Retry if posix_fallocate is interrupted with EINTR (#453)
Every now and then Pacemaker reports errors:
(pcmk__new_client) debug: New IPC client 3efdbecf-c2d9-44bc-b4a6-9bcd48021ba1 for PID 27492 with uid 0 and gid 0 (handle_new_connection) debug: IPC credentials authenticated (/dev/shm/qb-7271-27492-12-hfPbKY/qb) (qb_ipcs_shm_connect) debug: connecting to client [27492] (qb_rb_open_2) debug: shm size:524301; real_size:528384; rb->word_size:132096 (qb_rb_open_2) debug: shm size:524301; real_size:528384; rb->word_size:132096 (qb_sys_mmap_file_open) error: couldn't allocate file /dev/shm/qb-7271-27492-12-hfPbKY/qb-event-cib_rw-data: Interrupted system call (4) (qb_rb_open_2) error: couldn't create file for mmap (qb_ipcs_shm_rb_open) error: qb_rb_open:/dev/shm/qb-7271-27492-12-hfPbKY/qb-event-cib_rw: Interrupted system call (4) (qb_rb_close_helper) debug: Free'ing ringbuffer: /dev/shm/qb-7271-27492-12-hfPbKY/qb-response-cib_rw-header (qb_rb_close_helper) debug: Free'ing ringbuffer: /dev/shm/qb-7271-27492-12-hfPbKY/qb-request-cib_rw-header (qb_ipcs_shm_connect) error: shm connection FAILED: Interrupted system call (4) (handle_new_connection) error: Error in connection setup (/dev/shm/qb-7271-27492-12-hfPbKY/qb): Interrupted system call (4)
While it probably might be addressed in Pacemaker code, a simple retry
loop in case posix_fallocate(3) returns EINTR seems to be a decent
workaround.
Fixes: #451
Signed-off-by: Jakub Jankowski <shasta@toxcorp.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>