From 32710457c895baefd7de6687e9e08f40ae7b2d24 Mon Sep 17 00:00:00 2001 From: Prarit Bhargava Date: Tue, 5 May 2015 18:36:07 -0400 Subject: [PATCH] staging: unisys: unify devmajorminor attributes into visorbus_main.c The code in devmajorminor_attr.[ch] only creates sysfs files and is called only in visorbus_main.c. This code should be unified into visorbus_main.c. The only changes are a forward declaration issue with register_devmajorminor_attributes() and making the functions static. Signed-off-by: Prarit Bhargava Signed-off-by: Benjamin Romer Signed-off-by: Greg Kroah-Hartman --- drivers/staging/unisys/visorbus/Makefile | 2 +- .../unisys/visorbus/devmajorminor_attr.c | 192 ------------------ .../unisys/visorbus/devmajorminor_attr.h | 31 --- .../staging/unisys/visorbus/visorbus_main.c | 176 +++++++++++++++- 4 files changed, 176 insertions(+), 225 deletions(-) delete mode 100644 drivers/staging/unisys/visorbus/devmajorminor_attr.c delete mode 100644 drivers/staging/unisys/visorbus/devmajorminor_attr.h diff --git a/drivers/staging/unisys/visorbus/Makefile b/drivers/staging/unisys/visorbus/Makefile index d44fbf63404e..0465fb909a99 100644 --- a/drivers/staging/unisys/visorbus/Makefile +++ b/drivers/staging/unisys/visorbus/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_UNISYS_VISORBUS) += visorbus.o -visorbus-y := visorbus_main.o devmajorminor_attr.o +visorbus-y := visorbus_main.o visorbus-y += visorchannel_funcs.o ccflags-y += -Idrivers/staging/unisys/include diff --git a/drivers/staging/unisys/visorbus/devmajorminor_attr.c b/drivers/staging/unisys/visorbus/devmajorminor_attr.c deleted file mode 100644 index ceb4bb7394c6..000000000000 --- a/drivers/staging/unisys/visorbus/devmajorminor_attr.c +++ /dev/null @@ -1,192 +0,0 @@ -/* devmajorminor_attr.c - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -/* Implement publishing of device node attributes under: - * - * /sys/bus/visorbus/dev/devmajorminor - * - */ - -#include "devmajorminor_attr.h" -#define CURRENT_FILE_PC VISOR_BUS_PC_devmajorminor_attr_c - -#define to_devmajorminor_attr(_attr) \ - container_of(_attr, struct devmajorminor_attribute, attr) -#define to_visor_device_from_kobjdevmajorminor(obj) \ - container_of(obj, struct visor_device, kobjdevmajorminor) - -struct devmajorminor_attribute { - struct attribute attr; - int slot; - ssize_t (*show)(struct visor_device *, int slot, char *buf); - ssize_t (*store)(struct visor_device *, int slot, const char *buf, - size_t count); -}; - -static ssize_t DEVMAJORMINOR_ATTR(struct visor_device *dev, int slot, char *buf) -{ - int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); - - if (slot < 0 || slot >= maxdevnodes) - return 0; - return snprintf(buf, PAGE_SIZE, "%d:%d\n", - dev->devnodes[slot].major, dev->devnodes[slot].minor); -} - -static ssize_t -devmajorminor_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) -{ - struct devmajorminor_attribute *devmajorminor_attr = - to_devmajorminor_attr(attr); - struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); - ssize_t ret = 0; - - if (devmajorminor_attr->show) - ret = devmajorminor_attr->show(dev, - devmajorminor_attr->slot, buf); - return ret; -} - -static ssize_t -devmajorminor_attr_store(struct kobject *kobj, - struct attribute *attr, const char *buf, size_t count) -{ - struct devmajorminor_attribute *devmajorminor_attr = - to_devmajorminor_attr(attr); - struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); - ssize_t ret = 0; - - if (devmajorminor_attr->store) - ret = devmajorminor_attr->store(dev, - devmajorminor_attr->slot, - buf, count); - return ret; -} - -int -devmajorminor_create_file(struct visor_device *dev, const char *name, - int major, int minor) -{ - int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); - struct devmajorminor_attribute *myattr = NULL; - int x = -1, rc = 0, slot = -1; - - register_devmajorminor_attributes(dev); - for (slot = 0; slot < maxdevnodes; slot++) - if (!dev->devnodes[slot].attr) - break; - if (slot == maxdevnodes) { - rc = -ENOMEM; - goto away; - } - myattr = kmalloc(sizeof(*myattr), GFP_KERNEL); - if (!myattr) { - rc = -ENOMEM; - goto away; - } - memset(myattr, 0, sizeof(struct