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make getsysinfo() a system-land call

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This commit is contained in:
David van Moolenbroek 2010-09-14 21:50:05 +00:00
parent d299a6422b
commit 354da24f5b
24 changed files with 89 additions and 240 deletions
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6
include/minix/callnr.h
View file

@ -69,8 +69,8 @@
#define REBOOT 76
#define SVRCTL 77
#define SYSUNAME 78
#define GETSYSINFO 79 /* to PM, VFS, RS, or DS */
#define GETDENTS 80 /* to FS */
#define GETSYSINFO 79 /* to PM or VFS (obsolete) */
#define GETDENTS 80 /* to VFS */
#define LLSEEK 81 /* to VFS */
#define FSTATFS 82 /* to VFS */
#define STATVFS 83 /* to VFS */
@ -87,7 +87,7 @@
#define FTRUNCATE 94 /* to VFS */
#define FCHMOD 95 /* to VFS */
#define FCHOWN 96 /* to VFS */
#define GETSYSINFO_UP 97 /* to PM or VFS */
#define GETSYSINFO_UP 97 /* to PM (obsolete) */
#define SPROF 98 /* to PM */
#define CPROF 99 /* to PM */

12
include/minix/com.h
View file

@ -877,8 +877,10 @@
#define PM_NUID m2_i1
#define PM_NGID m2_i2
/* Field names for GETSYSINFO_UP (PM). */
/* Field names for GETSYSINFO_UP (PM) (obsolete). */
#define SIU_WHAT m2_i1
# define SIU_LOADINFO 1 /* retrieve load info data */
# define SIU_SYSTEMHZ 2 /* retrieve system clock frequency */
#define SIU_LEN m2_i2
#define SIU_WHERE m2_p1
@ -902,6 +904,14 @@
# define GCOV_BUFF_P m1_p1
# define GCOV_BUFF_SZ m1_i1
/* Common request to several system servers: retrieve system information.
* The GETSYSINFO userland call is an (old and deprecated) alias of this, so do
* not change the fields or old userland applications may break.
*/
#define COMMON_GETSYSINFO (COMMON_RQ_BASE+2)
# define SI_WHAT m1_i1
# define SI_WHERE m1_p1
/*===========================================================================*
* Messages for VM server *
*===========================================================================*/

16
include/minix/sysinfo.h
View file

@ -6,15 +6,15 @@
#include <minix/type.h>
_PROTOTYPE( int getsysinfo, (endpoint_t who, int what, void *where) );
_PROTOTYPE( int minix_getkproctab, (void *pr, int nprocs, int assert));
_PROTOTYPE( ssize_t getsysinfo_up, (endpoint_t who, int what, size_t size,
void *where));
#define SIU_LOADINFO 1 /* retrieve load info data */
#define SIU_SYSTEMHZ 2 /* retrieve system clock frequency */
#define SIU_IDLETSC 3 /* retrieve cumulative idle timestamp count */
/* Exported system parameters. */
/* What system info to retrieve with sysgetinfo(). */
#define SI_PROC_TAB 2 /* copy of entire process table */
#define SI_DMAP_TAB 3 /* get device <-> driver mappings */
#define SI_DATA_STORE 5 /* get copy of data store mappings */
#define SI_SUBSCRIPTION 6 /* get copy of data store subscriptions */
#define SI_LOADINFO 7 /* get copy of load average structure */
#define SI_CALL_STATS 9 /* system call statistics */
#define SI_PROCPUB_TAB 11 /* copy of public entries of process table */
#endif

15
include/minix/type.h
View file

@ -198,20 +198,5 @@ struct k_randomness {
} bin[RANDOM_SOURCES];
};
/* information on PCI devices */
#define PCIINFO_ENTRY_SIZE 80
struct pciinfo_entry {
u16_t pie_vid;
u16_t pie_did;
char pie_name[PCIINFO_ENTRY_SIZE];
};
struct pciinfo {
size_t pi_count;
struct pciinfo_entry pi_entries[NR_PCIDEV];
};
#endif /* _TYPE_H */

