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Merge remote-tracking branch 'stefanha/block' into staging

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# By Paolo Bonzini (17) and others
# Via Stefan Hajnoczi
* stefanha/block: (48 commits)
  qemu-iotests: filter QEMU monitor \r\n
  aio: make aio_poll(ctx, true) block with no fds
  block: clean up bdrv_drain_all() throttling comments
  qcow2: use start_of_cluster() and offset_into_cluster() everywhere
  qemu-img: decrease progress update interval on convert
  qemu-img: round down request length to an aligned sector
  qemu-img: dynamically adjust iobuffer size during convert
  block/iscsi: set bs->bl.opt_transfer_length
  block: add opt_transfer_length to BlockLimits
  block/iscsi: set bdi->cluster_size
  qemu-img: fix usage instruction for qemu-img convert
  qemu-img: add support for skipping zeroes in input during convert
  qemu-nbd: add doc for option -f
  qemu-iotests: add test for snapshot in qemu-img convert
  qemu-img: add -l for snapshot in convert
  qemu-iotests: add 058 internal snapshot export with qemu-nbd case
  qemu-nbd: support internal snapshot export
  snapshot: distinguish id and name in load_tmp
  qemu-iotests: Split qcow2 only cases in 048
  qemu-iotests: Clean up spaces in usage output
  ...

Message-id: 1386347807-27359-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
This commit is contained in:
Anthony Liguori
2013-12-07 07:35:31 -08:00
parent 0c0cb6a237 ac9524dc55
commit 93531372f0
48 changed files with 3246 additions and 396 deletions
Download Patch File Download Diff File Expand all files Collapse all files
aio-posix.c
-5
View File
@@ -217,11 +217,6 @@ bool aio_poll(AioContext *ctx, bool blocking)
ctx->walking_handlers--;
/* early return if we only have the aio_notify() fd */
if (ctx->pollfds->len == 1) {
return progress;
}
/* wait until next event */
ret = qemu_poll_ns((GPollFD *)ctx->pollfds->data,
ctx->pollfds->len,
aio-win32.c
-5
View File
@@ -161,11 +161,6 @@ bool aio_poll(AioContext *ctx, bool blocking)
ctx->walking_handlers--;
/* early return if we only have the aio_notify() fd */
if (count == 1) {
return progress;
}
/* wait until next event */
while (count > 0) {
int ret;
block.c
+100 -76
View File
@@ -79,6 +79,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
int64_t sector_num,
QEMUIOVector *qiov,
int nb_sectors,
BdrvRequestFlags flags,
BlockDriverCompletionFunc *cb,
void *opaque,
bool is_write);
@@ -1556,13 +1557,8 @@ void bdrv_drain_all(void)
BlockDriverState *bs;
while (busy) {
/* FIXME: We do not have timer support here, so this is effectively
* a busy wait.
*/
QTAILQ_FOREACH(bs, &bdrv_states, list) {
if (bdrv_start_throttled_reqs(bs)) {
busy = true;
}
bdrv_start_throttled_reqs(bs);
}
busy = bdrv_requests_pending_all();
@@ -2770,14 +2766,21 @@ static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
while (nb_sectors > 0 && !ret) {
int num = nb_sectors;
/* align request */
if (bs->bl.write_zeroes_alignment &&
num >= bs->bl.write_zeroes_alignment &&
sector_num % bs->bl.write_zeroes_alignment) {
if (num > bs->bl.write_zeroes_alignment) {
/* Align request. Block drivers can expect the "bulk" of the request
* to be aligned.
*/
if (bs->bl.write_zeroes_alignment
&& num > bs->bl.write_zeroes_alignment) {
if (sector_num % bs->bl.write_zeroes_alignment != 0) {
/* Make a small request up to the first aligned sector. */
num = bs->bl.write_zeroes_alignment;
num -= sector_num % bs->bl.write_zeroes_alignment;
} else if ((sector_num + num) % bs->bl.write_zeroes_alignment != 0) {
/* Shorten the request to the last aligned sector. num cannot
* underflow because num > bs->bl.write_zeroes_alignment.
*/
num -= (sector_num + num) % bs->bl.write_zeroes_alignment;
}
num -= sector_num % bs->bl.write_zeroes_alignment;
}
/* limit request size */
@@ -2795,16 +2798,20 @@ static int coroutine_fn bdrv_co_do_write_zeroes(BlockDriverState *bs,
/* Fall back to bounce buffer if write zeroes is unsupported */
iov.iov_len = num * BDRV_SECTOR_SIZE;
if (iov.iov_base == NULL) {
/* allocate bounce buffer only once and ensure that it
* is big enough for this and all future requests.
*/
size_t bufsize = num <= nb_sectors ? num : max_write_zeroes;
iov.iov_base = qemu_blockalign(bs, bufsize * BDRV_SECTOR_SIZE);
memset(iov.iov_base, 0, bufsize * BDRV_SECTOR_SIZE);
iov.iov_base = qemu_blockalign(bs, num * BDRV_SECTOR_SIZE);
memset(iov.iov_base, 0, num * BDRV_SECTOR_SIZE);
}
qemu_iovec_init_external(&qiov, &iov, 1);
ret = drv->bdrv_co_writev(bs, sector_num, num, &qiov);
/* Keep bounce buffer around if it is big enough for all
* all future requests.
