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ext2: use ktime_get_real_seconds for timestamps 

get_seconds() is deprecated because of the y2038 overflow, so users
should migrate to 64-bit timestamps using ktime_get_real_seconds().
In ext2, the timestamps in the superblock and in the inode are all
limited to 32-bit, and this won't get fixed, so let's just stop
using the deprecated interface and keep truncating.

All users of ext2 should migrate to ext4 before 2038 to prevent this
from causing problems.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Arnd Bergmann 2018-06-20 16:31:40 +02:00 committed by Jan Kara
parent c3b9cecd89
commit fe2c32545b
2 changed files with 5 additions and 4 deletions
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2
fs/ext2/inode.c
View File

@ -86,7 +86,7 @@ void ext2_evict_inode(struct inode * inode)
if (want_delete) {
sb_start_intwrite(inode->i_sb);
/* set dtime */
EXT2_I(inode)->i_dtime = get_seconds();
EXT2_I(inode)->i_dtime = ktime_get_real_seconds();
mark_inode_dirty(inode);
__ext2_write_inode(inode, inode_needs_sync(inode));
/* truncate to 0 */

7
fs/ext2/super.c
View File

@ -682,7 +682,8 @@ static int ext2_setup_super (struct super_block * sb,
"running e2fsck is recommended");
else if (le32_to_cpu(es->s_checkinterval) &&
(le32_to_cpu(es->s_lastcheck) +
le32_to_cpu(es->s_checkinterval) <= get_seconds()))
le32_to_cpu(es->s_checkinterval) <=
ktime_get_real_seconds()))
ext2_msg(sb, KERN_WARNING,
"warning: checktime reached, "
"running e2fsck is recommended");
@ -1248,7 +1249,7 @@ void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es,
spin_lock(&EXT2_SB(sb)->s_lock);
es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb));
es->s_wtime = cpu_to_le32(get_seconds());
es->s_wtime = cpu_to_le32(ktime_get_real_seconds());
/* unlock before we do IO */
spin_unlock(&EXT2_SB(sb)->s_lock);
mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
@ -1360,7 +1361,7 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
* the rdonly flag and then mark the partition as valid again.
*/
es->s_state = cpu_to_le16(sbi->s_mount_state);
es->s_mtime = cpu_to_le32(get_seconds());
es->s_mtime = cpu_to_le32(ktime_get_real_seconds());
spin_unlock(&sbi->s_lock);
err = dquot_suspend(sb, -1);