[Bug 1473934] Strace Log
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Mon Jul 13 14:18:15 UTC 2015
------- Comment on attachment From ckumar27 at in.ibm.com 2015-07-13 14:13 EDT-------
strace -e open fdisk -l
strace -e open fdisk -l /dev/mapper/mpath0
Both commands gives same results (reading only /dev/sdx and /dev/hdx)
and in unable to read multipath disk. And looking at code it seems it is
meant to be so.
root at dilllp1:/# ll /dev/mapper/
total 0
drwxr-xr-x 2 root root 400 Jul 12 21:03 ./
drwxr-xr-x 13 root root 6400 Jul 12 21:03 ../
crw------- 1 root root 10, 236 Jul 12 20:46 control
lrwxrwxrwx 1 root root 7 Jul 13 08:41 mpath0 -> ../dm-0
brw------- 1 root root 252, 6 Jul 12 20:46 mpath0-part1
brw------- 1 root root 252, 7 Jul 12 20:46 mpath0-part2
brw------- 1 root root 252, 8 Jul 12 20:46 mpath0-part3
lrwxrwxrwx 1 root root 7 Jul 12 20:47 mpath1 -> ../dm-1
brw------- 1 root root 252, 9 Jul 12 20:46 mpath1-part1
brw------- 1 root root 252, 11 Jul 12 20:46 mpath1-part2
lrwxrwxrwx 1 root root 7 Jul 12 20:54 mpath2 -> ../dm-2
brw-rw---- 1 root disk 252, 16 Jul 12 20:47 mpath2-part1
brw-rw---- 1 root disk 252, 17 Jul 12 20:47 mpath2-part2
lrwxrwxrwx 1 root root 7 Jul 12 21:03 mpath3 -> ../dm-3
brw-rw---- 1 root disk 252, 13 Jul 12 21:03 mpath3p1
brw-rw---- 1 root disk 252, 14 Jul 12 21:03 mpath3-part1
lrwxrwxrwx 1 root root 7 Jul 12 20:52 mpath4 -> ../dm-4
lrwxrwxrwx 1 root root 7 Jul 12 20:47 mpath5 -> ../dm-5
lrwxrwxrwx 1 root root 8 Jul 12 20:47 mpath6 -> ../dm-10
lrwxrwxrwx 1 root root 8 Jul 12 21:03 mpath7 -> ../dm-12
root at dilllp1:/#
root at dilllp1:/#
root at dilllp1:/# ls -l /dev/dm-0
brw-rw---- 1 root disk 252, 0 Jul 13 08:41 /dev/dm-0
root at dilllp1:/#
Looking at code : fdisk.c
-----------------------
void try(char *device)
{
disk_device = device;
if (!setjmp(listingbuf)) {
if ((fd = open(disk_device, type_open)) >= 0) {
close(fd);
get_boot();
list_table();
if (partitions > 4)
delete_partition(ext_index);
} else {
/* Ignore other errors, since we try IDE
and SCSI hard disks which may not be
installed on the system. */
if(errno == EACCES) {
fprintf(stderr, "Cannot open %s\n", device);
exit(1);
}
}
}
}
void main(int argc, char **argv)
{
if (argc > 3)
fatal(usage);
if (argc > 1 && *argv[1] == '-') {
switch (*(argv[1] + 1)) {
case 'v':
printf("fdisk v" VERSION "\n");
exit(0);
case 'l':
listing = 1;
type_open = O_RDONLY;
try("/dev/hda");
try("/dev/hdb");
try("/dev/hdc");
try("/dev/hdd");
try("/dev/sda");
try("/dev/sdb");
try("/dev/sdc");
try("/dev/sdd");
try("/dev/sde");
try("/dev/sdf");
try("/dev/sdg");
try("/dev/sdh");
exit(0);
case 's': {
------------------------------------------------------------
** Attachment added: "Strace Log"
https://bugs.launchpad.net/bugs/1473934/+attachment/4428335/+files/strace.log
--
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to mac-fdisk in Ubuntu.
https://bugs.launchpad.net/bugs/1473934
Title:
ISST-LTE: pmac-fdisk doesn't work with mpath devices
Status in mac-fdisk package in Ubuntu:
New
Bug description:
---Problem Description---
1. fdisk -l doesn't work with mpath device:
% sudo fdisk -l /dev/mapper/mpath0
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Disk /dev/sda: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
/dev/sda1 1 1 135324277143551+ ee Unknown
Partition 1 does not end on cylinder boundary:
phys=(1023, 254, 63) should be (1023, 127, 32)
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Disk /dev/sdb: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
/dev/sdb1 1 1 21 42992 83 Linux native
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sdc: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sdd: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sde: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sdf: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sdg: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
The number of cylinders for this disk is set to 4252.
This is larger than 1024, and may cause problems with:
1) software that runs at boot time (e.g., LILO)
2) booting and partitioning software form other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Disk /dev/sdh: 128 heads, 32 sectors, 4252 cylinders
Units = cylinders of 4096 * 512 bytes
Device Boot Begin Start End Blocks Id System
%
2. when trying to partition a mpath device with fdisk, it asks user to
sed sectors and cylindes:
% sudo fdisk /dev/mapper/mpath4
You must set heads sectors and cylinders.
You can do this from the extra functions menu.
Warning: invalid flag 6f00 of partition table 4 will be corrected by w(rite)
Command (m for help): p
Disk /dev/mapper/mpath4: 0 heads, 0 sectors, 0 cylinders
Units = cylinders of 1 * 512 bytes
Device Boot Begin Start End Blocks Id
System
Command (m for help): n
You must set heads sectors and cylinders.
You can do this from the extra functions menu.
Command (m for help):
3.fdisk will show a wrong partition name:
% ls /dev/mapper/mpath3-part1
/dev/mapper/mpath3-part1
% sudo fdisk /dev/mapper/mpath3
You must set heads sectors and cylinders.
You can do this from the extra functions menu.
Command (m for help): p
Disk /dev/mapper/mpath3: 0 heads, 0 sectors, 0 cylinders
Units = cylinders of 1 * 512 bytes
Device Boot Begin Start End Blocks Id System
/dev/mapper/mpath31 63 2554287104277143551+ ee Unknown
Command (m for help):
---uname output---
Linux dilllp1 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = na
---Debugger---
A debugger is not configured
---Steps to Reproduce---
1. install ubuntu 14.04.3 on a system which has mpath devices
2. using "fdisk" to check mpath device:
* fdisk -l <mpath device>
* fdisk <mpath device> (partition the device)
Userspace tool common name: fdisk(symbol link to pmac-fdisk)
The userspace tool has the following bit modes: 64-bit
Userspace package: pmac-fdisk, version: 0.1-16ubuntu2
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