*/
if (num < max_write_zeroes) {
qemu_vfree(iov.iov_base);
iov.iov_base = NULL;
}
}
sector_num += num;
@@ -2887,7 +2894,7 @@ int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
BdrvRequestFlags flags)
{
trace_bdrv_co_write_zeroes(bs, sector_num, nb_sectors);
trace_bdrv_co_write_zeroes(bs, sector_num, nb_sectors, flags);
if (!(bs->open_flags & BDRV_O_UNMAP)) {
flags &= ~BDRV_REQ_MAY_UNMAP;
@@ -3669,7 +3676,7 @@ BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
{
trace_bdrv_aio_readv(bs, sector_num, nb_sectors, opaque);
return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors,
return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, 0,
cb, opaque, false);
}
@@ -3679,7 +3686,18 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
{
trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque);
return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors,
return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors, 0,
cb, opaque, true);
}
BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, BdrvRequestFlags flags,
BlockDriverCompletionFunc *cb, void *opaque)
{
trace_bdrv_aio_write_zeroes(bs, sector_num, nb_sectors, flags, opaque);
return bdrv_co_aio_rw_vector(bs, sector_num, NULL, nb_sectors,
BDRV_REQ_ZERO_WRITE | flags,
cb, opaque, true);
}
@@ -3851,8 +3869,10 @@ int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs)
/* Run the aio requests. */
mcb->num_requests = num_reqs;
for (i = 0; i < num_reqs; i++) {
bdrv_aio_writev(bs, reqs[i].sector, reqs[i].qiov,
reqs[i].nb_sectors, multiwrite_cb, mcb);
bdrv_co_aio_rw_vector(bs, reqs[i].sector, reqs[i].qiov,
reqs[i].nb_sectors, reqs[i].flags,
multiwrite_cb, mcb,
true);
}
return 0;
@@ -3994,10 +4014,10 @@ static void coroutine_fn bdrv_co_do_rw(void *opaque)
if (!acb->is_write) {
acb->req.error = bdrv_co_do_readv(bs, acb->req.sector,
acb->req.nb_sectors, acb->req.qiov, 0);
acb->req.nb_sectors, acb->req.qiov, acb->req.flags);
} else {
acb->req.error = bdrv_co_do_writev(bs, acb->req.sector,
acb->req.nb_sectors, acb->req.qiov, 0);
acb->req.nb_sectors, acb->req.qiov, acb->req.flags);
}
acb->bh = qemu_bh_new(bdrv_co_em_bh, acb);
@@ -4008,6 +4028,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
int64_t sector_num,
QEMUIOVector *qiov,
int nb_sectors,
BdrvRequestFlags flags,
BlockDriverCompletionFunc *cb,
void *opaque,
bool is_write)
@@ -4019,6 +4040,7 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
acb->req.sector = sector_num;
acb->req.nb_sectors = nb_sectors;
acb->req.qiov = qiov;
acb->req.flags = flags;
acb->is_write = is_write;
acb->done = NULL;
@@ -4302,6 +4324,8 @@ static void coroutine_fn bdrv_discard_co_entry(void *opaque)
int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
int max_discard;
if (!bs->drv) {
return -ENOMEDIUM;
} else if (bdrv_check_request(bs, sector_num, nb_sectors)) {
@@ -4317,55 +4341,55 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
return 0;
}
if (bs->drv->bdrv_co_discard) {
int max_discard = bs->bl.max_discard ?
bs->bl.max_discard : MAX_DISCARD_DEFAULT;
while (nb_sectors > 0) {
int ret;
int num = nb_sectors;
/* align request */
if (bs->bl.discard_alignment &&
num >= bs->bl.discard_alignment &&
sector_num % bs->bl.discard_alignment) {
if (num > bs->bl.discard_alignment) {
num = bs->bl.discard_alignment;
}
num -= sector_num % bs->bl.discard_alignment;
}
/* limit request size */
if (num > max_discard) {
num = max_discard;
}
ret = bs->drv->bdrv_co_discard(bs, sector_num, num);
if (ret) {
return ret;
}
sector_num += num;
nb_sectors -= num;
}
return 0;
} else if (bs->drv->bdrv_aio_discard) {
BlockDriverAIOCB *acb;
CoroutineIOCompletion co = {
.coroutine = qemu_coroutine_self(),
};
acb = bs->drv->bdrv_aio_discard(bs, sector_num, nb_sectors,
bdrv_co_io_em_complete, &co);
if (acb == NULL) {
return -EIO;
} else {
qemu_coroutine_yield();
return co.ret;
}
} else {
if (!bs->drv->bdrv_co_discard && !bs->drv->bdrv_aio_discard) {
return 0;
}
max_discard = bs->bl.max_discard ? bs->bl.max_discard : MAX_DISCARD_DEFAULT;
while (nb_sectors > 0) {
int ret;
int num = nb_sectors;
/* align request */
if (bs->bl.discard_alignment &&
num >= bs->bl.discard_alignment &&
sector_num % bs->bl.discard_alignment) {
if (num > bs->bl.discard_alignment) {
num = bs->bl.discard_alignment;
}
num -= sector_num % bs->bl.discard_alignment;
}
/* limit request size */
if (num > max_discard) {
num = max_discard;
}
if (bs->drv->bdrv_co_discard) {
ret = bs->drv->bdrv_co_discard(bs, sector_num, num);
} else {
BlockDriverAIOCB *acb;
CoroutineIOCompletion co = {
.coroutine = qemu_coroutine_self(),
};
acb = bs->drv->bdrv_aio_discard(bs, sector_num, nb_sectors,
bdrv_co_io_em_complete, &co);
if (acb == NULL) {
return -EIO;
} else {
qemu_coroutine_yield();
ret = co.ret;
}
}
if (ret && ret != -ENOTSUP) {
return ret;
}
sector_num += num;
nb_sectors -= num;
}
return 0;
}
int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors)
@@ -4684,7 +4708,6 @@ void bdrv_img_create(const char *filename, const char *fmt,
{
QEMUOptionParameter *param = NULL, *create_options = NULL;
QEMUOptionParameter *backing_fmt, *backing_file, *size;
BlockDriverState *bs = NULL;
BlockDriver *drv, *proto_drv;
BlockDriver *backing_drv = NULL;
Error *local_err = NULL;
@@ -4763,6 +4786,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
size = get_option_parameter(param, BLOCK_OPT_SIZE);
if (size && size->value.n == -1) {
if (backing_file && backing_file->value.s) {
BlockDriverState *bs;
uint64_t size;
char buf[32];
int back_flags;
@@ -4781,6 +4805,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
error_get_pretty(local_err));
error_free(local_err);
local_err = NULL;
bdrv_unref(bs);
goto out;
}
bdrv_get_geometry(bs, &size);
@@ -4788,6 +4813,8 @@ void bdrv_img_create(const char *filename, const char *fmt,
snprintf(buf, sizeof(buf), "%" PRId64, size);
set_option_parameter(param, BLOCK_OPT_SIZE, buf);
bdrv_unref(bs);
} else {
error_setg(errp, "Image creation needs a size parameter");
goto out;
@@ -4818,9 +4845,6 @@ out:
free_option_parameters(create_options);
free_option_parameters(param);
if (bs) {
bdrv_unref(bs);
}
if (error_is_set(&local_err)) {
error_propagate(errp, local_err);
}
block/iscsi.c
+28 -9
View File
@@ -2,6 +2,7 @@
* QEMU Block driver for iSCSI images
