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-rw-r--r--kmod/readlog.c230
1 files changed, 0 insertions, 230 deletions
diff --git a/kmod/readlog.c b/kmod/readlog.c
deleted file mode 100644
index 8a1c5ad..0000000
--- a/kmod/readlog.c
+++ /dev/null
@@ -1,230 +0,0 @@
-#include <linux/init.h>
-#include <linux/module.h>
-
-#include <linux/kernel.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
-#include <linux/time.h>
-
-#include <asm/unistd.h>
-
-#include <asm/current.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Olivier Blin <blino@mandriva.com>");
-
-struct opened_file {
- struct list_head s_list;
- char *name;
-};
-
-unsigned long **sys_call_table;
-static struct dentry *dbg_dir;
-static struct dentry *dbg_file;
-struct opened_file bp;
-DECLARE_MUTEX(files_mutex);
-
-ssize_t (*read)(int f, const void *buf, size_t n);
-long (*open)(const char __user *filename, int flags, int mode);
-
-static void *profile_seq_start(struct seq_file *file, loff_t *pos)
-{
- struct list_head *p;
- loff_t l = *pos;
- down(&files_mutex);
- list_for_each(p, &bp.s_list)
- if (!l--)
- return list_entry(p, struct opened_file, s_list);
- return NULL;
-}
-
-static void *profile_seq_next(struct seq_file *file, void *v, loff_t *pos)
-{
- struct list_head *p = ((struct opened_file *)v)->s_list.next;
- (*pos)++;
- return p == &bp.s_list ? NULL : list_entry(p, struct opened_file, s_list);
-}
-
-static void profile_seq_stop(struct seq_file *file, void *v)
-{
- up(&files_mutex);
-}
-
-static int profile_seq_show(struct seq_file *file, void *v)
-{
- seq_printf(file, ((struct opened_file *)v)->name);
- seq_putc(file, '\n');
- return 0;
-}
-
-static struct seq_operations profile_seq_ops = {
- .start = profile_seq_start,
- .next = profile_seq_next,
- .stop = profile_seq_stop,
- .show = profile_seq_show,
-};
-
-static int profile_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &profile_seq_ops);
-}
-
-static struct file_operations profile_fops = {
- .owner = THIS_MODULE,
- .open = profile_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release
-};
-
-/* Borrowed from
- * http://downloads.securityfocus.com/downloads/scprint.tar.gz
- * http://www.gnome.org/~lcolitti/gnome-startup/linux-iolog/readlog.c
- * http://kerneltrap.org/node/5793
- */
-unsigned long **find_sys_call_table(void) {
- unsigned long *p;
-
- for (p = (unsigned long *)((init_mm.end_code + 4) & 0xfffffffc);
- p < (unsigned long *)init_mm.end_data; p++) {
- if (p[__NR_close] == (unsigned long) sys_close){
- return (unsigned long **) p;
- }
- }
-
- return NULL;
-}
-
-void addfilename(const char *filename) {
- struct opened_file *f;
-
- f = kmalloc(sizeof(struct opened_file), GFP_KERNEL);
- if (f == NULL)
- return;
-
- f->name = kmalloc(strlen(filename) + 1, GFP_KERNEL);
- if (f->name == NULL)
- return;
- strcpy(f->name, filename);
-
- INIT_LIST_HEAD(&f->s_list);
-
- printk(KERN_INFO "locking while adding: %s\n", filename);
-
- down(&files_mutex);
- list_add_tail(&f->s_list, &bp.s_list);
- up(&files_mutex);
-
- printk(KERN_INFO "unlocking after adding: %s\n", filename);
-}
-
-long loggingopen(const char __user *filename, int flags, int mode) {
- struct file *f = NULL;
- long fd;
-
- fd = open(filename, flags, mode);
-
- printk(KERN_INFO "opening fd %ld for %s\n", fd, filename);
-
- if(fd > 0 && current) {
- f = current->files->fd_array[fd];
- if(f && f->f_dentry && f->f_vfsmnt) {
- char tmpname[PATH_MAX];
- char *name = d_path(f->f_dentry, f->f_vfsmnt, tmpname, sizeof(tmpname) - 1);
- if (name)
- addfilename(name);
- }
- }
-
- return fd;
-}
-
-
-ssize_t loggingread(int fd, const void *buf, size_t n) {
- struct file *f = NULL;
- char *name = NULL;
- loff_t offset = 0;
- struct timeval tv;
- char tmpname[256];
-
- do_gettimeofday(&tv);
-
- if(current)
- f = current->files->fd_array[fd];
-
- printk(KERN_DEBUG "READ: f: %p\n", f);
-
-
- if(f)
- offset = f->f_pos;
-
- if (f)
- printk(KERN_DEBUG "READ: d_entry: %p, vfsmnt: %p\n", f->f_dentry, f->f_vfsmnt);
-
- if(f && f->f_dentry && f->f_vfsmnt) {
- printk(KERN_DEBUG "READ: d_path\n");
- name = d_path(f->f_dentry, f->f_vfsmnt, tmpname, sizeof(tmpname) - 1);
- if (name)
- addfilename(name);
- }
-
- printk(KERN_DEBUG "READ: %lu.%lu (%s/%d) %Lu %s\n",
- tv.tv_sec, tv.tv_usec,
- current ? current->comm : "?",
- current ? current->pid : 0,
- offset,
- name ? name : "<no dentry>"
- );
-
- return read(fd, buf, n);
-}
-
-static int __init readlog_init(void) {
- sys_call_table = find_sys_call_table();
- /* compare with grep sys_call_table /boot/System.map */
- printk(KERN_INFO "Found sys_call_table at %p\n", sys_call_table);
-
- open = (void *) (sys_call_table[__NR_open]);
- sys_call_table[__NR_open] = (void *) loggingopen;
-
- read = (void *) (sys_call_table[__NR_read]);
- /* sys_call_table[__NR_read] = (void *) loggingread; */
-
- dbg_dir = debugfs_create_dir("dmc", NULL);
- if (IS_ERR(dbg_dir)) {
- printk(KERN_NOTICE ": debugfs is not available\n");
- return -ENODEV;
- }
- if (dbg_dir == NULL) {
- printk(KERN_NOTICE ": unable to create usbmon directory\n");
- return -ENODEV;
- }
-
- dbg_file = debugfs_create_file("bp", 0600, dbg_dir, NULL, &profile_fops);
- if (dbg_file == NULL) {
- debugfs_remove(dbg_dir);
- return -ENODEV;
- }
-
- INIT_LIST_HEAD(&bp.s_list);
-
- return 0;
-}
-
-static void __exit readlog_exit(void) {
- debugfs_remove(dbg_file);
- debugfs_remove(dbg_dir);
-
- sys_call_table[__NR_open] = (void *) open;
- sys_call_table[__NR_read] = (void *) read;
-
- printk(KERN_INFO "sys_call_table restored\n");
-
-}
-
-module_init(readlog_init);
-module_exit(readlog_exit);
generated by cgit v1.2.1 (git 2.21.0) at 2024-05-21 16:23:00 +0000