Lines Matching +full:de +full:- +full:be
1 // SPDX-License-Identifier: GPL-2.0
7 * Laboratoire MASI - Institut Blaise Pascal
18 * Big-endian to little-endian byte-swapping/bitmaps by
36 * is_dx_dir() - check if a directory is using htree indexing
39 * Check if the given dir-inode refers to an htree-indexed directory
47 struct super_block *sb = inode->i_sb; in is_dx_dir()
49 if (ext4_has_feature_dir_index(inode->i_sb) && in is_dx_dir()
51 ((inode->i_size >> sb->s_blocksize_bits) == 1) || in is_dx_dir()
58 static bool is_fake_dir_entry(struct ext4_dir_entry_2 *de) in is_fake_dir_entry() argument
61 if ((de->name_len > 0) && (de->name_len <= 2) && (de->name[0] == '.') && in is_fake_dir_entry()
62 (de->name[1] == '.' || de->name[1] == '\0')) in is_fake_dir_entry()
65 if (de->file_type == EXT4_FT_DIR_CSUM) in is_fake_dir_entry()
75 * bh passed here can be an inode block or a dir data block, depending
80 struct ext4_dir_entry_2 *de, in __ext4_check_dir_entry() argument
85 const int rlen = ext4_rec_len_from_disk(de->rec_len, in __ext4_check_dir_entry()
86 dir->i_sb->s_blocksize); in __ext4_check_dir_entry()
87 const int next_offset = ((char *) de - buf) + rlen; in __ext4_check_dir_entry()
88 bool fake = is_fake_dir_entry(de); in __ext4_check_dir_entry()
89 bool has_csum = ext4_has_metadata_csum(dir->i_sb); in __ext4_check_dir_entry()
95 else if (unlikely(rlen < ext4_dir_rec_len(de->name_len, in __ext4_check_dir_entry()
100 else if (unlikely(next_offset > size - ext4_dir_rec_len(1, in __ext4_check_dir_entry()
104 else if (unlikely(le32_to_cpu(de->inode) > in __ext4_check_dir_entry()
105 le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count))) in __ext4_check_dir_entry()
111 ext4_error_file(filp, function, line, bh->b_blocknr, in __ext4_check_dir_entry()
112 "bad entry in directory: %s - offset=%u, " in __ext4_check_dir_entry()
114 error_msg, offset, le32_to_cpu(de->inode), in __ext4_check_dir_entry()
117 ext4_error_inode(dir, function, line, bh->b_blocknr, in __ext4_check_dir_entry()
118 "bad entry in directory: %s - offset=%u, " in __ext4_check_dir_entry()
120 error_msg, offset, le32_to_cpu(de->inode), in __ext4_check_dir_entry()
130 struct ext4_dir_entry_2 *de; in ext4_readdir() local
133 struct super_block *sb = inode->i_sb; in ext4_readdir()
170 while (ctx->pos < inode->i_size) { in ext4_readdir()
174 err = -ERESTARTSYS; in ext4_readdir()
178 offset = ctx->pos & (sb->s_blocksize - 1); in ext4_readdir()
179 map.m_lblk = ctx->pos >> EXT4_BLOCK_SIZE_BITS(sb); in ext4_readdir()
183 /* m_len should never be zero but let's avoid in ext4_readdir()
187 ctx->pos += map.m_len * sb->s_blocksize; in ext4_readdir()
192 (PAGE_SHIFT - inode->i_blkbits); in ext4_readdir()
193 if (!ra_has_index(&file->f_ra, index)) in ext4_readdir()
195 sb->s_bdev->bd_inode->i_mapping, in ext4_readdir()
196 &file->f_ra, file, in ext4_readdir()
198 file->f_ra.prev_pos = (loff_t)index << PAGE_SHIFT; in ext4_readdir()
209 if (ctx->pos > inode->i_blocks << 9) in ext4_readdir()
211 ctx->pos += sb->s_blocksize - offset; in ext4_readdir()
220 (unsigned long long)ctx->pos); in ext4_readdir()
221 ctx->pos += sb->s_blocksize - offset; in ext4_readdir()
229 * readdir(2), then we might be pointing to an invalid in ext4_readdir()
232 if (!inode_eq_iversion(inode, file->f_version)) { in ext4_readdir()
233 for (i = 0; i < sb->s_blocksize && i < offset; ) { in ext4_readdir()
234 de = (struct ext4_dir_entry_2 *) in ext4_readdir()
235 (bh->b_data + i); in ext4_readdir()
239 * least that it is non-zero. A in ext4_readdir()
240 * failure will be detected in the in ext4_readdir()
242 if (ext4_rec_len_from_disk(de->rec_len, in ext4_readdir()
243 sb->s_blocksize) < ext4_dir_rec_len(1, in ext4_readdir()
246 i += ext4_rec_len_from_disk(de->rec_len, in ext4_readdir()
247 sb->s_blocksize); in ext4_readdir()
250 ctx->pos = (ctx->pos & ~(sb->s_blocksize - 1)) in ext4_readdir()
252 file->f_version = inode_query_iversion(inode); in ext4_readdir()
