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[Qemu-devel] [PATCH v6 4/8] block: make bdrv_delete() static
|
From: |
Fam Zheng |
|
Subject: |
[Qemu-devel] [PATCH v6 4/8] block: make bdrv_delete() static |
|
Date: |
Fri, 23 Aug 2013 09:14:47 +0800 |
Manage BlockDriverState lifecycle with refcnt, so bdrv_delete() is no
longer public and should be called by bdrv_unref() if refcnt is
decreased to 0.
This is an identical change because effectively, there's no multiple
reference of BDS now: no caller of bdrv_ref() yet, only bdrv_new() sets
bs->refcnt to 1, so all bdrv_unref() now actually delete the BDS.
Signed-off-by: Fam Zheng <address@hidden>
---
block.c | 23 ++++++++++++-----------
block/backup.c | 2 +-
block/blkverify.c | 4 ++--
block/cow.c | 2 +-
block/iscsi.c | 2 +-
block/mirror.c | 2 +-
block/qcow.c | 2 +-
block/qcow2.c | 2 +-
block/qed.c | 2 +-
block/sheepdog.c | 6 +++---
block/snapshot.c | 2 +-
block/stream.c | 2 +-
block/vmdk.c | 10 +++++-----
block/vvfat.c | 4 ++--
blockdev.c | 14 +++++++-------
hw/block/xen_disk.c | 4 ++--
include/block/block.h | 1 -
qemu-img.c | 26 +++++++++++++-------------
qemu-io.c | 6 +++---
19 files changed, 58 insertions(+), 58 deletions(-)
diff --git a/block.c b/block.c
index fea6904..73e9abd 100644
--- a/block.c
+++ b/block.c
@@ -877,7 +877,7 @@ fail:
if (!bs->drv) {
QDECREF(bs->options);
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
@@ -928,7 +928,7 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict
*options)
*backing_filename ? backing_filename : NULL, options,
back_flags, back_drv);
if (ret < 0) {
- bdrv_delete(bs->backing_hd);
+ bdrv_unref(bs->backing_hd);
bs->backing_hd = NULL;
bs->open_flags |= BDRV_O_NO_BACKING;
return ret;
@@ -1003,12 +1003,12 @@ int bdrv_open(BlockDriverState *bs, const char
*filename, QDict *options,
bs1 = bdrv_new("");
ret = bdrv_open(bs1, filename, NULL, 0, drv);
if (ret < 0) {
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
goto fail;
}
total_size = bdrv_getlength(bs1) & BDRV_SECTOR_MASK;
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));
if (ret < 0) {
@@ -1082,7 +1082,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
}
if (bs->file != file) {
- bdrv_delete(file);
+ bdrv_unref(file);
file = NULL;
}
@@ -1122,7 +1122,7 @@ int bdrv_open(BlockDriverState *bs, const char *filename,
QDict *options,
unlink_and_fail:
if (file != NULL) {
- bdrv_delete(file);
+ bdrv_unref(file);
}
if (bs->is_temporary) {
unlink(filename);
@@ -1383,7 +1383,7 @@ void bdrv_close(BlockDriverState *bs)
if (bs->drv) {
if (bs->backing_hd) {
- bdrv_delete(bs->backing_hd);
+ bdrv_unref(bs->backing_hd);
bs->backing_hd = NULL;
}
bs->drv->bdrv_close(bs);
@@ -1407,7 +1407,7 @@ void bdrv_close(BlockDriverState *bs)
bs->options = NULL;
if (bs->file != NULL) {
- bdrv_delete(bs->file);
+ bdrv_unref(bs->file);
bs->file = NULL;
}
}
@@ -1604,11 +1604,12 @@ void bdrv_append(BlockDriverState *bs_new,
BlockDriverState *bs_top)
bs_new->drv ? bs_new->drv->format_name : "");
}
-void bdrv_delete(BlockDriverState *bs)
+static void bdrv_delete(BlockDriverState *bs)
{
assert(!bs->dev);
assert(!bs->job);
assert(!bs->in_use);
+ assert(!bs->refcnt);
/* remove from list, if necessary */
bdrv_make_anon(bs);
@@ -2124,7 +2125,7 @@ int bdrv_drop_intermediate(BlockDriverState *active,
BlockDriverState *top,
QSIMPLEQ_FOREACH_SAFE(intermediate_state, &states_to_delete, entry, next) {
/* so that bdrv_close() does not recursively close the chain */
intermediate_state->bs->backing_hd = NULL;
- bdrv_delete(intermediate_state->bs);
+ bdrv_unref(intermediate_state->bs);
}
ret = 0;
@@ -4625,7 +4626,7 @@ out:
free_option_parameters(param);
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
}
diff --git a/block/backup.c b/block/backup.c
index 6ae8a05..586d941 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -338,7 +338,7 @@ static void coroutine_fn backup_run(void *opaque)
hbitmap_free(job->bitmap);
bdrv_iostatus_disable(target);
- bdrv_delete(target);
+ bdrv_unref(target);