*
* Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
* Copyright (c) 2012-2013 Peter Lieven <pl@kamp.de>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -54,6 +55,7 @@ typedef struct IscsiLun {
QEMUTimer *nop_timer;
uint8_t lbpme;
uint8_t lbprz;
uint8_t has_write_same;
struct scsi_inquiry_logical_block_provisioning lbp;
struct scsi_inquiry_block_limits bl;
unsigned char *zeroblock;
@@ -975,8 +977,13 @@ coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
return -EINVAL;
}
if (!iscsilun->lbp.lbpws) {
/* WRITE SAME is not supported by the target */
if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) {
/* WRITE SAME without UNMAP is not supported by the target */
return -ENOTSUP;
}
if ((flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->lbp.lbpws) {
/* WRITE SAME with UNMAP is not supported by the target */
return -ENOTSUP;
}
@@ -1011,6 +1018,14 @@ retry:
}
if (iTask.status != SCSI_STATUS_GOOD) {
if (iTask.status == SCSI_STATUS_CHECK_CONDITION &&
iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST &&
iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) {
/* WRITE SAME is not supported by the target */
iscsilun->has_write_same = false;
return -ENOTSUP;
}
return -EIO;
}
@@ -1374,6 +1389,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
}
iscsilun->type = inq->periperal_device_type;
iscsilun->has_write_same = true;
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) {
goto out;
@@ -1441,6 +1457,9 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
}
bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran,
iscsilun);
bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len,
iscsilun);
}
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
@@ -1505,11 +1524,6 @@ static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
return 0;
}
static int iscsi_has_zero_init(BlockDriverState *bs)
{
return 0;
}
static int iscsi_create(const char *filename, QEMUOptionParameter *options,
Error **errp)
{
@@ -1569,6 +1583,13 @@ static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
IscsiLun *iscsilun = bs->opaque;
bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz;
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws;
/* Guess the internal cluster (page) size of the iscsi target by the means
* of opt_unmap_gran. Transfer the unmap granularity only if it has a
* reasonable size for bdi->cluster_size */
if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 &&
iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) {
bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
}
return 0;
}
@@ -1608,8 +1629,6 @@ static BlockDriver bdrv_iscsi = {
.bdrv_aio_writev = iscsi_aio_writev,
.bdrv_aio_flush = iscsi_aio_flush,
.bdrv_has_zero_init = iscsi_has_zero_init,
#ifdef __linux__
.bdrv_ioctl = iscsi_ioctl,
.bdrv_aio_ioctl = iscsi_aio_ioctl,
block/qcow2-cluster.c
+1 -1
View File
@@ -1401,7 +1401,7 @@ int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
/* Round start up and end down */
offset = align_offset(offset, s->cluster_size);
end_offset &= ~(s->cluster_size - 1);
end_offset = start_of_cluster(s, end_offset);
if (offset > end_offset) {
return 0;
block/qcow2-refcount.c
+11 -11
View File
@@ -515,8 +515,8 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
s->l2_table_cache);
}
start = offset & ~(s->cluster_size - 1);
last = (offset + length - 1) & ~(s->cluster_size - 1);
start = start_of_cluster(s, offset);
last = start_of_cluster(s, offset + length - 1);
for(cluster_offset = start; cluster_offset <= last;
cluster_offset += s->cluster_size)
{
@@ -724,7 +724,7 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
}
redo:
free_in_cluster = s->cluster_size -
(s->free_byte_offset & (s->cluster_size - 1));
offset_into_cluster(s, s->free_byte_offset);
if (size <= free_in_cluster) {
/* enough space in current cluster */
offset = s->free_byte_offset;
@@ -732,7 +732,7 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
free_in_cluster -= size;
if (free_in_cluster == 0)
s->free_byte_offset = 0;
if ((offset & (s->cluster_size - 1)) != 0)
if (offset_into_cluster(s, offset) != 0)
qcow2_update_cluster_refcount(bs, offset >> s->cluster_bits, 1,
QCOW2_DISCARD_NEVER);
} else {
@@ -740,7 +740,7 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
if (offset < 0) {
return offset;
}
cluster_offset = s->free_byte_offset & ~(s->cluster_size - 1);
cluster_offset = start_of_cluster(s, s->free_byte_offset);
if ((cluster_offset + s->cluster_size) == offset) {
/* we are lucky: contiguous data */
offset = s->free_byte_offset;
@@ -1010,8 +1010,8 @@ static void inc_refcounts(BlockDriverState *bs,
if (size <= 0)
return;
start = offset & ~(s->cluster_size - 1);
last = (offset + size - 1) & ~(s->cluster_size - 1);
start = start_of_cluster(s, offset);
last = start_of_cluster(s, offset + size - 1);
for(cluster_offset = start; cluster_offset <= last;
cluster_offset += s->cluster_size) {
k = cluster_offset >> s->cluster_bits;
@@ -1122,7 +1122,7 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res,
offset, s->cluster_size);
/* Correct offsets are cluster aligned */
if (offset & (s->cluster_size - 1)) {
if (offset_into_cluster(s, offset)) {
fprintf(stderr, "ERROR offset=%" PRIx64 ": Cluster is not "
"properly aligned; L2 entry corrupted.\n", offset);
res->corruptions++;
@@ -1194,7 +1194,7 @@ static int check_refcounts_l1(BlockDriverState *bs,
l2_offset, s->cluster_size);
/* L2 tables are cluster aligned */
if (l2_offset & (s->cluster_size - 1)) {
if (offset_into_cluster(s, l2_offset)) {
fprintf(stderr, "ERROR l2_offset=%" PRIx64 ": Table is not "
"cluster aligned; L1 entry corrupted\n", l2_offset);
res->corruptions++;
@@ -1423,7 +1423,7 @@ static int64_t realloc_refcount_block(BlockDriverState *bs, int reftable_index,
}
/* update refcount table */
assert(!(new_offset & (s->cluster_size - 1)));
assert(!offset_into_cluster(s, new_offset));
s->refcount_table[reftable_index] = new_offset;
ret = write_reftable_entry(bs, reftable_index);
if (ret < 0) {
@@ -1507,7 +1507,7 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
cluster = offset >> s->cluster_bits;
/* Refcount blocks are cluster aligned */
if (offset & (s->cluster_size - 1)) {
if (offset_into_cluster(s, offset)) {
