Commit | Line | Data |
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b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
9f36eaed | 2 | * |
e8951e63 | 3 | * lttng-abi.c |
baf20995 | 4 | * |
e8951e63 | 5 | * LTTng ABI |
baf20995 | 6 | * |
886d51a3 MD |
7 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8 | * | |
baf20995 MD |
9 | * Mimic system calls for: |
10 | * - session creation, returns a file descriptor or failure. | |
ad1c05e1 MD |
11 | * - channel creation, returns a file descriptor or failure. |
12 | * - Operates on a session file descriptor | |
13 | * - Takes all channel options as parameters. | |
14 | * - stream get, returns a file descriptor or failure. | |
15 | * - Operates on a channel file descriptor. | |
16 | * - stream notifier get, returns a file descriptor or failure. | |
17 | * - Operates on a channel file descriptor. | |
18 | * - event creation, returns a file descriptor or failure. | |
19 | * - Operates on a channel file descriptor | |
20 | * - Takes an event name as parameter | |
21 | * - Takes an instrumentation source as parameter | |
22 | * - e.g. tracepoints, dynamic_probes... | |
23 | * - Takes instrumentation source specific arguments. | |
baf20995 MD |
24 | */ |
25 | ||
a27c8df7 | 26 | #include <asm/barrier.h> |
11b5a3c2 | 27 | #include <linux/module.h> |
e6a17f26 | 28 | #include <linux/proc_fs.h> |
11b5a3c2 MD |
29 | #include <linux/anon_inodes.h> |
30 | #include <linux/file.h> | |
31 | #include <linux/uaccess.h> | |
32 | #include <linux/slab.h> | |
abc0446a | 33 | #include <linux/err.h> |
263b6c88 | 34 | #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */ |
24591303 MD |
35 | #include <ringbuffer/vfs.h> |
36 | #include <ringbuffer/backend.h> | |
37 | #include <ringbuffer/frontend.h> | |
c190d76e | 38 | #include <wrapper/compiler_attributes.h> |
241ae9a8 | 39 | #include <wrapper/poll.h> |
241ae9a8 | 40 | #include <wrapper/kref.h> |
6ef1e2f5 | 41 | #include <wrapper/uaccess.h> |
2df37e95 MD |
42 | #include <lttng/string-utils.h> |
43 | #include <lttng/abi.h> | |
44 | #include <lttng/abi-old.h> | |
45 | #include <lttng/events.h> | |
92bc1e23 | 46 | #include <lttng/events-internal.h> |
2df37e95 MD |
47 | #include <lttng/tracer.h> |
48 | #include <lttng/tp-mempool.h> | |
24591303 | 49 | #include <ringbuffer/frontend_types.h> |
db2511b4 | 50 | #include <ringbuffer/iterator.h> |
baf20995 MD |
51 | |
52 | /* | |
53 | * This is LTTng's own personal way to create a system call as an external | |
80996790 | 54 | * module. We use ioctl() on /proc/lttng. |
baf20995 MD |
55 | */ |
56 | ||
e6a17f26 | 57 | static struct proc_dir_entry *lttng_proc_dentry; |
059de147 | 58 | |
5f4c791e | 59 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
059de147 MJ |
60 | static const struct proc_ops lttng_proc_ops; |
61 | #else | |
62 | static const struct file_operations lttng_proc_ops; | |
63 | #endif | |
64 | ||
ad1c05e1 | 65 | static const struct file_operations lttng_session_fops; |
750b05f2 | 66 | static const struct file_operations lttng_event_notifier_group_fops; |
ad1c05e1 | 67 | static const struct file_operations lttng_channel_fops; |
5dbbdb43 | 68 | static const struct file_operations lttng_metadata_fops; |
1437a010 MD |
69 | static const struct file_operations lttng_event_session_fops; |
70 | static const struct file_operations lttng_event_session_enabler_fops; | |
ed8d02d6 | 71 | static struct file_operations lttng_stream_ring_buffer_file_operations; |
baf20995 | 72 | |
9616f0bf | 73 | static int put_u64(uint64_t val, unsigned long arg); |
8b97fd42 | 74 | static int put_u32(uint32_t val, unsigned long arg); |
9616f0bf | 75 | |
6ef1e2f5 MD |
76 | static |
77 | int lttng_abi_create_event_counter_enabler(struct file *channel_file, | |
7b0f1e69 | 78 | struct lttng_kernel_counter_event *counter_event); |
2ff86ce2 MD |
79 | static |
80 | long lttng_abi_session_create_counter( | |
81 | struct lttng_kernel_session *session, | |
81ab5b77 | 82 | const struct lttng_kernel_counter_conf *counter_conf); |
6ef1e2f5 | 83 | |
99f52fcc FD |
84 | static int validate_zeroed_padding(char *p, size_t len) |
85 | { | |
86 | size_t i; | |
87 | ||
88 | for (i = 0; i < len; i++) { | |
89 | if (p[i]) | |
90 | return -1; | |
91 | } | |
92 | return 0; | |
93 | } | |
94 | ||
a33c9927 MD |
95 | /* |
96 | * Teardown management: opened file descriptors keep a refcount on the module, | |
97 | * so it can only exit when all file descriptors are closed. | |
98 | */ | |
99 | ||
ad1c05e1 | 100 | static |
baf20995 MD |
101 | int lttng_abi_create_session(void) |
102 | { | |
8cdc1a81 | 103 | struct lttng_kernel_session *session; |
c0e31d2e | 104 | struct file *session_file; |
11b5a3c2 | 105 | int session_fd, ret; |
baf20995 | 106 | |
a90917c3 | 107 | session = lttng_session_create(); |
baf20995 MD |
108 | if (!session) |
109 | return -ENOMEM; | |
2a059b14 | 110 | session_fd = get_unused_fd_flags(0); |
baf20995 MD |
111 | if (session_fd < 0) { |
112 | ret = session_fd; | |
113 | goto fd_error; | |
114 | } | |
c0e31d2e | 115 | session_file = anon_inode_getfile("[lttng_session]", |
ad1c05e1 | 116 | <tng_session_fops, |
baf20995 | 117 | session, O_RDWR); |
c0e31d2e MD |
118 | if (IS_ERR(session_file)) { |
119 | ret = PTR_ERR(session_file); | |
baf20995 MD |
120 | goto file_error; |
121 | } | |
8cdc1a81 | 122 | session->priv->file = session_file; |
c0e31d2e | 123 | fd_install(session_fd, session_file); |
baf20995 MD |
124 | return session_fd; |
125 | ||
126 | file_error: | |
127 | put_unused_fd(session_fd); | |
128 | fd_error: | |
a90917c3 | 129 | lttng_session_destroy(session); |
baf20995 MD |
130 | return ret; |
131 | } | |
132 | ||
56386a64 | 133 | static |
21f58fb7 FD |
134 | void event_notifier_send_notification_work_wakeup(struct irq_work *entry) |
135 | { | |
136 | struct lttng_event_notifier_group *event_notifier_group = | |
137 | container_of(entry, struct lttng_event_notifier_group, | |
138 | wakeup_pending); | |
139 | wake_up_interruptible(&event_notifier_group->read_wait); | |
140 | } | |
141 | ||
750b05f2 FD |
142 | static |
143 | int lttng_abi_create_event_notifier_group(void) | |
144 | { | |
145 | struct lttng_event_notifier_group *event_notifier_group; | |
146 | struct file *event_notifier_group_file; | |
147 | int event_notifier_group_fd, ret; | |
148 | ||
149 | event_notifier_group = lttng_event_notifier_group_create(); | |
150 | if (!event_notifier_group) | |
151 | return -ENOMEM; | |
152 | ||
2a059b14 | 153 | event_notifier_group_fd = get_unused_fd_flags(0); |
750b05f2 FD |
154 | if (event_notifier_group_fd < 0) { |
155 | ret = event_notifier_group_fd; | |
156 | goto fd_error; | |
157 | } | |
158 | event_notifier_group_file = anon_inode_getfile("[lttng_event_notifier_group]", | |
159 | <tng_event_notifier_group_fops, | |
160 | event_notifier_group, O_RDWR); | |
161 | if (IS_ERR(event_notifier_group_file)) { | |
162 | ret = PTR_ERR(event_notifier_group_file); | |
163 | goto file_error; | |
164 | } | |
165 | ||
166 | event_notifier_group->file = event_notifier_group_file; | |
21f58fb7 FD |
167 | init_waitqueue_head(&event_notifier_group->read_wait); |
168 | init_irq_work(&event_notifier_group->wakeup_pending, | |
169 | event_notifier_send_notification_work_wakeup); | |
750b05f2 FD |
170 | fd_install(event_notifier_group_fd, event_notifier_group_file); |
171 | return event_notifier_group_fd; | |
172 | ||
173 | file_error: | |
174 | put_unused_fd(event_notifier_group_fd); | |
175 | fd_error: | |
176 | lttng_event_notifier_group_destroy(event_notifier_group); | |
177 | return ret; | |
178 | } | |
179 | ||
271b6681 MD |
180 | static |
181 | int lttng_abi_tracepoint_list(void) | |
182 | { | |
183 | struct file *tracepoint_list_file; | |
184 | int file_fd, ret; | |
185 | ||
2a059b14 | 186 | file_fd = get_unused_fd_flags(0); |
271b6681 MD |
187 | if (file_fd < 0) { |
188 | ret = file_fd; | |
189 | goto fd_error; | |
190 | } | |
30f18bf0 | 191 | |
8ee099b6 | 192 | tracepoint_list_file = anon_inode_getfile("[lttng_tracepoint_list]", |
271b6681 MD |
193 | <tng_tracepoint_list_fops, |
194 | NULL, O_RDWR); | |
195 | if (IS_ERR(tracepoint_list_file)) { | |
196 | ret = PTR_ERR(tracepoint_list_file); | |
197 | goto file_error; | |
198 | } | |
30f18bf0 MD |
199 | ret = lttng_tracepoint_list_fops.open(NULL, tracepoint_list_file); |
200 | if (ret < 0) | |
201 | goto open_error; | |
271b6681 MD |
202 | fd_install(file_fd, tracepoint_list_file); |
203 | return file_fd; | |
204 | ||
30f18bf0 MD |
205 | open_error: |
206 | fput(tracepoint_list_file); | |
271b6681 MD |
207 | file_error: |
208 | put_unused_fd(file_fd); | |
209 | fd_error: | |
210 | return ret; | |
211 | } | |
212 | ||
f127e61e MD |
213 | #ifndef CONFIG_HAVE_SYSCALL_TRACEPOINTS |
214 | static inline | |
215 | int lttng_abi_syscall_list(void) | |
216 | { | |
217 | return -ENOSYS; | |
218 | } | |
219 | #else | |
220 | static | |
221 | int lttng_abi_syscall_list(void) | |
222 | { | |
223 | struct file *syscall_list_file; | |
224 | int file_fd, ret; | |
225 | ||
2a059b14 | 226 | file_fd = get_unused_fd_flags(0); |
f127e61e MD |
227 | if (file_fd < 0) { |
228 | ret = file_fd; | |
229 | goto fd_error; | |
230 | } | |
231 | ||
232 | syscall_list_file = anon_inode_getfile("[lttng_syscall_list]", | |
233 | <tng_syscall_list_fops, | |
234 | NULL, O_RDWR); | |
235 | if (IS_ERR(syscall_list_file)) { | |
236 | ret = PTR_ERR(syscall_list_file); | |
237 | goto file_error; | |
238 | } | |
239 | ret = lttng_syscall_list_fops.open(NULL, syscall_list_file); | |
240 | if (ret < 0) | |
241 | goto open_error; | |
242 | fd_install(file_fd, syscall_list_file); | |
f127e61e MD |
243 | return file_fd; |
244 | ||
245 | open_error: | |
246 | fput(syscall_list_file); | |
247 | file_error: | |
248 | put_unused_fd(file_fd); | |
249 | fd_error: | |
250 | return ret; | |
251 | } | |
252 | #endif | |
253 | ||
80c16bcf | 254 | static |
606828e4 | 255 | void lttng_abi_tracer_version(struct lttng_kernel_abi_tracer_version *v) |
80c16bcf | 256 | { |
6dccd6c1 JD |
257 | v->major = LTTNG_MODULES_MAJOR_VERSION; |
258 | v->minor = LTTNG_MODULES_MINOR_VERSION; | |
259 | v->patchlevel = LTTNG_MODULES_PATCHLEVEL_VERSION; | |
80c16bcf MD |
260 | } |
261 | ||
42cabb80 | 262 | static |
606828e4 | 263 | void lttng_abi_tracer_abi_version(struct lttng_kernel_abi_tracer_abi_version *v) |
42cabb80 | 264 | { |
606828e4 MD |
265 | v->major = LTTNG_KERNEL_ABI_MAJOR_VERSION; |
266 | v->minor = LTTNG_KERNEL_ABI_MINOR_VERSION; | |
42cabb80 MD |
267 | } |
268 | ||
8070f5c0 MD |
269 | static |
270 | long lttng_abi_add_context(struct file *file, | |
606828e4 | 271 | struct lttng_kernel_abi_context *context_param, |
8cdc1a81 | 272 | struct lttng_kernel_ctx **ctx, struct lttng_kernel_session *session) |
8070f5c0 | 273 | { |
8070f5c0 | 274 | |
8cdc1a81 | 275 | if (session->priv->been_active) |
8070f5c0 MD |
276 | return -EPERM; |
277 | ||
6dccd6c1 | 278 | switch (context_param->ctx) { |
606828e4 | 279 | case LTTNG_KERNEL_ABI_CONTEXT_PID: |
8070f5c0 | 280 | return lttng_add_pid_to_ctx(ctx); |
606828e4 | 281 | case LTTNG_KERNEL_ABI_CONTEXT_PRIO: |
a8ad3613 | 282 | return lttng_add_prio_to_ctx(ctx); |
606828e4 | 283 | case LTTNG_KERNEL_ABI_CONTEXT_NICE: |
53f1f0ca | 284 | return lttng_add_nice_to_ctx(ctx); |
606828e4 | 285 | case LTTNG_KERNEL_ABI_CONTEXT_VPID: |
b64bc438 | 286 | return lttng_add_vpid_to_ctx(ctx); |
606828e4 | 287 | case LTTNG_KERNEL_ABI_CONTEXT_TID: |
b64bc438 | 288 | return lttng_add_tid_to_ctx(ctx); |
606828e4 | 289 | case LTTNG_KERNEL_ABI_CONTEXT_VTID: |
b64bc438 | 290 | return lttng_add_vtid_to_ctx(ctx); |
606828e4 | 291 | case LTTNG_KERNEL_ABI_CONTEXT_PPID: |
b64bc438 | 292 | return lttng_add_ppid_to_ctx(ctx); |
606828e4 | 293 | case LTTNG_KERNEL_ABI_CONTEXT_VPPID: |
b64bc438 | 294 | return lttng_add_vppid_to_ctx(ctx); |
606828e4 MD |
295 | case LTTNG_KERNEL_ABI_CONTEXT_PERF_COUNTER: |
296 | context_param->u.perf_counter.name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
6dccd6c1 JD |
297 | return lttng_add_perf_counter_to_ctx(context_param->u.perf_counter.type, |
298 | context_param->u.perf_counter.config, | |
299 | context_param->u.perf_counter.name, | |
c24a0d71 | 300 | ctx); |
606828e4 | 301 | case LTTNG_KERNEL_ABI_CONTEXT_PROCNAME: |
a2563e83 | 302 | return lttng_add_procname_to_ctx(ctx); |
606828e4 | 303 | case LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME: |
975da2c0 | 304 | return lttng_add_hostname_to_ctx(ctx); |
606828e4 | 305 | case LTTNG_KERNEL_ABI_CONTEXT_CPU_ID: |
b3699d90 | 306 | return lttng_add_cpu_id_to_ctx(ctx); |
606828e4 | 307 | case LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE: |
79150a49 | 308 | return lttng_add_interruptible_to_ctx(ctx); |
606828e4 | 309 | case LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE: |
79150a49 | 310 | return lttng_add_need_reschedule_to_ctx(ctx); |
606828e4 | 311 | case LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE: |
79150a49 | 312 | return lttng_add_preemptible_to_ctx(ctx); |
606828e4 | 313 | case LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE: |
79150a49 | 314 | return lttng_add_migratable_to_ctx(ctx); |
606828e4 MD |
315 | case LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL: |
316 | case LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER: | |
2fa2d39a | 317 | return lttng_add_callstack_to_ctx(ctx, context_param->ctx); |
606828e4 | 318 | case LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS: |
a6cf40a4 | 319 | return lttng_add_cgroup_ns_to_ctx(ctx); |
606828e4 | 320 | case LTTNG_KERNEL_ABI_CONTEXT_IPC_NS: |
a6cf40a4 | 321 | return lttng_add_ipc_ns_to_ctx(ctx); |
606828e4 | 322 | case LTTNG_KERNEL_ABI_CONTEXT_MNT_NS: |
a6cf40a4 | 323 | return lttng_add_mnt_ns_to_ctx(ctx); |
606828e4 | 324 | case LTTNG_KERNEL_ABI_CONTEXT_NET_NS: |
a6cf40a4 | 325 | return lttng_add_net_ns_to_ctx(ctx); |
606828e4 | 326 | case LTTNG_KERNEL_ABI_CONTEXT_PID_NS: |
a6cf40a4 | 327 | return lttng_add_pid_ns_to_ctx(ctx); |
606828e4 | 328 | case LTTNG_KERNEL_ABI_CONTEXT_USER_NS: |
a6cf40a4 | 329 | return lttng_add_user_ns_to_ctx(ctx); |
606828e4 | 330 | case LTTNG_KERNEL_ABI_CONTEXT_UTS_NS: |
a6cf40a4 | 331 | return lttng_add_uts_ns_to_ctx(ctx); |
606828e4 | 332 | case LTTNG_KERNEL_ABI_CONTEXT_UID: |
dc923e75 | 333 | return lttng_add_uid_to_ctx(ctx); |
606828e4 | 334 | case LTTNG_KERNEL_ABI_CONTEXT_EUID: |
dc923e75 | 335 | return lttng_add_euid_to_ctx(ctx); |
606828e4 | 336 | case LTTNG_KERNEL_ABI_CONTEXT_SUID: |
dc923e75 | 337 | return lttng_add_suid_to_ctx(ctx); |
606828e4 | 338 | case LTTNG_KERNEL_ABI_CONTEXT_GID: |
dc923e75 | 339 | return lttng_add_gid_to_ctx(ctx); |
606828e4 | 340 | case LTTNG_KERNEL_ABI_CONTEXT_EGID: |
dc923e75 | 341 | return lttng_add_egid_to_ctx(ctx); |
606828e4 | 342 | case LTTNG_KERNEL_ABI_CONTEXT_SGID: |
dc923e75 | 343 | return lttng_add_sgid_to_ctx(ctx); |
606828e4 | 344 | case LTTNG_KERNEL_ABI_CONTEXT_VUID: |
dc923e75 | 345 | return lttng_add_vuid_to_ctx(ctx); |
606828e4 | 346 | case LTTNG_KERNEL_ABI_CONTEXT_VEUID: |
dc923e75 | 347 | return lttng_add_veuid_to_ctx(ctx); |
606828e4 | 348 | case LTTNG_KERNEL_ABI_CONTEXT_VSUID: |
dc923e75 | 349 | return lttng_add_vsuid_to_ctx(ctx); |
606828e4 | 350 | case LTTNG_KERNEL_ABI_CONTEXT_VGID: |
dc923e75 | 351 | return lttng_add_vgid_to_ctx(ctx); |
606828e4 | 352 | case LTTNG_KERNEL_ABI_CONTEXT_VEGID: |
dc923e75 | 353 | return lttng_add_vegid_to_ctx(ctx); |
606828e4 | 354 | case LTTNG_KERNEL_ABI_CONTEXT_VSGID: |
dc923e75 | 355 | return lttng_add_vsgid_to_ctx(ctx); |
606828e4 | 356 | case LTTNG_KERNEL_ABI_CONTEXT_TIME_NS: |
876e2e92 | 357 | return lttng_add_time_ns_to_ctx(ctx); |
8070f5c0 MD |
358 | default: |
359 | return -EINVAL; | |
360 | } | |
361 | } | |
362 | ||
ad1c05e1 MD |
363 | /** |
364 | * lttng_ioctl - lttng syscall through ioctl | |
365 | * | |
c0e31d2e | 366 | * @file: the file |
ad1c05e1 MD |
367 | * @cmd: the command |
368 | * @arg: command arg | |
369 | * | |
370 | * This ioctl implements lttng commands: | |
606828e4 | 371 | * LTTNG_KERNEL_ABI_SESSION |
ad1c05e1 | 372 | * Returns a LTTng trace session file descriptor |
606828e4 | 373 | * LTTNG_KERNEL_ABI_TRACER_VERSION |
271b6681 | 374 | * Returns the LTTng kernel tracer version |
606828e4 | 375 | * LTTNG_KERNEL_ABI_TRACEPOINT_LIST |
271b6681 | 376 | * Returns a file descriptor listing available tracepoints |
606828e4 | 377 | * LTTNG_KERNEL_ABI_WAIT_QUIESCENT |
360f38ea | 378 | * Returns after all previously running probes have completed |
606828e4 | 379 | * LTTNG_KERNEL_ABI_TRACER_ABI_VERSION |
42cabb80 | 380 | * Returns the LTTng kernel tracer ABI version |
606828e4 | 381 | * LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_CREATE |
750b05f2 | 382 | * Returns a LTTng event notifier group file descriptor |
ad1c05e1 MD |
383 | * |
384 | * The returned session will be deleted when its file descriptor is closed. | |
385 | */ | |
386 | static | |
c0e31d2e | 387 | long lttng_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ad1c05e1 MD |
388 | { |
389 | switch (cmd) { | |
606828e4 MD |
390 | case LTTNG_KERNEL_ABI_OLD_SESSION: |
391 | case LTTNG_KERNEL_ABI_SESSION: | |
ad1c05e1 | 392 | return lttng_abi_create_session(); |
606828e4 | 393 | case LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_CREATE: |
750b05f2 | 394 | return lttng_abi_create_event_notifier_group(); |
606828e4 | 395 | case LTTNG_KERNEL_ABI_OLD_TRACER_VERSION: |
6dccd6c1 | 396 | { |
606828e4 MD |
397 | struct lttng_kernel_abi_tracer_version v; |
398 | struct lttng_kernel_abi_old_tracer_version oldv; | |
399 | struct lttng_kernel_abi_old_tracer_version *uversion = | |
400 | (struct lttng_kernel_abi_old_tracer_version __user *) arg; | |
6dccd6c1 JD |
401 | |
402 | lttng_abi_tracer_version(&v); | |
403 | oldv.major = v.major; | |
404 | oldv.minor = v.minor; | |
405 | oldv.patchlevel = v.patchlevel; | |
406 | ||
407 | if (copy_to_user(uversion, &oldv, sizeof(oldv))) | |
408 | return -EFAULT; | |
409 | return 0; | |
410 | } | |
606828e4 | 411 | case LTTNG_KERNEL_ABI_TRACER_VERSION: |
6dccd6c1 | 412 | { |
606828e4 MD |
413 | struct lttng_kernel_abi_tracer_version version; |
414 | struct lttng_kernel_abi_tracer_version *uversion = | |
415 | (struct lttng_kernel_abi_tracer_version __user *) arg; | |
6dccd6c1 JD |
416 | |
417 | lttng_abi_tracer_version(&version); | |
42cabb80 MD |
418 | |
419 | if (copy_to_user(uversion, &version, sizeof(version))) | |
420 | return -EFAULT; | |
421 | return 0; | |
422 | } | |
606828e4 | 423 | case LTTNG_KERNEL_ABI_TRACER_ABI_VERSION: |
42cabb80 | 424 | { |
606828e4 MD |
425 | struct lttng_kernel_abi_tracer_abi_version version; |
426 | struct lttng_kernel_abi_tracer_abi_version *uversion = | |
427 | (struct lttng_kernel_abi_tracer_abi_version __user *) arg; | |
42cabb80 MD |
428 | |
429 | lttng_abi_tracer_abi_version(&version); | |
430 | ||
6dccd6c1 JD |
431 | if (copy_to_user(uversion, &version, sizeof(version))) |
432 | return -EFAULT; | |
433 | return 0; | |
434 | } | |
606828e4 MD |
435 | case LTTNG_KERNEL_ABI_OLD_TRACEPOINT_LIST: |
436 | case LTTNG_KERNEL_ABI_TRACEPOINT_LIST: | |
271b6681 | 437 | return lttng_abi_tracepoint_list(); |
606828e4 | 438 | case LTTNG_KERNEL_ABI_SYSCALL_LIST: |
2d2464bd | 439 | return lttng_abi_syscall_list(); |
606828e4 MD |
440 | case LTTNG_KERNEL_ABI_OLD_WAIT_QUIESCENT: |
441 | case LTTNG_KERNEL_ABI_WAIT_QUIESCENT: | |
5f7f9078 MD |
442 | synchronize_trace(); |
443 | return 0; | |
606828e4 | 444 | case LTTNG_KERNEL_ABI_OLD_CALIBRATE: |
6dccd6c1 | 445 | { |
606828e4 MD |
446 | struct lttng_kernel_abi_old_calibrate __user *ucalibrate = |
447 | (struct lttng_kernel_abi_old_calibrate __user *) arg; | |
448 | struct lttng_kernel_abi_old_calibrate old_calibrate; | |
449 | struct lttng_kernel_abi_calibrate calibrate; | |
6dccd6c1 JD |
450 | int ret; |
451 | ||
452 | if (copy_from_user(&old_calibrate, ucalibrate, sizeof(old_calibrate))) | |
453 | return -EFAULT; | |
454 | calibrate.type = old_calibrate.type; | |
455 | ret = lttng_calibrate(&calibrate); | |
456 | if (copy_to_user(ucalibrate, &old_calibrate, sizeof(old_calibrate))) | |
457 | return -EFAULT; | |
458 | return ret; | |
459 | } | |
606828e4 | 460 | case LTTNG_KERNEL_ABI_CALIBRATE: |
57105fc2 | 461 | { |
606828e4 MD |
462 | struct lttng_kernel_abi_calibrate __user *ucalibrate = |
463 | (struct lttng_kernel_abi_calibrate __user *) arg; | |
464 | struct lttng_kernel_abi_calibrate calibrate; | |
57105fc2 MD |
465 | int ret; |
466 | ||
467 | if (copy_from_user(&calibrate, ucalibrate, sizeof(calibrate))) | |
468 | return -EFAULT; | |
469 | ret = lttng_calibrate(&calibrate); | |
470 | if (copy_to_user(ucalibrate, &calibrate, sizeof(calibrate))) | |
471 | return -EFAULT; | |
472 | return ret; | |
473 | } | |
ad1c05e1 MD |
474 | default: |
475 | return -ENOIOCTLCMD; | |
476 | } | |
477 | } | |
478 | ||
5f4c791e | 479 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
059de147 MJ |
480 | static const struct proc_ops lttng_proc_ops = { |
481 | .proc_ioctl = lttng_ioctl, | |
482 | #ifdef CONFIG_COMPAT | |
483 | .proc_compat_ioctl = lttng_ioctl, | |
484 | #endif /* CONFIG_COMPAT */ | |
485 | }; | |
486 | #else | |
487 | static const struct file_operations lttng_proc_ops = { | |
a33c9927 | 488 | .owner = THIS_MODULE, |
ad1c05e1 MD |
489 | .unlocked_ioctl = lttng_ioctl, |
490 | #ifdef CONFIG_COMPAT | |
03037b98 | 491 | .compat_ioctl = lttng_ioctl, |
059de147 | 492 | #endif /* CONFIG_COMPAT */ |
11b5a3c2 | 493 | }; |
059de147 | 494 | #endif |
ad1c05e1 | 495 | |
5dbbdb43 | 496 | static |
c0e31d2e | 497 | int lttng_abi_create_channel(struct file *session_file, |
606828e4 | 498 | struct lttng_kernel_abi_channel *chan_param, |
