Changes in uspace/srv/fs/mfs/mfs.h [062d900:fd7dbbb] in mainline

File:

• uspace/srv/fs/mfs/mfs.h (modified) (4 diffs)

uspace/srv/fs/mfs/mfs.h

@@ -44 +44 @@
 #include <errno.h>
 #include <assert.h>
+#include <stdbool.h>
 #include "../../vfs/vfs.h"
 
@@ -57 +58 @@
 #define mfsdebug(...)
 #endif
+
+#define MFS_BMAP_START_BLOCK(sbi, bid) \
+    ((bid) == BMAP_ZONE ? 2 + (sbi)->ibmap_blocks : 2)
+
+#define MFS_BMAP_SIZE_BITS(sbi, bid) \
+    ((bid) == BMAP_ZONE ? (sbi)->nzones - (sbi)->firstdatazone - 1 : \
+    (sbi)->ninodes - 1)
+
+#define MFS_BMAP_SIZE_BLOCKS(sbi, bid) \
+    ((bid) == BMAP_ZONE ? (sbi)->zbmap_blocks : (sbi)->ibmap_blocks)
 
 typedef uint32_t bitchunk_t;
@@ -95 +106 @@
         unsigned isearch;
         unsigned zsearch;
+
+        /* Indicates wether if the cached number of free zones
+         * is to be considered valid or not.
+         */
+        bool nfree_zones_valid;
+        /* Cached number of free zones, used to avoid to scan
+         * the whole bitmap every time the mfs_free_block_count()
+         * is invoked.
+         */
+        unsigned nfree_zones;
 };
 
@@ -201 +222 @@
 mfs_free_zone(struct mfs_instance *inst, uint32_t zone);
 
+extern int
+mfs_count_free_zones(struct mfs_instance *inst, uint32_t *zones);
+
+extern int
+mfs_count_free_inodes(struct mfs_instance *inst, uint32_t *inodes);
+
+
 /* mfs_utils.c */
 extern uint16_t