Update blkid to 2.25.0
Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk.
This should help in later patch updates.
Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262
diff --git a/libblkid/libfdisk/src/dos.c b/libblkid/libfdisk/src/dos.c
new file mode 100644
index 0000000..2a06707
--- /dev/null
+++ b/libblkid/libfdisk/src/dos.c
@@ -0,0 +1,2331 @@
+/*
+ *
+ * Copyright (C) 2007-2013 Karel Zak <kzak@redhat.com>
+ * 2012 Davidlohr Bueso <dave@gnu.org>
+ *
+ * This is re-written version for libfdisk, the original was fdiskdoslabel.c
+ * from util-linux fdisk.
+ */
+#include "c.h"
+#include "nls.h"
+#include "randutils.h"
+#include "pt-mbr.h"
+#include "strutils.h"
+
+#include "fdiskP.h"
+
+#include <ctype.h>
+
+#define MAXIMUM_PARTS 60
+#define ACTIVE_FLAG 0x80
+
+/**
+ * SECTION: dos
+ * @title: DOS (MBR)
+ * @short_description: disk label specific functions
+ *
+ */
+
+
+#define IS_EXTENDED(i) \
+ ((i) == MBR_DOS_EXTENDED_PARTITION \
+ || (i) == MBR_W95_EXTENDED_PARTITION \
+ || (i) == MBR_LINUX_EXTENDED_PARTITION)
+
+/*
+ * per partition table entry data
+ *
+ * The four primary partitions have the same sectorbuffer
+ * and have NULL ex_entry.
+ *
+ * Each logical partition table entry has two pointers, one for the
+ * partition and one link to the next one.
+ */
+struct pte {
+ struct dos_partition *pt_entry; /* on-disk MBR entry */
+ struct dos_partition *ex_entry; /* on-disk EBR entry */
+ fdisk_sector_t offset; /* disk sector number */
+ unsigned char *sectorbuffer; /* disk sector contents */
+
+ unsigned int changed : 1,
+ private_sectorbuffer : 1;
+};
+
+/*
+ * in-memory fdisk GPT stuff
+ */
+struct fdisk_dos_label {
+ struct fdisk_label head; /* generic part */
+
+ struct pte ptes[MAXIMUM_PARTS]; /* partition */
+ fdisk_sector_t ext_offset; /* start of the ext.partition */
+ size_t ext_index; /* ext.partition index (if ext_offset is set) */
+ unsigned int compatible : 1, /* is DOS compatible? */
+ non_pt_changed : 1; /* MBR, but no PT changed */
+};
+
+/*
+ * Partition types
+ */
+static struct fdisk_parttype dos_parttypes[] = {
+ #include "pt-mbr-partnames.h"
+};
+
+#define set_hsc(h,s,c,sector) { \
+ s = sector % cxt->geom.sectors + 1; \
+ sector /= cxt->geom.sectors; \
+ h = sector % cxt->geom.heads; \
+ sector /= cxt->geom.heads; \
+ c = sector & 0xff; \
+ s |= (sector >> 2) & 0xc0; \
+ }
+
+
+#define sector(s) ((s) & 0x3f)
+#define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
+
+#define alignment_required(_x) ((_x)->grain != (_x)->sector_size)
+
+#define is_dos_compatible(_x) \
+ (fdisk_is_label(_x, DOS) && \
+ fdisk_dos_is_compatible(fdisk_get_label(_x, NULL)))
+
+#define cround(c, n) fdisk_cround(c, n)
+
+
+static inline struct fdisk_dos_label *self_label(struct fdisk_context *cxt)
+{
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ return (struct fdisk_dos_label *) cxt->label;
+}
+
+static inline struct pte *self_pte(struct fdisk_context *cxt, size_t i)
+{
+ struct fdisk_dos_label *l = self_label(cxt);
+
+ if (i >= ARRAY_SIZE(l->ptes))
+ return NULL;
+
+ return &l->ptes[i];
+}
+
+static inline struct dos_partition *self_partition(
+ struct fdisk_context *cxt,
+ size_t i)
+{
+ struct pte *pe = self_pte(cxt, i);
+ return pe ? pe->pt_entry : NULL;
+}
+
+struct dos_partition *fdisk_dos_get_partition(
+ struct fdisk_context *cxt,
+ size_t i)
+{
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ return self_partition(cxt, i);
+}
+
+static struct fdisk_parttype *dos_partition_parttype(
+ struct fdisk_context *cxt,
+ struct dos_partition *p)
+{
+ struct fdisk_parttype *t
+ = fdisk_label_get_parttype_from_code(cxt->label, p->sys_ind);
+ return t ? : fdisk_new_unknown_parttype(p->sys_ind, NULL);
+}
+
+/*
+ * Linux kernel cares about partition size only. Things like
+ * partition type or so are completely irrelevant -- kzak Nov-2013
+ */
+static int is_used_partition(struct dos_partition *p)
+{
+ return p && dos_partition_get_size(p) != 0;
+}
+
+static void partition_set_changed(
+ struct fdisk_context *cxt,
+ size_t i,
+ int changed)
+{
+ struct pte *pe = self_pte(cxt, i);
+
+ if (!pe)
+ return;
+
+ DBG(LABEL, ul_debug("DOS: setting %zu partition to %s", i,
+ changed ? "changed" : "unchanged"));
+
+ pe->changed = changed ? 1 : 0;
+ if (changed)
+ fdisk_label_set_changed(cxt->label, 1);
+}
+
+static fdisk_sector_t get_abs_partition_start(struct pte *pe)
+{
+ assert(pe);
+ assert(pe->pt_entry);
+
+ return pe->offset + dos_partition_get_start(pe->pt_entry);
+}
+
+static fdisk_sector_t get_abs_partition_end(struct pte *pe)
+{
+ fdisk_sector_t size;
+
+ assert(pe);
+ assert(pe->pt_entry);
+
+ size = dos_partition_get_size(pe->pt_entry);
+ return get_abs_partition_start(pe) + size - (size ? 1 : 0);
+}
+
+static int is_cleared_partition(struct dos_partition *p)
+{
+ return !(!p || p->boot_ind || p->bh || p->bs || p->bc ||
+ p->sys_ind || p->eh || p->es || p->ec ||
+ dos_partition_get_start(p) || dos_partition_get_size(p));
+}
+
+static int get_partition_unused_primary(struct fdisk_context *cxt,
+ struct fdisk_partition *pa,
+ size_t *partno)
+{
+ size_t org, n;
+ int rc;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(partno);
+
+ org = cxt->label->nparts_max;
+
+ cxt->label->nparts_max = 4;
+ rc = fdisk_partition_next_partno(pa, cxt, &n);
+ cxt->label->nparts_max = org;
+
+ if (rc == 1) {
+ fdisk_info(cxt, _("All primary partitions have been defined already."));
+ rc = -1;
+ } else if (rc == 0)
+ *partno = n;
+ return rc;
+}
+
+static int seek_sector(struct fdisk_context *cxt, fdisk_sector_t secno)
+{
+ off_t offset = (off_t) secno * cxt->sector_size;
+
+ return lseek(cxt->dev_fd, offset, SEEK_SET) == (off_t) -1 ? -errno : 0;
+}
+
+static int read_sector(struct fdisk_context *cxt, fdisk_sector_t secno,
+ unsigned char *buf)
+{
+ int rc = seek_sector(cxt, secno);
+ ssize_t r;
+
+ if (rc < 0)
+ return rc;
+
+ r = read(cxt->dev_fd, buf, cxt->sector_size);
+ if (r == (ssize_t) cxt->sector_size)
+ return 0;
+ if (r < 0)
+ return -errno;
+ return -1;
+}
+
+/* Allocate a buffer and read a partition table sector */
+static int read_pte(struct fdisk_context *cxt, size_t pno, fdisk_sector_t offset)
+{
+ int rc;
+ unsigned char *buf;
+ struct pte *pe = self_pte(cxt, pno);
+
+ buf = calloc(1, cxt->sector_size);
+ if (!buf)
+ return -ENOMEM;
+
+ DBG(LABEL, ul_debug("DOS: reading EBR %zu: offset=%ju, buffer=%p",
+ pno, (uintmax_t) offset, buf));
+
+ pe->offset = offset;
+ pe->sectorbuffer = buf;
+ pe->private_sectorbuffer = 1;
+
+ rc = read_sector(cxt, offset, pe->sectorbuffer);
+ if (rc) {
+ fdisk_warn(cxt, _("Failed to read extended partition table "
+ "(offset=%ju)"), (uintmax_t) offset);
+ return rc;
+ }
+
+ pe->changed = 0;
+ pe->pt_entry = pe->ex_entry = NULL;
+ return 0;
+}
+
+
+static void clear_partition(struct dos_partition *p)
+{
+ if (!p)
+ return;
+ p->boot_ind = 0;
+ p->bh = 0;
+ p->bs = 0;
+ p->bc = 0;
+ p->sys_ind = 0;
+ p->eh = 0;
+ p->es = 0;
+ p->ec = 0;
+ dos_partition_set_start(p,0);
+ dos_partition_set_size(p,0);
+}
+
+static void dos_init(struct fdisk_context *cxt)
+{
+ struct fdisk_dos_label *l = self_label(cxt);
+ size_t i;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ DBG(LABEL, ul_debug("DOS: initialize, first sector buffer %p", cxt->firstsector));
+
+ cxt->label->nparts_max = 4; /* default, unlimited number of logical */
+
+ l->ext_index = 0;
+ l->ext_offset = 0;
+ l->non_pt_changed = 0;
+
+ memset(l->ptes, 0, sizeof(l->ptes));
+
+ for (i = 0; i < 4; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ pe->pt_entry = mbr_get_partition(cxt->firstsector, i);
+ pe->ex_entry = NULL;
+ pe->offset = 0;
+ pe->sectorbuffer = cxt->firstsector;
+ pe->private_sectorbuffer = 0;
+ pe->changed = 0;
+ }
+
+ if (fdisk_is_listonly(cxt))
+ return;
+ /*
+ * Various warnings...