block_job_completed(&job->common, ret);
}
diff --git a/block/blkverify.c b/block/blkverify.c
index 1d58cc3..c4e961e 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -155,7 +155,7 @@ static int blkverify_open(BlockDriverState *bs, QDict
*options, int flags)
s->test_file = bdrv_new("");
ret = bdrv_open(s->test_file, filename, NULL, flags, NULL);
if (ret < 0) {
- bdrv_delete(s->test_file);
+ bdrv_unref(s->test_file);
s->test_file = NULL;
goto fail;
}
@@ -169,7 +169,7 @@ static void blkverify_close(BlockDriverState *bs)
{
BDRVBlkverifyState *s = bs->opaque;
- bdrv_delete(s->test_file);
+ bdrv_unref(s->test_file);
s->test_file = NULL;
}
diff --git a/block/cow.c b/block/cow.c
index 1cc2e89..767639c 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -314,7 +314,7 @@ static int cow_create(const char *filename,
QEMUOptionParameter *options)
}
exit:
- bdrv_delete(cow_bs);
+ bdrv_unref(cow_bs);
return ret;
}
diff --git a/block/iscsi.c b/block/iscsi.c
index 123f058..df3a52d 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1294,7 +1294,7 @@ out:
}
g_free(bs->opaque);
bs->opaque = NULL;
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/mirror.c b/block/mirror.c
index bed4a7e..6662f55 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -480,7 +480,7 @@ immediate_exit:
bdrv_swap(s->target, s->common.bs);
}
bdrv_close(s->target);
- bdrv_delete(s->target);
+ bdrv_unref(s->target);
block_job_completed(&s->common, ret);
}
diff --git a/block/qcow.c b/block/qcow.c
index 5239bd6..6b891ac 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -751,7 +751,7 @@ static int qcow_create(const char *filename,
QEMUOptionParameter *options)
g_free(tmp);
ret = 0;
exit:
- bdrv_delete(qcow_bs);
+ bdrv_unref(qcow_bs);
return ret;
}
diff --git a/block/qcow2.c b/block/qcow2.c
index 3376901..c236505 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1390,7 +1390,7 @@ static int qcow2_create2(const char *filename, int64_t
total_size,
ret = 0;
out:
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/qed.c b/block/qed.c
index f767b05..0e1b767 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -599,7 +599,7 @@ static int qed_create(const char *filename, uint32_t
cluster_size,
ret = 0; /* success */
out:
g_free(l1_table);
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
diff --git a/block/sheepdog.c b/block/sheepdog.c
index afe0533..9aebeb6 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1447,7 +1447,7 @@ static int sd_prealloc(const char *filename)
}
out:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
g_free(buf);
@@ -1526,13 +1526,13 @@ static int sd_create(const char *filename,
QEMUOptionParameter *options)
if (!is_snapshot(&s->inode)) {
error_report("cannot clone from a non snapshot vdi");
- bdrv_delete(bs);
+ bdrv_unref(bs);
ret = -EINVAL;
goto out;
}
base_vid = s->inode.vdi_id;
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
ret = do_sd_create(s, vdi, vdi_size, base_vid, &vid, 0);
diff --git a/block/snapshot.c b/block/snapshot.c
index 6c6d9de..8f61cc0 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -99,7 +99,7 @@ int bdrv_snapshot_goto(BlockDriverState *bs,
ret = bdrv_snapshot_goto(bs->file, snapshot_id);
open_ret = drv->bdrv_open(bs, NULL, bs->open_flags);
if (open_ret < 0) {
- bdrv_delete(bs->file);
+ bdrv_unref(bs->file);
bs->drv = NULL;
return open_ret;
}
diff --git a/block/stream.c b/block/stream.c
index 7fe9e48..97cc14b 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -68,7 +68,7 @@ static void close_unused_images(BlockDriverState *top,
BlockDriverState *base,
unused = intermediate;
intermediate = intermediate->backing_hd;
unused->backing_hd = NULL;
- bdrv_delete(unused);
+ bdrv_unref(unused);
}
top->backing_hd = base;
}
diff --git a/block/vmdk.c b/block/vmdk.c
index 346bb5c..fa3bd1c 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -216,7 +216,7 @@ static void vmdk_free_extents(BlockDriverState *bs)
g_free(e->l2_cache);
g_free(e->l1_backup_table);
if (e->file != bs->file) {
