fix coroutine pool corruption
  qemu-iotests: add vmdk for test backup compression in 055
  qemu-iotests: test backup compression in 055
  blockdev-backup: added support for data compression
  drive-backup: added support for data compression
  block: simplify blockdev-backup
  block: simplify drive-backup
  block/io: turn on dirty_bitmaps for the compressed writes
  block: remove BlockDriver.bdrv_write_compressed
  qcow: cleanup qcow_co_pwritev_compressed to avoid the recursion
  qcow: add qcow_co_pwritev_compressed
  vmdk: add vmdk_co_pwritev_compressed
  qcow2: cleanup qcow2_co_pwritev_compressed to avoid the recursion
  qcow2: add qcow2_co_pwritev_compressed
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
2016-09-06 17:18:17 +01:00
parent f9ae6bcf1d e7f98f2f92
commit 2926375cff
36 changed files with 589 additions and 618 deletions
Download Patch File Download Diff File Expand all files Collapse all files
block.c
+2
View File
@@ -25,6 +25,7 @@
#include "trace.h"
#include "block/block_int.h"
#include "block/blockjob.h"
#include "block/nbd.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "qapi/qmp/qerror.h"
@@ -2206,6 +2207,7 @@ static void bdrv_close(BlockDriverState *bs)
void bdrv_close_all(void)
{
block_job_cancel_sync_all();
nbd_export_close_all();
/* Drop references from requests still in flight, such as canceled block
* jobs whose AIO context has not been polled yet */
block/backup.c
+11 -1
View File
@@ -47,6 +47,7 @@ typedef struct BackupBlockJob {
uint64_t sectors_read;
unsigned long *done_bitmap;
int64_t cluster_size;
bool compress;
NotifierWithReturn before_write;
QLIST_HEAD(, CowRequest) inflight_reqs;
} BackupBlockJob;
@@ -154,7 +155,8 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
bounce_qiov.size, BDRV_REQ_MAY_UNMAP);
} else {
ret = blk_co_pwritev(job->target, start * job->cluster_size,
bounce_qiov.size, &bounce_qiov, 0);
bounce_qiov.size, &bounce_qiov,
job->compress ? BDRV_REQ_WRITE_COMPRESSED : 0);
}
if (ret < 0) {
trace_backup_do_cow_write_fail(job, start, ret);
@@ -477,6 +479,7 @@ static void coroutine_fn backup_run(void *opaque)
void backup_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *target, int64_t speed,
MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
bool compress,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
BlockCompletionFunc *cb, void *opaque,
@@ -507,6 +510,12 @@ void backup_start(const char *job_id, BlockDriverState *bs,
return;
}
if (compress && target->drv->bdrv_co_pwritev_compressed == NULL) {
error_setg(errp, "Compression is not supported for this drive %s",
bdrv_get_device_name(target));
return;
}
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
return;
}
@@ -555,6 +564,7 @@ void backup_start(const char *job_id, BlockDriverState *bs,
job->sync_mode = sync_mode;
job->sync_bitmap = sync_mode == MIRROR_SYNC_MODE_INCREMENTAL ?
sync_bitmap : NULL;
job->compress = compress;
/* If there is no backing file on the target, we cannot rely on COW if our
* backup cluster size is smaller than the target cluster size. Even for
block/block-backend.c
+20 -23
View File
@@ -409,6 +409,22 @@ bool bdrv_has_blk(BlockDriverState *bs)
return bdrv_first_blk(bs) != NULL;
}
/*
* Returns true if @bs has only BlockBackends as parents.
*/
bool bdrv_is_root_node(BlockDriverState *bs)
{
BdrvChild *c;
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c->role != &child_root) {
return false;
}
}
return true;
}
/*
* Return @blk's DriveInfo if any, else null.
