Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293// SPDX-License-Identifier: GPL-2.0/* * Procfs support for lockd * * Copyright (c) 2014 Jeff Layton <jlayton@primarydata.com> */
#include <linux/fs.h>#include <linux/proc_fs.h>#include <linux/module.h>#include <linux/nsproxy.h>#include <net/net_namespace.h>
#include "netns.h"#include "procfs.h"
/* * We only allow strings that start with 'Y', 'y', or '1'. */static ssize_tnlm_end_grace_write(struct file *file, const char __user *buf, size_t size, loff_t *pos){ char *data; struct lockd_net *ln = net_generic(current->nsproxy->net_ns, lockd_net_id);
if (size < 1) return -EINVAL;
data = simple_transaction_get(file, buf, size); if (IS_ERR(data)) return PTR_ERR(data);
switch(data[0]) { case 'Y': case 'y': case '1': locks_end_grace(&ln->lockd_manager); break; default: return -EINVAL; }
return size;}
static ssize_tnlm_end_grace_read(struct file *file, char __user *buf, size_t size, loff_t *pos){ struct lockd_net *ln = net_generic(current->nsproxy->net_ns, lockd_net_id); char resp[3];
resp[0] = list_empty(&ln->lockd_manager.list) ? 'Y' : 'N'; resp[1] = '\n'; resp[2] = '\0';
return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp));}
static const struct proc_ops lockd_end_grace_proc_ops = { .proc_write = nlm_end_grace_write, .proc_read = nlm_end_grace_read, .proc_lseek = default_llseek, .proc_release = simple_transaction_release,};
int __initlockd_create_procfs(void){ struct proc_dir_entry *entry;
entry = proc_mkdir("fs/lockd", NULL); if (!entry) return -ENOMEM; entry = proc_create("nlm_end_grace", S_IRUGO|S_IWUSR, entry, &lockd_end_grace_proc_ops); if (!entry) { remove_proc_entry("fs/lockd", NULL); return -ENOMEM; } return 0;}
void __exitlockd_remove_procfs(void){ remove_proc_entry("fs/lockd/nlm_end_grace", NULL); remove_proc_entry("fs/lockd", NULL);}