Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1283671

Re: [PATCH v2 0/4] Add online file check feature

Show all headers | View raw

On Fri 2015-12-04 01:36:21, Gang He wrote:
> Hi Greg,
> 
> 
> >>> 
> > On Wed, Dec 02, 2015 at 07:05:27PM -0700, Gang He wrote:
> >> Hello Pavel,
> >> 
> >> 
> >> 
> >> >>> 
> >> > On Wed 2015-10-28 14:25:57, Gang He 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 "CHECK <inode>" > /sys/fs/ocfs2/devname/filecheck
> >> >> or
> >> >> $# echo "FIX <inode>" > /sys/fs/ocfs2/devname/filecheck
> >> >> 
> >> > 
> >> > Are you sure this is reasonable interface? I mean.... sysfs is
> >> > supposed to be one value per file. And I don't think its suitable for
> >> > running commands.
> >> Usually, the corrupted file (inode) should be rarely encountered for OCFS2 
> > file system, then
> >> lots of commands are executed via this interface with high performance is 
> > not expected by us.
> >> Second, after online file check is added, we also plan to add a mount option 
> > "error=fix", that means
> >> the file system can fix these errors automatically without a manual command 
> > triggering.
> > 
> > It's not a "performance" issue, it's a "sysfs files only have one value"
> > type thing.  Have two files, "inode_fix" and "inode_check" and then just
> > write the inode into them, no need to have a "verb <inode>" type parser.
> Current, we have three functional items "check, fix and set", in the future, maybe we can add more item.
> Then, for each functional item, we need to create a sys file and add related code (actual some code is duplicated),
> I prefer to one sys file to handle multiple sub-commands.

And we prefer not to have your code in tree.

Please design some reasonable interface. Abusing sysfs for this is not
right.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH v2 0/4] Add online file check feature Pavel Machek <pavel@ucw.cz> - 2015-12-02 19:30 +0100
  Re: [PATCH v2 0/4] Add online file check feature "Gang He" <ghe@suse.com> - 2015-12-03 03:10 +0100
    Re: [PATCH v2 0/4] Add online file check feature Greg KH <greg@kroah.com> - 2015-12-03 06:20 +0100
      Re: [PATCH v2 0/4] Add online file check feature "Gang He" <ghe@suse.com> - 2015-12-04 09:40 +0100
        Re: [PATCH v2 0/4] Add online file check feature Pavel Machek <pavel@ucw.cz> - 2015-12-04 10:30 +0100
        Re: [PATCH v2 0/4] Add online file check feature Greg KH <greg@kroah.com> - 2015-12-04 17:50 +0100
          Re: [PATCH v2 0/4] Add online file check feature "Gang He" <ghe@suse.com> - 2015-12-07 04:40 +0100

csiph-web