+ */
+ if (fdisk_missing_geometry(cxt))
+ fdisk_warnx(cxt, _("You can set geometry from the extra functions menu."));
+
+ if (is_dos_compatible(cxt)) {
+ fdisk_warnx(cxt, _("DOS-compatible mode is deprecated."));
+
+ if (cxt->sector_size != cxt->phy_sector_size)
+ fdisk_info(cxt, _(
+ "The device presents a logical sector size that is smaller than "
+ "the physical sector size. Aligning to a physical sector (or optimal "
+ "I/O) size boundary is recommended, or performance may be impacted."));
+ }
+
+ if (fdisk_use_cylinders(cxt))
+ fdisk_warnx(cxt, _("Cylinders as display units are deprecated."));
+
+ if (cxt->total_sectors > UINT_MAX) {
+ uint64_t bytes = cxt->total_sectors * cxt->sector_size;
+ char *szstr = size_to_human_string(SIZE_SUFFIX_SPACE
+ | SIZE_SUFFIX_3LETTER, bytes);
+ fdisk_warnx(cxt,
+ _("The size of this disk is %s (%ju bytes). DOS "
+ "partition table format can not be used on drives for "
+ "volumes larger than %lu bytes for %lu-byte "
+ "sectors. Use GUID partition table format (GPT)."),
+ szstr, bytes,
+ UINT_MAX * cxt->sector_size,
+ cxt->sector_size);
+ free(szstr);
+ }
+}
+
+/* callback called by libfdisk */
+static void dos_deinit(struct fdisk_label *lb)
+{
+ size_t i;
+ struct fdisk_dos_label *l = (struct fdisk_dos_label *) lb;
+
+ for (i = 0; i < ARRAY_SIZE(l->ptes); i++) {
+ struct pte *pe = &l->ptes[i];
+
+ if (pe->private_sectorbuffer && pe->sectorbuffer) {
+ DBG(LABEL, ul_debug("DOS: freeing pte %zu sector buffer %p",
+ i, pe->sectorbuffer));
+ free(pe->sectorbuffer);
+ }
+ pe->sectorbuffer = NULL;
+ pe->private_sectorbuffer = 0;
+ }
+
+ memset(l->ptes, 0, sizeof(l->ptes));
+}
+
+static void reset_pte(struct pte *pe)
+{
+ assert(pe);
+
+ if (pe->private_sectorbuffer) {
+ DBG(LABEL, ul_debug(" --> freeing pte sector buffer %p",
+ pe->sectorbuffer));
+ free(pe->sectorbuffer);
+ }
+ memset(pe, 0, sizeof(struct pte));
+}
+
+static int dos_delete_partition(struct fdisk_context *cxt, size_t partnum)
+{
+ struct fdisk_dos_label *l;
+ struct pte *pe;
+ struct dos_partition *p;
+ struct dos_partition *q;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ pe = self_pte(cxt, partnum);
+ if (!pe)
+ return -EINVAL;
+
+ DBG(LABEL, ul_debug("DOS: delete partiton %zu (max=%zu)", partnum,
+ cxt->label->nparts_max));
+
+ l = self_label(cxt);
+ p = pe->pt_entry;
+ q = pe->ex_entry;
+
+ /* Note that for the fifth partition (partnum == 4) we don't actually
+ decrement partitions. */
+ if (partnum < 4) {
+ DBG(LABEL, ul_debug("--> delete primary"));
+ if (IS_EXTENDED(p->sys_ind) && partnum == l->ext_index) {
+ cxt->label->nparts_max = 4;
+ l->ptes[l->ext_index].ex_entry = NULL;
+ l->ext_offset = 0;
+ l->ext_index = 0;
+ }
+ partition_set_changed(cxt, partnum, 1);
+ clear_partition(p);
+ } else if (!q->sys_ind && partnum > 4) {
+ DBG(LABEL, ul_debug("--> delete logical [last in the chain]"));
+ reset_pte(&l->ptes[partnum]);
+ --cxt->label->nparts_max;
+ --partnum;
+ /* clear link to deleted partition */
+ clear_partition(l->ptes[partnum].ex_entry);
+ partition_set_changed(cxt, partnum, 1);
+ } else {
+ DBG(LABEL, ul_debug("--> delete logical [move down]"));
+ if (partnum > 4) {
+ DBG(LABEL, ul_debug(" --> delete %zu logical link", partnum));
+ p = l->ptes[partnum - 1].ex_entry;
+ *p = *q;
+ dos_partition_set_start(p, dos_partition_get_start(q));
+ dos_partition_set_size(p, dos_partition_get_size(q));
+ partition_set_changed(cxt, partnum - 1, 1);
+
+ } else if (cxt->label->nparts_max > 5) {
+ DBG(LABEL, ul_debug(" --> delete first logical link"));
+ pe = &l->ptes[5]; /* second logical */
+
+ if (pe->pt_entry) /* prevent SEGFAULT */
+ dos_partition_set_start(pe->pt_entry,
+ get_abs_partition_start(pe) -
+ l->ext_offset);
+ pe->offset = l->ext_offset;
+ partition_set_changed(cxt, 5, 1);
+ }
+
+ if (cxt->label->nparts_max > 5) {
+ DBG(LABEL, ul_debug(" --> move ptes"));
+ cxt->label->nparts_max--;
+ reset_pte(&l->ptes[partnum]);
+ while (partnum < cxt->label->nparts_max) {
+ DBG(LABEL, ul_debug(" --> moving pte %zu <-- %zu", partnum, partnum + 1));
+ l->ptes[partnum] = l->ptes[partnum + 1];
+ partnum++;
+ }
+ memset(&l->ptes[partnum], 0, sizeof(struct pte));
+ } else {
+ DBG(LABEL, ul_debug(" --> the only logical: clear only"));
+ clear_partition(l->ptes[partnum].pt_entry);
+ cxt->label->nparts_max--;
+
+ if (partnum == 4) {
+ DBG(LABEL, ul_debug(" --> clear last logical"));
+ reset_pte(&l->ptes[partnum]);
+ partition_set_changed(cxt, l->ext_index, 1);
+ }
+ }
+ }
+
+ fdisk_label_set_changed(cxt->label, 1);
+ return 0;
+}
+
+static void read_extended(struct fdisk_context *cxt, size_t ext)
+{
+ size_t i;
+ struct pte *pex, *pe;
+ struct dos_partition *p, *q;
+ struct fdisk_dos_label *l = self_label(cxt);
+
+ l->ext_index = ext;
+ pex = self_pte(cxt, ext);
+ pex->ex_entry = pex->pt_entry;
+
+ p = pex->pt_entry;
+ if (!dos_partition_get_start(p)) {
+ fdisk_warnx(cxt, _("Bad offset in primary extended partition."));
+ return;
+ }
+
+ DBG(LABEL, ul_debug("DOS: Reading extended %zu", ext));
+
+ while (IS_EXTENDED (p->sys_ind)) {
+ pe = self_pte(cxt, cxt->label->nparts_max);
+
+ if (cxt->label->nparts_max >= MAXIMUM_PARTS) {
+ /* This is not a Linux restriction, but
+ this program uses arrays of size MAXIMUM_PARTS.
