1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 #if HAVE_VALGRIND_MEMCHECK_H
4 #include <valgrind/memcheck.h>
10 #include <linux/loop.h>
12 #include <sys/ioctl.h>
17 #include "alloc-util.h"
18 #include "blkid-util.h"
19 #include "blockdev-util.h"
20 #include "btrfs-util.h"
21 #include "chase-symlinks.h"
22 #include "conf-files.h"
23 #include "conf-parser.h"
24 #include "cryptsetup-util.h"
26 #include "dirent-util.h"
28 #include "errno-util.h"
30 #include "fdisk-util.h"
32 #include "format-table.h"
33 #include "format-util.h"
35 #include "glyph-util.h"
37 #include "hexdecoct.h"
39 #include "id128-util.h"
42 #include "loop-util.h"
43 #include "main-func.h"
45 #include "mkfs-util.h"
46 #include "mount-util.h"
47 #include "mountpoint-util.h"
48 #include "parse-argument.h"
49 #include "parse-util.h"
50 #include "path-util.h"
51 #include "pretty-print.h"
52 #include "proc-cmdline.h"
53 #include "process-util.h"
54 #include "random-util.h"
55 #include "resize-fs.h"
56 #include "sort-util.h"
57 #include "specifier.h"
58 #include "stat-util.h"
59 #include "stdio-util.h"
60 #include "string-table.h"
61 #include "string-util.h"
63 #include "sync-util.h"
64 #include "terminal-util.h"
65 #include "tpm2-util.h"
66 #include "user-util.h"
69 /* If not configured otherwise use a minimal partition size of 10M */
70 #define DEFAULT_MIN_SIZE (10*1024*1024)
72 /* Hard lower limit for new partition sizes */
73 #define HARD_MIN_SIZE 4096
75 /* libfdisk takes off slightly more than 1M of the disk size when creating a GPT disk label */
76 #define GPT_METADATA_SIZE (1044*1024)
78 /* LUKS2 takes off 16M of the partition size with its metadata by default */
79 #define LUKS2_METADATA_SIZE (16*1024*1024)
81 /* Note: When growing and placing new partitions we always align to 4K sector size. It's how newer hard disks
82 * are designed, and if everything is aligned to that performance is best. And for older hard disks with 512B
83 * sector size devices were generally assumed to have an even number of sectors, hence at the worst we'll
84 * waste 3K per partition, which is probably fine. */
87 EMPTY_REFUSE
, /* refuse empty disks, never create a partition table */
88 EMPTY_ALLOW
, /* allow empty disks, create partition table if necessary */
89 EMPTY_REQUIRE
, /* require an empty disk, create a partition table */
90 EMPTY_FORCE
, /* make disk empty, erase everything, create a partition table always */
91 EMPTY_CREATE
, /* create disk as loopback file, create a partition table always */
92 } arg_empty
= EMPTY_REFUSE
;
94 static bool arg_dry_run
= true;
95 static const char *arg_node
= NULL
;
96 static char *arg_root
= NULL
;
97 static char *arg_image
= NULL
;
98 static char *arg_definitions
= NULL
;
99 static bool arg_discard
= true;
100 static bool arg_can_factory_reset
= false;
101 static int arg_factory_reset
= -1;
102 static sd_id128_t arg_seed
= SD_ID128_NULL
;
103 static bool arg_randomize
= false;
104 static int arg_pretty
= -1;
105 static uint64_t arg_size
= UINT64_MAX
;
106 static bool arg_size_auto
= false;
107 static JsonFormatFlags arg_json_format_flags
= JSON_FORMAT_OFF
;
108 static PagerFlags arg_pager_flags
= 0;
109 static bool arg_legend
= true;
110 static void *arg_key
= NULL
;
111 static size_t arg_key_size
= 0;
112 static char *arg_tpm2_device
= NULL
;
113 static uint32_t arg_tpm2_pcr_mask
= UINT32_MAX
;
115 STATIC_DESTRUCTOR_REGISTER(arg_root
, freep
);
116 STATIC_DESTRUCTOR_REGISTER(arg_image
, freep
);
117 STATIC_DESTRUCTOR_REGISTER(arg_definitions
, freep
);
118 STATIC_DESTRUCTOR_REGISTER(arg_key
, erase_and_freep
);
119 STATIC_DESTRUCTOR_REGISTER(arg_tpm2_device
, freep
);
121 typedef struct Partition Partition
;
122 typedef struct FreeArea FreeArea
;
123 typedef struct Context Context
;
125 typedef enum EncryptMode
{
129 ENCRYPT_KEY_FILE_TPM2
,
131 _ENCRYPT_MODE_INVALID
= -EINVAL
,
135 char *definition_path
;
137 sd_id128_t type_uuid
;
138 sd_id128_t current_uuid
, new_uuid
;
139 char *current_label
, *new_label
;
145 uint32_t weight
, padding_weight
;
147 uint64_t current_size
, new_size
;
148 uint64_t size_min
, size_max
;
150 uint64_t current_padding
, new_padding
;
151 uint64_t padding_min
, padding_max
;
156 struct fdisk_partition
*current_partition
;
157 struct fdisk_partition
*new_partition
;
158 FreeArea
*padding_area
;
159 FreeArea
*allocated_to_area
;
161 char *copy_blocks_path
;
162 bool copy_blocks_auto
;
164 uint64_t copy_blocks_size
;
168 char **make_directories
;
176 LIST_FIELDS(Partition
, partitions
);
179 #define PARTITION_IS_FOREIGN(p) (!(p)->definition_path)
180 #define PARTITION_EXISTS(p) (!!(p)->current_partition)
189 LIST_HEAD(Partition
, partitions
);
192 FreeArea
**free_areas
;
195 uint64_t start
, end
, total
;
197 struct fdisk_context
*fdisk_context
;
198 uint64_t sector_size
;
204 static const char *encrypt_mode_table
[_ENCRYPT_MODE_MAX
] = {
205 [ENCRYPT_OFF
] = "off",
206 [ENCRYPT_KEY_FILE
] = "key-file",
207 [ENCRYPT_TPM2
] = "tpm2",
208 [ENCRYPT_KEY_FILE_TPM2
] = "key-file+tpm2",
211 #if HAVE_LIBCRYPTSETUP
212 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(encrypt_mode
, EncryptMode
, ENCRYPT_KEY_FILE
);
214 DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING_WITH_BOOLEAN(encrypt_mode
, EncryptMode
, ENCRYPT_KEY_FILE
);
218 static uint64_t round_down_size(uint64_t v
, uint64_t p
) {
222 static uint64_t round_up_size(uint64_t v
, uint64_t p
) {
224 v
= DIV_ROUND_UP(v
, p
);
226 if (v
> UINT64_MAX
/ p
)
227 return UINT64_MAX
; /* overflow */
232 static Partition
*partition_new(void) {
235 p
= new(Partition
, 1);
242 .current_size
= UINT64_MAX
,
243 .new_size
= UINT64_MAX
,
244 .size_min
= UINT64_MAX
,
245 .size_max
= UINT64_MAX
,
246 .current_padding
= UINT64_MAX
,
247 .new_padding
= UINT64_MAX
,
248 .padding_min
= UINT64_MAX
,
249 .padding_max
= UINT64_MAX
,
250 .partno
= UINT64_MAX
,
251 .offset
= UINT64_MAX
,
252 .copy_blocks_fd
= -1,
253 .copy_blocks_size
= UINT64_MAX
,
262 static Partition
* partition_free(Partition
*p
) {
266 free(p
->current_label
);
268 free(p
->definition_path
);
270 if (p
->current_partition
)
271 fdisk_unref_partition(p
->current_partition
);
272 if (p
->new_partition
)
273 fdisk_unref_partition(p
->new_partition
);
275 free(p
->copy_blocks_path
);
276 safe_close(p
->copy_blocks_fd
);
279 strv_free(p
->copy_files
);
280 strv_free(p
->make_directories
);
285 static Partition
* partition_unlink_and_free(Context
*context
, Partition
*p
) {
289 LIST_REMOVE(partitions
, context
->partitions
, p
);
291 assert(context
->n_partitions
> 0);
292 context
->n_partitions
--;
294 return partition_free(p
);
297 DEFINE_TRIVIAL_CLEANUP_FUNC(Partition
*, partition_free
);
299 static Context
*context_new(sd_id128_t seed
) {
302 context
= new(Context
, 1);
306 *context
= (Context
) {
316 static void context_free_free_areas(Context
*context
) {
319 for (size_t i
= 0; i
< context
->n_free_areas
; i
++)
320 free(context
->free_areas
[i
]);
322 context
->free_areas
= mfree(context
->free_areas
);
323 context
->n_free_areas
= 0;
326 static Context
*context_free(Context
*context
) {
330 while (context
->partitions
)
331 partition_unlink_and_free(context
, context
->partitions
);
332 assert(context
->n_partitions
== 0);
334 context_free_free_areas(context
);
336 if (context
->fdisk_context
)
337 fdisk_unref_context(context
->fdisk_context
);
339 return mfree(context
);
342 DEFINE_TRIVIAL_CLEANUP_FUNC(Context
*, context_free
);
344 static int context_add_free_area(
352 assert(!after
|| !after
->padding_area
);
354 if (!GREEDY_REALLOC(context
->free_areas
, context
->n_free_areas
+ 1))
357 a
= new(FreeArea
, 1);
366 context
->free_areas
[context
->n_free_areas
++] = a
;
369 after
->padding_area
= a
;
374 static bool context_drop_one_priority(Context
*context
) {
375 int32_t priority
= 0;
378 LIST_FOREACH(partitions
, p
, context
->partitions
) {
381 if (p
->priority
< priority
)
383 if (p
->priority
== priority
) {
384 exists
= exists
|| PARTITION_EXISTS(p
);
388 priority
= p
->priority
;
389 exists
= PARTITION_EXISTS(p
);
392 /* Refuse to drop partitions with 0 or negative priorities or partitions of priorities that have at
393 * least one existing priority */
394 if (priority
<= 0 || exists
)
397 LIST_FOREACH(partitions
, p
, context
->partitions
) {
398 if (p
->priority
< priority
)
405 log_info("Can't fit partition %s of priority %" PRIi32
", dropping.", p
->definition_path
, p
->priority
);
411 static uint64_t partition_min_size(Context
*context
, const Partition
*p
) {
417 /* Calculate the disk space we really need at minimum for this partition. If the partition already
418 * exists the current size is what we really need. If it doesn't exist yet refuse to allocate less
421 * DEFAULT_MIN_SIZE is the default SizeMin= we configure if nothing else is specified. */
423 if (PARTITION_IS_FOREIGN(p
)) {
424 /* Don't allow changing size of partitions not managed by us */
425 assert(p
->current_size
!= UINT64_MAX
);
426 return p
->current_size
;
429 sz
= p
->current_size
!= UINT64_MAX
? p
->current_size
: HARD_MIN_SIZE
;
431 if (!PARTITION_EXISTS(p
)) {
434 if (p
->encrypt
!= ENCRYPT_OFF
)
435 d
+= round_up_size(LUKS2_METADATA_SIZE
, context
->grain_size
);
437 if (p
->copy_blocks_size
!= UINT64_MAX
)
438 d
+= round_up_size(p
->copy_blocks_size
, context
->grain_size
);
439 else if (p
->format
|| p
->encrypt
!= ENCRYPT_OFF
) {
442 /* If we shall synthesize a file system, take minimal fs size into account (assumed to be 4K if not known) */
443 f
= p
->format
? round_up_size(minimal_size_by_fs_name(p
->format
), context
->grain_size
) : UINT64_MAX
;
444 d
+= f
== UINT64_MAX
? context
->grain_size
: f
;
451 return MAX(round_up_size(p
->size_min
!= UINT64_MAX
? p
->size_min
: DEFAULT_MIN_SIZE
, context
->grain_size
), sz
);
454 static uint64_t partition_max_size(const Context
*context
, const Partition
*p
) {
457 /* Calculate how large the partition may become at max. This is generally the configured maximum
458 * size, except when it already exists and is larger than that. In that case it's the existing size,
459 * since we never want to shrink partitions. */
464 if (PARTITION_IS_FOREIGN(p
)) {
465 /* Don't allow changing size of partitions not managed by us */
466 assert(p
->current_size
!= UINT64_MAX
);
467 return p
->current_size
;
470 sm
= round_down_size(p
->size_max
, context
->grain_size
);
472 if (p
->current_size
!= UINT64_MAX
)
473 return MAX(p
->current_size
, sm
);
478 static uint64_t partition_min_size_with_padding(Context
*context
, const Partition
*p
) {
481 /* Calculate the disk space we need for this partition plus any free space coming after it. This
482 * takes user configured padding into account as well as any additional whitespace needed to align
483 * the next partition to 4K again. */
488 sz
= partition_min_size(context
, p
);
490 if (p
->padding_min
!= UINT64_MAX
)
491 sz
+= p
->padding_min
;
493 if (PARTITION_EXISTS(p
)) {
494 /* If the partition wasn't aligned, add extra space so that any we might add will be aligned */
495 assert(p
->offset
!= UINT64_MAX
);
496 return round_up_size(p
->offset
+ sz
, context
->grain_size
) - p
->offset
;
499 /* If this is a new partition we'll place it aligned, hence we just need to round up the required size here */
500 return round_up_size(sz
, context
->grain_size
);
503 static uint64_t free_area_available(const FreeArea
*a
) {
506 /* Determines how much of this free area is not allocated yet */
508 assert(a
->size
>= a
->allocated
);
509 return a
->size
- a
->allocated
;
512 static uint64_t free_area_available_for_new_partitions(Context
*context
, const FreeArea
*a
) {
518 /* Similar to free_area_available(), but takes into account that the required size and padding of the
519 * preceding partition is honoured. */
521 avail
= free_area_available(a
);
523 uint64_t need
, space_end
, new_end
;
525 need
= partition_min_size_with_padding(context
, a
->after
);
527 assert(a
->after
->offset
!= UINT64_MAX
);
528 assert(a
->after
->current_size
!= UINT64_MAX
);
530 /* Calculate where the free area ends, based on the offset of the partition preceding it */
531 space_end
= round_up_size(a
->after
->offset
+ a
->after
->current_size
, context
->grain_size
) + avail
;
533 /* Calculate where the partition would end when we give it as much as it needs */
534 new_end
= round_up_size(a
->after
->offset
+ need
, context
->grain_size
);
536 /* Calculate saturated difference of the two: that's how much we have free for other partitions */
537 return LESS_BY(space_end
, new_end
);
543 static int free_area_compare(FreeArea
*const *a
, FreeArea
*const*b
, Context
*context
) {
546 return CMP(free_area_available_for_new_partitions(context
, *a
),
547 free_area_available_for_new_partitions(context
, *b
));
550 static uint64_t charge_size(Context
*context
, uint64_t total
, uint64_t amount
) {
552 /* Subtract the specified amount from total, rounding up to multiple of 4K if there's room */
553 assert(amount
<= total
);
554 return LESS_BY(total
, round_up_size(amount
, context
->grain_size
));
557 static uint64_t charge_weight(uint64_t total
, uint64_t amount
) {
558 assert(amount
<= total
);
559 return total
- amount
;
562 static bool context_allocate_partitions(Context
*context
, uint64_t *ret_largest_free_area
) {
565 /* Sort free areas by size, putting smallest first */
566 typesafe_qsort_r(context
->free_areas
, context
->n_free_areas
, free_area_compare
, context
);
568 /* In any case return size of the largest free area (i.e. not the size of all free areas
570 if (ret_largest_free_area
)
571 *ret_largest_free_area
=
572 context
->n_free_areas
== 0 ? 0 :
573 free_area_available_for_new_partitions(context
, context
->free_areas
[context
->n_free_areas
-1]);
575 /* A simple first-fit algorithm. We return true if we can fit the partitions in, otherwise false. */
576 LIST_FOREACH(partitions
, p
, context
->partitions
) {
581 /* Skip partitions we already dropped or that already exist */
582 if (p
->dropped
|| PARTITION_EXISTS(p
))
585 /* How much do we need to fit? */
586 required
= partition_min_size_with_padding(context
, p
);
587 assert(required
% context
->grain_size
== 0);
589 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
590 a
= context
->free_areas
[i
];
592 if (free_area_available_for_new_partitions(context
, a
) >= required
) {
599 return false; /* 😢 Oh no! We can't fit this partition into any free area! */
601 /* Assign the partition to this free area */
602 p
->allocated_to_area
= a
;
604 /* Budget the minimal partition size */
605 a
->allocated
+= required
;
611 static int context_sum_weights(Context
*context
, FreeArea
*a
, uint64_t *ret
) {
612 uint64_t weight_sum
= 0;
618 /* Determine the sum of the weights of all partitions placed in or before the specified free area */
620 LIST_FOREACH(partitions
, p
, context
->partitions
) {
621 if (p
->padding_area
!= a
&& p
->allocated_to_area
!= a
)
624 if (p
->weight
> UINT64_MAX
- weight_sum
)
626 weight_sum
+= p
->weight
;
628 if (p
->padding_weight
> UINT64_MAX
- weight_sum
)
630 weight_sum
+= p
->padding_weight
;
637 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Combined weight of partition exceeds unsigned 64bit range, refusing.");
640 static int scale_by_weight(uint64_t value
, uint64_t weight
, uint64_t weight_sum
, uint64_t *ret
) {
641 assert(weight_sum
>= weight
);
649 if (value
> UINT64_MAX
/ weight
)
650 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Scaling by weight of partition exceeds unsigned 64bit range, refusing.");
652 *ret
= value
* weight
/ weight_sum
;
656 typedef enum GrowPartitionPhase
{
657 /* The first phase: we charge partitions which need more (according to constraints) than their weight-based share. */
