- Attempt to use syscalls to determine max-open-files value.
- Add in periodic logging when max file limit reached
[If we can use msg_control for passing file descriptors])
fi
+#############################################
+# check for sysctlbyname
+AC_CACHE_CHECK([for sysctlbyname],samba_cv_sysctlbyname, [
+ AC_TRY_COMPILE([
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#include <stddef.h>],
+[
+ int sysctl_max;
+ size_t size = sizeof(sysctl_max);
+ sysctlbyname("test", &sysctl_max, &size, NULL, 0);
+],
+ samba_cv_sysctlbyname=yes,samba_cv_sysctlbyname=no)])
+if test x"$samba_cv_msghdr_msg_control" = x"yes"; then
+ AC_DEFINE(HAVE_SYSCTLBYNAME,1,
+ [If we support sysctlbyname api])
+fi
+
#############################################
# check for fd passing struct via msg_acctrights
AC_CACHE_CHECK([for fd passing via msg_acctrights],
}
}
+/**
+ * Function to return the default value for the maximum number of open
+ * file descriptors permitted. This function tries to consult the
+ * kernel-level (sysctl) and ulimit (getrlimit()) values and goes
+ * the smaller of those.
+ */
+static int max_open_files(void)
+{
+ int sysctl_max;
+ struct rlimit rl;
+ bool sysctl_worked = false, rlimit_worked = false;
+
+#ifdef HAVE_SYSCTLBYNAME
+ size_t size = sizeof(sysctl_max);
+ if (sysctlbyname("kern.maxfilesperproc", &sysctl_max, &size, NULL,0)==0)
+ sysctl_worked = true;
+#endif
+
+ if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
+ rlimit_worked = true;
+
+ if (sysctl_worked) {
+ if ((!rlimit_worked) ||
+ (rl.rlim_cur == RLIM_INFINITY) ||
+ (rl.rlim_cur > sysctl_max))
+ return sysctl_max;
+ else
+ return rl.rlim_cur;
+ } else {
+ if ((!rlimit_worked) ||
+ (rl.rlim_cur == RLIM_INFINITY))
+ return MAX_OPEN_FILES;
+ else
+ return rl.rlim_cur;
+ }
+}
/**
* Common part of freeing allocated data for one parameter.
Globals.getwd_cache = true;
Globals.bLargeReadwrite = True;
Globals.max_log_size = 5000;
- Globals.max_open_files = MAX_OPEN_FILES;
+ Globals.max_open_files = max_open_files();
Globals.open_files_db_hash_size = SMB_OPEN_DATABASE_TDB_HASH_SIZE;
Globals.maxprotocol = PROTOCOL_NT1;
Globals.minprotocol = PROTOCOL_CORE;
fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
if (fsp->fh->fd == -1) {
status = map_nt_error_from_unix(errno);
+ if (errno == EMFILE) {
+ static time_t last_warned = 0L;
+
+ if (time((time_t *) NULL) > last_warned) {
+ DEBUG(0,("Too many open files, unable "
+ "to open more! smbd's max "
+ "open files = %d\n",
+ lp_max_open_files()));
+ last_warned = time((time_t *) NULL);
+ }
+ }
+
}
DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",