+ Do not try to `improve' this test. */
+ struct pte *pre = self_pte(cxt,
+ cxt->label->nparts_max - 1);
+ fdisk_warnx(cxt,
+ _("Omitting partitions after #%zu. They will be deleted "
+ "if you save this partition table."),
+ cxt->label->nparts_max);
+
+ clear_partition(pre->ex_entry);
+ partition_set_changed(cxt,
+ cxt->label->nparts_max - 1, 1);
+ return;
+ }
+
+ if (read_pte(cxt, cxt->label->nparts_max, l->ext_offset +
+ dos_partition_get_start(p)))
+ return;
+
+ if (!l->ext_offset)
+ l->ext_offset = dos_partition_get_start(p);
+
+ assert(pe->sectorbuffer);
+ q = p = mbr_get_partition(pe->sectorbuffer, 0);
+
+ for (i = 0; i < 4; i++, p++) {
+ if (!dos_partition_get_size(p))
+ continue;
+
+ if (IS_EXTENDED (p->sys_ind)) {
+ if (pe->ex_entry)
+ fdisk_warnx(cxt, _(
+ "Extra link pointer in partition "
+ "table %zu."),
+ cxt->label->nparts_max + 1);
+ else
+ pe->ex_entry = p;
+ } else if (p->sys_ind) {
+ if (pe->pt_entry)
+ fdisk_warnx(cxt, _(
+ "Ignoring extra data in partition "
+ "table %zu."),
+ cxt->label->nparts_max + 1);
+ else
+ pe->pt_entry = p;
+ }
+ }
+
+ /* very strange code here... */
+ if (!pe->pt_entry) {
+ if (q != pe->ex_entry)
+ pe->pt_entry = q;
+ else
+ pe->pt_entry = q + 1;
+ }
+ if (!pe->ex_entry) {
+ if (q != pe->pt_entry)
+ pe->ex_entry = q;
+ else
+ pe->ex_entry = q + 1;
+ }
+
+ p = pe->ex_entry;
+ cxt->label->nparts_cur = ++cxt->label->nparts_max;
+
+ DBG(LABEL, ul_debug("DOS: EBR[offset=%ju]: link: type=%x, start=%u, size=%u; "
+ " data: type=%x, start=%u, size=%u",
+ (uintmax_t) pe->offset,
+ pe->ex_entry->sys_ind,
+ dos_partition_get_start(pe->ex_entry),
+ dos_partition_get_size(pe->ex_entry),
+ pe->pt_entry->sys_ind,
+ dos_partition_get_start(pe->pt_entry),
+ dos_partition_get_size(pe->pt_entry)));
+
+ }
+
+ /* remove last empty EBR */
+ pe = self_pte(cxt, cxt->label->nparts_max - 1);
+ if (is_cleared_partition(pe->ex_entry) &&
+ is_cleared_partition(pe->pt_entry)) {
+ DBG(LABEL, ul_debug("DOS: EBR[offset=%ju]: empty, remove", (uintmax_t) pe->offset));
+ reset_pte(pe);
+ cxt->label->nparts_max--;
+ cxt->label->nparts_cur--;
+ }
+
+ /* remove empty links */
+ remove:
+ q = self_partition(cxt, 4);
+ for (i = 4; i < cxt->label->nparts_max; i++) {
+ p = self_partition(cxt, i);
+
+ if (!dos_partition_get_size(p) &&
+ (cxt->label->nparts_max > 5 || q->sys_ind)) {
+ fdisk_info(cxt, _("omitting empty partition (%zu)"), i+1);
+ dos_delete_partition(cxt, i);
+ goto remove; /* numbering changed */
+ }
+ }
+
+ DBG(LABEL, ul_debug("DOS: nparts_max: %zu", cxt->label->nparts_max));
+}
+
+static int dos_get_disklabel_id(struct fdisk_context *cxt, char **id)
+{
+ unsigned int num;
+
+ assert(cxt);
+ assert(id);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ num = mbr_get_id(cxt->firstsector);
+ if (asprintf(id, "0x%08x", num) > 0)
+ return 0;
+
+ return -ENOMEM;
+}
+
+static int dos_create_disklabel(struct fdisk_context *cxt)
+{
+ unsigned int id = 0;
+ int rc, has_id = 0;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ DBG(LABEL, ul_debug("DOS: creating new disklabel"));
+
+ if (cxt->script) {
+ char *end = NULL;
+ const char *s = fdisk_script_get_header(cxt->script, "label-id");
+
+ if (s) {
+ errno = 0;
+ id = strtol(s, &end, 16);
+ if (!errno && end && s < end)
+ has_id = 1;
+ }
+ }
+
+ /* random disk signature */
+ if (!has_id)
+ random_get_bytes(&id, sizeof(id));
+
+ dos_init(cxt);
+ rc = fdisk_init_firstsector_buffer(cxt);
+ if (rc)
+ return rc;
+ fdisk_label_set_changed(cxt->label, 1);
+
+ /* Generate an MBR ID for this disk */
+ mbr_set_id(cxt->firstsector, id);
+
+ /* Put MBR signature */
+ mbr_set_magic(cxt->firstsector);
+
+ fdisk_info(cxt, _("Created a new DOS disklabel with disk "
+ "identifier 0x%08x."), id);
+ return 0;
+}
+
+static int dos_set_disklabel_id(struct fdisk_context *cxt)
+{
+ char *end = NULL, *str = NULL;
+ unsigned int id, old;
+ struct fdisk_dos_label *l;
+ int rc;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ DBG(LABEL, ul_debug("DOS: setting Id"));
+
+ l = self_label(cxt);
+ old = mbr_get_id(cxt->firstsector);
+ rc = fdisk_ask_string(cxt,
+ _("Enter the new disk identifier"), &str);
+ if (rc)
+ return rc;
+
+ errno = 0;
+ id = strtoul(str, &end, 0);
+ if (errno || str == end || (end && *end)) {
+ fdisk_warnx(cxt, _("Incorrect value."));
+ return -EINVAL;
+ }
+
+
+ mbr_set_id(cxt->firstsector, id);
+ l->non_pt_changed = 1;
+ fdisk_label_set_changed(cxt->label, 1);
+
+ fdisk_info(cxt, _("Disk identifier changed from 0x%08x to 0x%08x."),
+ old, id);
+ return 0;
+}
+
+static void get_partition_table_geometry(struct fdisk_context *cxt,
+ unsigned int *ph, unsigned int *ps)
+{
+ unsigned char *bufp = cxt->firstsector;
+ struct dos_partition *p;
+ int i, h, s, hh, ss;
+ int first = 1;
+ int bad = 0;
+
+ hh = ss = 0;
+ for (i = 0; i < 4; i++) {
+ p = mbr_get_partition(bufp, i);
+ if (p->sys_ind != 0) {
+ h = p->eh + 1;
+ s = (p->es & 077);
+ if (first) {
+ hh = h;
+ ss = s;
+ first = 0;
+ } else if (hh != h || ss != s)
+ bad = 1;
+ }
+ }
+
+ if (!first && !bad) {
+ *ph = hh;
+ *ps = ss;
+ }
+
+ DBG(LABEL, ul_debug("DOS PT geometry: heads=%u, sectors=%u", *ph, *ps));
+}
+
+static int dos_reset_alignment(struct fdisk_context *cxt)
+{
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ /* overwrite necessary stuff by DOS deprecated stuff */
+ if (is_dos_compatible(cxt)) {
+ DBG(LABEL, ul_debug("DOS: reseting alignemnt for DOS-comaptiblem PT"));
+ if (cxt->geom.sectors)
+ cxt->first_lba = cxt->geom.sectors; /* usually 63 */
+
+ cxt->grain = cxt->sector_size; /* usually 512 */
+ }
+
+ return 0;
+}
+
+/* TODO: move to include/pt-dos.h and share with libblkid */
+#define AIX_MAGIC_STRING "\xC9\xC2\xD4\xC1"
+#define AIX_MAGIC_STRLEN (sizeof(AIX_MAGIC_STRING) - 1)
+
+static int dos_probe_label(struct fdisk_context *cxt)
+{
+ size_t i;
+ unsigned int h = 0, s = 0;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ /* ignore disks with AIX magic number */
+ if (memcmp(cxt->firstsector, AIX_MAGIC_STRING, AIX_MAGIC_STRLEN) == 0)
+ return 0;
+
+ if (!mbr_is_valid_magic(cxt->firstsector))
+ return 0;
+
+ dos_init(cxt);
+
+ get_partition_table_geometry(cxt, &h, &s);
+ if (h && s) {
+ cxt->geom.heads = h;
+ cxt->geom.sectors = s;
+ }
+
+ for (i = 0; i < 4; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ if (is_used_partition(pe->pt_entry))
+ cxt->label->nparts_cur++;
+
+ if (IS_EXTENDED (pe->pt_entry->sys_ind)) {
+ if (cxt->label->nparts_max != 4)
+ fdisk_warnx(cxt, _(
+ "Ignoring extra extended partition %zu"),
+ i + 1);
+ else
+ read_extended(cxt, i);
+ }
+ }
+
+ for (i = 3; i < cxt->label->nparts_max; i++) {
+ struct pte *pe = self_pte(cxt, i);
+ struct fdisk_dos_label *l = self_label(cxt);
+
+ if (!mbr_is_valid_magic(pe->sectorbuffer)) {
+ fdisk_info(cxt, _(
+ "Invalid flag 0x%02x%02x of EBR (for partition %zu) will "
+ "be corrected by w(rite)."),
+ pe->sectorbuffer[510],
+ pe->sectorbuffer[511],
+ i + 1);
+ partition_set_changed(cxt, i, 1);
+
+ /* mark also extended as changed to update the first EBR
+ * in situation that there is no logical partitions at all */
+ partition_set_changed(cxt, l->ext_index, 1);
+ }
+ }
+
+ return 1;
+}
+
+static void set_partition(struct fdisk_context *cxt,
+ int i, int doext, fdisk_sector_t start,
+ fdisk_sector_t stop, int sysid, int boot)
+{
+ struct pte *pe = self_pte(cxt, i);
+ struct dos_partition *p;
+ fdisk_sector_t offset;
+
+ assert(!FDISK_IS_UNDEF(start));
+ assert(!FDISK_IS_UNDEF(stop));
+
+ if (doext) {
+ struct fdisk_dos_label *l = self_label(cxt);
+ p = pe->ex_entry;
+ offset = l->ext_offset;
+ } else {
+ p = pe->pt_entry;
+ offset = pe->offset;
+ }
+
+ DBG(LABEL, ul_debug("DOS: setting partition %d%s, offset=%zu, start=%zu, stop=%zu, sysid=%02x",
+ i, doext ? " [extended]" : "",
+ (size_t) offset,
+ (size_t) (start - offset),
+ (size_t) (stop - start + 1),
+ sysid));
+
+ p->boot_ind = boot ? ACTIVE_FLAG : 0;
+ p->sys_ind = sysid;
+ dos_partition_set_start(p, start - offset);
+ dos_partition_set_size(p, stop - start + 1);
+
+ if (is_dos_compatible(cxt) && (start/(cxt->geom.sectors*cxt->geom.heads) > 1023))
+ start = cxt->geom.heads*cxt->geom.sectors*1024 - 1;
+ set_hsc(p->bh, p->bs, p->bc, start);
+ if (is_dos_compatible(cxt) && (stop/(cxt->geom.sectors*cxt->geom.heads) > 1023))
+ stop = cxt->geom.heads*cxt->geom.sectors*1024 - 1;
+ set_hsc(p->eh, p->es, p->ec, stop);
+ partition_set_changed(cxt, i, 1);
+}
+
+static fdisk_sector_t get_unused_start(struct fdisk_context *cxt,
+ int part_n, fdisk_sector_t start,
+ fdisk_sector_t first[], fdisk_sector_t last[])
+{
+ size_t i;
+
+ for (i = 0; i < cxt->label->nparts_max; i++) {
+ fdisk_sector_t lastplusoff;
+ struct pte *pe = self_pte(cxt, i);
+
+ if (start == pe->offset)
+ start += cxt->first_lba;
+ lastplusoff = last[i] + ((part_n < 4) ? 0 : cxt->first_lba);
+ if (start >= first[i] && start <= lastplusoff)
+ start = lastplusoff + 1;
+ }
+
+ return start;
+}
+
+static void fill_bounds(struct fdisk_context *cxt,
+ fdisk_sector_t *first, fdisk_sector_t *last)
+{
+ size_t i;
+ struct pte *pe = self_pte(cxt, 0);
+ struct dos_partition *p;
+
+ for (i = 0; i < cxt->label->nparts_max; pe++,i++) {
+ p = pe->pt_entry;
+ if (is_cleared_partition(p) || IS_EXTENDED (p->sys_ind)) {
+ first[i] = 0xffffffff;
+ last[i] = 0;
+ } else {
+ first[i] = get_abs_partition_start(pe);
+ last[i] = get_abs_partition_end(pe);
+ }
+ }
+}
+
+static int get_start_from_user( struct fdisk_context *cxt,
+ fdisk_sector_t *start,
+ fdisk_sector_t low,
+ fdisk_sector_t dflt,
+ fdisk_sector_t limit,
+ struct fdisk_partition *pa)
+{
+ assert(start);
+
+ /* try to use tepmlate from 'pa' */
+ if (pa && pa->start_follow_default)
+ *start = dflt;
+
+ else if (pa && fdisk_partition_has_start(pa)) {
+ DBG(LABEL, ul_debug("DOS: start: wanted=%ju, low=%ju, limit=%ju",
+ (uintmax_t) pa->start, (uintmax_t) low, (uintmax_t) limit));
+ *start = pa->start;
+ if (*start < low || *start > limit) {
+ fdisk_warnx(cxt, _("Start sector %ju out of range."),
+ (uintmax_t) *start);
+ return -ERANGE;
+ }
+ } else {
+ /* ask user by dialog */
+ struct fdisk_ask *ask = fdisk_new_ask();
+ int rc;
+
+ if (!ask)
+ return -ENOMEM;
+ fdisk_ask_set_query(ask,
+ fdisk_use_cylinders(cxt) ?
