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apps_plugin.c
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// SPDX-License-Identifier: GPL-3.0-or-later
/*
* netdata apps.plugin
* (C) Copyright 2016-2017 Costa Tsaousis <[email protected]>
* Released under GPL v3+
*/
#include "../../libnetdata/libnetdata.h"
// ----------------------------------------------------------------------------
// callback required by fatal()
void netdata_cleanup_and_exit(int ret) {
exit(ret);
}
// callbacks required by popen()
void signals_block(void) {};
void signals_unblock(void) {};
void signals_reset(void) {};
// callback required by eval()
int health_variable_lookup(const char *variable, uint32_t hash, struct rrdcalc *rc, calculated_number *result) {
(void)variable;
(void)hash;
(void)rc;
(void)result;
return 0;
};
// required by get_system_cpus()
char *netdata_configured_host_prefix = "";
// ----------------------------------------------------------------------------
// debugging
static int debug_enabled = 0;
static inline void debug_log_int(const char *fmt, ... ) {
va_list args;
fprintf( stderr, "apps.plugin: ");
va_start( args, fmt );
vfprintf( stderr, fmt, args );
va_end( args );
fputc('\n', stderr);
}
#ifdef NETDATA_INTERNAL_CHECKS
#define debug_log(fmt, args...) do { if(unlikely(debug_enabled)) debug_log_int(fmt, ##args); } while(0)
#else
static inline void debug_log_dummy(void) {}
#define debug_log(fmt, args...) debug_log_dummy()
#endif
// ----------------------------------------------------------------------------
#ifdef __FreeBSD__
#include <sys/user.h>
#endif
// ----------------------------------------------------------------------------
// per O/S configuration
// the minimum PID of the system
// this is also the pid of the init process
#define INIT_PID 1
// if the way apps.plugin will work, will read the entire process list,
// including the resource utilization of each process, instantly
// set this to 1
// when set to 0, apps.plugin builds a sort list of processes, in order
// to process children processes, before parent processes
#ifdef __FreeBSD__
#define ALL_PIDS_ARE_READ_INSTANTLY 1
#else
#define ALL_PIDS_ARE_READ_INSTANTLY 0
#endif
// ----------------------------------------------------------------------------
// string lengths
#define MAX_COMPARE_NAME 100
#define MAX_NAME 100
#define MAX_CMDLINE 16384
// ----------------------------------------------------------------------------
// the rates we are going to send to netdata will have this detail a value of:
// - 1 will send just integer parts to netdata
// - 100 will send 2 decimal points
// - 1000 will send 3 decimal points
// etc.
#define RATES_DETAIL 10000ULL
// ----------------------------------------------------------------------------
// factor for calculating correct CPU time values depending on units of raw data
static unsigned int time_factor = 0;
// ----------------------------------------------------------------------------
// to avoid reallocating too frequently, we can increase the number of spare
// file descriptors used by processes.
// IMPORTANT:
// having a lot of spares, increases the CPU utilization of the plugin.
#define MAX_SPARE_FDS 1
// ----------------------------------------------------------------------------
// command line options
static int
update_every = 1,
enable_guest_charts = 0,
#ifdef __FreeBSD__
enable_file_charts = 0,
#else
enable_file_charts = 1,
max_fds_cache_seconds = 60,
#endif
enable_users_charts = 1,
enable_groups_charts = 1,
include_exited_childs = 1;
// will be changed to getenv(NETDATA_USER_CONFIG_DIR) if it exists
static char *user_config_dir = CONFIG_DIR;
static char *stock_config_dir = LIBCONFIG_DIR;
// ----------------------------------------------------------------------------
// internal flags
// handled in code (automatically set)
static int
show_guest_time = 0, // 1 when guest values are collected
show_guest_time_old = 0,
proc_pid_cmdline_is_needed = 0; // 1 when we need to read /proc/cmdline
// ----------------------------------------------------------------------------
// internal counters
static size_t
global_iterations_counter = 1,
calls_counter = 0,
file_counter = 0,
filenames_allocated_counter = 0,
inodes_changed_counter = 0,
links_changed_counter = 0,
targets_assignment_counter = 0;
// ----------------------------------------------------------------------------
// Normalization
//
// With normalization we lower the collected metrics by a factor to make them
// match the total utilization of the system.
// The discrepancy exists because apps.plugin needs some time to collect all
// the metrics. This results in utilization that exceeds the total utilization
// of the system.