devmajorminor_attribute)); - myattr->show = DEVMAJORMINOR_ATTR; - myattr->store = NULL; - myattr->slot = slot; - myattr->attr.name = name; - myattr->attr.mode = S_IRUGO; - dev->devnodes[slot].attr = myattr; - dev->devnodes[slot].major = major; - dev->devnodes[slot].minor = minor; - x = sysfs_create_file(&dev->kobjdevmajorminor, &myattr->attr); - if (x < 0) { - rc = x; - goto away; - } - kobject_uevent(&dev->device.kobj, KOBJ_ONLINE); -away: - if (rc < 0) { - kfree(myattr); - myattr = NULL; - dev->devnodes[slot].attr = NULL; - } - return rc; -} - -void -devmajorminor_remove_file(struct visor_device *dev, int slot) -{ - int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); - struct devmajorminor_attribute *myattr = NULL; - - if (slot < 0 || slot >= maxdevnodes) - return; - myattr = (struct devmajorminor_attribute *)(dev->devnodes[slot].attr); - if (myattr) - return; - sysfs_remove_file(&dev->kobjdevmajorminor, &myattr->attr); - kobject_uevent(&dev->device.kobj, KOBJ_OFFLINE); - dev->devnodes[slot].attr = NULL; - kfree(myattr); -} - -void -devmajorminor_remove_all_files(struct visor_device *dev) -{ - int i = 0; - int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); - - for (i = 0; i < maxdevnodes; i++) - devmajorminor_remove_file(dev, i); -} - -static const struct sysfs_ops devmajorminor_sysfs_ops = { - .show = devmajorminor_attr_show, - .store = devmajorminor_attr_store, -}; - -static struct kobj_type devmajorminor_kobj_type = { - .sysfs_ops = &devmajorminor_sysfs_ops -}; - -int -register_devmajorminor_attributes(struct visor_device *dev) -{ - int rc = 0, x = 0; - - if (dev->kobjdevmajorminor.parent) - goto away; /* already registered */ - x = kobject_init_and_add(&dev->kobjdevmajorminor, - &devmajorminor_kobj_type, &dev->device.kobj, - "devmajorminor"); - if (x < 0) { - rc = x; - goto away; - } - - kobject_uevent(&dev->kobjdevmajorminor, KOBJ_ADD); - -away: - return rc; -} - -void -unregister_devmajorminor_attributes(struct visor_device *dev) -{ - if (!dev->kobjdevmajorminor.parent) - return; /* already unregistered */ - devmajorminor_remove_all_files(dev); - - kobject_del(&dev->kobjdevmajorminor); - kobject_put(&dev->kobjdevmajorminor); - dev->kobjdevmajorminor.parent = NULL; -} diff --git a/drivers/staging/unisys/visorbus/devmajorminor_attr.h b/drivers/staging/unisys/visorbus/devmajorminor_attr.h deleted file mode 100644 index 0b55cb1df46a..000000000000 --- a/drivers/staging/unisys/visorbus/devmajorminor_attr.h +++ /dev/null @@ -1,31 +0,0 @@ -/* devmajorminor_attr.h - * - * Copyright (C) 2010 - 2013 UNISYS CORPORATION - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - */ - -#ifndef __DEVMAJORMINOR_ATTR_H__ -#define __DEVMAJORMINOR_ATTR_H__ - -#include "visorbus.h" /* just to get visor_device declaration */ -#include "timskmod.h" - -int register_devmajorminor_attributes(struct visor_device *dev); -void unregister_devmajorminor_attributes(struct visor_device *dev); -int devmajorminor_create_file(struct visor_device *dev, const char *nam, - int major, int minor); -void devmajorminor_remove_file(struct visor_device *dev, int slot); -void devmajorminor_remove_all_files(struct visor_device *dev); - -#endif diff --git a/drivers/staging/unisys/visorbus/visorbus_main.c b/drivers/staging/unisys/visorbus/visorbus_main.c index c4eec2cde1c2..d5556e2cb5ef 100644 --- a/drivers/staging/unisys/visorbus/visorbus_main.c +++ b/drivers/staging/unisys/visorbus/visorbus_main.c @@ -19,7 +19,6 @@ #include "visorbus_private.h" #include "timskmod.h" -#include "devmajorminor_attr.h" #include "periodic_work.h" #include "vbuschannel.h" #include "guestlinuxdebug.h" @@ -199,6 +198,181 @@ visorbus_release_device(struct device *xdev) kfree(dev); } +/* Implement publishing of device node attributes under: + * + * /sys/bus/visorbus/dev/devmajorminor + * + */ + +#define to_devmajorminor_attr(_attr) \ + container_of(_attr, struct devmajorminor_attribute, attr) +#define to_visor_device_from_kobjdevmajorminor(obj) \ + container_of(obj, struct visor_device, kobjdevmajorminor) + +struct devmajorminor_attribute { + struct attribute attr; + int slot; + ssize_t (*show)(struct visor_device *, int slot, char *buf); + ssize_t (*store)(struct visor_device *, int slot, const char *buf, + size_t count); +}; + +static ssize_t DEVMAJORMINOR_ATTR(struct visor_device *dev, int slot, char *buf) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + + if (slot < 0 || slot >= maxdevnodes) + return 0; + return snprintf(buf, PAGE_SIZE, "%d:%d\n", + dev->devnodes[slot].major, dev->devnodes[slot].minor); +} + +static ssize_t +devmajorminor_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) +{ + struct devmajorminor_attribute *devmajorminor_attr = + to_devmajorminor_attr(attr); + struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); + ssize_t ret = 0; + + if (devmajorminor_attr->show) + ret = devmajorminor_attr->show(dev, + devmajorminor_attr->slot, buf); + return ret; +} + +static ssize_t +devmajorminor_attr_store(struct kobject *kobj, + struct attribute *attr, const char *buf, size_t count) +{ + struct devmajorminor_attribute *devmajorminor_attr = + to_devmajorminor_attr(attr); + struct visor_device *dev = to_visor_device_from_kobjdevmajorminor(kobj); + ssize_t ret = 0; + + if (devmajorminor_attr->store) + ret = devmajorminor_attr->store(dev, + devmajorminor_attr->slot, + buf, count); + return ret; +} + +static int register_devmajorminor_attributes(struct visor_device *dev); + +int +devmajorminor_create_file(struct visor_device *dev, const char *name, + int major, int minor) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + struct devmajorminor_attribute *myattr = NULL; + int x = -1, rc = 0, slot = -1; + + register_devmajorminor_attributes(dev); + for (slot = 0; slot < maxdevnodes; slot++) + if (!dev->devnodes[slot].attr) + break; + if (slot == maxdevnodes) { + rc = -ENOMEM; + goto away; + } + myattr = kmalloc(sizeof(*myattr), GFP_KERNEL); + if (!myattr) { + rc = -ENOMEM; + goto away; + } + memset(myattr, 0, sizeof(struct devmajorminor_attribute)); + myattr->show = DEVMAJORMINOR_ATTR; + myattr->store = NULL; + myattr->slot = slot; + myattr->attr.name = name; + myattr->attr.mode = S_IRUGO; + dev->devnodes[slot].attr = myattr; + dev->devnodes[slot].major = major; + dev->devnodes[slot].minor = minor; + x = sysfs_create_file(&dev->kobjdevmajorminor, &myattr->attr); + if (x < 0) { + rc = x; + goto away; + } + kobject_uevent(&dev->device.kobj, KOBJ_ONLINE); +away: + if (rc < 0) { + kfree(myattr); + myattr = NULL; + dev->devnodes[slot].attr = NULL; + } + return rc; +} + +void +devmajorminor_remove_file(struct visor_device *dev, int slot) +{ + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + struct devmajorminor_attribute *myattr = NULL; + + if (slot < 0 || slot >= maxdevnodes) + return; + myattr = (struct devmajorminor_attribute *)(dev->devnodes[slot].attr); + if (myattr) + return; + sysfs_remove_file(&dev->kobjdevmajorminor, &myattr->attr); + kobject_uevent(&dev->device.kobj, KOBJ_OFFLINE); + dev->devnodes[slot].attr = NULL; + kfree(myattr); +} + +void +devmajorminor_remove_all_files(struct visor_device *dev) +{ + int i = 0; + int maxdevnodes = ARRAY_SIZE(dev->devnodes) / sizeof(dev->devnodes[0]); + + for (i = 0; i < maxdevnodes; i++) + devmajorminor_remove_file(dev, i); +} + +static const struct sysfs_ops devmajorminor_sysfs_ops = { + .show = devmajorminor_attr_show, + .store = devmajorminor_attr_store, +}; + +static struct kobj_type devmajorminor_kobj_type = { + .sysfs_ops = &devmajorminor_sysfs_ops +}; + +static int +register_devmajorminor_attributes(struct visor_device *dev) +{ + int rc = 0, x = 0; + + if (dev->kobjdevmajorminor.parent) + goto away; /* already registered */ + x = kobject_init_and_add(&dev->kobjdevmajorminor, + &devmajorminor_kobj_type, &dev->device.kobj, + "devmajorminor"); + if (x < 0) { + rc = x; + goto away; + } + + kobject_uevent(&dev->kobjdevmajorminor, KOBJ_ADD); + +away: + return rc; +} + +void +unregister_devmajorminor_attributes(struct visor_device *dev) +{ + if (!dev->kobjdevmajorminor.parent) + return; /* already unregistered */ + devmajorminor_remove_all_files(dev); + + kobject_del(&dev->kobjdevmajorminor); + kobject_put(&dev->kobjdevmajorminor); + dev->kobjdevmajorminor.parent = NULL; +} + /* Implement publishing of channel attributes under: * * /sys/bus/visorbus/dev/channel -- 2.20.1