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Don't set cur=inf RLIM_NOFILE on macOS

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virProcessActivateMaxFiles sets rlim_cur to rlim_max.
If rlim_max is RLIM_INFINITY,

2023-08-15 15:17:51.944+0000: 4456752640: debug :
virProcessActivateMaxFiles:1067 : Initial max files was 2560
2023-08-15 15:17:51.944+0000: 4456752640: debug :
virProcessActivateMaxFiles:1077 : Raised max files to
9223372036854775807

then when virCommandMassClose does `int openmax = sysconf(
_SC_OPEN_MAX)`, `openmax < 0` is true and virCommandMassClose
reports an error and bails.  Setting rlim_cur instead to at most
OPEN_MAX, as macOS' documentation suggests, both avoids this problem

2023-08-18 16:01:44.366+0000: 4359562752: debug :
virProcessActivateMaxFiles:1072 : Initial max files was 256
2023-08-18 16:01:44.366+0000: 4359562752: debug :
virProcessActivateMaxFiles:1086 : Raised max files to 10240

and eliminates a case of what the documentation declares
to be invalid input to setrlimit anyway.

Signed-off-by: Laura Hild <lsh@jlab.org>
This commit is contained in:
Laura Hild 2023-08-15 10:54:20 -04:00 committed by Daniel P. Berrangé
parent 120724bc6d
commit c4d96fdd3c
1 changed files with 18 additions and 1 deletions
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19
src/util/virprocess.c
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@ -39,7 +39,7 @@
# include <sched.h>
#endif
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || WITH_BSD_CPU_AFFINITY
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || WITH_BSD_CPU_AFFINITY || defined(__APPLE__)
# include <sys/param.h>
#endif
@ -61,6 +61,10 @@
# include <sys/prctl.h>
#endif
#if defined(__APPLE__)
# include <sys/syslimits.h>
#endif
#include "virprocess.h"
#include "virerror.h"
#include "viralloc.h"
@ -1066,7 +1070,20 @@ virProcessActivateMaxFiles(void)
VIR_DEBUG("Initial max files was %llu", (unsigned long long)maxfiles.rlim_cur);
# if defined(__APPLE__)
/*
* rlim_max may be RLIM_INFINITY, and macOS 12.6.3 getrlimit(2) says
*
* COMPATIBILITY
* setrlimit() now returns with errno set to EINVAL in places
* that historically succeeded. It no longer accepts
* "rlim_cur = RLIM_INFINITY" for RLIM_NOFILE.
* Use "rlim_cur = min(OPEN_MAX, rlim_max)".
*/
maxfiles.rlim_cur = MIN(OPEN_MAX, maxfiles.rlim_max);
# else
maxfiles.rlim_cur = maxfiles.rlim_max;
# endif
if (setrlimit(RLIMIT_NOFILE, &maxfiles) < 0) {
VIR_DEBUG("Unable to set process max files limit to %llu: %s",