Problems removing non-empty directory through NFS

[freebsd at top-consulting.net]

I have a NFS server configured on FreeBSD 9.0 Beta2 that only serves a  
share through NFS v3 TCP. All the processes ( mountd, rpcbind, lockd,  
etc ) are started with -h <local ip> on both the server and the clients.

The NFS clients range from FreeBSD 6.1 to 8.2.

On all the clients, it is impossible for me to erase a directory that  
contains other data and is from that NFS share. I get this error:


rm -rf nick/
rm: fts_read: Input/output error

same is true if I give the full path:

rm -rf /usr/nfs.mount/nick
rm: fts_read: Input/output error

if the directory is empty, I can use rm -rf or rmdir without problems.

Besides this I can read all the files, erase files, chmod, chown, etc  
without any problem. I just can't erase directories.

Running a truss on the rm -rf shows ( towards the end ):



lseek(4,0x0,SEEK_SET)                            = 0 (0x0)
close(4)                                         = 0 (0x0)
stat("new",{mode=drwx------ ,inode=53090640,size=512,blksize=4096}) = 0 (0x0)
open("new",O_NONBLOCK,027757765430)              = 4 (0x4)
fstat(4,{mode=drwx------ ,inode=53090640,size=512,blksize=4096}) = 0 (0x0)
fcntl(4,F_SETFD,FD_CLOEXEC)                      = 0 (0x0)
fstatfs(0x4,0xbfbfe8c0)                          = 0 (0x0)
fstat(4,{mode=drwx------ ,inode=53090640,size=512,blksize=4096}) = 0 (0x0)
fchdir(0x4)                                      = 0 (0x0)
getdirentries(0x4,0x8051000,0x1000,0x8050014)    = 512 (0x200)
getdirentries(0x4,0x8051000,0x1000,0x8050014)    = 0 (0x0)
lseek(4,0x0,SEEK_SET)                            = 0 (0x0)
close(4)                                         = 0 (0x0)
open("..",O_RDONLY,00)                           = 4 (0x4)
fstat(4,{mode=drwx------ ,inode=53090635,size=512,blksize=4096}) = 0 (0x0)
fchdir(0x4)                                      = 0 (0x0)
close(4)                                         = 0 (0x0)
rmdir(0x80525a8)                                 = 0 (0x0)
unlink("dovecot.index.log")                      = 0 (0x0)
unlink("dovecot.index.cache")                    = 0 (0x0)
unlink("dovecot-uidlist")                        = 0 (0x0)
unlink("dovecot.index.log.2")                    = 0 (0x0)
unlink("dovecot.index")                          = 0 (0x0)
open("..",O_RDONLY,00)                           ERR#5 'Input/output error'
rm: write(2,"rm: ",4)                            = 4 (0x4)
fts_readwrite(2,"fts_read",8)                            = 8 (0x8)
: write(2,": ",2)                                        = 2 (0x2)
Input/output error
write(2,"Input/output error\n",19)               = 19 (0x13)
exit(0x1)
process exit, rval = 256



There are no errors visible on the server.

Here is the output of nfsstat on the server:


Server Info:
   Getattr   Setattr    Lookup  Readlink      Read     Write    Create  
    Remove
107929047  19257084 240622998       121  11209701  19004949         0   
  8754163
    Rename      Link   Symlink     Mkdir     Rmdir   Readdir  RdirPlus  
    Access
   4115334   1108983        38      1845  15557465  14771644         0  
110311954
     Mknod    Fsstat    Fsinfo  PathConf    Commit
         0   4492462        47         0  14146384
Server Ret-Failed
                 0
Server Faults
             0
Server Cache Stats:
    Inprog      Idem  Non-idem    Misses
         0         0         0 579078451
Server Write Gathering:
  WriteOps  WriteRPC   Opsaved
  19004949  19004949         0


Anyone has any ideas what might be causing this ?