90  * enum sysctl_writes_mode - supported sysctl write modes
92  * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value
100  *	sent to the write syscall. If dealing with strings respect the file
105  * These write modes control how current file position affects the behavior of
106  * updating sysctl values through the proc interface on each write.
124 static int _proc_do_string(char *data, int maxlen, int write,  in _proc_do_string()  argument
135 	if (write) {  in _proc_do_string()
223  * @write: %TRUE if this is a write to the sysctl file
237 int proc_dostring(const struct ctl_table *table, int write,  in proc_dostring()  argument
240 	if (write)  in proc_dostring()
243 	return _proc_do_string(table->data, table->maxlen, write, buffer, lenp,  in proc_dostring()
407 				 int write, void *data)  in do_proc_dointvec_conv()  argument
409 	if (write) {  in do_proc_dointvec_conv()
434 				  int write, void *data)  in do_proc_douintvec_conv()  argument
436 	if (write) {  in do_proc_douintvec_conv()
450 		  int write, void *buffer,  in __do_proc_dointvec()  argument
453 			      int write, void *data),  in __do_proc_dointvec()
460 	if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_dointvec()
472 	if (write) {  in __do_proc_dointvec()
485 		if (write) {  in __do_proc_dointvec()
510 	if (!write && !first && left && !err)  in __do_proc_dointvec()
512 	if (write && !err && left)  in __do_proc_dointvec()
514 	if (write && first)  in __do_proc_dointvec()
522 static int do_proc_dointvec(const struct ctl_table *table, int write,  in do_proc_dointvec()  argument
525 			      int write, void *data),  in do_proc_dointvec()
528 	return __do_proc_dointvec(table->data, table, write,  in do_proc_dointvec()
538 					   int write, void *data),  in do_proc_douintvec_w()  argument
593 					   int write, void *data),  in do_proc_douintvec_r()  argument
621 			       int write, void *buffer,  in __do_proc_douintvec()  argument
625 					   int write, void *data),  in __do_proc_douintvec()
630 	if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_douintvec()
650 	if (write)  in __do_proc_douintvec()
656 int do_proc_douintvec(const struct ctl_table *table, int write,  in do_proc_douintvec()  argument
660 				  int write, void *data),  in do_proc_douintvec()
663 	return __do_proc_douintvec(table->data, table, write,  in do_proc_douintvec()
668  * proc_dobool - read/write a bool
670  * @write: %TRUE if this is a write to the sysctl file
683 int proc_dobool(const struct ctl_table *table, int write, void *buffer,  in proc_dobool()  argument
699 	res = proc_dointvec(&tmp, write, buffer, lenp, ppos);  in proc_dobool()
702 	if (write)  in proc_dobool()
710  * @write: %TRUE if this is a write to the sysctl file
720 int proc_dointvec(const struct ctl_table *table, int write, void *buffer,  in proc_dointvec()  argument
723 	return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);  in proc_dointvec()
729  * @write: %TRUE if this is a write to the sysctl file
739 int proc_douintvec(const struct ctl_table *table, int write, void *buffer,  in proc_douintvec()  argument
742 	return do_proc_douintvec(table, write, buffer, lenp, ppos,  in proc_douintvec()
750 static int proc_taint(const struct ctl_table *table, int write,  in proc_taint()  argument
757 	if (write && !capable(CAP_SYS_ADMIN))  in proc_taint()
762 	err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);  in proc_taint()
766 	if (write) {  in proc_taint()
805 					int write, void *data)  in do_proc_dointvec_minmax_conv()  argument
813 	int *ip = write ? &tmp : valp;  in do_proc_dointvec_minmax_conv()
815 	ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data);  in do_proc_dointvec_minmax_conv()
819 	if (write) {  in do_proc_dointvec_minmax_conv()
832  * @write: %TRUE if this is a write to the sysctl file
843  * Returns 0 on success or -EINVAL on write when the range check fails.
845 int proc_dointvec_minmax(const struct ctl_table *table, int write,  in proc_dointvec_minmax()  argument
852 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_minmax()
872 					 int write, void *data)  in do_proc_douintvec_minmax_conv()  argument
877 	/* write via temporary local uint for bounds-checking */  in do_proc_douintvec_minmax_conv()
878 	unsigned int *up = write ? &tmp : valp;  in do_proc_douintvec_minmax_conv()
880 	ret = do_proc_douintvec_conv(lvalp, up, write, data);  in do_proc_douintvec_minmax_conv()
884 	if (write) {  in do_proc_douintvec_minmax_conv()
898  * @write: %TRUE if this is a write to the sysctl file
912  * Returns 0 on success or -ERANGE on write when the range check fails.
914 int proc_douintvec_minmax(const struct ctl_table *table, int write,  in proc_douintvec_minmax()  argument
921 	return do_proc_douintvec(table, write, buffer, lenp, ppos,  in proc_douintvec_minmax()
928  * @write: %TRUE if this is a write to the sysctl file
940  * Returns 0 on success or an error on write when the range check fails.
