diff options
Diffstat (limited to 'fs/hfs/btree.c')
| -rw-r--r-- | fs/hfs/btree.c | 63 |
1 files changed, 49 insertions, 14 deletions
diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c index 2fa4b1f8cc7f..7bc425283d49 100644 --- a/fs/hfs/btree.c +++ b/fs/hfs/btree.c @@ -21,8 +21,12 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke struct hfs_btree *tree; struct hfs_btree_header_rec *head; struct address_space *mapping; - struct page *page; + struct folio *folio; + struct buffer_head *bh; unsigned int size; + u16 dblock; + sector_t start_block; + loff_t offset; tree = kzalloc(sizeof(*tree), GFP_KERNEL); if (!tree) @@ -38,7 +42,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke tree->inode = iget_locked(sb, id); if (!tree->inode) goto free_tree; - BUG_ON(!(tree->inode->i_state & I_NEW)); + BUG_ON(!(inode_state_read_once(tree->inode) & I_NEW)); { struct hfs_mdb *mdb = HFS_SB(sb)->mdb; HFS_I(tree->inode)->flags = 0; @@ -75,12 +79,40 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke unlock_new_inode(tree->inode); mapping = tree->inode->i_mapping; - page = read_mapping_page(mapping, 0, NULL); - if (IS_ERR(page)) + folio = filemap_grab_folio(mapping, 0); + if (IS_ERR(folio)) goto free_inode; + folio_zero_range(folio, 0, folio_size(folio)); + + dblock = hfs_ext_find_block(HFS_I(tree->inode)->first_extents, 0); + start_block = HFS_SB(sb)->fs_start + (dblock * HFS_SB(sb)->fs_div); + + size = folio_size(folio); + offset = 0; + while (size > 0) { + size_t len; + + bh = sb_bread(sb, start_block); + if (!bh) { + pr_err("unable to read tree header\n"); + goto put_folio; + } + + len = min_t(size_t, folio_size(folio), sb->s_blocksize); + memcpy_to_folio(folio, offset, bh->b_data, sb->s_blocksize); + + brelse(bh); + + start_block++; + offset += len; + size -= len; + } + + folio_mark_uptodate(folio); + /* Load the header */ - head = (struct hfs_btree_header_rec *)(kmap_local_page(page) + + head = (struct hfs_btree_header_rec *)(kmap_local_folio(folio, 0) + sizeof(struct hfs_bnode_desc)); tree->root = be32_to_cpu(head->root); tree->leaf_count = be32_to_cpu(head->leaf_count); @@ -95,22 +127,22 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke size = tree->node_size; if (!is_power_of_2(size)) - goto fail_page; + goto fail_folio; if (!tree->node_count) - goto fail_page; + goto fail_folio; switch (id) { case HFS_EXT_CNID: if (tree->max_key_len != HFS_MAX_EXT_KEYLEN) { pr_err("invalid extent max_key_len %d\n", tree->max_key_len); - goto fail_page; + goto fail_folio; } break; case HFS_CAT_CNID: if (tree->max_key_len != HFS_MAX_CAT_KEYLEN) { pr_err("invalid catalog max_key_len %d\n", tree->max_key_len); - goto fail_page; + goto fail_folio; } break; default: @@ -121,12 +153,15 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke tree->pages_per_bnode = (tree->node_size + PAGE_SIZE - 1) >> PAGE_SHIFT; kunmap_local(head); - put_page(page); + folio_unlock(folio); + folio_put(folio); return tree; -fail_page: +fail_folio: kunmap_local(head); - put_page(page); +put_folio: + folio_unlock(folio); + folio_put(folio); free_inode: tree->inode->i_mapping->a_ops = &hfs_aops; iput(tree->inode); @@ -224,7 +259,7 @@ static struct hfs_bnode *hfs_bmap_new_bmap(struct hfs_bnode *prev, u32 idx) } /* Make sure @tree has enough space for the @rsvd_nodes */ -int hfs_bmap_reserve(struct hfs_btree *tree, int rsvd_nodes) +int hfs_bmap_reserve(struct hfs_btree *tree, u32 rsvd_nodes) { struct inode *inode = tree->inode; u32 count; @@ -329,7 +364,7 @@ void hfs_bmap_free(struct hfs_bnode *node) u32 nidx; u8 *data, byte, m; - hfs_dbg(BNODE_MOD, "btree_free_node: %u\n", node->this); + hfs_dbg("node %u\n", node->this); tree = node->tree; nidx = node->this; node = hfs_bnode_find(tree, 0); |