+ _("First cylinder") : _("First sector"));
+ fdisk_ask_set_type(ask, FDISK_ASKTYPE_NUMBER);
+ fdisk_ask_number_set_low(ask, fdisk_cround(cxt, low));
+ fdisk_ask_number_set_default(ask, fdisk_cround(cxt, dflt));
+ fdisk_ask_number_set_high(ask, fdisk_cround(cxt, limit));
+
+ rc = fdisk_do_ask(cxt, ask);
+ *start = fdisk_ask_number_get_result(ask);
+ fdisk_unref_ask(ask);
+ if (rc)
+ return rc;
+ if (fdisk_use_cylinders(cxt)) {
+ *start = (*start - 1)
+ * fdisk_get_units_per_sector(cxt);
+ if (*start < low)
+ *start = low;
+ }
+ }
+
+ DBG(LABEL, ul_debug("DOS: start is %ju", (uintmax_t) *start));
+ return 0;
+}
+
+static fdisk_sector_t get_possible_last(struct fdisk_context *cxt, size_t n)
+{
+ fdisk_sector_t limit;
+
+ if (n >= 4) {
+ /* logical partitions */
+ struct fdisk_dos_label *l = self_label(cxt);
+ struct pte *ext_pe = l->ext_offset ? self_pte(cxt, l->ext_index) : NULL;
+
+ if (!ext_pe)
+ return 0;
+ limit = get_abs_partition_end(ext_pe);
+ } else {
+ /* primary partitions */
+ if (fdisk_use_cylinders(cxt) || !cxt->total_sectors)
+ limit = cxt->geom.heads * cxt->geom.sectors * cxt->geom.cylinders - 1;
+ else
+ limit = cxt->total_sectors - 1;
+
+ if (limit > UINT_MAX)
+ limit = UINT_MAX;
+ }
+
+ DBG(LABEL, ul_debug("DOS: last possible sector for #%zu is %ju",
+ n, (uintmax_t) limit));
+ return limit;
+}
+
+/* returns last free sector for area addressed by @start, the first[] and
+ * last[] are fill_bounds() results */
+static fdisk_sector_t get_unused_last(struct fdisk_context *cxt, size_t n,
+ fdisk_sector_t start,
+ fdisk_sector_t first[], fdisk_sector_t last[])
+{
+ size_t i;
+ fdisk_sector_t limit = get_possible_last(cxt, n);
+
+ for (i = 0; i < cxt->label->nparts_max; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ if (start < pe->offset && limit >= pe->offset)
+ limit = pe->offset - 1;
+ if (start < first[i] && limit >= first[i])
+ limit = first[i] - 1;
+ }
+
+ DBG(LABEL, ul_debug("DOS: unused sector for #%zu is %ju",
+ n, (uintmax_t) limit));
+ return limit;
+}
+
+static int add_partition(struct fdisk_context *cxt, size_t n,
+ struct fdisk_partition *pa)
+{
+ int sys, read = 0, rc, isrel = 0;
+ size_t i;
+ struct fdisk_dos_label *l = self_label(cxt);
+ struct dos_partition *p = self_partition(cxt, n);
+ struct pte *ext_pe = l->ext_offset ? self_pte(cxt, l->ext_index) : NULL;
+
+ fdisk_sector_t start, stop = 0, limit, temp,
+ first[cxt->label->nparts_max],
+ last[cxt->label->nparts_max];
+
+ DBG(LABEL, ul_debug("DOS: adding partition %zu", n));
+
+ sys = pa && pa->type ? pa->type->code : MBR_LINUX_DATA_PARTITION;
+
+ if (is_used_partition(p)) {
+ fdisk_warnx(cxt, _("Partition %zu is already defined. "
+ "Delete it before re-adding it."),
+ n + 1);
+ return -EINVAL;
+ }
+ fill_bounds(cxt, first, last);
+ limit = get_possible_last(cxt, n);
+
+ if (n < 4) {
+ if (cxt->parent && fdisk_is_label(cxt->parent, GPT))
+ start = 1; /* Bad boy modifies hybrid MBR */
+ else {
+ if (cxt->script && pa && fdisk_partition_has_start(pa)
+ && pa->start < cxt->first_lba
+ && pa->start >= 1)
+ fdisk_set_first_lba(cxt, 1);
+
+ start = cxt->first_lba;
+ }
+
+ if (l->ext_offset) {
+ assert(ext_pe);
+ first[l->ext_index] = l->ext_offset;
+ last[l->ext_index] = get_abs_partition_end(ext_pe);
+ }
+ } else {
+ assert(ext_pe);
+
+ if (cxt->script && pa && fdisk_partition_has_start(pa)
+ && pa->start >= l->ext_offset
+ && pa->start < l->ext_offset + cxt->first_lba)
+ fdisk_set_first_lba(cxt, 1);
+
+ start = l->ext_offset + cxt->first_lba;
+ }
+
+ if (fdisk_use_cylinders(cxt))
+ for (i = 0; i < cxt->label->nparts_max; i++) {
+ first[i] = (fdisk_cround(cxt, first[i]) - 1)
+ * fdisk_get_units_per_sector(cxt);
+ }
+
+ /*
+ * Ask for first sector
+ */
+ do {
+ fdisk_sector_t dflt, aligned;
+
+ temp = start;
+ dflt = start = get_unused_start(cxt, n, start, first, last);
+
+ if (n >= 4 && pa && fdisk_partition_has_start(pa) && cxt->script
+ && cxt->first_lba > 1
+ && temp == start - cxt->first_lba) {
+ fdisk_set_first_lba(cxt, 1);
+ start = pa->start;
+ }
+
+ /* the default sector should be aligned and unused */
+ do {
+ aligned = fdisk_align_lba_in_range(cxt, dflt, dflt, limit);
+ dflt = get_unused_start(cxt, n, aligned, first, last);
+ } while (dflt != aligned && dflt > aligned && dflt < limit);
+
+ if (dflt >= limit)
+ dflt = start;
+ if (start > limit)
+ break;
+ if (start >= temp + fdisk_get_units_per_sector(cxt)
+ && read) {
+ fdisk_info(cxt, _("Sector %llu is already allocated."),
+ temp);
+ temp = start;
+ read = 0;
+ if (pa && (fdisk_partition_has_start(pa) ||
+ pa->start_follow_default))
+ break;
+ }
+
+ if (!read && start == temp) {
+ rc = get_start_from_user(cxt, &start, temp, dflt, limit, pa);
+ if (rc)
+ return rc;
+ read = 1;
+ }
+ } while (start != temp || !read);
+
+ if (n == 4) {
+ /* The first EBR is stored at begin of the extended partition */
+ struct pte *pe = self_pte(cxt, n);
+ pe->offset = l->ext_offset;
+
+ } else if (n > 4) {
+ /* The second (and another) EBR */
+ struct pte *pe = self_pte(cxt, n);
+
+ pe->offset = start - cxt->first_lba;
+ if (pe->offset == l->ext_offset) { /* must be corrected */
+ pe->offset++;
+ if (cxt->first_lba == 1)
+ start++;
+ }
+ }
+
+ limit = get_unused_last(cxt, n, start, first, last);
+
+ if (start > limit) {
+ fdisk_info(cxt, _("No free sectors available."));
+ if (n > 4)
+ cxt->label->nparts_max--;
+ return -ENOSPC;
+ }
+
+ /*
+ * Ask for last sector
+ */
+ if (fdisk_cround(cxt, start) == fdisk_cround(cxt, limit))
+ stop = limit;
+ else if (pa && pa->end_follow_default)
+ stop = limit;
+ else if (pa && fdisk_partition_has_size(pa)) {
+ stop = start + pa->size - 1;
+ isrel = pa->size_explicit ? 0 : 1;
+ } else {
+ /* ask user by dialog */
+ struct fdisk_ask *ask = fdisk_new_ask();
+
+ if (!ask)
+ return -ENOMEM;
+ fdisk_ask_set_type(ask, FDISK_ASKTYPE_OFFSET);
+
+ if (fdisk_use_cylinders(cxt)) {
+ fdisk_ask_set_query(ask, _("Last cylinder, +cylinders or +size{K,M,G,T,P}"));
+ fdisk_ask_number_set_unit(ask,
+ cxt->sector_size *
+ fdisk_get_units_per_sector(cxt));
+ } else {
+ fdisk_ask_set_query(ask, _("Last sector, +sectors or +size{K,M,G,T,P}"));
+ fdisk_ask_number_set_unit(ask,cxt->sector_size);
+ }
+
+ fdisk_ask_number_set_low(ask, fdisk_cround(cxt, start));
+ fdisk_ask_number_set_default(ask, fdisk_cround(cxt, limit));
+ fdisk_ask_number_set_high(ask, fdisk_cround(cxt, limit));
+ fdisk_ask_number_set_base(ask, fdisk_cround(cxt, start)); /* base for relative input */
+
+ rc = fdisk_do_ask(cxt, ask);
+ stop = fdisk_ask_number_get_result(ask);
+ isrel = fdisk_ask_number_is_relative(ask);
+ fdisk_unref_ask(ask);
+ if (rc)
+ return rc;
+ if (fdisk_use_cylinders(cxt)) {
+ stop = stop * fdisk_get_units_per_sector(cxt) - 1;
+ if (stop >limit)
+ stop = limit;
+ }
+ }
+
+ DBG(LABEL, ul_debug("DOS: raw stop: %ju", (uintmax_t) stop));
+
+ if (stop > limit)
+ stop = limit;
+
+ if (stop < limit) {
+ if (isrel && alignment_required(cxt)) {
+ /* the last sector has not been exactly requested (but
+ * defined by +size{K,M,G} convention), so be smart and
+ * align the end of the partition. The next partition
+ * will start at phy.block boundary.
