[PVFS-developers] link-unlink-fix.patch

[Stuart White]

In mgr/meta/md_unlink.c, code exists that prevents the data files on
the IODs from being deleted when a symbolic link is removed.

   if(S_ISLNK(statbuf.st_mode)) {

It seems this code does not handle hard links properly.  If the number
of hard links on a file is greater than 1, the manager should still not
instruct the IODs to remove the data for the file.

Only when a regular file with the number of links == 1 is removed
should the actual data be removed on the IODs.

   if(S_ISLNK(statbuf.st_mode) || (S_ISREG(statbuf.st_mode) &&
(statbuf.st_nlink > 1))) {

The attached patch applies to 1.6.3-pre2.

Feedback is appreciated.  Thanks!


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