Changeset 603c1d1f in mainline for uspace/lib/label/src/gpt.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/gpt.c (modified) (7 diffs)

uspace/lib/label/src/gpt.c

@@ -120 +120 @@
         }
 
-        rc = block_read_direct(sid, GPT_HDR_BA, 1, gpt_hdr[0]);
+        rc = block_read_direct(sid, gpt_hdr_ba, 1, gpt_hdr[0]);
         if (rc != EOK) {
                 rc = EIO;
@@ -200 +200 @@
         label->ops = &gpt_label_ops;
         label->ltype = lt_gpt;
-        label->svcid = sid;
+        label->svc_id = sid;
         label->ablock0 = ba_min;
         label->anblocks = ba_max - ba_min + 1;
@@ -206 +206 @@
         label->block_size = bsize;
 
+        label->lt.gpt.hdr_ba[0] = gpt_hdr_ba;
+        label->lt.gpt.hdr_ba[1] = h1ba;
         label->lt.gpt.ptable_ba[0] = ptba[0];
         label->lt.gpt.ptable_ba[1] = ptba[1];
@@ -222 +224 @@
 static int gpt_create(service_id_t sid, label_t **rlabel)
 {
-        return EOK;
+        label_t *label = NULL;
+        gpt_header_t *gpt_hdr = NULL;
+        uint8_t *etable = NULL;
+        size_t bsize;
+        uint32_t num_entries;
+        uint32_t esize;
+        uint64_t ptba[2];
+        uint64_t hdr_ba[2];
+        uint64_t pt_blocks;
+        uint64_t ba_min, ba_max;
+        aoff64_t nblocks;
+        uint64_t resv_blocks;
+        int i, j;
+        int rc;
+
+        rc = block_get_bsize(sid, &bsize);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        if (bsize < 512 || (bsize % 512) != 0) {
+                rc = EINVAL;
+                goto error;
+        }
+
+        rc = block_get_nblocks(sid, &nblocks);
+        if (rc != EOK) {
+                rc = EIO;
+                goto error;
+        }
+
+        /* Number of blocks of a partition table */
+        pt_blocks = gpt_ptable_min_size / bsize;
+        /* Minimum number of reserved (not allocatable) blocks */
+        resv_blocks = 3 + 2 * pt_blocks;
+
+        if (nblocks <= resv_blocks) {
+                rc = ENOSPC;
+                goto error;
+        }
+
+        hdr_ba[0] = gpt_hdr_ba;
+        hdr_ba[1] = nblocks - 1;
+        ptba[0] = 2;
+        ptba[1] = nblocks - 1 - pt_blocks;
+        ba_min = ptba[0] + pt_blocks;
+        ba_max = ptba[1] - 1;
+        esize = sizeof(gpt_entry_t);
+
+        num_entries = pt_blocks * bsize / sizeof(gpt_entry_t);
+
+        for (i = 0; i < 2; i++) {
+                gpt_hdr = calloc(1, bsize);
+                if (gpt_hdr == NULL) {
+                        rc = ENOMEM;
+                        goto error;
+                }
+
+                for (j = 0; j < 8; ++j)
+                        gpt_hdr->efi_signature[j] = efi_signature[j];
+                gpt_hdr->revision = host2uint32_t_le(gpt_revision);
+                gpt_hdr->header_size = host2uint32_t_le(sizeof(gpt_header_t));
+                gpt_hdr->header_crc32 = 0; /* XXX */
+                gpt_hdr->my_lba = host2uint64_t_le(hdr_ba[i]);
+                gpt_hdr->alternate_lba = host2uint64_t_le(hdr_ba[1 - i]);
+                gpt_hdr->first_usable_lba = host2uint64_t_le(ba_min);
+                gpt_hdr->last_usable_lba = host2uint64_t_le(ba_max);
+                //gpt_hdr->disk_guid
+                gpt_hdr->entry_lba = host2uint64_t_le(ptba[i]);
+                gpt_hdr->num_entries = host2uint32_t_le(num_entries);
+                gpt_hdr->entry_size = host2uint32_t_le(esize);
+                gpt_hdr->pe_array_crc32 = 0; /* XXXX */
+
+                rc = block_write_direct(sid, hdr_ba[i], 1, gpt_hdr);
+                if (rc != EOK) {
+                        rc = EIO;
+                        goto error;
+                }
+
+                free(gpt_hdr);
+                gpt_hdr = NULL;
+
+                etable = calloc(num_entries, esize);
+                if (etable == NULL) {
+                        rc = ENOMEM;
+                        goto error;
+                }
+
+                rc = block_write_direct(sid, ptba[i], pt_blocks, etable);
+                if (rc != EOK) {
+                        rc = EIO;
+                        goto error;
+                }
+
+                free(etable);
+                etable = 0;
+        }
+
+        label = calloc(1, sizeof(label_t));
+        if (label == NULL)
+                return ENOMEM;
+
+        list_initialize(&label->parts);
+
+        label->ops = &gpt_label_ops;
+        label->ltype = lt_gpt;
+        label->svc_id = sid;
+        label->ablock0 = ba_min;
+        label->anblocks = ba_max - ba_min + 1;
+        label->pri_entries = num_entries;
+        label->block_size = bsize;
+
+        label->lt.gpt.hdr_ba[0] = hdr_ba[0];
+        label->lt.gpt.hdr_ba[1] = hdr_ba[1];
+        label->lt.gpt.ptable_ba[0] = ptba[0];
+        label->lt.gpt.ptable_ba[1] = ptba[1];
+        label->lt.gpt.esize = esize;
+
+        *rlabel = label;
+        return EOK;
+error:
+        free(etable);
+        free(gpt_hdr);
+        free(label);
+        return rc;
 }
 
