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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2025, LG Electronics.
4 * Author(s): Hyunchul Lee <[email protected]>
5 * Copyright (C) 2025, Samsung Electronics.
6 * Author(s): Vedansh Bhardwaj <[email protected]>
7 */
8
9#include <linux/module.h>
10#include <linux/proc_fs.h>
11#include <linux/seq_file.h>
12
13#include "misc.h"
14#include "connection.h"
15#include "server.h"
16#include "stats.h"
17#include "smb_common.h"
18#include "smb2pdu.h"
19#include "vfs_cache.h"
20
21static struct proc_dir_entry *ksmbd_proc_fs;
22struct ksmbd_counters ksmbd_counters;
23
24struct proc_dir_entry *ksmbd_proc_create(const char *name,
25 int (*show)(struct seq_file *m, void *v),
26 void *v)
27{
28 return proc_create_single_data(name, 0400, ksmbd_proc_fs,
29 show, v);
30}
31
32void ksmbd_proc_show_flag_names(struct seq_file *m,
33 const struct ksmbd_const_name *table,
34 int count, unsigned int flags)
35{
36 unsigned int remaining = flags;
37 bool separator = false;
38 int i;
39
40 for (i = 0; i < count; i++) {
41 unsigned int flag = table[i].const_value;
42
43 if (!flag || (remaining & flag) != flag)
44 continue;
45 seq_printf(m, "%s%s", separator ? "," : "", table[i].name);
46 separator = true;
47 remaining &= ~flag;
48 }
49
50 if (remaining)
51 seq_printf(m, "%s0x%08x", separator ? "," : "", remaining);
52 else if (!separator)
53 seq_puts(m, "none");
54}
55
56const char *ksmbd_proc_const_name(const struct ksmbd_const_name *table,
57 int count, unsigned int const_value)
58{
59 int i;
60
61 for (i = 0; i < count; i++) {
62 if (table[i].const_value == const_value)
63 return table[i].name;
64 }
65 return NULL;
66}
67
68struct ksmbd_const_smb2_process_req {
69 unsigned int const_value;
70 const char *name;
71};
72
73static const struct ksmbd_const_smb2_process_req smb2_process_req[KSMBD_COUNTER_MAX_REQS] = {
74 {le16_to_cpu(SMB2_NEGOTIATE), "SMB2_NEGOTIATE"},
75 {le16_to_cpu(SMB2_SESSION_SETUP), "SMB2_SESSION_SETUP"},
76 {le16_to_cpu(SMB2_LOGOFF), "SMB2_LOGOFF"},
77 {le16_to_cpu(SMB2_TREE_CONNECT), "SMB2_TREE_CONNECT"},
78 {le16_to_cpu(SMB2_TREE_DISCONNECT), "SMB2_TREE_DISCONNECT"},
79 {le16_to_cpu(SMB2_CREATE), "SMB2_CREATE"},
80 {le16_to_cpu(SMB2_CLOSE), "SMB2_CLOSE"},
81 {le16_to_cpu(SMB2_FLUSH), "SMB2_FLUSH"},
82 {le16_to_cpu(SMB2_READ), "SMB2_READ"},
83 {le16_to_cpu(SMB2_WRITE), "SMB2_WRITE"},
84 {le16_to_cpu(SMB2_LOCK), "SMB2_LOCK"},
85 {le16_to_cpu(SMB2_IOCTL), "SMB2_IOCTL"},
86 {le16_to_cpu(SMB2_CANCEL), "SMB2_CANCEL"},
87 {le16_to_cpu(SMB2_ECHO), "SMB2_ECHO"},
88 {le16_to_cpu(SMB2_QUERY_DIRECTORY), "SMB2_QUERY_DIRECTORY"},
89 {le16_to_cpu(SMB2_CHANGE_NOTIFY), "SMB2_CHANGE_NOTIFY"},
90 {le16_to_cpu(SMB2_QUERY_INFO), "SMB2_QUERY_INFO"},
91 {le16_to_cpu(SMB2_SET_INFO), "SMB2_SET_INFO"},
92 {le16_to_cpu(SMB2_OPLOCK_BREAK), "SMB2_OPLOCK_BREAK"},
93};
94
95static const char *ksmbd_server_state_string(void)
96{
97 switch (READ_ONCE(server_conf.state)) {
