forked from dracutdevs/dracut
-
Notifications
You must be signed in to change notification settings - Fork 12
/
dracut-functions.sh
executable file
·1168 lines (1053 loc) · 33.7 KB
/
dracut-functions.sh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/bin/bash
#
# functions used by dracut and other tools.
#
# Copyright 2005-2009 Red Hat, Inc. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
export LC_MESSAGES=C
# is_func <command>
# Check whether $1 is a function.
is_func() {
[[ "$(type -t "$1")" == "function" ]]
}
# Generic substring function. If $2 is in $1, return 0.
strstr() { [[ $1 == *"$2"* ]]; }
# Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK
strglobin() { [[ $1 == *$2* ]]; }
# Generic glob matching function. If glob pattern $2 matches all of $1, OK
# shellcheck disable=SC2053
strglob() { [[ $1 == $2 ]]; }
# returns OK if $1 contains literal string $2 at the beginning, and isn't empty
str_starts() { [ "${1#"$2"*}" != "$1" ]; }
# returns OK if $1 contains literal string $2 at the end, and isn't empty
str_ends() { [ "${1%*"$2"}" != "$1" ]; }
trim() {
local var="$*"
var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
printf "%s" "$var"
}
# find a binary. If we were not passed the full path directly,
# search in the usual places to find the binary.
find_binary() {
local _delim
local _path
local l
local p
[[ -z ${1##/*} ]] || _delim="/"
if [[ $1 == *.so* ]]; then
# shellcheck disable=SC2154
for l in $libdirs; do
_path="${l}${_delim}${1}"
if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
printf "%s\n" "${_path}"
return 0
fi
done
_path="${_delim}${1}"
if { $DRACUT_LDD "${dracutsysrootdir}${_path}" &> /dev/null; }; then
printf "%s\n" "${_path}"
return 0
fi
fi
if [[ $1 == */* ]]; then
_path="${_delim}${1}"
if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
printf "%s\n" "${_path}"
return 0
fi
fi
for p in $DRACUT_PATH; do
_path="${p}${_delim}${1}"
if [[ -L ${dracutsysrootdir}${_path} ]] || [[ -x ${dracutsysrootdir}${_path} ]]; then
printf "%s\n" "${_path}"
return 0
fi
done
[[ -n $dracutsysrootdir ]] && return 1
type -P "${1##*/}"
}
ldconfig_paths() {
$DRACUT_LDCONFIG ${dracutsysrootdir:+-r ${dracutsysrootdir} -f /etc/ld.so.conf} -pN 2> /dev/null | grep -E -v '/(lib|lib64|usr/lib|usr/lib64)/[^/]*$' | sed -n 's,.* => \(.*\)/.*,\1,p' | sort | uniq
}
# Version comparision function. Assumes Linux style version scheme.
# $1 = version a
# $2 = comparision op (gt, ge, eq, le, lt, ne)
# $3 = version b
vercmp() {
local _n1
read -r -a _n1 <<< "${1//./ }"
local _op=$2
local _n2
read -r -a _n2 <<< "${3//./ }"
local _i _res
for ((_i = 0; ; _i++)); do
if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then
_res=0
elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then
_res=1
elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then
_res=2
else
continue
fi
break
done
case $_op in
gt) ((_res == 1)) ;;
ge) ((_res != 2)) ;;
eq) ((_res == 0)) ;;
le) ((_res != 1)) ;;
lt) ((_res == 2)) ;;
ne) ((_res != 0)) ;;
esac
}
# Create all subdirectories for given path without creating the last element.
# $1 = path
mksubdirs() {
# shellcheck disable=SC2174
[[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}"
}
# Function prints global variables in format name=value line by line.
# $@ = list of global variables' name
print_vars() {
local _var _value
for _var in "$@"; do
eval printf -v _value "%s" \""\$$_var"\"
[[ ${_value} ]] && printf '%s="%s"\n' "$_var" "$_value"
done
}
# normalize_path <path>
# Prints the normalized path, where it removes any duplicated
# and trailing slashes.
# Example:
# $ normalize_path ///test/test//
# /test/test
normalize_path() {
# shellcheck disable=SC2064
trap "$(shopt -p extglob)" RETURN
shopt -q -s extglob
local p=${1//+(\/)//}
printf "%s\n" "${p%/}"
