int chroot(
const char *pathname
)
{
int result;
rtems_filesystem_location_info_t loc;
/* an automatic call to new private env the first time */
if (rtems_current_user_env == &rtems_global_user_env) {
rtems_libio_set_private_env(); /* try to set a new private env*/
if (rtems_current_user_env == &rtems_global_user_env) /* not ok */
rtems_set_errno_and_return_minus_one( ENOTSUP );
};
result = chdir(pathname);
if (result) {
rtems_set_errno_and_return_minus_one( errno );
};
/* clone the new root location */
if (rtems_filesystem_evaluate_path(".", 0, &loc, 0)) {
/* our cwd has changed, though - but there is no easy way of return :-( */
rtems_set_errno_and_return_minus_one( errno );
}
rtems_filesystem_freenode(&rtems_filesystem_root);
rtems_filesystem_root = loc;
return 0;
}
/**
* Get the file system data from the specific path. Checks to make sure the path is
* pointing to a valid RFS file system.
*/
static int
rtems_rfs_get_fs (const char* path, rtems_rfs_file_system** fs)
{
struct statvfs sb;
int rc;
rc = statvfs (path, &sb);
if (rc < 0)
{
printf ("error: cannot statvfs path: %s: (%d) %s\n",
path, errno, strerror (errno));
return -1;
}
if (sb.f_fsid != RTEMS_RFS_SB_MAGIC)
{
printf ("error: path '%s' is not on an RFS file system\n", path);
return -1;
}
#if __rtems__
/*
* Now find the path location on the file system. This will give the file
* system data.
*/
{
rtems_filesystem_location_info_t pathloc;
rc = rtems_filesystem_evaluate_path (path, strlen (path), 0, &pathloc, true);
*fs = rtems_rfs_rtems_pathloc_dev (&pathloc);
rtems_filesystem_freenode (&pathloc);
}
#endif
return rc;
}
int chmod(
const char *path,
mode_t mode
)
{
int status;
rtems_filesystem_location_info_t loc;
int result;
status = rtems_filesystem_evaluate_path( path, strlen( path ), 0, &loc, true );
if ( status != 0 )
return -1;
if ( !loc.handlers ){
rtems_filesystem_freenode( &loc );
rtems_set_errno_and_return_minus_one( EBADF );
}
if ( !loc.handlers->fchmod_h ){
rtems_filesystem_freenode( &loc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.handlers->fchmod_h)( &loc, mode );
rtems_filesystem_freenode( &loc );
return result;
}
rtems_status_code rtems_libio_set_private_env(void) {
rtems_status_code sc;
rtems_id task_id;
rtems_filesystem_location_info_t loc;
sc=rtems_task_ident(RTEMS_SELF,0,&task_id);
if (sc != RTEMS_SUCCESSFUL) return sc;
/* Only for the first time a malloc is necesary */
if (rtems_current_user_env==&rtems_global_user_env) {
rtems_user_env_t *tmp = malloc(sizeof(rtems_user_env_t));
if (!tmp)
return RTEMS_NO_MEMORY;
#ifdef HAVE_USERENV_REFCNT
tmp->refcnt = 1;
#endif
sc = rtems_task_variable_add(RTEMS_SELF,(void*)&rtems_current_user_env,(void(*)(void *))free_user_env);
if (sc != RTEMS_SUCCESSFUL) {
/* don't use free_user_env because the pathlocs are
* not initialized yet
*/
free(tmp);
return sc;
}
rtems_current_user_env = tmp;
};
*rtems_current_user_env = rtems_global_user_env; /* get the global values*/
rtems_current_user_env->task_id=task_id; /* mark the local values*/
/* Clone the pathlocs. In contrast to most other
* code we must _not_ free the original locs because
* what we are trying to do here is forking off
* clones. The reason is a pathloc can be allocated by the
* file system and needs to be freed when deleting the environment.