fprintf(stderr, "ERROR refcount block %" PRId64 " is not "
"cluster aligned; refcount table entry corrupted\n", i);
res->corruptions++;
block/qcow2-snapshot.c
+8 -2
View File
@@ -675,7 +675,10 @@ int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
return s->nb_snapshots;
}
int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name)
int qcow2_snapshot_load_tmp(BlockDriverState *bs,
const char *snapshot_id,
const char *name,
Error **errp)
{
int i, snapshot_index;
BDRVQcowState *s = bs->opaque;
@@ -687,8 +690,10 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name)
assert(bs->read_only);
/* Search the snapshot */
snapshot_index = find_snapshot_by_id_or_name(bs, snapshot_name);
snapshot_index = find_snapshot_by_id_and_name(bs, snapshot_id, name);
if (snapshot_index < 0) {
error_setg(errp,
"Can't find snapshot");
return -ENOENT;
}
sn = &s->snapshots[snapshot_index];
@@ -699,6 +704,7 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name)
ret = bdrv_pread(bs->file, sn->l1_table_offset, new_l1_table, new_l1_bytes);
if (ret < 0) {
error_setg(errp, "Failed to read l1 table for snapshot");
g_free(new_l1_table);
return ret;
}
block/qcow2.c
+23 -16
View File
@@ -718,6 +718,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
qemu_opts_del(opts);
bs->bl.write_zeroes_alignment = s->cluster_sectors;
if (s->use_lazy_refcounts && s->qcow_version < 3) {
error_setg(errp, "Lazy refcounts require a qcow2 image with at least "
@@ -1471,7 +1472,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
* size for any qcow2 image.
*/
BlockDriverState* bs;
QCowHeader header;
QCowHeader *header;
uint8_t* refcount_table;
Error *local_err = NULL;
int ret;
@@ -1489,30 +1490,34 @@ static int qcow2_create2(const char *filename, int64_t total_size,
}
/* Write the header */
memset(&header, 0, sizeof(header));
header.magic = cpu_to_be32(QCOW_MAGIC);
header.version = cpu_to_be32(version);
header.cluster_bits = cpu_to_be32(cluster_bits);
header.size = cpu_to_be64(0);
header.l1_table_offset = cpu_to_be64(0);
header.l1_size = cpu_to_be32(0);
header.refcount_table_offset = cpu_to_be64(cluster_size);
header.refcount_table_clusters = cpu_to_be32(1);
header.refcount_order = cpu_to_be32(3 + REFCOUNT_SHIFT);
header.header_length = cpu_to_be32(sizeof(header));
QEMU_BUILD_BUG_ON((1 << MIN_CLUSTER_BITS) < sizeof(*header));
header = g_malloc0(cluster_size);
*header = (QCowHeader) {
.magic = cpu_to_be32(QCOW_MAGIC),
.version = cpu_to_be32(version),
.cluster_bits = cpu_to_be32(cluster_bits),
.size = cpu_to_be64(0),
.l1_table_offset = cpu_to_be64(0),
.l1_size = cpu_to_be32(0),
.refcount_table_offset = cpu_to_be64(cluster_size),
.refcount_table_clusters = cpu_to_be32(1),
.refcount_order = cpu_to_be32(3 + REFCOUNT_SHIFT),
.header_length = cpu_to_be32(sizeof(*header)),
};
if (flags & BLOCK_FLAG_ENCRYPT) {
header.crypt_method = cpu_to_be32(QCOW_CRYPT_AES);
header->crypt_method = cpu_to_be32(QCOW_CRYPT_AES);
} else {
header.crypt_method = cpu_to_be32(QCOW_CRYPT_NONE);
header->crypt_method = cpu_to_be32(QCOW_CRYPT_NONE);
}
if (flags & BLOCK_FLAG_LAZY_REFCOUNTS) {
header.compatible_features |=
header->compatible_features |=
cpu_to_be64(QCOW2_COMPAT_LAZY_REFCOUNTS);
}
ret = bdrv_pwrite(bs, 0, &header, sizeof(header));
ret = bdrv_pwrite(bs, 0, header, cluster_size);
g_free(header);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not write qcow2 header");
goto out;
@@ -1893,6 +1898,8 @@ static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = (s->qcow_version >= 3);
bdi->cluster_size = s->cluster_size;
bdi->vm_state_offset = qcow2_vm_state_offset(s);
return 0;
block/qcow2.h
+4 -1
View File
@@ -488,7 +488,10 @@ int qcow2_snapshot_delete(BlockDriverState *bs,
const char *name,
Error **errp);
int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab);
int qcow2_snapshot_load_tmp(BlockDriverState *bs, const char *snapshot_name);
int qcow2_snapshot_load_tmp(BlockDriverState *bs,
const char *snapshot_id,
const char *name,
Error **errp);
void qcow2_free_snapshots(BlockDriverState *bs);
int qcow2_read_snapshots(BlockDriverState *bs);
block/qed.c
+3
View File
@@ -495,6 +495,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
}
}
bs->bl.write_zeroes_alignment = s->header.cluster_size >> BDRV_SECTOR_BITS;
s->need_check_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
qed_need_check_timer_cb, s);
@@ -1475,6 +1476,8 @@ static int bdrv_qed_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
memset(bdi, 0, sizeof(*bdi));
bdi->cluster_size = s->header.cluster_size;
bdi->is_dirty = s->header.features & QED_F_NEED_CHECK;
bdi->unallocated_blocks_are_zero = true;
bdi->can_write_zeroes_with_unmap = true;
return 0;
}
block/raw-aio.h
+2 -1
View File
@@ -21,9 +21,10 @@
#define QEMU_AIO_IOCTL 0x0004
#define QEMU_AIO_FLUSH 0x0008
#define QEMU_AIO_DISCARD 0x0010
#define QEMU_AIO_WRITE_ZEROES 0x0020
#define QEMU_AIO_TYPE_MASK \
(QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \
QEMU_AIO_DISCARD)
QEMU_AIO_DISCARD|QEMU_AIO_WRITE_ZEROES)
/* AIO flags */
#define QEMU_AIO_MISALIGNED 0x1000
block/raw-posix.c
+167 -8
View File
@@ -139,9 +139,11 @@ typedef struct BDRVRawState {
void *aio_ctx;
#endif
#ifdef CONFIG_XFS
bool is_xfs : 1;
bool is_xfs:1;
#endif
bool has_discard : 1;
bool has_discard:1;
bool has_write_zeroes:1;
bool discard_zeroes:1;
} BDRVRawState;
typedef struct BDRVRawReopenState {
@@ -283,6 +285,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
Error *local_err = NULL;
const char *filename;
int fd, ret;
struct stat st;
opts = qemu_opts_create_nofail(&raw_runtime_opts);
qemu_opts_absorb_qdict(opts, options, &local_err);
@@ -323,10 +326,38 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
}
#endif
s->has_discard = 1;
s->has_discard = true;
s->has_write_zeroes = true;
if (fstat(s->fd, &st) < 0) {
error_setg_errno(errp, errno, "Could not stat file");
goto fail;
}
if (S_ISREG(st.st_mode)) {
s->discard_zeroes = true;
}
if (S_ISBLK(st.st_mode)) {
#ifdef BLKDISCARDZEROES
unsigned int arg;
if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) {
s->discard_zeroes = true;
}
#endif
#ifdef __linux__
/* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do
* not rely on the contents of discarded blocks unless using O_DIRECT.
