DragonFly- rel2_2 sys/vfs/msdosfs msdosfs_denode.c

Nicolas Thery nth at crater.dragonflybsd.org
Sun Mar 1 11:12:53 PST 2009

commit fe7717df0d7279d431d9d7a2b431ca452ea8dc46
Author: Nicolas Thery <nthery at gmail.com>
Date:   Sun Mar 1 20:03:45 2009 +0100

    msdosfs: fix deleted-but-open files handling.
    When deleting a file, msdosfs keeps its denode in the denode cache until it is
    reclaimed.  This causes a collision in the cache when recycling the directory
    entry of a deleted but still open file for a new or renamed file.  This
    collision was incorrecly handled resulting in a kernel panic (rename case) or
    syscall error and corrupted in-core state (new file case).
    Fix by allowing denodes pointing to the same directory entry to coexist in the
    cache as long as a single one of them represents an existing file.
    Reported-by: corecore@
    Dragonfly-bug: <http://bugs.dragonflybsd.org/issue1286>
    (cherry picked from commit 629f33a733bba046a296b5f1dfa4ef45bc388cb4)

Summary of changes:
 sys/vfs/msdosfs/msdosfs_denode.c |   26 +++++++++++++++++++++-----
 1 files changed, 21 insertions(+), 5 deletions(-)


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