660 /* The second phase: we charge partitions which need less (according to constraints) than their weight-based share. */
663 /* The third phase: we distribute what remains among the remaining partitions, according to the weights */
666 _GROW_PARTITION_PHASE_MAX
,
667 } GrowPartitionPhase
;
669 static int context_grow_partitions_phase(
672 GrowPartitionPhase phase
,
674 uint64_t *weight_sum
) {
681 /* Now let's look at the intended weights and adjust them taking the minimum space assignments into
682 * account. i.e. if a partition has a small weight but a high minimum space value set it should not
683 * get any additional room from the left-overs. Similar, if two partitions have the same weight they
684 * should get the same space if possible, even if one has a smaller minimum size than the other. */
685 LIST_FOREACH(partitions
, p
, context
->partitions
) {
687 /* Look only at partitions associated with this free area, i.e. immediately
688 * preceding it, or allocated into it */
689 if (p
->allocated_to_area
!= a
&& p
->padding_area
!= a
)
692 if (p
->new_size
== UINT64_MAX
) {
693 bool charge
= false, try_again
= false;
694 uint64_t share
, rsz
, xsz
;
696 /* Calculate how much this space this partition needs if everyone would get
697 * the weight based share */
698 r
= scale_by_weight(*span
, p
->weight
, *weight_sum
, &share
);
702 rsz
= partition_min_size(context
, p
);
703 xsz
= partition_max_size(context
, p
);
705 if (phase
== PHASE_OVERCHARGE
&& rsz
> share
) {
706 /* This partition needs more than its calculated share. Let's assign
707 * it that, and take this partition out of all calculations and start
711 charge
= try_again
= true;
713 } else if (phase
== PHASE_UNDERCHARGE
&& xsz
!= UINT64_MAX
&& xsz
< share
) {
714 /* This partition accepts less than its calculated
715 * share. Let's assign it that, and take this partition out
716 * of all calculations and start again. */
719 charge
= try_again
= true;
721 } else if (phase
== PHASE_DISTRIBUTE
) {
722 /* This partition can accept its calculated share. Let's
723 * assign it. There's no need to restart things here since
724 * assigning this shouldn't impact the shares of the other
727 if (PARTITION_IS_FOREIGN(p
))
728 /* Never change of foreign partitions (i.e. those we don't manage) */
729 p
->new_size
= p
->current_size
;
731 p
->new_size
= MAX(round_down_size(share
, context
->grain_size
), rsz
);
737 *span
= charge_size(context
, *span
, p
->new_size
);
738 *weight_sum
= charge_weight(*weight_sum
, p
->weight
);
742 return 0; /* try again */
745 if (p
->new_padding
== UINT64_MAX
) {
746 bool charge
= false, try_again
= false;
749 r
= scale_by_weight(*span
, p
->padding_weight
, *weight_sum
, &share
);
753 if (phase
== PHASE_OVERCHARGE
&& p
->padding_min
!= UINT64_MAX
&& p
->padding_min
> share
) {
754 p
->new_padding
= p
->padding_min
;
755 charge
= try_again
= true;
756 } else if (phase
== PHASE_UNDERCHARGE
&& p
->padding_max
!= UINT64_MAX
&& p
->padding_max
< share
) {
757 p
->new_padding
= p
->padding_max
;
758 charge
= try_again
= true;
759 } else if (phase
== PHASE_DISTRIBUTE
) {
761 p
->new_padding
= round_down_size(share
, context
->grain_size
);
762 if (p
->padding_min
!= UINT64_MAX
&& p
->new_padding
< p
->padding_min
)
763 p
->new_padding
= p
->padding_min
;
769 *span
= charge_size(context
, *span
, p
->new_padding
);
770 *weight_sum
= charge_weight(*weight_sum
, p
->padding_weight
);
774 return 0; /* try again */
781 static int context_grow_partitions_on_free_area(Context
*context
, FreeArea
*a
) {
782 uint64_t weight_sum
= 0, span
;
788 r
= context_sum_weights(context
, a
, &weight_sum
);
792 /* Let's calculate the total area covered by this free area and the partition before it */
795 assert(a
->after
->offset
!= UINT64_MAX
);
796 assert(a
->after
->current_size
!= UINT64_MAX
);
798 span
+= round_up_size(a
->after
->offset
+ a
->after
->current_size
, context
->grain_size
) - a
->after
->offset
;
801 for (GrowPartitionPhase phase
= 0; phase
< _GROW_PARTITION_PHASE_MAX
;) {
802 r
= context_grow_partitions_phase(context
, a
, phase
, &span
, &weight_sum
);
805 if (r
== 0) /* not done yet, re-run this phase */
808 phase
++; /* got to next phase */
811 /* We still have space left over? Donate to preceding partition if we have one */
812 if (span
> 0 && a
->after
&& !PARTITION_IS_FOREIGN(a
->after
)) {
815 assert(a
->after
->new_size
!= UINT64_MAX
);
817 /* Calculate new size and align (but ensure this doesn't shrink the size) */
818 m
= MAX(a
->after
->new_size
, round_down_size(a
->after
->new_size
+ span
, context
->grain_size
));
820 xsz
= partition_max_size(context
, a
->after
);
821 if (xsz
!= UINT64_MAX
&& m
> xsz
)
824 span
= charge_size(context
, span
, m
- a
->after
->new_size
);
825 a
->after
->new_size
= m
;
828 /* What? Even still some space left (maybe because there was no preceding partition, or it had a
829 * size limit), then let's donate it to whoever wants it. */
831 LIST_FOREACH(partitions
, p
, context
->partitions
) {
834 if (p
->allocated_to_area
!= a
)
837 if (PARTITION_IS_FOREIGN(p
))
840 assert(p
->new_size
!= UINT64_MAX
);
841 m
= MAX(p
->new_size
, round_down_size(p
->new_size
+ span
, context
->grain_size
));
843 xsz
= partition_max_size(context
, p
);
844 if (xsz
!= UINT64_MAX
&& m
> xsz
)
847 span
= charge_size(context
, span
, m
- p
->new_size
);
854 /* Yuck, still no one? Then make it padding */
855 if (span
> 0 && a
->after
) {
856 assert(a
->after
->new_padding
!= UINT64_MAX
);
857 a
->after
->new_padding
+= span
;
863 static int context_grow_partitions(Context
*context
) {
868 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
869 r
= context_grow_partitions_on_free_area(context
, context
->free_areas
[i
]);
874 /* All existing partitions that have no free space after them can't change size */
875 LIST_FOREACH(partitions
, p
, context
->partitions
) {
879 if (!PARTITION_EXISTS(p
) || p
->padding_area
) {
880 /* The algorithm above must have initialized this already */
881 assert(p
->new_size
!= UINT64_MAX
);
885 assert(p
->new_size
== UINT64_MAX
);
886 p
->new_size
= p
->current_size
;
888 assert(p
->new_padding
== UINT64_MAX
);
889 p
->new_padding
= p
->current_padding
;
895 static void context_place_partitions(Context
*context
) {
900 /* Determine next partition number to assign */
901 LIST_FOREACH(partitions
, p
, context
->partitions
) {
902 if (!PARTITION_EXISTS(p
))
905 assert(p
->partno
!= UINT64_MAX
);
906 if (p
->partno
>= partno
)
907 partno
= p
->partno
+ 1;
910 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
911 FreeArea
*a
= context
->free_areas
[i
];
912 _unused_
uint64_t left
;
916 assert(a
->after
->offset
!= UINT64_MAX
);
917 assert(a
->after
->new_size
!= UINT64_MAX
);
918 assert(a
->after
->new_padding
!= UINT64_MAX
);
920 start
= a
->after
->offset
+ a
->after
->new_size
+ a
->after
->new_padding
;
922 start
= context
->start
;
924 start
= round_up_size(start
, context
->grain_size
);
927 LIST_FOREACH(partitions
, p
, context
->partitions
) {
928 if (p
->allocated_to_area
!= a
)
932 p
->partno
= partno
++;
934 assert(left
>= p
->new_size
);
935 start
+= p
->new_size
;
938 assert(left
>= p
->new_padding
);
939 start
+= p
->new_padding
;
940 left
-= p
->new_padding
;
945 static int config_parse_type(
947 const char *filename
,
950 unsigned section_line
,
957 sd_id128_t
*type_uuid
= data
;
963 r
= gpt_partition_type_uuid_from_string(rvalue
, type_uuid
);
965 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse partition type: %s", rvalue
);
970 static int config_parse_label(
972 const char *filename
,
975 unsigned section_line
,
982 _cleanup_free_
char *resolved
= NULL
;
989 /* Nota bene: the empty label is a totally valid one. Let's hence not follow our usual rule of
990 * assigning the empty string to reset to default here, but really accept it as label to set. */
992 r
= specifier_printf(rvalue
, GPT_LABEL_MAX
, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved
);
994 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
995 "Failed to expand specifiers in Label=, ignoring: %s", rvalue
);
999 if (!utf8_is_valid(resolved
)) {
1000 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
1001 "Partition label not valid UTF-8, ignoring: %s", rvalue
);
1005 r
= gpt_partition_label_valid(resolved
);
1007 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1008 "Failed to check if string is valid as GPT partition label, ignoring: \"%s\" (from \"%s\")",
1013 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
1014 "Partition label too long for GPT table, ignoring: \"%s\" (from \"%s\")",
1019 free_and_replace(*label
, resolved
);
1023 static int config_parse_weight(
1025 const char *filename
,
1027 const char *section
,
1028 unsigned section_line
,
1035 uint32_t *priority
= data
, v
;
1041 r
= safe_atou32(rvalue
, &v
);
1043 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1044 "Failed to parse weight value, ignoring: %s", rvalue
);
1048 if (v
> 1000U*1000U) {
1049 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
1050 "Weight needs to be in range 0…10000000, ignoring: %" PRIu32
, v
);
1058 static int config_parse_size4096(
1060 const char *filename
,
1062 const char *section
,
1063 unsigned section_line
,
1070 uint64_t *sz
= data
, parsed
;
1076 r
= parse_size(rvalue
, 1024, &parsed
);
1078 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
,
1079 "Failed to parse size value: %s", rvalue
);
1082 *sz
= round_up_size(parsed
, 4096);
1084 *sz
= round_down_size(parsed
, 4096);
1089 log_syntax(unit
, LOG_NOTICE
, filename
, line
, r
, "Rounded %s= size %" PRIu64
" → %" PRIu64
", a multiple of 4096.", lvalue
, parsed
, *sz
);
1094 static int config_parse_fstype(
1096 const char *filename
,
1098 const char *section
,
1099 unsigned section_line
,
1106 char **fstype
= data
;
1111 if (!filename_is_valid(rvalue
))
1112 return log_syntax(unit
, LOG_ERR
, filename
, line
, 0,
1113 "File system type is not valid, refusing: %s", rvalue
);
1115 return free_and_strdup_warn(fstype
, rvalue
);
1118 static int config_parse_copy_files(
1120 const char *filename
,
1122 const char *section
,
1123 unsigned section_line
,
1130 _cleanup_free_
char *source
= NULL
, *buffer
= NULL
, *resolved_source
= NULL
, *resolved_target
= NULL
;
1131 const char *p
= rvalue
, *target
;
1132 Partition
*partition
= data
;
1138 r
= extract_first_word(&p
, &source
, ":", EXTRACT_CUNESCAPE
|EXTRACT_DONT_COALESCE_SEPARATORS
);
1140 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to extract source path: %s", rvalue
);
1142 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "No argument specified: %s", rvalue
);
1146 r
= extract_first_word(&p
, &buffer
, ":", EXTRACT_CUNESCAPE
|EXTRACT_DONT_COALESCE_SEPARATORS
);
1148 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to extract target path: %s", rvalue
);
1150 target
= source
; /* No target, then it's the same as the source */
1155 return log_syntax(unit
, LOG_ERR
, filename
, line
, SYNTHETIC_ERRNO(EINVAL
), "Too many arguments: %s", rvalue
);
1157 r
= specifier_printf(source
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved_source
);
1159 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1160 "Failed to expand specifiers in CopyFiles= source, ignoring: %s", rvalue
);
1164 r
= path_simplify_and_warn(resolved_source
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1168 r
= specifier_printf(target
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved_target
);
1170 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1171 "Failed to expand specifiers in CopyFiles= target, ignoring: %s", resolved_target
);
1175 r
= path_simplify_and_warn(resolved_target
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1179 r
= strv_consume_pair(&partition
->copy_files
, TAKE_PTR(resolved_source
), TAKE_PTR(resolved_target
));
1186 static int config_parse_copy_blocks(
1188 const char *filename
,
1190 const char *section
,
1191 unsigned section_line
,
1198 _cleanup_free_
char *d
= NULL
;
1199 Partition
*partition
= data
;
1205 if (isempty(rvalue
)) {
1206 partition
->copy_blocks_path
= mfree(partition
->copy_blocks_path
);
1207 partition
->copy_blocks_auto
= false;
1211 if (streq(rvalue
, "auto")) {
1212 partition
->copy_blocks_path
= mfree(partition
->copy_blocks_path
);
1213 partition
->copy_blocks_auto
= true;
1217 r
= specifier_printf(rvalue
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &d
);
1219 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1220 "Failed to expand specifiers in CopyBlocks= source path, ignoring: %s", rvalue
);
1224 r
= path_simplify_and_warn(d
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1228 free_and_replace(partition
->copy_blocks_path
, d
);
1229 partition
->copy_blocks_auto
= false;
1233 static int config_parse_make_dirs(
1235 const char *filename
,
1237 const char *section
,
1238 unsigned section_line
,
1245 Partition
*partition
= data
;
1246 const char *p
= rvalue
;
1253 _cleanup_free_
char *word
= NULL
, *d
= NULL
;
1255 r
= extract_first_word(&p
, &word
, NULL
, EXTRACT_UNQUOTE
);
1259 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
, "Invalid syntax, ignoring: %s", rvalue
);
1265 r
= specifier_printf(word
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &d
);
1267 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1268 "Failed to expand specifiers in MakeDirectories= parameter, ignoring: %s", word
);
1272 r
= path_simplify_and_warn(d
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1276 r
= strv_consume(&partition
->make_directories
, TAKE_PTR(d
));
1282 static DEFINE_CONFIG_PARSE_ENUM_WITH_DEFAULT(config_parse_encrypt
, encrypt_mode
, EncryptMode
, ENCRYPT_OFF
, "Invalid encryption mode");
1284 static int config_parse_gpt_flags(
1286 const char *filename
,
1288 const char *section
,
1289 unsigned section_line
,
1296 uint64_t *gpt_flags
= data
;
1302 r
= safe_atou64(rvalue
, gpt_flags
);
1304 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1305 "Failed to parse Flags= value, ignoring: %s", rvalue
);
1312 static int partition_read_definition(Partition
*p
, const char *path
) {
1314 ConfigTableItem table
[] = {
1315 { "Partition", "Type", config_parse_type
, 0, &p
->type_uuid
},
1316 { "Partition", "Label", config_parse_label
, 0, &p
->new_label
},
1317 { "Partition", "UUID", config_parse_id128
, 0, &p
->new_uuid
},
1318 { "Partition", "Priority", config_parse_int32
, 0, &p
->priority
},
1319 { "Partition", "Weight", config_parse_weight
, 0, &p
->weight
},
1320 { "Partition", "PaddingWeight", config_parse_weight
, 0, &p
->padding_weight
},
1321 { "Partition", "SizeMinBytes", config_parse_size4096
, 1, &p
->size_min
},
1322 { "Partition", "SizeMaxBytes", config_parse_size4096
, -1, &p
->size_max
},
1323 { "Partition", "PaddingMinBytes", config_parse_size4096
, 1, &p
->padding_min
},
1324 { "Partition", "PaddingMaxBytes", config_parse_size4096
, -1, &p
->padding_max
},
1325 { "Partition", "FactoryReset", config_parse_bool
, 0, &p
->factory_reset
},
1326 { "Partition", "CopyBlocks", config_parse_copy_blocks
, 0, p
},
1327 { "Partition", "Format", config_parse_fstype
, 0, &p
->format
},
1328 { "Partition", "CopyFiles", config_parse_copy_files
, 0, p
},
1329 { "Partition", "MakeDirectories", config_parse_make_dirs
, 0, p
},
1330 { "Partition", "Encrypt", config_parse_encrypt
, 0, &p
->encrypt
},
1331 { "Partition", "Flags", config_parse_gpt_flags
, 0, &p
->gpt_flags
},
1332 { "Partition", "ReadOnly", config_parse_tristate
, 0, &p
->read_only
},
1333 { "Partition", "NoAuto", config_parse_tristate
, 0, &p
->no_auto
},
1334 { "Partition", "GrowFileSystem", config_parse_tristate
, 0, &p
->growfs
},
1339 r
= config_parse(NULL
