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[PATCH v6 10/11] nbd: introduce ERRP_AUTO_PROPAGATE
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[PATCH v6 10/11] nbd: introduce ERRP_AUTO_PROPAGATE |
Date: |
Fri, 10 Jan 2020 22:41:57 +0300 |
If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro.
Otherwise, this info will not be added when errp == &error_fatal
(the program will exit prior to the error_append_hint() or
error_prepend() call). Fix such cases.
If we want to check error after errp-function call, we need to
introduce local_err and then propagate it to errp. Instead, use
ERRP_AUTO_PROPAGATE macro, benefits are:
1. No need of explicit error_propagate call
2. No need of explicit local_err variable: use errp directly
3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or
&error_fatal, this means that we don't break error_abort
(we'll abort on error_set, not on error_propagate)
This commit is generated by command
sed -n '/^Network Block Device (NBD)$/,/^$/{s/^F: //p}' \
MAINTAINERS | \
xargs git ls-files | grep '\.[hc]$' | \
xargs spatch \
--sp-file scripts/coccinelle/auto-propagated-errp.cocci \
--macro-file scripts/cocci-macro-file.h \
--in-place --no-show-diff --max-width 80
Reported-by: Kevin Wolf <address@hidden>
Reported-by: Greg Kurz <address@hidden>
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
include/block/nbd.h | 1 +
block/nbd.c | 49 +++++++++++++++++++++------------------------
nbd/client.c | 5 +++++
nbd/server.c | 5 +++++
4 files changed, 34 insertions(+), 26 deletions(-)
diff --git a/include/block/nbd.h b/include/block/nbd.h
index 7f46932d80..4ab8d917ed 100644
--- a/include/block/nbd.h
+++ b/include/block/nbd.h
@@ -360,6 +360,7 @@ void nbd_server_start(SocketAddress *addr, const char
*tls_creds,
static inline int nbd_read(QIOChannel *ioc, void *buffer, size_t size,
const char *desc, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
int ret = qio_channel_read_all(ioc, buffer, size, errp) < 0 ? -EIO : 0;
if (ret < 0) {
diff --git a/block/nbd.c b/block/nbd.c
index d085554f21..9701ccf887 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -990,10 +990,10 @@ static int nbd_co_receive_cmdread_reply(BDRVNBDState *s,
uint64_t handle,
uint64_t offset, QEMUIOVector *qiov,
int *request_ret, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
NBDReplyChunkIter iter;
NBDReply reply;
void *payload = NULL;
- Error *local_err = NULL;
NBD_FOREACH_REPLY_CHUNK(s, iter, handle, s->info.structured_reply,
qiov, &reply, &payload)
@@ -1012,20 +1012,20 @@ static int nbd_co_receive_cmdread_reply(BDRVNBDState
*s, uint64_t handle,
break;
case NBD_REPLY_TYPE_OFFSET_HOLE:
ret = nbd_parse_offset_hole_payload(s, &reply.structured, payload,
- offset, qiov, &local_err);
+ offset, qiov, errp);
if (ret < 0) {
nbd_channel_error(s, ret);
- nbd_iter_channel_error(&iter, ret, &local_err);
+ nbd_iter_channel_error(&iter, ret, errp);
}
break;
default:
if (!nbd_reply_type_is_error(chunk->type)) {
/* not allowed reply type */
nbd_channel_error(s, -EINVAL);
- error_setg(&local_err,
+ error_setg(errp,
"Unexpected reply type: %d (%s) for CMD_READ",
chunk->type, nbd_reply_type_lookup(chunk->type));
- nbd_iter_channel_error(&iter, -EINVAL, &local_err);
+ nbd_iter_channel_error(&iter, -EINVAL, errp);
}
}
@@ -1043,10 +1043,10 @@ static int
nbd_co_receive_blockstatus_reply(BDRVNBDState *s,
NBDExtent *extent,
int *request_ret, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
NBDReplyChunkIter iter;
