| 1 | /* |
| 2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> |
| 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; only version 2 |
| 8 | * of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <sys/ioctl.h> |
| 21 | |
| 22 | #include "kernel-ioctl.h" |
| 23 | #include "kernelctl.h" |
| 24 | |
| 25 | int kernctl_create_session(int fd) |
| 26 | { |
| 27 | return ioctl(fd, LTTNG_KERNEL_SESSION); |
| 28 | } |
| 29 | |
| 30 | /* open the metadata global channel */ |
| 31 | int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) |
| 32 | { |
| 33 | return ioctl(fd, LTTNG_KERNEL_METADATA, chops); |
| 34 | } |
| 35 | |
| 36 | int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) |
| 37 | { |
| 38 | return ioctl(fd, LTTNG_KERNEL_CHANNEL, chops); |
| 39 | } |
| 40 | |
| 41 | int kernctl_create_stream(int fd) |
| 42 | { |
| 43 | return ioctl(fd, LTTNG_KERNEL_STREAM); |
| 44 | } |
| 45 | |
| 46 | int kernctl_create_event(int fd, struct lttng_kernel_event *ev) |
| 47 | { |
| 48 | return ioctl(fd, LTTNG_KERNEL_EVENT, ev); |
| 49 | } |
| 50 | |
| 51 | int kernctl_add_context(int fd, struct lttng_kernel_context *ctx) |
| 52 | { |
| 53 | return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx); |
| 54 | } |
| 55 | |
| 56 | |
| 57 | /* Enable event, channel and session ioctl */ |
| 58 | int kernctl_enable(int fd) |
| 59 | { |
| 60 | return ioctl(fd, LTTNG_KERNEL_ENABLE); |
| 61 | } |
| 62 | |
| 63 | /* Disable event, channel and session ioctl */ |
| 64 | int kernctl_disable(int fd) |
| 65 | { |
| 66 | return ioctl(fd, LTTNG_KERNEL_DISABLE); |
| 67 | } |
| 68 | |
| 69 | int kernctl_start_session(int fd) |
| 70 | { |
| 71 | return ioctl(fd, LTTNG_KERNEL_SESSION_START); |
| 72 | } |
| 73 | |
| 74 | int kernctl_stop_session(int fd) |
| 75 | { |
| 76 | return ioctl(fd, LTTNG_KERNEL_SESSION_STOP); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | int kernctl_tracepoint_list(int fd) |
| 81 | { |
| 82 | return ioctl(fd, LTTNG_KERNEL_TRACEPOINT_LIST); |
| 83 | } |
| 84 | |
| 85 | int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v) |
| 86 | { |
| 87 | return ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v); |
| 88 | } |
| 89 | |
| 90 | int kernctl_wait_quiescent(int fd) |
| 91 | { |
| 92 | return ioctl(fd, LTTNG_KERNEL_WAIT_QUIESCENT); |
| 93 | } |
| 94 | |
| 95 | int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) |
| 96 | { |
| 97 | return ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | int kernctl_buffer_flush(int fd) |
| 102 | { |
| 103 | return ioctl(fd, RING_BUFFER_FLUSH); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | /* Buffer operations */ |
| 108 | |
| 109 | /* For mmap mode, readable without "get" operation */ |
| 110 | |
| 111 | /* returns the length to mmap. */ |
| 112 | int kernctl_get_mmap_len(int fd, unsigned long *len) |
| 113 | { |
| 114 | return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len); |
| 115 | } |
| 116 | |
| 117 | /* returns the maximum size for sub-buffers. */ |
| 118 | int kernctl_get_max_subbuf_size(int fd, unsigned long *len) |
| 119 | { |
| 120 | return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len); |
| 121 | } |
| 122 | |
| 123 | /* |
| 124 | * For mmap mode, operate on the current packet (between get/put or |
| 125 | * get_next/put_next). |
| 126 | */ |
| 127 | |
| 128 | /* returns the offset of the subbuffer belonging to the mmap reader. */ |
| 129 | int kernctl_get_mmap_read_offset(int fd, unsigned long *off) |
| 130 | { |
| 131 | return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off); |
| 132 | } |
| 133 | |
| 134 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 135 | int kernctl_get_subbuf_size(int fd, unsigned long *len) |
| 136 | { |
| 137 | return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len); |
| 138 | } |
| 139 | |
| 140 | /* returns the size of the current sub-buffer, without padding (for mmap). */ |
| 141 | int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) |
| 142 | { |
| 143 | return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len); |
| 144 | } |
| 145 | |
| 146 | /* Get exclusive read access to the next sub-buffer that can be read. */ |
| 147 | int kernctl_get_next_subbuf(int fd) |
| 148 | { |
| 149 | return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /* Release exclusive sub-buffer access, move consumer forward. */ |
| 154 | int kernctl_put_next_subbuf(int fd) |
| 155 | { |
| 156 | return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF); |
| 157 | } |
| 158 | |
| 159 | /* snapshot */ |
| 160 | |
| 161 | /* Get a snapshot of the current ring buffer producer and consumer positions */ |
| 162 | int kernctl_snapshot(int fd) |
| 163 | { |
| 164 | return ioctl(fd, RING_BUFFER_SNAPSHOT); |
| 165 | } |
| 166 | |
| 167 | /* Get the consumer position (iteration start) */ |
| 168 | int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) |
| 169 | { |
| 170 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos); |
| 171 | } |
| 172 | |
| 173 | /* Get the producer position (iteration end) */ |
| 174 | int kernctl_snapshot_get_produced(int fd, unsigned long *pos) |
| 175 | { |
| 176 | return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos); |
| 177 | } |
| 178 | |
| 179 | /* Get exclusive read access to the specified sub-buffer position */ |
| 180 | int kernctl_get_subbuf(int fd, unsigned long *len) |
| 181 | { |
| 182 | return ioctl(fd, RING_BUFFER_GET_SUBBUF, len); |
| 183 | } |
| 184 | |
| 185 | /* Release exclusive sub-buffer access */ |
| 186 | int kernctl_put_subbuf(int fd) |
| 187 | { |
| 188 | return ioctl(fd, RING_BUFFER_PUT_SUBBUF); |
| 189 | } |