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block/qcow2-refcount: add trace-point to qcow2_process_discards 

Let's at least trace ignored failure.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2019-04-23 15:57:04 +03:00 committed by Kevin Wolf
parent 42a65f02f9
commit 1477b6c803
2 changed files with 9 additions and 1 deletions
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7
block/qcow2-refcount.c
View File

@ -29,6 +29,7 @@
#include "qemu/range.h"
#include "qemu/bswap.h"
#include "qemu/cutils.h"
#include "trace.h"
static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size,
uint64_t max);
@ -737,7 +738,11 @@ void qcow2_process_discards(BlockDriverState *bs, int ret)
/* Discard is optional, ignore the return value */
if (ret >= 0) {
bdrv_pdiscard(bs->file, d->offset, d->bytes);
int r2 = bdrv_pdiscard(bs->file, d->offset, d->bytes);
if (r2 < 0) {
trace_qcow2_process_discards_failed_region(d->offset, d->bytes,
r2);
}
}
g_free(d);

3
block/trace-events
View File

@ -92,6 +92,9 @@ qcow2_cache_get_done(void *co, int c, int i) "co %p is_l2_cache %d index %d"
qcow2_cache_flush(void *co, int c) "co %p is_l2_cache %d"
qcow2_cache_entry_flush(void *co, int c, int i) "co %p is_l2_cache %d index %d"
# qcow2-refcount.c
qcow2_process_discards_failed_region(uint64_t offset, uint64_t bytes, int ret) "offset 0x%" PRIx64 " bytes 0x%" PRIx64 " ret %d"
# qed-l2-cache.c
qed_alloc_l2_cache_entry(void *l2_cache, void *entry) "l2_cache %p entry %p"
qed_unref_l2_cache_entry(void *entry, int ref) "entry %p ref %d"