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/* Default hooks for filesystems
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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 "treefs.h"
/* Called to get the root node of the a filesystem, with a reference,
returning it in ROOT, or return an error if it can't be had. The default
hook just returns FSYS->root or an error if it's NULL. Note that despite
the similar name, this is very different from fsys_s_getroot! FSYS must
not be locked. */
error_t
_treefs_fsys_get_root (struct treefs_fsys *fsys, struct treefs_node **root)
{
mutex_lock (&fsys->lock);
*root = fsys->root;
if (*root != NULL)
treefs_node_ref (*root);
mutex_unlock (&fsys->lock);
return *root ? 0 : EOPNOTSUPP;
}
/* Called on a filesystem to create a new node in that filesystem, returning
it in NODE. DIR, if non-NULL, is the nominal parent directory, and MODE
and CRED are the desired mode and user info respectively. This hook
should also call node_init_stat & node_init to initialize the various user
bits. */
error_t
_treefs_fsys_create_node (struct treefs_fsys *fsys,
struct treefs_node *dir,
mode_t mode, struct treefs_protid *cred,
struct treefs_node **node)
{
error_t err = treefs_create_node (fsys, node);
if (err)
return err;
err = treefs_node_init_stat (*node, dir, mode, cred);
if (!err)
err = treefs_node_init (*node, dir, mode, cred);
if (S_ISDIR (mode))
{
treefs_dir_init (*node, dir, mode, cred);
treefs_mdir_init (*node, dir, mode, cred);
}
if (err)
{
/* There shouldn't be any other state to free at this point --
node_init_stat shouldn't do more than init the stat structure, and
if node_init fails, it should clean up after itself. */
treefs_free_node (*node);
return err;
}
return 0;
}
/* Called on a filesystem to destroy a node in that filesystem. This call
should *really* destroy it, i.e., it's only called once all references are
gone. */
void
_treefs_fsys_destroy_node (struct treefs_fsys *fsys, struct treefs_node *node)
{
if (treefs_node_isdir (node))
{
treefs_mdir_finalize (node);
treefs_dir_finalize (node);
}
treefs_node_finalize (node);
treefs_free_node (node);
}
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