Cleanup: Move all source files to src/

[lttng-modules.git] / probes / lttng.c

diff --git a/probes/lttng.c b/probes/lttng.c
deleted file mode 100644 (file)
index 8a0dd4b..0000000
--- a/probes/lttng.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * lttng.c
- *
- * LTTng logger ABI
- *
- * Copyright (C) 2008-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <linux/module.h>
-#include <linux/tracepoint.h>
-#include <linux/uaccess.h>
-#include <linux/gfp.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <wrapper/vmalloc.h>
-#include <lttng/events.h>
-
-#define TP_MODULE_NOAUTOLOAD
-#define LTTNG_PACKAGE_BUILD
-#define CREATE_TRACE_POINTS
-#define TRACE_INCLUDE_PATH instrumentation/events
-#define TRACE_INCLUDE_FILE lttng
-#define LTTNG_INSTRUMENTATION
-
-#include <instrumentation/events/lttng.h>
-
-/* Events written through logger are truncated at 1024 bytes */
-#define LTTNG_LOGGER_COUNT_MAX 1024
-#define LTTNG_LOGGER_FILE      "lttng-logger"
-
-DEFINE_TRACE(lttng_logger);
-
-static struct proc_dir_entry *lttng_logger_dentry;
-
-/**
- * lttng_logger_write - write a userspace string into the trace system
- * @file: file pointer
- * @user_buf: user string
- * @count: length to copy
- * @ppos: file position
- *
- * Copy a userspace string into a trace event named "lttng:logger".
- * Copies at most @count bytes into the event "msg" dynamic array.
- * Truncates the count at LTTNG_LOGGER_COUNT_MAX. Returns the number of
- * bytes copied from the source.
- * Return -1 on error, with EFAULT errno.
- */
-static
-ssize_t lttng_logger_write(struct file *file, const char __user *user_buf,
-                   size_t count, loff_t *ppos)
-{
-       int nr_pages = 1, i;
-       unsigned long uaddr = (unsigned long) user_buf;
-       struct page *pages[2];
-       ssize_t written;
-       int ret;
-
-       /* Truncate count */
-       if (unlikely(count > LTTNG_LOGGER_COUNT_MAX))
-               count = LTTNG_LOGGER_COUNT_MAX;
-
-       /* How many pages are we dealing with ? */
-       if (unlikely((uaddr & PAGE_MASK) != ((uaddr + count) & PAGE_MASK)))
-               nr_pages = 2;
-
-       /* Pin userspace pages */
-       ret = get_user_pages_fast(uaddr, nr_pages, 0, pages);
-       if (unlikely(ret < nr_pages)) {
-               if (ret > 0) {
-                       BUG_ON(ret != 1);
-                       put_page(pages[0]);
-               }
-               written = -EFAULT;
-               goto end;
-       }
-
-       /* Trace the event */
-       trace_lttng_logger(user_buf, count);
-       written = count;
-       *ppos += written;
-
-       for (i = 0; i < nr_pages; i++)
-               put_page(pages[i]);
-end:
-       return written;
-}
-
-static const struct file_operations lttng_logger_operations = {
-       .write = lttng_logger_write,
-};
-
-/*
- * Linux 5.6 introduced a separate proc_ops struct for /proc operations
- * to decouple it from the vfs.
- */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
-static const struct proc_ops lttng_logger_proc_ops = {
-       .proc_write = lttng_logger_write,
-};
-#else
-#define lttng_logger_proc_ops lttng_logger_operations
-#endif
-
-static struct miscdevice logger_dev = {
-       .minor = MISC_DYNAMIC_MINOR,
-       .name = "lttng-logger",
-       .mode = 0666,
-       .fops = &lttng_logger_operations
-};
-
-int __init lttng_logger_init(void)
-{
-       int ret = 0;
-
-       wrapper_vmalloc_sync_mappings();
-
-       /* /dev/lttng-logger */
-       ret = misc_register(&logger_dev);
-       if (ret) {
-               printk(KERN_ERR "Error creating LTTng logger device\n");
-               goto error;
-       }
-
-       /* /proc/lttng-logger */
-       lttng_logger_dentry = proc_create_data(LTTNG_LOGGER_FILE,
-                               S_IRUGO | S_IWUGO, NULL,
-                               &lttng_logger_proc_ops, NULL);
-       if (!lttng_logger_dentry) {
-               printk(KERN_ERR "Error creating LTTng logger proc file\n");
-               ret = -ENOMEM;
-               goto error_proc;
-       }
-
-       /* Init */
-       ret = __lttng_events_init__lttng();
-       if (ret)
-               goto error_events;
-       return ret;
-
-error_events:
-       remove_proc_entry("lttng-logger", NULL);
-error_proc:
-       misc_deregister(&logger_dev);
-error:
-       return ret;
-}
-
-void lttng_logger_exit(void)
-{
-       __lttng_events_exit__lttng();
-       if (lttng_logger_dentry)
-               remove_proc_entry("lttng-logger", NULL);
-       misc_deregister(&logger_dev);
-}