From 2ecc2dfe42707d8569e30f3b6a4526a0a825d479 Mon Sep 17 00:00:00 2001 From: Rob N Date: Wed, 17 Jan 2024 09:01:17 +1100 Subject: [PATCH] Linux 6.7 compat: zfs_setattr fix atime update In db4fc559c I messed up and changed this bit of code to set the inode atime to an uninitialised value, when actually it was just supposed to loading the atime from the inode to be stored in the SA. This changes it to what it should have been. Ensure times change by the right amount Previously, we only checked if the times changed at all, which missed a bug where the atime was being set to an undefined value. Now ensure the times change by two seconds (or thereabouts), ensuring we catch cases where we set the time to something bonkers Reviewed-by: Brian Behlendorf Signed-off-by: Rob Norris Sponsored-by: https://despairlabs.com/sponsor/ Closes #15762 Closes #15773 --- module/os/linux/zfs/zfs_vnops_os.c | 3 +-- tests/zfs-tests/cmd/ctime.c | 14 +++++++++++--- 2 files changed, 12 insertions(+), 5 deletions(-) diff --git a/module/os/linux/zfs/zfs_vnops_os.c b/module/os/linux/zfs/zfs_vnops_os.c index 65d1d786ae5a..9ea8ad5f4a65 100644 --- a/module/os/linux/zfs/zfs_vnops_os.c +++ b/module/os/linux/zfs/zfs_vnops_os.c @@ -2435,9 +2435,8 @@ zfs_setattr(znode_t *zp, vattr_t *vap, int flags, cred_t *cr, zidmap_t *mnt_ns) if ((mask & ATTR_ATIME) || zp->z_atime_dirty) { zp->z_atime_dirty = B_FALSE; - inode_timespec_t tmp_atime; + inode_timespec_t tmp_atime = zpl_inode_get_atime(ip); ZFS_TIME_ENCODE(&tmp_atime, atime); - zpl_inode_set_atime_to_ts(ZTOI(zp), tmp_atime); SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, &atime, sizeof (atime)); } diff --git a/tests/zfs-tests/cmd/ctime.c b/tests/zfs-tests/cmd/ctime.c index 0f5d81aea613..5ff1cea8a869 100644 --- a/tests/zfs-tests/cmd/ctime.c +++ b/tests/zfs-tests/cmd/ctime.c @@ -362,12 +362,20 @@ main(void) return (1); } - if (t1 == t2) { - (void) fprintf(stderr, "%s: t1(%ld) == t2(%ld)\n", + + /* + * Ideally, time change would be exactly two seconds, but allow + * a little slack in case of scheduling delays or similar. + */ + long delta = (long)t2 - (long)t1; + if (delta < 2 || delta > 4) { + (void) fprintf(stderr, + "%s: BAD time change: t1(%ld), t2(%ld)\n", timetest_table[i].name, (long)t1, (long)t2); return (1); } else { - (void) fprintf(stderr, "%s: t1(%ld) != t2(%ld)\n", + (void) fprintf(stderr, + "%s: good time change: t1(%ld), t2(%ld)\n", timetest_table[i].name, (long)t1, (long)t2); } }