[PATCH 14/19] lttng: Add documentation and license files

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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
---
 drivers/staging/lttng/ChangeLog    |   75 ++++++
 drivers/staging/lttng/LICENSE      |   27 ++
 drivers/staging/lttng/README       |   46 ++++
 drivers/staging/lttng/gpl-2.0.txt  |  339 ++++++++++++++++++++++++
 drivers/staging/lttng/lgpl-2.1.txt |  504 ++++++++++++++++++++++++++++++++++++
 5 files changed, 991 insertions(+), 0 deletions(-)
 create mode 100644 drivers/staging/lttng/ChangeLog
 create mode 100644 drivers/staging/lttng/LICENSE
 create mode 100644 drivers/staging/lttng/README
 create mode 100644 drivers/staging/lttng/gpl-2.0.txt
 create mode 100644 drivers/staging/lttng/lgpl-2.1.txt

diff --git a/drivers/staging/lttng/ChangeLog b/drivers/staging/lttng/ChangeLog
new file mode 100644
index 0000000..982d391
--- /dev/null
+++ b/drivers/staging/lttng/ChangeLog
@@ -0,0 +1,75 @@
+2011-09-30 LTTng modules 2.0-pre10
+	* x86-32: override sys_mmap syscall instrumentation
+	* Fix cast warning
+
+2011-09-29 LTTng modules 2.0-pre9
+	* x86 32 syscalls: fix !CONFIG_UID16
+	* Use __string_from_user
+	* Add __string_from_user
+	* Rename "comm" context to "procname"
+	* Fetch "type" name field for mount syscall
+	* Create common override file for all architectures
+	* Shrink stack size usage
+	* Cleanup: remove unused lttng-compat-syscalls.c file
+	* Support detailed compat syscalls on x86_64
+	* Fix syscall table
+	* Add disabled compat syscalls detail (work in progress)
+	* Add config compat support for detailed x86_32 syscalls
+	* Handle newer 3.1+ perf API
+	* Add dummy x86-32 override headers
+	* Bind x86-32 syscall headers
+	* Add x86-32 syscall headers
+	* Add check for KALLSYMS_ALL in syscall extraction script
+	* Automate string extraction for syscalls
+	* Automate syscall filename/pathname extraction
+	* Add exit to ring_buffer_frontend so module is unloadable
+	* Add sys_open filename (x86_64)
+	* Add missing memcpy callback
+	* copy_from_user and memset
+	* Add missing alignment after header write
+	* lib ring buffer: add frontend init as module_init
+	* lib ring buffer frontend: add missing lock initialization
+	* ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address (missing file)
+	* ARM: Set bit 0 for thumb mode in kallsyms_lookup_name returned address
+	* Create override for sys_mmap
+	* Rename syscalls -> syscall in LTTng ABI
+	* Use different event name for compat syscalls
+	* Allow trace syscall table override
+	* Add dummy override files
+	* syscall detail: add override capability
+	* Add pointer pretty-print heuristics
+	* Add __field_hex
+	* Rename sys exit errno into ret
+	* Enable detailed syscalls only for native x86_64
+	* Use "unknown" for compat syscalls
+	* Disable x86-64 specific detailed syscalls for now, until we deal with 32-bit compat
+	* Fix syscall exit
+	* Fix sys exit
+	* Only enable detailed syscalls for x86_64 for now
+	* Merge unknown syscall method with extended detail method
+	* Add underscore prefix before event names
+	* Add syscalls pointers detailed syscall tracing
+	* Use perl for regexp
+	* Support generation of syscall probes for those with pointers
+	* Support detailed syscalls with 0 arguments
+	* detailed syscall tracing (work in progress)
+	* Expose /proc/lttng file
+	* Implement detailed syscall event probe
+	* Disable perf build for < 2.6.33 kernels
+	* Syscall detail mode: generate syscall table
+	* block instrumentation: write cmd as hex sequence
+	* lttng-events TRACE_EVENT generator cleanup
+	* block layer instrumentation: fix cmd field
+	* Remove 0 args syscalls for now from type-aware syscall cb generator
+	* Generate trace syscall table macros
+	* Put syscall tracing without arg types back in place
+	* Detailed system call tracing (TRACE_EVENT() generation for integer support)
+	* lttng events probes: don't clash with "ctx" variable name
+	* lib ring buffer must take private pointer copy before decrementing refcount
+
+2011-08-16 LTTng modules 2.0-pre8
+	* Fix metadata buffer wait/wakeup
+
+2011-08-12 LTTng modules 2.0-pre7
+	* Add missing module refcount to lttng_tracepoint_list_fops
