Changeset 6bc542b in mainline for uspace/lib/fdisk/src/fdisk.c

Timestamp:

2015-07-02T21:53:12Z (9 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

99c23405

Parents:

6a0d4ce2

Message:

Allocate and create partition with libfdisk (except actual modification of on-disk label).

File:

• uspace/lib/fdisk/src/fdisk.c (modified) (4 diffs)

uspace/lib/fdisk/src/fdisk.c

@@ -58 +58 @@
 };
 
+static int fdisk_part_spec_prepare(fdisk_dev_t *, fdisk_part_spec_t *,
+    vbd_part_spec_t *);
+
 static void fdisk_dev_info_delete(fdisk_dev_info_t *info)
 {
@@ -497 +500 @@
         int rc;
 
-        part = calloc(1, sizeof(fdisk_part_t));
-        if (part == NULL)
-                return ENOMEM;
-
+        printf("fdisk_part_create()\n");
+
+        rc = fdisk_part_spec_prepare(dev, pspec, &vpspec);
+        if (rc != EOK)
+                return EIO;
+
+        printf("fdisk_part_create() - call vbd_part_create\n");
         rc = vbd_part_create(dev->fdisk->vbd, dev->sid, &vpspec, &partid);
-        if (rc != EOK) {
-                free(part);
-                return EIO;
-        }
-
-        rc = fdisk_part_add(dev, partid, rpart);
+        if (rc != EOK)
+                return EIO;
+
+        printf("fdisk_part_create() - call fdisk_part_add\n");
+        rc = fdisk_part_add(dev, partid, &part);
         if (rc != EOK) {
                 /* Try rolling back */
@@ -514 +519 @@
         }
 
-        (*rpart)->fstype = pspec->fstype;
-        (*rpart)->capacity = pspec->capacity;
-
+        printf("fdisk_part_create() - done\n");
+        part->fstype = pspec->fstype;
+        part->capacity = pspec->capacity;
+
+        if (rpart != NULL)
+                *rpart = part;
         return EOK;
 }
@@ -650 +658 @@
 }
 
+/** Get free partition index. */
+static int fdisk_part_get_free_idx(fdisk_dev_t *dev, int *rindex)
+{
+        link_t *link;
+        fdisk_part_t *part;
+        int nidx;
+
+        link = list_first(&dev->parts_idx);
+        nidx = 1;
+        while (link != NULL) {
+                part = list_get_instance(link, fdisk_part_t, ldev_idx);
+                if (part->index > nidx)
+                        break;
+                nidx = part->index;
+                link = list_next(link, &dev->parts_idx);
+        }
+
+        if (nidx > 4 /* XXXX actual number of slots*/) {
+                return ELIMIT;
+        }
+
+        *rindex = nidx;
+        return EOK;
+}
+
+/** Get free range of blocks.
+ *
+ * Get free range of blocks of at least the specified size (first fit).
+ */
+static int fdisk_part_get_free_range(fdisk_dev_t *dev, aoff64_t nblocks,
+    aoff64_t *rblock0, aoff64_t *rnblocks)
+{
+        link_t *link;
+        fdisk_part_t *part;
+        uint64_t avail;
+        int nba;
+
+        link = list_first(&dev->parts_ba);
+        nba = dev->dinfo.ablock0;
+        while (link != NULL) {
+                part = list_get_instance(link, fdisk_part_t, ldev_ba);
+                if (part->block0 - nba >= nblocks)
+                        break;
+                nba = part->block0 + part->nblocks;
+                link = list_next(link, &dev->parts_ba);
+        }
+
+        if (link != NULL) {
+                /* Free range before a partition */
+                avail = part->block0 - nba;
+        } else {
+                /* Free range at the end */
+                avail = dev->dinfo.ablock0 + dev->dinfo.anblocks - nba;
+
+                /* Verify that the range is large enough */
+                if (avail < nblocks)
+                        return ELIMIT;
+        }
+
+        *rblock0 = nba;
+        *rnblocks = avail;
+        return EOK;
+}
+
+/** Prepare new partition specification for VBD. */
+static int fdisk_part_spec_prepare(fdisk_dev_t *dev, fdisk_part_spec_t *pspec,
+    vbd_part_spec_t *vpspec)
+{
+        uint64_t cbytes;
+        aoff64_t req_blocks;
+        aoff64_t fblock0;
+        aoff64_t fnblocks;
+        uint64_t block_size;
+        unsigned i;
+        int index;
+        int rc;
+
+//      pspec->fstype
+        printf("fdisk_part_spec_prepare()\n");
+        block_size = dev->dinfo.block_size;
+        cbytes = pspec->capacity.value;
+        for (i = 0; i < pspec->capacity.cunit; i++)
+                cbytes = cbytes * 1000;
+
+        req_blocks = (cbytes + block_size - 1) / block_size;
+
+        rc = fdisk_part_get_free_idx(dev, &index);
+        if (rc != EOK)
+                return EIO;
+
+        rc = fdisk_part_get_free_range(dev, req_blocks, &fblock0, &fnblocks);
+        if (rc != EOK)
+                return EIO;
+
+        vpspec->index = index;
+        vpspec->block0 = fblock0;
+        vpspec->nblocks = req_blocks;
+        vpspec->ptype = 42;
+        return EOK;
+}
+
 /** @}
  */