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/**********************************************************
* node.c
*
* Copyright 2004, 2007, Stefan Siegl <stesie@brokenpipe.de>, Germany
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Publice License,
* version 2 or any later. The license is contained in the COPYING
* file that comes with the cvsfs distribution.
*
* code related to handling (aka create, etc.) netfs nodes
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "cvsfs.h"
#include "node.h"
#include <hurd/netfs.h>
#include <assert.h>
#include <stdio.h>
/* next file number (aka inode) we will assign */
extern volatile unsigned int next_fileno;
/* cvsfs_make_node
*
* create a struct node* for the specified netnode 'nn'.
*/
struct node *
cvsfs_make_node(struct netnode *nn)
{
struct node *node;
rwlock_writer_lock(&nn->lock);
if(nn->node)
{
/* there already is a node structure, just return another reference
* to this one, instead of wasting memory for yet another one
*/
mutex_lock(&nn->node->lock);
netfs_nref(nn->node);
mutex_unlock(&nn->node->lock);
rwlock_writer_unlock(&nn->lock);
return nn->node;
}
if(! (node = netfs_make_node(nn)))
{
rwlock_writer_unlock(&nn->lock);
return NULL;
}
/* put timestamp on file */
fshelp_touch(&node->nn_stat,
TOUCH_ATIME | TOUCH_MTIME | TOUCH_CTIME, cvsfs_maptime);
/* initialize stats of new node ... */
node->nn_stat.st_fstype = FSTYPE_MISC;
node->nn_stat.st_fsid = stat_template.fsid;
node->nn_stat.st_ino = nn->fileno;
node->nn_stat.st_mode = stat_template.mode;
node->nn_stat.st_nlink = 1;
node->nn_stat.st_uid = stat_template.uid;
node->nn_stat.st_gid = stat_template.gid;
node->nn_stat.st_size = 0;
node->nn_stat.st_blksize = 4096; /* is there a better default?? */
node->nn_stat.st_blocks = 0;
node->nn_stat.st_author = stat_template.author;
if(! nn->revision)
{
/* we're creating a node for a directory, mark as such! */
node->nn_stat.st_mode |= S_IFDIR;
/* since we got a directory we need to supply "executable"
* permissions, so our user is enabled to make use of this dir
*/
if(node->nn_stat.st_mode & S_IRUSR)
node->nn_stat.st_mode |= S_IXUSR;
if(node->nn_stat.st_mode & S_IRGRP)
node->nn_stat.st_mode |= S_IXGRP;
if(node->nn_stat.st_mode & S_IROTH)
node->nn_stat.st_mode |= S_IXOTH;
}
else
{
if(nn->revision->contents
&& ! config.nostats)
{
node->nn_stat.st_mode = nn->revision->perm;
node->nn_stat.st_size = nn->revision->length;
node->nn_stat.st_blocks = (node->nn_stat.st_size >> 9) + 1;
node->nn_stat.st_atim.tv_sec = nn->revision->time;
node->nn_stat.st_mtim.tv_sec = nn->revision->time;
node->nn_stat.st_ctim.tv_sec = nn->revision->time;
node->nn_stat.st_atim.tv_nsec = 0;
node->nn_stat.st_mtim.tv_nsec = 0;
node->nn_stat.st_ctim.tv_nsec = 0;
}
/* well, we're creating a new node for a file ... */
node->nn_stat.st_mode |= S_IFREG;
/* for now simply drop all execute permissions, this needs to be fixed,
* since CVS support executables, e.g. shell scripts, that we need to
* support .... FIXME
*/
node->nn_stat.st_mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH);
}
/* cvsfs is currently read only, check-ins etc. aren't yet supported,
* therefore drop permission to write
*/
node->nn_stat.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
nn->node = node;
rwlock_writer_unlock(&nn->lock);
return node;
}
struct node *
cvsfs_make_virtual_node(struct netnode *nn, struct revision *rev)
{
struct node *node;
struct netnode *new_nn;
if(! nn->revision)
return NULL; /* we don't create virtual nodes for directories */
/* we need a virtual netnode structure, pointing to the revision
* of choice ...
*/
new_nn = malloc(sizeof(*new_nn));
if(! new_nn)
return NULL;
rwlock_init(&new_nn->lock);
new_nn->sibling = NULL;
new_nn->parent = NULL;
new_nn->node = NULL; /* will be assigned by cvsfs_make_node */
new_nn->name = rev->id;
new_nn->revision = rev;
new_nn->fileno = next_fileno ++;
/* keep a pointer to the real nn structure in new_nn->child
* this is needed if we want to retrieve a version controlled file, since
* we got to climb up the whole path then ...
*/
new_nn->child = nn;
if(! (node = cvsfs_make_node(new_nn)))
{
free(new_nn);
return NULL;
}
return node;
}
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