5dbbdb43 | 499 | enum channel_type channel_type) |
baf20995 | 500 | { |
8cdc1a81 | 501 | struct lttng_kernel_session *session = session_file->private_data; |
88dfd899 | 502 | const struct file_operations *fops = NULL; |
5dbbdb43 | 503 | const char *transport_name; |
f7d06400 | 504 | struct lttng_kernel_channel_buffer *chan; |
c0e31d2e | 505 | struct file *chan_file; |
baf20995 | 506 | int chan_fd; |
ad1c05e1 | 507 | int ret = 0; |
baf20995 | 508 | |
2a059b14 | 509 | chan_fd = get_unused_fd_flags(0); |
baf20995 MD |
510 | if (chan_fd < 0) { |
511 | ret = chan_fd; | |
512 | goto fd_error; | |
513 | } | |
88dfd899 MD |
514 | switch (channel_type) { |
515 | case PER_CPU_CHANNEL: | |
516 | fops = <tng_channel_fops; | |
517 | break; | |
518 | case METADATA_CHANNEL: | |
519 | fops = <tng_metadata_fops; | |
520 | break; | |
521 | } | |
2470a237 | 522 | |
c0e31d2e | 523 | chan_file = anon_inode_getfile("[lttng_channel]", |
88dfd899 | 524 | fops, |
03037b98 | 525 | NULL, O_RDWR); |
c0e31d2e MD |
526 | if (IS_ERR(chan_file)) { |
527 | ret = PTR_ERR(chan_file); | |
baf20995 MD |
528 | goto file_error; |
529 | } | |
5dbbdb43 MD |
530 | switch (channel_type) { |
531 | case PER_CPU_CHANNEL: | |
606828e4 | 532 | if (chan_param->output == LTTNG_KERNEL_ABI_SPLICE) { |
6dccd6c1 | 533 | transport_name = chan_param->overwrite ? |
96ba7208 | 534 | "relay-overwrite" : "relay-discard"; |
606828e4 | 535 | } else if (chan_param->output == LTTNG_KERNEL_ABI_MMAP) { |
6dccd6c1 | 536 | transport_name = chan_param->overwrite ? |
96ba7208 JD |
537 | "relay-overwrite-mmap" : "relay-discard-mmap"; |
538 | } else { | |
539 | return -EINVAL; | |
540 | } | |
5dbbdb43 | 541 | break; |
5dbbdb43 | 542 | case METADATA_CHANNEL: |
606828e4 | 543 | if (chan_param->output == LTTNG_KERNEL_ABI_SPLICE) |
96ba7208 | 544 | transport_name = "relay-metadata"; |
606828e4 | 545 | else if (chan_param->output == LTTNG_KERNEL_ABI_MMAP) |
96ba7208 JD |
546 | transport_name = "relay-metadata-mmap"; |
547 | else | |
548 | return -EINVAL; | |
5dbbdb43 MD |
549 | break; |
550 | default: | |
551 | transport_name = "<unknown>"; | |
552 | break; | |
553 | } | |
98d7281c MJ |
554 | if (!atomic_long_add_unless(&session_file->f_count, 1, LONG_MAX)) { |
555 | ret = -EOVERFLOW; | |
9c1f4643 MD |
556 | goto refcount_error; |
557 | } | |
03037b98 MD |
558 | /* |
559 | * We tolerate no failure path after channel creation. It will stay | |
560 | * invariant for the rest of the session. | |
561 | */ | |
4e252d1e | 562 | chan = lttng_channel_buffer_create(session, transport_name, NULL, |
6dccd6c1 JD |
563 | chan_param->subbuf_size, |
564 | chan_param->num_subbuf, | |
565 | chan_param->switch_timer_interval, | |
d83004aa JD |
566 | chan_param->read_timer_interval, |
567 | channel_type); | |
03037b98 | 568 | if (!chan) { |
f3d01b96 | 569 | ret = -EINVAL; |
03037b98 MD |
570 | goto chan_error; |
571 | } | |
f7d06400 | 572 | chan->priv->parent.file = chan_file; |
c0e31d2e MD |
573 | chan_file->private_data = chan; |
574 | fd_install(chan_fd, chan_file); | |
ad1c05e1 | 575 | |
baf20995 MD |
576 | return chan_fd; |
577 | ||
03037b98 | 578 | chan_error: |
9c1f4643 MD |
579 | atomic_long_dec(&session_file->f_count); |
580 | refcount_error: | |
c0e31d2e | 581 | fput(chan_file); |
baf20995 MD |
582 | file_error: |
583 | put_unused_fd(chan_fd); | |
584 | fd_error: | |
baf20995 MD |
585 | return ret; |
586 | } | |
587 | ||
7f859fbf | 588 | static |
8cdc1a81 | 589 | int lttng_abi_session_set_name(struct lttng_kernel_session *session, |
606828e4 | 590 | struct lttng_kernel_abi_session_name *name) |
7f859fbf JR |
591 | { |
592 | size_t len; | |
593 | ||
606828e4 | 594 | len = strnlen(name->name, LTTNG_KERNEL_ABI_SESSION_NAME_LEN); |
7f859fbf | 595 | |
606828e4 | 596 | if (len == LTTNG_KERNEL_ABI_SESSION_NAME_LEN) { |
7f859fbf JR |
597 | /* Name is too long/malformed */ |
598 | return -EINVAL; | |
599 | } | |
600 | ||
8cdc1a81 | 601 | strcpy(session->priv->name, name->name); |
7f859fbf JR |
602 | return 0; |
603 | } | |
604 | ||
1c88f269 | 605 | static |
8cdc1a81 | 606 | int lttng_abi_session_set_creation_time(struct lttng_kernel_session *session, |
606828e4 | 607 | struct lttng_kernel_abi_session_creation_time *time) |
1c88f269 JR |
608 | { |
609 | size_t len; | |
610 | ||
606828e4 | 611 | len = strnlen(time->iso8601, LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN); |
1c88f269 | 612 | |
606828e4 | 613 | if (len == LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN) { |
1c88f269 JR |
614 | /* Time is too long/malformed */ |
615 | return -EINVAL; | |
616 | } | |
617 | ||
8cdc1a81 | 618 | strcpy(session->priv->creation_time, time->iso8601); |
1c88f269 JR |
619 | return 0; |
620 | } | |
621 | ||
99f52fcc FD |
622 | static |
623 | int lttng_counter_release(struct inode *inode, struct file *file) | |
624 | { | |
76ba9cee | 625 | struct lttng_kernel_channel_counter *counter = file->private_data; |
99f52fcc FD |
626 | |
627 | if (counter) { | |
628 | /* | |
629 | * Do not destroy the counter itself. Wait of the owner | |
630 | * (event_notifier group) to be destroyed. | |
631 | */ | |
76ba9cee | 632 | fput(counter->priv->owner); |
99f52fcc FD |
633 | } |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
3bca4b7a MD |
638 | static |
639 | int copy_user_event_param_ext(struct lttng_kernel_abi_event_ext *event_param_ext, | |
640 | struct lttng_kernel_abi_event *event_param) | |
641 | { | |
642 | struct lttng_kernel_abi_event_ext __user *uevent_ext = | |
643 | (struct lttng_kernel_abi_event_ext __user *) (unsigned long) event_param->event_ext; | |
644 | uint32_t len; | |
645 | int ret; | |
646 | ||
3bca4b7a MD |
647 | /* Use zeroed defaults if extension parameters are not set. */ |
648 | if (!uevent_ext) | |
649 | return 0; | |
650 | ret = get_user(len, &uevent_ext->len); | |
651 | if (ret) | |
652 | return ret; | |
bd8af103 MD |
653 | if (len > PAGE_SIZE) |
654 | return -E2BIG; | |
655 | ret = lttng_copy_struct_from_user(event_param_ext, sizeof(*event_param_ext), uevent_ext, len); | |
656 | if (ret) | |
657 | return ret; | |
3bca4b7a MD |
658 | /* Ensure that len is consistent with the initial get_user(). */ |
659 | event_param_ext->len = len; | |
bd8af103 MD |
660 | |
661 | /* Validate that we know of all flags and enum values used. */ | |
662 | switch (event_param_ext->match_check) { | |
663 | case LTTNG_KERNEL_ABI_MATCH_DEFAULT: | |
664 | lttng_fallthrough; | |
665 | case LTTNG_KERNEL_ABI_MATCH_IMMEDIATE: | |
666 | lttng_fallthrough; | |
667 | case LTTNG_KERNEL_ABI_MATCH_LAZY: | |
668 | break; | |
669 | default: | |
670 | return -EINVAL; | |
671 | } | |
3bca4b7a MD |
672 | return 0; |
673 | } | |
674 | ||
675 | static | |
676 | int user_event_param_ext_get_match_check(const struct lttng_kernel_abi_event_ext *event_param_ext, | |
677 | enum lttng_kernel_abi_match_check *_match_check) | |
678 | { | |
679 | enum lttng_kernel_abi_match_check match_check = LTTNG_KERNEL_ABI_MATCH_DEFAULT; | |
680 | ||
681 | if (event_param_ext->len < offsetofend(struct lttng_kernel_abi_event_ext, match_check)) | |
682 | goto end; | |
683 | match_check = event_param_ext->match_check; | |
3bca4b7a MD |
684 | end: |
685 | *_match_check = match_check; | |
686 | return 0; | |
687 | } | |
688 | ||
7b0f1e69 | 689 | static |
d9a337ba MD |
690 | int create_counter_key_from_abi_dimensions(struct lttng_kernel_counter_key **_counter_key, |
691 | uint32_t nr_dimensions, void __user *ptr) | |
7b0f1e69 | 692 | { |
7b0f1e69 MD |
693 | struct lttng_kernel_abi_counter_key_dimension __user *udimension; |
694 | struct lttng_kernel_abi_counter_key_dimension kdimension = {}; | |
d9a337ba MD |
695 | struct lttng_kernel_counter_key *counter_key = NULL; |
696 | struct lttng_key_token *token_array = NULL; | |
697 | uint32_t i; | |
7b0f1e69 MD |
698 | int ret = 0; |
699 | ||
7b0f1e69 MD |
700 | if (!nr_dimensions || nr_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) |
701 | return -EINVAL; | |
702 | counter_key = kzalloc(sizeof(*counter_key), GFP_KERNEL); | |
703 | if (!counter_key) | |
704 | return -ENOMEM; | |
705 | counter_key->nr_dimensions = nr_dimensions; | |
d9a337ba MD |
706 | /* Only a single dimension is supported. */ |
707 | if (WARN_ON_ONCE(nr_dimensions != 1)) { | |
7b0f1e69 MD |
708 | ret = -EINVAL; |
709 | goto error; | |
710 | } | |
d9a337ba MD |
711 | udimension = (struct lttng_kernel_abi_counter_key_dimension __user *)ptr; |
712 | ret = lttng_copy_struct_from_user(&kdimension, sizeof(kdimension), udimension, sizeof(*udimension)); | |
7b0f1e69 MD |
713 | if (ret) |
714 | goto error; | |
d9a337ba | 715 | if (kdimension.len > PAGE_SIZE) { |
7b0f1e69 MD |
716 | ret = -E2BIG; |
717 | goto error; | |
718 | } | |
d9a337ba MD |
719 | switch (kdimension.key_type) { |
720 | case LTTNG_KERNEL_ABI_KEY_TYPE_TOKENS: | |
721 | { | |
722 | struct lttng_kernel_abi_counter_key_dimension_tokens kdimension_tokens = {}; | |
723 | struct lttng_kernel_abi_counter_key_dimension_tokens __user *udimension_tokens; | |
724 | struct lttng_kernel_abi_key_token __user *utoken; | |
725 | uint32_t nr_tokens; | |
726 | ||
727 | udimension_tokens = (struct lttng_kernel_abi_counter_key_dimension_tokens __user *)ptr; | |
728 | ret = lttng_copy_struct_from_user(&kdimension_tokens, sizeof(kdimension_tokens), | |
729 | udimension_tokens, kdimension.len); | |
7b0f1e69 MD |
730 | if (ret) |
731 | goto error; | |
d9a337ba MD |
732 | nr_tokens = kdimension_tokens.nr_key_tokens; |
733 | if (nr_tokens > LTTNG_KERNEL_COUNTER_MAX_TOKENS) { | |
734 | ret = -EINVAL; | |
735 | goto error; | |
736 | } | |
737 | token_array = kzalloc(nr_tokens * sizeof(*token_array), GFP_KERNEL); | |
738 | if (!token_array) { | |
739 | ret = -ENOMEM; | |
740 | goto error; | |
741 | } | |
742 | counter_key->dimension_array[0].token_array = token_array; | |
743 | counter_key->dimension_array[0].nr_key_tokens = nr_tokens; | |
744 | utoken = (struct lttng_kernel_abi_key_token __user *)((unsigned long)ptr + kdimension.len); | |
745 | for (i = 0; i < nr_tokens; i++) { | |
746 | struct lttng_kernel_abi_key_token ktoken = {}; | |
747 | struct lttng_key_token *key_token = &token_array[i]; | |
748 | uint32_t token_len = 0; | |
749 | ||
750 | ret = lttng_copy_struct_from_user(&ktoken, sizeof(ktoken), utoken, sizeof(*utoken)); | |
7b0f1e69 MD |
751 | if (ret) |
752 | goto error; | |
d9a337ba MD |
753 | token_len += ktoken.len; |
754 | switch (ktoken.type) { | |
755 | case LTTNG_KERNEL_ABI_KEY_TOKEN_STRING: | |
756 | { | |
757 | struct lttng_kernel_abi_key_token_string __user *utoken_string; | |
758 | struct lttng_kernel_abi_key_token_string *ktoken_string; | |
759 | char __user *string_ptr; | |
760 | size_t string_len; | |
761 | ||
762 | utoken_string = (struct lttng_kernel_abi_key_token_string __user *) utoken; | |
763 | ret = lttng_copy_struct_from_user(&ktoken_string, sizeof(ktoken_string), | |
764 | utoken_string, ktoken.len); | |
765 | if (ret) | |
766 | goto error; | |
767 | string_ptr = (char __user *) ((unsigned long)utoken_string + ktoken.len); | |
768 | string_len = ktoken_string->string_len; | |
769 | key_token->type = LTTNG_KEY_TOKEN_STRING; | |
770 | if (!string_len || string_len > PAGE_SIZE) { | |
771 | ret = -EINVAL; | |
772 | goto error; | |
773 | } | |
774 | key_token->str = kzalloc(string_len, GFP_KERNEL); | |
775 | if (!key_token->str) { | |
776 | ret = -ENOMEM; | |
777 | goto error; | |
778 | } | |
779 | ret = copy_from_user(key_token->str, string_ptr, string_len); | |
780 | if (ret) | |
781 | goto error; | |
782 | if (key_token->str[string_len - 1] != '\0') { | |
783 | ret = -EINVAL; | |
784 | goto error; | |
785 | } | |
786 | token_len += string_len; | |
787 | break; | |
788 | } | |
789 | case LTTNG_KERNEL_ABI_KEY_TOKEN_EVENT_NAME: | |
790 | key_token->type = LTTNG_KEY_TOKEN_EVENT_NAME; | |
791 | break; | |
792 | ||
793 | case LTTNG_KERNEL_ABI_KEY_TOKEN_PROVIDER_NAME: | |
794 | lttng_fallthrough; | |
795 | default: | |
7b0f1e69 MD |
796 | ret = -EINVAL; |
797 | goto error; | |
798 | } | |
d9a337ba | 799 | utoken = (struct lttng_kernel_abi_key_token __user *)((unsigned long)utoken + token_len); |
7b0f1e69 | 800 | } |
7b0f1e69 | 801 | |
d9a337ba MD |
802 | break; |
803 | } | |
804 | case LTTNG_KERNEL_ABI_KEY_TYPE_INTEGER: | |
805 | default: | |
806 | ret = -EINVAL; | |
807 | goto error; | |
7b0f1e69 MD |
808 | } |
809 | *_counter_key = counter_key; | |
810 | return 0; | |
811 | ||
812 | error: | |
813 | destroy_counter_key(counter_key); | |
814 | return ret; | |
815 | } | |
816 | ||
817 | int create_counter_key_from_kernel(struct lttng_kernel_counter_key **_new_key, | |
818 | const struct lttng_kernel_counter_key *src_key) | |
819 | { | |
820 | struct lttng_kernel_counter_key *new_key; | |
821 | int i, ret = 0; | |
822 | ||
823 | new_key = kzalloc(sizeof(*new_key), GFP_KERNEL); | |
824 | if (!new_key) | |
825 | return -ENOMEM; | |
826 | new_key->nr_dimensions = src_key->nr_dimensions; | |
827 | for (i = 0; i < src_key->nr_dimensions; i++) { | |
828 | struct lttng_kernel_counter_key_dimension *new_dimension = &new_key->dimension_array[i]; | |
829 | const struct lttng_kernel_counter_key_dimension *src_dimension = &src_key->dimension_array[i]; | |
830 | uint32_t nr_tokens = src_dimension->nr_key_tokens; | |
831 | int j; | |
832 | ||
833 | new_dimension->nr_key_tokens = nr_tokens; | |
834 | new_dimension->token_array = kzalloc(nr_tokens * sizeof(*new_dimension->token_array), GFP_KERNEL); | |
835 | if (!new_dimension->token_array) { | |
836 | ret = -ENOMEM; | |
837 | goto error; | |
838 | } | |
839 | for (j = 0; j < nr_tokens; j++) { | |
840 | struct lttng_key_token *new_key_token = &new_dimension->token_array[j]; | |
841 | struct lttng_key_token *src_key_token = &src_dimension->token_array[j]; | |
842 | ||
843 | switch (src_key_token->type) { | |
844 | case LTTNG_KEY_TOKEN_STRING: | |
845 | new_key_token->type = LTTNG_KEY_TOKEN_STRING; | |
846 | new_key_token->str = kstrdup(src_key_token->str, GFP_KERNEL); | |
847 | if (!new_key_token->str) { | |
848 | ret = -ENOMEM; | |
849 | goto error; | |
850 | } | |
851 | break; | |
852 | case LTTNG_KEY_TOKEN_EVENT_NAME: | |
853 | new_key_token->type = LTTNG_KEY_TOKEN_EVENT_NAME; | |
854 | break; | |
855 | ||
856 | default: | |
857 | ret = -EINVAL; | |
858 | goto error; | |
859 | } | |
860 | } | |
861 | } | |
862 | *_new_key = new_key; | |
863 | return 0; | |
864 | ||
865 | error: | |
866 | destroy_counter_key(new_key); | |
867 | return ret; | |
868 | } | |
869 | ||
870 | void destroy_counter_key(struct lttng_kernel_counter_key *counter_key) | |
871 | { | |
872 | int i; | |
873 | ||
874 | if (!counter_key) | |
875 | return; | |
876 | for (i = 0; i < counter_key->nr_dimensions; i++) { | |
877 | struct lttng_kernel_counter_key_dimension *dimension = &counter_key->dimension_array[i]; | |
878 | uint32_t nr_tokens = dimension->nr_key_tokens; | |
879 | int j; | |
880 | ||
881 | for (j = 0; j < nr_tokens; j++) { | |
882 | struct lttng_key_token *key_token = &dimension->token_array[j]; | |
883 | ||
884 | switch (key_token->type) { | |
885 | case LTTNG_KEY_TOKEN_STRING: | |
886 | kfree(key_token->str); | |
887 | break; | |
888 | ||
889 | case LTTNG_KEY_TOKEN_EVENT_NAME: | |
890 | lttng_fallthrough; | |
891 | case LTTNG_KEY_TOKEN_UNKNOWN: | |
892 | break; | |
893 | ||
894 | default: | |
895 | WARN_ON_ONCE(1); | |
896 | } | |
897 | } | |
898 | kfree(dimension->token_array); | |
899 | } | |
900 | kfree(counter_key); | |
901 | } | |
902 | ||
99f52fcc | 903 | static |
9005f768 MD |
904 | long lttng_counter_ioctl_abi_old_counter_read(struct lttng_kernel_channel_counter *counter, |
905 | unsigned int cmd, unsigned long arg) | |
99f52fcc | 906 | { |
9005f768 MD |
907 | size_t indexes[LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX] = {}; |
908 | struct lttng_kernel_abi_old_counter_read local_counter_read; | |
909 | struct lttng_kernel_abi_old_counter_read __user *ucounter_read = | |
910 | (struct lttng_kernel_abi_old_counter_read __user *) arg; | |
911 | bool overflow, underflow; | |
912 | int64_t value; | |
913 | int32_t cpu; | |
914 | int ret, i; | |
915 | ||
916 | if (copy_from_user(&local_counter_read, ucounter_read, | |
917 | sizeof(local_counter_read))) | |
918 | return -EFAULT; | |
919 | if (validate_zeroed_padding(local_counter_read.padding, | |
920 | sizeof(local_counter_read.padding))) | |
921 | return -EINVAL; | |
922 | if (local_counter_read.index.number_dimensions > LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX) | |
923 | return -EINVAL; | |
924 | /* Cast all indexes into size_t. */ | |
925 | for (i = 0; i < local_counter_read.index.number_dimensions; i++) | |
926 | indexes[i] = local_counter_read.index.dimension_indexes[i]; | |
927 | cpu = local_counter_read.cpu; | |
99f52fcc | 928 | |
9005f768 MD |
929 | ret = lttng_kernel_counter_read(counter, indexes, cpu, &value, &overflow, &underflow); |
930 | if (ret) | |
931 | return ret; | |
932 | local_counter_read.value.value = value; | |
933 | local_counter_read.value.overflow = overflow; | |
934 | local_counter_read.value.underflow = underflow; | |
99f52fcc | 935 | |
9005f768 MD |
936 | if (copy_to_user(&ucounter_read->value, &local_counter_read.value, |
937 | sizeof(local_counter_read.value))) | |
938 | return -EFAULT; | |
99f52fcc | 939 | |
9005f768 MD |
940 | return 0; |
941 | } | |
99f52fcc | 942 | |
9005f768 MD |
943 | static |
944 | long lttng_counter_ioctl_abi_old_counter_aggregate(struct lttng_kernel_channel_counter *counter, | |
945 | unsigned int cmd, unsigned long arg) | |
946 | { | |
947 | size_t indexes[LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX] = {}; | |
948 | struct lttng_kernel_abi_old_counter_aggregate local_counter_aggregate; | |
949 | struct lttng_kernel_abi_old_counter_aggregate __user *ucounter_aggregate = | |
950 | (struct lttng_kernel_abi_old_counter_aggregate __user *) arg; | |
951 | bool overflow, underflow; | |
952 | int64_t value; | |
953 | int ret, i; | |
954 | ||
955 | if (copy_from_user(&local_counter_aggregate, ucounter_aggregate, | |
956 | sizeof(local_counter_aggregate))) | |
957 | return -EFAULT; | |
958 | if (validate_zeroed_padding(local_counter_aggregate.padding, | |
959 | sizeof(local_counter_aggregate.padding))) | |
960 | return -EINVAL; | |
961 | if (local_counter_aggregate.index.number_dimensions > LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX) | |
962 | return -EINVAL; | |
963 | /* Cast all indexes into size_t. */ | |
964 | for (i = 0; i < local_counter_aggregate.index.number_dimensions; i++) | |
965 | indexes[i] = local_counter_aggregate.index.dimension_indexes[i]; | |
99f52fcc | 966 | |
9005f768 MD |
967 | ret = lttng_kernel_counter_aggregate(counter, indexes, &value, &overflow, &underflow); |
968 | if (ret) | |
969 | return ret; | |
970 | local_counter_aggregate.value.value = value; | |
971 | local_counter_aggregate.value.overflow = overflow; | |
972 | local_counter_aggregate.value.underflow = underflow; | |
99f52fcc | 973 | |
9005f768 MD |
974 | if (copy_to_user(&ucounter_aggregate->value, &local_counter_aggregate.value, |
975 | sizeof(local_counter_aggregate.value))) | |
976 | return -EFAULT; | |
99f52fcc | 977 | |
9005f768 MD |
978 | return 0; |
979 | } | |
99f52fcc | 980 | |
9005f768 MD |
981 | static |
982 | long lttng_counter_ioctl_abi_old_counter_clear(struct lttng_kernel_channel_counter *counter, | |
983 | unsigned int cmd, unsigned long arg) | |
984 | { | |
985 | size_t indexes[LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX] = {}; | |
986 | struct lttng_kernel_abi_old_counter_clear local_counter_clear; | |
987 | struct lttng_kernel_abi_old_counter_clear __user *ucounter_clear = | |
988 | (struct lttng_kernel_abi_old_counter_clear __user *) arg; | |
989 | int i; | |
99f52fcc | 990 | |
9005f768 MD |
991 | if (copy_from_user(&local_counter_clear, ucounter_clear, |
992 | sizeof(local_counter_clear))) | |
993 | return -EFAULT; | |
994 | if (validate_zeroed_padding(local_counter_clear.padding, | |
995 | sizeof(local_counter_clear.padding))) | |
996 | return -EINVAL; | |
997 | if (local_counter_clear.index.number_dimensions > LTTNG_KERNEL_ABI_OLD_COUNTER_DIMENSION_MAX) | |
998 | return -EINVAL; | |
999 | /* Cast all indexes into size_t. */ | |
1000 | for (i = 0; i < local_counter_clear.index.number_dimensions; i++) | |
1001 | indexes[i] = local_counter_clear.index.dimension_indexes[i]; | |
1002 | return lttng_kernel_counter_clear(counter, indexes); | |
1003 | } | |
99f52fcc | 1004 | |
9005f768 MD |
1005 | static |
1006 | long lttng_counter_ioctl_abi_counter_read(struct lttng_kernel_channel_counter *counter, | |
1007 | unsigned int cmd, unsigned long arg) | |
1008 | { | |
1009 | size_t indexes[LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS] = {}; | |
1010 | struct lttng_kernel_abi_counter_read kcounter_read = {}; | |
1011 | struct lttng_kernel_abi_counter_read __user *ucounter_read = | |
1012 | (struct lttng_kernel_abi_counter_read __user *) arg; | |
1013 | uint32_t len, number_dimensions; | |
1014 | bool overflow, underflow; | |
1015 | int64_t value; | |
1016 | int32_t cpu; | |
1017 | int ret, i; | |
1018 | ||
1019 | ret = get_user(len, &ucounter_read->len); | |
1020 | if (ret) | |
1021 | return ret; | |
1022 | if (len > PAGE_SIZE) | |
1023 | return -E2BIG; | |
1024 | if (len < offsetofend(struct lttng_kernel_abi_counter_read, value)) | |
1025 | return -EINVAL; | |
1026 | ret = lttng_copy_struct_from_user(&kcounter_read, sizeof(kcounter_read), | |
1027 | ucounter_read, len); | |
1028 | if (ret) | |
1029 | return ret; | |
1030 | number_dimensions = kcounter_read.index.number_dimensions; | |
