Changeset 603c1d1f in mainline for uspace/lib/label/src/mbr.c

Timestamp:

2015-07-05T18:53:00Z (9 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

bf7ddde

Parents:

99c23405

Message:

Persistent partition table creation and destruction.

File:

• uspace/lib/label/src/mbr.c (modified) (5 diffs)

uspace/lib/label/src/mbr.c

@@ -142 +142 @@
         label->ops = &mbr_label_ops;
         label->ltype = lt_mbr;
+        label->svc_id = sid;
+        label->block_size = bsize;
         label->ablock0 = mbr_ablock0;
         label->anblocks = nblocks - mbr_ablock0;
@@ -155 +157 @@
 static int mbr_create(service_id_t sid, label_t **rlabel)
 {
-        return EOK;
+        label_t *label = NULL;
+        mbr_br_block_t *mbr = NULL;
+        aoff64_t nblocks;
+        size_t bsize;
+        int i;
+        int rc;
+
+        rc = block_get_bsize(sid, &bsize);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        rc = block_get_nblocks(sid, &nblocks);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        mbr = calloc(1, bsize);
+        if (mbr == NULL) {
+                rc = ENOMEM;
+                goto error;
+        }
+
+        label = calloc(1, sizeof(label_t));
+        if (label == NULL)
+                return ENOMEM;
+
+        list_initialize(&label->parts);
+
+        mbr->media_id = 0;
+        mbr->pad0 = 0;
+        for (i = 0; i < mbr_nprimary; i++)
+                mbr_unused_pte(&mbr->pte[i]);
+        mbr->signature = host2uint16_t_le(mbr_br_signature);
+
+        rc = block_write_direct(sid, mbr_ba, 1, mbr);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        free(mbr);
+        mbr = NULL;
+
+        label->ops = &mbr_label_ops;
+        label->ltype = lt_mbr;
+        label->block_size = bsize;
+        label->svc_id = sid;
+        label->ablock0 = mbr_ablock0;
+        label->anblocks = nblocks - mbr_ablock0;
+        label->pri_entries = mbr_nprimary;
+
+        *rlabel = label;
+        return EOK;
+error:
+        free(mbr);
+        free(label);
+        return rc;
 }
 
 static void mbr_close(label_t *label)
 {
+        label_part_t *part;
+
+        part = mbr_part_first(label);
+        while (part != NULL) {
+                list_remove(&part->llabel);
+                free(part);
+
+                part = mbr_part_first(label);
+        }
+
         free(label);
 }
@@ -165 +236 @@
 static int mbr_destroy(label_t *label)
 {
-        return EOK;
+        mbr_br_block_t *mbr = NULL;
+        label_part_t *part;
+        int rc;
+
+        part = mbr_part_first(label);
+        if (part != NULL) {
+                rc = ENOTEMPTY;
+                goto error;
+        }
+
+        mbr = calloc(1, label->block_size);
+        if (mbr == NULL) {
+                rc = ENOMEM;
+                goto error;
+        }
+
+        rc = block_write_direct(label->svc_id, mbr_ba, 1, mbr);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        free(mbr);
+        mbr = NULL;
+
+        free(label);
+        return EOK;
+error:
+        free(mbr);
+        return rc;
 }
 
@@ -340 +440 @@
                 return ENOMEM;
 
-        rc = block_read_direct(label->svcid, mbr_ba, 1, br);
+        rc = block_read_direct(label->svc_id, mbr_ba, 1, br);
         if (rc != EOK) {
                 rc = EIO;
@@ -348 +448 @@
         br->pte[index] = *pte;
 
-        rc = block_write_direct(label->svcid, mbr_ba, 1, br);
+        rc = block_write_direct(label->svc_id, mbr_ba, 1, br);
         if (rc != EOK) {
                 rc = EIO;