Pileus Git - ~andy/linux/blob - drivers/staging/zcache/ramster/debug.c

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