*/
@@ -727,21 +743,6 @@ static int blk_check_byte_request(BlockBackend *blk, int64_t offset,
return 0;
}
static int blk_check_request(BlockBackend *blk, int64_t sector_num,
int nb_sectors)
{
if (sector_num < 0 || sector_num > INT64_MAX / BDRV_SECTOR_SIZE) {
return -EIO;
}
if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) {
return -EIO;
}
return blk_check_byte_request(blk, sector_num * BDRV_SECTOR_SIZE,
nb_sectors * BDRV_SECTOR_SIZE);
}
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
@@ -1484,15 +1485,11 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
flags | BDRV_REQ_ZERO_WRITE);
}
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int count)
{
int ret = blk_check_request(blk, sector_num, nb_sectors);
if (ret < 0) {
return ret;
}
return bdrv_write_compressed(blk_bs(blk), sector_num, buf, nb_sectors);
return blk_prw(blk, offset, (void *) buf, count, blk_write_entry,
BDRV_REQ_WRITE_COMPRESSED);
}
int blk_truncate(BlockBackend *blk, int64_t offset)
block/io.c
+15 -33
View File
@@ -540,17 +540,6 @@ static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset,
return 0;
}
static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
if (nb_sectors < 0 || nb_sectors > BDRV_REQUEST_MAX_SECTORS) {
return -EIO;
}
return bdrv_check_byte_request(bs, sector_num * BDRV_SECTOR_SIZE,
nb_sectors * BDRV_SECTOR_SIZE);
}
typedef struct RwCo {
BdrvChild *child;
int64_t offset;
@@ -897,6 +886,19 @@ emulate_flags:
return ret;
}
static int coroutine_fn
bdrv_driver_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
{
BlockDriver *drv = bs->drv;
if (!drv->bdrv_co_pwritev_compressed) {
return -ENOTSUP;
}
return drv->bdrv_co_pwritev_compressed(bs, offset, bytes, qiov);
}
static int coroutine_fn bdrv_co_do_copy_on_readv(BlockDriverState *bs,
int64_t offset, unsigned int bytes, QEMUIOVector *qiov)
{
@@ -1315,6 +1317,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
} else if (flags & BDRV_REQ_ZERO_WRITE) {
bdrv_debug_event(bs, BLKDBG_PWRITEV_ZERO);
ret = bdrv_co_do_pwrite_zeroes(bs, offset, bytes, flags);
} else if (flags & BDRV_REQ_WRITE_COMPRESSED) {
ret = bdrv_driver_pwritev_compressed(bs, offset, bytes, qiov);
} else if (bytes <= max_transfer) {
bdrv_debug_event(bs, BLKDBG_PWRITEV);
ret = bdrv_driver_pwritev(bs, offset, bytes, qiov, flags);
@@ -1879,28 +1883,6 @@ int bdrv_is_allocated_above(BlockDriverState *top,
return 0;
}
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
BlockDriver *drv = bs->drv;
int ret;
if (!drv) {
return -ENOMEDIUM;
}
if (!drv->bdrv_write_compressed) {
return -ENOTSUP;
}
ret = bdrv_check_request(bs, sector_num, nb_sectors);
if (ret < 0) {
return ret;
}
assert(QLIST_EMPTY(&bs->dirty_bitmaps));
return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
}
typedef struct BdrvVmstateCo {
BlockDriverState *bs;
QEMUIOVector *qiov;
block/qcow.c
+39 -74
View File
@@ -913,75 +913,32 @@ static int qcow_make_empty(BlockDriverState *bs)
return 0;
}
typedef struct QcowWriteCo {
BlockDriverState *bs;
int64_t sector_num;
const uint8_t *buf;
int nb_sectors;
int ret;
} QcowWriteCo;
static void qcow_write_co_entry(void *opaque)
{
QcowWriteCo *co = opaque;
QEMUIOVector qiov;
struct iovec iov = (struct iovec) {
.iov_base = (uint8_t*) co->buf,
.iov_len = co->nb_sectors * BDRV_SECTOR_SIZE,
};
qemu_iovec_init_external(&qiov, &iov, 1);
co->ret = qcow_co_writev(co->bs, co->sector_num, co->nb_sectors, &qiov);
}
/* Wrapper for non-coroutine contexts */
static int qcow_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
Coroutine *co;
AioContext *aio_context = bdrv_get_aio_context(bs);
