From: Alberto Garcia <berto@igalia.com>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>,
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
Alberto Garcia <berto@igalia.com>,
qemu-block@nongnu.org, Derek Su <dereksu@qnap.com>,
Max Reitz <mreitz@redhat.com>
Subject: [PATCH v6 18/32] qcow2: Replace QCOW2_CLUSTER_* with QCOW2_SUBCLUSTER_*
Date: Sun, 24 May 2020 16:51:38 +0200 [thread overview]
Message-ID: <b2d5c17d2be4ec77f5e8598729f5acaa6d6b061b.1590331741.git.berto@igalia.com> (raw)
In-Reply-To: <cover.1590331741.git.berto@igalia.com>
In order to support extended L2 entries some functions of the qcow2
driver need to start dealing with subclusters instead of clusters.
qcow2_get_host_offset() is modified to return the subcluster type
instead of the cluster type, and all callers are updated to replace
all values of QCow2ClusterType with their QCow2SubclusterType
equivalents.
This patch only changes the data types, there are no semantic changes.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
block/qcow2.h | 2 +-
block/qcow2-cluster.c | 10 +++----
block/qcow2.c | 70 ++++++++++++++++++++++---------------------
3 files changed, 42 insertions(+), 40 deletions(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index 9cd7cbd895..84c06d9bba 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -894,7 +894,7 @@ int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
int qcow2_get_host_offset(BlockDriverState *bs, uint64_t offset,
unsigned int *bytes, uint64_t *host_offset,
- QCow2ClusterType *cluster_type);
+ QCow2SubclusterType *subcluster_type);
int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
unsigned int *bytes, uint64_t *host_offset,
QCowL2Meta **m);
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index 1e5681b0c6..ed7b92dbb2 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -564,15 +564,15 @@ static int coroutine_fn do_perform_cow_write(BlockDriverState *bs,
* offset that we are interested in.
*
* On exit, *bytes is the number of bytes starting at offset that have the same
- * cluster type and (if applicable) are stored contiguously in the image file.
- * The cluster type is stored in *cluster_type.
- * Compressed clusters are always returned one by one.
+ * subcluster type and (if applicable) are stored contiguously in the image
+ * file. The subcluster type is stored in *subcluster_type.
+ * Compressed clusters are always processed one by one.
*
* Returns 0 on success, -errno in error cases.
*/
int qcow2_get_host_offset(BlockDriverState *bs, uint64_t offset,
unsigned int *bytes, uint64_t *host_offset,
- QCow2ClusterType *cluster_type)
+ QCow2SubclusterType *subcluster_type)
{
BDRVQcow2State *s = bs->opaque;
unsigned int l2_index;
@@ -713,7 +713,7 @@ out:
assert(bytes_available - offset_in_cluster <= UINT_MAX);
*bytes = bytes_available - offset_in_cluster;
- *cluster_type = type;
+ *subcluster_type = qcow2_cluster_to_subcluster_type(type);
return 0;
diff --git a/block/qcow2.c b/block/qcow2.c
index 2806642f68..5303b0070b 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2033,7 +2033,7 @@ static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs,
BDRVQcow2State *s = bs->opaque;
uint64_t host_offset;
unsigned int bytes;
- QCow2ClusterType type;
+ QCow2SubclusterType type;
int ret, status = 0;
qemu_co_mutex_lock(&s->lock);
@@ -2053,15 +2053,16 @@ static int coroutine_fn qcow2_co_block_status(BlockDriverState *bs,
*pnum = bytes;
- if ((type == QCOW2_CLUSTER_NORMAL || type == QCOW2_CLUSTER_ZERO_ALLOC) &&
- !s->crypto) {
+ if ((type == QCOW2_SUBCLUSTER_NORMAL ||
