aboutsummaryrefslogtreecommitdiff
path: root/khm
diff options
context:
space:
mode:
Diffstat (limited to 'khm')
-rw-r--r--khm/Makefile8
-rw-r--r--khm/khm.c154
-rw-r--r--khm/khm.h41
-rw-r--r--khm/test_khm.c66
4 files changed, 0 insertions, 269 deletions
diff --git a/khm/Makefile b/khm/Makefile
deleted file mode 100644
index 74ffd5f..0000000
--- a/khm/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-obj-m += test.o
-test-objs := khm.o test_khm.o
-
-all:
- make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
-
-clean:
- make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
diff --git a/khm/khm.c b/khm/khm.c
deleted file mode 100644
index a22b955..0000000
--- a/khm/khm.c
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * khm - (Linux) kernel hash map implementation
- *
- * Copyright (c) 2011 Guillermo Ramos <0xwille@gmail.com>
- *
- * This file is part of khm
- *
- * khm 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 3 of the License, or
- * (at your option) any later version.
- *
- * khm 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. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with khm. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/errno.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include "khm.h"
-
-/*
- * Returns the node with the value passed, or NULL in case it does not exist
- */
-static inline struct khashmap *khm_search(struct khashmap *head, int value)
-{
- struct list_head *list;
- struct khashmap *node;
-
- list_for_each(list, &head->l) {
- node = list_entry(list, struct khashmap, l);
- if (node->value == value)
- return node;
- }
-
- return NULL;
-}
-
-/*
- * Prints in klog a representation of all the nodes in the hashmap
- */
-void khm_display(struct khashmap *head)
-{
- struct khashmap *node;
- struct list_head *list;
-
- printk(KERN_ALERT "Displaying...");
- list_for_each(list, &head->l) {
- node = list_entry(list, struct khashmap, l);
- printk(KERN_ALERT " %p: v=%d d=%s\n",
- node, node->value, (char*)node->data);
- }
-}
-
-/*
- * Creates and returns a new head node
- */
-inline struct khashmap *khm_create(void)
-{
- struct khashmap *head;
-
- head = kmalloc(sizeof(struct khashmap), GFP_KERNEL);
- if (unlikely(!head))
- return NULL;
-
- INIT_LIST_HEAD(&head->l);
-
- return head;
-}
-
-/*
- * Deletes the hashmap and frees the memory used by its nodes
- */
-void khm_destroy(struct khashmap *head)
-{
- struct khashmap *node;
- struct list_head *list = head->l.next;
-
- while (list != &head->l) {
- node = list_entry(list, struct khashmap, l);
- list = list->next;
- kfree(node);
- }
-
- kfree(head);
-}
-
-/*
- * Creates a new node with the given value and data, and adds it to the hm head
- */
-int khm_insert(struct khashmap *head, int value, void *data)
-{
- struct khashmap *new;
-
- // Key already exists
- if (khm_search(head, value))
- return -EINVAL;
-
- new = khm_create();
- if (unlikely(!new))
- return -ENOMEM;
-
- new->value = value;
- new->data = data;
- list_add_tail(&new->l, &head->l);
-
- return 0;
-}
-
-/*
- * Removes from the hashmap the node with the given value.
- */
-int khm_delete(struct khashmap *head, int value)
-{
- struct khashmap *node = khm_search(head, value);
-
- if (node) {
- list_del(&node->l);
- kfree(node);
- return 0;
- } else {
- return -EINVAL;
- }
-}
-
-/*
- * Returns the data mapped to the given value, or NULL if that value has no data
- * associated to it
- */
-void *khm_get(struct khashmap *head, int value)
-{
- struct khashmap *node = khm_search(head, value);
-
- if (node)
- return node->data;
- else
- return NULL;
-}
-
-/*
- * Associates the given value with new data, if the value was already in the hm
- */
-void khm_set(struct khashmap *head, int value, void *data)
-{
- struct khashmap *node = khm_search(head, value);
-
- if (node)
- node->data = data;
-}
diff --git a/khm/khm.h b/khm/khm.h
deleted file mode 100644
index f917f9b..0000000
--- a/khm/khm.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * khm - (Linux) kernel hash map implementation
- *
- * Copyright (c) 2011 Guillermo Ramos <0xwille@gmail.com>
- *
- * This file is part of khm
- *
- * khm 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 3 of the License, or
- * (at your option) any later version.
- *
- * khm 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. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with khm. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/list.h>
-
-#ifndef KHM
-#define KHM
-
-struct khashmap {
- struct list_head l;
- int value;
- void *data;
-};
-
-struct khashmap *khm_create(void);
-void khm_destroy(struct khashmap *head);
-int khm_insert(struct khashmap *head, int value, void *data);
-int khm_delete(struct khashmap *head, int value);
-void *khm_get(struct khashmap *head, int value);
-void khm_set(struct khashmap *head, int value, void *data);
-void khm_display(struct khashmap *head);
-
-#endif // KHM
diff --git a/khm/test_khm.c b/khm/test_khm.c
deleted file mode 100644
index d8b0180..0000000
--- a/khm/test_khm.c
+++ /dev/null
@@ -1,66 +0,0 @@
-#include <linux/module.h>
-#include <linux/init.h>
-#include "khm.h"
-
-#define Z_ASD 1
-#define Z_QWE 2
-#define Z_BLR 3
-
-static struct khashmap *hm;
-
-static int __init test_init(void)
-{
- char *values;
-
- hm = khm_create();
-
- if ((values = (char*)khm_get(hm, Z_BLR)))
- printk(KERN_ALERT "ERROR: Z_BLR exists: %s\n", values);
- else
- printk(KERN_ALERT "Z_BLR does not exist (good)\n");
-
- if (khm_insert(hm, Z_ASD, "ASDF"))
- goto insert_err;
- if (khm_insert(hm, Z_QWE, "QWERTY"))
- goto insert_err;
- if (khm_insert(hm, Z_BLR, "BLRBLRBLR"))
- goto insert_err;
-
- khm_display(hm);
- khm_delete(hm, Z_QWE);
- khm_display(hm);
- khm_set(hm, Z_ASD, "ASDF NEW!!");
- khm_display(hm);
-
- if ((values = (char*)khm_get(hm, Z_ASD)))
- printk(KERN_ALERT "Z_ASD: %s\n", values);
- else
- printk(KERN_ALERT "Z_ASD does not exist\n");
- if ((values = (char*)khm_get(hm, Z_QWE)))
- printk(KERN_ALERT "Z_QWE: %s\n", values);
- else
- printk(KERN_ALERT "Z_QWE does not exist\n");
- if ((values = (char*)khm_get(hm, Z_BLR)))
- printk(KERN_ALERT "Z_BLR: %s\n", values);
- else
- printk(KERN_ALERT "Z_BLR does not exist\n");
-
- if (khm_insert(hm, Z_ASD, "REPEATED!!"))
- goto insert_err;
-
- return 0;
-
-insert_err:
- printk(KERN_ALERT "Error inserting (good)\n");
- return 0;
-}
-
-static void __exit test_exit(void)
-{
- khm_destroy(hm);
-}
-
-module_init(test_init);
-module_exit(test_exit);
-
-MODULE_LICENSE("GPL");