mirror_zfs

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Kyle Evans bee314a798 module: freebsd: avoid a taking a destroyed lock in zfs_zevent bits

At shutdown time, we drain all of the zevents and set the
ZEVENT_SHUTDOWN flag.  On FreeBSD, we may end up calling
zfs_zevent_destroy() after the zevent_lock has been destroyed while
the sysevent thread is winding down; we observe ESHUTDOWN, then back
out.

Events have already been drained, so just inline the kmem_free call in
sysevent_worker() to avoid the race, and document the assumption that
zfs_zevent_destroy doesn't do anything else useful at that point.

This fixes a panic that can occur at module unload time.

Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Closes #13220

2022-03-17 10:14:00 -07:00

avl

Clean up CSTYLEDs

2022-01-26 11:38:52 -08:00

icp

Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>

2022-03-15 15:13:48 -07:00

lua

Use _Noreturn (C11; GNU89) properly

2022-03-04 16:25:22 -08:00

nvpair

Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h>