/* * Helper function which writes out a directory block. */ static int write_dir_block(ext2_filsys fs, blk_t *block_nr, e2_blkcnt_t blockcnt, blk_t ref_block EXT2FS_ATTR((unused)), int ref_offset EXT2FS_ATTR((unused)), void *priv_data) { struct write_dir_struct *wd = (struct write_dir_struct *) priv_data; blk_t blk; char *dir; if (*block_nr == 0) return 0; if (blockcnt >= wd->outdir->num) { e2fsck_read_bitmaps(wd->ctx); blk = *block_nr; ext2fs_unmark_block_bitmap2(wd->ctx->block_found_map, blk); ext2fs_block_alloc_stats(fs, blk, -1); *block_nr = 0; wd->cleared++; return BLOCK_CHANGED; } if (blockcnt < 0) return 0; dir = wd->outdir->buf + (blockcnt * fs->blocksize); wd->err = ext2fs_write_dir_block(fs, *block_nr, dir); if (wd->err) return BLOCK_ABORT; return 0; }
static int expand_dir_proc(ext2_filsys fs, blk_t *blocknr, e2_blkcnt_t blockcnt, blk_t ref_block EXT2FS_ATTR((unused)), int ref_offset EXT2FS_ATTR((unused)), void *priv_data) { struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; blk_t new_blk; static blk_t last_blk = 0; char *block; errcode_t retval; if (*blocknr) { last_blk = *blocknr; return 0; } retval = ext2fs_new_block(fs, last_blk, 0, &new_blk); if (retval) { es->err = retval; return BLOCK_ABORT; } if (blockcnt > 0) { retval = ext2fs_new_dir_block(fs, 0, 0, &block); if (retval) { es->err = retval; return BLOCK_ABORT; } es->done = 1; retval = ext2fs_write_dir_block(fs, new_blk, block); } else { retval = ext2fs_get_mem(fs->blocksize, &block); if (retval) { es->err = retval; return BLOCK_ABORT; } memset(block, 0, fs->blocksize); retval = io_channel_write_blk(fs->io, new_blk, 1, block); } if (retval) { es->err = retval; return BLOCK_ABORT; } ext2fs_free_mem(&block); *blocknr = new_blk; ext2fs_block_alloc_stats(fs, new_blk, +1); es->newblocks++; if (es->done) return (BLOCK_CHANGED | BLOCK_ABORT); else return BLOCK_CHANGED; }
static int swap_block(ext2_filsys fs, blk_t *block_nr, int blockcnt, void *priv_data) { errcode_t retval; struct swap_block_struct *sb = (struct swap_block_struct *) priv_data; if (sb->isdir && (blockcnt >= 0) && *block_nr) { retval = ext2fs_read_dir_block(fs, *block_nr, sb->dir_buf); if (retval) { sb->errcode = retval; return BLOCK_ABORT; } retval = ext2fs_write_dir_block(fs, *block_nr, sb->dir_buf); if (retval) { sb->errcode = retval; return BLOCK_ABORT; } } if (blockcnt >= 0) { if (blockcnt < EXT2_NDIR_BLOCKS) return 0; return BLOCK_CHANGED; } if (blockcnt == BLOCK_COUNT_IND) { if (*block_nr == sb->inode->i_block[EXT2_IND_BLOCK]) return 0; return BLOCK_CHANGED; } if (blockcnt == BLOCK_COUNT_DIND) { if (*block_nr == sb->inode->i_block[EXT2_DIND_BLOCK]) return 0; return BLOCK_CHANGED; } if (blockcnt == BLOCK_COUNT_TIND) { if (*block_nr == sb->inode->i_block[EXT2_TIND_BLOCK]) return 0; return BLOCK_CHANGED; } return BLOCK_CHANGED; }
/* * Helper function which is private to this module. Used by * ext2fs_dir_iterate() and ext2fs_dblist_dir_iterate() */ int ext2fs_process_dir_block(ext2_filsys fs, blk_t *blocknr, e2_blkcnt_t blockcnt, blk_t ref_block, int ref_offset, void *priv_data) { struct dir_context *ctx = (struct dir_context *) priv_data; int offset = 0; int next_real_entry = 0; int ret = 0; int changed = 0; int do_abort = 0; int entry, size; struct ext2_dir_entry *dirent; if (blockcnt < 0) return 0; entry = blockcnt ? DIRENT_OTHER_FILE : DIRENT_DOT_FILE; ctx->errcode = ext2fs_read_dir_block(fs, *blocknr, ctx->buf); if (ctx->errcode) return BLOCK_ABORT; while (offset < fs->blocksize) { dirent = (struct ext2_dir_entry *) (ctx->buf + offset); if (((offset + dirent->rec_len) > fs->blocksize) || (dirent->rec_len < 8) || ((dirent->rec_len % 4) != 0) || (((dirent->name_len & 0xFF)+8) > dirent->rec_len)) { ctx->errcode = EXT2_ET_DIR_CORRUPTED; return BLOCK_ABORT; } if (!dirent->inode && !(ctx->flags & DIRENT_FLAG_INCLUDE_EMPTY)) goto next; ret = (ctx->func)(ctx->dir, (next_real_entry > offset) ? DIRENT_DELETED_FILE : entry, dirent, offset, fs->blocksize, ctx->buf, ctx->priv_data); if (entry < DIRENT_OTHER_FILE) entry++; if (ret & DIRENT_CHANGED) changed++; if (ret & DIRENT_ABORT) { do_abort++; break; } next: if (next_real_entry == offset) next_real_entry += dirent->rec_len; if (ctx->flags & DIRENT_FLAG_INCLUDE_REMOVED) { size = ((dirent->name_len & 0xFF) + 11) & ~3; if (dirent->rec_len != size) { int final_offset = offset + dirent->rec_len; offset += size; while (offset < final_offset && !ext2fs_validate_entry(ctx->buf, offset, final_offset)) offset += 4; continue; } } offset += dirent->rec_len; } if (changed) { ctx->errcode = ext2fs_write_dir_block(fs, *blocknr, ctx->buf); if (ctx->errcode) return BLOCK_ABORT; } if (do_abort) return BLOCK_ABORT; return 0; }
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, const char *name) { errcode_t retval; struct ext2_inode parent_inode, inode; ext2_ino_t ino = inum; ext2_ino_t scratch_ino; blk_t blk; char *block = 0; char *ext2bp_block = 0; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); /* * Allocate an inode, if necessary */ if (!ino) { retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755, 0, &ino); if (retval) goto cleanup; } /* * Allocate a data block for the directory */ retval = ext2fs_new_block(fs, 0, 0, &blk); printf("Using block %lu for the dir\n", blk); if (retval) goto cleanup; printf("Writing the dir info into the buffer\n"); /* * Create a scratch template for the directory */ /* Vijay: Offset the block address by the backpointer information */ retval = ext2fs_new_dir_block(fs, ino, parent, &block); //ext2bp_block = block + EXT2BP_HEADER_SIZE; //retval = ext2fs_new_dir_block(fs, ino, parent, &ext2bp_block); if (retval) goto cleanup; /* * Get the parent's inode, if necessary */ if (parent != ino) { retval = ext2fs_read_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } else memset(&parent_inode, 0, sizeof(parent_inode)); /* * Create the inode structure.... */ memset(&inode, 0, sizeof(struct