1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
// SPDX-License-Identifier: GPL-2.0
/*
* DebugFS interface for the NVMe target.
* Copyright (c) 2022-2024 Shadow
* Copyright (c) 2024 SUSE LLC
*/
#include <linux/debugfs.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include "nvmet.h"
#include "debugfs.h"
struct dentry *nvmet_debugfs;
#define NVMET_DEBUGFS_ATTR(field) \
static int field##_open(struct inode *inode, struct file *file) \
{ return single_open(file, field##_show, inode->i_private); } \
\
static const struct file_operations field##_fops = { \
.open = field##_open, \
.read = seq_read, \
.release = single_release, \
}
#define NVMET_DEBUGFS_RW_ATTR(field) \
static int field##_open(struct inode *inode, struct file *file) \
{ return single_open(file, field##_show, inode->i_private); } \
\
static const struct file_operations field##_fops = { \
.open = field##_open, \
.read = seq_read, \
.write = field##_write, \
.release = single_release, \
}
static int nvmet_ctrl_hostnqn_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
seq_puts(m, ctrl->hostnqn);
return 0;
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_hostnqn);
static int nvmet_ctrl_kato_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
seq_printf(m, "%d\n", ctrl->kato);
return 0;
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_kato);
static int nvmet_ctrl_port_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
seq_printf(m, "%d\n", le16_to_cpu(ctrl->port->disc_addr.portid));
return 0;
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_port);
static const char *const csts_state_names[] = {
[NVME_CSTS_RDY] = "ready",
[NVME_CSTS_CFS] = "fatal",
[NVME_CSTS_NSSRO] = "reset",
[NVME_CSTS_SHST_OCCUR] = "shutdown",
[NVME_CSTS_SHST_CMPLT] = "completed",
[NVME_CSTS_PP] = "paused",
};
static int nvmet_ctrl_state_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
bool sep = false;
int i;
for (i = 0; i < 7; i++) {
int state = BIT(i);
if (!(ctrl->csts & state))
continue;
if (sep)
seq_puts(m, "|");
sep = true;
if (csts_state_names[state])
seq_puts(m, csts_state_names[state]);
else
seq_printf(m, "%d", state);
}
if (sep)
seq_printf(m, "\n");
return 0;
}
static ssize_t nvmet_ctrl_state_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct seq_file *m = file->private_data;
struct nvmet_ctrl *ctrl = m->private;
char reset[16];
if (count >= sizeof(reset))
return -EINVAL;
if (copy_from_user(reset, buf, count))
return -EFAULT;
if (!memcmp(reset, "fatal", 5))
nvmet_ctrl_fatal_error(ctrl);
else
return -EINVAL;
return count;
}
NVMET_DEBUGFS_RW_ATTR(nvmet_ctrl_state);
static int nvmet_ctrl_host_traddr_show(struct seq_file *m, void *p)
{
struct nvmet_ctrl *ctrl = m->private;
ssize_t size;
char buf[NVMF_TRADDR_SIZE + 1];
size = nvmet_ctrl_host_traddr(ctrl, buf, NVMF_TRADDR_SIZE);
if (size < 0) {
buf[0] = '\0';
size = 0;
}
buf[size] = '\0';
seq_printf(m, "%s\n", buf);
return 0;
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_host_traddr);
int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl)
{
char name[32];
struct dentry *parent = ctrl->subsys->debugfs_dir;
int ret;
if (!parent)
return -ENODEV;
snprintf(name, sizeof(name), "ctrl%d", ctrl->cntlid);
ctrl->debugfs_dir = debugfs_create_dir(name, parent);
if (IS_ERR(ctrl->debugfs_dir)) {
ret = PTR_ERR(ctrl->debugfs_dir);
ctrl->debugfs_dir = NULL;
return ret;
}
debugfs_create_file("port", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_port_fops);
debugfs_create_file("hostnqn", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_hostnqn_fops);
debugfs_create_file("kato", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_kato_fops);
debugfs_create_file("state", S_IRUSR | S_IWUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_state_fops);
debugfs_create_file("host_traddr", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_host_traddr_fops);
return 0;
}
void nvmet_debugfs_ctrl_free(struct nvmet_ctrl *ctrl)
{
debugfs_remove_recursive(ctrl->debugfs_dir);
}
int nvmet_debugfs_subsys_setup(struct nvmet_subsys *subsys)
{
int ret = 0;
subsys->debugfs_dir = debugfs_create_dir(subsys->subsysnqn,
nvmet_debugfs);
if (IS_ERR(subsys->debugfs_dir)) {
ret = PTR_ERR(subsys->debugfs_dir);
subsys->debugfs_dir = NULL;
}
return ret;
}
void nvmet_debugfs_subsys_free(struct nvmet_subsys *subsys)
{
debugfs_remove_recursive(subsys->debugfs_dir);
}
int __init nvmet_init_debugfs(void)
{
struct dentry *parent;
parent = debugfs_create_dir("nvmet", NULL);
if (IS_ERR(parent)) {
pr_warn("%s: failed to create debugfs directory\n", "nvmet");
return PTR_ERR(parent);
}
nvmet_debugfs = parent;
return 0;
}
void nvmet_exit_debugfs(void)
{
debugfs_remove_recursive(nvmet_debugfs);
}
|
