C++ (Cpp) wrapper_vmalloc_sync_all示例

示例#1

文件： lttng-context-vpid.c 项目： crossbuild/lttng-modules

int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx)
{
	struct lttng_ctx_field *field;

	field = lttng_append_context(ctx);
	if (!field)
		return -ENOMEM;
	if (lttng_find_context(*ctx, "vpid")) {
		lttng_remove_context_field(ctx, field);
		return -EEXIST;
	}
	field->event_field.name = "vpid";
	field->event_field.type.atype = atype_integer;
	field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
	field->event_field.type.u.basic.integer.alignment = lttng_alignof(pid_t) * CHAR_BIT;
	field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(pid_t);
	field->event_field.type.u.basic.integer.reverse_byte_order = 0;
	field->event_field.type.u.basic.integer.base = 10;
	field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
	field->get_size = vpid_get_size;
	field->record = vpid_record;
	field->get_value = vpid_get_value;
	lttng_context_update(*ctx);
	wrapper_vmalloc_sync_all();
	return 0;
}

示例#2

文件： lttng-context-hostname.c 项目： bjayesh/chandra

int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx)
{
	struct lttng_ctx_field *field;

	field = lttng_append_context(ctx);
	if (!field)
		return -ENOMEM;
	if (lttng_find_context(*ctx, "hostname")) {
		lttng_remove_context_field(ctx, field);
		return -EEXIST;
	}
	field->event_field.name = "hostname";
	field->event_field.type.atype = atype_array;
	field->event_field.type.u.array.elem_type.atype = atype_integer;
	field->event_field.type.u.array.elem_type.u.basic.integer.size = sizeof(char) * CHAR_BIT;
	field->event_field.type.u.array.elem_type.u.basic.integer.alignment = lttng_alignof(char) * CHAR_BIT;
	field->event_field.type.u.array.elem_type.u.basic.integer.signedness = lttng_is_signed_type(char);
	field->event_field.type.u.array.elem_type.u.basic.integer.reverse_byte_order = 0;
	field->event_field.type.u.array.elem_type.u.basic.integer.base = 10;
	field->event_field.type.u.array.elem_type.u.basic.integer.encoding = lttng_encode_UTF8;
	field->event_field.type.u.array.length = LTTNG_HOSTNAME_CTX_LEN;

	field->get_size = hostname_get_size;
	field->record = hostname_record;
	wrapper_vmalloc_sync_all();
	return 0;
}

示例#3

文件： lttng-test.c 项目： PSRCode/lttng-modules

static
int __init lttng_test_init(void)
{
	int ret = 0;

	(void) wrapper_lttng_fixup_sig(THIS_MODULE);
	wrapper_vmalloc_sync_all();
	lttng_test_filter_event_dentry =
			proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE,
				S_IRUGO | S_IWUGO, NULL,
				&lttng_test_filter_event_operations, NULL);
	if (!lttng_test_filter_event_dentry) {
		printk(KERN_ERR "Error creating LTTng test filter file\n");
		ret = -ENOMEM;
		goto error;
	}
	ret = __lttng_events_init__lttng_test();
	if (ret)
		goto error_events;
	return ret;

error_events:
	remove_proc_entry(LTTNG_TEST_FILTER_EVENT_FILE, NULL);
error:
	return ret;
}

示例#4

文件： lttng-context-prio.c 项目： kongzizaixian/armor

int lttng_add_prio_to_ctx(struct lttng_ctx **ctx)
{
	struct lttng_ctx_field *field;
	int ret;

	if (!wrapper_task_prio_sym) {
		ret = wrapper_task_prio_init();
		if (ret)
			return ret;
	}

	field = lttng_append_context(ctx);
	if (!field)
		return -ENOMEM;
	if (lttng_find_context(*ctx, "prio")) {
		lttng_remove_context_field(ctx, field);
		return -EEXIST;
	}
	field->event_field.name = "prio";
	field->event_field.type.atype = atype_integer;
	field->event_field.type.u.basic.integer.size = sizeof(int) * CHAR_BIT;
	field->event_field.type.u.basic.integer.alignment = lttng_alignof(int) * CHAR_BIT;
	field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(int);
	field->event_field.type.u.basic.integer.reverse_byte_order = 0;
	field->event_field.type.u.basic.integer.base = 10;
	field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
	field->get_size = prio_get_size;
	field->record = prio_record;
	lttng_context_update(*ctx);
	wrapper_vmalloc_sync_all();
	return 0;
}

