diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/chsc_sch.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c index 5fe9f8c4b4fb..64cd60063ffc 100644 --- a/drivers/s390/cio/chsc_sch.c +++ b/drivers/s390/cio/chsc_sch.c @@ -29,6 +29,10 @@ static debug_info_t *chsc_debug_msg_id; static debug_info_t *chsc_debug_log_id; +static struct chsc_request *on_close_request; +static struct chsc_async_area *on_close_chsc_area; +static DEFINE_MUTEX(on_close_mutex); + #define CHSC_MSG(imp, args...) do { \ debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ } while (0) @@ -362,6 +366,68 @@ out_free: return ret; } +static int chsc_ioctl_on_close_set(void __user *user_area) +{ + char dbf[13]; + int ret; + + mutex_lock(&on_close_mutex); + if (on_close_chsc_area) { + ret = -EBUSY; + goto out_unlock; + } + on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL); + if (!on_close_request) { + ret = -ENOMEM; + goto out_unlock; + } + on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); + if (!on_close_chsc_area) { + ret = -ENOMEM; + goto out_free_request; + } + if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) { + ret = -EFAULT; + goto out_free_chsc; + } + ret = 0; + goto out_unlock; + +out_free_chsc: + free_page((unsigned long)on_close_chsc_area); + on_close_chsc_area = NULL; +out_free_request: + kfree(on_close_request); + on_close_request = NULL; +out_unlock: + mutex_unlock(&on_close_mutex); + sprintf(dbf, "ocsret:%d", ret); + CHSC_LOG(0, dbf); + return ret; +} + +static int chsc_ioctl_on_close_remove(void) +{ + char dbf[13]; + int ret; + + mutex_lock(&on_close_mutex); + if (!on_close_chsc_area) { + ret = -ENOENT; + goto out_unlock; + } + free_page((unsigned long)on_close_chsc_area); + on_close_chsc_area = NULL; + kfree(on_close_request); + on_close_request = NULL; + ret = 0; +out_unlock: + mutex_unlock(&on_close_mutex); + sprintf(dbf, "ocrret:%d", ret); + CHSC_LOG(0, dbf); + return ret; +} + static int chsc_ioctl_start_sync(void __user *user_area) { struct chsc_sync_area *chsc_area; @@ -842,6 +908,10 @@ static long chsc_ioctl(struct file *filp, unsigned int cmd, return chsc_ioctl_chpd(argp); case CHSC_INFO_DCAL: return chsc_ioctl_dcal(argp); + case CHSC_ON_CLOSE_SET: + return chsc_ioctl_on_close_set(argp); + case CHSC_ON_CLOSE_REMOVE: + return chsc_ioctl_on_close_remove(); default: /* unknown ioctl number */ return -ENOIOCTLCMD; } @@ -860,6 +930,30 @@ static int chsc_open(struct inode *inode, struct file *file) static int chsc_release(struct inode *inode, struct file *filp) { + char dbf[13]; + int ret; + + mutex_lock(&on_close_mutex); + if (!on_close_chsc_area) + goto out_unlock; + init_completion(&on_close_request->completion); + CHSC_LOG(0, "on_close"); + chsc_log_command(on_close_chsc_area); + spin_lock_irq(&chsc_lock); + ret = chsc_async(on_close_chsc_area, on_close_request); + spin_unlock_irq(&chsc_lock); + if (ret == -EINPROGRESS) { + wait_for_completion(&on_close_request->completion); + ret = chsc_examine_irb(on_close_request); + } + sprintf(dbf, "relret:%d", ret); + CHSC_LOG(0, dbf); + free_page((unsigned long)on_close_chsc_area); + on_close_chsc_area = NULL; + kfree(on_close_request); + on_close_request = NULL; +out_unlock: + mutex_unlock(&on_close_mutex); atomic_inc(&chsc_ready_for_use); return 0; } |