1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 #if HAVE_VALGRIND_MEMCHECK_H
4 #include <valgrind/memcheck.h>
11 #include <linux/loop.h>
13 #include <sys/ioctl.h>
16 #include <openssl/hmac.h>
17 #include <openssl/sha.h>
21 #include "alloc-util.h"
22 #include "blkid-util.h"
23 #include "blockdev-util.h"
24 #include "btrfs-util.h"
25 #include "chase-symlinks.h"
26 #include "conf-files.h"
27 #include "conf-parser.h"
28 #include "cryptsetup-util.h"
30 #include "dirent-util.h"
32 #include "errno-util.h"
35 #include "format-table.h"
36 #include "format-util.h"
38 #include "glyph-util.h"
40 #include "hexdecoct.h"
41 #include "id128-util.h"
44 #include "loop-util.h"
45 #include "main-func.h"
47 #include "mkfs-util.h"
48 #include "mount-util.h"
49 #include "mountpoint-util.h"
50 #include "parse-argument.h"
51 #include "parse-util.h"
52 #include "path-util.h"
53 #include "pretty-print.h"
54 #include "proc-cmdline.h"
55 #include "process-util.h"
56 #include "random-util.h"
57 #include "resize-fs.h"
58 #include "sort-util.h"
59 #include "specifier.h"
60 #include "stat-util.h"
61 #include "stdio-util.h"
62 #include "string-table.h"
63 #include "string-util.h"
65 #include "sync-util.h"
66 #include "terminal-util.h"
67 #include "tpm2-util.h"
68 #include "user-util.h"
71 /* If not configured otherwise use a minimal partition size of 10M */
72 #define DEFAULT_MIN_SIZE (10*1024*1024)
74 /* Hard lower limit for new partition sizes */
75 #define HARD_MIN_SIZE 4096
77 /* libfdisk takes off slightly more than 1M of the disk size when creating a GPT disk label */
78 #define GPT_METADATA_SIZE (1044*1024)
80 /* LUKS2 takes off 16M of the partition size with its metadata by default */
81 #define LUKS2_METADATA_SIZE (16*1024*1024)
83 /* Note: When growing and placing new partitions we always align to 4K sector size. It's how newer hard disks
84 * are designed, and if everything is aligned to that performance is best. And for older hard disks with 512B
85 * sector size devices were generally assumed to have an even number of sectors, hence at the worst we'll
86 * waste 3K per partition, which is probably fine. */
89 EMPTY_REFUSE
, /* refuse empty disks, never create a partition table */
90 EMPTY_ALLOW
, /* allow empty disks, create partition table if necessary */
91 EMPTY_REQUIRE
, /* require an empty disk, create a partition table */
92 EMPTY_FORCE
, /* make disk empty, erase everything, create a partition table always */
93 EMPTY_CREATE
, /* create disk as loopback file, create a partition table always */
94 } arg_empty
= EMPTY_REFUSE
;
96 static bool arg_dry_run
= true;
97 static const char *arg_node
= NULL
;
98 static char *arg_root
= NULL
;
99 static char *arg_image
= NULL
;
100 static char *arg_definitions
= NULL
;
101 static bool arg_discard
= true;
102 static bool arg_can_factory_reset
= false;
103 static int arg_factory_reset
= -1;
104 static sd_id128_t arg_seed
= SD_ID128_NULL
;
105 static bool arg_randomize
= false;
106 static int arg_pretty
= -1;
107 static uint64_t arg_size
= UINT64_MAX
;
108 static bool arg_size_auto
= false;
109 static JsonFormatFlags arg_json_format_flags
= JSON_FORMAT_OFF
;
110 static PagerFlags arg_pager_flags
= 0;
111 static bool arg_legend
= true;
112 static void *arg_key
= NULL
;
113 static size_t arg_key_size
= 0;
114 static char *arg_tpm2_device
= NULL
;
115 static uint32_t arg_tpm2_pcr_mask
= UINT32_MAX
;
117 STATIC_DESTRUCTOR_REGISTER(arg_root
, freep
);
118 STATIC_DESTRUCTOR_REGISTER(arg_image
, freep
);
119 STATIC_DESTRUCTOR_REGISTER(arg_definitions
, freep
);
120 STATIC_DESTRUCTOR_REGISTER(arg_key
, erase_and_freep
);
121 STATIC_DESTRUCTOR_REGISTER(arg_tpm2_device
, freep
);
123 typedef struct Partition Partition
;
124 typedef struct FreeArea FreeArea
;
125 typedef struct Context Context
;
127 typedef enum EncryptMode
{
131 ENCRYPT_KEY_FILE_TPM2
,
133 _ENCRYPT_MODE_INVALID
= -EINVAL
,
137 char *definition_path
;
139 sd_id128_t type_uuid
;
140 sd_id128_t current_uuid
, new_uuid
;
141 char *current_label
, *new_label
;
147 uint32_t weight
, padding_weight
;
149 uint64_t current_size
, new_size
;
150 uint64_t size_min
, size_max
;
152 uint64_t current_padding
, new_padding
;
153 uint64_t padding_min
, padding_max
;
158 struct fdisk_partition
*current_partition
;
159 struct fdisk_partition
*new_partition
;
160 FreeArea
*padding_area
;
161 FreeArea
*allocated_to_area
;
163 char *copy_blocks_path
;
164 bool copy_blocks_auto
;
166 uint64_t copy_blocks_size
;
170 char **make_directories
;
178 LIST_FIELDS(Partition
, partitions
);
181 #define PARTITION_IS_FOREIGN(p) (!(p)->definition_path)
182 #define PARTITION_EXISTS(p) (!!(p)->current_partition)
191 LIST_HEAD(Partition
, partitions
);
194 FreeArea
**free_areas
;
197 uint64_t start
, end
, total
;
199 struct fdisk_context
*fdisk_context
;
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;
379 LIST_FOREACH(partitions
, p
, context
->partitions
) {
382 if (p
->priority
< priority
)
384 if (p
->priority
== priority
) {
385 exists
= exists
|| PARTITION_EXISTS(p
);
389 priority
= p
->priority
;
390 exists
= PARTITION_EXISTS(p
);
393 /* Refuse to drop partitions with 0 or negative priorities or partitions of priorities that have at
394 * least one existing priority */
395 if (priority
<= 0 || exists
)
398 LIST_FOREACH(partitions
, p
, context
->partitions
) {
399 if (p
->priority
< priority
)
406 log_info("Can't fit partition %s of priority %" PRIi32
", dropping.", p
->definition_path
, p
->priority
);
412 static uint64_t partition_min_size(const Partition
*p
) {
415 /* Calculate the disk space we really need at minimum for this partition. If the partition already
416 * exists the current size is what we really need. If it doesn't exist yet refuse to allocate less
419 * DEFAULT_MIN_SIZE is the default SizeMin= we configure if nothing else is specified. */
421 if (PARTITION_IS_FOREIGN(p
)) {
422 /* Don't allow changing size of partitions not managed by us */
423 assert(p
->current_size
!= UINT64_MAX
);
424 return p
->current_size
;
427 sz
= p
->current_size
!= UINT64_MAX
? p
->current_size
: HARD_MIN_SIZE
;
429 if (!PARTITION_EXISTS(p
)) {
432 if (p
->encrypt
!= ENCRYPT_OFF
)
433 d
+= round_up_size(LUKS2_METADATA_SIZE
, 4096);
435 if (p
->copy_blocks_size
!= UINT64_MAX
)
436 d
+= round_up_size(p
->copy_blocks_size
, 4096);
437 else if (p
->format
|| p
->encrypt
!= ENCRYPT_OFF
) {
440 /* If we shall synthesize a file system, take minimal fs size into account (assumed to be 4K if not known) */
441 f
= p
->format
? minimal_size_by_fs_name(p
->format
) : UINT64_MAX
;
442 d
+= f
== UINT64_MAX
? 4096 : f
;
449 return MAX(p
->size_min
!= UINT64_MAX
? p
->size_min
: DEFAULT_MIN_SIZE
, sz
);
452 static uint64_t partition_max_size(const Partition
*p
) {
453 /* Calculate how large the partition may become at max. This is generally the configured maximum
454 * size, except when it already exists and is larger than that. In that case it's the existing size,
455 * since we never want to shrink partitions. */
457 if (PARTITION_IS_FOREIGN(p
)) {
458 /* Don't allow changing size of partitions not managed by us */
459 assert(p
->current_size
!= UINT64_MAX
);
460 return p
->current_size
;
463 if (p
->current_size
!= UINT64_MAX
)
464 return MAX(p
->current_size
, p
->size_max
);
469 static uint64_t partition_min_size_with_padding(const Partition
*p
) {
472 /* Calculate the disk space we need for this partition plus any free space coming after it. This
473 * takes user configured padding into account as well as any additional whitespace needed to align
474 * the next partition to 4K again. */
476 sz
= partition_min_size(p
);
478 if (p
->padding_min
!= UINT64_MAX
)
479 sz
+= p
->padding_min
;
481 if (PARTITION_EXISTS(p
)) {
482 /* If the partition wasn't aligned, add extra space so that any we might add will be aligned */
483 assert(p
->offset
!= UINT64_MAX
);
484 return round_up_size(p
->offset
+ sz
, 4096) - p
->offset
;
487 /* If this is a new partition we'll place it aligned, hence we just need to round up the required size here */
488 return round_up_size(sz
, 4096);
491 static uint64_t free_area_available(const FreeArea
*a
) {
494 /* Determines how much of this free area is not allocated yet */
496 assert(a
->size
>= a
->allocated
);
497 return a
->size
- a
->allocated
;
500 static uint64_t free_area_available_for_new_partitions(const FreeArea
*a
) {
503 /* Similar to free_area_available(), but takes into account that the required size and padding of the
504 * preceding partition is honoured. */
506 avail
= free_area_available(a
);
508 uint64_t need
, space
;
510 need
= partition_min_size_with_padding(a
->after
);
512 assert(a
->after
->offset
!= UINT64_MAX
);
513 assert(a
->after
->current_size
!= UINT64_MAX
);
515 space
= round_up_size(a
->after
->offset
+ a
->after
->current_size
, 4096) - a
->after
->offset
+ avail
;
525 static int free_area_compare(FreeArea
*const *a
, FreeArea
*const*b
) {
526 return CMP(free_area_available_for_new_partitions(*a
),
527 free_area_available_for_new_partitions(*b
));
530 static uint64_t charge_size(uint64_t total
, uint64_t amount
) {
533 assert(amount
<= total
);
535 /* Subtract the specified amount from total, rounding up to multiple of 4K if there's room */
536 rounded
= round_up_size(amount
, 4096);
537 if (rounded
>= total
)
540 return total
- rounded
;
543 static uint64_t charge_weight(uint64_t total
, uint64_t amount
) {
544 assert(amount
<= total
);
545 return total
- amount
;
548 static bool context_allocate_partitions(Context
*context
, uint64_t *ret_largest_free_area
) {
553 /* Sort free areas by size, putting smallest first */
554 typesafe_qsort(context
->free_areas
, context
->n_free_areas
, free_area_compare
);
556 /* In any case return size of the largest free area (i.e. not the size of all free areas
558 if (ret_largest_free_area
)
559 *ret_largest_free_area
=
560 context
->n_free_areas
== 0 ? 0 :
561 free_area_available_for_new_partitions(context
->free_areas
[context
->n_free_areas
-1]);
563 /* A simple first-fit algorithm. We return true if we can fit the partitions in, otherwise false. */
564 LIST_FOREACH(partitions
, p
, context
->partitions
) {
569 /* Skip partitions we already dropped or that already exist */
570 if (p
->dropped
|| PARTITION_EXISTS(p
))
573 /* How much do we need to fit? */
574 required
= partition_min_size_with_padding(p
);
575 assert(required
% 4096 == 0);
577 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
578 a
= context
->free_areas
[i
];
580 if (free_area_available_for_new_partitions(a
) >= required
) {
587 return false; /* 😢 Oh no! We can't fit this partition into any free area! */
589 /* Assign the partition to this free area */
590 p
->allocated_to_area
= a
;
592 /* Budget the minimal partition size */
593 a
->allocated
+= required
;
599 static int context_sum_weights(Context
*context
, FreeArea
*a
, uint64_t *ret
) {
600 uint64_t weight_sum
= 0;
607 /* Determine the sum of the weights of all partitions placed in or before the specified free area */
609 LIST_FOREACH(partitions
, p
, context
->partitions
) {
610 if (p
->padding_area
!= a
&& p
->allocated_to_area
!= a
)
613 if (p
->weight
> UINT64_MAX
- weight_sum
)
615 weight_sum
+= p
->weight
;
617 if (p
->padding_weight
> UINT64_MAX
- weight_sum
)
619 weight_sum
+= p
->padding_weight
;
626 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Combined weight of partition exceeds unsigned 64bit range, refusing.");
629 static int scale_by_weight(uint64_t value
, uint64_t weight
, uint64_t weight_sum
, uint64_t *ret
) {
630 assert(weight_sum
>= weight
);
638 if (value
> UINT64_MAX
/ weight
)
639 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Scaling by weight of partition exceeds unsigned 64bit range, refusing.");
641 *ret
= value
* weight
/ weight_sum
;
645 typedef enum GrowPartitionPhase
{
646 /* The first phase: we charge partitions which need more (according to constraints) than their weight-based share. */
649 /* The second phase: we charge partitions which need less (according to constraints) than their weight-based share. */
652 /* The third phase: we distribute what remains among the remaining partitions, according to the weights */
654 } GrowPartitionPhase
;
656 static int context_grow_partitions_phase(
659 GrowPartitionPhase phase
,
661 uint64_t *weight_sum
) {
669 /* Now let's look at the intended weights and adjust them taking the minimum space assignments into
670 * account. i.e. if a partition has a small weight but a high minimum space value set it should not
671 * get any additional room from the left-overs. Similar, if two partitions have the same weight they
672 * should get the same space if possible, even if one has a smaller minimum size than the other. */
673 LIST_FOREACH(partitions
, p
, context
->partitions
) {
675 /* Look only at partitions associated with this free area, i.e. immediately
676 * preceding it, or allocated into it */
677 if (p
->allocated_to_area
!= a
&& p
->padding_area
!= a
)
680 if (p
->new_size
== UINT64_MAX
) {
681 bool charge
= false, try_again
= false;
682 uint64_t share
, rsz
, xsz
;
684 /* Calculate how much this space this partition needs if everyone would get
685 * the weight based share */
686 r
= scale_by_weight(*span
, p
->weight
, *weight_sum
, &share
);
690 rsz
= partition_min_size(p
);
691 xsz
= partition_max_size(p
);
693 if (phase
== PHASE_OVERCHARGE
&& rsz
> share
) {
694 /* This partition needs more than its calculated share. Let's assign
695 * it that, and take this partition out of all calculations and start
699 charge
= try_again
= true;
701 } else if (phase
== PHASE_UNDERCHARGE
&& xsz
!= UINT64_MAX
&& xsz
< share
) {
702 /* This partition accepts less than its calculated
703 * share. Let's assign it that, and take this partition out
704 * of all calculations and start again. */
707 charge
= try_again
= true;
709 } else if (phase
== PHASE_DISTRIBUTE
) {
710 /* This partition can accept its calculated share. Let's
711 * assign it. There's no need to restart things here since
712 * assigning this shouldn't impact the shares of the other
715 if (PARTITION_IS_FOREIGN(p
))
716 /* Never change of foreign partitions (i.e. those we don't manage) */
717 p
->new_size
= p
->current_size
;
719 p
->new_size
= MAX(round_down_size(share
, 4096), rsz
);
725 *span
= charge_size(*span
, p
->new_size
);
726 *weight_sum
= charge_weight(*weight_sum
, p
->weight
);
730 return 0; /* try again */
733 if (p
->new_padding
== UINT64_MAX
) {
734 bool charge
= false, try_again
= false;
737 r
= scale_by_weight(*span
, p
->padding_weight
, *weight_sum
, &share
);
741 if (phase
== PHASE_OVERCHARGE
&& p
->padding_min
!= UINT64_MAX
&& p
->padding_min
> share
) {
742 p
->new_padding
= p
->padding_min
;
743 charge
= try_again
= true;
744 } else if (phase
== PHASE_UNDERCHARGE
&& p
->padding_max
!= UINT64_MAX
&& p
->padding_max
< share
) {
745 p
->new_padding
= p
->padding_max
;
746 charge
