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qcow2: Add some tracing

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Kevin Wolf 2012-03-01 18:36:21 +01:00
parent 14fe292d86
commit 3cce16f44d
4 changed files with 65 additions and 1 deletions
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15
block/qcow2-cluster.c
View file

@ -27,6 +27,7 @@
#include "qemu-common.h"
#include "block_int.h"
#include "block/qcow2.h"
#include "trace.h"
int qcow2_grow_l1_table(BlockDriverState *bs, int min_size, bool exact_size)
{
@ -170,6 +171,8 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
old_l2_offset = s->l1_table[l1_index];
trace_qcow2_l2_allocate(bs, l1_index);
/* allocate a new l2 entry */
l2_offset = qcow2_alloc_clusters(bs, s->l2_size * sizeof(uint64_t));
@ -184,6 +187,7 @@ 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 = qcow2_cache_get_empty(bs, s->l2_table_cache, l2_offset, (void**) table);
if (ret < 0) {
return ret;
@ -216,6 +220,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
/* write the l2 table to the file */
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_WRITE);
trace_qcow2_l2_allocate_write_l2(bs, l1_index);
qcow2_cache_entry_mark_dirty(s->l2_table_cache, l2_table);
ret = qcow2_cache_flush(bs, s->l2_table_cache);
if (ret < 0) {
@ -223,6 +228,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
}
/* update the L1 entry */
trace_qcow2_l2_allocate_write_l1(bs, l1_index);
s->l1_table[l1_index] = l2_offset | QCOW_OFLAG_COPIED;
ret = write_l1_entry(bs, l1_index);
if (ret < 0) {
@ -230,9 +236,11 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
}
*table = l2_table;
trace_qcow2_l2_allocate_done(bs, l1_index, 0);
return 0;
fail:
trace_qcow2_l2_allocate_done(bs, l1_index, ret);
qcow2_cache_put(bs, s->l2_table_cache, (void**) table);
s->l1_table[l1_index] = old_l2_offset;
return ret;
@ -584,6 +592,8 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
uint64_t cluster_offset = m->cluster_offset;
bool cow = false;
trace_qcow2_cluster_link_l2(qemu_coroutine_self(), m->nb_clusters);
if (m->nb_clusters == 0)
return 0;
@ -695,6 +705,9 @@ int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
unsigned int nb_clusters, i = 0;
QCowL2Meta *old_alloc;
trace_qcow2_alloc_clusters_offset(qemu_coroutine_self(), offset,
n_start, n_end);
ret = get_cluster_table(bs, offset, &l2_table, &l2_offset, &l2_index);
if (ret < 0) {
return ret;
@ -793,7 +806,7 @@ again:
QLIST_INSERT_HEAD(&s->cluster_allocs, m, next_in_flight);
/* allocate a new cluster */
trace_qcow2_cluster_alloc_phys(qemu_coroutine_self());
cluster_offset = qcow2_alloc_clusters(bs, nb_clusters * s->cluster_size);
if (cluster_offset < 0) {
ret = cluster_offset;