15
include/unistd.h
View file

@ -41,20 +41,6 @@
#define _PM_SEG_FLAG (1L << 30) /* for read() and write() to FS by PM */
#endif
/* What system info to retrieve with sysgetinfo(). */
#define SI_KINFO 0 /* get kernel info via PM */
#define SI_PROC_ADDR 1 /* address of process table */
#define SI_PROC_TAB 2 /* copy of entire process table */
#define SI_DMAP_TAB 3 /* get device <-> driver mappings */
#define SI_MEM_ALLOC 4 /* get memory allocation data */
#define SI_DATA_STORE 5 /* get copy of data store mappings */
#define SI_SUBSCRIPTION 6 /* get copy of data store subscriptions */
#define SI_LOADINFO 7 /* get copy of load average structure */
#define SI_KPROC_TAB 8 /* copy of kernel process table */
#define SI_CALL_STATS 9 /* system call statistics */
#define SI_PCI_INFO 10 /* get kernel info via PM */
#define SI_PROCPUB_TAB 11 /* copy of public entries of process table */
/* NULL must be defined in <unistd.h> according to POSIX Sec. 2.7.1. */
#include <sys/null.h>
@ -198,7 +184,6 @@ _PROTOTYPE( char *crypt, (const char *_key, const char *_salt) );
#endif
_PROTOTYPE( int getsysinfo, (endpoint_t who, int what, void *where) );
_PROTOTYPE( int getsigset, (sigset_t *sigset) );
_PROTOTYPE( int getprocnr, (void) );
_PROTOTYPE( int getnprocnr, (pid_t pid) );

1
lib/libc/other/Makefile.inc
View file

@ -20,7 +20,6 @@ SRCS+= \
_getpprocnr.c \
_getprocnr.c \
_getsigset.c \
_getsysinfo.c \
_lseek64.c \
_mapdriver.c \
_mcontext.c \

77
lib/libc/other/_getsysinfo.c
View file

@ -1,77 +0,0 @@
#include <lib.h>
#include <unistd.h>
#include <timers.h>
#include <minix/endpoint.h>
#define getsysinfo _getsysinfo
#define getsysinfo_up _getsysinfo_up
#include <minix/sysinfo.h>
#include <minix/const.h>
#include <minix/ipc.h>
#include <minix/com.h>
#include <minix/sysinfo.h>
#include <minix/config.h>
#include <minix/type.h>
#include <minix/const.h>
#include <stdio.h>
#include <stdlib.h>
#include <machine/archtypes.h>
#include "../../../kernel/proc.h"
PUBLIC int getsysinfo(who, what, where)
endpoint_t who; /* from whom to request info */
int what; /* what information is requested */
void *where; /* where to put it */
{
message m;
m.m1_i1 = what;
m.m1_p1 = where;
if (_syscall(who, GETSYSINFO, &m) < 0) return(-1);
return(0);
}
PUBLIC int minix_getkproctab(void *vpr, int nprocs, int assert)
{
int r, i, fail = 0;
struct proc *pr = vpr;
if((r=getsysinfo(PM_PROC_NR, SI_KPROC_TAB, pr)) < 0)
return r;
for(i = 0; i < nprocs; i++) {
if(pr[i].p_magic != PMAGIC) {
fail = 1;
break;
}
}
if(!fail)
return 0;
if(assert) {
fprintf(stderr, "%s: process table failed sanity check.\n", getprogname());
fprintf(stderr, "is kernel out of sync?\n");
exit(1);
}
errno = ENOSYS;
return -1;
}
/* Unprivileged variant of getsysinfo. */
PUBLIC ssize_t getsysinfo_up(who, what, size, where)
endpoint_t who; /* from whom to request info */
int what; /* what information is requested */
size_t size; /* input and output size */
void *where; /* where to put it */
{
message m;
m.SIU_WHAT = what;
m.SIU_WHERE = where;
m.SIU_LEN = size;
return _syscall(who, GETSYSINFO_UP, &m);
}

1
lib/libc/syscall/Makefile.inc
View file

@ -56,7 +56,6 @@ SRCS+= \
getpprocnr.S \
getprocnr.S \
getsigset.S \
getsysinfo.S \
getuid.S \
ioctl.S \
isatty.S \

10
lib/libc/syscall/getsysinfo.S
View file

@ -1,10 +0,0 @@
#include <machine/asm.h>
IMPORT(_getsysinfo)
ENTRY(getsysinfo)
jmp _C_LABEL(_getsysinfo)
IMPORT(_getsysinfo_up)
ENTRY(getsysinfo_up)
jmp _C_LABEL(_getsysinfo_up)