, path
, NULL
,
1341 config_item_table_lookup
, table
,
1348 if (p
->size_min
!= UINT64_MAX
&& p
->size_max
!= UINT64_MAX
&& p
->size_min
> p
->size_max
)
1349 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1350 "SizeMinBytes= larger than SizeMaxBytes=, refusing.");
1352 if (p
->padding_min
!= UINT64_MAX
&& p
->padding_max
!= UINT64_MAX
&& p
->padding_min
> p
->padding_max
)
1353 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1354 "PaddingMinBytes= larger than PaddingMaxBytes=, refusing.");
1356 if (sd_id128_is_null(p
->type_uuid
))
1357 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1358 "Type= not defined, refusing.");
1360 if ((p
->copy_blocks_path
|| p
->copy_blocks_auto
) &&
1361 (p
->format
|| !strv_isempty(p
->copy_files
) || !strv_isempty(p
->make_directories
)))
1362 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1363 "Format=/CopyFiles=/MakeDirectories= and CopyBlocks= cannot be combined, refusing.");
1365 if ((!strv_isempty(p
->copy_files
) || !strv_isempty(p
->make_directories
)) && streq_ptr(p
->format
, "swap"))
1366 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1367 "Format=swap and CopyFiles= cannot be combined, refusing.");
1369 if (!p
->format
&& (!strv_isempty(p
->copy_files
) || !strv_isempty(p
->make_directories
) || (p
->encrypt
!= ENCRYPT_OFF
&& !(p
->copy_blocks_path
|| p
->copy_blocks_auto
)))) {
1370 /* Pick "ext4" as file system if we are configured to copy files or encrypt the device */
1371 p
->format
= strdup("ext4");
1376 /* Verity partitions are read only, let's imply the RO flag hence, unless explicitly configured otherwise. */
1377 if ((gpt_partition_type_is_root_verity(p
->type_uuid
) ||
1378 gpt_partition_type_is_usr_verity(p
->type_uuid
)) &&
1380 p
->read_only
= true;
1382 /* Default to "growfs" on, unless read-only */
1383 if (gpt_partition_type_knows_growfs(p
->type_uuid
) &&
1390 static int context_read_definitions(
1392 const char *directory
,
1395 _cleanup_strv_free_
char **files
= NULL
;
1396 Partition
*last
= NULL
;
1402 r
= conf_files_list_strv(&files
, ".conf", NULL
, CONF_FILES_REGULAR
|CONF_FILES_FILTER_MASKED
, (const char**) STRV_MAKE(directory
));
1404 r
= conf_files_list_strv(&files
, ".conf", root
, CONF_FILES_REGULAR
|CONF_FILES_FILTER_MASKED
, (const char**) CONF_PATHS_STRV("repart.d"));
1406 return log_error_errno(r
, "Failed to enumerate *.conf files: %m");
1408 STRV_FOREACH(f
, files
) {
1409 _cleanup_(partition_freep
) Partition
*p
= NULL
;
1411 p
= partition_new();
1415 p
->definition_path
= strdup(*f
);
1416 if (!p
->definition_path
)
1419 r
= partition_read_definition(p
, *f
);
1423 LIST_INSERT_AFTER(partitions
, context
->partitions
, last
, p
);
1425 context
->n_partitions
++;
1431 static int determine_current_padding(
1432 struct fdisk_context
*c
,
1433 struct fdisk_table
*t
,
1434 struct fdisk_partition
*p
,
1439 size_t n_partitions
;
1440 uint64_t offset
, next
= UINT64_MAX
;
1446 if (!fdisk_partition_has_end(p
))
1447 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition has no end!");
1449 offset
= fdisk_partition_get_end(p
);
1450 assert(offset
< UINT64_MAX
/ secsz
);
1453 n_partitions
= fdisk_table_get_nents(t
);
1454 for (size_t i
= 0; i
< n_partitions
; i
++) {
1455 struct fdisk_partition
*q
;
1458 q
= fdisk_table_get_partition(t
, i
);
1460 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to read partition metadata: %m");
1462 if (fdisk_partition_is_used(q
) <= 0)
1465 if (!fdisk_partition_has_start(q
))
1468 start
= fdisk_partition_get_start(q
);
1469 assert(start
< UINT64_MAX
/ secsz
);
1472 if (start
>= offset
&& (next
== UINT64_MAX
|| next
> start
))
1476 if (next
== UINT64_MAX
) {
1477 /* No later partition? In that case check the end of the usable area */
1478 next
= fdisk_get_last_lba(c
);
1479 assert(next
< UINT64_MAX
);
1480 next
++; /* The last LBA is one sector before the end */
1482 assert(next
< UINT64_MAX
/ secsz
);
1486 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition end beyond disk end.");
1489 assert(next
>= offset
);
1490 offset
= round_up_size(offset
, grainsz
);
1491 next
= round_down_size(next
, grainsz
);
1493 *ret
= LESS_BY(next
, offset
); /* Saturated subtraction, rounding might have fucked things up */
1497 static int fdisk_ask_cb(struct fdisk_context
*c
, struct fdisk_ask
*ask
, void *data
) {
1498 _cleanup_free_
char *ids
= NULL
;
1501 if (fdisk_ask_get_type(ask
) != FDISK_ASKTYPE_STRING
)
1504 ids
= new(char, SD_ID128_UUID_STRING_MAX
);
1508 r
= fdisk_ask_string_set_result(ask
, sd_id128_to_uuid_string(*(sd_id128_t
*) data
, ids
));
1516 static int fdisk_set_disklabel_id_by_uuid(struct fdisk_context
*c
, sd_id128_t id
) {
1519 r
= fdisk_set_ask(c
, fdisk_ask_cb
, &id
);
1523 r
= fdisk_set_disklabel_id(c
);
1527 return fdisk_set_ask(c
, NULL
, NULL
);
1530 static int derive_uuid(sd_id128_t base
, const char *token
, sd_id128_t
*ret
) {
1532 uint8_t md
[SHA256_DIGEST_SIZE
];
1539 /* Derive a new UUID from the specified UUID in a stable and reasonably safe way. Specifically, we
1540 * calculate the HMAC-SHA256 of the specified token string, keyed by the supplied base (typically the
1541 * machine ID). We use the machine ID as key (and not as cleartext!) of the HMAC operation since it's
1542 * the machine ID we don't want to leak. */
1544 hmac_sha256(base
.bytes
, sizeof(base
.bytes
), token
, strlen(token
), result
.md
);
1546 /* Take the first half, mark it as v4 UUID */
1547 assert_cc(sizeof(result
.md
) == sizeof(result
.id
) * 2);
1548 *ret
= id128_make_v4_uuid(result
.id
);
1552 static int context_load_partition_table(
1557 _cleanup_(fdisk_unref_contextp
) struct fdisk_context
*c
= NULL
;
1558 _cleanup_(fdisk_unref_tablep
) struct fdisk_table
*t
= NULL
;
1559 uint64_t left_boundary
= UINT64_MAX
, first_lba
, last_lba
, nsectors
;
1560 _cleanup_free_
char *disk_uuid_string
= NULL
;
1561 bool from_scratch
= false;
1562 sd_id128_t disk_uuid
;
1563 size_t n_partitions
;
1564 unsigned long secsz
;
1571 assert(!context
->fdisk_context
);
1572 assert(!context
->free_areas
);
1573 assert(context
->start
== UINT64_MAX
);
1574 assert(context
->end
== UINT64_MAX
);
1575 assert(context
->total
== UINT64_MAX
);
1577 c
= fdisk_new_context();
1581 /* libfdisk doesn't have an API to operate on arbitrary fds, hence reopen the fd going via the
1582 * /proc/self/fd/ magic path if we have an existing fd. Open the original file otherwise. */
1583 if (*backing_fd
< 0)
1584 r
= fdisk_assign_device(c
, node
, arg_dry_run
);
1586 r
= fdisk_assign_device(c
, FORMAT_PROC_FD_PATH(*backing_fd
), arg_dry_run
);
1587 if (r
== -EINVAL
&& arg_size_auto
) {
1590 /* libfdisk returns EINVAL if opening a file of size zero. Let's check for that, and accept
1591 * it if automatic sizing is requested. */
1593 if (*backing_fd
< 0)
1594 r
= stat(node
, &st
);
1596 r
= fstat(*backing_fd
, &st
);
1598 return log_error_errno(errno
, "Failed to stat block device '%s': %m", node
);
1600 if (S_ISREG(st
.st_mode
) && st
.st_size
== 0) {
1601 /* User the fallback values if we have no better idea */
1602 context
->sector_size
= 512;
1603 context
->grain_size
= 4096;
1604 return /* from_scratch = */ true;
1610 return log_error_errno(r
, "Failed to open device '%s': %m", node
);
1612 if (*backing_fd
< 0) {
1613 /* If we have no fd referencing the device yet, make a copy of the fd now, so that we have one */
1614 *backing_fd
= fcntl(fdisk_get_devfd(c
), F_DUPFD_CLOEXEC
, 3);
1615 if (*backing_fd
< 0)
1616 return log_error_errno(errno
, "Failed to duplicate fdisk fd: %m");
1619 /* Tell udev not to interfere while we are processing the device */
1620 if (flock(fdisk_get_devfd(c
), arg_dry_run
? LOCK_SH
: LOCK_EX
) < 0)
1621 return log_error_errno(errno
, "Failed to lock block device: %m");
1623 /* The offsets/sizes libfdisk returns to us will be in multiple of the sector size of the
1624 * device. This is typically 512, and sometimes 4096. Let's query libfdisk once for it, and then use
1625 * it for all our needs. Note that the values we use ourselves always are in bytes though, thus mean
1626 * the same thing universally. Also note that regardless what kind of sector size is in use we'll
1627 * place partitions at multiples of 4K. */
1628 secsz
= fdisk_get_sector_size(c
);
1630 /* Insist on a power of two, and that it's a multiple of 512, i.e. the traditional sector size. */
1631 if (secsz
< 512 || secsz
!= 1UL << log2u64(secsz
))
1632 return log_error_errno(errno
, "Sector size %lu is not a power of two larger than 512? Refusing.", secsz
);
1634 /* Use at least 4K, and ensure it's a multiple of the sector size, regardless if that is smaller or
1636 grainsz
= secsz
< 4096 ? 4096 : secsz
;
1638 log_debug("Sector size of device is %lu bytes. Using grain size of %" PRIu64
".", secsz
, grainsz
);
1640 switch (arg_empty
) {
1643 /* Refuse empty disks, insist on an existing GPT partition table */
1644 if (!fdisk_is_labeltype(c
, FDISK_DISKLABEL_GPT
))
1645 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s has no GPT disk label, not repartitioning.", node
);
1650 /* Require an empty disk, refuse any existing partition table */
1651 r
= fdisk_has_label(c
);
1653 return log_error_errno(r
, "Failed to determine whether disk %s has a disk label: %m", node
);
1655 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s already has a disk label, refusing.", node
);
1657 from_scratch
= true;
1661 /* Allow both an empty disk and an existing partition table, but only GPT */
1662 r
= fdisk_has_label(c
);
1664 return log_error_errno(r
, "Failed to determine whether disk %s has a disk label: %m", node
);
1666 if (!fdisk_is_labeltype(c
, FDISK_DISKLABEL_GPT
))
1667 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s has non-GPT disk label, not repartitioning.", node
);
1669 from_scratch
= true;
1675 /* Always reinitiaize the disk, don't consider what there was on the disk before */
1676 from_scratch
= true;
1681 r
= fdisk_create_disklabel(c
, "gpt");
1683 return log_error_errno(r
, "Failed to create GPT disk label: %m");
1685 r
= derive_uuid(context
->seed
, "disk-uuid", &disk_uuid
);
1687 return log_error_errno(r
, "Failed to acquire disk GPT uuid: %m");
1689 r
= fdisk_set_disklabel_id_by_uuid(c
, disk_uuid
);
1691 return log_error_errno(r
, "Failed to set GPT disk label: %m");
1693 goto add_initial_free_area
;
1696 r
= fdisk_get_disklabel_id(c
, &disk_uuid_string
);
1698 return log_error_errno(r
, "Failed to get current GPT disk label UUID: %m");
1700 r
= sd_id128_from_string(disk_uuid_string
, &disk_uuid
);
1702 return log_error_errno(r
, "Failed to parse current GPT disk label UUID: %m");
1704 if (sd_id128_is_null(disk_uuid
)) {
1705 r
= derive_uuid(context
->seed
, "disk-uuid", &disk_uuid
);
1707 return log_error_errno(r
, "Failed to acquire disk GPT uuid: %m");
1709 r
= fdisk_set_disklabel_id(c
);
1711 return log_error_errno(r
, "Failed to set GPT disk label: %m");
1714 r
= fdisk_get_partitions(c
, &t
);
1716 return log_error_errno(r
, "Failed to acquire partition table: %m");
1718 n_partitions
= fdisk_table_get_nents(t
);
1719 for (size_t i
= 0; i
< n_partitions
; i
++) {
1720 _cleanup_free_
char *label_copy
= NULL
;
1721 Partition
*last
= NULL
;
1722 struct fdisk_partition
*p
;
1723 struct fdisk_parttype
*pt
;
1724 const char *pts
, *ids
, *label
;
1727 sd_id128_t ptid
, id
;
1730 p
= fdisk_table_get_partition(t
, i
);
1732 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to read partition metadata: %m");
1734 if (fdisk_partition_is_used(p
) <= 0)
1737 if (fdisk_partition_has_start(p
) <= 0 ||
1738 fdisk_partition_has_size(p
) <= 0 ||
1739 fdisk_partition_has_partno(p
) <= 0)
1740 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Found a partition without a position, size or number.");
1742 pt
= fdisk_partition_get_type(p
);
1744 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to acquire type of partition: %m");
1746 pts
= fdisk_parttype_get_string(pt
);
1748 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to acquire type of partition as string: %m");
1750 r
= sd_id128_from_string(pts
, &ptid
);
1752 return log_error_errno(r
, "Failed to parse partition type UUID %s: %m", pts
);
1754 ids
= fdisk_partition_get_uuid(p
);
1756 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Found a partition without a UUID.");
1758 r
= sd_id128_from_string(ids
, &id
);
1760 return log_error_errno(r
, "Failed to parse partition UUID %s: %m", ids
);
1762 label
= fdisk_partition_get_name(p
);
1763 if (!isempty(label
)) {
1764 label_copy
= strdup(label
);
1769 sz
= fdisk_partition_get_size(p
);
1770 assert(sz
<= UINT64_MAX
/secsz
);
1773 start
= fdisk_partition_get_start(p
);
1774 assert(start
<= UINT64_MAX
/secsz
);
1777 partno
= fdisk_partition_get_partno(p
);
1779 if (left_boundary
== UINT64_MAX
|| left_boundary
> start
)
1780 left_boundary
= start
;
1782 /* Assign this existing partition to the first partition of the right type that doesn't have
1783 * an existing one assigned yet. */
1784 LIST_FOREACH(partitions
, pp
, context
->partitions
) {
1787 if (!sd_id128_equal(pp
->type_uuid
, ptid
))
1790 if (!pp
->current_partition
) {
1791 pp
->current_uuid
= id
;
1792 pp
->current_size
= sz
;
1794 pp
->partno
= partno
;
1795 pp
->current_label
= TAKE_PTR(label_copy
);
1797 pp
->current_partition
= p
;
1798 fdisk_ref_partition(p
);
1800 r
= determine_current_padding(c
, t
, p
, secsz
, grainsz
, &pp
->current_padding
);
1804 if (pp
->current_padding
> 0) {
1805 r
= context_add_free_area(context
, pp
->current_padding
, pp
);
1815 /* If we have no matching definition, create a new one. */
1817 _cleanup_(partition_freep
) Partition
*np
= NULL
;
1819 np
= partition_new();
1823 np
->current_uuid
= id
;
1824 np
->type_uuid
= ptid
;
1825 np
->current_size
= sz
;
1827 np
->partno
= partno
;
1828 np
->current_label
= TAKE_PTR(label_copy
);
1830 np
->current_partition
= p
;
1831 fdisk_ref_partition(p
);
1833 r
= determine_current_padding(c
, t
, p
, secsz
, grainsz
, &np
->current_padding
);
1837 if (np
->current_padding
> 0) {
1838 r
= context_add_free_area(context
, np
->current_padding
, np
);
1843 LIST_INSERT_AFTER(partitions
, context
->partitions
, last
, TAKE_PTR(np
));
1844 context
->n_partitions
++;
1848 add_initial_free_area
:
1849 nsectors
= fdisk_get_nsectors(c
);
1850 assert(nsectors
<= UINT64_MAX
/secsz
);
1853 first_lba
= fdisk_get_first_lba(c
);
1854 assert(first_lba
<= UINT64_MAX
/secsz
);
1857 last_lba
= fdisk_get_last_lba(c
);
1858 assert(last_lba
< UINT64_MAX
);
1860 assert(last_lba
<= UINT64_MAX
/secsz
);
1863 assert(last_lba
>= first_lba
);
1865 if (left_boundary
== UINT64_MAX
) {
1866 /* No partitions at all? Then the whole disk is up for grabs. */
1868 first_lba
= round_up_size(first_lba
, grainsz
);
1869 last_lba
= round_down_size(last_lba
, grainsz
);
1871 if (last_lba
> first_lba
) {
1872 r
= context_add_free_area(context
, last_lba
- first_lba
, NULL
);
1877 /* Add space left of first partition */
1878 assert(left_boundary
>= first_lba
);
1880 first_lba
= round_up_size(first_lba
, grainsz
);
1881 left_boundary
= round_down_size(left_boundary
, grainsz
);
1882 last_lba
= round_down_size(last_lba
, grainsz
);
1884 if (left_boundary
> first_lba
) {
1885 r
= context_add_free_area(context
, left_boundary
- first_lba
, NULL
);
1891 context
->start
= first_lba
;
1892 context
->end
= last_lba
;
1893 context
->total
= nsectors
;
1894 context
->sector_size
= secsz
;
1895 context
->grain_size
= grainsz
;
1896 context
->fdisk_context
= TAKE_PTR(c
);
1898 return from_scratch
;
1901 static void context_unload_partition_table(Context
*context
) {
1904 LIST_FOREACH(partitions
, p
, context
->partitions
) {
1906 /* Entirely remove partitions that have no configuration */
