| |
| #include "c.h" |
| #include "strutils.h" |
| |
| #ifdef HAVE_LIBBLKID |
| # include <blkid.h> |
| #endif |
| |
| #include "fdiskP.h" |
| |
| /** |
| * SECTION: partition |
| * @title: Partition |
| * @short_description: generic label independent partition abstraction |
| * |
| * The fdisk_partition provides label independent abstraction. The partitions |
| * are not directly connected with partition table (label) data. Any change to |
| * fdisk_partition does not affects in-memory or on-disk label data. |
| * |
| * The fdisk_partition is possible to use as a template for |
| * fdisk_add_partition() or fdisk_set_partition() operations. |
| */ |
| |
| static void init_partition(struct fdisk_partition *pa) |
| { |
| FDISK_INIT_UNDEF(pa->size); |
| FDISK_INIT_UNDEF(pa->start); |
| FDISK_INIT_UNDEF(pa->partno); |
| FDISK_INIT_UNDEF(pa->parent_partno); |
| FDISK_INIT_UNDEF(pa->boot); |
| |
| INIT_LIST_HEAD(&pa->parts); |
| } |
| |
| /** |
| * fdisk_new_partition: |
| * |
| * Returns: new instance. |
| */ |
| struct fdisk_partition *fdisk_new_partition(void) |
| { |
| struct fdisk_partition *pa = calloc(1, sizeof(*pa)); |
| |
| pa->refcount = 1; |
| init_partition(pa); |
| DBG(PART, ul_debugobj(pa, "alloc")); |
| return pa; |
| } |
| |
| /** |
| * fdisk_reset_partition: |
| * @pa: partition |
| * |
| * Resets partition content. |
| */ |
| void fdisk_reset_partition(struct fdisk_partition *pa) |
| { |
| int ref; |
| |
| if (!pa) |
| return; |
| |
| DBG(PART, ul_debugobj(pa, "reset")); |
| ref = pa->refcount; |
| |
| fdisk_unref_parttype(pa->type); |
| free(pa->name); |
| free(pa->uuid); |
| free(pa->attrs); |
| free(pa->fstype); |
| free(pa->fsuuid); |
| free(pa->fslabel); |
| free(pa->start_chs); |
| free(pa->end_chs); |
| |
| memset(pa, 0, sizeof(*pa)); |
| pa->refcount = ref; |
| |
| init_partition(pa); |
| } |
| |
| static struct fdisk_partition *__copy_partition(struct fdisk_partition *o) |
| { |
| struct fdisk_partition *n = fdisk_new_partition(); |
| |
| if (!n) |
| return NULL; |
| memcpy(n, o, sizeof(*n)); |
| if (n->type) |
| fdisk_ref_parttype(n->type); |
| if (o->name) |
| n->name = strdup(o->name); |
| if (o->uuid) |
| n->uuid = strdup(o->uuid); |
| if (o->attrs) |
| n->attrs = strdup(o->attrs); |
| if (o->fstype) |
| n->fstype = strdup(o->fstype); |
| if (o->fsuuid) |
| n->fsuuid = strdup(o->fsuuid); |
| if (o->fslabel) |
| n->fslabel = strdup(o->fslabel); |
| |
| return n; |
| } |
| |
| /** |
| * fdisk_ref_partition: |
| * @pa: partition pointer |
| * |
| * Increments reference counter. |
| */ |
| void fdisk_ref_partition(struct fdisk_partition *pa) |
| { |
| if (pa) |
| pa->refcount++; |
| } |
| |
| /** |
| * fdisk_unref_partition: |
| * @pa: partition pointer |
| * |
| * Decrements reference counter, on zero the @pa is automatically |
| * deallocated. |
| */ |
| void fdisk_unref_partition(struct fdisk_partition *pa) |
| { |
| if (!pa) |
| return; |
| |
| pa->refcount--; |
| if (pa->refcount <= 0) { |
| list_del(&pa->parts); |
| fdisk_reset_partition(pa); |
| DBG(PART, ul_debugobj(pa, "free")); |
| free(pa); |
| } |
| } |
| |
| /** |
| * fdisk_partition_set_start: |
| * @pa: partition |
| * @off: offset in sectors, maximal is UINT64_MAX-1 |
| * |
| * Note that zero is valid offset too. Use fdisk_partition_unset_start() to |
| * undefine the offset. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_set_start(struct fdisk_partition *pa, fdisk_sector_t off) |
| { |
| if (!pa) |
| return -EINVAL; |
| if (FDISK_IS_UNDEF(off)) |
| return -ERANGE; |
| pa->start = off; |
| pa->fs_probed = 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_unset_start: |
| * @pa: partition |
| * |
| * Sets the size as undefined. See fdisk_partition_has_start(). |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_unset_start(struct fdisk_partition *pa) |
| { |
| if (!pa) |
| return -EINVAL; |
| FDISK_INIT_UNDEF(pa->start); |
| pa->fs_probed = 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_get_start: |
| * @pa: partition |
| * |
| * The zero is also valid offset. The function may return random undefined |
| * value when start offset is undefined (for example after |
| * fdisk_partition_unset_start()). Always use fdisk_partition_has_start() to be |
| * sure that you work with valid numbers. |
| * |
| * Returns: start offset in sectors |
| */ |
| fdisk_sector_t fdisk_partition_get_start(struct fdisk_partition *pa) |
| { |
| return pa->start; |
| } |
| |
| /** |
| * fdisk_partition_has_start: |
| * @pa: partition |
| * |
| * Returns: 1 or 0 |
| */ |
| int fdisk_partition_has_start(struct fdisk_partition *pa) |
| { |
| return pa && !FDISK_IS_UNDEF(pa->start); |
| } |
| |
| |
| /** |
| * fdisk_partition_cmp_start: |
| * @a: partition |
| * @b: partition |
| * |
| * Compares partitions according to start offset, See fdisk_table_sort_partitions(). |
| * |
| * Return: 0 if the same, <0 if @b greater, >0 if @a greater. |
| */ |
| int fdisk_partition_cmp_start(struct fdisk_partition *a, |
| struct fdisk_partition *b) |
| { |
| int no_a = FDISK_IS_UNDEF(a->start), |
