fs/proc/generic.c

46 static int proc_match(const char *name, struct proc_dir_entry *de, unsigned int len)
48 	if (len < de->namelen)
50 	if (len > de->namelen)
53 	return memcmp(name, de->name, len);
75 		struct proc_dir_entry *de = rb_entry(node,
78 		int result = proc_match(name, de, len);
85 			return de;
91 			      struct proc_dir_entry *de)
101 		int result = proc_match(de->name, this, de->namelen);
113 	rb_link_node(&de->subdir_node, parent, new);
114 	rb_insert_color(&de->subdir_node, root);
122 	struct proc_dir_entry *de = PDE(inode);
131 	proc_set_user(de, inode->i_uid, inode->i_gid);
132 	de->mode = inode->i_mode;
141 	struct proc_dir_entry *de = PDE(inode);
142 	if (de) {
143 		nlink_t nlink = READ_ONCE(de->nlink);
166 	struct proc_dir_entry	*de;
168 	de = *ret ?: &proc_root;
170 		de = pde_subdir_find(de, cp, next - cp);
171 		if (!de) {
178 	*ret = de;
244 			      struct proc_dir_entry *de)
249 	de = pde_subdir_find(de, dentry->d_name.name, dentry->d_name.len);
250 	if (de) {
251 		pde_get(de);
253 		inode = proc_get_inode(dir->i_sb, de);
256 		d_set_d_op(dentry, de->proc_dops);
284 		    struct proc_dir_entry *de)
293 	de = pde_subdir_first(de);
295 		if (!de) {
301 		de = pde_subdir_next(de);
307 		pde_get(de);
309 		if (!dir_emit(ctx, de->name, de->namelen,
310 			    de->low_ino, de->mode >> 12)) {
311 			pde_put(de);
316 		next = pde_subdir_next(de);
317 		pde_put(de);
318 		de = next;
319 	} while (de);
591 	struct proc_dir_entry *de = PDE(inode);
593 	if (de->state_size)
594 		return seq_open_private(file, de->seq_ops, de->state_size);
595 	return seq_open(file, de->seq_ops);
600 	struct proc_dir_entry *de = PDE(inode);
602 	if (de->state_size)
633 	struct proc_dir_entry *de = PDE(inode);
635 	return single_open(file, de->single_show, de->data);
661 void proc_set_size(struct proc_dir_entry *de, loff_t size)
663 	de->size = size;
667 void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid)
669 	de->uid = uid;
670 	de->gid = gid;
687 	struct proc_dir_entry *de = NULL;
698 	de = pde_subdir_find(parent, fn, len);
699 	if (de) {
700 		if (unlikely(pde_is_permanent(de))) {
701 			WARN(1, "removing permanent /proc entry '%s'", de->name);
702 			de = NULL;
704 			rb_erase(&de->subdir_node, &parent->subdir);
705 			if (S_ISDIR(de->mode))
710 	if (!de) {
715 	proc_entry_rundown(de);
717 	WARN(pde_subdir_first(de),
719 	     __func__, de->parent->name, de->name, pde_subdir_first(de)->name);
720 	pde_put(de);
726 	struct proc_dir_entry *root = NULL, *de, *next;
750 	de = root;
752 		next = pde_subdir_first(de);
760 			rb_erase(&next->subdir_node, &de->subdir);
761 			de = next;
764 		next = de->parent;
765 		if (S_ISDIR(de->mode))
769 		proc_entry_rundown(de);
770 		if (de == root)
772 		pde_put(de);
775 		de = next;
784 	struct proc_dir_entry *de = PDE(inode);
785 	return de->parent->data;
789 void proc_remove(struct proc_dir_entry *de)
791 	if (de)
792 		remove_proc_subtree(de->name, de->parent);