src/sys/dev/filemon, branch releng/12.4

Fix some filemon path logging issues.

2018-08-03T19:24:04Z

- Properly handle snprintf return value for truncation and avoid overflowing the later write with the bogus length. - Increase the msgbufr size to handle a rename of 2 full files. The larger allocation causes a slight performance hit which will be mitigated in the future. A rewrite with sbufs will likely be done as well. Reported by: Ilja Van Sprundel MFC after: 2 weeks Approved by: so (gtetlow) Reviewed by: kib Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D16098

Eliminate the overhead of gratuitous repeated reinitialization of cap_rights

2018-05-09T18:47:24Z

- Add macros to allow preinitialization of cap_rights_t. - Convert most commonly used code paths to use preinitialized cap_rights_t. A 3.6% speedup in fstat was measured with this change. Reported by: mjg Reviewed by: oshogbo Approved by: sbruno MFC after: 1 month

Move most of the contents of opt_compat.h to opt_global.h.

2018-04-06T17:35:35Z

opt_compat.h is mentioned in nearly 180 files. In-progress network driver compabibility improvements may add over 100 more so this is closer to "just about everywhere" than "only some files" per the guidance in sys/conf/options. Keep COMPAT_LINUX32 in opt_compat.h as it is confined to a subset of sys/compat/linux/*.c. A fake _COMPAT_LINUX option ensure opt_compat.h is created on all architectures. Move COMPAT_LINUXKPI to opt_dontuse.h as it is only used to control the set of compiled files. Reviewed by: kib, cem, jhb, jtl Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D14941

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

Avoid taking PROC_LOCK in syscalls if not being traced.

2016-08-12T16:05:53Z

MFC after: 1 week Sponsored by: EMC / Isilon Storage Division

Cleanup COMPAT_FREEBSD32 support.

2016-06-05T18:16:33Z

This is a NOP. The COMPAT_IA32 was renamed in r205014 to COMPAT_FREEBSD32 and COMPAT_ARCH32 does not seem to have existed. Also remove some leftovers from the sysent rework in r301404. Include freebsd32_util.h for the freebsd32_sysent prototype. X-MFC-With: r301404 Reported by: kib MFC after: 3 days Sponsored by: EMC / Isilon Storage Division

Fix build after r301404.

2016-06-04T23:34:51Z

X-MFC-With: r301404 MFC after: 1 week

Support all architectures by just using sysent.

2016-06-04T17:39:42Z

PowerPC64 has two different ABIs, neither of which is elf64_freebsd_sysvec. Using sysent and freebsd32_sysent achieves the same effect. X-MFC-With: r301130 MFC after: 1 week Sponsored by: EMC / Isilon Storage Division

Don't truncate existing error when writing the log.

2016-05-27T23:58:00Z

Suggested by: markj MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division

Rename function to be less generic.

2016-05-27T23:57:57Z

MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division