drivers/staging/zcache/ramster/debug.c

   1 #include <linux/atomic.h>
   2 #include "debug.h"
   3
   4 ssize_t ramster_foreign_eph_pages;
   5 ssize_t ramster_foreign_pers_pages;
   6 #ifdef CONFIG_DEBUG_FS
   7 #include <linux/debugfs.h>
   8
   9 ssize_t ramster_eph_pages_remoted;
  10 ssize_t ramster_pers_pages_remoted;
  11 ssize_t ramster_eph_pages_remote_failed;
  12 ssize_t ramster_pers_pages_remote_failed;
  13 ssize_t ramster_remote_eph_pages_succ_get;
  14 ssize_t ramster_remote_pers_pages_succ_get;
  15 ssize_t ramster_remote_eph_pages_unsucc_get;
  16 ssize_t ramster_remote_pers_pages_unsucc_get;
  17 ssize_t ramster_pers_pages_remote_nomem;
  18 ssize_t ramster_remote_objects_flushed;
  19 ssize_t ramster_remote_object_flushes_failed;
  20 ssize_t ramster_remote_pages_flushed;
  21 ssize_t ramster_remote_page_flushes_failed;
  22
  23 #define ATTR(x)  { .name = #x, .val = &ramster_##x, }
  24 static struct debug_entry {
  25         const char *name;
  26         ssize_t *val;
  27 } attrs[] = {
  28         ATTR(eph_pages_remoted),
  29         ATTR(pers_pages_remoted),
  30         ATTR(eph_pages_remote_failed),
  31         ATTR(pers_pages_remote_failed),
  32         ATTR(remote_eph_pages_succ_get),
  33         ATTR(remote_pers_pages_succ_get),
  34         ATTR(remote_eph_pages_unsucc_get),
  35         ATTR(remote_pers_pages_unsucc_get),
  36         ATTR(pers_pages_remote_nomem),
  37         ATTR(remote_objects_flushed),
  38         ATTR(remote_pages_flushed),
  39         ATTR(remote_object_flushes_failed),
  40         ATTR(remote_page_flushes_failed),
  41         ATTR(foreign_eph_pages),
  42         ATTR(foreign_eph_pages_max),
  43         ATTR(foreign_pers_pages),
  44         ATTR(foreign_pers_pages_max),
  45 };
  46 #undef ATTR
  47
  48 int ramster_debugfs_init(void)
  49 {
  50         int i;
  51         struct dentry *root = debugfs_create_dir("ramster", NULL);
  52         if (root == NULL)
  53                 return -ENXIO;
  54
  55         for (i = 0; i < ARRAY_SIZE(attrs); i++)
  56                 if (!debugfs_create_size_t(attrs[i].name,
  57                                 S_IRUGO, root, attrs[i].val))
  58                         goto out;
  59         return 0;
  60 out:
  61         return -ENODEV;
  62 }
  63 #else
  64 static inline int ramster_debugfs_init(void)
  65 {
  66         return 0;
  67 }
  68 #endif