1
lib/libsys/Makefile
View file

@ -5,6 +5,7 @@ LIB= sys
SRCS= \
alloc_util.c \
assert.c \
getsysinfo.c \
kernel_call.c \
panic.c \
pci_attr_r16.c \

22
lib/libsys/getidle.c
View file

@ -6,21 +6,19 @@
* getidle();
* ...
* idleperc = getidle();
* printf("CPU usage: %lg%%\n", 100.0 - idleperc);
* if (idleperc >= 0.0)
* printf("CPU usage: %lg%%\n", 100.0 - idleperc);
*
* This routine goes through PM to get the idle time, rather than making the
* sys_getinfo() call to the kernel directly. This means that it can be used
* by non-system processes as well, but it will incur some extra overhead in
* the system case. The overhead does not end up being measured, because the
* system is clearly not idle while the system calls are being made. In any
* case, for this reason, only one getidle() run is allowed at a time.
* Notes:
* - This functionality can only be used by system processes.
* - The kernel has to be compiled with CONFIG_IDLE_TSC support.
* - Only one getidle() run is allowed per process at a time.
*
* Note that the kernel has to be compiled with CONFIG_IDLE_TSC support.
*/
#define _MINIX 1
#define _SYSTEM 1
#include <minix/sysinfo.h>
#include <lib.h>
#include <minix/u64.h>
#include <minix/sysutil.h>
@ -52,8 +50,7 @@ double getidle(void)
int r;
if (!running) {
r = getsysinfo_up(PM_PROC_NR, SIU_IDLETSC, sizeof(idle), &idle);
if (r != sizeof(idle))
if ((r = sys_getidletsc(&idle)) != OK)
return -1.0;
running = 1;
@ -67,8 +64,7 @@ double getidle(void)
running = 0;
r = getsysinfo_up(PM_PROC_NR, SIU_IDLETSC, sizeof(idle2), &idle2);
if (r != sizeof(idle2))
if ((r = sys_getidletsc(&idle2)) != OK)
return -1.0;
idelta = sub64(idle2, idle);

16
lib/libsys/getsysinfo.c Normal file
View file

@ -0,0 +1,16 @@
#include <lib.h>
#include <minix/sysinfo.h>
#include <minix/com.h>
PUBLIC int getsysinfo(who, what, where)
endpoint_t who; /* from whom to request info */
int what; /* what information is requested */
void *where; /* where to put it */
{
message m;
m.SI_WHAT = what;
m.SI_WHERE = where;
if (_syscall(who, COMMON_GETSYSINFO, &m) < 0) return(-1);
return(0);
}

2
lib/libsys/pci_dev_name.c
View file

@ -11,7 +11,7 @@ pci_dev_name.c
*===========================================================================*/
PUBLIC char *pci_dev_name(u16_t vid, u16_t did)
{
static char name[PCIINFO_ENTRY_SIZE]; /* We need a better interface for this */
static char name[80]; /* We need a better interface for this */
int r;
cp_grant_id_t gid;

2
servers/ds/inc.h
View file

@ -21,6 +21,7 @@
#include <minix/com.h>
#include <minix/ds.h>
#include <minix/syslib.h>
#include <minix/sysinfo.h>
#include <minix/sysutil.h>
#include <minix/keymap.h>
#include <minix/bitmap.h>
@ -29,7 +30,6 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include "proto.h"

2
servers/ds/main.c
View file

@ -72,7 +72,7 @@ PUBLIC int main(int argc, char **argv)
case DS_SNAPSHOT:
result = do_snapshot(&m);
break;
case GETSYSINFO:
case COMMON_GETSYSINFO:
result = do_getsysinfo(&m);
break;
default:

2
servers/is/inc.h
View file

@ -18,6 +18,7 @@
#include <minix/const.h>
#include <minix/com.h>
#include <minix/syslib.h>
#include <minix/sysinfo.h>
#include <minix/sysutil.h>
#include <minix/keymap.h>
#include <minix/bitmap.h>
@ -25,7 +26,6 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <machine/archtypes.h>

3
servers/pm/main.c
View file

@ -128,6 +128,9 @@ PUBLIC int main()
else
result= ENOSYS;
break;
case COMMON_GETSYSINFO:
result = do_getsysinfo();
break;
default:
/* Else, if the system call number is valid, perform the
* call.

