1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/file.h> |
3 | #include <linux/fs.h> |
4 | #include <linux/fsnotify_backend.h> |
5 | #include <linux/idr.h> |
6 | #include <linux/init.h> |
7 | #include <linux/inotify.h> |
8 | #include <linux/fanotify.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/namei.h> |
11 | #include <linux/sched.h> |
12 | #include <linux/types.h> |
13 | #include <linux/seq_file.h> |
14 | #include <linux/exportfs.h> |
15 | |
16 | #include "inotify/inotify.h" |
17 | #include "fanotify/fanotify.h" |
18 | #include "fdinfo.h" |
19 | #include "fsnotify.h" |
20 | |
21 | #if defined(CONFIG_PROC_FS) |
22 | |
23 | #if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY) |
24 | |
25 | static void show_fdinfo(struct seq_file *m, struct file *f, |
26 | void (*show)(struct seq_file *m, |
27 | struct fsnotify_mark *mark)) |
28 | { |
29 | struct fsnotify_group *group = f->private_data; |
30 | struct fsnotify_mark *mark; |
31 | |
32 | fsnotify_group_lock(group); |
33 | list_for_each_entry(mark, &group->marks_list, g_list) { |
34 | show(m, mark); |
35 | if (seq_has_overflowed(m)) |
36 | break; |
37 | } |
38 | fsnotify_group_unlock(group); |
39 | } |
40 | |
41 | #if defined(CONFIG_EXPORTFS) |
42 | static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
43 | { |
44 | struct { |
45 | struct file_handle handle; |
46 | u8 pad[MAX_HANDLE_SZ]; |
47 | } f; |
48 | int size, ret, i; |
49 | |
50 | f.handle.handle_bytes = sizeof(f.pad); |
51 | size = f.handle.handle_bytes >> 2; |
52 | |
53 | ret = exportfs_encode_fid(inode, fid: (struct fid *)f.handle.f_handle, max_len: &size); |
54 | if ((ret == FILEID_INVALID) || (ret < 0)) { |
55 | WARN_ONCE(1, "Can't encode file handler for inotify: %d\n" , ret); |
56 | return; |
57 | } |
58 | |
59 | f.handle.handle_type = ret; |
60 | f.handle.handle_bytes = size * sizeof(u32); |
61 | |
62 | seq_printf(m, fmt: "fhandle-bytes:%x fhandle-type:%x f_handle:" , |
63 | f.handle.handle_bytes, f.handle.handle_type); |
64 | |
65 | for (i = 0; i < f.handle.handle_bytes; i++) |
66 | seq_printf(m, fmt: "%02x" , (int)f.handle.f_handle[i]); |
67 | } |
68 | #else |
69 | static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
70 | { |
71 | } |
72 | #endif |
73 | |
74 | #ifdef CONFIG_INOTIFY_USER |
75 | |
76 | static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
77 | { |
78 | struct inotify_inode_mark *inode_mark; |
79 | struct inode *inode; |
80 | |
81 | if (mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE) |
82 | return; |
83 | |
84 | inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); |
85 | inode = igrab(fsnotify_conn_inode(conn: mark->connector)); |
86 | if (inode) { |
87 | seq_printf(m, fmt: "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:0 " , |
88 | inode_mark->wd, inode->i_ino, inode->i_sb->s_dev, |
89 | inotify_mark_user_mask(fsn_mark: mark)); |
90 | show_mark_fhandle(m, inode); |
91 | seq_putc(m, c: '\n'); |
92 | iput(inode); |
93 | } |
94 | } |
95 | |
96 | void inotify_show_fdinfo(struct seq_file *m, struct file *f) |
97 | { |
98 | show_fdinfo(m, f, show: inotify_fdinfo); |
99 | } |
100 | |
101 | #endif /* CONFIG_INOTIFY_USER */ |
102 | |
103 | #ifdef CONFIG_FANOTIFY |
104 | |
105 | static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
106 | { |
107 | unsigned int mflags = fanotify_mark_user_flags(mark); |
108 | struct inode *inode; |
109 | |
110 | if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) { |
111 | inode = igrab(fsnotify_conn_inode(conn: mark->connector)); |
112 | if (!inode) |
113 | return; |
114 | seq_printf(m, fmt: "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x " , |
115 | inode->i_ino, inode->i_sb->s_dev, |
116 | mflags, mark->mask, mark->ignore_mask); |
117 | show_mark_fhandle(m, inode); |
118 | seq_putc(m, c: '\n'); |
119 | iput(inode); |
120 | } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) { |
121 | struct mount *mnt = fsnotify_conn_mount(conn: mark->connector); |
122 | |
123 | seq_printf(m, fmt: "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n" , |
124 | mnt->mnt_id, mflags, mark->mask, mark->ignore_mask); |
125 | } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) { |
126 | struct super_block *sb = fsnotify_conn_sb(conn: mark->connector); |
127 | |
128 | seq_printf(m, fmt: "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n" , |
129 | sb->s_dev, mflags, mark->mask, mark->ignore_mask); |
130 | } |
131 | } |
132 | |
133 | void fanotify_show_fdinfo(struct seq_file *m, struct file *f) |
134 | { |
135 | struct fsnotify_group *group = f->private_data; |
136 | |
137 | seq_printf(m, fmt: "fanotify flags:%x event-flags:%x\n" , |
138 | group->fanotify_data.flags & FANOTIFY_INIT_FLAGS, |
139 | group->fanotify_data.f_flags); |
140 | |
141 | show_fdinfo(m, f, show: fanotify_fdinfo); |
142 | } |
143 | |
144 | #endif /* CONFIG_FANOTIFY */ |
145 | |
146 | #endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */ |
147 | |
148 | #endif /* CONFIG_PROC_FS */ |
149 | |