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if: allow open() only when switched on

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Thomas Schoebel-Theuer 2012-12-04 09:26:19 +01:00 committed by Thomas Schoebel-Theuer
parent 1e369b366c
commit db19f86347
3 changed files with 42 additions and 9 deletions
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47
mars_if.c
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@ -796,10 +796,13 @@ static int if_switch(struct if_brick *brick)
goto done; // don't indicate "off" status
}
if (input->bdev) {
MARS_DBG("calling bdput()\n");
bdput(input->bdev);
input->bdev = NULL;
}
MARS_DBG("calling del_gendisk()\n");
del_gendisk(input->disk);
MARS_DBG("calling put_disk()\n");
put_disk(input->disk);
input->disk = NULL;
status = 0;
@ -816,9 +819,35 @@ done:
static int if_open(struct block_device *bdev, fmode_t mode)
{
struct if_input *input = bdev->bd_disk->private_data;
struct if_input *input;
struct if_brick *brick;
if (unlikely(!bdev || !bdev->bd_disk)) {
MARS_ERR("----------------------- INVAL ------------------------------\n");
return -EINVAL;
}
input = bdev->bd_disk->private_data;
if (unlikely(!input || !input->brick)) {
MARS_ERR("----------------------- BAD IF SETUP ------------------------------\n");
return -EINVAL;
}
brick = input->brick;
down(&brick->switch_sem);
if (unlikely(!brick->power.led_on)) {
MARS_INF("----------------------- BUSY %d ------------------------------\n", atomic_read(&input->open_count));
up(&brick->switch_sem);
return -EBUSY;
}
atomic_inc(&input->open_count);
MARS_INF("----------------------- OPEN %d ------------------------------\n", atomic_read(&input->open_count));
up(&brick->switch_sem);
return 0;
}
@ -829,14 +858,16 @@ static int if_release(struct gendisk *gd, fmode_t mode)
MARS_INF("----------------------- CLOSE %d ------------------------------\n", atomic_read(&input->open_count));
while ((nr = atomic_read(&input->flying_count)) > 0) {
MARS_INF("%d IO requests not yet completed\n", nr);
brick_msleep(3000);
}
if (atomic_dec_and_test(&input->open_count)) {
struct if_brick *brick = input->brick;
if_switch(brick);
struct if_brick *brick;
brick = input->brick;
while ((nr = atomic_read(&input->flying_count)) > 0) {
MARS_INF("%d IO requests not yet completed\n", nr);
brick_msleep(1000);
}
MARS_DBG("status button=%d led_on=%d led_off=%d\n", brick->power.button, brick->power.led_on, brick->power.led_off);
mars_trigger();
}
return 0;

2
mars_trans_logger.c
View File

@ -2269,6 +2269,8 @@ void trans_logger_log(struct trans_logger_brick *brick)
struct rank_data rkd[LOGGER_QUEUES] = {};
int nr_flying;
brick->replay_code = 0; // indicates "running"
_init_inputs(brick);
mars_power_led_on((void*)brick, true);

2
sy_old/mars_light.c
View File

@ -2554,7 +2554,7 @@ int make_log_finalize(struct mars_global *global, struct mars_dent *dent)
do_stop = !rot->is_primary;
}
MARS_DBG("replay_code = %d do_stop = %d\n", trans_brick->replay_code, (int)do_stop);
MARS_DBG("replay_mode = %d replay_code = %d is_primary = %d do_stop = %d\n", trans_brick->replay_mode, trans_brick->replay_code, rot->is_primary, (int)do_stop);
if (do_stop) {
status = _stop_trans(rot, parent->d_path);