NBDReply reply;
void *payload = NULL;
- Error *local_err = NULL;
bool received = false;
assert(!extent->length);
@@ -1060,27 +1060,27 @@ static int
nbd_co_receive_blockstatus_reply(BDRVNBDState *s,
case NBD_REPLY_TYPE_BLOCK_STATUS:
if (received) {
nbd_channel_error(s, -EINVAL);
- error_setg(&local_err, "Several BLOCK_STATUS chunks in reply");
- nbd_iter_channel_error(&iter, -EINVAL, &local_err);
+ error_setg(errp, "Several BLOCK_STATUS chunks in reply");
+ nbd_iter_channel_error(&iter, -EINVAL, errp);
}
received = true;
ret = nbd_parse_blockstatus_payload(s, &reply.structured,
payload, length, extent,
- &local_err);
+ errp);
if (ret < 0) {
nbd_channel_error(s, ret);
- nbd_iter_channel_error(&iter, ret, &local_err);
+ nbd_iter_channel_error(&iter, ret, errp);
}
break;
default:
if (!nbd_reply_type_is_error(chunk->type)) {
nbd_channel_error(s, -EINVAL);
- error_setg(&local_err,
+ error_setg(errp,
"Unexpected reply type: %d (%s) "
"for CMD_BLOCK_STATUS",
chunk->type, nbd_reply_type_lookup(chunk->type));
- nbd_iter_channel_error(&iter, -EINVAL, &local_err);
+ nbd_iter_channel_error(&iter, -EINVAL, errp);
}
}
@@ -1089,8 +1089,8 @@ static int nbd_co_receive_blockstatus_reply(BDRVNBDState
*s,
}
if (!extent->length && !iter.request_ret) {
- error_setg(&local_err, "Server did not reply with any status extents");
- nbd_iter_channel_error(&iter, -EIO, &local_err);
+ error_setg(errp, "Server did not reply with any status extents");
+ nbd_iter_channel_error(&iter, -EIO, errp);
}
error_propagate(errp, iter.err);
@@ -1385,16 +1385,15 @@ static void nbd_client_close(BlockDriverState *bs)
static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
QIOChannelSocket *sioc;
- Error *local_err = NULL;
sioc = qio_channel_socket_new();
qio_channel_set_name(QIO_CHANNEL(sioc), "nbd-client");
- qio_channel_socket_connect_sync(sioc, saddr, &local_err);
- if (local_err) {
+ qio_channel_socket_connect_sync(sioc, saddr, errp);
+ if (*errp) {
object_unref(OBJECT(sioc));
- error_propagate(errp, local_err);
return NULL;
}
@@ -1698,10 +1697,10 @@ static bool nbd_process_legacy_socket_options(QDict
*output_options,
static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
SocketAddress *saddr = NULL;
QDict *addr = NULL;
Visitor *iv = NULL;
- Error *local_err = NULL;
qdict_extract_subqdict(options, &addr, "server.");
if (!qdict_size(addr)) {
@@ -1714,9 +1713,8 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict
*options,
goto done;
}
- visit_type_SocketAddress(iv, NULL, &saddr, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ visit_type_SocketAddress(iv, NULL, &saddr, errp);
+ if (*errp) {
goto done;
}
@@ -1809,15 +1807,14 @@ static QemuOptsList nbd_runtime_opts = {
static int nbd_process_options(BlockDriverState *bs, QDict *options,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
BDRVNBDState *s = bs->opaque;
QemuOpts *opts;
- Error *local_err = NULL;
int ret = -EINVAL;
opts = qemu_opts_create(&nbd_runtime_opts, NULL, 0, &error_abort);
- qemu_opts_absorb_qdict(opts, options, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ qemu_opts_absorb_qdict(opts, options, errp);
+ if (*errp) {
goto error;
}
diff --git a/nbd/client.c b/nbd/client.c
index ba173108ba..e258ef3f7e 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -68,6 +68,7 @@ static int nbd_send_option_request(QIOChannel *ioc, uint32_t
opt,
uint32_t len, const char *data,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
NBDOption req;
QEMU_BUILD_BUG_ON(sizeof(req) != 16);
