#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <stdlib.h>
#include <errno.h>
+#include <limits.h>
#include <pwd.h>
#include <unistd.h>
#include <syscall.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/resource.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdarg.h>
//--------------------------------------------------------------------
#include "vserver.h"
+#include "planetlab.h"
#undef CONFIG_VSERVER_LEGACY
-/* Null byte made explicit */
-#define NULLBYTE_SIZE 1
-
/* Base for all vserver roots for chroot */
#define VSERVER_ROOT_BASE "/vservers"
-static int
-_PERROR(const char *format, char *file, int line, int _errno, ...)
-{
- va_list ap;
-
- va_start(ap, _errno);
- fprintf(stderr, "%s:%d: ", file, line);
- vfprintf(stderr, format, ap);
- if (_errno)
- fprintf(stderr, ": %s (%d)", strerror(_errno), _errno);
- fputs("\n", stderr);
- fflush(stderr);
-
- return _errno;
-}
-
-#define PERROR(format, args...) _PERROR(format, __FILE__, __LINE__, errno, ## args)
-
/* Change to root:root (before entering new context) */
static int setuidgid_root()
{
return 0;
}
-#define WHITESPACE(buffer,index,len) \
- while(isspace((int)buffer[index])) \
- if (index < len) index++; else goto out;
-
-struct resources {
- char *name;
- int *limit;
-};
-
-#define VSERVERCONF "/etc/vservers/"
-static void get_limits(char *context, int *cpu, int *mem, int *task) {
- FILE *fb;
- size_t len = strlen(VSERVERCONF) + strlen(context) + strlen(".conf") + NULLBYTE_SIZE;
- char *conf = (char *)malloc(len);
- struct resources list[] =
- {{"MEMLIMIT", mem},
- {"CPULIMIT", cpu},
- {"TASKLIMIT", task},
- {0,0}};
- struct resources *r;
-
- sprintf(conf, "%s%s.conf", VSERVERCONF, context);
-
- /* open the conf file for reading */
- fb = fopen(conf,"r");
- if (fb != NULL) {
- size_t index;
- char *buffer = malloc(1000);
- char *p;
-
- /* the conf file exist */
- while((p=fgets(buffer,1000-1,fb))!=NULL) {
- index = 0;
- len = strnlen(buffer,1000);
- WHITESPACE(buffer,index,len);
- if (buffer[index] == '#')
- continue;
-
- for (r=list; r->name; r++)
- if ((p=strstr(&buffer[index],r->name))!=NULL) {
- /* adjust index into buffer */
- index+= (p-&buffer[index])+strlen(r->name);
-
- /* skip over whitespace */
- WHITESPACE(buffer,index,len);
-
- /* expecting to see = sign */
- if (buffer[index++]!='=') goto out;
-
- /* skip over whitespace */
- WHITESPACE(buffer,index,len);
-
- /* expecting to see a digit for number */
- if (!isdigit((int)buffer[index])) goto out;
-
- *r->limit = atoi(&buffer[index]);
- break;
- }
- }
- out:
- free(buffer);
- } else {
- fprintf(stderr,"cannot open %s\n",conf);
- }
- free(conf);
-}
-
-
-static int sandbox_processes(xid_t xid, char *context)
+static int sandbox_processes(xid_t ctx, char *context)
{
#ifdef CONFIG_VSERVER_LEGACY
int flags;
flags |= 1; /* VX_INFO_LOCK -- cannot request a new vx_id */
/* flags |= 4; VX_INFO_NPROC -- limit number of procs in a context */
- (void) vc_new_s_context(xid, 0, flags);
+ (void) vc_new_s_context(ctx, 0, flags);
/* use legacy dirty hack for capremove */
if (vc_new_s_context(VC_SAMECTX, vc_get_insecurebcaps(), flags) == VC_NOCTX) {
exit(1);
}
#else
- struct vc_ctx_caps caps;
- struct vc_ctx_flags flags;
- int cpu = VC_LIM_KEEP;
- int mem = VC_LIM_KEEP;
- int task = VC_LIM_KEEP;
- get_limits(context,&cpu, &mem, &task);
- (void) (sandbox_chroot(xid));
-
- caps.ccaps = ~vc_get_insecureccaps();
- caps.cmask = ~0ull;
- caps.bcaps = ~vc_get_insecurebcaps();
- caps.bmask = ~0ull;
-
- flags.flagword = VC_VXF_INFO_LOCK;
- flags.mask = VC_VXF_STATE_SETUP | VC_VXF_INFO_LOCK;
-
- errno = 0;
- if ((vc_ctx_create(xid) == VC_NOCTX) && (errno != EEXIST)) {
- PERROR("vc_ctx_create(%d)", xid);
- exit(1);
- }
-
- if (errno != EEXIST) {
- struct vc_rlimit limits;
- /* The context did not exist before, which requires that we set the various limit */
-
- /* CPU */
- /* not yet */
-
- /* MEM */
- limits.min = VC_LIM_KEEP;
- limits.soft = VC_LIM_KEEP;
- limits.hard = mem;
- if (vc_set_rlimit(xid, 5, &limits)) {
- }
-
- /* TASK */
- limits.min = VC_LIM_KEEP;
- limits.soft = VC_LIM_KEEP;
- limits.hard = task;
- if (vc_set_rlimit(xid, 6, &limits)) {
- /* setting limit failed */
- }
- }
-
- if (vc_set_ccaps(xid, &caps) == -1) {
- PERROR("vc_set_ccaps(%d, 0x%16ullx/0x%16ullx, 0x%16ullx/0x%16ullx)\n",
- xid, caps.ccaps, caps.cmask, caps.bcaps, caps.bmask);
- exit(1);
- }
-
- if (vc_set_cflags(xid, &flags) == -1) {
- PERROR("vc_set_cflags(%d, 0x%16llx/0x%16llx)\n",
- xid, flags.flagword, flags.mask);
- exit(1);
- }
+ int ctx_is_new;
+ struct sliver_resources slr;
+ char hostname[HOST_NAME_MAX+1];
+ pl_get_limits(context,&slr);
+
+ if (gethostname(hostname, sizeof hostname) == -1)
+ {
+ PERROR("gethostname(...)");
+ exit(1);
+ }
+
+ /* check whether the slice has been taken off of the whitelist */
+ if (slr.vs_whitelisted==0)
+ {
+ fprintf(stderr, "*** %s: %s has not been allocated resources on this node ***\n", hostname, context);
+ exit(0);
+ }
+
+ /* check whether the slice has been suspended */
+ if (slr.vs_cpu==0)
+ {
+ fprintf(stderr, "*** %s: %s has zero cpu resources and presumably it has been disabled/suspended ***\n", hostname, context);
+ exit(0);
+ }
+
+ (void) (sandbox_chroot(ctx));
+
+ if ((ctx_is_new = pl_chcontext(ctx, ~vc_get_insecurebcaps(),&slr)) < 0)
+ {
+ PERROR("pl_chcontext(%u)", ctx);
+ exit(1);
+ }
+ if (ctx_is_new)
+ {
+ pl_set_limits(ctx,&slr);
+ pl_setup_done(ctx);
+ }
#endif
return 0;
}
git://git.onelab.eu / util-vserver.git / blobdiff