1907 if (PARTITION_IS_FOREIGN(p
)) {
1908 partition_unlink_and_free(context
, p
);
1912 /* Otherwise drop all data we read off the block device and everything we might have
1913 * calculated based on it */
1916 p
->current_size
= UINT64_MAX
;
1917 p
->new_size
= UINT64_MAX
;
1918 p
->current_padding
= UINT64_MAX
;
1919 p
->new_padding
= UINT64_MAX
;
1920 p
->partno
= UINT64_MAX
;
1921 p
->offset
= UINT64_MAX
;
1923 if (p
->current_partition
) {
1924 fdisk_unref_partition(p
->current_partition
);
1925 p
->current_partition
= NULL
;
1928 if (p
->new_partition
) {
1929 fdisk_unref_partition(p
->new_partition
);
1930 p
->new_partition
= NULL
;
1933 p
->padding_area
= NULL
;
1934 p
->allocated_to_area
= NULL
;
1936 p
->current_uuid
= SD_ID128_NULL
;
1937 p
->current_label
= mfree(p
->current_label
);
1940 context
->start
= UINT64_MAX
;
1941 context
->end
= UINT64_MAX
;
1942 context
->total
= UINT64_MAX
;
1944 if (context
->fdisk_context
) {
1945 fdisk_unref_context(context
->fdisk_context
);
1946 context
->fdisk_context
= NULL
;
1949 context_free_free_areas(context
);
1952 static int format_size_change(uint64_t from
, uint64_t to
, char **ret
) {
1955 if (from
!= UINT64_MAX
) {
1956 if (from
== to
|| to
== UINT64_MAX
)
1957 t
= strdup(FORMAT_BYTES(from
));
1959 t
= strjoin(FORMAT_BYTES(from
), " ", special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), " ", FORMAT_BYTES(to
));
1960 } else if (to
!= UINT64_MAX
)
1961 t
= strjoin(special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), " ", FORMAT_BYTES(to
));
1974 static const char *partition_label(const Partition
*p
) {
1978 return p
->new_label
;
1980 if (p
->current_label
)
1981 return p
->current_label
;
1983 return gpt_partition_type_uuid_to_string(p
->type_uuid
);
1986 static int context_dump_partitions(Context
*context
, const char *node
) {
1987 _cleanup_(table_unrefp
) Table
*t
= NULL
;
1988 uint64_t sum_padding
= 0, sum_size
= 0;
1991 if ((arg_json_format_flags
& JSON_FORMAT_OFF
) && context
->n_partitions
== 0) {
1992 log_info("Empty partition table.");
1996 t
= table_new("type", "label", "uuid", "file", "node", "offset", "old size", "raw size", "size", "old padding", "raw padding", "padding", "activity");
2000 if (!DEBUG_LOGGING
) {
2001 if (arg_json_format_flags
& JSON_FORMAT_OFF
)
2002 (void) table_set_display(t
, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
2003 (size_t) 8, (size_t) 11);
2005 (void) table_set_display(t
, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
2006 (size_t) 5, (size_t) 6, (size_t) 7, (size_t) 9, (size_t) 10, (size_t) 12);
2009 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 5), 100);
2010 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 6), 100);
2011 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 7), 100);
2012 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 8), 100);
2013 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 9), 100);
2014 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 10), 100);
2015 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 11), 100);
2017 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2018 _cleanup_free_
char *size_change
= NULL
, *padding_change
= NULL
, *partname
= NULL
;
2019 char uuid_buffer
[SD_ID128_UUID_STRING_MAX
];
2020 const char *label
, *activity
= NULL
;
2025 if (p
->current_size
== UINT64_MAX
)
2026 activity
= "create";
2027 else if (p
->current_size
!= p
->new_size
)
2028 activity
= "resize";
2030 label
= partition_label(p
);
2031 partname
= p
->partno
!= UINT64_MAX
? fdisk_partname(node
, p
->partno
+1) : NULL
;
2033 r
= format_size_change(p
->current_size
, p
->new_size
, &size_change
);
2037 r
= format_size_change(p
->current_padding
, p
->new_padding
, &padding_change
);
2041 if (p
->new_size
!= UINT64_MAX
)
2042 sum_size
+= p
->new_size
;
2043 if (p
->new_padding
!= UINT64_MAX
)
2044 sum_padding
+= p
->new_padding
;
2048 TABLE_STRING
, gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, uuid_buffer
),
2049 TABLE_STRING
, empty_to_null(label
) ?: "-", TABLE_SET_COLOR
, empty_to_null(label
) ? NULL
: ansi_grey(),
2050 TABLE_UUID
, sd_id128_is_null(p
->new_uuid
) ? p
->current_uuid
: p
->new_uuid
,
2051 TABLE_STRING
, p
->definition_path
? basename(p
->definition_path
) : "-", TABLE_SET_COLOR
, p
->definition_path
? NULL
: ansi_grey(),
2052 TABLE_STRING
, partname
?: "-", TABLE_SET_COLOR
, partname
? NULL
: ansi_highlight(),
2053 TABLE_UINT64
, p
->offset
,
2054 TABLE_UINT64
, p
->current_size
== UINT64_MAX
? 0 : p
->current_size
,
2055 TABLE_UINT64
, p
->new_size
,
2056 TABLE_STRING
, size_change
, TABLE_SET_COLOR
, !p
->partitions_next
&& sum_size
> 0 ? ansi_underline() : NULL
,
2057 TABLE_UINT64
, p
->current_padding
== UINT64_MAX
? 0 : p
->current_padding
,
2058 TABLE_UINT64
, p
->new_padding
,
2059 TABLE_STRING
, padding_change
, TABLE_SET_COLOR
, !p
->partitions_next
&& sum_padding
> 0 ? ansi_underline() : NULL
,
2060 TABLE_STRING
, activity
?: "unchanged");
2062 return table_log_add_error(r
);
2065 if ((arg_json_format_flags
& JSON_FORMAT_OFF
) && (sum_padding
> 0 || sum_size
> 0)) {
2068 a
= strjoina(special_glyph(SPECIAL_GLYPH_SIGMA
), " = ", FORMAT_BYTES(sum_size
));
2069 b
= strjoina(special_glyph(SPECIAL_GLYPH_SIGMA
), " = ", FORMAT_BYTES(sum_padding
));
2087 return table_log_add_error(r
);
2090 return table_print_with_pager(t
, arg_json_format_flags
, arg_pager_flags
, arg_legend
);
2093 static void context_bar_char_process_partition(
2098 size_t *ret_start
) {
2100 uint64_t from
, to
, total
;
2111 assert(p
->offset
!= UINT64_MAX
);
2112 assert(p
->new_size
!= UINT64_MAX
);
2115 to
= from
+ p
->new_size
;
2117 assert(context
->total
> 0);
2118 total
= context
->total
;
2120 assert(from
<= total
);
2121 x
= from
* n
/ total
;
2123 assert(to
<= total
);
2129 for (size_t i
= x
; i
< y
; i
++)
2135 static int partition_hint(const Partition
*p
, const char *node
, char **ret
) {
2136 _cleanup_free_
char *buf
= NULL
;
2140 /* Tries really hard to find a suitable description for this partition */
2142 if (p
->definition_path
) {
2143 buf
= strdup(basename(p
->definition_path
));
2147 label
= partition_label(p
);
2148 if (!isempty(label
)) {
2149 buf
= strdup(label
);
2153 if (p
->partno
!= UINT64_MAX
) {
2154 buf
= fdisk_partname(node
, p
->partno
+1);
2158 if (!sd_id128_is_null(p
->new_uuid
))
2160 else if (!sd_id128_is_null(p
->current_uuid
))
2161 id
= p
->current_uuid
;
2165 buf
= strdup(SD_ID128_TO_UUID_STRING(id
));
2171 *ret
= TAKE_PTR(buf
);
2175 static int context_dump_partition_bar(Context
*context
, const char *node
) {
2176 _cleanup_free_ Partition
**bar
= NULL
;
2177 _cleanup_free_
size_t *start_array
= NULL
;
2178 Partition
*last
= NULL
;
2182 assert_se((c
= columns()) >= 2);
2183 c
-= 2; /* We do not use the leftmost and rightmost character cell */
2185 bar
= new0(Partition
*, c
);
2189 start_array
= new(size_t, context
->n_partitions
);
2193 LIST_FOREACH(partitions
, p
, context
->partitions
)
2194 context_bar_char_process_partition(context
, bar
, c
, p
, start_array
+ j
++);
2198 for (size_t i
= 0; i
< c
; i
++) {
2203 fputs(z
? ansi_green() : ansi_yellow(), stdout
);
2204 fputs(special_glyph(SPECIAL_GLYPH_DARK_SHADE
), stdout
);
2206 fputs(ansi_normal(), stdout
);
2207 fputs(special_glyph(SPECIAL_GLYPH_LIGHT_SHADE
), stdout
);
2213 fputs(ansi_normal(), stdout
);
2216 for (size_t i
= 0; i
< context
->n_partitions
; i
++) {
2217 _cleanup_free_
char **line
= NULL
;
2219 line
= new0(char*, c
);
2224 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2225 _cleanup_free_
char *d
= NULL
;
2228 if (i
< context
->n_partitions
- j
) {
2230 if (line
[start_array
[j
-1]]) {
2233 /* Upgrade final corner to the right with a branch to the right */
2234 e
= startswith(line
[start_array
[j
-1]], special_glyph(SPECIAL_GLYPH_TREE_RIGHT
));
2236 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH
), e
);
2243 d
= strdup(special_glyph(SPECIAL_GLYPH_TREE_VERTICAL
));
2248 } else if (i
== context
->n_partitions
- j
) {
2249 _cleanup_free_
char *hint
= NULL
;
2251 (void) partition_hint(p
, node
, &hint
);
2253 if (streq_ptr(line
[start_array
[j
-1]], special_glyph(SPECIAL_GLYPH_TREE_VERTICAL
)))
2254 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH
), " ", strna(hint
));
2256 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_RIGHT
), " ", strna(hint
));
2263 free_and_replace(line
[start_array
[j
-1]], d
);
2271 fputs(line
[j
], stdout
);
2272 j
+= utf8_console_width(line
[j
]);
2281 for (j
= 0; j
< c
; j
++)
2288 static bool context_changed(const Context
*context
) {
2291 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2295 if (p
->allocated_to_area
)
2298 if (p
->new_size
!= p
->current_size
)
2305 static int context_wipe_range(Context
*context
, uint64_t offset
, uint64_t size
) {
2306 _cleanup_(blkid_free_probep
) blkid_probe probe
= NULL
;
2310 assert(offset
!= UINT64_MAX
);
2311 assert(size
!= UINT64_MAX
);
2313 probe
= blkid_new_probe();
2318 r
= blkid_probe_set_device(probe
, fdisk_get_devfd(context
->fdisk_context
), offset
, size
);
2320 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to allocate device probe for wiping.");
2323 if (blkid_probe_enable_superblocks(probe
, true) < 0 ||
2324 blkid_probe_set_superblocks_flags(probe
, BLKID_SUBLKS_MAGIC
|BLKID_SUBLKS_BADCSUM
) < 0 ||
2325 blkid_probe_enable_partitions(probe
, true) < 0 ||
2326 blkid_probe_set_partitions_flags(probe
, BLKID_PARTS_MAGIC
) < 0)
2327 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to enable superblock and partition probing.");
2331 r
= blkid_do_probe(probe
);
2333 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to probe for file systems.");
2338 if (blkid_do_wipe(probe
, false) < 0)
2339 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to wipe file system signature.");
2345 static int context_wipe_partition(Context
*context
, Partition
*p
) {
2350 assert(!PARTITION_EXISTS(p
)); /* Safety check: never wipe existing partitions */
2352 assert(p
->offset
!= UINT64_MAX
);
2353 assert(p
->new_size
!= UINT64_MAX
);
2355 r
= context_wipe_range(context
, p
->offset
, p
->new_size
);
2359 log_info("Successfully wiped file system signatures from future partition %" PRIu64
".", p
->partno
);
2363 static int context_discard_range(
2372 assert(offset
!= UINT64_MAX
);
2373 assert(size
!= UINT64_MAX
);
2378 assert_se((fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
2380 if (fstat(fd
, &st
) < 0)
2383 if (S_ISREG(st
.st_mode
)) {
2384 if (fallocate(fd
, FALLOC_FL_PUNCH_HOLE
|FALLOC_FL_KEEP_SIZE
, offset
, size
) < 0) {
2385 if (ERRNO_IS_NOT_SUPPORTED(errno
))
2394 if (S_ISBLK(st
.st_mode
)) {
2395 uint64_t range
[2], end
;
2397 range
[0] = round_up_size(offset
, context
->sector_size
);
2399 if (offset
> UINT64_MAX
- size
)
2402 end
= offset
+ size
;
2403 if (end
<= range
[0])
2406 range
[1] = round_down_size(end
- range
[0], context
->sector_size
);
2410 if (ioctl(fd
, BLKDISCARD
, range
) < 0) {
2411 if (ERRNO_IS_NOT_SUPPORTED(errno
))
2423 static int context_discard_partition(Context
*context
, Partition
*p
) {
2429 assert(p
->offset
!= UINT64_MAX
);
2430 assert(p
->new_size
!= UINT64_MAX
);
2431 assert(!PARTITION_EXISTS(p
)); /* Safety check: never discard existing partitions */
2436 r
= context_discard_range(context
, p
->offset
, p
->new_size
);
2437 if (r
== -EOPNOTSUPP
) {
2438 log_info("Storage does not support discard, not discarding data in future partition %" PRIu64
".", p
->partno
);
2442 /* Let's handle this gracefully: https://bugzilla.kernel.org/show_bug.cgi?id=211167 */
2443 log_info("Block device is busy, not discarding partition %" PRIu64
" because it probably is mounted.", p
->partno
);
2447 log_info("Partition %" PRIu64
" too short for discard, skipping.", p
->partno
);
2451 return log_error_errno(r
, "Failed to discard data for future partition %" PRIu64
".", p
->partno
);
2453 log_info("Successfully discarded data from future partition %" PRIu64
".", p
->partno
);
2457 static int context_discard_gap_after(Context
*context
, Partition
*p
) {
2458 uint64_t gap
, next
= UINT64_MAX
;
2462 assert(!p
|| (p
->offset
!= UINT64_MAX
&& p
->new_size
!= UINT64_MAX
));
2465 gap
= p
->offset
+ p
->new_size
;
2467 gap
= context
->start
;
2469 LIST_FOREACH(partitions
, q
, context
->partitions
) {
2473 assert(q
->offset
!= UINT64_MAX
);
2474 assert(q
->new_size
!= UINT64_MAX
);
2476 if (q
->offset
< gap
)
2479 if (next
== UINT64_MAX
|| q
->offset
< next
)
2483 if (next
== UINT64_MAX
) {
2484 next
= context
->end
;
2486 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition end beyond disk end.");
2489 assert(next
>= gap
);
2490 r
= context_discard_range(context
, gap
, next
- gap
);
2491 if (r
== -EOPNOTSUPP
) {
2493 log_info("Storage does not support discard, not discarding gap after partition %" PRIu64
".", p
->partno
);
2495 log_info("Storage does not support discard, not discarding gap at beginning of disk.");
2498 if (r
== 0) /* Too short */
2502 return log_error_errno(r
, "Failed to discard gap after partition %" PRIu64
".", p
->partno
);
2504 return log_error_errno(r
, "Failed to discard gap at beginning of disk.");
2508 log_info("Successfully discarded gap after partition %" PRIu64
".", p
->partno
);
2510 log_info("Successfully discarded gap at beginning of disk.");
2515 static int context_wipe_and_discard(Context
*context
, bool from_scratch
) {
2520 /* Wipe and discard the contents of all partitions we are about to create. We skip the discarding if
2521 * we were supposed to start from scratch anyway, as in that case we just discard the whole block
2522 * device in one go early on. */
2524 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2526 if (!p
->allocated_to_area
)
2529 r
= context_wipe_partition(context
, p
);
2533 if (!from_scratch
) {
2534 r
= context_discard_partition(context
, p
);
2538 r
= context_discard_gap_after(context
, p
);
2544 if (!from_scratch
) {
2545 r
= context_discard_gap_after(context
, NULL
);
2553 static int partition_encrypt(
2557 struct crypt_device
**ret_cd
,
2560 #if HAVE_LIBCRYPTSETUP
2561 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2562 _cleanup_(erase_and_freep
) void *volume_key
= NULL
;
2563 _cleanup_free_
char *dm_name
= NULL
, *vol
= NULL
;
2564 size_t volume_key_size
= 256 / 8;
2570 assert(p
->encrypt
!= ENCRYPT_OFF
);
2572 log_debug("Encryption mode for partition %" PRIu64
": %s", p
->partno
, encrypt_mode_to_string(p
->encrypt
));
2574 r
= dlopen_cryptsetup();
2576 return log_error_errno(r
, "libcryptsetup not found, cannot encrypt: %m");
2578 if (asprintf(&dm_name
, "luks-repart-%08" PRIx64
, random_u64()) < 0)
2582 vol
= path_join("/dev/mapper/", dm_name
);
2587 r
= derive_uuid(p
->new_uuid
, "luks-uuid", &uuid
);
2591 log_info("Encrypting future partition %" PRIu64
"...", p
->partno
);
2593 volume_key
= malloc(volume_key_size
);
2597 r
= genuine_random_bytes(volume_key
, volume_key_size
, RANDOM_BLOCK
);
2599 return log_error_errno(r
, "Failed to generate volume key: %m");
2601 r
= sym_crypt_init(&cd
, node
);
2603 return log_error_errno(r
, "Failed to allocate libcryptsetup context: %m");
2605 cryptsetup_enable_logging(cd
);
2607 r
= sym_crypt_format(cd
,
2611 SD_ID128_TO_UUID_STRING(uuid
),
2614 &(struct crypt_params_luks2
) {
2615 .label
= strempty(p
->new_label
),
2616 .sector_size
= context
->sector_size
,
2619 return log_error_errno(r
, "Failed to LUKS2 format future partition: %m");
2621 if (IN_SET(p
->encrypt
, ENCRYPT_KEY_FILE
, ENCRYPT_KEY_FILE_TPM2
)) {
2622 r
= sym_crypt_keyslot_add_by_volume_key(
2630 return log_error_errno(r
, "Failed to add LUKS2 key: %m");
2633 if (IN_SET(p
->encrypt
, ENCRYPT_TPM2
, ENCRYPT_KEY_FILE_TPM2
)) {
2635 _cleanup_(erase_and_freep