- bdrv_delete(e->file);
+ bdrv_unref(e->file);
}
}
g_free(s->extents);
@@ -745,7 +745,7 @@ static int vmdk_parse_extents(const char *desc,
BlockDriverState *bs,
/* SPARSE extent */
ret = vmdk_open_sparse(bs, extent_file, bs->open_flags);
if (ret) {
- bdrv_delete(extent_file);
+ bdrv_unref(extent_file);
return ret;
}
} else {
@@ -1634,15 +1634,15 @@ static int vmdk_create(const char *filename,
QEMUOptionParameter *options)
BlockDriverState *bs = bdrv_new("");
ret = bdrv_open(bs, backing_file, NULL, 0, NULL);
if (ret != 0) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
if (strcmp(bs->drv->format_name, "vmdk")) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
return -EINVAL;
}
parent_cid = vmdk_read_cid(bs, 0);
- bdrv_delete(bs);
+ bdrv_unref(bs);
snprintf(parent_desc_line, sizeof(parent_desc_line),
"parentFileNameHint=\"%s\"", backing_file);
}
diff --git a/block/vvfat.c b/block/vvfat.c
index a827d91..2178a13 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2894,7 +2894,7 @@ static int write_target_commit(BlockDriverState *bs,
int64_t sector_num,
static void write_target_close(BlockDriverState *bs) {
BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque);
- bdrv_delete(s->qcow);
+ bdrv_unref(s->qcow);
g_free(s->qcow_filename);
}
@@ -2935,7 +2935,7 @@ static int enable_write_target(BDRVVVFATState *s)
ret = bdrv_open(s->qcow, s->qcow_filename, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, bdrv_qcow);
if (ret < 0) {
- bdrv_delete(s->qcow);
+ bdrv_unref(s->qcow);
goto err;
}
diff --git a/blockdev.c b/blockdev.c
index 41b0a49..5b86c9d 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -213,7 +213,7 @@ static void bdrv_format_print(void *opaque, const char
*name)
static void drive_uninit(DriveInfo *dinfo)
{
qemu_opts_del(dinfo->opts);
- bdrv_delete(dinfo->bdrv);
+ bdrv_unref(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
g_free(dinfo->serial);
@@ -724,7 +724,7 @@ static DriveInfo *blockdev_init(QemuOpts *all_opts,
err:
qemu_opts_del(opts);
QDECREF(bs_opts);
- bdrv_delete(dinfo->bdrv);
+ bdrv_unref(dinfo->bdrv);
g_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
g_free(dinfo);
@@ -994,7 +994,7 @@ static void external_snapshot_abort(BlkTransactionState
*common)
ExternalSnapshotState *state =
DO_UPCAST(ExternalSnapshotState, common, common);
if (state->new_bs) {
- bdrv_delete(state->new_bs);
+ bdrv_unref(state->new_bs);
}
}
@@ -1597,7 +1597,7 @@ void qmp_drive_backup(const char *device, const char
*target,
target_bs = bdrv_new("");
ret = bdrv_open(target_bs, target, NULL, flags, drv);
if (ret < 0) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_setg_file_open(errp, -ret, target);
return;
}
@@ -1605,7 +1605,7 @@ void qmp_drive_backup(const char *device, const char
*target,
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_propagate(errp, local_err);
return;
}
@@ -1737,7 +1737,7 @@ void qmp_drive_mirror(const char *device, const char
*target,
target_bs = bdrv_new("");
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
if (ret < 0) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_setg_file_open(errp, -ret, target);
return;
}
@@ -1746,7 +1746,7 @@ void qmp_drive_mirror(const char *device, const char
*target,
on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
- bdrv_delete(target_bs);
+ bdrv_unref(target_bs);
error_propagate(errp, local_err);
return;
}
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 727f433..8bfa04e 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -813,7 +813,7 @@ static int blk_connect(struct XenDevice *xendev)
readonly);
if (bdrv_open(blkdev->bs,
blkdev->filename, NULL, qflags, drv) != 0) {
- bdrv_delete(blkdev->bs);
+ bdrv_unref(blkdev->bs);
blkdev->bs = NULL;
}
}
@@ -926,7 +926,7 @@ static void blk_disconnect(struct XenDevice *xendev)
/* close/delete only if we created it ourself */
bdrv_close(blkdev->bs);
bdrv_detach_dev(blkdev->bs, blkdev);
- bdrv_delete(blkdev->bs);
+ bdrv_unref(blkdev->bs);
}
blkdev->bs = NULL;
}