 static void gpt_close(label_t *label)
 {
+        label_part_t *part;
+
+        part = gpt_part_first(label);
+        while (part != NULL) {
+                list_remove(&part->llabel);
+                free(part);
+                part = gpt_part_first(label);
+        }
+
         free(label);
 }
@@ -232 +368 @@
 static int gpt_destroy(label_t *label)
 {
-        return EOK;
+        gpt_header_t *gpt_hdr = NULL;
+        uint8_t *etable = NULL;
+        label_part_t *part;
+        uint64_t pt_blocks;
+        int i;
+        int rc;
+
+        part = gpt_part_first(label);
+        if (part != NULL) {
+                rc = ENOTEMPTY;
+                goto error;
+        }
+
+        pt_blocks = label->pri_entries * label->lt.gpt.esize /
+            label->block_size;
+
+        for (i = 0; i < 2; i++) {
+                gpt_hdr = calloc(1, label->block_size);
+                if (gpt_hdr == NULL) {
+                        rc = ENOMEM;
+                        goto error;
+                }
+
+                rc = block_write_direct(label->svc_id, label->lt.gpt.hdr_ba[i],
+                    1, gpt_hdr);
+                if (rc != EOK) {
+                        rc = EIO;
+                        goto error;
+                }
+
+                free(gpt_hdr);
+                gpt_hdr = NULL;
+
+                etable = calloc(label->pri_entries, label->lt.gpt.esize);
+                if (etable == NULL) {
+                        rc = ENOMEM;
+                        goto error;
+                }
+
+                rc = block_write_direct(label->svc_id,
+                    label->lt.gpt.ptable_ba[i], pt_blocks, etable);
+                if (rc != EOK) {
+                        rc = EIO;
+                        goto error;
+                }
+
+                free(etable);
+                etable = 0;
+        }
+
+        free(label);
+        return EOK;
+error:
+        return rc;
 }
 
@@ -426 +615 @@
                     pos / label->block_size;
 
-                rc = block_read_direct(label->svcid, ba, 1, buf);
+                rc = block_read_direct(label->svc_id, ba, 1, buf);
                 if (rc != EOK) {
                         rc = EIO;
@@ -436 +625 @@
                 *e = *pte;
 
-                rc = block_write_direct(label->svcid, ba, 1, buf);
+                rc = block_write_direct(label->svc_id, ba, 1, buf);
                 if (rc != EOK) {
                         rc = EIO;