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-rw-r--r--kernel/sysctl.c116
1 files changed, 88 insertions, 28 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 476ac2522f18..a79ccf9d113b 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -92,13 +92,8 @@ extern char modprobe_path[];
92extern int sg_big_buff; 92extern int sg_big_buff;
93#endif 93#endif
94#ifdef CONFIG_SYSVIPC 94#ifdef CONFIG_SYSVIPC
95extern size_t shm_ctlmax; 95static int proc_do_ipc_string(ctl_table *table, int write, struct file *filp,
96extern size_t shm_ctlall; 96 void __user *buffer, size_t *lenp, loff_t *ppos);
97extern int shm_ctlmni;
98extern int msg_ctlmax;
99extern int msg_ctlmnb;
100extern int msg_ctlmni;
101extern int sem_ctls[];
102#endif 97#endif
103 98
104#ifdef __sparc__ 99#ifdef __sparc__
@@ -481,58 +476,58 @@ static ctl_table kern_table[] = {
481 { 476 {
482 .ctl_name = KERN_SHMMAX, 477 .ctl_name = KERN_SHMMAX,
483 .procname = "shmmax", 478 .procname = "shmmax",
484 .data = &shm_ctlmax, 479 .data = NULL,
485 .maxlen = sizeof (size_t), 480 .maxlen = sizeof (size_t),
486 .mode = 0644, 481 .mode = 0644,
487 .proc_handler = &proc_doulongvec_minmax, 482 .proc_handler = &proc_do_ipc_string,
488 }, 483 },
489 { 484 {
490 .ctl_name = KERN_SHMALL, 485 .ctl_name = KERN_SHMALL,
491 .procname = "shmall", 486 .procname = "shmall",
492 .data = &shm_ctlall, 487 .data = NULL,
493 .maxlen = sizeof (size_t), 488 .maxlen = sizeof (size_t),
494 .mode = 0644, 489 .mode = 0644,
495 .proc_handler = &proc_doulongvec_minmax, 490 .proc_handler = &proc_do_ipc_string,
496 }, 491 },
497 { 492 {
498 .ctl_name = KERN_SHMMNI, 493 .ctl_name = KERN_SHMMNI,
499 .procname = "shmmni", 494 .procname = "shmmni",
500 .data = &shm_ctlmni, 495 .data = NULL,
501 .maxlen = sizeof (int), 496 .maxlen = sizeof (int),
502 .mode = 0644, 497 .mode = 0644,
503 .proc_handler = &proc_dointvec, 498 .proc_handler = &proc_do_ipc_string,
504 }, 499 },
505 { 500 {
506 .ctl_name = KERN_MSGMAX, 501 .ctl_name = KERN_MSGMAX,
507 .procname = "msgmax", 502 .procname = "msgmax",
508 .data = &msg_ctlmax, 503 .data = NULL,
509 .maxlen = sizeof (int), 504 .maxlen = sizeof (int),
510 .mode = 0644, 505 .mode = 0644,
511 .proc_handler = &proc_dointvec, 506 .proc_handler = &proc_do_ipc_string,
512 }, 507 },
513 { 508 {
514 .ctl_name = KERN_MSGMNI, 509 .ctl_name = KERN_MSGMNI,
515 .procname = "msgmni", 510 .procname = "msgmni",
516 .data = &msg_ctlmni, 511 .data = NULL,
517 .maxlen = sizeof (int), 512 .maxlen = sizeof (int),
518 .mode = 0644, 513 .mode = 0644,
519 .proc_handler = &proc_dointvec, 514 .proc_handler = &proc_do_ipc_string,
520 }, 515 },
521 { 516 {
522 .ctl_name = KERN_MSGMNB, 517 .ctl_name = KERN_MSGMNB,
523 .procname = "msgmnb", 518 .procname = "msgmnb",
524 .data = &msg_ctlmnb, 519 .data = NULL,
525 .maxlen = sizeof (int), 520 .maxlen = sizeof (int),
526 .mode = 0644, 521 .mode = 0644,
527 .proc_handler = &proc_dointvec, 522 .proc_handler = &proc_do_ipc_string,
