-/*
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
+ *
* lttng-statedump.c
*
* Linux Trace Toolkit Next Generation Kernel State Dump
* Copyright 2005 Jean-Hugues Deschenes <jean-hugues.deschenes@polymtl.ca>
* Copyright 2006-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
* Changes:
* Eric Clement: Add listing of network IP interface
* 2006, 2007 Mathieu Desnoyers Fix kernel threads
#include <linux/cpu.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
-#include <linux/sched.h>
#include <linux/mm.h>
-#include <linux/fdtable.h>
#include <linux/swap.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <wrapper/tracepoint.h>
#include <wrapper/genhd.h>
#include <wrapper/file.h>
-#include <wrapper/time.h>
+#include <wrapper/fdtable.h>
+#include <wrapper/sched.h>
#ifdef CONFIG_LTTNG_HAS_LIST_IRQ
#include <linux/irq.h>
#define LTTNG_INSTRUMENTATION
#include <instrumentation/events/lttng-module/lttng-statedump.h>
-DEFINE_TRACE(lttng_statedump_block_device);
-DEFINE_TRACE(lttng_statedump_end);
-DEFINE_TRACE(lttng_statedump_interrupt);
-DEFINE_TRACE(lttng_statedump_file_descriptor);
-DEFINE_TRACE(lttng_statedump_start);
-DEFINE_TRACE(lttng_statedump_process_state);
-DEFINE_TRACE(lttng_statedump_network_interface);
+LTTNG_DEFINE_TRACE(lttng_statedump_block_device,
+ TP_PROTO(struct lttng_session *session,
+ dev_t dev, const char *diskname),
+ TP_ARGS(session, dev, diskname));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_end,
+ TP_PROTO(struct lttng_session *session),
+ TP_ARGS(session));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_interrupt,
+ TP_PROTO(struct lttng_session *session,
+ unsigned int irq, const char *chip_name,
+ struct irqaction *action),
+ TP_ARGS(session, irq, chip_name, action));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_file_descriptor,
+ TP_PROTO(struct lttng_session *session,
+ struct task_struct *p, int fd, const char *filename,
+ unsigned int flags, fmode_t fmode),
+ TP_ARGS(session, p, fd, filename, flags, fmode));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_start,
+ TP_PROTO(struct lttng_session *session),
+ TP_ARGS(session));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_process_state,
+ TP_PROTO(struct lttng_session *session,
+ struct task_struct *p,
+ int type, int mode, int submode, int status,
+ struct pid_namespace *pid_ns),
+ TP_ARGS(session, p, type, mode, submode, status, pid_ns));
+
+LTTNG_DEFINE_TRACE(lttng_statedump_network_interface,
+ TP_PROTO(struct lttng_session *session,
+ struct net_device *dev, struct in_ifaddr *ifa),
+ TP_ARGS(session, dev, ifa));
struct lttng_fd_ctx {
char *page;
LTTNG_DEAD = 7,
};
+
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0))
+
+#define LTTNG_PART_STRUCT_TYPE struct block_device
+
+static
+int lttng_get_part_name(struct gendisk *disk, struct block_device *part, char *name_buf)
+{
+ const char *p;
+
+ p = bdevname(part, name_buf);
+ if (!p)
+ return -ENOSYS;
+
+ return 0;
+}
+
+static
+dev_t lttng_get_part_devt(struct block_device *part)
+{
+ return part->bd_dev;
+}
+
+#else
+
+#define LTTNG_PART_STRUCT_TYPE struct hd_struct
+
+static
+int lttng_get_part_name(struct gendisk *disk, struct hd_struct *part, char *name_buf)
+{
+ const char *p;
+ struct block_device bdev;
+
+ /*
+ * Create a partial 'struct blockdevice' to use
+ * 'bdevname()' which is a simple wrapper over
+ * 'disk_name()' but has the honor to be EXPORT_SYMBOL.