= try_again
= true;
747 } else if (phase
== PHASE_DISTRIBUTE
) {
749 p
->new_padding
= round_down_size(share
, 4096);
750 if (p
->padding_min
!= UINT64_MAX
&& p
->new_padding
< p
->padding_min
)
751 p
->new_padding
= p
->padding_min
;
757 *span
= charge_size(*span
, p
->new_padding
);
758 *weight_sum
= charge_weight(*weight_sum
, p
->padding_weight
);
762 return 0; /* try again */
769 static int context_grow_partitions_on_free_area(Context
*context
, FreeArea
*a
) {
770 uint64_t weight_sum
= 0, span
;
776 r
= context_sum_weights(context
, a
, &weight_sum
);
780 /* Let's calculate the total area covered by this free area and the partition before it */
783 assert(a
->after
->offset
!= UINT64_MAX
);
784 assert(a
->after
->current_size
!= UINT64_MAX
);
786 span
+= round_up_size(a
->after
->offset
+ a
->after
->current_size
, 4096) - a
->after
->offset
;
789 GrowPartitionPhase phase
= PHASE_OVERCHARGE
;
791 r
= context_grow_partitions_phase(context
, a
, phase
, &span
, &weight_sum
);
794 if (r
== 0) /* not done yet, re-run this phase */
797 if (phase
== PHASE_OVERCHARGE
)
798 phase
= PHASE_UNDERCHARGE
;
799 else if (phase
== PHASE_UNDERCHARGE
)
800 phase
= PHASE_DISTRIBUTE
;
801 else if (phase
== PHASE_DISTRIBUTE
)
805 /* We still have space left over? Donate to preceding partition if we have one */
806 if (span
> 0 && a
->after
&& !PARTITION_IS_FOREIGN(a
->after
)) {
809 assert(a
->after
->new_size
!= UINT64_MAX
);
810 m
= a
->after
->new_size
+ span
;
812 xsz
= partition_max_size(a
->after
);
813 if (xsz
!= UINT64_MAX
&& m
> xsz
)
816 span
= charge_size(span
, m
- a
->after
->new_size
);
817 a
->after
->new_size
= m
;
820 /* What? Even still some space left (maybe because there was no preceding partition, or it had a
821 * size limit), then let's donate it to whoever wants it. */
825 LIST_FOREACH(partitions
, p
, context
->partitions
) {
828 if (p
->allocated_to_area
!= a
)
831 if (PARTITION_IS_FOREIGN(p
))
834 assert(p
->new_size
!= UINT64_MAX
);
835 m
= p
->new_size
+ span
;
837 xsz
= partition_max_size(p
);
838 if (xsz
!= UINT64_MAX
&& m
> xsz
)
841 span
= charge_size(span
, m
- p
->new_size
);
849 /* Yuck, still no one? Then make it padding */
850 if (span
> 0 && a
->after
) {
851 assert(a
->after
->new_padding
!= UINT64_MAX
);
852 a
->after
->new_padding
+= span
;
858 static int context_grow_partitions(Context
*context
) {
864 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
865 r
= context_grow_partitions_on_free_area(context
, context
->free_areas
[i
]);
870 /* All existing partitions that have no free space after them can't change size */
871 LIST_FOREACH(partitions
, p
, context
->partitions
) {
875 if (!PARTITION_EXISTS(p
) || p
->padding_area
) {
876 /* The algorithm above must have initialized this already */
877 assert(p
->new_size
!= UINT64_MAX
);
881 assert(p
->new_size
== UINT64_MAX
);
882 p
->new_size
= p
->current_size
;
884 assert(p
->new_padding
== UINT64_MAX
);
885 p
->new_padding
= p
->current_padding
;
891 static void context_place_partitions(Context
*context
) {
897 /* Determine next partition number to assign */
898 LIST_FOREACH(partitions
, p
, context
->partitions
) {
899 if (!PARTITION_EXISTS(p
))
902 assert(p
->partno
!= UINT64_MAX
);
903 if (p
->partno
>= partno
)
904 partno
= p
->partno
+ 1;
907 for (size_t i
= 0; i
< context
->n_free_areas
; i
++) {
908 FreeArea
*a
= context
->free_areas
[i
];
909 _unused_
uint64_t left
;
913 assert(a
->after
->offset
!= UINT64_MAX
);
914 assert(a
->after
->new_size
!= UINT64_MAX
);
915 assert(a
->after
->new_padding
!= UINT64_MAX
);
917 start
= a
->after
->offset
+ a
->after
->new_size
+ a
->after
->new_padding
;
919 start
= context
->start
;
921 start
= round_up_size(start
, 4096);
924 LIST_FOREACH(partitions
, p
, context
->partitions
) {
925 if (p
->allocated_to_area
!= a
)
929 p
->partno
= partno
++;
931 assert(left
>= p
->new_size
);
932 start
+= p
->new_size
;
935 assert(left
>= p
->new_padding
);
936 start
+= p
->new_padding
;
937 left
-= p
->new_padding
;
942 static int config_parse_type(
944 const char *filename
,
947 unsigned section_line
,
954 sd_id128_t
*type_uuid
= data
;
960 r
= gpt_partition_type_uuid_from_string(rvalue
, type_uuid
);
962 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse partition type: %s", rvalue
);
967 static int config_parse_label(
969 const char *filename
,
972 unsigned section_line
,
979 _cleanup_free_
char *resolved
= NULL
;
986 /* Nota bene: the empty label is a totally valid one. Let's hence not follow our usual rule of
987 * assigning the empty string to reset to default here, but really accept it as label to set. */
989 r
= specifier_printf(rvalue
, GPT_LABEL_MAX
, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved
);
991 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
992 "Failed to expand specifiers in Label=, ignoring: %s", rvalue
);
996 if (!utf8_is_valid(resolved
)) {
997 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
998 "Partition label not valid UTF-8, ignoring: %s", rvalue
);
1002 r
= gpt_partition_label_valid(resolved
);
1004 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1005 "Failed to check if string is valid as GPT partition label, ignoring: \"%s\" (from \"%s\")",
1010 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
1011 "Partition label too long for GPT table, ignoring: \"%s\" (from \"%s\")",
1016 free_and_replace(*label
, resolved
);
1020 static int config_parse_weight(
1022 const char *filename
,
1024 const char *section
,
1025 unsigned section_line
,
1032 uint32_t *priority
= data
, v
;
1038 r
= safe_atou32(rvalue
, &v
);
1040 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1041 "Failed to parse weight value, ignoring: %s", rvalue
);
1045 if (v
> 1000U*1000U) {
1046 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0,
1047 "Weight needs to be in range 0…10000000, ignoring: %" PRIu32
, v
);
1055 static int config_parse_size4096(
1057 const char *filename
,
1059 const char *section
,
1060 unsigned section_line
,
1067 uint64_t *sz
= data
, parsed
;
1073 r
= parse_size(rvalue
, 1024, &parsed
);
1075 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
,
1076 "Failed to parse size value: %s", rvalue
);
1079 *sz
= round_up_size(parsed
, 4096);
1081 *sz
= round_down_size(parsed
, 4096);
1086 log_syntax(unit
, LOG_NOTICE
, filename
, line
, r
, "Rounded %s= size %" PRIu64
" → %" PRIu64
", a multiple of 4096.", lvalue
, parsed
, *sz
);
1091 static int config_parse_fstype(
1093 const char *filename
,
1095 const char *section
,
1096 unsigned section_line
,
1103 char **fstype
= data
;
1108 if (!filename_is_valid(rvalue
))
1109 return log_syntax(unit
, LOG_ERR
, filename
, line
, 0,
1110 "File system type is not valid, refusing: %s", rvalue
);
1112 return free_and_strdup_warn(fstype
, rvalue
);
1115 static int config_parse_copy_files(
1117 const char *filename
,
1119 const char *section
,
1120 unsigned section_line
,
1127 _cleanup_free_
char *source
= NULL
, *buffer
= NULL
, *resolved_source
= NULL
, *resolved_target
= NULL
;
1128 const char *p
= rvalue
, *target
;
1129 Partition
*partition
= data
;
1135 r
= extract_first_word(&p
, &source
, ":", EXTRACT_CUNESCAPE
|EXTRACT_DONT_COALESCE_SEPARATORS
);
1137 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to extract source path: %s", rvalue
);
1139 log_syntax(unit
, LOG_WARNING
, filename
, line
, 0, "No argument specified: %s", rvalue
);
1143 r
= extract_first_word(&p
, &buffer
, ":", EXTRACT_CUNESCAPE
|EXTRACT_DONT_COALESCE_SEPARATORS
);
1145 return log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to extract target path: %s", rvalue
);
1147 target
= source
; /* No target, then it's the same as the source */
1152 return log_syntax(unit
, LOG_ERR
, filename
, line
, SYNTHETIC_ERRNO(EINVAL
), "Too many arguments: %s", rvalue
);
1154 r
= specifier_printf(source
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved_source
);
1156 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1157 "Failed to expand specifiers in CopyFiles= source, ignoring: %s", rvalue
);
1161 r
= path_simplify_and_warn(resolved_source
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1165 r
= specifier_printf(target
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &resolved_target
);
1167 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1168 "Failed to expand specifiers in CopyFiles= target, ignoring: %s", resolved_target
);
1172 r
= path_simplify_and_warn(resolved_target
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1176 r
= strv_consume_pair(&partition
->copy_files
, TAKE_PTR(resolved_source
), TAKE_PTR(resolved_target
));
1183 static int config_parse_copy_blocks(
1185 const char *filename
,
1187 const char *section
,
1188 unsigned section_line
,
1195 _cleanup_free_
char *d
= NULL
;
1196 Partition
*partition
= data
;
1202 if (isempty(rvalue
)) {
1203 partition
->copy_blocks_path
= mfree(partition
->copy_blocks_path
);
1204 partition
->copy_blocks_auto
= false;
1208 if (streq(rvalue
, "auto")) {
1209 partition
->copy_blocks_path
= mfree(partition
->copy_blocks_path
);
1210 partition
->copy_blocks_auto
= true;
1214 r
= specifier_printf(rvalue
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &d
);
1216 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1217 "Failed to expand specifiers in CopyBlocks= source path, ignoring: %s", rvalue
);
1221 r
= path_simplify_and_warn(d
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1225 free_and_replace(partition
->copy_blocks_path
, d
);
1226 partition
->copy_blocks_auto
= false;
1230 static int config_parse_make_dirs(
1232 const char *filename
,
1234 const char *section
,
1235 unsigned section_line
,
1242 Partition
*partition
= data
;
1243 const char *p
= rvalue
;
1250 _cleanup_free_
char *word
= NULL
, *d
= NULL
;
1252 r
= extract_first_word(&p
, &word
, NULL
, EXTRACT_UNQUOTE
);
1256 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
, "Invalid syntax, ignoring: %s", rvalue
);
1262 r
= specifier_printf(word
, PATH_MAX
-1, system_and_tmp_specifier_table
, arg_root
, NULL
, &d
);
1264 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1265 "Failed to expand specifiers in MakeDirectories= parameter, ignoring: %s", word
);
1269 r
= path_simplify_and_warn(d
, PATH_CHECK_ABSOLUTE
, unit
, filename
, line
, lvalue
);
1273 r
= strv_consume(&partition
->make_directories
, TAKE_PTR(d
));
1279 static DEFINE_CONFIG_PARSE_ENUM_WITH_DEFAULT(config_parse_encrypt
, encrypt_mode
, EncryptMode
, ENCRYPT_OFF
, "Invalid encryption mode");
1281 static int config_parse_gpt_flags(
1283 const char *filename
,
1285 const char *section
,
1286 unsigned section_line
,
1293 uint64_t *gpt_flags
= data
;
1299 r
= safe_atou64(rvalue
, gpt_flags
);
1301 log_syntax(unit
, LOG_WARNING
, filename
, line
, r
,
1302 "Failed to parse Flags= value, ignoring: %s", rvalue
);
1309 static int partition_read_definition(Partition
*p
, const char *path
) {
1311 ConfigTableItem table
[] = {
1312 { "Partition", "Type", config_parse_type
, 0, &p
->type_uuid
},
1313 { "Partition", "Label", config_parse_label
, 0, &p
->new_label
},
1314 { "Partition", "UUID", config_parse_id128
, 0, &p
->new_uuid
},
1315 { "Partition", "Priority", config_parse_int32
, 0, &p
->priority
},
1316 { "Partition", "Weight", config_parse_weight
, 0, &p
->weight
},
1317 { "Partition", "PaddingWeight", config_parse_weight
, 0, &p
->padding_weight
},
1318 { "Partition", "SizeMinBytes", config_parse_size4096
, 1, &p
->size_min
},
1319 { "Partition", "SizeMaxBytes", config_parse_size4096
, -1, &p
->size_max
},
1320 { "Partition", "PaddingMinBytes", config_parse_size4096
, 1, &p
->padding_min
},
1321 { "Partition", "PaddingMaxBytes", config_parse_size4096
, -1, &p
->padding_max
},
1322 { "Partition", "FactoryReset", config_parse_bool
, 0, &p
->factory_reset
},
1323 { "Partition", "CopyBlocks", config_parse_copy_blocks
, 0, p
},
1324 { "Partition", "Format", config_parse_fstype
, 0, &p
->format
},
1325 { "Partition", "CopyFiles", config_parse_copy_files
, 0, p
},
1326 { "Partition", "MakeDirectories", config_parse_make_dirs
, 0, p
},
1327 { "Partition", "Encrypt", config_parse_encrypt
, 0, &p
->encrypt
},
1328 { "Partition", "Flags", config_parse_gpt_flags
, 0, &p
->gpt_flags
},
1329 { "Partition", "ReadOnly", config_parse_tristate
, 0, &p
->read_only
},
1330 { "Partition", "NoAuto", config_parse_tristate
, 0, &p
->no_auto
},
1331 { "Partition", "GrowFileSystem", config_parse_tristate
, 0, &p
->growfs
},
1336 r
= config_parse(NULL
, path
, NULL
,
1338 config_item_table_lookup
, table
,
1345 if (p
->size_min
!= UINT64_MAX
&& p
->size_max
!= UINT64_MAX
&& p
->size_min
> p
->size_max
)
1346 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1347 "SizeMinBytes= larger than SizeMaxBytes=, refusing.");
1349 if (p
->padding_min
!= UINT64_MAX
&& p
->padding_max
!= UINT64_MAX
&& p
->padding_min
> p
->padding_max
)
1350 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1351 "PaddingMinBytes= larger than PaddingMaxBytes=, refusing.");
1353 if (sd_id128_is_null(p
->type_uuid
))
1354 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1355 "Type= not defined, refusing.");
1357 if ((p
->copy_blocks_path
|| p
->copy_blocks_auto
) &&
1358 (p
->format
|| !strv_isempty(p
->copy_files
) || !strv_isempty(p
->make_directories
)))
1359 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1360 "Format=/CopyFiles=/MakeDirectories= and CopyBlocks= cannot be combined, refusing.");
1362 if ((!strv_isempty(p
->copy_files
) || !strv_isempty(p
->make_directories
)) && streq_ptr(p
->format
, "swap"))
1363 return log_syntax(NULL
, LOG_ERR
, path
, 1, SYNTHETIC_ERRNO(EINVAL
),
1364 "Format=swap and CopyFiles= cannot be combined, refusing.");
1366 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
)))) {
1367 /* Pick "ext4" as file system if we are configured to copy files or encrypt the device */
1368 p
->format
= strdup("ext4");
1373 /* Verity partitions are read only, let's imply the RO flag hence, unless explicitly configured otherwise. */
1374 if ((gpt_partition_type_is_root_verity(p
->type_uuid
) ||
1375 gpt_partition_type_is_usr_verity(p
->type_uuid
)) &&
1377 p
->read_only
= true;
1379 /* Default to "growfs" on, unless read-only */
1380 if (gpt_partition_type_knows_growfs(p
->type_uuid
) &&
1387 static int context_read_definitions(
1389 const char *directory
,
1392 _cleanup_strv_free_
char **files
= NULL
;
1393 Partition
*last
= NULL
;
1400 r
= conf_files_list_strv(&files
, ".conf", NULL
, CONF_FILES_REGULAR
|CONF_FILES_FILTER_MASKED
, (const char**) STRV_MAKE(directory
));
1402 r
= conf_files_list_strv(&files
, ".conf", root
, CONF_FILES_REGULAR
|CONF_FILES_FILTER_MASKED
, (const char**) CONF_PATHS_STRV("repart.d"));
1404 return log_error_errno(r
, "Failed to enumerate *.conf files: %m");
1406 STRV_FOREACH(f
, files
) {
1407 _cleanup_(partition_freep
) Partition
*p
= NULL
;
1409 p
= partition_new();
1413 p
->definition_path
= strdup(*f
