1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/file.h>
4 #include <linux/fsnotify_backend.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>
16 #include "inotify/inotify.h"
17 #include "fanotify/fanotify.h"
21 #if defined(CONFIG_PROC_FS)
23 #if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
25 static void show_fdinfo(struct seq_file *m, struct file *f,
26 void (*show)(struct seq_file *m,
27 struct fsnotify_mark *mark))
29 struct fsnotify_group *group = f->private_data;
30 struct fsnotify_mark *mark;
32 fsnotify_group_lock(group);
33 list_for_each_entry(mark, &group->marks_list, g_list) {
35 if (seq_has_overflowed(m))
38 fsnotify_group_unlock(group);
41 #if defined(CONFIG_EXPORTFS)
42 static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
45 struct file_handle handle;
46 u8 pad[MAX_HANDLE_SZ];
50 f.handle.handle_bytes = sizeof(f.pad);
51 size = f.handle.handle_bytes >> 2;
53 ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, NULL);
54 if ((ret == FILEID_INVALID) || (ret < 0)) {
55 WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
59 f.handle.handle_type = ret;
60 f.handle.handle_bytes = size * sizeof(u32);
62 seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
63 f.handle.handle_bytes, f.handle.handle_type);
65 for (i = 0; i < f.handle.handle_bytes; i++)
66 seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
69 static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
74 #ifdef CONFIG_INOTIFY_USER
76 static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
78 struct inotify_inode_mark *inode_mark;
81 if (mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE)
84 inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
85 inode = igrab(fsnotify_conn_inode(mark->connector));
87 seq_printf(m, "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(mark));
90 show_mark_fhandle(m, inode);
96 void inotify_show_fdinfo(struct seq_file *m, struct file *f)
98 show_fdinfo(m, f, inotify_fdinfo);
101 #endif /* CONFIG_INOTIFY_USER */
103 #ifdef CONFIG_FANOTIFY
105 static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
107 unsigned int mflags = fanotify_mark_user_flags(mark);
110 if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) {
111 inode = igrab(fsnotify_conn_inode(mark->connector));
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,
116 mflags, mark->mask, mark->ignored_mask);
117 show_mark_fhandle(m, inode);
120 } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) {
121 struct mount *mnt = fsnotify_conn_mount(mark->connector);
123 seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n",
124 mnt->mnt_id, mflags, mark->mask, mark->ignored_mask);
125 } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) {
126 struct super_block *sb = fsnotify_conn_sb(mark->connector);
128 seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n",
129 sb->s_dev, mflags, mark->mask, mark->ignored_mask);
133 void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
135 struct fsnotify_group *group = f->private_data;
137 seq_printf(m, "fanotify flags:%x event-flags:%x\n",
138 group->fanotify_data.flags & FANOTIFY_INIT_FLAGS,
139 group->fanotify_data.f_flags);
141 show_fdinfo(m, f, fanotify_fdinfo);
144 #endif /* CONFIG_FANOTIFY */
146 #endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */
148 #endif /* CONFIG_PROC_FS */