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author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2020-07-07 18:50:36 +0200 |
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committer | Markus Armbruster <armbru@redhat.com> | 2020-07-10 15:18:09 +0200 |
commit | 795d946d0797e7ba28ed97c86e2592e346b02b0e (patch) | |
tree | 0d3e603251cc44c606034cab3cb9464a6d7e376c /block/nbd.c | |
parent | 92c451222c541ce2bdcd0483550f472ec5fcfb5f (diff) | |
download | qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.zip qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.tar.gz qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.tar.bz2 |
nbd: Use ERRP_GUARD()
If we want to check error after errp-function call, we need to
introduce local_err and then propagate it to errp. Instead, use
the ERRP_GUARD() macro, benefits are:
1. No need of explicit error_propagate call
2. No need of explicit local_err variable: use errp directly
3. ERRP_GUARD() 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)
If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_GUARD() 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 several such cases, e.g. in nbd_read().
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/errp-guard.cocci \
--macro-file scripts/cocci-macro-file.h \
--in-place --no-show-diff --max-width 80
Reported-by: Kevin Wolf <kwolf@redhat.com>
Reported-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200707165037.1026246-8-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[ERRP_AUTO_PROPAGATE() renamed to ERRP_GUARD(), and
auto-propagated-errp.cocci to errp-guard.cocci. Commit message
tweaked again.]
Diffstat (limited to 'block/nbd.c')
-rw-r--r-- | block/nbd.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/block/nbd.c b/block/nbd.c index 6876da0..c297336 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -1408,16 +1408,15 @@ static void nbd_client_close(BlockDriverState *bs) static QIOChannelSocket *nbd_establish_connection(SocketAddress *saddr, Error **errp) { + ERRP_GUARD(); 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; } |