示例#5

文件： lttng-types.c 项目： jdesfossez/lttng-modules-dev

static int lttng_types_init(void)
{
	int ret = 0;

	wrapper_vmalloc_sync_all();
	/* TODO */
	return ret;
}

示例#6

文件： lttng-abi.c 项目： cbiancheri/lttng-modules

int __init lttng_abi_init(void)
{
	int ret = 0;

	wrapper_vmalloc_sync_all();
	lttng_clock_ref();
	lttng_proc_dentry = proc_create_data("lttng", S_IRUSR | S_IWUSR, NULL,
					&lttng_fops, NULL);
	
	if (!lttng_proc_dentry) {
		printk(KERN_ERR "Error creating LTTng control file\n");
		ret = -ENOMEM;
		goto error;
	}
	lttng_stream_override_ring_buffer_fops();
	return 0;

error:
	lttng_clock_unref();
	return ret;
}

示例#7

文件： lttngprofile.c 项目： giraldeau/lttng-profile-modules

int __init lttngprofile_init(void)
{
  int ret = 0;

  wrapper_vmalloc_sync_all();

  lttngprofile_proc_dentry = proc_create_data(LTTNGPROFILE_PROC,
      S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH,
      NULL, &lttngprofile_fops, NULL);

  if (!lttngprofile_proc_dentry) {
    printk(KERN_ERR "Error creating lttngprofile control file\n");
    ret = -ENOMEM;
    goto error;
  }

  // Register probes.
  if (lttng_wrapper_tracepoint_probe_register(
        "sys_enter", syscall_entry_probe, NULL) < 0 ||
      lttng_wrapper_tracepoint_probe_register(
        "sys_exit", syscall_exit_probe, NULL) < 0 ||
      lttng_wrapper_tracepoint_probe_register(
        "sched_process_exit", sched_process_exit_probe, NULL) < 0)
  {
    printk("tracepoint_probe_register failed, returned %d\n", ret);
    goto error;
  }

  printk("LTTng-profile module loaded successfully.\n");

  return ret;

error:
  if (lttngprofile_proc_dentry)
    remove_proc_entry(LTTNGPROFILE_PROC, NULL);

  probes_unregister();

  return ret;
}

示例#8

文件： lttng.c 项目： crossbuild/lttng-modules

int __init lttng_logger_init(void)
{
	int ret = 0;

	wrapper_vmalloc_sync_all();
	lttng_logger_dentry = proc_create_data(LTTNG_LOGGER_FILE,
				S_IRUGO | S_IWUGO, NULL,
				&lttng_logger_operations, NULL);
	if (!lttng_logger_dentry) {
		printk(KERN_ERR "Error creating LTTng logger file\n");
		ret = -ENOMEM;
		goto error;
	}
	ret = __lttng_events_init__lttng();
	if (ret)
		goto error_events;
	return ret;

error_events:
	remove_proc_entry("lttng-logger", NULL);
error:
	return ret;
}

示例#9

文件： lttng-syscalls.c 项目： skrishnakar/lttng-modules

int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
{
	struct lttng_kernel_event ev;
	int ret;

	wrapper_vmalloc_sync_all();

	if (!chan->sc_table) {
		/* create syscall table mapping syscall to events */
		chan->sc_table = kzalloc(sizeof(struct lttng_event *)
					* ARRAY_SIZE(sc_table), GFP_KERNEL);
		if (!chan->sc_table)
			return -ENOMEM;
	}

