sysctl.c (7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) sysctl.c (f1aa2eb5ea05ccd1fd92d235346e60e90a1ed949)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sysctl.c: General linux system control interface
4 *
5 * Begun 24 March 1995, Stephen Tweedie
6 * Added /proc support, Dec 1995
7 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
8 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.

--- 411 unchanged lines hidden (view full) ---

420 **buffer = c;
421
422 (*size)--;
423 (*buffer)++;
424 *buf = *buffer;
425 }
426}
427
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sysctl.c: General linux system control interface
4 *
5 * Begun 24 March 1995, Stephen Tweedie
6 * Added /proc support, Dec 1995
7 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
8 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.

--- 411 unchanged lines hidden (view full) ---

420 **buffer = c;
421
422 (*size)--;
423 (*buffer)++;
424 *buf = *buffer;
425 }
426}
427
428static int do_proc_dobool_conv(bool *negp, unsigned long *lvalp,
429 int *valp,
430 int write, void *data)
431{
432 if (write) {
433 *(bool *)valp = *lvalp;
434 } else {
435 int val = *(bool *)valp;
436
437 *lvalp = (unsigned long)val;
438 *negp = false;
439 }
440 return 0;
441}
442
443static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
444 int *valp,
445 int write, void *data)
446{
447 if (write) {
448 if (*negp) {
449 if (*lvalp > (unsigned long) INT_MAX + 1)
450 return -EINVAL;

--- 254 unchanged lines hidden (view full) ---

705/**
706 * proc_dobool - read/write a bool
707 * @table: the sysctl table
708 * @write: %TRUE if this is a write to the sysctl file
709 * @buffer: the user buffer
710 * @lenp: the size of the user buffer
711 * @ppos: file position
712 *
428static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
429 int *valp,
430 int write, void *data)
431{
432 if (write) {
433 if (*negp) {
434 if (*lvalp > (unsigned long) INT_MAX + 1)
435 return -EINVAL;

--- 254 unchanged lines hidden (view full) ---

690/**
691 * proc_dobool - read/write a bool
692 * @table: the sysctl table
693 * @write: %TRUE if this is a write to the sysctl file
694 * @buffer: the user buffer
695 * @lenp: the size of the user buffer
696 * @ppos: file position
697 *
713 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
714 * values from/to the user buffer, treated as an ASCII string.
698 * Reads/writes one integer value from/to the user buffer,
699 * treated as an ASCII string.
715 *
700 *
701 * table->data must point to a bool variable and table->maxlen must
702 * be sizeof(bool).
703 *
716 * Returns 0 on success.
717 */
718int proc_dobool(struct ctl_table *table, int write, void *buffer,
719 size_t *lenp, loff_t *ppos)
720{
704 * Returns 0 on success.
705 */
706int proc_dobool(struct ctl_table *table, int write, void *buffer,
707 size_t *lenp, loff_t *ppos)
708{
721 return do_proc_dointvec(table, write, buffer, lenp, ppos,
722 do_proc_dobool_conv, NULL);
709 struct ctl_table tmp;
710 bool *data = table->data;
711 int res, val;
712
713 /* Do not support arrays yet. */
714 if (table->maxlen != sizeof(bool))
715 return -EINVAL;
716
717 tmp = *table;
718 tmp.maxlen = sizeof(val);
719 tmp.data = &val;
720
721 val = READ_ONCE(*data);
722 res = proc_dointvec(&tmp, write, buffer, lenp, ppos);
723 if (res)
724 return res;
725 if (write)
726 WRITE_ONCE(*data, val);
727 return 0;
723}
724
725/**
726 * proc_dointvec - read a vector of integers
727 * @table: the sysctl table
728 * @write: %TRUE if this is a write to the sysctl file
729 * @buffer: the user buffer
730 * @lenp: the size of the user buffer

--- 1768 unchanged lines hidden --- 		728}
729
730/**
731 * proc_dointvec - read a vector of integers
732 * @table: the sysctl table
733 * @write: %TRUE if this is a write to the sysctl file
734 * @buffer: the user buffer
735 * @lenp: the size of the user buffer

--- 1768 unchanged lines hidden ---