255 while (ctx->pos < inode->i_size in ext4_readdir()
256 && offset < sb->s_blocksize) { in ext4_readdir()
257 de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); in ext4_readdir()
258 if (ext4_check_dir_entry(inode, file, de, bh, in ext4_readdir()
259 bh->b_data, bh->b_size, in ext4_readdir()
264 ctx->pos = (ctx->pos | in ext4_readdir()
265 (sb->s_blocksize - 1)) + 1; in ext4_readdir()
268 offset += ext4_rec_len_from_disk(de->rec_len, in ext4_readdir()
269 sb->s_blocksize); in ext4_readdir()
270 if (le32_to_cpu(de->inode)) { in ext4_readdir()
272 if (!dir_emit(ctx, de->name, in ext4_readdir()
273 de->name_len, in ext4_readdir()
274 le32_to_cpu(de->inode), in ext4_readdir()
275 get_dtype(sb, de->file_type))) in ext4_readdir()
280 FSTR_INIT(de->name, in ext4_readdir()
281 de->name_len); in ext4_readdir()
285 EXT4_DIRENT_HASH(de), in ext4_readdir()
286 EXT4_DIRENT_MINOR_HASH(de), in ext4_readdir()
294 le32_to_cpu(de->inode), in ext4_readdir()
295 get_dtype(sb, de->file_type))) in ext4_readdir()
299 ctx->pos += ext4_rec_len_from_disk(de->rec_len, in ext4_readdir()
300 sb->s_blocksize); in ext4_readdir()
302 if ((ctx->pos < inode->i_size) && !dir_relax_shared(inode)) in ext4_readdir()
330 * FMODE_64BITHASH explicitly. On the other hand, we allow ext4 to be mounted
331 * directly on both 32-bit and 64-bit nodes, under such case, neither
336 if ((filp->f_mode & FMODE_32BITHASH) || in hash2pos()
337 (!(filp->f_mode & FMODE_64BITHASH) && is_32bit_api())) in hash2pos()
345 if ((filp->f_mode & FMODE_32BITHASH) || in pos2maj_hash()
346 (!(filp->f_mode & FMODE_64BITHASH) && is_32bit_api())) in pos2maj_hash()
354 if ((filp->f_mode & FMODE_32BITHASH) || in pos2min_hash()
355 (!(filp->f_mode & FMODE_64BITHASH) && is_32bit_api())) in pos2min_hash()
362 * Return 32- or 64-bit end-of-file for dx directories
366 if ((filp->f_mode & FMODE_32BITHASH) || in ext4_get_htree_eof()
367 (!(filp->f_mode & FMODE_64BITHASH) && is_32bit_api())) in ext4_get_htree_eof()
379 * Because we may return a 64-bit hash that is well beyond offset limits,
383 * For non-htree, ext4_llseek already chooses the proper max offset.
387 struct inode *inode = file->f_mapping->host; in ext4_dir_llseek()
396 file->f_version = inode_peek_iversion(inode) - 1; in ext4_dir_llseek()
401 * This structure holds the nodes of the red-black tree used to store
416 * This functoin implements a non-recursive way of freeing all of the
417 * nodes in the red-black tree.
426 fname = fname->next; in free_rb_tree_fname()
442 p->curr_hash = pos2maj_hash(filp, pos); in ext4_htree_create_dir_info()
443 p->curr_minor_hash = pos2min_hash(filp, pos); in ext4_htree_create_dir_info()
449 free_rb_tree_fname(&p->root); in ext4_htree_free_dir_info()
470 info = dir_file->private_data; in ext4_htree_store_dirent()
471 p = &info->root.rb_node; in ext4_htree_store_dirent()
474 len = sizeof(struct fname) + ent_name->len + 1; in ext4_htree_store_dirent()
477 return -ENOMEM; in ext4_htree_store_dirent()
478 new_fn->hash = hash; in ext4_htree_store_dirent()
479 new_fn->minor_hash = minor_hash; in ext4_htree_store_dirent()
480 new_fn->inode = le32_to_cpu(dirent->inode); in ext4_htree_store_dirent()
481 new_fn->name_len = ent_name->len; in ext4_htree_store_dirent()
482 new_fn->file_type = dirent->file_type; in ext4_htree_store_dirent()
483 memcpy(new_fn->name, ent_name->name, ent_name->len); in ext4_htree_store_dirent()
493 if ((new_fn->hash == fname->hash) && in ext4_htree_store_dirent()
494 (new_fn->minor_hash == fname->minor_hash)) { in ext4_htree_store_dirent()
495 new_fn->next = fname->next; in ext4_htree_store_dirent()
496 fname->next = new_fn; in ext4_htree_store_dirent()
500 if (new_fn->hash < fname->hash) in ext4_htree_store_dirent()
501 p = &(*p)->rb_left; in ext4_htree_store_dirent()
502 else if (new_fn->hash > fname->hash) in ext4_htree_store_dirent()
503 p = &(*p)->rb_right; in ext4_htree_store_dirent()
504 else if (new_fn->minor_hash < fname->minor_hash) in ext4_htree_store_dirent()
