[BUG v1.4.6] `ubinfo -a' confused about non-consecutive UBI device numbers

[BUG v1.4.6] `ubinfo -a' confused about non-consecutive UBI device numbers

[Brian Foster]

Hello,

 Using mtd-utils v1.4.6 with a v2.6.36 Linux kernel,
 if I have non-consecutive UBI device numbers (in the
 example below, ‘ubi0’ and ‘ubi10’), then ‘ubinfo -a’,
 after printing the info for ‘ubi0’, errors with:

    ubinfo: error!: cannot get information about UBI device 1
            error 2 (No such file or directory)

 In case it matters, ‘ubi0’ was attached/mounted by
 kernel command-line (it's my rootfs).  My normal
 practice is for manually attached MTD and UBI device
 numbers to be the same (with 12(!) MTD devices this
 greatly reduces confusion!).

─────────────────────────────────────────────────────
# ubinfo --version
1.1
# 
# ubinfo -a		# Only `ubi0' (rootfs) is attached...
UBI version:                    1
Count of UBI devices:           1
UBI control device major/minor: 10:63
Present UBI devices:            ubi0

ubi0
Volumes count:                           1
[...]
# 
# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 02000000 00020000 "physmap-flash.0"
mtd1: 00004000 00000001 "maximasp-nvram"
mtd2: 00002000 00000001 "maximasp-snvram"
mtd3: 00200000 00020000 "u-boot"
mtd4: 00080000 00020000 "env0"
mtd5: 00080000 00020000 "env1"
mtd6: 00400000 00020000 "kernel0"
mtd7: 00400000 00020000 "kernel1"
mtd8: 00500000 00020000 "kernel2"
mtd9: 06400000 00020000 "root0"
mtd10: 06400000 00020000 "root1"
mtd11: 12800000 00020000 "other"
# 
# ubiattach -m10 -d10	# Now attach `mtd10' as `ubi10'...
UBI device number 10, total 800 LEBs (103219200 bytes, 98.4 MiB), \
   available 0 LEBs (0 bytes), LEB size 129024 bytes (126.0 KiB)
# 
# ubinfo -a		# `ubinfo -a' is now confused...
UBI version:                    1
Count of UBI devices:           2
UBI control device major/minor: 10:63
Present UBI devices:            ubi0, ubi10

ubi0
Volumes count:                           1
[...]

===================================

ubinfo: error!: cannot get information about UBI device 1
        error 2 (No such file or directory)
#
# ubinfo -d10		# However, `ubinfo -d10' is happy...
ubi10
Volumes count:                           1
[...]
# 
─────────────────────────────────────────────────────

 Notice that ‘ubinfo -a’ is fully and correctly aware of
 the attached devices, listing only ‘ubi0’ and ‘ubi10’.
 Nonetheless, it tries to print information about/from
 the non-existent ‘ubi1’.

 I have not investigated, nor tried other/recent versions.

cheers!
	-blf-

-- 
Brian Foster
Principal MTS, Software        |  La Ciotat, France
Maxim Integrated Products      |  Web:  http://www.maxim-ic.com/

Re: [BUG v1.4.6] `ubinfo -a' confused about non-consecutive UBI device numbers

[Brian Norris]

On Tue, Jan 24, 2012 at 1:24 AM, Brian Foster <brian.foster@maxim-ic.com> wrote:
>  Using mtd-utils v1.4.6 with a v2.6.36 Linux kernel,
>  if I have non-consecutive UBI device numbers (in the
>  example below, ‘ubi0’ and ‘ubi10’), then ‘ubinfo -a’,
>  after printing the info for ‘ubi0’, errors with:
>
>    ubinfo: error!: cannot get information about UBI device 1
>            error 2 (No such file or directory)
...
>  I have not investigated, nor tried other/recent versions.

Still present on current git. The fix doesn't look too bad. I'll
probably send a fix in the next few days.

Brian