1031 | if (!number_dimensions || number_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) | |
1032 | return -EINVAL; | |
1033 | /* Cast all indexes into size_t. */ | |
1034 | for (i = 0; i < number_dimensions; i++) { | |
1035 | uint64_t __user *ptr = ((uint64_t __user *)(unsigned long)kcounter_read.index.ptr) + i; | |
1036 | uint64_t index; | |
a3833790 | 1037 | |
9005f768 | 1038 | ret = get_user(index, ptr); |
a3833790 MD |
1039 | if (ret) |
1040 | return ret; | |
9005f768 MD |
1041 | indexes[i] = index; |
1042 | } | |
1043 | cpu = kcounter_read.cpu; | |
1044 | ret = lttng_kernel_counter_read(counter, indexes, cpu, &value, &overflow, &underflow); | |
1045 | if (ret) | |
1046 | return ret; | |
1047 | kcounter_read.value.value = value; | |
1048 | kcounter_read.value.flags |= underflow ? LTTNG_KERNEL_ABI_COUNTER_VALUE_FLAG_UNDERFLOW : 0; | |
1049 | kcounter_read.value.flags |= overflow ? LTTNG_KERNEL_ABI_COUNTER_VALUE_FLAG_OVERFLOW : 0; | |
a3833790 | 1050 | |
9005f768 MD |
1051 | if (copy_to_user(&ucounter_read->value, &kcounter_read.value, sizeof(kcounter_read.value))) |
1052 | return -EFAULT; | |
a3833790 | 1053 | |
9005f768 MD |
1054 | return 0; |
1055 | } | |
a3833790 | 1056 | |
9005f768 MD |
1057 | static |
1058 | long lttng_counter_ioctl_abi_counter_aggregate(struct lttng_kernel_channel_counter *counter, | |
1059 | unsigned int cmd, unsigned long arg) | |
1060 | { | |
1061 | size_t indexes[LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS] = {}; | |
1062 | struct lttng_kernel_abi_counter_aggregate kcounter_aggregate = {}; | |
1063 | struct lttng_kernel_abi_counter_aggregate __user *ucounter_aggregate = | |
1064 | (struct lttng_kernel_abi_counter_aggregate __user *) arg; | |
1065 | uint32_t len, number_dimensions; | |
1066 | bool overflow, underflow; | |
1067 | int64_t value; | |
1068 | int ret, i; | |
1069 | ||
1070 | ret = get_user(len, &ucounter_aggregate->len); | |
1071 | if (ret) | |
1072 | return ret; | |
1073 | if (len > PAGE_SIZE) | |
1074 | return -E2BIG; | |
1075 | if (len < offsetofend(struct lttng_kernel_abi_counter_aggregate, value)) | |
1076 | return -EINVAL; | |
1077 | ret = lttng_copy_struct_from_user(&kcounter_aggregate, sizeof(kcounter_aggregate), | |
1078 | ucounter_aggregate, len); | |
1079 | if (ret) | |
1080 | return ret; | |
1081 | number_dimensions = kcounter_aggregate.index.number_dimensions; | |
1082 | if (!number_dimensions || number_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) | |
1083 | return -EINVAL; | |
1084 | /* Cast all indexes into size_t. */ | |
1085 | for (i = 0; i < number_dimensions; i++) { | |
1086 | uint64_t __user *ptr = ((uint64_t __user *)(unsigned long)kcounter_aggregate.index.ptr) + i; | |
1087 | uint64_t index; | |
a3833790 | 1088 | |
9005f768 | 1089 | ret = get_user(index, ptr); |
a3833790 MD |
1090 | if (ret) |
1091 | return ret; | |
9005f768 MD |
1092 | indexes[i] = index; |
1093 | } | |
1094 | ret = lttng_kernel_counter_aggregate(counter, indexes, &value, &overflow, &underflow); | |
1095 | if (ret) | |
1096 | return ret; | |
1097 | kcounter_aggregate.value.value = value; | |
1098 | kcounter_aggregate.value.flags |= underflow ? LTTNG_KERNEL_ABI_COUNTER_VALUE_FLAG_UNDERFLOW : 0; | |
1099 | kcounter_aggregate.value.flags |= overflow ? LTTNG_KERNEL_ABI_COUNTER_VALUE_FLAG_OVERFLOW : 0; | |
a3833790 | 1100 | |
9005f768 MD |
1101 | if (copy_to_user(&ucounter_aggregate->value, &kcounter_aggregate.value, sizeof(kcounter_aggregate.value))) |
1102 | return -EFAULT; | |
a3833790 | 1103 | |
9005f768 MD |
1104 | return 0; |
1105 | } | |
a3833790 | 1106 | |
9005f768 MD |
1107 | static |
1108 | long lttng_counter_ioctl_abi_counter_clear(struct lttng_kernel_channel_counter *counter, | |
1109 | unsigned int cmd, unsigned long arg) | |
1110 | { | |
1111 | size_t indexes[LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS] = {}; | |
1112 | struct lttng_kernel_abi_counter_clear kcounter_clear = {}; | |
1113 | struct lttng_kernel_abi_counter_clear __user *ucounter_clear = | |
1114 | (struct lttng_kernel_abi_counter_clear __user *) arg; | |
1115 | uint32_t len, number_dimensions; | |
1116 | int ret, i; | |
1117 | ||
1118 | ret = get_user(len, &ucounter_clear->len); | |
1119 | if (ret) | |
1120 | return ret; | |
1121 | if (len > PAGE_SIZE) | |
1122 | return -E2BIG; | |
1123 | if (len < offsetofend(struct lttng_kernel_abi_counter_clear, index)) | |
1124 | return -EINVAL; | |
1125 | ret = lttng_copy_struct_from_user(&kcounter_clear, sizeof(kcounter_clear), | |
1126 | ucounter_clear, len); | |
1127 | if (ret) | |
1128 | return ret; | |
1129 | number_dimensions = kcounter_clear.index.number_dimensions; | |
1130 | if (!number_dimensions || number_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) | |
1131 | return -EINVAL; | |
1132 | /* Cast all indexes into size_t. */ | |
1133 | for (i = 0; i < number_dimensions; i++) { | |
1134 | uint64_t __user *ptr = ((uint64_t __user *)(unsigned long)kcounter_clear.index.ptr) + i; | |
1135 | uint64_t index; | |
a3833790 | 1136 | |
9005f768 | 1137 | ret = get_user(index, ptr); |
a3833790 MD |
1138 | if (ret) |
1139 | return ret; | |
9005f768 MD |
1140 | indexes[i] = index; |
1141 | } | |
1142 | return lttng_kernel_counter_clear(counter, indexes); | |
1143 | } | |
a3833790 | 1144 | |
9005f768 MD |
1145 | static |
1146 | long lttng_counter_ioctl_abi_counter_event(struct file *file, | |
1147 | struct lttng_kernel_channel_counter *counter, | |
1148 | unsigned int cmd, unsigned long arg) | |
1149 | { | |
1150 | struct lttng_kernel_abi_counter_event __user *ucounter_event = | |
1151 | (struct lttng_kernel_abi_counter_event __user *) arg; | |
1152 | struct lttng_kernel_abi_counter_event kcounter_event = {}; | |
1153 | struct lttng_kernel_counter_event *counter_event; | |
1154 | uint32_t len; | |
1155 | int ret; | |
1156 | ||
1157 | ret = get_user(len, &ucounter_event->len); | |
1158 | if (ret) | |
1159 | return ret; | |
1160 | if (len > PAGE_SIZE) | |
1161 | return -E2BIG; | |
d9a337ba | 1162 | if (len < offsetofend(struct lttng_kernel_abi_counter_event, number_key_dimensions)) |
9005f768 MD |
1163 | return -EINVAL; |
1164 | counter_event = kzalloc(sizeof(*counter_event), GFP_KERNEL); | |
d9a337ba | 1165 | if (!counter_event) |
9005f768 | 1166 | return -ENOMEM; |
9005f768 MD |
1167 | ret = lttng_copy_struct_from_user(&kcounter_event, sizeof(kcounter_event), |
1168 | ucounter_event, len); | |
1169 | if (ret) | |
1170 | goto end_counter_event; | |
1171 | memcpy(&counter_event->event_param, &kcounter_event.event, sizeof(counter_event->event_param)); | |
1172 | ret = copy_user_event_param_ext(&counter_event->event_param_ext, &kcounter_event.event); | |
1173 | if (ret) | |
1174 | goto end_counter_event; | |
d9a337ba MD |
1175 | switch (kcounter_event.action) { |
1176 | case LTTNG_KERNEL_ABI_COUNTER_ACTION_INCREMENT: | |
1177 | /* No specific data for this action. */ | |
1178 | break; | |
1179 | default: | |
1180 | ret = -EINVAL; | |
1181 | goto end_counter_event; | |
1182 | } | |
1183 | ret = create_counter_key_from_abi_dimensions(&counter_event->counter_key, | |
1184 | kcounter_event.number_key_dimensions, | |
1185 | (void __user *) arg + len); | |
9005f768 MD |
1186 | if (ret) |
1187 | goto end_counter_event; | |
1188 | ret = lttng_abi_create_event_counter_enabler(file, counter_event); | |
1189 | destroy_counter_key(counter_event->counter_key); | |
1190 | end_counter_event: | |
1191 | kfree(counter_event); | |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | static | |
1196 | long lttng_counter_ioctl_abi_counter_map_descriptor(struct lttng_kernel_channel_counter *counter, | |
1197 | unsigned int cmd, unsigned long arg) | |
1198 | { | |
1199 | struct lttng_kernel_abi_counter_map_descriptor __user *udescriptor = | |
1200 | (struct lttng_kernel_abi_counter_map_descriptor __user *) arg; | |
9005f768 MD |
1201 | struct lttng_kernel_abi_counter_map_descriptor kdescriptor = {}; |
1202 | struct lttng_counter_map_descriptor *descriptor; | |
1203 | char key[LTTNG_KERNEL_COUNTER_KEY_LEN] = {}; | |
d9a337ba | 1204 | uint64_t array_indexes[1]; |
9005f768 MD |
1205 | size_t key_strlen; |
1206 | uint32_t len; | |
1207 | int ret; | |
1208 | ||
1209 | ret = get_user(len, &udescriptor->len); | |
1210 | if (ret) | |
1211 | return ret; | |
1212 | if (len > PAGE_SIZE) | |
1213 | return -E2BIG; | |
d9a337ba | 1214 | if (len < offsetofend(struct lttng_kernel_abi_counter_map_descriptor, array_indexes_len)) |
9005f768 MD |
1215 | return -EINVAL; |
1216 | ret = lttng_copy_struct_from_user(&kdescriptor, sizeof(kdescriptor), udescriptor, len); | |
1217 | if (ret) | |
1218 | return ret; | |
9005f768 MD |
1219 | mutex_lock(&counter->priv->map.lock); |
1220 | if (kdescriptor.descriptor_index >= counter->priv->map.nr_descriptors) { | |
1221 | ret = -EOVERFLOW; | |
1222 | goto map_descriptor_error_unlock; | |
1223 | } | |
d9a337ba MD |
1224 | if (kdescriptor.array_indexes_len < 1) { |
1225 | ret = -EINVAL; | |
1226 | goto map_descriptor_error_unlock; | |
1227 | } | |
1228 | kdescriptor.array_indexes_len = 1; | |
9005f768 | 1229 | descriptor = &counter->priv->map.descriptors[kdescriptor.descriptor_index]; |
d9a337ba | 1230 | kdescriptor.dimension = 0; |
9005f768 | 1231 | kdescriptor.user_token = descriptor->user_token; |
9005f768 | 1232 | memcpy(&key, descriptor->key, LTTNG_KERNEL_COUNTER_KEY_LEN); |
d9a337ba | 1233 | array_indexes[0] = descriptor->array_index; |
9005f768 MD |
1234 | mutex_unlock(&counter->priv->map.lock); |
1235 | ||
1236 | key_strlen = strlen(key) + 1; | |
d9a337ba MD |
1237 | if (kdescriptor.key_string_len < key_strlen) |
1238 | return -ENOSPC; | |
9005f768 | 1239 | kdescriptor.key_string_len = key_strlen; |
d9a337ba MD |
1240 | if (copy_to_user((char __user *)(unsigned long)kdescriptor.key_string, key, key_strlen)) |
1241 | return -EFAULT; | |
1242 | if (copy_to_user((uint64_t __user *)(unsigned long)kdescriptor.array_indexes, array_indexes, sizeof(uint64_t))) | |
1243 | return -EFAULT; | |
9005f768 MD |
1244 | if (copy_to_user(udescriptor, &kdescriptor, min(sizeof(kdescriptor), (size_t)len))) |
1245 | return -EFAULT; | |
9005f768 MD |
1246 | return 0; |
1247 | ||
1248 | map_descriptor_error_unlock: | |
1249 | mutex_unlock(&counter->priv->map.lock); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | static | |
1254 | long lttng_counter_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
1255 | { | |
1256 | struct lttng_kernel_channel_counter *counter = file->private_data; | |
1257 | ||
1258 | switch (cmd) { | |
1259 | case LTTNG_KERNEL_ABI_OLD_COUNTER_READ: | |
1260 | return lttng_counter_ioctl_abi_old_counter_read(counter, cmd, arg); | |
1261 | case LTTNG_KERNEL_ABI_OLD_COUNTER_AGGREGATE: | |
1262 | return lttng_counter_ioctl_abi_old_counter_aggregate(counter, cmd, arg); | |
1263 | case LTTNG_KERNEL_ABI_OLD_COUNTER_CLEAR: | |
1264 | return lttng_counter_ioctl_abi_old_counter_clear(counter, cmd, arg); | |
1265 | case LTTNG_KERNEL_ABI_COUNTER_READ: | |
1266 | return lttng_counter_ioctl_abi_counter_read(counter, cmd, arg); | |
1267 | case LTTNG_KERNEL_ABI_COUNTER_AGGREGATE: | |
1268 | return lttng_counter_ioctl_abi_counter_aggregate(counter, cmd, arg); | |
1269 | case LTTNG_KERNEL_ABI_COUNTER_CLEAR: | |
1270 | return lttng_counter_ioctl_abi_counter_clear(counter, cmd, arg); | |
1271 | case LTTNG_KERNEL_ABI_COUNTER_EVENT: | |
1272 | return lttng_counter_ioctl_abi_counter_event(file, counter, cmd, arg); | |
6ef1e2f5 MD |
1273 | case LTTNG_KERNEL_ABI_ENABLE: |
1274 | return lttng_channel_enable(&counter->parent); | |
1275 | case LTTNG_KERNEL_ABI_DISABLE: | |
1276 | return lttng_channel_disable(&counter->parent); | |
4a6c2fbf MD |
1277 | case LTTNG_KERNEL_ABI_SYSCALL_MASK: |
1278 | return lttng_syscall_table_get_active_mask(&counter->priv->parent.syscall_table, | |
1279 | (struct lttng_kernel_abi_syscall_mask __user *) arg); | |
1280 | case LTTNG_KERNEL_ABI_COUNTER_MAP_NR_DESCRIPTORS: | |
1281 | { | |
1282 | uint64_t __user *user_nr_descriptors = (uint64_t __user *) arg; | |
1283 | uint64_t nr_descriptors; | |
1284 | ||
1285 | mutex_lock(&counter->priv->map.lock); | |
1286 | nr_descriptors = counter->priv->map.nr_descriptors; | |
1287 | mutex_unlock(&counter->priv->map.lock); | |
1288 | return put_user(nr_descriptors, user_nr_descriptors); | |
1289 | } | |
1290 | case LTTNG_KERNEL_ABI_COUNTER_MAP_DESCRIPTOR: | |
9005f768 | 1291 | return lttng_counter_ioctl_abi_counter_map_descriptor(counter, cmd, arg); |
99f52fcc | 1292 | default: |
99f52fcc FD |
1293 | return -ENOSYS; |
1294 | } | |
1295 | } | |
1296 | ||
1297 | static const struct file_operations lttng_counter_fops = { | |
1298 | .owner = THIS_MODULE, | |
1299 | .release = lttng_counter_release, | |
1300 | .unlocked_ioctl = lttng_counter_ioctl, | |
1301 | #ifdef CONFIG_COMPAT | |
1302 | .compat_ioctl = lttng_counter_ioctl, | |
1303 | #endif | |
1304 | }; | |
1305 | ||
1306 | ||
d1f652f8 | 1307 | static |
606828e4 | 1308 | enum tracker_type get_tracker_type(struct lttng_kernel_abi_tracker_args *tracker) |
d1f652f8 MD |
1309 | { |
1310 | switch (tracker->type) { | |
606828e4 | 1311 | case LTTNG_KERNEL_ABI_TRACKER_PID: |
d1f652f8 | 1312 | return TRACKER_PID; |
606828e4 | 1313 | case LTTNG_KERNEL_ABI_TRACKER_VPID: |
d1f652f8 | 1314 | return TRACKER_VPID; |
606828e4 | 1315 | case LTTNG_KERNEL_ABI_TRACKER_UID: |
d1f652f8 | 1316 | return TRACKER_UID; |
606828e4 | 1317 | case LTTNG_KERNEL_ABI_TRACKER_VUID: |
d1f652f8 | 1318 | return TRACKER_VUID; |
606828e4 | 1319 | case LTTNG_KERNEL_ABI_TRACKER_GID: |
d1f652f8 | 1320 | return TRACKER_GID; |
606828e4 | 1321 | case LTTNG_KERNEL_ABI_TRACKER_VGID: |
d1f652f8 MD |
1322 | return TRACKER_VGID; |
1323 | default: | |
1324 | return TRACKER_UNKNOWN; | |
1325 | } | |
1326 | } | |
1327 | ||
81ab5b77 MD |
1328 | static |
1329 | int lttng_abi_copy_user_old_counter_conf(struct lttng_kernel_counter_conf *counter_conf, | |
1330 | struct lttng_kernel_abi_old_counter_conf __user *old_ucounter_conf) | |
1331 | { | |
1332 | struct lttng_kernel_abi_old_counter_conf old_kcounter_conf; | |
1333 | struct lttng_kernel_counter_dimension *dimension; | |
1334 | int ret; | |
1335 | ||
434e86ee | 1336 | memset(counter_conf, 0, sizeof(*counter_conf)); |
81ab5b77 MD |
1337 | ret = copy_from_user(&old_kcounter_conf, old_ucounter_conf, |
1338 | sizeof(old_kcounter_conf)); | |
1339 | if (ret) | |
1340 | return ret; | |
1341 | if (!old_kcounter_conf.number_dimensions || | |
1342 | old_kcounter_conf.number_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) | |
1343 | return -EINVAL; | |
1344 | switch (old_kcounter_conf.arithmetic) { | |
1345 | case LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR: | |
1346 | counter_conf->arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR; | |
1347 | break; | |
1348 | default: | |
1349 | return -EINVAL; | |
1350 | } | |
1351 | switch (old_kcounter_conf.bitness) { | |
1352 | case LTTNG_KERNEL_ABI_COUNTER_BITNESS_32: | |
1353 | counter_conf->bitness = LTTNG_KERNEL_COUNTER_BITNESS_32; | |
1354 | break; | |
1355 | case LTTNG_KERNEL_ABI_COUNTER_BITNESS_64: | |
1356 | counter_conf->bitness = LTTNG_KERNEL_COUNTER_BITNESS_64; | |
1357 | break; | |
1358 | default: | |
1359 | return -EINVAL; | |
1360 | } | |
1361 | counter_conf->global_sum_step = old_kcounter_conf.global_sum_step; | |
1362 | counter_conf->flags |= old_kcounter_conf.coalesce_hits ? | |
1363 | LTTNG_KERNEL_COUNTER_CONF_FLAG_COALESCE_HITS : 0; | |
1364 | dimension = &counter_conf->dimension_array[0]; | |
1365 | dimension->flags |= old_kcounter_conf.dimensions[0].has_underflow ? | |
1366 | LTTNG_KERNEL_COUNTER_DIMENSION_FLAG_UNDERFLOW : 0; | |
1367 | dimension->flags |= old_kcounter_conf.dimensions[0].has_overflow ? | |
1368 | LTTNG_KERNEL_COUNTER_DIMENSION_FLAG_OVERFLOW : 0; | |
1369 | dimension->size = old_kcounter_conf.dimensions[0].size; | |
1370 | dimension->underflow_index = old_kcounter_conf.dimensions[0].underflow_index; | |
1371 | dimension->overflow_index = old_kcounter_conf.dimensions[0].overflow_index; | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | static | |
1376 | int lttng_abi_copy_user_counter_conf(struct lttng_kernel_counter_conf *counter_conf, | |
1377 | struct lttng_kernel_abi_counter_conf __user *ucounter_conf) | |
1378 | { | |
1379 | uint32_t len, number_dimensions; | |
1380 | struct lttng_kernel_abi_counter_conf kcounter_conf = {}; | |
1381 | struct lttng_kernel_counter_dimension *dimension; | |
1382 | struct lttng_kernel_abi_counter_dimension kdimension = {}; | |
1383 | struct lttng_kernel_abi_counter_dimension __user *udimension; | |
1384 | int ret; | |
1385 | ||
434e86ee | 1386 | memset(counter_conf, 0, sizeof(*counter_conf)); |
81ab5b77 MD |
1387 | ret = get_user(len, &ucounter_conf->len); |
1388 | if (ret) | |
1389 | return ret; | |
1390 | if (len < offsetofend(struct lttng_kernel_abi_counter_conf, dimension_array)) | |
1391 | return -EINVAL; | |
1392 | if (len > PAGE_SIZE) | |
1393 | return -EINVAL; | |
1394 | ||
1395 | ret = lttng_copy_struct_from_user(&kcounter_conf, sizeof(kcounter_conf), ucounter_conf, len); | |
1396 | if (ret) | |
1397 | return ret; | |
1398 | ||
1399 | /* Validate flags and enumerations */ | |
1400 | switch (kcounter_conf.arithmetic) { | |
1401 | case LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR: | |
1402 | counter_conf->arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR; | |
1403 | break; | |
1404 | default: | |
1405 | return -EINVAL; | |
1406 | } | |
1407 | switch (kcounter_conf.bitness) { | |
1408 | case LTTNG_KERNEL_ABI_COUNTER_BITNESS_32: | |
1409 | counter_conf->bitness = LTTNG_KERNEL_COUNTER_BITNESS_32; | |
1410 | break; | |
1411 | case LTTNG_KERNEL_ABI_COUNTER_BITNESS_64: | |
1412 | counter_conf->bitness = LTTNG_KERNEL_COUNTER_BITNESS_64; | |
1413 | break; | |
1414 | default: | |
1415 | return -EINVAL; | |
1416 | } | |
1417 | if (kcounter_conf.flags & ~LTTNG_KERNEL_ABI_COUNTER_CONF_FLAG_COALESCE_HITS) | |
1418 | return -EINVAL; | |
1419 | counter_conf->global_sum_step = kcounter_conf.global_sum_step; | |
1420 | counter_conf->flags |= (kcounter_conf.flags & LTTNG_KERNEL_ABI_COUNTER_CONF_FLAG_COALESCE_HITS) ? | |
1421 | LTTNG_KERNEL_COUNTER_CONF_FLAG_COALESCE_HITS : 0; | |
1422 | ||
1423 | number_dimensions = kcounter_conf.dimension_array.number_dimensions; | |
1424 | if (!number_dimensions || number_dimensions > LTTNG_KERNEL_COUNTER_MAX_DIMENSIONS) | |
1425 | return -EINVAL; | |
1426 | dimension = &counter_conf->dimension_array[0]; | |
1427 | len = kcounter_conf.dimension_array.elem_len; | |
1428 | if (len > PAGE_SIZE) | |
1429 | return -E2BIG; | |
1430 | if (len < offsetofend(struct lttng_kernel_abi_counter_dimension, overflow_index)) | |
1431 | return -EINVAL; | |
1432 | udimension = (struct lttng_kernel_abi_counter_dimension __user *)(unsigned long)kcounter_conf.dimension_array.ptr; | |
1433 | ret = lttng_copy_struct_from_user(&kdimension, sizeof(kdimension), udimension, len); | |
1434 | if (ret) | |
1435 | return ret; | |
1436 | ||
1437 | /* Validate flags */ | |
1438 | if (kdimension.flags & ~(LTTNG_KERNEL_ABI_COUNTER_DIMENSION_FLAG_UNDERFLOW | | |
1439 | LTTNG_KERNEL_ABI_COUNTER_DIMENSION_FLAG_OVERFLOW)) | |
1440 | return -EINVAL; | |
1441 | ||
1442 | dimension->flags |= (kdimension.flags & LTTNG_KERNEL_ABI_COUNTER_DIMENSION_FLAG_UNDERFLOW) ? | |
1443 | LTTNG_KERNEL_COUNTER_DIMENSION_FLAG_UNDERFLOW : 0; | |
1444 | dimension->flags |= (kdimension.flags & LTTNG_KERNEL_ABI_COUNTER_DIMENSION_FLAG_OVERFLOW) ? | |
1445 | LTTNG_KERNEL_COUNTER_DIMENSION_FLAG_OVERFLOW : 0; | |
1446 | dimension->size = kdimension.size; | |
1447 | dimension->underflow_index = kdimension.underflow_index; | |
1448 | dimension->overflow_index = kdimension.overflow_index; | |
1449 | return 0; | |
1450 | } | |
1451 | ||
baf20995 | 1452 | /** |
ad1c05e1 | 1453 | * lttng_session_ioctl - lttng session fd ioctl |
baf20995 | 1454 | * |
c0e31d2e | 1455 | * @file: the file |
baf20995 MD |
1456 | * @cmd: the command |
1457 | * @arg: command arg | |
1458 | * | |
1459 | * This ioctl implements lttng commands: | |
606828e4 | 1460 | * LTTNG_KERNEL_ABI_CHANNEL |
baf20995 | 1461 | * Returns a LTTng channel file descriptor |
606828e4 | 1462 | * LTTNG_KERNEL_ABI_ENABLE |
e64957da | 1463 | * Enables tracing for a session (weak enable) |
606828e4 | 1464 | * LTTNG_KERNEL_ABI_DISABLE |
e64957da | 1465 | * Disables tracing for a session (strong disable) |
606828e4 | 1466 | * LTTNG_KERNEL_ABI_METADATA |
8070f5c0 | 1467 | * Returns a LTTng metadata file descriptor |
606828e4 | 1468 | * LTTNG_KERNEL_ABI_SESSION_TRACK_PID |
d1f652f8 | 1469 | * Add PID to session PID tracker |
606828e4 | 1470 | * LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID |
d1f652f8 | 1471 | * Remove PID from session PID tracker |
606828e4 | 1472 | * LTTNG_KERNEL_ABI_SESSION_TRACK_ID |
d1f652f8 | 1473 | * Add ID to tracker |
606828e4 | 1474 | * LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID |
d1f652f8 | 1475 | * Remove ID from tracker |
ad1c05e1 MD |
1476 | * |
1477 | * The returned channel will be deleted when its file descriptor is closed. | |
1478 | */ | |
1479 | static | |
c0e31d2e | 1480 | long lttng_session_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
ad1c05e1 | 1481 | { |
8cdc1a81 | 1482 | struct lttng_kernel_session *session = file->private_data; |
606828e4 MD |
1483 | struct lttng_kernel_abi_channel chan_param; |
1484 | struct lttng_kernel_abi_old_channel old_chan_param; | |
81ab5b77 | 1485 | int ret; |
c0e31d2e | 1486 | |
8c71721f MD |
1487 | /* |
1488 | * Handle backward compatibility. OLD commands have wrong | |
