[igt-dev] [PATCH i-g-t 1/2] Use the new procps library libproc2
Kamil Konieczny
kamil.konieczny at linux.intel.com
Fri May 12 18:35:11 UTC 2023
From: Craig Small <csmall at dropbear.xyz>
Added support for new libproc2.
[Corrected some errors pointed by checkpatch.pl,
add linux includes in #ifdef __linux__ section]
v2: changed to igt_fork_helper and added error print [Kamil]
v3: removed include <limits.h> pointed by Mauro [Kamil]
Signed-off-by: Craig Small <csmall at dropbear.xyz>
---
lib/igt_aux.c | 246 +++++++++++++++++++++++++++++++++++++++---------
lib/meson.build | 7 +-
meson.build | 10 +-
3 files changed, 219 insertions(+), 44 deletions(-)
diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 672d7d4b0..4c24b0928 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -52,8 +52,16 @@
#include <assert.h>
#include <grp.h>
-#include <proc/readproc.h>
-#include <libudev.h>
+#ifdef HAVE_LIBPROCPS
+# include <proc/readproc.h>
+#else
+# include <libproc2/pids.h>
+#endif
+
+#include <dirent.h>
+#ifdef __linux__
+# include <libudev.h>
+#endif
#include "drmtest.h"
#include "i915_drm.h"
@@ -1217,6 +1225,7 @@ void igt_unlock_mem(void)
*/
int igt_is_process_running(const char *comm)
{
+#if HAVE_LIBPROCPS
PROCTAB *proc;
proc_t *proc_info;
bool found = false;
@@ -1235,6 +1244,26 @@ int igt_is_process_running(const char *comm)
closeproc(proc);
return found;
+#else
+ enum pids_item Item[] = { PIDS_CMD };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+ char *pid_comm;
+ bool found = false;
+
+ if (procps_pids_new(&info, Item, 1) < 0)
+ return false;
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ pid_comm = PIDS_VAL(0, str, stack, info);
+ if (!strncasecmp(pid_comm, comm, strlen(pid_comm))) {
+ found = true;
+ break;
+ }
+ }
+
+ procps_pids_unref(&info);
+ return found;
+#endif
}
/**
@@ -1251,6 +1280,7 @@ int igt_is_process_running(const char *comm)
*/
int igt_terminate_process(int sig, const char *comm)
{
+#if HAVE_LIBPROCPS
PROCTAB *proc;
proc_t *proc_info;
int err = 0;
@@ -1272,6 +1302,28 @@ int igt_terminate_process(int sig, const char *comm)
closeproc(proc);
return err;
+#else
+ enum pids_item Items[] = { PIDS_ID_PID, PIDS_CMD };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+ char *pid_comm;
+ int pid;
+ int err = 0;
+
+ if (procps_pids_new(&info, Items, 2) < 0)
+ return -errno;
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ pid = PIDS_VAL(0, s_int, stack, info);
+ pid_comm = PIDS_VAL(1, str, stack, info);
+ if (!strncasecmp(pid_comm, comm, strlen(pid_comm))) {
+ if (kill(pid, sig) < 0)
+ err = -errno;
+ break;
+ }
+ }
+ procps_pids_unref(&info);
+ return err;
+#endif
}
struct pinfo {
@@ -1341,9 +1393,9 @@ igt_show_stat_header(void)
}
static void
-igt_show_stat(proc_t *info, int *state, const char *fn)
+igt_show_stat(const pid_t tid, const char *cmd, int *state, const char *fn)
{
- struct pinfo p = { .pid = info->tid, .comm = info->cmd, .fn = fn };
+ struct pinfo p = { .pid = tid, .comm = cmd, .fn = fn };
if (!*state)
igt_show_stat_header();
@@ -1353,7 +1405,7 @@ igt_show_stat(proc_t *info, int *state, const char *fn)
}
static void
-__igt_lsof_fds(proc_t *proc_info, int *state, char *proc_path, const char *dir)
+__igt_lsof_fds(const pid_t tid, const char *cmd, int *state, char *proc_path, const char *dir)
{
struct dirent *d;
struct stat st;
@@ -1400,7 +1452,7 @@ again:
dirn = dirname(copy_fd_lnk);
if (!strncmp(dir, dirn, strlen(dir)))
- igt_show_stat(proc_info, state, fd_lnk);
+ igt_show_stat(tid, cmd, state, fd_lnk);
free(copy_fd_lnk);
free(fd_lnk);
@@ -1416,13 +1468,13 @@ again:
static void