| no_b = FDISK_IS_UNDEF(b->start); |
| |
| if (no_a && no_b) |
| return 0; |
| if (no_a) |
| return -1; |
| if (no_b) |
| return 1; |
| |
| return cmp_numbers(a->start, b->start); |
| } |
| |
| /** |
| * fdisk_partition_start_follow_default |
| * @pa: partition |
| * @enable: 0|1 |
| * |
| * When @pa used as a template for fdisk_add_partition() when force label driver |
| * to use the first possible space for the new partition. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_start_follow_default(struct fdisk_partition *pa, int enable) |
| { |
| if (!pa) |
| return -EINVAL; |
| pa->start_follow_default = enable ? 1 : 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_start_is_default: |
| * @pa: partition |
| * |
| * See fdisk_partition_start_follow_default(). |
| * |
| * Returns: 1 if the partition follows default |
| */ |
| int fdisk_partition_start_is_default(struct fdisk_partition *pa) |
| { |
| assert(pa); |
| return pa->start_follow_default; |
| } |
| |
| /** |
| * fdisk_partition_set_size: |
| * @pa: partition |
| * @sz: size in sectors, maximal is UIN64_MAX-1 |
| * |
| * Note that zero is valid size too. Use fdisk_partition_unset_size() to |
| * undefine the size. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_set_size(struct fdisk_partition *pa, fdisk_sector_t sz) |
| { |
| if (!pa) |
| return -EINVAL; |
| if (FDISK_IS_UNDEF(sz)) |
| return -ERANGE; |
| pa->size = sz; |
| pa->fs_probed = 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_unset_size: |
| * @pa: partition |
| * |
| * Sets the size as undefined. See fdisk_partition_has_size(). |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_unset_size(struct fdisk_partition *pa) |
| { |
| if (!pa) |
| return -EINVAL; |
| FDISK_INIT_UNDEF(pa->size); |
| pa->fs_probed = 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_get_size: |
| * @pa: partition |
| * |
| * The zero is also valid size. The function may return random undefined |
| * value when size is undefined (for example after fdisk_partition_unset_size()). |
| * Always use fdisk_partition_has_size() to be sure that you work with valid |
| * numbers. |
| * |
| * Returns: size offset in sectors |
| */ |
| fdisk_sector_t fdisk_partition_get_size(struct fdisk_partition *pa) |
| { |
| return pa->size; |
| } |
| |
| /** |
| * fdisk_partition_has_size: |
| * @pa: partition |
| * |
| * Returns: 1 or 0 |
| */ |
| int fdisk_partition_has_size(struct fdisk_partition *pa) |
| { |
| return pa && !FDISK_IS_UNDEF(pa->size); |
| } |
| |
| /** |
| * fdisk_partition_size_explicit: |
| * @pa: partition |
| * @enable: 0|1 |
| * |
| * By default libfdisk aligns the size when add the new partition (by |
| * fdisk_add_partition()). If you want to disable this functionality use |
| * @enable = 1. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_size_explicit(struct fdisk_partition *pa, int enable) |
| { |
| if (!pa) |
| return -EINVAL; |
| pa->size_explicit = enable ? 1 : 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_set_partno: |
| * @pa: partition |
| * @num: partition number (0 is the first partition, maximal is SIZE_MAX-1) |
| * |
| * Note that zero is valid partno too. Use fdisk_partition_unset_partno() to |
| * undefine the partno. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_set_partno(struct fdisk_partition *pa, size_t num) |
| { |
| if (!pa) |
| return -EINVAL; |
| if (FDISK_IS_UNDEF(num)) |
| return -ERANGE; |
| pa->partno = num; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_unset_partno: |
| * @pa: partition |
| * |
| * Sets the partno as undefined. See fdisk_partition_has_partno(). |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_unset_partno(struct fdisk_partition *pa) |
| { |
| if (!pa) |
| return -EINVAL; |
| FDISK_INIT_UNDEF(pa->partno); |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_get_partno: |
| * @pa: partition |
| * |
| * The zero is also valid partition number. The function may return random |
| * value when partno is undefined (for example after fdisk_partition_unset_partno()). |
| * Always use fdisk_partition_has_partno() to be sure that you work with valid |
| * numbers. |
| * |
| * Returns: partition number (0 is the first partition) |
| */ |
| size_t fdisk_partition_get_partno(struct fdisk_partition *pa) |
| { |
| return pa->partno; |
| } |
| |
| /** |
| * fdisk_partition_has_partno: |
| * @pa: partition |
| * |
| * Returns: 1 or 0 |
| */ |
| int fdisk_partition_has_partno(struct fdisk_partition *pa) |
| { |
| return pa && !FDISK_IS_UNDEF(pa->partno); |
| } |
| |
| |
| /** |
| * fdisk_partition_cmp_partno: |
| * @a: partition |
| * @b: partition |
| * |
| * Compares partitions according to partition number See fdisk_table_sort_partitions(). |
| * |
| * Return: 0 if the same, <0 if @b greater, >0 if @a greater. |
| */ |
| int fdisk_partition_cmp_partno(struct fdisk_partition *a, |
| struct fdisk_partition *b) |
| { |
| return a->partno - b->partno; |
| } |
| |
| /** |
| * fdisk_partition_partno_follow_default |
| * @pa: partition |
| * @enable: 0|1 |
| * |
| * When @pa used as a template for fdisk_add_partition() when force label driver |
