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[Qemu-devel] [PATCH V19 5/8] Make block-cache.c be common interface
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From: |
Dongxu Wang |
|
Subject: |
[Qemu-devel] [PATCH V19 5/8] Make block-cache.c be common interface |
|
Date: |
Thu, 30 May 2013 18:00:22 +0800 |
From: Dong Xu Wang <address@hidden>
To use block-cache.c be common cache interface, we need to add
some parameter to identify cache's type.
Define a struct named BlockTableType, pass BlockTableType and
table size parameters to block cache initialization function.
v17-v18:
1) move struct to source file.
2) cluster_size->table_size.
Signed-off-by: Dong Xu Wang <address@hidden>
Signed-off-by: Dongxu Wang <address@hidden>
---
block/block-cache.c | 75 ++++++++++++++++++++++++++-------------------
block/qcow2-cluster.c | 30 +++++++++---------
block/qcow2-refcount.c | 30 +++++++++---------
block/qcow2.c | 7 +++--
block/qcow2.h | 24 ++-------------
include/block/block-cache.h | 55 +++++++++++++++++++++++++++++++++
trace-events | 1 +
7 files changed, 139 insertions(+), 83 deletions(-)
create mode 100644 include/block/block-cache.h
diff --git a/block/block-cache.c b/block/block-cache.c
index bc057a8..f5d75d1 100644
--- a/block/block-cache.c
+++ b/block/block-cache.c
@@ -1,4 +1,8 @@
/*
+ * QEMU Block Layer Cache
+ *
+ * This file is based on qcow2-cache.c, see its copyrights below:
+ *
* L2/refcount table cache for the QCOW2 format
*
* Copyright (c) 2010 Kevin Wolf <address@hidden>
@@ -24,11 +28,11 @@
#include "block/block_int.h"
#include "qemu-common.h"
-#include "qcow2.h"
#include "trace.h"
+#include "block/block-cache.h"
typedef struct BlockCachedTable {
- void* table;
+ void *table;
int64_t offset;
bool dirty;
int cache_hits;
@@ -36,30 +40,34 @@ typedef struct BlockCachedTable {
} BlockCachedTable;
struct BlockCache {
- BlockCachedTable* entries;
- struct BlockCache* depends;
- int size;
- bool depends_on_flush;
+ BlockCachedTable *entries;
+ struct BlockCache *depends;
+ int size;
+ size_t table_size;
+ BlockTableType table_type;
+ bool depends_on_flush;
};
-BlockCache *block_cache_create(BlockDriverState *bs, int num_tables)
+BlockCache *block_cache_create(BlockDriverState *bs, int num_tables,
+ size_t table_size, BlockTableType type)
{
- BDRVQcowState *s = bs->opaque;
BlockCache *c;
int i;
c = g_malloc0(sizeof(*c));
c->size = num_tables;
c->entries = g_malloc0(sizeof(*c->entries) * num_tables);
+ c->table_type = type;
+ c->table_size = table_size;
for (i = 0; i < c->size; i++) {
- c->entries[i].table = qemu_blockalign(bs, s->cluster_size);
+ c->entries[i].table = qemu_blockalign(bs, table_size);
}
return c;
}
-int block_cache_destroy(BlockDriverState* bs, BlockCache *c)
+int block_cache_destroy(BlockDriverState *bs, BlockCache *c)
{
int i;
@@ -91,15 +99,13 @@ static int block_cache_flush_dependency(BlockDriverState
*bs, BlockCache *c)
static int block_cache_entry_flush(BlockDriverState *bs, BlockCache *c, int i)
{
- BDRVQcowState *s = bs->opaque;
int ret = 0;
if (!c->entries[i].dirty || !c->entries[i].offset) {
return 0;
}
- trace_block_cache_entry_flush(qemu_coroutine_self(),
- c == s->l2_table_cache, i);
+ trace_block_cache_entry_flush(qemu_coroutine_self(), c->table_type, i);
if (c->depends) {
ret = block_cache_flush_dependency(bs, c);
@@ -114,14 +120,16 @@ static int block_cache_entry_flush(BlockDriverState *bs,
BlockCache *c, int i)
return ret;
}
- if (c == s->refcount_block_cache) {
+ if (c->table_type == BLOCK_TABLE_REF) {
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE_PART);
- } else if (c == s->l2_table_cache) {
+ } else if (c->table_type == BLOCK_TABLE_L2) {
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
+ } else if (c->table_type == BLOCK_TABLE_BITMAP) {
+ BLKDBG_EVENT(bs->file, BLKDBG_COW_WRITE);
}
- ret = bdrv_pwrite(bs->file, c->entries[i].offset, c->entries[i].table,
- s->cluster_size);