98 case SERVER_STATE_STARTING_UP:
99 return "starting";
100 case SERVER_STATE_RUNNING:
101 return "running";
102 case SERVER_STATE_RESETTING:
103 return "resetting";
104 case SERVER_STATE_SHUTTING_DOWN:
105 return "shutdown";
106 default:
107 return "unknown";
108 }
109}
110
111static const char *ksmbd_signing_mode_string(void)
112{
113 switch (server_conf.signing) {
114 case KSMBD_CONFIG_OPT_DISABLED:
115 return "disabled";
116 case KSMBD_CONFIG_OPT_MANDATORY:
117 return "mandatory";
118 case KSMBD_CONFIG_OPT_AUTO:
119 return "auto";
120 default:
121 return "unknown";
122 }
123}
124
125static void proc_show_runtime_totals(struct seq_file *m)
126{
127 struct ksmbd_conn *conn;
128 unsigned int clients = 0;
129 unsigned int open_files = 0;
130 int i;
131
132 down_read(&conn_list_lock);
133 hash_for_each(conn_list, i, conn, hlist) {
134 clients++;
135 open_files += atomic_read(&conn->stats.open_files_count);
136 }
137 up_read(&conn_list_lock);
138
139 seq_printf(m, "clients:\t%u\n", clients);
140 seq_printf(m, "open_files:\t%u\n", open_files);
141}
142
143static int proc_show_ksmbd_stats(struct seq_file *m, void *v)
144{
145 int i;
146
147 seq_puts(m, "Server\n");
148 seq_printf(m, "state:\t%s\n", ksmbd_server_state_string());
149 seq_printf(m, "name:\t%s\n", ksmbd_server_string());
150 seq_printf(m, "netbios:\t%s\n", ksmbd_netbios_name());
151 seq_printf(m, "work_group:\t%s\n", ksmbd_work_group());
152 seq_printf(m, "min_protocol:\t%s\n", ksmbd_get_protocol_string(server_conf.min_protocol));
153 seq_printf(m, "max_protocol:\t%s\n", ksmbd_get_protocol_string(server_conf.max_protocol));
154 seq_printf(m, "flags:\t0x%08x\n", server_conf.flags);
155 seq_printf(m, "tcp_port:\t%u\n", server_conf.tcp_port);
156 seq_printf(m, "signing:\t%s\n", ksmbd_signing_mode_string());
157 seq_printf(m, "signing_enforced:\t%s\n",
158 server_conf.enforced_signing ? "yes" : "no");
159 seq_printf(m, "bind_interfaces_only:\t%s\n",
160 server_conf.bind_interfaces_only ? "yes" : "no");
161 seq_printf(m, "max_connections:\t%u\n", server_conf.max_connections);
162 seq_printf(m, "max_connections_per_ip:\t%u\n",
163 server_conf.max_ip_connections);
164 seq_printf(m, "max_inflight_requests:\t%u\n",
165 server_conf.max_inflight_req);
166 seq_printf(m, "deadtime_seconds:\t%lu\n", server_conf.deadtime / HZ);
167 seq_printf(m, "ipc_timeout_seconds:\t%u\n", server_conf.ipc_timeout / HZ);
168 if (server_conf.ipc_last_active)
169 seq_printf(m, "ipc_last_active_seconds:\t%lu\n",
170 jiffies_to_msecs(jiffies - server_conf.ipc_last_active) /
171 MSEC_PER_SEC);
172 else
173 seq_puts(m, "ipc_last_active_seconds:\tnever\n");
174 seq_printf(m, "durable_scavenger:\t%s\n",
175 ksmbd_durable_scavenger_active() ? "running" : "stopped");
176 seq_printf(m, "share_fake_fscaps:\t0x%08x\n",
177 server_conf.share_fake_fscaps);
178 proc_show_runtime_totals(m);
179 seq_printf(m, "sessions:\t%lld\n",
180 ksmbd_counter_sum(KSMBD_COUNTER_SESSIONS));