ext2_inode)); inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask); inode.i_uid = inode.i_gid = 0; ext2fs_iblk_set(fs, &inode, 1); inode.i_block[0] = blk; inode.i_links_count = 2; inode.i_size = fs->blocksize; /* Vijay: Adding backlink to the inode - Modifying position 0 * since this is a new inode - It will not have any other links * pointing to it. First, we need to reset all the backlinks. */ printf("Vijay: Adding the backlink to %s\n", name); int i; for(i=0; i < EXT2_N_LINKS; i++) inode.i_backlinks[i] = 0; inode.i_backlinks[0] = parent; printf("Going to write the dir block\n"); /* * Write out the inode and inode data block */ retval = ext2fs_write_dir_block(fs, blk, block); if (retval) goto cleanup; retval = ext2fs_write_new_inode(fs, ino, &inode); if (retval) goto cleanup; printf("Link the directory into the filesystem hierarchy\n"); /* * Link the directory into the filesystem hierarchy */ if (name) { retval = ext2fs_lookup(fs, parent, name, strlen(name), 0, &scratch_ino); if (!retval) { retval = EXT2_ET_DIR_EXISTS; name = 0; goto cleanup; } if (retval != EXT2_ET_FILE_NOT_FOUND) goto cleanup; retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR); printf("Linking done: %lu\n", retval); if (retval) goto cleanup; } /* * Update parent inode's counts */ if (parent != ino) { parent_inode.i_links_count++; retval = ext2fs_write_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } /* * Update accounting.... */ ext2fs_block_alloc_stats(fs, blk, +1); ext2fs_inode_alloc_stats2(fs, ino, +1, 1); cleanup: if (block) ext2fs_free_mem(&block); return retval; }
static int check_dir_block(ext2_filsys fs, struct ext2_db_entry *db, void *priv_data) { struct dx_dir_info *dx_dir; #ifdef ENABLE_HTREE struct dx_dirblock_info *dx_db = 0; #endif struct ext2_dir_entry *dirent, *prev; ext2_dirhash_t hash; unsigned int offset = 0; const char * old_op; int dir_modified = 0; int dot_state; unsigned int rec_len; blk_t block_nr = db->blk; ext2_ino_t ino = db->ino; ext2_ino_t subdir_parent; __u16 links; struct check_dir_struct *cd; char *buf; e2fsck_t ctx; int problem; struct ext2_dx_root_info *root; struct ext2_dx_countlimit *limit; static dict_t de_dict; struct problem_context pctx; int dups_found = 0; int ret; cd = (struct check_dir_struct *) priv_data; buf = cd->buf; ctx = cd->ctx; if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART) return DIRENT_ABORT; if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max)) return DIRENT_ABORT; if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino))) return 0; cd->pctx.ino = ino; cd->pctx.blk = block_nr; cd->pctx.blkcount = db->blockcnt; cd->pctx.ino2 = 0; cd->pctx.dirent = 0; cd->pctx.num = 0; if (db->blk == 0) { if (allocate_dir_block(ctx, db, buf, &cd->pctx)) return 0; block_nr = db->blk; } if (db->blockcnt) dot_state = 2; else dot_state = 0; if (ctx->dirs_to_hash && ext2fs_u32_list_test(ctx->dirs_to_hash, ino)) dups_found++; #if 0 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr, db->blockcnt, ino); #endif old_op = ehandler_operation(_("reading directory block")); cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf); ehandler_operation(0); if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED) cd->pctx.errcode = 0; if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) { ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } memset(buf, 0, fs->blocksize); } #ifdef ENABLE_HTREE dx_dir = e2fsck_get_dx_dir_info(ctx, ino); if (dx_dir && dx_dir->numblocks) { if (db->blockcnt >= dx_dir->numblocks) { if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK, &pctx)) { clear_htree(ctx, ino); dx_dir->numblocks = 0; dx_db = 0; goto out_htree; } fatal_error(ctx, _("Can not continue.")); } dx_db = &dx_dir->dx_block[db->blockcnt]; dx_db->type = DX_DIRBLOCK_LEAF; dx_db->phys = block_nr; dx_db->min_hash = ~0; dx_db->max_hash = 0; dirent = (struct ext2_dir_entry *) buf; (void) ext2fs_get_rec_len(fs, dirent, &rec_len); limit = (struct ext2_dx_countlimit *) (buf+8); if (db->blockcnt == 0) { root = (struct ext2_dx_root_info *) (buf + 24); dx_db->type = DX_DIRBLOCK_ROOT; dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST; if ((root->reserved_zero || root->info_length < 8 || root->indirect_levels > 1) && fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) { clear_htree(ctx, ino); dx_dir->numblocks = 0; dx_db = 0; } dx_dir->hashversion = root->hash_version; if ((dx_dir->hashversion <= EXT2_HASH_TEA) && (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH)) dx_dir->hashversion += 3; dx_dir->depth = root->indirect_levels + 1; } else if ((dirent->inode == 0) && (rec_len == fs->blocksize) && (dirent->name_len == 0) && (ext2fs_le16_to_cpu(limit->limit) == ((fs->blocksize-8) / sizeof(struct ext2_dx_entry)))) dx_db->type = DX_DIRBLOCK_NODE; } out_htree: #endif dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp); prev = 0; do { int group; ext2_ino_t first_unused_inode; problem = 0; dirent = (struct ext2_dir_entry *) (buf + offset); (void) ext2fs_get_rec_len(fs, dirent, &rec_len); cd->pctx.dirent = dirent; cd->pctx.num = offset; if (((offset + rec_len) > fs->blocksize) || (rec_len < 12) || ((rec_len % 4) != 0) || (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) { if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) { salvage_directory(fs, dirent, prev, &offset); dir_modified++; continue; } else goto abort_free_dict; } if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) { if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) { dirent->name_len = EXT2_NAME_LEN; dir_modified++; } } if (dot_state == 0) { if (check_dot(ctx, dirent, ino, &cd->pctx)) dir_modified++; } else if (dot_state == 1) { ret = check_dotdot(ctx, dirent, ino, &cd->pctx); if (ret < 0) goto abort_free_dict; if (ret) dir_modified++; } else if (dirent->inode == ino) { problem = PR_2_LINK_DOT; if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } } if (!dirent->inode) goto next; if (((dirent->inode != EXT2_ROOT_INO) && (dirent->inode < EXT2_FIRST_INODE(fs->super))) || (dirent->inode > fs->super->s_inodes_count)) { problem = PR_2_BAD_INO; } else if (ctx->inode_bb_map && (ext2fs_test_inode_bitmap(ctx->inode_bb_map, dirent->inode))) { problem = PR_2_BB_INODE; } else if ((dot_state > 1) && ((dirent->name_len & 0xFF) == 1) && (dirent->name[0] == '.')) { problem = PR_2_DUP_DOT; } else if ((dot_state > 1) && ((dirent->name_len & 0xFF) == 2) && (dirent->name[0] == '.') && (dirent->name[1] == '.')) { problem = PR_2_DUP_DOT_DOT; } else if ((dot_state > 1) && (dirent->inode == EXT2_ROOT_INO)) { problem = PR_2_LINK_ROOT; } else if ((dot_state > 1) && (dirent->name_len & 0xFF) == 0) { problem = PR_2_NULL_NAME; } if (problem) { if (fix_problem(ctx, problem, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } if (ctx->inode_bad_map && ext2fs_test_inode_bitmap(ctx->inode_bad_map, dirent->inode)) { if (e2fsck_process_bad_inode(ctx, ino, dirent->inode, buf + fs->blocksize)) { dirent->inode = 0; dir_modified++; goto next; } if (ctx->flags & E2F_FLAG_SIGNAL_MASK) return DIRENT_ABORT; } group = ext2fs_group_of_ino(fs, dirent->inode); first_unused_inode = group * fs->super->s_inodes_per_group + 1 + fs->super->s_inodes_per_group - fs->group_desc[group].bg_itable_unused; cd->pctx.group = group; if (fs->group_desc[group].bg_flags & EXT2_BG_INODE_UNINIT) { pctx.num = dirent->inode; if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT, &cd->pctx)){ fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT; ext2fs_mark_super_dirty(fs); ctx->flags |= E2F_FLAG_RESTART_LATER; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } else if (dirent->inode >= first_unused_inode) { pctx.num = dirent->inode; if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){ fs->group_desc[group].bg_itable_unused = 0; ext2fs_mark_super_dirty(fs); ctx->flags |= E2F_FLAG_RESTART_LATER; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } if (!(ctx->flags & E2F_FLAG_RESTART_LATER) && !(ext2fs_test_inode_bitmap(ctx->inode_used_map, dirent->inode))) problem = PR_2_UNUSED_INODE; if (problem) { if (fix_problem(ctx, problem, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } if (check_name(ctx, dirent, ino, &cd->pctx)) dir_modified++; if (check_filetype(ctx, dirent, ino, &cd->pctx)) dir_modified++; #ifdef ENABLE_HTREE if (dx_db) { ext2fs_dirhash(dx_dir->hashversion, dirent->name, (dirent->name_len & 0xFF), fs->super->s_hash_seed, &hash, 0); if (hash < dx_db->min_hash) dx_db->min_hash = hash; if (hash > dx_db->max_hash) dx_db->max_hash = hash; } #endif if ((dot_state > 1) && (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode))) { if (e2fsck_dir_info_get_parent(ctx, dirent->inode, &subdir_parent)) { cd->pctx.ino = dirent->inode; fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx); goto abort_free_dict; } if (subdir_parent) { cd->pctx.ino2 = subdir_parent; if (fix_problem(ctx, PR_2_LINK_DIR, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } cd->pctx.ino2 = 0; } else { (void) e2fsck_dir_info_set_parent(ctx, dirent->inode, ino); } } if (dups_found) { ; } else if (dict_lookup(&de_dict, dirent)) { clear_problem_context(&pctx); pctx.ino = ino; pctx.dirent = dirent; fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx); if (!ctx->dirs_to_hash) ext2fs_u32_list_create(&ctx->dirs_to_hash, 50); if (ctx->dirs_to_hash) ext2fs_u32_list_add(ctx->dirs_to_hash, ino); dups_found++; } else dict_alloc_insert(&de_dict, dirent, dirent); ext2fs_icount_increment(ctx->inode_count, dirent->inode, &links); if (links > 1) ctx->fs_links_count++; ctx->fs_total_count++; next: prev = dirent; if (dir_modified) (void) ext2fs_get_rec_len(fs, dirent, &rec_len); offset += rec_len; dot_state++; } while (offset < fs->blocksize); #if 0 printf("\n"); #endif #ifdef ENABLE_HTREE if (dx_db) { #ifdef DX_DEBUG printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n", db->blockcnt, dx_db->type, dx_db->min_hash, dx_db->max_hash); #endif cd->pctx.dir = cd->pctx.ino; if ((dx_db->type == DX_DIRBLOCK_ROOT) || (dx_db->type == DX_DIRBLOCK_NODE)) parse_int_node(fs, db, cd, dx_dir, buf); } #endif if (offset != fs->blocksize) { cd->pctx.num = rec_len - fs->blocksize + offset; if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) { dirent->rec_len = cd->pctx.num; dir_modified++; } } if (dir_modified) { cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf); if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx)) goto abort_free_dict; } ext2fs_mark_changed(fs); } dict_free_nodes(&de_dict); return 0; abort_free_dict: ctx->flags |= E2F_FLAG_ABORT; dict_free_nodes(&de_dict); return DIRENT_ABORT; }
static int expand_dir_proc(ext2_filsys fs, blk64_t *blocknr, e2_blkcnt_t blockcnt, blk64_t ref_block EXT2FS_ATTR((unused)), int ref_offset EXT2FS_ATTR((unused)), void *priv_data) { struct expand_dir_struct *es = (struct expand_dir_struct *) priv_data; blk64_t new_blk; char *block; errcode_t retval; if (*blocknr) { if (blockcnt >= 0) es->goal = *blocknr; return 0; } if (blockcnt && (EXT2FS_B2C(fs, es->goal) == EXT2FS_B2C(fs, es->goal+1))) new_blk = es->goal+1; else { es->goal &= ~EXT2FS_CLUSTER_MASK(fs); retval = ext2fs_new_block2(fs, es->goal, 0, &new_blk); if (retval) { es->err = retval; return BLOCK_ABORT; } es->newblocks++; } if (blockcnt > 0) { retval = ext2fs_new_dir_block(fs, 0, 0, &block); if (retval) { es->err = retval; return BLOCK_ABORT; } es->done = 1; retval = ext2fs_write_dir_block(fs, new_blk, block); } else { retval = ext2fs_get_mem(fs->blocksize, &block); if (retval) { es->err = retval; return BLOCK_ABORT; } memset(block, 0, fs->blocksize); retval = io_channel_write_blk64(fs->io, new_blk, 1, block); } if (blockcnt >= 0) es->goal = new_blk; if (retval) { es->err = retval; return BLOCK_ABORT; } ext2fs_free_mem(&block); *blocknr = new_blk; ext2fs_block_alloc_stats2(fs, new_blk, +1); if (es->done) return (BLOCK_CHANGED | BLOCK_ABORT); else return BLOCK_CHANGED; }