+ */
+ stop = fdisk_align_lba_in_range(cxt, stop, start, limit) - 1;
+ if (stop > limit)
+ stop = limit;
+ }
+ }
+
+ set_partition(cxt, n, 0, start, stop, sys, pa && pa->boot == 1 ? 1 : 0);
+ if (n > 4) {
+ struct pte *pe = self_pte(cxt, n);
+ set_partition(cxt, n - 1, 1, pe->offset, stop,
+ MBR_DOS_EXTENDED_PARTITION, 0);
+ }
+
+ /* report */
+ {
+ struct fdisk_parttype *t =
+ fdisk_label_get_parttype_from_code(cxt->label, sys);
+ fdisk_info_new_partition(cxt, n + 1, start, stop, t);
+ fdisk_unref_parttype(t);
+ }
+
+
+ if (IS_EXTENDED(sys)) {
+ struct pte *pen = self_pte(cxt, n);
+
+ l->ext_index = n;
+ l->ext_offset = start;
+ pen->ex_entry = p;
+ }
+
+ fdisk_label_set_changed(cxt->label, 1);
+ return 0;
+}
+
+static int add_logical(struct fdisk_context *cxt,
+ struct fdisk_partition *pa,
+ size_t *partno)
+{
+ struct pte *pe;
+ int rc;
+
+ assert(cxt);
+ assert(partno);
+ assert(cxt->label);
+ assert(self_label(cxt)->ext_offset);
+
+ DBG(LABEL, ul_debug("DOS: nparts max: %zu", cxt->label->nparts_max));
+ pe = self_pte(cxt, cxt->label->nparts_max);
+
+ if (!pe->sectorbuffer) {
+ pe->sectorbuffer = calloc(1, cxt->sector_size);
+ if (!pe->sectorbuffer)
+ return -ENOMEM;
+ DBG(LABEL, ul_debug("DOS: logical: %zu: new EBR sector buffer %p",
+ cxt->label->nparts_max, pe->sectorbuffer));
+ pe->private_sectorbuffer = 1;
+ }
+ pe->pt_entry = mbr_get_partition(pe->sectorbuffer, 0);
+ pe->ex_entry = pe->pt_entry + 1;
+ pe->offset = 0;
+ partition_set_changed(cxt, cxt->label->nparts_max, 1);
+
+ cxt->label->nparts_max++;
+
+ /* this message makes sense only when we use extended/primary/logical
+ * dialog. The dialog is disable for scripts, see dos_add_partition() */
+ if (!cxt->script)
+ fdisk_info(cxt, _("Adding logical partition %zu"),
+ cxt->label->nparts_max);
+ *partno = cxt->label->nparts_max - 1;
+ rc = add_partition(cxt, *partno, pa);
+
+ if (rc) {
+ /* reset on error */
+ cxt->label->nparts_max--;
+ pe->pt_entry = NULL;
+ pe->ex_entry = NULL;
+ pe->offset = 0;
+ pe->changed = 0;
+ }
+
+ return rc;
+}
+
+static void check(struct fdisk_context *cxt, size_t n,
+ unsigned int h, unsigned int s, unsigned int c,
+ unsigned int start)
+{
+ unsigned int total, real_s, real_c;
+
+ if (!is_dos_compatible(cxt))
+ return;
+
+ real_s = sector(s) - 1;
+ real_c = cylinder(s, c);
+ total = (real_c * cxt->geom.heads + h) * cxt->geom.sectors + real_s;
+
+ if (!total)
+ fdisk_warnx(cxt, _("Partition %zu: contains sector 0"), n);
+ if (h >= cxt->geom.heads)
+ fdisk_warnx(cxt, _("Partition %zu: head %d greater than "
+ "maximum %d"), n, h + 1, cxt->geom.heads);
+ if (real_s >= cxt->geom.sectors)
+ fdisk_warnx(cxt, _("Partition %zu: sector %d greater than "
+ "maximum %llu"), n, s, cxt->geom.sectors);
+ if (real_c >= cxt->geom.cylinders)
+ fdisk_warnx(cxt, _("Partition %zu: cylinder %d greater than "
+ "maximum %llu"),
+ n, real_c + 1,
+ cxt->geom.cylinders);
+
+ if (cxt->geom.cylinders <= 1024 && start != total)
+ fdisk_warnx(cxt, _("Partition %zu: previous sectors %u "
+ "disagrees with total %u"), n, start, total);
+}
+
+/* check_consistency() and long2chs() added Sat Mar 6 12:28:16 1993,
+ * faith@cs.unc.edu, based on code fragments from pfdisk by Gordon W. Ross,
+ * Jan. 1990 (version 1.2.1 by Gordon W. Ross Aug. 1990; Modified by S.
+ * Lubkin Oct. 1991). */
+
+static void
+long2chs(struct fdisk_context *cxt, unsigned long ls,
+ unsigned int *c, unsigned int *h, unsigned int *s) {
+ int spc = cxt->geom.heads * cxt->geom.sectors;
+
+ *c = ls / spc;
+ ls = ls % spc;
+ *h = ls / cxt->geom.sectors;
+ *s = ls % cxt->geom.sectors + 1; /* sectors count from 1 */
+}
+
+static void check_consistency(struct fdisk_context *cxt, struct dos_partition *p,
+ size_t partition)
+{
+ unsigned int pbc, pbh, pbs; /* physical beginning c, h, s */
+ unsigned int pec, peh, pes; /* physical ending c, h, s */
+ unsigned int lbc, lbh, lbs; /* logical beginning c, h, s */
+ unsigned int lec, leh, les; /* logical ending c, h, s */
+
+ if (!is_dos_compatible(cxt))
+ return;
+
+ if (!cxt->geom.heads || !cxt->geom.sectors || (partition >= 4))
+ return; /* do not check extended partitions */
+
+ /* physical beginning c, h, s */
+ pbc = (p->bc & 0xff) | ((p->bs << 2) & 0x300);
+ pbh = p->bh;
+ pbs = p->bs & 0x3f;
+
+ /* physical ending c, h, s */
+ pec = (p->ec & 0xff) | ((p->es << 2) & 0x300);
+ peh = p->eh;
+ pes = p->es & 0x3f;
+
+ /* compute logical beginning (c, h, s) */
+ long2chs(cxt, dos_partition_get_start(p), &lbc, &lbh, &lbs);
+
+ /* compute logical ending (c, h, s) */
+ long2chs(cxt, dos_partition_get_start(p) + dos_partition_get_size(p) - 1, &lec, &leh, &les);
+
+ /* Same physical / logical beginning? */
+ if (cxt->geom.cylinders <= 1024
+ && (pbc != lbc || pbh != lbh || pbs != lbs)) {
+ fdisk_warnx(cxt, _("Partition %zu: different physical/logical "
+ "beginnings (non-Linux?): "
+ "phys=(%d, %d, %d), logical=(%d, %d, %d)"),
+ partition + 1,
+ pbc, pbh, pbs,
+ lbc, lbh, lbs);
+ }
+
+ /* Same physical / logical ending? */
+ if (cxt->geom.cylinders <= 1024
+ && (pec != lec || peh != leh || pes != les)) {
+ fdisk_warnx(cxt, _("Partition %zu: different physical/logical "
+ "endings: phys=(%d, %d, %d), logical=(%d, %d, %d)"),
+ partition + 1,
+ pec, peh, pes,
+ lec, leh, les);
+ }
+
+ /* Ending on cylinder boundary? */
+ if (peh != (cxt->geom.heads - 1) || pes != cxt->geom.sectors) {
+ fdisk_warnx(cxt, _("Partition %zu: does not end on "
+ "cylinder boundary."),
+ partition + 1);
+ }
+}
+
+static int dos_verify_disklabel(struct fdisk_context *cxt)
+{
+ size_t i, j;
+ fdisk_sector_t total = 1, n_sectors = cxt->total_sectors;
+ fdisk_sector_t first[cxt->label->nparts_max],
+ last[cxt->label->nparts_max];
+ struct dos_partition *p;
+ struct fdisk_dos_label *l = self_label(cxt);
+
+ assert(fdisk_is_label(cxt, DOS));
+
+ fill_bounds(cxt, first, last);
+ for (i = 0; i < cxt->label->nparts_max; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ p = self_partition(cxt, i);
+ if (is_used_partition(p) && !IS_EXTENDED(p->sys_ind)) {
+ check_consistency(cxt, p, i);
+ if (get_abs_partition_start(pe) < first[i])
+ fdisk_warnx(cxt, _(
+ "Partition %zu: bad start-of-data."),
+ i + 1);
+
+ check(cxt, i + 1, p->eh, p->es, p->ec, last[i]);
+ total += last[i] + 1 - first[i];
+
+ if (i == 0)
+ total += get_abs_partition_start(pe) - 1;
+
+ for (j = 0; j < i; j++) {
+ if ((first[i] >= first[j] && first[i] <= last[j])
+ || ((last[i] <= last[j] && last[i] >= first[j]))) {
+
+ fdisk_warnx(cxt, _("Partition %zu: "
+ "overlaps partition %zu."),
+ j + 1, i + 1);
+
+ total += first[i] >= first[j] ?
+ first[i] : first[j];
+ total -= last[i] <= last[j] ?
