linux/fs/autofs/waitq.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
 * Copyright 2001-2006 Ian Kent <[email protected]>
 */

#include <linux/sched/signal.h>
#include "autofs_i.h"

/* We make this a static variable rather than a part of the superblock; it
 * is better if we don't reassign numbers easily even across filesystems
 */
static autofs_wqt_t autofs_next_wait_queue = …;

void autofs_catatonic_mode(struct autofs_sb_info *sbi)
{ … }

static int autofs_write(struct autofs_sb_info *sbi,
			struct file *file, const void *addr, int bytes)
{ … }

static void autofs_notify_daemon(struct autofs_sb_info *sbi,
				 struct autofs_wait_queue *wq,
				 int type)
{ … }

static struct autofs_wait_queue *
autofs_find_wait(struct autofs_sb_info *sbi, const struct qstr *qstr)
{ … }

/*
 * Check if we have a valid request.
 * Returns
 * 1 if the request should continue.
 *   In this case we can return an autofs_wait_queue entry if one is
 *   found or NULL to idicate a new wait needs to be created.
 * 0 or a negative errno if the request shouldn't continue.
 */
static int validate_request(struct autofs_wait_queue **wait,
			    struct autofs_sb_info *sbi,
			    const struct qstr *qstr,
			    const struct path *path, enum autofs_notify notify)
{ … }

int autofs_wait(struct autofs_sb_info *sbi,
		 const struct path *path, enum autofs_notify notify)
{ … }


int autofs_wait_release(struct autofs_sb_info *sbi,
			autofs_wqt_t wait_queue_token, int status)
{ … }