Re: [PATCH 2/4] RDMA: Convert sysfs kobject * show functions to use sysfs_emit()

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On Thu, Oct 8, 2020 at 4:36 AM Joe Perches <joe@xxxxxxxxxxx> wrote:
>
> Done with cocci script:
>
> @@
> identifier k_show;
> identifier arg1, arg2, arg3;
> @@
> ssize_t k_show(struct kobject *
> -       arg1
> +       kobj
>         , struct kobj_attribute *
> -       arg2
> +       attr
>         , char *
> -       arg3
> +       buf
>         )
> {
>         ...
> (
> -       arg1
> +       kobj
> |
> -       arg2
> +       attr
> |
> -       arg3
> +       buf
> )
>         ...
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         return
> -       sprintf(buf,
> +       sysfs_emit(buf,
>         ...);
>         ...>
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         return
> -       snprintf(buf, PAGE_SIZE,
> +       sysfs_emit(buf,
>         ...);
>         ...>
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         return
> -       scnprintf(buf, PAGE_SIZE,
> +       sysfs_emit(buf,
>         ...);
>         ...>
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> expression chr;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         return
> -       strcpy(buf, chr);
> +       sysfs_emit(buf, chr);
>         ...>
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> identifier len;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         len =
> -       sprintf(buf,
> +       sysfs_emit(buf,
>         ...);
>         ...>
>         return len;
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> identifier len;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         len =
> -       snprintf(buf, PAGE_SIZE,
> +       sysfs_emit(buf,
>         ...);
>         ...>
>         return len;
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> identifier len;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
>         len =
> -       scnprintf(buf, PAGE_SIZE,
> +       sysfs_emit(buf,
>         ...);
>         ...>
>         return len;
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> identifier len;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         <...
> -       len += scnprintf(buf + len, PAGE_SIZE - len,
> +       len += sysfs_emit_at(buf, len,
>         ...);
>         ...>
>         return len;
> }
>
> @@
> identifier k_show;
> identifier kobj, attr, buf;
> expression chr;
> @@
>
> ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> {
>         ...
> -       strcpy(buf, chr);
> -       return strlen(buf);
> +       return sysfs_emit(buf, chr);
> }
>
> Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
Thanks,
Acked-by: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxx>
> ---
>  drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c | 26 ++++++++++----------
>  drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 14 +++++------
>  2 files changed, 20 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
> index 7f71f10126fc..0c767582286b 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
> @@ -187,9 +187,9 @@ static ssize_t rtrs_clt_state_show(struct kobject *kobj,
>
>         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
>         if (sess->state == RTRS_CLT_CONNECTED)
> -               return sprintf(page, "connected\n");
> +               return sysfs_emit(page, "connected\n");
>
> -       return sprintf(page, "disconnected\n");
> +       return sysfs_emit(page, "disconnected\n");
>  }
>
>  static struct kobj_attribute rtrs_clt_state_attr =
> @@ -197,10 +197,10 @@ static struct kobj_attribute rtrs_clt_state_attr =
>
>  static ssize_t rtrs_clt_reconnect_show(struct kobject *kobj,
>                                         struct kobj_attribute *attr,
> -                                       char *page)
> +                                       char *buf)
>  {
> -       return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
> -                        attr->attr.name);
> +       return sysfs_emit(buf, "Usage: echo 1 > %s\n",
> +                         attr->attr.name);
>  }
>
>  static ssize_t rtrs_clt_reconnect_store(struct kobject *kobj,
> @@ -229,10 +229,10 @@ static struct kobj_attribute rtrs_clt_reconnect_attr =
>
>  static ssize_t rtrs_clt_disconnect_show(struct kobject *kobj,
>                                          struct kobj_attribute *attr,
> -                                        char *page)
> +                                        char *buf)
>  {
> -       return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
> -                        attr->attr.name);
> +       return sysfs_emit(buf, "Usage: echo 1 > %s\n",
> +                         attr->attr.name);
>  }
>
>  static ssize_t rtrs_clt_disconnect_store(struct kobject *kobj,
> @@ -261,10 +261,10 @@ static struct kobj_attribute rtrs_clt_disconnect_attr =
>
>  static ssize_t rtrs_clt_remove_path_show(struct kobject *kobj,
>                                           struct kobj_attribute *attr,
> -                                         char *page)
> +                                         char *buf)
>  {
> -       return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
> -                        attr->attr.name);
> +       return sysfs_emit(buf, "Usage: echo 1 > %s\n",
> +                         attr->attr.name);
>  }
>
>  static ssize_t rtrs_clt_remove_path_store(struct kobject *kobj,
> @@ -327,7 +327,7 @@ static ssize_t rtrs_clt_hca_port_show(struct kobject *kobj,
>
>         sess = container_of(kobj, typeof(*sess), kobj);
>
> -       return scnprintf(page, PAGE_SIZE, "%u\n", sess->hca_port);
> +       return sysfs_emit(page, "%u\n", sess->hca_port);
>  }
>
>  static struct kobj_attribute rtrs_clt_hca_port_attr =
> @@ -341,7 +341,7 @@ static ssize_t rtrs_clt_hca_name_show(struct kobject *kobj,
>
>         sess = container_of(kobj, struct rtrs_clt_sess, kobj);
>
> -       return scnprintf(page, PAGE_SIZE, "%s\n", sess->hca_name);
> +       return sysfs_emit(page, "%s\n", sess->hca_name);
>  }
>
>  static struct kobj_attribute rtrs_clt_hca_name_attr =
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
> index 07fbb063555d..381a776ce404 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
> @@ -28,10 +28,10 @@ static struct kobj_type ktype = {
>
>  static ssize_t rtrs_srv_disconnect_show(struct kobject *kobj,
>                                          struct kobj_attribute *attr,
> -                                        char *page)
> +                                        char *buf)
>  {
> -       return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
> -                        attr->attr.name);
> +       return sysfs_emit(buf, "Usage: echo 1 > %s\n",
> +                         attr->attr.name);
>  }
>
>  static ssize_t rtrs_srv_disconnect_store(struct kobject *kobj,
> @@ -72,8 +72,8 @@ static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj,
>         sess = container_of(kobj, typeof(*sess), kobj);
>         usr_con = sess->s.con[0];
>
> -       return scnprintf(page, PAGE_SIZE, "%u\n",
> -                        usr_con->cm_id->port_num);
> +       return sysfs_emit(page, "%u\n",
> +                         usr_con->cm_id->port_num);
>  }
>
>  static struct kobj_attribute rtrs_srv_hca_port_attr =
> @@ -87,8 +87,8 @@ static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj,
>
>         sess = container_of(kobj, struct rtrs_srv_sess, kobj);
>
> -       return scnprintf(page, PAGE_SIZE, "%s\n",
> -                        sess->s.dev->ib_dev->name);
> +       return sysfs_emit(page, "%s\n",
> +                         sess->s.dev->ib_dev->name);
>  }
>
>  static struct kobj_attribute rtrs_srv_hca_name_attr =
> --
> 2.26.0
>



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