[PATCH 11/16] quota: avoid time_t in v1_disk_dqblk definition

Arnd Bergmann
2019-11-08T21:37:55Z

The time_t type is part of the user interface and not always the
same, with the move to 64-bit timestamps and the difference between
architectures.

Make the quota format definition independent of this type and use
a basic type of the same length. Make it unsigned in the process
to keep the v1 format working until year 2106 instead of 2038
on 32-bit architectures.

Hopefully, everybody has already moved to a newer format long
ago (v2 was introduced with linux-2.4), but it's hard to be sure.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
fs/quota/quotaio_v1.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/quota/quotaio_v1.h b/fs/quota/quotaio_v1.h
index bd11e2c08119..31dca9a89176 100644
--- a/fs/quota/quotaio_v1.h
+++ b/fs/quota/quotaio_v1.h
@@ -25,8 +25,10 @@ struct v1_disk_dqblk {
__u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
__u32 dqb_isoftlimit; /* preferred inode limit */
__u32 dqb_curinodes; /* current # allocated inodes */
- time_t dqb_btime; /* time limit for excessive disk use */
- time_t dqb_itime; /* time limit for excessive inode use */
+
+ /* below fields differ in length on 32-bit vs 64-bit architectures */
+ unsigned long dqb_btime; /* time limit for excessive disk use */
+ unsigned long dqb_itime; /* time limit for excessive inode use */
};

#define v1_dqoff(UID) ((loff_t)((UID) * sizeof (struct v1_disk_dqblk)))
--
2.20.0