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#include "common.h"
#include <sys/mount.h>
struct mount_point {
char *name;
uint32_t hash;
size_t len;
// flags
int configured;
int enabled;
int updated;
int do_space;
int do_inodes;
size_t collected; // the number of times this has been collected
// charts and dimensions
RRDSET *st_space;
RRDDIM *rd_space_used;
RRDDIM *rd_space_avail;
RRDDIM *rd_space_reserved;
RRDSET *st_inodes;
RRDDIM *rd_inodes_used;
RRDDIM *rd_inodes_avail;
struct mount_point *next;
};
static struct mount_point *mount_points_root = NULL, *mount_points_last_used = NULL;
static size_t mount_points_added = 0, mount_points_found = 0;
static void mount_point_free(struct mount_point *m) {
if (likely(m->st_space))
rrdset_is_obsolete(m->st_space);
if (likely(m->st_inodes))
rrdset_is_obsolete(m->st_inodes);
mount_points_added--;
freez(m->name);
freez(m);
}
static void mount_points_cleanup() {
if (likely(mount_points_found == mount_points_added)) return;
struct mount_point *m = mount_points_root, *last = NULL;
while(m) {
if (unlikely(!m->updated)) {
// info("Removing mount point '%s', linked after '%s'", m->name, last?last->name:"ROOT");
if (mount_points_last_used == m)
mount_points_last_used = last;
struct mount_point *t = m;
if (m == mount_points_root || !last)
mount_points_root = m = m->next;
else
last->next = m = m->next;
t->next = NULL;
mount_point_free(t);
}
else {
last = m;
m->updated = 0;
m = m->next;
}
}
}
static struct mount_point *get_mount_point(const char *name) {
struct mount_point *m;
uint32_t hash = simple_hash(name);
// search it, from the last position to the end
for(m = mount_points_last_used ; m ; m = m->next) {
if (unlikely(hash == m->hash && !strcmp(name, m->name))) {
mount_points_last_used = m->next;
return m;
}
}
// search it from the beginning to the last position we used
for(m = mount_points_root ; m != mount_points_last_used ; m = m->next) {
if (unlikely(hash == m->hash && !strcmp(name, m->name))) {
mount_points_last_used = m->next;
return m;
}
}
// create a new one
m = callocz(1, sizeof(struct mount_point));
m->name = strdupz(name);
m->hash = simple_hash(m->name);
m->len = strlen(m->name);
mount_points_added++;
// link it to the end
if (mount_points_root) {
struct mount_point *e;
for(e = mount_points_root; e->next ; e = e->next) ;
e->next = m;
}
else
mount_points_root = m;
return m;
}
// --------------------------------------------------------------------------------------------------------------------
// getmntinfo
int do_getmntinfo(int update_every, usec_t dt) {
(void)dt;
#define DELAULT_EXCLUDED_PATHS "/proc/*"
// taken from gnulib/mountlist.c and shortened to FreeBSD related fstypes
#define DEFAULT_EXCLUDED_FILESYSTEMS "autofs procfs subfs devfs none"
#define CONFIG_SECTION_GETMNTINFO "plugin:freebsd:getmntinfo"
static int enable_new_mount_points = -1;
static int do_space = -1, do_inodes = -1;
static SIMPLE_PATTERN *excluded_mountpoints = NULL;
static SIMPLE_PATTERN *excluded_filesystems = NULL;
if (unlikely(enable_new_mount_points == -1)) {
enable_new_mount_points = config_get_boolean_ondemand(CONFIG_SECTION_GETMNTINFO,
"enable new mount points detected at runtime",
CONFIG_BOOLEAN_AUTO);
do_space = config_get_boolean_ondemand(CONFIG_SECTION_GETMNTINFO, "space usage for all disks", CONFIG_BOOLEAN_AUTO);
do_inodes = config_get_boolean_ondemand(CONFIG_SECTION_GETMNTINFO, "inodes usage for all disks", CONFIG_BOOLEAN_AUTO);
excluded_mountpoints = simple_pattern_create(
config_get(CONFIG_SECTION_GETMNTINFO, "exclude space metrics on paths",
DELAULT_EXCLUDED_PATHS)
, NULL
, SIMPLE_PATTERN_EXACT
);
excluded_filesystems = simple_pattern_create(
config_get(CONFIG_SECTION_GETMNTINFO, "exclude space metrics on filesystems",
DEFAULT_EXCLUDED_FILESYSTEMS)
, NULL
, SIMPLE_PATTERN_EXACT
);
}
if (likely(do_space || do_inodes)) {
struct statfs *mntbuf;
int mntsize;
// there is no mount info in sysctl MIBs
