lttng-abi: Document ioctl numbers reserved by lttng-abi-old.h

Document the ioctl numbers reserved by lttng-abi-old.h in the
(relatively) new lttng-abi.h, so they are taken into account when
assining numbers to new lttng ioctl commands.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/lttng-abi.h b/lttng-abi.h
index f61a6a15cdbd3195e4cc5b850696fef0b8908b64..9d345f4a7c841fe683e5872ee2eb6eeb958a176d 100644 (file)
--- a/lttng-abi.h
+++ b/lttng-abi.h
@@ -209,6 +209,7 @@ struct lttng_kernel_filter_bytecode {
 } __attribute__((packed));
 
 /* LTTng file descriptor ioctl */
+/* lttng-abi-old.h reserve 0x40, 0x41, 0x42, 0x43, and 0x44. */
 #define LTTNG_KERNEL_SESSION                   _IO(0xF6, 0x45)
 #define LTTNG_KERNEL_TRACER_VERSION            \
        _IOR(0xF6, 0x46, struct lttng_kernel_tracer_version)
@@ -221,6 +222,7 @@ struct lttng_kernel_filter_bytecode {
        _IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version)
 
 /* Session FD ioctl */
+/* lttng-abi-old.h reserve 0x50, 0x51, 0x52, and 0x53. */
 #define LTTNG_KERNEL_METADATA                  \
        _IOW(0xF6, 0x54, struct lttng_kernel_channel)
 #define LTTNG_KERNEL_CHANNEL                   \
@@ -239,7 +241,7 @@ struct lttng_kernel_filter_bytecode {
 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS _IO(0xF6, 0x58)
 #define LTTNG_KERNEL_SESSION_METADATA_REGEN    _IO(0xF6, 0x59)
 
-/* 0x5A and 0x5B are reserved for a future ABI-breaking cleanup. */
+/* lttng-abi-old.h reserve 0x5A and 0x5B. */
 #define LTTNG_KERNEL_SESSION_STATEDUMP         _IO(0xF6, 0x5C)
 #define LTTNG_KERNEL_SESSION_SET_NAME          \
        _IOR(0xF6, 0x5D, struct lttng_kernel_session_name)
@@ -247,6 +249,7 @@ struct lttng_kernel_filter_bytecode {
        _IOR(0xF6, 0x5E, struct lttng_kernel_session_creation_time)
 
 /* Channel FD ioctl */
+/* lttng-abi-old.h reserve 0x60 and 0x61. */
 #define LTTNG_KERNEL_STREAM                    _IO(0xF6, 0x62)
 #define LTTNG_KERNEL_EVENT                     \
        _IOW(0xF6, 0x63, struct lttng_kernel_event)
@@ -254,10 +257,12 @@ struct lttng_kernel_filter_bytecode {
        _IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask)
 
 /* Event and Channel FD ioctl */
+/* lttng-abi-old.h reserve 0x70. */
 #define LTTNG_KERNEL_CONTEXT                   \
        _IOW(0xF6, 0x71, struct lttng_kernel_context)
 
 /* Event, Channel and Session ioctl */
+/* lttng-abi-old.h reserve 0x80 and 0x81. */
 #define LTTNG_KERNEL_ENABLE                    _IO(0xF6, 0x82)
 #define LTTNG_KERNEL_DISABLE                   _IO(0xF6, 0x83)