| * to add a new partition to the default (next) position. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_partno_follow_default(struct fdisk_partition *pa, int enable) |
| { |
| if (!pa) |
| return -EINVAL; |
| pa->partno_follow_default = enable ? 1 : 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_set_type: |
| * @pa: partition |
| * @type: partition type |
| * |
| * Sets partition type. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_set_type(struct fdisk_partition *pa, |
| struct fdisk_parttype *type) |
| { |
| if (!pa) |
| return -EINVAL; |
| |
| fdisk_ref_parttype(type); |
| fdisk_unref_parttype(pa->type); |
| pa->type = type; |
| |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_get_type: |
| * @pa: partition |
| * |
| * Returns: pointer to partition type. |
| */ |
| struct fdisk_parttype *fdisk_partition_get_type(struct fdisk_partition *pa) |
| { |
| return pa ? pa->type : NULL; |
| } |
| |
| int fdisk_partition_set_name(struct fdisk_partition *pa, const char *name) |
| { |
| char *p = NULL; |
| |
| if (!pa) |
| return -EINVAL; |
| if (name) { |
| p = strdup(name); |
| if (!p) |
| return -ENOMEM; |
| } |
| free(pa->name); |
| pa->name = p; |
| return 0; |
| } |
| |
| const char *fdisk_partition_get_name(struct fdisk_partition *pa) |
| { |
| return pa ? pa->name : NULL; |
| } |
| |
| int fdisk_partition_set_uuid(struct fdisk_partition *pa, const char *uuid) |
| { |
| char *p = NULL; |
| |
| if (!pa) |
| return -EINVAL; |
| if (uuid) { |
| p = strdup(uuid); |
| if (!p) |
| return -ENOMEM; |
| } |
| free(pa->uuid); |
| pa->uuid = p; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_has_end: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition has defined last sector |
| */ |
| int fdisk_partition_has_end(struct fdisk_partition *pa) |
| { |
| return pa && !FDISK_IS_UNDEF(pa->start) && !FDISK_IS_UNDEF(pa->size); |
| } |
| |
| /** |
| * fdisk_partition_get_end: |
| * @pa: partition |
| * |
| * This function may returns absolute non-sense, always check |
| * fdisk_partition_has_end(). |
| * |
| * Note that partition end is defined by fdisk_partition_set_start() and |
| * fdisk_partition_set_size(). |
| * |
| * Returns: last partition sector LBA. |
| */ |
| fdisk_sector_t fdisk_partition_get_end(struct fdisk_partition *pa) |
| { |
| return pa->start + pa->size - (pa->size == 0 ? 0 : 1); |
| } |
| |
| /** |
| * fdisk_partition_end_follow_default |
| * @pa: partition |
| * @enable: 0|1 |
| * |
| * When @pa used as a template for fdisk_add_partition() when force label |
| * driver to use all the possible space for the new partition. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_end_follow_default(struct fdisk_partition *pa, int enable) |
| { |
| if (!pa) |
| return -EINVAL; |
| pa->end_follow_default = enable ? 1 : 0; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_end_is_default: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition follows default |
| */ |
| int fdisk_partition_end_is_default(struct fdisk_partition *pa) |
| { |
| assert(pa); |
| return pa->end_follow_default; |
| } |
| |
| /** |
| * fdisk_partition_get_uuid: |
| * @pa: partition |
| * |
| * Returns: partition UUID as string |
| */ |
| const char *fdisk_partition_get_uuid(struct fdisk_partition *pa) |
| { |
| return pa ? pa->uuid : NULL; |
| } |
| |
| /** |
| * fdisk_partition_get_attrs: |
| * @pa: partition |
| * |
| * Returns: partition attributes in string format |
| */ |
| const char *fdisk_partition_get_attrs(struct fdisk_partition *pa) |
| { |
| return pa ? pa->attrs : NULL; |
| } |
| |
| /** |
| * fdisk_partition_set_attrs: |
| * @pa: partition |
| * @attrs: attributes |
| * |
| * Sets @attrs to @pa. |
| * |
| * Return: 0 on success, <0 on error. |
| */ |
| int fdisk_partition_set_attrs(struct fdisk_partition *pa, const char *attrs) |
| { |
| char *p = NULL; |
| |
| if (!pa) |
| return -EINVAL; |
| if (attrs) { |
| p = strdup(attrs); |
| if (!p) |
| return -ENOMEM; |
| } |
| free(pa->attrs); |
| pa->attrs = p; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_is_nested: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition is nested (e.g. MBR logical partition) |
| */ |
| int fdisk_partition_is_nested(struct fdisk_partition *pa) |
| { |
| return pa && !FDISK_IS_UNDEF(pa->parent_partno); |
| } |
| |
| /** |
| * fdisk_partition_is_container: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition is container (e.g. MBR extended partition) |
| */ |
| int fdisk_partition_is_container(struct fdisk_partition *pa) |
| { |
| return pa && pa->container; |
| } |
| |
| /** |
| * fdisk_partition_get_parent: |
| * @pa: partition |
| * @parent: parent parno |
| * |
| * Returns: returns devno of the parent |
| */ |
| int fdisk_partition_get_parent(struct fdisk_partition *pa, size_t *parent) |
| { |
| if (pa && parent) |
| *parent = pa->parent_partno; |
| else |
| return -EINVAL; |
| return 0; |
| } |
| |
| /** |
| * fdisk_partition_is_used: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition points to some area |
| */ |