QcowWriteCo data = {
.bs = bs,
.sector_num = sector_num,
.buf = buf,
.nb_sectors = nb_sectors,
.ret = -EINPROGRESS,
};
co = qemu_coroutine_create(qcow_write_co_entry, &data);
qemu_coroutine_enter(co);
while (data.ret == -EINPROGRESS) {
aio_poll(aio_context, true);
}
return data.ret;
}
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
static coroutine_fn int
qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
{
BDRVQcowState *s = bs->opaque;
QEMUIOVector hd_qiov;
struct iovec iov;
z_stream strm;
int ret, out_len;
uint8_t *out_buf;
uint8_t *buf, *out_buf;
uint64_t cluster_offset;
if (nb_sectors != s->cluster_sectors) {
ret = -EINVAL;
/* Zero-pad last write if image size is not cluster aligned */
if (sector_num + nb_sectors == bs->total_sectors &&
nb_sectors < s->cluster_sectors) {
uint8_t *pad_buf = qemu_blockalign(bs, s->cluster_size);
memset(pad_buf, 0, s->cluster_size);
memcpy(pad_buf, buf, nb_sectors * BDRV_SECTOR_SIZE);
ret = qcow_write_compressed(bs, sector_num,
pad_buf, s->cluster_sectors);
qemu_vfree(pad_buf);
buf = qemu_blockalign(bs, s->cluster_size);
if (bytes != s->cluster_size) {
if (bytes > s->cluster_size ||
offset + bytes != bs->total_sectors << BDRV_SECTOR_BITS)
{
qemu_vfree(buf);
return -EINVAL;
}
return ret;
/* Zero-pad last write if image size is not cluster aligned */
memset(buf + bytes, 0, s->cluster_size - bytes);
}
qemu_iovec_to_buf(qiov, 0, buf, qiov->size);
out_buf = g_malloc(s->cluster_size);
@@ -1012,27 +969,35 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
ret = qcow_write(bs, sector_num, buf, s->cluster_sectors);
if (ret < 0) {
goto fail;
}
} else {
cluster_offset = get_cluster_offset(bs, sector_num << 9, 2,
out_len, 0, 0);
if (cluster_offset == 0) {
ret = -EIO;
goto fail;
}
cluster_offset &= s->cluster_offset_mask;
ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len);
ret = qcow_co_writev(bs, offset >> BDRV_SECTOR_BITS,
bytes >> BDRV_SECTOR_BITS, qiov);
if (ret < 0) {
goto fail;
}
goto success;
}
qemu_co_mutex_lock(&s->lock);
cluster_offset = get_cluster_offset(bs, offset, 2, out_len, 0, 0);
qemu_co_mutex_unlock(&s->lock);
if (cluster_offset == 0) {
ret = -EIO;
goto fail;
}
cluster_offset &= s->cluster_offset_mask;
iov = (struct iovec) {
.iov_base = out_buf,
.iov_len = out_len,
};
qemu_iovec_init_external(&hd_qiov, &iov, 1);
ret = bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0);
if (ret < 0) {
goto fail;
}
success:
ret = 0;
fail:
qemu_vfree(buf);
g_free(out_buf);
return ret;
}
@@ -1085,7 +1050,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_set_key = qcow_set_key,
.bdrv_make_empty = qcow_make_empty,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_co_pwritev_compressed = qcow_co_pwritev_compressed,
.bdrv_get_info = qcow_get_info,
.create_opts = &qcow_create_opts,
block/qcow2.c
+49 -83
View File
@@ -2533,84 +2533,39 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset)
return 0;
}
typedef struct Qcow2WriteCo {
BlockDriverState *bs;
int64_t sector_num;
const uint8_t *buf;
int nb_sectors;
int ret;
} Qcow2WriteCo;
static void qcow2_write_co_entry(void *opaque)
{
Qcow2WriteCo *co = opaque;
QEMUIOVector qiov;
uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE;
uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE;
struct iovec iov = (struct iovec) {
.iov_base = (uint8_t*) co->buf,
.iov_len = bytes,
};
qemu_iovec_init_external(&qiov, &iov, 1);
co->ret = qcow2_co_pwritev(co->bs, offset, bytes, &qiov, 0);
}
/* Wrapper for non-coroutine contexts */
