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e071c2a610
If pre-dump-notify flag is set, zdtm sends a notify to the test after
pre-dump was finished and waits for the test to send back a reply that
test did all it's work and now is ready for a next pre-dump/dump.
How it can be used:
while (!test_wait_pre_dump()) {
/* Do something after predump */
test_wait_pre_dump_ack();
}
/* Do something after restore */
Internally we open two pipes for the test one for receiving notify (with
two open ends) and one for replying to it (only write end open). Fds of
pipes are dupped to predefined numbers and zdtm opens these fds through
/proc/<test-pid>/fd/{100,101} and communicates with the test.
v9: switch to two way interface to remove race then operation we try to
run after predump may be yet unfinished at the time of next dump.
Suggested-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
17 lines
310 B
C
17 lines
310 B
C
#ifndef __ZDTM_NS__
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#define __ZDTM_NS__
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#include "lock.h"
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extern futex_t sig_received;
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extern char *pidfile;
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extern void ns_create(int argc, char **argv);
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extern int ns_init(int argc, char **argv);
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extern void test_waitsig(void);
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extern void parseargs(int, char **);
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extern int init_notify(void);
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#endif
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