[Ocfs2-devel] [PATCH v3 0/4] Add online file check feature

[Andrew Morton]

On Fri, 25 Dec 2015 15:16:15 +0800 Gang He <ghe at suse.com> wrote:

> When there are errors in the ocfs2 filesystem,
> they are usually accompanied by the inode number which caused the error.
> This inode number would be the input to fixing the file.
> One of these options could be considered:
> A file in the sys filesytem which would accept inode numbers.
> This could be used to communication back what has to be fixed or is fixed.
> You could write:
> $# echo "<inode>" > /sys/fs/ocfs2/devname/filecheck/check
> or
> $# echo "<inode>" > /sys/fs/ocfs2/devname/filecheck/fix
> 
> Compare with second version, I re-design filecheck sysfs interfaces, there
> are three sysfs files(check, fix and set) under filecheck directory(see above),
> sysfs will accept only one argument <inode>. Second, I adjust some code in 
> ocfs2_filecheck_repair_inode_block() function according to upstream feedback,
> we cannot just add VALID_FL flag back as a inode block fix, then we will not 
> fix this field corruption currently until having a complete solution.
> Compare with first version, I use strncasecmp instead of double strncmp
> functions. Second, update the source file contribution vendor.

This feature should be documented, please.  That means all pseudo-file
locations, all inputs, all outputs, expected behaviour etc etc.  Enough
info so that our users can usefully and fully use this feature in the
minimum time.  Documentation/filesystems/ocfs2.txt is the place for that.