static int qcow2_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
Coroutine *co;
AioContext *aio_context = bdrv_get_aio_context(bs);
Qcow2WriteCo data = {
.bs = bs,
.sector_num = sector_num,
.buf = buf,
.nb_sectors = nb_sectors,
.ret = -EINPROGRESS,
};
co = qemu_coroutine_create(qcow2_write_co_entry, &data);
qemu_coroutine_enter(co);
while (data.ret == -EINPROGRESS) {
aio_poll(aio_context, true);
}
return data.ret;
}
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
static coroutine_fn int
qcow2_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
{
BDRVQcow2State *s = bs->opaque;
QEMUIOVector hd_qiov;
struct iovec iov;
z_stream strm;
int ret, out_len;
uint8_t *out_buf;
uint8_t *buf, *out_buf;
uint64_t cluster_offset;
if (nb_sectors == 0) {
if (bytes == 0) {
/* align end of file to a sector boundary to ease reading with
sector based I/Os */
cluster_offset = bdrv_getlength(bs->file->bs);
return bdrv_truncate(bs->file->bs, cluster_offset);
}
if (nb_sectors != s->cluster_sectors) {
ret = -EINVAL;
/* Zero-pad last write if image size is not cluster aligned */
if (sector_num + nb_sectors == bs->total_sectors &&
nb_sectors < s->cluster_sectors) {
uint8_t *pad_buf = qemu_blockalign(bs, s->cluster_size);
memset(pad_buf, 0, s->cluster_size);
memcpy(pad_buf, buf, nb_sectors * BDRV_SECTOR_SIZE);
ret = qcow2_write_compressed(bs, sector_num,
pad_buf, s->cluster_sectors);
qemu_vfree(pad_buf);
buf = qemu_blockalign(bs, s->cluster_size);
if (bytes != s->cluster_size) {
if (bytes > s->cluster_size ||
offset + bytes != bs->total_sectors << BDRV_SECTOR_BITS)
{
qemu_vfree(buf);
return -EINVAL;
}
return ret;
/* Zero-pad last write if image size is not cluster aligned */
memset(buf + bytes, 0, s->cluster_size - bytes);
}
qemu_iovec_to_buf(qiov, 0, buf, bytes);
out_buf = g_malloc(s->cluster_size);
@@ -2641,33 +2596,44 @@ static int qcow2_write_compressed(BlockDriverState *bs, int64_t sector_num,
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
ret = qcow2_write(bs, sector_num, buf, s->cluster_sectors);
if (ret < 0) {
goto fail;
}
} else {
cluster_offset = qcow2_alloc_compressed_cluster_offset(bs,
sector_num << 9, out_len);
if (!cluster_offset) {
ret = -EIO;
goto fail;
}
cluster_offset &= s->cluster_offset_mask;
ret = qcow2_pre_write_overlap_check(bs, 0, cluster_offset, out_len);
if (ret < 0) {
goto fail;
}
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED);
ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len);
ret = qcow2_co_pwritev(bs, offset, bytes, qiov, 0);
if (ret < 0) {
goto fail;
}
goto success;
}
qemu_co_mutex_lock(&s->lock);
cluster_offset =
qcow2_alloc_compressed_cluster_offset(bs, offset, out_len);
if (!cluster_offset) {
qemu_co_mutex_unlock(&s->lock);
ret = -EIO;
goto fail;
}
cluster_offset &= s->cluster_offset_mask;
ret = qcow2_pre_write_overlap_check(bs, 0, cluster_offset, out_len);
qemu_co_mutex_unlock(&s->lock);
if (ret < 0) {
goto fail;
}
iov = (struct iovec) {
.iov_base = out_buf,
.iov_len = out_len,
};
qemu_iovec_init_external(&hd_qiov, &iov, 1);
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_COMPRESSED);
ret = bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0);
if (ret < 0) {
goto fail;
}
success:
ret = 0;
fail:
qemu_vfree(buf);
g_free(out_buf);
return ret;
}
@@ -3412,7 +3378,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_co_pwrite_zeroes = qcow2_co_pwrite_zeroes,
.bdrv_co_pdiscard = qcow2_co_pdiscard,
.bdrv_truncate = qcow2_truncate,
.bdrv_write_compressed = qcow2_write_compressed,
.bdrv_co_pwritev_compressed = qcow2_co_pwritev_compressed,