);
1414 if (!p
->definition_path
)
1417 r
= partition_read_definition(p
, *f
);
1421 LIST_INSERT_AFTER(partitions
, context
->partitions
, last
, p
);
1423 context
->n_partitions
++;
1429 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(struct fdisk_context
*, fdisk_unref_context
, NULL
);
1430 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(struct fdisk_partition
*, fdisk_unref_partition
, NULL
);
1431 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(struct fdisk_parttype
*, fdisk_unref_parttype
, NULL
);
1432 DEFINE_TRIVIAL_CLEANUP_FUNC_FULL(struct fdisk_table
*, fdisk_unref_table
, NULL
);
1434 static int determine_current_padding(
1435 struct fdisk_context
*c
,
1436 struct fdisk_table
*t
,
1437 struct fdisk_partition
*p
,
1440 size_t n_partitions
;
1441 uint64_t offset
, next
= UINT64_MAX
;
1447 if (!fdisk_partition_has_end(p
))
1448 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition has no end!");
1450 offset
= fdisk_partition_get_end(p
);
1451 assert(offset
< UINT64_MAX
/ 512);
1454 n_partitions
= fdisk_table_get_nents(t
);
1455 for (size_t i
= 0; i
< n_partitions
; i
++) {
1456 struct fdisk_partition
*q
;
1459 q
= fdisk_table_get_partition(t
, i
);
1461 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to read partition metadata: %m");
1463 if (fdisk_partition_is_used(q
) <= 0)
1466 if (!fdisk_partition_has_start(q
))
1469 start
= fdisk_partition_get_start(q
);
1470 assert(start
< UINT64_MAX
/ 512);
1473 if (start
>= offset
&& (next
== UINT64_MAX
|| next
> start
))
1477 if (next
== UINT64_MAX
) {
1478 /* No later partition? In that case check the end of the usable area */
1479 next
= fdisk_get_last_lba(c
);
1480 assert(next
< UINT64_MAX
);
1481 next
++; /* The last LBA is one sector before the end */
1483 assert(next
< UINT64_MAX
/ 512);
1487 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition end beyond disk end.");
1490 assert(next
>= offset
);
1491 offset
= round_up_size(offset
, 4096);
1492 next
= round_down_size(next
, 4096);
1494 if (next
>= offset
) /* Check again, rounding might have fucked things up */
1495 *ret
= next
- offset
;
1502 static int fdisk_ask_cb(struct fdisk_context
*c
, struct fdisk_ask
*ask
, void *data
) {
1503 _cleanup_free_
char *ids
= NULL
;
1506 if (fdisk_ask_get_type(ask
) != FDISK_ASKTYPE_STRING
)
1509 ids
= new(char, ID128_UUID_STRING_MAX
);
1513 r
= fdisk_ask_string_set_result(ask
, id128_to_uuid_string(*(sd_id128_t
*) data
, ids
));
1521 static int fdisk_set_disklabel_id_by_uuid(struct fdisk_context
*c
, sd_id128_t id
) {
1524 r
= fdisk_set_ask(c
, fdisk_ask_cb
, &id
);
1528 r
= fdisk_set_disklabel_id(c
);
1532 return fdisk_set_ask(c
, NULL
, NULL
);
1535 static int derive_uuid(sd_id128_t base
, const char *token
, sd_id128_t
*ret
) {
1537 unsigned char md
[SHA256_DIGEST_LENGTH
];
1544 /* Derive a new UUID from the specified UUID in a stable and reasonably safe way. Specifically, we
1545 * calculate the HMAC-SHA256 of the specified token string, keyed by the supplied base (typically the
1546 * machine ID). We use the machine ID as key (and not as cleartext!) of the HMAC operation since it's
1547 * the machine ID we don't want to leak. */
1549 if (!HMAC(EVP_sha256(),
1550 &base
, sizeof(base
),
1551 (const unsigned char*) token
, strlen(token
),
1553 return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE
), "HMAC-SHA256 calculation failed.");
1555 /* Take the first half, mark it as v4 UUID */
1556 assert_cc(sizeof(result
.md
) == sizeof(result
.id
) * 2);
1557 *ret
= id128_make_v4_uuid(result
.id
);
1561 static int context_load_partition_table(
1566 _cleanup_(fdisk_unref_contextp
) struct fdisk_context
*c
= NULL
;
1567 _cleanup_(fdisk_unref_tablep
) struct fdisk_table
*t
= NULL
;
1568 uint64_t left_boundary
= UINT64_MAX
, first_lba
, last_lba
, nsectors
;
1569 _cleanup_free_
char *disk_uuid_string
= NULL
;
1570 bool from_scratch
= false;
1571 sd_id128_t disk_uuid
;
1572 size_t n_partitions
;
1578 assert(!context
->fdisk_context
);
1579 assert(!context
->free_areas
);
1580 assert(context
->start
== UINT64_MAX
);
1581 assert(context
->end
== UINT64_MAX
);
1582 assert(context
->total
== UINT64_MAX
);
1584 c
= fdisk_new_context();
1588 /* libfdisk doesn't have an API to operate on arbitrary fds, hence reopen the fd going via the
1589 * /proc/self/fd/ magic path if we have an existing fd. Open the original file otherwise. */
1590 if (*backing_fd
< 0)
1591 r
= fdisk_assign_device(c
, node
, arg_dry_run
);
1593 r
= fdisk_assign_device(c
, FORMAT_PROC_FD_PATH(*backing_fd
), arg_dry_run
);
1594 if (r
== -EINVAL
&& arg_size_auto
) {
1597 /* libfdisk returns EINVAL if opening a file of size zero. Let's check for that, and accept
1598 * it if automatic sizing is requested. */
1600 if (*backing_fd
< 0)
1601 r
= stat(node
, &st
);
1603 r
= fstat(*backing_fd
, &st
);
1605 return log_error_errno(errno
, "Failed to stat block device '%s': %m", node
);
1607 if (S_ISREG(st
.st_mode
) && st
.st_size
== 0)
1608 return /* from_scratch = */ true;
1613 return log_error_errno(r
, "Failed to open device '%s': %m", node
);
1615 if (*backing_fd
< 0) {
1616 /* If we have no fd referencing the device yet, make a copy of the fd now, so that we have one */
1617 *backing_fd
= fcntl(fdisk_get_devfd(c
), F_DUPFD_CLOEXEC
, 3);
1618 if (*backing_fd
< 0)
1619 return log_error_errno(errno
, "Failed to duplicate fdisk fd: %m");
1622 /* Tell udev not to interfere while we are processing the device */
1623 if (flock(fdisk_get_devfd(c
), arg_dry_run
? LOCK_SH
: LOCK_EX
) < 0)
1624 return log_error_errno(errno
, "Failed to lock block device: %m");
1626 switch (arg_empty
) {
1629 /* Refuse empty disks, insist on an existing GPT partition table */
1630 if (!fdisk_is_labeltype(c
, FDISK_DISKLABEL_GPT
))
1631 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s has no GPT disk label, not repartitioning.", node
);
1636 /* Require an empty disk, refuse any existing partition table */
1637 r
= fdisk_has_label(c
);
1639 return log_error_errno(r
, "Failed to determine whether disk %s has a disk label: %m", node
);
1641 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s already has a disk label, refusing.", node
);
1643 from_scratch
= true;
1647 /* Allow both an empty disk and an existing partition table, but only GPT */
1648 r
= fdisk_has_label(c
);
1650 return log_error_errno(r
, "Failed to determine whether disk %s has a disk label: %m", node
);
1652 if (!fdisk_is_labeltype(c
, FDISK_DISKLABEL_GPT
))
1653 return log_notice_errno(SYNTHETIC_ERRNO(EHWPOISON
), "Disk %s has non-GPT disk label, not repartitioning.", node
);
1655 from_scratch
= true;
1661 /* Always reinitiaize the disk, don't consider what there was on the disk before */
1662 from_scratch
= true;
1667 r
= fdisk_create_disklabel(c
, "gpt");
1669 return log_error_errno(r
, "Failed to create GPT disk label: %m");
1671 r
= derive_uuid(context
->seed
, "disk-uuid", &disk_uuid
);
1673 return log_error_errno(r
, "Failed to acquire disk GPT uuid: %m");
1675 r
= fdisk_set_disklabel_id_by_uuid(c
, disk_uuid
);
1677 return log_error_errno(r
, "Failed to set GPT disk label: %m");
1679 goto add_initial_free_area
;
1682 r
= fdisk_get_disklabel_id(c
, &disk_uuid_string
);
1684 return log_error_errno(r
, "Failed to get current GPT disk label UUID: %m");
1686 r
= sd_id128_from_string(disk_uuid_string
, &disk_uuid
);
1688 return log_error_errno(r
, "Failed to parse current GPT disk label UUID: %m");
1690 if (sd_id128_is_null(disk_uuid
)) {
1691 r
= derive_uuid(context
->seed
, "disk-uuid", &disk_uuid
);
1693 return log_error_errno(r
, "Failed to acquire disk GPT uuid: %m");
1695 r
= fdisk_set_disklabel_id(c
);
1697 return log_error_errno(r
, "Failed to set GPT disk label: %m");
1700 r
= fdisk_get_partitions(c
, &t
);
1702 return log_error_errno(r
, "Failed to acquire partition table: %m");
1704 n_partitions
= fdisk_table_get_nents(t
);
1705 for (size_t i
= 0; i
< n_partitions
; i
++) {
1706 _cleanup_free_
char *label_copy
= NULL
;
1707 Partition
*pp
, *last
= NULL
;
1708 struct fdisk_partition
*p
;
1709 struct fdisk_parttype
*pt
;
1710 const char *pts
, *ids
, *label
;
1713 sd_id128_t ptid
, id
;
1716 p
= fdisk_table_get_partition(t
, i
);
1718 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to read partition metadata: %m");
1720 if (fdisk_partition_is_used(p
) <= 0)
1723 if (fdisk_partition_has_start(p
) <= 0 ||
1724 fdisk_partition_has_size(p
) <= 0 ||
1725 fdisk_partition_has_partno(p
) <= 0)
1726 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Found a partition without a position, size or number.");
1728 pt
= fdisk_partition_get_type(p
);
1730 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to acquire type of partition: %m");
1732 pts
= fdisk_parttype_get_string(pt
);
1734 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Failed to acquire type of partition as string: %m");
1736 r
= sd_id128_from_string(pts
, &ptid
);
1738 return log_error_errno(r
, "Failed to parse partition type UUID %s: %m", pts
);
1740 ids
= fdisk_partition_get_uuid(p
);
1742 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Found a partition without a UUID.");
1744 r
= sd_id128_from_string(ids
, &id
);
1746 return log_error_errno(r
, "Failed to parse partition UUID %s: %m", ids
);
1748 label
= fdisk_partition_get_name(p
);
1749 if (!isempty(label
)) {
1750 label_copy
= strdup(label
);
1755 sz
= fdisk_partition_get_size(p
);
1756 assert_se(sz
<= UINT64_MAX
/512);
1759 start
= fdisk_partition_get_start(p
);
1760 assert_se(start
<= UINT64_MAX
/512);
1763 partno
= fdisk_partition_get_partno(p
);
1765 if (left_boundary
== UINT64_MAX
|| left_boundary
> start
)
1766 left_boundary
= start
;
1768 /* Assign this existing partition to the first partition of the right type that doesn't have
1769 * an existing one assigned yet. */
1770 LIST_FOREACH(partitions
, pp
, context
->partitions
) {
1773 if (!sd_id128_equal(pp
->type_uuid
, ptid
))
1776 if (!pp
->current_partition
) {
1777 pp
->current_uuid
= id
;
1778 pp
->current_size
= sz
;
1780 pp
->partno
= partno
;
1781 pp
->current_label
= TAKE_PTR(label_copy
);
1783 pp
->current_partition
= p
;
1784 fdisk_ref_partition(p
);
1786 r
= determine_current_padding(c
, t
, p
, &pp
->current_padding
);
1790 if (pp
->current_padding
> 0) {
1791 r
= context_add_free_area(context
, pp
->current_padding
, pp
);
1801 /* If we have no matching definition, create a new one. */
1803 _cleanup_(partition_freep
) Partition
*np
= NULL
;
1805 np
= partition_new();
1809 np
->current_uuid
= id
;
1810 np
->type_uuid
= ptid
;
1811 np
->current_size
= sz
;
1813 np
->partno
= partno
;
1814 np
->current_label
= TAKE_PTR(label_copy
);
1816 np
->current_partition
= p
;
1817 fdisk_ref_partition(p
);
1819 r
= determine_current_padding(c
, t
, p
, &np
->current_padding
);
1823 if (np
->current_padding
> 0) {
1824 r
= context_add_free_area(context
, np
->current_padding
, np
);
1829 LIST_INSERT_AFTER(partitions
, context
->partitions
, last
, TAKE_PTR(np
));
1830 context
->n_partitions
++;
1834 add_initial_free_area
:
1835 nsectors
= fdisk_get_nsectors(c
);
1836 assert(nsectors
<= UINT64_MAX
/512);
1839 first_lba
= fdisk_get_first_lba(c
);
1840 assert(first_lba
<= UINT64_MAX
/512);
1843 last_lba
= fdisk_get_last_lba(c
);
1844 assert(last_lba
< UINT64_MAX
);
1846 assert(last_lba
<= UINT64_MAX
/512);
1849 assert(last_lba
>= first_lba
);
1851 if (left_boundary
== UINT64_MAX
) {
1852 /* No partitions at all? Then the whole disk is up for grabs. */
1854 first_lba
= round_up_size(first_lba
, 4096);
1855 last_lba
= round_down_size(last_lba
, 4096);
1857 if (last_lba
> first_lba
) {
1858 r
= context_add_free_area(context
, last_lba
- first_lba
, NULL
);
1863 /* Add space left of first partition */
1864 assert(left_boundary
>= first_lba
);
1866 first_lba
= round_up_size(first_lba
, 4096);
1867 left_boundary
= round_down_size(left_boundary
, 4096);
1868 last_lba
= round_down_size(last_lba
, 4096);
1870 if (left_boundary
> first_lba
) {
1871 r
= context_add_free_area(context
, left_boundary
- first_lba
, NULL
);
1877 context
->start
= first_lba
;
1878 context
->end
= last_lba
;
1879 context
->total
= nsectors
;
1880 context
->fdisk_context
= TAKE_PTR(c
);
1882 return from_scratch
;
1885 static void context_unload_partition_table(Context
*context
) {
1886 Partition
*p
, *next
;
1890 LIST_FOREACH_SAFE(partitions
, p
, next
, context
->partitions
) {
1892 /* Entirely remove partitions that have no configuration */
1893 if (PARTITION_IS_FOREIGN(p
)) {
1894 partition_unlink_and_free(context
, p
);
1898 /* Otherwise drop all data we read off the block device and everything we might have
1899 * calculated based on it */
1902 p
->current_size
= UINT64_MAX
;
1903 p
->new_size
= UINT64_MAX
;
1904 p
->current_padding
= UINT64_MAX
;
1905 p
->new_padding
= UINT64_MAX
;
1906 p
->partno
= UINT64_MAX
;
1907 p
->offset
= UINT64_MAX
;
1909 if (p
->current_partition
) {
1910 fdisk_unref_partition(p
->current_partition
);
1911 p
->current_partition
= NULL
;
1914 if (p
->new_partition
) {
1915 fdisk_unref_partition(p
->new_partition
);
1916 p
->new_partition
= NULL
;
1919 p
->padding_area
= NULL
;
1920 p
->allocated_to_area
= NULL
;
1922 p
->current_uuid
= SD_ID128_NULL
;
1923 p
->current_label
= mfree(p
->current_label
);
1926 context
->start
= UINT64_MAX
;
1927 context
->end
= UINT64_MAX
;
1928 context
->total
= UINT64_MAX
;
1930 if (context
->fdisk_context
) {
1931 fdisk_unref_context(context
->fdisk_context
);
1932 context
->fdisk_context
= NULL
;
1935 context_free_free_areas(context
);
1938 static int format_size_change(uint64_t from
, uint64_t to
, char **ret
) {
1941 if (from
!= UINT64_MAX
) {
1942 if (from
== to
|| to
== UINT64_MAX
)
1943 t
= strdup(FORMAT_BYTES(from
));
1945 t
= strjoin(FORMAT_BYTES(from
), " ", special_glyph(SPECIAL_GLYPH_ARROW
), " ", FORMAT_BYTES(to
));
1946 } else if (to
!= UINT64_MAX
)
1947 t
= strjoin(special_glyph(SPECIAL_GLYPH_ARROW
), " ", FORMAT_BYTES(to
));
1960 static const char *partition_label(const Partition
*p
) {
1964 return p
->new_label
;
1966 if (p
->current_label
)
1967 return p
->current_label
;
1969 return gpt_partition_type_uuid_to_string(p
->type_uuid
);
1972 static int context_dump_partitions(Context
*context
, const char *node
) {
1973 _cleanup_(table_unrefp
) Table
*t
= NULL
;
1974 uint64_t sum_padding
= 0, sum_size
= 0;
1978 if ((arg_json_format_flags
& JSON_FORMAT_OFF
) && context
->n_partitions
== 0) {
1979 log_info("Empty partition table.");
1983 t
= table_new("type", "label", "uuid", "file", "node", "offset", "old size", "raw size", "size", "old padding", "raw padding", "padding", "activity");
1987 if (!DEBUG_LOGGING
) {
1988 if (arg_json_format_flags
& JSON_FORMAT_OFF
)
1989 (void) table_set_display(t
, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
1990 (size_t) 8, (size_t) 11);
1992 (void) table_set_display(t
, (size_t) 0, (size_t) 1, (size_t) 2, (size_t) 3, (size_t) 4,