#ifdef CONFIG_COMPAT
	if (!chan->compat_sc_table) {
		/* create syscall table mapping compat syscall to events */
		chan->compat_sc_table = kzalloc(sizeof(struct lttng_event *)
					* ARRAY_SIZE(compat_sc_table), GFP_KERNEL);
		if (!chan->compat_sc_table)
			return -ENOMEM;
	}
#endif
	if (!chan->sc_unknown) {
		const struct lttng_event_desc *desc =
			&__event_desc___sys_unknown;

		memset(&ev, 0, sizeof(ev));
		strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
		ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
		ev.instrumentation = LTTNG_KERNEL_NOOP;
		chan->sc_unknown = lttng_event_create(chan, &ev, filter,
						    desc);
		WARN_ON_ONCE(!chan->sc_unknown);
		if (IS_ERR(chan->sc_unknown)) {
			return PTR_ERR(chan->sc_unknown);
		}
	}

	if (!chan->sc_compat_unknown) {
		const struct lttng_event_desc *desc =
			&__event_desc___compat_sys_unknown;

		memset(&ev, 0, sizeof(ev));
		strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
		ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
		ev.instrumentation = LTTNG_KERNEL_NOOP;
		chan->sc_compat_unknown = lttng_event_create(chan, &ev, filter,
							   desc);
		WARN_ON_ONCE(!chan->sc_unknown);
		if (IS_ERR(chan->sc_compat_unknown)) {
			return PTR_ERR(chan->sc_compat_unknown);
		}
	}

	if (!chan->sc_exit) {
		const struct lttng_event_desc *desc =
			&__event_desc___exit_syscall;

		memset(&ev, 0, sizeof(ev));
		strncpy(ev.name, desc->name, LTTNG_KERNEL_SYM_NAME_LEN);
		ev.name[LTTNG_KERNEL_SYM_NAME_LEN - 1] = '\0';
		ev.instrumentation = LTTNG_KERNEL_NOOP;
		chan->sc_exit = lttng_event_create(chan, &ev, filter,
						 desc);
		WARN_ON_ONCE(!chan->sc_exit);
		if (IS_ERR(chan->sc_exit)) {
			return PTR_ERR(chan->sc_exit);
		}
	}

	ret = fill_table(sc_table, ARRAY_SIZE(sc_table),
			chan->sc_table, chan, filter);
	if (ret)
		return ret;
#ifdef CONFIG_COMPAT
	ret = fill_table(compat_sc_table, ARRAY_SIZE(compat_sc_table),
			chan->compat_sc_table, chan, filter);
	if (ret)
		return ret;
#endif
	ret = lttng_wrapper_tracepoint_probe_register("sys_enter",
			(void *) syscall_entry_probe, chan);
	if (ret)
		return ret;
	/*
	 * We change the name of sys_exit tracepoint due to namespace
	 * conflict with sys_exit syscall entry.
	 */
	ret = lttng_wrapper_tracepoint_probe_register("sys_exit",
			(void *) __event_probe__exit_syscall,
			chan->sc_exit);
	if (ret) {
		WARN_ON_ONCE(lttng_wrapper_tracepoint_probe_unregister("sys_enter",
			(void *) syscall_entry_probe, chan));
	}
	return ret;
}

示例#10

文件： ring_buffer_backend.c 项目： tahini/lttng-modules

/**
 * lib_ring_buffer_backend_allocate - allocate a channel buffer
 * @config: ring buffer instance configuration
 * @buf: the buffer struct
 * @size: total size of the buffer
 * @num_subbuf: number of subbuffers
 * @extra_reader_sb: need extra subbuffer for reader
 */
static
int lib_ring_buffer_backend_allocate(const struct lib_ring_buffer_config *config,
				     struct lib_ring_buffer_backend *bufb,
				     size_t size, size_t num_subbuf,
				     int extra_reader_sb)
{
	struct channel_backend *chanb = &bufb->chan->backend;
	unsigned long j, num_pages, num_pages_per_subbuf, page_idx = 0;
	unsigned long subbuf_size, mmap_offset = 0;
	unsigned long num_subbuf_alloc;
	struct page **pages;
	unsigned long i;

	num_pages = size >> PAGE_SHIFT;
	num_pages_per_subbuf = num_pages >> get_count_order(num_subbuf);
	subbuf_size = chanb->subbuf_size;
	num_subbuf_alloc = num_subbuf;

	if (extra_reader_sb) {
		num_pages += num_pages_per_subbuf; /* Add pages for reader */
		num_subbuf_alloc++;
	}