__igt_lsof(const char *dir)
{
- PROCTAB *proc;
- proc_t *proc_info;
-
char path[30];
char *name_lnk;
struct stat st;
int state = 0;
+#ifdef HAVE_LIBPROCPS
+ PROCTAB *proc;
+ proc_t *proc_info;
proc = openproc(PROC_FILLCOM | PROC_FILLSTAT | PROC_FILLARG);
igt_assert(proc != NULL);
@@ -1443,19 +1495,56 @@ __igt_lsof(const char *dir)
name_lnk[read] = '\0';
if (!strncmp(dir, name_lnk, strlen(dir)))
- igt_show_stat(proc_info, &state, name_lnk);
+ igt_show_stat(proc_info->tid, proc_info->cmd, &state, name_lnk);
/* check also fd, seems that lsof(8) doesn't look here */
memset(path, 0, sizeof(path));
snprintf(path, sizeof(path), "/proc/%d/fd", proc_info->tid);
- __igt_lsof_fds(proc_info, &state, path, dir);
+ __igt_lsof_fds(proc_info->tid, proc_info->cmd, &state, path, dir);
free(name_lnk);
freeproc(proc_info);
}
closeproc(proc);
+#else
+ enum pids_item Items[] = { PIDS_ID_PID, PIDS_CMD };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+
+ if (procps_pids_new(&info, Items, 2) < 0)
+ return;
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ ssize_t read;
+ int tid = PIDS_VAL(0, s_int, stack, info);
+ char *pid_comm = PIDS_VAL(1, str, stack, info);
+
+ /* check current working directory */
+ memset(path, 0, sizeof(path));
+ snprintf(path, sizeof(path), "/proc/%d/cwd", tid);
+
+ if (stat(path, &st) == -1)
+ continue;
+
+ name_lnk = malloc(st.st_size + 1);
+
+ igt_assert((read = readlink(path, name_lnk, st.st_size + 1)));
+ name_lnk[read] = '\0';
+
+ if (!strncmp(dir, name_lnk, strlen(dir)))
+ igt_show_stat(tid, pid_comm, &state, name_lnk);
+
+ /* check also fd, seems that lsof(8) doesn't look here */
+ memset(path, 0, sizeof(path));
+ snprintf(path, sizeof(path), "/proc/%d/fd", tid);
+
+ __igt_lsof_fds(tid, pid_comm, &state, path, dir);
+
+ free(name_lnk);
+ }
+ procps_pids_unref(&info);
+#endif
}
/**
@@ -1490,7 +1579,7 @@ igt_lsof(const char *dpath)
free(sanitized);
}
-static void pulseaudio_unload_module(proc_t *proc_info)
+static void pulseaudio_unload_module(const uid_t euid, const gid_t egid)
{
struct igt_helper_process pa_proc = {};
char xdg_dir[PATH_MAX];
@@ -1498,14 +1587,14 @@ static void pulseaudio_unload_module(proc_t *proc_info)
struct passwd *pw;
igt_fork_helper(&pa_proc) {
- pw = getpwuid(proc_info->euid);
+ pw = getpwuid(euid);
homedir = pw->pw_dir;
- snprintf(xdg_dir, sizeof(xdg_dir), "/run/user/%d", proc_info->euid);
+ snprintf(xdg_dir, sizeof(xdg_dir), "/run/user/%d", euid);
igt_info("Request pulseaudio to stop using audio device\n");
- setgid(proc_info->egid);
- setuid(proc_info->euid);
+ setgid(egid);
+ setuid(euid);
clearenv();
setenv("HOME", homedir, 1);
setenv("XDG_RUNTIME_DIR",xdg_dir, 1);
@@ -1524,10 +1613,13 @@ static void pipewire_reserve_wait(void)
char xdg_dir[PATH_MAX];
const char *homedir;
struct passwd *pw;
- proc_t *proc_info;
- PROCTAB *proc;
+ int tid = 0, euid, egid;
+#ifdef HAVE_LIBPROCPS
igt_fork_helper(&pw_reserve_proc) {
+ proc_t *proc_info;
+ PROCTAB *proc;
+
igt_info("Preventing pipewire-pulse to use the audio drivers\n");
proc = openproc(PROC_FILLCOM | PROC_FILLSTAT | PROC_FILLARG);
@@ -1540,19 +1632,45 @@ static void pipewire_reserve_wait(void)
}
closeproc(proc);
+ tid = proc_info->tid;
+ euid = proc_info->euid;
+ egid = proc_info->egid;
+ freeproc(proc_info);
+#else
+ igt_fork_helper(&pw_reserve_proc) {
+ enum pids_item Items[] = { PIDS_ID_PID, PIDS_ID_EUID, PIDS_ID_EGID };
+ enum rel_items { EU_PID, EU_EUID, EU_EGID };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+
+ igt_info("Preventing pipewire-pulse to use the audio drivers\n");
+
+ if (procps_pids_new(&info, Items, 3) < 0) {
