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authorphk <phk@FreeBSD.org>2003-04-17 08:41:08 +0000
committerphk <phk@FreeBSD.org>2003-04-17 08:41:08 +0000
commit52a551e4c5e52ca9df95a65b82e6e31e39f27648 (patch)
tree05e228b784395cbac4ae059949d4273ec5d901b2 /sys
parent1bc9e58dac87a3728201ca739f20f1a31595c34a (diff)
downloadFreeBSD-src-52a551e4c5e52ca9df95a65b82e6e31e39f27648.zip
FreeBSD-src-52a551e4c5e52ca9df95a65b82e6e31e39f27648.tar.gz
These two files fell off during my previous commit: put the encoding
decoding functions for struct disklabel in a separate .c file.
Diffstat (limited to 'sys')
-rw-r--r--sys/geom/geom_bsd.c130
-rw-r--r--sys/geom/geom_bsd_enc.c161
2 files changed, 166 insertions, 125 deletions
diff --git a/sys/geom/geom_bsd.c b/sys/geom/geom_bsd.c
index d50a040..b812e9a 100644
--- a/sys/geom/geom_bsd.c
+++ b/sys/geom/geom_bsd.c
@@ -72,126 +72,6 @@ struct g_bsd_softc {
u_char labelsum[16];
};
-/*
- * The next 4 functions isolate us from how the compiler lays out and pads
- * "struct disklabel". We treat what we read from disk as a bytestream and
- * explicitly convert it into a struct disklabel. This makes us compiler-
- * endianness- and wordsize- agnostic.
- * For now we only have little-endian formats to deal with.
- */
-
-static void
-g_bsd_ledec_partition(u_char *ptr, struct partition *d)
-{
- d->p_size = le32dec(ptr + 0);
- d->p_offset = le32dec(ptr + 4);
- d->p_fsize = le32dec(ptr + 8);
- d->p_fstype = ptr[12];
- d->p_frag = ptr[13];
- d->p_cpg = le16dec(ptr + 14);
-}
-
-static void
-g_bsd_ledec_disklabel(u_char *ptr, struct disklabel *d)
-{
- int i;
-
- d->d_magic = le32dec(ptr + 0);
- d->d_type = le16dec(ptr + 4);
- d->d_subtype = le16dec(ptr + 6);
- bcopy(ptr + 8, d->d_typename, 16);
- bcopy(ptr + 24, d->d_packname, 16);
- d->d_secsize = le32dec(ptr + 40);
- d->d_nsectors = le32dec(ptr + 44);
- d->d_ntracks = le32dec(ptr + 48);
- d->d_ncylinders = le32dec(ptr + 52);
- d->d_secpercyl = le32dec(ptr + 56);
- d->d_secperunit = le32dec(ptr + 60);
- d->d_sparespertrack = le16dec(ptr + 64);
- d->d_sparespercyl = le16dec(ptr + 66);
- d->d_acylinders = le32dec(ptr + 68);
- d->d_rpm = le16dec(ptr + 72);
- d->d_interleave = le16dec(ptr + 74);
- d->d_trackskew = le16dec(ptr + 76);
- d->d_cylskew = le16dec(ptr + 78);
- d->d_headswitch = le32dec(ptr + 80);
- d->d_trkseek = le32dec(ptr + 84);
- d->d_flags = le32dec(ptr + 88);
- d->d_drivedata[0] = le32dec(ptr + 92);
- d->d_drivedata[1] = le32dec(ptr + 96);
- d->d_drivedata[2] = le32dec(ptr + 100);
- d->d_drivedata[3] = le32dec(ptr + 104);
- d->d_drivedata[4] = le32dec(ptr + 108);
- d->d_spare[0] = le32dec(ptr + 112);
- d->d_spare[1] = le32dec(ptr + 116);
- d->d_spare[2] = le32dec(ptr + 120);
