Changeset e6aaa59 in mainline

Timestamp:

2011-03-06T17:01:25Z (14 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9cfe0d5

Parents:

4cee3944

Message:

initialize bitmaps

File:

• uspace/app/mkminix/mkminix.c (modified) (6 diffs)

uspace/app/mkminix/mkminix.c

@@ -52 +52 @@
 #define NAME    "mkminix"
 
+#define FREE    0
+#define USED    1
+
 typedef enum {
         HELP_SHORT,
@@ -70 +73 @@
 static void     setup_superblock(struct mfs_superblock *sb, mfs_params_t *opt);
 static void     setup_superblock_v3(struct mfs3_superblock *sb, mfs_params_t *opt);
+static void     setup_bitmaps(devmap_handle_t handle, uint32_t ninodes, uint32_t nzones);
+static void     mark_bmap(uint8_t *bmap, int idx, int v);
 
 static struct option const long_options[] = {
@@ -108 +113 @@
 
         for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
-                c = getopt_long(argc, argv, "eh123b:i:", long_options, &opt_ind);
+                c = getopt_long(argc, argv, "lh123b:i:", long_options, &opt_ind);
                 switch (c) {
                 case 'h':
@@ -207 +212 @@
                 }
                 setup_superblock_v3(sb3, &opt);
+                setup_bitmaps(handle, sb3->s_ninodes, sb3->s_total_zones);
         } else {
                 sb = (struct mfs_superblock *) malloc(sizeof(struct mfs_superblock));
@@ -215 +221 @@
                 setup_superblock(sb, &opt);
                 block_write_direct(handle, MFS_SUPERBLOCK, 1, sb);
+                setup_bitmaps(handle, sb->s_ninodes, sb->s_nzones);
         }
 
@@ -284 +291 @@
 }
 
+static void setup_bitmaps(devmap_handle_t handle, uint32_t ninodes, uint32_t nzones)
+{
+        uint8_t *ibmap_buf, *zbmap_buf;
+        int ibmap_nblocks = 1 + (ninodes / 8) / MFS_BLOCKSIZE;
+        int zbmap_nblocks = 1 + (nzones / 8) / MFS_BLOCKSIZE;
+        unsigned int i;
+
+        ibmap_buf = (uint8_t *) malloc(ibmap_nblocks * MFS_BLOCKSIZE);
+        zbmap_buf = (uint8_t *) malloc(zbmap_nblocks * MFS_BLOCKSIZE);
+
+        memset(ibmap_buf, 0xFF, ibmap_nblocks * MFS_BLOCKSIZE);
+        memset(zbmap_buf, 0xFF, zbmap_nblocks * MFS_BLOCKSIZE);
+
+        for (i = 2; i < ninodes; ++i) {
+                mark_bmap(ibmap_buf, i, FREE);
+                mark_bmap(zbmap_buf, i, FREE);
+        }
+
+        block_write_direct(handle, 2, ibmap_nblocks, ibmap_buf);
+        block_write_direct(handle, 2 + ibmap_nblocks, zbmap_nblocks, zbmap_buf);
+}
+
+static void mark_bmap(uint8_t *bmap, int idx, int v)
+{
+        if (v == FREE)
+                bmap[idx / 8] &= ~(1 << (idx % 8));
+        else
+                bmap[idx / 8] |= 1 << (idx % 8);
+}
+
 static void help_cmd_mkminix(help_level_t level)
 {