//
// With normalization we align the per-process utilization, to the total of
// the system. We first consume the exited children utilization and it the
// collected values is above the total, we proportionally scale each reported
// metric.
// the total system time, as reported by /proc/stat
static kernel_uint_t
global_utime = 0,
global_stime = 0,
global_gtime = 0;
// the normalization ratios, as calculated by normalize_utilization()
double utime_fix_ratio = 1.0,
stime_fix_ratio = 1.0,
gtime_fix_ratio = 1.0,
minflt_fix_ratio = 1.0,
majflt_fix_ratio = 1.0,
cutime_fix_ratio = 1.0,
cstime_fix_ratio = 1.0,
cgtime_fix_ratio = 1.0,
cminflt_fix_ratio = 1.0,
cmajflt_fix_ratio = 1.0;
// ----------------------------------------------------------------------------
// target
//
// target is the structure that processes are aggregated to be reported
// to netdata.
//
// - Each entry in /etc/apps_groups.conf creates a target.
// - Each user and group used by a process in the system, creates a target.
struct target {
char compare[MAX_COMPARE_NAME + 1];
uint32_t comparehash;
size_t comparelen;
char id[MAX_NAME + 1];
uint32_t idhash;
char name[MAX_NAME + 1];
uid_t uid;
gid_t gid;
kernel_uint_t minflt;
kernel_uint_t cminflt;
kernel_uint_t majflt;
kernel_uint_t cmajflt;
kernel_uint_t utime;
kernel_uint_t stime;
kernel_uint_t gtime;
kernel_uint_t cutime;
kernel_uint_t cstime;
kernel_uint_t cgtime;
kernel_uint_t num_threads;
// kernel_uint_t rss;
kernel_uint_t status_vmsize;
kernel_uint_t status_vmrss;
kernel_uint_t status_vmshared;
kernel_uint_t status_rssfile;
kernel_uint_t status_rssshmem;
kernel_uint_t status_vmswap;
kernel_uint_t io_logical_bytes_read;
kernel_uint_t io_logical_bytes_written;
// kernel_uint_t io_read_calls;
// kernel_uint_t io_write_calls;
kernel_uint_t io_storage_bytes_read;
kernel_uint_t io_storage_bytes_written;
// kernel_uint_t io_cancelled_write_bytes;
int *target_fds;
int target_fds_size;
kernel_uint_t openfiles;
kernel_uint_t openpipes;
kernel_uint_t opensockets;
kernel_uint_t openinotifies;
kernel_uint_t openeventfds;
kernel_uint_t opentimerfds;
kernel_uint_t opensignalfds;
kernel_uint_t openeventpolls;
kernel_uint_t openother;
unsigned int processes; // how many processes have been merged to this
int exposed; // if set, we have sent this to netdata
int hidden; // if set, we set the hidden flag on the dimension
int debug_enabled;
int ends_with;
int starts_with; // if set, the compare string matches only the
// beginning of the command
struct target *target; // the one that will be reported to netdata
struct target *next;
};
struct target
*apps_groups_default_target = NULL, // the default target
*apps_groups_root_target = NULL, // apps_groups.conf defined
*users_root_target = NULL, // users
*groups_root_target = NULL; // user groups
size_t
apps_groups_targets_count = 0; // # of apps_groups.conf targets
// ----------------------------------------------------------------------------
// pid_stat
//
// structure to store data for each process running
// see: man proc for the description of the fields
struct pid_fd {
int fd;
#ifndef __FreeBSD__
ino_t inode;
char *filename;
uint32_t link_hash;
size_t cache_iterations_counter;
size_t cache_iterations_reset;
#endif
};
struct pid_stat {
int32_t pid;
char comm[MAX_COMPARE_NAME + 1];
char *cmdline;
uint32_t log_thrown;
// char state;
int32_t ppid;
// int32_t pgrp;
// int32_t session;
// int32_t tty_nr;
// int32_t tpgid;
// uint64_t flags;
// these are raw values collected
kernel_uint_t minflt_raw;
kernel_uint_t cminflt_raw;
kernel_uint_t majflt_raw;
kernel_uint_t cmajflt_raw;
kernel_uint_t utime_raw;
kernel_uint_t stime_raw;
kernel_uint_t gtime_raw; // guest_time
kernel_uint_t cutime_raw;
kernel_uint_t cstime_raw;
kernel_uint_t cgtime_raw; // cguest_time
// these are rates
kernel_uint_t minflt;
