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authorVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>2018-03-12 18:21:19 +0300
committerEric Blake <eblake@redhat.com>2018-03-13 15:38:55 -0500
commit2e425fd56849d36485131b3363ab596d39e0e13b (patch)
tree3e4298cb77d5d67e8b1d92ca271a6bca729355a9
parent44a8174e0a2919693dc28f19c3ce8eef6d4ac2c3 (diff)
nbd/server: add nbd_opt_invalid helper
NBD_REP_ERR_INVALID is often parameter to nbd_opt_drop and it would be used more in following patches. So, let's add a helper. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180312152126.286890-2-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
-rw-r--r--nbd/server.c50
1 files changed, 36 insertions, 14 deletions
diff --git a/nbd/server.c b/nbd/server.c
index 4776009a2d..01ea97afe9 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -218,22 +218,46 @@ nbd_negotiate_send_rep_err(NBDClient *client, uint32_t type,
/* Drop remainder of the current option, and send a reply with the
* given error type and message. Return -errno on read or write
* failure; or 0 if connection is still live. */
-static int GCC_FMT_ATTR(4, 5)
-nbd_opt_drop(NBDClient *client, uint32_t type, Error **errp,
- const char *fmt, ...)
+static int GCC_FMT_ATTR(4, 0)
+nbd_opt_vdrop(NBDClient *client, uint32_t type, Error **errp,
+ const char *fmt, va_list va)
{
int ret = nbd_drop(client->ioc, client->optlen, errp);
- va_list va;
client->optlen = 0;
if (!ret) {
- va_start(va, fmt);
ret = nbd_negotiate_send_rep_verr(client, type, errp, fmt, va);
- va_end(va);
}
return ret;
}
+static int GCC_FMT_ATTR(4, 5)
+nbd_opt_drop(NBDClient *client, uint32_t type, Error **errp,
+ const char *fmt, ...)
+{
+ int ret;
+ va_list va;
+
+ va_start(va, fmt);
+ ret = nbd_opt_vdrop(client, type, errp, fmt, va);
+ va_end(va);
+
+ return ret;
+}
+
+static int GCC_FMT_ATTR(3, 4)
+nbd_opt_invalid(NBDClient *client, Error **errp, const char *fmt, ...)
+{
+ int ret;
+ va_list va;
+
+ va_start(va, fmt);
+ ret = nbd_opt_vdrop(client, NBD_REP_ERR_INVALID, errp, fmt, va);
+ va_end(va);
+
+ return ret;
+}
+
/* Read size bytes from the unparsed payload of the current option.
* Return -errno on I/O error, 0 if option was completely handled by
* sending a reply about inconsistent lengths, or 1 on success. */
@@ -241,9 +265,9 @@ static int nbd_opt_read(NBDClient *client, void *buffer, size_t size,
Error **errp)
{
if (size > client->optlen) {
- return nbd_opt_drop(client, NBD_REP_ERR_INVALID, errp,
- "Inconsistent lengths in option %s",
- nbd_opt_lookup(client->opt));
+ return nbd_opt_invalid(client, errp,
+ "Inconsistent lengths in option %s",
+ nbd_opt_lookup(client->opt));
}
client->optlen -= size;
return qio_channel_read_all(client->ioc, buffer, size, errp) < 0 ? -EIO : 1;
@@ -398,9 +422,8 @@ static int nbd_reject_length(NBDClient *client, bool fatal, Error **errp)
int ret;
assert(client->optlen);
- ret = nbd_opt_drop(client, NBD_REP_ERR_INVALID, errp,
- "option '%s' has unexpected length",
- nbd_opt_lookup(client->opt));
+ ret = nbd_opt_invalid(client, errp, "option '%s' has unexpected length",
+ nbd_opt_lookup(client->opt));
if (fatal && !ret) {
error_setg(errp, "option '%s' has unexpected length",
nbd_opt_lookup(client->opt));
@@ -438,8 +461,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, uint16_t myflags,
}
be32_to_cpus(&namelen);
if (namelen >= sizeof(name)) {
- return nbd_opt_drop(client, NBD_REP_ERR_INVALID, errp,
- "name too long for qemu");
+ return nbd_opt_invalid(client, errp, "name too long for qemu");
}
rc = nbd_opt_read(client, name, namelen, errp);
if (rc <= 0) {