*/
rtems_filesystem_evaluate_path("/", 1, 0, &loc, 0);
rtems_filesystem_root = loc;
rtems_filesystem_evaluate_path("/", 1, 0, &loc, 0);
rtems_filesystem_current = loc;
return RTEMS_SUCCESSFUL;
}
int fchdir(
int fd
)
{
rtems_libio_t *iop;
rtems_filesystem_location_info_t loc, saved;
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
rtems_libio_check_is_open(iop);
/*
* Verify you can change directory into this node.
*/
if ( !iop->pathinfo.ops ) {
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
if ( !iop->pathinfo.ops->node_type_h ) {
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
if ( (*iop->pathinfo.ops->node_type_h)( &iop->pathinfo ) !=
RTEMS_FILESYSTEM_DIRECTORY ) {
rtems_set_errno_and_return_minus_one( ENOTDIR );
}
/*
* FIXME : I feel there should be another call to
* actually take into account the extra reference to
* this node which we are making here. I can
* see the freenode interface but do not see
* allocnode node interface. It maybe node_type.
*
* FIXED: T.Straumann: it is evaluate_path()
* but note the race condition. Threads who
* share their rtems_filesystem_current better
* be synchronized!
*/
saved = rtems_filesystem_current;
rtems_filesystem_current = iop->pathinfo;
/* clone the current node */
if (rtems_filesystem_evaluate_path(".", 1, 0, &loc, 0)) {
/* cloning failed; restore original and bail out */
rtems_filesystem_current = saved;
return -1;
}
/* release the old one */
rtems_filesystem_freenode( &saved );
rtems_filesystem_current = loc;
return 0;
}
int utime(
const char *path,
const struct utimbuf *times
)
{
rtems_filesystem_location_info_t temp_loc;
int result;
if ( rtems_filesystem_evaluate_path( path, 0x00, &temp_loc, TRUE ) )
return -1;
if ( !temp_loc.ops->utime_h ){
rtems_filesystem_freenode( &temp_loc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*temp_loc.ops->utime_h)( &temp_loc, times->actime, times->modtime );
rtems_filesystem_freenode( &temp_loc );
return result;
}
int open(
const char *pathname,
int flags,
...
)
{
va_list ap;
int mode;
int rc;
rtems_libio_t *iop = 0;
int status;
rtems_filesystem_location_info_t loc;
rtems_filesystem_location_info_t *loc_to_free = NULL;
int eval_flags;
/*
* Set the Evaluation flags
*/
eval_flags = 0;
status = flags + 1;
if ( ( status & _FREAD ) == _FREAD )
eval_flags |= RTEMS_LIBIO_PERMS_READ;
if ( ( status & _FWRITE ) == _FWRITE )
eval_flags |= RTEMS_LIBIO_PERMS_WRITE;
va_start(ap, flags);
mode = va_arg( ap, int );
/*
* NOTE: This comment is OBSOLETE. The proper way to do this now
* would be to support a magic mounted file system.
*
* Additional external I/O handlers would be supported by adding
* code to pick apart the pathname appropriately. The networking
* code does not require changes here since network file
* descriptors are obtained using socket(), not open().
*/
/* allocate a file control block */
iop = rtems_libio_allocate();
if ( iop == 0 ) {
rc = ENFILE;
goto done;
}
/*
* See if the file exists.
*/
status = rtems_filesystem_evaluate_path(
pathname, eval_flags, &loc, TRUE );
if ( status == -1 ) {
if ( errno != ENOENT ) {
rc = errno;
goto done;
}
/* If the file does not exist and we are not trying to create it--> error */
if ( !(flags & O_CREAT) ) {
rc = ENOENT;
goto done;
}
/* Create the node for the new regular file */
rc = mknod( pathname, S_IFREG | mode, 0LL );
if ( rc ) {
rc = errno;
goto done;
}
/* Sanity check to see if the file name exists after the mknod() */
status = rtems_filesystem_evaluate_path( pathname, 0x0, &loc, TRUE );
if ( status != 0 ) { /* The file did not exist */
rc = EACCES;
goto done;
}
} else if ((flags & (O_EXCL|O_CREAT)) == (O_EXCL|O_CREAT)) {
/* We were trying to create a file that already exists */
rc = EEXIST;
loc_to_free = &loc;
goto done;
}
loc_to_free = &loc;
/*
* Fill in the file control block based on the loc structure
* returned by successful path evaluation.