+ */
+ bdev.bd_disk = disk;
+ bdev.bd_part = part;
+
+ p = bdevname(&bdev, name_buf);
+ if (!p)
+ return -ENOSYS;
+
+ return 0;
+}
+
+static
+dev_t lttng_get_part_devt(struct hd_struct *part)
+{
+ return part_devt(part);
+}
+#endif
+
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0))
+static
+int lttng_statedump_each_block_device(struct lttng_session *session, struct gendisk *disk)
+{
+ struct block_device *part;
+ unsigned long idx;
+ int ret = 0;
+
+ /* Include partition 0 */
+ idx = 0;
+
+ rcu_read_lock();
+ xa_for_each(&disk->part_tbl, idx, part) {
+ char name_buf[BDEVNAME_SIZE];
+
+ /* Exclude non-partitions bdev and empty partitions. */
+ if (bdev_is_partition(part) && !bdev_nr_sectors(part))
+ continue;
+
+ if (lttng_get_part_name(disk, part, name_buf) == -ENOSYS) {
+ ret = -ENOSYS;
+ goto end;
+ }
+ trace_lttng_statedump_block_device(session, lttng_get_part_devt(part),
+ name_buf);
+ }
+end:
+ rcu_read_unlock();
+ return ret;
+}
+#else
+static
+int lttng_statedump_each_block_device(struct lttng_session *session, struct gendisk *disk)
+{
+ struct disk_part_iter piter;
+ LTTNG_PART_STRUCT_TYPE *part;
+
+ disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
+
+ while ((part = disk_part_iter_next(&piter))) {
+ char name_buf[BDEVNAME_SIZE];
+
+ if (lttng_get_part_name(disk, part, name_buf) == -ENOSYS) {
+ disk_part_iter_exit(&piter);
+ return -ENOSYS;
+ }
+ trace_lttng_statedump_block_device(session, lttng_get_part_devt(part),
+ name_buf);
+ }
+ disk_part_iter_exit(&piter);
+
+ return 0;
+}
+#endif
+
static
int lttng_enumerate_block_devices(struct lttng_session *session)
{
struct device_type *ptr_disk_type;
struct class_dev_iter iter;
struct device *dev;
+ int ret = 0;
ptr_block_class = wrapper_get_block_class();
- if (!ptr_block_class)
- return -ENOSYS;
+ if (!ptr_block_class) {
+ ret = -ENOSYS;
+ goto end;
+ }
ptr_disk_type = wrapper_get_disk_type();
if (!ptr_disk_type) {
- return -ENOSYS;
+ ret = -ENOSYS;
+ goto end;
}
class_dev_iter_init(&iter, ptr_block_class, NULL, ptr_disk_type);
while ((dev = class_dev_iter_next(&iter))) {
- struct disk_part_iter piter;
struct gendisk *disk = dev_to_disk(dev);
- struct hd_struct *part;
/*
* Don't show empty devices or things that have been
(disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO))
continue;
- disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
- while ((part = disk_part_iter_next(&piter))) {
- char name_buf[BDEVNAME_SIZE];
- char *p;
-
- p = wrapper_disk_name(disk, part->partno, name_buf);
- if (!p) {
- disk_part_iter_exit(&piter);
- class_dev_iter_exit(&iter);
- return -ENOSYS;
- }
- trace_lttng_statedump_block_device(session,
- part_devt(part), name_buf);
- }
- disk_part_iter_exit(&piter);
+ ret = lttng_statedump_each_block_device(session, disk);
}
class_dev_iter_exit(&iter);
- return 0;
+end:
+ return ret;
}
#ifdef CONFIG_INET
#ifdef CONFIG_LTTNG_HAS_LIST_IRQ
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39))
+#if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(2,6,39))
#define irq_desc_get_chip(desc) get_irq_desc_chip(desc)
#endif
do {
trace_lttng_statedump_process_state(session,
p, type, mode, submode, status, pid_ns);
- pid_ns = pid_ns->parent;
+ pid_ns = pid_ns ? pid_ns->parent : NULL;
} while (pid_ns);
}
status = LTTNG_ZOMBIE;
else if (p->exit_state == EXIT_DEAD)
status = LTTNG_DEAD;
- else if (p->state == TASK_RUNNING) {
+ else if (lttng_task_is_running(p)) {
/* Is this a forked child that has not run yet? */
if (list_empty(&p->rt.run_list))
status = LTTNG_WAIT_FORK;
* was really running at this time.
*/
status = LTTNG_WAIT_CPU;
- } else if (p->state &
+ } else if (lttng_get_task_state(p) &
(TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)) {
/* Task is waiting for something to complete */
status = LTTNG_WAIT;
MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("Jean-Hugues Deschenes");
-MODULE_DESCRIPTION("Linux Trace Toolkit Next Generation Statedump");
+MODULE_DESCRIPTION("LTTng statedump provider");
MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "."
__stringify(LTTNG_MODULES_MINOR_VERSION) "."
__stringify(LTTNG_MODULES_PATCHLEVEL_VERSION)
projects / lttng-modules.git / blobdiff