[PATCH 02/10] staging: unisys: add toolaction to sysfs
Benjamin Romer
benjamin.romer at unisys.com
Tue Jul 15 17:30:42 UTC 2014
Move the proc entry for controlling the toolaction field to sysfs. The field
appears in /sys/devices/platform/visorchipset/install/toolaction.
This field is used to tell s-Par which type of recovery tool action to perform
on the next guest boot-up. The meaning of the value is dependent on the type
of installation software used to commission the guest.
Signed-off-by: Benjamin Romer <benjamin.romer at unisys.com>
---
.../unisys/visorchipset/visorchipset_main.c | 157 ++++++++-------------
1 file changed, 60 insertions(+), 97 deletions(-)
diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c b/drivers/staging/unisys/visorchipset/visorchipset_main.c
index ecbeaec..d30c365 100644
--- a/drivers/staging/unisys/visorchipset/visorchipset_main.c
+++ b/drivers/staging/unisys/visorchipset/visorchipset_main.c
@@ -150,11 +150,6 @@ static ssize_t proc_read_installer(struct file *file, char __user *buf,
static ssize_t proc_write_installer(struct file *file,
const char __user *buffer,
size_t count, loff_t *ppos);
-static ssize_t proc_read_toolaction(struct file *file, char __user *buf,
- size_t len, loff_t *offset);
-static ssize_t proc_write_toolaction(struct file *file,
- const char __user *buffer,
- size_t count, loff_t *ppos);
static ssize_t proc_read_bootToTool(struct file *file, char __user *buf,
size_t len, loff_t *offset);
static ssize_t proc_write_bootToTool(struct file *file,
@@ -165,11 +160,6 @@ static const struct file_operations proc_installer_fops = {
.write = proc_write_installer,
};
-static const struct file_operations proc_toolaction_fops = {
- .read = proc_read_toolaction,
- .write = proc_write_toolaction,
-};
-
static const struct file_operations proc_bootToTool_fops = {
.read = proc_read_bootToTool,
.write = proc_write_bootToTool,
@@ -322,10 +312,36 @@ static VISORCHIPSET_BUSDEV_RESPONDERS BusDev_Responders = {
/* info for /dev/visorchipset */
static dev_t MajorDev = -1; /**< indicates major num for device */
+/* prototypes for attributes */
+static ssize_t show_toolaction(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t store_toolaction(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count);
+
+static DEVICE_ATTR(toolaction, S_IRUSR | S_IWUSR, show_toolaction,
+ store_toolaction);
+
+static struct attribute *visorchipset_install_attrs[] = {
+ &dev_attr_toolaction.attr,
+ NULL
+};
+
+static struct attribute_group visorchipset_install_group = {
+ .name = "install",
+ .attrs = visorchipset_install_attrs
+};
+
+static const struct attribute_group *visorchipset_dev_groups[] = {
+ &visorchipset_install_group,
+ NULL
+};
+
/* /sys/devices/platform/visorchipset */
static struct platform_device Visorchipset_platform_device = {
.name = "visorchipset",
.id = -1,
+ .dev.groups = visorchipset_dev_groups,
};
/* Function prototypes */
@@ -337,6 +353,40 @@ static void controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER *
msgHdr, int response,
ULTRA_SEGMENT_STATE state);
+ssize_t show_toolaction(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ if (ControlVm_channel) {
+ U8 toolAction;
+
+ visorchannel_read(ControlVm_channel,
+ offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
+ ToolAction), &toolAction, sizeof(U8));
+ return scnprintf(buf, PAGE_SIZE, "%u\n", toolAction);
+ } else
+ return -ENODEV;
+}
+
+ssize_t store_toolaction(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ if (ControlVm_channel) {
+ U8 toolAction;
+
+ if (sscanf(buf, "%hhu\n", &toolAction) == 1) {
+ if (visorchannel_write(ControlVm_channel,
+ offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
+ ToolAction),
+ &toolAction, sizeof(U8)) < 0)
+ return -EFAULT;
+ else
+ return count;
+ } else
+ return -EIO;
+ } else
+ return -ENODEV;
+}
+
static void
show_partition_property(struct seq_file *f, void *ctx, int property)
{
@@ -2423,89 +2473,6 @@ proc_write_installer(struct file *file,
}
/**
- * Reads the ToolAction field of ControlVMChannel.
- */
-static ssize_t
-proc_read_toolaction(struct file *file, char __user *buf,
- size_t len, loff_t *offset)
-{
- int length = 0;
- U8 toolAction;
- char *vbuf;
- loff_t pos = *offset;
-
- if (!ControlVm_channel)
- return -ENODEV;
-
- if (pos < 0)
- return -EINVAL;
-
- if (pos > 0 || !len)
- return 0;
-
- vbuf = kzalloc(len, GFP_KERNEL);
- if (!vbuf)
- return -ENOMEM;
-
- visorchannel_read(ControlVm_channel,
- offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
- ToolAction), &toolAction, sizeof(U8));
-
- length = sprintf(vbuf, "%u\n", toolAction);
- if (copy_to_user(buf, vbuf, length)) {
- kfree(vbuf);
- return -EFAULT;
- }
-
- kfree(vbuf);
- *offset += length;
- return length;
-}
-
-/**
- * Writes to the ToolAction field of ControlVMChannel.
- * Input: ToolAction
- * Limit 3 characters input
- */
-#define UINT8_MAX (255U)
-static ssize_t
-proc_write_toolaction(struct file *file,
- const char __user *buffer, size_t count, loff_t *ppos)
-{
- char buf[3];
- U8 toolAction;
-
- if (!ControlVm_channel)
- return -ENODEV;
-
- /* Check to make sure there is no buffer overflow */
- if (count > (sizeof(buf) - 1))
- return -EINVAL;
-
- if (copy_from_user(buf, buffer, count)) {
- WARN(1, "Error copying from user space\n");
- return -EFAULT;
- }
-
- if (sscanf(buf, "%hhd", &toolAction) != 1)
- toolAction = UINT8_MAX;
-
- if (toolAction != UINT8_MAX) {
- if (visorchannel_write
- (ControlVm_channel,
- offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, ToolAction),
- &toolAction, sizeof(U8)) < 0)
- WARN(1, "Installation ToolAction Write Failed - ToolAction = %d\n",
- toolAction);
- }
-
- /* So this function isn't called multiple times, must return
- * size of buffer
- */
- return count;
-}
-
-/**
* Reads the EfiSparIndication.BootToTool field of ControlVMChannel.
*/
static ssize_t
@@ -2600,7 +2567,6 @@ visorchipset_init(void)
{
int rc = 0, x = 0;
struct proc_dir_entry *installer_file;
- struct proc_dir_entry *toolaction_file;
struct proc_dir_entry *bootToTool_file;
if (!unisys_spar_platform)
@@ -2654,9 +2620,6 @@ visorchipset_init(void)
/* Setup Installation fields */
installer_file = proc_create("installer", 0644, ProcDir,
&proc_installer_fops);
- /* Setup the ToolAction field */
- toolaction_file = proc_create("toolaction", 0644, ProcDir,
- &proc_toolaction_fops);
/* Setup the BootToTool field */
bootToTool_file = proc_create("boottotool", 0644, ProcDir,
&proc_bootToTool_fops);
--
1.9.1
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