942 int proc_dou8vec_minmax(const struct ctl_table *table, int write,  in proc_dou8vec_minmax()  argument
968 	res = do_proc_douintvec(&tmp, write, buffer, lenp, ppos,  in proc_dou8vec_minmax()
972 	if (write)  in proc_dou8vec_minmax()
979 static int sysrq_sysctl_handler(const struct ctl_table *table, int write,  in sysrq_sysctl_handler()  argument
986 	ret = __do_proc_dointvec(&tmp, table, write, buffer,  in sysrq_sysctl_handler()
988 	if (ret || !write)  in sysrq_sysctl_handler()
991 	if (write)  in sysrq_sysctl_handler()
999 		const struct ctl_table *table, int write,  in __do_proc_doulongvec_minmax()  argument
1008 	if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_doulongvec_minmax()
1019 	if (write) {  in __do_proc_doulongvec_minmax()
1031 		if (write) {  in __do_proc_doulongvec_minmax()
1060 	if (!write && !first && left && !err)  in __do_proc_doulongvec_minmax()
1062 	if (write && !err)  in __do_proc_doulongvec_minmax()
1064 	if (write && first)  in __do_proc_doulongvec_minmax()
1072 static int do_proc_doulongvec_minmax(const struct ctl_table *table, int write,  in do_proc_doulongvec_minmax()  argument
1076 	return __do_proc_doulongvec_minmax(table->data, table, write,  in do_proc_doulongvec_minmax()
1083  * @write: %TRUE if this is a write to the sysctl file
1096 int proc_doulongvec_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_minmax()  argument
1099     return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);  in proc_doulongvec_minmax()
1105  * @write: %TRUE if this is a write to the sysctl file
1119 int proc_doulongvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_ms_jiffies_minmax()  argument
1122     return do_proc_doulongvec_minmax(table, write, buffer,  in proc_doulongvec_ms_jiffies_minmax()
1129 					 int write, void *data)  in do_proc_dointvec_jiffies_conv()  argument
1131 	if (write) {  in do_proc_dointvec_jiffies_conv()
1155 						int write, void *data)  in do_proc_dointvec_userhz_jiffies_conv()  argument
1157 	if (write) {  in do_proc_dointvec_userhz_jiffies_conv()
1178 					    int write, void *data)  in do_proc_dointvec_ms_jiffies_conv()  argument
1180 	if (write) {  in do_proc_dointvec_ms_jiffies_conv()
1202 						int *valp, int write, void *data)  in do_proc_dointvec_ms_jiffies_minmax_conv()  argument
1210 	int *ip = write ? &tmp : valp;  in do_proc_dointvec_ms_jiffies_minmax_conv()
1212 	ret = do_proc_dointvec_ms_jiffies_conv(negp, lvalp, ip, write, data);  in do_proc_dointvec_ms_jiffies_minmax_conv()
1216 	if (write) {  in do_proc_dointvec_ms_jiffies_minmax_conv()
1228  * @write: %TRUE if this is a write to the sysctl file
1240 int proc_dointvec_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_jiffies()  argument
1243     return do_proc_dointvec(table,write,buffer,lenp,ppos,  in proc_dointvec_jiffies()
1247 int proc_dointvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies_minmax()  argument
1254 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_ms_jiffies_minmax()
1261  * @write: %TRUE if this is a write to the sysctl file
1273 int proc_dointvec_userhz_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_userhz_jiffies()  argument
1276 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_userhz_jiffies()
1283  * @write: %TRUE if this is a write to the sysctl file
1295 int proc_dointvec_ms_jiffies(const struct ctl_table *table, int write, void *buffer,  in proc_dointvec_ms_jiffies()  argument
1298 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_ms_jiffies()
1302 static int proc_do_cad_pid(const struct ctl_table *table, int write, void *buffer,  in proc_do_cad_pid()  argument
1311 	r = __do_proc_dointvec(&tmp, table, write, buffer,  in proc_do_cad_pid()
1313 	if (r || !write)  in proc_do_cad_pid()
1325  * proc_do_large_bitmap - read/write from/to a large bitmap
1327  * @write: %TRUE if this is a write to the sysctl file
1341 int proc_do_large_bitmap(const struct ctl_table *table, int write,  in proc_do_large_bitmap()  argument
1351 	if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {  in proc_do_large_bitmap()
1356 	if (write) {  in proc_do_large_bitmap()
1457 		if (write) {  in proc_do_large_bitmap()
1473 int proc_dostring(const struct ctl_table *table, int write,  in proc_dostring()  argument
1479 int proc_dobool(const struct ctl_table *table, int write,  in proc_dobool()  argument
1485 int proc_dointvec(const struct ctl_table *table, int write,  in proc_dointvec()  argument
1491 int proc_douintvec(const struct ctl_table *table, int write,  in proc_douintvec()  argument
1497 int proc_dointvec_minmax(const struct ctl_table *table, int write,  in proc_dointvec_minmax()  argument
1503 int proc_douintvec_minmax(const struct ctl_table *table, int write,  in proc_douintvec_minmax()  argument
1509 int proc_dou8vec_minmax(const struct ctl_table *table, int write,  in proc_dou8vec_minmax()  argument
1515 int proc_dointvec_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_jiffies()  argument
1521 int proc_dointvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies_minmax()  argument
1527 int proc_dointvec_userhz_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_userhz_jiffies()  argument
1533 int proc_dointvec_ms_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies()  argument
1539 int proc_doulongvec_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_minmax()  argument
1545 int proc_doulongvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_ms_jiffies_minmax()  argument
1551 int proc_do_large_bitmap(const struct ctl_table *table, int write,  in proc_do_large_bitmap()  argument
1560 int proc_do_static_key(const struct ctl_table *table, int write,  in proc_do_static_key()  argument
1574 	if (write && !capable(CAP_SYS_ADMIN))  in proc_do_static_key()
1579 	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);  in proc_do_static_key()
1580 	if (write && !ret) {  in proc_do_static_key()