glusterfs.git/xlators/features/utime/src/utime-helpers.c, branch v5.4

ctime: Provide noatime option

2018-10-02T12:45:23+00:00

Most of the applications are {c|m}time dependant
and very few are atime dependant. So provide noatime
option to not update atime when ctime feature is
enabled.

Also this option has to be enabled with ctime
feature to avoid unnecessary self heal. Since
AFR/EC reads data from single subvolume, atime
is only updated in one subvolume triggering self
heal.

Backport of:
> Patch: https://review.gluster.org/21073
> BUG: 1593538
> Change-Id: I085fb33c882296545345f5df194cde7b6cbc337e
> Signed-off-by: Kotresh HR 
(cherry picked from commit 89636be4c73b12de2e11c75d8e59527bb243f147)

updates: bz#1633015
Change-Id: I085fb33c882296545345f5df194cde7b6cbc337e
Signed-off-by: Kotresh HR

Land part 2 of clang-format changes

2018-09-12T12:22:45+00:00

Change-Id: Ia84cc24c8924e6d22d02ac15f611c10e26db99b4
Signed-off-by: Nigel Babu

ctime: Fix self heal of symlink in EC volume

2018-06-20T06:51:21+00:00

Since IEEE Std 1003.1-2001 does not require any
association of file times with symbolic links,
there is no requirement that file times be
updated by readlink() states [1].

stat on symlink file was generating a readlink
fop on one of the subvolumes of ec set which
in turn updates atime on that subvolume. This
causes mdata xattr to be different across ec
set and hence self heal fails. So based on [1],
atime is no longer updated by readlink fop.

[1] http://pubs.opengroup.org/onlinepubs/009695399/functions/readlink.html

fixes: bz#1592509
Change-Id: I08bd3ca3bdb222bd18160b1aa58fc2f7630c8083
Signed-off-by: Kotresh HR

ctime: Fix updating ctime in rename and unlink

2018-05-24T05:34:40+00:00

1. Successful rename was not updating ctime.
   Fixed the same.
2. Successful unlink when link count is more than 1
   was not updating ctime. Fixed the same.
3. Copy ctime and flags during frame copy.

fixes: bz#1580020
Change-Id: Ied47275a36aea60254b2add7a59128a9c83b3645
Signed-off-by: Kotresh HR

utime: ctime client side xlator

2018-05-06T01:39:18+00:00

The client side utime xlator does two things.

1. Update unix epoch time in frame->root->ctime
2. Update the frame->root->flags based on the fop
   which indicates time attributes that should be
   updated for the parent/entry.

Credits: Rafi KC 
Updates: #208
Change-Id: I9cad297040c70798a0a8468a080eb4aeff73138d
Signed-off-by: Kotresh HR