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"
20 #if defined(CONFIG_PROC_FS)
22 #if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
24 static void show_fdinfo(struct seq_file *m, struct file *f,
25 void (*show)(struct seq_file *m,
26 struct fsnotify_mark *mark))
28 struct fsnotify_group *group = f->private_data;
29 struct fsnotify_mark *mark;
31 mutex_lock(&group->mark_mutex);
32 list_for_each_entry(mark, &group->marks_list, g_list) {
34 if (seq_has_overflowed(m))
37 mutex_unlock(&group->mark_mutex);
40 #if defined(CONFIG_EXPORTFS)
41 static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
44 struct file_handle handle;
45 u8 pad[MAX_HANDLE_SZ];
49 f.handle.handle_bytes = sizeof(f.pad);
50 size = f.handle.handle_bytes >> 2;
52 ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, NULL);
53 if ((ret == FILEID_INVALID) || (ret < 0)) {
54 WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
58 f.handle.handle_type = ret;
59 f.handle.handle_bytes = size * sizeof(u32);
61 seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
62 f.handle.handle_bytes, f.handle.handle_type);
64 for (i = 0; i < f.handle.handle_bytes; i++)
65 seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
68 static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
73 #ifdef CONFIG_INOTIFY_USER
75 static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
77 struct inotify_inode_mark *inode_mark;
80 if (mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE)
83 inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
84 inode = igrab(fsnotify_conn_inode(mark->connector));
86 seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:0 ",
87 inode_mark->wd, inode->i_ino, inode->i_sb->s_dev,
88 inotify_mark_user_mask(mark));
89 show_mark_fhandle(m, inode);
95 void inotify_show_fdinfo(struct seq_file *m, struct file *f)
97 show_fdinfo(m, f, inotify_fdinfo);
100 #endif /* CONFIG_INOTIFY_USER */
102 #ifdef CONFIG_FANOTIFY
104 static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
106 unsigned int mflags = 0;
109 if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
110 mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
112 if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) {
113 inode = igrab(fsnotify_conn_inode(mark->connector));
116 seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ",
117 inode->i_ino, inode->i_sb->s_dev,
118 mflags, mark->mask, mark->ignored_mask);
119 show_mark_fhandle(m, inode);
122 } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) {
123 struct mount *mnt = fsnotify_conn_mount(mark->connector);
125 seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n",
126 mnt->mnt_id, mflags, mark->mask, mark->ignored_mask);
127 } else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) {
128 struct super_block *sb = fsnotify_conn_sb(mark->connector);
130 seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n",
131 sb->s_dev, mflags, mark->mask, mark->ignored_mask);
135 void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
137 struct fsnotify_group *group = f->private_data;
139 seq_printf(m, "fanotify flags:%x event-flags:%x\n",
140 group->fanotify_data.flags, group->fanotify_data.f_flags);
142 show_fdinfo(m, f, fanotify_fdinfo);
145 #endif /* CONFIG_FANOTIFY */
147 #endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */
149 #endif /* CONFIG_PROC_FS */