| int fdisk_partition_is_used(struct fdisk_partition *pa) |
| { |
| return pa && pa->used; |
| } |
| |
| /** |
| * fdisk_partition_is_bootable: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition has enabled boot flag |
| */ |
| int fdisk_partition_is_bootable(struct fdisk_partition *pa) |
| { |
| return pa && pa->boot == 1; |
| } |
| |
| /** |
| * fdisk_partition_is_freespace: |
| * @pa: partition |
| * |
| * Returns: 1 if @pa points to freespace |
| */ |
| int fdisk_partition_is_freespace(struct fdisk_partition *pa) |
| { |
| return pa && pa->freespace; |
| } |
| |
| /** |
| * fdisk_partition_is_wholedisk: |
| * @pa: partition |
| * |
| * Returns: 1 if the partition is special whole-disk (e.g. SUN) partition |
| */ |
| int fdisk_partition_is_wholedisk(struct fdisk_partition *pa) |
| { |
| return pa && pa->wholedisk; |
| } |
| |
| /** |
| * fdisk_partition_next_partno: |
| * @pa: partition |
| * @cxt: context |
| * @n: returns partition number |
| * |
| * If @pa specified and partno-follow-default (see fdisk_partition_partno_follow_default()) |
| * enabled then returns next expected partno or -ERANGE on error. |
| * |
| * If @pa is NULL, or @pa does not specify any semantic for the next partno |
| * then use Ask API to ask user for the next partno. In this case returns 1 if |
| * no free partition available. If fdisk dialogs are disabled then returns -EINVAL. |
| * |
| * Returns: 0 on success, <0 on error, or 1 for non-free partno by Ask API. |
| */ |
| int fdisk_partition_next_partno( |
| struct fdisk_partition *pa, |
| struct fdisk_context *cxt, |
| size_t *n) |
| { |
| if (!cxt || !n) |
| return -EINVAL; |
| |
| if (pa && pa->partno_follow_default) { |
| size_t i; |
| |
| DBG(PART, ul_debugobj(pa, "next partno (follow default)")); |
| |
| for (i = 0; i < cxt->label->nparts_max; i++) { |
| if (!fdisk_is_partition_used(cxt, i)) { |
| *n = i; |
| return 0; |
| } |
| } |
| return -ERANGE; |
| |
| } else if (pa && fdisk_partition_has_partno(pa)) { |
| |
| DBG(PART, ul_debugobj(pa, "next partno (specified=%zu)", pa->partno)); |
| |
| if (pa->partno >= cxt->label->nparts_max || |
| fdisk_is_partition_used(cxt, pa->partno)) |
| return -ERANGE; |
| *n = pa->partno; |
| return 0; |
| |
| } else if (fdisk_has_dialogs(cxt)) |
| return fdisk_ask_partnum(cxt, n, 1); |
| |
| return -EINVAL; |
| } |
| |
| static int probe_partition_content(struct fdisk_context *cxt, struct fdisk_partition *pa) |
| { |
| int rc = 1; /* nothing */ |
| |
| DBG(PART, ul_debugobj(pa, "start probe #%zu partition [cxt %p] >>>", pa->partno, cxt)); |
| |
| /* zeroize the current setting */ |
| strdup_to_struct_member(pa, fstype, NULL); |
| strdup_to_struct_member(pa, fsuuid, NULL); |
| strdup_to_struct_member(pa, fslabel, NULL); |
| |
| if (!fdisk_partition_has_start(pa) || |
| !fdisk_partition_has_size(pa)) |
| goto done; |
| |
| #ifdef HAVE_LIBBLKID |
| else { |
| uintmax_t start, size; |
| |
| blkid_probe pr = blkid_new_probe(); |
| if (!pr) |
| goto done; |
| |
| DBG(PART, ul_debugobj(pa, "blkid prober: %p", pr)); |
| |
| start = fdisk_partition_get_start(pa) * fdisk_get_sector_size(cxt); |
| size = fdisk_partition_get_size(pa) * fdisk_get_sector_size(cxt); |
| |
| if (blkid_probe_set_device(pr, cxt->dev_fd, start, size) == 0 |
| && blkid_do_fullprobe(pr) == 0) { |
| |
| const char *data; |
| rc = 0; |
| |
| if (!blkid_probe_lookup_value(pr, "TYPE", &data, NULL)) |
| rc = strdup_to_struct_member(pa, fstype, data); |
| |
| if (!rc && !blkid_probe_lookup_value(pr, "LABEL", &data, NULL)) |
| rc = strdup_to_struct_member(pa, fslabel, data); |
| |
| if (!rc && !blkid_probe_lookup_value(pr, "UUID", &data, NULL)) |
| rc = strdup_to_struct_member(pa, fsuuid, data); |
| } |
| |
| blkid_free_probe(pr); |
| pa->fs_probed = 1; |
| } |
| #endif /* HAVE_LIBBLKID */ |
| |
| done: |
| DBG(PART, ul_debugobj(pa, "<<< end probe #%zu partition[cxt %p, rc=%d]", pa->partno, cxt, rc)); |
| return rc; |
| } |
| |
| /** |
| * fdisk_partition_to_string: |
| * @pa: partition |
| * @cxt: context |
| * @id: field (FDISK_FIELD_*) |
| * @data: returns string with allocated data |
| * |
| * Returns info about partition converted to printable string. |
| * |
| * For example |
| * <informalexample> |
| * <programlisting> |
| * struct fdisk_partition *pa; |
| * |
| * fdisk_get_partition(cxt, 0, &pa); |
| * fdisk_partition_to_string(pa, FDISK_FIELD_UUID, &data); |
| * printf("first partition uuid: %s\n", data); |
| * free(data); |
| * fdisk_unref_partition(pa); |
| * </programlisting> |
| * </informalexample> |
| * |
| * returns UUID for the first partition. |
| * |
| * Returns: 0 on success, otherwise, a corresponding error. |
| */ |
| int fdisk_partition_to_string(struct fdisk_partition *pa, |
| struct fdisk_context *cxt, |
| int id, |
| char **data) |
| { |
| char *p = NULL; |
| int rc = 0; |
| uint64_t x; |
| |
| if (!pa || !cxt || !data) |
| return -EINVAL; |
| |
| switch (id) { |
| case FDISK_FIELD_DEVICE: |
| if (pa->freespace) |
| p = strdup(_("Free space")); |
| else if (fdisk_partition_has_partno(pa) && cxt->dev_path) { |
