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156 lines
4.2 KiB
156 lines
4.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/file.h> |
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#include <linux/fs.h> |
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#include <linux/fsnotify_backend.h> |
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#include <linux/idr.h> |
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#include <linux/init.h> |
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#include <linux/inotify.h> |
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#include <linux/fanotify.h> |
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#include <linux/kernel.h> |
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#include <linux/namei.h> |
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#include <linux/sched.h> |
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#include <linux/types.h> |
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#include <linux/seq_file.h> |
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#include <linux/exportfs.h> |
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#include "inotify/inotify.h" |
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#include "fdinfo.h" |
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#include "fsnotify.h" |
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#if defined(CONFIG_PROC_FS) |
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#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY) |
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static void show_fdinfo(struct seq_file *m, struct file *f, |
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void (*show)(struct seq_file *m, |
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struct fsnotify_mark *mark)) |
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{ |
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struct fsnotify_group *group = f->private_data; |
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struct fsnotify_mark *mark; |
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mutex_lock(&group->mark_mutex); |
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list_for_each_entry(mark, &group->marks_list, g_list) { |
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show(m, mark); |
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if (seq_has_overflowed(m)) |
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break; |
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} |
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mutex_unlock(&group->mark_mutex); |
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} |
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#if defined(CONFIG_EXPORTFS) |
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static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
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{ |
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struct { |
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struct file_handle handle; |
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u8 pad[MAX_HANDLE_SZ]; |
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} f; |
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int size, ret, i; |
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f.handle.handle_bytes = sizeof(f.pad); |
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size = f.handle.handle_bytes >> 2; |
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ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, NULL); |
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if ((ret == FILEID_INVALID) || (ret < 0)) { |
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WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret); |
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return; |
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} |
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f.handle.handle_type = ret; |
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f.handle.handle_bytes = size * sizeof(u32); |
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seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:", |
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f.handle.handle_bytes, f.handle.handle_type); |
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for (i = 0; i < f.handle.handle_bytes; i++) |
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seq_printf(m, "%02x", (int)f.handle.f_handle[i]); |
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} |
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#else |
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static void show_mark_fhandle(struct seq_file *m, struct inode *inode) |
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{ |
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} |
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#endif |
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#ifdef CONFIG_INOTIFY_USER |
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static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
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{ |
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struct inotify_inode_mark *inode_mark; |
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struct inode *inode; |
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if (mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE) |
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return; |
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inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark); |
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inode = igrab(fsnotify_conn_inode(mark->connector)); |
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if (inode) { |
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/* |
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* IN_ALL_EVENTS represents all of the mask bits |
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* that we expose to userspace. There is at |
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* least one bit (FS_EVENT_ON_CHILD) which is |
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* used only internally to the kernel. |
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*/ |
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u32 mask = mark->mask & IN_ALL_EVENTS; |
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seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:%x ", |
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inode_mark->wd, inode->i_ino, inode->i_sb->s_dev, |
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mask, mark->ignored_mask); |
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show_mark_fhandle(m, inode); |
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seq_putc(m, '\n'); |
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iput(inode); |
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} |
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} |
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void inotify_show_fdinfo(struct seq_file *m, struct file *f) |
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{ |
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show_fdinfo(m, f, inotify_fdinfo); |
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} |
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#endif /* CONFIG_INOTIFY_USER */ |
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#ifdef CONFIG_FANOTIFY |
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static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark) |
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{ |
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unsigned int mflags = 0; |
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struct inode *inode; |
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if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY) |
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mflags |= FAN_MARK_IGNORED_SURV_MODIFY; |
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if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) { |
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inode = igrab(fsnotify_conn_inode(mark->connector)); |
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if (!inode) |
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return; |
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seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ", |
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inode->i_ino, inode->i_sb->s_dev, |
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mflags, mark->mask, mark->ignored_mask); |
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show_mark_fhandle(m, inode); |
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seq_putc(m, '\n'); |
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iput(inode); |
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} else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) { |
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struct mount *mnt = fsnotify_conn_mount(mark->connector); |
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seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n", |
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mnt->mnt_id, mflags, mark->mask, mark->ignored_mask); |
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} else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) { |
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struct super_block *sb = fsnotify_conn_sb(mark->connector); |
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seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n", |
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sb->s_dev, mflags, mark->mask, mark->ignored_mask); |
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} |
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} |
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void fanotify_show_fdinfo(struct seq_file *m, struct file *f) |
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{ |
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struct fsnotify_group *group = f->private_data; |
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seq_printf(m, "fanotify flags:%x event-flags:%x\n", |
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group->fanotify_data.flags, group->fanotify_data.f_flags); |
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show_fdinfo(m, f, fanotify_fdinfo); |
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} |
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#endif /* CONFIG_FANOTIFY */ |
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#endif /* CONFIG_INOTIFY_USER || CONFIG_FANOTIFY */ |
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#endif /* CONFIG_PROC_FS */
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