) char *base64_encoded
= NULL
;
2636 _cleanup_(json_variant_unrefp
) JsonVariant
*v
= NULL
;
2637 _cleanup_(erase_and_freep
) void *secret
= NULL
;
2638 _cleanup_free_
void *blob
= NULL
, *hash
= NULL
;
2639 size_t secret_size
, blob_size
, hash_size
;
2640 uint16_t pcr_bank
, primary_alg
;
2643 r
= tpm2_seal(arg_tpm2_device
, arg_tpm2_pcr_mask
, NULL
, &secret
, &secret_size
, &blob
, &blob_size
, &hash
, &hash_size
, &pcr_bank
, &primary_alg
);
2645 return log_error_errno(r
, "Failed to seal to TPM2: %m");
2647 r
= base64mem(secret
, secret_size
, &base64_encoded
);
2649 return log_error_errno(r
, "Failed to base64 encode secret key: %m");
2651 r
= cryptsetup_set_minimal_pbkdf(cd
);
2653 return log_error_errno(r
, "Failed to set minimal PBKDF: %m");
2655 keyslot
= sym_crypt_keyslot_add_by_volume_key(
2661 strlen(base64_encoded
));
2663 return log_error_errno(keyslot
, "Failed to add new TPM2 key to %s: %m", node
);
2665 r
= tpm2_make_luks2_json(keyslot
, arg_tpm2_pcr_mask
, pcr_bank
, primary_alg
, blob
, blob_size
, hash
, hash_size
, 0, &v
);
2667 return log_error_errno(r
, "Failed to prepare TPM2 JSON token object: %m");
2669 r
= cryptsetup_add_token_json(cd
, v
);
2671 return log_error_errno(r
, "Failed to add TPM2 JSON token to LUKS2 header: %m");
2673 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
),
2674 "Support for TPM2 enrollment not enabled.");
2678 r
= sym_crypt_activate_by_volume_key(
2683 arg_discard
? CRYPT_ACTIVATE_ALLOW_DISCARDS
: 0);
2685 return log_error_errno(r
, "Failed to activate LUKS superblock: %m");
2687 log_info("Successfully encrypted future partition %" PRIu64
".", p
->partno
);
2690 _cleanup_close_
int dev_fd
= -1;
2692 dev_fd
= open(vol
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
);
2694 return log_error_errno(errno
, "Failed to open LUKS volume '%s': %m", vol
);
2696 *ret_fd
= TAKE_FD(dev_fd
);
2700 *ret_cd
= TAKE_PTR(cd
);
2702 *ret_volume
= TAKE_PTR(vol
);
2706 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
), "libcryptsetup is not supported, cannot encrypt: %m");
2710 static int deactivate_luks(struct crypt_device
*cd
, const char *node
) {
2711 #if HAVE_LIBCRYPTSETUP
2719 /* udev or so might access out block device in the background while we are done. Let's hence force
2720 * detach the volume. We sync'ed before, hence this should be safe. */
2722 r
= sym_crypt_deactivate_by_name(cd
, basename(node
), CRYPT_DEACTIVATE_FORCE
);
2724 return log_error_errno(r
, "Failed to deactivate LUKS device: %m");
2732 static int context_copy_blocks(Context
*context
) {
2733 int whole_fd
= -1, r
;
2737 /* Copy in file systems on the block level */
2739 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2740 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2741 _cleanup_(loop_device_unrefp
) LoopDevice
*d
= NULL
;
2742 _cleanup_free_
char *encrypted
= NULL
;
2743 _cleanup_close_
int encrypted_dev_fd
= -1;
2746 if (p
->copy_blocks_fd
< 0)
2752 if (PARTITION_EXISTS(p
)) /* Never copy over existing partitions */
2755 assert(p
->new_size
!= UINT64_MAX
);
2756 assert(p
->copy_blocks_size
!= UINT64_MAX
);
2757 assert(p
->new_size
>= p
->copy_blocks_size
);
2760 assert_se((whole_fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
2762 if (p
->encrypt
!= ENCRYPT_OFF
) {
2763 r
= loop_device_make(whole_fd
, O_RDWR
, p
->offset
, p
->new_size
, 0, &d
);
2765 return log_error_errno(r
, "Failed to make loopback device of future partition %" PRIu64
": %m", p
->partno
);
2767 r
= loop_device_flock(d
, LOCK_EX
);
2769 return log_error_errno(r
, "Failed to lock loopback device: %m");
2771 r
= partition_encrypt(context
, p
, d
->node
, &cd
, &encrypted
, &encrypted_dev_fd
);
2773 return log_error_errno(r
, "Failed to encrypt device: %m");
2775 if (flock(encrypted_dev_fd
, LOCK_EX
) < 0)
2776 return log_error_errno(errno
, "Failed to lock LUKS device: %m");
2778 target_fd
= encrypted_dev_fd
;
2780 if (lseek(whole_fd
, p
->offset
, SEEK_SET
) == (off_t
) -1)
2781 return log_error_errno(errno
, "Failed to seek to partition offset: %m");
2783 target_fd
= whole_fd
;
2786 log_info("Copying in '%s' (%s) on block level into future partition %" PRIu64
".",
2787 p
->copy_blocks_path
, FORMAT_BYTES(p
->copy_blocks_size
), p
->partno
);
2789 r
= copy_bytes_full(p
->copy_blocks_fd
, target_fd
, p
->copy_blocks_size
, 0, NULL
, NULL
, NULL
, NULL
);
2791 return log_error_errno(r
, "Failed to copy in data from '%s': %m", p
->copy_blocks_path
);
2793 if (fsync(target_fd
) < 0)
2794 return log_error_errno(errno
, "Failed to synchronize copied data blocks: %m");
2796 if (p
->encrypt
!= ENCRYPT_OFF
) {
2797 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
2799 r
= deactivate_luks(cd
, encrypted
);
2806 r
= loop_device_sync(d
);
2808 return log_error_errno(r
, "Failed to sync loopback device: %m");
2811 log_info("Copying in of '%s' on block level completed.", p
->copy_blocks_path
);
2817 static int do_copy_files(Partition
*p
, const char *fs
) {
2823 STRV_FOREACH_PAIR(source
, target
, p
->copy_files
) {
2824 _cleanup_close_
int sfd
= -1, pfd
= -1, tfd
= -1;
2826 sfd
= chase_symlinks_and_open(*source
, arg_root
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_CLOEXEC
|O_NOCTTY
, NULL
);
2828 return log_error_errno(sfd
, "Failed to open source file '%s%s': %m", strempty(arg_root
), *source
);
2830 r
= fd_verify_regular(sfd
);
2833 return log_error_errno(r
, "Failed to check type of source file '%s': %m", *source
);
2835 /* We are looking at a directory */
2836 tfd
= chase_symlinks_and_open(*target
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2838 _cleanup_free_
char *dn
= NULL
, *fn
= NULL
;
2841 return log_error_errno(tfd
, "Failed to open target directory '%s': %m", *target
);
2843 r
= path_extract_filename(*target
, &fn
);
2845 return log_error_errno(r
, "Failed to extract filename from '%s': %m", *target
);
2847 r
= path_extract_directory(*target
, &dn
);
2849 return log_error_errno(r
, "Failed to extract directory from '%s': %m", *target
);
2851 r
= mkdir_p_root(fs
, dn
, UID_INVALID
, GID_INVALID
, 0755);
2853 return log_error_errno(r
, "Failed to create parent directory '%s': %m", dn
);
2855 pfd
= chase_symlinks_and_open(dn
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2857 return log_error_errno(pfd
, "Failed to open parent directory of target: %m");
2862 UID_INVALID
, GID_INVALID
,
2863 COPY_REFLINK
|COPY_MERGE
|COPY_REPLACE
|COPY_SIGINT
|COPY_HARDLINKS
|COPY_ALL_XATTRS
);
2868 UID_INVALID
, GID_INVALID
,
2869 COPY_REFLINK
|COPY_MERGE
|COPY_REPLACE
|COPY_SIGINT
|COPY_HARDLINKS
|COPY_ALL_XATTRS
);
2871 return log_error_errno(r
, "Failed to copy '%s' to '%s%s': %m", *source
, strempty(arg_root
), *target
);
2873 _cleanup_free_
char *dn
= NULL
, *fn
= NULL
;
2875 /* We are looking at a regular file */
2877 r
= path_extract_filename(*target
, &fn
);
2878 if (r
== -EADDRNOTAVAIL
|| r
== O_DIRECTORY
)
2879 return log_error_errno(SYNTHETIC_ERRNO(EISDIR
),
2880 "Target path '%s' refers to a directory, but source path '%s' refers to regular file, can't copy.", *target
, *source
);
2882 return log_error_errno(r
, "Failed to extract filename from '%s': %m", *target
);
2884 r
= path_extract_directory(*target
, &dn
);
2886 return log_error_errno(r
, "Failed to extract directory from '%s': %m", *target
);
2888 r
= mkdir_p_root(fs
, dn
, UID_INVALID
, GID_INVALID
, 0755);
2890 return log_error_errno(r
, "Failed to create parent directory: %m");
2892 pfd
= chase_symlinks_and_open(dn
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2894 return log_error_errno(pfd
, "Failed to open parent directory of target: %m");
2896 tfd
= openat(pfd
, fn
, O_CREAT
|O_EXCL
|O_WRONLY
|O_CLOEXEC
, 0700);
2898 return log_error_errno(errno
, "Failed to create target file '%s': %m", *target
);
2900 r
= copy_bytes(sfd
, tfd
, UINT64_MAX
, COPY_REFLINK
|COPY_SIGINT
);
2902 return log_error_errno(r
, "Failed to copy '%s' to '%s%s': %m", *source
, strempty(arg_root
), *target
);
2904 (void) copy_xattr(sfd
, tfd
, COPY_ALL_XATTRS
);
2905 (void) copy_access(sfd
, tfd
);
2906 (void) copy_times(sfd
, tfd
, 0);
2913 static int do_make_directories(Partition
*p
, const char *fs
) {
2919 STRV_FOREACH(d
, p
->make_directories
) {
2921 r
= mkdir_p_root(fs
, *d
, UID_INVALID
, GID_INVALID
, 0755);
2923 return log_error_errno(r
, "Failed to create directory '%s' in file system: %m", *d
);
2929 static int partition_populate(Partition
*p
, const char *node
) {
2935 if (strv_isempty(p
->copy_files
) && strv_isempty(p
->make_directories
))
2938 log_info("Populating partition %" PRIu64
" with files.", p
->partno
);
2940 /* We copy in a child process, since we have to mount the fs for that, and we don't want that fs to
2941 * appear in the host namespace. Hence we fork a child that has its own file system namespace and
2942 * detached mount propagation. */
2944 r
= safe_fork("(sd-copy)", FORK_DEATHSIG
|FORK_LOG
|FORK_WAIT
|FORK_NEW_MOUNTNS
|FORK_MOUNTNS_SLAVE
, NULL
);
2948 static const char fs
[] = "/run/systemd/mount-root";
2949 /* This is a child process with its own mount namespace and propagation to host turned off */
2951 r
= mkdir_p(fs
, 0700);
2953 log_error_errno(r
, "Failed to create mount point: %m");
2954 _exit(EXIT_FAILURE
);
2957 if (mount_nofollow_verbose(LOG_ERR
, node
, fs
, p
->format
, MS_NOATIME
|MS_NODEV
|MS_NOEXEC
|MS_NOSUID
, NULL
) < 0)
2958 _exit(EXIT_FAILURE
);
2960 if (do_copy_files(p
, fs
) < 0)
2961 _exit(EXIT_FAILURE
);
2963 if (do_make_directories(p
, fs
) < 0)
2964 _exit(EXIT_FAILURE
);
2966 r
= syncfs_path(AT_FDCWD
, fs
);
2968 log_error_errno(r
, "Failed to synchronize written files: %m");
2969 _exit(EXIT_FAILURE
);
2972 _exit(EXIT_SUCCESS
);
2975 log_info("Successfully populated partition %" PRIu64
" with files.", p
->partno
);
2979 static int context_mkfs(Context
*context
) {
2984 /* Make a file system */
2986 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2987 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2988 _cleanup_(loop_device_unrefp
) LoopDevice
*d
= NULL
;
2989 _cleanup_free_
char *encrypted
= NULL
;
2990 _cleanup_close_
int encrypted_dev_fd
= -1;
2997 if (PARTITION_EXISTS(p
)) /* Never format existing partitions */
3003 assert(p
->offset
!= UINT64_MAX
);
3004 assert(p
->new_size
!= UINT64_MAX
);
3007 assert_se((fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
3009 /* Loopback block devices are not only useful to turn regular files into block devices, but
3010 * also to cut out sections of block devices into new block devices. */
3012 r
= loop_device_make(fd
, O_RDWR
, p
->offset
, p
->new_size
, 0, &d
);
3014 return log_error_errno(r
, "Failed to make loopback device of future partition %" PRIu64
": %m", p
->partno
);
3016 r
= loop_device_flock(d
, LOCK_EX
);
3018 return log_error_errno(r
, "Failed to lock loopback device: %m");
3020 if (p
->encrypt
!= ENCRYPT_OFF
) {
3021 r
= partition_encrypt(context
, p
, d
->node
, &cd
, &encrypted
, &encrypted_dev_fd
);
3023 return log_error_errno(r
, "Failed to encrypt device: %m");
3025 if (flock(encrypted_dev_fd
, LOCK_EX
) < 0)
3026 return log_error_errno(errno
, "Failed to lock LUKS device: %m");
3032 log_info("Formatting future partition %" PRIu64
".", p
->partno
);
3034 /* Calculate the UUID for the file system as HMAC-SHA256 of the string "file-system-uuid",
3035 * keyed off the partition UUID. */
3036 r
= derive_uuid(p
->new_uuid
, "file-system-uuid", &fs_uuid
);
3040 r
= make_filesystem(fsdev
, p
->format
, strempty(p
->new_label
), fs_uuid
, arg_discard
);
3042 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3043 (void) deactivate_luks(cd
, encrypted
);
3047 log_info("Successfully formatted future partition %" PRIu64
".", p
->partno
);
3049 /* The file system is now created, no need to delay udev further */
3050 if (p
->encrypt
!= ENCRYPT_OFF
)
3051 if (flock(encrypted_dev_fd
, LOCK_UN
) < 0)
3052 return log_error_errno(errno
, "Failed to unlock LUKS device: %m");
3054 r
= partition_populate(p
, fsdev
);
3056 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3057 (void) deactivate_luks(cd
, encrypted
);
3061 /* Note that we always sync explicitly here, since mkfs.fat doesn't do that on its own, and
3062 * if we don't sync before detaching a block device the in-flight sectors possibly won't hit
3065 if (p
->encrypt
!= ENCRYPT_OFF
) {
3066 if (fsync(encrypted_dev_fd
) < 0)
3067 return log_error_errno(errno
, "Failed to synchronize LUKS volume: %m");
3068 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3070 r
= deactivate_luks(cd
, encrypted
);
3078 r
= loop_device_sync(d
);
3080 return log_error_errno(r
, "Failed to sync loopback device: %m");
3086 static int partition_acquire_uuid(Context
*context
, Partition
*p
, sd_id128_t
*ret
) {
3088 sd_id128_t type_uuid
;
3090 } _packed_ plaintext
= {};
3092 uint8_t md
[SHA256_DIGEST_SIZE
];
3103 /* Calculate a good UUID for the indicated partition. We want a certain degree of reproducibility,
3104 * hence we won't generate the UUIDs randomly. Instead we use a cryptographic hash (precisely:
3105 * HMAC-SHA256) to derive them from a single seed. The seed is generally the machine ID of the
3106 * installation we are processing, but if random behaviour is desired can be random, too. We use the
3107 * seed value as key for the HMAC (since the machine ID is something we generally don't want to leak)
3108 * and the partition type as plaintext. The partition type is suffixed with a counter (only for the
3109 * second and later partition of the same type) if we have more than one partition of the same
3110 * time. Or in other words:
3113 * SEED := /etc/machine-id
3115 * If first partition instance of type TYPE_UUID:
3116 * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID)
3118 * For all later partition instances of type TYPE_UUID with INSTANCE being the LE64 encoded instance number:
3119 * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID || INSTANCE)
3122 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3126 if (!sd_id128_equal(p
->type_uuid
, q
->type_uuid
))
3132 plaintext
.type_uuid
= p
->type_uuid
;
3133 plaintext
.counter
= htole64(k
);
3135 hmac_sha256(context
->seed
.bytes
, sizeof(context
->seed
.bytes
),
3137 k
== 0 ? sizeof(sd_id128_t
) : sizeof(plaintext
),
3140 /* Take the first half, mark it as v4 UUID */
3141 assert_cc(sizeof(result
.md
) == sizeof(result
.id
) * 2);
3142 result
.id
= id128_make_v4_uuid(result
.id
);
3144 /* Ensure this partition UUID is actually unique, and there's no remaining partition from an earlier run? */
3145 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3149 if (sd_id128_in_set(result
.id
, q
->current_uuid
, q
->new_uuid
)) {
3150 log_warning("Partition UUID calculated from seed for partition %" PRIu64
" already used, reverting to randomized UUID.", p
->partno
);
3152 r
= sd_id128_randomize(&result
.id
);
3154 return log_error_errno(r
, "Failed to generate randomized UUID: %m");
3164 static int partition_acquire_label(Context
*context
, Partition
*p
, char **ret
) {
3165 _cleanup_free_
char *label
= NULL
;
3173 prefix
= gpt_partition_type_uuid_to_string(p
->type_uuid
);
3178 const char *ll
= label
?: prefix
;
3181 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3185 if (streq_ptr(ll
, q
->current_label
) ||
3186 streq_ptr(ll
, q
->new_label
)) {
3195 label
= mfree(label
);
3196 if (asprintf(&label
, "%s-%u", prefix
, ++k
) < 0)
3201 label
= strdup(prefix
);
3206 *ret
= TAKE_PTR(label
);
3210 static int context_acquire_partition_uuids_and_labels(Context
*context
) {
3215 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3216 /* Never touch foreign partitions */
3217 if (PARTITION_IS_FOREIGN(p
)) {
3218 p
->new_uuid
= p
->current_uuid