1993 (size_t) 5, (size_t) 6, (size_t) 7, (size_t) 9, (size_t) 10, (size_t) 12);
1996 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 5), 100);
1997 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 6), 100);
1998 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 7), 100);
1999 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 8), 100);
2000 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 9), 100);
2001 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 10), 100);
2002 (void) table_set_align_percent(t
, table_get_cell(t
, 0, 11), 100);
2004 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2005 _cleanup_free_
char *size_change
= NULL
, *padding_change
= NULL
, *partname
= NULL
;
2006 char uuid_buffer
[ID128_UUID_STRING_MAX
];
2007 const char *label
, *activity
= NULL
;
2012 if (p
->current_size
== UINT64_MAX
)
2013 activity
= "create";
2014 else if (p
->current_size
!= p
->new_size
)
2015 activity
= "resize";
2017 label
= partition_label(p
);
2018 partname
= p
->partno
!= UINT64_MAX
? fdisk_partname(node
, p
->partno
+1) : NULL
;
2020 r
= format_size_change(p
->current_size
, p
->new_size
, &size_change
);
2024 r
= format_size_change(p
->current_padding
, p
->new_padding
, &padding_change
);
2028 if (p
->new_size
!= UINT64_MAX
)
2029 sum_size
+= p
->new_size
;
2030 if (p
->new_padding
!= UINT64_MAX
)
2031 sum_padding
+= p
->new_padding
;
2035 TABLE_STRING
, gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, uuid_buffer
),
2036 TABLE_STRING
, empty_to_null(label
) ?: "-", TABLE_SET_COLOR
, empty_to_null(label
) ? NULL
: ansi_grey(),
2037 TABLE_UUID
, sd_id128_is_null(p
->new_uuid
) ? p
->current_uuid
: p
->new_uuid
,
2038 TABLE_STRING
, p
->definition_path
? basename(p
->definition_path
) : "-", TABLE_SET_COLOR
, p
->definition_path
? NULL
: ansi_grey(),
2039 TABLE_STRING
, partname
?: "-", TABLE_SET_COLOR
, partname
? NULL
: ansi_highlight(),
2040 TABLE_UINT64
, p
->offset
,
2041 TABLE_UINT64
, p
->current_size
== UINT64_MAX
? 0 : p
->current_size
,
2042 TABLE_UINT64
, p
->new_size
,
2043 TABLE_STRING
, size_change
, TABLE_SET_COLOR
, !p
->partitions_next
&& sum_size
> 0 ? ansi_underline() : NULL
,
2044 TABLE_UINT64
, p
->current_padding
== UINT64_MAX
? 0 : p
->current_padding
,
2045 TABLE_UINT64
, p
->new_padding
,
2046 TABLE_STRING
, padding_change
, TABLE_SET_COLOR
, !p
->partitions_next
&& sum_padding
> 0 ? ansi_underline() : NULL
,
2047 TABLE_STRING
, activity
?: "unchanged");
2049 return table_log_add_error(r
);
2052 if ((arg_json_format_flags
& JSON_FORMAT_OFF
) && (sum_padding
> 0 || sum_size
> 0)) {
2055 a
= strjoina(special_glyph(SPECIAL_GLYPH_SIGMA
), " = ", FORMAT_BYTES(sum_size
));
2056 b
= strjoina(special_glyph(SPECIAL_GLYPH_SIGMA
), " = ", FORMAT_BYTES(sum_padding
));
2074 return table_log_add_error(r
);
2077 return table_print_with_pager(t
, arg_json_format_flags
, arg_pager_flags
, arg_legend
);
2080 static void context_bar_char_process_partition(
2085 size_t *ret_start
) {
2087 uint64_t from
, to
, total
;
2098 assert(p
->offset
!= UINT64_MAX
);
2099 assert(p
->new_size
!= UINT64_MAX
);
2102 to
= from
+ p
->new_size
;
2104 assert(context
->end
>= context
->start
);
2105 total
= context
->end
- context
->start
;
2107 assert(from
>= context
->start
);
2108 assert(from
<= context
->end
);
2109 x
= (from
- context
->start
) * n
/ total
;
2111 assert(to
>= context
->start
);
2112 assert(to
<= context
->end
);
2113 y
= (to
- context
->start
) * n
/ total
;
2118 for (size_t i
= x
; i
< y
; i
++)
2124 static int partition_hint(const Partition
*p
, const char *node
, char **ret
) {
2125 _cleanup_free_
char *buf
= NULL
;
2129 /* Tries really hard to find a suitable description for this partition */
2131 if (p
->definition_path
) {
2132 buf
= strdup(basename(p
->definition_path
));
2136 label
= partition_label(p
);
2137 if (!isempty(label
)) {
2138 buf
= strdup(label
);
2142 if (p
->partno
!= UINT64_MAX
) {
2143 buf
= fdisk_partname(node
, p
->partno
+1);
2147 if (!sd_id128_is_null(p
->new_uuid
))
2149 else if (!sd_id128_is_null(p
->current_uuid
))
2150 id
= p
->current_uuid
;
2154 buf
= strdup(ID128_TO_UUID_STRING(id
));
2160 *ret
= TAKE_PTR(buf
);
2164 static int context_dump_partition_bar(Context
*context
, const char *node
) {
2165 _cleanup_free_ Partition
**bar
= NULL
;
2166 _cleanup_free_
size_t *start_array
= NULL
;
2167 Partition
*p
, *last
= NULL
;
2171 assert_se((c
= columns()) >= 2);
2172 c
-= 2; /* We do not use the leftmost and rightmost character cell */
2174 bar
= new0(Partition
*, c
);
2178 start_array
= new(size_t, context
->n_partitions
);
2182 LIST_FOREACH(partitions
, p
, context
->partitions
)
2183 context_bar_char_process_partition(context
, bar
, c
, p
, start_array
+ j
++);
2187 for (size_t i
= 0; i
< c
; i
++) {
2192 fputs(z
? ansi_green() : ansi_yellow(), stdout
);
2193 fputs(special_glyph(SPECIAL_GLYPH_DARK_SHADE
), stdout
);
2195 fputs(ansi_normal(), stdout
);
2196 fputs(special_glyph(SPECIAL_GLYPH_LIGHT_SHADE
), stdout
);
2202 fputs(ansi_normal(), stdout
);
2205 for (size_t i
= 0; i
< context
->n_partitions
; i
++) {
2206 _cleanup_free_
char **line
= NULL
;
2208 line
= new0(char*, c
);
2213 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2214 _cleanup_free_
char *d
= NULL
;
2217 if (i
< context
->n_partitions
- j
) {
2219 if (line
[start_array
[j
-1]]) {
2222 /* Upgrade final corner to the right with a branch to the right */
2223 e
= startswith(line
[start_array
[j
-1]], special_glyph(SPECIAL_GLYPH_TREE_RIGHT
));
2225 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH
), e
);
2232 d
= strdup(special_glyph(SPECIAL_GLYPH_TREE_VERTICAL
));
2237 } else if (i
== context
->n_partitions
- j
) {
2238 _cleanup_free_
char *hint
= NULL
;
2240 (void) partition_hint(p
, node
, &hint
);
2242 if (streq_ptr(line
[start_array
[j
-1]], special_glyph(SPECIAL_GLYPH_TREE_VERTICAL
)))
2243 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_BRANCH
), " ", strna(hint
));
2245 d
= strjoin(special_glyph(SPECIAL_GLYPH_TREE_RIGHT
), " ", strna(hint
));
2252 free_and_replace(line
[start_array
[j
-1]], d
);
2260 fputs(line
[j
], stdout
);
2261 j
+= utf8_console_width(line
[j
]);
2270 for (j
= 0; j
< c
; j
++)
2277 static bool context_changed(const Context
*context
) {
2280 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2284 if (p
->allocated_to_area
)
2287 if (p
->new_size
!= p
->current_size
)
2294 static int context_wipe_range(Context
*context
, uint64_t offset
, uint64_t size
) {
2295 _cleanup_(blkid_free_probep
) blkid_probe probe
= NULL
;
2299 assert(offset
!= UINT64_MAX
);
2300 assert(size
!= UINT64_MAX
);
2302 probe
= blkid_new_probe();
2307 r
= blkid_probe_set_device(probe
, fdisk_get_devfd(context
->fdisk_context
), offset
, size
);
2309 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to allocate device probe for wiping.");
2312 if (blkid_probe_enable_superblocks(probe
, true) < 0 ||
2313 blkid_probe_set_superblocks_flags(probe
, BLKID_SUBLKS_MAGIC
|BLKID_SUBLKS_BADCSUM
) < 0 ||
2314 blkid_probe_enable_partitions(probe
, true) < 0 ||
2315 blkid_probe_set_partitions_flags(probe
, BLKID_PARTS_MAGIC
) < 0)
2316 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to enable superblock and partition probing.");
2320 r
= blkid_do_probe(probe
);
2322 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to probe for file systems.");
2327 if (blkid_do_wipe(probe
, false) < 0)
2328 return log_error_errno(errno
?: SYNTHETIC_ERRNO(EIO
), "Failed to wipe file system signature.");
2334 static int context_wipe_partition(Context
*context
, Partition
*p
) {
2339 assert(!PARTITION_EXISTS(p
)); /* Safety check: never wipe existing partitions */
2341 assert(p
->offset
!= UINT64_MAX
);
2342 assert(p
->new_size
!= UINT64_MAX
);
2344 r
= context_wipe_range(context
, p
->offset
, p
->new_size
);
2348 log_info("Successfully wiped file system signatures from future partition %" PRIu64
".", p
->partno
);
2352 static int context_discard_range(
2361 assert(offset
!= UINT64_MAX
);
2362 assert(size
!= UINT64_MAX
);
2367 assert_se((fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
2369 if (fstat(fd
, &st
) < 0)
2372 if (S_ISREG(st
.st_mode
)) {
2373 if (fallocate(fd
, FALLOC_FL_PUNCH_HOLE
|FALLOC_FL_KEEP_SIZE
, offset
, size
) < 0) {
2374 if (ERRNO_IS_NOT_SUPPORTED(errno
))
2383 if (S_ISBLK(st
.st_mode
)) {
2384 uint64_t range
[2], end
;
2386 range
[0] = round_up_size(offset
, 512);
2388 if (offset
> UINT64_MAX
- size
)
2391 end
= offset
+ size
;
2392 if (end
<= range
[0])
2395 range
[1] = round_down_size(end
- range
[0], 512);
2399 if (ioctl(fd
, BLKDISCARD
, range
) < 0) {
2400 if (ERRNO_IS_NOT_SUPPORTED(errno
))
2412 static int context_discard_partition(Context
*context
, Partition
*p
) {
2418 assert(p
->offset
!= UINT64_MAX
);
2419 assert(p
->new_size
!= UINT64_MAX
);
2420 assert(!PARTITION_EXISTS(p
)); /* Safety check: never discard existing partitions */
2425 r
= context_discard_range(context
, p
->offset
, p
->new_size
);
2426 if (r
== -EOPNOTSUPP
) {
2427 log_info("Storage does not support discard, not discarding data in future partition %" PRIu64
".", p
->partno
);
2431 /* Let's handle this gracefully: https://bugzilla.kernel.org/show_bug.cgi?id=211167 */
2432 log_info("Block device is busy, not discarding partition %" PRIu64
" because it probably is mounted.", p
->partno
);
2436 log_info("Partition %" PRIu64
" too short for discard, skipping.", p
->partno
);
2440 return log_error_errno(r
, "Failed to discard data for future partition %" PRIu64
".", p
->partno
);
2442 log_info("Successfully discarded data from future partition %" PRIu64
".", p
->partno
);
2446 static int context_discard_gap_after(Context
*context
, Partition
*p
) {
2447 uint64_t gap
, next
= UINT64_MAX
;
2452 assert(!p
|| (p
->offset
!= UINT64_MAX
&& p
->new_size
!= UINT64_MAX
));
2455 gap
= p
->offset
+ p
->new_size
;
2457 gap
= context
->start
;
2459 LIST_FOREACH(partitions
, q
, context
->partitions
) {
2463 assert(q
->offset
!= UINT64_MAX
);
2464 assert(q
->new_size
!= UINT64_MAX
);
2466 if (q
->offset
< gap
)
2469 if (next
== UINT64_MAX
|| q
->offset
< next
)
2473 if (next
== UINT64_MAX
) {
2474 next
= context
->end
;
2476 return log_error_errno(SYNTHETIC_ERRNO(EIO
), "Partition end beyond disk end.");
2479 assert(next
>= gap
);
2480 r
= context_discard_range(context
, gap
, next
- gap
);
2481 if (r
== -EOPNOTSUPP
) {
2483 log_info("Storage does not support discard, not discarding gap after partition %" PRIu64
".", p
->partno
);
2485 log_info("Storage does not support discard, not discarding gap at beginning of disk.");
2488 if (r
== 0) /* Too short */
2492 return log_error_errno(r
, "Failed to discard gap after partition %" PRIu64
".", p
->partno
);
2494 return log_error_errno(r
, "Failed to discard gap at beginning of disk.");
2498 log_info("Successfully discarded gap after partition %" PRIu64
".", p
->partno
);
2500 log_info("Successfully discarded gap at beginning of disk.");
2505 static int context_wipe_and_discard(Context
*context
, bool from_scratch
) {
2511 /* Wipe and discard the contents of all partitions we are about to create. We skip the discarding if
2512 * we were supposed to start from scratch anyway, as in that case we just discard the whole block
2513 * device in one go early on. */
2515 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2517 if (!p
->allocated_to_area
)
2520 r
= context_wipe_partition(context
, p
);
2524 if (!from_scratch
) {
2525 r
= context_discard_partition(context
, p
);
2529 r
= context_discard_gap_after(context
, p
);
2535 if (!from_scratch
) {
2536 r
= context_discard_gap_after(context
, NULL
);
2544 static int partition_encrypt(
2547 struct crypt_device
**ret_cd
,
2550 #if HAVE_LIBCRYPTSETUP
2551 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2552 _cleanup_(erase_and_freep
) void *volume_key
= NULL
;
2553 _cleanup_free_
char *dm_name
= NULL
, *vol
= NULL
;
2554 size_t volume_key_size
= 256 / 8;
2559 assert(p
->encrypt
!= ENCRYPT_OFF
);
2561 log_debug("Encryption mode for partition %" PRIu64
": %s", p
->partno
, encrypt_mode_to_string(p
->encrypt
));
2563 r
= dlopen_cryptsetup();
2565 return log_error_errno(r
, "libcryptsetup not found, cannot encrypt: %m");
2567 if (asprintf(&dm_name
, "luks-repart-%08" PRIx64
, random_u64()) < 0)
2571 vol
= path_join("/dev/mapper/", dm_name
);
2576 r
= derive_uuid(p
->new_uuid
, "luks-uuid", &uuid
);
2580 log_info("Encrypting future partition %" PRIu64
"...", p
->partno
);
2582 volume_key
= malloc(volume_key_size
);
2586 r
= genuine_random_bytes(volume_key
, volume_key_size
, RANDOM_BLOCK
);
2588 return log_error_errno(r
, "Failed to generate volume key: %m");
2590 r
= sym_crypt_init(&cd
, node
);
2592 return log_error_errno(r
, "Failed to allocate libcryptsetup context: %m");
2594 cryptsetup_enable_logging(cd
);
2596 r
= sym_crypt_format(cd
,
2600 ID128_TO_UUID_STRING(uuid
),
2603 &(struct crypt_params_luks2
) {
2604 .label
= strempty(p
->new_label
),
2605 .sector_size
= 512U,
2608 return log_error_errno(r
, "Failed to LUKS2 format future partition: %m");
2610 if (IN_SET(p
->encrypt
, ENCRYPT_KEY_FILE
, ENCRYPT_KEY_FILE_TPM2
)) {
2611 r
= sym_crypt_keyslot_add_by_volume_key(
2619 return log_error_errno(r
, "Failed to add LUKS2 key: %m");
2622 if (IN_SET(p
->encrypt
, ENCRYPT_TPM2
, ENCRYPT_KEY_FILE_TPM2
)) {
2624 _cleanup_(erase_and_freep
) char *base64_encoded
= NULL
;
2625 _cleanup_(json_variant_unrefp
) JsonVariant
*v
= NULL
;
2626 _cleanup_(erase_and_freep
) void *secret
= NULL
;
2627 _cleanup_free_
void *blob
= NULL
, *hash
= NULL
;
2628 size_t secret_size
, blob_size
, hash_size
;
2629 uint16_t pcr_bank
, primary_alg
;
2632 r
= tpm2_seal(arg_tpm2_device
, arg_tpm2_pcr_mask
, &secret
, &secret_size
, &blob
, &blob_size
, &hash
, &hash_size
, &pcr_bank
, &primary_alg
);
2634 return log_error_errno(r
, "Failed to seal to TPM2: %m");
2636 r
= base64mem(secret
, secret_size
, &base64_encoded
);
2638 return log_error_errno(r
, "Failed to base64 encode secret key: %m");
2640 r
= cryptsetup_set_minimal_pbkdf(cd
);
2642 return log_error_errno(r
, "Failed to set minimal PBKDF: %m");
2644 keyslot
= sym_crypt_keyslot_add_by_volume_key(
2650 strlen(base64_encoded
));
2652 return log_error_errno(keyslot
, "Failed to add new TPM2 key to %s: %m", node
);
2654 r
= tpm2_make_luks2_json(keyslot
, arg_tpm2_pcr_mask
, pcr_bank
, primary_alg
, blob
, blob_size
, hash
, hash_size
, &v
);
2656 return log_error_errno(r
, "Failed to prepare TPM2 JSON token object: %m");
2658 r
= cryptsetup_add_token_json(cd
, v
);
2660 return log_error_errno(r
, "Failed to add TPM2 JSON token to LUKS2 header: %m");
2662 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
),
2663 "Support for TPM2 enrollment not enabled.");
2667 r
= sym_crypt_activate_by_volume_key(
2672 arg_discard
? CRYPT_ACTIVATE_ALLOW_DISCARDS
: 0);
2674 return log_error_errno(r
, "Failed to activate LUKS superblock: %m");
2676 log_info("Successfully encrypted future partition %" PRIu64