}
# convert_abs_rel <from> <to>
# Prints the relative path, when creating a symlink to <to> from <from>.
# Example:
# $ convert_abs_rel /usr/bin/test /bin/test-2
# ../../bin/test-2
# $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
convert_abs_rel() {
local __current __absolute __abssize __cursize __newpath
local -i __i __level
set -- "$(normalize_path "$1")" "$(normalize_path "$2")"
# corner case #1 - self looping link
[[ $1 == "$2" ]] && {
printf "%s\n" "${1##*/}"
return
}
# corner case #2 - own dir link
[[ ${1%/*} == "$2" ]] && {
printf ".\n"
return
}
IFS=/ read -r -a __current <<< "$1"
IFS=/ read -r -a __absolute <<< "$2"
__abssize=${#__absolute[@]}
__cursize=${#__current[@]}
while [[ ${__absolute[__level]} == "${__current[__level]}" ]]; do
((__level++))
if ((__level > __abssize || __level > __cursize)); then
break
fi
done
for ((__i = __level; __i < __cursize - 1; __i++)); do
if ((__i > __level)); then
__newpath=$__newpath"/"
fi
__newpath=$__newpath".."
done
for ((__i = __level; __i < __abssize; __i++)); do
if [[ -n $__newpath ]]; then
__newpath=$__newpath"/"
fi
__newpath=$__newpath${__absolute[__i]}
done
printf -- "%s\n" "$__newpath"
}
# get_fs_env <device>
# Get and the ID_FS_TYPE variable from udev for a device.
# Example:
# $ get_fs_env /dev/sda2
# ext4
get_fs_env() {
[[ $1 ]] || return
unset ID_FS_TYPE
ID_FS_TYPE=$(blkid -u filesystem -o export -- "$1" \
| while read -r line || [ -n "$line" ]; do
if [[ $line == "TYPE="* ]]; then
printf "%s" "${line#TYPE=}"
exit 0
fi
done)
if [[ $ID_FS_TYPE ]]; then
printf "%s" "$ID_FS_TYPE"
return 0
fi
return 1
}
# get_maj_min <device>
# Prints the major and minor of a device node.
# Example:
# $ get_maj_min /dev/sda2
# 8:2
get_maj_min() {
local _majmin
local _out
if [[ $get_maj_min_cache_file ]]; then
_out="$(grep -m1 -oE "^$1 \S+$" "$get_maj_min_cache_file" | awk '{print $NF}')"
fi
if ! [[ "$_out" ]]; then
_majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)"
_out="$(printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))")"
if [[ $get_maj_min_cache_file ]]; then
echo "$1 $_out" >> "$get_maj_min_cache_file"
fi
fi
echo -n "$_out"
}
# get_devpath_block <device>
# get the DEVPATH in /sys of a block device
get_devpath_block() {
local _majmin _i
_majmin=$(get_maj_min "$1")
for _i in /sys/block/*/dev /sys/block/*/*/dev; do
[[ -e $_i ]] || continue
if [[ $_majmin == "$(< "$_i")" ]]; then
printf "%s" "${_i%/dev}"
return 0
fi
done
return 1
}
# get a persistent path from a device
get_persistent_dev() {
local i _tmp _dev _pol
_dev=$(get_maj_min "$1")
[ -z "$_dev" ] && return
if [[ -n $persistent_policy ]]; then
_pol="/dev/disk/${persistent_policy}/*"
else
_pol=
fi
for i in \
$_pol \
/dev/mapper/* \
/dev/disk/by-uuid/* \
/dev/disk/by-label/* \
/dev/disk/by-partuuid/* \
/dev/disk/by-partlabel/* \
/dev/disk/by-id/* \
/dev/disk/by-path/*; do
[[ -b $i ]] || continue
[[ $i == /dev/mapper/mpath* ]] && continue
_tmp=$(get_maj_min "$i")
if [ "$_tmp" = "$_dev" ]; then
printf -- "%s" "$i"
return
fi
done
printf -- "%s" "$1"
}
expand_persistent_dev() {
local _dev=$1
case "$_dev" in
LABEL=*)
_dev="/dev/disk/by-label/${_dev#LABEL=}"
;;
UUID=*)
_dev="${_dev#UUID=}"
_dev="${_dev,,}"
_dev="/dev/disk/by-uuid/${_dev}"
;;
PARTUUID=*)
_dev="${_dev#PARTUUID=}"
_dev="${_dev,,}"
_dev="/dev/disk/by-partuuid/${_dev}"
;;
PARTLABEL=*)
_dev="/dev/disk/by-partlabel/${_dev#PARTLABEL=}"
;;
esac
printf "%s" "$_dev"
}
shorten_persistent_dev() {
local _dev="$1"
case "$_dev" in
/dev/disk/by-uuid/*)
printf "%s" "UUID=${_dev##*/}"
;;
/dev/disk/by-label/*)
printf "%s" "LABEL=${_dev##*/}"
;;
/dev/disk/by-partuuid/*)
printf "%s" "PARTUUID=${_dev##*/}"
;;
/dev/disk/by-partlabel/*)
printf "%s" "PARTLABEL=${_dev##*/}"
;;
*)
printf "%s" "$_dev"
;;
