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ircd::fs: Add conf item and call to setrlimit for RLIMIT_NOFILE.

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This commit is contained in:
Jason Volk 2020-03-20 10:45:03 -07:00
parent a867cfa51a
commit 4d88f92b76
1 changed files with 65 additions and 2 deletions
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67
ircd/fs.cc
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@ -37,7 +37,38 @@ ircd::fs::log
// init
//
namespace ircd::fs
{
extern conf::item<ulong> rlimit_nofile;
static void init_rlimit_nofile();
static void init_dump_info();
}
decltype(ircd::fs::rlimit_nofile)
ircd::fs::rlimit_nofile
{
{ "name", "ircd.fs.rlimit.nofile" },
{ "default", 65535L },
{ "persist", false },
};
//
// init::init
//
ircd::fs::init::init()
{
init_rlimit_nofile();
init_dump_info();
}
ircd::fs::init::~init()
noexcept
{
}
void
ircd::fs::init_dump_info()
{
const bool support_async
{
@ -61,10 +92,42 @@ ircd::fs::init::init()
};
}
ircd::fs::init::~init()
noexcept
#if defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_NOFILE)
void
ircd::fs::init_rlimit_nofile()
try
{
rlimit rlim[2] {0};
syscall(getrlimit, RLIMIT_NOFILE, &rlim[0]);
rlim[1] = rlim[0];
rlim[1].rlim_cur = std::max(rlim[1].rlim_cur, ulong(fs::rlimit_nofile));
rlim[1].rlim_cur = std::min(rlim[1].rlim_cur, rlim[1].rlim_max);
syscall(setrlimit, RLIMIT_NOFILE, &rlim[1]);
log::info
{
log, "Raised resource limit for number of open files from %ld to %ld",
rlim[0].rlim_cur,
rlim[1].rlim_cur,
};
}
catch(const std::system_error &e)
{
log::warning
{
log, "Failed to raise resource limit for number of open files :%s",
e.what()
};
}
#else
void
ircd::fs::init_rlimit_nofile()
{
log::dwarning
{
log, "Cannot modify resource limit for number of open files."
};
}
#endif
///////////////////////////////////////////////////////////////////////////////
//