file_systems/fat/dir.c

6 #include "dir.h"
39 static status_t	findfile(nspace *vol, vnode *dir, const char *file,
55 //!	Scans dir for the next entry, using the state stored in a struct diri.
205 get_next_dirent(nspace *vol, vnode *dir, struct diri *iter, ino_t *vnid,
216 	} while ((info.mode & FAT_VOLUME) && (dir->vnid == vol->root_vnode.vnid));
220 		if (vnid) *vnid = dir->vnid;
223 		if (vnid) *vnid = dir->dir_vnid;
227 				? GENERATE_DIR_CLUSTER_VNID(dir->vnid, info.cluster)
228 				: GENERATE_DIR_INDEX_VNID(dir->vnid, info.sindex);
271 check_dir_empty(nspace *vol, vnode *dir)
277 	if (diri_init(vol, dir->cluster, 0, &iter) == NULL) {
282 	i = (dir->vnid == vol->root_vnode.vnid) ? 2 : 0;
312 findfile_case(nspace *vol, vnode *dir, const char *file, ino_t *vnid,
315 	return findfile(vol, dir, file, vnid, node, true, false, NULL);
320 findfile_nocase(nspace *vol, vnode *dir, const char *file, ino_t *vnid,
323 	return findfile(vol, dir, file, vnid, node, false, false, NULL);
328 findfile_nocase_duplicates(nspace *vol, vnode *dir, const char *file,
331 	return findfile(vol, dir, file, vnid, node, false, true, dups_exist);
336 findfile_case_duplicates(nspace *vol, vnode *dir, const char *file,
339 	return findfile(vol, dir, file, vnid, node, true, true, dups_exist);
344 findfile(nspace *vol, vnode *dir, const char *file, ino_t *vnid,
361 //	dprintf("findfile: %s in %Lx, case %d dups %d\n", file, dir->vnid, check_case, check_dups);
363 	DPRINTF(1, ("findfile: %s in %Lx\n", file, dir->vnid));
370 	if (strcmp(file,".") == 0 && dir->vnid == vol->root_vnode.vnid) {
372 		found_vnid = dir->vnid;
373 	} else if (strcmp(file, "..") == 0 && dir->vnid == vol->root_vnode.vnid) {
375 		found_vnid = dir->dir_vnid;
380 		if (diri_init(vol, dir->cluster, 0, &diri) == NULL) {
389 			result = get_next_dirent(vol, dir, &diri, &_vnid, filename, 512);
486 compact_directory(nspace *vol, vnode *dir)
492 	DPRINTF(0, ("compacting directory with vnode id %Lx\n", dir->vnid));
495 	if (IS_FIXED_ROOT(dir->cluster))
498 	if (diri_init(vol, dir->cluster, 0, &diri) == NULL) {
499 		dprintf("compact_directory: cannot open dir at cluster (%lx)\n",
500 			dir->cluster);
510 			// don't compact away volume labels in the root dir
511 			if (!(info.mode & FAT_VOLUME) || (dir->vnid != vol->root_vnode.vnid))
524 			if (clusters * vol->bytes_per_sector * vol->sectors_per_cluster < dir->st_size) {
526 				error = set_fat_chain_length(vol, dir, clusters);
527 				dir->st_size = clusters*vol->bytes_per_sector*vol->sectors_per_cluster;
528 				dir->iteration++;
545 find_short_name(nspace *vol, vnode *dir, const uchar *name)
551 	buffer = diri_init(vol, dir->cluster, 0, &diri);
581 _create_dir_entry_(nspace *vol, vnode *dir, struct _entry_info_ *info,
627 	if (diri_init(vol, dir->cluster, 0, &diri) == NULL) {
628 		dprintf("_create_dir_entry_: cannot open dir at cluster (%lx)\n", dir->cluster);
663 			GENERATE_DIR_INDEX_VNID(dir->cluster, i)) == ENOENT);
666 	DPRINTF(0, ("directory entry runs from %lx to %lx (dirsize = %Lx) (is%s last entry)\n", *ns, *ne, dir->st_size, last_entry ? "" : "n't"));
669 	if (*ne * 0x20 >= dir->st_size) {
673 		if (IS_FIXED_ROOT(dir->cluster)) {
684 			dir->st_size/vol->bytes_per_sector/vol->sectors_per_cluster, clusters_needed));
685 		if ((error = set_fat_chain_length(vol, dir, clusters_needed)) < 0)
687 		dir->st_size = vol->bytes_per_sector*vol->sectors_per_cluster*clusters_needed;
688 		dir->iteration++;
692 	buffer = diri_init(vol,dir->cluster, *ns, &diri);
694 		dprintf("_create_dir_entry_: cannot open dir at (%lx, %lu)\n",
695 			dir->cluster, *ns);
815 create_dir_entry(nspace *vol, vnode *dir, vnode *node, const char *name,
829 	error = findfile_nocase(vol, dir, name, NULL, NULL);
831 		DPRINTF(0, ("%s already found in directory %Lx\n", name, dir->vnid));
868 			error = find_short_name(vol, dir, nshort);
875 			} while ((error = find_short_name(vol, dir, nshort)) == B_OK && ++iter < 10);
887 			} while ((error = find_short_name(vol, dir, nshort)) == B_OK);
903 	return _create_dir_entry_(vol, dir, &info, (char *)nshort,
1047 	vnode	*dir = (vnode*)_dir->private_node;
1053 	DPRINTF(0, ("dosfs_walk: find %Lx/%s\n", dir->vnid, file));
1055 	result = findfile_case(vol, dir, file, _vnid, &vnode);
1162 	vnode		*dir = (vnode *)_dir->private_node;
1169 		dir->vnid, cookie->current_index));
1172 	if (dir->vnid == vol->root_vnode.vnid) {
1191 	if (diri_init(vol, dir->cluster, cookie->current_index, &diri) == NULL) {
1200 	result = get_next_dirent(vol, dir, &diri, &entry->d_ino, entry->d_name,
1206 	if (dir->vnid == vol->root_vnode.vnid)