static int check_dir_block(ext2_filsys fs, struct ext2_db_entry2 *db, void *priv_data) { struct dx_dir_info *dx_dir; #ifdef ENABLE_HTREE struct dx_dirblock_info *dx_db = 0; #endif /* ENABLE_HTREE */ struct ext2_dir_entry *dirent, *prev; ext2_dirhash_t hash; unsigned int offset = 0; int dir_modified = 0; int dot_state; unsigned int rec_len; blk64_t block_nr = db->blk; ext2_ino_t ino = db->ino; ext2_ino_t subdir_parent; __u16 links; struct check_dir_struct *cd; char *buf; e2fsck_t ctx; int problem; struct ext2_dx_root_info *root; struct ext2_dx_countlimit *limit; static dict_t de_dict; struct problem_context pctx; int dups_found = 0; int ret; cd = (struct check_dir_struct *) priv_data; buf = cd->buf; ctx = cd->ctx; if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART) return DIRENT_ABORT; if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max)) return DIRENT_ABORT; /* * Make sure the inode is still in use (could have been * deleted in the duplicate/bad blocks pass. */ if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino))) return 0; cd->pctx.ino = ino; cd->pctx.blk = block_nr; cd->pctx.blkcount = db->blockcnt; cd->pctx.ino2 = 0; cd->pctx.dirent = 0; cd->pctx.num = 0; if (db->blk == 0) { if (allocate_dir_block(ctx, db, buf, &cd->pctx)) return 0; block_nr = db->blk; } if (db->blockcnt) dot_state = 2; else dot_state = 0; if (ctx->dirs_to_hash && ext2fs_u32_list_test(ctx->dirs_to_hash, ino)) dups_found++; #if 0 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr, db->blockcnt, ino); #endif ehandler_operation(_("reading directory block")); cd->pctx.errcode = ext2fs_read_dir_block3(fs, block_nr, buf, 0); ehandler_operation(0); if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED) cd->pctx.errcode = 0; /* We'll handle this ourselves */ if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) { ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } memset(buf, 0, fs->blocksize); } #ifdef ENABLE_HTREE dx_dir = e2fsck_get_dx_dir_info(ctx, ino); if (dx_dir && dx_dir->numblocks) { if (db->blockcnt >= dx_dir->numblocks) { if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK, &pctx)) { clear_htree(ctx, ino); dx_dir->numblocks = 0; dx_db = 0; goto out_htree; } fatal_error(ctx, _("Can not continue.")); } dx_db = &dx_dir->dx_block[db->blockcnt]; dx_db->type = DX_DIRBLOCK_LEAF; dx_db->phys = block_nr; dx_db->min_hash = ~0; dx_db->max_hash = 0; dirent = (struct ext2_dir_entry *) buf; (void) ext2fs_get_rec_len(fs, dirent, &rec_len); limit = (struct ext2_dx_countlimit *) (buf+8); if (db->blockcnt == 0) { root = (struct ext2_dx_root_info *) (buf + 24); dx_db->type = DX_DIRBLOCK_ROOT; dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST; if ((root->reserved_zero || root->info_length < 8 || root->indirect_levels > 1) && fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) { clear_htree(ctx, ino); dx_dir->numblocks = 0; dx_db = 0; } dx_dir->hashversion = root->hash_version; if ((dx_dir->hashversion <= EXT2_HASH_TEA) && (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH)) dx_dir->hashversion += 3; dx_dir->depth = root->indirect_levels + 1; } else if ((dirent->inode == 0) && (rec_len == fs->blocksize) && (dirent->name_len == 0) && (ext2fs_le16_to_cpu(limit->limit) == ((fs->blocksize-8) / sizeof(struct ext2_dx_entry)))) dx_db->type = DX_DIRBLOCK_NODE; } out_htree: #endif /* ENABLE_HTREE */ dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp); prev = 0; do { int group; ext2_ino_t first_unused_inode; problem = 0; dirent = (struct ext2_dir_entry *) (buf + offset); (void) ext2fs_get_rec_len(fs, dirent, &rec_len); cd->pctx.dirent = dirent; cd->pctx.num = offset; if (((offset + rec_len) > fs->blocksize) || (rec_len < 12) || ((rec_len % 4) != 0) || (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) { if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) { salvage_directory(fs, dirent, prev, &offset); dir_modified++; continue; } else goto abort_free_dict; } if (dot_state == 0) { if (check_dot(ctx, dirent, ino, &cd->pctx)) dir_modified++; } else if (dot_state == 1) { ret = check_dotdot(ctx, dirent, ino, &cd->pctx); if (ret < 0) goto abort_free_dict; if (ret) dir_modified++; } else if (dirent->inode == ino) { problem = PR_2_LINK_DOT; if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } } if (!dirent->inode) goto next; /* * Make sure the inode listed is a legal one. */ if (((dirent->inode != EXT2_ROOT_INO) && (dirent->inode < EXT2_FIRST_INODE(fs->super))) || (dirent->inode > fs->super->s_inodes_count)) { problem = PR_2_BAD_INO; } else if (ctx->inode_bb_map && (ext2fs_test_inode_bitmap2(ctx->inode_bb_map, dirent->inode))) { /* * If the inode is in a bad block, offer to * clear it. */ problem = PR_2_BB_INODE; } else if ((dot_state > 1) && ((dirent->name_len & 0xFF) == 1) && (dirent->name[0] == '.')) { /* * If there's a '.' entry in anything other * than the first directory entry, it's a * duplicate entry that should be removed. */ problem = PR_2_DUP_DOT; } else if ((dot_state > 1) && ((dirent->name_len & 0xFF) == 2) && (dirent->name[0] == '.') && (dirent->name[1] == '.')) { /* * If there's a '..' entry in anything other * than the second directory entry, it's a * duplicate entry that should be removed. */ problem = PR_2_DUP_DOT_DOT; } else if ((dot_state > 1) && (dirent->inode == EXT2_ROOT_INO)) { /* * Don't allow links to the root directory. * We check this specially to make sure we * catch this error case even if the root * directory hasn't been created yet. */ problem = PR_2_LINK_ROOT; } else if ((dot_state > 1) && (dirent->name_len & 0xFF) == 0) { /* * Don't allow zero-length directory names. */ problem = PR_2_NULL_NAME; } if (problem) { if (fix_problem(ctx, problem, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } /* * If the inode was marked as having bad fields in * pass1, process it and offer to fix/clear it. * (We wait until now so that we can display the * pathname to the user.) */ if (ctx->inode_bad_map && ext2fs_test_inode_bitmap2(ctx->inode_bad_map, dirent->inode)) { if (e2fsck_process_bad_inode(ctx, ino, dirent->inode, buf + fs->blocksize)) { dirent->inode = 0; dir_modified++; goto next; } if (ctx->flags & E2F_FLAG_SIGNAL_MASK) return DIRENT_ABORT; } group = ext2fs_group_of_ino(fs, dirent->inode); first_unused_inode = group * fs->super->s_inodes_per_group + 1 + fs->super->s_inodes_per_group - ext2fs_bg_itable_unused(fs, group); cd->pctx.group = group; /* * Check if the inode was missed out because * _INODE_UNINIT flag was set or bg_itable_unused was * incorrect. If so, clear the _INODE_UNINIT flag and * restart e2fsck. In the future it would be nice if * we could call a function in pass1.c that checks the * newly visible inodes. */ if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) { pctx.num = dirent->inode; if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT, &cd->pctx)){ ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT); ext2fs_mark_super_dirty(fs); ctx->flags |= E2F_FLAG_RESTART_LATER; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } else if (dirent->inode >= first_unused_inode) { pctx.num = dirent->inode; if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){ ext2fs_bg_itable_unused_set(fs, group, 0); ext2fs_mark_super_dirty(fs); ctx->flags |= E2F_FLAG_RESTART_LATER; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } /* * Offer to clear unused inodes; if we are going to be * restarting the scan due to bg_itable_unused being * wrong, then don't clear any inodes to avoid zapping * inodes that were skipped during pass1 due to an * incorrect bg_itable_unused; we'll get any real * problems after we restart. */ if (!(ctx->flags & E2F_FLAG_RESTART_LATER) && !(ext2fs_test_inode_bitmap2(ctx->inode_used_map, dirent->inode))) problem = PR_2_UNUSED_INODE; if (problem) { if (fix_problem(ctx, problem, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } if (check_name(ctx, dirent, ino, &cd->pctx)) dir_modified++; if (check_filetype(ctx, dirent, ino, &cd->pctx)) dir_modified++; #ifdef ENABLE_HTREE if (dx_db) { ext2fs_dirhash(dx_dir->hashversion, dirent->name, (dirent->name_len & 0xFF), fs->super->s_hash_seed, &hash, 0); if (hash < dx_db->min_hash) dx_db->min_hash = hash; if (hash > dx_db->max_hash) dx_db->max_hash = hash; } #endif /* * If this is a directory, then mark its parent in its * dir_info structure. If the parent field is already * filled in, then this directory has more than one * hard link. We assume the first link is correct, * and ask the user if he/she wants to clear this one. */ if ((dot_state > 1) && (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, dirent->inode))) { if (e2fsck_dir_info_get_parent(ctx, dirent->inode, &subdir_parent)) { cd->pctx.ino = dirent->inode; fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx); goto abort_free_dict; } if (subdir_parent) { cd->pctx.ino2 = subdir_parent; if (fix_problem(ctx, PR_2_LINK_DIR, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } cd->pctx.ino2 = 0; } else { (void) e2fsck_dir_info_set_parent(ctx, dirent->inode, ino); } } if (dups_found) { ; } else if (dict_lookup(&de_dict, dirent)) { clear_problem_context(&pctx); pctx.ino = ino; pctx.dirent = dirent; fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx); if (!ctx->dirs_to_hash) ext2fs_u32_list_create(&ctx->dirs_to_hash, 50); if (ctx->dirs_to_hash) ext2fs_u32_list_add(ctx->dirs_to_hash, ino); dups_found++; } else dict_alloc_insert(&de_dict, dirent, dirent); ext2fs_icount_increment(ctx->inode_count, dirent->inode, &links); if (links > 1) ctx->fs_links_count++; ctx->fs_total_count++; next: prev = dirent; if (dir_modified) (void) ext2fs_get_rec_len(fs, dirent, &rec_len); offset += rec_len; dot_state++; } while (offset < fs->blocksize); #if 0 printf("\n"); #endif #ifdef ENABLE_HTREE if (dx_db) { #ifdef DX_DEBUG printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n", db->blockcnt, dx_db->type, dx_db->min_hash, dx_db->max_hash); #endif cd->pctx.dir = cd->pctx.ino; if ((dx_db->type == DX_DIRBLOCK_ROOT) || (dx_db->type == DX_DIRBLOCK_NODE)) parse_int_node(fs, db, cd, dx_dir, buf); } #endif /* ENABLE_HTREE */ if (offset != fs->blocksize) { cd->pctx.num = rec_len - fs->blocksize + offset; if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) { dirent->rec_len = cd->pctx.num; dir_modified++; } } if (dir_modified) { cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf); if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx)) goto abort_free_dict; } ext2fs_mark_changed(fs); } dict_free_nodes(&de_dict); return 0; abort_free_dict: ctx->flags |= E2F_FLAG_ABORT; dict_free_nodes(&de_dict); return DIRENT_ABORT; }
/* * This routine gets the lost_and_found inode, making it a directory * if necessary */ ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix) { ext2_filsys fs = ctx->fs; ext2_ino_t ino; blk64_t blk; errcode_t retval; struct ext2_inode inode; char * block; static const char name[] = "lost+found"; struct problem_context pctx; if (ctx->lost_and_found) return ctx->lost_and_found; clear_problem_context(&pctx); retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, sizeof(name)-1, 0, &ino); if (retval && !fix) return 0; if (!retval) { if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino)) { ctx->lost_and_found = ino; return ino; } /* Lost+found isn't a directory! */ if (!fix) return 0; pctx.ino = ino; if (!fix_problem(ctx, PR_3_LPF_NOTDIR, &pctx)) return 0; /* OK, unlink the old /lost+found file. */ pctx.errcode = ext2fs_unlink(fs, EXT2_ROOT_INO, name, ino, 0); if (pctx.errcode) { pctx.str = "ext2fs_unlink"; fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); return 0; } (void) e2fsck_dir_info_set_parent(ctx, ino, 0); e2fsck_adjust_inode_count(ctx, ino, -1); } else if (retval != EXT2_ET_FILE_NOT_FOUND) { pctx.errcode = retval; fix_problem(ctx, PR_3_ERR_FIND_LPF, &pctx); } if (!fix_problem(ctx, PR_3_NO_LF_DIR, 0)) return 0; /* * Read the inode and block bitmaps in; we'll be messing with * them. */ e2fsck_read_bitmaps(ctx); /* * First, find a free block */ retval = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); if (retval) { pctx.errcode = retval; fix_problem(ctx, PR_3_ERR_LPF_NEW_BLOCK, &pctx); return 0; } ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); ext2fs_block_alloc_stats2(fs, blk, +1); /* * Next find a free inode. */ retval = ext2fs_new_inode(fs, EXT2_ROOT_INO, 040700, ctx->inode_used_map, &ino); if (retval) { pctx.errcode = retval; fix_problem(ctx, PR_3_ERR_LPF_NEW_INODE, &pctx); return 0; } ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino); ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, ino); ext2fs_inode_alloc_stats2(fs, ino, +1, 1); /* * Now let's create the actual data block for the inode */ retval = ext2fs_new_dir_block(fs, ino, EXT2_ROOT_INO, &block); if (retval) { pctx.errcode = retval; fix_problem(ctx, PR_3_ERR_LPF_NEW_DIR_BLOCK, &pctx); return 0; } retval = ext2fs_write_dir_block(fs, blk, block); ext2fs_free_mem(&block); if (retval) { pctx.errcode = retval; fix_problem(ctx, PR_3_ERR_LPF_WRITE_BLOCK, &pctx); return 0; } /* * Set up the inode structure */ memset(&inode, 0, sizeof(inode)); inode.i_mode = 040700; inode.i_size = fs->blocksize; inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; inode.i_links_count = 2; ext2fs_iblk_set(fs, &inode, 1); inode.i_block[0] = blk; /* * Next, write out the inode. */ pctx.errcode = ext2fs_write_new_inode(fs, ino, &inode); if (pctx.errcode) { pctx.str = "ext2fs_write_inode"; fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); return 0; } /* * Finally, create the directory link */ pctx.errcode = ext2fs_link(fs, EXT2_ROOT_INO, name, ino, EXT2_FT_DIR); if (pctx.errcode) { pctx.str = "ext2fs_link"; fix_problem(ctx, PR_3_CREATE_LPF_ERROR, &pctx); return 0; } /* * Miscellaneous bookkeeping that needs to be kept straight. */ e2fsck_add_dir_info(ctx, ino, EXT2_ROOT_INO); e2fsck_adjust_inode_count(ctx, EXT2_ROOT_INO, 1); ext2fs_icount_store(ctx->inode_count, ino, 2); ext2fs_icount_store(ctx->inode_link_info, ino, 2); ctx->lost_and_found = ino; quota_data_add(ctx->qctx, &inode, ino, fs->blocksize); quota_data_inodes(ctx->qctx, &inode, ino, +1); #if 0 printf("/lost+found created; inode #%lu\n", ino); #endif return ino; }
/* * This makes sure the root inode is present; if not, we ask if the * user wants us to create it. Not creating it is a fatal error. */ static void check_root(e2fsck_t ctx) { ext2_filsys fs = ctx->fs; blk64_t blk; struct ext2_inode inode; char * block; struct problem_context pctx; clear_problem_context(&pctx); if (ext2fs_test_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO)) { /* * If the root inode is not a directory, die here. The * user must have answered 'no' in pass1 when we * offered to clear it. */ if (!(ext2fs_test_inode_bitmap2(ctx->inode_dir_map, EXT2_ROOT_INO))) { fix_problem(ctx, PR_3_ROOT_NOT_DIR_ABORT, &pctx); ctx->flags |= E2F_FLAG_ABORT; } return; } if (!fix_problem(ctx, PR_3_NO_ROOT_INODE, &pctx)) { fix_problem(ctx, PR_3_NO_ROOT_INODE_ABORT, &pctx); ctx->flags |= E2F_FLAG_ABORT; return; } e2fsck_read_bitmaps(ctx); /* * First, find a free block */ pctx.errcode = ext2fs_new_block2(fs, 0, ctx->block_found_map, &blk); if (pctx.errcode) { pctx.str = "ext2fs_new_block"; fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); ctx->flags |= E2F_FLAG_ABORT; return; } ext2fs_mark_block_bitmap2(ctx->block_found_map, blk); ext2fs_mark_block_bitmap2(fs->block_map, blk); ext2fs_mark_bb_dirty(fs); /* * Now let's create the actual data block for the inode */ pctx.errcode = ext2fs_new_dir_block(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, &block); if (pctx.errcode) { pctx.str = "ext2fs_new_dir_block"; fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); ctx->flags |= E2F_FLAG_ABORT; return; } pctx.errcode = ext2fs_write_dir_block(fs, blk, block); if (pctx.errcode) { pctx.str = "ext2fs_write_dir_block"; fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); ctx->flags |= E2F_FLAG_ABORT; return; } ext2fs_free_mem(&block); /* * Set up the inode structure */ memset(&inode, 0, sizeof(inode)); inode.i_mode = 040755; inode.i_size = fs->blocksize; inode.i_atime = inode.i_ctime = inode.i_mtime = ctx->now; inode.i_links_count = 2; ext2fs_iblk_set(fs, &inode, 1); inode.i_block[0] = blk; /* * Write out the inode. */ pctx.errcode = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); if (pctx.errcode) { pctx.str = "ext2fs_write_inode"; fix_problem(ctx, PR_3_CREATE_ROOT_ERROR, &pctx); ctx->flags |= E2F_FLAG_ABORT; return; } /* * Miscellaneous bookkeeping... */ e2fsck_add_dir_info(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO); ext2fs_icount_store(ctx->inode_count, EXT2_ROOT_INO, 2); ext2fs_icount_store(ctx->inode_link_info, EXT2_ROOT_INO, 2); ext2fs_mark_inode_bitmap2(ctx->inode_used_map, EXT2_ROOT_INO); ext2fs_mark_inode_bitmap2(ctx->inode_dir_map, EXT2_ROOT_INO); ext2fs_mark_inode_bitmap2(fs->inode_map, EXT2_ROOT_INO); ext2fs_mark_ib_dirty(fs); }
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, const char *name) { errcode_t retval; struct ext2_inode parent_inode, inode; ext2_ino_t ino = inum; ext2_ino_t scratch_ino; blk_t blk; char *block = 0; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); /* * Allocate an inode, if necessary */ if (!ino) { retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755, 0, &ino); if (retval) goto cleanup; } /* * Allocate a data block for the directory */ retval = ext2fs_new_block(fs, 0, 0, &blk); if (retval) goto cleanup; /* * Create a scratch template for the directory */ retval = ext2fs_new_dir_block(fs, ino, parent, &block); if (retval) goto cleanup; /* * Get the parent's inode, if necessary */ if (parent != ino) { retval = ext2fs_read_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } else memset(&parent_inode, 0, sizeof(parent_inode)); /* * Create the inode structure.... */ memset(&inode, 0, sizeof(struct ext2_inode)); inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask); inode.i_uid = inode.i_gid = 0; inode.i_blocks = fs->blocksize / 512; inode.i_block[0] = blk; inode.i_links_count = 2; inode.i_ctime = inode.i_atime = inode.i_mtime = fs->now ? fs->now : time(NULL); inode.i_size = fs->blocksize; /* * Write out the inode and inode data block */ retval = ext2fs_write_dir_block(fs, blk, block); if (retval) goto cleanup; retval = ext2fs_write_new_inode(fs, ino, &inode); if (retval) goto cleanup; /* * Link the directory into the filesystem hierarchy */ if (name) { retval = ext2fs_lookup(fs, parent, name, strlen(name), 0, &scratch_ino); if (!retval) { retval = EXT2_ET_DIR_EXISTS; name = 0; goto cleanup; } if (retval != EXT2_ET_FILE_NOT_FOUND) goto cleanup; retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR); if (retval) goto cleanup; } /* * Update parent inode's counts */ if (parent != ino) { parent_inode.i_links_count++; retval = ext2fs_write_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } /* * Update accounting.... */ ext2fs_block_alloc_stats(fs, blk, +1); ext2fs_inode_alloc_stats2(fs, ino, +1, 1); cleanup: if (block) ext2fs_free_mem(&block); return retval; }
/* * allocate_dir_block --- this function allocates a new directory * block for a particular inode; this is done if a directory has * a "hole" in it, or if a directory has a illegal block number * that was zeroed out and now needs to be replaced. */ static int allocate_dir_block(e2fsck_t ctx, struct ext2_db_entry *db, char *buf, struct problem_context *pctx) { ext2_filsys fs = ctx->fs; blk_t blk; char *block; struct ext2_inode inode; if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0) return 1; /* * Read the inode and block bitmaps in; we'll be messing with * them. */ e2fsck_read_bitmaps(ctx); /* * First, find a free block */ pctx->errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk); if (pctx->errcode) { pctx->str = "ext2fs_new_block"; fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx); return 1; } ext2fs_mark_block_bitmap(ctx->block_found_map, blk); ext2fs_mark_block_bitmap(fs->block_map, blk); ext2fs_mark_bb_dirty(fs); /* * Now let's create the actual data block for the inode */ if (db->blockcnt) pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block); else pctx->errcode = ext2fs_new_dir_block(fs, db->ino, EXT2_ROOT_INO, &block); if (pctx->errcode) { pctx->str = "ext2fs_new_dir_block"; fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx); return 1; } pctx->errcode = ext2fs_write_dir_block(fs, blk, block); ext2fs_free_mem((void **) &block); if (pctx->errcode) { pctx->str = "ext2fs_write_dir_block"; fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx); return 1; } /* * Update the inode block count */ e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block"); inode.i_blocks += fs->blocksize / 512; if (inode.i_size < (db->blockcnt+1) * fs->blocksize) inode.i_size = (db->blockcnt+1) * fs->blocksize; e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block"); /* * Finally, update the block pointers for the inode */ db->blk = blk; pctx->errcode = ext2fs_block_iterate2(fs, db->ino, BLOCK_FLAG_HOLE, 0, update_dir_block, db); if (pctx->errcode) { pctx->str = "ext2fs_block_iterate"; fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx); return 1; } return 0; }
static int check_dir_block(ext2_filsys fs, struct ext2_db_entry *db, void *priv_data) { struct dir_info *subdir, *dir; struct ext2_dir_entry *dirent; int offset = 0; int dir_modified = 0; int dot_state; blk_t block_nr = db->blk; ext2_ino_t ino = db->ino; __u16 links; struct check_dir_struct *cd; char *buf; e2fsck_t ctx; int problem; cd = (struct check_dir_struct *) priv_data; buf = cd->buf; ctx = cd->ctx; if (ctx->progress) if ((ctx->progress)(ctx, 2, cd->count++, cd->max)) return DIRENT_ABORT; /* * Make sure the inode is still in use (could have been * deleted in the duplicate/bad blocks pass. */ if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino))) return 0; cd->pctx.ino = ino; cd->pctx.blk = block_nr; cd->pctx.blkcount = db->blockcnt; cd->pctx.ino2 = 0; cd->pctx.dirent = 0; cd->pctx.num = 0; if (db->blk == 0) { if (allocate_dir_block(ctx, db, buf, &cd->pctx)) return 0; block_nr = db->blk; } if (db->blockcnt) dot_state = 2; else dot_state = 0; #if 0 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr, db->blockcnt, ino); #endif cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf); if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED) cd->pctx.errcode = 0; /* We'll handle this ourselves */ if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) { ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } memset(buf, 0, fs->blocksize); } do { dot_state++; problem = 0; dirent = (struct ext2_dir_entry *) (buf + offset); cd->pctx.dirent = dirent; cd->pctx.num = offset; if (((offset + dirent->rec_len) > fs->blocksize) || (dirent->rec_len < 12) || ((dirent->rec_len % 4) != 0) || (((dirent->name_len & 0xFF)+8) > dirent->rec_len)) { if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) { dirent->rec_len = fs->blocksize - offset; dirent->name_len = 0; dirent->inode = 0; dir_modified++; } else return DIRENT_ABORT; } if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) { if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) { dirent->name_len = EXT2_NAME_LEN; dir_modified++; } } if (dot_state == 1) { if (check_dot(ctx, dirent, ino, &cd->pctx)) dir_modified++; } else if (dot_state == 2) { dir = e2fsck_get_dir_info(ctx, ino); if (!dir) { fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx); ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } if (check_dotdot(ctx, dirent, dir, &cd->pctx)) dir_modified++; } else if (dirent->inode == ino) { problem = PR_2_LINK_DOT; if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } } if (!dirent->inode) goto next; /* * Make sure the inode listed is a legal one. */ if (((dirent->inode != EXT2_ROOT_INO) && (dirent->inode < EXT2_FIRST_INODE(fs->super))) || (dirent->inode > fs->super->s_inodes_count)) { problem = PR_2_BAD_INO; } else if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, dirent->inode))) { /* * If the inode is unused, offer to clear it. */ problem = PR_2_UNUSED_INODE; } else if (ctx->inode_bb_map && (ext2fs_test_inode_bitmap(ctx->inode_bb_map, dirent->inode))) { /* * If the inode is in a bad block, offer to * clear it. */ problem = PR_2_BB_INODE; } else if ((dot_state > 2) && ((dirent->name_len & 0xFF) == 1) && (dirent->name[0] == '.')) { /* * If there's a '.' entry in anything other * than the first directory entry, it's a * duplicate entry that should be removed. */ problem = PR_2_DUP_DOT; } else if ((dot_state > 2) && ((dirent->name_len & 0xFF) == 2) && (dirent->name[0] == '.') && (dirent->name[1] == '.')) { /* * If there's a '..' entry in anything other * than the second directory entry, it's a * duplicate entry that should be removed. */ problem = PR_2_DUP_DOT_DOT; } else if ((dot_state > 2) && (dirent->inode == EXT2_ROOT_INO)) { /* * Don't allow links to the root directory. * We check this specially to make sure we * catch this error case even if the root * directory hasn't been created yet. */ problem = PR_2_LINK_ROOT; } else if ((dot_state > 2) && (dirent->name_len & 0xFF) == 0) { /* * Don't allow zero-length directory names. */ problem = PR_2_NULL_NAME; } if (problem) { if (fix_problem(ctx, problem, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } else { ext2fs_unmark_valid(fs); if (problem == PR_2_BAD_INO) goto next; } } /* * If the inode was marked as having bad fields in * pass1, process it and offer to fix/clear it. * (We wait until now so that we can display the * pathname to the user.) */ if (ctx->inode_bad_map && ext2fs_test_inode_bitmap(ctx->inode_bad_map, dirent->inode)) { if (e2fsck_process_bad_inode(ctx, ino, dirent->inode)) { dirent->inode = 0; dir_modified++; goto next; } if (ctx->flags & E2F_FLAG_SIGNAL_MASK) return DIRENT_ABORT; } if (check_name(ctx, dirent, ino, &cd->pctx)) dir_modified++; if (check_filetype(ctx, dirent, ino, &cd->pctx)) dir_modified++; /* * If this is a directory, then mark its parent in its * dir_info structure. If the parent field is already * filled in, then this directory has more than one * hard link. We assume the first link is correct, * and ask the user if he/she wants to clear this one. */ if ((dot_state > 2) && (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode))) { subdir = e2fsck_get_dir_info(ctx, dirent->inode); if (!subdir) { cd->pctx.ino = dirent->inode; fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx); ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } if (subdir->parent) { cd->pctx.ino2 = subdir->parent; if (fix_problem(ctx, PR_2_LINK_DIR, &cd->pctx)) { dirent->inode = 0; dir_modified++; goto next; } cd->pctx.ino2 = 0; } else subdir->parent = ino; } ext2fs_icount_increment(ctx->inode_count, dirent->inode, &links); if (links > 1) ctx->fs_links_count++; ctx->fs_total_count++; next: offset += dirent->rec_len; } while (offset < fs->blocksize); #if 0 printf("\n"); #endif if (offset != fs->blocksize) { cd->pctx.num = dirent->rec_len - fs->blocksize + offset; if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) { dirent->rec_len = cd->pctx.num; dir_modified++; } } if (dir_modified) { cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf); if (cd->pctx.errcode) { if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx)) { ctx->flags |= E2F_FLAG_ABORT; return DIRENT_ABORT; } } ext2fs_mark_changed(fs); } return 0; }
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, const char *name) { ext2_extent_handle_t handle; errcode_t retval; struct ext2_inode parent_inode, inode; ext2_ino_t ino = inum; ext2_ino_t scratch_ino; blk64_t blk; char *block = 0; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); /* * Allocate an inode, if necessary */ if (!ino) { retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755, 0, &ino); if (retval) goto cleanup; } /* * Allocate a data block for the directory */ retval = ext2fs_new_block2(fs, 0, 0, &blk); if (retval) goto cleanup; /* * Create a scratch template for the directory */ retval = ext2fs_new_dir_block(fs, ino, parent, &block); if (retval) goto cleanup; /* * Get the parent's inode, if necessary */ if (parent != ino) { retval = ext2fs_read_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } else memset(&parent_inode, 0, sizeof(parent_inode)); /* * Create the inode structure.... */ memset(&inode, 0, sizeof(struct ext2_inode)); inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask); inode.i_uid = inode.i_gid = 0; ext2fs_iblk_set(fs, &inode, 1); if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) inode.i_flags |= EXT4_EXTENTS_FL; else inode.i_block[0] = blk; inode.i_links_count = 2; inode.i_size = fs->blocksize; /* * Write out the inode and inode data block */ retval = ext2fs_write_dir_block(fs, blk, block); if (retval) goto cleanup; retval = ext2fs_write_new_inode(fs, ino, &inode); if (retval) goto cleanup; if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) { retval = ext2fs_extent_open2(fs, ino, &inode, &handle); if (retval) goto cleanup; retval = ext2fs_extent_set_bmap(handle, 0, blk, 0); ext2fs_extent_free(handle); if (retval) goto cleanup; } /* * Link the directory into the filesystem hierarchy */ if (name) { retval = ext2fs_lookup(fs, parent, name, strlen(name), 0, &scratch_ino); if (!retval) { retval = EXT2_ET_DIR_EXISTS; name = 0; goto cleanup; } if (retval != EXT2_ET_FILE_NOT_FOUND) goto cleanup; retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR); if (retval) goto cleanup; } /* * Update parent inode's counts */ if (parent != ino) { parent_inode.i_links_count++; retval = ext2fs_write_inode(fs, parent, &parent_inode); if (retval) goto cleanup; } /* * Update accounting.... */ ext2fs_block_alloc_stats2(fs, blk, +1); ext2fs_inode_alloc_stats2(fs, ino, +1, 1); cleanup: if (block) ext2fs_free_mem(&block); return retval; }