#include <linux/debugfs.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/clnt.h>
#include "netns.h"
#include "fail.h"
static struct dentry *topdir;
static struct dentry *rpc_clnt_dir;
static struct dentry *rpc_xprt_dir;
static int
tasks_show(struct seq_file *f, void *v)
{
u32 xid = 0;
struct rpc_task *task = v;
struct rpc_clnt *clnt = task->tk_client;
const char *rpc_waitq = "none";
if (RPC_IS_QUEUED(task))
rpc_waitq = rpc_qname(task->tk_waitqueue);
if (task->tk_rqstp)
xid = be32_to_cpu(task->tk_rqstp->rq_xid);
seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
task->tk_pid, task->tk_flags, task->tk_status,
clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops,
clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),
task->tk_action, rpc_waitq);
return 0;
}
static void *
tasks_start(struct seq_file *f, loff_t *ppos)
__acquires(&clnt->cl_lock)
{
struct rpc_clnt *clnt = f->private;
loff_t pos = *ppos;
struct rpc_task *task;
spin_lock(&clnt->cl_lock);
list_for_each_entry(task, &clnt->cl_tasks, tk_task)
if (pos-- == 0)
return task;
return NULL;
}
static void *
tasks_next(struct seq_file *f, void *v, loff_t *pos)
{
struct rpc_clnt *clnt = f->private;
struct rpc_task *task = v;
struct list_head *next = task->tk_task.next;
++*pos;
if (next == &clnt->cl_tasks)
return NULL;
return list_entry(next, struct rpc_task, tk_task);
}
static void
tasks_stop(struct seq_file *f, void *v)
__releases(&clnt->cl_lock)
{
struct rpc_clnt *clnt = f->private;
spin_unlock(&clnt->cl_lock);
seq_printf(f, "clnt[%pISpc] RPC tasks[%d]\n",
(struct sockaddr *)&clnt->cl_xprt->addr,
atomic_read(&clnt->cl_task_count));
}
static const struct seq_operations tasks_seq_operations = {
.start = tasks_start,
.next = tasks_next,
.stop = tasks_stop,
.show = tasks_show,
};
static int tasks_open(struct inode *inode, struct file *filp)
{
int ret = seq_open(filp, &tasks_seq_operations);
if (!ret) {
struct seq_file *seq = filp->private_data;
struct rpc_clnt *clnt = seq->private = inode->i_private;
if (!refcount_inc_not_zero(&clnt->cl_count)) {
seq_release(inode, filp);
ret = -EINVAL;
}
}
return ret;
}
static int
tasks_release(struct inode *inode, struct file *filp)
{
struct seq_file *seq = filp->private_data;
struct rpc_clnt *clnt = seq->private;
rpc_release_client(clnt);
return seq_release(inode, filp);
}
static const struct file_operations tasks_fops = {
.owner = THIS_MODULE,
.open = tasks_open,
.read = seq_read,
.llseek = seq_lseek,
.release = tasks_release,
};
static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *numv)
{
int len;
char name[24];
char link[9];
int *nump = numv;
if (IS_ERR_OR_NULL(xprt->debugfs))
return 0;
len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
xprt->debugfs->d_name.name);
if (len >= sizeof(name))
return -1;
if (*nump == 0)
strcpy(link, "xprt");
else {
len = snprintf(link, sizeof(link), "xprt%d", *nump);
if (len >= sizeof(link))
return -1;
}
debugfs_create_symlink(link, clnt->cl_debugfs, name);
(*nump)++;
return 0;
}
void
rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
{
int len;
char name[9];
int xprtnum = 0;
len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
if (len >= sizeof(name))
return;
clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs, clnt,
&tasks_fops);
rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum);
}
void
rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
{
debugfs_remove_recursive(clnt->cl_debugfs);
clnt->cl_debugfs = NULL;
}
static int
xprt_info_show(struct seq_file *f, void *v)
{
struct rpc_xprt *xprt = f->private;
seq_printf(f, "netid: %s\n", xprt->address_strings[RPC_DISPLAY_NETID]);
seq_printf(f, "addr: %s\n", xprt->address_strings[RPC_DISPLAY_ADDR]);
seq_printf(f, "port: %s\n", xprt->address_strings[RPC_DISPLAY_PORT]);
seq_printf(f, "state: 0x%lx\n", xprt->state);
seq_printf(f, "netns: %u\n", xprt->xprt_net->ns.inum);
if (xprt->ops->get_srcaddr) {
int ret, buflen;
char buf[INET6_ADDRSTRLEN];
buflen = ARRAY_SIZE(buf);
ret = xprt->ops->get_srcaddr(xprt, buf, buflen);
if (ret < 0)
ret = sprintf(buf, "<closed>");
seq_printf(f, "saddr: %.*s\n", ret, buf);
}
return 0;
}
static int
xprt_info_open(struct inode *inode, struct file *filp)
{
int ret;
struct rpc_xprt *xprt = inode->i_private;
ret = single_open(filp, xprt_info_show, xprt);
if (!ret) {
if (!xprt_get(xprt)) {
single_release(inode, filp);
ret = -EINVAL;
}
}
return ret;
}
static int
xprt_info_release(struct inode *inode, struct file *filp)
{
struct rpc_xprt *xprt = inode->i_private;
xprt_put(xprt);
return single_release(inode, filp);
}
static const struct file_operations xprt_info_fops = {
.owner = THIS_MODULE,
.open = xprt_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = xprt_info_release,
};
void
rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
{
int len, id;
static atomic_t cur_id;
char name[9];
id = (unsigned int)atomic_inc_return(&cur_id);
len = snprintf(name, sizeof(name), "%x", id);
if (len >= sizeof(name))
return;
xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs, xprt,
&xprt_info_fops);
}
void
rpc_xprt_debugfs_unregister(struct rpc_xprt *xprt)
{
debugfs_remove_recursive(xprt->debugfs);
xprt->debugfs = NULL;
}
#if IS_ENABLED(CONFIG_FAIL_SUNRPC)
struct fail_sunrpc_attr fail_sunrpc = {
.attr = FAULT_ATTR_INITIALIZER,
};
EXPORT_SYMBOL_GPL(fail_sunrpc);
static void fail_sunrpc_init(void)
{
struct dentry *dir;
dir = fault_create_debugfs_attr("fail_sunrpc", NULL,
&fail_sunrpc.attr);
debugfs_create_bool("ignore-client-disconnect", S_IFREG | 0600, dir,
&fail_sunrpc.ignore_client_disconnect);
debugfs_create_bool("ignore-server-disconnect", S_IFREG | 0600, dir,
&fail_sunrpc.ignore_server_disconnect);
debugfs_create_bool("ignore-cache-wait", S_IFREG | 0600, dir,
&fail_sunrpc.ignore_cache_wait);
}
#else
static void fail_sunrpc_init(void)
{
}
#endif
void __exit
sunrpc_debugfs_exit(void)
{
debugfs_remove_recursive(topdir);
topdir = NULL;
rpc_clnt_dir = NULL;
rpc_xprt_dir = NULL;
}
void __init
sunrpc_debugfs_init(void)
{
topdir = debugfs_create_dir("sunrpc", NULL);
rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
rpc_xprt_dir = debugfs_create_dir("rpc_xprt", topdir);
fail_sunrpc_init();
}
