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uuid.c: split uuid stuffs from util.c
Currently, 'make raid6check' is build broken since commit b068159 ("mdadm: load default sysfs attributes after assemblation"). /usr/bin/ld: sysfs.o: in function `sysfsline': sysfs.c:(.text+0x2707): undefined reference to `parse_uuid' /usr/bin/ld: sysfs.c:(.text+0x271a): undefined reference to `uuid_zero' /usr/bin/ld: sysfs.c:(.text+0x2721): undefined reference to `uuid_zero' Apparently, the compile of mdadm or raid6check are coupled with uuid functions inside util.c. However, we can't just add util.o to CHECK_OBJS which raid6check is needed, because it caused other worse problems. So, let's introduce a uuid.c file which is indenpended file to fix the problem, all the contents are splitted from util.c. Signed-off-by: Guoqing Jiang <[email protected]> Signed-off-by: Jes Sorensen <[email protected]>
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Guoqing Jiang
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Jes Sorensen
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May 19, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| /* | ||
| * mdadm - manage Linux "md" devices aka RAID arrays. | ||
| * | ||
| * Copyright (C) 2001-2013 Neil Brown <[email protected]> | ||
| * | ||
| * | ||
| * 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, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| * | ||
| * Author: Neil Brown | ||
| * Email: <[email protected]> | ||
| */ | ||
|
|
||
| #include <string.h> | ||
|
|
||
| const int uuid_zero[4] = { 0, 0, 0, 0 }; | ||
|
|
||
| int same_uuid(int a[4], int b[4], int swapuuid) | ||
| { | ||
| if (swapuuid) { | ||
| /* parse uuids are hostendian. | ||
| * uuid's from some superblocks are big-ending | ||
| * if there is a difference, we need to swap.. | ||
| */ | ||
| unsigned char *ac = (unsigned char *)a; | ||
| unsigned char *bc = (unsigned char *)b; | ||
| int i; | ||
| for (i = 0; i < 16; i += 4) { | ||
| if (ac[i+0] != bc[i+3] || | ||
| ac[i+1] != bc[i+2] || | ||
| ac[i+2] != bc[i+1] || | ||
| ac[i+3] != bc[i+0]) | ||
| return 0; | ||
| } | ||
| return 1; | ||
| } else { | ||
| if (a[0]==b[0] && | ||
| a[1]==b[1] && | ||
| a[2]==b[2] && | ||
| a[3]==b[3]) | ||
| return 1; | ||
| return 0; | ||
| } | ||
| } | ||
|
|
||
| void copy_uuid(void *a, int b[4], int swapuuid) | ||
| { | ||
| if (swapuuid) { | ||
| /* parse uuids are hostendian. | ||
| * uuid's from some superblocks are big-ending | ||
| * if there is a difference, we need to swap.. | ||
| */ | ||
| unsigned char *ac = (unsigned char *)a; | ||
| unsigned char *bc = (unsigned char *)b; | ||
| int i; | ||
| for (i = 0; i < 16; i += 4) { | ||
| ac[i+0] = bc[i+3]; | ||
| ac[i+1] = bc[i+2]; | ||
| ac[i+2] = bc[i+1]; | ||
| ac[i+3] = bc[i+0]; | ||
| } | ||
| } else | ||
| memcpy(a, b, 16); | ||
| } | ||
|
|
||
| /* | ||
| * Parse a 128 bit uuid in 4 integers | ||
| * format is 32 hexx nibbles with options :.<space> separator | ||
| * If not exactly 32 hex digits are found, return 0 | ||
| * else return 1 | ||
| */ | ||
| int parse_uuid(char *str, int uuid[4]) | ||
| { | ||
| int hit = 0; /* number of Hex digIT */ | ||
| int i; | ||
| char c; | ||
| for (i = 0; i < 4; i++) | ||
| uuid[i] = 0; | ||
|
|
||
| while ((c = *str++) != 0) { | ||
| int n; | ||
| if (c >= '0' && c <= '9') | ||
| n = c-'0'; | ||
| else if (c >= 'a' && c <= 'f') | ||
| n = 10 + c - 'a'; | ||
| else if (c >= 'A' && c <= 'F') | ||
| n = 10 + c - 'A'; | ||
| else if (strchr(":. -", c)) | ||
| continue; | ||
| else return 0; | ||
|
|
||
| if (hit<32) { | ||
| uuid[hit/8] <<= 4; | ||
| uuid[hit/8] += n; | ||
| } | ||
| hit++; | ||
| } | ||
| if (hit == 32) | ||
| return 1; | ||
| return 0; | ||
| } |