.bdrv_make_empty = qcow2_make_empty,
.bdrv_snapshot_create = qcow2_snapshot_create,
block/vmdk.c
+5 -50
View File
@@ -1645,56 +1645,11 @@ vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
return ret;
}
typedef struct VmdkWriteCompressedCo {
BlockDriverState *bs;
int64_t sector_num;
const uint8_t *buf;
int nb_sectors;
int ret;
} VmdkWriteCompressedCo;
static void vmdk_co_write_compressed(void *opaque)
static int coroutine_fn
vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
{
VmdkWriteCompressedCo *co = opaque;
QEMUIOVector local_qiov;
uint64_t offset = co->sector_num * BDRV_SECTOR_SIZE;
uint64_t bytes = co->nb_sectors * BDRV_SECTOR_SIZE;
struct iovec iov = (struct iovec) {
.iov_base = (uint8_t*) co->buf,
.iov_len = bytes,
};
qemu_iovec_init_external(&local_qiov, &iov, 1);
co->ret = vmdk_pwritev(co->bs, offset, bytes, &local_qiov, false, false);
}
static int vmdk_write_compressed(BlockDriverState *bs,
int64_t sector_num,
const uint8_t *buf,
int nb_sectors)
{
BDRVVmdkState *s = bs->opaque;
if (s->num_extents == 1 && s->extents[0].compressed) {
Coroutine *co;
AioContext *aio_context = bdrv_get_aio_context(bs);
VmdkWriteCompressedCo data = {
.bs = bs,
.sector_num = sector_num,
.buf = buf,
.nb_sectors = nb_sectors,
.ret = -EINPROGRESS,
};
co = qemu_coroutine_create(vmdk_co_write_compressed, &data);
qemu_coroutine_enter(co);
while (data.ret == -EINPROGRESS) {
aio_poll(aio_context, true);
}
return data.ret;
} else {
return -ENOTSUP;
}
return vmdk_co_pwritev(bs, offset, bytes, qiov, 0);
}
static int coroutine_fn vmdk_co_pwrite_zeroes(BlockDriverState *bs,
@@ -2393,7 +2348,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_co_preadv = vmdk_co_preadv,
.bdrv_co_pwritev = vmdk_co_pwritev,
.bdrv_write_compressed = vmdk_write_compressed,
.bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed,
.bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
blockdev-nbd.c
+9 -12
View File
@@ -145,7 +145,8 @@ void qmp_nbd_server_start(SocketAddress *addr,
void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
Error **errp)
{
BlockBackend *blk;
BlockDriverState *bs = NULL;
BlockBackend *on_eject_blk;
NBDExport *exp;
if (!nbd_server) {
@@ -158,26 +159,22 @@ void qmp_nbd_server_add(const char *device, bool has_writable, bool writable,
return;
}
blk = blk_by_name(device);
if (!blk) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", device);
return;
}
if (!blk_is_inserted(blk)) {
error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
on_eject_blk = blk_by_name(device);
bs = bdrv_lookup_bs(device, device, errp);
if (!bs) {
return;
}
if (!has_writable) {
writable = false;
}
if (blk_is_read_only(blk)) {
if (bdrv_is_read_only(bs)) {
writable = false;
}
exp = nbd_export_new(blk, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY, NULL,
errp);
exp = nbd_export_new(bs, 0, -1, writable ? 0 : NBD_FLAG_READ_ONLY,
NULL, false, on_eject_blk, errp);
if (!exp) {
return;
}
blockdev.c
+127 -251
View File
File diff suppressed because it is too large Load Diff
blockjob.c
+4
View File
@@ -132,6 +132,10 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
if (job_id == NULL) {
job_id = bdrv_get_device_name(bs);
if (!*job_id) {
error_setg(errp, "An explicit job ID is required for this node");
return NULL;
}
}
if (!id_wellformed(job_id)) {
hmp-commands.hx
+5 -3
View File
@@ -1182,8 +1182,8 @@ ETEXI
{
.name = "drive_backup",
.args_type = "reuse:-n,full:-f,device:B,target:s,format:s?",
.params = "[-n] [-f] device target [format]",
.args_type = "reuse:-n,full:-f,compress:-c,device:B,target:s,format:s?",
