Hi,
(Please Cc: me since I'm not subscribed to linux-fsdevel)
My initrd, which worked in 2.6.35, is broken in 2.6.36. I bisected it to this
commit:
commit 8df9d1a4142311c084ffeeacb67cd34d190eff74
Author: Miklos Szeredi <mszeredi@xxxxxxx>
Date: Tue Aug 10 11:41:41 2010 +0200
vfs: show unreachable paths in getcwd and proc
Prepend "(unreachable)" to path strings if the path is not reachable
from the current root.
My root partition is encrypted with dm-crypt, and the key is encrypted with a
passphrase using GnuPG and stored in the initrd. To set this up, the initrd
does:
gpg --quiet -d /boot/root-key.gpg | cryptsetup -h plain -c aes-xts-plain \
-s 512 create cryptroot /dev/sda3
To read the passphrase, gpg spawns pinentry-curses and configures it using
text commands on stdin. Since the above commit, this breaks when setting the
TTY from which to read the passphrase:
[pid 1129] readlink("/proc/self/fd/0", "(unreachable)/dev/console"..., 4095)
= 25
[pid 1129] write(7, "OPTION ttyname=(unreachable)/dev/console", 40
<unfinished ...>
[pid 1132] <... read resumed> "OPTION ttyname=(unreachable)/dev/console",
1002) = 40
[pid 1132] open("(unreachable)/dev/console", O_RDONLY) = -1 ENOENT (No such
file or directory)
I suppose the real bug is that /dev/console is considered unreachable, when
(according to strace) no process has done chroot() and the initrd has a
functioning /dev/console:
crw-r--r-- 1 root root 5, 1 1 jul 2007 dev/console
--
Karl-Johan Karlsson
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