C-EDF: move /proc/litmus/cluster_cache to /proc/litmus/plugins/C-EDF/cluster

Make use of the new per-plugin proc file infrastructure to avoid
littering the global namespace. While at it, also move all the
relevant bits to sched_cedf.c. In the future, each plugin's parameters
should be handled in the respective plugin file.

1 files changed, 56 insertions, 0 deletions

diff --git a/litmus/sched_cedf.c b/litmus/sched_cedf.c
index 73fe1c442a0d..e320e8f3bc02 100644
--- a/litmus/sched_cedf.c
+++ b/litmus/sched_cedf.c
@@ -769,6 +769,62 @@ static struct sched_plugin cedf_plugin __cacheline_aligned_in_smp = {
 
 static struct proc_dir_entry *cluster_file = NULL, *cedf_dir = NULL;
 
+/* proc file interface to configure the cluster size */
+
+static int proc_read_cluster_size(char *page, char **start,
+                                  off_t off, int count,
+                                  int *eof, void *data)
+{
+        int len;
+        if (cluster_index >= 1 && cluster_index <= 3)
+                len = snprintf(page, PAGE_SIZE, "L%d\n", cluster_index);
+        else
+                len = snprintf(page, PAGE_SIZE, "ALL\n");
+
+        return len;
+}
+
+static int proc_write_cluster_size(struct file *file,
+                                   const char *buffer,
+                                   unsigned long count,
+                                   void *data)
+{
+        int len;
+        /* L2, L3 */
+        char cache_name[33];
+
+        if(count > 32)
+                len = 32;
+        else
+                len = count;
+
+        if(copy_from_user(cache_name, buffer, len))
+                return -EFAULT;
+
+        cache_name[len] = '\0';
+        /* chomp name */
+        if (len > 1 && cache_name[len - 1] == '\n')
+                cache_name[len - 1] = '\0';
+
+        /* do a quick and dirty comparison to find the cluster size */
+        if (!strcmp(cache_name, "L2"))
+                cluster_index = 2;
+        else if (!strcmp(cache_name, "L3"))
+                cluster_index = 3;
+        else if (!strcmp(cache_name, "L1"))
+                cluster_index = 1;
+        else if (!strcmp(cache_name, "ALL"))
+                cluster_index = num_online_cpus();
+        else
+                printk(KERN_INFO "Cluster '%s' is unknown.\n", cache_name);
+
+        return len;
+}
+
+
+static struct proc_dir_entry *cluster_file = NULL, *cedf_dir = NULL;
+
+
 static int __init init_cedf(void)
 {
         int err, fs;