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authorAndreas Gruenbacher <agruenba@redhat.com>2017-09-22 16:34:46 +0300
committerBob Peterson <rpeterso@redhat.com>2017-09-25 20:33:19 +0300
commit38eedf2841b03b779710e8ad0442810a4747a348 (patch)
tree4ee6e4833767f5790c8d02116a7e3212af9bd6f3 /fs/gfs2/inode.c
parent9b7c2ddb453e0c8c7529b562e7581d99e970b8b4 (diff)
downloadlinux-38eedf2841b03b779710e8ad0442810a4747a348.tar.xz
gfs2: Support negative atimes
When inodes are read from disk, GFS2 will only update in-memory atimes older than the on-disk atimes; this prevents atimes from going backwards. The atimes of newly allocated inodes are initialized to 0. This means that when an atime is explicitly set to a negative value, this value will not persist. Fix by setting the atime of newly allocated inodes to the lowest possible value instead of 0. Fixes xfstest generic/258. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 863749e29bf9..b288cf2f85e6 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -189,7 +189,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
gfs2_set_iop(inode);
- inode->i_atime.tv_sec = 0;
+ /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
+ inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
inode->i_atime.tv_nsec = 0;
unlock_new_inode(inode);