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| author | Vladimir Sementsov-Ogievskiy | 2020-07-07 18:50:36 +0200 |
|---|---|---|
| committer | Markus Armbruster | 2020-07-10 15:18:09 +0200 |
| commit | 795d946d0797e7ba28ed97c86e2592e346b02b0e (patch) | |
| tree | 0d3e603251cc44c606034cab3cb9464a6d7e376c /include/block | |
| parent | virtio-9p: Use ERRP_GUARD() (diff) | |
| download | qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.tar.gz qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.tar.xz qemu-795d946d0797e7ba28ed97c86e2592e346b02b0e.zip | |
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 'include/block')
| -rw-r--r-- | include/block/nbd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/block/nbd.h b/include/block/nbd.h index 20363280ae..9bc3bfaeec 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -361,6 +361,7 @@ void nbd_server_start_options(NbdServerOptions *arg, Error **errp); static inline int nbd_read(QIOChannel *ioc, void *buffer, size_t size, const char *desc, Error **errp) { + ERRP_GUARD(); int ret = qio_channel_read_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; if (ret < 0) { |