X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-statedump-impl.c;h=6234403cfa25a8c3c1119f65ae6cf79a95a74fbf;hb=aeb710571db8b87d9de8d1a5e3a789d169baadcd;hp=37a4542e253ed35157746a84e2c776e80a278443;hpb=1c124020c743254923d8e76ab5dcd1f69709982e;p=lttng-modules.git diff --git a/lttng-statedump-impl.c b/lttng-statedump-impl.c index 37a4542e..6234403c 100644 --- a/lttng-statedump-impl.c +++ b/lttng-statedump-impl.c @@ -1,4 +1,5 @@ -/* +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * * lttng-statedump.c * * Linux Trace Toolkit Next Generation Kernel State Dump @@ -6,20 +7,6 @@ * Copyright 2005 Jean-Hugues Deschenes * Copyright 2006-2012 Mathieu Desnoyers * - * 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 @@ -41,7 +28,6 @@ #include #include #include -#include #include #include #include @@ -56,7 +42,7 @@ #include #include #include -#include +#include #ifdef CONFIG_LTTNG_HAS_LIST_IRQ #include @@ -69,13 +55,42 @@ #define LTTNG_INSTRUMENTATION #include -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; @@ -121,6 +136,61 @@ enum lttng_process_status { 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 + static int lttng_enumerate_block_devices(struct lttng_session *session) { @@ -128,19 +198,23 @@ 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; + LTTNG_PART_STRUCT_TYPE *part; /* * Don't show empty devices or things that have been @@ -150,24 +224,32 @@ int lttng_enumerate_block_devices(struct lttng_session *session) (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))) { + /* + * The original 'disk_part_iter_init' returns void, but our + * wrapper can fail to lookup the original symbol. + */ + if (wrapper_disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0) < 0) { + ret = -ENOSYS; + goto iter_exit; + } + + while ((part = wrapper_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; + if (lttng_get_part_name(disk, part, name_buf) == -ENOSYS) { + wrapper_disk_part_iter_exit(&piter); + ret = -ENOSYS; + goto iter_exit; } trace_lttng_statedump_block_device(session, - part_devt(part), name_buf); + lttng_get_part_devt(part), name_buf); } - disk_part_iter_exit(&piter); + wrapper_disk_part_iter_exit(&piter); } +iter_exit: class_dev_iter_exit(&iter); - return 0; +end: + return ret; } #ifdef CONFIG_INET @@ -342,7 +424,7 @@ int lttng_enumerate_vm_maps(struct lttng_session *session) #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 @@ -397,7 +479,7 @@ void lttng_statedump_process_ns(struct lttng_session *session, 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); }