Plugin df free space as percentage.

Signed-off-by: Florian Forster <octo@collectd.org>

diff --git a/src/df.c b/src/df.c
index ded374b..abb6418 100644 (file)
--- a/src/df.c
+++ b/src/df.c
@@ -54,7 +54,8 @@ static const char *config_keys[] =
        "IgnoreSelected",
        "ReportByDevice",
        "ReportReserved",
-       "ReportInodes"
+       "ReportInodes",
+        "FreePercentage"
 };
 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 
@@ -64,6 +65,7 @@ static ignorelist_t *il_fstype = NULL;
 
 static _Bool by_device = 0;
 static _Bool report_inodes = 0;
+static _Bool report_free_percentage = 0;
 
 static int df_init (void)
 {
@@ -132,6 +134,15 @@ static int df_config (const char *key, const char *value)
                return (0);
        }
 
+       else if (strcasecmp (key, "FreePercentage") == 0)
+       {
+               if (IS_TRUE (value))
+                       report_free_percentage = 1;
+               else
+                       report_free_percentage = 0;
+
+               return (0);
+       }
 
        return (-1);
 }
@@ -186,6 +197,7 @@ static int df_read (void)
                uint64_t blk_free;
                uint64_t blk_reserved;
                uint64_t blk_used;
+               float blk_free_percentage;
 
                if (ignorelist_match (il_device,
                                        (mnt_ptr->spec_device != NULL)
@@ -281,6 +293,16 @@ static int df_read (void)
                df_submit_one (disk_name, "df_complex", "used",
                                (gauge_t) (blk_used * blocksize));
 
+
+               if (report_free_percentage)
+               {
+                   blk_free_percentage  = (float)((statbuf.f_blocks - statbuf.f_bfree) / statbuf.f_blocks * 100);
+                    float diff = statbuf.f_blocks - statbuf.f_bfree;
+                    float div = diff/statbuf.f_blocks ;
+
+                    df_submit_one (disk_name, "df_complex", "free_percentage", 
+                                   (gauge_t) (div * 100));
+               }
                /* inode handling */
                if (report_inodes)
                {