Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753640AbZCIIqc (ORCPT ); Mon, 9 Mar 2009 04:46:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752122AbZCIIqY (ORCPT ); Mon, 9 Mar 2009 04:46:24 -0400 Received: from out4.smtp.messagingengine.com ([66.111.4.28]:48955 "EHLO out4.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751939AbZCIIqX (ORCPT ); Mon, 9 Mar 2009 04:46:23 -0400 X-Sasl-enc: euJLq5QKOICXgaSb3Q7nF5AW4O+gCcf/Kw4v1VCy6xTi 1236588380 Message-ID: <49B4D758.8000304@ladisch.de> Date: Mon, 09 Mar 2009 09:46:16 +0100 From: Clemens Ladisch User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 To: Jan Kara CC: linux-kernel@vger.kernel.org Subject: [PATCH] udf: use hardware sector size Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6136 Lines: 183 This patch makes the UDF FS driver use the hardware sector size as the default logical block size, which is required by the UDF specifications. While the previous default of 2048 bytes was correct for optical disks, it was not for hard disks or USB storage devices, and made it impossible to use such a device with the default mount options. (The Linux mkudffs tool uses a default block size of 2048 bytes even on devices with smaller hardware sectors, so this bug is unlikely to be noticed unless UDF-formatted USB storage devices are exchanged with other OSs.) To avoid regressions for people who use loopback optical disk images or who used the (sometimes wrong) defaults of mkudffs, we also try with a block size of 2048 bytes if no anchor was found with the hardware sector size. Signed-off-by: Clemens Ladisch --- linux-2.6.orig/fs/udf/udf_sb.h +++ linux-2.6/fs/udf/udf_sb.h @@ -30,6 +30,7 @@ #define UDF_FLAG_GID_SET 16 #define UDF_FLAG_SESSION_SET 17 #define UDF_FLAG_LASTBLOCK_SET 18 +#define UDF_FLAG_BLOCKSIZE_SET 19 #define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001 #define UDF_PART_FLAG_UNALLOC_TABLE 0x0002 --- linux-2.6.orig/fs/udf/super.c +++ linux-2.6/fs/udf/super.c @@ -86,7 +86,7 @@ static int udf_remount_fs(struct super_b static int udf_check_valid(struct super_block *, int, int); static int udf_vrs(struct super_block *sb, int silent); static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); -static void udf_find_anchor(struct super_block *); +static int udf_find_anchor(struct super_block *); static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *); static void udf_load_fileset(struct super_block *, struct buffer_head *, @@ -258,7 +258,7 @@ static int udf_show_options(struct seq_f if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) seq_puts(seq, ",nostrict"); - if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) + if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) seq_printf(seq, ",bs=%lu", sb->s_blocksize); if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) seq_puts(seq, ",unhide"); @@ -405,7 +405,6 @@ static int udf_parse_options(char *optio int option; uopt->novrs = 0; - uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; uopt->partition = 0xFFFF; uopt->session = 0xFFFFFFFF; uopt->lastblock = 0; @@ -433,6 +432,7 @@ static int udf_parse_options(char *optio if (match_int(&args[0], &option)) return 0; uopt->blocksize = option; + uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); break; case Opt_unhide: uopt->flags |= (1 << UDF_FLAG_UNHIDE); @@ -761,12 +761,13 @@ static sector_t udf_scan_anchors(struct * Return 1 if not found, 0 if ok * */ -static void udf_find_anchor(struct super_block *sb) +static int udf_find_anchor(struct super_block *sb) { sector_t lastblock; struct buffer_head *bh = NULL; uint16_t ident; int i; + int anchor_found = 0; struct udf_sb_info *sbi = UDF_SB(sb); lastblock = udf_scan_anchors(sb, sbi->s_last_block); @@ -804,10 +805,13 @@ check_anchor: brelse(bh); if (ident != TAG_IDENT_AVDP) sbi->s_anchor[i] = 0; + else + anchor_found = 1; } } sbi->s_last_block = lastblock; + return !anchor_found; } static int udf_find_fileset(struct super_block *sb, @@ -1679,6 +1683,32 @@ static int udf_check_valid(struct super_ return !block; } +static int udf_check_blocksize(struct super_block *sb, + struct udf_options *uopt, int silent) +{ + struct udf_sb_info *sbi = UDF_SB(sb); + + if (!sb_set_blocksize(sb, uopt->blocksize)) { + if (!silent) + printk(KERN_WARNING "UDF-fs: Bad block size\n"); + return 1; + } + sbi->s_last_block = uopt->lastblock; + if (udf_check_valid(sb, uopt->novrs, silent)) { + if (!silent) + printk(KERN_WARNING "UDF-fs: No VRS found\n"); + return 1; + } + sbi->s_anchor[0] = sbi->s_anchor[1] = 0; + sbi->s_anchor[2] = uopt->anchor; + if (udf_find_anchor(sb)) { + if (!silent) + printk(KERN_WARNING "UDF-fs: No anchor found\n"); + return 1; + } + return 0; +} + static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset) { struct anchorVolDescPtr *anchor; @@ -1847,6 +1877,8 @@ static void udf_free_partition(struct ud static int udf_fill_super(struct super_block *sb, void *options, int silent) { int i; + int no_anchor; + int is_default_blocksize; struct inode *inode = NULL; struct udf_options uopt; kernel_lb_addr rootdir, fileset; @@ -1895,13 +1927,6 @@ static int udf_fill_super(struct super_b sbi->s_umask = uopt.umask; sbi->s_nls_map = uopt.nls_map; - /* Set the block size for all transfers */ - if (!sb_min_blocksize(sb, uopt.blocksize)) { - udf_debug("Bad block size (%d)\n", uopt.blocksize); - printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); - goto error_out; - } - if (uopt.session == 0xFFFFFFFF) sbi->s_session = udf_get_last_session(sb); else @@ -1909,17 +1934,20 @@ static int udf_fill_super(struct super_b udf_debug("Multi-session=%d\n", sbi->s_session); - sbi->s_last_block = uopt.lastblock; - sbi->s_anchor[0] = sbi->s_anchor[1] = 0; - sbi->s_anchor[2] = uopt.anchor; - - if (udf_check_valid(sb, uopt.novrs, silent)) { - /* read volume recognition sequences */ - printk(KERN_WARNING "UDF-fs: No VRS found\n"); - goto error_out; + if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { + no_anchor = udf_check_blocksize(sb, &uopt, silent); + } else { + uopt.blocksize = bdev_hardsect_size(sb->s_bdev); + is_default_blocksize = uopt.blocksize == UDF_DEFAULT_BLOCKSIZE; + no_anchor = udf_check_blocksize(sb, &uopt, silent || + !is_default_blocksize); + if (no_anchor && !is_default_blocksize) { + uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; + no_anchor = udf_check_blocksize(sb, &uopt, silent); + } } - - udf_find_anchor(sb); + if (no_anchor) + goto error_out; /* Fill in the rest of the superblock */ sb->s_op = &udf_sb_ops; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/