For checkpoint/restore of timerfd files we need to know the clock type being used on timerfd creation. Thus implement show_fdinfo method where we print out the type. Also to minimize the number of calls print out the ticks as well (thus one read of fdinfo entry would eliminate the need of doing read() over timerfd itself). CC: Shawn Landden CC: Thomas Gleixner CC: Andrew Morton CC: Andrey Vagin CC: Pavel Emelyanov Signed-off-by: Cyrill Gorcunov --- fs/timerfd.c | 9 +++++++++ 1 file changed, 9 insertions(+) Index: linux-2.6.git/fs/timerfd.c =================================================================== --- linux-2.6.git.orig/fs/timerfd.c +++ linux-2.6.git/fs/timerfd.c @@ -284,11 +284,20 @@ static ssize_t timerfd_read(struct file return res; } +static int timerfd_show(struct seq_file *m, struct file *file) +{ + struct timerfd_ctx *ctx = file->private_data; + + return seq_printf(m, "clockid: %d ticks: %llu\n", + ctx->clockid, (unsigned long long)ctx->ticks); +} + static const struct file_operations timerfd_fops = { .release = timerfd_release, .poll = timerfd_poll, .read = timerfd_read, .llseek = noop_llseek, + .show_fdinfo = timerfd_show, }; static int timerfd_fget(int fd, struct fd *p) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/