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Re: [PATCH] xfs_io: implement 'inode' command V6

To: Brian Foster <bfoster@xxxxxxxxxx>
Subject: Re: [PATCH] xfs_io: implement 'inode' command V6
From: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
Date: Mon, 22 Feb 2016 11:25:30 +0100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20160219175508.GD27263@xxxxxxxxxxxxxxx>
Mail-followup-to: Brian Foster <bfoster@xxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <1455814159-14191-1-git-send-email-cmaiolino@xxxxxxxxxx> <20160219175508.GD27263@xxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.24 (2015-08-30)
Hey,

> > +   if (optind < argc) {
> > +
> > +           if (ret_next) {
> > +                   cmd = XFS_IOC_FSBULKSTAT;
> > +           } else {
> > +                   if (argc > 2)
> > +                           return command_usage(&inode_cmd);
> 
> FYI, this means one can't do the following:
> 
>   xfs_io -c "inode -v 123" <mnt>
> 
> Otherwise it looks good to me:
> 
> Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
> 
Thanks, I'm not sure how I didn't notice this, I thought I had tested all
options with verbose mode.

I believe I can fix this with this:

-                       if (argc > 2)
+                       if (argc > 2 && !verbose)

I must check the amount of arguments, so nobody can pass 2 inode numbers. Bu I
believe with this change I can fix it.

I'm testing it right now, and will send a patch with this change after I test
all the remaining options.

Cheers
> > +                   else
> > +                           cmd = XFS_IOC_FSBULKSTAT_SINGLE;
> > +           }
> > +
> > +           userino = strtoull(argv[optind], &p, 10);
> > +           if ((*p != '\0')) {
> > +                   printf(_("[num] must be a numeric value\n"));
> > +                   exitcode = 1;
> > +                   return 0;
> > +           }
> > +
> > +           bulkreq.lastip = &userino;
> > +           bulkreq.icount = 1;
> > +           bulkreq.ubuffer = &bstat;
> > +           bulkreq.ocount = &count;
> > +
> > +           if (xfsctl(file->name, file->fd, cmd, &bulkreq)) {
> > +                   if (errno == EINVAL) {
> > +                           if (!ret_next)
> > +                                   printf("0\n");
> > +                   } else {
> > +                           perror("xfsctl");
> > +                   }
> > +                   exitcode = 1;
> > +                   return 0;
> > +           }
> > +
> > +           if (ret_next)
> > +                   userino = bstat.bs_ino;
> > +
> > +           if (verbose)
> > +                   printf("%llu:%d\n",
> > +                          userino,
> > +                          userino > XFS_MAXINUMBER_32 ? 64 : 32);
> > +           else
> > +                   /* Inode in use */
> > +                   printf("%llu\n", userino);
> > +           return 0;
> > +
> > +   /* -n option must not be used stand alone */
> > +   } else if (ret_next) {
> > +           return command_usage(&inode_cmd);
> > +   }
> > +
> > +   bulkreq.lastip = &last;
> > +   bulkreq.icount = 1024; /* User-defined maybe!? */
> > +   bulkreq.ubuffer = &igroup;
> > +   bulkreq.ocount = &count;
> > +
> > +   for (;;) {
> > +           if (xfsctl(file->name, file->fd, XFS_IOC_FSINUMBERS,
> > +                           &bulkreq)) {
> > +                   perror("XFS_IOC_FSINUMBERS");
> > +                   exitcode = 1;
> > +                   return 0;
> > +           }
> > +
> > +           if (count == 0)
> > +                   break;
> > +
> > +           lastgrp = count;
> > +   }
> > +
> > +   lastgrp--;
> > +   lastino = igroup[lastgrp].xi_startino +
> > +             xfs_highbit64(igroup[lastgrp].xi_allocmask);
> > +
> > +   if (verbose)
> > +           printf("%llu:%d\n", lastino,
> > +                   lastino > XFS_MAXINUMBER_32 ? 64 : 32);
> > +   else
> > +           printf("%d\n", lastino > XFS_MAXINUMBER_32 ? 1 : 0);
> > +
> > +   return 0;
> > +}
> > +
> >  void
> >  open_init(void)
> >  {
> > @@ -815,6 +954,16 @@ open_init(void)
> >             _("get/set preferred extent size (in bytes) for the open file");
> >     extsize_cmd.help = extsize_help;
> >  
> > +   inode_cmd.name = "inode";
> > +   inode_cmd.cfunc = inode_f;
> > +   inode_cmd.args = _("[-n | -v] [num]");
> > +   inode_cmd.argmin = 0;
> > +   inode_cmd.argmax = 2;
> > +   inode_cmd.flags = CMD_NOMAP_OK;
> > +   inode_cmd.oneline =
> > +           _("Query inode number usage in the filesystem");
> > +   inode_cmd.help = inode_help;
> > +
> >     add_command(&open_cmd);
> >     add_command(&stat_cmd);
> >     add_command(&close_cmd);
> > @@ -822,4 +971,5 @@ open_init(void)
> >     add_command(&chproj_cmd);
> >     add_command(&lsproj_cmd);
> >     add_command(&extsize_cmd);
> > +   add_command(&inode_cmd);
> >  }
> > -- 
> > 2.4.3
> > 
> > _______________________________________________
> > xfs mailing list
> > xfs@xxxxxxxxxxx
> > http://oss.sgi.com/mailman/listinfo/xfs

-- 
Carlos

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