+ ret = bdrv_pwrite(bs->file, c->entries[i].offset,
+ c->entries[i].table, c->table_size);
if (ret < 0) {
return ret;
}
@@ -133,12 +141,11 @@ static int block_cache_entry_flush(BlockDriverState *bs,
BlockCache *c, int i)
int block_cache_flush(BlockDriverState *bs, BlockCache *c)
{
- BDRVQcowState *s = bs->opaque;
int result = 0;
int ret;
int i;
- trace_block_cache_flush(qemu_coroutine_self(), c == s->l2_table_cache);
+ trace_block_cache_flush(qemu_coroutine_self(), c->table_type);
for (i = 0; i < c->size; i++) {
ret = block_cache_entry_flush(bs, c, i);
@@ -157,8 +164,9 @@ int block_cache_flush(BlockDriverState *bs, BlockCache *c)
return result;
}
-int block_cache_set_dependency(BlockDriverState *bs, BlockCache *c,
- BlockCache *dependency)
+int block_cache_set_dependency(BlockDriverState *bs,
+ BlockCache *c,
+ BlockCache *dependency)
{
int ret;
@@ -216,13 +224,13 @@ static int block_cache_find_entry_to_replace(BlockCache
*c)
}
static int block_cache_do_get(BlockDriverState *bs, BlockCache *c,
- uint64_t offset, void **table, bool read_from_disk)
+ uint64_t offset, void **table,
+ bool read_from_disk)
{
- BDRVQcowState *s = bs->opaque;
int i;
int ret;
- trace_block_cache_get(qemu_coroutine_self(), c == s->l2_table_cache,
+ trace_block_cache_get(qemu_coroutine_self(), c->table_type,
offset, read_from_disk);
/* Check if the table is already cached */
@@ -235,7 +243,7 @@ static int block_cache_do_get(BlockDriverState *bs,
BlockCache *c,
/* If not, write a table back and replace it */
i = block_cache_find_entry_to_replace(c);
trace_block_cache_get_replace_entry(qemu_coroutine_self(),
- c == s->l2_table_cache, i);
+ c->table_type, i);
if (i < 0) {
return i;
}
@@ -246,14 +254,17 @@ static int block_cache_do_get(BlockDriverState *bs,
BlockCache *c,
}
trace_block_cache_get_read(qemu_coroutine_self(),
- c == s->l2_table_cache, i);
+ c->table_type, i);
c->entries[i].offset = 0;
if (read_from_disk) {
- if (c == s->l2_table_cache) {
+ if (c->table_type == BLOCK_TABLE_L2) {
BLKDBG_EVENT(bs->file, BLKDBG_L2_LOAD);
+ } else if (c->table_type == BLOCK_TABLE_BITMAP) {
+ BLKDBG_EVENT(bs->file, BLKDBG_COW_READ);
}
- ret = bdrv_pread(bs->file, offset, c->entries[i].table,
s->cluster_size);
+ ret = bdrv_pread(bs->file, offset, c->entries[i].table,
+ c->table_size);
if (ret < 0) {
return ret;
}
@@ -271,19 +282,19 @@ found:
*table = c->entries[i].table;
trace_block_cache_get_done(qemu_coroutine_self(),
- c == s->l2_table_cache, i);
+ c->table_type, i);
return 0;
}
int block_cache_get(BlockDriverState *bs, BlockCache *c, uint64_t offset,
- void **table)
+ void **table)
{
return block_cache_do_get(bs, c, offset, table, true);
}
-int block_cache_get_empty(BlockDriverState *bs, BlockCache *c, uint64_t offset,
- void **table)
+int block_cache_get_empty(BlockDriverState *bs, BlockCache *c,
+ uint64_t offset, void **table)
{
return block_cache_do_get(bs, c, offset, table, false);
}
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index ede64af..7a01c27 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -125,7 +125,8 @@ static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
BDRVQcowState *s = bs->opaque;
int ret;
- ret = block_cache_get(bs, s->l2_table_cache, l2_offset, (void**) l2_table);
+ ret = block_cache_get(bs, s->l2_table_cache, l2_offset,
+ (void **) l2_table);
return ret;
}
@@ -194,7 +195,8 @@ static int l2_allocate(BlockDriverState *bs, int l1_index,
uint64_t **table)
/* allocate a new entry in the l2 cache */
trace_qcow2_l2_allocate_get_empty(bs, l1_index);
- ret = block_cache_get_empty(bs, s->l2_table_cache, l2_offset, (void**)
table);
+ ret = block_cache_get_empty(bs, s->l2_table_cache, l2_offset,
+ (void **) table);
if (ret < 0) {
return ret;
}
@@ -211,14 +213,14 @@ static int l2_allocate(BlockDriverState *bs, int
l1_index, uint64_t **table)
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_COW_READ);
ret = block_cache_get(bs, s->l2_table_cache,