.params = "[-n] [-f] [-c] device target [format]",
.help = "initiates a point-in-time\n\t\t\t"
"copy for a device. The device's contents are\n\t\t\t"
"copied to the new image file, excluding data that\n\t\t\t"
@@ -1191,7 +1191,9 @@ ETEXI
"The -n flag requests QEMU to reuse the image found\n\t\t\t"
"in new-image-file, instead of recreating it from scratch.\n\t\t\t"
"The -f flag requests QEMU to copy the whole disk,\n\t\t\t"
"so that the result does not need a backing file.\n\t\t\t",
"so that the result does not need a backing file.\n\t\t\t"
"The -c flag requests QEMU to compress backup data\n\t\t\t"
"(if the target format supports it).\n\t\t\t",
.mhandler.cmd = hmp_drive_backup,
},
STEXI
hmp.c
+26 -11
View File
@@ -1109,8 +1109,19 @@ void hmp_drive_backup(Monitor *mon, const QDict *qdict)
const char *format = qdict_get_try_str(qdict, "format");
bool reuse = qdict_get_try_bool(qdict, "reuse", false);
bool full = qdict_get_try_bool(qdict, "full", false);
enum NewImageMode mode;
bool compress = qdict_get_try_bool(qdict, "compress", false);
Error *err = NULL;
DriveBackup backup = {
.device = (char *)device,
.target = (char *)filename,
.has_format = !!format,
.format = (char *)format,
.sync = full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
.has_mode = true,
.mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS,
.has_compress = !!compress,
.compress = compress,
};
if (!filename) {
error_setg(&err, QERR_MISSING_PARAMETER, "target");
@@ -1118,16 +1129,7 @@ void hmp_drive_backup(Monitor *mon, const QDict *qdict)
return;
}
if (reuse) {
mode = NEW_IMAGE_MODE_EXISTING;
} else {
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
qmp_drive_backup(false, NULL, device, filename, !!format, format,
full ? MIRROR_SYNC_MODE_FULL : MIRROR_SYNC_MODE_TOP,
true, mode, false, 0, false, NULL,
false, 0, false, 0, &err);
qmp_drive_backup(&backup, &err);
hmp_handle_error(mon, &err);
}
@@ -1921,11 +1923,22 @@ void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
void hmp_qemu_io(Monitor *mon, const QDict *qdict)
{
BlockBackend *blk;
BlockBackend *local_blk = NULL;
const char* device = qdict_get_str(qdict, "device");
const char* command = qdict_get_str(qdict, "command");
Error *err = NULL;
blk = blk_by_name(device);
if (!blk) {
BlockDriverState *bs = bdrv_lookup_bs(NULL, device, &err);
if (bs) {
blk = local_blk = blk_new();
blk_insert_bs(blk, bs);
} else {
goto fail;
}
}
if (blk) {
AioContext *aio_context = blk_get_aio_context(blk);
aio_context_acquire(aio_context);
@@ -1938,6 +1951,8 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
"Device '%s' not found", device);
}
fail:
blk_unref(local_blk);
hmp_handle_error(mon, &err);
}
hw/ide/qdev.c
+15 -5
View File
@@ -75,10 +75,6 @@ static int ide_qdev_init(DeviceState *qdev)
IDEDeviceClass *dc = IDE_DEVICE_GET_CLASS(dev);
IDEBus *bus = DO_UPCAST(IDEBus, qbus, qdev->parent_bus);
if (!dev->conf.blk) {
error_report("No drive specified");
goto err;
}
if (dev->unit == -1) {
dev->unit = bus->master ? 1 : 0;
}
@@ -158,6 +154,16 @@ static int ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind)
IDEState *s = bus->ifs + dev->unit;
Error *err = NULL;
if (!dev->conf.blk) {
if (kind != IDE_CD) {
error_report("No drive specified");
return -1;
} else {
/* Anonymous BlockBackend for an empty drive */
dev->conf.blk = blk_new();
}
}
if (dev->conf.discard_granularity == -1) {
dev->conf.discard_granularity = 512;
} else if (dev->conf.discard_granularity &&
@@ -257,7 +263,11 @@ static int ide_cd_initfn(IDEDevice *dev)
static int ide_drive_initfn(IDEDevice *dev)
