return 0;
}
-struct file_operations debugfs_file_operations = {
+const struct file_operations debugfs_file_operations = {
.read = default_read_file,
.write = default_write_file,
.open = default_open,
};
-#define simple_type(type, format, temptype, strtolfn) \
-static ssize_t read_file_##type(struct file *file, char __user *user_buf, \
- size_t count, loff_t *ppos) \
-{ \
- char buf[32]; \
- type *val = file->private_data; \
- \
- snprintf(buf, sizeof(buf), format "\n", *val); \
- return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));\
-} \
-static ssize_t write_file_##type(struct file *file, const char __user *user_buf,\
- size_t count, loff_t *ppos) \
-{ \
- char *endp; \
- char buf[32]; \
- int buf_size; \
- type *val = file->private_data; \
- temptype tmp; \
- \
- memset(buf, 0x00, sizeof(buf)); \
- buf_size = min(count, (sizeof(buf)-1)); \
- if (copy_from_user(buf, user_buf, buf_size)) \
- return -EFAULT; \
- \
- tmp = strtolfn(buf, &endp, 0); \
- if ((endp == buf) || ((type)tmp != tmp)) \
- return -EINVAL; \
- *val = tmp; \
- return count; \
-} \
-static struct file_operations fops_##type = { \
- .read = read_file_##type, \
- .write = write_file_##type, \
- .open = default_open, \
-};
-simple_type(u8, "%c", unsigned long, simple_strtoul);
-simple_type(u16, "%hi", unsigned long, simple_strtoul);
-simple_type(u32, "%i", unsigned long, simple_strtoul);
+static void debugfs_u8_set(void *data, u64 val)
+{
+ *(u8 *)data = val;
+}
+static u64 debugfs_u8_get(void *data)
+{
+ return *(u8 *)data;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_u8, debugfs_u8_get, debugfs_u8_set, "%llu\n");
/**
- * debugfs_create_u8 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
+ * debugfs_create_u8 - create a file in the debugfs filesystem that is used to read and write an unsigned 8 bit value.
*
* @name: a pointer to a string containing the name of the file to create.
* @mode: the permission that the file should have
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);
+static void debugfs_u16_set(void *data, u64 val)
+{
+ *(u16 *)data = val;
+}
+static u64 debugfs_u16_get(void *data)
+{
+ return *(u16 *)data;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_u16, debugfs_u16_get, debugfs_u16_set, "%llu\n");
+
/**
- * debugfs_create_u16 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
+ * debugfs_create_u16 - create a file in the debugfs filesystem that is used to read and write an unsigned 16 bit value.
*
* @name: a pointer to a string containing the name of the file to create.
* @mode: the permission that the file should have
}
EXPORT_SYMBOL_GPL(debugfs_create_u16);
+static void debugfs_u32_set(void *data, u64 val)
+{
+ *(u32 *)data = val;
+}
+static u64 debugfs_u32_get(void *data)
+{
+ return *(u32 *)data;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_u32, debugfs_u32_get, debugfs_u32_set, "%llu\n");
+
/**
- * debugfs_create_u32 - create a file in the debugfs filesystem that is used to read and write a unsigned 8 bit value.
+ * debugfs_create_u32 - create a file in the debugfs filesystem that is used to read and write an unsigned 32 bit value.
*
* @name: a pointer to a string containing the name of the file to create.
* @mode: the permission that the file should have
return count;
}
-static struct file_operations fops_bool = {
+static const struct file_operations fops_bool = {
.read = read_file_bool,
.write = write_file_bool,
.open = default_open,
}
EXPORT_SYMBOL_GPL(debugfs_create_bool);
+static ssize_t read_file_blob(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct debugfs_blob_wrapper *blob = file->private_data;
+ return simple_read_from_buffer(user_buf, count, ppos, blob->data,
+ blob->size);
+}
+
+static struct file_operations fops_blob = {
+ .read = read_file_blob,
+ .open = default_open,
+};
+
+/**
+ * debugfs_create_blob - create a file in the debugfs filesystem that is
+ * used to read and write a binary blob.
+ *
+ * @name: a pointer to a string containing the name of the file to create.
+ * @mode: the permission that the file should have
+ * @parent: a pointer to the parent dentry for this file. This should be a
+ * directory dentry if set. If this paramater is NULL, then the
+ * file will be created in the root of the debugfs filesystem.
+ * @blob: a pointer to a struct debugfs_blob_wrapper which contains a pointer
+ * to the blob data and the size of the data.
+ *
+ * This function creates a file in debugfs with the given name that exports
+ * @blob->data as a binary blob. If the @mode variable is so set it can be
+ * read from. Writing is not supported.
+ *
+ * This function will return a pointer to a dentry if it succeeds. This
+ * pointer must be passed to the debugfs_remove() function when the file is
+ * to be removed (no automatic cleanup happens if your module is unloaded,
+ * you are responsible here.) If an error occurs, NULL will be returned.
+ *
+ * If debugfs is not enabled in the kernel, the value -ENODEV will be
+ * returned. It is not wise to check for this value, but rather, check for
+ * NULL or !NULL instead as to eliminate the need for #ifdef in the calling
+ * code.
+ */
+struct dentry *debugfs_create_blob(const char *name, mode_t mode,
+ struct dentry *parent,
+ struct debugfs_blob_wrapper *blob)
+{
+ return debugfs_create_file(name, mode, parent, blob, &fops_blob);
+}
+EXPORT_SYMBOL_GPL(debugfs_create_blob);
git://git.onelab.eu / linux-2.6.git / blobdiff