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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-03-05 00:03:36 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2008-04-17 14:23:04 +0200 |
| commit | d0db181c072259c21a375b290a4574e5ce6d2b5f (patch) | |
| tree | 61cf137ac719c0ee229c6cc0d04c3f75d3f06ed6 /fs/udf | |
| parent | b80697c14dcacd83ed1b78e26ad93b25ecc52c5e (diff) | |
| download | linux-stable-d0db181c072259c21a375b290a4574e5ce6d2b5f.tar.gz linux-stable-d0db181c072259c21a375b290a4574e5ce6d2b5f.tar.bz2 linux-stable-d0db181c072259c21a375b290a4574e5ce6d2b5f.zip | |
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 <Yuri.Per@acronis.com>
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Max Lyadvinsky <Max.Lyadvinsky@acronis.com>
Cc: Vladimir Simonov <Vladimir.Simonov@acronis.com>
Cc: Andrew Neporada <Andrew.Neporada@acronis.com>
Cc: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
| -rw-r--r-- | fs/udf/super.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c index bb8d866deb3f..137153c5005b 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) |