| if (cxt->label->flags & FDISK_LABEL_FL_INCHARS_PARTNO) |
| rc = asprintf(&p, "%c", (int) pa->partno + 'a'); |
| else |
| p = fdisk_partname(cxt->dev_path, pa->partno + 1); |
| } |
| break; |
| case FDISK_FIELD_BOOT: |
| p = fdisk_partition_is_bootable(pa) ? strdup("*") : NULL; |
| break; |
| case FDISK_FIELD_START: |
| if (fdisk_partition_has_start(pa)) { |
| x = fdisk_cround(cxt, pa->start); |
| rc = pa->start_post ? |
| asprintf(&p, "%"PRIu64"%c", x, pa->start_post) : |
| asprintf(&p, "%"PRIu64, x); |
| } |
| break; |
| case FDISK_FIELD_END: |
| if (fdisk_partition_has_end(pa)) { |
| x = fdisk_cround(cxt, fdisk_partition_get_end(pa)); |
| rc = pa->end_post ? |
| asprintf(&p, "%"PRIu64"%c", x, pa->end_post) : |
| asprintf(&p, "%"PRIu64, x); |
| } |
| break; |
| case FDISK_FIELD_SIZE: |
| if (fdisk_partition_has_size(pa)) { |
| uint64_t sz = pa->size * cxt->sector_size; |
| |
| switch (cxt->sizeunit) { |
| case FDISK_SIZEUNIT_BYTES: |
| rc = asprintf(&p, "%"PRIu64"", sz); |
| break; |
| case FDISK_SIZEUNIT_HUMAN: |
| if (fdisk_is_details(cxt)) |
| rc = pa->size_post ? |
| asprintf(&p, "%"PRIu64"%c", sz, pa->size_post) : |
| asprintf(&p, "%"PRIu64, sz); |
| else { |
| p = size_to_human_string(SIZE_SUFFIX_1LETTER, sz); |
| if (!p) |
| rc = -ENOMEM; |
| } |
| break; |
| } |
| } |
| break; |
| case FDISK_FIELD_CYLINDERS: |
| { |
| uintmax_t sz = fdisk_partition_has_size(pa) ? pa->size : 0; |
| if (sz) |
| /* Why we need to cast that to uintmax_t? */ |
| rc = asprintf(&p, "%ju", (uintmax_t)(sz / (cxt->geom.heads * cxt->geom.sectors)) + 1); |
| break; |
| } |
| case FDISK_FIELD_SECTORS: |
| rc = asprintf(&p, "%ju", |
| fdisk_partition_has_size(pa) ? (uintmax_t) pa->size : 0); |
| break; |
| case FDISK_FIELD_BSIZE: |
| rc = asprintf(&p, "%"PRIu64, pa->bsize); |
| break; |
| case FDISK_FIELD_FSIZE: |
| rc = asprintf(&p, "%"PRIu64, pa->fsize); |
| break; |
| case FDISK_FIELD_CPG: |
| rc = asprintf(&p, "%"PRIu64, pa->cpg); |
| break; |
| case FDISK_FIELD_TYPE: |
| p = pa->type && pa->type->name ? strdup(_(pa->type->name)) : NULL; |
| break; |
| case FDISK_FIELD_TYPEID: |
| if (pa->type && fdisk_parttype_get_string(pa->type)) |
| rc = asprintf(&p, "%s", fdisk_parttype_get_string(pa->type)); |
| else if (pa->type) |
| rc = asprintf(&p, "%x", fdisk_parttype_get_code(pa->type)); |
| break; |
| case FDISK_FIELD_UUID: |
| p = pa->uuid && *pa->uuid? strdup(pa->uuid) : NULL; |
| break; |
| case FDISK_FIELD_NAME: |
| p = pa->name && *pa->name ? strdup(pa->name) : NULL; |
| break; |
| case FDISK_FIELD_ATTR: |
| p = pa->attrs && *pa->attrs ? strdup(pa->attrs) : NULL; |
| break; |
| case FDISK_FIELD_SADDR: |
| p = pa->start_chs && *pa->start_chs ? strdup(pa->start_chs) : NULL; |
| break; |
| case FDISK_FIELD_EADDR: |
| p = pa->end_chs && *pa->end_chs? strdup(pa->end_chs) : NULL; |
| break; |
| case FDISK_FIELD_FSUUID: |
| if (pa->fs_probed || probe_partition_content(cxt, pa) == 0) |
| p = pa->fsuuid && *pa->fsuuid ? strdup(pa->fsuuid) : NULL; |
| break; |
| case FDISK_FIELD_FSLABEL: |
| if (pa->fs_probed || probe_partition_content(cxt, pa) == 0) |
| p = pa->fslabel && *pa->fslabel ? strdup(pa->fslabel) : NULL; |
| break; |
| case FDISK_FIELD_FSTYPE: |
| if (pa->fs_probed || probe_partition_content(cxt, pa) == 0) |
| p = pa->fstype && *pa->fstype ? strdup(pa->fstype) : NULL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (rc < 0) { |
| rc = -ENOMEM; |
| free(p); |
| p = NULL; |
| |
| } else if (rc > 0) |
| rc = 0; |
| |
| *data = p; |
| |
| return rc; |
| } |
| |
| |
| /** |
| * fdisk_get_partition: |
| * @cxt: context |
| * @partno: partition number (0 is the first partition) |
| * @pa: returns data about partition |
| * |
| * Reads disklabel and fills in @pa with data about partition @n. |
| * |
| * Note that partno may address unused partition and then this function does |
| * not fill anything to @pa. See fdisk_is_partition_used(). If @pa points to |
| * NULL then the function allocates a newly allocated fdisk_partition struct, |
| * use fdisk_unref_partition() to deallocate. |
| * |
| * Returns: 0 on success, otherwise, a corresponding error. |
| */ |
| int fdisk_get_partition(struct fdisk_context *cxt, size_t partno, |
| struct fdisk_partition **pa) |
| { |
| int rc; |
| struct fdisk_partition *np = NULL; |
| |
| if (!cxt || !cxt->label || !pa) |
| return -EINVAL; |
| if (!cxt->label->op->get_part) |
| return -ENOSYS; |
| if (!fdisk_is_partition_used(cxt, partno)) |
| return -EINVAL; |
| |
| if (!*pa) { |
| np = *pa = fdisk_new_partition(); |
| if (!*pa) |
| return -ENOMEM; |
| } else |
| fdisk_reset_partition(*pa); |
| |
| (*pa)->partno = partno; |
| rc = cxt->label->op->get_part(cxt, partno, *pa); |
| |
| if (rc) { |
| if (np) { |
| fdisk_unref_partition(np); |
| *pa = NULL; |
| } else |
| fdisk_reset_partition(*pa); |
| } else |
| (*pa)->size_explicit = 1; |
| return rc; |
| } |
| |
| static struct fdisk_partition *resize_get_by_offset( |
| struct fdisk_table *tb, fdisk_sector_t off) |
| { |
| struct fdisk_partition *pa = NULL; |
| struct fdisk_iter itr; |
| |
| fdisk_reset_iter(&itr, FDISK_ITER_FORWARD); |
