42  * enum sysctl_writes_mode - supported sysctl write modes
44  * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value
52  *	sent to the write syscall. If dealing with strings respect the file
57  * These write modes control how current file position affects the behavior of
58  * updating sysctl values through the proc interface on each write.
76 static int _proc_do_string(char *data, int maxlen, int write,  in _proc_do_string()  argument
87 	if (write) {  in _proc_do_string()
175  * @write: %TRUE if this is a write to the sysctl file
189 int proc_dostring(const struct ctl_table *table, int write,  in proc_dostring()  argument
192 	if (write)  in proc_dostring()
195 	return _proc_do_string(table->data, table->maxlen, write, buffer, lenp,  in proc_dostring()
359 				 int write, void *data)  in do_proc_dointvec_conv()  argument
361 	if (write) {  in do_proc_dointvec_conv()
386 				  int write, void *data)  in do_proc_douintvec_conv()  argument
388 	if (write) {  in do_proc_douintvec_conv()
402 		  int write, void *buffer,  in __do_proc_dointvec()  argument
405 			      int write, void *data),  in __do_proc_dointvec()
412 	if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_dointvec()
424 	if (write) {  in __do_proc_dointvec()
437 		if (write) {  in __do_proc_dointvec()
462 	if (!write && !first && left && !err)  in __do_proc_dointvec()
464 	if (write && !err && left)  in __do_proc_dointvec()
466 	if (write && first)  in __do_proc_dointvec()
474 static int do_proc_dointvec(const struct ctl_table *table, int write,  in do_proc_dointvec()  argument
477 			      int write, void *data),  in do_proc_dointvec()
480 	return __do_proc_dointvec(table->data, table, write,  in do_proc_dointvec()
490 					   int write, void *data),  in do_proc_douintvec_w()  argument
545 					   int write, void *data),  in do_proc_douintvec_r()  argument
573 			       int write, void *buffer,  in __do_proc_douintvec()  argument
577 					   int write, void *data),  in __do_proc_douintvec()
582 	if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_douintvec()
602 	if (write)  in __do_proc_douintvec()
608 int do_proc_douintvec(const struct ctl_table *table, int write,  in do_proc_douintvec()  argument
612 				  int write, void *data),  in do_proc_douintvec()
615 	return __do_proc_douintvec(table->data, table, write,  in do_proc_douintvec()
620  * proc_dobool - read/write a bool
622  * @write: %TRUE if this is a write to the sysctl file
635 int proc_dobool(const struct ctl_table *table, int write, void *buffer,  in proc_dobool()  argument
651 	res = proc_dointvec(&tmp, write, buffer, lenp, ppos);  in proc_dobool()
654 	if (write)  in proc_dobool()
662  * @write: %TRUE if this is a write to the sysctl file
672 int proc_dointvec(const struct ctl_table *table, int write, void *buffer,  in proc_dointvec()  argument
675 	return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);  in proc_dointvec()
681  * @write: %TRUE if this is a write to the sysctl file
691 int proc_douintvec(const struct ctl_table *table, int write, void *buffer,  in proc_douintvec()  argument
694 	return do_proc_douintvec(table, write, buffer, lenp, ppos,  in proc_douintvec()
714 					int write, void *data)  in do_proc_dointvec_minmax_conv()  argument
722 	int *ip = write ? &tmp : valp;  in do_proc_dointvec_minmax_conv()
724 	ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data);  in do_proc_dointvec_minmax_conv()
728 	if (write) {  in do_proc_dointvec_minmax_conv()
741  * @write: %TRUE if this is a write to the sysctl file
752  * Returns 0 on success or -EINVAL on write when the range check fails.
754 int proc_dointvec_minmax(const struct ctl_table *table, int write,  in proc_dointvec_minmax()  argument
761 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_minmax()
781 					 int write, void *data)  in do_proc_douintvec_minmax_conv()  argument
786 	/* write via temporary local uint for bounds-checking */  in do_proc_douintvec_minmax_conv()
787 	unsigned int *up = write ? &tmp : valp;  in do_proc_douintvec_minmax_conv()
789 	ret = do_proc_douintvec_conv(lvalp, up, write, data);  in do_proc_douintvec_minmax_conv()
793 	if (write) {  in do_proc_douintvec_minmax_conv()
807  * @write: %TRUE if this is a write to the sysctl file
821  * Returns 0 on success or -ERANGE on write when the range check fails.
823 int proc_douintvec_minmax(const struct ctl_table *table, int write,  in proc_douintvec_minmax()  argument
830 	return do_proc_douintvec(table, write, buffer, lenp, ppos,  in proc_douintvec_minmax()
837  * @write: %TRUE if this is a write to the sysctl file
849  * Returns 0 on success or an error on write when the range check fails.