181 seq_printf(m, "session_timeouts:\t%lld\n",
182 ksmbd_counter_sum(KSMBD_COUNTER_SESSION_TIMEOUTS));
183 seq_printf(m, "tree_connects:\t%lld\n",
184 ksmbd_counter_sum(KSMBD_COUNTER_TREE_CONNS));
185 seq_printf(m, "requests:\t%lld\n",
186 ksmbd_counter_sum(KSMBD_COUNTER_REQUESTS));
187 seq_printf(m, "read_bytes:\t%lld\n",
188 ksmbd_counter_sum(KSMBD_COUNTER_READ_BYTES));
189 seq_printf(m, "written_bytes:\t%lld\n",
190 ksmbd_counter_sum(KSMBD_COUNTER_WRITE_BYTES));
191
192 seq_puts(m, "\nSMB2\n");
193 for (i = 0; i < KSMBD_COUNTER_MAX_REQS; i++)
194 seq_printf(m, "%s:\t%lld\n", smb2_process_req[i].name,
195 ksmbd_counter_sum(KSMBD_COUNTER_FIRST_REQ + i));
196
197 seq_puts(m, "\nSMB2 status\n");
198 seq_printf(m, "success:\t%lld\n",
199 ksmbd_counter_sum(KSMBD_COUNTER_STATUS_SUCCESS));
200 seq_printf(m, "informational:\t%lld\n",
201 ksmbd_counter_sum(KSMBD_COUNTER_STATUS_INFORMATIONAL));
202 seq_printf(m, "warning:\t%lld\n",
203 ksmbd_counter_sum(KSMBD_COUNTER_STATUS_WARNING));
204 seq_printf(m, "error:\t%lld\n",
205 ksmbd_counter_sum(KSMBD_COUNTER_STATUS_ERROR));
206 seq_printf(m, "access_denied:\t%lld\n",
207 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_ACCESS_DENIED));
208 seq_printf(m, "not_found:\t%lld\n",
209 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_NOT_FOUND));
210 seq_printf(m, "invalid_parameter:\t%lld\n",
211 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_INVALID_PARAMETER));
212 seq_printf(m, "sharing_violation:\t%lld\n",
213 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_SHARING_VIOLATION));
214 seq_printf(m, "not_supported:\t%lld\n",
215 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_NOT_SUPPORTED));
216 seq_printf(m, "other:\t%lld\n",
217 ksmbd_counter_sum(KSMBD_COUNTER_ERROR_OTHER));
218 return 0;
219}
220
221void ksmbd_proc_cleanup(void)
222{
223 int i;
224
225 if (!ksmbd_proc_fs)
226 return;
227
228 proc_remove(ksmbd_proc_fs);
229
230 for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++)
231 percpu_counter_destroy(&ksmbd_counters.counters[i]);
232
233 ksmbd_proc_fs = NULL;
234}
235
236void ksmbd_proc_reset(void)
237{
238 int i;
239
240 for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++)
241 percpu_counter_set(&ksmbd_counters.counters[i], 0);
242}
243
244int ksmbd_proc_init(void)
245{
246 int i;
247 int retval = -ENOMEM;
248
249 ksmbd_proc_fs = proc_mkdir("fs/ksmbd", NULL);
250 if (!ksmbd_proc_fs)
251 return retval;
252
253 if (!proc_mkdir_mode("sessions", 0400, ksmbd_proc_fs))
254 goto err_out;
255
256 for (i = 0; i < ARRAY_SIZE(ksmbd_counters.counters); i++) {
257 retval = percpu_counter_init(&ksmbd_counters.counters[i], 0, GFP_KERNEL);
258 if (retval)
259 goto err_out;
260 }
261
262 if (!ksmbd_proc_create("server", proc_show_ksmbd_stats, NULL)) {
263 retval = -ENOMEM;
264 goto err_out;
265 }
266
267 ksmbd_proc_reset();
268 return 0;
269err_out:
270 ksmbd_proc_cleanup();
271 return retval;
272}