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Set sb->s_time_gran to support nsecs

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We missed initializing sb->s_time_gran which controls how some parts of
the kernel truncate the granularity of nsec in timespec.  Some paths
don't use it at all so time would be maintained at full precision.  But
other paths, particularly setattr_copy() from userspace and
notify_change() from the kernel use it to truncate as times are set.

Setting s_time_gran to 1 maintains full nsec precision.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2023-03-24 10:50:34 -07:00
parent 409631ceb1
commit bb01a3990f
1 changed files with 1 additions and 0 deletions
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kmod/src/super.c
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@@ -486,6 +486,7 @@ static int scoutfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_export_op = &scoutfs_export_ops;
sb->s_xattr = scoutfs_xattr_handlers;
sb->s_flags |= MS_I_VERSION | MS_POSIXACL;
sb->s_time_gran = 1;
/* btree blocks use long lived bh->b_data refs */
mapping_set_gfp_mask(sb->s_bdev->bd_inode->i_mapping, GFP_NOFS);