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brctl: code shrink

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packed_usage                                       33253   33255      +2
write_uint                                            96      90      -6
show_bridge_timer                                     93      69     -24
brctl_main                                          2338    2235    -103
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 2/-133)           Total: -131 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-10-12 19:24:38 +02:00
parent 6dcf563633
commit 3398753818
1 changed files with 28 additions and 32 deletions
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60
networking/brctl.c
View File

@ -54,7 +54,7 @@
//usage: "\n delif BRIDGE IFACE Delete IFACE from BRIDGE"
//usage: IF_FEATURE_BRCTL_FANCY(
//usage: "\n stp BRIDGE 1/yes/on|0/no/off STP on/off"
//usage: "\n showstp BRIDGE Show stp info"
//usage: "\n showstp BRIDGE Show STP info"
//usage: "\n setageing BRIDGE SECONDS Set ageing time"
//usage: "\n setfd BRIDGE SECONDS Set bridge forward delay"
//usage: "\n sethello BRIDGE SECONDS Set hello time"
@ -67,7 +67,6 @@
// Not yet implemented:
// hairpin BRIDGE IFACE on|off Hairpin on/off
#include "libbb.h"
#include "common_bufsiz.h"
#include <linux/sockios.h>
@ -130,7 +129,7 @@ static int show_bridge(const char *name, int need_hdr)
*bridge name bridge id STP enabled interfaces
*br0 8000.000000000000 no eth0
*/
char pathbuf[IFNAMSIZ + sizeof("/bridge/bridge_id") + 32];
char pathbuf[IFNAMSIZ + sizeof("/bridge/bridge_id") + 8];
int tabs;
DIR *ifaces;
struct dirent *ent;
@ -194,7 +193,11 @@ static void write_uint(const char *name, const char *leaf, unsigned val)
n = sprintf(filedata, "%u\n", val);
if (write(fd, filedata, n) < 0)
bb_simple_perror_msg_and_die(name);
close(fd);
/* So far all callers exit very soon after calling us.
* Do not bother closing fd (unless debugging):
*/
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
}
struct fdb_entry {
@ -217,15 +220,18 @@ static int compare_fdbs(const void *_f0, const void *_f1)
static size_t read_bridge_forward_db(const char *name, struct fdb_entry **_fdb)
{
char pathbuf[IFNAMSIZ + sizeof("/brforward") + 8];
struct fdb_entry *fdb;
size_t nentries;
char *path;
int fd;
ssize_t cc;
path = concat_path_file(name, "brforward");
fd = open(path, O_RDONLY);
free(path);
#if IFNAMSIZ == 16
sprintf(pathbuf, "%.16s/brforward", name);
#else
sprintf(pathbuf, "%.*s/brforward", (int)IFNAMSIZ, name);
#endif
fd = open(pathbuf, O_RDONLY);
if (fd < 0)
bb_error_msg_and_die("bridge %s does not exist", name);
@ -243,7 +249,8 @@ static size_t read_bridge_forward_db(const char *name, struct fdb_entry **_fdb)
++nentries;
}
close(fd);
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
qsort(fdb, nentries, sizeof(*fdb), compare_fdbs);
@ -262,9 +269,8 @@ static void show_bridge_macs(const char *name)
printf("port no\tmac addr\t\tis local?\tageing timer\n");
for (i = 0; i < nentries; ++i) {
const struct fdb_entry *f = &fdb[i];
unsigned long tvmsec = 10UL * f->ageing_timer_value;
unsigned tv_sec = tvmsec / 1000;
unsigned tv_msec = tvmsec % 1000;
unsigned tv_sec = f->ageing_timer_value / 100;
unsigned tv_csec = f->ageing_timer_value % 100;
printf("%3u\t"
"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x\t"
"%s\t\t"
@ -273,25 +279,26 @@ static void show_bridge_macs(const char *name)
f->mac_addr[0], f->mac_addr[1], f->mac_addr[2],
f->mac_addr[3], f->mac_addr[4], f->mac_addr[5],
(f->is_local ? "yes" : "no"),
tv_sec, tv_msec / 10
tv_sec, tv_csec
);
}
free(fdb);
if (ENABLE_FEATURE_CLEAN_UP)
free(fdb);
}
static void show_bridge_timer(const char *msg)
{
unsigned long long tvmsec = 10 * xstrtoull(filedata, 0);
unsigned tv_sec = tvmsec / 1000;
unsigned tv_msec = tvmsec % 1000;
printf("%s%4u.%.2u", msg, tv_sec, tv_msec / 10);
unsigned long long centisec = xstrtoull(filedata, 0);
unsigned tv_sec = centisec / 100;
unsigned tv_csec = centisec % 100;
printf("%s%4u.%.2u", msg, tv_sec, tv_csec);
}
static const char *show_bridge_state(unsigned state)
{
/* See linux/if_bridge.h, BR_STATE_ constants */
static const char state_names[] =
static const char state_names[] ALIGN1 =
"disabled\0" //BR_STATE_DISABLED 0
"listening\0" //BR_STATE_LISTENING 1
"learning\0" //BR_STATE_LEARNING 2
@ -310,7 +317,7 @@ static void printf_xstrtou(const char *fmt)
static void show_bridge_port(const char *name)
{
char pathbuf[IFNAMSIZ + sizeof("/brport/forward_delay_timer") + 32];
char pathbuf[IFNAMSIZ + sizeof("/brport/forward_delay_timer") + 8];
char *sfx;
#if IFNAMSIZ == 16
@ -407,7 +414,7 @@ static void show_bridge_ports(const char *name)
static void show_bridge_stp(const char *name)
{
char pathbuf[IFNAMSIZ + sizeof("/bridge/topology_change_timer") + 32];
char pathbuf[IFNAMSIZ + sizeof("/bridge/topology_change_timer") + 8];
char *sfx;
#if IFNAMSIZ == 16
@ -614,7 +621,6 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
bb_error_msg_and_die(bb_msg_invalid_arg_to, *argv, applet_name);
onoff = (unsigned)onoff / 4;
write_uint(br, "bridge/stp_state", onoff);
//goto done_next_argv;
return EXIT_SUCCESS;
}
@ -634,13 +640,11 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
),
str_to_jiffies(*argv)
);
//goto done_next_argv;
return EXIT_SUCCESS;
}
if (key == ARG_setbridgeprio) {
write_uint(br, "bridge/priority", xatoi_positive(*argv));
//goto done_next_argv;
return EXIT_SUCCESS;
}
@ -663,8 +667,6 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
),
xatoi_positive(argv[1])
);
//argv++;
//goto done_next_argv;
return EXIT_SUCCESS;
}
#endif
@ -682,16 +684,10 @@ int brctl_main(int argc UNUSED_PARAM, char **argv)
key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF,
&ifr, "bridge %s", br
);
//close(fd);
//goto done_next_argv;
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
return EXIT_SUCCESS;
}
// done_next_argv:
// argv++;
// done:
}
return EXIT_SUCCESS;