".", p
->partno
);
2679 _cleanup_close_
int dev_fd
= -1;
2681 dev_fd
= open(vol
, O_RDWR
|O_CLOEXEC
|O_NOCTTY
);
2683 return log_error_errno(errno
, "Failed to open LUKS volume '%s': %m", vol
);
2685 *ret_fd
= TAKE_FD(dev_fd
);
2689 *ret_cd
= TAKE_PTR(cd
);
2691 *ret_volume
= TAKE_PTR(vol
);
2695 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
), "libcryptsetup is not supported, cannot encrypt: %m");
2699 static int deactivate_luks(struct crypt_device
*cd
, const char *node
) {
2700 #if HAVE_LIBCRYPTSETUP
2708 /* udev or so might access out block device in the background while we are done. Let's hence force
2709 * detach the volume. We sync'ed before, hence this should be safe. */
2711 r
= sym_crypt_deactivate_by_name(cd
, basename(node
), CRYPT_DEACTIVATE_FORCE
);
2713 return log_error_errno(r
, "Failed to deactivate LUKS device: %m");
2721 static int context_copy_blocks(Context
*context
) {
2723 int whole_fd
= -1, r
;
2727 /* Copy in file systems on the block level */
2729 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2730 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2731 _cleanup_(loop_device_unrefp
) LoopDevice
*d
= NULL
;
2732 _cleanup_free_
char *encrypted
= NULL
;
2733 _cleanup_close_
int encrypted_dev_fd
= -1;
2736 if (p
->copy_blocks_fd
< 0)
2742 if (PARTITION_EXISTS(p
)) /* Never copy over existing partitions */
2745 assert(p
->new_size
!= UINT64_MAX
);
2746 assert(p
->copy_blocks_size
!= UINT64_MAX
);
2747 assert(p
->new_size
>= p
->copy_blocks_size
);
2750 assert_se((whole_fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
2752 if (p
->encrypt
!= ENCRYPT_OFF
) {
2753 r
= loop_device_make(whole_fd
, O_RDWR
, p
->offset
, p
->new_size
, 0, &d
);
2755 return log_error_errno(r
, "Failed to make loopback device of future partition %" PRIu64
": %m", p
->partno
);
2757 r
= loop_device_flock(d
, LOCK_EX
);
2759 return log_error_errno(r
, "Failed to lock loopback device: %m");
2761 r
= partition_encrypt(p
, d
->node
, &cd
, &encrypted
, &encrypted_dev_fd
);
2763 return log_error_errno(r
, "Failed to encrypt device: %m");
2765 if (flock(encrypted_dev_fd
, LOCK_EX
) < 0)
2766 return log_error_errno(errno
, "Failed to lock LUKS device: %m");
2768 target_fd
= encrypted_dev_fd
;
2770 if (lseek(whole_fd
, p
->offset
, SEEK_SET
) == (off_t
) -1)
2771 return log_error_errno(errno
, "Failed to seek to partition offset: %m");
2773 target_fd
= whole_fd
;
2776 log_info("Copying in '%s' (%s) on block level into future partition %" PRIu64
".",
2777 p
->copy_blocks_path
, FORMAT_BYTES(p
->copy_blocks_size
), p
->partno
);
2779 r
= copy_bytes_full(p
->copy_blocks_fd
, target_fd
, p
->copy_blocks_size
, 0, NULL
, NULL
, NULL
, NULL
);
2781 return log_error_errno(r
, "Failed to copy in data from '%s': %m", p
->copy_blocks_path
);
2783 if (fsync(target_fd
) < 0)
2784 return log_error_errno(errno
, "Failed to synchronize copied data blocks: %m");
2786 if (p
->encrypt
!= ENCRYPT_OFF
) {
2787 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
2789 r
= deactivate_luks(cd
, encrypted
);
2796 r
= loop_device_sync(d
);
2798 return log_error_errno(r
, "Failed to sync loopback device: %m");
2801 log_info("Copying in of '%s' on block level completed.", p
->copy_blocks_path
);
2807 static int do_copy_files(Partition
*p
, const char *fs
) {
2808 char **source
, **target
;
2814 STRV_FOREACH_PAIR(source
, target
, p
->copy_files
) {
2815 _cleanup_close_
int sfd
= -1, pfd
= -1, tfd
= -1;
2817 sfd
= chase_symlinks_and_open(*source
, arg_root
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_CLOEXEC
|O_NOCTTY
, NULL
);
2819 return log_error_errno(sfd
, "Failed to open source file '%s%s': %m", strempty(arg_root
), *source
);
2821 r
= fd_verify_regular(sfd
);
2824 return log_error_errno(r
, "Failed to check type of source file '%s': %m", *source
);
2826 /* We are looking at a directory */
2827 tfd
= chase_symlinks_and_open(*target
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2829 _cleanup_free_
char *dn
= NULL
, *fn
= NULL
;
2832 return log_error_errno(tfd
, "Failed to open target directory '%s': %m", *target
);
2834 r
= path_extract_filename(*target
, &fn
);
2836 return log_error_errno(r
, "Failed to extract filename from '%s': %m", *target
);
2838 r
= path_extract_directory(*target
, &dn
);
2840 return log_error_errno(r
, "Failed to extract directory from '%s': %m", *target
);
2842 r
= mkdir_p_root(fs
, dn
, UID_INVALID
, GID_INVALID
, 0755);
2844 return log_error_errno(r
, "Failed to create parent directory '%s': %m", dn
);
2846 pfd
= chase_symlinks_and_open(dn
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2848 return log_error_errno(pfd
, "Failed to open parent directory of target: %m");
2853 UID_INVALID
, GID_INVALID
,
2854 COPY_REFLINK
|COPY_MERGE
|COPY_REPLACE
|COPY_SIGINT
|COPY_HARDLINKS
|COPY_ALL_XATTRS
);
2859 UID_INVALID
, GID_INVALID
,
2860 COPY_REFLINK
|COPY_MERGE
|COPY_REPLACE
|COPY_SIGINT
|COPY_HARDLINKS
|COPY_ALL_XATTRS
);
2862 return log_error_errno(r
, "Failed to copy '%s' to '%s%s': %m", *source
, strempty(arg_root
), *target
);
2864 _cleanup_free_
char *dn
= NULL
, *fn
= NULL
;
2866 /* We are looking at a regular file */
2868 r
= path_extract_filename(*target
, &fn
);
2869 if (r
== -EADDRNOTAVAIL
|| r
== O_DIRECTORY
)
2870 return log_error_errno(SYNTHETIC_ERRNO(EISDIR
),
2871 "Target path '%s' refers to a directory, but source path '%s' refers to regular file, can't copy.", *target
, *source
);
2873 return log_error_errno(r
, "Failed to extract filename from '%s': %m", *target
);
2875 r
= path_extract_directory(*target
, &dn
);
2877 return log_error_errno(r
, "Failed to extract directory from '%s': %m", *target
);
2879 r
= mkdir_p_root(fs
, dn
, UID_INVALID
, GID_INVALID
, 0755);
2881 return log_error_errno(r
, "Failed to create parent directory: %m");
2883 pfd
= chase_symlinks_and_open(dn
, fs
, CHASE_PREFIX_ROOT
|CHASE_WARN
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, NULL
);
2885 return log_error_errno(pfd
, "Failed to open parent directory of target: %m");
2887 tfd
= openat(pfd
, fn
, O_CREAT
|O_EXCL
|O_WRONLY
|O_CLOEXEC
, 0700);
2889 return log_error_errno(errno
, "Failed to create target file '%s': %m", *target
);
2891 r
= copy_bytes(sfd
, tfd
, UINT64_MAX
, COPY_REFLINK
|COPY_SIGINT
);
2893 return log_error_errno(r
, "Failed to copy '%s' to '%s%s': %m", *source
, strempty(arg_root
), *target
);
2895 (void) copy_xattr(sfd
, tfd
, COPY_ALL_XATTRS
);
2896 (void) copy_access(sfd
, tfd
);
2897 (void) copy_times(sfd
, tfd
, 0);
2904 static int do_make_directories(Partition
*p
, const char *fs
) {
2911 STRV_FOREACH(d
, p
->make_directories
) {
2913 r
= mkdir_p_root(fs
, *d
, UID_INVALID
, GID_INVALID
, 0755);
2915 return log_error_errno(r
, "Failed to create directory '%s' in file system: %m", *d
);
2921 static int partition_populate(Partition
*p
, const char *node
) {
2927 if (strv_isempty(p
->copy_files
) && strv_isempty(p
->make_directories
))
2930 log_info("Populating partition %" PRIu64
" with files.", p
->partno
);
2932 /* We copy in a child process, since we have to mount the fs for that, and we don't want that fs to
2933 * appear in the host namespace. Hence we fork a child that has its own file system namespace and
2934 * detached mount propagation. */
2936 r
= safe_fork("(sd-copy)", FORK_DEATHSIG
|FORK_LOG
|FORK_WAIT
|FORK_NEW_MOUNTNS
|FORK_MOUNTNS_SLAVE
, NULL
);
2940 static const char fs
[] = "/run/systemd/mount-root";
2941 /* This is a child process with its own mount namespace and propagation to host turned off */
2943 r
= mkdir_p(fs
, 0700);
2945 log_error_errno(r
, "Failed to create mount point: %m");
2946 _exit(EXIT_FAILURE
);
2949 if (mount_nofollow_verbose(LOG_ERR
, node
, fs
, p
->format
, MS_NOATIME
|MS_NODEV
|MS_NOEXEC
|MS_NOSUID
, NULL
) < 0)
2950 _exit(EXIT_FAILURE
);
2952 if (do_copy_files(p
, fs
) < 0)
2953 _exit(EXIT_FAILURE
);
2955 if (do_make_directories(p
, fs
) < 0)
2956 _exit(EXIT_FAILURE
);
2958 r
= syncfs_path(AT_FDCWD
, fs
);
2960 log_error_errno(r
, "Failed to synchronize written files: %m");
2961 _exit(EXIT_FAILURE
);
2964 _exit(EXIT_SUCCESS
);
2967 log_info("Successfully populated partition %" PRIu64
" with files.", p
->partno
);
2971 static int context_mkfs(Context
*context
) {
2977 /* Make a file system */
2979 LIST_FOREACH(partitions
, p
, context
->partitions
) {
2980 _cleanup_(sym_crypt_freep
) struct crypt_device
*cd
= NULL
;
2981 _cleanup_(loop_device_unrefp
) LoopDevice
*d
= NULL
;
2982 _cleanup_free_
char *encrypted
= NULL
;
2983 _cleanup_close_
int encrypted_dev_fd
= -1;
2990 if (PARTITION_EXISTS(p
)) /* Never format existing partitions */
2996 assert(p
->offset
!= UINT64_MAX
);
2997 assert(p
->new_size
!= UINT64_MAX
);
3000 assert_se((fd
= fdisk_get_devfd(context
->fdisk_context
)) >= 0);
3002 /* Loopback block devices are not only useful to turn regular files into block devices, but
3003 * also to cut out sections of block devices into new block devices. */
3005 r
= loop_device_make(fd
, O_RDWR
, p
->offset
, p
->new_size
, 0, &d
);
3007 return log_error_errno(r
, "Failed to make loopback device of future partition %" PRIu64
": %m", p
->partno
);
3009 r
= loop_device_flock(d
, LOCK_EX
);
3011 return log_error_errno(r
, "Failed to lock loopback device: %m");
3013 if (p
->encrypt
!= ENCRYPT_OFF
) {
3014 r
= partition_encrypt(p
, d
->node
, &cd
, &encrypted
, &encrypted_dev_fd
);
3016 return log_error_errno(r
, "Failed to encrypt device: %m");
3018 if (flock(encrypted_dev_fd
, LOCK_EX
) < 0)
3019 return log_error_errno(errno
, "Failed to lock LUKS device: %m");
3025 log_info("Formatting future partition %" PRIu64
".", p
->partno
);
3027 /* Calculate the UUID for the file system as HMAC-SHA256 of the string "file-system-uuid",
3028 * keyed off the partition UUID. */
3029 r
= derive_uuid(p
->new_uuid
, "file-system-uuid", &fs_uuid
);
3033 r
= make_filesystem(fsdev
, p
->format
, strempty(p
->new_label
), fs_uuid
, arg_discard
);
3035 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3036 (void) deactivate_luks(cd
, encrypted
);
3040 log_info("Successfully formatted future partition %" PRIu64
".", p
->partno
);
3042 /* The file system is now created, no need to delay udev further */
3043 if (p
->encrypt
!= ENCRYPT_OFF
)
3044 if (flock(encrypted_dev_fd
, LOCK_UN
) < 0)
3045 return log_error_errno(errno
, "Failed to unlock LUKS device: %m");
3047 r
= partition_populate(p
, fsdev
);
3049 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3050 (void) deactivate_luks(cd
, encrypted
);
3054 /* Note that we always sync explicitly here, since mkfs.fat doesn't do that on its own, and
3055 * if we don't sync before detaching a block device the in-flight sectors possibly won't hit
3058 if (p
->encrypt
!= ENCRYPT_OFF
) {
3059 if (fsync(encrypted_dev_fd
) < 0)
3060 return log_error_errno(errno
, "Failed to synchronize LUKS volume: %m");
3061 encrypted_dev_fd
= safe_close(encrypted_dev_fd
);
3063 r
= deactivate_luks(cd
, encrypted
);
3071 r
= loop_device_sync(d
);
3073 return log_error_errno(r
, "Failed to sync loopback device: %m");
3079 static int partition_acquire_uuid(Context
*context
, Partition
*p
, sd_id128_t
*ret
) {
3081 sd_id128_t type_uuid
;
3083 } _packed_ plaintext
= {};
3085 unsigned char md
[SHA256_DIGEST_LENGTH
];
3097 /* Calculate a good UUID for the indicated partition. We want a certain degree of reproducibility,
3098 * hence we won't generate the UUIDs randomly. Instead we use a cryptographic hash (precisely:
3099 * HMAC-SHA256) to derive them from a single seed. The seed is generally the machine ID of the
3100 * installation we are processing, but if random behaviour is desired can be random, too. We use the
3101 * seed value as key for the HMAC (since the machine ID is something we generally don't want to leak)
3102 * and the partition type as plaintext. The partition type is suffixed with a counter (only for the
3103 * second and later partition of the same type) if we have more than one partition of the same
3104 * time. Or in other words:
3107 * SEED := /etc/machine-id
3109 * If first partition instance of type TYPE_UUID:
3110 * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID)
3112 * For all later partition instances of type TYPE_UUID with INSTANCE being the LE64 encoded instance number:
3113 * PARTITION_UUID := HMAC-SHA256(SEED, TYPE_UUID || INSTANCE)
3116 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3120 if (!sd_id128_equal(p
->type_uuid
, q
->type_uuid
))
3126 plaintext
.type_uuid
= p
->type_uuid
;
3127 plaintext
.counter
= htole64(k
);
3129 if (!HMAC(EVP_sha256(),
3130 &context
->seed
, sizeof(context
->seed
),
3131 (const unsigned char*) &plaintext
, k
== 0 ? sizeof(sd_id128_t
) : sizeof(plaintext
),
3133 return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE
), "SHA256 calculation failed.");
3135 /* Take the first half, mark it as v4 UUID */
3136 assert_cc(sizeof(result
.md
) == sizeof(result
.id
) * 2);
3137 result
.id
= id128_make_v4_uuid(result
.id
);
3139 /* Ensure this partition UUID is actually unique, and there's no remaining partition from an earlier run? */
3140 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3144 if (sd_id128_in_set(result
.id
, q
->current_uuid
, q
->new_uuid
)) {
3145 log_warning("Partition UUID calculated from seed for partition %" PRIu64
" already used, reverting to randomized UUID.", p
->partno
);
3147 r
= sd_id128_randomize(&result
.id
);
3149 return log_error_errno(r
, "Failed to generate randomized UUID: %m");
3159 static int partition_acquire_label(Context
*context
, Partition
*p
, char **ret
) {
3160 _cleanup_free_
char *label
= NULL
;
3168 prefix
= gpt_partition_type_uuid_to_string(p
->type_uuid
);
3173 const char *ll
= label
?: prefix
;
3177 LIST_FOREACH(partitions
, q
, context
->partitions
) {
3181 if (streq_ptr(ll
, q
->current_label
) ||
3182 streq_ptr(ll
, q
->new_label
)) {
3191 label
= mfree(label
);
3192 if (asprintf(&label
, "%s-%u", prefix
, ++k
) < 0)
3197 label
= strdup(prefix
);
3202 *ret
= TAKE_PTR(label
);
3206 static int context_acquire_partition_uuids_and_labels(Context
*context
) {
3212 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3213 /* Never touch foreign partitions */
3214 if (PARTITION_IS_FOREIGN(p
)) {
3215 p
->new_uuid
= p
->current_uuid
;
3217 if (p
->current_label
) {
3218 r
= free_and_strdup_warn(&p
->new_label
, strempty(p
->current_label
));
3226 if (!sd_id128_is_null(p
->current_uuid
))
3227 p
->new_uuid
= p
->current_uuid
; /* Never change initialized UUIDs */
3228 else if (sd_id128_is_null(p
->new_uuid
)) {
3229 /* Not explicitly set by user! */
3230 r
= partition_acquire_uuid(context
, p
, &p
->new_uuid
);
3235 if (!isempty(p
->current_label
)) {
3236 /* never change initialized labels */
3237 r
= free_and_strdup_warn(&p
->new_label
, p
->current_label
);
3240 } else if (!p
->new_label
) {
3241 /* Not explicitly set by user! */
3243 r
= partition_acquire_label(context
, p
