/*
* Consumers might need to operate by minor number instead of fd, since
* they might be running in another thread (e.g. txg_sync_thread). Callers
* of this function must call zfs_onexit_fd_rele() when they're finished
* using the minor number.
*/
int
zfs_onexit_fd_hold(int fd, minor_t *minorp)
{
file_t *fp = NULL;
zfs_onexit_t *zo;
uint32_t vipd;
vattr_t va;
fp = getf(fd);
if (fp == NULL)
return EBADF;
#ifdef __APPLE__
*minorp = zfsdev_getminor(current_proc());
#else
*minorp = zfsdev_getminor(fp->f_file);
#endif
return (zfs_onexit_minor_to_state(*minorp, &zo));
}
/*
* Consumers might need to operate by minor number instead of fd, since
* they might be running in another thread (e.g. txg_sync_thread). Callers
* of this function must call zfs_onexit_fd_rele() when they're finished
* using the minor number.
*/
int
zfs_onexit_fd_hold(int fd, minor_t *minorp)
{
file_t *fp, *tmpfp;
zfs_onexit_t *zo;
void *data;
int error;
fp = getf(fd, CAP_NONE);
if (fp == NULL)
return (SET_ERROR(EBADF));
tmpfp = curthread->td_fpop;
curthread->td_fpop = fp;
error = devfs_get_cdevpriv(&data);
if (error == 0)
*minorp = (minor_t)(uintptr_t)data;
curthread->td_fpop = tmpfp;
if (error != 0)
return (error);
return (zfs_onexit_minor_to_state(*minorp, &zo));
}
/*
* Return the data associated with this callback. This allows consumers
* of the cleanup-on-exit interfaces to stash kernel data across system
* calls, knowing that it will be cleaned up if the calling process exits.
*/
int
zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data)
{
zfs_onexit_t *zo;
zfs_onexit_action_node_t *ap;
int error;
*data = NULL;
error = zfs_onexit_minor_to_state(minor, &zo);
if (error)
return (error);
mutex_enter(&zo->zo_lock);
ap = zfs_onexit_find_cb(zo, action_handle);
if (ap != NULL)
*data = ap->za_data;
else
error = ENOENT;
mutex_exit(&zo->zo_lock);
return (error);
}
