Hello.
There ars
void write_super_lockfs(super_block *)
void unlockfs(super_block *)
in struct super_operations.
Ext3 and reiserfs have implementations of it.
But I cannot find callers of it and system calls for it.
There are some pathches such as
http://www.lifix.fi/listarchive/lkml/2001-08/msg00464.html
but it's not included in Linux 2.4.18/2.5.21.
drivers/md/lvm.c has only callers of functions in this patch
if defined LVM_VFS_ENHANCEMENT, but there aren't function bodys.
Q1: Who does use s_op->write_super_lockfs/unlockfs now?
Q2: How lockfs/unlockfs will be used in future?
Q3: Is it enable to implement of system calls for lockfs/unlockfs
without deadlocks?
Thanks in advance.
-----------
OHKUBO Katsuhiko ohkubo-k@suri.co.jp
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