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_mtime_ctime_update( parent );
} else {
rv = -1;
}
return rv;
}
int IMFS_symlink(
rtems_filesystem_location_info_t *parent_loc,
const char *link_name,
const char *node_name
)
{
IMFS_types_union info;
IMFS_jnode_t *new_node;
char new_name[ IMFS_NAME_MAX + 1 ];
int i;
/*
* Remove any separators at the end of the string.
*/
IMFS_get_token( node_name, strlen( node_name ), new_name, &i );
/*
* Duplicate link name
*/
info.sym_link.name = strdup(link_name);
if (info.sym_link.name == NULL) {
rtems_set_errno_and_return_minus_one(ENOMEM);
}
/*
* Create a new link node.
*
* NOTE: Coverity CID 22 notes this as a resource 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(
parent_loc,
IMFS_SYM_LINK,
new_name,
( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
&info
);
if (new_node == NULL) {
free(info.sym_link.name);
rtems_set_errno_and_return_minus_one(ENOMEM);
}
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_link(
const rtems_filesystem_location_info_t *parentloc,
const rtems_filesystem_location_info_t *targetloc,
const char *name,
size_t namelen
)
{
IMFS_types_union info;
IMFS_jnode_t *new_node;
IMFS_jnode_t *target;
target = targetloc->node_access;
info.hard_link.link_node = target;
/*
* Verify this node can be linked to.
*/
if ( target->st_nlink >= LINK_MAX )
rtems_set_errno_and_return_minus_one( EMLINK );
/*
* Create a new link node.
*/
new_node = IMFS_create_node(
parentloc,
IMFS_HARD_LINK,
name,
namelen,
( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
&info
);
if ( !new_node )
rtems_set_errno_and_return_minus_one( ENOMEM );
/*
* Increment the link count of the node being pointed to.
*/
target->reference_count++;
target->st_nlink++;
IMFS_update_ctime( target );
return 0;
}
int IMFS_symlink(
const rtems_filesystem_location_info_t *parentloc,
const char *name,
size_t namelen,
const char *target
)
{
IMFS_types_union info;
IMFS_jnode_t *new_node;
/*
* Duplicate link name
*/
info.sym_link.name = strdup(target);
if (info.sym_link.name == NULL) {
rtems_set_errno_and_return_minus_one(ENOMEM);
}
/*
* Create a new link node.
*/
new_node = IMFS_create_node(
parentloc,
IMFS_SYM_LINK,
name,
namelen,
( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
&info
);
if (new_node == NULL) {
free(info.sym_link.name);
rtems_set_errno_and_return_minus_one(ENOMEM);
}
return 0;
}
int IMFS_symlink(
rtems_filesystem_location_info_t *parent_loc,
const char *link_name,
const char *node_name
)
{
IMFS_types_union info;
IMFS_jnode_t *new_node;
char new_name[ IMFS_NAME_MAX + 1 ];
int i;
/*
* Remove any separators at the end of the string.
*/
IMFS_get_token( node_name, new_name, &i );
info.sym_link.name = link_name;
/*
* Create a new link node.
*/
new_node = IMFS_create_node(
parent_loc,
IMFS_SYM_LINK,
new_name,
( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
&info
);
if ( !new_node )
rtems_set_errno_and_return_minus_one( ENOMEM );
return 0;
}
int rtems_tarfs_load(
const char *mountpoint,
uint8_t *tar_image,
size_t tar_size
)
{
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;
int rv = 0;
int eval_flags = RTEMS_FS_FOLLOW_LINK;
rtems_filesystem_eval_path_context_t ctx;
rtems_filesystem_location_info_t rootloc;
rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start( &ctx, mountpoint, eval_flags );
rtems_filesystem_eval_path_extract_currentloc( &ctx, &rootloc );
rtems_filesystem_eval_path_set_flags(
&ctx,
RTEMS_FS_MAKE | RTEMS_FS_EXCLUSIVE
);
if ( !IMFS_is_imfs_instance( &rootloc ) ) {
rv = -1;
}
/*
* Create an IMFS node structure pointing to tar image memory.
*/
offset = 0;
while ( rv == 0 ) {
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 symbolic links, create as usual
* - For files, create a file node with special tarfs properties.