kernel_uint_t cminflt;
kernel_uint_t majflt;
kernel_uint_t cmajflt;
kernel_uint_t utime;
kernel_uint_t stime;
kernel_uint_t gtime;
kernel_uint_t cutime;
kernel_uint_t cstime;
kernel_uint_t cgtime;
// int64_t priority;
// int64_t nice;
int32_t num_threads;
// int64_t itrealvalue;
// kernel_uint_t starttime;
// kernel_uint_t vsize;
// kernel_uint_t rss;
// kernel_uint_t rsslim;
// kernel_uint_t starcode;
// kernel_uint_t endcode;
// kernel_uint_t startstack;
// kernel_uint_t kstkesp;
// kernel_uint_t kstkeip;
// uint64_t signal;
// uint64_t blocked;
// uint64_t sigignore;
// uint64_t sigcatch;
// uint64_t wchan;
// uint64_t nswap;
// uint64_t cnswap;
// int32_t exit_signal;
// int32_t processor;
// uint32_t rt_priority;
// uint32_t policy;
// kernel_uint_t delayacct_blkio_ticks;
uid_t uid;
gid_t gid;
kernel_uint_t status_vmsize;
kernel_uint_t status_vmrss;
kernel_uint_t status_vmshared;
kernel_uint_t status_rssfile;
kernel_uint_t status_rssshmem;
kernel_uint_t status_vmswap;
#ifndef __FreeBSD__
ARL_BASE *status_arl;
#endif
kernel_uint_t io_logical_bytes_read_raw;
kernel_uint_t io_logical_bytes_written_raw;
// kernel_uint_t io_read_calls_raw;
// kernel_uint_t io_write_calls_raw;
kernel_uint_t io_storage_bytes_read_raw;
kernel_uint_t io_storage_bytes_written_raw;
// kernel_uint_t io_cancelled_write_bytes_raw;
kernel_uint_t io_logical_bytes_read;
kernel_uint_t io_logical_bytes_written;
// kernel_uint_t io_read_calls;
// kernel_uint_t io_write_calls;
kernel_uint_t io_storage_bytes_read;
kernel_uint_t io_storage_bytes_written;
// kernel_uint_t io_cancelled_write_bytes;
struct pid_fd *fds; // array of fds it uses
size_t fds_size; // the size of the fds array
int children_count; // number of processes directly referencing this
unsigned char keep:1; // 1 when we need to keep this process in memory even after it exited
int keeploops; // increases by 1 every time keep is 1 and updated 0
unsigned char updated:1; // 1 when the process is currently running
unsigned char merged:1; // 1 when it has been merged to its parent
unsigned char read:1; // 1 when we have already read this process for this iteration
int sortlist; // higher numbers = top on the process tree
// each process gets a unique number
struct target *target; // app_groups.conf targets
struct target *user_target; // uid based targets
struct target *group_target; // gid based targets
usec_t stat_collected_usec;
usec_t last_stat_collected_usec;
usec_t io_collected_usec;
usec_t last_io_collected_usec;
char *fds_dirname; // the full directory name in /proc/PID/fd
char *stat_filename;
char *status_filename;
char *io_filename;
char *cmdline_filename;
struct pid_stat *parent;
struct pid_stat *prev;
struct pid_stat *next;
};
size_t pagesize;
// log each problem once per process
// log flood protection flags (log_thrown)
#define PID_LOG_IO 0x00000001
#define PID_LOG_STATUS 0x00000002
#define PID_LOG_CMDLINE 0x00000004
#define PID_LOG_FDS 0x00000008
#define PID_LOG_STAT 0x00000010
static struct pid_stat
*root_of_pids = NULL, // global list of all processes running
**all_pids = NULL; // to avoid allocations, we pre-allocate the
// the entire pid space.
static size_t
all_pids_count = 0; // the number of processes running
#if (ALL_PIDS_ARE_READ_INSTANTLY == 0)
// Another pre-allocated list of all possible pids.
// We need it to pids and assign them a unique sortlist id, so that we
// read parents before children. This is needed to prevent a situation where
// a child is found running, but until we read its parent, it has exited and
// its parent has accumulated its resources.
static pid_t
*all_pids_sortlist = NULL;
#endif
// ----------------------------------------------------------------------------
// file descriptor
//
// this is used to keep a global list of all open files of the system.