	pages = vmalloc_node(ALIGN(sizeof(*pages) * num_pages,
				   1 << INTERNODE_CACHE_SHIFT),
			cpu_to_node(max(bufb->cpu, 0)));
	if (unlikely(!pages))
		goto pages_error;

	bufb->array = lttng_kvmalloc_node(ALIGN(sizeof(*bufb->array)
					 * num_subbuf_alloc,
				  1 << INTERNODE_CACHE_SHIFT),
			GFP_KERNEL | __GFP_NOWARN,
			cpu_to_node(max(bufb->cpu, 0)));
	if (unlikely(!bufb->array))
		goto array_error;

	for (i = 0; i < num_pages; i++) {
		pages[i] = alloc_pages_node(cpu_to_node(max(bufb->cpu, 0)),
				GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0);
		if (unlikely(!pages[i]))
			goto depopulate;
	}
	bufb->num_pages_per_subbuf = num_pages_per_subbuf;

	/* Allocate backend pages array elements */
	for (i = 0; i < num_subbuf_alloc; i++) {
		bufb->array[i] =
			lttng_kvzalloc_node(ALIGN(
				sizeof(struct lib_ring_buffer_backend_pages) +
				sizeof(struct lib_ring_buffer_backend_page)
				* num_pages_per_subbuf,
				1 << INTERNODE_CACHE_SHIFT),
				GFP_KERNEL | __GFP_NOWARN,
				cpu_to_node(max(bufb->cpu, 0)));
		if (!bufb->array[i])
			goto free_array;
	}

	/* Allocate write-side subbuffer table */
	bufb->buf_wsb = lttng_kvzalloc_node(ALIGN(
				sizeof(struct lib_ring_buffer_backend_subbuffer)
				* num_subbuf,
				1 << INTERNODE_CACHE_SHIFT),
				GFP_KERNEL | __GFP_NOWARN,
				cpu_to_node(max(bufb->cpu, 0)));
	if (unlikely(!bufb->buf_wsb))
		goto free_array;

	for (i = 0; i < num_subbuf; i++)
		bufb->buf_wsb[i].id = subbuffer_id(config, 0, 1, i);

	/* Assign read-side subbuffer table */
	if (extra_reader_sb)
		bufb->buf_rsb.id = subbuffer_id(config, 0, 1,
						num_subbuf_alloc - 1);
	else
		bufb->buf_rsb.id = subbuffer_id(config, 0, 1, 0);

	/* Allocate subbuffer packet counter table */
	bufb->buf_cnt = lttng_kvzalloc_node(ALIGN(
				sizeof(struct lib_ring_buffer_backend_counts)
				* num_subbuf,
				1 << INTERNODE_CACHE_SHIFT),
			GFP_KERNEL | __GFP_NOWARN,
			cpu_to_node(max(bufb->cpu, 0)));
	if (unlikely(!bufb->buf_cnt))
		goto free_wsb;

	/* Assign pages to page index */
	for (i = 0; i < num_subbuf_alloc; i++) {
		for (j = 0; j < num_pages_per_subbuf; j++) {
			CHAN_WARN_ON(chanb, page_idx > num_pages);
			bufb->array[i]->p[j].virt = page_address(pages[page_idx]);
			bufb->array[i]->p[j].pfn = page_to_pfn(pages[page_idx]);
			page_idx++;
		}
		if (config->output == RING_BUFFER_MMAP) {
			bufb->array[i]->mmap_offset = mmap_offset;
			mmap_offset += subbuf_size;
		}
	}

	/*
	 * If kmalloc ever uses vmalloc underneath, make sure the buffer pages
	 * will not fault.
	 */
	wrapper_vmalloc_sync_all();
	vfree(pages);
	return 0;

free_wsb:
	lttng_kvfree(bufb->buf_wsb);
free_array:
	for (i = 0; (i < num_subbuf_alloc && bufb->array[i]); i++)
		lttng_kvfree(bufb->array[i]);
depopulate:
	/* Free all allocated pages */
	for (i = 0; (i < num_pages && pages[i]); i++)
		__free_page(pages[i]);
	lttng_kvfree(bufb->array);
array_error:
	vfree(pages);
pages_error:
	return -ENOMEM;
}