528 }, 523 },
529 { 524 {
530 .ctl_name = KERN_SEM, 525 .ctl_name = KERN_SEM,
531 .procname = "sem", 526 .procname = "sem",
532 .data = &sem_ctls, 527 .data = NULL,
533 .maxlen = 4*sizeof (int), 528 .maxlen = 4*sizeof (int),
534 .mode = 0644, 529 .mode = 0644,
535 .proc_handler = &proc_dointvec, 530 .proc_handler = &proc_do_ipc_string,
536 }, 531 },
537#endif 532#endif
538#ifdef CONFIG_MAGIC_SYSRQ 533#ifdef CONFIG_MAGIC_SYSRQ
@@ -1832,8 +1827,9 @@ static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
1832 return 0; 1827 return 0;
1833} 1828}
1834 1829
1835static int do_proc_dointvec(ctl_table *table, int write, struct file *filp, 1830static int __do_proc_dointvec(void *tbl_data, ctl_table *table,
1836 void __user *buffer, size_t *lenp, loff_t *ppos, 1831 int write, struct file *filp, void __user *buffer,
1832 size_t *lenp, loff_t *ppos,
1837 int (*conv)(int *negp, unsigned long *lvalp, int *valp, 1833 int (*conv)(int *negp, unsigned long *lvalp, int *valp,
1838 int write, void *data), 1834 int write, void *data),
1839 void *data) 1835 void *data)
@@ -1846,13 +1842,13 @@ static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
1846 char buf[TMPBUFLEN], *p; 1842 char buf[TMPBUFLEN], *p;
1847 char __user *s = buffer; 1843 char __user *s = buffer;
1848 1844
1849 if (!table->data || !table->maxlen || !*lenp || 1845 if (!tbl_data || !table->maxlen || !*lenp ||
1850 (*ppos && !write)) { 1846 (*ppos && !write)) {
1851 *lenp = 0; 1847 *lenp = 0;
1852 return 0; 1848 return 0;
1853 } 1849 }
1854 1850
1855 i = (int *) table->data; 1851 i = (int *) tbl_data;
1856 vleft = table->maxlen / sizeof(*i); 1852 vleft = table->maxlen / sizeof(*i);
1857 left = *lenp; 1853 left = *lenp;
1858 1854
@@ -1941,6 +1937,16 @@ static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
1941#undef TMPBUFLEN 1937#undef TMPBUFLEN
1942} 1938}
1943 1939
1940static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
1941 void __user *buffer, size_t *lenp, loff_t *ppos,
1942 int (*conv)(int *negp, unsigned long *lvalp, int *valp,
1943 int write, void *data),
1944 void *data)
1945{
1946 return __do_proc_dointvec(table->data, table, write, filp,
1947 buffer, lenp, ppos, conv, data);
1948}
1949
1944/** 1950/**
1945 * proc_dointvec - read a vector of integers 1951 * proc_dointvec - read a vector of integers
1946 * @table: the sysctl table 1952 * @table: the sysctl table
@@ -2074,7 +2080,7 @@ int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
2074 do_proc_dointvec_minmax_conv, &param); 2080 do_proc_dointvec_minmax_conv, &param);
2075} 2081}
2076 2082
2077static int do_proc_doulongvec_minmax(ctl_table *table, int write, 2083static int __do_proc_doulongvec_minmax(void *data, ctl_table *table, int write,
2078 struct file *filp, 2084 struct file *filp,
2079 void __user *buffer, 2085 void __user *buffer,
2080 size_t *lenp, loff_t *ppos, 2086 size_t *lenp, loff_t *ppos,