;
3220 if (p
->current_label
) {
3221 r
= free_and_strdup_warn(&p
->new_label
, strempty(p
->current_label
));
3229 if (!sd_id128_is_null(p
->current_uuid
))
3230 p
->new_uuid
= p
->current_uuid
; /* Never change initialized UUIDs */
3231 else if (sd_id128_is_null(p
->new_uuid
)) {
3232 /* Not explicitly set by user! */
3233 r
= partition_acquire_uuid(context
, p
, &p
->new_uuid
);
3238 if (!isempty(p
->current_label
)) {
3239 /* never change initialized labels */
3240 r
= free_and_strdup_warn(&p
->new_label
, p
->current_label
);
3243 } else if (!p
->new_label
) {
3244 /* Not explicitly set by user! */
3246 r
= partition_acquire_label(context
, p
, &p
->new_label
);
3255 static int set_gpt_flags(struct fdisk_partition
*q
, uint64_t flags
) {
3256 _cleanup_free_
char *a
= NULL
;
3258 for (unsigned i
= 0; i
< sizeof(flags
) * 8; i
++) {
3259 uint64_t bit
= UINT64_C(1) << i
;
3260 char buf
[DECIMAL_STR_MAX(unsigned)+1];
3262 if (!FLAGS_SET(flags
, bit
))
3265 xsprintf(buf
, "%u", i
);
3266 if (!strextend_with_separator(&a
, ",", buf
))
3270 return fdisk_partition_set_attrs(q
, a
);
3273 static uint64_t partition_merge_flags(Partition
*p
) {
3280 if (p
->no_auto
>= 0) {
3281 if (gpt_partition_type_knows_no_auto(p
->type_uuid
))
3282 SET_FLAG(f
, GPT_FLAG_NO_AUTO
, p
->no_auto
);
3284 char buffer
[SD_ID128_UUID_STRING_MAX
];
3285 log_warning("Configured NoAuto=%s for partition type '%s' that doesn't support it, ignoring.",
3287 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3291 if (p
->read_only
>= 0) {
3292 if (gpt_partition_type_knows_read_only(p
->type_uuid
))
3293 SET_FLAG(f
, GPT_FLAG_READ_ONLY
, p
->read_only
);
3295 char buffer
[SD_ID128_UUID_STRING_MAX
];
3296 log_warning("Configured ReadOnly=%s for partition type '%s' that doesn't support it, ignoring.",
3297 yes_no(p
->read_only
),
3298 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3302 if (p
->growfs
>= 0) {
3303 if (gpt_partition_type_knows_growfs(p
->type_uuid
))
3304 SET_FLAG(f
, GPT_FLAG_GROWFS
, p
->growfs
);
3306 char buffer
[SD_ID128_UUID_STRING_MAX
];
3307 log_warning("Configured GrowFileSystem=%s for partition type '%s' that doesn't support it, ignoring.",
3309 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3316 static int context_mangle_partitions(Context
*context
) {
3321 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3325 assert(p
->new_size
!= UINT64_MAX
);
3326 assert(p
->offset
!= UINT64_MAX
);
3327 assert(p
->partno
!= UINT64_MAX
);
3329 if (PARTITION_EXISTS(p
)) {
3330 bool changed
= false;
3332 assert(p
->current_partition
);
3334 if (p
->new_size
!= p
->current_size
) {
3335 assert(p
->new_size
>= p
->current_size
);
3336 assert(p
->new_size
% context
->sector_size
== 0);
3338 r
= fdisk_partition_size_explicit(p
->current_partition
, true);
3340 return log_error_errno(r
, "Failed to enable explicit sizing: %m");
3342 r
= fdisk_partition_set_size(p
->current_partition
, p
->new_size
/ context
->sector_size
);
3344 return log_error_errno(r
, "Failed to grow partition: %m");
3346 log_info("Growing existing partition %" PRIu64
".", p
->partno
);
3350 if (!sd_id128_equal(p
->new_uuid
, p
->current_uuid
)) {
3351 assert(!sd_id128_is_null(p
->new_uuid
));
3353 r
= fdisk_partition_set_uuid(p
->current_partition
, SD_ID128_TO_UUID_STRING(p
->new_uuid
));
3355 return log_error_errno(r
, "Failed to set partition UUID: %m");
3357 log_info("Initializing UUID of existing partition %" PRIu64
".", p
->partno
);
3361 if (!streq_ptr(p
->new_label
, p
->current_label
)) {
3362 r
= fdisk_partition_set_name(p
->current_partition
, strempty(p
->new_label
));
3364 return log_error_errno(r
, "Failed to set partition label: %m");
3366 log_info("Setting partition label of existing partition %" PRIu64
".", p
->partno
);
3371 assert(!PARTITION_IS_FOREIGN(p
)); /* never touch foreign partitions */
3373 r
= fdisk_set_partition(context
->fdisk_context
, p
->partno
, p
->current_partition
);
3375 return log_error_errno(r
, "Failed to update partition: %m");
3378 _cleanup_(fdisk_unref_partitionp
) struct fdisk_partition
*q
= NULL
;
3379 _cleanup_(fdisk_unref_parttypep
) struct fdisk_parttype
*t
= NULL
;
3381 assert(!p
->new_partition
);
3382 assert(p
->offset
% context
->sector_size
== 0);
3383 assert(p
->new_size
% context
->sector_size
== 0);
3384 assert(!sd_id128_is_null(p
->new_uuid
));
3385 assert(p
->new_label
);
3387 t
= fdisk_new_parttype();
3391 r
= fdisk_parttype_set_typestr(t
, SD_ID128_TO_UUID_STRING(p
->type_uuid
));
3393 return log_error_errno(r
, "Failed to initialize partition type: %m");
3395 q
= fdisk_new_partition();
3399 r
= fdisk_partition_set_type(q
, t
);
3401 return log_error_errno(r
, "Failed to set partition type: %m");
3403 r
= fdisk_partition_size_explicit(q
, true);
3405 return log_error_errno(r
, "Failed to enable explicit sizing: %m");
3407 r
= fdisk_partition_set_start(q
, p
->offset
/ context
->sector_size
);
3409 return log_error_errno(r
, "Failed to position partition: %m");
3411 r
= fdisk_partition_set_size(q
, p
->new_size
/ context
->sector_size
);
3413 return log_error_errno(r
, "Failed to grow partition: %m");
3415 r
= fdisk_partition_set_partno(q
, p
->partno
);
3417 return log_error_errno(r
, "Failed to set partition number: %m");
3419 r
= fdisk_partition_set_uuid(q
, SD_ID128_TO_UUID_STRING(p
->new_uuid
));
3421 return log_error_errno(r
, "Failed to set partition UUID: %m");
3423 r
= fdisk_partition_set_name(q
, strempty(p
->new_label
));
3425 return log_error_errno(r
, "Failed to set partition label: %m");
3427 /* Merge the no auto + read only + growfs setting with the literal flags, and set them for the partition */
3428 r
= set_gpt_flags(q
, partition_merge_flags(p
));
3430 return log_error_errno(r
, "Failed to set GPT partition flags: %m");
3432 log_info("Adding new partition %" PRIu64
" to partition table.", p
->partno
);
3434 r
= fdisk_add_partition(context
->fdisk_context
, q
, NULL
);
3436 return log_error_errno(r
, "Failed to add partition: %m");
3438 assert(!p
->new_partition
);
3439 p
->new_partition
= TAKE_PTR(q
);
3446 static int context_write_partition_table(
3449 bool from_scratch
) {
3451 _cleanup_(fdisk_unref_tablep
) struct fdisk_table
*original_table
= NULL
;
3456 if (arg_pretty
> 0 ||
3457 (arg_pretty
< 0 && isatty(STDOUT_FILENO
) > 0) ||
3458 !FLAGS_SET(arg_json_format_flags
, JSON_FORMAT_OFF
)) {
3460 (void) context_dump_partitions(context
, node
);
3464 if (arg_json_format_flags
& JSON_FORMAT_OFF
)
3465 (void) context_dump_partition_bar(context
, node
);
3470 if (!from_scratch
&& !context_changed(context
)) {
3471 log_info("No changes.");
3476 log_notice("Refusing to repartition, please re-run with --dry-run=no.");
3480 log_info("Applying changes.");
3483 r
= context_wipe_range(context
, 0, context
->total
);
3487 log_info("Wiped block device.");
3489 r
= context_discard_range(context
, 0, context
->total
);
3490 if (r
== -EOPNOTSUPP
)
3491 log_info("Storage does not support discard, not discarding entire block device data.");
3493 return log_error_errno(r
, "Failed to discard entire block device: %m");
3495 log_info("Discarded entire block device.");
3498 r
= fdisk_get_partitions(context
->fdisk_context
, &original_table
);
3500 return log_error_errno(r
, "Failed to acquire partition table: %m");
3502 /* Wipe fs signatures and discard sectors where the new partitions are going to be placed and in the
3503 * gaps between partitions, just to be sure. */
3504 r
= context_wipe_and_discard(context
, from_scratch
);
3508 r
= context_copy_blocks(context
);
3512 r
= context_mkfs(context
);
3516 r
= context_mangle_partitions(context
);
3520 log_info("Writing new partition table.");
3522 r
= fdisk_write_disklabel(context
->fdisk_context
);
3524 return log_error_errno(r
, "Failed to write partition table: %m");
3526 capable
= blockdev_partscan_enabled(fdisk_get_devfd(context
->fdisk_context
));
3527 if (capable
== -ENOTBLK
)
3528 log_debug("Not telling kernel to reread partition table, since we are not operating on a block device.");
3529 else if (capable
< 0)
3530 return log_error_errno(capable
, "Failed to check if block device supports partition scanning: %m");
3531 else if (capable
> 0) {
3532 log_info("Telling kernel to reread partition table.");
3535 r
= fdisk_reread_partition_table(context
->fdisk_context
);
3537 r
= fdisk_reread_changes(context
->fdisk_context
, original_table
);
3539 return log_error_errno(r
, "Failed to reread partition table: %m");
3541 log_notice("Not telling kernel to reread partition table, because selected image does not support kernel partition block devices.");
3543 log_info("All done.");
3548 static int context_read_seed(Context
*context
, const char *root
) {
3553 if (!sd_id128_is_null(context
->seed
))
3556 if (!arg_randomize
) {
3557 _cleanup_close_
int fd
= -1;
3559 fd
= chase_symlinks_and_open("/etc/machine-id", root
, CHASE_PREFIX_ROOT
, O_RDONLY
|O_CLOEXEC
, NULL
);
3561 log_info("No machine ID set, using randomized partition UUIDs.");
3563 return log_error_errno(fd
, "Failed to determine machine ID of image: %m");
3565 r
= id128_read_fd(fd
, ID128_PLAIN_OR_UNINIT
, &context
->seed
);
3566 if (r
== -ENOMEDIUM
)
3567 log_info("No machine ID set, using randomized partition UUIDs.");
3569 return log_error_errno(r
, "Failed to parse machine ID of image: %m");
3575 r
= sd_id128_randomize(&context
->seed
);
3577 return log_error_errno(r
, "Failed to generate randomized seed: %m");
3582 static int context_factory_reset(Context
*context
, bool from_scratch
) {
3588 if (arg_factory_reset
<= 0)
3591 if (from_scratch
) /* Nothing to reset if we start from scratch */
3595 log_notice("Refusing to factory reset, please re-run with --dry-run=no.");
3599 log_info("Applying factory reset.");
3601 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3603 if (!p
->factory_reset
|| !PARTITION_EXISTS(p
))
3606 assert(p
->partno
!= UINT64_MAX
);
3608 log_info("Removing partition %" PRIu64
" for factory reset.", p
->partno
);
3610 r
= fdisk_delete_partition(context
->fdisk_context
, p
->partno
);
3612 return log_error_errno(r
, "Failed to remove partition %" PRIu64
": %m", p
->partno
);
3618 log_info("Factory reset requested, but no partitions to delete found.");
3622 r
= fdisk_write_disklabel(context
->fdisk_context
);
3624 return log_error_errno(r
, "Failed to write disk label: %m");
3626 log_info("Successfully deleted %zu partitions.", n
);
3630 static int context_can_factory_reset(Context
*context
) {
3633 LIST_FOREACH(partitions
, p
, context
->partitions
)
3634 if (p
->factory_reset
&& PARTITION_EXISTS(p
))
3640 static int resolve_copy_blocks_auto_candidate(
3641 dev_t partition_devno
,
3642 sd_id128_t partition_type_uuid
,
3643 dev_t restrict_devno
,
3644 sd_id128_t
*ret_uuid
) {
3646 _cleanup_(blkid_free_probep
) blkid_probe b
= NULL
;
3647 _cleanup_free_
char *p
= NULL
;
3648 _cleanup_close_
int fd
= -1;
3649 const char *pttype
, *t
;
3650 sd_id128_t pt_parsed
, u
;
3657 /* Checks if the specified partition has the specified GPT type UUID, and is located on the specified
3658 * 'restrict_devno' device. The type check is particularly relevant if we have Verity volume which is
3659 * backed by two separate partitions: the data and the hash partitions, and we need to find the right
3660 * one of the two. */
3662 r
= block_get_whole_disk(partition_devno
, &whole_devno
);
3664 return log_error_errno(
3666 "Unable to determine containing block device of partition %u:%u: %m",
3667 major(partition_devno
), minor(partition_devno
));
3669 if (restrict_devno
!= (dev_t
) -1 &&
3670 restrict_devno
!= whole_devno
)
3671 return log_error_errno(
3672 SYNTHETIC_ERRNO(EPERM
),
3673 "Partition %u:%u is located outside of block device %u:%u, refusing.",
3674 major(partition_devno
), minor(partition_devno
),
3675 major(restrict_devno
), minor(restrict_devno
));
3677 r
= device_path_make_major_minor(S_IFBLK
, whole_devno
, &p
);
3679 return log_error_errno(r
, "Failed to convert block device to device node path: %m");
3681 fd
= open(p
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
);
3683 return log_error_errno(r
, "Failed to open '%s': %m", p
);
3685 if (fstat(fd
, &st
) < 0)
3686 return log_error_errno(r
, "Failed to stat '%s': %m", p
);
3688 if (!S_ISBLK(st
.st_mode
) || st
.st_rdev
!= whole_devno
)
3689 return log_error_errno(
3690 SYNTHETIC_ERRNO(EPERM
),
3691 "Opened and determined block device don't match, refusing.");
3693 b
= blkid_new_probe();
3698 r
= blkid_probe_set_device(b
, fd
, 0, 0);
3700 return log_error_errno(errno_or_else(ENOMEM
), "Failed to open block device '%s': %m", p
);
3702 (void) blkid_probe_enable_partitions(b
, 1);
3703 (void) blkid_probe_set_partitions_flags(b
, BLKID_PARTS_ENTRY_DETAILS
);
3706 r
= blkid_do_safeprobe(b
);
3707 if (IN_SET(r
, -2, 1)) { /* nothing found or ambiguous result */
3708 log_debug("Didn't find partition table on block device '%s'.", p
);
3712 return log_error_errno(errno_or_else(EIO
), "Unable to probe for partition table of '%s': %m", p
);
3714 (void) blkid_probe_lookup_value(b
, "PTTYPE", &pttype
, NULL
);
3715 if (!streq_ptr(pttype
, "gpt")) {
3716 log_debug("Didn't find a GPT partition table on '%s'.", p
);
3721 pl
= blkid_probe_get_partitions(b
);
3723 return log_error_errno(errno_or_else(EIO
), "Unable read partition table of '%s': %m", p
);
3726 pp
= blkid_partlist_devno_to_partition(pl
, partition_devno
);
3728 log_debug("Partition %u:%u has no matching partition table entry on '%s'.",
3729 major(partition_devno
), minor(partition_devno
), p
);
3733 t
= blkid_partition_get_type_string(pp
);
3735 log_debug("Partition %u:%u has no type on '%s'.",
3736 major(partition_devno
), minor(partition_devno
), p
);
3740 r
= sd_id128_from_string(t
, &pt_parsed
);
3742 log_debug_errno(r
, "Failed to parse partition type \"%s\": %m", t
);
3746 if (!sd_id128_equal(pt_parsed
, partition_type_uuid
)) {
3747 log_debug("Partition %u:%u has non-matching partition type " SD_ID128_FORMAT_STR
" (needed: " SD_ID128_FORMAT_STR
"), ignoring.",
3748 major(partition_devno
), minor(partition_devno
),
3749 SD_ID128_FORMAT_VAL(pt_parsed
), SD_ID128_FORMAT_VAL(partition_type_uuid
));
3753 t
= blkid_partition_get_uuid(pp
);
3755 log_debug("Partition %u:%u has no UUID.",
3756 major(partition_devno
), minor(partition_devno
));
3760 r
= sd_id128_from_string(t
, &u
);
3762 log_debug_errno(r
, "Failed to parse partition UUID \"%s\": %m", t
);
3766 log_debug("Automatically found partition %u:%u of right type " SD_ID128_FORMAT_STR
".",
3767 major(partition_devno
), minor(partition_devno
),
3768 SD_ID128_FORMAT_VAL(pt_parsed
));
3776 static int find_backing_devno(
3781 _cleanup_free_
char *resolved
= NULL
;
3786 r
= chase_symlinks(path
, root
, CHASE_PREFIX_ROOT
, &resolved
, NULL
);
3790 r
= path_is_mount_point(resolved
, NULL
, 0);
3793 if (r
== 0) /* Not a mount point, then it's not a partition of its own, let's not automatically use it. */
3796 r
= get_block_device(resolved
, ret
);
3799 if (r
== 0) /* Not backed by physical file system, we can't use this */
3805 static int resolve_copy_blocks_auto(
3806 sd_id128_t type_uuid
,
3808 dev_t restrict_devno
,
3810 sd_id128_t
*ret_uuid
) {
3812 const char *try1
= NULL
, *try2
= NULL
;
3813 char p
[SYS_BLOCK_PATH_MAX("/slaves")];
3814 _cleanup_(closedirp
) DIR *d
= NULL
;
3815 sd_id128_t found_uuid
= SD_ID128_NULL
;
3816 dev_t devno
, found
= 0;
3821 /* Enforce some security restrictions: CopyBlocks=auto should not be an avenue to get outside of the
3822 * --root=/--image= confinement. Specifically, refuse CopyBlocks= in combination with --root= at all,
3823 * and restrict block device references in the --image= case to loopback block device we set up.