+ type == QCOW2_SUBCLUSTER_ZERO_ALLOC) && !s->crypto) {
*map = host_offset;
*file = s->data_file->bs;
status |= BDRV_BLOCK_OFFSET_VALID;
}
- if (type == QCOW2_CLUSTER_ZERO_PLAIN || type == QCOW2_CLUSTER_ZERO_ALLOC) {
+ if (type == QCOW2_SUBCLUSTER_ZERO_PLAIN ||
+ type == QCOW2_SUBCLUSTER_ZERO_ALLOC) {
status |= BDRV_BLOCK_ZERO;
- } else if (type != QCOW2_CLUSTER_UNALLOCATED) {
+ } else if (type != QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN) {
status |= BDRV_BLOCK_DATA;
}
if (s->metadata_preallocation && (status & BDRV_BLOCK_DATA) &&
@@ -2158,7 +2159,7 @@ typedef struct Qcow2AioTask {
AioTask task;
BlockDriverState *bs;
- QCow2ClusterType cluster_type; /* only for read */
+ QCow2SubclusterType subcluster_type; /* only for read */
uint64_t host_offset; /* or full descriptor in compressed clusters */
uint64_t offset;
uint64_t bytes;
@@ -2171,7 +2172,7 @@ static coroutine_fn int qcow2_co_preadv_task_entry(AioTask *task);
static coroutine_fn int qcow2_add_task(BlockDriverState *bs,
AioTaskPool *pool,
AioTaskFunc func,
- QCow2ClusterType cluster_type,
+ QCow2SubclusterType subcluster_type,
uint64_t host_offset,
uint64_t offset,
uint64_t bytes,
@@ -2185,7 +2186,7 @@ static coroutine_fn int qcow2_add_task(BlockDriverState *bs,
*task = (Qcow2AioTask) {
.task.func = func,
.bs = bs,
- .cluster_type = cluster_type,
+ .subcluster_type = subcluster_type,
.qiov = qiov,
.host_offset = host_offset,
.offset = offset,
@@ -2196,7 +2197,7 @@ static coroutine_fn int qcow2_add_task(BlockDriverState *bs,
trace_qcow2_add_task(qemu_coroutine_self(), bs, pool,
func == qcow2_co_preadv_task_entry ? "read" : "write",
- cluster_type, host_offset, offset, bytes,
+ subcluster_type, host_offset, offset, bytes,
qiov, qiov_offset);
if (!pool) {
@@ -2209,7 +2210,7 @@ static coroutine_fn int qcow2_add_task(BlockDriverState *bs,
}
static coroutine_fn int qcow2_co_preadv_task(BlockDriverState *bs,
- QCow2ClusterType cluster_type,
+ QCow2SubclusterType subc_type,
uint64_t host_offset,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov,
@@ -2217,24 +2218,24 @@ static coroutine_fn int qcow2_co_preadv_task(BlockDriverState *bs,
{
BDRVQcow2State *s = bs->opaque;
- switch (cluster_type) {
- case QCOW2_CLUSTER_ZERO_PLAIN:
- case QCOW2_CLUSTER_ZERO_ALLOC:
+ switch (subc_type) {
+ case QCOW2_SUBCLUSTER_ZERO_PLAIN:
+ case QCOW2_SUBCLUSTER_ZERO_ALLOC:
/* Both zero types are handled in qcow2_co_preadv_part */
g_assert_not_reached();
- case QCOW2_CLUSTER_UNALLOCATED:
+ case QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN:
assert(bs->backing); /* otherwise handled in qcow2_co_preadv_part */
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO);
return bdrv_co_preadv_part(bs->backing, offset, bytes,
qiov, qiov_offset, 0);
- case QCOW2_CLUSTER_COMPRESSED:
+ case QCOW2_SUBCLUSTER_COMPRESSED:
return qcow2_co_preadv_compressed(bs, host_offset,
offset, bytes, qiov, qiov_offset);
- case QCOW2_CLUSTER_NORMAL:
+ case QCOW2_SUBCLUSTER_NORMAL:
if (bs->encrypted) {
return qcow2_co_preadv_encrypted(bs, host_offset,
offset, bytes, qiov, qiov_offset);
@@ -2257,8 +2258,9 @@ static coroutine_fn int qcow2_co_preadv_task_entry(AioTask *task)
assert(!t->l2meta);
- return qcow2_co_preadv_task(t->bs, t->cluster_type, t->host_offset,
- t->offset, t->bytes, t->qiov, t->qiov_offset);
+ return qcow2_co_preadv_task(t->bs, t->subcluster_type,
+ t->host_offset, t->offset, t->bytes,
+ t->qiov, t->qiov_offset);
}
static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
@@ -2270,7 +2272,7 @@ static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
