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From 24a40953d3d6ad8b1429d19da2f66399ae3f7e0b Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Thu, 5 Aug 2021 03:14:41 +0900
Subject: [PATCH] core: wrap cgroup path with empty_to_root() in log messages
This fixes e.g. the following log message:
---
systemd[1]: -.slice: Failed to migrate controller cgroups from , ignoring: Read-only file system
---
(cherry picked from commit 6178e2f88956e1900f445908ed053865cc22e879)
Conflict:NA
Reference:https://github.com/systemd/systemd/commit/24a40953d3d6ad8b1429d19da2f66399ae3f7e0b
---
src/core/bpf-devices.c | 3 ++-
src/core/cgroup.c | 46 +++++++++++++++++++++---------------------
src/core/unit.c | 6 +++---
3 files changed, 28 insertions(+), 27 deletions(-)
diff --git a/src/core/bpf-devices.c b/src/core/bpf-devices.c
index 8a345a4498..4daa7f76b0 100644
--- a/src/core/bpf-devices.c
+++ b/src/core/bpf-devices.c
@@ -9,6 +9,7 @@
#include "fileio.h"
#include "nulstr-util.h"
#include "parse-util.h"
+#include "path-util.h"
#include "stat-util.h"
#include "stdio-util.h"
#include "string-util.h"
@@ -260,7 +261,7 @@ int bpf_devices_apply_policy(
r = bpf_program_cgroup_attach(prog, BPF_CGROUP_DEVICE, controller_path, BPF_F_ALLOW_MULTI);
if (r < 0)
return log_error_errno(r, "Attaching device control BPF program to cgroup %s failed: %m",
- cgroup_path);
+ empty_to_root(cgroup_path));
finish:
/* Unref the old BPF program (which will implicitly detach it) right before attaching the new program. */
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index eab0929dc5..3a6f768c60 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -84,7 +84,7 @@ static int set_attribute_and_warn(Unit *u, const char *controller, const char *a
r = cg_set_attribute(controller, u->cgroup_path, attribute, value);
if (r < 0)
log_unit_full_errno(u, LOG_LEVEL_CGROUP_WRITE(r), r, "Failed to set '%s' attribute on '%s' to '%.*s': %m",
- strna(attribute), isempty(u->cgroup_path) ? "/" : u->cgroup_path, (int) strcspn(value, NEWLINE), value);
+ strna(attribute), empty_to_root(u->cgroup_path), (int) strcspn(value, NEWLINE), value);
return r;
}
@@ -713,25 +713,25 @@ void cgroup_oomd_xattr_apply(Unit *u, const char *cgroup_path) {
if (c->moom_preference == MANAGED_OOM_PREFERENCE_OMIT) {
r = cg_set_xattr(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, "user.oomd_omit", "1", 1, 0);
if (r < 0)
- log_unit_debug_errno(u, r, "Failed to set oomd_omit flag on control group %s, ignoring: %m", cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to set oomd_omit flag on control group %s, ignoring: %m", empty_to_root(cgroup_path));
}
if (c->moom_preference == MANAGED_OOM_PREFERENCE_AVOID) {
r = cg_set_xattr(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, "user.oomd_avoid", "1", 1, 0);
if (r < 0)
- log_unit_debug_errno(u, r, "Failed to set oomd_avoid flag on control group %s, ignoring: %m", cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to set oomd_avoid flag on control group %s, ignoring: %m", empty_to_root(cgroup_path));
}
if (c->moom_preference != MANAGED_OOM_PREFERENCE_AVOID) {
r = cg_remove_xattr(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, "user.oomd_avoid");
if (r < 0 && r != -ENODATA)
- log_unit_debug_errno(u, r, "Failed to remove oomd_avoid flag on control group %s, ignoring: %m", cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to remove oomd_avoid flag on control group %s, ignoring: %m", empty_to_root(cgroup_path));
}
if (c->moom_preference != MANAGED_OOM_PREFERENCE_OMIT) {
r = cg_remove_xattr(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, "user.oomd_omit");
if (r < 0 && r != -ENODATA)
- log_unit_debug_errno(u, r, "Failed to remove oomd_omit flag on control group %s, ignoring: %m", cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to remove oomd_omit flag on control group %s, ignoring: %m", empty_to_root(cgroup_path));
}
}
@@ -750,7 +750,7 @@ static void cgroup_xattr_apply(Unit *u) {
sd_id128_to_string(u->invocation_id, ids), 32,
0);
if (r < 0)