old_l2_offset & L1E_OFFSET_MASK,
- (void**) &old_table);
+ (void **) &old_table);
if (ret < 0) {
goto fail;
}
memcpy(l2_table, old_table, s->cluster_size);
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &old_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &old_table);
if (ret < 0) {
goto fail;
}
@@ -248,7 +250,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index,
uint64_t **table)
fail:
trace_qcow2_l2_allocate_done(bs, l1_index, ret);
- block_cache_put(bs, s->l2_table_cache, (void**) table);
+ block_cache_put(bs, s->l2_table_cache, (void **) table);
s->l1_table[l1_index] = old_l2_offset;
return ret;
}
@@ -484,7 +486,7 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t
offset,
abort();
}
- block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
nb_available = (c * s->cluster_sectors);
@@ -594,13 +596,13 @@ uint64_t
qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
* allocated. */
cluster_offset = be64_to_cpu(l2_table[l2_index]);
if (cluster_offset & L2E_OFFSET_MASK) {
- block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
return 0;
}
cluster_offset = qcow2_alloc_bytes(bs, compressed_size);
if (cluster_offset < 0) {
- block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
return 0;
}
@@ -617,7 +619,7 @@ uint64_t
qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE_COMPRESSED);
block_cache_entry_mark_dirty(s->l2_table_cache, l2_table);
l2_table[l2_index] = cpu_to_be64(cluster_offset);
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
return 0;
}
@@ -707,7 +709,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs,
QCowL2Meta *m)
}
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
goto err;
}
@@ -916,7 +918,7 @@ static int handle_copied(BlockDriverState *bs, uint64_t
guest_offset,
/* Cleanup */
out:
- pret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ pret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (pret < 0) {
return pret;
}
@@ -1044,7 +1046,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_t
guest_offset,
* wrong with our code. */
assert(nb_clusters > 0);
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
return ret;
}
@@ -1342,7 +1344,7 @@ static int discard_single_l2(BlockDriverState *bs,
uint64_t offset,
qcow2_free_any_clusters(bs, old_offset, 1);
}
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
return ret;
}
@@ -1421,7 +1423,7 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t
offset,
}
}
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
return ret;
}
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 332af27..c7427e8 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -99,7 +99,7 @@ static int get_refcount(BlockDriverState *bs, int64_t
cluster_index)
return 0;
ret = block_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
- (void**) &refcount_block);
+ (void **) &refcount_block);
if (ret < 0) {
return ret;
}
@@ -109,7 +109,7 @@ static int get_refcount(BlockDriverState *bs, int64_t
cluster_index)
refcount = be16_to_cpu(refcount_block[block_index]);
ret = block_cache_put(bs, s->refcount_block_cache,
- (void**) &refcount_block);
+ (void **) &refcount_block);
if (ret < 0) {
return ret;
}
@@ -172,7 +172,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
/* If it's already there, we're done */
if (refcount_block_offset) {
return load_refcount_block(bs, refcount_block_offset,
- (void**) refcount_block);
+ (void **) refcount_block);
}
}
@@ -221,7 +221,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
if (in_same_refcount_block(s, new_block, cluster_index <<
s->cluster_bits)) {
/* Zero the new refcount block before updating it */
ret = block_cache_get_empty(bs, s->refcount_block_cache, new_block,
- (void**) refcount_block);
+ (void **) refcount_block);
if (ret < 0) {
goto fail_block;
}
@@ -248,7 +248,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
/* Initialize the new refcount block only after updating its refcount,
