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
|
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/fsnotify_backend.h>
#include <linux/idr.h>
#include <linux/init.h>
#include <linux/inotify.h>
#include <linux/fanotify.h>
#include <linux/kernel.h>
#include <linux/namei.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include <linux/exportfs.h>
#include "inotify/inotify.h"
#include "../fs/mount.h"
#if defined(CONFIG_PROC_FS)
#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
static int show_fdinfo(struct seq_file *m, struct file *f,
int (*show)(struct seq_file *m, struct fsnotify_mark *mark))
{
struct fsnotify_group *group = f->private_data;
struct fsnotify_mark *mark;
int ret = 0;
spin_lock(&group->mark_lock);
list_for_each_entry(mark, &group->marks_list, g_list) {
ret = show(m, mark);
if (ret)
break;
}
spin_unlock(&group->mark_lock);
return ret;
}
#if defined(CONFIG_EXPORTFS)
static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
{
struct {
struct file_handle handle;
u8 pad[64];
} f;
int size, ret, i;
f.handle.handle_bytes = sizeof(f.pad);
size = f.handle.handle_bytes >> 2;
ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0);
if ((ret == 255) || (ret == -ENOSPC)) {
WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
return 0;
}
f.handle.handle_type = ret;
f.handle.handle_bytes = size * sizeof(u32);
ret = seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
f.handle.handle_bytes, f.handle.handle_type);
for (i = 0; i < f.handle.handle_bytes; i++)
ret |= seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
return ret;
}
#else
static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
{
return 0;
}
#endif
#ifdef CONFIG_INOTIFY_USER
static int inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
{
struct inotify_inode_mark *inode_mark;
struct inode *inode;
int ret = 0;
if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE)))
return 0;
inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
inode = igrab(mark->i.inode);
if (inode) {
ret = seq_printf(m, "inotify wd:%x ino:%lx sdev:%x "
"mask:%x ignored_mask:%x ",
inode_mark->wd, inode->i_ino,
inode->i_sb->s_dev,
mark->mask, mark->ignored_mask);
ret |= show_mark_fhandle(m, inode);
ret |= seq_putc(m, '\n');
iput(inode);
}
return ret;
}
int inotify_show_fdinfo(struct seq_file *m, struct file *f)
{
return show_fdinfo(m, f, inotify_fdinfo);
}
#endif /* CONFIG_INOTIFY_USER */
#ifdef CONFIG_FANOTIFY
static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
{
unsigned int mflags = 0;
struct inode *inode;
int ret = 0;
if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE))
return 0;
if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
inode = igrab(mark->i.inode);
if (!inode)
goto out;
ret = seq_printf(m, "fanotify ino:%lx sdev:%x "
"mflags:%x mask:%x ignored_mask:%x ",
inode->i_ino, inode->i_sb->s_dev,
mflags, mark->mask, mark->ignored_mask);
ret |= show_mark_fhandle(m, inode);
ret |= seq_putc(m, '\n');
iput(inode);
} else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) {
struct mount *mnt = real_mount(mark->m.mnt);
ret = seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x "
"ignored_mask:%x\n", mnt->mnt_id, mflags,
mark->mask, mark->ignored_mask);
}
out:
return ret;
}
int fanotify_show_fdinfo(struct seq_file *m, struct file *f)
{
struct fsnotify_group *group = f->private_data;
unsigned int flags = 0;
switch (group->priority) {
case FS_PRIO_0:
flags |= FAN_CLASS_NOTIF;
break;
case FS_PRIO_1:
flags |= FAN_CLASS_CONTENT;
break;
case FS_PRIO_2:
flags |= FAN_CLASS_PRE_CONTENT;
break;
}
if (group->max_events == UINT_MAX)
flags |= FAN_UNLIMITED_QUEUE;
if (group->fanotify_data.max_marks == UINT_MAX)
flags |= FAN_UNLIMITED_MARKS;
seq_printf(m, "fanotify flags:%x event-flags:%x\n",
flags, group->fanotify_data.f_flags);
return show_fdinfo(m, f, fanotify_fdinfo);
}
#endif /* CONFIG_FANOTIFY */
#endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */
#endif /* CONFIG_PROC_FS */
|