* Same for BLKZEROOUT.
*/
if (!(bs->open_flags & BDRV_O_NOCACHE)) {
s->discard_zeroes = false;
s->has_write_zeroes = false;
}
#endif
}
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
s->is_xfs = true;
}
#endif
@@ -675,6 +706,23 @@ static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb)
}
#ifdef CONFIG_XFS
static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes)
{
struct xfs_flock64 fl;
memset(&fl, 0, sizeof(fl));
fl.l_whence = SEEK_SET;
fl.l_start = offset;
fl.l_len = bytes;
if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) {
DEBUG_BLOCK_PRINT("cannot write zero range (%s)\n", strerror(errno));
return -errno;
}
return 0;
}
static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes)
{
struct xfs_flock64 fl;
@@ -693,13 +741,49 @@ static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes)
}
#endif
static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
{
int ret = -EOPNOTSUPP;
BDRVRawState *s = aiocb->bs->opaque;
if (s->has_write_zeroes == 0) {
return -ENOTSUP;
}
if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
#ifdef BLKZEROOUT
do {
uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) {
return 0;
}
} while (errno == EINTR);
ret = -errno;
#endif
} else {
#ifdef CONFIG_XFS
if (s->is_xfs) {
return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes);
}
#endif
}
if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
ret == -ENOTTY) {
s->has_write_zeroes = false;
ret = -ENOTSUP;
}
return ret;
}
static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
{
int ret = -EOPNOTSUPP;
BDRVRawState *s = aiocb->bs->opaque;
if (s->has_discard == 0) {
return 0;
if (!s->has_discard) {
return -ENOTSUP;
}
if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
@@ -734,8 +818,8 @@ static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
if (ret == -ENODEV || ret == -ENOSYS || ret == -EOPNOTSUPP ||
ret == -ENOTTY) {
s->has_discard = 0;
ret = 0;
s->has_discard = false;
ret = -ENOTSUP;
}
return ret;
}
@@ -777,6 +861,9 @@ static int aio_worker(void *arg)
case QEMU_AIO_DISCARD:
ret = handle_aiocb_discard(aiocb);
break;
case QEMU_AIO_WRITE_ZEROES:
ret = handle_aiocb_write_zeroes(aiocb);
break;
default:
fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
ret = -EINVAL;
@@ -787,6 +874,29 @@ static int aio_worker(void *arg)
return ret;
}
static int paio_submit_co(BlockDriverState *bs, int fd,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
int type)
{
RawPosixAIOData *acb = g_slice_new(RawPosixAIOData);
ThreadPool *pool;
acb->bs = bs;
acb->aio_type = type;
acb->aio_fildes = fd;
if (qiov) {
acb->aio_iov = qiov->iov;
acb->aio_niov = qiov->niov;
}
acb->aio_nbytes = nb_sectors * 512;
acb->aio_offset = sector_num * 512;
trace_paio_submit_co(sector_num, nb_sectors, type);
pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
return thread_pool_submit_co(pool, aio_worker, acb);
}
static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque, int type)
@@ -1199,6 +1309,31 @@ static coroutine_fn BlockDriverAIOCB *raw_aio_discard(BlockDriverState *bs,
cb, opaque, QEMU_AIO_DISCARD);
}
static int coroutine_fn raw_co_write_zeroes(
BlockDriverState *bs, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags)
{
BDRVRawState *s = bs->opaque;
if (!(flags & BDRV_REQ_MAY_UNMAP)) {
return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors,
QEMU_AIO_WRITE_ZEROES);
} else if (s->discard_zeroes) {
return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors,
QEMU_AIO_DISCARD);
}
return -ENOTSUP;
}
static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVRawState *s = bs->opaque;
bdi->unallocated_blocks_are_zero = s->discard_zeroes;
bdi->can_write_zeroes_with_unmap = s->discard_zeroes;
return 0;
}
static QEMUOptionParameter raw_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@@ -1222,6 +1357,7 @@ static BlockDriver bdrv_file = {
.bdrv_create = raw_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = raw_co_get_block_status,
.bdrv_co_write_zeroes = raw_co_write_zeroes,
.bdrv_aio_readv = raw_aio_readv,
.bdrv_aio_writev = raw_aio_writev,
@@ -1230,6 +1366,7 @@ static BlockDriver bdrv_file = {
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_info = raw_get_info,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
@@ -1525,6 +1662,26 @@ static coroutine_fn BlockDriverAIOCB *hdev_aio_discard(BlockDriverState *bs,
cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
}
static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, BdrvRequestFlags flags)
{
BDRVRawState *s = bs->opaque;
int rc;
rc = fd_open(bs);
if (rc < 0) {
return rc;
}
if (!(flags & BDRV_REQ_MAY_UNMAP)) {
return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors,
QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV);
} else if (s->discard_zeroes) {
return paio_submit_co(bs, s->fd, sector_num, NULL, nb_sectors,
QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
}
return -ENOTSUP;
}
static int hdev_create(const char *filename, QEMUOptionParameter *options,
Error **errp)
{
@@ -1577,6 +1734,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_reopen_abort = raw_reopen_abort,
.bdrv_create = hdev_create,
.create_options = raw_create_options,
.bdrv_co_write_zeroes = hdev_co_write_zeroes,
.bdrv_aio_readv = raw_aio_readv,
.bdrv_aio_writev = raw_aio_writev,
