nvmecontrol: improve namespace size unit of devlist command output

[wanpengqian_gmail.com]

Summary

Add an option of -h --human to output human readable size unit instead of the fixed unit (MB).

Signed-off-by: Wanpeng Qian <[e-mail]>

Test Plan

For vary disk sizes, check the command output.

[wanpengqian_gmail.com]

fix typo.

[wanpengqian_gmail.com]

kill goto.

[wanpengqian_gmail.com]

sbin/nvmecontrol/devlist.c

140

When j == strlen(unit), which %c is \0, printf will not output the char. I search the web, people say it will teminate the output here. but the test seems OK.

[wanpengqian_gmail.com]

use humanize_number() instead of new wheel.

[pauamma_gundo.com]

sbin/nvmecontrol/nvmecontrol.8

219

Maybe also s/shows in/uses/ for consistency with the previous sentence, but that's a matter of taste. The typo itself is the important thing.

[wanpengqian_gmail.com]

fix typo and modify words as comment suggested.

[wanpengqian_gmail.com]

Add a B suffix to match the default one.

[pauamma_gundo.com]

Manual page looks good to me now.

[imp]

Looks good to me.
For me to commit it, I need either a 'Signed-off-by:' line or email [e-mail] a git-format-patch bundle with your preferred author name.

sbin/nvmecontrol/devlist.c

103

why 7?

[wanpengqian_gmail.com]

I have added the 'Signed-off-by:' line.

sbin/nvmecontrol/devlist.c

103

The /bin/df uses 6, since we have an extra suffix "B", I use 7 to match the result of df. The output contains 4 digits. it is readable yet enough to get more information.

[bcr]

Man page also looks good now.

[imp]

I'll use an author name of 'Wanpeng Qian <[e-mail]>' to commit this.
Please confirm.

[imp]

oh, I'm committing now, missed the signed-off-by line.