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Differential D27225 Diff 79692 sys/geom/part/g_part_gpt.c

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sys/geom/part/g_part_gpt.c

Show First 20 Lines • Show All 546 Lines • ▼ Show 20 Linesgpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
pp = cp->provider; pp = cp->provider;
table->lba[elt] = hdr->hdr_lba_table; table->lba[elt] = hdr->hdr_lba_table;
table->state[elt] = GPT_STATE_MISSING; table->state[elt] = GPT_STATE_MISSING;
tblsz = hdr->hdr_entries * hdr->hdr_entsz; tblsz = hdr->hdr_entries * hdr->hdr_entsz;
sectors = howmany(tblsz, pp->sectorsize); sectors = howmany(tblsz, pp->sectorsize);
buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO); buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO);
for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) { for (idx = 0; idx < sectors; idx += maxphys / pp->sectorsize) {
size = (sectors - idx > MAXPHYS / pp->sectorsize) ? MAXPHYS: size = (sectors - idx > maxphys / pp->sectorsize) ? maxphys:
(sectors - idx) * pp->sectorsize; (sectors - idx) * pp->sectorsize;
p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize, p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize,
size, &error); size, &error);
if (p == NULL) { if (p == NULL) {
g_free(buf); g_free(buf);
return (NULL); return (NULL);
} }
bcopy(p, buf + idx * pp->sectorsize, size); bcopy(p, buf + idx * pp->sectorsize, size);
▲ Show 20 Lines • Show All 667 Lines • ▼ Show 20 Linesg_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
/* Write primary meta-data. */ /* Write primary meta-data. */
le32enc(buf + 16, 0); /* hdr_crc_self. */ le32enc(buf + 16, 0); /* hdr_crc_self. */
le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */ le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */
le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */ le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */
le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */ le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */
crc = crc32(buf, table->hdr->hdr_size); crc = crc32(buf, table->hdr->hdr_size);
le32enc(buf + 16, crc); le32enc(buf + 16, crc);
for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { for (index = 0; index < tblsz; index += maxphys / pp->sectorsize) {
error = g_write_data(cp, error = g_write_data(cp,
(table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize, (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize,
buf + (index + 1) * pp->sectorsize, buf + (index + 1) * pp->sectorsize,
(tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: (tblsz - index > maxphys / pp->sectorsize) ? maxphys :
(tblsz - index) * pp->sectorsize); (tblsz - index) * pp->sectorsize);
if (error) if (error)
goto out; goto out;
} }
error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize, error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
buf, pp->sectorsize); buf, pp->sectorsize);
if (error) if (error)
goto out; goto out;
/* Write secondary meta-data. */ /* Write secondary meta-data. */
le32enc(buf + 16, 0); /* hdr_crc_self. */ le32enc(buf + 16, 0); /* hdr_crc_self. */
le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */ le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */
le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */ le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */
le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */ le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */
crc = crc32(buf, table->hdr->hdr_size); crc = crc32(buf, table->hdr->hdr_size);
le32enc(buf + 16, crc); le32enc(buf + 16, crc);
for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { for (index = 0; index < tblsz; index += maxphys / pp->sectorsize) {
error = g_write_data(cp, error = g_write_data(cp,
(table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize, (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize,
buf + (index + 1) * pp->sectorsize, buf + (index + 1) * pp->sectorsize,
(tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: (tblsz - index > maxphys / pp->sectorsize) ? maxphys :
(tblsz - index) * pp->sectorsize); (tblsz - index) * pp->sectorsize);
if (error) if (error)
goto out; goto out;
} }
error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize, error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
buf, pp->sectorsize); buf, pp->sectorsize);
out: out:
▲ Show 20 Lines • Show All 167 Lines • Show Last 20 Lines