505 p = &(*p)->rb_left; in ext4_htree_store_dirent()
506 else /* if (new_fn->minor_hash > fname->minor_hash) */ in ext4_htree_store_dirent()
507 p = &(*p)->rb_right; in ext4_htree_store_dirent()
510 rb_link_node(&new_fn->rb_hash, parent, p); in ext4_htree_store_dirent()
511 rb_insert_color(&new_fn->rb_hash, &info->root); in ext4_htree_store_dirent()
525 struct dir_private_info *info = file->private_data; in call_filldir()
527 struct super_block *sb = inode->i_sb; in call_filldir()
532 inode->i_ino, current->comm); in call_filldir()
535 ctx->pos = hash2pos(file, fname->hash, fname->minor_hash); in call_filldir()
537 if (!dir_emit(ctx, fname->name, in call_filldir()
538 fname->name_len, in call_filldir()
539 fname->inode, in call_filldir()
540 get_dtype(sb, fname->file_type))) { in call_filldir()
541 info->extra_fname = fname; in call_filldir()
544 fname = fname->next; in call_filldir()
551 struct dir_private_info *info = file->private_data; in ext4_dx_readdir()
557 info = ext4_htree_create_dir_info(file, ctx->pos); in ext4_dx_readdir()
559 return -ENOMEM; in ext4_dx_readdir()
560 file->private_data = info; in ext4_dx_readdir()
563 if (ctx->pos == ext4_get_htree_eof(file)) in ext4_dx_readdir()
567 if (info->last_pos != ctx->pos) { in ext4_dx_readdir()
568 free_rb_tree_fname(&info->root); in ext4_dx_readdir()
569 info->curr_node = NULL; in ext4_dx_readdir()
570 info->extra_fname = NULL; in ext4_dx_readdir()
571 info->curr_hash = pos2maj_hash(file, ctx->pos); in ext4_dx_readdir()
572 info->curr_minor_hash = pos2min_hash(file, ctx->pos); in ext4_dx_readdir()
579 if (info->extra_fname) { in ext4_dx_readdir()
580 if (call_filldir(file, ctx, info->extra_fname)) in ext4_dx_readdir()
582 info->extra_fname = NULL; in ext4_dx_readdir()
584 } else if (!info->curr_node) in ext4_dx_readdir()
585 info->curr_node = rb_first(&info->root); in ext4_dx_readdir()
593 if ((!info->curr_node) || in ext4_dx_readdir()
594 !inode_eq_iversion(inode, file->f_version)) { in ext4_dx_readdir()
595 info->curr_node = NULL; in ext4_dx_readdir()
596 free_rb_tree_fname(&info->root); in ext4_dx_readdir()
597 file->f_version = inode_query_iversion(inode); in ext4_dx_readdir()
598 ret = ext4_htree_fill_tree(file, info->curr_hash, in ext4_dx_readdir()
599 info->curr_minor_hash, in ext4_dx_readdir()
600 &info->next_hash); in ext4_dx_readdir()
604 ctx->pos = ext4_get_htree_eof(file); in ext4_dx_readdir()
607 info->curr_node = rb_first(&info->root); in ext4_dx_readdir()
610 fname = rb_entry(info->curr_node, struct fname, rb_hash); in ext4_dx_readdir()
611 info->curr_hash = fname->hash; in ext4_dx_readdir()
612 info->curr_minor_hash = fname->minor_hash; in ext4_dx_readdir()
616 info->curr_node = rb_next(info->curr_node); in ext4_dx_readdir()
617 if (info->curr_node) { in ext4_dx_readdir()
618 fname = rb_entry(info->curr_node, struct fname, in ext4_dx_readdir()
620 info->curr_hash = fname->hash; in ext4_dx_readdir()
621 info->curr_minor_hash = fname->minor_hash; in ext4_dx_readdir()
623 if (info->next_hash == ~0) { in ext4_dx_readdir()
624 ctx->pos = ext4_get_htree_eof(file); in ext4_dx_readdir()
627 info->curr_hash = info->next_hash; in ext4_dx_readdir()
628 info->curr_minor_hash = 0; in ext4_dx_readdir()
632 info->last_pos = ctx->pos; in ext4_dx_readdir()
638 if (filp->private_data) in ext4_release_dir()
639 ext4_htree_free_dir_info(filp->private_data); in ext4_release_dir()
647 struct ext4_dir_entry_2 *de; in ext4_check_all_de() local
652 de = (struct ext4_dir_entry_2 *)buf; in ext4_check_all_de()
654 while ((char *) de < top) { in ext4_check_all_de()
655 if (ext4_check_dir_entry(dir, NULL, de, bh, in ext4_check_all_de()
657 return -EFSCORRUPTED; in ext4_check_all_de()
658 rlen = ext4_rec_len_from_disk(de->rec_len, buf_size); in ext4_check_all_de()
659 de = (struct ext4_dir_entry_2 *)((char *)de + rlen); in ext4_check_all_de()
662 if ((char *) de > top) in ext4_check_all_de()
663 return -EFSCORRUPTED; in ext4_check_all_de()