+ igt_info("error getting pids: %d\n", errno);
+ exit(errno);
+ }
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ tid = PIDS_VAL(EU_PID, s_int, stack, info);
+ if (pipewire_pulse_pid == tid)
+ break;
+ }
+ euid = PIDS_VAL(EU_EUID, s_int, stack, info);
+ egid = PIDS_VAL(EU_EGID, s_int, stack, info);
+ procps_pids_unref(&info);
+#endif
+
/* Sanity check: if it can't find the process, it means it has gone */
- if (pipewire_pulse_pid != proc_info->tid)
+ if (pipewire_pulse_pid != tid)
exit(0);
- pw = getpwuid(proc_info->euid);
+ pw = getpwuid(euid);
homedir = pw->pw_dir;
- snprintf(xdg_dir, sizeof(xdg_dir), "/run/user/%d", proc_info->euid);
- setgid(proc_info->egid);
- setuid(proc_info->euid);
+ snprintf(xdg_dir, sizeof(xdg_dir), "/run/user/%d", euid);
+ setgid(egid);
+ setuid(euid);
clearenv();
setenv("HOME", homedir, 1);
setenv("XDG_RUNTIME_DIR",xdg_dir, 1);
- freeproc(proc_info);
/*
* pw-reserve will run in background. It will only exit when
@@ -1570,9 +1688,7 @@ static void pipewire_reserve_wait(void)
int pipewire_pulse_start_reserve(void)
{
bool is_pw_reserve_running = false;
- proc_t *proc_info;
int attempts = 0;
- PROCTAB *proc;
if (!pipewire_pulse_pid)
return 0;
@@ -1584,6 +1700,10 @@ int pipewire_pulse_start_reserve(void)
* pipewire version 0.3.50 or upper.
*/
for (attempts = 0; attempts < PIPEWIRE_RESERVE_MAX_TIME; attempts++) {
+#ifdef HAVE_LIBPROCPS
+ PROCTAB *proc;
+ proc_t *proc_info;
+
usleep(1000);
proc = openproc(PROC_FILLCOM | PROC_FILLSTAT | PROC_FILLARG);
igt_assert(proc != NULL);
@@ -1598,6 +1718,24 @@ int pipewire_pulse_start_reserve(void)
freeproc(proc_info);
}
closeproc(proc);
+#else
+ enum pids_item Items[] = { PIDS_ID_PID, PIDS_CMD };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+
+ usleep(1000);
+
+ if (procps_pids_new(&info, Items, 2) < 0)
+ return 1;
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ if (!strcmp(PIDS_VAL(1, str, stack, info), "pw-reserve")) {
+ is_pw_reserve_running = true;
+ pipewire_pw_reserve_pid = PIDS_VAL(0, s_int, stack, info);
+ break;
+ }
+ }
+ procps_pids_unref(&info);
+#endif
if (is_pw_reserve_running)
break;
}
@@ -1645,7 +1783,7 @@ void pipewire_pulse_stop_reserve(void)
* If the check fails, it means that the process can simply be killed.
*/
static int
-__igt_lsof_audio_and_kill_proc(proc_t *proc_info, char *proc_path)
+__igt_lsof_audio_and_kill_proc(const pid_t tid, const char *cmd, const uid_t euid, const gid_t egid, char *proc_path)
{
const char *audio_dev = "/dev/snd/";
char path[PATH_MAX * 2];
@@ -1670,10 +1808,10 @@ __igt_lsof_audio_and_kill_proc(proc_t *proc_info, char *proc_path)
* 2) unload/unbind the the audio driver(s);
* 3) stop the pw-reserve thread.
*/
- if (!strcmp(proc_info->cmd, "pipewire-pulse")) {
+ if (!strcmp(cmd, "pipewire-pulse")) {
igt_info("process %d (%s) is using audio device. Should be requested to stop using them.\n",
- proc_info->tid, proc_info->cmd);
- pipewire_pulse_pid = proc_info->tid;
+ tid, cmd);
+ pipewire_pulse_pid = tid;
return 0;
}
/*
@@ -1685,9 +1823,9 @@ __igt_lsof_audio_and_kill_proc(proc_t *proc_info, char *proc_path)
* will respawn them. So, just ignore here, they'll honor pw-reserve,
* when the time comes.
*/
- if (!strcmp(proc_info->cmd, "pipewire-media-session"))
+ if (!strcmp(cmd, "pipewire-media-session"))
return 0;
- if (!strcmp(proc_info->cmd, "wireplumber"))
+ if (!strcmp(cmd, "wireplumber"))
return 0;
dp = opendir(proc_path);
@@ -1723,22 +1861,22 @@ __igt_lsof_audio_and_kill_proc(proc_t *proc_info, char *proc_path)
* enough to unbind audio modules and won't cause race issues
* with systemd trying to reload it.