| |
| while (fdisk_table_next_partition(tb, &itr, &pa) == 0) { |
| if (!fdisk_partition_has_start(pa) || !fdisk_partition_has_size(pa)) |
| continue; |
| if (off >= pa->start && off < pa->start + pa->size) |
| return pa; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * Verify that area addressed by @start is freespace or the @cur[rent] |
| * partition and continue to the next table entries until it's freespace, and |
| * counts size of all this space. |
| * |
| * This is core of the partition start offset move operation. We can move the |
| * start within the current partition of to the another free space. It's |
| * forbidden to move start of the partition to another already defined |
| * partition. |
| */ |
| static int resize_get_last_possible( |
| struct fdisk_table *tb, |
| struct fdisk_partition *cur, |
| fdisk_sector_t start, |
| fdisk_sector_t *maxsz) |
| { |
| struct fdisk_partition *pa = NULL, *last = NULL; |
| struct fdisk_iter itr; |
| |
| fdisk_reset_iter(&itr, FDISK_ITER_FORWARD); |
| |
| *maxsz = 0; |
| DBG(TAB, ul_debugobj(tb, "checking last possible for start=%ju", (uintmax_t) start)); |
| |
| |
| while (fdisk_table_next_partition(tb, &itr, &pa) == 0) { |
| |
| DBG(TAB, ul_debugobj(tb, " checking entry %p [partno=%zu start=%ju, end=%ju, size=%ju%s%s%s]", |
| pa, |
| fdisk_partition_get_partno(pa), |
| (uintmax_t) fdisk_partition_get_start(pa), |
| (uintmax_t) fdisk_partition_get_end(pa), |
| (uintmax_t) fdisk_partition_get_size(pa), |
| fdisk_partition_is_freespace(pa) ? " freespace" : "", |
| fdisk_partition_is_nested(pa) ? " nested" : "", |
| fdisk_partition_is_container(pa) ? " container" : "")); |
| |
| if (!fdisk_partition_has_start(pa) || |
| !fdisk_partition_has_size(pa) || |
| (fdisk_partition_is_container(pa) && pa != cur)) { |
| DBG(TAB, ul_debugobj(tb, " ignored (no start/size or container)")); |
| continue; |
| } |
| |
| if (fdisk_partition_is_nested(pa) |
| && fdisk_partition_is_container(cur) |
| && pa->parent_partno == cur->partno) { |
| DBG(TAB, ul_debugobj(tb, " ignore (nested child of the current partition)")); |
| continue; |
| } |
| |
| /* The current is nested, free space has to be nested within the same parent */ |
| if (fdisk_partition_is_nested(cur) |
| && pa->parent_partno != cur->parent_partno) { |
| DBG(TAB, ul_debugobj(tb, " ignore (nested required)")); |
| continue; |
| } |
| |
| if (!last) { |
| if (start >= pa->start && start < pa->start + pa->size) { |
| if (fdisk_partition_is_freespace(pa) || pa == cur) { |
| DBG(TAB, ul_debugobj(tb, " accepted as last")); |
| last = pa; |
| } else { |
| DBG(TAB, ul_debugobj(tb, " failed to set last")); |
| break; |
| } |
| |
| |
| *maxsz = pa->size - (start - pa->start); |
| DBG(TAB, ul_debugobj(tb, " new max=%ju", (uintmax_t) *maxsz)); |
| } |
| } else if (!fdisk_partition_is_freespace(pa) && pa != cur) { |
| DBG(TAB, ul_debugobj(tb, " no free space behind current")); |
| break; |
| } else { |
| last = pa; |
| *maxsz += pa->size; |
| DBG(TAB, ul_debugobj(tb, " new max=%ju (last updated)", (uintmax_t) *maxsz)); |
| } |
| } |
| |
| if (last) |
| DBG(PART, ul_debugobj(cur, "resize: max size=%ju", (uintmax_t) *maxsz)); |
| else |
| DBG(PART, ul_debugobj(cur, "resize: nothing usable after %ju", (uintmax_t) start)); |
| |
| return last ? 0 : -1; |
| } |
| |
| /* |
| * Uses template @tpl to recount start and size change of the partition @res. The |
| * @tpl->size and @tpl->start are interpreted as relative to the current setting. |
| */ |
| static int recount_resize( |
| struct fdisk_context *cxt, size_t partno, |
| struct fdisk_partition *res, struct fdisk_partition *tpl) |
| { |
| fdisk_sector_t start, size, xsize; |
| struct fdisk_partition *cur = NULL; |
| struct fdisk_table *tb = NULL; |
| int rc; |
| |
| DBG(PART, ul_debugobj(tpl, ">>> resize requested")); |
| |
| FDISK_INIT_UNDEF(start); |
| FDISK_INIT_UNDEF(size); |
| |
| rc = fdisk_get_partitions(cxt, &tb); |
| if (!rc) |
| rc = fdisk_get_freespaces(cxt, &tb); |
| if (rc) |
| return rc; |
| |
| fdisk_table_sort_partitions(tb, fdisk_partition_cmp_start); |
| |
| DBG(PART, ul_debugobj(tpl, "resize partition partno=%zu in table:", partno)); |
| ON_DBG(PART, fdisk_debug_print_table(tb)); |
| |
| cur = fdisk_table_get_partition_by_partno(tb, partno); |
| if (!cur) { |
| fdisk_unref_table(tb); |
| return -EINVAL; |
| } |
| |
| /* 1a) set new start - change relative to the current on-disk setting */ |
| if (tpl->movestart && fdisk_partition_has_start(tpl)) { |
| start = fdisk_partition_get_start(cur); |
| if (tpl->movestart == FDISK_MOVE_DOWN) { |
| if (fdisk_partition_get_start(tpl) > start) |
| goto erange; |
| start -= fdisk_partition_get_start(tpl); |
| } else |
| start += fdisk_partition_get_start(tpl); |
| |
| DBG(PART, ul_debugobj(tpl, "resize: moving start %s relative, new start: %ju", |
| tpl->movestart == FDISK_MOVE_DOWN ? "DOWN" : "UP", (uintmax_t)start)); |
| |
| /* 1b) set new start - absolute number */ |
| } else if (fdisk_partition_has_start(tpl)) { |
| start = fdisk_partition_get_start(tpl); |