@@ -1585,6 +1743,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
.bdrv_get_info = raw_get_info,
.bdrv_get_allocated_file_size
= raw_get_allocated_file_size,
block/snapshot.c
+74 -3
View File
@@ -25,6 +25,24 @@
#include "block/snapshot.h"
#include "block/block_int.h"
QemuOptsList internal_snapshot_opts = {
.name = "snapshot",
.head = QTAILQ_HEAD_INITIALIZER(internal_snapshot_opts.head),
.desc = {
{
.name = SNAPSHOT_OPT_ID,
.type = QEMU_OPT_STRING,
.help = "snapshot id"
},{
.name = SNAPSHOT_OPT_NAME,
.type = QEMU_OPT_STRING,
.help = "snapshot name"
},{
/* end of list */
}
},
};
int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
const char *name)
{
@@ -194,7 +212,7 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
* If only @snapshot_id is specified, delete the first one with id
* @snapshot_id.
* If only @name is specified, delete the first one with name @name.
* if none is specified, return -ENINVAL.
* if none is specified, return -EINVAL.
*
* Returns: 0 on success, -errno on failure. If @bs is not inserted, return
* -ENOMEDIUM. If @snapshot_id and @name are both NULL, return -EINVAL. If @bs
@@ -265,18 +283,71 @@ int bdrv_snapshot_list(BlockDriverState *bs,
return -ENOTSUP;
}
/**
* Temporarily load an internal snapshot by @snapshot_id and @name.
* @bs: block device used in the operation
* @snapshot_id: unique snapshot ID, or NULL
* @name: snapshot name, or NULL
* @errp: location to store error
*
* If both @snapshot_id and @name are specified, load the first one with
* id @snapshot_id and name @name.
* If only @snapshot_id is specified, load the first one with id
* @snapshot_id.
* If only @name is specified, load the first one with name @name.
* if none is specified, return -EINVAL.
*
* Returns: 0 on success, -errno on fail. If @bs is not inserted, return
* -ENOMEDIUM. If @bs is not readonly, return -EINVAL. If @bs did not support
* internal snapshot, return -ENOTSUP. If qemu can't find a matching @id and
* @name, return -ENOENT. If @errp != NULL, it will always be filled on
* failure.
*/
int bdrv_snapshot_load_tmp(BlockDriverState *bs,
const char *snapshot_name)
const char *snapshot_id,
const char *name,
Error **errp)
{
BlockDriver *drv = bs->drv;
if (!drv) {
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
return -ENOMEDIUM;
}
if (!snapshot_id && !name) {
error_setg(errp, "snapshot_id and name are both NULL");
return -EINVAL;
}
if (!bs->read_only) {
error_setg(errp, "Device is not readonly");
return -EINVAL;
}
if (drv->bdrv_snapshot_load_tmp) {
return drv->bdrv_snapshot_load_tmp(bs, snapshot_name);
return drv->bdrv_snapshot_load_tmp(bs, snapshot_id, name, errp);
}
error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
drv->format_name, bdrv_get_device_name(bs),
"temporarily load internal snapshot");
return -ENOTSUP;
}
int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
const char *id_or_name,
Error **errp)
{
int ret;
Error *local_err = NULL;
ret = bdrv_snapshot_load_tmp(bs, id_or_name, NULL, &local_err);
if (ret == -ENOENT || ret == -EINVAL) {
error_free(local_err);
local_err = NULL;
ret = bdrv_snapshot_load_tmp(bs, NULL, id_or_name, &local_err);
}
if (error_is_set(&local_err)) {
error_propagate(errp, local_err);
}
return ret;
}
block/vdi.c
+1
View File
@@ -331,6 +331,7 @@ static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
logout("\n");
bdi->cluster_size = s->block_size;
bdi->vm_state_offset = 0;
bdi->unallocated_blocks_are_zero = true;
return 0;
}
block/vhdx.c
+13
View File
@@ -1043,6 +1043,18 @@ static void vhdx_block_translate(BDRVVHDXState *s, int64_t sector_num,
}
static int vhdx_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVVHDXState *s = bs->opaque;
bdi->cluster_size = s->block_size;
bdi->unallocated_blocks_are_zero =
(s->params.data_bits & VHDX_PARAMS_HAS_PARENT) == 0;
return 0;
}
static coroutine_fn int vhdx_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
@@ -1885,6 +1897,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_co_readv = vhdx_co_readv,
.bdrv_co_writev = vhdx_co_writev,
.bdrv_create = vhdx_create,
.bdrv_get_info = vhdx_get_info,
.create_options = vhdx_create_options,
};
block/vmdk.c
+42 -24
View File
@@ -428,6 +428,10 @@ static int vmdk_add_extent(BlockDriverState *bs,
extent->l2_size = l2_size;
extent->cluster_sectors = flat ? sectors : cluster_sectors;
if (!flat) {
bs->bl.write_zeroes_alignment =
MAX(bs->bl.write_zeroes_alignment, cluster_sectors);
}
if (s->num_extents > 1) {
extent->end_sector = (*(extent - 1)).end_sector + extent->sectors;
} else {
@@ -1596,7 +1600,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
Error **errp)
{
int fd, idx = 0;
char desc[BUF_SIZE];
char *desc = NULL;
int64_t total_size = 0, filesize;
const char *adapter_type = NULL;
const char *backing_file = NULL;
@@ -1604,7 +1608,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
int flags = 0;
int ret = 0;
bool flat, split, compress;
char ext_desc_lines[BUF_SIZE] = "";
GString *ext_desc_lines;
char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX];
const int64_t split_size = 0x80000000; /* VMDK has constant split size */
const char *desc_extent_line;
@@ -1632,8 +1636,11 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
"ddb.geometry.sectors = \"63\"\n"
"ddb.adapterType = \"%s\"\n";
