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Fix failure situations in dm_task_run for udev sync.

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This commit is contained in:
Peter Rajnoha
2009-08-06 15:02:01 +00:00
parent 1879e85672
commit 2be430435f
1 changed files with 29 additions and 11 deletions
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40
libdm/ioctl/libdm-iface.c
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@ -1486,6 +1486,18 @@ static int _mknodes_v4(struct dm_task *dmt)
return _process_all_v4(dmt);
}
/*
* If an operation that uses a cookie fails, decrement the
* semaphore instead of udev.
*/
static int _udev_complete(struct dm_task *dmt)
{
if (dmt->cookie_set)
return dm_udev_complete(dmt->event_nr);
return 1;
}
static int _create_and_load_v4(struct dm_task *dmt)
{
struct dm_task *task;
@ -1494,17 +1506,20 @@ static int _create_and_load_v4(struct dm_task *dmt)
/* Use new task struct to create the device */
if (!(task = dm_task_create(DM_DEVICE_CREATE))) {
log_error("Failed to create device-mapper task struct");
_udev_complete(dmt);
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
_udev_complete(dmt);
return 0;
}
if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
dm_task_destroy(task);
_udev_complete(dmt);
return 0;
}
@ -1516,18 +1531,22 @@ static int _create_and_load_v4(struct dm_task *dmt)
r = dm_task_run(task);
dm_task_destroy(task);
if (!r)
return r;
if (!r) {
_udev_complete(dmt);
return 0;
}
/* Next load the table */
if (!(task = dm_task_create(DM_DEVICE_RELOAD))) {
log_error("Failed to create device-mapper task struct");
_udev_complete(dmt);
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
_udev_complete(dmt);
return 0;
}
@ -1540,8 +1559,10 @@ static int _create_and_load_v4(struct dm_task *dmt)
task->head = NULL;
task->tail = NULL;
dm_task_destroy(task);
if (!r)
if (!r) {
_udev_complete(dmt);
goto revert;
}
/* Use the original structure last so the info will be correct */
dmt->type = DM_DEVICE_RESUME;
@ -1557,6 +1578,7 @@ static int _create_and_load_v4(struct dm_task *dmt)
dmt->type = DM_DEVICE_REMOVE;
dm_free(dmt->uuid);
dmt->uuid = NULL;
dmt->cookie_set = 0;
if (!dm_task_run(dmt))
log_error("Failed to revert device creation.");
@ -1739,19 +1761,15 @@ int dm_task_run(struct dm_task *dmt)
if ((dmt->type == DM_DEVICE_RELOAD) && dmt->suppress_identical_reload)
return _reload_with_suppression_v4(dmt);
if (!_open_control())
if (!_open_control()) {
_udev_complete(dmt);
return 0;
}
/* FIXME Detect and warn if cookie set but should not be. */
repeat_ioctl:
if (!(dmi = _do_dm_ioctl(dmt, command, _ioctl_buffer_double_factor))) {
/*
* If an operation that uses a cookie fails, decrement the
* semaphore instead of udev.
* FIXME Review error paths: found one where uevent fired too.
*/
if (dmt->cookie_set)
dm_udev_complete(dmt->event_nr);
_udev_complete(dmt);
return 0;
}