diff options
author | marcel <marcel@FreeBSD.org> | 2014-03-23 19:22:13 +0000 |
---|---|---|
committer | marcel <marcel@FreeBSD.org> | 2014-03-23 19:22:13 +0000 |
commit | 0c6234c0ae7c9a32ed5b7b03bdaca8d24bd683b6 (patch) | |
tree | 49992a946c4d16bb3f1de60aa9ef6f569b73ec71 | |
parent | c9139def6cf23937cb42d6a1e4b0a7026a2d9bdc (diff) | |
download | FreeBSD-src-0c6234c0ae7c9a32ed5b7b03bdaca8d24bd683b6.zip FreeBSD-src-0c6234c0ae7c9a32ed5b7b03bdaca8d24bd683b6.tar.gz |
Implement the BSD scheme. This doesn't quite work as geom_part_bsd
finds an invalid label. I'm not going to worry about that right now,
because there's more to worry about: the BSD disk label has the 'c'
partition for the entire disk and we don't handle this at all.
Note also that the BSD disk label wants a geometry, so this will
have to be revisited anyway once a good solution is in place.
-rw-r--r-- | bsd.c | 67 |
1 files changed, 62 insertions, 5 deletions
@@ -29,13 +29,21 @@ __FBSDID("$FreeBSD$"); #include <sys/types.h> #include <sys/disklabel.h> +#include <sys/endian.h> #include <sys/errno.h> #include <stdlib.h> +#include <string.h> +#include <unistd.h> #include "mkimg.h" #include "scheme.h" static struct mkimg_alias bsd_aliases[] = { + { ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) }, + { ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) }, + { ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) }, + { ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) }, + { ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) }, { ALIAS_NONE, 0 } }; @@ -44,14 +52,62 @@ bsd_metadata(u_int where) { u_int secs; - secs = (where == SCHEME_META_IMG_START) ? 16 : 0; - return (secs); + secs = BBSIZE / secsz; + return ((where == SCHEME_META_IMG_START) ? secs : 0); } static int -bsd_write(int fd __unused, lba_t imgsz __unused, void *bootcode __unused) +bsd_write(int fd, lba_t imgsz, void *bootcode) { - return (ENOSYS); + u_char *buf, *p; + struct disklabel *d; + struct partition *dp; + struct part *part; + int error; + uint16_t checksum; + + buf = malloc(BBSIZE); + if (buf == NULL) + return (ENOMEM); + if (bootcode != NULL) { + memcpy(buf, bootcode, BBSIZE); + memset(buf + LABELSECTOR * secsz, 0, secsz); + } else + memset(buf, 0, BBSIZE); + + d = (void *)(buf + LABELSECTOR * secsz + LABELOFFSET); + le32enc(&d->d_magic, DISKMAGIC); + le32enc(&d->d_secsize, secsz); + le32enc(&d->d_nsectors, 1); /* XXX */ + le32enc(&d->d_ntracks, 1); /* XXX */ + le32enc(&d->d_ncylinders, 0); /* XXX */ + le32enc(&d->d_secpercyl, 1); /* XXX */ + le32enc(&d->d_secperunit, imgsz); + le16enc(&d->d_rpm, 3600); + le32enc(&d->d_magic2, DISKMAGIC); + le16enc(&d->d_npartitions, (8 > nparts) ? 8 : nparts); + le32enc(&d->d_bbsize, BBSIZE); + + STAILQ_FOREACH(part, &partlist, link) { + dp = &d->d_partitions[part->index]; + le32enc(&dp->p_size, part->size); + le32enc(&dp->p_offset, part->block); + dp->p_fstype = ALIAS_TYPE2INT(part->type); + } + + dp = &d->d_partitions[nparts]; + checksum = 0; + for (p = buf; p < (u_char *)dp; p += 2) + checksum ^= le16dec(p); + le16enc(&d->d_checksum, checksum); + + error = mkimg_seek(fd, 0); + if (error == 0) { + if (write(fd, buf, BBSIZE) != BBSIZE) + error = errno; + } + free(buf); + return (error); } static struct mkimg_scheme bsd_scheme = { @@ -60,7 +116,8 @@ static struct mkimg_scheme bsd_scheme = { .aliases = bsd_aliases, .metadata = bsd_metadata, .write = bsd_write, - .nparts = 20 + .nparts = 20, + .bootcode = BBSIZE }; SCHEME_DEFINE(bsd_scheme); |