851 int proc_dou8vec_minmax(const struct ctl_table *table, int write,  in proc_dou8vec_minmax()  argument
877 	res = do_proc_douintvec(&tmp, write, buffer, lenp, ppos,  in proc_dou8vec_minmax()
881 	if (write)  in proc_dou8vec_minmax()
888 		const struct ctl_table *table, int write,  in __do_proc_doulongvec_minmax()  argument
897 	if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {  in __do_proc_doulongvec_minmax()
908 	if (write) {  in __do_proc_doulongvec_minmax()
920 		if (write) {  in __do_proc_doulongvec_minmax()
949 	if (!write && !first && left && !err)  in __do_proc_doulongvec_minmax()
951 	if (write && !err)  in __do_proc_doulongvec_minmax()
953 	if (write && first)  in __do_proc_doulongvec_minmax()
961 static int do_proc_doulongvec_minmax(const struct ctl_table *table, int write,  in do_proc_doulongvec_minmax()  argument
965 	return __do_proc_doulongvec_minmax(table->data, table, write,  in do_proc_doulongvec_minmax()
972  * @write: %TRUE if this is a write to the sysctl file
985 int proc_doulongvec_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_minmax()  argument
988     return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);  in proc_doulongvec_minmax()
994  * @write: %TRUE if this is a write to the sysctl file
1008 int proc_doulongvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_ms_jiffies_minmax()  argument
1011     return do_proc_doulongvec_minmax(table, write, buffer,  in proc_doulongvec_ms_jiffies_minmax()
1018 					 int write, void *data)  in do_proc_dointvec_jiffies_conv()  argument
1020 	if (write) {  in do_proc_dointvec_jiffies_conv()
1044 						int write, void *data)  in do_proc_dointvec_userhz_jiffies_conv()  argument
1046 	if (write) {  in do_proc_dointvec_userhz_jiffies_conv()
1067 					    int write, void *data)  in do_proc_dointvec_ms_jiffies_conv()  argument
1069 	if (write) {  in do_proc_dointvec_ms_jiffies_conv()
1091 						int *valp, int write, void *data)  in do_proc_dointvec_ms_jiffies_minmax_conv()  argument
1099 	int *ip = write ? &tmp : valp;  in do_proc_dointvec_ms_jiffies_minmax_conv()
1101 	ret = do_proc_dointvec_ms_jiffies_conv(negp, lvalp, ip, write, data);  in do_proc_dointvec_ms_jiffies_minmax_conv()
1105 	if (write) {  in do_proc_dointvec_ms_jiffies_minmax_conv()
1117  * @write: %TRUE if this is a write to the sysctl file
1129 int proc_dointvec_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_jiffies()  argument
1132     return do_proc_dointvec(table,write,buffer,lenp,ppos,  in proc_dointvec_jiffies()
1136 int proc_dointvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies_minmax()  argument
1143 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_ms_jiffies_minmax()
1150  * @write: %TRUE if this is a write to the sysctl file
1162 int proc_dointvec_userhz_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_userhz_jiffies()  argument
1165 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_userhz_jiffies()
1172  * @write: %TRUE if this is a write to the sysctl file
1184 int proc_dointvec_ms_jiffies(const struct ctl_table *table, int write, void *buffer,  in proc_dointvec_ms_jiffies()  argument
1187 	return do_proc_dointvec(table, write, buffer, lenp, ppos,  in proc_dointvec_ms_jiffies()
1192  * proc_do_large_bitmap - read/write from/to a large bitmap
1194  * @write: %TRUE if this is a write to the sysctl file
1208 int proc_do_large_bitmap(const struct ctl_table *table, int write,  in proc_do_large_bitmap()  argument
1218 	if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {  in proc_do_large_bitmap()
1223 	if (write) {  in proc_do_large_bitmap()
1324 		if (write) {  in proc_do_large_bitmap()
1340 int proc_dostring(const struct ctl_table *table, int write,  in proc_dostring()  argument
1346 int proc_dobool(const struct ctl_table *table, int write,  in proc_dobool()  argument
1352 int proc_dointvec(const struct ctl_table *table, int write,  in proc_dointvec()  argument
1358 int proc_douintvec(const struct ctl_table *table, int write,  in proc_douintvec()  argument
1364 int proc_dointvec_minmax(const struct ctl_table *table, int write,  in proc_dointvec_minmax()  argument
1370 int proc_douintvec_minmax(const struct ctl_table *table, int write,  in proc_douintvec_minmax()  argument
1376 int proc_dou8vec_minmax(const struct ctl_table *table, int write,  in proc_dou8vec_minmax()  argument
1382 int proc_dointvec_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_jiffies()  argument
1388 int proc_dointvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies_minmax()  argument
1394 int proc_dointvec_userhz_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_userhz_jiffies()  argument
1400 int proc_dointvec_ms_jiffies(const struct ctl_table *table, int write,  in proc_dointvec_ms_jiffies()  argument
1406 int proc_doulongvec_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_minmax()  argument
1412 int proc_doulongvec_ms_jiffies_minmax(const struct ctl_table *table, int write,  in proc_doulongvec_ms_jiffies_minmax()  argument
1418 int proc_do_large_bitmap(const struct ctl_table *table, int write,  in proc_do_large_bitmap()  argument
1427 int proc_do_static_key(const struct ctl_table *table, int write,  in proc_do_static_key()  argument
1441 	if (write && !capable(CAP_SYS_ADMIN))  in proc_do_static_key()
1446 	ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);  in proc_do_static_key()
1447 	if (write && !ret) {  in proc_do_static_key()