esac
}
# find_block_device <mountpoint>
# Prints the major and minor number of the block device
# for a given mountpoint.
# Unless $use_fstab is set to "yes" the functions
# uses /proc/self/mountinfo as the primary source of the
# information and only falls back to /etc/fstab, if the mountpoint
# is not found there.
# Example:
# $ find_block_device /usr
# 8:4
find_block_device() {
local _dev _majmin _find_mpt
_find_mpt="$1"
if [[ $use_fstab != yes ]]; then
[[ -d $_find_mpt/. ]]
findmnt -e -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | {
while read -r _majmin _dev || [ -n "$_dev" ]; do
if [[ -b $_dev ]]; then
if ! [[ $_majmin ]] || [[ $_majmin == 0:* ]]; then
_majmin=$(get_maj_min "$_dev")
fi
if [[ $_majmin ]]; then
printf "%s\n" "$_majmin"
else
printf "%s\n" "$_dev"
fi
return 0
fi
if [[ $_dev == *:* ]]; then
printf "%s\n" "$_dev"
return 0
fi
done
return 1
} && return 0
fi
# fall back to /etc/fstab
[[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
findmnt -e --fstab -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | {
while read -r _majmin _dev || [ -n "$_dev" ]; do
if ! [[ $_dev ]]; then
_dev="$_majmin"
unset _majmin
fi
if [[ -b $_dev ]]; then
[[ $_majmin ]] || _majmin=$(get_maj_min "$_dev")
if [[ $_majmin ]]; then
printf "%s\n" "$_majmin"
else
printf "%s\n" "$_dev"
fi
return 0
fi
if [[ $_dev == *:* ]]; then
printf "%s\n" "$_dev"
return 0
fi
done
return 1
} && return 0
return 1
}
# find_mp_fstype <mountpoint>
# Echo the filesystem type for a given mountpoint.
# /proc/self/mountinfo is taken as the primary source of information
# and /etc/fstab is used as a fallback.
# No newline is appended!
# Example:
# $ find_mp_fstype /;echo
# ext4
find_mp_fstype() {
local _fs
if [[ $use_fstab != yes ]]; then
findmnt -e -v -n -o 'FSTYPE' --target "$1" | {
while read -r _fs || [ -n "$_fs" ]; do
[[ $_fs ]] || continue
[[ $_fs == "autofs" ]] && continue
printf "%s" "$_fs"
return 0
done
return 1
} && return 0
fi
[[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
findmnt --fstab -e -v -n -o 'FSTYPE' --target "$1" | {
while read -r _fs || [ -n "$_fs" ]; do
[[ $_fs ]] || continue
[[ $_fs == "autofs" ]] && continue
printf "%s" "$_fs"
