X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Flttng-statedump-impl.c;h=0593f4c8bd22ee3e6fbd62f2535ba08a4e97eff0;hb=a6837bed45b070b8a90292f92e3adc81c974e324;hp=394f661861a88a8f00a52002b2440112b9df2b68;hpb=8cdc1a8180681ebd144f8c0009e76cdc7331b36a;p=lttng-modules.git diff --git a/src/lttng-statedump-impl.c b/src/lttng-statedump-impl.c index 394f6618..0593f4c8 100644 --- a/src/lttng-statedump-impl.c +++ b/src/lttng-statedump-impl.c @@ -22,31 +22,27 @@ #include #include #include +#include #include -#include #include #include -#include #include #include #include #include #include +#include + #include #include +#include #include #include -#include -#include #include -#include -#include +#include #include - -#ifdef CONFIG_LTTNG_HAS_LIST_IRQ -#include -#endif +#include /* Define the tracepoints, but do not build the probes */ #define CREATE_TRACE_POINTS @@ -195,7 +191,29 @@ enum lttng_process_status { }; -#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)) +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,0,0)) + +#define LTTNG_PART_STRUCT_TYPE struct block_device + +static +int lttng_get_part_name(struct gendisk *disk, struct block_device *part, char *name_buf) +{ + int ret; + + ret = snprintf(name_buf, BDEVNAME_SIZE, "%pg", part); + if (ret < 0 || ret >= BDEVNAME_SIZE) + return -ENOSYS; + + return 0; +} + +static +dev_t lttng_get_part_devt(struct block_device *part) +{ + return part->bd_dev; +} + +#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)) #define LTTNG_PART_STRUCT_TYPE struct block_device @@ -249,6 +267,61 @@ dev_t lttng_get_part_devt(struct hd_struct *part) } #endif +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0)) +static +int lttng_statedump_each_block_device(struct lttng_kernel_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_kernel_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_kernel_session *session) { @@ -270,41 +343,18 @@ int lttng_enumerate_block_devices(struct lttng_kernel_session *session) } 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); - LTTNG_PART_STRUCT_TYPE *part; /* * Don't show empty devices or things that have been * suppressed */ if (get_capacity(disk) == 0 || - (disk->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)) + (disk->flags & LTTNG_GENHD_FL_HIDDEN)) continue; - /* - * 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]; - - 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, - lttng_get_part_devt(part), name_buf); - } - wrapper_disk_part_iter_exit(&piter); + ret = lttng_statedump_each_block_device(session, disk); } -iter_exit: class_dev_iter_exit(&iter); end: return ret; @@ -378,7 +428,7 @@ int lttng_dump_one_fd(const void *p, struct file *file, unsigned int fd) * the lock is taken, but we are not aware whether this is * guaranteed or not, so play safe. */ - if (fd < fdt->max_fds && lttng_close_on_exec(fd, fdt)) + if (fd < fdt->max_fds && close_on_exec(fd, fdt)) flags |= O_CLOEXEC; if (IS_ERR(s)) { struct dentry *dentry = file->f_path.dentry; @@ -405,7 +455,7 @@ void lttng_enumerate_files(struct lttng_kernel_session *session, { struct lttng_fd_ctx ctx = { .page = tmp, .session = session, .files = files, }; - lttng_iterate_fd(files, 0, lttng_dump_one_fd, &ctx); + iterate_fd(files, 0, lttng_dump_one_fd, &ctx); } #ifdef LTTNG_HAVE_STATEDUMP_CPU_TOPOLOGY @@ -454,7 +504,7 @@ void lttng_enumerate_task_vm_maps(struct lttng_kernel_session *session, down_read(&mm->mmap_sem); while (map) { if (map->vm_file) - ino = map->vm_file->lttng_f_dentry->d_inode->i_ino; + ino = map->vm_file->f_path.dentry->d_inode->i_ino; else ino = 0; trace_lttng_statedump_vm_map(session, p, map, ino); @@ -478,8 +528,6 @@ int lttng_enumerate_vm_maps(struct lttng_kernel_session *session) } #endif -#ifdef CONFIG_LTTNG_HAS_LIST_IRQ - static int lttng_list_interrupts(struct lttng_kernel_session *session) { @@ -506,13 +554,6 @@ int lttng_list_interrupts(struct lttng_kernel_session *session) return 0; #undef irq_to_desc } -#else -static inline -int lttng_list_interrupts(struct lttng_kernel_session *session) -{ - return 0; -} -#endif /* * Statedump the task's namespaces using the proc filesystem inode number as @@ -557,7 +598,7 @@ void lttng_statedump_process_ns(struct lttng_kernel_session *session, * paranoid behavior of * trace_lttng_statedump_process_user_ns(). */ - user_ns = user_ns ? user_ns->lttng_user_ns_parent : NULL; + user_ns = user_ns ? user_ns->parent : NULL; } while (user_ns); /* @@ -585,7 +626,8 @@ void lttng_statedump_process_ns(struct lttng_kernel_session *session, #endif trace_lttng_statedump_process_net_ns(session, p, proxy->net_ns); trace_lttng_statedump_process_uts_ns(session, p, proxy->uts_ns); -#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) || \ + LTTNG_RHEL_KERNEL_RANGE(4,18,0,305,0,0, 4,19,0,0,0,0)) trace_lttng_statedump_process_time_ns(session, p, proxy->time_ns); #endif } @@ -628,7 +670,7 @@ int lttng_enumerate_process_states(struct lttng_kernel_session *session) 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; @@ -639,7 +681,7 @@ int lttng_enumerate_process_states(struct lttng_kernel_session *session) * 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; @@ -737,7 +779,7 @@ int do_lttng_statedump(struct lttng_kernel_session *session) * is to guarantee that each CPU has been in a state where is was in * syscall mode (i.e. not in a trap, an IRQ or a soft IRQ). */ - get_online_cpus(); + lttng_cpus_read_lock(); atomic_set(&kernel_threads_to_run, num_online_cpus()); for_each_online_cpu(cpu) { INIT_DELAYED_WORK(&cpu_work[cpu], lttng_statedump_work_func); @@ -745,7 +787,7 @@ int do_lttng_statedump(struct lttng_kernel_session *session) } /* Wait for all threads to run */ __wait_event(statedump_wq, (atomic_read(&kernel_threads_to_run) == 0)); - put_online_cpus(); + lttng_cpus_read_unlock(); /* Our work is done */ trace_lttng_statedump_end(session); return 0; @@ -763,13 +805,6 @@ 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; }