3825 * restrict_devno contain the dev_t of the loop back device we operate on in case of --image=, and
3826 * thus declares which device (and its partition subdevices) we shall limit access to. If
3827 * restrict_devno is zero no device probing access shall be allowed at all (used for --root=) and if
3828 * it is (dev_t) -1 then free access shall be allowed (if neither switch is used). */
3830 if (restrict_devno
== 0)
3831 return log_error_errno(SYNTHETIC_ERRNO(EPERM
),
3832 "Automatic discovery of backing block devices not permitted in --root= mode, refusing.");
3834 /* Handles CopyBlocks=auto, and finds the right source partition to copy from. We look for matching
3835 * partitions in the host, using the appropriate directory as key and ensuring that the partition
3838 if (gpt_partition_type_is_root(type_uuid
))
3840 else if (gpt_partition_type_is_usr(type_uuid
))
3842 else if (gpt_partition_type_is_root_verity(type_uuid
))
3844 else if (gpt_partition_type_is_usr_verity(type_uuid
))
3846 else if (sd_id128_equal(type_uuid
, GPT_ESP
)) {
3849 } else if (sd_id128_equal(type_uuid
, GPT_XBOOTLDR
))
3852 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
),
3853 "Partition type " SD_ID128_FORMAT_STR
" not supported from automatic source block device discovery.",
3854 SD_ID128_FORMAT_VAL(type_uuid
));
3856 r
= find_backing_devno(try1
, root
, &devno
);
3857 if (r
== -ENOENT
&& try2
)
3858 r
= find_backing_devno(try2
, root
, &devno
);
3860 return log_error_errno(r
, "Failed to resolve automatic CopyBlocks= path for partition type " SD_ID128_FORMAT_STR
", sorry: %m",
3861 SD_ID128_FORMAT_VAL(type_uuid
));
3863 xsprintf_sys_block_path(p
, "/slaves", devno
);
3869 _cleanup_free_
char *q
= NULL
, *t
= NULL
;
3874 de
= readdir_no_dot(d
);
3877 return log_error_errno(errno
, "Failed to read directory '%s': %m", p
);
3882 if (!IN_SET(de
->d_type
, DT_LNK
, DT_UNKNOWN
))
3885 q
= path_join(p
, de
->d_name
, "/dev");
3889 r
= read_one_line_file(q
, &t
);
3891 return log_error_errno(r
, "Failed to read %s: %m", q
);
3893 r
= parse_dev(t
, &sl
);
3895 log_debug_errno(r
, "Failed to parse %s, ignoring: %m", q
);
3898 if (major(sl
) == 0) {
3899 log_debug_errno(r
, "Device backing %s is special, ignoring: %m", q
);
3903 r
= resolve_copy_blocks_auto_candidate(sl
, type_uuid
, restrict_devno
, &u
);
3907 /* We found a matching one! */
3909 return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ
),
3910 "Multiple matching partitions found, refusing.");
3916 } else if (errno
!= ENOENT
)
3917 return log_error_errno(errno
, "Failed open %s: %m", p
);
3919 r
= resolve_copy_blocks_auto_candidate(devno
, type_uuid
, restrict_devno
, &found_uuid
);
3927 return log_error_errno(SYNTHETIC_ERRNO(ENXIO
),
3928 "Unable to automatically discover suitable partition to copy blocks from.");
3930 r
= device_path_make_major_minor(S_IFBLK
, found
, ret_path
);
3932 return log_error_errno(r
, "Failed to convert dev_t to device node path: %m");
3935 *ret_uuid
= found_uuid
;
3940 static int context_open_copy_block_paths(
3943 dev_t restrict_devno
) {
3949 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3950 _cleanup_close_
int source_fd
= -1;
3951 _cleanup_free_
char *opened
= NULL
;
3952 sd_id128_t uuid
= SD_ID128_NULL
;
3956 assert(p
->copy_blocks_fd
< 0);
3957 assert(p
->copy_blocks_size
== UINT64_MAX
);
3959 if (PARTITION_EXISTS(p
)) /* Never copy over partitions that already exist! */
3962 if (p
->copy_blocks_path
) {
3964 source_fd
= chase_symlinks_and_open(p
->copy_blocks_path
, root
, CHASE_PREFIX_ROOT
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
, &opened
);
3966 return log_error_errno(source_fd
, "Failed to open '%s': %m", p
->copy_blocks_path
);
3968 if (fstat(source_fd
, &st
) < 0)
3969 return log_error_errno(errno
, "Failed to stat block copy file '%s': %m", opened
);
3971 if (!S_ISREG(st
.st_mode
) && restrict_devno
!= (dev_t
) -1)
3972 return log_error_errno(SYNTHETIC_ERRNO(EPERM
),
3973 "Copying from block device node is not permitted in --image=/--root= mode, refusing.");
3975 } else if (p
->copy_blocks_auto
) {
3977 r
= resolve_copy_blocks_auto(p
->type_uuid
, root
, restrict_devno
, &opened
, &uuid
);
3981 source_fd
= open(opened
, O_RDONLY
|O_CLOEXEC
|O_NOCTTY
);
3983 return log_error_errno(errno
, "Failed to open automatically determined source block copy device '%s': %m", opened
);
3985 if (fstat(source_fd
, &st
) < 0)
3986 return log_error_errno(errno
, "Failed to stat block copy file '%s': %m", opened
);
3988 /* If we found it automatically, it must be a block device, let's enforce that */
3989 if (!S_ISBLK(st
.st_mode
))
3990 return log_error_errno(SYNTHETIC_ERRNO(EBADF
),
3991 "Automatically detected source block copy device '%s' is not a block device, refusing: %m", opened
);
3995 if (S_ISDIR(st
.st_mode
)) {
3996 _cleanup_free_
char *bdev
= NULL
;
3998 /* If the file is a directory, automatically find the backing block device */
4000 if (major(st
.st_dev
) != 0)
4001 r
= device_path_make_major_minor(S_IFBLK
, st
.st_dev
, &bdev
);
4005 /* Special support for btrfs */
4007 r
= btrfs_get_block_device_fd(source_fd
, &devt
);
4009 return btrfs_log_dev_root(LOG_ERR
, r
, opened
);
4011 return log_error_errno(r
, "Unable to determine backing block device of '%s': %m", opened
);
4013 r
= device_path_make_major_minor(S_IFBLK
, devt
, &bdev
);
4016 return log_error_errno(r
, "Failed to determine block device path for block device backing '%s': %m", opened
);
4018 safe_close(source_fd
);
4020 source_fd
= open(bdev
, O_RDONLY
|O_CLOEXEC
|O_NOCTTY
);
4022 return log_error_errno(errno
, "Failed to open block device '%s': %m", bdev
);
4024 if (fstat(source_fd
, &st
) < 0)
4025 return log_error_errno(errno
, "Failed to stat block device '%s': %m", bdev
);
4027 if (!S_ISBLK(st
.st_mode
))
4028 return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK
), "Block device '%s' is not actually a block device, refusing.", bdev
);
4031 if (S_ISREG(st
.st_mode
))
4033 else if (S_ISBLK(st
.st_mode
)) {
4034 if (ioctl(source_fd
, BLKGETSIZE64
, &size
) != 0)
4035 return log_error_errno(errno
, "Failed to determine size of block device to copy from: %m");
4037 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Specified path to copy blocks from '%s' is not a regular file, block device or directory, refusing: %m", opened
);
4040 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "File to copy bytes from '%s' has zero size, refusing.", opened
);
4041 if (size
% 512 != 0)
4042 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "File to copy bytes from '%s' has size that is not multiple of 512, refusing.", opened
);
4044 p
->copy_blocks_fd
= TAKE_FD(source_fd
);
4045 p
->copy_blocks_size
= size
;
4047 free_and_replace(p
->copy_blocks_path
, opened
);
4049 /* When copying from an existing partition copy that partitions UUID if none is configured explicitly */
4050 if (sd_id128_is_null(p
->new_uuid
) && !sd_id128_is_null(uuid
))
4057 static int help(void) {
4058 _cleanup_free_
char *link
= NULL
;
4061 r
= terminal_urlify_man("systemd-repart", "1", &link
);
4065 printf("%s [OPTIONS...] [DEVICE]\n"
4066 "\n%sGrow and add partitions to partition table.%s\n\n"
4067 " -h --help Show this help\n"
4068 " --version Show package version\n"
4069 " --no-pager Do not pipe output into a pager\n"
4070 " --no-legend Do not show the headers and footers\n"
4071 " --dry-run=BOOL Whether to run dry-run operation\n"
4072 " --empty=MODE One of refuse, allow, require, force, create; controls\n"
4073 " how to handle empty disks lacking partition tables\n"
4074 " --discard=BOOL Whether to discard backing blocks for new partitions\n"
4075 " --pretty=BOOL Whether to show pretty summary before doing changes\n"
4076 " --factory-reset=BOOL Whether to remove data partitions before recreating\n"
4078 " --can-factory-reset Test whether factory reset is defined\n"
4079 " --root=PATH Operate relative to root path\n"
4080 " --image=PATH Operate relative to image file\n"
4081 " --definitions=DIR Find partition definitions in specified directory\n"
4082 " --key-file=PATH Key to use when encrypting partitions\n"
4083 " --tpm2-device=PATH Path to TPM2 device node to use\n"
4084 " --tpm2-pcrs=PCR1+PCR2+PCR3+…\n"
4085 " TPM2 PCR indexes to use for TPM2 enrollment\n"
4086 " --seed=UUID 128bit seed UUID to derive all UUIDs from\n"
4087 " --size=BYTES Grow loopback file to specified size\n"
4088 " --json=pretty|short|off\n"
4089 " Generate JSON output\n"
4090 "\nSee the %s for details.\n",
4091 program_invocation_short_name
,
4099 static int parse_argv(int argc
, char *argv
[]) {
4102 ARG_VERSION
= 0x100,
4109 ARG_CAN_FACTORY_RESET
,
4122 static const struct option options
[] = {
4123 { "help", no_argument
, NULL
, 'h' },
4124 { "version", no_argument
, NULL
, ARG_VERSION
},
4125 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
4126 { "no-legend", no_argument
, NULL
, ARG_NO_LEGEND
},
4127 { "dry-run", required_argument
, NULL
, ARG_DRY_RUN
},
4128 { "empty", required_argument
, NULL
, ARG_EMPTY
},
4129 { "discard", required_argument
, NULL
, ARG_DISCARD
},
4130 { "factory-reset", required_argument
, NULL
, ARG_FACTORY_RESET
},
4131 { "can-factory-reset", no_argument
, NULL
, ARG_CAN_FACTORY_RESET
},
4132 { "root", required_argument
, NULL
, ARG_ROOT
},
4133 { "image", required_argument
, NULL
, ARG_IMAGE
},
4134 { "seed", required_argument
, NULL
, ARG_SEED
},
4135 { "pretty", required_argument
, NULL
, ARG_PRETTY
},
4136 { "definitions", required_argument
, NULL
, ARG_DEFINITIONS
},
4137 { "size", required_argument
, NULL
, ARG_SIZE
},
4138 { "json", required_argument
, NULL
, ARG_JSON
},
4139 { "key-file", required_argument
, NULL
, ARG_KEY_FILE
},
4140 { "tpm2-device", required_argument
, NULL
, ARG_TPM2_DEVICE
},
4141 { "tpm2-pcrs", required_argument
, NULL
, ARG_TPM2_PCRS
},
4145 int c
, r
, dry_run
= -1;
4150 while ((c
= getopt_long(argc
, argv
, "h", options
, NULL
)) >= 0)
4161 arg_pager_flags
|= PAGER_DISABLE
;
4169 r
= parse_boolean_argument("--dry-run=", optarg
, &arg_dry_run
);
4175 if (isempty(optarg
) || streq(optarg
, "refuse"))
4176 arg_empty
= EMPTY_REFUSE
;
4177 else if (streq(optarg
, "allow"))
4178 arg_empty
= EMPTY_ALLOW
;
4179 else if (streq(optarg
, "require"))
4180 arg_empty
= EMPTY_REQUIRE
;
4181 else if (streq(optarg
, "force"))
4182 arg_empty
= EMPTY_FORCE
;
4183 else if (streq(optarg
, "create")) {
4184 arg_empty
= EMPTY_CREATE
;
4187 dry_run
= false; /* Imply --dry-run=no if we create the loopback file
4188 * anew. After all we cannot really break anyone's
4189 * partition tables that way. */
4191 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4192 "Failed to parse --empty= parameter: %s", optarg
);
4196 r
= parse_boolean_argument("--discard=", optarg
, &arg_discard
);
4201 case ARG_FACTORY_RESET
:
4202 r
= parse_boolean_argument("--factory-reset=", optarg
, NULL
);
4205 arg_factory_reset
= r
;
4208 case ARG_CAN_FACTORY_RESET
:
4209 arg_can_factory_reset
= true;
4213 r
= parse_path_argument(optarg
, /* suppress_root= */ false, &arg_root
);
4219 r
= parse_path_argument(optarg
, /* suppress_root= */ false, &arg_image
);
4225 if (isempty(optarg
)) {
4226 arg_seed
= SD_ID128_NULL
;
4227 arg_randomize
= false;
4228 } else if (streq(optarg
, "random"))
4229 arg_randomize
= true;
4231 r
= sd_id128_from_string(optarg
, &arg_seed
);
4233 return log_error_errno(r
, "Failed to parse seed: %s", optarg
);
4235 arg_randomize
= false;
4241 r
= parse_boolean_argument("--pretty=", optarg
, NULL
);
4247 case ARG_DEFINITIONS
:
4248 r
= parse_path_argument(optarg
, false, &arg_definitions
);
4254 uint64_t parsed
, rounded
;
4256 if (streq(optarg
, "auto")) {
4257 arg_size
= UINT64_MAX
;
4258 arg_size_auto
= true;
4262 r
= parse_size(optarg
, 1024, &parsed
);
4264 return log_error_errno(r
, "Failed to parse --size= parameter: %s", optarg
);
4266 rounded
= round_up_size(parsed
, 4096);
4268 return log_error_errno(SYNTHETIC_ERRNO(ERANGE
), "Specified image size too small, refusing.");
4269 if (rounded
== UINT64_MAX
)
4270 return log_error_errno(SYNTHETIC_ERRNO(ERANGE
), "Specified image size too large, refusing.");
4272 if (rounded
!= parsed
)
4273 log_warning("Specified size is not a multiple of 4096, rounding up automatically. (%" PRIu64
" → %" PRIu64
")",
4277 arg_size_auto
= false;
4282 r
= parse_json_argument(optarg
, &arg_json_format_flags
);
4288 case ARG_KEY_FILE
: {
4289 _cleanup_(erase_and_freep
) char *k
= NULL
;
4292 r
= read_full_file_full(
4293 AT_FDCWD
, optarg
, UINT64_MAX
, SIZE_MAX
,
4294 READ_FULL_FILE_SECURE
|READ_FULL_FILE_WARN_WORLD_READABLE
|READ_FULL_FILE_CONNECT_SOCKET
,
4298 return log_error_errno(r
, "Failed to read key file '%s': %m", optarg
);
4300 erase_and_free(arg_key
);
4301 arg_key
= TAKE_PTR(k
);
4306 case ARG_TPM2_DEVICE
: {
4307 _cleanup_free_
char *device
= NULL
;
4309 if (streq(optarg
, "list"))
4310 return tpm2_list_devices();
4312 if (!streq(optarg
, "auto")) {
4313 device
= strdup(optarg
);
4318 free(arg_tpm2_device
);
4319 arg_tpm2_device
= TAKE_PTR(device
);
4323 case ARG_TPM2_PCRS
: {
4326 if (isempty(optarg
)) {
4327 arg_tpm2_pcr_mask
= 0;
4331 r
= tpm2_parse_pcrs(optarg
, &mask
);
4335 if (arg_tpm2_pcr_mask
== UINT32_MAX
)
4336 arg_tpm2_pcr_mask
= mask
;
4338 arg_tpm2_pcr_mask
|= mask
;
4347 assert_not_reached();
4350 if (argc
- optind
> 1)
4351 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4352 "Expected at most one argument, the path to the block device.");
4354 if (arg_factory_reset
> 0 && IN_SET(arg_empty
, EMPTY_FORCE
, EMPTY_REQUIRE
, EMPTY_CREATE
))
4355 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4356 "Combination of --factory-reset=yes and --empty=force/--empty=require/--empty=create is invalid.");
4358 if (arg_can_factory_reset
)
4359 arg_dry_run
= true; /* When --can-factory-reset is specified we don't make changes, hence
4360 * non-dry-run mode makes no sense. Thus, imply dry run mode so that we
4361 * open things strictly read-only. */
4362 else if (dry_run
>= 0)
4363 arg_dry_run
= dry_run
;
4365 if (arg_empty
== EMPTY_CREATE
&& (arg_size
== UINT64_MAX
&& !arg_size_auto
))
4366 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4367 "If --empty=create is specified, --size= must be specified, too.");
4369 if (arg_image
&& arg_root
)
4370 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Please specify either --root= or --image=, the combination of both is not supported.");
4371 else if (!arg_image
&& !arg_root
&& in_initrd()) {
4373 /* By default operate on /sysusr/ or /sysroot/ when invoked in the initrd. We prefer the
4374 * former, if it is mounted, so that we have deterministic behaviour on systems where /usr/
4375 * is vendor-supplied but the root fs formatted on first boot. */
4376 r
= path_is_mount_point("/sysusr/usr", NULL
, 0);
4378 if (r
< 0 && r
!= -ENOENT
)
4379 log_debug_errno(r
, "Unable to determine whether /sysusr/usr is a mount point, assuming it is not: %m");
4381 arg_root
= strdup("/sysroot");
4383 arg_root
= strdup("/sysusr");
4388 arg_node
= argc
> optind
? argv
[optind
] : NULL
;
4390 if (IN_SET(arg_empty
, EMPTY_FORCE
, EMPTY_REQUIRE
, EMPTY_CREATE
) && !arg_node
&& !arg_image
)
4391 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4392 "A path to a device node or loopback file must be specified when --empty=force, --empty=require or --empty=create are used.");
4394 if (arg_tpm2_pcr_mask
== UINT32_MAX
)
4395 arg_tpm2_pcr_mask
= TPM2_PCR_MASK_DEFAULT
;
4400 static int parse_proc_cmdline_factory_reset(void) {
4404 if (arg_factory_reset
>= 0) /* Never override what is specified on the process command line */
4407 if (!in_initrd()) /* Never honour kernel command line factory reset request outside of the initrd */
4410 r
= proc_cmdline_get_bool("systemd.factory_reset", &b