// it is needed in order to calculate the unique files processes have open.
#define FILE_DESCRIPTORS_INCREASE_STEP 100
// types for struct file_descriptor->type
typedef enum fd_filetype {
FILETYPE_OTHER,
FILETYPE_FILE,
FILETYPE_PIPE,
FILETYPE_SOCKET,
FILETYPE_INOTIFY,
FILETYPE_EVENTFD,
FILETYPE_EVENTPOLL,
FILETYPE_TIMERFD,
FILETYPE_SIGNALFD
} FD_FILETYPE;
struct file_descriptor {
avl avl;
#ifdef NETDATA_INTERNAL_CHECKS
uint32_t magic;
#endif /* NETDATA_INTERNAL_CHECKS */
const char *name;
uint32_t hash;
FD_FILETYPE type;
int count;
int pos;
} *all_files = NULL;
static int
all_files_len = 0,
all_files_size = 0;
// ----------------------------------------------------------------------------
// apps_groups.conf
// aggregate all processes in groups, to have a limited number of dimensions
static struct target *get_users_target(uid_t uid) {
struct target *w;
for(w = users_root_target ; w ; w = w->next)
if(w->uid == uid) return w;
w = callocz(sizeof(struct target), 1);
snprintfz(w->compare, MAX_COMPARE_NAME, "%u", uid);
w->comparehash = simple_hash(w->compare);
w->comparelen = strlen(w->compare);
snprintfz(w->id, MAX_NAME, "%u", uid);
w->idhash = simple_hash(w->id);
struct passwd *pw = getpwuid(uid);
if(!pw || !pw->pw_name || !*pw->pw_name)
snprintfz(w->name, MAX_NAME, "%u", uid);
else
snprintfz(w->name, MAX_NAME, "%s", pw->pw_name);
netdata_fix_chart_name(w->name);
w->uid = uid;
w->next = users_root_target;
users_root_target = w;
debug_log("added uid %u ('%s') target", w->uid, w->name);
return w;
}
struct target *get_groups_target(gid_t gid)
{
struct target *w;
for(w = groups_root_target ; w ; w = w->next)
if(w->gid == gid) return w;
w = callocz(sizeof(struct target), 1);
snprintfz(w->compare, MAX_COMPARE_NAME, "%u", gid);
w->comparehash = simple_hash(w->compare);
w->comparelen = strlen(w->compare);
snprintfz(w->id, MAX_NAME, "%u", gid);
w->idhash = simple_hash(w->id);
struct group *gr = getgrgid(gid);
if(!gr || !gr->gr_name || !*gr->gr_name)
snprintfz(w->name, MAX_NAME, "%u", gid);
else
snprintfz(w->name, MAX_NAME, "%s", gr->gr_name);
netdata_fix_chart_name(w->name);
w->gid = gid;
w->next = groups_root_target;
groups_root_target = w;
debug_log("added gid %u ('%s') target", w->gid, w->name);
return w;
}
// find or create a new target
// there are targets that are just aggregated to other target (the second argument)
static struct target *get_apps_groups_target(const char *id, struct target *target, const char *name) {
int tdebug = 0, thidden = target?target->hidden:0, ends_with = 0;
const char *nid = id;
// extract the options
while(nid[0] == '-' || nid[0] == '+' || nid[0] == '*') {
if(nid[0] == '-') thidden = 1;
if(nid[0] == '+') tdebug = 1;
if(nid[0] == '*') ends_with = 1;
nid++;
}
uint32_t hash = simple_hash(id);
// find if it already exists
struct target *w, *last = apps_groups_root_target;
for(w = apps_groups_root_target ; w ; w = w->next) {
if(w->idhash == hash && strncmp(nid, w->id, MAX_NAME) == 0)
return w;
last = w;
}
// find an existing target
if(unlikely(!target)) {
while(*name == '-') {
if(*name == '-') thidden = 1;
name++;
}
for(target = apps_groups_root_target ; target != NULL ; target = target->next) {
if(!target->target && strcmp(name, target->name) == 0)
break;
}
if(unlikely(debug_enabled)) {
if(unlikely(target))
debug_log("REUSING TARGET NAME '%s' on ID '%s'", target->name, target->id);
else
debug_log("NEW TARGET NAME '%s' on ID '%s'", name, id);
}
}
if(target && target->target)
fatal("Internal Error: request to link process '%s' to target '%s' which is linked to target '%s'", id, target->id, target->target->id);
w = callocz(sizeof(struct target), 1);
strncpyz(w->id, nid, MAX_NAME);
w->idhash = simple_hash(w->id);
