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block: bdrv/blk_co_unref() for calls in coroutine context

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These functions must not be called in coroutine context, because they
need write access to the graph.

Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230504115750.54437-4-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-05-04 13:57:33 +02:00
parent da4afaff07
commit b2ab5f545f
12 changed files with 44 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block.c
View File

@ -680,7 +680,7 @@ int coroutine_fn bdrv_co_create_opts_simple(BlockDriver *drv,
ret = 0; ret = 0;
out: out:
blk_unref(blk); blk_co_unref(blk);
return ret; return ret;
} }

6
block/crypto.c
View File

@ -355,7 +355,7 @@ block_crypto_co_create_generic(BlockDriverState *bs, int64_t size,
ret = 0; ret = 0;
cleanup: cleanup:
qcrypto_block_free(crypto); qcrypto_block_free(crypto);
blk_unref(blk); blk_co_unref(blk);
return ret; return ret;
} }
@ -661,7 +661,7 @@ block_crypto_co_create_luks(BlockdevCreateOptions *create_options, Error **errp)
ret = 0; ret = 0;
fail: fail:
bdrv_unref(bs); bdrv_co_unref(bs);
return ret; return ret;
} }
@ -730,7 +730,7 @@ fail:
bdrv_co_delete_file_noerr(bs); bdrv_co_delete_file_noerr(bs);
} }
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_QCryptoBlockCreateOptions(create_opts); qapi_free_QCryptoBlockCreateOptions(create_opts);
qobject_unref(cryptoopts); qobject_unref(cryptoopts);
return ret; return ret;

6
block/parallels.c
View File

@ -613,8 +613,8 @@ static int coroutine_fn parallels_co_create(BlockdevCreateOptions* opts,
ret = 0; ret = 0;
out: out:
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs); bdrv_co_unref(bs);
return ret; return ret;
exit: exit:
@ -691,7 +691,7 @@ parallels_co_create_opts(BlockDriver *drv, const char *filename,
done: done:
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

6
block/qcow.c
View File

@ -915,8 +915,8 @@ static int coroutine_fn qcow_co_create(BlockdevCreateOptions *opts,
g_free(tmp); g_free(tmp);
ret = 0; ret = 0;
exit: exit:
blk_unref(qcow_blk); blk_co_unref(qcow_blk);
bdrv_unref(bs); bdrv_co_unref(bs);
qcrypto_block_free(crypto); qcrypto_block_free(crypto);
return ret; return ret;
} }
@ -1015,7 +1015,7 @@ qcow_co_create_opts(BlockDriver *drv, const char *filename,
fail: fail:
g_free(backing_fmt); g_free(backing_fmt);
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

14
block/qcow2.c
View File

@ -3705,7 +3705,7 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
goto out; goto out;
} }
blk_unref(blk); blk_co_unref(blk);
blk = NULL; blk = NULL;
/* /*
@ -3785,7 +3785,7 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
} }
} }
blk_unref(blk); blk_co_unref(blk);
blk = NULL; blk = NULL;
/* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning. /* Reopen the image without BDRV_O_NO_FLUSH to flush it before returning.
@ -3810,9 +3810,9 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
ret = 0; ret = 0;
out: out:
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs); bdrv_co_unref(bs);
bdrv_unref(data_bs); bdrv_co_unref(data_bs);
return ret; return ret;
} }
@ -3943,8 +3943,8 @@ finish:
} }
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
bdrv_unref(data_bs); bdrv_co_unref(data_bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

6
block/qed.c
View File

@ -748,8 +748,8 @@ static int coroutine_fn bdrv_qed_co_create(BlockdevCreateOptions *opts,
ret = 0; /* success */ ret = 0; /* success */
out: out:
g_free(l1_table); g_free(l1_table);
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs); bdrv_co_unref(bs);
return ret; return ret;
} }
@ -819,7 +819,7 @@ bdrv_qed_co_create_opts(BlockDriver *drv, const char *filename,
fail: fail:
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

6
block/vdi.c
View File

@ -886,8 +886,8 @@ static int coroutine_fn vdi_co_do_create(BlockdevCreateOptions *create_options,
ret = 0; ret = 0;
exit: exit:
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs_file); bdrv_co_unref(bs_file);
g_free(bmap); g_free(bmap);
return ret; return ret;
} }
@ -975,7 +975,7 @@ vdi_co_create_opts(BlockDriver *drv, const char *filename,
done: done:
qobject_unref(qdict); qobject_unref(qdict);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
bdrv_unref(bs_file); bdrv_co_unref(bs_file);
return ret; return ret;
} }

6
block/vhdx.c
View File

@ -2053,8 +2053,8 @@ static int coroutine_fn vhdx_co_create(BlockdevCreateOptions *opts,
ret = 0; ret = 0;
delete_and_exit: delete_and_exit:
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs); bdrv_co_unref(bs);
g_free(creator); g_free(creator);
return ret; return ret;
} }
@ -2144,7 +2144,7 @@ vhdx_co_create_opts(BlockDriver *drv, const char *filename,
fail: fail:
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

