mirror of
https://github.com/systemd/systemd.git
synced 2024-11-08 11:27:32 +03:00
a755605296
Instead of having individual counters n_serializing and n_deserializing have a single one n_reloading, which should be sufficient. Set n_reloading when we are about to go down for reexecution to avoid cgroup trimming when we free the units for reexecution.
168 lines
4.1 KiB
C
168 lines
4.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <dirent.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "set.h"
|
|
#include "util.h"
|
|
#include "macro.h"
|
|
#include "fdset.h"
|
|
|
|
#define MAKE_SET(s) ((Set*) s)
|
|
#define MAKE_FDSET(s) ((FDSet*) s)
|
|
|
|
/* Make sure we can distuingish fd 0 and NULL */
|
|
#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
|
|
#define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
|
|
|
|
FDSet *fdset_new(void) {
|
|
return MAKE_FDSET(set_new(trivial_hash_func, trivial_compare_func));
|
|
}
|
|
|
|
void fdset_free(FDSet *s) {
|
|
void *p;
|
|
|
|
while ((p = set_steal_first(MAKE_SET(s)))) {
|
|
/* Valgrind's fd might have ended up in this set here,
|
|
* due to fdset_new_fill(). We'll ignore all failures
|
|
* here, so that the EBADFD that valgrind will return
|
|
* us on close() doesn't influence us */
|
|
|
|
/* When reloading duplicates of the private bus
|
|
* connection fds and suchlike are closed here, which
|
|
* has no effect at all, since they are only
|
|
* duplicates. So don't be surprised about these log
|
|
* messages. */
|
|
|
|
log_debug("Closing left-over fd %i", PTR_TO_FD(p));
|
|
close_nointr(PTR_TO_FD(p));
|
|
}
|
|
|
|
set_free(MAKE_SET(s));
|
|
}
|
|
|
|
int fdset_put(FDSet *s, int fd) {
|
|
assert(s);
|
|
assert(fd >= 0);
|
|
|
|
return set_put(MAKE_SET(s), FD_TO_PTR(fd));
|
|
}
|
|
|
|
int fdset_put_dup(FDSet *s, int fd) {
|
|
int copy, r;
|
|
|
|
assert(s);
|
|
assert(fd >= 0);
|
|
|
|
if ((copy = fcntl(fd, F_DUPFD_CLOEXEC, 3)) < 0)
|
|
return -errno;
|
|
|
|
if ((r = fdset_put(s, copy)) < 0) {
|
|
close_nointr_nofail(copy);
|
|
return r;
|
|
}
|
|
|
|
return copy;
|
|
}
|
|
|
|
bool fdset_contains(FDSet *s, int fd) {
|
|
assert(s);
|
|
assert(fd >= 0);
|
|
|
|
return !!set_get(MAKE_SET(s), FD_TO_PTR(fd));
|
|
}
|
|
|
|
int fdset_remove(FDSet *s, int fd) {
|
|
assert(s);
|
|
assert(fd >= 0);
|
|
|
|
return set_remove(MAKE_SET(s), FD_TO_PTR(fd)) ? fd : -ENOENT;
|
|
}
|
|
|
|
int fdset_new_fill(FDSet **_s) {
|
|
DIR *d;
|
|
struct dirent *de;
|
|
int r = 0;
|
|
FDSet *s;
|
|
|
|
assert(_s);
|
|
|
|
/* Creates an fdsets and fills in all currently open file
|
|
* descriptors. */
|
|
|
|
if (!(d = opendir("/proc/self/fd")))
|
|
return -errno;
|
|
|
|
if (!(s = fdset_new())) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
while ((de = readdir(d))) {
|
|
int fd = -1;
|
|
|
|
if (ignore_file(de->d_name))
|
|
continue;
|
|
|
|
if ((r = safe_atoi(de->d_name, &fd)) < 0)
|
|
goto finish;
|
|
|
|
if (fd < 3)
|
|
continue;
|
|
|
|
if (fd == dirfd(d))
|
|
continue;
|
|
|
|
if ((r = fdset_put(s, fd)) < 0)
|
|
goto finish;
|
|
}
|
|
|
|
r = 0;
|
|
*_s = s;
|
|
s = NULL;
|
|
|
|
finish:
|
|
closedir(d);
|
|
|
|
/* We won't close the fds here! */
|
|
if (s)
|
|
set_free(MAKE_SET(s));
|
|
|
|
return r;
|
|
}
|
|
|
|
int fdset_cloexec(FDSet *fds, bool b) {
|
|
Iterator i;
|
|
void *p;
|
|
int r;
|
|
|
|
assert(fds);
|
|
|
|
SET_FOREACH(p, MAKE_SET(fds), i)
|
|
if ((r = fd_cloexec(PTR_TO_FD(p), b)) < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|