*/
if (linkflag == DIRTYPE) {
int len;
strncpy(full_filename, mountpoint, 255);
if (full_filename[(len=strlen(full_filename))-1] != '/')
strcat(full_filename, "/");
++len;
strncat(full_filename, filename, 256-len-1);
if ( mkdir(full_filename, S_IRWXU | S_IRWXG | S_IRWXO) != 0 ) {
if (errno == EEXIST) {
struct stat stat_buf;
if ( stat(full_filename, &stat_buf) == 0 ) {
if ( S_ISDIR(stat_buf.st_mode) ) {
continue;
} else {
if ( unlink(full_filename) != -1 ) {
if ( mkdir(full_filename, S_IRWXU | S_IRWXG | S_IRWXO) == 0 )
continue;
}
}
}
}
rv = -1;
}
}
/*
* Create a LINEAR_FILE node
*/
else if (linkflag == REGTYPE) {
rtems_filesystem_location_free( currentloc );
rtems_filesystem_location_clone( currentloc, &rootloc );
rtems_filesystem_eval_path_set_path(
&ctx,
filename,
strlen( filename )
);
rtems_filesystem_eval_path_continue( &ctx );
if ( !rtems_filesystem_location_is_null( currentloc ) ) {
IMFS_linearfile_t *linfile = (IMFS_linearfile_t *)
IMFS_create_node(
currentloc,
&IMFS_node_control_linfile,
sizeof( IMFS_file_t ),
rtems_filesystem_eval_path_get_token( &ctx ),
rtems_filesystem_eval_path_get_tokenlen( &ctx ),
(file_mode & (S_IRWXU | S_IRWXG | S_IRWXO)) | S_IFREG,
NULL
);
if ( linfile != NULL ) {
linfile->File.size = file_size;
linfile->direct = &tar_image[offset];
}
}
nblocks = (((file_size) + 511) & ~511) / 512;
offset += 512 * nblocks;
}
/*
* Create a symbolic link
*/
else if (linkflag == SYMTYPE) {
const char *linkto = hdr_ptr + 157;
int len;
strncpy(full_filename, mountpoint, 255);
if (full_filename[(len=strlen(full_filename))-1] != '/')
strcat(full_filename, "/");
++len;
strncat(full_filename, filename, 256-len-1);
rv = symlink(linkto, full_filename);
}
}
rtems_filesystem_location_free( &rootloc );
rtems_filesystem_eval_path_cleanup( &ctx );
return rv;
}
/*
* 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 rtems_tarfs_load(
const char *mountpoint,
uint8_t *tar_image,
size_t tar_size
)
{
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 rv = 0;
int eval_flags = RTEMS_FS_FOLLOW_LINK;
rtems_filesystem_eval_path_context_t ctx;
rtems_filesystem_location_info_t rootloc;
rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start( &ctx, mountpoint, eval_flags );
rtems_filesystem_eval_path_extract_currentloc( &ctx, &rootloc );
rtems_filesystem_eval_path_set_flags(
&ctx,
RTEMS_FS_MAKE | RTEMS_FS_EXCLUSIVE
);
if (
rootloc.mt_entry->ops != &IMFS_ops
&& rootloc.mt_entry->ops != &fifoIMFS_ops
) {
rv = -1;
}
/*
* Create an IMFS node structure pointing to tar image memory.
*/
offset = 0;
while ( rv == 0 ) {
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
*/
else if (linkflag == REGTYPE) {
rtems_filesystem_location_free( currentloc );
rtems_filesystem_location_clone( currentloc, &rootloc );
rtems_filesystem_eval_path_set_path(
&ctx,
filename,
strlen( filename )
);
rtems_filesystem_eval_path_continue( &ctx );
if ( !rtems_filesystem_location_is_null( currentloc ) ) {
node = IMFS_create_node(
currentloc,
IMFS_LINEAR_FILE,
rtems_filesystem_eval_path_get_token( &ctx ),
rtems_filesystem_eval_path_get_tokenlen( &ctx ),
(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;
}
}
rtems_filesystem_location_free( &rootloc );
rtems_filesystem_eval_path_cleanup( &ctx );
return rv;
}
