From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Thu, 30 Jan 2020 06:27:16 +0000 (-0500)
Subject: relayd: replace uses of block FDs by the fs_handle interface
X-Git-Tag: v2.12.0-rc1~36
X-Git-Url: https://git.lttng.org/?a=commitdiff_plain;h=8bb66c3cd60938352927ee865759433387324250;hp=8bb66c3cd60938352927ee865759433387324250;p=lttng-tools.git

relayd: replace uses of block FDs by the fs_handle interface

Replace all usage of "raw" block-device file descriptors for
relay_streams, viewer_streams, and index files by the fs_handle.

Wrappers are introduced for read, write, seek and truncate operations
in order to reduce code duplication as all uses of fs_handles implies
getting an fd, using it, and putting it back. Those operations allow
the fd-tracker to suspend and restore fs_handles as needed.

The stream_fd util is eliminated as it is completely replaced by
the fs_handle interface.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Iedff88d27aeba3891d4e8818b9e08e4b16a927cc
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