return 0
done
return 1
} && return 0
return 1
}
# find_dev_fstype <device>
# Echo the filesystem type for a given device.
# /proc/self/mountinfo is taken as the primary source of information
# and /etc/fstab is used as a fallback.
# No newline is appended!
# Example:
# $ find_dev_fstype /dev/sda2;echo
# ext4
find_dev_fstype() {
local _find_dev _fs
_find_dev="$1"
if ! [[ $_find_dev == /dev* ]]; then
[[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
fi
if [[ $use_fstab != yes ]]; then
findmnt -e -v -n -o 'FSTYPE' --source "$_find_dev" | {
while read -r _fs || [ -n "$_fs" ]; do
[[ $_fs ]] || continue
[[ $_fs == "autofs" ]] && continue
printf "%s" "$_fs"
return 0
done
return 1
} && return 0
fi
[[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
findmnt --fstab -e -v -n -o 'FSTYPE' --source "$_find_dev" | {
while read -r _fs || [ -n "$_fs" ]; do
[[ $_fs ]] || continue
[[ $_fs == "autofs" ]] && continue
printf "%s" "$_fs"
return 0
done
return 1
} && return 0
return 1
}
# find_mp_fsopts <mountpoint>
# Echo the filesystem options for a given mountpoint.
# /proc/self/mountinfo is taken as the primary source of information
# and /etc/fstab is used as a fallback.
# No newline is appended!
# Example:
# $ find_mp_fsopts /;echo
# rw,relatime,discard,data=ordered
find_mp_fsopts() {
if [[ $use_fstab != yes ]]; then
findmnt -e -v -n -o 'OPTIONS' --target "$1" 2> /dev/null && return 0
fi
[[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
findmnt --fstab -e -v -n -o 'OPTIONS' --target "$1"
}
# find_dev_fsopts <device>
# Echo the filesystem options for a given device.
# /proc/self/mountinfo is taken as the primary source of information
# and /etc/fstab is used as a fallback.
# if `use_fstab == yes`, then only `/etc/fstab` is used.
#
# Example:
# $ find_dev_fsopts /dev/sda2
# rw,relatime,discard,data=ordered
find_dev_fsopts() {
local _find_dev
_find_dev="$1"
if ! [[ $_find_dev == /dev* ]]; then
[[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
fi
if [[ $use_fstab != yes ]]; then
findmnt -e -v -n -o 'OPTIONS' --source "$_find_dev" 2> /dev/null && return 0
fi
[[ ! -f "$dracutsysrootdir"/etc/fstab ]] && return 1
findmnt --fstab -e -v -n -o 'OPTIONS' --source "$_find_dev"
}
# finds the major:minor of the block device backing the root filesystem.
find_root_block_device() { find_block_device /; }
# for_each_host_dev_fs <func>
# Execute "<func> <dev> <filesystem>" for every "<dev> <fs>" pair found
# in ${host_fs_types[@]}
for_each_host_dev_fs() {
local _func="$1"
local _dev
local _ret=1
[[ "${#host_fs_types[@]}" ]] || return 2
for _dev in "${!host_fs_types[@]}"; do
$_func "$_dev" "${host_fs_types[$_dev]}" && _ret=0
done
return $_ret
}
host_fs_all() {
printf "%s\n" "${host_fs_types[@]}"
}
# Walk all the slave relationships for a given block device.
# Stop when our helper function returns success
# $1 = function to call on every found block device
# $2 = block device in major:minor format
check_block_and_slaves() {
local _x
[[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
if ! lvm_internal_dev "$2"; then "$1" "$2" && return; fi
check_vol_slaves "$@" && return 0
if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then
check_block_and_slaves "$1" "$(< "/sys/dev/block/$2/../dev")" && return 0
fi
for _x in /sys/dev/block/"$2"/slaves/*; do
[[ -f $_x/dev ]] || continue
[[ $_x/subsystem -ef /sys/class/block ]] || continue
check_block_and_slaves "$1" "$(< "$_x/dev")" && return 0
done
return 1
}
check_block_and_slaves_all() {
local _x _ret=1
[[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
if ! lvm_internal_dev "$2" && "$1" "$2"; then
_ret=0
fi
check_vol_slaves_all "$@" && return 0
if [[ -f /sys/dev/block/$2/../dev ]] && [[ /sys/dev/block/$2/../subsystem -ef /sys/class/block ]]; then
check_block_and_slaves_all "$1" "$(< "/sys/dev/block/$2/../dev")" && _ret=0
fi
for _x in /sys/dev/block/"$2"/slaves/*; do
[[ -f $_x/dev ]] || continue
[[ $_x/subsystem -ef /sys/class/block ]] || continue
check_block_and_slaves_all "$1" "$(< "$_x/dev")" && _ret=0
done
return $_ret
}
