From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8B5821DF995 for ; Thu, 17 Oct 2024 17:19:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.60.130.6 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729185591; cv=none; b=qjvHise16MS1eulKbnwJ1B8A4JAcr5DI6qY6kS7Esz9skKrxMVsLTWZ7bpwwa+XVQqKIGgnBpQj0hL22g31mVFxJ+ciymP4l/rL4ve5tTd11rBSuUdqvZibtsQatk9nRnbaLl9IrvqEGGFqudHPXdft+Tx8TbrcxhjOJ6B4DBUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729185591; c=relaxed/simple; bh=yfKascS/xJJlN1ROjdzDMH3DDDe6Rhm4VWwop5GXHfk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=D6aRA23OX0XTkzcOOjYQEWq+lVvxPmgMqiq/TMMI7vI2oCjSNVCHFZ9tC+SA1mVPTyGlGQwbBNkN0QG10BBDGSezH/fCXtkR21MasxHTYGp2FQGXX/VL95hknXny6ykoAkdvB6nAmBLh1hOq8XYeMnqVoO0zmuLR9bkAS14heeg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=EN8za9Gk; arc=none smtp.client-ip=178.60.130.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="EN8za9Gk" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=DmYsijrMytC8SNO280RXXNMN0H00pJ7PPqf5D1hPZoM=; b=EN8za9GkVIfT87LksMVL5bY4zz eUUf2Pd3b6f8l8PuoSSHIqqHNh+XiZOh2KdKc/DuJ35McOzJ45gjafl6/8RRPyKdLOMFumrIprGwa 28kVH9ppooezfxRkOLRMcByerNCvqe4OTQRrDGqilXkol0h/tp30jrOCXlJ0t224PN2vfkTPuxC/6 gnpVDiaqJDOKzLR+GU4FOXoVMz0Qyg5+Wc4gvxfkaDRQKNiY1Io5R0ofUgnnpz1aP/it8VbT3mgcm o2beLWrTGIhViozv7j9DYhOY7wgY0TvzMRE2GSrugstx11DelHboasEPTaED+U/6tcN3sOMFQxJkl m8hJ4giQ==; Received: from 179-125-64-237-dinamico.pombonet.net.br ([179.125.64.237] helo=quatroqueijos.lan) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1t1UA3-00Biqr-7i; Thu, 17 Oct 2024 19:19:43 +0200 From: Thadeu Lima de Souza Cascardo To: stable@vger.kernel.org Cc: Jan Kara , kernel-dev@igalia.com, Thadeu Lima de Souza Cascardo Subject: [PATCH 6.1 07/19] udf: Convert udf_readdir() to new directory iteration Date: Thu, 17 Oct 2024 14:19:03 -0300 Message-Id: <20241017171915.311132-8-cascardo@igalia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241017171915.311132-1-cascardo@igalia.com> References: <20241017171915.311132-1-cascardo@igalia.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jan Kara [ Upstream commit 7cd7a36ab44d3e8c1dee7185ef407b9831a8220b ] Convert udf_readdir() to new directory iteration functions. Signed-off-by: Jan Kara Signed-off-by: Thadeu Lima de Souza Cascardo --- fs/udf/dir.c | 148 ++++++++++----------------------------------------- 1 file changed, 27 insertions(+), 121 deletions(-) diff --git a/fs/udf/dir.c b/fs/udf/dir.c index be640f4b2f2c..212393b12c22 100644 --- a/fs/udf/dir.c +++ b/fs/udf/dir.c @@ -39,26 +39,13 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) { struct inode *dir = file_inode(file); - struct udf_inode_info *iinfo = UDF_I(dir); - struct udf_fileident_bh fibh = { .sbh = NULL, .ebh = NULL}; - struct fileIdentDesc *fi = NULL; - struct fileIdentDesc cfi; - udf_pblk_t block, iblock; loff_t nf_pos, emit_pos = 0; int flen; - unsigned char *fname = NULL, *copy_name = NULL; - unsigned char *nameptr; - uint16_t liu; - uint8_t lfi; - loff_t size = udf_ext0_offset(dir) + dir->i_size; - struct buffer_head *tmp, *bha[16]; - struct kernel_lb_addr eloc; - uint32_t elen; - sector_t offset; - int i, num, ret = 0; - struct extent_position epos = { NULL, 0, {0, 0} }; + unsigned char *fname = NULL; + int ret = 0; struct super_block *sb = dir->i_sb; bool pos_valid = false; + struct udf_fileident_iter iter; if (ctx->pos == 0) { if (!dir_emit_dot(file, ctx)) @@ -66,7 +53,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) ctx->pos = 1; } nf_pos = (ctx->pos - 1) << 2; - if (nf_pos >= size) + if (nf_pos >= dir->i_size) goto out; /* @@ -90,138 +77,57 @@ static int udf_readdir(struct file *file, struct dir_context *ctx) goto out; } - if (nf_pos == 0) - nf_pos = udf_ext0_offset(dir); - - fibh.soffset = fibh.eoffset = nf_pos & (sb->s_blocksize - 1); - if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { - if (inode_bmap(dir, nf_pos >> sb->s_blocksize_bits, - &epos, &eloc, &elen, &offset) - != (EXT_RECORDED_ALLOCATED >> 30)) { - ret = -ENOENT; - goto out; - } - block = udf_get_lb_pblock(sb, &eloc, offset); - if ((++offset << sb->s_blocksize_bits) < elen) { - if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) - epos.offset -= sizeof(struct short_ad); - else if (iinfo->i_alloc_type == - ICBTAG_FLAG_AD_LONG) - epos.offset -= sizeof(struct long_ad); - } else { - offset = 0; - } - - if (!