* update_refcount uses the refcount cache itself */
ret = block_cache_get_empty(bs, s->refcount_block_cache, new_block,
- (void**) refcount_block);
+ (void **) refcount_block);
if (ret < 0) {
goto fail_block;
}
@@ -279,7 +279,8 @@ static int alloc_refcount_block(BlockDriverState *bs,
return 0;
}
- ret = block_cache_put(bs, s->refcount_block_cache, (void**)
refcount_block);
+ ret = block_cache_put(bs, s->refcount_block_cache,
+ (void **) refcount_block);
if (ret < 0) {
goto fail_block;
}
@@ -402,7 +403,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
qcow2_free_clusters(bs, old_table_offset, old_table_size *
sizeof(uint64_t));
s->free_cluster_index = old_free_cluster_index;
- ret = load_refcount_block(bs, new_block, (void**) refcount_block);
+ ret = load_refcount_block(bs, new_block, (void **) refcount_block);
if (ret < 0) {
return ret;
}
@@ -413,7 +414,7 @@ fail_table:
g_free(new_table);
fail_block:
if (*refcount_block != NULL) {
- block_cache_put(bs, s->refcount_block_cache, (void**) refcount_block);
+ block_cache_put(bs, s->refcount_block_cache, (void **) refcount_block);
}
return ret;
}
@@ -457,7 +458,7 @@ static int QEMU_WARN_UNUSED_RESULT
update_refcount(BlockDriverState *bs,
if (table_index != old_table_index) {
if (refcount_block) {
ret = block_cache_put(bs, s->refcount_block_cache,
- (void**) &refcount_block);
+ (void **) &refcount_block);
if (ret < 0) {
goto fail;
}
@@ -494,7 +495,7 @@ fail:
if (refcount_block) {
int wret;
wret = block_cache_put(bs, s->refcount_block_cache,
- (void**) &refcount_block);
+ (void **) &refcount_block);
if (wret < 0) {
return ret < 0 ? ret : wret;
}
@@ -768,7 +769,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
l2_offset &= L1E_OFFSET_MASK;
ret = block_cache_get(bs, s->l2_table_cache, l2_offset,
- (void**) &l2_table);
+ (void **) &l2_table);
if (ret < 0) {
goto fail;
}
@@ -815,12 +816,13 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
s->refcount_block_cache);
}
l2_table[j] = cpu_to_be64(offset);
- block_cache_entry_mark_dirty(s->l2_table_cache,
l2_table);
+ block_cache_entry_mark_dirty(s->l2_table_cache,
+ l2_table);
}
}
}
- ret = block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ ret = block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
if (ret < 0) {
goto fail;
}
@@ -847,7 +849,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
ret = bdrv_flush(bs);
fail:
if (l2_table) {
- block_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
+ block_cache_put(bs, s->l2_table_cache, (void **) &l2_table);
}
/* Update L1 only if it isn't deleted anyway (addend = -1) */
diff --git a/block/qcow2.c b/block/qcow2.c
index c3340ad..cec1c26 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -454,8 +454,11 @@ static int qcow2_open(BlockDriverState *bs, QDict
*options, int flags)
}
/* alloc L2 table/refcount block cache */
- s->l2_table_cache = block_cache_create(bs, L2_CACHE_SIZE);
- s->refcount_block_cache = block_cache_create(bs, REFCOUNT_CACHE_SIZE);
+ s->l2_table_cache = block_cache_create(bs, L2_CACHE_SIZE,
+ s->cluster_size, BLOCK_TABLE_L2);
+ s->refcount_block_cache = block_cache_create(bs, REFCOUNT_CACHE_SIZE,
+ s->cluster_size,
+ BLOCK_TABLE_REF);
s->cluster_cache = g_malloc(s->cluster_size);
/* one more sector for decompressed data alignment */
diff --git a/block/qcow2.h b/block/qcow2.h
index 6e63217..7494814 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -27,6 +27,7 @@
#include "qemu/aes.h"
#include "block/coroutine.h"
+#include "block/block-cache.h"
//#define DEBUG_ALLOC
//#define DEBUG_ALLOC2
@@ -97,9 +98,6 @@ typedef struct QCowSnapshot {
uint64_t vm_clock_nsec;
} QCowSnapshot;
-struct BlockCache;
-typedef struct BlockCache BlockCache;
-
typedef struct Qcow2UnknownHeaderExtension {
uint32_t magic;
uint32_t len;
@@ -149,8 +147,8 @@ typedef struct BDRVQcowState {
uint64_t l1_table_offset;
uint64_t *l1_table;
- BlockCache* l2_table_cache;
- BlockCache* refcount_block_cache;
