Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * debugfs interface for sunrpc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (c) 2014 Jeff Layton <jlayton@primarydata.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/sunrpc/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/sunrpc/clnt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "netns.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static struct dentry *topdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) static struct dentry *rpc_clnt_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) static struct dentry *rpc_xprt_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) unsigned int rpc_inject_disconnect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) tasks_show(struct seq_file *f, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	u32 xid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct rpc_task *task = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct rpc_clnt *clnt = task->tk_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	const char *rpc_waitq = "none";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	if (RPC_IS_QUEUED(task))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		rpc_waitq = rpc_qname(task->tk_waitqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (task->tk_rqstp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		xid = be32_to_cpu(task->tk_rqstp->rq_xid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	seq_printf(f, "%5u %04x %6d 0x%x 0x%x %8ld %ps %sv%u %s a:%ps q:%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		task->tk_pid, task->tk_flags, task->tk_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		clnt->cl_clid, xid, rpc_task_timeout(task), task->tk_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		clnt->cl_program->name, clnt->cl_vers, rpc_proc_name(task),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		task->tk_action, rpc_waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) tasks_start(struct seq_file *f, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	__acquires(&clnt->cl_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct rpc_clnt *clnt = f->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	loff_t pos = *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct rpc_task *task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	spin_lock(&clnt->cl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	list_for_each_entry(task, &clnt->cl_tasks, tk_task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		if (pos-- == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			return task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) static void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) tasks_next(struct seq_file *f, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct rpc_clnt *clnt = f->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct rpc_task *task = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct list_head *next = task->tk_task.next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	/* If there's another task on list, return it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (next == &clnt->cl_tasks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return list_entry(next, struct rpc_task, tk_task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) tasks_stop(struct seq_file *f, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	__releases(&clnt->cl_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct rpc_clnt *clnt = f->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	spin_unlock(&clnt->cl_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static const struct seq_operations tasks_seq_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	.start	= tasks_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	.next	= tasks_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	.stop	= tasks_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	.show	= tasks_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int tasks_open(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	int ret = seq_open(filp, &tasks_seq_operations);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		struct seq_file *seq = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		struct rpc_clnt *clnt = seq->private = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		if (!atomic_inc_not_zero(&clnt->cl_count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			seq_release(inode, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) tasks_release(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct seq_file *seq = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct rpc_clnt *clnt = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	rpc_release_client(clnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return seq_release(inode, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static const struct file_operations tasks_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	.open		= tasks_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	.read		= seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	.llseek		= seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	.release	= tasks_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *numv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	char link[9]; /* enough for 8 hex digits + NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int *nump = numv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (IS_ERR_OR_NULL(xprt->debugfs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		       xprt->debugfs->d_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	if (len >= sizeof(name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (*nump == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		strcpy(link, "xprt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		len = snprintf(link, sizeof(link), "xprt%d", *nump);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		if (len >= sizeof(link))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	debugfs_create_symlink(link, clnt->cl_debugfs, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	(*nump)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	char name[9]; /* enough for 8 hex digits + NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	int xprtnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	len = snprintf(name, sizeof(name), "%x", clnt->cl_clid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (len >= sizeof(name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	/* make the per-client dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	clnt->cl_debugfs = debugfs_create_dir(name, rpc_clnt_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* make tasks file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	debugfs_create_file("tasks", S_IFREG | 0400, clnt->cl_debugfs, clnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			    &tasks_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	debugfs_remove_recursive(clnt->cl_debugfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	clnt->cl_debugfs = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) xprt_info_show(struct seq_file *f, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct rpc_xprt *xprt = f->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	seq_printf(f, "netid: %s\n", xprt->address_strings[RPC_DISPLAY_NETID]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	seq_printf(f, "addr:  %s\n", xprt->address_strings[RPC_DISPLAY_ADDR]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	seq_printf(f, "port:  %s\n", xprt->address_strings[RPC_DISPLAY_PORT]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	seq_printf(f, "state: 0x%lx\n", xprt->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) xprt_info_open(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct rpc_xprt *xprt = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	ret = single_open(filp, xprt_info_show, xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (!xprt_get(xprt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			single_release(inode, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) xprt_info_release(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	struct rpc_xprt *xprt = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	xprt_put(xprt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	return single_release(inode, filp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static const struct file_operations xprt_info_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	.open		= xprt_info_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	.read		= seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	.llseek		= seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	.release	= xprt_info_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) rpc_xprt_debugfs_register(struct rpc_xprt *xprt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	int len, id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	static atomic_t	cur_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	char		name[9]; /* 8 hex digits + NULL term */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	id = (unsigned int)atomic_inc_return(&cur_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	len = snprintf(name, sizeof(name), "%x", id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (len >= sizeof(name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	/* make the per-client dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	xprt->debugfs = debugfs_create_dir(name, rpc_xprt_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	/* make tasks file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	debugfs_create_file("info", S_IFREG | 0400, xprt->debugfs, xprt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			    &xprt_info_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	atomic_set(&xprt->inject_disconnect, rpc_inject_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) rpc_xprt_debugfs_unregister(struct rpc_xprt *xprt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	debugfs_remove_recursive(xprt->debugfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	xprt->debugfs = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) fault_open(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	filp->private_data = kmalloc(128, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (!filp->private_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) fault_release(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	kfree(filp->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) fault_disconnect_read(struct file *filp, char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		      size_t len, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	char *buffer = (char *)filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	size = sprintf(buffer, "%u\n", rpc_inject_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return simple_read_from_buffer(user_buf, len, offset, buffer, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) fault_disconnect_write(struct file *filp, const char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		       size_t len, loff_t *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	char buffer[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (len >= sizeof(buffer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		len = sizeof(buffer) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (copy_from_user(buffer, user_buf, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	buffer[len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	if (kstrtouint(buffer, 10, &rpc_inject_disconnect))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static const struct file_operations fault_disconnect_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.open		= fault_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.read		= fault_disconnect_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.write		= fault_disconnect_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.release	= fault_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) void __exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) sunrpc_debugfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	debugfs_remove_recursive(topdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	topdir = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	rpc_clnt_dir = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	rpc_xprt_dir = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) void __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) sunrpc_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct dentry *rpc_fault_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	topdir = debugfs_create_dir("sunrpc", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	rpc_clnt_dir = debugfs_create_dir("rpc_clnt", topdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	rpc_xprt_dir = debugfs_create_dir("rpc_xprt", topdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	rpc_fault_dir = debugfs_create_dir("inject_fault", topdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	debugfs_create_file("disconnect", S_IFREG | 0400, rpc_fault_dir, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 			    &fault_disconnect_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }