Here's something pretty stupid about either the code in mount, df, or both. I'm on the verge of a denial of service if this lasts much longer. When I mount an nfs device more than once, I get this ridiculous output from df and mount:

#df
Filesystem  1K-blocks    Used   Avail Capacity  Mounted on
/dev/ad0s1a    253678  137554   95830    59%    /
devfs               1       1       0   100%    /dev
/dev/ad0s1e    253678      18  233366     0%    /tmp
/dev/ad0s1f   7782878 3273986 3886262    46%    /usr
/dev/ad0s1d    253678  125386  107998    54%    /var
devfs               1       1       0   100%    /var/named/dev
dell:/nfs     8883912 4104516 4779396    46%    /dellbak
dell:/nfs     8883912 4104516 4779396    46%    /dellbak
dell:/nfs     8883912 4104516 4779396    46%    /dellbak
dell:/nfs     8883912 4104516 4779396    46%    /dellbak
dell:/nfs     8883912 4104516 4779396    46%    /dellbak
dell:/nfs     8883912 4104516 4779396    46%    /dellbak

#mount
/dev/ad0s1a on / (ufs, NFS exported, local)
devfs on /dev (devfs, local)
/dev/ad0s1e on /tmp (ufs, local, soft-updates)
/dev/ad0s1f on /usr (ufs, NFS exported, local, soft-updates)
/dev/ad0s1d on /var (ufs, NFS exported, local)
devfs on /var/named/dev (devfs, local)
dell:/nfs on /dellbak (nfs)
dell:/nfs on /dellbak (nfs)
dell:/nfs on /dellbak (nfs)
dell:/nfs on /dellbak (nfs)
dell:/nfs on /dellbak (nfs)
dell:/nfs on /dellbak (nfs)

Ha, ha! How many times will this last line repeat itself? I'm curious to see if I can get it to give me a screenful of data. Will this eventually crash the kernel or fill some buffer up? All I'm doing is mounting the same nfs drive over and over. Normally, mounting a device twice will just give a "device busy" or something. Is there some sanity check missing that will prevent mount_nfs from actually mounting the same resource at the same mount point over and over?

Details:
* FreeBSD 5.3. Updated and compiled in mid-February. I froze it there and may soon upgrade to 5.4, but I don't count on this fixing this issue.


* I needed to make sure I had an nfs drive mounted properly, even after a reboot, but didn't want to (couldn't?) put it in fstab. So cron has this particular line(s).

44 10 * * * /sbin/mount_nfs -s -x 2 -T dell:/nfs /dellbak

* I am connecting to a local net NFS server running Windows 2000 and Services for UNIX 3.5. Due to some major problems with rebooting and NFS, I determined that I needed some of the special commands (-s -x 2) to enable the server to reboot.

* I put the mount_nfs command in cron and in an rc.d startup script because I didn't see a way to put all of the options in fstab, nor did I particularly enjoy booting the FreeBSD server without connecting to the NFS drive.... I would fill up my root directory pretty fast.

* Look at the fsid for /dellbak below, using verbose output.  Pretty odd.

# mount -v
/dev/ad0s1a on / (ufs, NFS exported, local, writes: sync 165 async 29170, reads: sync 2308 async 45, fsid f044aa41725bf386)
devfs on /dev (devfs, local, fsid 01ff000404000000)
/dev/ad0s1e on /tmp (ufs, local, soft-updates, writes: sync 9 async 4002, reads: sync 125 async 0, fsid f144aa411e8f31da)
/dev/ad0s1f on /usr (ufs, NFS exported, local, soft-updates, writes: sync 420 async 129755, reads: sync 170752 async 1401, fsid f144aa4134661c3c)
/dev/ad0s1d on /var (ufs, NFS exported, local, writes: sync 32187 async 49433, reads: sync 4043 async 102, fsid f244aa416aeef171)
devfs on /var/named/dev (devfs, local, fsid 02ff000404000000)
dell:/nfs on /dellbak (nfs, fsid 03ff000202000000)
dell:/nfs on /dellbak (nfs, fsid 04ff000202000000)
dell:/nfs on /dellbak (nfs, fsid 05ff000202000000)
dell:/nfs on /dellbak (nfs, fsid 06ff000202000000)
dell:/nfs on /dellbak (nfs, fsid 07ff000202000000)
dell:/nfs on /dellbak (nfs, fsid 08ff000202000000)



Any help? Thanks. BN _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"

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