- log_unit_debug_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", u->cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to set invocation ID on control group %s, ignoring: %m", empty_to_root(u->cgroup_path));
}
if (unit_cgroup_delegate(u)) {
@@ -759,11 +759,11 @@ static void cgroup_xattr_apply(Unit *u) {
"1", 1,
0);
if (r < 0)
- log_unit_debug_errno(u, r, "Failed to set delegate flag on control group %s, ignoring: %m", u->cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to set delegate flag on control group %s, ignoring: %m", empty_to_root(u->cgroup_path));
} else {
r = cg_remove_xattr(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, "trusted.delegate");
if (r < 0 && r != -ENODATA)
- log_unit_debug_errno(u, r, "Failed to remove delegate flag on control group %s, ignoring: %m", u->cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to remove delegate flag on control group %s, ignoring: %m", empty_to_root(u->cgroup_path));
}
cgroup_oomd_xattr_apply(u, u->cgroup_path);
@@ -1921,12 +1921,12 @@ int unit_watch_cgroup(Unit *u) {
* is not an error */
return 0;
- return log_unit_error_errno(u, errno, "Failed to add control inotify watch descriptor for control group %s: %m", u->cgroup_path);
+ return log_unit_error_errno(u, errno, "Failed to add control inotify watch descriptor for control group %s: %m", empty_to_root(u->cgroup_path));
}
r = hashmap_put(u->manager->cgroup_control_inotify_wd_unit, INT_TO_PTR(u->cgroup_control_inotify_wd), u);
if (r < 0)
- return log_unit_error_errno(u, r, "Failed to add control inotify watch descriptor to hash map: %m");
+ return log_unit_error_errno(u, r, "Failed to add control inotify watch descriptor for control group %s to hash map: %m", empty_to_root(u->cgroup_path));
return 0;
}
@@ -1984,12 +1984,12 @@ int unit_watch_cgroup_memory(Unit *u) {
* is not an error */
return 0;
- return log_unit_error_errno(u, errno, "Failed to add memory inotify watch descriptor for control group %s: %m", u->cgroup_path);
+ return log_unit_error_errno(u, errno, "Failed to add memory inotify watch descriptor for control group %s: %m", empty_to_root(u->cgroup_path));
}
r = hashmap_put(u->manager->cgroup_memory_inotify_wd_unit, INT_TO_PTR(u->cgroup_memory_inotify_wd), u);
if (r < 0)
- return log_unit_error_errno(u, r, "Failed to add memory inotify watch descriptor to hash map: %m");
+ return log_unit_error_errno(u, r, "Failed to add memory inotify watch descriptor for control group %s to hash map: %m", empty_to_root(u->cgroup_path));
return 0;
}
@@ -2012,9 +2012,9 @@ int unit_pick_cgroup_path(Unit *u) {
r = unit_set_cgroup_path(u, path);
if (r == -EEXIST)
- return log_unit_error_errno(u, r, "Control group %s exists already.", path);
+ return log_unit_error_errno(u, r, "Control group %s exists already.", empty_to_root(path));
if (r < 0)
- return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", path);
+ return log_unit_error_errno(u, r, "Failed to set unit's control group path to %s: %m", empty_to_root(path));
return 0;
}
@@ -2042,7 +2042,7 @@ static int unit_update_cgroup(
/* First, create our own group */
r = cg_create_everywhere(u->manager->cgroup_supported, target_mask, u->cgroup_path);
if (r < 0)
- return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", u->cgroup_path);
+ return log_unit_error_errno(u, r, "Failed to create cgroup %s: %m", empty_to_root(u->cgroup_path));
created = r;
/* Start watching it */
@@ -2058,7 +2058,7 @@ static int unit_update_cgroup(
/* Enable all controllers we need */
r = cg_enable_everywhere(u->manager->cgroup_supported, enable_mask, u->cgroup_path, &result_mask);
if (r < 0)
- log_unit_warning_errno(u, r, "Failed to enable/disable controllers on cgroup %s, ignoring: %m", u->cgroup_path);
+ log_unit_warning_errno(u, r, "Failed to enable/disable controllers on cgroup %s, ignoring: %m", empty_to_root(u->cgroup_path));
/* Remember what's actually enabled now */
u->cgroup_enabled_mask = result_mask;
@@ -2080,12 +2080,12 @@ static int unit_update_cgroup(
if (cg_all_unified() == 0) {