diff --git a/include/block/block.h b/include/block/block.h
index b33ef62..1929355 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -123,7 +123,6 @@ BlockDriverState *bdrv_new(const char *device_name);
void bdrv_make_anon(BlockDriverState *bs);
void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
-void bdrv_delete(BlockDriverState *bs);
int bdrv_parse_cache_flags(const char *mode, int *flags);
int bdrv_parse_discard_flags(const char *mode, int *flags);
int bdrv_file_open(BlockDriverState **pbs, const char *filename,
diff --git a/qemu-img.c b/qemu-img.c
index b9a848d..3eaf1f1 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -298,7 +298,7 @@ static BlockDriverState *bdrv_new_open(const char *filename,
return bs;
fail:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
return NULL;
}
@@ -652,7 +652,7 @@ static int img_check(int argc, char **argv)
fail:
qapi_free_ImageCheck(check);
- bdrv_delete(bs);
+ bdrv_unref(bs);
return ret;
}
@@ -722,7 +722,7 @@ static int img_commit(int argc, char **argv)
break;
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -1104,11 +1104,11 @@ static int img_compare(int argc, char **argv)
ret = 0;
out:
- bdrv_delete(bs2);
+ bdrv_unref(bs2);
qemu_vfree(buf1);
qemu_vfree(buf2);
out2:
- bdrv_delete(bs1);
+ bdrv_unref(bs1);
out3:
qemu_progress_end();
return ret;
@@ -1538,12 +1538,12 @@ out:
free_option_parameters(param);
qemu_vfree(buf);
if (out_bs) {
- bdrv_delete(out_bs);
+ bdrv_unref(out_bs);
}
if (bs) {
for (bs_i = 0; bs_i < bs_n; bs_i++) {
if (bs[bs_i]) {
- bdrv_delete(bs[bs_i]);
+ bdrv_unref(bs[bs_i]);
}
}
g_free(bs);
@@ -1681,7 +1681,7 @@ static ImageInfoList *collect_image_info_list(const char
*filename,
*last = elem;
last = &elem->next;
- bdrv_delete(bs);
+ bdrv_unref(bs);
filename = fmt = NULL;
if (chain) {
@@ -1895,7 +1895,7 @@ static int img_snapshot(int argc, char **argv)
}
/* Cleanup */
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -2170,14 +2170,14 @@ out:
/* Cleanup */
if (!unsafe) {
if (bs_old_backing != NULL) {
- bdrv_delete(bs_old_backing);
+ bdrv_unref(bs_old_backing);
}
if (bs_new_backing != NULL) {
- bdrv_delete(bs_new_backing);
+ bdrv_unref(bs_new_backing);
}
}
- bdrv_delete(bs);
+ bdrv_unref(bs);
if (ret) {
return 1;
}
@@ -2300,7 +2300,7 @@ static int img_resize(int argc, char **argv)
}
out:
if (bs) {
- bdrv_delete(bs);
+ bdrv_unref(bs);
}
if (ret) {
return 1;
diff --git a/qemu-io.c b/qemu-io.c
index d54dc86..71f4ff1 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -32,7 +32,7 @@ static char **cmdline;
static int close_f(BlockDriverState *bs, int argc, char **argv)
{
- bdrv_delete(bs);
+ bdrv_unref(bs);
qemuio_bs = NULL;
return 0;
}
@@ -61,7 +61,7 @@ static int openfile(char *name, int flags, int growable)
if (bdrv_open(qemuio_bs, name, NULL, flags, NULL) < 0) {
fprintf(stderr, "%s: can't open device %s\n", progname, name);
- bdrv_delete(qemuio_bs);
+ bdrv_unref(qemuio_bs);
qemuio_bs = NULL;
return 1;
}
@@ -422,7 +422,7 @@ int main(int argc, char **argv)
bdrv_drain_all();
if (qemuio_bs) {
- bdrv_delete(qemuio_bs);
+ bdrv_unref(qemuio_bs);
}
return 0;
}
--
1.8.3.1
- [Qemu-devel] [PATCH v6 0/8] Implement reference count for BlockDriverState, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 2/8] iscsi: use bdrv_new() instead of stack structure, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 3/8] block: implement reference count for BlockDriverState, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 4/8] block: make bdrv_delete() static,
Fam Zheng <=
- [Qemu-devel] [PATCH v6 5/8] migration: omit drive ref as we have bdrv_ref now, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 6/8] xen_disk: simplify blk_disconnect with refcnt, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 7/8] nbd: use BlockDriverState refcnt, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 8/8] block: use BDS ref for block jobs, Fam Zheng, 2013/08/22
- [Qemu-devel] [PATCH v6 1/8] vvfat: use bdrv_new() to allocate BlockDriverState, Fam Zheng, 2013/08/22