[PATCH] ReiserFS: Make sure all dentries refs are released before calling kill_block_super()
Make sure all dentries refs are released before calling kill_block_super() so that the assumption that generic_shutdown_super() can completely destroy the dentry tree for there will be no external references holds true. What was being done in the put_super() superblock op, is now done in the kill_sb() filesystem op instead, prior to calling kill_block_super(). Changes made in [try #2]: (*) reiserfs_kill_sb() now checks that the superblock FS info pointer is set before trying to dereference it. Signed-off-by: David Howells <dhowells@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <reiserfs-dev@namesys.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -430,20 +430,29 @@ int remove_save_link(struct inode *inode, int truncate)
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return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
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}
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static void reiserfs_put_super(struct super_block *s)
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static void reiserfs_kill_sb(struct super_block *s)
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{
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struct reiserfs_transaction_handle th;
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th.t_trans_id = 0;
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if (REISERFS_SB(s)) {
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if (REISERFS_SB(s)->xattr_root) {
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d_invalidate(REISERFS_SB(s)->xattr_root);
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dput(REISERFS_SB(s)->xattr_root);
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REISERFS_SB(s)->xattr_root = NULL;
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}
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if (REISERFS_SB(s)->priv_root) {
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d_invalidate(REISERFS_SB(s)->priv_root);
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dput(REISERFS_SB(s)->priv_root);
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REISERFS_SB(s)->priv_root = NULL;
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}
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}
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kill_block_super(s);
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}
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static void reiserfs_put_super(struct super_block *s)
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{
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struct reiserfs_transaction_handle th;
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th.t_trans_id = 0;
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/* change file system state to current state if it was mounted with read-write permissions */
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if (!(s->s_flags & MS_RDONLY)) {
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@ -2156,7 +2165,7 @@ struct file_system_type reiserfs_fs_type = {
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.owner = THIS_MODULE,
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.name = "reiserfs",
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.get_sb = get_super_block,
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.kill_sb = kill_block_super,
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.kill_sb = reiserfs_kill_sb,
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.fs_flags = FS_REQUIRES_DEV,
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};
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