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@@ -1183,3 +1183,139 @@ int file_fat_write(const char *filename, void *buffer, loff_t offset,
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{
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return file_fat_write_at(filename, offset, buffer, maxsize, actwrite);
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}
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+
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+int fat_mkdir(const char *new_dirname)
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+{
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+ dir_entry *retdent;
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+ fsdata datablock = { .fatbuf = NULL, };
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+ fsdata *mydata = &datablock;
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+ fat_itr *itr = NULL;
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+ char *dirname_copy, *parent, *dirname;
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+ char l_dirname[VFAT_MAXLEN_BYTES];
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+ int ret = -1;
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+ loff_t actwrite;
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+ unsigned int bytesperclust;
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+ dir_entry *dotdent = NULL;
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+
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+ dirname_copy = strdup(new_dirname);
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+ if (!dirname_copy)
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+ goto exit;
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+
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+ split_filename(dirname_copy, &parent, &dirname);
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+ if (!strlen(dirname)) {
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+ ret = -EINVAL;
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+ goto exit;
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+ }
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+
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+ if (normalize_longname(l_dirname, dirname)) {
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+ printf("FAT: illegal filename (%s)\n", dirname);
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+ ret = -EINVAL;
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+ goto exit;
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+ }
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+
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+ itr = malloc_cache_aligned(sizeof(fat_itr));
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+ if (!itr) {
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+ ret = -ENOMEM;
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+ goto exit;
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+ }
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+
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+ ret = fat_itr_root(itr, &datablock);
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+ if (ret)
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+ goto exit;
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+
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+ total_sector = datablock.total_sect;
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+
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+ ret = fat_itr_resolve(itr, parent, TYPE_DIR);
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+ if (ret) {
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+ printf("%s: doesn't exist (%d)\n", parent, ret);
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+ goto exit;
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+ }
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+
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+ retdent = find_directory_entry(itr, l_dirname);
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+
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+ if (retdent) {
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+ printf("%s: already exists\n", l_dirname);
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+ ret = -EEXIST;
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+ goto exit;
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+ } else {
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+ if (itr->is_root) {
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+ /* root dir cannot have "." or ".." */
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+ if (!strcmp(l_dirname, ".") ||
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+ !strcmp(l_dirname, "..")) {
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+ ret = -EINVAL;
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+ goto exit;
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+ }
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+ }
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+
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+ if (!itr->dent) {
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+ printf("Error: allocating new dir entry\n");
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+ ret = -EIO;
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+ goto exit;
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+ }
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+
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+ memset(itr->dent, 0, sizeof(*itr->dent));
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+
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+ /* Set short name to set alias checksum field in dir_slot */
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+ set_name(itr->dent, dirname);
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+ fill_dir_slot(itr, dirname);
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+
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+ /* Set attribute as archive for regular file */
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+ fill_dentry(itr->fsdata, itr->dent, dirname, 0, 0,
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+ ATTR_DIR | ATTR_ARCH);
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+
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+ retdent = itr->dent;
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+ }
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+
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+ /* Default entries */
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+ bytesperclust = mydata->clust_size * mydata->sect_size;
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+ dotdent = malloc_cache_aligned(bytesperclust);
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+ if (!dotdent) {
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+ ret = -ENOMEM;
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+ goto exit;
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+ }
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+ memset(dotdent, 0, bytesperclust);
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+
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+ memcpy(dotdent[0].name, ". ", 8);
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+ memcpy(dotdent[0].ext, " ", 3);
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+ dotdent[0].attr = ATTR_DIR | ATTR_ARCH;
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+
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+ memcpy(dotdent[1].name, ".. ", 8);
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+ memcpy(dotdent[1].ext, " ", 3);
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+ dotdent[1].attr = ATTR_DIR | ATTR_ARCH;
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+ set_start_cluster(mydata, &dotdent[1], itr->start_clust);
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+
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+ ret = set_contents(mydata, retdent, 0, (__u8 *)dotdent,
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+ bytesperclust, &actwrite);
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+ if (ret < 0) {
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+ printf("Error: writing contents\n");
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+ goto exit;
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+ }
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+ /* Write twice for "." */
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+ set_start_cluster(mydata, &dotdent[0], START(retdent));
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+ ret = set_contents(mydata, retdent, 0, (__u8 *)dotdent,
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+ bytesperclust, &actwrite);
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+ if (ret < 0) {
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+ printf("Error: writing contents\n");
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+ goto exit;
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+ }
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+
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+ /* Flush fat buffer */
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+ ret = flush_dirty_fat_buffer(mydata);
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+ if (ret) {
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+ printf("Error: flush fat buffer\n");
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+ goto exit;
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+ }
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+
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+ /* Write directory table to device */
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+ ret = set_cluster(mydata, itr->clust, itr->block,
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+ mydata->clust_size * mydata->sect_size);
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+ if (ret)
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+ printf("Error: writing directory entry\n");
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+
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+exit:
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+ free(dirname_copy);
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+ free(mydata->fatbuf);
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+ free(itr);
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+ free(dotdent);
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+ return ret;
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+}
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