diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /ipc/mq_sysctl.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'ipc/mq_sysctl.c')
-rw-r--r-- | ipc/mq_sysctl.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/ipc/mq_sysctl.c b/ipc/mq_sysctl.c new file mode 100644 index 000000000..72a92a08c --- /dev/null +++ b/ipc/mq_sysctl.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2007 IBM Corporation + * + * Author: Cedric Le Goater <clg@fr.ibm.com> + */ + +#include <linux/nsproxy.h> +#include <linux/ipc_namespace.h> +#include <linux/sysctl.h> + +#ifdef CONFIG_PROC_SYSCTL +static void *get_mq(struct ctl_table *table) +{ + char *which = table->data; + struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns; + which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns; + return which; +} + +static int proc_mq_dointvec(struct ctl_table *table, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table mq_table; + memcpy(&mq_table, table, sizeof(mq_table)); + mq_table.data = get_mq(table); + + return proc_dointvec(&mq_table, write, buffer, lenp, ppos); +} + +static int proc_mq_dointvec_minmax(struct ctl_table *table, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct ctl_table mq_table; + memcpy(&mq_table, table, sizeof(mq_table)); + mq_table.data = get_mq(table); + + return proc_dointvec_minmax(&mq_table, write, buffer, + lenp, ppos); +} +#else +#define proc_mq_dointvec NULL +#define proc_mq_dointvec_minmax NULL +#endif + +static int msg_max_limit_min = MIN_MSGMAX; +static int msg_max_limit_max = HARD_MSGMAX; + +static int msg_maxsize_limit_min = MIN_MSGSIZEMAX; +static int msg_maxsize_limit_max = HARD_MSGSIZEMAX; + +static struct ctl_table mq_sysctls[] = { + { + .procname = "queues_max", + .data = &init_ipc_ns.mq_queues_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_mq_dointvec, + }, + { + .procname = "msg_max", + .data = &init_ipc_ns.mq_msg_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_mq_dointvec_minmax, + .extra1 = &msg_max_limit_min, + .extra2 = &msg_max_limit_max, + }, + { + .procname = "msgsize_max", + .data = &init_ipc_ns.mq_msgsize_max, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_mq_dointvec_minmax, + .extra1 = &msg_maxsize_limit_min, + .extra2 = &msg_maxsize_limit_max, + }, + { + .procname = "msg_default", + .data = &init_ipc_ns.mq_msg_default, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_mq_dointvec_minmax, + .extra1 = &msg_max_limit_min, + .extra2 = &msg_max_limit_max, + }, + { + .procname = "msgsize_default", + .data = &init_ipc_ns.mq_msgsize_default, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_mq_dointvec_minmax, + .extra1 = &msg_maxsize_limit_min, + .extra2 = &msg_maxsize_limit_max, + }, + {} +}; + +static struct ctl_table mq_sysctl_dir[] = { + { + .procname = "mqueue", + .mode = 0555, + .child = mq_sysctls, + }, + {} +}; + +static struct ctl_table mq_sysctl_root[] = { + { + .procname = "fs", + .mode = 0555, + .child = mq_sysctl_dir, + }, + {} +}; + +struct ctl_table_header *mq_register_sysctl_table(void) +{ + return register_sysctl_table(mq_sysctl_root); +} |