+	* Add license info about lib/ringbuffer/ring_buffer_mmap.c being GPLv2
diff --git a/drivers/staging/lttng/LICENSE b/drivers/staging/lttng/LICENSE
new file mode 100644
index 0000000..bb880bf
--- /dev/null
+++ b/drivers/staging/lttng/LICENSE
@@ -0,0 +1,27 @@
+LTTng modules licensing
+Mathieu Desnoyers
+June 2, 2011
+
+* LGPLv2.1/GPLv2 dual-license
+
+The files contained within this package are licensed under
+LGPLv2.1/GPLv2 dual-license (see lgpl-2.1.txt and gpl-2.0.txt for
+details), except for files identified by the following sections.
+
+* GPLv2 license
+
+These files are licensed exclusively under the GPLv2 license. See
+gpl-2.0.txt for details.
+
+lib/ringbuffer/ring_buffer_splice.c
+lib/ringbuffer/ring_buffer_mmap.c
+instrumentation/events/mainline/*.h
+instrumentation/events/lttng-modules/*.h
+
+* MIT-style license
+
+These files are licensed under an MIT-style license:
+
+lib/prio_heap/lttng_prio_heap.h
+lib/prio_heap/lttng_prio_heap.c
+lib/bitfield.h
diff --git a/drivers/staging/lttng/README b/drivers/staging/lttng/README
new file mode 100644
index 0000000..90cf200
--- /dev/null
+++ b/drivers/staging/lttng/README
@@ -0,0 +1,46 @@
+LTTng 2.0 modules
+
+Mathieu Desnoyers
+November 1st, 2011
+
+LTTng 2.0 kernel modules is currently part of the Linux kernel staging
+tree. It features (new features since LTTng 0.x):
+
+- Produces CTF (Common Trace Format) natively,
+  (http://www.efficios.com/ctf)
+- Tracepoints, Function tracer, CPU Performance Monitoring Unit (PMU)
+  counters, kprobes, and kretprobes support,
+- Integrated interface for both kernel and userspace tracing,
+- Have the ability to attach "context" information to events in the
+  trace (e.g. any PMU counter, pid, ppid, tid, comm name, etc).
+  All the extra information fields to be collected with events are
+  optional, specified on a per-tracing-session basis (except for
+  timestamp and event id, which are mandatory).
+
+To build and install, you need to select "Staging" modules, and the
+LTTng kernel tracer.
+
+Use lttng-tools to control the tracer. LTTng tools should automatically load
+the kernel modules when needed. Use Babeltrace to print traces as a
+human-readable text log. These tools are available at the following URL:
+http://lttng.org/lttng2.0
+
+Please note that the LTTng-UST 2.0 (user-space tracing counterpart of LTTng 2.0)
+is still in active development and not released yet.
+
+So far, it has been tested on vanilla Linux kernels 2.6.38, 2.6.39 and 3.0 (on
+x86 32/64-bit, and powerpc 32-bit at the moment, build tested on ARM). It should
+work fine with newer kernels and other architectures, but expect build issues
+with kernels older than 2.6.36. The clock source currently used is the standard
+gettimeofday (slower, less scalable and less precise than the LTTng 0.x clocks).
+Support for LTTng 0.x clocks will be added back soon into LTTng 2.0.  Please
+note that lttng-modules 2.0 can build on a Linux kernel patched with the LTTng
+0.x patchset, but the lttng-modules 2.0 replace the lttng-modules 0.x, so both
+tracers cannot be installed at the same time for a given kernel version.
+
+* Note about Perf PMU counters support
+
+Each PMU counter has its zero value set when it is attached to a context with
+add-context. Therefore, it is normal that the same counters attached to both the
+stream context and event context show different values for a given event; what
+matters is that they increment at the same rate.
diff --git a/drivers/staging/lttng/gpl-2.0.txt b/drivers/staging/lttng/gpl-2.0.txt
new file mode 100644
index 0000000..d511905
--- /dev/null
+++ b/drivers/staging/lttng/gpl-2.0.txt
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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diff --git a/drivers/staging/lttng/lgpl-2.1.txt b/drivers/staging/lttng/lgpl-2.1.txt
new file mode 100644
index 0000000..602bfc9
--- /dev/null
+++ b/drivers/staging/lttng/lgpl-2.1.txt
@@ -0,0 +1,504 @@
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
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+free software--to make sure the software is free for all its users.
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-- 
1.7.2.5

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