);
4412 return log_error_errno(r
, "Failed to parse systemd.factory_reset kernel command line argument: %m");
4414 arg_factory_reset
= b
;
4417 log_notice("Honouring factory reset requested via kernel command line.");
4423 static int parse_efi_variable_factory_reset(void) {
4424 _cleanup_free_
char *value
= NULL
;
4427 if (arg_factory_reset
>= 0) /* Never override what is specified on the process command line */
4430 if (!in_initrd()) /* Never honour EFI variable factory reset request outside of the initrd */
4433 r
= efi_get_variable_string(EFI_SYSTEMD_VARIABLE(FactoryReset
), &value
);
4434 if (r
== -ENOENT
|| ERRNO_IS_NOT_SUPPORTED(r
))
4437 return log_error_errno(r
, "Failed to read EFI variable FactoryReset: %m");
4439 r
= parse_boolean(value
);
4441 return log_error_errno(r
, "Failed to parse EFI variable FactoryReset: %m");
4443 arg_factory_reset
= r
;
4445 log_notice("Factory reset requested via EFI variable FactoryReset.");
4450 static int remove_efi_variable_factory_reset(void) {
4453 r
= efi_set_variable(EFI_SYSTEMD_VARIABLE(FactoryReset
), NULL
, 0);
4454 if (r
== -ENOENT
|| ERRNO_IS_NOT_SUPPORTED(r
))
4457 return log_error_errno(r
, "Failed to remove EFI variable FactoryReset: %m");
4459 log_info("Successfully unset EFI variable FactoryReset.");
4463 static int acquire_root_devno(
4470 _cleanup_free_
char *found_path
= NULL
;
4471 dev_t devno
, fd_devno
= MODE_INVALID
;
4472 _cleanup_close_
int fd
= -1;
4480 fd
= chase_symlinks_and_open(p
, root
, CHASE_PREFIX_ROOT
, mode
, &found_path
);
4484 if (fstat(fd
, &st
) < 0)
4487 if (S_ISREG(st
.st_mode
)) {
4488 *ret
= TAKE_PTR(found_path
);
4489 *ret_fd
= TAKE_FD(fd
);
4493 if (S_ISBLK(st
.st_mode
)) {
4494 /* Refuse referencing explicit block devices if a root dir is specified, after all we should
4495 * not be able to leave the image the root path constrains us to. */
4499 fd_devno
= devno
= st
.st_rdev
;
4500 } else if (S_ISDIR(st
.st_mode
)) {
4503 if (major(devno
) == 0) {
4504 r
= btrfs_get_block_device_fd(fd
, &devno
);
4505 if (r
== -ENOTTY
) /* not btrfs */
4513 /* From dm-crypt to backing partition */
4514 r
= block_get_originating(devno
, &devno
);
4516 log_debug_errno(r
, "Device '%s' has no dm-crypt/dm-verity device, no need to look for underlying block device.", p
);
4518 log_debug_errno(r
, "Failed to find underlying block device for '%s', ignoring: %m", p
);
4520 /* From partition to whole disk containing it */
4521 r
= block_get_whole_disk(devno
, &devno
);
4523 log_debug_errno(r
, "Failed to find whole disk block device for '%s', ignoring: %m", p
);
4525 r
= device_path_make_canonical(S_IFBLK
, devno
, ret
);
4527 return log_debug_errno(r
, "Failed to determine canonical path for '%s': %m", p
);
4529 /* Only if we still look at the same block device we can reuse the fd. Otherwise return an
4530 * invalidated fd. */
4531 *ret_fd
= fd_devno
!= MODE_INVALID
&& fd_devno
== devno
? TAKE_FD(fd
) : -1;
4535 static int find_root(char **ret
, int *ret_fd
) {
4538 _cleanup_free_
char *device
= NULL
;
4544 if (arg_empty
== EMPTY_CREATE
) {
4545 _cleanup_close_
int fd
= -1;
4546 _cleanup_free_
char *s
= NULL
;
4548 s
= strdup(arg_node
);
4552 fd
= open(arg_node
, O_RDONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
|O_NOFOLLOW
, 0666);
4554 return log_error_errno(errno
, "Failed to create '%s': %m", arg_node
);
4557 *ret_fd
= TAKE_FD(fd
);
4561 /* Note that we don't specify a root argument here: if the user explicitly configured a node
4562 * we'll take it relative to the host, not the image */
4563 r
= acquire_root_devno(arg_node
, NULL
, O_RDONLY
|O_CLOEXEC
, ret
, ret_fd
);
4565 return btrfs_log_dev_root(LOG_ERR
, r
, arg_node
);
4567 return log_error_errno(r
, "Failed to open file or determine backing device of %s: %m", arg_node
);
4572 assert(IN_SET(arg_empty
, EMPTY_REFUSE
, EMPTY_ALLOW
));
4574 /* If the root mount has been replaced by some form of volatile file system (overlayfs), the
4575 * original root block device node is symlinked in /run/systemd/volatile-root. Let's read that
4577 r
= readlink_malloc("/run/systemd/volatile-root", &device
);
4578 if (r
== -ENOENT
) { /* volatile-root not found */
4579 /* Let's search for the root device. We look for two cases here: first in /, and then in /usr. The
4580 * latter we check for cases where / is a tmpfs and only /usr is an actual persistent block device
4581 * (think: volatile setups) */
4583 FOREACH_STRING(p
, "/", "/usr") {
4585 r
= acquire_root_devno(p
, arg_root
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, ret
, ret_fd
);
4588 return btrfs_log_dev_root(LOG_ERR
, r
, p
);
4590 return log_error_errno(r
, "Failed to determine backing device of %s: %m", p
);
4595 return log_error_errno(r
, "Failed to read symlink /run/systemd/volatile-root: %m");
4597 r
= acquire_root_devno(device
, NULL
, O_RDONLY
|O_CLOEXEC
, ret
, ret_fd
);
4599 return btrfs_log_dev_root(LOG_ERR
, r
, device
);
4601 return log_error_errno(r
, "Failed to open file or determine backing device of %s: %m", device
);
4606 return log_error_errno(SYNTHETIC_ERRNO(ENODEV
), "Failed to discover root block device.");
4609 static int resize_pt(int fd
) {
4610 _cleanup_(fdisk_unref_contextp
) struct fdisk_context
*c
= NULL
;
4613 /* After resizing the backing file we need to resize the partition table itself too, so that it takes
4614 * possession of the enlarged backing file. For this it suffices to open the device with libfdisk and
4615 * immediately write it again, with no changes. */
4617 c
= fdisk_new_context();
4621 r
= fdisk_assign_device(c
, FORMAT_PROC_FD_PATH(fd
), 0);
4623 return log_error_errno(r
, "Failed to open device '%s': %m", FORMAT_PROC_FD_PATH(fd
));
4625 r
= fdisk_has_label(c
);
4627 return log_error_errno(r
, "Failed to determine whether disk '%s' has a disk label: %m", FORMAT_PROC_FD_PATH(fd
));
4629 log_debug("Not resizing partition table, as there currently is none.");
4633 r
= fdisk_write_disklabel(c
);
4635 return log_error_errno(r
, "Failed to write resized partition table: %m");
4637 log_info("Resized partition table.");
4641 static int resize_backing_fd(
4642 const char *node
, /* The primary way we access the disk image to operate on */
4643 int *fd
, /* An O_RDONLY fd referring to that inode */
4644 const char *backing_file
, /* If the above refers to a loopback device, the backing regular file for that, which we can grow */
4645 LoopDevice
*loop_device
) {
4647 _cleanup_close_
int writable_fd
= -1;
4648 uint64_t current_size
;
4655 if (arg_size
== UINT64_MAX
) /* Nothing to do */
4659 /* Open the file if we haven't opened it yet. Note that we open it read-only here, just to
4660 * keep a reference to the file we can pass around. */
4661 *fd
= open(node
, O_RDONLY
|O_CLOEXEC
);
4663 return log_error_errno(errno
, "Failed to open '%s' in order to adjust size: %m", node
);
4666 if (fstat(*fd
, &st
) < 0)
4667 return log_error_errno(errno
, "Failed to stat '%s': %m", node
);
4669 if (S_ISBLK(st
.st_mode
)) {
4671 return log_error_errno(SYNTHETIC_ERRNO(EBADF
), "Cannot resize block device '%s'.", node
);
4673 assert(loop_device
);
4675 if (ioctl(*fd
, BLKGETSIZE64
, ¤t_size
) < 0)
4676 return log_error_errno(errno
, "Failed to determine size of block device %s: %m", node
);
4678 r
= stat_verify_regular(&st
);
4680 return log_error_errno(r
, "Specified path '%s' is not a regular file or loopback block device, cannot resize: %m", node
);
4682 assert(!backing_file
);
4683 assert(!loop_device
);
4684 current_size
= st
.st_size
;
4687 if (current_size
>= arg_size
) {
4688 log_info("File '%s' already is of requested size or larger, not growing. (%s >= %s)",
4689 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4693 if (S_ISBLK(st
.st_mode
)) {
4694 assert(backing_file
);
4696 /* This is a loopback device. We can't really grow those directly, but we can grow the
4697 * backing file, hence let's do that. */
4699 writable_fd
= open(backing_file
, O_WRONLY
|O_CLOEXEC
|O_NONBLOCK
);
4700 if (writable_fd
< 0)
4701 return log_error_errno(errno
, "Failed to open backing file '%s': %m", backing_file
);
4703 if (fstat(writable_fd
, &st
) < 0)
4704 return log_error_errno(errno
, "Failed to stat() backing file '%s': %m", backing_file
);
4706 r
= stat_verify_regular(&st
);
4708 return log_error_errno(r
, "Backing file '%s' of block device is not a regular file: %m", backing_file
);
4710 if ((uint64_t) st
.st_size
!= current_size
)
4711 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4712 "Size of backing file '%s' of loopback block device '%s' don't match, refusing.",
4713 node
, backing_file
);
4715 assert(S_ISREG(st
.st_mode
));
4716 assert(!backing_file
);
4718 /* The file descriptor is read-only. In order to grow the file we need to have a writable fd. We
4719 * reopen the file for that temporarily. We keep the writable fd only open for this operation though,
4720 * as fdisk can't accept it anyway. */
4722 writable_fd
= fd_reopen(*fd
, O_WRONLY
|O_CLOEXEC
);
4723 if (writable_fd
< 0)
4724 return log_error_errno(writable_fd
, "Failed to reopen backing file '%s' writable: %m", node
);
4728 if (fallocate(writable_fd
, 0, 0, arg_size
) < 0) {
4729 if (!ERRNO_IS_NOT_SUPPORTED(errno
))
4730 return log_error_errno(errno
, "Failed to grow '%s' from %s to %s by allocation: %m",
4731 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4733 /* Fallback to truncation, if fallocate() is not supported. */
4734 log_debug("Backing file system does not support fallocate(), falling back to ftruncate().");
4736 if (current_size
== 0) /* Likely regular file just created by us */
4737 log_info("Allocated %s for '%s'.", FORMAT_BYTES(arg_size
), node
);
4739 log_info("File '%s' grown from %s to %s by allocation.",
4740 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4746 if (ftruncate(writable_fd
, arg_size
) < 0)
4747 return log_error_errno(errno
, "Failed to grow '%s' from %s to %s by truncation: %m",
4748 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4750 if (current_size
== 0) /* Likely regular file just created by us */
4751 log_info("Sized '%s' to %s.", node
, FORMAT_BYTES(arg_size
));
4753 log_info("File '%s' grown from %s to %s by truncation.",
4754 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4757 r
= resize_pt(writable_fd
);
4762 r
= loop_device_refresh_size(loop_device
, UINT64_MAX
, arg_size
);
4764 return log_error_errno(r
, "Failed to update loop device size: %m");
4770 static int determine_auto_size(Context
*c
) {
4775 sum
= round_up_size(GPT_METADATA_SIZE
, 4096);
4777 LIST_FOREACH(partitions
, p
, c
->partitions
) {
4783 m
= partition_min_size_with_padding(c
, p
);
4784 if (m
> UINT64_MAX
- sum
)
4785 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Image would grow too large, refusing.");
4790 if (c
->total
!= UINT64_MAX
)
4791 /* Image already allocated? Then show its size. */
4792 log_info("Automatically determined minimal disk image size as %s, current image size is %s.",
4793 FORMAT_BYTES(sum
), FORMAT_BYTES(c
->total
));
4795 /* If the image is being created right now, then it has no previous size, suppress any comment about it hence. */
4796 log_info("Automatically determined minimal disk image size as %s.",
4803 static int run(int argc
, char *argv
[]) {
4804 _cleanup_(loop_device_unrefp
) LoopDevice
*loop_device
= NULL
;
4805 _cleanup_(decrypted_image_unrefp
) DecryptedImage
*decrypted_image
= NULL
;
4806 _cleanup_(umount_and_rmdir_and_freep
) char *mounted_dir
= NULL
;
4807 _cleanup_(context_freep
) Context
* context
= NULL
;
4808 _cleanup_free_
char *node
= NULL
;
4809 _cleanup_close_
int backing_fd
= -1;
4810 bool from_scratch
, node_is_our_loop
= false;
4813 log_show_color(true);
4814 log_parse_environment();
4817 r
= parse_argv(argc
, argv
);
4821 r
= parse_proc_cmdline_factory_reset();
4825 r
= parse_efi_variable_factory_reset();
4829 #if HAVE_LIBCRYPTSETUP
4830 cryptsetup_enable_logging(NULL
);
4836 /* Mount this strictly read-only: we shall modify the partition table, not the file
4838 r
= mount_image_privately_interactively(
4840 DISSECT_IMAGE_MOUNT_READ_ONLY
|
4841 (arg_node
? DISSECT_IMAGE_DEVICE_READ_ONLY
: 0) | /* If a different node to make changes to is specified let's open the device in read-only mode) */
4842 DISSECT_IMAGE_GPT_ONLY
|
4843 DISSECT_IMAGE_RELAX_VAR_CHECK
|
4844 DISSECT_IMAGE_USR_NO_ROOT
|
4845 DISSECT_IMAGE_REQUIRE_ROOT
,
4852 arg_root
= strdup(mounted_dir
);
4857 arg_node
= strdup(loop_device
->node
);
4861 /* Remember that the device we are about to manipulate is actually the one we
4862 * allocated here, and thus to increase its backing file we know what to do */
4863 node_is_our_loop
= true;
4867 context
= context_new(arg_seed
);
4871 r
= context_read_definitions(context
, arg_definitions
, arg_root
);
4875 if (context
->n_partitions
<= 0 && arg_empty
== EMPTY_REFUSE
) {
4876 log_info("Didn't find any partition definition files, nothing to do.");
4880 r
= find_root(&node
, &backing_fd
);
4884 if (arg_size
!= UINT64_MAX
) {
4885 r
= resize_backing_fd(
4888 node_is_our_loop
? arg_image
: NULL
,
4889 node_is_our_loop
? loop_device
: NULL
);
4894 r
= context_load_partition_table(context
, node
, &backing_fd
);
4895 if (r
== -EHWPOISON
)
4896 return 77; /* Special return value which means "Not GPT, so not doing anything". This isn't
4897 * really an error when called at boot. */
4900 from_scratch
= r
> 0; /* Starting from scratch */
4902 if (arg_can_factory_reset
) {
4903 r
= context_can_factory_reset(context
);
4907 return EXIT_FAILURE
;
4912 r
= context_factory_reset(context
, from_scratch
);
4916 /* We actually did a factory reset! */
4917 r
= remove_efi_variable_factory_reset();
4921 /* Reload the reduced partition table */
4922 context_unload_partition_table(context
);
4923 r
= context_load_partition_table(context
, node
, &backing_fd
);
4929 (void) context_dump_partitions(context
, node
);
4933 r
= context_read_seed(context
, arg_root
);
4937 /* Open all files to copy blocks from now, since we want to take their size into consideration */
4938 r
= context_open_copy_block_paths(
4941 loop_device
? loop_device
->devno
: /* if --image= is specified, only allow partitions on the loopback device */
4942 arg_root
&& !arg_image
? 0 : /* if --root= is specified, don't accept any block device */
4943 (dev_t
) -1); /* if neither is specified, make no restrictions */
4947 if (arg_size_auto
) {
4948 r
= determine_auto_size(context
);
4952 /* Flush out everything again, and let's grow the file first, then start fresh */
4953 context_unload_partition_table(context
);
4955 assert(arg_size
!= UINT64_MAX
);
4956 r
= resize_backing_fd(
4959 node_is_our_loop
? arg_image
: NULL
,
4960 node_is_our_loop
? loop_device
: NULL
);
4964 r
= context_load_partition_table(context
, node
, &backing_fd
);
4969 /* First try to fit new partitions in, dropping by priority until it fits */
4971 uint64_t largest_free_area
;
4973 if (context_allocate_partitions(context
, &largest_free_area
))
4974 break; /* Success! */
4976 if (!context_drop_one_priority(context
)) {
4977 r
= log_error_errno(SYNTHETIC_ERRNO(ENOSPC
),
4978 "Can't fit requested partitions into available free space (%s), refusing.",
4979 FORMAT_BYTES(largest_free_area
));
4980 determine_auto_size(context
);
4985 /* Now assign free space according to the weight logic */
4986 r
= context_grow_partitions(context
);
4990 /* Now calculate where each new partition gets placed */
4991 context_place_partitions(context
);
4993 /* Make sure each partition has a unique UUID and unique label */
4994 r
= context_acquire_partition_uuids_and_labels(context
);
4998 r
= context_write_partition_table(context
, node
, from_scratch
);
5005 DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run
);