# for_each_host_dev_and_slaves <func>
# Execute "<func> <dev>" for every "<dev>" found
# in ${host_devs[@]} and their slaves
for_each_host_dev_and_slaves_all() {
local _func="$1"
local _dev
local _ret=1
[[ "${host_devs[*]}" ]] || return 2
for _dev in "${host_devs[@]}"; do
[[ -b $_dev ]] || continue
if check_block_and_slaves_all "$_func" "$(get_maj_min "$_dev")"; then
_ret=0
fi
done
return $_ret
}
for_each_host_dev_and_slaves() {
local _func="$1"
local _dev
[[ "${host_devs[*]}" ]] || return 2
for _dev in "${host_devs[@]}"; do
[[ -b $_dev ]] || continue
check_block_and_slaves "$_func" "$(get_maj_min "$_dev")" && return 0
done
return 1
}
# /sys/dev/block/major:minor is symbol link to real hardware device
# go downstream $(realpath /sys/dev/block/major:minor) to detect driver
get_blockdev_drv_through_sys() {
local _block_mods=""
local _path
_path=$(realpath "$1")
while true; do
if [[ -L "$_path"/driver/module ]]; then
_mod=$(realpath "$_path"/driver/module)
_mod=$(basename "$_mod")
_block_mods="$_block_mods $_mod"
fi
_path=$(dirname "$_path")
if [[ $_path == '/sys/devices' ]] || [[ $_path == '/' ]]; then
break
fi
done
echo "$_block_mods"
}
# ugly workaround for the lvm design
# There is no volume group device,
# so, there are no slave devices for volume groups.
# Logical volumes only have the slave devices they really live on,
# but you cannot create the logical volume without the volume group.
# And the volume group might be bigger than the devices the LV needs.
check_vol_slaves() {
local _vg _pv _dm _majmin
_majmin="$2"
_dm=/sys/dev/block/$_majmin/dm
[[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1
_vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")")
# strip space
_vg="${_vg//[[:space:]]/}"
if [[ $_vg ]]; then
for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do
check_block_and_slaves "$1" "$(get_maj_min "$_pv")" && return 0
done
fi
return 1
}
check_vol_slaves_all() {
local _vg _pv _majmin
_majmin="$2"
_dm="/sys/dev/block/$_majmin/dm"
[[ -f $_dm/uuid && $(< "$_dm"/uuid) =~ LVM-* ]] || return 1
_vg=$(dmsetup splitname --noheadings -o vg_name "$(< "$_dm/name")")
# strip space
_vg="${_vg//[[:space:]]/}"
if [[ $_vg ]]; then
# when filter/global_filter is set, lvm may be failed
if ! lvm lvs --noheadings -o vg_name "$_vg" 2> /dev/null 1> /dev/null; then
return 1
fi
for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2> /dev/null); do
check_block_and_slaves_all "$1" "$(get_maj_min "$_pv")"
done
return 0
fi
return 1
}
# fs_get_option <filesystem options> <search for option>
# search for a specific option in a bunch of filesystem options
# and return the value
fs_get_option() {
local _fsopts=$1
local _option=$2
local OLDIFS="$IFS"
IFS=,
# shellcheck disable=SC2086
set -- $_fsopts
IFS="$OLDIFS"
while [ $# -gt 0 ]; do
case $1 in
$_option=*)
echo "${1#"${_option}"=}"
break
;;
esac
shift
done
}
check_kernel_config() {
local _config_opt="$1"
local _config_file
[[ -f $dracutsysrootdir/boot/config-$kernel ]] \
&& _config_file="/boot/config-$kernel"
[[ -f $dracutsysrootdir/lib/modules/$kernel/config ]] \
&& _config_file="/lib/modules/$kernel/config"
# no kernel config file, so return true
[[ $_config_file ]] || return 0
grep -q -F "${_config_opt}=" "$dracutsysrootdir$_config_file" && return 0
return 1
}
# 0 if the kernel module is either built-in or available
# 1 if the kernel module is not enabled
check_kernel_module() {
modprobe -d "$dracutsysrootdir" -S "$kernel" --dry-run "$1" &> /dev/null || return 1
}
# get_cpu_vendor
# Only two values are returned: AMD or Intel
get_cpu_vendor() {
if grep -qE AMD /proc/cpuinfo; then
printf "AMD"
fi
if grep -qE Intel /proc/cpuinfo; then
printf "Intel"
fi
}
# get_host_ucode
# Get the hosts' ucode file based on the /proc/cpuinfo
get_ucode_file() {
local family
local model
local stepping
family=$(grep -E "cpu family" /proc/cpuinfo | head -1 | sed "s/.*:\ //")
model=$(grep -E "model" /proc/cpuinfo | grep -v name | head -1 | sed "s/.*:\ //")
stepping=$(grep -E "stepping" /proc/cpuinfo | head -1 | sed "s/.*:\ //")
if [[ "$(get_cpu_vendor)" == "AMD" ]]; then
if [[ $family -ge 21 ]]; then
printf "microcode_amd_fam%xh.bin" "$family"
else
printf "microcode_amd.bin"