- d->d_spare[3] = le32dec(ptr + 124);
- d->d_spare[4] = le32dec(ptr + 128);
- d->d_magic2 = le32dec(ptr + 132);
- d->d_checksum = le16dec(ptr + 136);
- d->d_npartitions = le16dec(ptr + 138);
- d->d_bbsize = le32dec(ptr + 140);
- d->d_sbsize = le32dec(ptr + 144);
- for (i = 0; i < MAXPARTITIONS; i++)
- g_bsd_ledec_partition(ptr + 148 + 16 * i, &d->d_partitions[i]);
-}
-
-static void
-g_bsd_leenc_partition(u_char *ptr, struct partition *d)
-{
- le32enc(ptr + 0, d->p_size);
- le32enc(ptr + 4, d->p_offset);
- le32enc(ptr + 8, d->p_fsize);
- ptr[12] = d->p_fstype;
- ptr[13] = d->p_frag;
- le16enc(ptr + 14, d->p_cpg);
-}
-
-static void
-g_bsd_leenc_disklabel(u_char *ptr, struct disklabel *d)
-{
- int i;
-
- le32enc(ptr + 0, d->d_magic);
- le16enc(ptr + 4, d->d_type);
- le16enc(ptr + 6, d->d_subtype);
- bcopy(d->d_typename, ptr + 8, 16);
- bcopy(d->d_packname, ptr + 24, 16);
- le32enc(ptr + 40, d->d_secsize);
- le32enc(ptr + 44, d->d_nsectors);
- le32enc(ptr + 48, d->d_ntracks);
- le32enc(ptr + 52, d->d_ncylinders);
- le32enc(ptr + 56, d->d_secpercyl);
- le32enc(ptr + 60, d->d_secperunit);
- le16enc(ptr + 64, d->d_sparespertrack);
- le16enc(ptr + 66, d->d_sparespercyl);
- le32enc(ptr + 68, d->d_acylinders);
- le16enc(ptr + 72, d->d_rpm);
- le16enc(ptr + 74, d->d_interleave);
- le16enc(ptr + 76, d->d_trackskew);
- le16enc(ptr + 78, d->d_cylskew);
- le32enc(ptr + 80, d->d_headswitch);
- le32enc(ptr + 84, d->d_trkseek);
- le32enc(ptr + 88, d->d_flags);
- le32enc(ptr + 92, d->d_drivedata[0]);
- le32enc(ptr + 96, d->d_drivedata[1]);
- le32enc(ptr + 100, d->d_drivedata[2]);
- le32enc(ptr + 104, d->d_drivedata[3]);
- le32enc(ptr + 108, d->d_drivedata[4]);
- le32enc(ptr + 112, d->d_spare[0]);
- le32enc(ptr + 116, d->d_spare[1]);
- le32enc(ptr + 120, d->d_spare[2]);
- le32enc(ptr + 124, d->d_spare[3]);
- le32enc(ptr + 128, d->d_spare[4]);
- le32enc(ptr + 132, d->d_magic2);
- le16enc(ptr + 136, d->d_checksum);
- le16enc(ptr + 138, d->d_npartitions);
- le32enc(ptr + 140, d->d_bbsize);
- le32enc(ptr + 144, d->d_sbsize);
- for (i = 0; i < MAXPARTITIONS; i++)
- g_bsd_leenc_partition(ptr + 148 + 16 * i, &d->d_partitions[i]);
-}
-
static int
g_bsd_ondisk_size(void)
{
@@ -437,7 +317,7 @@ g_bsd_try(struct g_geom *gp, struct g_slicer *gsp, struct g_consumer *cp, int se
/* Decode into our native format. */
dl = &ms->ondisk;
- g_bsd_ledec_disklabel(buf + secoff, dl);
+ bsd_disklabel_le_dec(buf + secoff, dl);
ondisk2inram(ms);
@@ -528,7 +408,7 @@ g_bsd_ioctl(void *arg, int flag)
return;
}
dl = &ms->ondisk;
- g_bsd_leenc_disklabel(buf + secoff, dl);
+ bsd_disklabel_le_enc(buf + secoff, dl);
if (ms->labeloffset == ALPHA_LABEL_OFFSET) {
sum = 0;
for (i = 0; i < 63; i++)
