CURRENT_TIME is not y2038 safe.
CURRENT_TIME macro is also not appropriate for filesystems as it doesn't use the right granularity for filesystem timestamps.
Logical Volume Integrity format is described to have the same timestamp format for "Recording Date and time" as the other [a,c,m]timestamps. The function udf_time_to_disk_format() does this conversion. Hence the timestamp is passed directly to the function and not truncated. This is as per Arnd's suggestion on the thread.
This is also in preparation for the patch that transitions vfs timestamps to use 64 bit time and hence make them y2038 safe. As part of the effort current_time() will be extended to do range checks.
Signed-off-by: Deepa Dinamani deepa.kernel@gmail.com Reviewed-by: Jan Kara jack@suse.cz Reviewed-by: Arnd Bergmann arnd@arndb.de --- fs/udf/super.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/fs/udf/super.c b/fs/udf/super.c index 4942549..967ad87 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -1986,6 +1986,7 @@ static void udf_open_lvid(struct super_block *sb) struct buffer_head *bh = sbi->s_lvid_bh; struct logicalVolIntegrityDesc *lvid; struct logicalVolIntegrityDescImpUse *lvidiu; + struct timespec ts;
if (!bh) return; @@ -1997,8 +1998,8 @@ 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; - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, - CURRENT_TIME); + ktime_get_real_ts(&ts); + udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
lvid->descTag.descCRC = cpu_to_le16( @@ -2019,6 +2020,7 @@ static void udf_close_lvid(struct super_block *sb) struct buffer_head *bh = sbi->s_lvid_bh; struct logicalVolIntegrityDesc *lvid; struct logicalVolIntegrityDescImpUse *lvidiu; + struct timespec ts;
if (!bh) return; @@ -2030,7 +2032,8 @@ 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; - udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); + ktime_get_real_ts(&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))