if(unlikely(!target))
// copy the name
strncpyz(w->name, name, MAX_NAME);
else
// copy the id
strncpyz(w->name, nid, MAX_NAME);
strncpyz(w->compare, nid, MAX_COMPARE_NAME);
size_t len = strlen(w->compare);
if(w->compare[len - 1] == '*') {
w->compare[len - 1] = '\0';
w->starts_with = 1;
}
w->ends_with = ends_with;
if(w->starts_with && w->ends_with)
proc_pid_cmdline_is_needed = 1;
w->comparehash = simple_hash(w->compare);
w->comparelen = strlen(w->compare);
w->hidden = thidden;
#ifdef NETDATA_INTERNAL_CHECKS
w->debug_enabled = tdebug;
#else
if(tdebug)
fprintf(stderr, "apps.plugin has been compiled without debugging\n");
#endif
w->target = target;
// append it, to maintain the order in apps_groups.conf
if(last) last->next = w;
else apps_groups_root_target = w;
debug_log("ADDING TARGET ID '%s', process name '%s' (%s), aggregated on target '%s', options: %s %s"
, w->id
, w->compare, (w->starts_with && w->ends_with)?"substring":((w->starts_with)?"prefix":((w->ends_with)?"suffix":"exact"))
, w->target?w->target->name:w->name
, (w->hidden)?"hidden":"-"
, (w->debug_enabled)?"debug":"-"
);
return w;
}
// read the apps_groups.conf file
static int read_apps_groups_conf(const char *path, const char *file)
{
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/apps_%s.conf", path, file);
debug_log("process groups file: '%s'", filename);
// ----------------------------------------
procfile *ff = procfile_open(filename, " :\t", PROCFILE_FLAG_DEFAULT);
if(!ff) return 1;
procfile_set_quotes(ff, "'\"");
ff = procfile_readall(ff);
if(!ff)
return 1;
size_t line, lines = procfile_lines(ff);
for(line = 0; line < lines ;line++) {
size_t word, words = procfile_linewords(ff, line);
if(!words) continue;
char *name = procfile_lineword(ff, line, 0);
if(!name || !*name) continue;
// find a possibly existing target
struct target *w = NULL;
// loop through all words, skipping the first one (the name)
for(word = 0; word < words ;word++) {
char *s = procfile_lineword(ff, line, word);
if(!s || !*s) continue;
if(*s == '#') break;
// is this the first word? skip it
if(s == name) continue;
// add this target
struct target *n = get_apps_groups_target(s, w, name);
if(!n) {
error("Cannot create target '%s' (line %zu, word %zu)", s, line, word);
continue;
}
// just some optimization
// to avoid searching for a target for each process
if(!w) w = n->target?n->target:n;
}
}
procfile_close(ff);
apps_groups_default_target = get_apps_groups_target("p+!o@w#e$i^r&7*5(-i)l-o_", NULL, "other"); // match nothing
if(!apps_groups_default_target)
fatal("Cannot create default target");
// allow the user to override group 'other'
if(apps_groups_default_target->target)
apps_groups_default_target = apps_groups_default_target->target;
return 0;
}
// ----------------------------------------------------------------------------
// struct pid_stat management
static inline void init_pid_fds(struct pid_stat *p, size_t first, size_t size);
static inline struct pid_stat *get_pid_entry(pid_t pid) {
if(unlikely(all_pids[pid]))
return all_pids[pid];
struct pid_stat *p = callocz(sizeof(struct pid_stat), 1);
p->fds = mallocz(sizeof(struct pid_fd) * MAX_SPARE_FDS);
p->fds_size = MAX_SPARE_FDS;
init_pid_fds(p, 0, p->fds_size);
if(likely(root_of_pids))
root_of_pids->prev = p;
p->next = root_of_pids;
root_of_pids = p;
p->pid = pid;
all_pids[pid] = p;
all_pids_count++;
return p;
}
static inline void del_pid_entry(pid_t pid) {
struct pid_stat *p = all_pids[pid];
if(unlikely(!p)) {
error("attempted to free pid %d that is not allocated.", pid);
return;
}
debug_log("process %d %s exited, deleting it.", pid, p->comm);
if(root_of_pids == p)
root_of_pids = p->next;
if(p->next) p->next->prev = p->prev;
