int IMFS_mknod(
const rtems_filesystem_location_info_t *parentloc,
const char *name,
size_t namelen,
mode_t mode,
dev_t dev
)
{
int rv = 0;
IMFS_jnode_types_t type;
IMFS_types_union info;
IMFS_jnode_t *new_node;
get_type_and_info_by_mode_and_dev( mode, dev, &type, &info );
new_node = IMFS_create_node( parentloc, type, name, namelen, mode, &info );
if ( new_node != NULL ) {
IMFS_jnode_t *parent = parentloc->node_access;
IMFS_update_ctime( parent );
IMFS_update_mtime( parent );
} else {
rv = -1;
}
return rv;
}
/*
* IMFS_memfile_extend
*
* This routine insures that the in-memory file is of the length
* specified. If necessary, it will allocate memory blocks to
* extend the file.
*/
MEMFILE_STATIC int IMFS_memfile_extend(
IMFS_jnode_t *the_jnode,
off_t new_length
)
{
unsigned int block;
unsigned int new_blocks;
unsigned int old_blocks;
/*
* Perform internal consistency checks
*/
IMFS_assert( the_jnode );
IMFS_assert( IMFS_type( the_jnode ) == IMFS_MEMORY_FILE );
/*
* Verify new file size is supported
*/
if ( new_length >= IMFS_MEMFILE_MAXIMUM_SIZE )
rtems_set_errno_and_return_minus_one( EINVAL );
/*
* Verify new file size is actually larger than current size
*/
if ( new_length <= the_jnode->info.file.size )
return 0;
/*
* Calculate the number of range of blocks to allocate
*/
new_blocks = new_length / IMFS_MEMFILE_BYTES_PER_BLOCK;
old_blocks = the_jnode->info.file.size / IMFS_MEMFILE_BYTES_PER_BLOCK;
/*
* Now allocate each of those blocks.
*/
for ( block=old_blocks ; block<=new_blocks ; block++ ) {
if ( IMFS_memfile_addblock( the_jnode, block ) ) {
for ( ; block>=old_blocks ; block-- ) {
IMFS_memfile_remove_block( the_jnode, block );
}
rtems_set_errno_and_return_minus_one( ENOSPC );
}
}
/*
* Set the new length of the file.
*/
the_jnode->info.file.size = new_length;
IMFS_update_ctime(the_jnode);
IMFS_update_mtime(the_jnode);
return 0;
}
int IMFS_mknod(
const char *token, /* IN */
mode_t mode, /* IN */
dev_t dev, /* IN */
rtems_filesystem_location_info_t *pathloc /* IN/OUT */
)
{
IMFS_token_types type = 0;
IMFS_jnode_t *new_node;
int result;
char new_name[ IMFS_NAME_MAX + 1 ];
IMFS_types_union info;
IMFS_get_token( token, strlen( token ), new_name, &result );
/*
* Figure out what type of IMFS node this is.
*/
if ( S_ISDIR(mode) )
type = IMFS_DIRECTORY;
else if ( S_ISREG(mode) )
type = IMFS_MEMORY_FILE;
else if ( S_ISBLK(mode) || S_ISCHR(mode) ) {
type = IMFS_DEVICE;
rtems_filesystem_split_dev_t( dev, info.device.major, info.device.minor );
} else if (S_ISFIFO(mode))
type = IMFS_FIFO;
else
IMFS_assert( 0 );
/*
* Allocate and fill in an IMFS jnode
*
* NOTE: Coverity Id 21 reports this as a leak.
* While technically not a leak, it indicated that IMFS_create_node
* was ONLY passed a NULL when we created the root node. We
* added a new IMFS_create_root_node() so this path no longer
* existed. The result was simpler code which should not have
* this path.
*/
new_node = IMFS_create_node( pathloc, type, new_name, mode, &info );
if ( !new_node )
rtems_set_errno_and_return_minus_one( ENOMEM );
IMFS_update_ctime(new_node->Parent);
IMFS_update_mtime(new_node->Parent);
return 0;
}
int IMFS_make_generic_node(
const char *path,
mode_t mode,
const IMFS_node_control *node_control,
void *context
)
{
int rv = 0;
mode &= ~rtems_filesystem_umask;
switch (mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
case S_IFIFO:
case S_IFREG:
break;
default:
errno = EINVAL;
rv = -1;
break;
}
if ( rv == 0 ) {
if ( node_control->imfs_type == IMFS_GENERIC ) {
rtems_filesystem_eval_path_context_t ctx;
int eval_flags = RTEMS_FS_FOLLOW_LINK
| RTEMS_FS_MAKE
| RTEMS_FS_EXCLUSIVE;
const rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
if ( IMFS_is_imfs_instance( currentloc ) ) {
IMFS_types_union info;
IMFS_jnode_t *new_node;
info.generic.context = context;
new_node = IMFS_create_node_with_control(
currentloc,
node_control,
rtems_filesystem_eval_path_get_token( &ctx ),
rtems_filesystem_eval_path_get_tokenlen( &ctx ),
mode,
&info
);
if ( new_node != NULL ) {
IMFS_jnode_t *parent = currentloc->node_access;
IMFS_update_ctime( parent );
IMFS_update_mtime( parent );
} else {
rv = -1;
}
} else {
rtems_filesystem_eval_path_error( &ctx, ENOTSUP );
rv = -1;
}
rtems_filesystem_eval_path_cleanup( &ctx );
} else {
errno = EINVAL;
rv = -1;
}
}
return rv;
}