@@ -582,7 +462,7 @@ g_bsd_diocbsdbb(dev_t dev, u_long cmd __unused, caddr_t data, int fflag __unused
cp = LIST_FIRST(&gp->consumer);
secsize = cp->provider->sectorsize;
dl = &ms->ondisk;
- g_bsd_leenc_disklabel(buf + ms->labeloffset, dl);
+ bsd_disklabel_le_enc(buf + ms->labeloffset, dl);
if (ms->labeloffset == ALPHA_LABEL_OFFSET) {
sum = 0;
for (i = 0; i < 63; i++)
@@ -622,7 +502,7 @@ g_bsd_hotwrite(void *arg, int flag)
gsl = &gsp->slices[bp->bio_to->index];
p = (u_char*)bp->bio_data + ms->labeloffset
- (bp->bio_offset + gsl->offset);
- g_bsd_ledec_disklabel(p, &fake.ondisk);
+ bsd_disklabel_le_dec(p, &fake.ondisk);
ondisk2inram(&fake);
if (g_bsd_checklabel(&fake.inram)) {
@@ -643,7 +523,7 @@ g_bsd_hotwrite(void *arg, int flag)
/* Update our copy of the disklabel. */
ms->inram = fake.inram;
inram2ondisk(ms);
- g_bsd_leenc_disklabel(p, &ms->ondisk);
+ bsd_disklabel_le_enc(p, &ms->ondisk);
g_slice_finish_hot(bp);
}
diff --git a/sys/geom/geom_bsd_enc.c b/sys/geom/geom_bsd_enc.c
new file mode 100644
index 0000000..46415b8
--- /dev/null
+++ b/sys/geom/geom_bsd_enc.c
@@ -0,0 +1,161 @@
+/*-
+ * Copyright (c) 2002 Poul-Henning Kamp
+ * Copyright (c) 2002 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by Poul-Henning Kamp
+ * and NAI Labs, the Security Research Division of Network Associates, Inc.
+ * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
+ * DARPA CHATS research program.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the authors may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ * Functions to encode and decode struct disklabel and struct partition into
+ * a bytestream of little endianess and correct packing.
+ *
+ * NB! This file must be usable both in kernel and userland.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/endian.h>
+#include <sys/disklabel.h>
+#ifdef _KERNEL
+#include <sys/systm.h>
+#endif
+
+void
+bsd_partition_le_dec(u_char *ptr, struct partition *d)
+{
+ d->p_size = le32dec(ptr + 0);
+ d->p_offset = le32dec(ptr + 4);
+ d->p_fsize = le32dec(ptr + 8);
+ d->p_fstype = ptr[12];
+ d->p_frag = ptr[13];
+ d->p_cpg = le16dec(ptr + 14);
+}
+
+void
+bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d)
+{
+ int i;
+
+ d->d_magic = le32dec(ptr + 0);
+ d->d_type = le16dec(ptr + 4);
+ d->d_subtype = le16dec(ptr + 6);
+ bcopy(ptr + 8, d->d_typename, 16);
+ bcopy(ptr + 24, d->d_packname, 16);
+ d->d_secsize = le32dec(ptr + 40);
+ d->d_nsectors = le32dec(ptr + 44);
+ d->d_ntracks = le32dec(ptr + 48);
+ d->d_ncylinders = le32dec(ptr + 52);
+ d->d_secpercyl = le32dec(ptr + 56);
+ d->d_secperunit = le32dec(ptr + 60);
+ d->d_sparespertrack = le16dec(ptr + 64);
+ d->d_sparespercyl = le16dec(ptr + 66);
+ d->d_acylinders = le32dec(ptr + 68);
+ d->d_rpm = le16dec(ptr + 72);