, &p
->new_label
);
3252 static int set_gpt_flags(struct fdisk_partition
*q
, uint64_t flags
) {
3253 _cleanup_free_
char *a
= NULL
;
3255 for (unsigned i
= 0; i
< sizeof(flags
) * 8; i
++) {
3256 uint64_t bit
= UINT64_C(1) << i
;
3257 char buf
[DECIMAL_STR_MAX(unsigned)+1];
3259 if (!FLAGS_SET(flags
, bit
))
3262 xsprintf(buf
, "%u", i
);
3263 if (!strextend_with_separator(&a
, ",", buf
))
3267 return fdisk_partition_set_attrs(q
, a
);
3270 static uint64_t partition_merge_flags(Partition
*p
) {
3277 if (p
->no_auto
>= 0) {
3278 if (gpt_partition_type_knows_no_auto(p
->type_uuid
))
3279 SET_FLAG(f
, GPT_FLAG_NO_AUTO
, p
->no_auto
);
3281 char buffer
[ID128_UUID_STRING_MAX
];
3282 log_warning("Configured NoAuto=%s for partition type '%s' that doesn't support it, ignoring.",
3284 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3288 if (p
->read_only
>= 0) {
3289 if (gpt_partition_type_knows_read_only(p
->type_uuid
))
3290 SET_FLAG(f
, GPT_FLAG_READ_ONLY
, p
->read_only
);
3292 char buffer
[ID128_UUID_STRING_MAX
];
3293 log_warning("Configured ReadOnly=%s for partition type '%s' that doesn't support it, ignoring.",
3294 yes_no(p
->read_only
),
3295 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3299 if (p
->growfs
>= 0) {
3300 if (gpt_partition_type_knows_growfs(p
->type_uuid
))
3301 SET_FLAG(f
, GPT_FLAG_GROWFS
, p
->growfs
);
3303 char buffer
[ID128_UUID_STRING_MAX
];
3304 log_warning("Configured GrowFileSystem=%s for partition type '%s' that doesn't support it, ignoring.",
3306 gpt_partition_type_uuid_to_string_harder(p
->type_uuid
, buffer
));
3313 static int context_mangle_partitions(Context
*context
) {
3319 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3323 assert(p
->new_size
!= UINT64_MAX
);
3324 assert(p
->offset
!= UINT64_MAX
);
3325 assert(p
->partno
!= UINT64_MAX
);
3327 if (PARTITION_EXISTS(p
)) {
3328 bool changed
= false;
3330 assert(p
->current_partition
);
3332 if (p
->new_size
!= p
->current_size
) {
3333 assert(p
->new_size
>= p
->current_size
);
3334 assert(p
->new_size
% 512 == 0);
3336 r
= fdisk_partition_size_explicit(p
->current_partition
, true);
3338 return log_error_errno(r
, "Failed to enable explicit sizing: %m");
3340 r
= fdisk_partition_set_size(p
->current_partition
, p
->new_size
/ 512);
3342 return log_error_errno(r
, "Failed to grow partition: %m");
3344 log_info("Growing existing partition %" PRIu64
".", p
->partno
);
3348 if (!sd_id128_equal(p
->new_uuid
, p
->current_uuid
)) {
3349 assert(!sd_id128_is_null(p
->new_uuid
));
3351 r
= fdisk_partition_set_uuid(p
->current_partition
, ID128_TO_UUID_STRING(p
->new_uuid
));
3353 return log_error_errno(r
, "Failed to set partition UUID: %m");
3355 log_info("Initializing UUID of existing partition %" PRIu64
".", p
->partno
);
3359 if (!streq_ptr(p
->new_label
, p
->current_label
)) {
3360 r
= fdisk_partition_set_name(p
->current_partition
, strempty(p
->new_label
));
3362 return log_error_errno(r
, "Failed to set partition label: %m");
3364 log_info("Setting partition label of existing partition %" PRIu64
".", p
->partno
);
3369 assert(!PARTITION_IS_FOREIGN(p
)); /* never touch foreign partitions */
3371 r
= fdisk_set_partition(context
->fdisk_context
, p
->partno
, p
->current_partition
);
3373 return log_error_errno(r
, "Failed to update partition: %m");
3376 _cleanup_(fdisk_unref_partitionp
) struct fdisk_partition
*q
= NULL
;
3377 _cleanup_(fdisk_unref_parttypep
) struct fdisk_parttype
*t
= NULL
;
3379 assert(!p
->new_partition
);
3380 assert(p
->offset
% 512 == 0);
3381 assert(p
->new_size
% 512 == 0);
3382 assert(!sd_id128_is_null(p
->new_uuid
));
3383 assert(p
->new_label
);
3385 t
= fdisk_new_parttype();
3389 r
= fdisk_parttype_set_typestr(t
, ID128_TO_UUID_STRING(p
->type_uuid
));
3391 return log_error_errno(r
, "Failed to initialize partition type: %m");
3393 q
= fdisk_new_partition();
3397 r
= fdisk_partition_set_type(q
, t
);
3399 return log_error_errno(r
, "Failed to set partition type: %m");
3401 r
= fdisk_partition_size_explicit(q
, true);
3403 return log_error_errno(r
, "Failed to enable explicit sizing: %m");
3405 r
= fdisk_partition_set_start(q
, p
->offset
/ 512);
3407 return log_error_errno(r
, "Failed to position partition: %m");
3409 r
= fdisk_partition_set_size(q
, p
->new_size
/ 512);
3411 return log_error_errno(r
, "Failed to grow partition: %m");
3413 r
= fdisk_partition_set_partno(q
, p
->partno
);
3415 return log_error_errno(r
, "Failed to set partition number: %m");
3417 r
= fdisk_partition_set_uuid(q
, ID128_TO_UUID_STRING(p
->new_uuid
));
3419 return log_error_errno(r
, "Failed to set partition UUID: %m");
3421 r
= fdisk_partition_set_name(q
, strempty(p
->new_label
));
3423 return log_error_errno(r
, "Failed to set partition label: %m");
3425 /* Merge the no auto + read only + growfs setting with the literal flags, and set them for the partition */
3426 r
= set_gpt_flags(q
, partition_merge_flags(p
));
3428 return log_error_errno(r
, "Failed to set GPT partition flags: %m");
3430 log_info("Adding new partition %" PRIu64
" to partition table.", p
->partno
);
3432 r
= fdisk_add_partition(context
->fdisk_context
, q
, NULL
);
3434 return log_error_errno(r
, "Failed to add partition: %m");
3436 assert(!p
->new_partition
);
3437 p
->new_partition
= TAKE_PTR(q
);
3444 static int context_write_partition_table(
3447 bool from_scratch
) {
3449 _cleanup_(fdisk_unref_tablep
) struct fdisk_table
*original_table
= NULL
;
3454 if (arg_pretty
> 0 ||
3455 (arg_pretty
< 0 && isatty(STDOUT_FILENO
) > 0) ||
3456 !FLAGS_SET(arg_json_format_flags
, JSON_FORMAT_OFF
)) {
3458 (void) context_dump_partitions(context
, node
);
3462 if (arg_json_format_flags
& JSON_FORMAT_OFF
)
3463 (void) context_dump_partition_bar(context
, node
);
3468 if (!from_scratch
&& !context_changed(context
)) {
3469 log_info("No changes.");
3474 log_notice("Refusing to repartition, please re-run with --dry-run=no.");
3478 log_info("Applying changes.");
3481 r
= context_wipe_range(context
, 0, context
->total
);
3485 log_info("Wiped block device.");
3487 r
= context_discard_range(context
, 0, context
->total
);
3488 if (r
== -EOPNOTSUPP
)
3489 log_info("Storage does not support discard, not discarding entire block device data.");
3491 return log_error_errno(r
, "Failed to discard entire block device: %m");
3493 log_info("Discarded entire block device.");
3496 r
= fdisk_get_partitions(context
->fdisk_context
, &original_table
);
3498 return log_error_errno(r
, "Failed to acquire partition table: %m");
3500 /* Wipe fs signatures and discard sectors where the new partitions are going to be placed and in the
3501 * gaps between partitions, just to be sure. */
3502 r
= context_wipe_and_discard(context
, from_scratch
);
3506 r
= context_copy_blocks(context
);
3510 r
= context_mkfs(context
);
3514 r
= context_mangle_partitions(context
);
3518 log_info("Writing new partition table.");
3520 r
= fdisk_write_disklabel(context
->fdisk_context
);
3522 return log_error_errno(r
, "Failed to write partition table: %m");
3524 capable
= blockdev_partscan_enabled(fdisk_get_devfd(context
->fdisk_context
));
3525 if (capable
== -ENOTBLK
)
3526 log_debug("Not telling kernel to reread partition table, since we are not operating on a block device.");
3527 else if (capable
< 0)
3528 return log_error_errno(capable
, "Failed to check if block device supports partition scanning: %m");
3529 else if (capable
> 0) {
3530 log_info("Telling kernel to reread partition table.");
3533 r
= fdisk_reread_partition_table(context
->fdisk_context
);
3535 r
= fdisk_reread_changes(context
->fdisk_context
, original_table
);
3537 return log_error_errno(r
, "Failed to reread partition table: %m");
3539 log_notice("Not telling kernel to reread partition table, because selected image does not support kernel partition block devices.");
3541 log_info("All done.");
3546 static int context_read_seed(Context
*context
, const char *root
) {
3551 if (!sd_id128_is_null(context
->seed
))
3554 if (!arg_randomize
) {
3555 _cleanup_close_
int fd
= -1;
3557 fd
= chase_symlinks_and_open("/etc/machine-id", root
, CHASE_PREFIX_ROOT
, O_RDONLY
|O_CLOEXEC
, NULL
);
3559 log_info("No machine ID set, using randomized partition UUIDs.");
3561 return log_error_errno(fd
, "Failed to determine machine ID of image: %m");
3563 r
= id128_read_fd(fd
, ID128_PLAIN_OR_UNINIT
, &context
->seed
);
3564 if (r
== -ENOMEDIUM
)
3565 log_info("No machine ID set, using randomized partition UUIDs.");
3567 return log_error_errno(r
, "Failed to parse machine ID of image: %m");
3573 r
= sd_id128_randomize(&context
->seed
);
3575 return log_error_errno(r
, "Failed to generate randomized seed: %m");
3580 static int context_factory_reset(Context
*context
, bool from_scratch
) {
3587 if (arg_factory_reset
<= 0)
3590 if (from_scratch
) /* Nothing to reset if we start from scratch */
3594 log_notice("Refusing to factory reset, please re-run with --dry-run=no.");
3598 log_info("Applying factory reset.");
3600 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3602 if (!p
->factory_reset
|| !PARTITION_EXISTS(p
))
3605 assert(p
->partno
!= UINT64_MAX
);
3607 log_info("Removing partition %" PRIu64
" for factory reset.", p
->partno
);
3609 r
= fdisk_delete_partition(context
->fdisk_context
, p
->partno
);
3611 return log_error_errno(r
, "Failed to remove partition %" PRIu64
": %m", p
->partno
);
3617 log_info("Factory reset requested, but no partitions to delete found.");
3621 r
= fdisk_write_disklabel(context
->fdisk_context
);
3623 return log_error_errno(r
, "Failed to write disk label: %m");
3625 log_info("Successfully deleted %zu partitions.", n
);
3629 static int context_can_factory_reset(Context
*context
) {
3634 LIST_FOREACH(partitions
, p
, context
->partitions
)
3635 if (p
->factory_reset
&& PARTITION_EXISTS(p
))
3641 static int resolve_copy_blocks_auto_candidate(
3642 dev_t partition_devno
,
3643 sd_id128_t partition_type_uuid
,
3644 dev_t restrict_devno
,
3645 sd_id128_t
*ret_uuid
) {
3647 _cleanup_(blkid_free_probep
) blkid_probe b
= NULL
;
3648 _cleanup_free_
char *p
= NULL
;
3649 _cleanup_close_
int fd
= -1;
3650 const char *pttype
, *t
;
3651 sd_id128_t pt_parsed
, u
;
3658 /* Checks if the specified partition has the specified GPT type UUID, and is located on the specified
3659 * 'restrict_devno' device. The type check is particularly relevant if we have Verity volume which is
3660 * backed by two separate partitions: the data and the hash partitions, and we need to find the right
3661 * one of the two. */
3663 r
= block_get_whole_disk(partition_devno
, &whole_devno
);
3665 return log_error_errno(
3667 "Unable to determine containing block device of partition %u:%u: %m",
3668 major(partition_devno
), minor(partition_devno
));
3670 if (restrict_devno
!= (dev_t
) -1 &&
3671 restrict_devno
!= whole_devno
)
3672 return log_error_errno(
3673 SYNTHETIC_ERRNO(EPERM
),
3674 "Partition %u:%u is located outside of block device %u:%u, refusing.",
3675 major(partition_devno
), minor(partition_devno
),
3676 major(restrict_devno
), minor(restrict_devno
));
3678 r
= device_path_make_major_minor(S_IFBLK
, whole_devno
, &p
);
3680 return log_error_errno(r
, "Failed to convert block device to device node path: %m");
3682 fd
= open(p
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
);
3684 return log_error_errno(r
, "Failed to open '%s': %m", p
);
3686 if (fstat(fd
, &st
) < 0)
3687 return log_error_errno(r
, "Failed to stat '%s': %m", p
);
3689 if (!S_ISBLK(st
.st_mode
) || st
.st_rdev
!= whole_devno
)
3690 return log_error_errno(
3691 SYNTHETIC_ERRNO(EPERM
),
3692 "Opened and determined block device don't match, refusing.");
3694 b
= blkid_new_probe();
3699 r
= blkid_probe_set_device(b
, fd
, 0, 0);
3701 return log_error_errno(errno_or_else(ENOMEM
), "Failed to open block device '%s': %m", p
);
3703 (void) blkid_probe_enable_partitions(b
, 1);
3704 (void) blkid_probe_set_partitions_flags(b
, BLKID_PARTS_ENTRY_DETAILS
);
3707 r
= blkid_do_safeprobe(b
);
3708 if (IN_SET(r
, -2, 1)) { /* nothing found or ambiguous result */
3709 log_debug("Didn't find partition table on block device '%s'.", p
);
3713 return log_error_errno(errno_or_else(EIO
), "Unable to probe for partition table of '%s': %m", p
);
3715 (void) blkid_probe_lookup_value(b
, "PTTYPE", &pttype
, NULL
);
3716 if (!streq_ptr(pttype
, "gpt")) {
3717 log_debug("Didn't find a GPT partition table on '%s'.", p
);
3722 pl
= blkid_probe_get_partitions(b
);
3724 return log_error_errno(errno_or_else(EIO
), "Unable read partition table of '%s': %m", p
);
3727 pp
= blkid_partlist_devno_to_partition(pl
, partition_devno
);
3729 log_debug("Partition %u:%u has no matching partition table entry on '%s'.",
3730 major(partition_devno
), minor(partition_devno
), p
);
3734 t
= blkid_partition_get_type_string(pp
);
3736 log_debug("Partition %u:%u has no type on '%s'.",
3737 major(partition_devno
), minor(partition_devno
), p
);
3741 r
= sd_id128_from_string(t
, &pt_parsed
);
3743 log_debug_errno(r
, "Failed to parse partition type \"%s\": %m", t
);
3747 if (!sd_id128_equal(pt_parsed
, partition_type_uuid
)) {
3748 log_debug("Partition %u:%u has non-matching partition type " SD_ID128_FORMAT_STR
" (needed: " SD_ID128_FORMAT_STR
"), ignoring.",
3749 major(partition_devno
), minor(partition_devno
),
3750 SD_ID128_FORMAT_VAL(pt_parsed
), SD_ID128_FORMAT_VAL(partition_type_uuid
));
3754 t
= blkid_partition_get_uuid(pp
);
3756 log_debug("Partition %u:%u has no UUID.",
3757 major(partition_devno
), minor(partition_devno
));
3761 r
= sd_id128_from_string(t
, &u
);
3763 log_debug_errno(r
, "Failed to parse partition UUID \"%s\": %m", t
);
3767 log_debug("Automatically found partition %u:%u of right type " SD_ID128_FORMAT_STR
".",
3768 major(partition_devno
), minor(partition_devno
),
3769 SD_ID128_FORMAT_VAL(pt_parsed
));
3777 static int find_backing_devno(
3782 _cleanup_free_
char *resolved
= NULL
;
3787 r
= chase_symlinks(path
, root
, CHASE_PREFIX_ROOT
, &resolved
, NULL
);
3791 r
= path_is_mount_point(resolved
, NULL
, 0);
3794 if (r
== 0) /* Not a mount point, then it's not a partition of its own, let's not automatically use it. */
3797 r
= get_block_device(resolved
, ret
);
3800 if (r
== 0) /* Not backed by physical file system, we can't use this */
3806 static int resolve_copy_blocks_auto(
3807 sd_id128_t type_uuid
,
3809 dev_t restrict_devno
,
3811 sd_id128_t
*ret_uuid
) {
3813 const char *try1
= NULL
, *try2
= NULL
;
3814 char p
[SYS_BLOCK_PATH_MAX("/slaves")];
3815 _cleanup_(closedirp
) DIR *d
= NULL
;
3816 sd_id128_t found_uuid
= SD_ID128_NULL
;
3817 dev_t devno
, found
= 0;
3822 /* Enforce some security restrictions: CopyBlocks=auto should not be an avenue to get outside of the
3823 * --root=/--image= confinement. Specifically, refuse CopyBlocks= in combination with --root= at all,
3824 * and restrict block device references in the --image= case to loopback block device we set up.