86
servers/pm/misc.c
View file

@ -60,8 +60,6 @@ PRIVATE char *uts_tbl[] = {
PUBLIC unsigned long calls_stats[NCALLS];
#endif
FORWARD _PROTOTYPE( int getpciinfo, (struct pciinfo *pciinfo) );
/*===========================================================================*
* do_procstat *
*===========================================================================*/
@ -160,7 +158,6 @@ PUBLIC int do_getsysinfo()
vir_bytes src_addr, dst_addr;
struct kinfo kinfo;
struct loadinfo loadinfo;
struct pciinfo pciinfo;
static struct proc proctab[NR_PROCS+NR_TASKS];
size_t len;
int s, r;
@ -174,38 +171,25 @@ PUBLIC int do_getsysinfo()
return EPERM;
}
/* This call should no longer be used by user applications. In the future,
* requests from non-system processes should be denied. For now, just warn.
*/
if (call_nr == GETSYSINFO)
{
printf("PM: obsolete call of do_getsysinfo() by proc %d '%s'\n",
mp->mp_endpoint, mp->mp_name);
}
switch(m_in.info_what) {
case SI_KINFO: /* kernel info is obtained via PM */
sys_getkinfo(&kinfo);
src_addr = (vir_bytes) &kinfo;
len = sizeof(struct kinfo);
break;
case SI_PROC_ADDR: /* get address of PM process table */
proc_addr = &mproc[0];
src_addr = (vir_bytes) &proc_addr;
len = sizeof(struct mproc *);
break;
case SI_PROC_TAB: /* copy entire process table */
src_addr = (vir_bytes) mproc;
len = sizeof(struct mproc) * NR_PROCS;
break;
case SI_KPROC_TAB: /* copy entire process table */
if((r=sys_getproctab(proctab)) != OK)
return r;
src_addr = (vir_bytes) proctab;
len = sizeof(proctab);
break;
case SI_LOADINFO: /* loadinfo is obtained via PM */
sys_getloadinfo(&loadinfo);
src_addr = (vir_bytes) &loadinfo;
len = sizeof(struct loadinfo);
break;
case SI_PCI_INFO: /* PCI info is obtained via PM */
if ((r=getpciinfo(&pciinfo)) != OK)
return r;
src_addr = (vir_bytes) &pciinfo;
len = sizeof(struct pciinfo);
break;
#if ENABLE_SYSCALL_STATS
case SI_CALL_STATS:
src_addr = (vir_bytes) calls_stats;
@ -230,9 +214,11 @@ PUBLIC int do_getsysinfo_up()
vir_bytes src_addr, dst_addr;
struct loadinfo loadinfo;
size_t len, real_len;
u64_t idle_tsc;
int s;
printf("PM: obsolete call of do_getsysinfo_up() by proc %d '%s'\n",
mp->mp_endpoint, mp->mp_name);
switch(m_in.SIU_WHAT) {
case SIU_LOADINFO: /* loadinfo is obtained via PM */
if ((s = sys_getloadinfo(&loadinfo)) != OK)
@ -244,12 +230,6 @@ PUBLIC int do_getsysinfo_up()
src_addr = (vir_bytes) &system_hz;
real_len = sizeof(system_hz);
break;
case SIU_IDLETSC:
if ((s = sys_getidletsc(&idle_tsc)) != OK)
return s;
src_addr = (vir_bytes) &idle_tsc;
real_len = sizeof(idle_tsc);
break;
default:
return(EINVAL);
}
@ -580,45 +560,3 @@ char *brk_addr;
_brksize = brk_addr;
return 0;
}
/*===========================================================================*
* getpciinfo *
*===========================================================================*/
PRIVATE int getpciinfo(pciinfo)
struct pciinfo *pciinfo;
{
int devind, r;
struct pciinfo_entry *entry;
char *name;
u16_t vid, did;
/* look up PCI process number */
pci_init();
/* start enumerating devices */
entry = pciinfo->pi_entries;
r = pci_first_dev(&devind, &vid, &did);
while (r)
{
/* fetch device name */
name = pci_dev_name(vid, did);
if (!name)
name = "";
/* store device information in table */
assert((char *) entry < (char *) (pciinfo + 1));
entry->pie_vid = vid;
entry->pie_did = did;
strncpy(entry->pie_name, name, sizeof(entry->pie_name));
entry->pie_name[sizeof(entry->pie_name) - 1] = 0;
entry++;
/* continue with the next device */
r = pci_next_dev(&devind, &vid, &did);
}
/* store number of entries */
pciinfo->pi_count = entry - pciinfo->pi_entries;
return OK;
}

2
servers/rs/inc.h
View file

@ -26,6 +26,7 @@
#include <minix/const.h>
#include <minix/com.h>
#include <minix/syslib.h>
#include <minix/sysinfo.h>
#include <minix/sysutil.h>
#include <minix/keymap.h>
#include <minix/bitmap.h>
@ -46,7 +47,6 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <assert.h>
#include <sys/param.h>

5
servers/rs/main.c
View file

@ -91,7 +91,7 @@ PUBLIC int main(void)
* Handle the request and send a reply to the caller.
*/
else {
if (call_nr != GETSYSINFO &&
if (call_nr != COMMON_GETSYSINFO &&
(call_nr < RS_RQ_BASE || call_nr >= RS_RQ_BASE+0x100))
{
/* Ignore invalid requests. Do not try to reply. */
@ -111,7 +111,8 @@ PUBLIC int main(void)
case RS_UPDATE: result = do_update(&m); break;
case RS_CLONE: result = do_clone(&m); break;
case RS_EDIT: result = do_edit(&m); break;
case GETSYSINFO: result = do_getsysinfo(&m); break;
case COMMON_GETSYSINFO:
result = do_getsysinfo(&m); break;
case RS_LOOKUP: result = do_lookup(&m); break;
/* Ready messages. */
case RS_INIT: result = do_init_ready(&m); break;

12
servers/vfs/fscall.c
View file

@ -130,18 +130,14 @@ message *m; /* request/reply message pointer */
/* Initialize global variables for the nested call */
set_globals(m);
/* Perform the nested call */
if (call_nr < 0 || call_nr >= NCALLS) {
/* Perform the nested call - only getsysinfo() is allowed right now */
if (call_nr == COMMON_GETSYSINFO) {
r = do_getsysinfo();
} else {
printf("VFS: invalid nested call %d from FS %d\n", call_nr,
who_e);
r = ENOSYS;
} else {
#if ENABLE_SYSCALL_STATS
calls_stats[call_nr]++;
#endif
r = (*call_vec[call_nr])();
}
/* Store the result, and restore original global variables */

5
servers/vfs/main.c
View file

@ -162,7 +162,10 @@ PUBLIC int main(void)
error= do_mapdriver();
if (error != SUSPEND) reply(who_e, error);
break;
case COMMON_GETSYSINFO:
error= do_getsysinfo();
if (error != SUSPEND) reply(who_e, error);
break;
default:
/* Call the internal function that does the work. */
if (call_nr < 0 || call_nr >= NCALLS) {

14
servers/vfs/misc.c
View file

@ -26,6 +26,7 @@
#include <minix/safecopies.h>
#include <minix/endpoint.h>
#include <minix/com.h>
#include <minix/sysinfo.h>
#include <minix/u64.h>
#include <sys/ptrace.h>
#include <sys/svrctl.h>
@ -72,12 +73,15 @@ PUBLIC int do_getsysinfo()
if (!super_user) return(EPERM);
/* This call should no longer be used by user applications. In the future,
* requests from non-system processes should be denied. For now, just warn.
*/
if (call_nr == GETSYSINFO) {
printf("VFS: obsolete call of do_getsysinfo() by proc %d\n",
fp->fp_endpoint);
}
switch(m_in.info_what) {
case SI_PROC_ADDR:
proc_addr = &fproc[0];
src_addr = (vir_bytes) &proc_addr;
len = sizeof(struct fproc *);
break;
case SI_PROC_TAB:
src_addr = (vir_bytes) fproc;
len = sizeof(struct fproc) * NR_PROCS;

2
servers/vfs/table.c
View file

@ -112,7 +112,7 @@ PUBLIC _PROTOTYPE (int (*call_vec[]), (void) ) = {
do_ftruncate, /* 94 = truncate */
do_chmod, /* 95 = fchmod */
do_chown, /* 96 = fchown */
no_sys, /* 97 = getsysinfo_up */
no_sys, /* 97 = (getsysinfo_up) */
no_sys, /* 98 = (sprofile) */
no_sys, /* 99 = (cprofile) */
/* THE MINIX3 ABI ENDS HERE */