if(p->prev) p->prev->next = p->next;
// free the filename
#ifndef __FreeBSD__
{
size_t i;
for(i = 0; i < p->fds_size; i++)
if(p->fds[i].filename)
freez(p->fds[i].filename);
}
#endif
freez(p->fds);
freez(p->fds_dirname);
freez(p->stat_filename);
freez(p->status_filename);
#ifndef __FreeBSD__
arl_free(p->status_arl);
#endif
freez(p->io_filename);
freez(p->cmdline_filename);
freez(p->cmdline);
freez(p);
all_pids[pid] = NULL;
all_pids_count--;
}
// ----------------------------------------------------------------------------
static inline int managed_log(struct pid_stat *p, uint32_t log, int status) {
if(unlikely(!status)) {
// error("command failed log %u, errno %d", log, errno);
if(unlikely(debug_enabled || errno != ENOENT)) {
if(unlikely(debug_enabled || !(p->log_thrown & log))) {
p->log_thrown |= log;
switch(log) {
case PID_LOG_IO:
#ifdef __FreeBSD__
error("Cannot fetch process %d I/O info (command '%s')", p->pid, p->comm);
#else
error("Cannot process %s/proc/%d/io (command '%s')", netdata_configured_host_prefix, p->pid, p->comm);
#endif
break;
case PID_LOG_STATUS:
#ifdef __FreeBSD__
error("Cannot fetch process %d status info (command '%s')", p->pid, p->comm);
#else
error("Cannot process %s/proc/%d/status (command '%s')", netdata_configured_host_prefix, p->pid, p->comm);
#endif
break;
case PID_LOG_CMDLINE:
#ifdef __FreeBSD__
error("Cannot fetch process %d command line (command '%s')", p->pid, p->comm);
#else
error("Cannot process %s/proc/%d/cmdline (command '%s')", netdata_configured_host_prefix, p->pid, p->comm);
#endif
break;
case PID_LOG_FDS:
#ifdef __FreeBSD__
error("Cannot fetch process %d files (command '%s')", p->pid, p->comm);
#else
error("Cannot process entries in %s/proc/%d/fd (command '%s')", netdata_configured_host_prefix, p->pid, p->comm);
#endif
break;
case PID_LOG_STAT:
break;
default:
error("unhandled error for pid %d, command '%s'", p->pid, p->comm);
break;
}
}
}
errno = 0;
}
else if(unlikely(p->log_thrown & log)) {
// error("unsetting log %u on pid %d", log, p->pid);
p->log_thrown &= ~log;
}
return status;
}
static inline void assign_target_to_pid(struct pid_stat *p) {
targets_assignment_counter++;
uint32_t hash = simple_hash(p->comm);
size_t pclen = strlen(p->comm);
struct target *w;
for(w = apps_groups_root_target; w ; w = w->next) {
// if(debug_enabled || (p->target && p->target->debug_enabled)) debug_log_int("\t\tcomparing '%s' with '%s'", w->compare, p->comm);
// find it - 4 cases:
// 1. the target is not a pattern
// 2. the target has the prefix
// 3. the target has the suffix
// 4. the target is something inside cmdline
if(unlikely(( (!w->starts_with && !w->ends_with && w->comparehash == hash && !strcmp(w->compare, p->comm))
|| (w->starts_with && !w->ends_with && !strncmp(w->compare, p->comm, w->comparelen))
|| (!w->starts_with && w->ends_with && pclen >= w->comparelen && !strcmp(w->compare, &p->comm[pclen - w->comparelen]))
|| (proc_pid_cmdline_is_needed && w->starts_with && w->ends_with && p->cmdline && strstr(p->cmdline, w->compare))
))) {
if(w->target) p->target = w->target;
else p->target = w;
if(debug_enabled || (p->target && p->target->debug_enabled))
debug_log_int("%s linked to target %s", p->comm, p->target->name);
break;
}
}
}
// ----------------------------------------------------------------------------
// update pids from proc
static inline int read_proc_pid_cmdline(struct pid_stat *p) {
static char cmdline[MAX_CMDLINE + 1];
#ifdef __FreeBSD__
size_t i, bytes = MAX_CMDLINE;
int mib[4];
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_ARGS;
mib[3] = p->pid;
if (unlikely(sysctl(mib, 4, cmdline, &bytes, NULL, 0)))
goto cleanup;
#else
