From d0db181c072259c21a375b290a4574e5ce6d2b5f Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Wed, 5 Mar 2008 00:03:36 +0100 Subject: [PATCH] udf: fix anchor point detection According to ECMA 167 rev. 3 (see 3/8.4.2.1), Anchor Volume Descriptor Pointer should be recorded at two or more anchor points located at sectors 256, N, N - 256, where N - is a largest logical sector number at volume space. So we should always try to detect N on UDF volume before trying to find Anchor Volume Descriptor (i.e. calling to udf_find_anchor()). That said, all this patch does is updates the s_last_block even if the udf_vrs() returns positive value. Originally written and tested by Yuri Per, ported on latest mainline by me. Signed-off-by: Yuri Per Signed-off-by: Pavel Emelyanov Cc: Max Lyadvinsky Cc: Vladimir Simonov Cc: Andrew Neporada Cc: Kirill Korotaev Signed-off-by: Jan Kara --- fs/udf/super.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/fs/udf/super.c b/fs/udf/super.c index bb8d866deb3..137153c5005 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -1425,7 +1425,7 @@ static noinline int udf_process_sequence(struct super_block *sb, long block, static int udf_check_valid(struct super_block *sb, int novrs, int silent) { long block; - struct udf_sb_info *sbi; + struct udf_sb_info *sbi = UDF_SB(sb); if (novrs) { udf_debug("Validity check skipped because of novrs option\n"); @@ -1434,15 +1434,12 @@ static int udf_check_valid(struct super_block *sb, int novrs, int silent) /* Check that it is NSR02 compliant */ /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ block = udf_vrs(sb, silent); - if (block != -1) - return !block; - - sbi = UDF_SB(sb); - udf_debug("Failed to read byte 32768. Assuming open " - "disc. Skipping validity check\n"); - if (!sbi->s_last_block) + if (block == -1) + udf_debug("Failed to read byte 32768. Assuming open " + "disc. Skipping validity check\n"); + if (block && !sbi->s_last_block) sbi->s_last_block = udf_get_last_block(sb); - return 0; + return !block; } static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) -- 2.41.1