*/
iop->handlers = loc.handlers;
iop->file_info = loc.node_access;
iop->flags |= rtems_libio_fcntl_flags( flags );
iop->pathinfo = loc;
if ( !iop->handlers->open_h ) {
rc = ENOTSUP;
goto done;
}
rc = (*iop->handlers->open_h)( iop, pathname, flags, mode );
if ( rc )
goto done;
/*
* Optionally truncate the file.
*/
if ( (flags & O_TRUNC) == O_TRUNC ) {
rc = ftruncate( iop - rtems_libio_iops, 0 );
if ( rc ) {
if(errno) rc = errno;
close( iop - rtems_libio_iops );
/* those are released by close(): */
iop = 0;
loc_to_free = NULL;
}
}
/*
* Single exit and clean up path.
*/
done:
va_end(ap);
if ( rc ) {
if ( iop )
rtems_libio_free( iop );
if ( loc_to_free )
rtems_filesystem_freenode( loc_to_free );
rtems_set_errno_and_return_minus_one( rc );
}
return iop - rtems_libio_iops;
}
int rmdir(
const char *pathname
)
{
int parentpathlen;
const char *name;
rtems_filesystem_location_info_t parentloc;
rtems_filesystem_location_info_t loc;
int i;
int result;
bool free_parentloc = false;
/*
* Get the parent node of the node we wish to remove. Find the parent path.
*/
parentpathlen = rtems_filesystem_dirname ( pathname );
if ( parentpathlen == 0 )
rtems_filesystem_get_start_loc( pathname, &i, &parentloc );
else {
result = rtems_filesystem_evaluate_path(pathname, parentpathlen,
RTEMS_LIBIO_PERMS_WRITE,
&parentloc,
false );
if ( result != 0 )
return -1;
free_parentloc = true;
}
/*
* Start from the parent to find the node that should be under it.
*/
loc = parentloc;
name = pathname + parentpathlen;
name += rtems_filesystem_prefix_separators( name, strlen( name ) );
result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
0, &loc, false );
if ( result != 0 ) {
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return -1;
}
/*
* Verify you can remove this node as a directory.
*/
if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTDIR );
}
/*
* Use the filesystems rmnod to remove the node.
*/
result = (*loc.handlers->rmnod_h)( &parentloc, &loc );
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return result;
}
rtems_status_code rtems_libio_set_private_env(void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_id task_id = rtems_task_self();
rtems_filesystem_location_info_t root_loc;
rtems_filesystem_location_info_t current_loc;
rtems_user_env_t *new_env = NULL;
int rv = 0;
rv = rtems_filesystem_evaluate_path("/", 1, 0, &root_loc, 0);
if (rv != 0)
goto error_0;
rv = rtems_filesystem_evaluate_path("/", 1, 0, ¤t_loc, 0);
if (rv != 0)
goto error_1;
/*
* Malloc is necessary whenever the current task does not
* have its own environment in place. This could be:
* a) it never had one
* OR
* b) it shared another task's environment
*/
/*
* Bharath: I'm not sure if the check can be reduced to
* if( rtems_current_user_env->task_id != task_id ) {
*/
if (
rtems_current_user_env == &rtems_global_user_env
|| rtems_current_user_env->task_id != task_id
) {
new_env = malloc(sizeof(rtems_user_env_t));
if (new_env == NULL)
goto error_2;
#ifdef HAVE_USERENV_REFCNT
new_env->refcnt = 1;
#endif
sc = rtems_task_variable_add(
RTEMS_SELF,
(void*)&rtems_current_user_env,
(void(*)(void *))free_user_env
);
if (sc != RTEMS_SUCCESSFUL)
goto error_3;
rtems_current_user_env = new_env;
}
/* Inherit the global values */
*rtems_current_user_env = rtems_global_user_env;
rtems_current_user_env->task_id = task_id;
/*
* Clone the pathlocs. In contrast to most other code we must _not_ free the
* original locs because what we are trying to do here is forking off clones.
