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| author | Steve Magnani <steve.magnani@digidescorp.com> | 2019-02-08 18:34:54 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-02-11 09:24:07 +0100 |
| commit | ebbd5e99f60aca79b6c723c17a4ad1a8f26fcd98 (patch) | |
| tree | c0d14e47537389c8724cd1add159d71294e12f7d /fs/udf | |
| parent | ext2: Fix underflow in ext2_max_size() (diff) | |
| download | linux-ebbd5e99f60aca79b6c723c17a4ad1a8f26fcd98.tar.xz linux-ebbd5e99f60aca79b6c723c17a4ad1a8f26fcd98.zip | |
udf: factor out LVID finalization for reuse
Centralize timestamping and CRC/checksum updating of the in-core
Logical Volume Integrity Descriptor, in preparation for adding
a third site where this functionality is needed.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
| -rw-r--r-- | fs/udf/super.c | 30 |
1 files changed, 14 insertions, 16 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c index e3d684ea3203..2d8742801060 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -1943,13 +1943,24 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, return 0; } +static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid) +{ + struct timespec64 ts; + + ktime_get_real_ts64(&ts); + udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); + lvid->descTag.descCRC = cpu_to_le16( + crc_itu_t(0, (char *)lvid + sizeof(struct tag), + le16_to_cpu(lvid->descTag.descCRCLength))); + lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); +} + static void udf_open_lvid(struct super_block *sb) { struct udf_sb_info *sbi = UDF_SB(sb); struct buffer_head *bh = sbi->s_lvid_bh; struct logicalVolIntegrityDesc *lvid; struct logicalVolIntegrityDescImpUse *lvidiu; - struct timespec64 ts; if (!bh) return; @@ -1961,18 +1972,12 @@ static void udf_open_lvid(struct super_block *sb) mutex_lock(&sbi->s_alloc_mutex); lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; - ktime_get_real_ts64(&ts); - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE) lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); else UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT); - lvid->descTag.descCRC = cpu_to_le16( - crc_itu_t(0, (char *)lvid + sizeof(struct tag), - le16_to_cpu(lvid->descTag.descCRCLength))); - - lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); + udf_finalize_lvid(lvid); mark_buffer_dirty(bh); sbi->s_lvid_dirty = 0; mutex_unlock(&sbi->s_alloc_mutex); @@ -1986,7 +1991,6 @@ static void udf_close_lvid(struct super_block *sb) struct buffer_head *bh = sbi->s_lvid_bh; struct logicalVolIntegrityDesc *lvid; struct logicalVolIntegrityDescImpUse *lvidiu; - struct timespec64 ts; if (!bh) return; @@ -1998,8 +2002,6 @@ static void udf_close_lvid(struct super_block *sb) mutex_lock(&sbi->s_alloc_mutex); lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; - ktime_get_real_ts64(&ts); - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) @@ -2009,17 +2011,13 @@ static void udf_close_lvid(struct super_block *sb) if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT)) lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); - lvid->descTag.descCRC = cpu_to_le16( - crc_itu_t(0, (char *)lvid + sizeof(struct tag), - le16_to_cpu(lvid->descTag.descCRCLength))); - - lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); /* * We set buffer uptodate unconditionally here to avoid spurious * warnings from mark_buffer_dirty() when previous EIO has marked * the buffer as !uptodate */ set_buffer_uptodate(bh); + udf_finalize_lvid(lvid); mark_buffer_dirty(bh); sbi->s_lvid_dirty = 0; mutex_unlock(&sbi->s_alloc_mutex); |