1489 | * directions, replace them by the correct direction. | |
1490 | */ | |
1491 | switch (cmd) { | |
1492 | case LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_PID: | |
1493 | cmd = LTTNG_KERNEL_ABI_SESSION_TRACK_PID; | |
1494 | break; | |
1495 | case LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_PID: | |
1496 | cmd = LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID; | |
1497 | break; | |
1498 | case LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_ID: | |
1499 | cmd = LTTNG_KERNEL_ABI_SESSION_TRACK_ID; | |
1500 | break; | |
1501 | case LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_ID: | |
1502 | cmd = LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID; | |
1503 | break; | |
1504 | case LTTNG_KERNEL_ABI_OLD_SESSION_LIST_TRACKER_IDS: | |
1505 | cmd = LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_IDS; | |
1506 | break; | |
1507 | case LTTNG_KERNEL_ABI_OLD_SESSION_SET_NAME: | |
1508 | cmd = LTTNG_KERNEL_ABI_SESSION_SET_NAME; | |
1509 | break; | |
1510 | case LTTNG_KERNEL_ABI_OLD_SESSION_SET_CREATION_TIME: | |
1511 | cmd = LTTNG_KERNEL_ABI_SESSION_SET_CREATION_TIME; | |
1512 | break; | |
1513 | default: | |
1514 | /* Nothing to do. */ | |
1515 | break; | |
1516 | } | |
1517 | ||
ad1c05e1 | 1518 | switch (cmd) { |
606828e4 | 1519 | case LTTNG_KERNEL_ABI_OLD_CHANNEL: |
6dccd6c1 | 1520 | { |
6dccd6c1 | 1521 | if (copy_from_user(&old_chan_param, |
606828e4 MD |
1522 | (struct lttng_kernel_abi_old_channel __user *) arg, |
1523 | sizeof(struct lttng_kernel_abi_old_channel))) | |
6dccd6c1 JD |
1524 | return -EFAULT; |
1525 | chan_param.overwrite = old_chan_param.overwrite; | |
1526 | chan_param.subbuf_size = old_chan_param.subbuf_size; | |
1527 | chan_param.num_subbuf = old_chan_param.num_subbuf; | |
1528 | chan_param.switch_timer_interval = old_chan_param.switch_timer_interval; | |
1529 | chan_param.read_timer_interval = old_chan_param.read_timer_interval; | |
1530 | chan_param.output = old_chan_param.output; | |
1531 | ||
1532 | return lttng_abi_create_channel(file, &chan_param, | |
1533 | PER_CPU_CHANNEL); | |
1534 | } | |
606828e4 | 1535 | case LTTNG_KERNEL_ABI_CHANNEL: |
6dccd6c1 | 1536 | { |
6dccd6c1 | 1537 | if (copy_from_user(&chan_param, |
606828e4 MD |
1538 | (struct lttng_kernel_abi_channel __user *) arg, |
1539 | sizeof(struct lttng_kernel_abi_channel))) | |
6dccd6c1 JD |
1540 | return -EFAULT; |
1541 | return lttng_abi_create_channel(file, &chan_param, | |
5dbbdb43 | 1542 | PER_CPU_CHANNEL); |
6dccd6c1 | 1543 | } |
606828e4 MD |
1544 | case LTTNG_KERNEL_ABI_OLD_SESSION_START: |
1545 | case LTTNG_KERNEL_ABI_OLD_ENABLE: | |
1546 | case LTTNG_KERNEL_ABI_SESSION_START: | |
1547 | case LTTNG_KERNEL_ABI_ENABLE: | |
a90917c3 | 1548 | return lttng_session_enable(session); |
606828e4 MD |
1549 | case LTTNG_KERNEL_ABI_OLD_SESSION_STOP: |
1550 | case LTTNG_KERNEL_ABI_OLD_DISABLE: | |
1551 | case LTTNG_KERNEL_ABI_SESSION_STOP: | |
1552 | case LTTNG_KERNEL_ABI_DISABLE: | |
a90917c3 | 1553 | return lttng_session_disable(session); |
606828e4 | 1554 | case LTTNG_KERNEL_ABI_OLD_METADATA: |
6dccd6c1 | 1555 | { |
6dccd6c1 | 1556 | if (copy_from_user(&old_chan_param, |
606828e4 MD |
1557 | (struct lttng_kernel_abi_old_channel __user *) arg, |
1558 | sizeof(struct lttng_kernel_abi_old_channel))) | |
6dccd6c1 JD |
1559 | return -EFAULT; |
1560 | chan_param.overwrite = old_chan_param.overwrite; | |
1561 | chan_param.subbuf_size = old_chan_param.subbuf_size; | |
1562 | chan_param.num_subbuf = old_chan_param.num_subbuf; | |
1563 | chan_param.switch_timer_interval = old_chan_param.switch_timer_interval; | |
1564 | chan_param.read_timer_interval = old_chan_param.read_timer_interval; | |
1565 | chan_param.output = old_chan_param.output; | |
1566 | ||
1567 | return lttng_abi_create_channel(file, &chan_param, | |
1568 | METADATA_CHANNEL); | |
1569 | } | |
606828e4 | 1570 | case LTTNG_KERNEL_ABI_METADATA: |
6dccd6c1 | 1571 | { |
6dccd6c1 | 1572 | if (copy_from_user(&chan_param, |
606828e4 MD |
1573 | (struct lttng_kernel_abi_channel __user *) arg, |
1574 | sizeof(struct lttng_kernel_abi_channel))) | |
6dccd6c1 JD |
1575 | return -EFAULT; |
1576 | return lttng_abi_create_channel(file, &chan_param, | |
5dbbdb43 | 1577 | METADATA_CHANNEL); |
6dccd6c1 | 1578 | } |
606828e4 | 1579 | case LTTNG_KERNEL_ABI_SESSION_TRACK_PID: |
d1f652f8 | 1580 | return lttng_session_track_id(session, TRACKER_PID, (int) arg); |
606828e4 | 1581 | case LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID: |
d1f652f8 | 1582 | return lttng_session_untrack_id(session, TRACKER_PID, (int) arg); |
606828e4 | 1583 | case LTTNG_KERNEL_ABI_SESSION_TRACK_ID: |
d1f652f8 | 1584 | { |
606828e4 | 1585 | struct lttng_kernel_abi_tracker_args tracker; |
d1f652f8 MD |
1586 | enum tracker_type tracker_type; |
1587 | ||
1588 | if (copy_from_user(&tracker, | |
606828e4 MD |
1589 | (struct lttng_kernel_abi_tracker_args __user *) arg, |
1590 | sizeof(struct lttng_kernel_abi_tracker_args))) | |
d1f652f8 MD |
1591 | return -EFAULT; |
1592 | tracker_type = get_tracker_type(&tracker); | |
1593 | if (tracker_type == TRACKER_UNKNOWN) | |
1594 | return -EINVAL; | |
1595 | return lttng_session_track_id(session, tracker_type, tracker.id); | |
1596 | } | |
606828e4 | 1597 | case LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID: |
d1f652f8 | 1598 | { |
606828e4 | 1599 | struct lttng_kernel_abi_tracker_args tracker; |
d1f652f8 MD |
1600 | enum tracker_type tracker_type; |
1601 | ||
1602 | if (copy_from_user(&tracker, | |
606828e4 MD |
1603 | (struct lttng_kernel_abi_tracker_args __user *) arg, |
1604 | sizeof(struct lttng_kernel_abi_tracker_args))) | |
d1f652f8 MD |
1605 | return -EFAULT; |
1606 | tracker_type = get_tracker_type(&tracker); | |
1607 | if (tracker_type == TRACKER_UNKNOWN) | |
1608 | return -EINVAL; | |
1609 | return lttng_session_untrack_id(session, tracker_type, | |
1610 | tracker.id); | |
1611 | } | |
606828e4 | 1612 | case LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_PIDS: |
d1f652f8 | 1613 | return lttng_session_list_tracker_ids(session, TRACKER_PID); |
606828e4 | 1614 | case LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_IDS: |
d1f652f8 | 1615 | { |
606828e4 | 1616 | struct lttng_kernel_abi_tracker_args tracker; |
d1f652f8 MD |
1617 | enum tracker_type tracker_type; |
1618 | ||
1619 | if (copy_from_user(&tracker, | |
606828e4 MD |
1620 | (struct lttng_kernel_abi_tracker_args __user *) arg, |
1621 | sizeof(struct lttng_kernel_abi_tracker_args))) | |
d1f652f8 MD |
1622 | return -EFAULT; |
1623 | tracker_type = get_tracker_type(&tracker); | |
1624 | if (tracker_type == TRACKER_UNKNOWN) | |
1625 | return -EINVAL; | |
1626 | return lttng_session_list_tracker_ids(session, tracker_type); | |
1627 | } | |
606828e4 | 1628 | case LTTNG_KERNEL_ABI_SESSION_METADATA_REGEN: |
9616f0bf | 1629 | return lttng_session_metadata_regenerate(session); |
606828e4 | 1630 | case LTTNG_KERNEL_ABI_SESSION_STATEDUMP: |
601252cf | 1631 | return lttng_session_statedump(session); |
606828e4 | 1632 | case LTTNG_KERNEL_ABI_SESSION_SET_NAME: |
7f859fbf | 1633 | { |
606828e4 | 1634 | struct lttng_kernel_abi_session_name name; |
7f859fbf JR |
1635 | |
1636 | if (copy_from_user(&name, | |
606828e4 MD |
1637 | (struct lttng_kernel_abi_session_name __user *) arg, |
1638 | sizeof(struct lttng_kernel_abi_session_name))) | |
7f859fbf JR |
1639 | return -EFAULT; |
1640 | return lttng_abi_session_set_name(session, &name); | |
1641 | } | |
606828e4 | 1642 | case LTTNG_KERNEL_ABI_SESSION_SET_CREATION_TIME: |
1c88f269 | 1643 | { |
606828e4 | 1644 | struct lttng_kernel_abi_session_creation_time time; |
1c88f269 JR |
1645 | |
1646 | if (copy_from_user(&time, | |
606828e4 MD |
1647 | (struct lttng_kernel_abi_session_creation_time __user *) arg, |
1648 | sizeof(struct lttng_kernel_abi_session_creation_time))) | |
1c88f269 JR |
1649 | return -EFAULT; |
1650 | return lttng_abi_session_set_creation_time(session, &time); | |
1651 | } | |
81ab5b77 | 1652 | case LTTNG_KERNEL_ABI_COUNTER: |
2ff86ce2 | 1653 | { |
81ab5b77 | 1654 | struct lttng_kernel_counter_conf counter_conf; |
2ff86ce2 | 1655 | |
81ab5b77 MD |
1656 | ret = lttng_abi_copy_user_counter_conf(&counter_conf, |
1657 | (struct lttng_kernel_abi_counter_conf __user *) arg); | |
1658 | if (ret) | |
1659 | return ret; | |
2ff86ce2 MD |
1660 | return lttng_abi_session_create_counter(session, &counter_conf); |
1661 | } | |
ad1c05e1 MD |
1662 | default: |
1663 | return -ENOIOCTLCMD; | |
1664 | } | |
1665 | } | |
1666 | ||
03037b98 MD |
1667 | /* |
1668 | * Called when the last file reference is dropped. | |
1669 | * | |
1670 | * Big fat note: channels and events are invariant for the whole session after | |
1671 | * their creation. So this session destruction also destroys all channel and | |
1672 | * event structures specific to this session (they are not destroyed when their | |
1673 | * individual file is released). | |
1674 | */ | |
ad1c05e1 | 1675 | static |
03037b98 | 1676 | int lttng_session_release(struct inode *inode, struct file *file) |
ad1c05e1 | 1677 | { |
8cdc1a81 | 1678 | struct lttng_kernel_session *session = file->private_data; |
c269fff4 MD |
1679 | |
1680 | if (session) | |
a90917c3 | 1681 | lttng_session_destroy(session); |
11b5a3c2 | 1682 | return 0; |
ad1c05e1 | 1683 | } |
ad1c05e1 MD |
1684 | |
1685 | static const struct file_operations lttng_session_fops = { | |
a33c9927 | 1686 | .owner = THIS_MODULE, |
03037b98 | 1687 | .release = lttng_session_release, |
ad1c05e1 MD |
1688 | .unlocked_ioctl = lttng_session_ioctl, |
1689 | #ifdef CONFIG_COMPAT | |
03037b98 | 1690 | .compat_ioctl = lttng_session_ioctl, |
ad1c05e1 | 1691 | #endif |
11b5a3c2 | 1692 | }; |
ad1c05e1 | 1693 | |
db2511b4 MD |
1694 | /* |
1695 | * When encountering empty buffer, flush current sub-buffer if non-empty | |
1696 | * and retry (if new data available to read after flush). | |
1697 | */ | |
1698 | static | |
1699 | ssize_t lttng_event_notifier_group_notif_read(struct file *filp, char __user *user_buf, | |
1700 | size_t count, loff_t *ppos) | |
1701 | { | |
1702 | struct lttng_event_notifier_group *event_notifier_group = filp->private_data; | |
860c213b | 1703 | struct lttng_kernel_ring_buffer_channel *chan = event_notifier_group->chan; |
e20c0fec | 1704 | struct lttng_kernel_ring_buffer *buf = event_notifier_group->buf; |
db2511b4 MD |
1705 | ssize_t read_count = 0, len; |
1706 | size_t read_offset; | |
1707 | ||
1708 | might_sleep(); | |
1709 | if (!lttng_access_ok(VERIFY_WRITE, user_buf, count)) | |
1710 | return -EFAULT; | |
1711 | ||
1712 | /* Finish copy of previous record */ | |
1713 | if (*ppos != 0) { | |
08c43e0d | 1714 | if (count != 0) { |
db2511b4 MD |
1715 | len = chan->iter.len_left; |
1716 | read_offset = *ppos; | |
1717 | goto skip_get_next; | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | while (read_count < count) { | |
1722 | size_t copy_len, space_left; | |
1723 | ||
1724 | len = lib_ring_buffer_get_next_record(chan, buf); | |
1725 | len_test: | |
1726 | if (len < 0) { | |
1727 | /* | |
1728 | * Check if buffer is finalized (end of file). | |
1729 | */ | |
1730 | if (len == -ENODATA) { | |
1731 | /* A 0 read_count will tell about end of file */ | |
1732 | goto nodata; | |
1733 | } | |
1734 | if (filp->f_flags & O_NONBLOCK) { | |
1735 | if (!read_count) | |
1736 | read_count = -EAGAIN; | |
1737 | goto nodata; | |
1738 | } else { | |
1739 | int error; | |
1740 | ||
1741 | /* | |
1742 | * No data available at the moment, return what | |
1743 | * we got. | |
1744 | */ | |
1745 | if (read_count) | |
1746 | goto nodata; | |
1747 | ||
1748 | /* | |
1749 | * Wait for returned len to be >= 0 or -ENODATA. | |
1750 | */ | |
1751 | error = wait_event_interruptible( | |
1752 | event_notifier_group->read_wait, | |
1753 | ((len = lib_ring_buffer_get_next_record( | |
1754 | chan, buf)), len != -EAGAIN)); | |
1755 | CHAN_WARN_ON(chan, len == -EBUSY); | |
1756 | if (error) { | |
1757 | read_count = error; | |
1758 | goto nodata; | |
1759 | } | |
1760 | CHAN_WARN_ON(chan, len < 0 && len != -ENODATA); | |
1761 | goto len_test; | |
1762 | } | |
1763 | } | |
1764 | read_offset = buf->iter.read_offset; | |
1765 | skip_get_next: | |
1766 | space_left = count - read_count; | |
1767 | if (len <= space_left) { | |
1768 | copy_len = len; | |
1769 | chan->iter.len_left = 0; | |
1770 | *ppos = 0; | |
1771 | } else { | |
1772 | copy_len = space_left; | |
1773 | chan->iter.len_left = len - copy_len; | |
1774 | *ppos = read_offset + copy_len; | |
1775 | } | |
1776 | if (__lib_ring_buffer_copy_to_user(&buf->backend, read_offset, | |
1777 | &user_buf[read_count], | |
1778 | copy_len)) { | |
1779 | /* | |
1780 | * Leave the len_left and ppos values at their current | |
1781 | * state, as we currently have a valid event to read. | |
1782 | */ | |
1783 | return -EFAULT; | |
1784 | } | |
1785 | read_count += copy_len; | |
1786 | } | |
31c02fb7 | 1787 | goto put_record; |
db2511b4 MD |
1788 | |
1789 | nodata: | |
1790 | *ppos = 0; | |
1791 | chan->iter.len_left = 0; | |
31c02fb7 MD |
1792 | |
1793 | put_record: | |
08c43e0d MD |
1794 | if (*ppos == 0) |
1795 | lib_ring_buffer_put_current_record(buf); | |
db2511b4 MD |
1796 | return read_count; |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * If the ring buffer is non empty (even just a partial subbuffer), return that | |
1801 | * there is data available. Perform a ring buffer flush if we encounter a | |
1802 | * non-empty ring buffer which does not have any consumeable subbuffer available. | |
1803 | */ | |
1804 | static | |
1805 | unsigned int lttng_event_notifier_group_notif_poll(struct file *filp, | |
1806 | poll_table *wait) | |
1807 | { | |
1808 | unsigned int mask = 0; | |
1809 | struct lttng_event_notifier_group *event_notifier_group = filp->private_data; | |
860c213b | 1810 | struct lttng_kernel_ring_buffer_channel *chan = event_notifier_group->chan; |
e20c0fec MD |
1811 | struct lttng_kernel_ring_buffer *buf = event_notifier_group->buf; |
1812 | const struct lttng_kernel_ring_buffer_config *config = &chan->backend.config; | |
db2511b4 MD |
1813 | int finalized, disabled; |
1814 | unsigned long consumed, offset; | |
18f12d55 | 1815 | size_t subbuffer_header_size = config->cb.subbuffer_header_size(); |
db2511b4 MD |
1816 | |
1817 | if (filp->f_mode & FMODE_READ) { | |
1818 | poll_wait_set_exclusive(wait); | |
1819 | poll_wait(filp, &event_notifier_group->read_wait, wait); | |
1820 | ||
1821 | finalized = lib_ring_buffer_is_finalized(config, buf); | |
1822 | disabled = lib_ring_buffer_channel_is_disabled(chan); | |
1823 | ||
1824 | /* | |
1825 | * lib_ring_buffer_is_finalized() contains a smp_rmb() ordering | |
1826 | * finalized load before offsets loads. | |
1827 | */ | |
1828 | WARN_ON(atomic_long_read(&buf->active_readers) != 1); | |
1829 | retry: | |
1830 | if (disabled) | |
1831 | return POLLERR; | |
1832 | ||
1833 | offset = lib_ring_buffer_get_offset(config, buf); | |
1834 | consumed = lib_ring_buffer_get_consumed(config, buf); | |
1835 | ||
1836 | /* | |
1837 | * If there is no buffer available to consume. | |
1838 | */ | |
1839 | if (subbuf_trunc(offset, chan) - subbuf_trunc(consumed, chan) == 0) { | |
1840 | /* | |
1841 | * If there is a non-empty subbuffer, flush and try again. | |
1842 | */ | |
18f12d55 | 1843 | if (subbuf_offset(offset, chan) > subbuffer_header_size) { |
db2511b4 MD |
1844 | lib_ring_buffer_switch_remote(buf); |
1845 | goto retry; | |
1846 | } | |
1847 | ||
1848 | if (finalized) | |
1849 | return POLLHUP; | |
1850 | else { | |
1851 | /* | |
1852 | * The memory barriers | |
1853 | * __wait_event()/wake_up_interruptible() take | |
1854 | * care of "raw_spin_is_locked" memory ordering. | |
1855 | */ | |
1856 | if (raw_spin_is_locked(&buf->raw_tick_nohz_spinlock)) | |
1857 | goto retry; | |
1858 | else | |
1859 | return 0; | |
1860 | } | |
1861 | } else { | |
1862 | if (subbuf_trunc(offset, chan) - subbuf_trunc(consumed, chan) | |
1863 | >= chan->backend.buf_size) | |
1864 | return POLLPRI | POLLRDBAND; | |
1865 | else | |
1866 | return POLLIN | POLLRDNORM; | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | return mask; | |
1871 | } | |
1872 | ||
1873 | /** | |
1874 | * lttng_event_notifier_group_notif_open - event_notifier ring buffer open file operation | |
1875 | * @inode: opened inode | |
1876 | * @file: opened file | |
1877 | * | |
1878 | * Open implementation. Makes sure only one open instance of a buffer is | |
1879 | * done at a given moment. | |
1880 | */ | |
1881 | static int lttng_event_notifier_group_notif_open(struct inode *inode, struct file *file) | |
1882 | { | |
1883 | struct lttng_event_notifier_group *event_notifier_group = inode->i_private; | |
e20c0fec | 1884 | struct lttng_kernel_ring_buffer *buf = event_notifier_group->buf; |
db2511b4 MD |
1885 | |
1886 | file->private_data = event_notifier_group; | |
1887 | return lib_ring_buffer_open(inode, file, buf); | |
1888 | } | |
1889 | ||
1890 | /** | |
1891 | * lttng_event_notifier_group_notif_release - event_notifier ring buffer release file operation | |
1892 | * @inode: opened inode | |
1893 | * @file: opened file | |
1894 | * | |
1895 | * Release implementation. | |
1896 | */ | |
1897 | static int lttng_event_notifier_group_notif_release(struct inode *inode, struct file *file) | |
1898 | { | |
1899 | struct lttng_event_notifier_group *event_notifier_group = file->private_data; | |
e20c0fec | 1900 | struct lttng_kernel_ring_buffer *buf = event_notifier_group->buf; |
db2511b4 MD |
1901 | int ret; |
1902 | ||
1903 | ret = lib_ring_buffer_release(inode, file, buf); | |
1904 | if (ret) | |
1905 | return ret; | |
1906 | fput(event_notifier_group->file); | |
1907 | return 0; | |
1908 | } | |
1909 | ||
21f58fb7 FD |
1910 | static const struct file_operations lttng_event_notifier_group_notif_fops = { |
1911 | .owner = THIS_MODULE, | |
db2511b4 MD |
1912 | .open = lttng_event_notifier_group_notif_open, |
1913 | .release = lttng_event_notifier_group_notif_release, | |
1914 | .read = lttng_event_notifier_group_notif_read, | |
1915 | .poll = lttng_event_notifier_group_notif_poll, | |
21f58fb7 FD |
1916 | }; |
1917 | ||
d83004aa JD |
1918 | /** |
1919 | * lttng_metadata_ring_buffer_poll - LTTng ring buffer poll file operation | |
1920 | * @filp: the file | |
1921 | * @wait: poll table | |
1922 | * | |
1923 | * Handles the poll operations for the metadata channels. | |
1924 | */ | |
ad1c05e1 | 1925 | static |
d83004aa JD |
1926 | unsigned int lttng_metadata_ring_buffer_poll(struct file *filp, |
1927 | poll_table *wait) | |
1928 | { | |
1929 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 1930 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
d83004aa JD |
1931 | int finalized; |
1932 | unsigned int mask = 0; | |
1933 | ||
1934 | if (filp->f_mode & FMODE_READ) { | |
1935 | poll_wait_set_exclusive(wait); | |
1936 | poll_wait(filp, &stream->read_wait, wait); | |
1937 | ||
1938 | finalized = stream->finalized; | |
1939 | ||
1940 | /* | |
1941 | * lib_ring_buffer_is_finalized() contains a smp_rmb() | |
1942 | * ordering finalized load before offsets loads. | |
1943 | */ | |
1944 | WARN_ON(atomic_long_read(&buf->active_readers) != 1); | |
1945 | ||
1946 | if (finalized) | |
1947 | mask |= POLLHUP; | |
1948 | ||
92d9f5e6 | 1949 | mutex_lock(&stream->metadata_cache->lock); |
d83004aa | 1950 | if (stream->metadata_cache->metadata_written > |
f613e3e6 | 1951 | stream->metadata_out) |
d83004aa | 1952 | mask |= POLLIN; |
92d9f5e6 | 1953 | mutex_unlock(&stream->metadata_cache->lock); |
d83004aa JD |
1954 | } |
1955 | ||
1956 | return mask; | |
1957 | } | |
1958 | ||
f613e3e6 MD |
1959 | static |
1960 | void lttng_metadata_ring_buffer_ioctl_put_next_subbuf(struct file *filp, | |
1961 | unsigned int cmd, unsigned long arg) | |
1962 | { | |
1963 | struct lttng_metadata_stream *stream = filp->private_data; | |
1964 | ||
1965 | stream->metadata_out = stream->metadata_in; | |
1966 | } | |
1967 | ||
d1344afa JD |
1968 | /* |
1969 | * Reset the counter of how much metadata has been consumed to 0. That way, | |
1970 | * the consumer receives the content of the metadata cache unchanged. This is | |
1971 | * different from the metadata_regenerate where the offset from epoch is | |
1972 | * resampled, here we want the exact same content as the last time the metadata | |
1973 | * was generated. This command is only possible if all the metadata written | |
1974 | * in the cache has been output to the metadata stream to avoid corrupting the | |
1975 | * metadata file. | |
1976 | * | |
1977 | * Return 0 on success, a negative value on error. | |
1978 | */ | |
1979 | static | |
1980 | int lttng_metadata_cache_dump(struct lttng_metadata_stream *stream) | |
1981 | { | |
1982 | int ret; | |
1983 | struct lttng_metadata_cache *cache = stream->metadata_cache; | |
1984 | ||
1985 | mutex_lock(&cache->lock); | |
1986 | if (stream->metadata_out != cache->metadata_written) { | |
1987 | ret = -EBUSY; | |
1988 | goto end; | |
1989 | } | |
1990 | stream->metadata_out = 0; | |
1991 | stream->metadata_in = 0; | |
1992 | wake_up_interruptible(&stream->read_wait); | |
1993 | ret = 0; | |
1994 | ||
1995 | end: | |
1996 | mutex_unlock(&cache->lock); | |
1997 | return ret; | |
1998 | } | |
1999 | ||
d83004aa JD |
2000 | static |
2001 | long lttng_metadata_ring_buffer_ioctl(struct file *filp, | |
2002 | unsigned int cmd, unsigned long arg) | |
2003 | { | |
2004 | int ret; | |
2005 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2006 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
8b97fd42 MD |
2007 | unsigned int rb_cmd; |