+ BlockCache *l2_table_cache;
+ BlockCache *refcount_block_cache;
uint8_t *cluster_cache;
uint8_t *cluster_data;
@@ -392,20 +390,4 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs, const
char *snapshot_name);
void qcow2_free_snapshots(BlockDriverState *bs);
int qcow2_read_snapshots(BlockDriverState *bs);
-/* qcow2-cache.c functions */
-BlockCache *block_cache_create(BlockDriverState *bs, int num_tables);
-int block_cache_destroy(BlockDriverState* bs, BlockCache *c);
-
-void block_cache_entry_mark_dirty(BlockCache *c, void *table);
-int block_cache_flush(BlockDriverState *bs, BlockCache *c);
-int block_cache_set_dependency(BlockDriverState *bs, BlockCache *c,
- BlockCache *dependency);
-void block_cache_depends_on_flush(BlockCache *c);
-
-int block_cache_get(BlockDriverState *bs, BlockCache *c, uint64_t offset,
- void **table);
-int block_cache_get_empty(BlockDriverState *bs, BlockCache *c, uint64_t offset,
- void **table);
-int block_cache_put(BlockDriverState *bs, BlockCache *c, void **table);
-
#endif
diff --git a/include/block/block-cache.h b/include/block/block-cache.h
new file mode 100644
index 0000000..1992765
--- /dev/null
+++ b/include/block/block-cache.h
@@ -0,0 +1,55 @@
+/*
+ * QEMU Block Layer Cache
+ *
+ * This file is based on qcow2-cache.c, see its copyrights below:
+ *
+ * L2/refcount table cache for the QCOW2 format
+ *
+ * Copyright (c) 2010 Kevin Wolf <address@hidden>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef BLOCK_CACHE_H
+#define BLOCK_CACHE_H
+
+typedef enum {
+ BLOCK_TABLE_REF,
+ BLOCK_TABLE_L2,
+ BLOCK_TABLE_BITMAP,
+} BlockTableType;
+
+struct BlockCache;
+typedef struct BlockCache BlockCache;
+
+BlockCache *block_cache_create(BlockDriverState *bs, int num_tables,
+ size_t table_size, BlockTableType type);
+int block_cache_destroy(BlockDriverState *bs, BlockCache *c);
+int block_cache_flush(BlockDriverState *bs, BlockCache *c);
+int block_cache_set_dependency(BlockDriverState *bs,
+ BlockCache *c,
+ BlockCache *dependency);
+void block_cache_depends_on_flush(BlockCache *c);
+int block_cache_get(BlockDriverState *bs, BlockCache *c, uint64_t offset,
+ void **table);
+int block_cache_get_empty(BlockDriverState *bs, BlockCache *c,
+ uint64_t offset, void **table);
+int block_cache_put(BlockDriverState *bs, BlockCache *c, void **table);
+void block_cache_entry_mark_dirty(BlockCache *c, void *table);
+#endif /* BLOCK_CACHE_H */
diff --git a/trace-events b/trace-events
index b7edcc9..b701e01 100644
--- a/trace-events
+++ b/trace-events
@@ -503,6 +503,7 @@ qcow2_l2_allocate_write_l2(void *bs, int l1_index) "bs %p
l1_index %d"
qcow2_l2_allocate_write_l1(void *bs, int l1_index) "bs %p l1_index %d"
qcow2_l2_allocate_done(void *bs, int l1_index, int ret) "bs %p l1_index %d ret
%d"
+# block/block-cache.c
block_cache_get(void *co, int c, uint64_t offset, bool read_from_disk) "co %p
is_l2_cache %d offset %" PRIx64 " read_from_disk %d"
block_cache_get_replace_entry(void *co, int c, int i) "co %p is_l2_cache %d
index %d"
block_cache_get_read(void *co, int c, int i) "co %p is_l2_cache %d index %d"
--
1.7.11.7
- [Qemu-devel] [PATCH V19 0/8] add-cow file format, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 1/8] V18: docs: document for add-cow file format, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 2/8] make path_has_protocol non static, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 3/8] qed_read_string to bdrv_read_string, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 5/8] Make block-cache.c be common interface,
Dongxu Wang <=
- [Qemu-devel] [PATCH V19 4/8] rename qcow2-cache.c to block-cache.c, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 6/8] add debug event for add-cow, Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 7/8] add-cow file format core code., Dongxu Wang, 2013/05/30
- [Qemu-devel] [PATCH V19 8/8] qemu-iotests: add add-cow iotests support, Dongxu Wang, 2013/05/30