[M] Change in libosmocore[master]: gsmtap_util: Use Osmo IO instead of Osmo write queues

Attention is currently required from: daniel, laforge, pespin. arehbein has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmocore/+/34743?usp=email ) Change subject: gsmtap_util: Use Osmo IO instead of Osmo write queues ...................................................................... Patch Set 8: (1 comment) File src/core/gsmtap_util.c: https://gerrit.osmocom.org/c/libosmocore/+/34743/comment/8a7aef64_440b964c PS5, Line 478: osmo_iofd_setup(gti, gti->sink_fd, "gsmtap_inst.out", OSMO_IO_FD_MODE_READ_WRITE, &gsmtap_sink_ops, NULL); @dwillmann@sysmocom.de there's a bug in Osmo IO, basically if gsmtap logging is used, then if the queue overflows, we get an infinite call loop ``` #3729 0x00007ffff7e0e0f4 in _gsmtap_raw_output (target=0x555555617c60, subsys=31, level=7, file=0x7ffff7e45249 "osmo_io.c", line=377, cont=0, format=0x7ffff7e453d8 "iofd(%s)enqueueing message failed (%d). Rejecting msgb\n", ap=0x7fffff873e20) at logging_gsmtap.c:117 #3730 0x00007ffff7e0c335 in osmo_vlogp (subsys=31, level=7, file=0x7ffff7e45249 "osmo_io.c", line=377, cont=0, format=0x7ffff7e453d8 "iofd(%s)enqueueing message failed (%d). Rejecting msgb\n", ap=0x7fffff873e98) at logging.c:728 #3731 0x00007ffff7e0c52b in logp2 (subsys=-29, level=7, file=0x7ffff7e45249 "osmo_io.c", line=377, cont=0, format=0x7ffff7e453d8 "iofd(%s)enqueueing message failed (%d). Rejecting msgb\n") at logging.c:766 #3732 0x00007ffff7e1643e in osmo_iofd_write_msgb (iofd=0x555555635910, msg=0x555558bf1ec0) at osmo_io.c:377 ``` (see backtrace numbers :)) because of the LOGPIO call in case of overflow. Not sure if this was also a bug when Osmo write queues were used (if LOGPIO was called to log a full-queue error, then yes...) -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/34743?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: Iadbbef74e3add7001d84dd6b68f51eac293e44d0 Gerrit-Change-Number: 34743 Gerrit-PatchSet: 8 Gerrit-Owner: arehbein <arehbein(a)sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: daniel <dwillmann(a)sysmocom.de> Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-Reviewer: pespin <pespin(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Attention: pespin <pespin(a)sysmocom.de> Gerrit-Attention: daniel <dwillmann(a)sysmocom.de> Gerrit-Comment-Date: Tue, 31 Oct 2023 09:56:11 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: arehbein <arehbein(a)sysmocom.de> Comment-In-Reply-To: laforge <laforge(a)osmocom.org> Comment-In-Reply-To: pespin <pespin(a)sysmocom.de> Comment-In-Reply-To: daniel <dwillmann(a)sysmocom.de> Gerrit-MessageType: comment