ext_desc_lines = g_string_new(NULL);
if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) {
return -EINVAL;
ret = -EINVAL;
goto exit;
}
/* Read out options */
while (options && options->name) {
@@ -1659,7 +1666,8 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
strcmp(adapter_type, "lsilogic") &&
strcmp(adapter_type, "legacyESX")) {
error_setg(errp, "Unknown adapter type: '%s'", adapter_type);
return -EINVAL;
ret = -EINVAL;
goto exit;
}
if (strcmp(adapter_type, "ide") != 0) {
/* that's the number of heads with which vmware operates when
@@ -1675,7 +1683,8 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
strcmp(fmt, "twoGbMaxExtentFlat") &&
strcmp(fmt, "streamOptimized")) {
error_setg(errp, "Unknown subformat: '%s'", fmt);
return -EINVAL;
ret = -EINVAL;
goto exit;
}
split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
strcmp(fmt, "twoGbMaxExtentSparse"));
@@ -1689,22 +1698,25 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
}
if (flat && backing_file) {
error_setg(errp, "Flat image can't have backing file");
return -ENOTSUP;
ret = -ENOTSUP;
goto exit;
}
if (flat && zeroed_grain) {
error_setg(errp, "Flat image can't enable zeroed grain");
return -ENOTSUP;
ret = -ENOTSUP;
goto exit;
}
if (backing_file) {
BlockDriverState *bs = bdrv_new("");
ret = bdrv_open(bs, backing_file, NULL, BDRV_O_NO_BACKING, NULL, errp);
if (ret != 0) {
bdrv_unref(bs);
return ret;
goto exit;
}
if (strcmp(bs->drv->format_name, "vmdk")) {
bdrv_unref(bs);
return -EINVAL;
ret = -EINVAL;
goto exit;
}
parent_cid = vmdk_read_cid(bs, 0);
bdrv_unref(bs);
@@ -1738,25 +1750,27 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
if (vmdk_create_extent(ext_filename, size,
flat, compress, zeroed_grain)) {
return -EINVAL;
ret = -EINVAL;
goto exit;
}
filesize -= size;
/* Format description line */
snprintf(desc_line, sizeof(desc_line),
desc_extent_line, size / 512, desc_filename);
pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line);
g_string_append(ext_desc_lines, desc_line);
}
/* generate descriptor file */
snprintf(desc, sizeof(desc), desc_template,
(unsigned int)time(NULL),
parent_cid,
fmt,
parent_desc_line,
ext_desc_lines,
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
total_size / (int64_t)(63 * number_heads * 512), number_heads,
adapter_type);
desc = g_strdup_printf(desc_template,
(unsigned int)time(NULL),
parent_cid,
fmt,
parent_desc_line,
ext_desc_lines->str,
(flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
total_size / (int64_t)(63 * number_heads * 512),
number_heads,
adapter_type);
if (split || flat) {
fd = qemu_open(filename,
O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
@@ -1767,21 +1781,25 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
0644);
}
if (fd < 0) {
return -errno;
ret = -errno;
goto exit;
}
/* the descriptor offset = 0x200 */
if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) {
ret = -errno;
goto exit;
goto close_exit;
}
ret = qemu_write_full(fd, desc, strlen(desc));
if (ret != strlen(desc)) {
ret = -errno;
goto exit;
goto close_exit;
}
ret = 0;
exit:
close_exit:
qemu_close(fd);
exit:
g_free(desc);
g_string_free(ext_desc_lines, true);
return ret;
}
block/vpc.c
+15
View File
@@ -455,6 +455,19 @@ fail:
return -1;
}
static int vpc_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVVPCState *s = (BDRVVPCState *)bs->opaque;
VHDFooter *footer = (VHDFooter *) s->footer_buf;
if (cpu_to_be32(footer->type) != VHD_FIXED) {
bdi->cluster_size = s->block_size;
}
bdi->unallocated_blocks_are_zero = true;
return 0;
}
static int vpc_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
@@ -857,6 +870,8 @@ static BlockDriver bdrv_vpc = {
.bdrv_read = vpc_co_read,
.bdrv_write = vpc_co_write,
.bdrv_get_info = vpc_get_info,
.create_options = vpc_create_options,
.bdrv_has_zero_init = vpc_has_zero_init,
};
hw/scsi/scsi-disk.c
+131 -23
View File
@@ -41,6 +41,7 @@ do { printf("scsi-disk: " fmt , ## __VA_ARGS__); } while (0)
#include <scsi/sg.h>
#endif
#define SCSI_WRITE_SAME_MAX 524288
#define SCSI_DMA_BUF_SIZE 131072
#define SCSI_MAX_INQUIRY_LEN 256
#define SCSI_MAX_MODE_LEN 256
@@ -634,6 +635,8 @@ static int scsi_disk_emulate_inquiry(SCSIRequest *req, uint8_t *outbuf)
buflen = 0x40;
memset(outbuf + 4, 0, buflen - 4);
outbuf[4] = 0x1; /* wsnz */
/* optimal transfer length granularity */
outbuf[6] = (min_io_size >> 8) & 0xff;
outbuf[7] = min_io_size & 0xff;
@@ -1543,10 +1546,16 @@ done:
static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
uint8_t *p = inbuf;
int len = r->req.cmd.xfer;
UnmapCBData *data;
/* Reject ANCHOR=1. */
if (r->req.cmd.buf[1] & 0x1) {
goto invalid_field;
}
if (len < 8) {
goto invalid_param_len;
}
@@ -1560,6 +1569,11 @@ static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf)
goto invalid_param_len;
}
if (bdrv_is_read_only(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
return;
}
data = g_new0(UnmapCBData, 1);
data->r = r;
data->inbuf = &p[8];
@@ -1572,6 +1586,115 @@ static void scsi_disk_emulate_unmap(SCSIDiskReq *r, uint8_t *inbuf)
invalid_param_len:
scsi_check_condition(r, SENSE_CODE(INVALID_PARAM_LEN));
return;
invalid_field:
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
}
typedef struct WriteSameCBData {
SCSIDiskReq *r;
int64_t sector;
int nb_sectors;
QEMUIOVector qiov;