r = cg_migrate_v1_controllers(u->manager->cgroup_supported, migrate_mask, u->cgroup_path, migrate_callback, u);
if (r < 0)
- log_unit_warning_errno(u, r, "Failed to migrate controller cgroups from %s, ignoring: %m", u->cgroup_path);
+ log_unit_warning_errno(u, r, "Failed to migrate controller cgroups from %s, ignoring: %m", empty_to_root(u->cgroup_path));
is_root_slice = unit_has_name(u, SPECIAL_ROOT_SLICE);
r = cg_trim_v1_controllers(u->manager->cgroup_supported, ~target_mask, u->cgroup_path, !is_root_slice);
if (r < 0)
- log_unit_warning_errno(u, r, "Failed to delete controller cgroups %s, ignoring: %m", u->cgroup_path);
+ log_unit_warning_errno(u, r, "Failed to delete controller cgroups %s, ignoring: %m", empty_to_root(u->cgroup_path));
}
/* Set attributes */
@@ -2175,7 +2175,7 @@ int unit_attach_pids_to_cgroup(Unit *u, Set *pids, const char *suffix_path) {
log_unit_full_errno(u, again ? LOG_DEBUG : LOG_INFO, q,
"Couldn't move process "PID_FMT" to%s requested cgroup '%s': %m",
- pid, again ? " directly" : "", p);
+ pid, again ? " directly" : "", empty_to_root(p));
if (again) {
int z;
@@ -2187,7 +2187,7 @@ int unit_attach_pids_to_cgroup(Unit *u, Set *pids, const char *suffix_path) {
z = unit_attach_pid_to_cgroup_via_bus(u, pid, suffix_path);
if (z < 0)
- log_unit_info_errno(u, z, "Couldn't move process "PID_FMT" to requested cgroup '%s' (directly or via the system bus): %m", pid, p);
+ log_unit_info_errno(u, z, "Couldn't move process "PID_FMT" to requested cgroup '%s' (directly or via the system bus): %m", pid, empty_to_root(p));
else
continue; /* When the bus thing worked via the bus we are fully done for this PID. */
}
@@ -2221,7 +2221,7 @@ int unit_attach_pids_to_cgroup(Unit *u, Set *pids, const char *suffix_path) {
continue; /* Success! */
log_unit_debug_errno(u, q, "Failed to attach PID " PID_FMT " to requested cgroup %s in controller %s, falling back to unit's cgroup: %m",
- pid, p, cgroup_controller_to_string(c));
+ pid, empty_to_root(p), cgroup_controller_to_string(c));
}
/* So this controller is either not delegate or realized, or something else weird happened. In
@@ -2656,7 +2656,7 @@ void unit_prune_cgroup(Unit *u) {
* the containing slice is stopped. So even if we failed now, this unit shouldn't assume
* that the cgroup is still realized the next time it is started. Do not return early
* on error, continue cleanup. */
- log_unit_full_errno(u, r == -EBUSY ? LOG_DEBUG : LOG_WARNING, r, "Failed to destroy cgroup %s, ignoring: %m", u->cgroup_path);
+ log_unit_full_errno(u, r == -EBUSY ? LOG_DEBUG : LOG_WARNING, r, "Failed to destroy cgroup %s, ignoring: %m", empty_to_root(u->cgroup_path));
if (is_root_slice)
return;
@@ -2869,7 +2869,7 @@ void unit_add_to_cgroup_empty_queue(Unit *u) {
r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
if (r < 0) {
- log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path));
return;
}
if (r == 0)
diff --git a/src/core/unit.c b/src/core/unit.c
index 30afd5a776..47966bcf0d 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -427,7 +427,7 @@ bool unit_may_gc(Unit *u) {
r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path);
if (r < 0)
- log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", u->cgroup_path);
+ log_unit_debug_errno(u, r, "Failed to determine whether cgroup %s is empty: %m", empty_to_root(u->cgroup_path));
if (r <= 0)
return false;
}
@@ -4553,7 +4553,7 @@ int unit_kill_context(
log_func, u);
if (r < 0) {
if (!IN_SET(r, -EAGAIN, -ESRCH, -ENOENT))
- log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path);
+ log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", empty_to_root(u->cgroup_path));
} else if (r > 0) {
@@ -5011,7 +5011,7 @@ int unit_fork_helper_process(Unit *u, const char *name, pid_t *ret) {
if (u->cgroup_path) {
r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL);
if (r < 0) {
- log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path);
+ log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", empty_to_root(u->cgroup_path));
_exit(EXIT_CGROUP);
}
}
--
2.33.0
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