#include "lttng-events.h"
#include "wrapper/irqdesc.h"
#include "wrapper/spinlock.h"
+#include "wrapper/fdtable.h"
+#include "wrapper/nsproxy.h"
+#include "wrapper/irq.h"
+#include "wrapper/tracepoint.h"
-#ifdef CONFIG_GENERIC_HARDIRQS
+#ifdef CONFIG_LTTNG_HAS_LIST_IRQ
#include <linux/irq.h>
#endif
#define TRACE_INCLUDE_FILE lttng-statedump
#include "instrumentation/events/lttng-module/lttng-statedump.h"
+struct lttng_fd_ctx {
+ char *page;
+ struct lttng_session *session;
+ struct task_struct *p;
+};
+
/*
* Protected by the trace lock.
*/
}
#endif /* CONFIG_INET */
+static
+int lttng_dump_one_fd(const void *p, struct file *file, unsigned int fd)
+{
+ const struct lttng_fd_ctx *ctx = p;
+ const char *s = d_path(&file->f_path, ctx->page, PAGE_SIZE);
+
+ if (IS_ERR(s)) {
+ struct dentry *dentry = file->f_path.dentry;
+
+ /* Make sure we give at least some info */
+ spin_lock(&dentry->d_lock);
+ trace_lttng_statedump_file_descriptor(ctx->session, ctx->p, fd,
+ dentry->d_name.name);
+ spin_unlock(&dentry->d_lock);
+ goto end;
+ }
+ trace_lttng_statedump_file_descriptor(ctx->session, ctx->p, fd, s);
+end:
+ return 0;
+}
static
void lttng_enumerate_task_fd(struct lttng_session *session,
struct task_struct *p, char *tmp)
{
- struct fdtable *fdt;
- struct file *filp;
- unsigned int i;
- const unsigned char *path;
+ struct lttng_fd_ctx ctx = { .page = tmp, .session = session, .p = p };
task_lock(p);
- if (!p->files)
- goto unlock_task;
- spin_lock(&p->files->file_lock);
- fdt = files_fdtable(p->files);
- for (i = 0; i < fdt->max_fds; i++) {
- filp = fcheck_files(p->files, i);
- if (!filp)
- continue;
- path = d_path(&filp->f_path, tmp, PAGE_SIZE);
- /* Make sure we give at least some info */
- trace_lttng_statedump_file_descriptor(session, p, i,
- IS_ERR(path) ?
- filp->f_dentry->d_name.name :
- path);
- }
- spin_unlock(&p->files->file_lock);
-unlock_task:
+ lttng_iterate_fd(p->files, 0, lttng_dump_one_fd, &ctx);
task_unlock(p);
}
}
#endif
-#ifdef CONFIG_GENERIC_HARDIRQS
+#ifdef CONFIG_LTTNG_HAS_LIST_IRQ
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39))
#define irq_desc_get_chip(desc) get_irq_desc_chip(desc)
}
#else
static inline
-void list_interrupts(struct lttng_session *session)
+void lttng_list_interrupts(struct lttng_session *session)
{
}
#endif
rcu_read_lock();
proxy = task_nsproxy(p);
if (proxy) {
- pid_ns = proxy->pid_ns;
+ pid_ns = lttng_get_proxy_pid_ns(proxy);
do {
trace_lttng_statedump_process_state(session,
p, type, mode, submode, status, pid_ns);
{
int cpu;
- printk(KERN_DEBUG "LTT state dump thread start\n");
trace_lttng_statedump_start(session);
lttng_enumerate_process_states(session);
lttng_enumerate_file_descriptors(session);
__wait_event(statedump_wq, (atomic_read(&kernel_threads_to_run) == 0));
put_online_cpus();
/* Our work is done */
- printk(KERN_DEBUG "LTT state dump end\n");
trace_lttng_statedump_end(session);
return 0;
}
*/
int lttng_statedump_start(struct lttng_session *session)
{
- printk(KERN_DEBUG "LTTng: state dump begin\n");
return do_lttng_statedump(session);
}
EXPORT_SYMBOL_GPL(lttng_statedump_start);
+static
+int __init lttng_statedump_init(void)
+{
+ /*
+ * Allow module to load even if the fixup cannot be done. This
+ * will allow seemless transition when the underlying issue fix
+ * is merged into the Linux kernel, and when tracepoint.c
+ * "tracepoint_module_notify" is turned into a static function.
+ */
+ (void) wrapper_lttng_fixup_sig(THIS_MODULE);
+ return 0;
+}
+
+module_init(lttng_statedump_init);
+
+static
+void __exit lttng_statedump_exit(void)
+{
+}
+
+module_exit(lttng_statedump_exit);
+
MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("Jean-Hugues Deschenes");
MODULE_DESCRIPTION("Linux Trace Toolkit Next Generation Statedump");