3826 * restrict_devno contain the dev_t of the loop back device we operate on in case of --image=, and
3827 * thus declares which device (and its partition subdevices) we shall limit access to. If
3828 * restrict_devno is zero no device probing access shall be allowed at all (used for --root=) and if
3829 * it is (dev_t) -1 then free access shall be allowed (if neither switch is used). */
3831 if (restrict_devno
== 0)
3832 return log_error_errno(SYNTHETIC_ERRNO(EPERM
),
3833 "Automatic discovery of backing block devices not permitted in --root= mode, refusing.");
3835 /* Handles CopyBlocks=auto, and finds the right source partition to copy from. We look for matching
3836 * partitions in the host, using the appropriate directory as key and ensuring that the partition
3839 if (gpt_partition_type_is_root(type_uuid
))
3841 else if (gpt_partition_type_is_usr(type_uuid
))
3843 else if (gpt_partition_type_is_root_verity(type_uuid
))
3845 else if (gpt_partition_type_is_usr_verity(type_uuid
))
3847 else if (sd_id128_equal(type_uuid
, GPT_ESP
)) {
3850 } else if (sd_id128_equal(type_uuid
, GPT_XBOOTLDR
))
3853 return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP
),
3854 "Partition type " SD_ID128_FORMAT_STR
" not supported from automatic source block device discovery.",
3855 SD_ID128_FORMAT_VAL(type_uuid
));
3857 r
= find_backing_devno(try1
, root
, &devno
);
3858 if (r
== -ENOENT
&& try2
)
3859 r
= find_backing_devno(try2
, root
, &devno
);
3861 return log_error_errno(r
, "Failed to resolve automatic CopyBlocks= path for partition type " SD_ID128_FORMAT_STR
", sorry: %m",
3862 SD_ID128_FORMAT_VAL(type_uuid
));
3864 xsprintf_sys_block_path(p
, "/slaves", devno
);
3870 _cleanup_free_
char *q
= NULL
, *t
= NULL
;
3875 de
= readdir_no_dot(d
);
3878 return log_error_errno(errno
, "Failed to read directory '%s': %m", p
);
3883 if (!IN_SET(de
->d_type
, DT_LNK
, DT_UNKNOWN
))
3886 q
= path_join(p
, de
->d_name
, "/dev");
3890 r
= read_one_line_file(q
, &t
);
3892 return log_error_errno(r
, "Failed to read %s: %m", q
);
3894 r
= parse_dev(t
, &sl
);
3896 log_debug_errno(r
, "Failed to parse %s, ignoring: %m", q
);
3899 if (major(sl
) == 0) {
3900 log_debug_errno(r
, "Device backing %s is special, ignoring: %m", q
);
3904 r
= resolve_copy_blocks_auto_candidate(sl
, type_uuid
, restrict_devno
, &u
);
3908 /* We found a matching one! */
3910 return log_error_errno(SYNTHETIC_ERRNO(ENOTUNIQ
),
3911 "Multiple matching partitions found, refusing.");
3917 } else if (errno
!= ENOENT
)
3918 return log_error_errno(errno
, "Failed open %s: %m", p
);
3920 r
= resolve_copy_blocks_auto_candidate(devno
, type_uuid
, restrict_devno
, &found_uuid
);
3928 return log_error_errno(SYNTHETIC_ERRNO(ENXIO
),
3929 "Unable to automatically discover suitable partition to copy blocks from.");
3931 r
= device_path_make_major_minor(S_IFBLK
, found
, ret_path
);
3933 return log_error_errno(r
, "Failed to convert dev_t to device node path: %m");
3936 *ret_uuid
= found_uuid
;
3941 static int context_open_copy_block_paths(
3944 dev_t restrict_devno
) {
3951 LIST_FOREACH(partitions
, p
, context
->partitions
) {
3952 _cleanup_close_
int source_fd
= -1;
3953 _cleanup_free_
char *opened
= NULL
;
3954 sd_id128_t uuid
= SD_ID128_NULL
;
3958 assert(p
->copy_blocks_fd
< 0);
3959 assert(p
->copy_blocks_size
== UINT64_MAX
);
3961 if (PARTITION_EXISTS(p
)) /* Never copy over partitions that already exist! */
3964 if (p
->copy_blocks_path
) {
3966 source_fd
= chase_symlinks_and_open(p
->copy_blocks_path
, root
, CHASE_PREFIX_ROOT
, O_RDONLY
|O_CLOEXEC
|O_NONBLOCK
, &opened
);
3968 return log_error_errno(source_fd
, "Failed to open '%s': %m", p
->copy_blocks_path
);
3970 if (fstat(source_fd
, &st
) < 0)
3971 return log_error_errno(errno
, "Failed to stat block copy file '%s': %m", opened
);
3973 if (!S_ISREG(st
.st_mode
) && restrict_devno
!= (dev_t
) -1)
3974 return log_error_errno(SYNTHETIC_ERRNO(EPERM
),
3975 "Copying from block device node is not permitted in --image=/--root= mode, refusing.");
3977 } else if (p
->copy_blocks_auto
) {
3979 r
= resolve_copy_blocks_auto(p
->type_uuid
, root
, restrict_devno
, &opened
, &uuid
);
3983 source_fd
= open(opened
, O_RDONLY
|O_CLOEXEC
|O_NOCTTY
);
3985 return log_error_errno(errno
, "Failed to open automatically determined source block copy device '%s': %m", opened
);
3987 if (fstat(source_fd
, &st
) < 0)
3988 return log_error_errno(errno
, "Failed to stat block copy file '%s': %m", opened
);
3990 /* If we found it automatically, it must be a block device, let's enforce that */
3991 if (!S_ISBLK(st
.st_mode
))
3992 return log_error_errno(SYNTHETIC_ERRNO(EBADF
),
3993 "Automatically detected source block copy device '%s' is not a block device, refusing: %m", opened
);
3997 if (S_ISDIR(st
.st_mode
)) {
3998 _cleanup_free_
char *bdev
= NULL
;
4000 /* If the file is a directory, automatically find the backing block device */
4002 if (major(st
.st_dev
) != 0)
4003 r
= device_path_make_major_minor(S_IFBLK
, st
.st_dev
, &bdev
);
4007 /* Special support for btrfs */
4009 r
= btrfs_get_block_device_fd(source_fd
, &devt
);
4011 return btrfs_log_dev_root(LOG_ERR
, r
, opened
);
4013 return log_error_errno(r
, "Unable to determine backing block device of '%s': %m", opened
);
4015 r
= device_path_make_major_minor(S_IFBLK
, devt
, &bdev
);
4018 return log_error_errno(r
, "Failed to determine block device path for block device backing '%s': %m", opened
);
4020 safe_close(source_fd
);
4022 source_fd
= open(bdev
, O_RDONLY
|O_CLOEXEC
|O_NOCTTY
);
4024 return log_error_errno(errno
, "Failed to open block device '%s': %m", bdev
);
4026 if (fstat(source_fd
, &st
) < 0)
4027 return log_error_errno(errno
, "Failed to stat block device '%s': %m", bdev
);
4029 if (!S_ISBLK(st
.st_mode
))
4030 return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK
), "Block device '%s' is not actually a block device, refusing.", bdev
);
4033 if (S_ISREG(st
.st_mode
))
4035 else if (S_ISBLK(st
.st_mode
)) {
4036 if (ioctl(source_fd
, BLKGETSIZE64
, &size
) != 0)
4037 return log_error_errno(errno
, "Failed to determine size of block device to copy from: %m");
4039 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
);
4042 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "File to copy bytes from '%s' has zero size, refusing.", opened
);
4043 if (size
% 512 != 0)
4044 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "File to copy bytes from '%s' has size that is not multiple of 512, refusing.", opened
);
4046 p
->copy_blocks_fd
= TAKE_FD(source_fd
);
4047 p
->copy_blocks_size
= size
;
4049 free_and_replace(p
->copy_blocks_path
, opened
);
4051 /* When copying from an existing partition copy that partitions UUID if none is configured explicitly */
4052 if (sd_id128_is_null(p
->new_uuid
) && !sd_id128_is_null(uuid
))
4059 static int help(void) {
4060 _cleanup_free_
char *link
= NULL
;
4063 r
= terminal_urlify_man("systemd-repart", "1", &link
);
4067 printf("%s [OPTIONS...] [DEVICE]\n"
4068 "\n%sGrow and add partitions to partition table.%s\n\n"
4069 " -h --help Show this help\n"
4070 " --version Show package version\n"
4071 " --no-pager Do not pipe output into a pager\n"
4072 " --no-legend Do not show the headers and footers\n"
4073 " --dry-run=BOOL Whether to run dry-run operation\n"
4074 " --empty=MODE One of refuse, allow, require, force, create; controls\n"
4075 " how to handle empty disks lacking partition tables\n"
4076 " --discard=BOOL Whether to discard backing blocks for new partitions\n"
4077 " --pretty=BOOL Whether to show pretty summary before doing changes\n"
4078 " --factory-reset=BOOL Whether to remove data partitions before recreating\n"
4080 " --can-factory-reset Test whether factory reset is defined\n"
4081 " --root=PATH Operate relative to root path\n"
4082 " --image=PATH Operate relative to image file\n"
4083 " --definitions=DIR Find partition definitions in specified directory\n"
4084 " --key-file=PATH Key to use when encrypting partitions\n"
4085 " --tpm2-device=PATH Path to TPM2 device node to use\n"
4086 " --tpm2-pcrs=PCR1+PCR2+PCR3+…\n"
4087 " TPM2 PCR indexes to use for TPM2 enrollment\n"
4088 " --seed=UUID 128bit seed UUID to derive all UUIDs from\n"
4089 " --size=BYTES Grow loopback file to specified size\n"
4090 " --json=pretty|short|off\n"
4091 " Generate JSON output\n"
4092 "\nSee the %s for details.\n",
4093 program_invocation_short_name
,
4101 static int parse_argv(int argc
, char *argv
[]) {
4104 ARG_VERSION
= 0x100,
4111 ARG_CAN_FACTORY_RESET
,
4124 static const struct option options
[] = {
4125 { "help", no_argument
, NULL
, 'h' },
4126 { "version", no_argument
, NULL
, ARG_VERSION
},
4127 { "no-pager", no_argument
, NULL
, ARG_NO_PAGER
},
4128 { "no-legend", no_argument
, NULL
, ARG_NO_LEGEND
},
4129 { "dry-run", required_argument
, NULL
, ARG_DRY_RUN
},
4130 { "empty", required_argument
, NULL
, ARG_EMPTY
},
4131 { "discard", required_argument
, NULL
, ARG_DISCARD
},
4132 { "factory-reset", required_argument
, NULL
, ARG_FACTORY_RESET
},
4133 { "can-factory-reset", no_argument
, NULL
, ARG_CAN_FACTORY_RESET
},
4134 { "root", required_argument
, NULL
, ARG_ROOT
},
4135 { "image", required_argument
, NULL
, ARG_IMAGE
},
4136 { "seed", required_argument
, NULL
, ARG_SEED
},
4137 { "pretty", required_argument
, NULL
, ARG_PRETTY
},
4138 { "definitions", required_argument
, NULL
, ARG_DEFINITIONS
},
4139 { "size", required_argument
, NULL
, ARG_SIZE
},
4140 { "json", required_argument
, NULL
, ARG_JSON
},
4141 { "key-file", required_argument
, NULL
, ARG_KEY_FILE
},
4142 { "tpm2-device", required_argument
, NULL
, ARG_TPM2_DEVICE
},
4143 { "tpm2-pcrs", required_argument
, NULL
, ARG_TPM2_PCRS
},
4147 int c
, r
, dry_run
= -1;
4152 while ((c
= getopt_long(argc
, argv
, "h", options
, NULL
)) >= 0)
4163 arg_pager_flags
|= PAGER_DISABLE
;
4171 r
= parse_boolean_argument("--dry-run=", optarg
, &arg_dry_run
);
4177 if (isempty(optarg
) || streq(optarg
, "refuse"))
4178 arg_empty
= EMPTY_REFUSE
;
4179 else if (streq(optarg
, "allow"))
4180 arg_empty
= EMPTY_ALLOW
;
4181 else if (streq(optarg
, "require"))
4182 arg_empty
= EMPTY_REQUIRE
;
4183 else if (streq(optarg
, "force"))
4184 arg_empty
= EMPTY_FORCE
;
4185 else if (streq(optarg
, "create")) {
4186 arg_empty
= EMPTY_CREATE
;
4189 dry_run
= false; /* Imply --dry-run=no if we create the loopback file
4190 * anew. After all we cannot really break anyone's
4191 * partition tables that way. */
4193 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4194 "Failed to parse --empty= parameter: %s", optarg
);
4198 r
= parse_boolean_argument("--discard=", optarg
, &arg_discard
);
4203 case ARG_FACTORY_RESET
:
4204 r
= parse_boolean_argument("--factory-reset=", optarg
, NULL
);
4207 arg_factory_reset
= r
;
4210 case ARG_CAN_FACTORY_RESET
:
4211 arg_can_factory_reset
= true;
4215 r
= parse_path_argument(optarg
, /* suppress_root= */ false, &arg_root
);
4221 r
= parse_path_argument(optarg
, /* suppress_root= */ false, &arg_image
);
4227 if (isempty(optarg
)) {
4228 arg_seed
= SD_ID128_NULL
;
4229 arg_randomize
= false;
4230 } else if (streq(optarg
, "random"))
4231 arg_randomize
= true;
4233 r
= sd_id128_from_string(optarg
, &arg_seed
);
4235 return log_error_errno(r
, "Failed to parse seed: %s", optarg
);
4237 arg_randomize
= false;
4243 r
= parse_boolean_argument("--pretty=", optarg
, NULL
);
4249 case ARG_DEFINITIONS
:
4250 r
= parse_path_argument(optarg
, false, &arg_definitions
);
4256 uint64_t parsed
, rounded
;
4258 if (streq(optarg
, "auto")) {
4259 arg_size
= UINT64_MAX
;
4260 arg_size_auto
= true;
4264 r
= parse_size(optarg
, 1024, &parsed
);
4266 return log_error_errno(r
, "Failed to parse --size= parameter: %s", optarg
);
4268 rounded
= round_up_size(parsed
, 4096);
4270 return log_error_errno(SYNTHETIC_ERRNO(ERANGE
), "Specified image size too small, refusing.");
4271 if (rounded
== UINT64_MAX
)
4272 return log_error_errno(SYNTHETIC_ERRNO(ERANGE
), "Specified image size too large, refusing.");
4274 if (rounded
!= parsed
)
4275 log_warning("Specified size is not a multiple of 4096, rounding up automatically. (%" PRIu64
" → %" PRIu64
")",
4279 arg_size_auto
= false;
4284 r
= parse_json_argument(optarg
, &arg_json_format_flags
);
4290 case ARG_KEY_FILE
: {
4291 _cleanup_(erase_and_freep
) char *k
= NULL
;
4294 r
= read_full_file_full(
4295 AT_FDCWD
, optarg
, UINT64_MAX
, SIZE_MAX
,
4296 READ_FULL_FILE_SECURE
|READ_FULL_FILE_WARN_WORLD_READABLE
|READ_FULL_FILE_CONNECT_SOCKET
,
4300 return log_error_errno(r
, "Failed to read key file '%s': %m", optarg
);
4302 erase_and_free(arg_key
);
4303 arg_key
= TAKE_PTR(k
);
4308 case ARG_TPM2_DEVICE
: {
4309 _cleanup_free_
char *device
= NULL
;
4311 if (streq(optarg
, "list"))
4312 return tpm2_list_devices();
4314 if (!streq(optarg
, "auto")) {
4315 device
= strdup(optarg
);
4320 free(arg_tpm2_device
);
4321 arg_tpm2_device
= TAKE_PTR(device
);
4325 case ARG_TPM2_PCRS
: {
4328 if (isempty(optarg
)) {
4329 arg_tpm2_pcr_mask
= 0;
4333 r
= tpm2_parse_pcrs(optarg
, &mask
);
4337 if (arg_tpm2_pcr_mask
== UINT32_MAX
)
4338 arg_tpm2_pcr_mask
= mask
;
4340 arg_tpm2_pcr_mask
|= mask
;
4349 assert_not_reached();
4352 if (argc
- optind
> 1)
4353 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4354 "Expected at most one argument, the path to the block device.");
4356 if (arg_factory_reset
> 0 && IN_SET(arg_empty
, EMPTY_FORCE
, EMPTY_REQUIRE
, EMPTY_CREATE
))
4357 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4358 "Combination of --factory-reset=yes and --empty=force/--empty=require/--empty=create is invalid.");
4360 if (arg_can_factory_reset
)
4361 arg_dry_run
= true; /* When --can-factory-reset is specified we don't make changes, hence
4362 * non-dry-run mode makes no sense. Thus, imply dry run mode so that we
4363 * open things strictly read-only. */
4364 else if (dry_run
>= 0)
4365 arg_dry_run
= dry_run
;
4367 if (arg_empty
== EMPTY_CREATE
&& (arg_size
== UINT64_MAX
&& !arg_size_auto
))
4368 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4369 "If --empty=create is specified, --size= must be specified, too.");
4371 if (arg_image
&& arg_root
)
4372 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "Please specify either --root= or --image=, the combination of both is not supported.");
4373 else if (!arg_image
&& !arg_root
&& in_initrd()) {
4375 /* By default operate on /sysusr/ or /sysroot/ when invoked in the initrd. We prefer the
4376 * former, if it is mounted, so that we have deterministic behaviour on systems where /usr/
4377 * is vendor-supplied but the root fs formatted on first boot. */
4378 r
= path_is_mount_point("/sysusr/usr", NULL
, 0);
4380 if (r
< 0 && r
!= -ENOENT
)
4381 log_debug_errno(r
, "Unable to determine whether /sysusr/usr is a mount point, assuming it is not: %m");
4383 arg_root
= strdup("/sysroot");
4385 arg_root
= strdup("/sysusr");
4390 arg_node
= argc
> optind
? argv
[optind
] : NULL
;
4392 if (IN_SET(arg_empty
, EMPTY_FORCE
, EMPTY_REQUIRE
, EMPTY_CREATE
) && !arg_node
&& !arg_image
)
4393 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4394 "A path to a device node or loopback file must be specified when --empty=force, --empty=require or --empty=create are used.");
4396 if (arg_tpm2_pcr_mask
== UINT32_MAX
)
4397 arg_tpm2_pcr_mask
= TPM2_PCR_MASK_DEFAULT
;
4402 static int parse_proc_cmdline_factory_reset(void) {
4406 if (arg_factory_reset
>= 0) /* Never override what is specified on the process command line */
4409 if (!in_initrd()) /* Never honour kernel command line factory reset request outside of the initrd */
4412 r