* The reason is a pathloc can be allocated by the file system and needs to
* be freed when deleting the environment.
*/
rtems_filesystem_root = root_loc;
rtems_filesystem_current = current_loc;
return RTEMS_SUCCESSFUL;
error_3:
free(new_env);
error_2:
rtems_filesystem_freenode(¤t_loc);
error_1:
rtems_filesystem_freenode(&root_loc);
error_0:
return RTEMS_NO_MEMORY;
}
int unlink(
const char *path
)
{
int parentpathlen;
const char *name;
rtems_filesystem_location_info_t parentloc;
rtems_filesystem_location_info_t loc;
int i;
int result;
bool free_parentloc = false;
/*
* Get the node to be unlinked. Find the parent path first.
*/
parentpathlen = rtems_filesystem_dirname ( path );
if ( parentpathlen == 0 )
rtems_filesystem_get_start_loc( path, &i, &parentloc );
else {
result = rtems_filesystem_evaluate_path( path, parentpathlen,
RTEMS_LIBIO_PERMS_WRITE,
&parentloc,
false );
if ( result != 0 )
return -1;
free_parentloc = true;
}
/*
* Start from the parent to find the node that should be under it.
*/
loc = parentloc;
name = path + parentpathlen;
name += rtems_filesystem_prefix_separators( name, strlen( name ) );
result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
0, &loc, false );
if ( result != 0 ) {
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return -1;
}
if ( !loc.ops->node_type_h ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
if ( (*loc.ops->node_type_h)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( EISDIR );
}
if ( !loc.ops->unlink_h ) {
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.ops->unlink_h)( &parentloc, &loc );
rtems_filesystem_freenode( &loc );
if ( free_parentloc )
rtems_filesystem_freenode( &parentloc );
return result;
}
int mount(
const char *source,
const char *target,
const char *filesystemtype,
rtems_filesystem_options_t options,
const void *data
)
{
rtems_filesystem_fsmount_me_t mount_h = NULL;
rtems_filesystem_location_info_t loc;
rtems_filesystem_mount_table_entry_t *mt_entry = NULL;
rtems_filesystem_location_info_t *loc_to_free = NULL;
bool has_target = target != NULL;
size_t target_length = 0;
/*
* Are the file system options valid?
*/
if ( options != RTEMS_FILESYSTEM_READ_ONLY &&
options != RTEMS_FILESYSTEM_READ_WRITE )
rtems_set_errno_and_return_minus_one( EINVAL );
/*
* Get mount handler
*/
mount_h = rtems_filesystem_get_mount_handler( filesystemtype );
if ( !mount_h )
rtems_set_errno_and_return_minus_one( EINVAL );
/*
* Allocate a mount table entry
*/
mt_entry = alloc_mount_table_entry(
source,
target,
filesystemtype,
&target_length
);
if ( !mt_entry )
rtems_set_errno_and_return_minus_one( ENOMEM );
mt_entry->mt_fs_root.mt_entry = mt_entry;
mt_entry->options = options;
mt_entry->pathconf_limits_and_options = rtems_filesystem_default_pathconf;
/*
* The mount_point should be a directory with read/write/execute
* permissions in the existing tree.
*/
if ( has_target ) {
if ( rtems_filesystem_evaluate_path(
target, target_length, RTEMS_LIBIO_PERMS_RWX, &loc, true ) == -1 )
goto cleanup_and_bail;
loc_to_free = &loc;
/*
* Test for node_type_h
*/
if (!loc.ops->node_type_h) {
errno = ENOTSUP;
goto cleanup_and_bail;
}
/*
* Test to see if it is a directory
*/
if ( loc.ops->node_type_h( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) {
errno = ENOTDIR;
goto cleanup_and_bail;
}
/*
* You can only mount one file system onto a single mount point.
*/
if ( rtems_filesystem_mount_iterate( is_node_fs_root, loc.node_access ) ) {
errno = EBUSY;
goto cleanup_and_bail;
}
/*
* This must be a good mount point, so move the location information
* into the allocated mount entry. Note: the information that
* may have been allocated in loc should not be sent to freenode
* until the system is unmounted. It may be needed to correctly
* traverse the tree.
