diff options
Diffstat (limited to 'drivers/scsi/ipr.c')
| -rw-r--r-- | drivers/scsi/ipr.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 1d440f2763c..eae61d994b9 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -2180,6 +2180,74 @@ static struct class_device_attribute ipr_diagnostics_attr = { }; /** + * ipr_show_adapter_state - Show the adapter's state + * @class_dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ipr_show_adapter_state(struct class_device *class_dev, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(class_dev); + struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata; + unsigned long lock_flags = 0; + int len; + + spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags); + if (ioa_cfg->ioa_is_dead) + len = snprintf(buf, PAGE_SIZE, "offline\n"); + else + len = snprintf(buf, PAGE_SIZE, "online\n"); + spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); + return len; +} + +/** + * ipr_store_adapter_state - Change adapter state + * @class_dev: class_device struct + * @buf: buffer + * @count: buffer size + * + * This function will change the adapter's state. + * + * Return value: + * count on success / other on failure + **/ +static ssize_t ipr_store_adapter_state(struct class_device *class_dev, + const char *buf, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(class_dev); + struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata; + unsigned long lock_flags; + int result = count; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags); + if (ioa_cfg->ioa_is_dead && !strncmp(buf, "online", 6)) { + ioa_cfg->ioa_is_dead = 0; + ioa_cfg->reset_retries = 0; + ioa_cfg->in_ioa_bringdown = 0; + ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE); + } + spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); + wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload); + + return result; +} + +static struct class_device_attribute ipr_ioa_state_attr = { + .attr = { + .name = "state", + .mode = S_IRUGO | S_IWUSR, + }, + .show = ipr_show_adapter_state, + .store = ipr_store_adapter_state +}; + +/** * ipr_store_reset_adapter - Reset the adapter * @class_dev: class_device struct * @buf: buffer @@ -2515,6 +2583,7 @@ static struct class_device_attribute *ipr_ioa_attrs[] = { &ipr_fw_version_attr, &ipr_log_level_attr, &ipr_diagnostics_attr, + &ipr_ioa_state_attr, &ipr_ioa_reset_attr, &ipr_update_fw_attr, &ipr_ioa_cache_attr, |