= proc_cmdline_get_bool("systemd.factory_reset", &b
);
4414 return log_error_errno(r
, "Failed to parse systemd.factory_reset kernel command line argument: %m");
4416 arg_factory_reset
= b
;
4419 log_notice("Honouring factory reset requested via kernel command line.");
4425 static int parse_efi_variable_factory_reset(void) {
4426 _cleanup_free_
char *value
= NULL
;
4429 if (arg_factory_reset
>= 0) /* Never override what is specified on the process command line */
4432 if (!in_initrd()) /* Never honour EFI variable factory reset request outside of the initrd */
4435 r
= efi_get_variable_string(EFI_SYSTEMD_VARIABLE(FactoryReset
), &value
);
4436 if (r
== -ENOENT
|| ERRNO_IS_NOT_SUPPORTED(r
))
4439 return log_error_errno(r
, "Failed to read EFI variable FactoryReset: %m");
4441 r
= parse_boolean(value
);
4443 return log_error_errno(r
, "Failed to parse EFI variable FactoryReset: %m");
4445 arg_factory_reset
= r
;
4447 log_notice("Factory reset requested via EFI variable FactoryReset.");
4452 static int remove_efi_variable_factory_reset(void) {
4455 r
= efi_set_variable(EFI_SYSTEMD_VARIABLE(FactoryReset
), NULL
, 0);
4456 if (r
== -ENOENT
|| ERRNO_IS_NOT_SUPPORTED(r
))
4459 return log_error_errno(r
, "Failed to remove EFI variable FactoryReset: %m");
4461 log_info("Successfully unset EFI variable FactoryReset.");
4465 static int acquire_root_devno(
4472 _cleanup_free_
char *found_path
= NULL
;
4473 dev_t devno
, fd_devno
= MODE_INVALID
;
4474 _cleanup_close_
int fd
= -1;
4482 fd
= chase_symlinks_and_open(p
, root
, CHASE_PREFIX_ROOT
, mode
, &found_path
);
4486 if (fstat(fd
, &st
) < 0)
4489 if (S_ISREG(st
.st_mode
)) {
4490 *ret
= TAKE_PTR(found_path
);
4491 *ret_fd
= TAKE_FD(fd
);
4495 if (S_ISBLK(st
.st_mode
)) {
4496 /* Refuse referencing explicit block devices if a root dir is specified, after all we should
4497 * not be able to leave the image the root path constrains us to. */
4501 fd_devno
= devno
= st
.st_rdev
;
4502 } else if (S_ISDIR(st
.st_mode
)) {
4505 if (major(devno
) == 0) {
4506 r
= btrfs_get_block_device_fd(fd
, &devno
);
4507 if (r
== -ENOTTY
) /* not btrfs */
4515 /* From dm-crypt to backing partition */
4516 r
= block_get_originating(devno
, &devno
);
4518 log_debug_errno(r
, "Device '%s' has no dm-crypt/dm-verity device, no need to look for underlying block device.", p
);
4520 log_debug_errno(r
, "Failed to find underlying block device for '%s', ignoring: %m", p
);
4522 /* From partition to whole disk containing it */
4523 r
= block_get_whole_disk(devno
, &devno
);
4525 log_debug_errno(r
, "Failed to find whole disk block device for '%s', ignoring: %m", p
);
4527 r
= device_path_make_canonical(S_IFBLK
, devno
, ret
);
4529 return log_debug_errno(r
, "Failed to determine canonical path for '%s': %m", p
);
4531 /* Only if we still look at the same block device we can reuse the fd. Otherwise return an
4532 * invalidated fd. */
4533 *ret_fd
= fd_devno
!= MODE_INVALID
&& fd_devno
== devno
? TAKE_FD(fd
) : -1;
4537 static int find_root(char **ret
, int *ret_fd
) {
4540 _cleanup_free_
char *device
= NULL
;
4546 if (arg_empty
== EMPTY_CREATE
) {
4547 _cleanup_close_
int fd
= -1;
4548 _cleanup_free_
char *s
= NULL
;
4550 s
= strdup(arg_node
);
4554 fd
= open(arg_node
, O_RDONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
|O_NOFOLLOW
, 0666);
4556 return log_error_errno(errno
, "Failed to create '%s': %m", arg_node
);
4559 *ret_fd
= TAKE_FD(fd
);
4563 /* Note that we don't specify a root argument here: if the user explicitly configured a node
4564 * we'll take it relative to the host, not the image */
4565 r
= acquire_root_devno(arg_node
, NULL
, O_RDONLY
|O_CLOEXEC
, ret
, ret_fd
);
4567 return btrfs_log_dev_root(LOG_ERR
, r
, arg_node
);
4569 return log_error_errno(r
, "Failed to open file or determine backing device of %s: %m", arg_node
);
4574 assert(IN_SET(arg_empty
, EMPTY_REFUSE
, EMPTY_ALLOW
));
4576 /* If the root mount has been replaced by some form of volatile file system (overlayfs), the
4577 * original root block device node is symlinked in /run/systemd/volatile-root. Let's read that
4579 r
= readlink_malloc("/run/systemd/volatile-root", &device
);
4580 if (r
== -ENOENT
) { /* volatile-root not found */
4581 /* Let's search for the root device. We look for two cases here: first in /, and then in /usr. The
4582 * latter we check for cases where / is a tmpfs and only /usr is an actual persistent block device
4583 * (think: volatile setups) */
4585 FOREACH_STRING(p
, "/", "/usr") {
4587 r
= acquire_root_devno(p
, arg_root
, O_RDONLY
|O_DIRECTORY
|O_CLOEXEC
, ret
, ret_fd
);
4590 return btrfs_log_dev_root(LOG_ERR
, r
, p
);
4592 return log_error_errno(r
, "Failed to determine backing device of %s: %m", p
);
4597 return log_error_errno(r
, "Failed to read symlink /run/systemd/volatile-root: %m");
4599 r
= acquire_root_devno(device
, NULL
, O_RDONLY
|O_CLOEXEC
, ret
, ret_fd
);
4601 return btrfs_log_dev_root(LOG_ERR
, r
, device
);
4603 return log_error_errno(r
, "Failed to open file or determine backing device of %s: %m", device
);
4608 return log_error_errno(SYNTHETIC_ERRNO(ENODEV
), "Failed to discover root block device.");
4611 static int resize_pt(int fd
) {
4612 _cleanup_(fdisk_unref_contextp
) struct fdisk_context
*c
= NULL
;
4615 /* After resizing the backing file we need to resize the partition table itself too, so that it takes
4616 * possession of the enlarged backing file. For this it suffices to open the device with libfdisk and
4617 * immediately write it again, with no changes. */
4619 c
= fdisk_new_context();
4623 r
= fdisk_assign_device(c
, FORMAT_PROC_FD_PATH(fd
), 0);
4625 return log_error_errno(r
, "Failed to open device '%s': %m", FORMAT_PROC_FD_PATH(fd
));
4627 r
= fdisk_has_label(c
);
4629 return log_error_errno(r
, "Failed to determine whether disk '%s' has a disk label: %m", FORMAT_PROC_FD_PATH(fd
));
4631 log_debug("Not resizing partition table, as there currently is none.");
4635 r
= fdisk_write_disklabel(c
);
4637 return log_error_errno(r
, "Failed to write resized partition table: %m");
4639 log_info("Resized partition table.");
4643 static int resize_backing_fd(
4644 const char *node
, /* The primary way we access the disk image to operate on */
4645 int *fd
, /* An O_RDONLY fd referring to that inode */
4646 const char *backing_file
, /* If the above refers to a loopback device, the backing regular file for that, which we can grow */
4647 LoopDevice
*loop_device
) {
4649 _cleanup_close_
int writable_fd
= -1;
4650 uint64_t current_size
;
4657 if (arg_size
== UINT64_MAX
) /* Nothing to do */
4661 /* Open the file if we haven't opened it yet. Note that we open it read-only here, just to
4662 * keep a reference to the file we can pass around. */
4663 *fd
= open(node
, O_RDONLY
|O_CLOEXEC
);
4665 return log_error_errno(errno
, "Failed to open '%s' in order to adjust size: %m", node
);
4668 if (fstat(*fd
, &st
) < 0)
4669 return log_error_errno(errno
, "Failed to stat '%s': %m", node
);
4671 if (S_ISBLK(st
.st_mode
)) {
4673 return log_error_errno(SYNTHETIC_ERRNO(EBADF
), "Cannot resize block device '%s'.", node
);
4675 assert(loop_device
);
4677 if (ioctl(*fd
, BLKGETSIZE64
, ¤t_size
) < 0)
4678 return log_error_errno(errno
, "Failed to determine size of block device %s: %m", node
);
4680 r
= stat_verify_regular(&st
);
4682 return log_error_errno(r
, "Specified path '%s' is not a regular file or loopback block device, cannot resize: %m", node
);
4684 assert(!backing_file
);
4685 assert(!loop_device
);
4686 current_size
= st
.st_size
;
4689 if (current_size
>= arg_size
) {
4690 log_info("File '%s' already is of requested size or larger, not growing. (%s >= %s)",
4691 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4695 if (S_ISBLK(st
.st_mode
)) {
4696 assert(backing_file
);
4698 /* This is a loopback device. We can't really grow those directly, but we can grow the
4699 * backing file, hence let's do that. */
4701 writable_fd
= open(backing_file
, O_WRONLY
|O_CLOEXEC
|O_NONBLOCK
);
4702 if (writable_fd
< 0)
4703 return log_error_errno(errno
, "Failed to open backing file '%s': %m", backing_file
);
4705 if (fstat(writable_fd
, &st
) < 0)
4706 return log_error_errno(errno
, "Failed to stat() backing file '%s': %m", backing_file
);
4708 r
= stat_verify_regular(&st
);
4710 return log_error_errno(r
, "Backing file '%s' of block device is not a regular file: %m", backing_file
);
4712 if ((uint64_t) st
.st_size
!= current_size
)
4713 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
),
4714 "Size of backing file '%s' of loopback block device '%s' don't match, refusing.",
4715 node
, backing_file
);
4717 assert(S_ISREG(st
.st_mode
));
4718 assert(!backing_file
);
4720 /* The file descriptor is read-only. In order to grow the file we need to have a writable fd. We
4721 * reopen the file for that temporarily. We keep the writable fd only open for this operation though,
4722 * as fdisk can't accept it anyway. */
4724 writable_fd
= fd_reopen(*fd
, O_WRONLY
|O_CLOEXEC
);
4725 if (writable_fd
< 0)
4726 return log_error_errno(writable_fd
, "Failed to reopen backing file '%s' writable: %m", node
);
4730 if (fallocate(writable_fd
, 0, 0, arg_size
) < 0) {
4731 if (!ERRNO_IS_NOT_SUPPORTED(errno
))
4732 return log_error_errno(errno
, "Failed to grow '%s' from %s to %s by allocation: %m",
4733 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4735 /* Fallback to truncation, if fallocate() is not supported. */
4736 log_debug("Backing file system does not support fallocate(), falling back to ftruncate().");
4738 if (current_size
== 0) /* Likely regular file just created by us */
4739 log_info("Allocated %s for '%s'.", FORMAT_BYTES(arg_size
), node
);
4741 log_info("File '%s' grown from %s to %s by allocation.",
4742 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4748 if (ftruncate(writable_fd
, arg_size
) < 0)
4749 return log_error_errno(errno
, "Failed to grow '%s' from %s to %s by truncation: %m",
4750 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4752 if (current_size
== 0) /* Likely regular file just created by us */
4753 log_info("Sized '%s' to %s.", node
, FORMAT_BYTES(arg_size
));
4755 log_info("File '%s' grown from %s to %s by truncation.",
4756 node
, FORMAT_BYTES(current_size
), FORMAT_BYTES(arg_size
));
4759 r
= resize_pt(writable_fd
);
4764 r
= loop_device_refresh_size(loop_device
, UINT64_MAX
, arg_size
);
4766 return log_error_errno(r
, "Failed to update loop device size: %m");
4772 static int determine_auto_size(Context
*c
) {
4773 uint64_t sum
= round_up_size(GPT_METADATA_SIZE
, 4096);
4778 LIST_FOREACH(partitions
, p
, c
->partitions
) {
4784 m
= partition_min_size_with_padding(p
);
4785 if (m
> UINT64_MAX
- sum
)
4786 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW
), "Image would grow too large, refusing.");
4791 if (c
->total
!= UINT64_MAX
)
4792 /* Image already allocated? Then show its size. */
4793 log_info("Automatically determined minimal disk image size as %s, current image size is %s.",
4794 FORMAT_BYTES(sum
), FORMAT_BYTES(c
->total
));
4796 /* If the image is being created right now, then it has no previous size, suppress any comment about it hence. */
4797 log_info("Automatically determined minimal disk image size as %s.",
4804 static int run(int argc
, char *argv
[]) {
4805 _cleanup_(loop_device_unrefp
) LoopDevice
*loop_device
= NULL
;
4806 _cleanup_(decrypted_image_unrefp
) DecryptedImage
*decrypted_image
= NULL
;
4807 _cleanup_(umount_and_rmdir_and_freep
) char *mounted_dir
= NULL
;
4808 _cleanup_(context_freep
) Context
* context
= NULL
;
4809 _cleanup_free_
char *node
= NULL
;
4810 _cleanup_close_
int backing_fd
= -1;
4811 bool from_scratch
, node_is_our_loop
= false;
4814 log_show_color(true);
4815 log_parse_environment();
4818 r
= parse_argv(argc
, argv
);
4822 r
= parse_proc_cmdline_factory_reset();
4826 r
= parse_efi_variable_factory_reset();
4833 /* Mount this strictly read-only: we shall modify the partition table, not the file
4835 r
= mount_image_privately_interactively(
4837 DISSECT_IMAGE_MOUNT_READ_ONLY
|
4838 (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) */
4839 DISSECT_IMAGE_GPT_ONLY
|
4840 DISSECT_IMAGE_RELAX_VAR_CHECK
|
4841 DISSECT_IMAGE_USR_NO_ROOT
|
4842 DISSECT_IMAGE_REQUIRE_ROOT
,
4849 arg_root
= strdup(mounted_dir
);
4854 arg_node
= strdup(loop_device
->node
);
4858 /* Remember that the device we are about to manipulate is actually the one we
4859 * allocated here, and thus to increase its backing file we know what to do */
4860 node_is_our_loop
= true;
4864 context
= context_new(arg_seed
);
4868 r
= context_read_definitions(context
, arg_definitions
, arg_root
);
4872 if (context
->n_partitions
<= 0 && arg_empty
== EMPTY_REFUSE
) {
4873 log_info("Didn't find any partition definition files, nothing to do.");
4877 r
= find_root(&node
, &backing_fd
);
4881 if (arg_size
!= UINT64_MAX
) {
4882 r
= resize_backing_fd(
4885 node_is_our_loop
? arg_image
: NULL
,
4886 node_is_our_loop
? loop_device
: NULL
);
4891 r
= context_load_partition_table(context
, node
, &backing_fd
);
4892 if (r
== -EHWPOISON
)
4893 return 77; /* Special return value which means "Not GPT, so not doing anything". This isn't
4894 * really an error when called at boot. */
4897 from_scratch
= r
> 0; /* Starting from scratch */
4899 if (arg_can_factory_reset
) {
4900 r
= context_can_factory_reset(context
);
4904 return EXIT_FAILURE
;
4909 r
= context_factory_reset(context
, from_scratch
);
4913 /* We actually did a factory reset! */
4914 r
= remove_efi_variable_factory_reset();
4918 /* Reload the reduced partition table */
4919 context_unload_partition_table(context
);
4920 r
= context_load_partition_table(context
, node
, &backing_fd
);
4926 (void) context_dump_partitions(context
, node
);
4930 r
= context_read_seed(context
, arg_root
);
4934 /* Open all files to copy blocks from now, since we want to take their size into consideration */
4935 r
= context_open_copy_block_paths(
4938 loop_device
? loop_device
->devno
: /* if --image= is specified, only allow partitions on the loopback device */
4939 arg_root
&& !arg_image
? 0 : /* if --root= is specified, don't accept any block device */
4940 (dev_t
) -1); /* if neither is specified, make no restrictions */
4944 if (arg_size_auto
) {
4945 r
= determine_auto_size(context
);
4949 /* Flush out everything again, and let's grow the file first, then start fresh */
4950 context_unload_partition_table(context
);
4952 assert_se(arg_size
!= UINT64_MAX
);
4953 r
= resize_backing_fd(
4956 node_is_our_loop
? arg_image
: NULL
,
4957 node_is_our_loop
? loop_device
: NULL
);
4961 r
= context_load_partition_table(context
, node
, &backing_fd
);
4966 /* First try to fit new partitions in, dropping by priority until it fits */
4968 uint64_t largest_free_area
;
4970 if (context_allocate_partitions(context
, &largest_free_area
))
4971 break; /* Success! */
4973 if (!context_drop_one_priority(context
)) {
4974 r
= log_error_errno(SYNTHETIC_ERRNO(ENOSPC
),
4975 "Can't fit requested partitions into available free space (%s), refusing.",
4976 FORMAT_BYTES(largest_free_area
));
4977 determine_auto_size(context
);
4982 /* Now assign free space according to the weight logic */
4983 r
= context_grow_partitions(context
);
4987 /* Now calculate where each partition gets placed */
4988 context_place_partitions(context
);
4990 /* Make sure each partition has a unique UUID and unique label */
4991 r
= context_acquire_partition_uuids_and_labels(context
);
4995 r
= context_write_partition_table(context
, node
, from_scratch
);
5002 DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run
);