+ last[i] : last[j];
+ }
+ }
+ }
+ }
+
+ if (l->ext_offset) {
+ fdisk_sector_t e_last;
+ struct pte *ext_pe = self_pte(cxt, l->ext_index);
+
+ e_last = get_abs_partition_end(ext_pe);
+
+ for (i = 4; i < cxt->label->nparts_max; i++) {
+ total++;
+ p = self_partition(cxt, i);
+
+ if (!p->sys_ind) {
+ if (i != 4 || i + 1 < cxt->label->nparts_max)
+ fdisk_warnx(cxt,
+ _("Partition %zu: empty."),
+ i + 1);
+ } else if (first[i] < l->ext_offset
+ || last[i] > e_last) {
+
+ fdisk_warnx(cxt, _("Logical partition %zu: "
+ "not entirely in partition %zu."),
+ i + 1, l->ext_index + 1);
+ }
+ }
+ }
+
+ if (total > n_sectors)
+ fdisk_warnx(cxt, _("Total allocated sectors %llu greater "
+ "than the maximum %llu."), total, n_sectors);
+ else if (total < n_sectors)
+ fdisk_warnx(cxt, _("Remaining %lld unallocated %ld-byte "
+ "sectors."), n_sectors - total, cxt->sector_size);
+
+ return 0;
+}
+
+/*
+ * Ask the user for new partition type information (logical, extended).
+ * This function calls the actual partition adding logic - add_partition.
+ *
+ * API callback.
+ */
+static int dos_add_partition(struct fdisk_context *cxt,
+ struct fdisk_partition *pa,
+ size_t *partno)
+{
+ size_t i, free_primary = 0, free_sectors = 0;
+ fdisk_sector_t last = 0, grain;
+ int rc = 0;
+ struct fdisk_dos_label *l;
+ struct pte *ext_pe;
+ size_t res; /* partno */
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ DBG(LABEL, ul_debug("DOS: new partition wanted"));
+
+ l = self_label(cxt);
+ ext_pe = l->ext_offset ? self_pte(cxt, l->ext_index) : NULL;
+
+ /*
+ * partition template (@pa) based partitioning
+ */
+
+ /* pa specifies start within extended partition, add logical */
+ if (pa && fdisk_partition_has_start(pa) && ext_pe
+ && pa->start >= l->ext_offset
+ && pa->start <= get_abs_partition_end(ext_pe)) {
+ DBG(LABEL, ul_debug("DOS: pa template %p: add logical", pa));
+ rc = add_logical(cxt, pa, &res);
+ goto done;
+
+ /* pa specifies that extended partition is wanted */
+ } else if (pa && pa->type && pa->type->code == MBR_DOS_EXTENDED_PARTITION) {
+ DBG(LABEL, ul_debug("DOS: pa template %p: add extened", pa));
+ if (l->ext_offset) {
+ fdisk_warnx(cxt, _("Extended partition already exists."));
+ return -EINVAL;
+ }
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0) {
+ rc = add_partition(cxt, res, pa);
+ goto done;
+ }
+
+ /* pa specifies start, but outside extended partition */
+ } else if (pa && fdisk_partition_has_start(pa) && l->ext_offset) {
+ DBG(LABEL, ul_debug("DOS: pa template %p: add primary", pa));
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0) {
+ rc = add_partition(cxt, res, pa);
+ goto done;
+ }
+ }
+
+ /*
+ * dialog driven partitioning (it does not mean that @pa template is
+ * completely ignored!)
+ */
+
+ /* check if there is space for primary partition */
+ grain = cxt->grain > cxt->sector_size ? cxt->grain / cxt->sector_size : 1;
+ last = cxt->first_lba;
+
+ for (i = 0; i < 4; i++) {
+ struct dos_partition *p = self_partition(cxt, i);
+
+ if (is_used_partition(p)) {
+ fdisk_sector_t start = dos_partition_get_start(p);
+ if (last + grain <= start)
+ free_sectors = 1;
+ last = start + dos_partition_get_size(p);
+ } else
+ free_primary++;
+ }
+ if (last + grain < cxt->total_sectors - 1)
+ free_sectors = 1;
+
+ if (!free_primary && cxt->label->nparts_max >= MAXIMUM_PARTS) {
+ fdisk_info(cxt, _("The maximum number of partitions has "
+ "been created."));
+ return -EINVAL;
+ }
+ rc = 1;
+
+ if (!free_primary || !free_sectors) {
+ DBG(LABEL, ul_debug("DOS: primary impossible, add logical"));
+ if (l->ext_offset) {
+ if (!pa || fdisk_partition_has_start(pa)) {
+ if (!free_primary)
+ fdisk_info(cxt, _("All primary partitions are in use."));
+ else if (!free_sectors)
+ fdisk_info(cxt, _("All space for primary partitions is in use."));
+ }
+ rc = add_logical(cxt, pa, &res);
+ } else {
+ fdisk_info(cxt,
+ _( "Impossible to create another primary partition. "
+ "If you want to create more partitions, you must "
+ "replace a primary partition with an extended "
+ "partition first."));
+ return -EINVAL;
+ }
+ } else if (cxt->label->nparts_max >= MAXIMUM_PARTS) {
+ fdisk_info(cxt, _("All logical partitions are in use. "
+ "Adding a primary partition."));
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0)
+ rc = add_partition(cxt, res, pa);
+ } else {
+ char hint[BUFSIZ];
+ struct fdisk_ask *ask;
+ int c;
+
+ /* the default layout for scripts is to create primary partitions */
+ if (cxt->script) {
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0)
+ rc = add_partition(cxt, res, pa);
+ goto done;
+ }
+
+ ask = fdisk_new_ask();
+ if (!ask)
+ return -ENOMEM;
+ fdisk_ask_set_type(ask, FDISK_ASKTYPE_MENU);
+ fdisk_ask_set_query(ask, _("Partition type"));
+ fdisk_ask_menu_set_default(ask, free_primary == 1
+ && !l->ext_offset ? 'e' : 'p');
+ snprintf(hint, sizeof(hint),
+ _("%zu primary, %d extended, %zu free"),
+ 4 - (l->ext_offset ? 1 : 0) - free_primary,
+ l->ext_offset ? 1 : 0,
+ free_primary);
+
+ fdisk_ask_menu_add_item(ask, 'p', _("primary"), hint);
+ if (!l->ext_offset)
+ fdisk_ask_menu_add_item(ask, 'e', _("extended"), _("container for logical partitions"));
+ else
+ fdisk_ask_menu_add_item(ask, 'l', _("logical"), _("numbered from 5"));
+
+ rc = fdisk_do_ask(cxt, ask);
+ if (rc)
+ return rc;
+ fdisk_ask_menu_get_result(ask, &c);
+ fdisk_unref_ask(ask);
+
+ if (c == 'p') {
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0)
+ rc = add_partition(cxt, res, pa);
+ goto done;
+ } else if (c == 'l' && l->ext_offset) {
+ rc = add_logical(cxt, pa, &res);
+ goto done;
+ } else if (c == 'e' && !l->ext_offset) {
+ rc = get_partition_unused_primary(cxt, pa, &res);
+ if (rc == 0) {
+ struct fdisk_partition *xpa = NULL;
+ struct fdisk_parttype *t;
+
+ t = fdisk_label_get_parttype_from_code(cxt->label,
+ MBR_DOS_EXTENDED_PARTITION);
+ if (!pa) {
+ pa = xpa = fdisk_new_partition();
+ if (!xpa)
+ return -ENOMEM;
+ }
+ fdisk_partition_set_type(pa, t);
+ rc = add_partition(cxt, res, pa);
+ if (xpa) {
+ fdisk_unref_partition(xpa);
+ pa = NULL;
+ }
+ }
+ goto done;
+ } else
+ fdisk_warnx(cxt, _("Invalid partition type `%c'."), c);
+ }
+done:
+ if (rc == 0) {
+ cxt->label->nparts_cur++;
+ if (partno)
+ *partno = res;
+ }
+ return rc;
+}
+
+static int write_sector(struct fdisk_context *cxt, fdisk_sector_t secno,
+ unsigned char *buf)
+{
+ int rc;
+
+ rc = seek_sector(cxt, secno);
+ if (rc != 0) {
+ fdisk_warn(cxt, _("Cannot write sector %jd: seek failed"),
+ (uintmax_t) secno);
+ return rc;
+ }
+
+ DBG(LABEL, ul_debug("DOS: writting to sector %ju", (uintmax_t) secno));
+
+ if (write(cxt->dev_fd, buf, cxt->sector_size) != (ssize_t) cxt->sector_size)
+ return -errno;
+ return 0;
+}
+
+static int dos_write_disklabel(struct fdisk_context *cxt)
+{
+ struct fdisk_dos_label *l = self_label(cxt);
+ size_t i;
+ int rc = 0, mbr_changed = 0;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ mbr_changed = l->non_pt_changed;
+
+ /* MBR (primary partitions) */
+ if (!mbr_changed) {
+ for (i = 0; i < 4; i++) {
+ struct pte *pe = self_pte(cxt, i);
+ if (pe->changed)
+ mbr_changed = 1;
+ }
+ }
+ if (mbr_changed) {
+ mbr_set_magic(cxt->firstsector);
+ rc = write_sector(cxt, 0, cxt->firstsector);
+ if (rc)
+ goto done;
+ }
+
+ if (cxt->label->nparts_max <= 4 && l->ext_offset) {
+ /* we have empty extended partition, check if the partition has
+ * been modified and then cleanup possible remaining EBR */
+ struct pte *pe = self_pte(cxt, l->ext_index);
+ unsigned char empty[512] = { 0 };
+ fdisk_sector_t off = pe ? get_abs_partition_start(pe) : 0;
+
+ if (off && pe->changed) {
+ mbr_set_magic(empty);
+ write_sector(cxt, off, empty);
+ }
+ }
+
+ /* EBR (logical partitions) */
+ for (i = 4; i < cxt->label->nparts_max; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ if (!pe->changed || !pe->offset || !pe->sectorbuffer)
+ continue;
+
+ mbr_set_magic(pe->sectorbuffer);
+ rc = write_sector(cxt, pe->offset, pe->sectorbuffer);
+ if (rc)
+ goto done;
+ }
+
+done:
+ return rc;
+}
+
+static int dos_locate_disklabel(struct fdisk_context *cxt, int n,
+ const char **name, off_t *offset, size_t *size)
+{
+ assert(cxt);
+
+ *name = NULL;
+ *offset = 0;
+ *size = 0;
+
+ switch (n) {
+ case 0:
+ *name = "MBR";
+ *offset = 0;
+ *size = 512;
+ break;
+ default:
+ /* extended partitions */
+ if (n - 1 + 4 < cxt->label->nparts_max) {
+ struct pte *pe = self_pte(cxt, n - 1 + 4);
+
+ assert(pe->private_sectorbuffer);
+
+ *name = "EBR";
+ *offset = pe->offset * cxt->sector_size;
+ *size = 512;
+ } else
+ return 1;
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Check whether partition entries are ordered by their starting positions.