| DBG(PART, ul_debugobj(tpl, "resize: moving start to absolute offset: %ju", |
| (uintmax_t)start)); |
| } |
| |
| /* 2) verify that start is within the current partition or any freespace area */ |
| if (!FDISK_IS_UNDEF(start)) { |
| struct fdisk_partition *area = resize_get_by_offset(tb, start); |
| if (area == cur) |
| DBG(PART, ul_debugobj(tpl, "resize: start points to the current partition")); |
| else if (area && fdisk_partition_is_freespace(area)) |
| DBG(PART, ul_debugobj(tpl, "resize: start points to freespace")); |
| else if (!area && start >= cxt->first_lba && start < cxt->first_lba + (cxt->grain / cxt->sector_size)) |
| DBG(PART, ul_debugobj(tpl, "resize: start points before first partition")); |
| else |
| goto erange; |
| } else { |
| /* no change, start points to the current partition */ |
| DBG(PART, ul_debugobj(tpl, "resize: start unchanged")); |
| start = fdisk_partition_get_start(cur); |
| } |
| |
| /* 3a) set new size -- reduce */ |
| if (tpl->resize == FDISK_RESIZE_REDUCE && fdisk_partition_has_size(tpl)) { |
| DBG(PART, ul_debugobj(tpl, "resize: reduce")); |
| size = fdisk_partition_get_size(cur); |
| if (fdisk_partition_get_size(tpl) > size) |
| goto erange; |
| size -= fdisk_partition_get_size(tpl); |
| |
| /* 3b) set new size -- enlarge */ |
| } else if (tpl->resize == FDISK_RESIZE_ENLARGE && fdisk_partition_has_size(tpl)) { |
| DBG(PART, ul_debugobj(tpl, "resize: enlarge")); |
| size = fdisk_partition_get_size(cur); |
| size += fdisk_partition_get_size(tpl); |
| |
| /* 3c) set new size -- no size specified, enlarge to all freespace */ |
| } else if (tpl->resize == FDISK_RESIZE_ENLARGE) { |
| DBG(PART, ul_debugobj(tpl, "resize: enlarge to all possible")); |
| if (resize_get_last_possible(tb, cur, start, &size)) |
| goto erange; |
| |
| /* 3d) set new size -- absolute number */ |
| } else if (fdisk_partition_has_size(tpl)) { |
| DBG(PART, ul_debugobj(tpl, "resize: new absolute size")); |
| size = fdisk_partition_get_size(tpl); |
| } |
| |
| /* 4) verify that size is within the current partition or next free space */ |
| xsize = !FDISK_IS_UNDEF(size) ? size : fdisk_partition_get_size(cur); |
| |
| if (fdisk_partition_has_size(cur)) { |
| fdisk_sector_t maxsz; |
| |
| if (resize_get_last_possible(tb, cur, start, &maxsz)) |
| goto erange; |
| DBG(PART, ul_debugobj(tpl, "resize: size=%ju, max=%ju", |
| (uintmax_t) xsize, (uintmax_t) maxsz)); |
| if (xsize > maxsz) |
| goto erange; |
| } |
| |
| if (!FDISK_IS_UNDEF(size)) { |
| DBG(PART, ul_debugobj(tpl, "resize: size unchanged (undefined)")); |
| } |
| |
| |
| DBG(PART, ul_debugobj(tpl, "<<< resize: SUCCESS: start %ju->%ju; size %ju->%ju", |
| (uintmax_t) fdisk_partition_get_start(cur), (uintmax_t) start, |
| (uintmax_t) fdisk_partition_get_size(cur), (uintmax_t) size)); |
| res->start = start; |
| res->size = size; |
| fdisk_unref_table(tb); |
| return 0; |
| erange: |
| DBG(PART, ul_debugobj(tpl, "<<< resize: FAILED")); |
| fdisk_warnx(cxt, _("Failed to resize partition #%zu."), partno + 1); |
| fdisk_unref_table(tb); |
| return -ERANGE; |
| |
| } |
| |
| /** |
| * fdisk_set_partition: |
| * @cxt: context |
| * @partno: partition number (0 is the first partition) |
| * @pa: new partition setting |
| * |
| * Modifies disklabel according to setting with in @pa. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_set_partition(struct fdisk_context *cxt, size_t partno, |
| struct fdisk_partition *pa) |
| { |
| struct fdisk_partition *xpa = pa, *tmp = NULL; |
| int rc, wipe = 0; |
| |
| if (!cxt || !cxt->label || !pa) |
| return -EINVAL; |
| if (!cxt->label->op->set_part) |
| return -ENOSYS; |
| |
| pa->fs_probed = 0; |
| |
| if (!fdisk_is_partition_used(cxt, partno)) { |
| pa->partno = partno; |
| return fdisk_add_partition(cxt, pa, NULL); |
| } |
| |
| if (pa->resize || fdisk_partition_has_start(pa) || fdisk_partition_has_size(pa)) { |
| xpa = __copy_partition(pa); |
| if (!xpa) { |
| rc = -ENOMEM; |
| goto done; |
| } |
| xpa->movestart = 0; |
| xpa->resize = 0; |
| FDISK_INIT_UNDEF(xpa->size); |
| FDISK_INIT_UNDEF(xpa->start); |
| |
| rc = recount_resize(cxt, partno, xpa, pa); |
| if (rc) |
| goto done; |
| } |
| |
| DBG(CXT, ul_debugobj(cxt, "setting partition %zu %p (start=%ju, end=%ju, size=%ju)", |
| partno, xpa, |
| (uintmax_t) fdisk_partition_get_start(xpa), |
| (uintmax_t) fdisk_partition_get_end(xpa), |
| (uintmax_t) fdisk_partition_get_size(xpa))); |
| |
| /* disable wipe for old offset/size setting */ |
| if (fdisk_get_partition(cxt, partno, &tmp) == 0 && tmp) { |
| wipe = fdisk_set_wipe_area(cxt, fdisk_partition_get_start(tmp), |
| fdisk_partition_get_size(tmp), FALSE); |
| fdisk_unref_partition(tmp); |
| } |
| |
| /* call label driver */ |
| rc = cxt->label->op->set_part(cxt, partno, xpa); |
| |
| /* enable wipe for new offset/size */ |
| if (!rc && wipe) |
| fdisk_wipe_partition(cxt, partno, TRUE); |
| done: |
| DBG(CXT, ul_debugobj(cxt, "set_partition() rc=%d", rc)); |
| if (xpa != pa) |
| fdisk_unref_partition(xpa); |
| return rc; |
| } |
| |
| /** |
| * fdisk_wipe_partition: |
| * @cxt: fdisk context |
