Author: kientzle
Date: Tue May 1 05:04:49 2012
New Revision: 234860
URL: http://svn.freebsd.org/changeset/base/234860
Log:
Teach ubldr(8) about simple MBR partitioning.
Modified:
head/sys/boot/uboot/lib/devicename.c
head/sys/boot/uboot/lib/disk.c
head/sys/boot/uboot/lib/libuboot.h
Modified: head/sys/boot/uboot/lib/devicename.c
==============================================================================
--- head/sys/boot/uboot/lib/devicename.c Tue May 1 04:35:53 2012
(r234859)
+++ head/sys/boot/uboot/lib/devicename.c Tue May 1 05:04:49 2012
(r234860)
@@ -131,6 +131,10 @@ uboot_parsedev(struct uboot_devdesc **de
*(cp + 1) != ':') {
pnum = strtol(cp + 1, &cp, 10);
ptype = PTYPE_GPT;
+ } else if (*cp == 's' && *(cp + 1) &&
+ *(cp + 1) != ':') {
+ pnum = strtol(cp + 1, &cp, 10);
+ ptype = PTYPE_MBR;
} else {
pnum = *cp - 'a';
ptype = PTYPE_BSDLABEL;
@@ -218,6 +222,9 @@ uboot_fmtdev(void *vdev)
else if (dev->d_kind.disk.ptype == PTYPE_GPT)
cp += sprintf(cp, "p%i",
dev->d_kind.disk.pnum);
+ else if (dev->d_kind.disk.ptype == PTYPE_MBR)
+ cp += sprintf(cp, "s%i",
+ dev->d_kind.disk.pnum);
}
strcat(cp, ":");
Modified: head/sys/boot/uboot/lib/disk.c
==============================================================================
--- head/sys/boot/uboot/lib/disk.c Tue May 1 04:35:53 2012
(r234859)
+++ head/sys/boot/uboot/lib/disk.c Tue May 1 05:04:49 2012
(r234860)
@@ -398,6 +398,94 @@ out:
}
static int
+stor_open_mbr(struct open_dev *od, struct uboot_devdesc *dev)
+{
+ char *buf = NULL;
+ struct dos_partition *dp;
+ int err, i, part;
+
+ od->od_nparts = 0;
+ od->od_partitions = NULL;
+
+ /* Block size must be at least 512 bytes. */
+ if (od->od_bsize < 512)
+ return (ENXIO);
+
+ /* Read MBR */
+ buf = malloc(od->od_bsize);
+ if (!buf) {
+ stor_printf("could not allocate memory for MBR\n");
+ return (ENOMEM);
+ }
+ err = stor_readdev(dev, 0, 1, buf);
+ if (err) {
+ stor_printf("MBR read error=%d\n", err);
+ err = EIO;
+ goto out;
+ }
+
+ /* Check the slice table magic. */
+ if (le16toh(*((uint16_t *)(buf + DOSMAGICOFFSET))) != DOSMAGIC) {
+ err = ENXIO;
+ goto out;
+ }
+
+ /* Save information about partitions. */
+ dp = (struct dos_partition *)(buf + DOSPARTOFF);
+ od->od_partitions = calloc(NDOSPART, sizeof(struct gpt_part));
+ if (!od->od_partitions) {
+ stor_printf("could not allocate memory for MBR partitions\n");
+ err = ENOMEM;
+ goto out;
+ }
+
+ part = 0;
+ for (i = 0; i < NDOSPART; i++) {
+ u_int32_t start = le32dec(&dp[i].dp_start);
+ u_int32_t size = le32dec(&dp[i].dp_size);
+ uuid_t *u = NULL;
+
+ /* Map MBR partition types to GPT partition types. */
+ switch (dp[i].dp_typ) {
+ case DOSPTYP_386BSD:
+ u = &freebsd_ufs;
+ break;
+ /* XXX Other types XXX */
+ }
+
+ if (u) {
+ od->od_partitions[part].gp_type = *u;
+ od->od_partitions[part].gp_index = i + 1;
+ od->od_partitions[part].gp_start = start;
+ od->od_partitions[part].gp_end = start + size;
+ part += 1;
+ }
+ }
+ od->od_nparts = part;
+
+ if (od->od_nparts == 0) {
+ err = EINVAL;
+ goto out;
+ }
+
+ dev->d_disk.ptype = PTYPE_MBR;
+
+ /* XXX Be smarter here? XXX */
+ if (dev->d_disk.pnum == 0)
+ dev->d_disk.pnum = od->od_partitions[0].gp_index;
+
+ for (i = 0; i < od->od_nparts; i++)
+ if (od->od_partitions[i].gp_index == dev->d_disk.pnum)
+ od->od_bstart = od->od_partitions[i].gp_start;
+
+out:
+ if (err && od->od_partitions)
+ free(od->od_partitions);
+ free(buf);
+ return (err);
+}
+
+static int
stor_open_bsdlabel(struct open_dev *od, struct uboot_devdesc *dev)
{
char *buf;
@@ -443,7 +531,7 @@ stor_readdev(struct uboot_devdesc *dev,
lbasize_t real_size;
int err, handle;
- debugf("reading size=%d @ 0x%08x\n", size, (uint32_t)buf);
+ debugf("reading blk=%d size=%d @ 0x%08x\n", (int)blk, size,
(uint32_t)buf);
handle = stor_info[dev->d_unit];
err = ub_dev_read(handle, buf, size, blk, &real_size);
@@ -495,7 +583,10 @@ stor_opendev(struct open_dev **odp, stru
od->od_bsize = di->di_stor.block_size;
od->od_bstart = 0;
- if ((err = stor_open_gpt(od, dev)) != 0)
+ err = stor_open_gpt(od, dev);
+ if (err != 0)
+ err = stor_open_mbr(od, dev);
+ if (err != 0)
err = stor_open_bsdlabel(od, dev);
if (err != 0)
@@ -517,6 +608,8 @@ stor_closedev(struct uboot_devdesc *dev)
od = (struct open_dev *)dev->d_disk.data;
if (dev->d_disk.ptype == PTYPE_GPT && od->od_nparts != 0)
free(od->od_partitions);
+ if (dev->d_disk.ptype == PTYPE_MBR && od->od_nparts != 0)
+ free(od->od_partitions);
free(od);
dev->d_disk.data = NULL;
Modified: head/sys/boot/uboot/lib/libuboot.h
==============================================================================
--- head/sys/boot/uboot/lib/libuboot.h Tue May 1 04:35:53 2012
(r234859)
+++ head/sys/boot/uboot/lib/libuboot.h Tue May 1 05:04:49 2012
(r234860)
@@ -45,6 +45,7 @@ struct uboot_devdesc
#define PTYPE_BSDLABEL 1
#define PTYPE_GPT 2
+#define PTYPE_MBR 3
/*
* Default network packet alignment in memory
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