1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * Procfs support for lockd 3 * Procfs support for lockd
4 * 4 *
5 * Copyright (c) 2014 Jeff Layton <jlayton@pri 5 * Copyright (c) 2014 Jeff Layton <jlayton@primarydata.com>
6 */ 6 */
7 7
8 #include <linux/fs.h> 8 #include <linux/fs.h>
9 #include <linux/proc_fs.h> 9 #include <linux/proc_fs.h>
10 #include <linux/module.h> 10 #include <linux/module.h>
11 #include <linux/nsproxy.h> 11 #include <linux/nsproxy.h>
12 #include <net/net_namespace.h> 12 #include <net/net_namespace.h>
13 13
14 #include "netns.h" 14 #include "netns.h"
15 #include "procfs.h" 15 #include "procfs.h"
16 16
17 /* 17 /*
18 * We only allow strings that start with 'Y', 18 * We only allow strings that start with 'Y', 'y', or '1'.
19 */ 19 */
20 static ssize_t 20 static ssize_t
21 nlm_end_grace_write(struct file *file, const c 21 nlm_end_grace_write(struct file *file, const char __user *buf, size_t size,
22 loff_t *pos) 22 loff_t *pos)
23 { 23 {
24 char *data; 24 char *data;
25 struct lockd_net *ln = net_generic(cur 25 struct lockd_net *ln = net_generic(current->nsproxy->net_ns,
26 loc 26 lockd_net_id);
27 27
28 if (size < 1) 28 if (size < 1)
29 return -EINVAL; 29 return -EINVAL;
30 30
31 data = simple_transaction_get(file, bu 31 data = simple_transaction_get(file, buf, size);
32 if (IS_ERR(data)) 32 if (IS_ERR(data))
33 return PTR_ERR(data); 33 return PTR_ERR(data);
34 34
35 switch(data[0]) { 35 switch(data[0]) {
36 case 'Y': 36 case 'Y':
37 case 'y': 37 case 'y':
38 case '1': 38 case '1':
39 locks_end_grace(&ln->lockd_man 39 locks_end_grace(&ln->lockd_manager);
40 break; 40 break;
41 default: 41 default:
42 return -EINVAL; 42 return -EINVAL;
43 } 43 }
44 44
45 return size; 45 return size;
46 } 46 }
47 47
48 static ssize_t 48 static ssize_t
49 nlm_end_grace_read(struct file *file, char __u 49 nlm_end_grace_read(struct file *file, char __user *buf, size_t size,
50 loff_t *pos) 50 loff_t *pos)
51 { 51 {
52 struct lockd_net *ln = net_generic(cur 52 struct lockd_net *ln = net_generic(current->nsproxy->net_ns,
53 loc 53 lockd_net_id);
54 char resp[3]; 54 char resp[3];
55 55
56 resp[0] = list_empty(&ln->lockd_manage 56 resp[0] = list_empty(&ln->lockd_manager.list) ? 'Y' : 'N';
57 resp[1] = '\n'; 57 resp[1] = '\n';
58 resp[2] = '\0'; 58 resp[2] = '\0';
59 59
60 return simple_read_from_buffer(buf, si 60 return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp));
61 } 61 }
62 62
63 static const struct proc_ops lockd_end_grace_p 63 static const struct proc_ops lockd_end_grace_proc_ops = {
64 .proc_write = nlm_end_grace_write, 64 .proc_write = nlm_end_grace_write,
65 .proc_read = nlm_end_grace_read, 65 .proc_read = nlm_end_grace_read,
66 .proc_lseek = default_llseek, 66 .proc_lseek = default_llseek,
67 .proc_release = simple_transaction_r 67 .proc_release = simple_transaction_release,
68 }; 68 };
69 69
70 int __init 70 int __init
71 lockd_create_procfs(void) 71 lockd_create_procfs(void)
72 { 72 {
73 struct proc_dir_entry *entry; 73 struct proc_dir_entry *entry;
74 74
75 entry = proc_mkdir("fs/lockd", NULL); 75 entry = proc_mkdir("fs/lockd", NULL);
76 if (!entry) 76 if (!entry)
77 return -ENOMEM; 77 return -ENOMEM;
78 entry = proc_create("nlm_end_grace", S 78 entry = proc_create("nlm_end_grace", S_IRUGO|S_IWUSR, entry,
79 &lockd_end_grace_p 79 &lockd_end_grace_proc_ops);
80 if (!entry) { 80 if (!entry) {
81 remove_proc_entry("fs/lockd", 81 remove_proc_entry("fs/lockd", NULL);
82 return -ENOMEM; 82 return -ENOMEM;
83 } 83 }
84 return 0; 84 return 0;
85 } 85 }
86 86
87 void __exit 87 void __exit
88 lockd_remove_procfs(void) 88 lockd_remove_procfs(void)
89 { 89 {
90 remove_proc_entry("fs/lockd/nlm_end_gr 90 remove_proc_entry("fs/lockd/nlm_end_grace", NULL);
91 remove_proc_entry("fs/lockd", NULL); 91 remove_proc_entry("fs/lockd", NULL);
92 } 92 }
93 93
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