@@ -153,6 +154,7 @@ static int nbd_receive_option_reply(QIOChannel *ioc,
uint32_t opt,
static int nbd_handle_reply_err(QIOChannel *ioc, NBDOptionReply *reply,
bool strict, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
g_autofree char *msg = NULL;
if (!(reply->type & (1 << 31))) {
@@ -337,6 +339,7 @@ static int nbd_receive_list(QIOChannel *ioc, char **name,
char **description,
static int nbd_opt_info_or_go(QIOChannel *ioc, uint32_t opt,
NBDExportInfo *info, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
NBDOptionReply reply;
uint32_t len = strlen(info->name);
uint16_t type;
@@ -882,6 +885,7 @@ static int nbd_start_negotiate(AioContext *aio_context,
QIOChannel *ioc,
bool structured_reply, bool *zeroes,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
uint64_t magic;
trace_nbd_start_negotiate(tlscreds, hostname ? hostname : "<null>");
@@ -1017,6 +1021,7 @@ int nbd_receive_negotiate(AioContext *aio_context,
QIOChannel *ioc,
const char *hostname, QIOChannel **outioc,
NBDExportInfo *info, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
int result;
bool zeroes;
bool base_allocation = info->base_allocation;
diff --git a/nbd/server.c b/nbd/server.c
index 24ebc1a805..19de61a23e 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -211,6 +211,7 @@ static int GCC_FMT_ATTR(4, 0)
nbd_negotiate_send_rep_verr(NBDClient *client, uint32_t type,
Error **errp, const char *fmt, va_list va)
{
+ ERRP_AUTO_PROPAGATE();
g_autofree char *msg = NULL;
int ret;
size_t len;
@@ -369,6 +370,7 @@ static int nbd_opt_read_name(NBDClient *client, char
**name, uint32_t *length,
static int nbd_negotiate_send_rep_list(NBDClient *client, NBDExport *exp,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
size_t name_len, desc_len;
uint32_t len;
const char *name = exp->name ? exp->name : "";
@@ -432,6 +434,7 @@ static void nbd_check_meta_export(NBDClient *client)
static int nbd_negotiate_handle_export_name(NBDClient *client, bool no_zeroes,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
g_autofree char *name = NULL;
char buf[NBD_REPLY_EXPORT_NAME_SIZE] = "";
size_t len;
@@ -1272,6 +1275,7 @@ static int nbd_negotiate_options(NBDClient *client, Error
**errp)
*/
static coroutine_fn int nbd_negotiate(NBDClient *client, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
char buf[NBD_OLDSTYLE_NEGOTIATE_SIZE] = "";
int ret;
@@ -1646,6 +1650,7 @@ void nbd_export_close(NBDExport *exp)
void nbd_export_remove(NBDExport *exp, NbdServerRemoveMode mode, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
if (mode == NBD_SERVER_REMOVE_MODE_HARD || QTAILQ_EMPTY(&exp->clients)) {
nbd_export_close(exp);
return;
--
2.21.0
- [PATCH v6 00/11] error: auto propagated local_err part I, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 06/11] pflash: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 08/11] virtio-9p: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 10/11] nbd: introduce ERRP_AUTO_PROPAGATE,
Vladimir Sementsov-Ogievskiy <=
- [PATCH v6 04/11] hw/sd/ssi-sd: fix error handling in ssi_sd_realize, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 05/11] SD (Secure Card): introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 09/11] TPM: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 01/11] qapi/error: add (Error **errp) cleaning APIs, Vladimir Sementsov-Ogievskiy, 2020/01/10
- [PATCH v6 03/11] scripts: add coccinelle script to use auto propagated errp, Vladimir Sementsov-Ogievskiy, 2020/01/10