int ret = 0;
unsigned int cur_bytes; /* number of bytes in current iteration */
uint64_t host_offset = 0;
- QCow2ClusterType type;
+ QCow2SubclusterType type;
AioTaskPool *aio = NULL;
while (bytes != 0 && aio_task_pool_status(aio) == 0) {
@@ -2289,9 +2291,9 @@ static coroutine_fn int qcow2_co_preadv_part(BlockDriverState *bs,
goto out;
}
- if (type == QCOW2_CLUSTER_ZERO_PLAIN ||
- type == QCOW2_CLUSTER_ZERO_ALLOC ||
- (type == QCOW2_CLUSTER_UNALLOCATED && !bs->backing))
+ if (type == QCOW2_SUBCLUSTER_ZERO_PLAIN ||
+ type == QCOW2_SUBCLUSTER_ZERO_ALLOC ||
+ (type == QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN && !bs->backing))
{
qemu_iovec_memset(qiov, qiov_offset, 0, cur_bytes);
} else {
@@ -2524,7 +2526,7 @@ static coroutine_fn int qcow2_co_pwritev_task_entry(AioTask *task)
{
Qcow2AioTask *t = container_of(task, Qcow2AioTask, task);
- assert(!t->cluster_type);
+ assert(!t->subcluster_type);
return qcow2_co_pwritev_task(t->bs, t->host_offset,
t->offset, t->bytes, t->qiov, t->qiov_offset,
@@ -3844,7 +3846,7 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
if (head || tail) {
uint64_t off;
unsigned int nr;
- QCow2ClusterType type;
+ QCow2SubclusterType type;
assert(head + bytes <= s->cluster_size);
@@ -3862,9 +3864,9 @@ static coroutine_fn int qcow2_co_pwrite_zeroes(BlockDriverState *bs,
nr = s->cluster_size;
ret = qcow2_get_host_offset(bs, offset, &nr, &off, &type);
if (ret < 0 ||
- (type != QCOW2_CLUSTER_UNALLOCATED &&
- type != QCOW2_CLUSTER_ZERO_PLAIN &&
- type != QCOW2_CLUSTER_ZERO_ALLOC)) {
+ (type != QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN &&
+ type != QCOW2_SUBCLUSTER_ZERO_PLAIN &&
+ type != QCOW2_SUBCLUSTER_ZERO_ALLOC)) {
qemu_co_mutex_unlock(&s->lock);
return -ENOTSUP;
}
@@ -3928,7 +3930,7 @@ qcow2_co_copy_range_from(BlockDriverState *bs,
while (bytes != 0) {
uint64_t copy_offset = 0;
- QCow2ClusterType type;
+ QCow2SubclusterType type;
/* prepare next request */
cur_bytes = MIN(bytes, INT_MAX);
cur_write_flags = write_flags;
@@ -3940,7 +3942,7 @@ qcow2_co_copy_range_from(BlockDriverState *bs,
}
switch (type) {
- case QCOW2_CLUSTER_UNALLOCATED:
+ case QCOW2_SUBCLUSTER_UNALLOCATED_PLAIN:
if (bs->backing && bs->backing->bs) {
int64_t backing_length = bdrv_getlength(bs->backing->bs);
if (src_offset >= backing_length) {
@@ -3955,16 +3957,16 @@ qcow2_co_copy_range_from(BlockDriverState *bs,
}
break;
- case QCOW2_CLUSTER_ZERO_PLAIN:
- case QCOW2_CLUSTER_ZERO_ALLOC:
+ case QCOW2_SUBCLUSTER_ZERO_PLAIN:
+ case QCOW2_SUBCLUSTER_ZERO_ALLOC:
cur_write_flags |= BDRV_REQ_ZERO_WRITE;
break;
- case QCOW2_CLUSTER_COMPRESSED:
+ case QCOW2_SUBCLUSTER_COMPRESSED:
ret = -ENOTSUP;
goto out;
- case QCOW2_CLUSTER_NORMAL:
+ case QCOW2_SUBCLUSTER_NORMAL:
child = s->data_file;
break;
@@ -4482,7 +4484,7 @@ static coroutine_fn int qcow2_co_pwritev_compressed_task_entry(AioTask *task)
{
Qcow2AioTask *t = container_of(task, Qcow2AioTask, task);
- assert(!t->cluster_type && !t->l2meta);
+ assert(!t->subcluster_type && !t->l2meta);
return qcow2_co_pwritev_compressed_task(t->bs, t->offset, t->bytes, t->qiov,
t->qiov_offset);
--
2.20.1