fi
fi
if [[ "$(get_cpu_vendor)" == "Intel" ]]; then
# The /proc/cpuinfo are in decimal.
printf "%02x-%02x-%02x" "${family}" "${model}" "${stepping}"
fi
}
# Not every device in /dev/mapper should be examined.
# If it is an LVM device, touch only devices which have /dev/VG/LV symlink.
lvm_internal_dev() {
local dev_dm_dir=/sys/dev/block/$1/dm
[[ ! -f $dev_dm_dir/uuid || $(< "$dev_dm_dir"/uuid) != LVM-* ]] && return 1 # Not an LVM device
local DM_VG_NAME DM_LV_NAME DM_LV_LAYER
eval "$(dmsetup splitname --nameprefixes --noheadings --rows "$(< "$dev_dm_dir"/name)" 2> /dev/null)"
[[ ${DM_VG_NAME} ]] && [[ ${DM_LV_NAME} ]] || return 0 # Better skip this!
[[ ${DM_LV_LAYER} ]] || [[ ! -L /dev/${DM_VG_NAME}/${DM_LV_NAME} ]]
}
btrfs_devs() {
local _mp="$1"
btrfs device usage "$_mp" \
| while read -r _dev _; do
str_starts "$_dev" "/" || continue
_dev=${_dev%,}
printf -- "%s\n" "$_dev"
done
}
zfs_devs() {
local _mp="$1"
zpool list -H -v -P "${_mp%%/*}" | awk -F$'\t' '$2 ~ /^\// {print $2}' \
| while read -r _dev; do
realpath "${_dev}"
done
}
iface_for_remote_addr() {
# shellcheck disable=SC2046
set -- $(ip -o route get to "$1")
while [ $# -gt 0 ]; do
case $1 in
dev)
echo "$2"
return
;;
esac
shift
done
}
local_addr_for_remote_addr() {
# shellcheck disable=SC2046
set -- $(ip -o route get to "$1")
while [ $# -gt 0 ]; do
case $1 in
src)
echo "$2"
return
;;
esac
shift
done
}
peer_for_addr() {
local addr=$1
local qtd
# quote periods in IPv4 address
qtd=${addr//./\\.}
ip -o addr show \
| sed -n 's%^.* '"$qtd"' peer \([0-9a-f.:]\{1,\}\(/[0-9]*\)\?\).*$%\1%p'
}
netmask_for_addr() {
local addr=$1
local qtd
# quote periods in IPv4 address
qtd=${addr//./\\.}
ip -o addr show | sed -n 's,^.* '"$qtd"'/\([0-9]*\) .*$,\1,p'
}
gateway_for_iface() {
local ifname=$1 addr=$2
case $addr in
*.*) proto=4 ;;
*:*) proto=6 ;;
*) return ;;
esac
ip -o -$proto route show \
| sed -n "s/^default via \([0-9a-z.:]\{1,\}\) dev $ifname .*\$/\1/p"