*/
- if (!strcmp(proc_info->cmd, "pulseaudio")) {
- pulseaudio_unload_module(proc_info);
+ if (!strcmp(cmd, "pulseaudio")) {
+ pulseaudio_unload_module(euid, egid);
break;
}
/* For all other processes, just kill them */
igt_info("process %d (%s) is using audio device. Should be terminated.\n",
- proc_info->tid, proc_info->cmd);
+ tid, cmd);
- if (kill(proc_info->tid, SIGTERM) < 0) {
+ if (kill(tid, SIGTERM) < 0) {
igt_info("Fail to terminate %s (pid: %d) with SIGTERM\n",
- proc_info->cmd, proc_info->tid);
- if (kill(proc_info->tid, SIGABRT) < 0) {
+ cmd, tid);
+ if (kill(tid, SIGABRT) < 0) {
fail++;
igt_info("Fail to terminate %s (pid: %d) with SIGABRT\n",
- proc_info->cmd, proc_info->tid);
+ cmd, tid);
}
}
@@ -1760,23 +1898,47 @@ int
igt_lsof_kill_audio_processes(void)
{
char path[PATH_MAX];
+ int fail = 0;
+
+#ifdef HAVE_LIBPROCPS
proc_t *proc_info;
PROCTAB *proc;
- int fail = 0;
proc = openproc(PROC_FILLCOM | PROC_FILLSTAT | PROC_FILLARG);
igt_assert(proc != NULL);
pipewire_pulse_pid = 0;
-
while ((proc_info = readproc(proc, NULL))) {
if (snprintf(path, sizeof(path), "/proc/%d/fd", proc_info->tid) < 1)
fail++;
else
- fail += __igt_lsof_audio_and_kill_proc(proc_info, path);
+ fail += __igt_lsof_audio_and_kill_proc(proc_info->tid, proc_info->cmd, proc_info->euid, proc_info->egid, path);
freeproc(proc_info);
}
closeproc(proc);
+#else
+ enum pids_item Items[] = { PIDS_ID_PID, PIDS_CMD, PIDS_ID_EUID, PIDS_ID_EGID };
+ enum rel_items { EU_PID, EU_CMD, EU_EUID, EU_EGID };
+ struct pids_info *info = NULL;
+ struct pids_stack *stack;
+ pid_t tid;
+
+ if (procps_pids_new(&info, Items, 4) < 0)
+ return 1;
+ while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY))) {
+ tid = PIDS_VAL(EU_PID, s_int, stack, info);
+
+ if (snprintf(path, sizeof(path), "/proc/%d/fd", tid) < 1)
+ fail++;
+ else
+ fail += __igt_lsof_audio_and_kill_proc(tid,
+ PIDS_VAL(EU_CMD, str, stack, info),
+ PIDS_VAL(EU_EUID, s_int, stack, info),
+ PIDS_VAL(EU_EGID, s_int, stack, info),
+ path);
+ }
+ procps_pids_unref(&info);
+#endif
return fail;
}
diff --git a/lib/meson.build b/lib/meson.build
index b21c252b5..48a27a612 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -113,7 +113,6 @@ lib_deps = [
libdrm,
libdw,
libkmod,
- libprocps,
libudev,
math,
pciaccess,
@@ -177,6 +176,12 @@ if chamelium.found()
lib_sources += 'monitor_edids/monitor_edids_helper.c'
endif
+if libprocps.found()
+ lib_deps += libprocps
+else
+ lib_deps += libproc2
+endif
+
if get_option('srcdir') != ''
srcdir = join_paths(get_option('srcdir'), 'tests')
else
diff --git a/meson.build b/meson.build
index 036217844..98acc8daf 100644
--- a/meson.build
+++ b/meson.build
@@ -124,7 +124,15 @@ build_info += 'With libdrm: ' + ','.join(libdrm_info)
pciaccess = dependency('pciaccess', version : '>=0.10')
libkmod = dependency('libkmod')
-libprocps = dependency('libprocps', required : true)
+libprocps = dependency('libprocps', required : false)
+libproc2 = dependency('libproc2', required : false)
+if libprocps.found()
+ config.set('HAVE_LIBPROCPS', 1)
+elif libproc2.found()
+ config.set('HAVE_LIBPROC2', 1)
+else
+ error('Either libprocps or libproc2 is required')
+endif
libunwind = dependency('libunwind', required : get_option('libunwind'))
build_info += 'With libunwind: @0@'.format(libunwind.found())
--
2.39.2
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