Re: Automatic `nodump' flag?

Date: Wed, 30 Jan 2008 16:13:54 -0600
From: Barry Pederson <bp@xxxxxxxxxx>
To: Kirk McKusick <mckusick@xxxxxxxxxxxx>
CC: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@xxxxxx>, questions@xxxxxxxxxxx,
fs@xxxxxxxxxxx
Subject: Re: Automatic `nodump' flag?
X-ASK-Info: Message Queued (2008/01/30 14:14:17)
X-ASK-Info: Confirmed by User (2008/01/30 16:37:01)

Kirk McKusick wrote:

The dump program runs on the raw disk partition dumping sequentially
by inode number. So, it has no idea of the file-tree hierarchy.

I was just looking at the source to dump, specifically traverse.c and
from what I can see, doesn't dump pass #2 scan through all directories
and then in the searchdir() function remove a directory's children from
the list of inodes to backup if the directory has the nodump flag?

---------
414 if (nodump) {
415 ip = getino(dp->d_ino, &mode);
416 if (TSTINO(dp->d_ino, dumpinomap)) {
417 CLRINO(dp->d_ino, dumpinomap);
418 *tapesize -= blockest(ip);
---------

Barry

You are completely correct. This does prune out everything below a
directory marked `nodump' even if those files are not also marked
`nodump'. Note that by default, level 0 dumps will ignore the
`nodump' flag. You have to use `-h 0' if you want a level 0 dump
to honor the `nodump' flag.

You would think I would remember code that I wrote (though in my
defense it was written over 20 years ago :-)

Kirk McKusick
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