if (unlikely(!(mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)))) {
error("FREEBSD: getmntinfo() failed");
do_space = 0;
error("DISABLED: disk_space.* charts");
do_inodes = 0;
error("DISABLED: disk_inodes.* charts");
error("DISABLED: getmntinfo module");
return 1;
} else {
int i;
mount_points_found = 0;
for (i = 0; i < mntsize; i++) {
char title[4096 + 1];
struct mount_point *m = get_mount_point(mntbuf[i].f_mntonname);
m->updated = 1;
mount_points_found++;
if (unlikely(!m->configured)) {
char var_name[4096 + 1];
// this is the first time we see this filesystem
// remember we configured it
m->configured = 1;
m->enabled = enable_new_mount_points;
if (likely(m->enabled))
m->enabled = !(simple_pattern_matches(excluded_mountpoints, mntbuf[i].f_mntonname)
|| simple_pattern_matches(excluded_filesystems, mntbuf[i].f_fstypename));
snprintfz(var_name, 4096, "%s:%s", CONFIG_SECTION_GETMNTINFO, mntbuf[i].f_mntonname);
m->enabled = config_get_boolean_ondemand(var_name, "enabled", m->enabled);
if (unlikely(m->enabled == CONFIG_BOOLEAN_NO))
continue;
m->do_space = config_get_boolean_ondemand(var_name, "space usage", do_space);
m->do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", do_inodes);
}
if (unlikely(!m->enabled))
continue;
if (unlikely(mntbuf[i].f_flags & MNT_RDONLY && !m->collected))
continue;
// --------------------------------------------------------------------------
int rendered = 0;
if (m->do_space == CONFIG_BOOLEAN_YES || (m->do_space == CONFIG_BOOLEAN_AUTO && (mntbuf[i].f_blocks > 2))) {
if (unlikely(!m->st_space)) {
snprintfz(title, 4096, "Disk Space Usage for %s [%s]",
mntbuf[i].f_mntonname, mntbuf[i].f_mntfromname);
m->st_space = rrdset_create_localhost("disk_space",
mntbuf[i].f_mntonname,
NULL,
mntbuf[i].f_mntonname,
"disk.space",
title,
"GB",
"freebsd",
"getmntinfo",
2023,
update_every,
RRDSET_TYPE_STACKED
);
m->rd_space_avail = rrddim_add(m->st_space, "avail", NULL,
mntbuf[i].f_bsize, GIGA_FACTOR, RRD_ALGORITHM_ABSOLUTE);
m->rd_space_used = rrddim_add(m->st_space, "used", NULL,
mntbuf[i].f_bsize, GIGA_FACTOR, RRD_ALGORITHM_ABSOLUTE);
m->rd_space_reserved = rrddim_add(m->st_space, "reserved_for_root", "reserved for root",
mntbuf[i].f_bsize, GIGA_FACTOR, RRD_ALGORITHM_ABSOLUTE);
} else
rrdset_next(m->st_space);
rrddim_set_by_pointer(m->st_space, m->rd_space_avail, (collected_number) mntbuf[i].f_bavail);
rrddim_set_by_pointer(m->st_space, m->rd_space_used, (collected_number) (mntbuf[i].f_blocks -
mntbuf[i].f_bfree));
rrddim_set_by_pointer(m->st_space, m->rd_space_reserved, (collected_number) (mntbuf[i].f_bfree -
mntbuf[i].f_bavail));
rrdset_done(m->st_space);
rendered++;
}
// --------------------------------------------------------------------------
if (m->do_inodes == CONFIG_BOOLEAN_YES || (m->do_inodes == CONFIG_BOOLEAN_AUTO && (mntbuf[i].f_files > 1))) {
if (unlikely(!m->st_inodes)) {
snprintfz(title, 4096, "Disk Files (inodes) Usage for %s [%s]",
mntbuf[i].f_mntonname, mntbuf[i].f_mntfromname);
m->st_inodes = rrdset_create_localhost("disk_inodes",
mntbuf[i].f_mntonname,
NULL,
mntbuf[i].f_mntonname,
"disk.inodes",
title,
"Inodes",
"freebsd",
"getmntinfo",
2024,
update_every,
RRDSET_TYPE_STACKED
);
m->rd_inodes_avail = rrddim_add(m->st_inodes, "avail", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
m->rd_inodes_used = rrddim_add(m->st_inodes, "used", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
} else
rrdset_next(m->st_inodes);
rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_avail, (collected_number) mntbuf[i].f_ffree);
rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_used, (collected_number) (mntbuf[i].f_files -
mntbuf[i].f_ffree));
rrdset_done(m->st_inodes);
rendered++;
}
if (likely(rendered))
m->collected++;
}
}
} else {
error("DISABLED: getmntinfo module");
return 1;
}
mount_points_cleanup();
return 0;
}
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