From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- net/9p/mod.c | 212 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 net/9p/mod.c (limited to 'net/9p/mod.c') diff --git a/net/9p/mod.c b/net/9p/mod.c new file mode 100644 index 000000000..85160b52d --- /dev/null +++ b/net/9p/mod.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 9P entry point + * + * Copyright (C) 2007 by Latchesar Ionkov + * Copyright (C) 2004 by Eric Van Hensbergen + * Copyright (C) 2002 by Ron Minnich + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef CONFIG_NET_9P_DEBUG +unsigned int p9_debug_level; /* feature-rific global debug level */ +EXPORT_SYMBOL(p9_debug_level); +module_param_named(debug, p9_debug_level, uint, 0); +MODULE_PARM_DESC(debug, "9P debugging level"); + +void _p9_debug(enum p9_debug_flags level, const char *func, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + if ((p9_debug_level & level) != level) + return; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + if (level == P9_DEBUG_9P) + pr_notice("(%8.8d) %pV", task_pid_nr(current), &vaf); + else + pr_notice("-- %s (%d): %pV", func, task_pid_nr(current), &vaf); + + va_end(args); +} +EXPORT_SYMBOL(_p9_debug); +#endif + +/* Dynamic Transport Registration Routines */ + +static DEFINE_SPINLOCK(v9fs_trans_lock); +static LIST_HEAD(v9fs_trans_list); + +/** + * v9fs_register_trans - register a new transport with 9p + * @m: structure describing the transport module and entry points + * + */ +void v9fs_register_trans(struct p9_trans_module *m) +{ + spin_lock(&v9fs_trans_lock); + list_add_tail(&m->list, &v9fs_trans_list); + spin_unlock(&v9fs_trans_lock); +} +EXPORT_SYMBOL(v9fs_register_trans); + +/** + * v9fs_unregister_trans - unregister a 9p transport + * @m: the transport to remove + * + */ +void v9fs_unregister_trans(struct p9_trans_module *m) +{ + spin_lock(&v9fs_trans_lock); + list_del_init(&m->list); + spin_unlock(&v9fs_trans_lock); +} +EXPORT_SYMBOL(v9fs_unregister_trans); + +static struct p9_trans_module *_p9_get_trans_by_name(const char *s) +{ + struct p9_trans_module *t, *found = NULL; + + spin_lock(&v9fs_trans_lock); + + list_for_each_entry(t, &v9fs_trans_list, list) + if (strcmp(t->name, s) == 0 && + try_module_get(t->owner)) { + found = t; + break; + } + + spin_unlock(&v9fs_trans_lock); + + return found; +} + +/** + * v9fs_get_trans_by_name - get transport with the matching name + * @s: string identifying transport + * + */ +struct p9_trans_module *v9fs_get_trans_by_name(const char *s) +{ + struct p9_trans_module *found = NULL; + + found = _p9_get_trans_by_name(s); + +#ifdef CONFIG_MODULES + if (!found) { + request_module("9p-%s", s); + found = _p9_get_trans_by_name(s); + } +#endif + + return found; +} +EXPORT_SYMBOL(v9fs_get_trans_by_name); + +static const char * const v9fs_default_transports[] = { + "virtio", "tcp", "fd", "unix", "xen", "rdma", +}; + +/** + * v9fs_get_default_trans - get the default transport + * + */ + +struct p9_trans_module *v9fs_get_default_trans(void) +{ + struct p9_trans_module *t, *found = NULL; + int i; + + spin_lock(&v9fs_trans_lock); + + list_for_each_entry(t, &v9fs_trans_list, list) + if (t->def && try_module_get(t->owner)) { + found = t; + break; + } + + if (!found) + list_for_each_entry(t, &v9fs_trans_list, list) + if (try_module_get(t->owner)) { + found = t; + break; + } + + spin_unlock(&v9fs_trans_lock); + + for (i = 0; !found && i < ARRAY_SIZE(v9fs_default_transports); i++) + found = v9fs_get_trans_by_name(v9fs_default_transports[i]); + + return found; +} +EXPORT_SYMBOL(v9fs_get_default_trans); + +/** + * v9fs_put_trans - put trans + * @m: transport to put + * + */ +void v9fs_put_trans(struct p9_trans_module *m) +{ + if (m) + module_put(m->owner); +} +EXPORT_SYMBOL(v9fs_put_trans); + +/** + * init_p9 - Initialize module + * + */ +static int __init init_p9(void) +{ + int ret; + + ret = p9_client_init(); + if (ret) + return ret; + + p9_error_init(); + pr_info("Installing 9P2000 support\n"); + + return ret; +} + +/** + * exit_p9 - shutdown module + * + */ + +static void __exit exit_p9(void) +{ + pr_info("Unloading 9P2000 support\n"); + + p9_client_exit(); +} + +module_init(init_p9) +module_exit(exit_p9) + +MODULE_AUTHOR("Latchesar Ionkov "); +MODULE_AUTHOR("Eric Van Hensbergen "); +MODULE_AUTHOR("Ron Minnich "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Plan 9 Resource Sharing Support (9P2000)"); -- cgit v1.3.1