{
DriveInfo *dinfo = blk_legacy_dinfo(dev->conf.blk);
DriveInfo *dinfo = NULL;
if (dev->conf.blk) {
dinfo = blk_legacy_dinfo(dev->conf.blk);
}
return ide_dev_initfn(dev, dinfo && dinfo->media_cd ? IDE_CD : IDE_HD);
}
hw/scsi/scsi-disk.c
+5
View File
@@ -2359,6 +2359,11 @@ static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
if (!dev->conf.blk) {
dev->conf.blk = blk_new();
}
s->qdev.blocksize = 2048;
s->qdev.type = TYPE_ROM;
s->features |= 1 << SCSI_DISK_F_REMOVABLE;
include/block/block.h
+2 -3
View File
@@ -65,9 +65,10 @@ typedef enum {
BDRV_REQ_MAY_UNMAP = 0x4,
BDRV_REQ_NO_SERIALISING = 0x8,
BDRV_REQ_FUA = 0x10,
BDRV_REQ_WRITE_COMPRESSED = 0x20,
/* Mask of valid flags */
BDRV_REQ_MASK = 0x1f,
BDRV_REQ_MASK = 0x3f,
} BdrvRequestFlags;
typedef struct BlockSizes {
@@ -399,8 +400,6 @@ const char *bdrv_get_node_name(const BlockDriverState *bs);
const char *bdrv_get_device_name(const BlockDriverState *bs);
const char *bdrv_get_device_or_node_name(const BlockDriverState *bs);
int bdrv_get_flags(BlockDriverState *bs);
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
void bdrv_round_sectors_to_clusters(BlockDriverState *bs,
include/block/block_int.h
+3 -2
View File
@@ -204,8 +204,8 @@ struct BlockDriver {
bool has_variable_length;
int64_t (*bdrv_get_allocated_file_size)(BlockDriverState *bs);
int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int coroutine_fn (*bdrv_co_pwritev_compressed)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov);
int (*bdrv_snapshot_create)(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);
@@ -765,6 +765,7 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
void backup_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *target, int64_t speed,
MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
bool compress,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
BlockCompletionFunc *cb, void *opaque,
include/block/nbd.h
+2 -1
View File
@@ -103,8 +103,9 @@ int nbd_disconnect(int fd);
typedef struct NBDExport NBDExport;
typedef struct NBDClient NBDClient;
NBDExport *nbd_export_new(BlockBackend *blk, off_t dev_offset, off_t size,
NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset, off_t size,
uint16_t nbdflags, void (*close)(NBDExport *),
bool writethrough, BlockBackend *on_eject_blk,
Error **errp);
void nbd_export_close(NBDExport *exp);
void nbd_export_get(NBDExport *exp);
include/qemu/coroutine.h
+1
View File
@@ -143,6 +143,7 @@ bool qemu_co_queue_empty(CoQueue *queue);
*/
typedef struct CoMutex {
bool locked;
Coroutine *holder;
CoQueue queue;
} CoMutex;
include/qemu/coroutine_int.h
+1
View File
@@ -39,6 +39,7 @@ struct Coroutine {
void *entry_arg;
Coroutine *caller;
QSLIST_ENTRY(Coroutine) pool_next;
size_t locks_held;
/* Coroutines that should be woken up when we yield or terminate */
QSIMPLEQ_HEAD(, Coroutine) co_queue_wakeup;
include/sysemu/block-backend.h
+3 -2
View File
@@ -98,6 +98,7 @@ BlockDriverState *blk_bs(BlockBackend *blk);
void blk_remove_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
bool bdrv_has_blk(BlockDriverState *bs);
bool bdrv_is_root_node(BlockDriverState *bs);
void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
void blk_iostatus_enable(BlockBackend *blk);
@@ -203,8 +204,8 @@ void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int count);
int blk_truncate(BlockBackend *blk, int64_t offset);
int blk_pdiscard(BlockBackend *blk, int64_t offset, int count);
int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,

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