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/*
Copyright (C) 1994, 1995, 1996 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
/* Free the list of modification requests MR */
static void
free_modreqs (struct modreq *mr)
{
struct modreq *tmp;
for (; mr; mr = tmp)
{
mach_port_deallocate (mach_task_self (), mr->port);
tmp = mr->next;
free (mr);
}
}
/* Node NP now has no more references; clean all state. The
diskfs_node_refcnt_lock must be held, and will be released
upon return. NP must be locked. */
void
diskfs_drop_node (struct node *np)
{
mode_t savemode;
if (np->dn_stat.st_nlink == 0)
{
diskfs_check_readonly ();
assert (!diskfs_readonly);
if (np->dn_stat.st_mode & S_IPTRANS)
diskfs_set_translator (np, 0, 0, 0);
if (np->allocsize != 0
|| (diskfs_create_symlink_hook
&& S_ISLNK (np->dn_stat.st_mode)
&& np->dn_stat.st_size))
{
/* If the node needs to be truncated, then a complication
arises, because truncation might require gaining
new references to the node. So, we give ourselves
a reference back, unlock the refcnt lock. Then
we are in the state of a normal user, and do the truncate
and an nput. The next time through, this routine
will notice that the size is zero, and not have to
do anything. */
np->references++;
spin_unlock (&diskfs_node_refcnt_lock);
diskfs_truncate (np, 0);
/* Force allocsize to zero; if truncate consistently fails this
will at least prevent an infinite loop in this routine. */
np->allocsize = 0;
diskfs_nput (np);
return;
}
assert (np->dn_stat.st_size == 0);
savemode = np->dn_stat.st_mode;
np->dn_stat.st_mode = 0;
np->dn_stat.st_rdev = 0;
np->dn_set_ctime = np->dn_set_atime = 1;
diskfs_node_update (np, diskfs_synchronous);
diskfs_free_node (np, savemode);
}
else
diskfs_node_update (np, diskfs_synchronous);
fshelp_drop_transbox (&np->transbox);
if (np->dirmod_reqs)
free_modreqs (np->dirmod_reqs);
if (np->filemod_reqs)
free_modreqs (np->filemod_reqs);
assert (!np->sockaddr);
diskfs_node_norefs (np);
spin_unlock (&diskfs_node_refcnt_lock);
}
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