}
# This works only for ifcfg-style network configuration!
bootproto_for_iface() {
local ifname=$1
local dir
# follow ifcfg settings for boot protocol
for dir in network-scripts network; do
[ -f "/etc/sysconfig/$dir/ifcfg-$ifname" ] && {
sed -n "s/BOOTPROTO=[\"']\?\([[:alnum:]]\{1,\}\)[\"']\?.*\$/\1/p" \
"/etc/sysconfig/$dir/ifcfg-$ifname"
return
}
done
}
is_unbracketed_ipv6_address() {
strglob "$1" '*:*' && ! strglob "$1" '\[*:*\]'
}
# Create an ip= string to set up networking such that the given
# remote address can be reached
ip_params_for_remote_addr() {
local remote_addr=$1
local ifname local_addr peer netmask gateway ifmac
[[ $remote_addr ]] || return 1
ifname=$(iface_for_remote_addr "$remote_addr")
[[ $ifname ]] || {
berror "failed to determine interface to connect to $remote_addr"
return 1
}
# ifname clause to bind the interface name to a MAC address
if [ -d "/sys/class/net/$ifname/bonding" ]; then
dinfo "Found bonded interface '${ifname}'. Make sure to provide an appropriate 'bond=' cmdline."
elif [ -e "/sys/class/net/$ifname/address" ]; then
ifmac=$(cat "/sys/class/net/$ifname/address")
[[ $ifmac ]] && printf 'ifname=%s:%s ' "${ifname}" "${ifmac}"
fi
bootproto=$(bootproto_for_iface "$ifname")
case $bootproto in
dhcp | dhcp6 | auto6) ;;
dhcp4)
bootproto=dhcp
;;
static* | "")
bootproto=
;;
*)
derror "bootproto \"$bootproto\" is unsupported by dracut, trying static configuration"
bootproto=
;;
esac
if [[ $bootproto ]]; then
printf 'ip=%s:%s ' "${ifname}" "${bootproto}"
else
local_addr=$(local_addr_for_remote_addr "$remote_addr")
[[ $local_addr ]] || {
berror "failed to determine local address to connect to $remote_addr"
return 1
}
peer=$(peer_for_addr "$local_addr")
# Set peer or netmask, but not both
[[ $peer ]] || netmask=$(netmask_for_addr "$local_addr")
gateway=$(gateway_for_iface "$ifname" "$local_addr")
# Quote IPv6 addresses with brackets
is_unbracketed_ipv6_address "$local_addr" && local_addr="[$local_addr]"
is_unbracketed_ipv6_address "$peer" && peer="[$peer]"
is_unbracketed_ipv6_address "$gateway" && gateway="[$gateway]"
printf 'ip=%s:%s:%s:%s::%s:none ' \
"${local_addr}" "${peer}" "${gateway}" "${netmask}" "${ifname}"
fi
}
# block_is_nbd <maj:min>
# Check whether $1 is an nbd device
block_is_nbd() {
[[ -b /dev/block/$1 && $1 == 43:* ]]
}
# block_is_iscsi <maj:min>
# Check whether $1 is an iSCSI device
block_is_iscsi() {
local _dir
local _dev=$1 _real _sess
[[ -L "/sys/dev/block/$_dev" ]] || return
_dir="$(readlink -f "/sys/dev/block/$_dev")" || return
until [[ -d "$_dir/sys" || -d "$_dir/iscsi_session" ]]; do
_dir="$_dir/.."
done
[[ -d "$_dir/iscsi_session" ]] && {
_real=$(realpath "$_dir")
_sess=${_real##*/}
[[ -f "$_real/iscsi_session/$_sess/initiatorname" ]]
}
}
# block_is_fcoe <maj:min>
# Check whether $1 is an FCoE device
# Will not work for HBAs that hide the ethernet aspect
# completely and present a pure FC device
block_is_fcoe() {
local _dir
local _dev=$1
[[ -L "/sys/dev/block/$_dev" ]] || return
_dir="$(readlink -f "/sys/dev/block/$_dev")"
until [[ -d "$_dir/sys" ]]; do
_dir="$_dir/.."
if [[ -d "$_dir/subsystem" ]]; then
subsystem=$(basename "$(readlink "$_dir"/subsystem)")
[[ $subsystem == "fcoe" ]] && return 0
fi
done
return 1
}
# block_is_netdevice <maj:min>
# Check whether $1 is a net device
block_is_netdevice() {
block_is_nbd "$1" || block_is_iscsi "$1" || block_is_fcoe "$1"
}
# convert the driver name given by udevadm to the corresponding kernel module name
get_module_name() {
local dev_driver
while read -r dev_driver; do
case "$dev_driver" in
mmcblk)
echo "mmc_block"
;;
*)
echo "$dev_driver"
;;
esac