(fibh.sbh = fibh.ebh = udf_tread(sb, block))) { - ret = -EIO; - goto out; - } - - if (!(offset & ((16 >> (sb->s_blocksize_bits - 9)) - 1))) { - i = 16 >> (sb->s_blocksize_bits - 9); - if (i + offset > (elen >> sb->s_blocksize_bits)) - i = (elen >> sb->s_blocksize_bits) - offset; - for (num = 0; i > 0; i--) { - block = udf_get_lb_pblock(sb, &eloc, offset + i); - tmp = udf_tgetblk(sb, block); - if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp)) - bha[num++] = tmp; - else - brelse(tmp); - } - if (num) { - bh_readahead_batch(num, bha, REQ_RAHEAD); - for (i = 0; i < num; i++) - brelse(bha[i]); - } - } - } - - while (nf_pos < size) { + for (ret = udf_fiiter_init(&iter, dir, nf_pos); + !ret && iter.pos < dir->i_size; + ret = udf_fiiter_advance(&iter)) { struct kernel_lb_addr tloc; - loff_t cur_pos = nf_pos; + udf_pblk_t iblock; - /* Update file position only if we got past the current one */ - if (nf_pos >= emit_pos) { - ctx->pos = (nf_pos >> 2) + 1; - pos_valid = true; - } - - fi = udf_fileident_read(dir, &nf_pos, &fibh, &cfi, &epos, &eloc, - &elen, &offset); - if (!fi) - goto out; /* Still not at offset where user asked us to read from? */ - if (cur_pos < emit_pos) + if (iter.pos < emit_pos) continue; - liu = le16_to_cpu(cfi.lengthOfImpUse); - lfi = cfi.lengthFileIdent; - - if (fibh.sbh == fibh.ebh) { - nameptr = udf_get_fi_ident(fi); - } else { - int poffset; /* Unpaded ending offset */ - - poffset = fibh.soffset + sizeof(struct fileIdentDesc) + liu + lfi; - - if (poffset >= lfi) { - nameptr = (char *)(fibh.ebh->b_data + poffset - lfi); - } else { - if (!copy_name) { - copy_name = kmalloc(UDF_NAME_LEN, - GFP_NOFS); - if (!copy_name) { - ret = -ENOMEM; - goto out; - } - } - nameptr = copy_name; - memcpy(nameptr, udf_get_fi_ident(fi), - lfi - poffset); - memcpy(nameptr + lfi - poffset, - fibh.ebh->b_data, poffset); - } - } + /* Update file position only if we got past the current one */ + pos_valid = true; + ctx->pos = (iter.pos >> 2) + 1; - if ((cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { + if (iter.fi.fileCharacteristics & FID_FILE_CHAR_DELETED) { if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) continue; } - if ((cfi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { + if (iter.fi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) { if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) continue; } - if (cfi.fileCharacteristics & FID_FILE_CHAR_PARENT) { + if (iter.fi.fileCharacteristics & FID_FILE_CHAR_PARENT) { if (!dir_emit_dotdot(file, ctx)) - goto out; + goto out_iter; continue; } - flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN); + flen = udf_get_filename(sb, iter.name, + iter.fi.lengthFileIdent, fname, UDF_NAME_LEN); if (flen < 0) continue; - tloc = lelb_to_cpu(cfi.icb.extLocation); + tloc = lelb_to_cpu(iter.fi.icb.extLocation); iblock = udf_get_lb_pblock(sb, &tloc, 0); if (!dir_emit(ctx, fname, flen, iblock, DT_UNKNOWN)) - goto out; - } /* end while */ - - ctx->pos = (nf_pos >> 2) + 1; - pos_valid = true; + goto out_iter; + } + if (!ret) { + ctx->pos = (iter.pos >> 2) + 1; + pos_valid = true; + } +out_iter: + udf_fiiter_release(&iter); out: if (pos_valid) file->f_version = inode_query_iversion(dir); - if (fibh.sbh != fibh.ebh) - brelse(fibh.ebh); - brelse(fibh.sbh); - brelse(epos.bh); kfree(fname); - kfree(copy_name); return ret; } -- 2.34.1