- if (report_reserved)
- {
- uint64_t blk_free;
- uint64_t blk_reserved;
- uint64_t blk_used;
-
- /* Sanity-check for the values in the struct */
- if (statbuf.f_bfree < statbuf.f_bavail)
- statbuf.f_bfree = statbuf.f_bavail;
- if (statbuf.f_blocks < statbuf.f_bfree)
- statbuf.f_blocks = statbuf.f_bfree;
-
- blk_free = (uint64_t) statbuf.f_bavail;
- blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
- blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
-
- df_submit_one (disk_name, "df_complex", "free",
- (gauge_t) (blk_free * blocksize));
- df_submit_one (disk_name, "df_complex", "reserved",
- (gauge_t) (blk_reserved * blocksize));
- df_submit_one (disk_name, "df_complex", "used",
- (gauge_t) (blk_used * blocksize));
- }
- else /* compatibility code */
- {
- gauge_t df_free;
- gauge_t df_used;
-
- df_free = statbuf.f_bfree * blocksize;
- df_used = (statbuf.f_blocks - statbuf.f_bfree) * blocksize;
-
- df_submit_two (disk_name, "df", df_used, df_free);
- }
+ /*
+ * Sanity-check for the values in the struct
+ */
+ /* Check for negative "available" byes. For example UFS can
+ * report negative free space for user. Notice. blk_reserved
+ * will start to diminish after this. */
+#if HAVE_STATVFS
+ /* Cast and temporary variable are needed to avoid
+ * compiler warnings.
+ * ((struct statvfs).f_bavail is unsigned (POSIX)) */
+ int64_t signed_bavail = (int64_t) statbuf.f_bavail;
+ if (signed_bavail < 0)
+ statbuf.f_bavail = 0;
+#elif HAVE_STATFS
+ if (statbuf.f_bavail < 0)
+ statbuf.f_bavail = 0;
+#endif
+ /* Make sure that f_blocks >= f_bfree >= f_bavail */
+ if (statbuf.f_bfree < statbuf.f_bavail)
+ statbuf.f_bfree = statbuf.f_bavail;
+ if (statbuf.f_blocks < statbuf.f_bfree)
+ statbuf.f_blocks = statbuf.f_bfree;
+
+ blk_free = (uint64_t) statbuf.f_bavail;
+ blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
+ blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
+
+ df_submit_one (disk_name, "df_complex", "free",
+ (gauge_t) (blk_free * blocksize));
+ df_submit_one (disk_name, "df_complex", "reserved",
+ (gauge_t) (blk_reserved * blocksize));
+ df_submit_one (disk_name, "df_complex", "used",
+ (gauge_t) (blk_used * blocksize));