*/
mt_entry->mt_point_node.node_access = loc.node_access;
mt_entry->mt_point_node.handlers = loc.handlers;
mt_entry->mt_point_node.ops = loc.ops;
mt_entry->mt_point_node.mt_entry = loc.mt_entry;
/*
* This link to the parent is only done when we are dealing with system
* below the base file system
*/
if ( !loc.ops->mount_h ){
errno = ENOTSUP;
goto cleanup_and_bail;
}
if ( loc.ops->mount_h( mt_entry ) ) {
goto cleanup_and_bail;
}
} else {
/*
* Do we already have a base file system ?
*/
if ( !rtems_chain_is_empty( &mount_chain ) ) {
errno = EINVAL;
goto cleanup_and_bail;
}
/*
* This is a mount of the base file system --> The
* mt_point_node.node_access will be left to null to indicate that this
* is the root of the entire file system.
*/
}
if ( (*mount_h)( mt_entry, data ) ) {
/*
* Try to undo the mount operation
*/
if ( loc.ops->unmount_h ) {
loc.ops->unmount_h( mt_entry );
}
goto cleanup_and_bail;
}
/*
* Add the mount table entry to the mount table chain
*/
rtems_libio_lock();
rtems_chain_append( &mount_chain, &mt_entry->Node );
rtems_libio_unlock();
if ( !has_target )
rtems_filesystem_root = mt_entry->mt_fs_root;
return 0;
cleanup_and_bail:
free( mt_entry );
if ( loc_to_free )
rtems_filesystem_freenode( loc_to_free );
return -1;
}
/*
* rtems_tarfs_load
*
* Here we create the mountpoint directory and load the tarfs at
* that node. Once the IMFS has been mounted, we work through the
* tar image and perform as follows:
* - For directories, simply call mkdir(). The IMFS creates nodes as
* needed.
* - For files, we make our own calls to IMFS eval_for_make and
* create_node.
*/
int rtems_tarfs_load(
char *mountpoint,
uint8_t *tar_image,
size_t tar_size
)
{
rtems_filesystem_location_info_t root_loc;
rtems_filesystem_location_info_t loc;
const char *hdr_ptr;
char filename[100];
char full_filename[256];
int hdr_chksum;
unsigned char linkflag;
unsigned long file_size;
unsigned long file_mode;
int offset;
unsigned long nblocks;
IMFS_jnode_t *node;
int status;
status = rtems_filesystem_evaluate_path(
mountpoint,
strlen(mountpoint),
0,
&root_loc,
0
);
if (status != 0)
return -1;
if (root_loc.ops != &IMFS_ops && root_loc.ops != &fifoIMFS_ops)
return -1;
/*
* Create an IMFS node structure pointing to tar image memory.
*/
offset = 0;
while (1) {
if (offset + 512 > tar_size)
break;
/*
* Read a header.
*/
hdr_ptr = (char *) &tar_image[offset];
offset += 512;
if (strncmp(&hdr_ptr[257], "ustar", 5))
break;
strncpy(filename, hdr_ptr, MAX_NAME_FIELD_SIZE);
filename[MAX_NAME_FIELD_SIZE] = '\0';
linkflag = hdr_ptr[156];
file_mode = _rtems_octal2ulong(&hdr_ptr[100], 8);
file_size = _rtems_octal2ulong(&hdr_ptr[124], 12);
hdr_chksum = _rtems_octal2ulong(&hdr_ptr[148], 8);
if (_rtems_tar_header_checksum(hdr_ptr) != hdr_chksum)
break;
/*
* Generate an IMFS node depending on the file type.
* - For directories, just create directories as usual. IMFS
* will take care of the rest.
* - For files, create a file node with special tarfs properties.
*/
if (linkflag == DIRTYPE) {
strcpy(full_filename, mountpoint);
if (full_filename[strlen(full_filename)-1] != '/')
strcat(full_filename, "/");
strcat(full_filename, filename);
mkdir(full_filename, S_IRWXU | S_IRWXG | S_IRWXO);
}
/*
* Create a LINEAR_FILE node
*
* NOTE: Coverity Id 20 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.