@@ -2088,13 +2094,13 @@ static int do_proc_doulongvec_minmax(ctl_table *table, int write,
2088 char buf[TMPBUFLEN], *p; 2094 char buf[TMPBUFLEN], *p;
2089 char __user *s = buffer; 2095 char __user *s = buffer;
2090 2096
2091 if (!table->data || !table->maxlen || !*lenp || 2097 if (!data || !table->maxlen || !*lenp ||
2092 (*ppos && !write)) { 2098 (*ppos && !write)) {
2093 *lenp = 0; 2099 *lenp = 0;
2094 return 0; 2100 return 0;
2095 } 2101 }
2096 2102
2097 i = (unsigned long *) table->data; 2103 i = (unsigned long *) data;
2098 min = (unsigned long *) table->extra1; 2104 min = (unsigned long *) table->extra1;
2099 max = (unsigned long *) table->extra2; 2105 max = (unsigned long *) table->extra2;
2100 vleft = table->maxlen / sizeof(unsigned long); 2106 vleft = table->maxlen / sizeof(unsigned long);
@@ -2179,6 +2185,17 @@ static int do_proc_doulongvec_minmax(ctl_table *table, int write,
2179#undef TMPBUFLEN 2185#undef TMPBUFLEN
2180} 2186}
2181 2187
2188static int do_proc_doulongvec_minmax(ctl_table *table, int write,
2189 struct file *filp,
2190 void __user *buffer,
2191 size_t *lenp, loff_t *ppos,
2192 unsigned long convmul,
2193 unsigned long convdiv)
2194{
2195 return __do_proc_doulongvec_minmax(table->data, table, write,
2196 filp, buffer, lenp, ppos, convmul, convdiv);
2197}
2198
2182/** 2199/**
2183 * proc_doulongvec_minmax - read a vector of long integers with min/max values 2200 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2184 * @table: the sysctl table 2201 * @table: the sysctl table
@@ -2367,6 +2384,49 @@ int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
2367 do_proc_dointvec_ms_jiffies_conv, NULL); 2384 do_proc_dointvec_ms_jiffies_conv, NULL);
2368} 2385}
2369 2386
2387#ifdef CONFIG_SYSVIPC
2388static int proc_do_ipc_string(ctl_table *table, int write, struct file *filp,
2389 void __user *buffer, size_t *lenp, loff_t *ppos)
2390{
2391 void *data;
2392 struct ipc_namespace *ns;
2393
2394 ns = current->nsproxy->ipc_ns;
2395
2396 switch (table->ctl_name) {
2397 case KERN_SHMMAX:
2398 data = &ns->shm_ctlmax;
2399 goto proc_minmax;
2400 case KERN_SHMALL:
2401 data = &ns->shm_ctlall;
2402 goto proc_minmax;
2403 case KERN_SHMMNI:
2404 data = &ns->shm_ctlmni;
2405 break;
2406 case KERN_MSGMAX:
2407 data = &ns->msg_ctlmax;
2408 break;
2409 case KERN_MSGMNI:
2410 data = &ns->msg_ctlmni;
2411 break;
2412 case KERN_MSGMNB:
2413 data = &ns->msg_ctlmnb;
2414 break;
2415 case KERN_SEM:
2416 data = &ns->sem_ctls;
2417 break;
2418 default:
2419 return -EINVAL;
2420 }
2421
2422 return __do_proc_dointvec(data, table, write, filp, buffer,
2423 lenp, ppos, NULL, NULL);
2424proc_minmax:
2425 return __do_proc_doulongvec_minmax(data, table, write, filp, buffer,
2426 lenp, ppos, 1l, 1l);
2427}
2428#endif
2429
2370#else /* CONFIG_PROC_FS */ 2430#else /* CONFIG_PROC_FS */
2371 2431
2372int proc_dostring(ctl_table *table, int write, struct file *filp, 2432int proc_dostring(ctl_table *table, int write, struct file *filp,