next prev parent reply other threads:[~2020-05-24 15:11 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-24 14:51 [PATCH v6 00/32] Add subcluster allocation to qcow2 Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 01/32] qcow2: Make Qcow2AioTask store the full host offset Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 02/32] qcow2: Convert qcow2_get_cluster_offset() into qcow2_get_host_offset() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 03/32] qcow2: Add calculate_l2_meta() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 04/32] qcow2: Split cluster_needs_cow() out of count_cow_clusters() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 05/32] qcow2: Process QCOW2_CLUSTER_ZERO_ALLOC clusters in handle_copied() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 06/32] qcow2: Add get_l2_entry() and set_l2_entry() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 07/32] qcow2: Document the Extended L2 Entries feature Alberto Garcia
2020-05-26 19:54 ` Eric Blake
2020-05-24 14:51 ` [PATCH v6 08/32] qcow2: Add dummy has_subclusters() function Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 09/32] qcow2: Add subcluster-related fields to BDRVQcow2State Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 10/32] qcow2: Add offset_to_sc_index() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 11/32] qcow2: Add offset_into_subcluster() and size_to_subclusters() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 12/32] qcow2: Add l2_entry_size() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 13/32] qcow2: Update get/set_l2_entry() and add get/set_l2_bitmap() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 14/32] qcow2: Add QCow2SubclusterType and qcow2_get_subcluster_type() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 15/32] qcow2: Add qcow2_get_subcluster_range_type() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 16/32] qcow2: Add qcow2_cluster_is_allocated() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 17/32] qcow2: Add cluster type parameter to qcow2_get_host_offset() Alberto Garcia
2020-05-24 14:51 ` Alberto Garcia [this message]
2020-05-24 14:51 ` [PATCH v6 19/32] qcow2: Handle QCOW2_SUBCLUSTER_UNALLOCATED_ALLOC Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 20/32] qcow2: Add subcluster support to calculate_l2_meta() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 21/32] qcow2: Add subcluster support to qcow2_get_host_offset() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 22/32] qcow2: Add subcluster support to zero_in_l2_slice() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 23/32] qcow2: Add subcluster support to discard_in_l2_slice() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 24/32] qcow2: Add subcluster support to check_refcounts_l2() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 25/32] qcow2: Update L2 bitmap in qcow2_alloc_cluster_link_l2() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 26/32] qcow2: Clear the L2 bitmap when allocating a compressed cluster Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 27/32] qcow2: Add subcluster support to handle_alloc_space() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 28/32] qcow2: Add subcluster support to qcow2_co_pwrite_zeroes() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 29/32] qcow2: Add subcluster support to qcow2_measure() Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 30/32] qcow2: Add the 'extended_l2' option and the QCOW2_INCOMPAT_EXTL2 bit Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 31/32] qcow2: Assert that expand_zero_clusters_in_l1() does not support subclusters Alberto Garcia
2020-05-24 14:51 ` [PATCH v6 32/32] iotests: Add tests for qcow2 images with extended L2 entries Alberto Garcia
2020-05-24 16:29 ` [PATCH v6 00/32] Add subcluster allocation to qcow2 no-reply
2020-05-24 16:34 ` no-reply
2020-05-25 16:06 ` Alberto Garcia
2020-05-24 16:42 ` no-reply
2020-05-24 16:46 ` no-reply
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