18
block/vmdk.c
View File

@ -2306,7 +2306,7 @@ exit:
if (pbb) { if (pbb) {
*pbb = blk; *pbb = blk;
} else { } else {
blk_unref(blk); blk_co_unref(blk);
blk = NULL; blk = NULL;
} }
} }
@ -2516,12 +2516,12 @@ vmdk_co_do_create(int64_t size,
if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) {
error_setg(errp, "Invalid backing file format: %s. Must be vmdk", error_setg(errp, "Invalid backing file format: %s. Must be vmdk",
blk_bs(backing)->drv->format_name); blk_bs(backing)->drv->format_name);
blk_unref(backing); blk_co_unref(backing);
ret = -EINVAL; ret = -EINVAL;
goto exit; goto exit;
} }
ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid);
blk_unref(backing); blk_co_unref(backing);
if (ret) { if (ret) {
error_setg(errp, "Failed to read parent CID"); error_setg(errp, "Failed to read parent CID");
goto exit; goto exit;
@ -2542,14 +2542,14 @@ vmdk_co_do_create(int64_t size,
blk_bs(extent_blk)->filename); blk_bs(extent_blk)->filename);
created_size += cur_size; created_size += cur_size;
extent_idx++; extent_idx++;
blk_unref(extent_blk); blk_co_unref(extent_blk);
} }
/* Check whether we got excess extents */ /* Check whether we got excess extents */
extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain,
opaque, NULL); opaque, NULL);
if (extent_blk) { if (extent_blk) {
blk_unref(extent_blk); blk_co_unref(extent_blk);
error_setg(errp, "List of extents contains unused extents"); error_setg(errp, "List of extents contains unused extents");
ret = -EINVAL; ret = -EINVAL;
goto exit; goto exit;
@ -2590,7 +2590,7 @@ vmdk_co_do_create(int64_t size,
ret = 0; ret = 0;
exit: exit:
if (blk) { if (blk) {
blk_unref(blk); blk_co_unref(blk);
} }
g_free(desc); g_free(desc);
g_free(parent_desc_line); g_free(parent_desc_line);
@ -2641,7 +2641,7 @@ vmdk_co_create_opts_cb(int64_t size, int idx, bool flat, bool split,
errp)) { errp)) {
goto exit; goto exit;
} }
bdrv_unref(bs); bdrv_co_unref(bs);
exit: exit:
g_free(ext_filename); g_free(ext_filename);
return blk; return blk;
@ -2797,12 +2797,12 @@ static BlockBackend * coroutine_fn vmdk_co_create_cb(int64_t size, int idx,
return NULL; return NULL;
} }
blk_set_allow_write_beyond_eof(blk, true); blk_set_allow_write_beyond_eof(blk, true);
bdrv_unref(bs); bdrv_co_unref(bs);
if (size != -1) { if (size != -1) {
ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp);
if (ret) { if (ret) {
blk_unref(blk); blk_co_unref(blk);
blk = NULL; blk = NULL;
} }
} }

6
block/vpc.c
View File

@ -1082,8 +1082,8 @@ static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts,
} }
out: out:
blk_unref(blk); blk_co_unref(blk);
bdrv_unref(bs); bdrv_co_unref(bs);
return ret; return ret;
} }
@ -1162,7 +1162,7 @@ vpc_co_create_opts(BlockDriver *drv, const char *filename,
fail: fail:
qobject_unref(qdict); qobject_unref(qdict);
bdrv_unref(bs); bdrv_co_unref(bs);
qapi_free_BlockdevCreateOptions(create_options); qapi_free_BlockdevCreateOptions(create_options);
return ret; return ret;
} }

3
include/block/block-global-state.h
View File

@ -218,7 +218,8 @@ void bdrv_img_create(const char *filename, const char *fmt,
bool quiet, Error **errp); bool quiet, Error **errp);
void bdrv_ref(BlockDriverState *bs); void bdrv_ref(BlockDriverState *bs);
void bdrv_unref(BlockDriverState *bs); void no_coroutine_fn bdrv_unref(BlockDriverState *bs);
void coroutine_fn no_co_wrapper bdrv_co_unref(BlockDriverState *bs);
void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child); void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child);
BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
BlockDriverState *child_bs, BlockDriverState *child_bs,

5
include/sysemu/block-backend-global-state.h
View File

@ -42,7 +42,10 @@ blk_co_new_open(const char *filename, const char *reference, QDict *options,
int blk_get_refcnt(BlockBackend *blk); int blk_get_refcnt(BlockBackend *blk);
void blk_ref(BlockBackend *blk); void blk_ref(BlockBackend *blk);
void blk_unref(BlockBackend *blk);
void no_coroutine_fn blk_unref(BlockBackend *blk);
void coroutine_fn no_co_wrapper blk_co_unref(BlockBackend *blk);
void blk_remove_all_bs(void); void blk_remove_all_bs(void);
BlockBackend *blk_by_name(const char *name); BlockBackend *blk_by_name(const char *name);
BlockBackend *blk_next(BlockBackend *blk); BlockBackend *blk_next(BlockBackend *blk);