*/
else if (linkflag == REGTYPE) {
const char *name;
loc = root_loc;
if (IMFS_evaluate_for_make(filename, &loc, &name) == 0) {
node = IMFS_create_node(
&loc,
IMFS_LINEAR_FILE, (char *)name,
(file_mode & (S_IRWXU | S_IRWXG | S_IRWXO)) | S_IFREG,
NULL
);
node->info.linearfile.size = file_size;
node->info.linearfile.direct = &tar_image[offset];
}
nblocks = (((file_size) + 511) & ~511) / 512;
offset += 512 * nblocks;
}
}
return status;
}
int unmount(
const char *path
)
{
rtems_filesystem_location_info_t loc;
rtems_filesystem_location_info_t *fs_root_loc;
rtems_filesystem_location_info_t *fs_mount_loc;
rtems_filesystem_mount_table_entry_t *mt_entry;
/*
* Get
* The root node of the mounted filesytem.
* The node for the directory that the fileystem is mounted on.
* The mount entry that is being refered to.
*/
if ( rtems_filesystem_evaluate_path( path, strlen( path ), 0x0, &loc, true ) )
return -1;
mt_entry = loc.mt_entry;
fs_mount_loc = &mt_entry->mt_point_node;
fs_root_loc = &mt_entry->mt_fs_root;
/*
* Verify this is the root node for the file system to be unmounted.
*/
if ( fs_root_loc->node_access != loc.node_access ) {
rtems_filesystem_freenode( &loc );
rtems_set_errno_and_return_minus_one( EACCES );
}
/*
* Free the loc node and just use the nodes from the mt_entry .
*/
rtems_filesystem_freenode( &loc );
/*
* Verify Unmount is supported by both filesystems.
*/
if ( !fs_mount_loc->ops->unmount_h )
rtems_set_errno_and_return_minus_one( ENOTSUP );
if ( !fs_root_loc->ops->fsunmount_me_h )
rtems_set_errno_and_return_minus_one( ENOTSUP );
/*
* Verify the current node is not in this filesystem.
* XXX - Joel I have a question here wasn't code added
* that made the current node thread based instead
* of system based? I thought it was but it doesn't
* look like it in this version.
*/
if ( rtems_filesystem_current.mt_entry == mt_entry )
rtems_set_errno_and_return_minus_one( EBUSY );
/*
* Verify there are no file systems below the path specified
*/
if ( rtems_filesystem_mount_iterate( is_fs_below_mount_point,
fs_root_loc->mt_entry ) )
rtems_set_errno_and_return_minus_one( EBUSY );
/*
* Run the file descriptor table to determine if there are any file
* descriptors that are currently active and reference nodes in the
* file system that we are trying to unmount
*/
if ( rtems_libio_is_open_files_in_fs( mt_entry ) == 1 )
rtems_set_errno_and_return_minus_one( EBUSY );
/*
* Allow the file system being unmounted on to do its cleanup.
* If it fails it will set the errno to the approprate value
* and the fileystem will not be modified.
*/
if (( fs_mount_loc->ops->unmount_h )( mt_entry ) != 0 )
return -1;
/*
* Allow the mounted filesystem to unmark the use of the root node.
*
* Run the unmount function for the subordinate file system.
*
* If we fail to unmount the filesystem remount it on the base filesystems
* directory node.
*
* NOTE: Fatal error is called in a case which should never happen
* This was response was questionable but the best we could
* come up with.
*/
if ((fs_root_loc->ops->fsunmount_me_h )( mt_entry ) != 0) {
if (( fs_mount_loc->ops->mount_h )( mt_entry ) != 0 )
rtems_fatal_error_occurred( 0 );
return -1;
}
/*
* Extract the mount table entry from the chain
*/
rtems_libio_lock();
rtems_chain_extract( &mt_entry->Node );
rtems_libio_unlock();
/*
* Free the memory node that was allocated in mount
* Free the memory associated with the extracted mount table entry.
*/
rtems_filesystem_freenode( fs_mount_loc );
free( mt_entry );
return 0;
}