+ d->d_interleave = le16dec(ptr + 74);
+ d->d_trackskew = le16dec(ptr + 76);
+ d->d_cylskew = le16dec(ptr + 78);
+ d->d_headswitch = le32dec(ptr + 80);
+ d->d_trkseek = le32dec(ptr + 84);
+ d->d_flags = le32dec(ptr + 88);
+ d->d_drivedata[0] = le32dec(ptr + 92);
+ d->d_drivedata[1] = le32dec(ptr + 96);
+ d->d_drivedata[2] = le32dec(ptr + 100);
+ d->d_drivedata[3] = le32dec(ptr + 104);
+ d->d_drivedata[4] = le32dec(ptr + 108);
+ d->d_spare[0] = le32dec(ptr + 112);
+ d->d_spare[1] = le32dec(ptr + 116);
+ d->d_spare[2] = le32dec(ptr + 120);
+ d->d_spare[3] = le32dec(ptr + 124);
+ d->d_spare[4] = le32dec(ptr + 128);
+ d->d_magic2 = le32dec(ptr + 132);
+ d->d_checksum = le16dec(ptr + 136);
+ d->d_npartitions = le16dec(ptr + 138);
+ d->d_bbsize = le32dec(ptr + 140);
+ d->d_sbsize = le32dec(ptr + 144);
+ for (i = 0; i < MAXPARTITIONS; i++)
+ bsd_partition_le_dec(ptr + 148 + 16 * i, &d->d_partitions[i]);
+}
+
+void
+bsd_partition_le_enc(u_char *ptr, struct partition *d)
+{
+ le32enc(ptr + 0, d->p_size);
+ le32enc(ptr + 4, d->p_offset);
+ le32enc(ptr + 8, d->p_fsize);
+ ptr[12] = d->p_fstype;
+ ptr[13] = d->p_frag;
+ le16enc(ptr + 14, d->p_cpg);
+}
+
+void
+bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d)
+{
+ int i;
+
+ le32enc(ptr + 0, d->d_magic);
+ le16enc(ptr + 4, d->d_type);
+ le16enc(ptr + 6, d->d_subtype);
+ bcopy(d->d_typename, ptr + 8, 16);
+ bcopy(d->d_packname, ptr + 24, 16);
+ le32enc(ptr + 40, d->d_secsize);
+ le32enc(ptr + 44, d->d_nsectors);
+ le32enc(ptr + 48, d->d_ntracks);
+ le32enc(ptr + 52, d->d_ncylinders);
+ le32enc(ptr + 56, d->d_secpercyl);
+ le32enc(ptr + 60, d->d_secperunit);
+ le16enc(ptr + 64, d->d_sparespertrack);
+ le16enc(ptr + 66, d->d_sparespercyl);
+ le32enc(ptr + 68, d->d_acylinders);
+ le16enc(ptr + 72, d->d_rpm);
+ le16enc(ptr + 74, d->d_interleave);
+ le16enc(ptr + 76, d->d_trackskew);
+ le16enc(ptr + 78, d->d_cylskew);
+ le32enc(ptr + 80, d->d_headswitch);
+ le32enc(ptr + 84, d->d_trkseek);
+ le32enc(ptr + 88, d->d_flags);
+ le32enc(ptr + 92, d->d_drivedata[0]);
+ le32enc(ptr + 96, d->d_drivedata[1]);
+ le32enc(ptr + 100, d->d_drivedata[2]);
+ le32enc(ptr + 104, d->d_drivedata[3]);
+ le32enc(ptr + 108, d->d_drivedata[4]);
+ le32enc(ptr + 112, d->d_spare[0]);
+ le32enc(ptr + 116, d->d_spare[1]);
+ le32enc(ptr + 120, d->d_spare[2]);
+ le32enc(ptr + 124, d->d_spare[3]);
+ le32enc(ptr + 128, d->d_spare[4]);
+ le32enc(ptr + 132, d->d_magic2);
+ le16enc(ptr + 136, d->d_checksum);
+ le16enc(ptr + 138, d->d_npartitions);
+ le32enc(ptr + 140, d->d_bbsize);
+ le32enc(ptr + 144, d->d_sbsize);
+ for (i = 0; i < MAXPARTITIONS; i++)
+ bsd_partition_le_enc(ptr + 148 + 16 * i, &d->d_partitions[i]);
+}
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