CVS commit: src/sys/fs/msdosfs

[Antti Kantee <pooka%netbsd.org@localhost>]

Module Name:    src
Committed By:   pooka
Date:           Wed Nov 14 19:16:29 UTC 2007

Modified Files:
        src/sys/fs/msdosfs: msdosfs_vnops.c

Log Message:
Fix a problem noticed by Reinoud: the fs would try to release an
unlocked vnode when trying to rename a directory.  The fix was to
shuffle some bits around and #pray.

The rename routine actually needs a very very major wide-angle whopping:
 * it takes locks out-of-order
 * it deals with references from SAVESTART lookups in interesting ways
 * I doubt there is any guarantee for correct operation if there
   are multiple concurrent accesses
 * the error branches might just as well call panic() directly


To generate a diff of this commit:
cvs rdiff -r1.42 -r1.43 src/sys/fs/msdosfs/msdosfs_vnops.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.