1#include <linux/file.h>
2#include <linux/fs.h>
3#include <linux/fsnotify_backend.h>
4#include <linux/idr.h>
5#include <linux/init.h>
6#include <linux/inotify.h>
7#include <linux/fanotify.h>
8#include <linux/kernel.h>
9#include <linux/namei.h>
10#include <linux/sched.h>
11#include <linux/types.h>
12#include <linux/seq_file.h>
13#include <linux/proc_fs.h>
14#include <linux/exportfs.h>
15
16#include "inotify/inotify.h"
17#include "../fs/mount.h"
18
19#if defined(CONFIG_PROC_FS)
20
21#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
22
23static void show_fdinfo(struct seq_file *m, struct file *f,
24 void (*show)(struct seq_file *m,
25 struct fsnotify_mark *mark))
26{
27 struct fsnotify_group *group = f->private_data;
28 struct fsnotify_mark *mark;
29
30 mutex_lock(&group->mark_mutex);
31 list_for_each_entry(mark, &group->marks_list, g_list) {
32 show(m, mark);
33 if (seq_has_overflowed(m))
34 break;
35 }
36 mutex_unlock(&group->mark_mutex);
37}
38
39#if defined(CONFIG_EXPORTFS)
40static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
41{
42 struct {
43 struct file_handle handle;
44 u8 pad[MAX_HANDLE_SZ];
45 } f;
46 int size, ret, i;
47
48 f.handle.handle_bytes = sizeof(f.pad);
49 size = f.handle.handle_bytes >> 2;
50
51 ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0);
52 if ((ret == FILEID_INVALID) || (ret < 0)) {
53 WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
54 return;
55 }
56
57 f.handle.handle_type = ret;
58 f.handle.handle_bytes = size * sizeof(u32);
59
60 seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
61 f.handle.handle_bytes, f.handle.handle_type);
62
63 for (i = 0; i < f.handle.handle_bytes; i++)
64 seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
65}
66#else
67static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
68{
69}
70#endif
71
72#ifdef CONFIG_INOTIFY_USER
73
74static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
75{
76 struct inotify_inode_mark *inode_mark;
77 struct inode *inode;
78
79 if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE)))
80 return;
81
82 inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
83 inode = igrab(mark->inode);
84 if (inode) {
85 seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:%x ",
86 inode_mark->wd, inode->i_ino, inode->i_sb->s_dev,
87 mark->mask, mark->ignored_mask);
88 show_mark_fhandle(m, inode);
89 seq_putc(m, '\n');
90 iput(inode);
91 }
92}
93
94void inotify_show_fdinfo(struct seq_file *m, struct file *f)
95{
96 show_fdinfo(m, f, inotify_fdinfo);
97}
98
99#endif
100
101#ifdef CONFIG_FANOTIFY
102
103static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
104{
105 unsigned int mflags = 0;
106 struct inode *inode;
107
108 if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE))
109 return;
110
111 if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
112 mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
113
114 if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
115 inode = igrab(mark->inode);
116 if (!inode)
117 return;
118 seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ",
119 inode->i_ino, inode->i_sb->s_dev,
120 mflags, mark->mask, mark->ignored_mask);
121 show_mark_fhandle(m, inode);
122 seq_putc(m, '\n');
123 iput(inode);
124 } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) {
125 struct mount *mnt = real_mount(mark->mnt);
126
127 seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n",
128 mnt->mnt_id, mflags, mark->mask, mark->ignored_mask);
129 }
130}
131
132void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
133{
134 struct fsnotify_group *group = f->private_data;
135 unsigned int flags = 0;
136
137 switch (group->priority) {
138 case FS_PRIO_0:
139 flags |= FAN_CLASS_NOTIF;
140 break;
141 case FS_PRIO_1:
142 flags |= FAN_CLASS_CONTENT;
143 break;
144 case FS_PRIO_2:
145 flags |= FAN_CLASS_PRE_CONTENT;
146 break;
147 }
148
149 if (group->max_events == UINT_MAX)
150 flags |= FAN_UNLIMITED_QUEUE;
151
152 if (group->fanotify_data.max_marks == UINT_MAX)
153 flags |= FAN_UNLIMITED_MARKS;
154
155 seq_printf(m, "fanotify flags:%x event-flags:%x\n",
156 flags, group->fanotify_data.f_flags);
157
158 show_fdinfo(m, f, fanotify_fdinfo);
159}
160
161#endif
162
163#endif
164
165#endif
166