+ * Return 0 if OK. Return i if partition i should have been earlier.
+ * Two separate checks: primary and logical partitions.
+ */
+static int wrong_p_order(struct fdisk_context *cxt, size_t *prev)
+{
+ size_t last_p_start_pos = 0, p_start_pos;
+ size_t i, last_i = 0;
+
+ for (i = 0 ; i < cxt->label->nparts_max; i++) {
+
+ struct pte *pe = self_pte(cxt, i);
+ struct dos_partition *p = pe->pt_entry;
+
+ if (i == 4) {
+ last_i = 4;
+ last_p_start_pos = 0;
+ }
+ if (is_used_partition(p)) {
+ p_start_pos = get_abs_partition_start(pe);
+
+ if (last_p_start_pos > p_start_pos) {
+ if (prev)
+ *prev = last_i;
+ return i;
+ }
+
+ last_p_start_pos = p_start_pos;
+ last_i = i;
+ }
+ }
+ return 0;
+}
+
+static int dos_list_disklabel(struct fdisk_context *cxt)
+{
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ return 0;
+}
+
+static int dos_get_partition(struct fdisk_context *cxt, size_t n,
+ struct fdisk_partition *pa)
+{
+ struct dos_partition *p;
+ struct pte *pe;
+ struct fdisk_dos_label *lb;
+
+ assert(cxt);
+ assert(pa);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ lb = self_label(cxt);
+ pe = self_pte(cxt, n);
+ p = pe->pt_entry;
+ pa->used = !is_cleared_partition(p);
+ if (!pa->used)
+ return 0;
+
+ pa->type = dos_partition_parttype(cxt, p);
+ pa->boot = p->boot_ind == ACTIVE_FLAG ? 1 : 0;
+ pa->start = get_abs_partition_start(pe);
+ pa->size = dos_partition_get_size(p);
+ pa->container = lb->ext_offset && n == lb->ext_index;
+
+ if (n >= 4)
+ pa->parent_partno = lb->ext_index;
+
+ if (p->boot_ind && asprintf(&pa->attrs, "%02x", p->boot_ind) < 0)
+ return -ENOMEM;
+
+ /* start C/H/S */
+ if (asprintf(&pa->start_chs, "%d/%d/%d",
+ cylinder(p->bs, p->bc),
+ sector(p->bs),
+ p->bh) < 0)
+ return -ENOMEM;
+
+ /* end C/H/S */
+ if (asprintf(&pa->end_chs, "%d/%d/%d",
+ cylinder(p->es, p->ec),
+ sector(p->es),
+ p->eh) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int dos_set_partition(struct fdisk_context *cxt, size_t n,
+ struct fdisk_partition *pa)
+{
+ struct fdisk_dos_label *l;
+ struct dos_partition *p;
+ struct pte *pe;
+ fdisk_sector_t start, size;
+
+ assert(cxt);
+ assert(pa);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ if (n >= cxt->label->nparts_max)
+ return -EINVAL;
+
+ if (pa->type && IS_EXTENDED(pa->type->code)) {
+ fdisk_warnx(cxt, _("You cannot change a partition into an "
+ "extended one or vice versa. Delete it first."));
+ return -EINVAL;
+ }
+
+ if (pa->type && !pa->type->code)
+ fdisk_warnx(cxt, _("Type 0 means free space to many systems. "
+ "Having partitions of type 0 is probably unwise."));
+ l = self_label(cxt);
+ p = self_partition(cxt, n);
+ pe = self_pte(cxt, n);
+
+ FDISK_INIT_UNDEF(start);
+ FDISK_INIT_UNDEF(size);
+
+ if (fdisk_partition_has_start(pa))
+ start = pa->start;
+ if (fdisk_partition_has_size(pa))
+ size = pa->size;
+
+ if (pa->end_follow_default) {
+ fdisk_sector_t first[cxt->label->nparts_max],
+ last[cxt->label->nparts_max],
+ xlast;
+ struct pte *ext = l->ext_offset ? self_pte(cxt, l->ext_index) : NULL;
+
+ fill_bounds(cxt, first, last);
+
+ if (ext && l->ext_offset) {
+ first[l->ext_index] = l->ext_offset;
+ last[l->ext_index] = get_abs_partition_end(ext);
+ }
+ if (FDISK_IS_UNDEF(start))
+ start = get_abs_partition_start(pe);
+
+ DBG(LABEL, ul_debug("DOS: #%zu now %ju +%ju sectors",
+ n, (uintmax_t) start, (uintmax_t) dos_partition_get_size(p)));
+
+ xlast = get_unused_last(cxt, n, start, first, last);
+ size = xlast ? xlast - start + 1: dos_partition_get_size(p);
+
+ DBG(LABEL, ul_debug("DOS: #%zu wanted %ju +%ju sectors",
+ n, (uintmax_t) start, (uintmax_t) size));
+ }
+
+ if (!FDISK_IS_UNDEF(start) || !FDISK_IS_UNDEF(size)) {
+ DBG(LABEL, ul_debug("DOS: resize partition"));
+
+ if (FDISK_IS_UNDEF(start))
+ start = get_abs_partition_start(pe);
+ if (FDISK_IS_UNDEF(size))
+ size = dos_partition_get_size(p);
+
+ set_partition(cxt, n, 0, start, start + size - 1,
+ pa->type ? pa->type->code : p->sys_ind,
+ pa->boot == 1);
+ } else {
+ DBG(LABEL, ul_debug("DOS: keep size, modify properties"));
+ if (pa->type)
+ p->sys_ind = pa->type->code;
+ if (!FDISK_IS_UNDEF(pa->boot))
+ p->boot_ind = pa->boot == 1 ? ACTIVE_FLAG : 0;
+ }
+
+ partition_set_changed(cxt, n, 1);
+ return 0;
+}
+
+static void print_chain_of_logicals(struct fdisk_context *cxt)
+{
+ size_t i;
+ struct fdisk_dos_label *l = self_label(cxt);
+
+ fputc('\n', stdout);
+
+ for (i = 4; i < cxt->label->nparts_max; i++) {
+ struct pte *pe = self_pte(cxt, i);
+
+ fprintf(stderr, "#%02zu EBR [%10ju], "
+ "data[start=%10ju (%10ju), size=%10ju], "
+ "link[start=%10ju (%10ju), size=%10ju]\n",
+ i, (uintmax_t) pe->offset,
+ /* data */
+ (uintmax_t) dos_partition_get_start(pe->pt_entry),
+ (uintmax_t) get_abs_partition_start(pe),
+ (uintmax_t) dos_partition_get_size(pe->pt_entry),
+ /* link */
+ (uintmax_t) dos_partition_get_start(pe->ex_entry),
+ (uintmax_t) l->ext_offset + dos_partition_get_start(pe->ex_entry),
+ (uintmax_t) dos_partition_get_size(pe->ex_entry));
+ }
+}
+
+static int cmp_ebr_offsets(const void *a, const void *b)
+{
+ struct pte *ae = (struct pte *) a,
+ *be = (struct pte *) b;
+
+ if (ae->offset == 0 && be->offset == 0)
+ return 0;
+ if (ae->offset == 0)
+ return 1;
+ if (be->offset == 0)
+ return -1;
+
+ return cmp_numbers(ae->offset, be->offset);
+}
+
+/*
+ * Fix the chain of logicals.
+ *
+ * The function does not modify data partitions within EBR tables
+ * (pte->pt_entry). It sorts the chain by EBR offsets and then update links
+ * (pte->ex_entry) between EBR tables.
