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Improve the service timeout code and reduce the timeout to 60 seconds.

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Don't process any dependencies when changing runlevels and called 
outside of RC otherwise we can deadlock.
This commit is contained in:
Roy Marples 2009-04-23 20:20:17 +00:00
parent 953b0b7435
commit 7dc9c39503
1 changed files with 30 additions and 24 deletions
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52
src/rc/runscript.c
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@ -71,13 +71,9 @@
#define PREFIX_LOCK RC_SVCDIR "/prefix.lock" #define PREFIX_LOCK RC_SVCDIR "/prefix.lock"
/* usecs to wait while we poll the fifo */ #define WAIT_INTERVAL 20000000 /* usecs to poll the lock file */
#define WAIT_INTERVAL 20000000 #define WAIT_TIMEOUT 60 /* seconds until we timeout */
#define WARN_TIMEOUT 10 /* warn about this every N seconds */
/* max secs to wait until a service comes up */
#define WAIT_MAX 300
#define ONE_SECOND 1000000000
static const char *applet = NULL; static const char *applet = NULL;
static RC_STRINGLIST *applet_list = NULL; static RC_STRINGLIST *applet_list = NULL;
@ -480,12 +476,10 @@ static bool
svc_wait(const char *svc) svc_wait(const char *svc)
{ {
char file[PATH_MAX]; char file[PATH_MAX];
struct timespec ts;
int nloops = WAIT_MAX * (ONE_SECOND / WAIT_INTERVAL);
int sloops = (ONE_SECOND / WAIT_INTERVAL) * 5;
int fd; int fd;
bool forever = false; bool forever = false;
RC_STRINGLIST *keywords; RC_STRINGLIST *keywords;
struct timespec interval, timeout, warn;
/* Some services don't have a timeout, like fsck */ /* Some services don't have a timeout, like fsck */
keywords = rc_deptree_depend(deptree, svc, "keyword"); keywords = rc_deptree_depend(deptree, svc, "keyword");
@ -495,10 +489,14 @@ svc_wait(const char *svc)
snprintf(file, sizeof(file), RC_SVCDIR "/exclusive/%s", snprintf(file, sizeof(file), RC_SVCDIR "/exclusive/%s",
basename_c(svc)); basename_c(svc));
ts.tv_sec = 0;
ts.tv_nsec = WAIT_INTERVAL;
while (nloops) { interval.tv_sec = 0;
interval.tv_nsec = WAIT_INTERVAL;
timeout.tv_sec = WAIT_TIMEOUT;
timeout.tv_nsec = 0;
warn.tv_sec = WARN_TIMEOUT;
warn.tv_nsec = 0;
for (;;) {
fd = open(file, O_RDONLY | O_NONBLOCK); fd = open(file, O_RDONLY | O_NONBLOCK);
if (fd != -1) { if (fd != -1) {
if (flock(fd, LOCK_SH | LOCK_NB) == 0) { if (flock(fd, LOCK_SH | LOCK_NB) == 0) {
@ -510,23 +508,25 @@ svc_wait(const char *svc)
if (errno == ENOENT) if (errno == ENOENT)
return true; return true;
if (errno != EWOULDBLOCK) if (errno != EWOULDBLOCK)
eerrorx("%s: open `%s': %s", applet, file, strerror(errno)); eerrorx("%s: open `%s': %s", applet, file,
strerror(errno));
if (nanosleep(&ts, NULL) == -1) { if (nanosleep(&interval, NULL) == -1) {
if (errno != EINTR) if (errno != EINTR)
return false; return false;
} }
if (!forever) { if (!forever) {
nloops --; timespecsub(&timeout, &interval, &timeout);
if (timeout.tv_sec <= 0)
if (--sloops == 0) { return false;
ewarn("%s: waiting for %s", applet, svc); timespecsub(&warn, &interval, &warn);
sloops = (ONE_SECOND / WAIT_INTERVAL) * 5; if (warn.tv_sec <= 0) {
ewarn("%s: waiting for %s (%zu)", applet, svc,
timeout.tv_sec);
warn.tv_sec = WARN_TIMEOUT;
warn.tv_nsec = 0;
} }
} }
} }
return false; return false;
} }
@ -1178,6 +1178,12 @@ runscript(int argc, char **argv)
case_RC_COMMON_GETOPT case_RC_COMMON_GETOPT
} }
/* If we're changing runlevels and not called by rc then we cannot
work with any dependencies */
if (deps && getenv("RC_PID") == NULL &&
(rc_runlevel_starting() || rc_runlevel_stopping()))
deps = false;
/* Save the IN_BACKGROUND env flag so it's ONLY passed to the service /* Save the IN_BACKGROUND env flag so it's ONLY passed to the service
that is being called and not any dependents */ that is being called and not any dependents */
if (getenv("IN_BACKGROUND")) { if (getenv("IN_BACKGROUND")) {