On Mon, 2015-11-09 at 16:08 +0100, Hannes Reinecke wrote:
> As scsi_dh.c is now always compiled in we should be moving
> the 'dh_state' attribute to the generic code.
>
> Reviewed-by: Christoph Hellwig <h...@lst.de>
> Signed-off-by: Hannes Reinecke <h...@suse.de>
> ---
> drivers/scsi/scsi_dh.c | 68 +----------------------------------
> ------------
> drivers/scsi/scsi_sysfs.c | 58
> ++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 59 insertions(+), 67 deletions(-)
>
> diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c
> index 0a2168e..57ad0f3 100644
> --- a/drivers/scsi/scsi_dh.c
> +++ b/drivers/scsi/scsi_dh.c
> @@ -153,76 +153,11 @@ static void scsi_dh_handler_detach(struct
> scsi_device *sdev)
> module_put(sdev->handler->module);
> }
>
> -/*
> - * Functions for sysfs attribute 'dh_state'
> - */
> -static ssize_t
> -store_dh_state(struct device *dev, struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct scsi_device *sdev = to_scsi_device(dev);
> - struct scsi_device_handler *scsi_dh;
> - int err = -EINVAL;
> -
> - if (sdev->sdev_state == SDEV_CANCEL ||
> - sdev->sdev_state == SDEV_DEL)
> - return -ENODEV;
> -
> - if (!sdev->handler) {
> - /*
> - * Attach to a device handler
> - */
> - scsi_dh = scsi_dh_lookup(buf);
> - if (!scsi_dh)
> - return err;
> - err = scsi_dh_handler_attach(sdev, scsi_dh);
> - } else {
> - if (!strncmp(buf, "detach", 6)) {
> - /*
> - * Detach from a device handler
> - */
> - sdev_printk(KERN_WARNING, sdev,
> - "can't detach handler %s.\n",
> - sdev->handler->name);
> - err = -EINVAL;
> - } else if (!strncmp(buf, "activate", 8)) {
> - /*
> - * Activate a device handler
> - */
> - if (sdev->handler->activate)
> - err = sdev->handler->activate(sdev,
> NULL, NULL);
> - else
> - err = 0;
> - }
> - }
> -
> - return err<0?err:count;
> -}
> -
> -static ssize_t
> -show_dh_state(struct device *dev, struct device_attribute *attr,
> char *buf)
> -{
> - struct scsi_device *sdev = to_scsi_device(dev);
> -
> - if (!sdev->handler)
> - return snprintf(buf, 20, "detached\n");
> -
> - return snprintf(buf, 20, "%s\n", sdev->handler->name);
> -}
> -
> -static struct device_attribute scsi_dh_state_attr =
> - __ATTR(dh_state, S_IRUGO | S_IWUSR, show_dh_state,
> - store_dh_state);
> -
> int scsi_dh_add_device(struct scsi_device *sdev)
> {
> struct scsi_device_handler *devinfo = NULL;
> const char *drv;
> - int err;
> -
> - err = device_create_file(&sdev->sdev_gendev,
> &scsi_dh_state_attr);
> - if (err)
> - return err;
> + int err = 0;
>
> drv = scsi_dh_find_driver(sdev);
> if (drv)
> @@ -236,7 +171,6 @@ void scsi_dh_remove_device(struct scsi_device
> *sdev)
> {
> if (sdev->handler)
> scsi_dh_handler_detach(sdev);
> - device_remove_file(&sdev->sdev_gendev, &scsi_dh_state_attr);
> }
>
> /*
> diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
> index f021423..13a5ede 100644
> --- a/drivers/scsi/scsi_sysfs.c
> +++ b/drivers/scsi/scsi_sysfs.c
> @@ -17,6 +17,7 @@
> #include <scsi/scsi_device.h>
> #include <scsi/scsi_host.h>
> #include <scsi/scsi_tcq.h>
> +#include <scsi/scsi_dh.h>
> #include <scsi/scsi_transport.h>
> #include <scsi/scsi_driver.h>
>
> @@ -902,6 +903,60 @@ sdev_show_function(queue_depth, "%d\n");
> static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR,
> sdev_show_queue_depth,
> sdev_store_queue_depth);
>
> +#ifdef CONFIG_SCSI_DH
> +static ssize_t
> +sdev_show_dh_state(struct device *dev, struct device_attribute
> *attr,
> + char *buf)
> +{
> + struct scsi_device *sdev = to_scsi_device(dev);
> +
> + if (!sdev->handler)
> + return snprintf(buf, 20, "detached\n");
> +
> + return snprintf(buf, 20, "%s\n", sdev->handler->name);
> +}
> +
> +static ssize_t
> +sdev_store_dh_state(struct device *dev, struct device_attribute
> *attr,
> + const char *buf, size_t count)
> +{
> + struct scsi_device *sdev = to_scsi_device(dev);
> + int err = -EINVAL;
> +
> + if (sdev->sdev_state == SDEV_CANCEL ||
> + sdev->sdev_state == SDEV_DEL)
> + return -ENODEV;
> +
> + if (!sdev->handler) {
> + /*
> + * Attach to a device handler
> + */
> + err = scsi_dh_attach(sdev->request_queue, buf);
> + } else if (!strncmp(buf, "activate", 8)) {
> + /*
> + * Activate a device handler
> + */
> + if (sdev->handler->activate)
> + err = sdev->handler->activate(sdev, NULL,
> NULL);
> + else
> + err = 0;
> + } else if (!strncmp(buf, "detach", 6)) {
> + /*
> + * Detach from a device handler
> + */
> + sdev_printk(KERN_WARNING, sdev,
> + "can't detach handler %s.\n",
> + sdev->handler->name);
> + err = -EINVAL;
> + }
> +
> + return err < 0 ? err : count;
> +}
> +
> +static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state,
> + sdev_store_dh_state);
> +#endif
> +
> static ssize_t
> sdev_show_queue_ramp_up_period(struct device *dev,
> struct device_attribute *attr,
> @@ -971,6 +1026,9 @@ static struct attribute *scsi_sdev_attrs[] = {
> &dev_attr_modalias.attr,
> &dev_attr_queue_depth.attr,
> &dev_attr_queue_type.attr,
> +#ifdef CONFIG_SCSI_DH
> + &dev_attr_dh_state.attr,
> +#endif
> &dev_attr_queue_ramp_up_period.attr,
> REF_EVT(media_change),
> REF_EVT(inquiry_change_reported),
Reviewed-by: Johannes Thumshirn <jthumsh...@suse.de>
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