if(unlikely(!p->cmdline_filename)) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s/proc/%d/cmdline", netdata_configured_host_prefix, p->pid);
p->cmdline_filename = strdupz(filename);
}
int fd = open(p->cmdline_filename, procfile_open_flags, 0666);
if(unlikely(fd == -1)) goto cleanup;
ssize_t i, bytes = read(fd, cmdline, MAX_CMDLINE);
close(fd);
if(unlikely(bytes < 0)) goto cleanup;
#endif
cmdline[bytes] = '\0';
for(i = 0; i < bytes ; i++) {
if(unlikely(!cmdline[i])) cmdline[i] = ' ';
}
if(p->cmdline) freez(p->cmdline);
p->cmdline = strdupz(cmdline);
debug_log("Read file '%s' contents: %s", p->cmdline_filename, p->cmdline);
return 1;
cleanup:
// copy the command to the command line
if(p->cmdline) freez(p->cmdline);
p->cmdline = strdupz(p->comm);
return 0;
}
// ----------------------------------------------------------------------------
// macro to calculate the incremental rate of a value
// each parameter is accessed only ONCE - so it is safe to pass function calls
// or other macros as parameters
#define incremental_rate(rate_variable, last_kernel_variable, new_kernel_value, collected_usec, last_collected_usec) { \
kernel_uint_t _new_tmp = new_kernel_value; \
(rate_variable) = (_new_tmp - (last_kernel_variable)) * (USEC_PER_SEC * RATES_DETAIL) / ((collected_usec) - (last_collected_usec)); \
(last_kernel_variable) = _new_tmp; \
}
// the same macro for struct pid members
#define pid_incremental_rate(type, var, value) \
incremental_rate(var, var##_raw, value, p->type##_collected_usec, p->last_##type##_collected_usec)
// ----------------------------------------------------------------------------
#ifndef __FreeBSD__
struct arl_callback_ptr {
struct pid_stat *p;
procfile *ff;
size_t line;
};
void arl_callback_status_uid(const char *name, uint32_t hash, const char *value, void *dst) {
(void)name; (void)hash; (void)value;
struct arl_callback_ptr *aptr = (struct arl_callback_ptr *)dst;
if(unlikely(procfile_linewords(aptr->ff, aptr->line) < 5)) return;
//const char *real_uid = procfile_lineword(aptr->ff, aptr->line, 1);
const char *effective_uid = procfile_lineword(aptr->ff, aptr->line, 2);
//const char *saved_uid = procfile_lineword(aptr->ff, aptr->line, 3);
//const char *filesystem_uid = procfile_lineword(aptr->ff, aptr->line, 4);
if(likely(effective_uid && *effective_uid))
aptr->p->uid = (uid_t)str2l(effective_uid);
}
void arl_callback_status_gid(const char *name, uint32_t hash, const char *value, void *dst) {
(void)name; (void)hash; (void)value;
struct arl_callback_ptr *aptr = (struct arl_callback_ptr *)dst;
if(unlikely(procfile_linewords(aptr->ff, aptr->line) < 5)) return;
//const char *real_gid = procfile_lineword(aptr->ff, aptr->line, 1);
const char *effective_gid = procfile_lineword(aptr->ff, aptr->line, 2);
//const char *saved_gid = procfile_lineword(aptr->ff, aptr->line, 3);
//const char *filesystem_gid = procfile_lineword(aptr->ff, aptr->line, 4);
if(likely(effective_gid && *effective_gid))
aptr->p->gid = (uid_t)str2l(effective_gid);
}
void arl_callback_status_vmsize(const char *name, uint32_t hash, const char *value, void *dst) {
(void)name; (void)hash; (void)value;
struct arl_callback_ptr *aptr = (struct arl_callback_ptr *)dst;
if(unlikely(procfile_linewords(aptr->ff, aptr->line) < 3)) return;
aptr->p->status_vmsize = str2kernel_uint_t(procfile_lineword(aptr->ff, aptr->line, 1));
}
void arl_callback_status_vmswap(const char *name, uint32_t hash, const char *value, void *dst) {
(void)name; (void)hash; (void)value;
struct arl_callback_ptr *aptr = (struct arl_callback_ptr *)dst;
if(unlikely(procfile_linewords(aptr->ff, aptr->line) < 3)) return;
aptr->p->status_vmswap = str2kernel_uint_t(procfile_lineword(aptr->ff, aptr->line, 1));