2008 | bool coherent; | |
2009 | ||
606828e4 MD |
2010 | if (cmd == LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK) |
2011 | rb_cmd = LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF; | |
8b97fd42 MD |
2012 | else |
2013 | rb_cmd = cmd; | |
d83004aa JD |
2014 | |
2015 | switch (cmd) { | |
606828e4 | 2016 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF: |
d83004aa | 2017 | { |
35097f36 | 2018 | struct lttng_metadata_stream *stream = filp->private_data; |
e20c0fec | 2019 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2020 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
35097f36 | 2021 | |
8b97fd42 | 2022 | ret = lttng_metadata_output_channel(stream, chan, NULL); |
35097f36 JD |
2023 | if (ret > 0) { |
2024 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE); | |
2025 | ret = 0; | |
2026 | } else if (ret < 0) | |
d83004aa JD |
2027 | goto err; |
2028 | break; | |
2029 | } | |
606828e4 | 2030 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF: |
f613e3e6 MD |
2031 | { |
2032 | /* | |
2033 | * Random access is not allowed for metadata channel. | |
2034 | */ | |
2035 | return -ENOSYS; | |
2036 | } | |
c190d76e MJ |
2037 | case LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH_EMPTY: |
2038 | lttng_fallthrough; | |
606828e4 | 2039 | case LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH: |
35097f36 JD |
2040 | { |
2041 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2042 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2043 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
35097f36 JD |
2044 | |
2045 | /* | |
2046 | * Before doing the actual ring buffer flush, write up to one | |
2047 | * packet of metadata in the ring buffer. | |
2048 | */ | |
8b97fd42 | 2049 | ret = lttng_metadata_output_channel(stream, chan, NULL); |
35097f36 JD |
2050 | if (ret < 0) |
2051 | goto err; | |
2052 | break; | |
2053 | } | |
606828e4 | 2054 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_METADATA_VERSION: |
9616f0bf JD |
2055 | { |
2056 | struct lttng_metadata_stream *stream = filp->private_data; | |
2057 | ||
2058 | return put_u64(stream->version, arg); | |
2059 | } | |
606828e4 | 2060 | case LTTNG_KERNEL_ABI_RING_BUFFER_METADATA_CACHE_DUMP: |
d1344afa JD |
2061 | { |
2062 | struct lttng_metadata_stream *stream = filp->private_data; | |
2063 | ||
2064 | return lttng_metadata_cache_dump(stream); | |
2065 | } | |
606828e4 | 2066 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK: |
8b97fd42 MD |
2067 | { |
2068 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2069 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2070 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
8b97fd42 MD |
2071 | |
2072 | ret = lttng_metadata_output_channel(stream, chan, &coherent); | |
2073 | if (ret > 0) { | |
2074 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE); | |
2075 | ret = 0; | |
2076 | } else if (ret < 0) { | |
2077 | goto err; | |
2078 | } | |
2079 | break; | |
2080 | } | |
d83004aa JD |
2081 | default: |
2082 | break; | |
2083 | } | |
f613e3e6 MD |
2084 | /* PUT_SUBBUF is the one from lib ring buffer, unmodified. */ |
2085 | ||
d83004aa | 2086 | /* Performing lib ring buffer ioctl after our own. */ |
8b97fd42 | 2087 | ret = lib_ring_buffer_ioctl(filp, rb_cmd, arg, buf); |
f613e3e6 MD |
2088 | if (ret < 0) |
2089 | goto err; | |
d83004aa | 2090 | |
f613e3e6 | 2091 | switch (cmd) { |
606828e4 | 2092 | case LTTNG_KERNEL_ABI_RING_BUFFER_PUT_NEXT_SUBBUF: |
f613e3e6 MD |
2093 | { |
2094 | lttng_metadata_ring_buffer_ioctl_put_next_subbuf(filp, | |
2095 | cmd, arg); | |
2096 | break; | |
2097 | } | |
606828e4 | 2098 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK: |
8b97fd42 MD |
2099 | { |
2100 | return put_u32(coherent, arg); | |
2101 | } | |
f613e3e6 MD |
2102 | default: |
2103 | break; | |
2104 | } | |
d83004aa JD |
2105 | err: |
2106 | return ret; | |
2107 | } | |
2108 | ||
aeb9064d | 2109 | #ifdef CONFIG_COMPAT |
d83004aa JD |
2110 | static |
2111 | long lttng_metadata_ring_buffer_compat_ioctl(struct file *filp, | |
2112 | unsigned int cmd, unsigned long arg) | |
2113 | { | |
2114 | int ret; | |
2115 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2116 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
8b97fd42 MD |
2117 | unsigned int rb_cmd; |
2118 | bool coherent; | |
2119 | ||
606828e4 MD |
2120 | if (cmd == LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK) |
2121 | rb_cmd = LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF; | |
8b97fd42 MD |
2122 | else |
2123 | rb_cmd = cmd; | |
d83004aa JD |
2124 | |
2125 | switch (cmd) { | |
606828e4 | 2126 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF: |
d83004aa | 2127 | { |
35097f36 | 2128 | struct lttng_metadata_stream *stream = filp->private_data; |
e20c0fec | 2129 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2130 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
35097f36 | 2131 | |
8b97fd42 | 2132 | ret = lttng_metadata_output_channel(stream, chan, NULL); |
35097f36 JD |
2133 | if (ret > 0) { |
2134 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE); | |
2135 | ret = 0; | |
2136 | } else if (ret < 0) | |
d83004aa JD |
2137 | goto err; |
2138 | break; | |
2139 | } | |
606828e4 | 2140 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF: |
f613e3e6 MD |
2141 | { |
2142 | /* | |
2143 | * Random access is not allowed for metadata channel. | |
2144 | */ | |
2145 | return -ENOSYS; | |
2146 | } | |
c190d76e MJ |
2147 | case LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH_EMPTY: |
2148 | lttng_fallthrough; | |
606828e4 | 2149 | case LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH: |
96c55c2f MD |
2150 | { |
2151 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2152 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2153 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
96c55c2f MD |
2154 | |
2155 | /* | |
2156 | * Before doing the actual ring buffer flush, write up to one | |
2157 | * packet of metadata in the ring buffer. | |
2158 | */ | |
8b97fd42 | 2159 | ret = lttng_metadata_output_channel(stream, chan, NULL); |
96c55c2f MD |
2160 | if (ret < 0) |
2161 | goto err; | |
2162 | break; | |
2163 | } | |
606828e4 | 2164 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_METADATA_VERSION: |
96c55c2f MD |
2165 | { |
2166 | struct lttng_metadata_stream *stream = filp->private_data; | |
2167 | ||
2168 | return put_u64(stream->version, arg); | |
2169 | } | |
606828e4 | 2170 | case LTTNG_KERNEL_ABI_RING_BUFFER_METADATA_CACHE_DUMP: |
d1344afa JD |
2171 | { |
2172 | struct lttng_metadata_stream *stream = filp->private_data; | |
2173 | ||
2174 | return lttng_metadata_cache_dump(stream); | |
2175 | } | |
606828e4 | 2176 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK: |
8b97fd42 MD |
2177 | { |
2178 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2179 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
860c213b | 2180 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
8b97fd42 MD |
2181 | |
2182 | ret = lttng_metadata_output_channel(stream, chan, &coherent); | |
2183 | if (ret > 0) { | |
2184 | lib_ring_buffer_switch_slow(buf, SWITCH_ACTIVE); | |
2185 | ret = 0; | |
2186 | } else if (ret < 0) { | |
2187 | goto err; | |
2188 | } | |
2189 | break; | |
2190 | } | |
d83004aa JD |
2191 | default: |
2192 | break; | |
2193 | } | |
f613e3e6 MD |
2194 | /* PUT_SUBBUF is the one from lib ring buffer, unmodified. */ |
2195 | ||
d83004aa | 2196 | /* Performing lib ring buffer ioctl after our own. */ |
8b97fd42 | 2197 | ret = lib_ring_buffer_compat_ioctl(filp, rb_cmd, arg, buf); |
f613e3e6 MD |
2198 | if (ret < 0) |
2199 | goto err; | |
d83004aa | 2200 | |
f613e3e6 | 2201 | switch (cmd) { |
606828e4 | 2202 | case LTTNG_KERNEL_ABI_RING_BUFFER_PUT_NEXT_SUBBUF: |
f613e3e6 MD |
2203 | { |
2204 | lttng_metadata_ring_buffer_ioctl_put_next_subbuf(filp, | |
2205 | cmd, arg); | |
2206 | break; | |
2207 | } | |
606828e4 | 2208 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK: |
8b97fd42 MD |
2209 | { |
2210 | return put_u32(coherent, arg); | |
2211 | } | |
f613e3e6 MD |
2212 | default: |
2213 | break; | |
2214 | } | |
d83004aa JD |
2215 | err: |
2216 | return ret; | |
2217 | } | |
aeb9064d | 2218 | #endif |
d83004aa | 2219 | |
b3b8072b MD |
2220 | /* |
2221 | * This is not used by anonymous file descriptors. This code is left | |
2222 | * there if we ever want to implement an inode with open() operation. | |
2223 | */ | |
d83004aa JD |
2224 | static |
2225 | int lttng_metadata_ring_buffer_open(struct inode *inode, struct file *file) | |
2226 | { | |
2227 | struct lttng_metadata_stream *stream = inode->i_private; | |
e20c0fec | 2228 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
d83004aa JD |
2229 | |
2230 | file->private_data = buf; | |
b3b8072b MD |
2231 | /* |
2232 | * Since life-time of metadata cache differs from that of | |
2233 | * session, we need to keep our own reference on the transport. | |
2234 | */ | |
2235 | if (!try_module_get(stream->transport->owner)) { | |
5a15f70c | 2236 | printk(KERN_WARNING "LTTng: Can't lock transport module.\n"); |
b3b8072b MD |
2237 | return -EBUSY; |
2238 | } | |
d83004aa JD |
2239 | return lib_ring_buffer_open(inode, file, buf); |
2240 | } | |
2241 | ||
2242 | static | |
2243 | int lttng_metadata_ring_buffer_release(struct inode *inode, struct file *file) | |
2244 | { | |
2245 | struct lttng_metadata_stream *stream = file->private_data; | |
e20c0fec | 2246 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
d83004aa | 2247 | |
92143b2c | 2248 | mutex_lock(&stream->metadata_cache->lock); |
94ac1e17 | 2249 | list_del(&stream->node); |
92143b2c | 2250 | mutex_unlock(&stream->metadata_cache->lock); |
d83004aa | 2251 | kref_put(&stream->metadata_cache->refcount, metadata_cache_destroy); |
b3b8072b | 2252 | module_put(stream->transport->owner); |
92143b2c | 2253 | kfree(stream); |
d83004aa JD |
2254 | return lib_ring_buffer_release(inode, file, buf); |
2255 | } | |
2256 | ||
2257 | static | |
2258 | ssize_t lttng_metadata_ring_buffer_splice_read(struct file *in, loff_t *ppos, | |
2259 | struct pipe_inode_info *pipe, size_t len, | |
2260 | unsigned int flags) | |
2261 | { | |
2262 | struct lttng_metadata_stream *stream = in->private_data; | |
e20c0fec | 2263 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
d83004aa JD |
2264 | |
2265 | return lib_ring_buffer_splice_read(in, ppos, pipe, len, | |
2266 | flags, buf); | |
2267 | } | |
2268 | ||
2269 | static | |
2270 | int lttng_metadata_ring_buffer_mmap(struct file *filp, | |
2271 | struct vm_area_struct *vma) | |
2272 | { | |
2273 | struct lttng_metadata_stream *stream = filp->private_data; | |
e20c0fec | 2274 | struct lttng_kernel_ring_buffer *buf = stream->priv; |
d83004aa JD |
2275 | |
2276 | return lib_ring_buffer_mmap(filp, vma, buf); | |
2277 | } | |
2278 | ||
2279 | static | |
2280 | const struct file_operations lttng_metadata_ring_buffer_file_operations = { | |
2281 | .owner = THIS_MODULE, | |
2282 | .open = lttng_metadata_ring_buffer_open, | |
2283 | .release = lttng_metadata_ring_buffer_release, | |
2284 | .poll = lttng_metadata_ring_buffer_poll, | |
2285 | .splice_read = lttng_metadata_ring_buffer_splice_read, | |
2286 | .mmap = lttng_metadata_ring_buffer_mmap, | |
2287 | .unlocked_ioctl = lttng_metadata_ring_buffer_ioctl, | |
2288 | .llseek = vfs_lib_ring_buffer_no_llseek, | |
2289 | #ifdef CONFIG_COMPAT | |
2290 | .compat_ioctl = lttng_metadata_ring_buffer_compat_ioctl, | |
2291 | #endif | |
2292 | }; | |
2293 | ||
2294 | static | |
2295 | int lttng_abi_create_stream_fd(struct file *channel_file, void *stream_priv, | |
a3fcd499 | 2296 | const struct file_operations *fops, const char *name) |
ad1c05e1 | 2297 | { |
ad1c05e1 | 2298 | int stream_fd, ret; |
11b5a3c2 | 2299 | struct file *stream_file; |
ad1c05e1 | 2300 | |
2a059b14 | 2301 | stream_fd = get_unused_fd_flags(0); |
ad1c05e1 MD |
2302 | if (stream_fd < 0) { |
2303 | ret = stream_fd; | |
2304 | goto fd_error; | |
2305 | } | |
a3fcd499 | 2306 | stream_file = anon_inode_getfile(name, fops, stream_priv, O_RDWR); |
c0e31d2e MD |
2307 | if (IS_ERR(stream_file)) { |
2308 | ret = PTR_ERR(stream_file); | |
ad1c05e1 MD |
2309 | goto file_error; |
2310 | } | |
409453cb MD |
2311 | /* |
2312 | * OPEN_FMODE, called within anon_inode_getfile/alloc_file, don't honor | |
2313 | * FMODE_LSEEK, FMODE_PREAD nor FMODE_PWRITE. We need to read from this | |
2314 | * file descriptor, so we set FMODE_PREAD here. | |
2315 | */ | |
d7b6f197 | 2316 | stream_file->f_mode |= FMODE_PREAD; |
c0e31d2e | 2317 | fd_install(stream_fd, stream_file); |
dda6a249 MD |
2318 | /* |
2319 | * The stream holds a reference to the channel within the generic ring | |
2320 | * buffer library, so no need to hold a refcount on the channel and | |
2321 | * session files here. | |
2322 | */ | |
ad1c05e1 MD |
2323 | return stream_fd; |
2324 | ||
2325 | file_error: | |
2326 | put_unused_fd(stream_fd); | |
d83004aa JD |
2327 | fd_error: |
2328 | return ret; | |
2329 | } | |
2330 | ||
2331 | static | |
2332 | int lttng_abi_open_stream(struct file *channel_file) | |
2333 | { | |
f7d06400 | 2334 | struct lttng_kernel_channel_buffer *channel = channel_file->private_data; |
e20c0fec | 2335 | struct lttng_kernel_ring_buffer *buf; |
d83004aa JD |
2336 | int ret; |
2337 | void *stream_priv; | |
2338 | ||
f7d06400 | 2339 | buf = channel->ops->priv->buffer_read_open(channel->priv->rb_chan); |
d83004aa JD |
2340 | if (!buf) |
2341 | return -ENOENT; | |
2342 | ||
2343 | stream_priv = buf; | |
2344 | ret = lttng_abi_create_stream_fd(channel_file, stream_priv, | |
a3fcd499 MD |
2345 | <tng_stream_ring_buffer_file_operations, |
2346 | "[lttng_stream]"); | |
d83004aa JD |
2347 | if (ret < 0) |
2348 | goto fd_error; | |
2349 | ||
2350 | return ret; | |
2351 | ||
2352 | fd_error: | |
4a399b76 | 2353 | channel->ops->priv->buffer_read_close(buf); |
d83004aa JD |
2354 | return ret; |
2355 | } | |
2356 | ||
2357 | static | |
2358 | int lttng_abi_open_metadata_stream(struct file *channel_file) | |
2359 | { | |
f7d06400 MD |
2360 | struct lttng_kernel_channel_buffer *channel = channel_file->private_data; |
2361 | struct lttng_kernel_session *session = channel->parent.session; | |
e20c0fec | 2362 | struct lttng_kernel_ring_buffer *buf; |
d83004aa JD |
2363 | int ret; |
2364 | struct lttng_metadata_stream *metadata_stream; | |
2365 | void *stream_priv; | |
2366 | ||
f7d06400 | 2367 | buf = channel->ops->priv->buffer_read_open(channel->priv->rb_chan); |
d83004aa JD |
2368 | if (!buf) |
2369 | return -ENOENT; | |
2370 | ||
2371 | metadata_stream = kzalloc(sizeof(struct lttng_metadata_stream), | |
2372 | GFP_KERNEL); | |
b3b8072b MD |
2373 | if (!metadata_stream) { |
2374 | ret = -ENOMEM; | |
2375 | goto nomem; | |
2376 | } | |
8cdc1a81 | 2377 | metadata_stream->metadata_cache = session->priv->metadata_cache; |
d83004aa JD |
2378 | init_waitqueue_head(&metadata_stream->read_wait); |
2379 | metadata_stream->priv = buf; | |
2380 | stream_priv = metadata_stream; | |
f7d06400 | 2381 | metadata_stream->transport = channel->priv->transport; |
8b97fd42 MD |
2382 | /* Initial state is an empty metadata, considered as incoherent. */ |
2383 | metadata_stream->coherent = false; | |
b3b8072b MD |
2384 | |
2385 | /* | |
2386 | * Since life-time of metadata cache differs from that of | |
2387 | * session, we need to keep our own reference on the transport. | |
2388 | */ | |
2389 | if (!try_module_get(metadata_stream->transport->owner)) { | |
5a15f70c | 2390 | printk(KERN_WARNING "LTTng: Can't lock transport module.\n"); |
b3b8072b MD |
2391 | ret = -EINVAL; |
2392 | goto notransport; | |
2393 | } | |
2394 | ||
8cdc1a81 | 2395 | if (!lttng_kref_get(&session->priv->metadata_cache->refcount)) { |
901aaa5f | 2396 | ret = -EOVERFLOW; |
9c1f4643 | 2397 | goto kref_error; |
901aaa5f FD |
2398 | } |
2399 | ||
d83004aa | 2400 | ret = lttng_abi_create_stream_fd(channel_file, stream_priv, |
a3fcd499 MD |
2401 | <tng_metadata_ring_buffer_file_operations, |
2402 | "[lttng_metadata_stream]"); | |
d83004aa JD |
2403 | if (ret < 0) |
2404 | goto fd_error; | |
2405 | ||
8cdc1a81 | 2406 | mutex_lock(&session->priv->metadata_cache->lock); |
94ac1e17 | 2407 | list_add(&metadata_stream->node, |
8cdc1a81 MD |
2408 | &session->priv->metadata_cache->metadata_stream); |
2409 | mutex_unlock(&session->priv->metadata_cache->lock); | |
d83004aa JD |
2410 | return ret; |
2411 | ||
ad1c05e1 | 2412 | fd_error: |
8cdc1a81 | 2413 | kref_put(&session->priv->metadata_cache->refcount, metadata_cache_destroy); |
9c1f4643 | 2414 | kref_error: |
b3b8072b MD |
2415 | module_put(metadata_stream->transport->owner); |
2416 | notransport: | |
2417 | kfree(metadata_stream); | |
2418 | nomem: | |
4a399b76 | 2419 | channel->ops->priv->buffer_read_close(buf); |
ad1c05e1 MD |
2420 | return ret; |
2421 | } | |
2422 | ||
21f58fb7 FD |
2423 | static |
2424 | int lttng_abi_open_event_notifier_group_stream(struct file *notif_file) | |
2425 | { | |
2426 | struct lttng_event_notifier_group *event_notifier_group = notif_file->private_data; | |
860c213b | 2427 | struct lttng_kernel_ring_buffer_channel *chan = event_notifier_group->chan; |
e20c0fec | 2428 | struct lttng_kernel_ring_buffer *buf; |
21f58fb7 FD |
2429 | int ret; |
2430 | void *stream_priv; | |
2431 | ||
4a399b76 | 2432 | buf = event_notifier_group->ops->priv->buffer_read_open(chan); |
21f58fb7 FD |
2433 | if (!buf) |
2434 | return -ENOENT; | |
2435 | ||
2436 | /* The event_notifier notification fd holds a reference on the event_notifier group */ | |
2437 | if (!atomic_long_add_unless(¬if_file->f_count, 1, LONG_MAX)) { | |
2438 | ret = -EOVERFLOW; | |
2439 | goto refcount_error; | |
2440 | } | |
2441 | event_notifier_group->buf = buf; | |
2442 | stream_priv = event_notifier_group; | |
2443 | ret = lttng_abi_create_stream_fd(notif_file, stream_priv, | |
2444 | <tng_event_notifier_group_notif_fops, | |
2445 | "[lttng_event_notifier_stream]"); | |
2446 | if (ret < 0) | |
2447 | goto fd_error; | |
2448 | ||
2449 | return ret; | |
2450 | ||
2451 | fd_error: | |
2452 | atomic_long_dec(¬if_file->f_count); | |
2453 | refcount_error: | |
4a399b76 | 2454 | event_notifier_group->ops->priv->buffer_read_close(buf); |
21f58fb7 FD |
2455 | return ret; |
2456 | } | |
2457 | ||
badfe9f5 | 2458 | static |
3bca4b7a MD |
2459 | int lttng_abi_validate_event_param(struct lttng_kernel_abi_event *event_param, |
2460 | struct lttng_kernel_abi_event_ext *event_param_ext) | |
badfe9f5 | 2461 | { |
3bca4b7a MD |
2462 | enum lttng_kernel_abi_match_check match_check; |
2463 | ||
2464 | if (user_event_param_ext_get_match_check(event_param_ext, &match_check)) | |
2465 | return -EINVAL; | |
2466 | ||
badfe9f5 MD |
2467 | /* Limit ABI to implemented features. */ |
2468 | switch (event_param->instrumentation) { | |
606828e4 | 2469 | case LTTNG_KERNEL_ABI_SYSCALL: |
badfe9f5 | 2470 | switch (event_param->u.syscall.entryexit) { |
49b50b8d MD |
2471 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT: |
2472 | lttng_fallthrough; | |
c190d76e MJ |
2473 | case LTTNG_KERNEL_ABI_SYSCALL_ENTRY: |
2474 | lttng_fallthrough; | |
2475 | case LTTNG_KERNEL_ABI_SYSCALL_EXIT: | |
badfe9f5 MD |
2476 | break; |
2477 | default: | |
2478 | return -EINVAL; | |
2479 | } | |
2480 | switch (event_param->u.syscall.abi) { | |
606828e4 | 2481 | case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL: |
badfe9f5 MD |
2482 | break; |
2483 | default: | |
2484 | return -EINVAL; | |
2485 | } | |
2486 | switch (event_param->u.syscall.match) { | |
606828e4 | 2487 | case LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME: |
badfe9f5 MD |
2488 | break; |
2489 | default: | |
2490 | return -EINVAL; | |
2491 | } | |
3bca4b7a MD |
2492 | switch (match_check) { |
2493 | case LTTNG_KERNEL_ABI_MATCH_DEFAULT: | |
2494 | lttng_fallthrough; | |
2495 | case LTTNG_KERNEL_ABI_MATCH_LAZY: | |
2496 | break; | |
2497 | default: | |
2498 | return -EINVAL; | |
2499 | } | |
badfe9f5 MD |
2500 | break; |
2501 | ||
606828e4 | 2502 | case LTTNG_KERNEL_ABI_KRETPROBE: |
88a82b17 | 2503 | switch (event_param->u.kretprobe.entryexit) { |
49b50b8d | 2504 | case LTTNG_KERNEL_ABI_KRETPROBE_ENTRYEXIT: |
99414eaf | 2505 | lttng_fallthrough; |
49b50b8d | 2506 | case LTTNG_KERNEL_ABI_KRETPROBE_ENTRY: |
c190d76e | 2507 | lttng_fallthrough; |
49b50b8d | 2508 | case LTTNG_KERNEL_ABI_KRETPROBE_EXIT: |
99414eaf | 2509 | break; |
88a82b17 MD |
2510 | default: |
2511 | return -EINVAL; | |
2512 | } | |
3bca4b7a MD |
2513 | switch (match_check) { |
2514 | case LTTNG_KERNEL_ABI_MATCH_DEFAULT: | |
2515 | lttng_fallthrough; | |
2516 | case LTTNG_KERNEL_ABI_MATCH_IMMEDIATE: | |
2517 | break; | |
2518 | default: | |
2519 | return -EINVAL; | |
2520 | } | |
88a82b17 MD |
2521 | break; |
2522 | ||
c190d76e | 2523 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
3bca4b7a MD |
2524 | switch (match_check) { |
2525 | case LTTNG_KERNEL_ABI_MATCH_DEFAULT: | |
2526 | lttng_fallthrough; | |
2527 | case LTTNG_KERNEL_ABI_MATCH_LAZY: | |
2528 | break; | |
2529 | default: | |
2530 | return -EINVAL; | |
2531 | } | |
2532 | break; | |
2533 | ||
c190d76e MJ |
2534 | case LTTNG_KERNEL_ABI_KPROBE: |
2535 | lttng_fallthrough; | |
606828e4 | 2536 | case LTTNG_KERNEL_ABI_UPROBE: |
3bca4b7a MD |
2537 | switch (match_check) { |
2538 | case LTTNG_KERNEL_ABI_MATCH_DEFAULT: | |
2539 | lttng_fallthrough; | |
2540 | case LTTNG_KERNEL_ABI_MATCH_IMMEDIATE: | |
2541 | break; | |
2542 | default: | |
2543 | return -EINVAL; | |
2544 | } | |
badfe9f5 MD |
2545 | break; |
2546 | ||
c190d76e MJ |
2547 | case LTTNG_KERNEL_ABI_FUNCTION: |
