driver/us_proc_inst.c

   1 ////////////////////////////////////////////////////////////////////////////////////
   2 //
   3 //      FILE:           us_proc_inst.c
   4 //
   5 //      DESCRIPTION:
   6 //      This file is C source for SWAP driver.
   7 //
   8 //      SEE ALSO:       us_proc_inst.h
   9 //      AUTHOR:         A.Gerenkov, E. Gorelkina
  10 //      COMPANY NAME:   Samsung Research Center in Moscow
  11 //      DEPT NAME:      Advanced Software Group
  12 //      CREATED:        2008.06.02
  13 //      VERSION:        1.0
  14 //      REVISION DATE:  2008.12.02
  15 //
  16 ////////////////////////////////////////////////////////////////////////////////////
  17
  18 #include "module.h"
  19 #include "us_proc_inst.h"
  20
  21 #include "../kprobe/dbi_kprobes_deps.h"
  22 #include "../uprobe/swap_uprobes.h"
  23
  24 #include "sspt/sspt.h"
  25 #include "helper.h"
  26 #include "us_slot_manager.h"
  27
  28 #define print_event(fmt, args...)                                               \
  29 {                                                                               \
  30         char *buf[1024];                                                        \
  31         sprintf(buf, fmt, ##args);                                              \
  32         pack_event_info(US_PROBE_ID, RECORD_ENTRY, "ds", 0x0badc0de, buf);      \
  33 }
  34
  35 struct dentry *dentry_by_path(const char *path)
  36 {
  37         struct dentry *dentry;
  38 #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 38)
  39         struct path st_path;
  40         if (kern_path(path, LOOKUP_FOLLOW, &st_path) != 0) {
  41 #else /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 38) */
  42         struct nameidata nd;
  43         if (path_lookup(path, LOOKUP_FOLLOW, &nd) != 0) {
  44 #endif /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 38) */
  45                 EPRINTF("failed to lookup dentry for path %s!", path);
  46                 return NULL;
  47         }
  48
  49 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
  50         dentry = nd.dentry;
  51         path_release(&nd);
  52 #elif LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 38)
  53         dentry = nd.path.dentry;
  54         path_put(&nd.path);
  55 #else /* LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 38) */
  56         dentry = st_path.dentry;
  57         path_put(&st_path);
  58 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) */
  59         return dentry;
  60 }
  61
  62 void print_vma(struct mm_struct *mm);
  63
  64 void print_vma(struct mm_struct *mm)
  65 {
  66         struct vm_area_struct *vma;
  67         printk("### print_vma: START\n");\
  68         printk("### print_vma: START\n");
  69
  70         for (vma = mm->mmap; vma; vma = vma->vm_next) {
  71                 char *x = vma->vm_flags & VM_EXEC ? "x" : "-";
  72                 char *r = vma->vm_flags & VM_READ ? "r" : "-";
  73                 char *w = vma->vm_flags & VM_WRITE ? "w" : "-";
  74                 char *name = vma->vm_file ? (char *)vma->vm_file->f_dentry->d_iname : "N/A";
  75
  76                 printk("### [%8lx..%8lx] %s%s%s pgoff=\'%8lu\' %s\n",
  77                                 vma->vm_start, vma->vm_end, x, r, w, vma->vm_pgoff, name);
  78         }
  79         printk("### print_vma:  END\n");
  80 }