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[Qemu-devel] [PATCH 08/19] nbd/server: get rid of fail: return rc
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-devel] [PATCH 08/19] nbd/server: get rid of fail: return rc |
Date: |
Tue, 30 May 2017 17:30:41 +0300 |
"goto fail" error handling scheme is not needed for just returning
error code. Better is return it immediately.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
nbd/server.c | 28 ++++++++++++----------------
1 file changed, 12 insertions(+), 16 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index 984fad4bdb..4e9d33d83c 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -265,7 +265,6 @@ static int nbd_negotiate_handle_list(NBDClient *client,
uint32_t length)
static int nbd_negotiate_handle_export_name(NBDClient *client, uint32_t length)
{
- int rc = -EINVAL;
char name[NBD_MAX_NAME_SIZE + 1];
/* Client sends:
@@ -274,11 +273,11 @@ static int nbd_negotiate_handle_export_name(NBDClient
*client, uint32_t length)
TRACE("Checking length");
if (length >= sizeof(name)) {
LOG("Bad length received");
- goto fail;
+ return -EINVAL;
}
if (read_sync(client->ioc, name, length, NULL) < 0) {
LOG("read failed");
- goto fail;
+ return -EINVAL;
}
name[length] = '\0';
@@ -287,14 +286,13 @@ static int nbd_negotiate_handle_export_name(NBDClient
*client, uint32_t length)
client->exp = nbd_export_find(name);
if (!client->exp) {
LOG("export not found");
- goto fail;
+ return -EINVAL;
}
QTAILQ_INSERT_TAIL(&client->exp->clients, client, next);
nbd_export_get(client->exp);
- rc = 0;
-fail:
- return rc;
+
+ return 0;
}
/* Handle NBD_OPT_STARTTLS. Return NULL to drop connection, or else the
@@ -564,7 +562,6 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
*/
qio_channel_set_blocking(client->ioc, false, NULL);
- rc = -EINVAL;
TRACE("Beginning negotiation.");
memset(buf, 0, sizeof(buf));
@@ -585,21 +582,21 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
if (oldStyle) {
if (client->tlscreds) {
TRACE("TLS cannot be enabled with oldstyle protocol");
- goto fail;
+ return -EINVAL;
}
if (write_sync(client->ioc, buf, sizeof(buf), NULL) < 0) {
LOG("write failed");
- goto fail;
+ return -EINVAL;
}
} else {
if (write_sync(client->ioc, buf, 18, NULL) < 0) {
LOG("write failed");
- goto fail;
+ return -EINVAL;
}
rc = nbd_negotiate_options(client);
if (rc != 0) {
LOG("option negotiation failed");
- goto fail;
+ return rc;
}
TRACE("advertising size %" PRIu64 " and flags %x",
@@ -610,14 +607,13 @@ static coroutine_fn int nbd_negotiate(NBDClient *client)
rc = write_sync(client->ioc, buf + 18, len, NULL);
if (rc < 0) {
LOG("write failed");
- goto fail;
+ return rc;
}
}
TRACE("Negotiation succeeded.");
- rc = 0;
-fail:
- return rc;
+
+ return 0;
}
static int nbd_receive_request(QIOChannel *ioc, NBDRequest *request)
--
2.11.1
- [Qemu-devel] [PATCH 00/19] nbd errors and traces refactoring, Vladimir Sementsov-Ogievskiy, 2017/05/30
- [Qemu-devel] [PATCH 08/19] nbd/server: get rid of fail: return rc,
Vladimir Sementsov-Ogievskiy <=
- [Qemu-devel] [PATCH 07/19] nbd/server: nbd_negotiate: fix error path, Vladimir Sementsov-Ogievskiy, 2017/05/30
- [Qemu-devel] [PATCH 10/19] nbd/server: refactor nbd_trip, Vladimir Sementsov-Ogievskiy, 2017/05/30
- [Qemu-devel] [PATCH 13/19] nbd/server: return original error codes, Vladimir Sementsov-Ogievskiy, 2017/05/30
- [Qemu-devel] [PATCH 09/19] nbd/server: rename rc to ret, Vladimir Sementsov-Ogievskiy, 2017/05/30
- [Qemu-devel] [PATCH 05/19] nbd/server: refactor nbd_co_receive_request, Vladimir Sementsov-Ogievskiy, 2017/05/30