| * @partno: partition number |
| * @enable: 0 or 1 |
| * |
| * Enable/disable filesystems/RAIDs wiping in area defined by partition start and size. |
| * |
| * Returns: <0 in case of error, 0 on success |
| * Since: 2.29 |
| */ |
| int fdisk_wipe_partition(struct fdisk_context *cxt, size_t partno, int enable) |
| { |
| struct fdisk_partition *pa = NULL; |
| int rc; |
| |
| rc = fdisk_get_partition(cxt, partno, &pa); |
| if (rc) |
| return rc; |
| |
| rc = fdisk_set_wipe_area(cxt, fdisk_partition_get_start(pa), |
| fdisk_partition_get_size(pa), enable); |
| fdisk_unref_partition(pa); |
| return rc < 0 ? rc : 0; |
| } |
| |
| /** |
| * fdisk_partition_has_wipe: |
| * @cxt: fdisk context |
| * @pa: partition |
| * |
| * Since: 2.30 |
| * |
| * Returns: 1 if the area specified by @pa will be wiped by write command, or 0. |
| */ |
| int fdisk_partition_has_wipe(struct fdisk_context *cxt, struct fdisk_partition *pa) |
| { |
| return fdisk_has_wipe_area(cxt, fdisk_partition_get_start(pa), |
| fdisk_partition_get_size(pa)); |
| } |
| |
| |
| /** |
| * fdisk_add_partition: |
| * @cxt: fdisk context |
| * @pa: template for the partition (or NULL) |
| * @partno: NULL or returns new partition number |
| * |
| * If @pa is not specified or any @pa item is missing the libfdisk will ask by |
| * fdisk_ask_ API. |
| * |
| * The @pa template is is important for non-interactive partitioning, |
| * especially for MBR where is necessary to differentiate between |
| * primary/logical; this is done by start offset or/and partno. |
| * The rules for MBR: |
| * |
| * A) template specifies start within extended partition: add logical |
| * B) template specifies start out of extended partition: add primary |
| * C) template specifies start (or default), partno < 4: add primary |
| * D) template specifies default start, partno >= 4: add logical |
| * |
| * otherwise MBR driver uses Ask-API to get missing information. |
| * |
| * Adds a new partition to disklabel. |
| * |
| * Returns: 0 on success, <0 on error. |
| */ |
| int fdisk_add_partition(struct fdisk_context *cxt, |
| struct fdisk_partition *pa, |
| size_t *partno) |
| { |
| int rc; |
| |
| if (!cxt || !cxt->label) |
| return -EINVAL; |
| if (!cxt->label->op->add_part) |
| return -ENOSYS; |
| if (fdisk_missing_geometry(cxt)) |
| return -EINVAL; |
| |
| if (pa) { |
| pa->fs_probed = 0; |
| DBG(CXT, ul_debugobj(cxt, "adding new partition %p", pa)); |
| if (fdisk_partition_has_start(pa)) |
| DBG(CXT, ul_debugobj(cxt, " start: %ju", (uintmax_t) fdisk_partition_get_start(pa))); |
| if (fdisk_partition_has_end(pa)) |
| DBG(CXT, ul_debugobj(cxt, " end: %ju", (uintmax_t) fdisk_partition_get_end(pa))); |
| if (fdisk_partition_has_size(pa)) |
| DBG(CXT, ul_debugobj(cxt, " size: %ju", (uintmax_t) fdisk_partition_get_size(pa))); |
| |
| DBG(CXT, ul_debugobj(cxt, " defaults: start=%s, end=%s, partno=%s", |
| pa->start_follow_default ? "yes" : "no", |
| pa->end_follow_default ? "yes" : "no", |
| pa->partno_follow_default ? "yes" : "no")); |
| } else |
| DBG(CXT, ul_debugobj(cxt, "adding partition")); |
| |
| rc = cxt->label->op->add_part(cxt, pa, partno); |
| |
| DBG(CXT, ul_debugobj(cxt, "add partition done (rc=%d)", rc)); |
| return rc; |
| } |
| |
| /** |
| * fdisk_delete_partition: |
| * @cxt: fdisk context |
| * @partno: partition number to delete (0 is the first partition) |
| * |
| * Deletes a @partno partition from disklabel. |
| * |
| * Returns: 0 on success, <0 on error |
| */ |
| int fdisk_delete_partition(struct fdisk_context *cxt, size_t partno) |
| { |
| if (!cxt || !cxt->label) |
| return -EINVAL; |
| if (!cxt->label->op->del_part) |
| return -ENOSYS; |
| |
| fdisk_wipe_partition(cxt, partno, 0); |
| |
| DBG(CXT, ul_debugobj(cxt, "deleting %s partition number %zd", |
| cxt->label->name, partno)); |
| return cxt->label->op->del_part(cxt, partno); |
| } |
| |
| /** |
| * fdisk_delete_all_partitions: |
| * @cxt: fdisk context |
| * |
| * Delete all used partitions from disklabel. |
| * |
| * Returns: 0 on success, otherwise, a corresponding error. |
| */ |
| int fdisk_delete_all_partitions(struct fdisk_context *cxt) |
| { |
| size_t i; |
| int rc = 0; |
| |
| if (!cxt || !cxt->label) |
| return -EINVAL; |
| |
| for (i = 0; i < cxt->label->nparts_max; i++) { |
| |
| if (!fdisk_is_partition_used(cxt, i)) |
| continue; |
| rc = fdisk_delete_partition(cxt, i); |
| if (rc) |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /** |
| * fdisk_is_partition_used: |
| * @cxt: context |
| * @n: partition number (0 is the first partition) |
| * |
| * Check if the partition number @n is used by partition table. This function |
| * does not check if the device is used (e.g. mounted) by system! |
| * |
| * This is faster than fdisk_get_partition() + fdisk_partition_is_used(). |
| * |
| * Returns: 0 or 1 |
| */ |
| int fdisk_is_partition_used(struct fdisk_context *cxt, size_t n) |
| { |
| if (!cxt || !cxt->label) |
| return -EINVAL; |
| if (!cxt->label->op->part_is_used) |
| return -ENOSYS; |
| |
| return cxt->label->op->part_is_used(cxt, n); |
| } |
| |