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Cyrill Gorcunovbe771962012-12-17 16:05:12 -08001#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
Joe Perchesa3816ab2014-09-29 16:08:25 -070023static void show_fdinfo(struct seq_file *m, struct file *f,
24 void (*show)(struct seq_file *m,
25 struct fsnotify_mark *mark))
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080026{
27 struct fsnotify_group *group = f->private_data;
28 struct fsnotify_mark *mark;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080029
Linus Torvalds96680d22012-12-20 20:11:52 -080030 mutex_lock(&group->mark_mutex);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080031 list_for_each_entry(mark, &group->marks_list, g_list) {
Joe Perchesa3816ab2014-09-29 16:08:25 -070032 show(m, mark);
33 if (seq_has_overflowed(m))
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080034 break;
35 }
Linus Torvalds96680d22012-12-20 20:11:52 -080036 mutex_unlock(&group->mark_mutex);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080037}
38
39#if defined(CONFIG_EXPORTFS)
Joe Perchesa3816ab2014-09-29 16:08:25 -070040static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080041{
42 struct {
43 struct file_handle handle;
Andrey Vagin1fc98d12014-09-09 14:51:04 -070044 u8 pad[MAX_HANDLE_SZ];
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080045 } 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);
Andrey Vagin7e882482014-09-09 14:51:06 -070052 if ((ret == FILEID_INVALID) || (ret < 0)) {
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080053 WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
Joe Perchesa3816ab2014-09-29 16:08:25 -070054 return;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080055 }
56
57 f.handle.handle_type = ret;
58 f.handle.handle_bytes = size * sizeof(u32);
59
Joe Perchesa3816ab2014-09-29 16:08:25 -070060 seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
61 f.handle.handle_bytes, f.handle.handle_type);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080062
63 for (i = 0; i < f.handle.handle_bytes; i++)
Joe Perchesa3816ab2014-09-29 16:08:25 -070064 seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080065}
66#else
Joe Perchesa3816ab2014-09-29 16:08:25 -070067static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080068{
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080069}
70#endif
71
72#ifdef CONFIG_INOTIFY_USER
73
Joe Perchesa3816ab2014-09-29 16:08:25 -070074static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080075{
76 struct inotify_inode_mark *inode_mark;
77 struct inode *inode;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080078
79 if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE)))
Joe Perchesa3816ab2014-09-29 16:08:25 -070080 return;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080081
82 inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
Jan Kara0809ab62014-12-12 16:58:36 -080083 inode = igrab(mark->inode);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080084 if (inode) {
Joe Perchesa3816ab2014-09-29 16:08:25 -070085 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');
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080090 iput(inode);
91 }
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080092}
93
Joe Perchesa3816ab2014-09-29 16:08:25 -070094void inotify_show_fdinfo(struct seq_file *m, struct file *f)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080095{
Joe Perchesa3816ab2014-09-29 16:08:25 -070096 show_fdinfo(m, f, inotify_fdinfo);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -080097}
98
99#endif /* CONFIG_INOTIFY_USER */
100
101#ifdef CONFIG_FANOTIFY
102
Joe Perchesa3816ab2014-09-29 16:08:25 -0700103static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800104{
Cyrill Gorcunove6dbcaf2012-12-17 16:05:16 -0800105 unsigned int mflags = 0;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800106 struct inode *inode;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800107
108 if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE))
Joe Perchesa3816ab2014-09-29 16:08:25 -0700109 return;
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800110
Cyrill Gorcunove6dbcaf2012-12-17 16:05:16 -0800111 if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
112 mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
113
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800114 if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
Jan Kara0809ab62014-12-12 16:58:36 -0800115 inode = igrab(mark->inode);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800116 if (!inode)
Joe Perchesa3816ab2014-09-29 16:08:25 -0700117 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');
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800123 iput(inode);
124 } else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) {
Jan Kara0809ab62014-12-12 16:58:36 -0800125 struct mount *mnt = real_mount(mark->mnt);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800126
Joe Perchesa3816ab2014-09-29 16:08:25 -0700127 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);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800129 }
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800130}
131
Joe Perchesa3816ab2014-09-29 16:08:25 -0700132void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800133{
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
Joe Perchesa3816ab2014-09-29 16:08:25 -0700158 show_fdinfo(m, f, fanotify_fdinfo);
Cyrill Gorcunovbe771962012-12-17 16:05:12 -0800159}
160
161#endif /* CONFIG_FANOTIFY */
162
163#endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */
164
165#endif /* CONFIG_PROC_FS */