2548 | lttng_fallthrough; | |
2549 | case LTTNG_KERNEL_ABI_NOOP: | |
2550 | lttng_fallthrough; | |
badfe9f5 MD |
2551 | default: |
2552 | return -EINVAL; | |
2553 | } | |
2554 | return 0; | |
2555 | } | |
2556 | ||
3bca4b7a MD |
2557 | static |
2558 | int lttng_abi_validate_event_match(struct lttng_kernel_abi_event *event_param, | |
2559 | struct lttng_kernel_abi_event_ext *event_param_ext) | |
2560 | { | |
2561 | enum lttng_kernel_abi_match_check match_check; | |
2562 | int ret; | |
2563 | ||
2564 | if (user_event_param_ext_get_match_check(event_param_ext, &match_check)) | |
2565 | return -EINVAL; | |
2566 | ||
2567 | /* Validate match */ | |
2568 | if (match_check == LTTNG_KERNEL_ABI_MATCH_DEFAULT) { | |
2569 | switch (event_param->instrumentation) { | |
2570 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
2571 | lttng_fallthrough; | |
2572 | case LTTNG_KERNEL_ABI_SYSCALL: | |
2573 | match_check = LTTNG_KERNEL_ABI_MATCH_LAZY; | |
2574 | break; | |
2575 | case LTTNG_KERNEL_ABI_KPROBE: | |
2576 | lttng_fallthrough; | |
2577 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
2578 | lttng_fallthrough; | |
2579 | case LTTNG_KERNEL_ABI_UPROBE: | |
2580 | match_check = LTTNG_KERNEL_ABI_MATCH_IMMEDIATE; | |
2581 | break; | |
2582 | ||
2583 | case LTTNG_KERNEL_ABI_FUNCTION: | |
2584 | lttng_fallthrough; | |
2585 | case LTTNG_KERNEL_ABI_NOOP: | |
2586 | lttng_fallthrough; | |
2587 | default: | |
2588 | return -EINVAL; | |
2589 | } | |
2590 | } | |
2591 | ||
2592 | if (match_check == LTTNG_KERNEL_ABI_MATCH_IMMEDIATE) { | |
2593 | switch (event_param->instrumentation) { | |
2594 | break; | |
2595 | case LTTNG_KERNEL_ABI_KPROBE: | |
2596 | ret = lttng_kprobes_match_check(event_param->u.kprobe.symbol_name, | |
2597 | event_param->u.kprobe.offset, | |
2598 | event_param->u.kprobe.addr); | |
2599 | if (ret) | |
2600 | return ret; | |
2601 | break; | |
2602 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
2603 | ret = lttng_kretprobes_match_check(event_param->u.kretprobe.symbol_name, | |
2604 | event_param->u.kretprobe.offset, | |
2605 | event_param->u.kretprobe.addr); | |
2606 | if (ret) | |
2607 | return ret; | |
2608 | break; | |
2609 | case LTTNG_KERNEL_ABI_UPROBE: | |
2610 | /* | |
2611 | * uprobes are immediately created, which includes match checking. | |
2612 | */ | |
2613 | break; | |
2614 | ||
2615 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
2616 | lttng_fallthrough; | |
2617 | case LTTNG_KERNEL_ABI_SYSCALL: | |
2618 | lttng_fallthrough; | |
2619 | case LTTNG_KERNEL_ABI_FUNCTION: | |
2620 | lttng_fallthrough; | |
2621 | case LTTNG_KERNEL_ABI_NOOP: | |
2622 | lttng_fallthrough; | |
2623 | default: | |
2624 | return -EINVAL; | |
2625 | } | |
2626 | } | |
2627 | return 0; | |
2628 | } | |
2629 | ||
653fe716 | 2630 | static |
6674c9bd | 2631 | int lttng_abi_create_event_recorder_enabler(struct file *channel_file, |
3bca4b7a MD |
2632 | struct lttng_kernel_abi_event *event_param, |
2633 | struct lttng_kernel_abi_event_ext *event_param_ext) | |
653fe716 | 2634 | { |
ef784b4d | 2635 | const struct file_operations *fops; |
f7d06400 | 2636 | struct lttng_kernel_channel_buffer *channel = channel_file->private_data; |
653fe716 | 2637 | int event_fd, ret; |
11b5a3c2 | 2638 | struct file *event_file; |
3c997079 | 2639 | void *priv; |
653fe716 | 2640 | |
606828e4 | 2641 | event_param->name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; |
6dccd6c1 | 2642 | switch (event_param->instrumentation) { |
606828e4 MD |
2643 | case LTTNG_KERNEL_ABI_KRETPROBE: |
2644 | event_param->u.kretprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
7371f44c | 2645 | break; |
606828e4 MD |
2646 | case LTTNG_KERNEL_ABI_KPROBE: |
2647 | event_param->u.kprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
e0a7a7c4 | 2648 | break; |
606828e4 | 2649 | case LTTNG_KERNEL_ABI_FUNCTION: |
e884017c MD |
2650 | WARN_ON_ONCE(1); |
2651 | /* Not implemented. */ | |
e0a7a7c4 MD |
2652 | break; |
2653 | default: | |
2654 | break; | |
2655 | } | |
ef784b4d MD |
2656 | |
2657 | switch (event_param->instrumentation) { | |
c190d76e MJ |
2658 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
2659 | lttng_fallthrough; | |
ef784b4d | 2660 | case LTTNG_KERNEL_ABI_SYSCALL: |
fd0402f3 MD |
2661 | lttng_fallthrough; |
2662 | case LTTNG_KERNEL_ABI_KPROBE: | |
99414eaf MD |
2663 | lttng_fallthrough; |
2664 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
1437a010 | 2665 | fops = <tng_event_session_enabler_fops; |
ef784b4d | 2666 | break; |
99414eaf | 2667 | |
ef784b4d | 2668 | case LTTNG_KERNEL_ABI_UPROBE: |
1437a010 | 2669 | fops = <tng_event_session_fops; |
ef784b4d MD |
2670 | break; |
2671 | ||
c190d76e MJ |
2672 | case LTTNG_KERNEL_ABI_FUNCTION: |
2673 | lttng_fallthrough; | |
2674 | case LTTNG_KERNEL_ABI_NOOP: | |
2675 | lttng_fallthrough; | |
ef784b4d MD |
2676 | default: |
2677 | return -EINVAL; | |
2678 | } | |
2679 | ||
2a059b14 | 2680 | event_fd = get_unused_fd_flags(0); |
33a39a3c MD |
2681 | if (event_fd < 0) { |
2682 | ret = event_fd; | |
2683 | goto fd_error; | |
2684 | } | |
6ef1e2f5 | 2685 | event_file = anon_inode_getfile("[lttng_event_recorder]", |
ef784b4d | 2686 | fops, NULL, O_RDWR); |
33a39a3c MD |
2687 | if (IS_ERR(event_file)) { |
2688 | ret = PTR_ERR(event_file); | |
2689 | goto file_error; | |
2690 | } | |
9c1f4643 | 2691 | /* The event holds a reference on the channel */ |
98d7281c | 2692 | if (!atomic_long_add_unless(&channel_file->f_count, 1, LONG_MAX)) { |
0d2c717f | 2693 | ret = -EOVERFLOW; |
9c1f4643 MD |
2694 | goto refcount_error; |
2695 | } | |
3bca4b7a MD |
2696 | ret = lttng_abi_validate_event_param(event_param, event_param_ext); |
2697 | if (ret) | |
2698 | goto event_error; | |
2699 | ret = lttng_abi_validate_event_match(event_param, event_param_ext); | |
badfe9f5 MD |
2700 | if (ret) |
2701 | goto event_error; | |
684a1e4d MD |
2702 | |
2703 | switch (event_param->instrumentation) { | |
c190d76e MJ |
2704 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
2705 | lttng_fallthrough; | |
606828e4 | 2706 | case LTTNG_KERNEL_ABI_SYSCALL: |
684a1e4d | 2707 | { |
1ae083ba | 2708 | struct lttng_event_recorder_enabler *event_enabler; |
33a39a3c | 2709 | |
4993071a PP |
2710 | if (strutils_is_star_glob_pattern(event_param->name)) { |
2711 | /* | |
2712 | * If the event name is a star globbing pattern, | |
2713 | * we create the special star globbing enabler. | |
2714 | */ | |
1ae083ba | 2715 | event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_STAR_GLOB, |
33a39a3c | 2716 | event_param, channel); |
3c997079 | 2717 | } else { |
1ae083ba | 2718 | event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, |
33a39a3c | 2719 | event_param, channel); |
1ec65de1 | 2720 | } |
def1e304 | 2721 | if (event_enabler) |
6ef1e2f5 | 2722 | lttng_event_enabler_session_add(channel->parent.session, &event_enabler->parent); |
b2bc0bc8 | 2723 | priv = event_enabler; |
684a1e4d MD |
2724 | break; |
2725 | } | |
2726 | ||
c190d76e | 2727 | case LTTNG_KERNEL_ABI_KPROBE: |
99414eaf MD |
2728 | lttng_fallthrough; |
2729 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
fd0402f3 MD |
2730 | { |
2731 | struct lttng_event_recorder_enabler *event_enabler; | |
2732 | ||
2733 | event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, | |
2734 | event_param, channel); | |
2735 | if (event_enabler) | |
2736 | lttng_event_enabler_session_add(channel->parent.session, &event_enabler->parent); | |
2737 | priv = event_enabler; | |
2738 | break; | |
2739 | } | |
2740 | ||
606828e4 | 2741 | case LTTNG_KERNEL_ABI_UPROBE: |
684a1e4d | 2742 | { |
83006ee0 | 2743 | struct lttng_kernel_event_common *event; |
1ae083ba | 2744 | struct lttng_event_recorder_enabler *event_enabler; |
4ee2453d | 2745 | |
1ae083ba | 2746 | event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, |
def1e304 MD |
2747 | event_param, channel); |
2748 | if (!event_enabler) { | |
2749 | ret = -ENOMEM; | |
2750 | goto event_error; | |
2751 | } | |
33a39a3c MD |
2752 | /* |
2753 | * We tolerate no failure path after event creation. It | |
2754 | * will stay invariant for the rest of the session. | |
2755 | */ | |
44d1600b | 2756 | event = lttng_kernel_event_create(&event_enabler->parent.parent, NULL, NULL); |
4a46ca39 | 2757 | lttng_event_enabler_destroy(&event_enabler->parent.parent); |
33a39a3c MD |
2758 | if (IS_ERR(event)) { |
2759 | ret = PTR_ERR(event); | |
2760 | goto event_error; | |
80f87dd2 | 2761 | } |
1437a010 | 2762 | priv = event; |
684a1e4d MD |
2763 | break; |
2764 | } | |
2765 | ||
c190d76e MJ |
2766 | case LTTNG_KERNEL_ABI_FUNCTION: |
2767 | lttng_fallthrough; | |
2768 | case LTTNG_KERNEL_ABI_NOOP: | |
2769 | lttng_fallthrough; | |
684a1e4d MD |
2770 | default: |
2771 | ret = -EINVAL; | |
2772 | goto event_error; | |
03037b98 | 2773 | } |
33a39a3c MD |
2774 | event_file->private_data = priv; |
2775 | fd_install(event_fd, event_file); | |
653fe716 MD |
2776 | return event_fd; |
2777 | ||
03037b98 | 2778 | event_error: |
9c1f4643 MD |
2779 | atomic_long_dec(&channel_file->f_count); |
2780 | refcount_error: | |
c0e31d2e | 2781 | fput(event_file); |
653fe716 MD |
2782 | file_error: |
2783 | put_unused_fd(event_fd); | |
2784 | fd_error: | |
653fe716 MD |
2785 | return ret; |
2786 | } | |
ad1c05e1 | 2787 | |
6ef1e2f5 MD |
2788 | static |
2789 | int lttng_abi_create_event_counter_enabler(struct file *channel_file, | |
7b0f1e69 | 2790 | struct lttng_kernel_counter_event *counter_event) |
6ef1e2f5 MD |
2791 | { |
2792 | const struct file_operations *fops; | |
2793 | struct lttng_kernel_channel_counter *channel = channel_file->private_data; | |
7b0f1e69 MD |
2794 | struct lttng_kernel_abi_event *event_param = &counter_event->event_param; |
2795 | struct lttng_kernel_abi_event_ext *event_param_ext = &counter_event->event_param_ext; | |
2796 | struct lttng_kernel_counter_key *counter_key = counter_event->counter_key; | |
6ef1e2f5 MD |
2797 | int event_fd, ret; |
2798 | struct file *event_file; | |
2799 | void *priv; | |
2800 | ||
2801 | event_param->name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
2802 | switch (event_param->instrumentation) { | |
2803 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
2804 | event_param->u.kretprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
2805 | break; | |
2806 | case LTTNG_KERNEL_ABI_KPROBE: | |
2807 | event_param->u.kprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
2808 | break; | |
2809 | case LTTNG_KERNEL_ABI_FUNCTION: | |
2810 | WARN_ON_ONCE(1); | |
2811 | /* Not implemented. */ | |
2812 | break; | |
2813 | default: | |
2814 | break; | |
2815 | } | |
2816 | ||
2817 | switch (event_param->instrumentation) { | |
2818 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
2819 | lttng_fallthrough; | |
2820 | case LTTNG_KERNEL_ABI_SYSCALL: | |
fd0402f3 MD |
2821 | lttng_fallthrough; |
2822 | case LTTNG_KERNEL_ABI_KPROBE: | |
99414eaf MD |
2823 | lttng_fallthrough; |
2824 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
6ef1e2f5 MD |
2825 | fops = <tng_event_session_enabler_fops; |
2826 | break; | |
fd0402f3 | 2827 | |
6ef1e2f5 MD |
2828 | case LTTNG_KERNEL_ABI_UPROBE: |
2829 | fops = <tng_event_session_fops; | |
2830 | break; | |
2831 | ||
2832 | case LTTNG_KERNEL_ABI_FUNCTION: | |
2833 | lttng_fallthrough; | |
2834 | case LTTNG_KERNEL_ABI_NOOP: | |
2835 | lttng_fallthrough; | |
2836 | default: | |
2837 | return -EINVAL; | |
2838 | } | |
2839 | ||
2840 | event_fd = get_unused_fd_flags(0); | |
2841 | if (event_fd < 0) { | |
2842 | ret = event_fd; | |
2843 | goto fd_error; | |
2844 | } | |
2845 | event_file = anon_inode_getfile("[lttng_event_counter]", | |
2846 | fops, NULL, O_RDWR); | |
2847 | if (IS_ERR(event_file)) { | |
2848 | ret = PTR_ERR(event_file); | |
2849 | goto file_error; | |
2850 | } | |
2851 | /* The event holds a reference on the channel */ | |
2852 | if (!atomic_long_add_unless(&channel_file->f_count, 1, LONG_MAX)) { | |
2853 | ret = -EOVERFLOW; | |
2854 | goto refcount_error; | |
2855 | } | |
3bca4b7a MD |
2856 | ret = lttng_abi_validate_event_param(event_param, event_param_ext); |
2857 | if (ret) | |
2858 | goto event_error; | |
2859 | ret = lttng_abi_validate_event_match(event_param, event_param_ext); | |
6ef1e2f5 MD |
2860 | if (ret) |
2861 | goto event_error; | |
2862 | ||
2863 | switch (event_param->instrumentation) { | |
2864 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
2865 | lttng_fallthrough; | |
2866 | case LTTNG_KERNEL_ABI_SYSCALL: | |
2867 | { | |
2868 | struct lttng_event_counter_enabler *event_enabler; | |
2869 | ||
2870 | if (strutils_is_star_glob_pattern(event_param->name)) { | |
2871 | /* | |
2872 | * If the event name is a star globbing pattern, | |
2873 | * we create the special star globbing enabler. | |
2874 | */ | |
2875 | event_enabler = lttng_event_counter_enabler_create(LTTNG_ENABLER_FORMAT_STAR_GLOB, | |
7b0f1e69 | 2876 | event_param, counter_key, channel); |
6ef1e2f5 MD |
2877 | } else { |
2878 | event_enabler = lttng_event_counter_enabler_create(LTTNG_ENABLER_FORMAT_NAME, | |
7b0f1e69 | 2879 | event_param, counter_key, channel); |
6ef1e2f5 MD |
2880 | } |
2881 | if (event_enabler) | |
2882 | lttng_event_enabler_session_add(channel->parent.session, &event_enabler->parent); | |
2883 | priv = event_enabler; | |
2884 | break; | |
2885 | } | |
2886 | ||
2887 | case LTTNG_KERNEL_ABI_KPROBE: | |
99414eaf MD |
2888 | lttng_fallthrough; |
2889 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
fd0402f3 MD |
2890 | { |
2891 | struct lttng_event_counter_enabler *event_enabler; | |
2892 | ||
2893 | event_enabler = lttng_event_counter_enabler_create(LTTNG_ENABLER_FORMAT_NAME, | |
7b0f1e69 | 2894 | event_param, counter_key, channel); |
fd0402f3 MD |
2895 | if (event_enabler) |
2896 | lttng_event_enabler_session_add(channel->parent.session, &event_enabler->parent); | |
2897 | priv = event_enabler; | |
2898 | break; | |
2899 | } | |
2900 | ||
6ef1e2f5 MD |
2901 | case LTTNG_KERNEL_ABI_UPROBE: |
2902 | { | |
2903 | struct lttng_kernel_event_common *event; | |
2904 | struct lttng_event_counter_enabler *event_enabler; | |
2905 | ||
2906 | event_enabler = lttng_event_counter_enabler_create(LTTNG_ENABLER_FORMAT_NAME, | |
7b0f1e69 | 2907 | event_param, counter_key, channel); |
6ef1e2f5 MD |
2908 | if (!event_enabler) { |
2909 | ret = -ENOMEM; | |
2910 | goto event_error; | |
2911 | } | |
2912 | /* | |
2913 | * We tolerate no failure path after event creation. It | |
2914 | * will stay invariant for the rest of the session. | |
2915 | */ | |
44d1600b | 2916 | event = lttng_kernel_event_create(&event_enabler->parent.parent, NULL, NULL); |
6ef1e2f5 MD |
2917 | lttng_event_enabler_destroy(&event_enabler->parent.parent); |
2918 | if (IS_ERR(event)) { | |
2919 | ret = PTR_ERR(event); | |
2920 | goto event_error; | |
2921 | } | |
2922 | priv = event; | |
2923 | break; | |
2924 | } | |
2925 | ||
2926 | case LTTNG_KERNEL_ABI_FUNCTION: | |
2927 | lttng_fallthrough; | |
2928 | case LTTNG_KERNEL_ABI_NOOP: | |
2929 | lttng_fallthrough; | |
2930 | default: | |
2931 | ret = -EINVAL; | |
2932 | goto event_error; | |
2933 | } | |
2934 | event_file->private_data = priv; | |
2935 | fd_install(event_fd, event_file); | |
2936 | return event_fd; | |
2937 | ||
2938 | event_error: | |
2939 | atomic_long_dec(&channel_file->f_count); | |
2940 | refcount_error: | |
2941 | fput(event_file); | |
2942 | file_error: | |
2943 | put_unused_fd(event_fd); | |
2944 | fd_error: | |
2945 | return ret; | |
2946 | } | |
2947 | ||
dffef45d | 2948 | static |
ef784b4d | 2949 | long lttng_event_notifier_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
dffef45d | 2950 | { |
1437a010 | 2951 | struct lttng_kernel_event_common *event = file->private_data; |
dffef45d FD |
2952 | |
2953 | switch (cmd) { | |
606828e4 | 2954 | case LTTNG_KERNEL_ABI_ENABLE: |
1437a010 | 2955 | return lttng_event_enable(event); |
606828e4 | 2956 | case LTTNG_KERNEL_ABI_DISABLE: |
1437a010 | 2957 | return lttng_event_disable(event); |
606828e4 | 2958 | case LTTNG_KERNEL_ABI_FILTER: |
ef784b4d | 2959 | return -EINVAL; |
606828e4 | 2960 | case LTTNG_KERNEL_ABI_CAPTURE: |
ef784b4d | 2961 | return -EINVAL; |
606828e4 | 2962 | case LTTNG_KERNEL_ABI_ADD_CALLSITE: |
1437a010 | 2963 | return lttng_event_add_callsite(event, |
ef784b4d | 2964 | (struct lttng_kernel_abi_event_callsite __user *) arg); |
dffef45d FD |
2965 | default: |
2966 | return -ENOIOCTLCMD; | |
2967 | } | |
2968 | } | |
2969 | ||
2970 | static | |
ef784b4d | 2971 | long lttng_event_notifier_enabler_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
dffef45d | 2972 | { |
1437a010 | 2973 | struct lttng_event_enabler_common *event = file->private_data; |
dffef45d | 2974 | |
ef784b4d MD |
2975 | switch (cmd) { |
2976 | case LTTNG_KERNEL_ABI_ENABLE: | |
1437a010 | 2977 | return lttng_event_enabler_enable(event); |
ef784b4d | 2978 | case LTTNG_KERNEL_ABI_DISABLE: |
1437a010 | 2979 | return lttng_event_enabler_disable(event); |
ef784b4d | 2980 | case LTTNG_KERNEL_ABI_FILTER: |
1437a010 | 2981 | return lttng_event_enabler_attach_filter_bytecode(event, |
ef784b4d MD |
2982 | (struct lttng_kernel_abi_filter_bytecode __user *) arg); |
2983 | case LTTNG_KERNEL_ABI_CAPTURE: | |
1437a010 MD |
2984 | { |
2985 | struct lttng_event_notifier_enabler *event_notifier_enabler = | |
2986 | container_of(event, struct lttng_event_notifier_enabler, parent); | |
ef784b4d MD |
2987 | return lttng_event_notifier_enabler_attach_capture_bytecode( |
2988 | event_notifier_enabler, | |
2989 | (struct lttng_kernel_abi_capture_bytecode __user *) arg); | |
1437a010 | 2990 | } |
ef784b4d MD |
2991 | case LTTNG_KERNEL_ABI_ADD_CALLSITE: |
2992 | return -EINVAL; | |
dffef45d | 2993 | default: |
ef784b4d | 2994 | return -ENOIOCTLCMD; |
dffef45d | 2995 | } |
ef784b4d | 2996 | } |
dffef45d | 2997 | |
ef784b4d MD |
2998 | static |
2999 | int lttng_event_notifier_event_release(struct inode *inode, struct file *file) | |
3000 | { | |
1437a010 | 3001 | struct lttng_kernel_event_common *event = file->private_data; |
ef784b4d | 3002 | |
1437a010 MD |
3003 | if (event) { |
3004 | struct lttng_kernel_event_notifier *event_notifier = | |
3005 | container_of(event, struct lttng_kernel_event_notifier, parent); | |
a67ba386 | 3006 | fput(event_notifier->priv->group->file); |
1437a010 | 3007 | } |
dffef45d FD |
3008 | return 0; |
3009 | } | |
3010 | ||
ef784b4d MD |
3011 | static |
3012 | int lttng_event_notifier_enabler_release(struct inode *inode, struct file *file) | |
3013 | { | |
1437a010 | 3014 | struct lttng_event_enabler_common *event_enabler = file->private_data; |
ef784b4d | 3015 | |
1437a010 MD |
3016 | if (event_enabler) { |
3017 | struct lttng_event_notifier_enabler *event_notifier_enabler = | |
3018 | container_of(event_enabler, struct lttng_event_notifier_enabler, parent); | |
ef784b4d | 3019 | fput(event_notifier_enabler->group->file); |
1437a010 | 3020 | } |
ef784b4d MD |
3021 | return 0; |
3022 | } | |
3023 | ||
3024 | static const struct file_operations lttng_event_notifier_event_fops = { | |
3025 | .owner = THIS_MODULE, | |
3026 | .release = lttng_event_notifier_event_release, | |
3027 | .unlocked_ioctl = lttng_event_notifier_event_ioctl, | |
3028 | #ifdef CONFIG_COMPAT | |
3029 | .compat_ioctl = lttng_event_notifier_event_ioctl, | |
3030 | #endif | |
3031 | }; | |
3032 | ||
3033 | static const struct file_operations lttng_event_notifier_enabler_fops = { | |
dffef45d | 3034 | .owner = THIS_MODULE, |
ef784b4d MD |
3035 | .release = lttng_event_notifier_enabler_release, |
3036 | .unlocked_ioctl = lttng_event_notifier_enabler_ioctl, | |
dffef45d | 3037 | #ifdef CONFIG_COMPAT |
ef784b4d | 3038 | .compat_ioctl = lttng_event_notifier_enabler_ioctl, |
dffef45d FD |
3039 | #endif |
3040 | }; | |
3041 | ||
3042 | static | |
3043 | int lttng_abi_create_event_notifier(struct file *event_notifier_group_file, | |
3bca4b7a MD |
3044 | struct lttng_kernel_abi_event_notifier *event_notifier_param, |
3045 | struct lttng_kernel_abi_event_ext *event_param_ext) | |
dffef45d FD |
3046 | { |
3047 | struct lttng_event_notifier_group *event_notifier_group = | |
3048 | event_notifier_group_file->private_data; | |
ef784b4d | 3049 | const struct file_operations *fops; |
dffef45d FD |
3050 | int event_notifier_fd, ret; |
3051 | struct file *event_notifier_file; | |
3052 | void *priv; | |
3053 | ||
ef784b4d | 3054 | switch (event_notifier_param->event.instrumentation) { |
c190d76e MJ |
3055 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
3056 | lttng_fallthrough; | |
ef784b4d | 3057 | case LTTNG_KERNEL_ABI_SYSCALL: |
fd0402f3 MD |
3058 | lttng_fallthrough; |
3059 | case LTTNG_KERNEL_ABI_KPROBE: | |
99414eaf MD |
3060 | lttng_fallthrough; |
3061 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
ef784b4d MD |
3062 | fops = <tng_event_notifier_enabler_fops; |
3063 | break; | |
fd0402f3 | 3064 | |
ef784b4d MD |
3065 | case LTTNG_KERNEL_ABI_UPROBE: |
3066 | fops = <tng_event_notifier_event_fops; | |
3067 | break; | |
3068 | ||
c190d76e MJ |
3069 | case LTTNG_KERNEL_ABI_FUNCTION: |
3070 | lttng_fallthrough; | |
3071 | case LTTNG_KERNEL_ABI_NOOP: | |
3072 | lttng_fallthrough; | |
ef784b4d MD |
3073 | default: |
3074 | ret = -EINVAL; | |
3075 | goto inval_instr; | |
3076 | } | |
3077 | ||
606828e4 | 3078 | event_notifier_param->event.name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; |
e5457479 MD |
3079 | switch (event_notifier_param->event.instrumentation) { |
3080 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
3081 | event_notifier_param->event.u.kretprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