struct iovec iov;
} WriteSameCBData;
static void scsi_write_same_complete(void *opaque, int ret)
{
WriteSameCBData *data = opaque;
SCSIDiskReq *r = data->r;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
assert(r->req.aiocb != NULL);
r->req.aiocb = NULL;
bdrv_acct_done(s->qdev.conf.bs, &r->acct);
if (r->req.io_canceled) {
goto done;
}
if (ret < 0) {
if (scsi_handle_rw_error(r, -ret)) {
goto done;
}
}
data->nb_sectors -= data->iov.iov_len / 512;
data->sector += data->iov.iov_len / 512;
data->iov.iov_len = MIN(data->nb_sectors * 512, data->iov.iov_len);
if (data->iov.iov_len) {
bdrv_acct_start(s->qdev.conf.bs, &r->acct, data->iov.iov_len, BDRV_ACCT_WRITE);
r->req.aiocb = bdrv_aio_writev(s->qdev.conf.bs, data->sector,
&data->qiov, data->iov.iov_len / 512,
scsi_write_same_complete, r);
return;
}
scsi_req_complete(&r->req, GOOD);
done:
if (!r->req.io_canceled) {
scsi_req_unref(&r->req);
}
qemu_vfree(data->iov.iov_base);
g_free(data);
}
static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf)
{
SCSIRequest *req = &r->req;
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
uint32_t nb_sectors = scsi_data_cdb_length(r->req.cmd.buf);
WriteSameCBData *data;
uint8_t *buf;
int i;
/* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */
if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) {
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
return;
}
if (bdrv_is_read_only(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
return;
}
if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) {
scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE));
return;
}
if (buffer_is_zero(inbuf, s->qdev.blocksize)) {
int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0;
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
bdrv_acct_start(s->qdev.conf.bs, &r->acct, nb_sectors * s->qdev.blocksize,
BDRV_ACCT_WRITE);
r->req.aiocb = bdrv_aio_write_zeroes(s->qdev.conf.bs,
r->req.cmd.lba * (s->qdev.blocksize / 512),
nb_sectors * (s->qdev.blocksize / 512),
flags, scsi_aio_complete, r);
return;
}
data = g_new0(WriteSameCBData, 1);
data->r = r;
data->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
data->nb_sectors = nb_sectors * (s->qdev.blocksize / 512);
data->iov.iov_len = MIN(data->nb_sectors * 512, SCSI_WRITE_SAME_MAX);
data->iov.iov_base = buf = qemu_blockalign(s->qdev.conf.bs, data->iov.iov_len);
qemu_iovec_init_external(&data->qiov, &data->iov, 1);
for (i = 0; i < data->iov.iov_len; i += s->qdev.blocksize) {
memcpy(&buf[i], inbuf, s->qdev.blocksize);
}
scsi_req_ref(&r->req);
bdrv_acct_start(s->qdev.conf.bs, &r->acct, data->iov.iov_len, BDRV_ACCT_WRITE);
r->req.aiocb = bdrv_aio_writev(s->qdev.conf.bs, data->sector,
&data->qiov, data->iov.iov_len / 512,
scsi_write_same_complete, data);
}
static void scsi_disk_emulate_write_data(SCSIRequest *req)
@@ -1597,6 +1720,10 @@ static void scsi_disk_emulate_write_data(SCSIRequest *req)
scsi_disk_emulate_unmap(r, r->iov.iov_base);
break;
case WRITE_SAME_10:
case WRITE_SAME_16:
scsi_disk_emulate_write_same(r, r->iov.iov_base);
break;
default:
abort();
}
@@ -1839,29 +1966,10 @@ static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
break;
case WRITE_SAME_10:
case WRITE_SAME_16:
nb_sectors = scsi_data_cdb_length(r->req.cmd.buf);
if (bdrv_is_read_only(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
return 0;
}
if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) {
goto illegal_lba;
}
/*
* We only support WRITE SAME with the unmap bit set for now.
*/
if (!(req->cmd.buf[1] & 0x8)) {
goto illegal_request;
}
/* The request is used as the AIO opaque value, so add a ref. */
scsi_req_ref(&r->req);
r->req.aiocb = bdrv_aio_discard(s->qdev.conf.bs,
r->req.cmd.lba * (s->qdev.blocksize / 512),
nb_sectors * (s->qdev.blocksize / 512),
scsi_aio_complete, r);
return 0;
DPRINTF("WRITE SAME %d (len %lu)\n",
req->cmd.buf[0] == WRITE_SAME_10 ? 10 : 16,
(long)r->req.cmd.xfer);
break;
default:
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[0]);
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
include/block/block.h
+4
View File
@@ -216,6 +216,9 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags);
BlockDriverAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags,
BlockDriverCompletionFunc *cb, void *opaque);
int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags);
int bdrv_writev(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov);
int bdrv_pread(BlockDriverState *bs, int64_t offset,
@@ -311,6 +314,7 @@ typedef struct BlockRequest {
/* Fields to be filled by multiwrite caller */
int64_t sector;
int nb_sectors;
int flags;
QEMUIOVector *qiov;
BlockDriverCompletionFunc *cb;
void *opaque;
include/block/block_int.h
+6 -1
View File
@@ -176,7 +176,9 @@ struct BlockDriver {
int (*bdrv_snapshot_list)(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
const char *snapshot_name);
const char *snapshot_id,
const char *name,
Error **errp);
int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs);
@@ -245,6 +247,9 @@ typedef struct BlockLimits {
/* optimal alignment for write zeroes requests in sectors */
int64_t write_zeroes_alignment;
/* optimal transfer length in sectors */
int opt_transfer_length;
} BlockLimits;
/*

Some files were not shown because too many files have changed in this diff Show More