From 262d13d62b85bc62dfb2b0aa888d621081b8fa65 Mon Sep 17 00:00:00 2001
From: Vincent Legoll <address@hidden>
Date: Sun, 15 Mar 2020 21:25:54 +0100
Subject: [PATCH] gnu: Add blktrace.

* gnu/packages/linux.scm (blktrace): New variable.
* gnu/packages/patches/blktrace-use-rmtree.patch: Add file.
* gnu/local.mk (dist_patch_DATA): Add it.
---
 gnu/local.mk                                  |  2 +
 gnu/packages/linux.scm                        | 41 +++++++++++++++++++
 .../patches/blktrace-use-rmtree.patch         | 32 +++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 gnu/packages/patches/blktrace-use-rmtree.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index ca3f2664aa..28731ecc46 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -27,6 +27,7 @@
 # Copyright © 2019 Brett Gilio <address@hidden>
 # Copyright © 2019 Amin Bandali <address@hidden>
 # Copyright © 2020 Brendan Tildesley <address@hidden>
+# Copyright © 2020 Vincent Legoll <address@hidden>
 #
 # This file is part of GNU Guix.
 #
@@ -766,6 +767,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/binutils-loongson-workaround.patch	\
   %D%/packages/patches/blender-2.79-newer-ffmpeg.patch		\
   %D%/packages/patches/blender-2.79-python-3.7-fix.patch	\
+  %D%/packages/patches/blktrace-use-rmtree.patch		\
   %D%/packages/patches/bluez-CVE-2020-0556.patch		\
   %D%/packages/patches/byobu-writable-status.patch		\
   %D%/packages/patches/calibre-no-updates-dialog.patch		\
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 0e649d0fe3..719ed7cad9 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -4012,6 +4012,47 @@ system calls, important for the performance of databases and other advanced
 applications.")
     (license license:lgpl2.1+)))
 
+(define-public blktrace
+  (let ((commit "f4f8ef7cdea138cfaa2f3ca0ee31fa23d3bcf1cc")
+        (revision "0"))
+    (package
+      (name "blktrace")
+      (version (git-version "1.2.0" revision commit))
+      (home-page
+        "https://git.kernel.org/pub/scm/linux/kernel/git/axboe/blktrace.git")
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url home-page)
+                      (commit commit)))
+                (sha256
+                 (base32 "1ihdfimg7mfcgdm6l09xfqx5kdyv42x743dxp3z3w65q5vd7xy89"))
+                (file-name (git-file-name name version))
+                (patches (search-patches "blktrace-use-rmtree.patch"))))
+      (build-system gnu-build-system)
+      (arguments
+       '(#:make-flags
+         (list "CC=gcc" (string-append "prefix=" %output))
+         #:tests? #f ; no tests
+         #:phases
+         (modify-phases %standard-phases
+           (delete 'configure) ; no configure script
+           (add-after 'unpack 'fix-gnuplot-path
+             (lambda* (#:key inputs #:allow-other-keys)
+               (let ((gnuplot (assoc-ref inputs "gnuplot")))
+                 (substitute* "btt/bno_plot.py"
+                   (("gnuplot %s")
+                    (string-append gnuplot "/bin/gnuplot %s")))))))))
+      (inputs
+       `(("libaio" ,libaio)
+         ("gnuplot" ,gnuplot)
+         ("python" ,python-wrapper)))             ;for 'bno_plot.py'
+      (synopsis "Block layer IO tracing mechanism")
+      (description "Blktrace is a block layer IO tracing mechanism which provides
+detailed information about request queue operations to user space.  It extracts
+event traces from the kernel (via the relaying through the debug file system).")
+      (license license:gpl2))))
+
 (define-public sbc
   (package
     (name "sbc")
diff --git a/gnu/packages/patches/blktrace-use-rmtree.patch b/gnu/packages/patches/blktrace-use-rmtree.patch
new file mode 100644
index 0000000000..bb0a10da72
--- /dev/null
+++ b/gnu/packages/patches/blktrace-use-rmtree.patch
@@ -0,0 +1,32 @@
+From 6d1ce4a3a1a561644695a50c00cbd28494728061 Mon Sep 17 00:00:00 2001
+From: Vincent Legoll <address@hidden>
+Date: Mon, 16 Mar 2020 11:43:19 +0100
+Subject: [PATCH 02/10] bno_plot.py: Use shutil.rmtree() instead of
+ os.system('/bin/rm')
+
+---
+ btt/bno_plot.py | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/btt/bno_plot.py b/btt/bno_plot.py
+index f05cfdc..36fc524 100644
+--- a/btt/bno_plot.py
++++ b/btt/bno_plot.py
+@@ -40,7 +40,7 @@ To exit the plotter, enter 'quit' or ^D at the 'gnuplot> ' prompt.
+ 
+ from __future__ import absolute_import
+ from __future__ import print_function
+-import getopt, glob, os, sys, tempfile
++import getopt, glob, os, sys, tempfile, shutil
+ 
+ verbose	= 0
+ cmds	= """
+@@ -125,4 +125,4 @@ if __name__ == '__main__':
+ 		sys.exit(1)
+ 
+ 	os.waitpid(pid, 0)
+-	os.system('/bin/rm -rf ' + tmpdir)
++	shutil.rmtree(tmpdir)
+-- 
+2.20.1
+
-- 
2.25.1