Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
be77196b CG |
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> | |
be77196b CG |
14 | #include <linux/exportfs.h> |
15 | ||
16 | #include "inotify/inotify.h" | |
4adce25c | 17 | #include "fanotify/fanotify.h" |
d6f7aa98 | 18 | #include "fdinfo.h" |
36f10f55 | 19 | #include "fsnotify.h" |
be77196b CG |
20 | |
21 | #if defined(CONFIG_PROC_FS) | |
22 | ||
23 | #if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY) | |
24 | ||
a3816ab0 JP |
25 | static void show_fdinfo(struct seq_file *m, struct file *f, |
26 | void (*show)(struct seq_file *m, | |
27 | struct fsnotify_mark *mark)) | |
be77196b CG |
28 | { |
29 | struct fsnotify_group *group = f->private_data; | |
30 | struct fsnotify_mark *mark; | |
be77196b | 31 | |
43b245a7 | 32 | fsnotify_group_lock(group); |
be77196b | 33 | list_for_each_entry(mark, &group->marks_list, g_list) { |
a3816ab0 JP |
34 | show(m, mark); |
35 | if (seq_has_overflowed(m)) | |
be77196b CG |
36 | break; |
37 | } | |
43b245a7 | 38 | fsnotify_group_unlock(group); |
be77196b CG |
39 | } |
40 | ||
41 | #if defined(CONFIG_EXPORTFS) | |
a3816ab0 | 42 | static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
be77196b CG |
43 | { |
44 | struct { | |
45 | struct file_handle handle; | |
1fc98d11 | 46 | u8 pad[MAX_HANDLE_SZ]; |
be77196b CG |
47 | } f; |
48 | int size, ret, i; | |
49 | ||
50 | f.handle.handle_bytes = sizeof(f.pad); | |
51 | size = f.handle.handle_bytes >> 2; | |
52 | ||
ddd06c36 | 53 | ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, NULL); |
7e882481 | 54 | if ((ret == FILEID_INVALID) || (ret < 0)) { |
be77196b | 55 | WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret); |
a3816ab0 | 56 | return; |
be77196b CG |
57 | } |
58 | ||
59 | f.handle.handle_type = ret; | |
60 | f.handle.handle_bytes = size * sizeof(u32); | |
61 | ||
a3816ab0 JP |
62 | seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:", |
63 | f.handle.handle_bytes, f.handle.handle_type); | |
be77196b CG |
64 | |
65 | for (i = 0; i < f.handle.handle_bytes; i++) | |
a3816ab0 | 66 | seq_printf(m, "%02x", (int)f.handle.f_handle[i]); |
be77196b CG |
67 | } |
68 | #else | |
a3816ab0 | 69 | static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
be77196b | 70 | { |
be77196b CG |
71 | } |
72 | #endif | |
73 | ||
74 | #ifdef CONFIG_INOTIFY_USER | |
75 | ||
a3816ab0 | 76 | static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
be77196b CG |
77 | { |
78 | struct inotify_inode_mark *inode_mark; | |
79 | struct inode *inode; | |
be77196b | 80 | |
d6f7b98b | 81 | if (mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE) |
a3816ab0 | 82 | return; |
be77196b CG |
83 | |
84 | inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); | |
36f10f55 | 85 | inode = igrab(fsnotify_conn_inode(mark->connector)); |
be77196b | 86 | if (inode) { |
a32e697c | 87 | seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:0 ", |
a3816ab0 | 88 | inode_mark->wd, inode->i_ino, inode->i_sb->s_dev, |
a32e697c | 89 | inotify_mark_user_mask(mark)); |
a3816ab0 JP |
90 | show_mark_fhandle(m, inode); |
91 | seq_putc(m, '\n'); | |
be77196b CG |
92 | iput(inode); |
93 | } | |
be77196b CG |
94 | } |
95 | ||
a3816ab0 | 96 | void inotify_show_fdinfo(struct seq_file *m, struct file *f) |
be77196b | 97 | { |
a3816ab0 | 98 | show_fdinfo(m, f, inotify_fdinfo); |
be77196b CG |
99 | } |
100 | ||
101 | #endif /* CONFIG_INOTIFY_USER */ | |
102 | ||
103 | #ifdef CONFIG_FANOTIFY | |
104 | ||
a3816ab0 | 105 | static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
be77196b | 106 | { |
4adce25c | 107 | unsigned int mflags = fanotify_mark_user_flags(mark); |
be77196b | 108 | struct inode *inode; |
be77196b | 109 | |
d6f7b98b | 110 | if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) { |
36f10f55 | 111 | inode = igrab(fsnotify_conn_inode(mark->connector)); |
be77196b | 112 | if (!inode) |
a3816ab0 JP |
113 | return; |
114 | seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ", | |
115 | inode->i_ino, inode->i_sb->s_dev, | |
31a371e4 | 116 | mflags, mark->mask, mark->ignore_mask); |
a3816ab0 JP |
117 | show_mark_fhandle(m, inode); |
118 | seq_putc(m, '\n'); | |
be77196b | 119 | iput(inode); |
d6f7b98b | 120 | } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) { |
36f10f55 | 121 | struct mount *mnt = fsnotify_conn_mount(mark->connector); |
be77196b | 122 | |
a3816ab0 | 123 | seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n", |
31a371e4 | 124 | mnt->mnt_id, mflags, mark->mask, mark->ignore_mask); |
1e6cb723 AG |
125 | } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) { |
126 | struct super_block *sb = fsnotify_conn_sb(mark->connector); | |
127 | ||
128 | seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n", | |
31a371e4 | 129 | sb->s_dev, mflags, mark->mask, mark->ignore_mask); |
be77196b | 130 | } |
be77196b CG |
131 | } |
132 | ||
a3816ab0 | 133 | void fanotify_show_fdinfo(struct seq_file *m, struct file *f) |
be77196b CG |
134 | { |
135 | struct fsnotify_group *group = f->private_data; | |
de8cd83e | 136 | |
be77196b | 137 | seq_printf(m, "fanotify flags:%x event-flags:%x\n", |
a8b98c80 | 138 | group->fanotify_data.flags & FANOTIFY_INIT_FLAGS, |
7cea2a3c | 139 | group->fanotify_data.f_flags); |
be77196b | 140 | |
a3816ab0 | 141 | show_fdinfo(m, f, fanotify_fdinfo); |
be77196b CG |
142 | } |
143 | ||
144 | #endif /* CONFIG_FANOTIFY */ | |
145 | ||
146 | #endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */ | |
147 | ||
148 | #endif /* CONFIG_PROC_FS */ |