+ *
+ */
+static void fix_chain_of_logicals(struct fdisk_context *cxt)
+{
+ struct fdisk_dos_label *l = self_label(cxt);
+ struct pte *last;
+ size_t i;
+
+ DBG(LABEL, print_chain_of_logicals(cxt));
+
+ /* Sort chain by EBR offsets */
+ qsort(&l->ptes[4], cxt->label->nparts_max - 4, sizeof(struct pte),
+ cmp_ebr_offsets);
+
+again:
+ /* Sort data partitions by start */
+ for (i = 4; i < cxt->label->nparts_max - 1; i++) {
+ struct pte *cur = self_pte(cxt, i),
+ *nxt = self_pte(cxt, i + 1);
+
+ if (get_abs_partition_start(cur) >
+ get_abs_partition_start(nxt)) {
+
+ struct dos_partition tmp = *cur->pt_entry;
+ fdisk_sector_t cur_start = get_abs_partition_start(cur),
+ nxt_start = get_abs_partition_start(nxt);
+
+ /* swap data partitions */
+ *cur->pt_entry = *nxt->pt_entry;
+ *nxt->pt_entry = tmp;
+
+ /* Recount starts according to EBR offsets, the absolute
+ * address tas to be still the same! */
+ dos_partition_set_start(cur->pt_entry, nxt_start - cur->offset);
+ dos_partition_set_start(nxt->pt_entry, cur_start - nxt->offset);
+
+ partition_set_changed(cxt, i, 1);
+ partition_set_changed(cxt, i + 1, 1);
+ goto again;
+ }
+ }
+
+ /* Update EBR links */
+ for (i = 4; i < cxt->label->nparts_max - 1; i++) {
+ struct pte *cur = self_pte(cxt, i),
+ *nxt = self_pte(cxt, i + 1);
+
+ fdisk_sector_t noff = nxt->offset - l->ext_offset,
+ ooff = dos_partition_get_start(cur->ex_entry);
+
+ if (noff == ooff)
+ continue;
+
+ DBG(LABEL, ul_debug("DOS: fix EBR [%10ju] link %ju -> %ju",
+ (uintmax_t) cur->offset,
+ (uintmax_t) ooff, (uintmax_t) noff));
+
+ set_partition(cxt, i, 1, nxt->offset,
+ get_abs_partition_end(nxt),
+ MBR_DOS_EXTENDED_PARTITION, 0);
+ }
+
+ /* always terminate the chain ! */
+ last = self_pte(cxt, cxt->label->nparts_max - 1);
+ if (last) {
+ clear_partition(last->ex_entry);
+ partition_set_changed(cxt, cxt->label->nparts_max - 1, 1);
+ }
+
+ DBG(LABEL, print_chain_of_logicals(cxt));
+}
+
+static int dos_reorder(struct fdisk_context *cxt)
+{
+ struct pte *pei, *pek;
+ size_t i,k;
+
+ if (!wrong_p_order(cxt, NULL)) {
+ fdisk_info(cxt, _("Nothing to do. Ordering is correct already."));
+ return 0;
+ }
+
+ while ((i = wrong_p_order(cxt, &k)) != 0 && i < 4) {
+ /* partition i should have come earlier, move it */
+ /* We have to move data in the MBR */
+ struct dos_partition *pi, *pk, *pe, pbuf;
+ pei = self_pte(cxt, i);
+ pek = self_pte(cxt, k);
+
+ pe = pei->ex_entry;
+ pei->ex_entry = pek->ex_entry;
+ pek->ex_entry = pe;
+
+ pi = pei->pt_entry;
+ pk = pek->pt_entry;
+
+ memmove(&pbuf, pi, sizeof(struct dos_partition));
+ memmove(pi, pk, sizeof(struct dos_partition));
+ memmove(pk, &pbuf, sizeof(struct dos_partition));
+
+ partition_set_changed(cxt, i, 1);
+ partition_set_changed(cxt, k, 1);
+ }
+
+ if (i)
+ fix_chain_of_logicals(cxt);
+
+ fdisk_info(cxt, _("Done."));
+ return 0;
+}
+
+/* TODO: use fdisk_set_partition() API */
+int fdisk_dos_move_begin(struct fdisk_context *cxt, size_t i)
+{
+ struct pte *pe;
+ struct dos_partition *p;
+ unsigned int new, free_start, curr_start, last;
+ uintmax_t res = 0;
+ size_t x;
+ int rc;
+
+ assert(cxt);
+ assert(fdisk_is_label(cxt, DOS));
+
+ pe = self_pte(cxt, i);
+ p = pe->pt_entry;
+
+ if (!is_used_partition(p) || IS_EXTENDED (p->sys_ind)) {
+ fdisk_warnx(cxt, _("Partition %zu: no data area."), i + 1);
+ return 0;
+ }
+
+ /* the default start is at the second sector of the disk or at the
+ * second sector of the extended partition
+ */
+ free_start = pe->offset ? pe->offset + 1 : 1;
+
+ curr_start = get_abs_partition_start(pe);
+
+ /* look for a free space before the current start of the partition */
+ for (x = 0; x < cxt->label->nparts_max; x++) {
+ unsigned int end;
+ struct pte *prev_pe = self_pte(cxt, x);
+ struct dos_partition *prev_p = prev_pe->pt_entry;
+
+ if (!prev_p)
+ continue;
+ end = get_abs_partition_start(prev_pe)
+ + dos_partition_get_size(prev_p);
+
+ if (is_used_partition(prev_p) &&
+ end > free_start && end <= curr_start)
+ free_start = end;
+ }
+
+ last = get_abs_partition_end(pe);
+
+ rc = fdisk_ask_number(cxt, free_start, curr_start, last,
+ _("New beginning of data"), &res);
+ if (rc)
+ return rc;
+
+ new = res - pe->offset;
+
+ if (new != dos_partition_get_size(p)) {
+ unsigned int sects = dos_partition_get_size(p)
+ + dos_partition_get_start(p) - new;
+
+ dos_partition_set_size(p, sects);
+ dos_partition_set_start(p, new);
+
+ partition_set_changed(cxt, i, 1);
+ }
+
+ return rc;
+}
+
+static int dos_partition_is_used(
+ struct fdisk_context *cxt,
+ size_t i)
+{
+ struct dos_partition *p;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ if (i >= cxt->label->nparts_max)
+ return 0;
+
+ p = self_partition(cxt, i);
+
+ return p && !is_cleared_partition(p);
+}
+
+static int dos_toggle_partition_flag(
+ struct fdisk_context *cxt,
+ size_t i,
+ unsigned long flag)
+{
+ struct dos_partition *p;
+
+ assert(cxt);
+ assert(cxt->label);
+ assert(fdisk_is_label(cxt, DOS));
+
+ if (i >= cxt->label->nparts_max)
+ return -EINVAL;
+
+ p = self_partition(cxt, i);
+
+ switch (flag) {
+ case DOS_FLAG_ACTIVE:
+ if (IS_EXTENDED(p->sys_ind) && !p->boot_ind)
+ fdisk_warnx(cxt, _("Partition %zu: is an extended "
+ "partition."), i + 1);
+
+ p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG);
+ partition_set_changed(cxt, i, 1);
+ fdisk_info(cxt, p->boot_ind ?
+ _("The bootable flag on partition %zu is enabled now.") :
+ _("The bootable flag on partition %zu is disabled now."),
+ i + 1);
+ break;
+ default:
+ return 1;
+ }
+
+ return 0;
+}
+
+static const struct fdisk_field dos_fields[] =
+{
+ /* basic */
+ { FDISK_FIELD_DEVICE, N_("Device"), 10, 0 },
+ { FDISK_FIELD_BOOT, N_("Boot"), 1, 0 },
+ { FDISK_FIELD_START, N_("Start"), 5, FDISK_FIELDFL_NUMBER },
+ { FDISK_FIELD_END, N_("End"), 5, FDISK_FIELDFL_NUMBER },
+ { FDISK_FIELD_SECTORS, N_("Sectors"), 5, FDISK_FIELDFL_NUMBER },
+ { FDISK_FIELD_CYLINDERS,N_("Cylinders"), 5, FDISK_FIELDFL_NUMBER },
+ { FDISK_FIELD_SIZE, N_("Size"), 5, FDISK_FIELDFL_NUMBER | FDISK_FIELDFL_EYECANDY },
+ { FDISK_FIELD_TYPEID, N_("Id"), 2, FDISK_FIELDFL_NUMBER },
+ { FDISK_FIELD_TYPE, N_("Type"), 0.1, 0 },
+
+ /* expert mode */
+ { FDISK_FIELD_SADDR, N_("Start-C/H/S"), 1, FDISK_FIELDFL_NUMBER | FDISK_FIELDFL_DETAIL },
+ { FDISK_FIELD_EADDR, N_("End-C/H/S"), 1, FDISK_FIELDFL_NUMBER | FDISK_FIELDFL_DETAIL },
+ { FDISK_FIELD_ATTR, N_("Attrs"), 2, FDISK_FIELDFL_NUMBER | FDISK_FIELDFL_DETAIL }
+
+};
+
+static const struct fdisk_label_operations dos_operations =
+{
+ .probe = dos_probe_label,
+ .write = dos_write_disklabel,
+ .verify = dos_verify_disklabel,
+ .create = dos_create_disklabel,
+ .locate = dos_locate_disklabel,
+ .list = dos_list_disklabel,
+ .reorder = dos_reorder,
+ .get_id = dos_get_disklabel_id,
+ .set_id = dos_set_disklabel_id,
+
+ .get_part = dos_get_partition,
+ .set_part = dos_set_partition,
+ .add_part = dos_add_partition,
+ .del_part = dos_delete_partition,
+
+ .part_toggle_flag = dos_toggle_partition_flag,
+ .part_is_used = dos_partition_is_used,
+
+ .reset_alignment = dos_reset_alignment,
+
+ .deinit = dos_deinit,
+};
+
+/*
+ * allocates DOS in-memory stuff
+ */
+struct fdisk_label *fdisk_new_dos_label(struct fdisk_context *cxt)
+{
+ struct fdisk_label *lb;
+ struct fdisk_dos_label *dos;
+
+ assert(cxt);
+
+ dos = calloc(1, sizeof(*dos));
+ if (!dos)
+ return NULL;
+
+ /* initialize generic part of the driver */
+ lb = (struct fdisk_label *) dos;
+ lb->name = "dos";
+ lb->id = FDISK_DISKLABEL_DOS;
+ lb->op = &dos_operations;
+ lb->parttypes = dos_parttypes;
+ lb->nparttypes = ARRAY_SIZE(dos_parttypes) - 1;
+ lb->fields = dos_fields;
+ lb->nfields = ARRAY_SIZE(dos_fields);
+
+ return lb;
+}
+
+/**
+ * fdisk_dos_enable_compatible:
+ * @lb: DOS label (see fdisk_get_label())
+ * @enable: 0 or 1
+ *
+ * Enables deprecated DOS compatible mode, in this mode library checks for
+ * cylinders boundary, cases about CHS addressing and another obscure things.
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int fdisk_dos_enable_compatible(struct fdisk_label *lb, int enable)
+{
+ struct fdisk_dos_label *dos = (struct fdisk_dos_label *) lb;
+
+ if (!lb)
+ return -EINVAL;
+
+ dos->compatible = enable;
+ if (enable)
+ lb->flags |= FDISK_LABEL_FL_REQUIRE_GEOMETRY;
+ return 0;
+}
+
+/**
+ * fdisk_dos_is_compatible:
+ * @lb: DOS label
+ *
+ * Returns: 0 if DOS compatibility disabled, 1 if enabled
+ */
+int fdisk_dos_is_compatible(struct fdisk_label *lb)
+{
+ return ((struct fdisk_dos_label *) lb)->compatible;
+}