| Message ID | 1475342614-18439-1-git-send-email-deepa.kernel@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sat, Oct 01, 2016 at 10:23:34AM -0700, Deepa Dinamani wrote: > btrfs_root_item maintains the ctime for root updates. > This is not part of vfs_inode. > > Since current_time() uses struct inode* as an argument > as Linus suggested, this cannot be used to update root > times unless, we modify the signature to use inode. > > Since btrfs uses nanosecond time granularity, it can also > use ktime_get_real_ts directly to obtain timestamp for > the root. It is necessary to use the timespec time api > here because the same btrfs_set_stack_timespec_*() apis > are used for vfs inode times as well. These can be > transitioned to using timespec64 when btrfs internally > changes to use timespec64 as well. > > Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> > Cc: Chris Mason <clm@fb.com> > Cc: David Sterba <dsterba@suse.com> Acked-by: David Sterba <dsterba@suse.com> > Cc: Josef Bacik <jbacik@fb.com> > Cc: linux-btrfs@vger.kernel.org > --- > Changes from previous version: > * Separated from the current_time() api series. > * Moved ktime_get_real_ts() outside of spin lock. > > fs/btrfs/root-tree.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c > index 0912960..17e5a5f 100644 > --- a/fs/btrfs/root-tree.c > +++ b/fs/btrfs/root-tree.c > @@ -505,8 +505,9 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans, > struct btrfs_root *root) > { > struct btrfs_root_item *item = &root->root_item; > - struct timespec ct = current_fs_time(root->fs_info->sb); > + struct timespec ct; > > + ktime_get_real_ts(&ct); > spin_lock(&root->root_item_lock); > btrfs_set_root_ctransid(item, trans->transid); > btrfs_set_stack_timespec_sec(&item->ctime, ct.tv_sec); > -- > 2.7.4 > > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 0912960..17e5a5f 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -505,8 +505,9 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans, struct btrfs_root *root) { struct btrfs_root_item *item = &root->root_item; - struct timespec ct = current_fs_time(root->fs_info->sb); + struct timespec ct; + ktime_get_real_ts(&ct); spin_lock(&root->root_item_lock); btrfs_set_root_ctransid(item, trans->transid); btrfs_set_stack_timespec_sec(&item->ctime, ct.tv_sec);
btrfs_root_item maintains the ctime for root updates. This is not part of vfs_inode. Since current_time() uses struct inode* as an argument as Linus suggested, this cannot be used to update root times unless, we modify the signature to use inode. Since btrfs uses nanosecond time granularity, it can also use ktime_get_real_ts directly to obtain timestamp for the root. It is necessary to use the timespec time api here because the same btrfs_set_stack_timespec_*() apis are used for vfs inode times as well. These can be transitioned to using timespec64 when btrfs internally changes to use timespec64 as well. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Chris Mason <clm@fb.com> Cc: David Sterba <dsterba@suse.com> Cc: Josef Bacik <jbacik@fb.com> Cc: linux-btrfs@vger.kernel.org --- Changes from previous version: * Separated from the current_time() api series. * Moved ktime_get_real_ts() outside of spin lock. fs/btrfs/root-tree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)