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