3082 | break; | |
3083 | case LTTNG_KERNEL_ABI_KPROBE: | |
3084 | event_notifier_param->event.u.kprobe.symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1] = '\0'; | |
3085 | break; | |
3086 | default: | |
3087 | break; | |
3088 | } | |
dffef45d | 3089 | |
2a059b14 | 3090 | event_notifier_fd = get_unused_fd_flags(0); |
dffef45d FD |
3091 | if (event_notifier_fd < 0) { |
3092 | ret = event_notifier_fd; | |
3093 | goto fd_error; | |
3094 | } | |
3095 | ||
3096 | event_notifier_file = anon_inode_getfile("[lttng_event_notifier]", | |
ef784b4d | 3097 | fops, NULL, O_RDWR); |
dffef45d FD |
3098 | if (IS_ERR(event_notifier_file)) { |
3099 | ret = PTR_ERR(event_notifier_file); | |
3100 | goto file_error; | |
3101 | } | |
3102 | ||
3103 | /* The event notifier holds a reference on the event notifier group. */ | |
3104 | if (!atomic_long_add_unless(&event_notifier_group_file->f_count, 1, LONG_MAX)) { | |
3105 | ret = -EOVERFLOW; | |
3106 | goto refcount_error; | |
3107 | } | |
3108 | ||
3bca4b7a MD |
3109 | ret = lttng_abi_validate_event_param(&event_notifier_param->event, event_param_ext); |
3110 | if (ret) | |
3111 | goto event_notifier_error; | |
3112 | ret = lttng_abi_validate_event_match(&event_notifier_param->event, event_param_ext); | |
56237619 MD |
3113 | if (ret) |
3114 | goto event_notifier_error; | |
3115 | ||
684a1e4d | 3116 | switch (event_notifier_param->event.instrumentation) { |
c190d76e MJ |
3117 | case LTTNG_KERNEL_ABI_TRACEPOINT: |
3118 | lttng_fallthrough; | |
606828e4 | 3119 | case LTTNG_KERNEL_ABI_SYSCALL: |
684a1e4d | 3120 | { |
dffef45d FD |
3121 | struct lttng_event_notifier_enabler *enabler; |
3122 | ||
3123 | if (strutils_is_star_glob_pattern(event_notifier_param->event.name)) { | |
3124 | /* | |
3125 | * If the event name is a star globbing pattern, | |
3126 | * we create the special star globbing enabler. | |
3127 | */ | |
3128 | enabler = lttng_event_notifier_enabler_create( | |
dffef45d | 3129 | LTTNG_ENABLER_FORMAT_STAR_GLOB, |
1bbb5b2d MD |
3130 | event_notifier_param, |
3131 | event_notifier_group); | |
dffef45d FD |
3132 | } else { |
3133 | enabler = lttng_event_notifier_enabler_create( | |
dffef45d | 3134 | LTTNG_ENABLER_FORMAT_NAME, |
1bbb5b2d MD |
3135 | event_notifier_param, |
3136 | event_notifier_group); | |
dffef45d | 3137 | } |
1bbb5b2d MD |
3138 | if (enabler) |
3139 | lttng_event_notifier_enabler_group_add(event_notifier_group, enabler); | |
dffef45d | 3140 | priv = enabler; |
684a1e4d MD |
3141 | break; |
3142 | } | |
3143 | ||
c190d76e | 3144 | case LTTNG_KERNEL_ABI_KPROBE: |
99414eaf MD |
3145 | lttng_fallthrough; |
3146 | case LTTNG_KERNEL_ABI_KRETPROBE: | |
fd0402f3 MD |
3147 | { |
3148 | struct lttng_event_notifier_enabler *enabler; | |
3149 | ||
3150 | enabler = lttng_event_notifier_enabler_create(LTTNG_ENABLER_FORMAT_NAME, | |
3151 | event_notifier_param, event_notifier_group); | |
3152 | if (enabler) | |
3153 | lttng_event_notifier_enabler_group_add(event_notifier_group, enabler); | |
3154 | priv = enabler; | |
3155 | break; | |
3156 | } | |
3157 | ||
606828e4 | 3158 | case LTTNG_KERNEL_ABI_UPROBE: |
684a1e4d | 3159 | { |
83006ee0 | 3160 | struct lttng_kernel_event_common *event; |
1bbb5b2d | 3161 | struct lttng_event_notifier_enabler *event_notifier_enabler; |
dffef45d | 3162 | |
1bbb5b2d MD |
3163 | event_notifier_enabler = lttng_event_notifier_enabler_create(LTTNG_ENABLER_FORMAT_NAME, |
3164 | event_notifier_param, event_notifier_group); | |
3165 | if (!event_notifier_enabler) { | |
3166 | ret = -ENOMEM; | |
3167 | goto event_notifier_error; | |
3168 | } | |
44d1600b | 3169 | event = lttng_kernel_event_create(&event_notifier_enabler->parent, NULL, NULL); |
1bbb5b2d | 3170 | lttng_event_enabler_destroy(&event_notifier_enabler->parent); |
83006ee0 MD |
3171 | if (IS_ERR(event)) { |
3172 | ret = PTR_ERR(event); | |
dffef45d FD |
3173 | goto event_notifier_error; |
3174 | } | |
1437a010 | 3175 | priv = event; |
684a1e4d MD |
3176 | break; |
3177 | } | |
3178 | ||
c190d76e MJ |
3179 | case LTTNG_KERNEL_ABI_FUNCTION: |
3180 | lttng_fallthrough; | |
3181 | case LTTNG_KERNEL_ABI_NOOP: | |
3182 | lttng_fallthrough; | |
684a1e4d MD |
3183 | default: |
3184 | ret = -EINVAL; | |
3185 | goto event_notifier_error; | |
dffef45d FD |
3186 | } |
3187 | event_notifier_file->private_data = priv; | |
3188 | fd_install(event_notifier_fd, event_notifier_file); | |
3189 | return event_notifier_fd; | |
3190 | ||
3191 | event_notifier_error: | |
3192 | atomic_long_dec(&event_notifier_group_file->f_count); | |
3193 | refcount_error: | |
3194 | fput(event_notifier_file); | |
3195 | file_error: | |
3196 | put_unused_fd(event_notifier_fd); | |
3197 | fd_error: | |
3198 | inval_instr: | |
3199 | return ret; | |
3200 | } | |
3201 | ||
2ff86ce2 MD |
3202 | static |
3203 | long lttng_abi_session_create_counter( | |
3204 | struct lttng_kernel_session *session, | |
81ab5b77 | 3205 | const struct lttng_kernel_counter_conf *counter_conf) |
2ff86ce2 MD |
3206 | { |
3207 | int counter_fd, ret; | |
3208 | char *counter_transport_name; | |
3209 | struct lttng_kernel_channel_counter *chan_counter = NULL; | |
3210 | struct file *counter_file; | |
2ff86ce2 | 3211 | |
81ab5b77 | 3212 | if (counter_conf->arithmetic != LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR) { |
2ff86ce2 MD |
3213 | printk(KERN_ERR "LTTng: Maps: Counter of the wrong arithmetic type.\n"); |
3214 | return -EINVAL; | |
3215 | } | |
3216 | ||
2ff86ce2 | 3217 | switch (counter_conf->bitness) { |
81ab5b77 | 3218 | case LTTNG_KERNEL_COUNTER_BITNESS_64: |
2ff86ce2 MD |
3219 | counter_transport_name = "counter-per-cpu-64-modular"; |
3220 | break; | |
81ab5b77 | 3221 | case LTTNG_KERNEL_COUNTER_BITNESS_32: |
2ff86ce2 MD |
3222 | counter_transport_name = "counter-per-cpu-32-modular"; |
3223 | break; | |
3224 | default: | |
3225 | return -EINVAL; | |
3226 | } | |
3227 | ||
3228 | lttng_lock_sessions(); | |
3229 | ||
3230 | counter_fd = get_unused_fd_flags(0); | |
3231 | if (counter_fd < 0) { | |
3232 | ret = counter_fd; | |
3233 | goto fd_error; | |
3234 | } | |
3235 | ||
3236 | counter_file = anon_inode_getfile("[lttng_counter]", | |
3237 | <tng_counter_fops, | |
3238 | NULL, O_RDONLY); | |
3239 | if (IS_ERR(counter_file)) { | |
3240 | ret = PTR_ERR(counter_file); | |
3241 | goto file_error; | |
3242 | } | |
3243 | ||
2ff86ce2 MD |
3244 | if (!atomic_long_add_unless(&session->priv->file->f_count, 1, LONG_MAX)) { |
3245 | ret = -EOVERFLOW; | |
3246 | goto refcount_error; | |
3247 | } | |
3248 | ||
81ab5b77 MD |
3249 | chan_counter = lttng_kernel_counter_create(counter_transport_name, 1, counter_conf->dimension_array, 0, |
3250 | counter_conf->flags & LTTNG_KERNEL_COUNTER_CONF_FLAG_COALESCE_HITS); | |
2ff86ce2 MD |
3251 | if (!chan_counter) { |
3252 | ret = -EINVAL; | |
3253 | goto create_error; | |
3254 | } | |
3255 | ||
3256 | chan_counter->priv->parent.file = counter_file; | |
3257 | chan_counter->priv->owner = session->priv->file; | |
3258 | chan_counter->parent.session = session; | |
3259 | list_add(&chan_counter->priv->parent.node, &session->priv->chan_head); | |
3260 | counter_file->private_data = chan_counter; | |
3261 | ||
3262 | fd_install(counter_fd, counter_file); | |
3263 | lttng_unlock_sessions(); | |
3264 | ||
3265 | return counter_fd; | |
3266 | ||
3267 | create_error: | |
3268 | atomic_long_dec(&session->priv->file->f_count); | |
3269 | refcount_error: | |
3270 | fput(counter_file); | |
3271 | file_error: | |
3272 | put_unused_fd(counter_fd); | |
3273 | fd_error: | |
3274 | lttng_unlock_sessions(); | |
3275 | return ret; | |
3276 | } | |
3277 | ||
99f52fcc FD |
3278 | static |
3279 | long lttng_abi_event_notifier_group_create_error_counter( | |
3280 | struct file *event_notifier_group_file, | |
81ab5b77 | 3281 | const struct lttng_kernel_counter_conf *counter_conf) |
99f52fcc FD |
3282 | { |
3283 | int counter_fd, ret; | |
3284 | char *counter_transport_name; | |
76ba9cee | 3285 | struct lttng_kernel_channel_counter *chan_counter = NULL; |
99f52fcc FD |
3286 | struct file *counter_file; |
3287 | struct lttng_event_notifier_group *event_notifier_group = | |
3288 | (struct lttng_event_notifier_group *) event_notifier_group_file->private_data; | |
76ba9cee | 3289 | size_t counter_len; |
99f52fcc | 3290 | |
81ab5b77 | 3291 | if (counter_conf->arithmetic != LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR) { |
99f52fcc FD |
3292 | printk(KERN_ERR "LTTng: event_notifier: Error counter of the wrong arithmetic type.\n"); |
3293 | return -EINVAL; | |
3294 | } | |
3295 | ||
81ab5b77 MD |
3296 | switch (counter_conf->bitness) { |
3297 | case LTTNG_KERNEL_COUNTER_BITNESS_64: | |
99f52fcc FD |
3298 | counter_transport_name = "counter-per-cpu-64-modular"; |
3299 | break; | |
81ab5b77 | 3300 | case LTTNG_KERNEL_COUNTER_BITNESS_32: |
99f52fcc FD |
3301 | counter_transport_name = "counter-per-cpu-32-modular"; |
3302 | break; | |
3303 | default: | |
3304 | return -EINVAL; | |
3305 | } | |
3306 | ||
3307 | /* | |
3308 | * Lock sessions to provide mutual exclusion against concurrent | |
3309 | * modification of event_notifier group, which would result in | |
3310 | * overwriting the error counter if set concurrently. | |
3311 | */ | |
3312 | lttng_lock_sessions(); | |
3313 | ||
3314 | if (event_notifier_group->error_counter) { | |
3315 | printk(KERN_ERR "Error counter already created in event_notifier group\n"); | |
3316 | ret = -EBUSY; | |
3317 | goto fd_error; | |
3318 | } | |
3319 | ||
2a059b14 | 3320 | counter_fd = get_unused_fd_flags(0); |
99f52fcc FD |
3321 | if (counter_fd < 0) { |
3322 | ret = counter_fd; | |
3323 | goto fd_error; | |
3324 | } | |
3325 | ||
3326 | counter_file = anon_inode_getfile("[lttng_counter]", | |
3327 | <tng_counter_fops, | |
3328 | NULL, O_RDONLY); | |
3329 | if (IS_ERR(counter_file)) { | |
3330 | ret = PTR_ERR(counter_file); | |
3331 | goto file_error; | |
3332 | } | |
3333 | ||
99f52fcc FD |
3334 | if (!atomic_long_add_unless(&event_notifier_group_file->f_count, 1, LONG_MAX)) { |
3335 | ret = -EOVERFLOW; | |
3336 | goto refcount_error; | |
3337 | } | |
3338 | ||
81ab5b77 MD |
3339 | counter_len = counter_conf->dimension_array[0].size; |
3340 | chan_counter = lttng_kernel_counter_create(counter_transport_name, 1, counter_conf->dimension_array, 0, false); | |
76ba9cee | 3341 | if (!chan_counter) { |
99f52fcc | 3342 | ret = -EINVAL; |
76ba9cee | 3343 | goto create_error; |
99f52fcc FD |
3344 | } |
3345 | ||
76ba9cee MD |
3346 | chan_counter->priv->parent.file = counter_file; |
3347 | chan_counter->priv->owner = event_notifier_group->file; | |
3348 | counter_file->private_data = chan_counter; | |
99f52fcc | 3349 | event_notifier_group->error_counter_len = counter_len; |
ab04d7b1 MD |
3350 | /* |
3351 | * store-release to publish error counter matches load-acquire | |
3352 | * in record_error. Ensures the counter is created and the | |
3353 | * error_counter_len is set before they are used. | |
3354 | */ | |
76ba9cee MD |
3355 | smp_store_release(&event_notifier_group->error_counter, |
3356 | chan_counter); | |
99f52fcc FD |
3357 | |
3358 | fd_install(counter_fd, counter_file); | |
3359 | lttng_unlock_sessions(); | |
3360 | ||
3361 | return counter_fd; | |
3362 | ||
76ba9cee | 3363 | create_error: |
99f52fcc FD |
3364 | atomic_long_dec(&event_notifier_group_file->f_count); |
3365 | refcount_error: | |
3366 | fput(counter_file); | |
3367 | file_error: | |
3368 | put_unused_fd(counter_fd); | |
3369 | fd_error: | |
3370 | lttng_unlock_sessions(); | |
3371 | return ret; | |
3372 | } | |
3373 | ||
750b05f2 FD |
3374 | static |
3375 | long lttng_event_notifier_group_ioctl(struct file *file, unsigned int cmd, | |
3376 | unsigned long arg) | |
3377 | { | |
81ab5b77 MD |
3378 | int ret; |
3379 | ||
750b05f2 | 3380 | switch (cmd) { |
606828e4 | 3381 | case LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD: |
21f58fb7 FD |
3382 | { |
3383 | return lttng_abi_open_event_notifier_group_stream(file); | |
3384 | } | |
606828e4 | 3385 | case LTTNG_KERNEL_ABI_EVENT_NOTIFIER_CREATE: |
dffef45d | 3386 | { |
606828e4 | 3387 | struct lttng_kernel_abi_event_notifier uevent_notifier_param; |
bd8af103 | 3388 | struct lttng_kernel_abi_event_ext uevent_param_ext = {}; |
3bca4b7a | 3389 | int ret; |
dffef45d FD |
3390 | |
3391 | if (copy_from_user(&uevent_notifier_param, | |
606828e4 | 3392 | (struct lttng_kernel_abi_event_notifier __user *) arg, |
dffef45d FD |
3393 | sizeof(uevent_notifier_param))) |
3394 | return -EFAULT; | |
3bca4b7a MD |
3395 | ret = copy_user_event_param_ext(&uevent_param_ext, &uevent_notifier_param.event); |
3396 | if (ret) | |
3397 | return ret; | |
3398 | return lttng_abi_create_event_notifier(file, &uevent_notifier_param, &uevent_param_ext); | |
dffef45d | 3399 | } |
69c3677a | 3400 | case LTTNG_KERNEL_ABI_OLD_COUNTER: |
99f52fcc | 3401 | { |
434e86ee | 3402 | struct lttng_kernel_counter_conf counter_conf; |
99f52fcc | 3403 | |
81ab5b77 MD |
3404 | ret = lttng_abi_copy_user_old_counter_conf(&counter_conf, |
3405 | (struct lttng_kernel_abi_old_counter_conf __user *) arg); | |
3406 | if (ret) | |
3407 | return ret; | |
3408 | return lttng_abi_event_notifier_group_create_error_counter(file, &counter_conf); | |
3409 | } | |
3410 | case LTTNG_KERNEL_ABI_COUNTER: | |
3411 | { | |
434e86ee | 3412 | struct lttng_kernel_counter_conf counter_conf; |
81ab5b77 MD |
3413 | |
3414 | ret = lttng_abi_copy_user_counter_conf(&counter_conf, | |
3415 | (struct lttng_kernel_abi_counter_conf __user *) arg); | |
3416 | if (ret) | |
3417 | return ret; | |
3418 | return lttng_abi_event_notifier_group_create_error_counter(file, &counter_conf); | |
99f52fcc | 3419 | } |
750b05f2 FD |
3420 | default: |
3421 | return -ENOIOCTLCMD; | |
3422 | } | |
3423 | return 0; | |
3424 | } | |
3425 | ||
3426 | static | |
3427 | int lttng_event_notifier_group_release(struct inode *inode, struct file *file) | |
3428 | { | |
3429 | struct lttng_event_notifier_group *event_notifier_group = | |
3430 | file->private_data; | |
3431 | ||
3432 | if (event_notifier_group) | |
3433 | lttng_event_notifier_group_destroy(event_notifier_group); | |
3434 | return 0; | |
3435 | } | |
3436 | ||
3437 | static const struct file_operations lttng_event_notifier_group_fops = { | |
3438 | .owner = THIS_MODULE, | |
3439 | .release = lttng_event_notifier_group_release, | |
3440 | .unlocked_ioctl = lttng_event_notifier_group_ioctl, | |
3441 | #ifdef CONFIG_COMPAT | |
3442 | .compat_ioctl = lttng_event_notifier_group_ioctl, | |
3443 | #endif | |
3444 | }; | |
3445 | ||
ad1c05e1 MD |
3446 | /** |
3447 | * lttng_channel_ioctl - lttng syscall through ioctl | |
3448 | * | |
c0e31d2e | 3449 | * @file: the file |
ad1c05e1 MD |
3450 | * @cmd: the command |
3451 | * @arg: command arg | |
3452 | * | |
3453 | * This ioctl implements lttng commands: | |
606828e4 | 3454 | * LTTNG_KERNEL_ABI_STREAM |
ad1c05e1 MD |
3455 | * Returns an event stream file descriptor or failure. |
3456 | * (typically, one event stream records events from one CPU) | |
606828e4 | 3457 | * LTTNG_KERNEL_ABI_EVENT |
ad1c05e1 | 3458 | * Returns an event file descriptor or failure. |
606828e4 | 3459 | * LTTNG_KERNEL_ABI_CONTEXT |
8070f5c0 | 3460 | * Prepend a context field to each event in the channel |
606828e4 | 3461 | * LTTNG_KERNEL_ABI_ENABLE |
e64957da | 3462 | * Enable recording for events in this channel (weak enable) |
606828e4 | 3463 | * LTTNG_KERNEL_ABI_DISABLE |
e64957da | 3464 | * Disable recording for events in this channel (strong disable) |
baf20995 | 3465 | * |
baf20995 MD |
3466 | * Channel and event file descriptors also hold a reference on the session. |
3467 | */ | |
ad1c05e1 | 3468 | static |
c0e31d2e | 3469 | long lttng_channel_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
baf20995 | 3470 | { |
f7d06400 | 3471 | struct lttng_kernel_channel_buffer *channel = file->private_data; |
8070f5c0 | 3472 | |
baf20995 | 3473 | switch (cmd) { |
606828e4 MD |
3474 | case LTTNG_KERNEL_ABI_OLD_STREAM: |
3475 | case LTTNG_KERNEL_ABI_STREAM: | |
c0e31d2e | 3476 | return lttng_abi_open_stream(file); |
606828e4 | 3477 | case LTTNG_KERNEL_ABI_OLD_EVENT: |
6dccd6c1 | 3478 | { |
606828e4 MD |
3479 | struct lttng_kernel_abi_event *uevent_param; |
3480 | struct lttng_kernel_abi_old_event *old_uevent_param; | |
6dccd6c1 JD |
3481 | int ret; |
3482 | ||
606828e4 | 3483 | uevent_param = kmalloc(sizeof(struct lttng_kernel_abi_event), |
6dccd6c1 JD |
3484 | GFP_KERNEL); |
3485 | if (!uevent_param) { | |
3486 | ret = -ENOMEM; | |
3487 | goto old_event_end; | |
3488 | } | |
3489 | old_uevent_param = kmalloc( | |
606828e4 | 3490 | sizeof(struct lttng_kernel_abi_old_event), |
6dccd6c1 JD |
3491 | GFP_KERNEL); |
3492 | if (!old_uevent_param) { | |
3493 | ret = -ENOMEM; | |
3494 | goto old_event_error_free_param; | |
3495 | } | |
3496 | if (copy_from_user(old_uevent_param, | |
606828e4 MD |
3497 | (struct lttng_kernel_abi_old_event __user *) arg, |
3498 | sizeof(struct lttng_kernel_abi_old_event))) { | |
6dccd6c1 JD |
3499 | ret = -EFAULT; |
3500 | goto old_event_error_free_old_param; | |
3501 | } | |
3502 | ||
3503 | memcpy(uevent_param->name, old_uevent_param->name, | |
3504 | sizeof(uevent_param->name)); | |
3505 | uevent_param->instrumentation = | |
3506 | old_uevent_param->instrumentation; | |
3507 | ||
3508 | switch (old_uevent_param->instrumentation) { | |
606828e4 | 3509 | case LTTNG_KERNEL_ABI_KPROBE: |
6dccd6c1 JD |
3510 | uevent_param->u.kprobe.addr = |
3511 | old_uevent_param->u.kprobe.addr; | |
3512 | uevent_param->u.kprobe.offset = | |
3513 | old_uevent_param->u.kprobe.offset; | |
3514 | memcpy(uevent_param->u.kprobe.symbol_name, | |
3515 | old_uevent_param->u.kprobe.symbol_name, | |
3516 | sizeof(uevent_param->u.kprobe.symbol_name)); | |
3517 | break; | |
606828e4 | 3518 | case LTTNG_KERNEL_ABI_KRETPROBE: |
6dccd6c1 JD |
3519 | uevent_param->u.kretprobe.addr = |
3520 | old_uevent_param->u.kretprobe.addr; | |
3521 | uevent_param->u.kretprobe.offset = | |
3522 | old_uevent_param->u.kretprobe.offset; | |
3523 | memcpy(uevent_param->u.kretprobe.symbol_name, | |
3524 | old_uevent_param->u.kretprobe.symbol_name, | |
3525 | sizeof(uevent_param->u.kretprobe.symbol_name)); | |
3526 | break; | |
606828e4 | 3527 | case LTTNG_KERNEL_ABI_FUNCTION: |
e884017c MD |
3528 | WARN_ON_ONCE(1); |
3529 | /* Not implemented. */ | |
6dccd6c1 JD |
3530 | break; |
3531 | default: | |
3532 | break; | |
3533 | } | |
3bca4b7a | 3534 | ret = lttng_abi_create_event_recorder_enabler(file, uevent_param, NULL); |
6dccd6c1 JD |
3535 | |
3536 | old_event_error_free_old_param: | |
3537 | kfree(old_uevent_param); | |
3538 | old_event_error_free_param: | |
3539 | kfree(uevent_param); | |
3540 | old_event_end: | |
3541 | return ret; | |
3542 | } | |
606828e4 | 3543 | case LTTNG_KERNEL_ABI_EVENT: |
6dccd6c1 | 3544 | { |
606828e4 | 3545 | struct lttng_kernel_abi_event uevent_param; |
bd8af103 | 3546 | struct lttng_kernel_abi_event_ext uevent_param_ext = {}; |
3bca4b7a | 3547 | int ret; |
6dccd6c1 JD |
3548 | |
3549 | if (copy_from_user(&uevent_param, | |
606828e4 | 3550 | (struct lttng_kernel_abi_event __user *) arg, |
6dccd6c1 JD |
3551 | sizeof(uevent_param))) |
3552 | return -EFAULT; | |
3bca4b7a MD |
3553 | ret = copy_user_event_param_ext(&uevent_param_ext, &uevent_param); |
3554 | if (ret) | |
3555 | return ret; | |
3556 | return lttng_abi_create_event_recorder_enabler(file, &uevent_param, &uevent_param_ext); | |
6dccd6c1 | 3557 | } |
606828e4 | 3558 | case LTTNG_KERNEL_ABI_OLD_CONTEXT: |
6dccd6c1 | 3559 | { |
606828e4 MD |
3560 | struct lttng_kernel_abi_context *ucontext_param; |
3561 | struct lttng_kernel_abi_old_context *old_ucontext_param; | |
6dccd6c1 JD |
3562 | int ret; |
3563 | ||
606828e4 | 3564 | ucontext_param = kmalloc(sizeof(struct lttng_kernel_abi_context), |
6dccd6c1 JD |
3565 | GFP_KERNEL); |
3566 | if (!ucontext_param) { | |
3567 | ret = -ENOMEM; | |
3568 | goto old_ctx_end; | |
3569 | } | |
606828e4 | 3570 | old_ucontext_param = kmalloc(sizeof(struct lttng_kernel_abi_old_context), |
6dccd6c1 JD |
3571 | GFP_KERNEL); |
3572 | if (!old_ucontext_param) { | |
3573 | ret = -ENOMEM; | |
3574 | goto old_ctx_error_free_param; | |
3575 | } | |
3576 | ||
3577 | if (copy_from_user(old_ucontext_param, | |
606828e4 MD |
3578 | (struct lttng_kernel_abi_old_context __user *) arg, |
3579 | sizeof(struct lttng_kernel_abi_old_context))) { | |
6dccd6c1 JD |
3580 | ret = -EFAULT; |
3581 | goto old_ctx_error_free_old_param; | |
3582 | } | |
3583 | ucontext_param->ctx = old_ucontext_param->ctx; | |
3584 | memcpy(ucontext_param->padding, old_ucontext_param->padding, | |
3585 | sizeof(ucontext_param->padding)); | |
3586 | /* only type that uses the union */ | |
606828e4 | 3587 | if (old_ucontext_param->ctx == LTTNG_KERNEL_ABI_CONTEXT_PERF_COUNTER) { |
6dccd6c1 JD |
3588 | ucontext_param->u.perf_counter.type = |
3589 | old_ucontext_param->u.perf_counter.type; | |
3590 | ucontext_param->u.perf_counter.config = | |
3591 | old_ucontext_param->u.perf_counter.config; | |
3592 | memcpy(ucontext_param->u.perf_counter.name, | |
3593 | old_ucontext_param->u.perf_counter.name, | |
3594 | sizeof(ucontext_param->u.perf_counter.name)); | |
3595 | } | |
3596 | ||
3597 | ret = lttng_abi_add_context(file, | |
3598 | ucontext_param, | |
f7d06400 | 3599 | &channel->priv->ctx, channel->parent.session); |
6dccd6c1 JD |
3600 | |
3601 | old_ctx_error_free_old_param: | |
3602 | kfree(old_ucontext_param); | |
3603 | old_ctx_error_free_param: | |
3604 | kfree(ucontext_param); | |
3605 | old_ctx_end: | |
3606 | return ret; | |
3607 | } | |
606828e4 | 3608 | case LTTNG_KERNEL_ABI_CONTEXT: |
6dccd6c1 | 3609 | { |
606828e4 | 3610 | struct lttng_kernel_abi_context ucontext_param; |
6dccd6c1 JD |
3611 | |
3612 | if (copy_from_user(&ucontext_param, | |
606828e4 | 3613 | (struct lttng_kernel_abi_context __user *) arg, |
6dccd6c1 JD |
3614 | sizeof(ucontext_param))) |
3615 | return -EFAULT; | |
3616 | return lttng_abi_add_context(file, | |
3617 | &ucontext_param, | |
f7d06400 | 3618 | &channel->priv->ctx, channel->parent.session); |
6dccd6c1 | 3619 | } |
606828e4 MD |
3620 | case LTTNG_KERNEL_ABI_OLD_ENABLE: |
3621 | case LTTNG_KERNEL_ABI_ENABLE: | |
6b757027 | 3622 | return lttng_channel_enable(&channel->parent); |
606828e4 MD |
3623 | case LTTNG_KERNEL_ABI_OLD_DISABLE: |
3624 | case LTTNG_KERNEL_ABI_DISABLE: | |
6b757027 | 3625 | return lttng_channel_disable(&channel->parent); |
606828e4 | 3626 | case LTTNG_KERNEL_ABI_SYSCALL_MASK: |
c970b655 | 3627 | return lttng_syscall_table_get_active_mask(&channel->priv->parent.syscall_table, |
606828e4 | 3628 | (struct lttng_kernel_abi_syscall_mask __user *) arg); |
baf20995 MD |
3629 | default: |
3630 | return -ENOIOCTLCMD; | |
3631 | } | |
3632 | } | |
3633 | ||
5dbbdb43 MD |
3634 | /** |
3635 | * lttng_metadata_ioctl - lttng syscall through ioctl | |
3636 | * | |
3637 | * @file: the file | |
3638 | * @cmd: the command | |
3639 | * @arg: command arg | |
3640 | * | |
3641 | * This ioctl implements lttng commands: | |
606828e4 | 3642 | * LTTNG_KERNEL_ABI_STREAM |
5dbbdb43 MD |
3643 | * Returns an event stream file descriptor or failure. |
3644 | * | |
3645 | * Channel and event file descriptors also hold a reference on the session. | |
3646 | */ | |
3647 | static | |
3648 | long lttng_metadata_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
3649 | { | |
3650 | switch (cmd) { | |
606828e4 MD |
3651 | case LTTNG_KERNEL_ABI_OLD_STREAM: |
3652 | case LTTNG_KERNEL_ABI_STREAM: | |
d83004aa | 3653 | return lttng_abi_open_metadata_stream(file); |
5dbbdb43 MD |
3654 | default: |
3655 | return -ENOIOCTLCMD; | |
3656 | } | |
3657 | } | |
3658 | ||
653fe716 MD |
3659 | /** |
3660 | * lttng_channel_poll - lttng stream addition/removal monitoring | |
3661 | * | |
c0e31d2e | 3662 | * @file: the file |
653fe716 MD |
3663 | * @wait: poll table |
3664 | */ | |
56386a64 | 3665 | static |
c0e31d2e | 3666 | unsigned int lttng_channel_poll(struct file *file, poll_table *wait) |
653fe716 | 3667 | { |
f7d06400 | 3668 | struct lttng_kernel_channel_buffer *channel = file->private_data; |
653fe716 MD |
3669 | unsigned int mask = 0; |
3670 | ||
c0e31d2e | 3671 | if (file->f_mode & FMODE_READ) { |
a33e44a6 | 3672 | poll_wait_set_exclusive(wait); |
f7d06400 | 3673 | poll_wait(file, channel->ops->priv->get_hp_wait_queue(channel->priv->rb_chan), |
24cedcfe | 3674 | wait); |
653fe716 | 3675 | |
f7d06400 | 3676 | if (channel->ops->priv->is_disabled(channel->priv->rb_chan)) |
254ec7bc | 3677 | return POLLERR; |
f7d06400 | 3678 | if (channel->ops->priv->is_finalized(channel->priv->rb_chan)) |
653fe716 | 3679 | return POLLHUP; |
f7d06400 | 3680 | if (channel->ops->priv->buffer_has_read_closed_stream(channel->priv->rb_chan)) |
653fe716 | 3681 | return POLLIN | POLLRDNORM; |
f71ecafa | 3682 | return 0; |
653fe716 MD |
3683 | } |
3684 | return mask; | |
3685 | ||
3686 | } | |
3687 | ||
0a84a57f MD |
3688 | static |
3689 | int lttng_channel_release(struct inode *inode, struct file *file) | |
3690 | { | |
f7d06400 | 3691 | struct lttng_kernel_channel_buffer *channel = file->private_data; |
c269fff4 MD |
3692 | |
3693 | if (channel) | |
f7d06400 | 3694 | fput(channel->parent.session->priv->file); |
0a84a57f MD |
3695 | return 0; |
3696 | } | |
3697 | ||
d83004aa JD |
3698 | static |
3699 | int lttng_metadata_channel_release(struct inode *inode, struct file *file) | |
3700 | { | |
f7d06400 | 3701 | struct lttng_kernel_channel_buffer *channel = file->private_data; |
d83004aa JD |
3702 | |
3703 | if (channel) { | |
f7d06400 | 3704 | fput(channel->parent.session->priv->file); |
2ff86ce2 | 3705 | lttng_metadata_channel_buffer_destroy(channel); |
d83004aa JD |
3706 | } |
3707 | ||
3708 | return 0; | |
3709 | } | |
3710 | ||
ad1c05e1 | 3711 | static const struct file_operations lttng_channel_fops = { |
a33c9927 | 3712 | .owner = THIS_MODULE, |
03037b98 | 3713 | .release = lttng_channel_release, |
653fe716 | 3714 | .poll = lttng_channel_poll, |
ad1c05e1 | 3715 | .unlocked_ioctl = lttng_channel_ioctl, |
baf20995 | 3716 | #ifdef CONFIG_COMPAT |
03037b98 | 3717 | .compat_ioctl = lttng_channel_ioctl, |
baf20995 | 3718 | #endif |
11b5a3c2 | 3719 | }; |
baf20995 | 3720 | |
5dbbdb43 | 3721 | static const struct file_operations lttng_metadata_fops = { |
a33c9927 | 3722 | .owner = THIS_MODULE, |
d83004aa | 3723 | .release = lttng_metadata_channel_release, |
5dbbdb43 MD |
3724 | .unlocked_ioctl = lttng_metadata_ioctl, |
3725 | #ifdef CONFIG_COMPAT | |
3726 | .compat_ioctl = lttng_metadata_ioctl, | |
3727 | #endif | |
3728 | }; | |
3729 | ||
8070f5c0 | 3730 | /** |
1437a010 | 3731 | * lttng_event_ioctl - lttng syscall through ioctl |
8070f5c0 MD |
3732 | * |
3733 | * @file: the file | |
3734 | * @cmd: the command | |
3735 | * @arg: command arg | |
3736 | * | |
3737 | * This ioctl implements lttng commands: | |
606828e4 | 3738 | * LTTNG_KERNEL_ABI_CONTEXT |
8070f5c0 | 3739 | * Prepend a context field to each record of this event |
606828e4 | 3740 | * LTTNG_KERNEL_ABI_ENABLE |
e64957da | 3741 | * Enable recording for this event (weak enable) |
606828e4 | 3742 | * LTTNG_KERNEL_ABI_DISABLE |
e64957da | 3743 | * Disable recording for this event (strong disable) |
8070f5c0 MD |
3744 | */ |
3745 | static | |
1437a010 | 3746 | long lttng_event_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
8070f5c0 | 3747 | { |
1437a010 | 3748 | struct lttng_kernel_event_common *event = file->private_data; |
8070f5c0 MD |
3749 | |
3750 | switch (cmd) { | |
606828e4 | 3751 | case LTTNG_KERNEL_ABI_OLD_CONTEXT: |
6dccd6c1 | 3752 | { |
3c997079 MD |
3753 | /* Not implemented */ |
3754 | return -ENOSYS; | |
6dccd6c1 | 3755 | } |
606828e4 | 3756 | case LTTNG_KERNEL_ABI_CONTEXT: |
6dccd6c1 | 3757 | { |
3c997079 MD |
3758 | /* Not implemented */ |
3759 | return -ENOSYS; | |
6dccd6c1 | 3760 | } |
606828e4 MD |
3761 | case LTTNG_KERNEL_ABI_OLD_ENABLE: |
3762 | case LTTNG_KERNEL_ABI_ENABLE: | |
1437a010 | 3763 | return lttng_event_enable(event); |
606828e4 MD |
3764 | case LTTNG_KERNEL_ABI_OLD_DISABLE: |
3765 | case LTTNG_KERNEL_ABI_DISABLE: | |
1437a010 | 3766 | return lttng_event_disable(event); |
606828e4 | 3767 | case LTTNG_KERNEL_ABI_FILTER: |
ef784b4d | 3768 | return -EINVAL; |
606828e4 | 3769 | case LTTNG_KERNEL_ABI_ADD_CALLSITE: |
1437a010 | 3770 | return lttng_event_add_callsite(event, |
ef784b4d | 3771 | (struct lttng_kernel_abi_event_callsite __user *) arg); |
8070f5c0 MD |
3772 | default: |
3773 | return -ENOIOCTLCMD; | |
3774 | } | |
3775 | } | |
3776 | ||
ef784b4d MD |
3777 | /** |
3778 | * lttng_event_recorder_enabler_ioctl - lttng syscall through ioctl | |
3779 | * | |
3780 | * @file: the file | |
3781 | * @cmd: the command | |
3782 | * @arg: command arg | |
3783 | * | |
3784 | * This ioctl implements lttng commands: | |
3785 | * LTTNG_KERNEL_ABI_CONTEXT | |
3786 | * Prepend a context field to each record of this event | |
3787 | * LTTNG_KERNEL_ABI_ENABLE | |
3788 | * Enable recording for this event (weak enable) | |
3789 | * LTTNG_KERNEL_ABI_DISABLE | |
3790 | * Disable recording for this event (strong disable) | |
3791 | */ | |
0a84a57f | 3792 | static |
1437a010 | 3793 | long lttng_event_enabler_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
0a84a57f | 3794 | { |
1437a010 | 3795 | struct lttng_event_enabler_common *event_enabler = file->private_data; |
3c997079 | 3796 | |
ef784b4d MD |
3797 | switch (cmd) { |
3798 | case LTTNG_KERNEL_ABI_OLD_CONTEXT: | |
3799 | { | |
3800 | /* Not implemented */ | |
3801 | return -ENOSYS; | |
3802 | } | |
3803 | case LTTNG_KERNEL_ABI_CONTEXT: | |
3804 | { | |
3805 | /* Not implemented */ | |
3806 | return -ENOSYS; | |
3807 | } | |
3808 | case LTTNG_KERNEL_ABI_OLD_ENABLE: | |
3809 | case LTTNG_KERNEL_ABI_ENABLE: | |
1437a010 | 3810 | return lttng_event_enabler_enable(event_enabler); |
ef784b4d MD |
3811 | case LTTNG_KERNEL_ABI_OLD_DISABLE: |
3812 | case LTTNG_KERNEL_ABI_DISABLE: | |
1437a010 | 3813 | return lttng_event_enabler_disable(event_enabler); |
ef784b4d | 3814 | case LTTNG_KERNEL_ABI_FILTER: |
fd0402f3 MD |
3815 | /* |
3816 | * Filters are only supported by tracepoint and syscall instrumentation. | |
3817 | */ | |
3818 | switch (event_enabler->event_param.instrumentation) { | |
3819 | case LTTNG_KERNEL_ABI_TRACEPOINT: | |
3820 | lttng_fallthrough; | |
3821 | case LTTNG_KERNEL_ABI_SYSCALL: | |
3822 | return lttng_event_enabler_attach_filter_bytecode(event_enabler, | |
3823 | (struct lttng_kernel_abi_filter_bytecode __user *) arg); | |
3824 | ||
3825 | default: | |
3826 | return -EINVAL; | |
3827 | } | |
ef784b4d MD |
3828 | case LTTNG_KERNEL_ABI_ADD_CALLSITE: |
3829 | return -EINVAL; | |
3c997079 | 3830 | default: |
ef784b4d | 3831 | return -ENOIOCTLCMD; |
3c997079 | 3832 | } |
ef784b4d MD |
3833 | } |
3834 | ||
3835 | static | |
1437a010 | 3836 | int lttng_event_session_release(struct inode *inode, struct file *file) |
ef784b4d | 3837 | { |
1437a010 | 3838 | struct lttng_kernel_event_common *event = file->private_data; |
ef784b4d | 3839 | |
1437a010 MD |
3840 | if (event) { |
3841 | struct lttng_kernel_event_session_common_private *event_session_priv = | |
3842 | container_of(event->priv, struct lttng_kernel_event_session_common_private, parent); | |
3843 | fput(event_session_priv->chan->priv->file); | |
3844 | } | |
ef784b4d MD |
3845 | return 0; |
3846 | } | |
c269fff4 | 3847 | |
ef784b4d | 3848 | static |
1437a010 | 3849 | int lttng_event_session_enabler_release(struct inode *inode, struct file *file) |
ef784b4d | 3850 | { |
1437a010 | 3851 | struct lttng_event_enabler_common *event_enabler = file->private_data; |
ef784b4d | 3852 | |
1437a010 MD |
3853 | if (event_enabler) { |
3854 | struct lttng_event_enabler_session_common *event_session_enabler = | |
3855 | container_of(event_enabler, struct lttng_event_enabler_session_common, parent); | |
3856 | fput(event_session_enabler->chan->priv->file); | |
3857 | } | |
0a84a57f MD |
3858 | return 0; |
3859 | } | |
3860 | ||
1437a010 | 3861 | static const struct file_operations lttng_event_session_fops = { |
ef784b4d | 3862 | .owner = THIS_MODULE, |
1437a010 MD |
3863 | .release = lttng_event_session_release, |
3864 | .unlocked_ioctl = lttng_event_ioctl, | |
ef784b4d | 3865 | #ifdef CONFIG_COMPAT |
1437a010 | 3866 | .compat_ioctl = lttng_event_ioctl, |
ef784b4d MD |
3867 | #endif |
3868 | }; | |
3869 | ||
1437a010 | 3870 | static const struct file_operations lttng_event_session_enabler_fops = { |
a33c9927 | 3871 | .owner = THIS_MODULE, |
1437a010 MD |
3872 | .release = lttng_event_session_enabler_release, |
3873 | .unlocked_ioctl = lttng_event_enabler_ioctl, | |
8070f5c0 | 3874 | #ifdef CONFIG_COMPAT |
1437a010 | 3875 | .compat_ioctl = lttng_event_enabler_ioctl, |
8070f5c0 | 3876 | #endif |
11b5a3c2 | 3877 | }; |
0a84a57f | 3878 | |
3b731ab1 JD |
3879 | static int put_u64(uint64_t val, unsigned long arg) |
3880 | { | |
3881 | return put_user(val, (uint64_t __user *) arg); | |
3882 | } | |
3883 | ||
8b97fd42 MD |
3884 | static int put_u32(uint32_t val, unsigned long arg) |
3885 | { | |
3886 | return put_user(val, (uint32_t __user *) arg); | |
3887 | } | |
3888 | ||
ed8d02d6 JD |
3889 | static long lttng_stream_ring_buffer_ioctl(struct file *filp, |
3890 | unsigned int cmd, unsigned long arg) | |
3891 | { | |
e20c0fec | 3892 | struct lttng_kernel_ring_buffer *buf = filp->private_data; |
860c213b | 3893 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
e20c0fec | 3894 | const struct lttng_kernel_ring_buffer_config *config = &chan->backend.config; |
4a399b76 | 3895 | const struct lttng_kernel_channel_buffer_ops *ops = chan->backend.priv_ops; |
3b731ab1 JD |
3896 | int ret; |
3897 | ||
3898 | if (atomic_read(&chan->record_disabled)) | |
3899 | return -EIO; | |
3900 | ||
ed8d02d6 | 3901 | switch (cmd) { |
606828e4 | 3902 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_BEGIN: |
3b731ab1 JD |
3903 | { |
3904 | uint64_t ts; | |
3905 | ||
4a399b76 | 3906 | ret = ops->priv->timestamp_begin(config, buf, &ts); |
3b731ab1 JD |
3907 | if (ret < 0) |
3908 | goto error; | |
3909 | return put_u64(ts, arg); | |
3910 | } | |
606828e4 | 3911 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_END: |
3b731ab1 JD |
3912 | { |
3913 | uint64_t ts; | |
3914 | ||
4a399b76 | 3915 | ret = ops->priv->timestamp_end(config, buf, &ts); |
3b731ab1 JD |
3916 | if (ret < 0) |
3917 | goto error; | |
3918 | return put_u64(ts, arg); | |
3919 | } | |
606828e4 | 3920 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_EVENTS_DISCARDED: |
3b731ab1 JD |
3921 | { |
3922 | uint64_t ed; | |
3923 | ||
4a399b76 | 3924 | ret = ops->priv->events_discarded(config, buf, &ed); |
3b731ab1 JD |
3925 | if (ret < 0) |
3926 | goto error; | |
3927 | return put_u64(ed, arg); | |
3928 | } | |
606828e4 | 3929 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_CONTENT_SIZE: |
3b731ab1 JD |
3930 | { |
3931 | uint64_t cs; | |
3932 | ||
4a399b76 | 3933 | ret = ops->priv->content_size(config, buf, &cs); |
3b731ab1 JD |
3934 | if (ret < 0) |
3935 | goto error; | |
3936 | return put_u64(cs, arg); | |
3937 | } | |
606828e4 | 3938 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_PACKET_SIZE: |
3b731ab1 JD |
3939 | { |
3940 | uint64_t ps; | |
3941 | ||
4a399b76 | 3942 | ret = ops->priv->packet_size(config, buf, &ps); |
3b731ab1 JD |
3943 | if (ret < 0) |
3944 | goto error; | |
3945 | return put_u64(ps, arg); | |
3946 | } | |
606828e4 | 3947 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_STREAM_ID: |
3b731ab1 JD |
3948 | { |
3949 | uint64_t si; | |
3950 | ||
4a399b76 | 3951 | ret = ops->priv->stream_id(config, buf, &si); |
3b731ab1 JD |
3952 | if (ret < 0) |
3953 | goto error; | |
3954 | return put_u64(si, arg); | |
3955 | } | |
606828e4 | 3956 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP: |
2348ca17 JD |
3957 | { |
3958 | uint64_t ts; | |
3959 | ||
4a399b76 | 3960 | ret = ops->priv->current_timestamp(config, buf, &ts); |
2348ca17 JD |
3961 | if (ret < 0) |
3962 | goto error; | |
3963 | return put_u64(ts, arg); | |
3964 | } | |
606828e4 | 3965 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_SEQ_NUM: |
5b3cf4f9 JD |
3966 | { |
3967 | uint64_t seq; | |
3968 | ||
4a399b76 | 3969 | ret = ops->priv->sequence_number(config, buf, &seq); |
5b3cf4f9 JD |
3970 | if (ret < 0) |
3971 | goto error; | |
3972 | return put_u64(seq, arg); | |
3973 | } | |
606828e4 | 3974 | case LTTNG_KERNEL_ABI_RING_BUFFER_INSTANCE_ID: |
5594698f JD |
3975 | { |
3976 | uint64_t id; | |
3977 | ||
4a399b76 | 3978 | ret = ops->priv->instance_id(config, buf, &id); |
5594698f JD |
3979 | if (ret < 0) |
3980 | goto error; | |
3981 | return put_u64(id, arg); | |
3982 | } | |
3b731ab1 JD |
3983 | default: |
3984 | return lib_ring_buffer_file_operations.unlocked_ioctl(filp, | |
3985 | cmd, arg); | |
ed8d02d6 | 3986 | } |
3b731ab1 JD |
3987 | |
3988 | error: | |
3989 | return -ENOSYS; | |
ed8d02d6 JD |
3990 | } |
3991 | ||
3992 | #ifdef CONFIG_COMPAT | |
3993 | static long lttng_stream_ring_buffer_compat_ioctl(struct file *filp, | |
3994 | unsigned int cmd, unsigned long arg) | |
3995 | { | |
e20c0fec | 3996 | struct lttng_kernel_ring_buffer *buf = filp->private_data; |
860c213b | 3997 | struct lttng_kernel_ring_buffer_channel *chan = buf->backend.chan; |
e20c0fec | 3998 | const struct lttng_kernel_ring_buffer_config *config = &chan->backend.config; |
4a399b76 | 3999 | const struct lttng_kernel_channel_buffer_ops *ops = chan->backend.priv_ops; |
3b731ab1 JD |
4000 | int ret; |
4001 | ||
4002 | if (atomic_read(&chan->record_disabled)) | |
4003 | return -EIO; | |
4004 | ||
ed8d02d6 | 4005 | switch (cmd) { |
606828e4 | 4006 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN: |
3b731ab1 JD |
4007 | { |
4008 | uint64_t ts; | |
4009 | ||
4a399b76 | 4010 | ret = ops->priv->timestamp_begin(config, buf, &ts); |
3b731ab1 JD |
4011 | if (ret < 0) |
4012 | goto error; | |
4013 | return put_u64(ts, arg); | |
4014 | } | |
606828e4 | 4015 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_TIMESTAMP_END: |
3b731ab1 JD |
4016 | { |
4017 | uint64_t ts; | |
4018 | ||
4a399b76 | 4019 | ret = ops->priv->timestamp_end(config, buf, &ts); |
3b731ab1 JD |
4020 | if (ret < 0) |
4021 | goto error; | |
4022 | return put_u64(ts, arg); | |
4023 | } | |
606828e4 | 4024 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED: |
3b731ab1 JD |
4025 | { |
4026 | uint64_t ed; | |
4027 | ||
4a399b76 | 4028 | ret = ops->priv->events_discarded(config, buf, &ed); |
3b731ab1 JD |
4029 | if (ret < 0) |
4030 | goto error; | |
4031 | return put_u64(ed, arg); | |
ed8d02d6 | 4032 | } |
606828e4 | 4033 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_CONTENT_SIZE: |
3b731ab1 JD |
4034 | { |
4035 | uint64_t cs; | |
4036 | ||
4a399b76 | 4037 | ret = ops->priv->content_size(config, buf, &cs); |
3b731ab1 JD |
4038 | if (ret < 0) |
4039 | goto error; | |
4040 | return put_u64(cs, arg); | |
4041 | } | |
606828e4 | 4042 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_PACKET_SIZE: |
3b731ab1 JD |
4043 | { |
4044 | uint64_t ps; | |
4045 | ||
4a399b76 | 4046 | ret = ops->priv->packet_size(config, buf, &ps); |
3b731ab1 JD |
4047 | if (ret < 0) |
4048 | goto error; | |
4049 | return put_u64(ps, arg); | |
4050 | } | |
606828e4 | 4051 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_STREAM_ID: |
3b731ab1 JD |
4052 | { |
4053 | uint64_t si; | |
4054 | ||
4a399b76 | 4055 | ret = ops->priv->stream_id(config, buf, &si); |
3b731ab1 JD |
4056 | if (ret < 0) |
4057 | goto error; | |
4058 | return put_u64(si, arg); | |
4059 | } | |
606828e4 | 4060 | case LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP: |
2348ca17 JD |
4061 | { |
4062 | uint64_t ts; | |
4063 | ||
4a399b76 | 4064 | ret = ops->priv->current_timestamp(config, buf, &ts); |
2348ca17 JD |
4065 | if (ret < 0) |
4066 | goto error; | |
4067 | return put_u64(ts, arg); | |
4068 | } | |
606828e4 | 4069 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_GET_SEQ_NUM: |
5b3cf4f9 JD |
4070 | { |
4071 | uint64_t seq; | |
4072 | ||
4a399b76 | 4073 | ret = ops->priv->sequence_number(config, buf, &seq); |
5b3cf4f9 JD |
4074 | if (ret < 0) |
4075 | goto error; | |
4076 | return put_u64(seq, arg); | |
4077 | } | |
606828e4 | 4078 | case LTTNG_KERNEL_ABI_RING_BUFFER_COMPAT_INSTANCE_ID: |
5594698f JD |
4079 | { |
4080 | uint64_t id; | |
4081 | ||
4a399b76 | 4082 | ret = ops->priv->instance_id(config, buf, &id); |
5594698f JD |
4083 | if (ret < 0) |
4084 | goto error; | |
4085 | return put_u64(id, arg); | |
4086 | } | |
3b731ab1 JD |
4087 | default: |
4088 | return lib_ring_buffer_file_operations.compat_ioctl(filp, | |
4089 | cmd, arg); | |
4090 | } | |
4091 | ||
4092 | error: | |
4093 | return -ENOSYS; | |
ed8d02d6 JD |
4094 | } |
4095 | #endif /* CONFIG_COMPAT */ | |
4096 | ||
4097 | static void lttng_stream_override_ring_buffer_fops(void) | |
4098 | { | |
4099 | lttng_stream_ring_buffer_file_operations.owner = THIS_MODULE; | |
4100 | lttng_stream_ring_buffer_file_operations.open = | |
4101 | lib_ring_buffer_file_operations.open; | |
4102 | lttng_stream_ring_buffer_file_operations.release = | |
4103 | lib_ring_buffer_file_operations.release; | |
4104 | lttng_stream_ring_buffer_file_operations.poll = | |
4105 | lib_ring_buffer_file_operations.poll; | |
4106 | lttng_stream_ring_buffer_file_operations.splice_read = | |
4107 | lib_ring_buffer_file_operations.splice_read; | |
4108 | lttng_stream_ring_buffer_file_operations.mmap = | |
4109 | lib_ring_buffer_file_operations.mmap; | |
4110 | lttng_stream_ring_buffer_file_operations.unlocked_ioctl = | |
4111 | lttng_stream_ring_buffer_ioctl; | |
4112 | lttng_stream_ring_buffer_file_operations.llseek = | |
4113 | lib_ring_buffer_file_operations.llseek; | |
4114 | #ifdef CONFIG_COMPAT | |
4115 | lttng_stream_ring_buffer_file_operations.compat_ioctl = | |
4116 | lttng_stream_ring_buffer_compat_ioctl; | |
4117 | #endif | |
4118 | } | |
4119 | ||
80996790 | 4120 | int __init lttng_abi_init(void) |
baf20995 MD |
4121 | { |
4122 | int ret = 0; | |
4123 | ||
263b6c88 | 4124 | wrapper_vmalloc_sync_mappings(); |
2754583e | 4125 | lttng_clock_ref(); |
f771eda6 JD |
4126 | |
4127 | ret = lttng_tp_mempool_init(); | |
4128 | if (ret) { | |
4129 | goto error; | |
4130 | } | |
4131 | ||
d29348f7 | 4132 | lttng_proc_dentry = proc_create_data("lttng", S_IRUSR | S_IWUSR, NULL, |
059de147 | 4133 | <tng_proc_ops, NULL); |
2470a237 | 4134 | |
255e52a4 | 4135 | if (!lttng_proc_dentry) { |
5a15f70c | 4136 | printk(KERN_ERR "LTTng: Error creating control file\n"); |
baf20995 MD |
4137 | ret = -ENOMEM; |
4138 | goto error; | |
4139 | } | |
ed8d02d6 | 4140 | lttng_stream_override_ring_buffer_fops(); |
2754583e | 4141 | return 0; |
ed8d02d6 | 4142 | |
baf20995 | 4143 | error: |
f771eda6 | 4144 | lttng_tp_mempool_destroy(); |
2754583e | 4145 | lttng_clock_unref(); |
baf20995 MD |
4146 | return ret; |
4147 | } | |
4148 | ||
e6e65fcd MD |
4149 | /* No __exit annotation because used by init error path too. */ |
4150 | void lttng_abi_exit(void) | |
baf20995 | 4151 | { |
f771eda6 | 4152 | lttng_tp_mempool_destroy(); |
2754583e | 4153 | lttng_clock_unref(); |
e6a17f26 MD |
4154 | if (lttng_proc_dentry) |
4155 | remove_proc_entry("lttng", NULL); | |
baf20995 | 4156 | } |