1 /* Copyright 2005 Princeton University
3 Redistribution and use in source and binary forms, with or without
4 modification, are permitted provided that the following conditions
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above
11 copyright notice, this list of conditions and the following
12 disclaimer in the documentation and/or other materials provided
13 with the distribution.
15 * Neither the name of the copyright holder nor the names of its
16 contributors may be used to endorse or promote products derived
17 from this software without specific prior written permission.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PRINCETON
23 UNIVERSITY OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
26 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
29 WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 POSSIBILITY OF SUCH DAMAGE.
45 #include <sys/resource.h>
49 #include "planetlab.h"
51 #ifndef VC_NXC_RAW_SOCKET
52 # define VC_NXC_RAW_SOCKET 0x00000200ull
54 #ifndef VC_NXC_RAW_SEND
55 # define VC_NXC_RAW_SEND 0x00000400ull
57 #ifndef VC_NXF_LBACK_ALLOW
58 # define VC_NXF_LBACK_ALLOW 0x00000400ull
62 create_context(xid_t ctx, uint64_t bcaps)
64 struct vc_ctx_caps vc_caps;
65 struct vc_net_flags vc_nf;
66 struct vc_net_caps vc_ncaps;
68 /* Create network context */
69 if (vc_net_create(ctx) == VC_NOCTX) {
75 /* Make the network context persistent */
76 vc_nf.mask = vc_nf.flagword = VC_NXF_PERSISTENT | VC_NXF_LBACK_ALLOW;
77 if (vc_set_nflags(ctx, &vc_nf))
80 /* Give it raw sockets capabilities */
81 vc_ncaps.ncaps = vc_ncaps.cmask = VC_NXC_RAW_ICMP | VC_NXC_RAW_SOCKET;
82 if (vc_set_ncaps(ctx, &vc_ncaps))
86 /* Create tag context */
87 if (vc_tag_create(ctx) == VC_NOCTX)
92 * Create context info - this sets the STATE_SETUP and STATE_INIT flags.
94 if (vc_ctx_create(ctx, 0) == VC_NOCTX)
97 /* Set capabilities - these don't take effect until SETUP flag is unset */
98 vc_caps.bcaps = bcaps;
99 vc_caps.bmask = ~0ULL; /* currently unused */
100 vc_caps.ccaps = 0; /* don't want any of these */
101 vc_caps.cmask = ~0ULL;
102 if (vc_set_ccaps(ctx, &vc_caps))
105 if (pl_setsched(ctx, 0, 1) < 0) {
106 PERROR("pl_setsched(%u)", ctx);
114 pl_setup_done(xid_t ctx)
116 struct vc_ctx_flags vc_flags;
118 /* unset SETUP flag - this allows other processes to migrate */
119 /* set the PERSISTENT flag - so the context doesn't vanish */
120 /* Don't clear the STATE_INIT flag, as that would make us the init task. */
121 vc_flags.mask = VC_VXF_STATE_SETUP|VC_VXF_PERSISTENT;
122 vc_flags.flagword = VC_VXF_PERSISTENT;
123 if (vc_set_cflags(ctx, &vc_flags))
129 #define RETRY_LIMIT 10
132 pl_chcontext(xid_t ctx, uint64_t bcaps, const struct sliver_resources *slr)
135 int net_migrated = 0;
137 if (pl_set_ulimits(slr) != 0)
142 struct vc_ctx_flags vc_flags;
144 if (vc_get_cflags(ctx, &vc_flags))
149 /* context doesn't exist - create it */
150 if (create_context(ctx, bcaps))
153 /* another process beat us in a race */
156 /* another process is creating - poll the SETUP flag */
161 /* created context and migrated to it i.e., we're done */
165 /* check the SETUP flag */
166 if (vc_flags.flagword & VC_VXF_STATE_SETUP)
168 /* context is still being setup - wait a while then retry */
169 if (retry_count++ >= RETRY_LIMIT)
178 /* context has been setup */
180 if (net_migrated || !vc_net_migrate(ctx))
182 if (!vc_tag_migrate(ctx) && !vc_ctx_migrate(ctx, 0))
187 /* context disappeared - retry */
193 /* it's okay for a syscall to fail because the context doesn't exist */
194 #define VC_SYSCALL(x) \
198 return errno == ESRCH ? 0 : -1; \
203 pl_setsched(xid_t ctx, uint32_t cpu_min, uint32_t cpu_share)
205 struct vc_set_sched vc_sched;
206 struct vc_ctx_flags vc_flags;
208 vc_sched.set_mask = (VC_VXSM_FILL_RATE | VC_VXSM_INTERVAL | VC_VXSM_TOKENS |
209 VC_VXSM_TOKENS_MIN | VC_VXSM_TOKENS_MAX | VC_VXSM_MSEC |
210 VC_VXSM_FILL_RATE2 | VC_VXSM_INTERVAL2 | VC_VXSM_FORCE);
211 vc_sched.fill_rate = cpu_min; /* percent reserved */
212 vc_sched.interval = 100;
213 vc_sched.fill_rate2 = cpu_share; /* best-effort fair share of unreserved */
214 vc_sched.interval2 = 1000; /* milliseconds */
215 vc_sched.tokens = 100; /* initial allocation of tokens */
216 vc_sched.tokens_min = 50; /* need this many tokens to run */
217 vc_sched.tokens_max = 100; /* max accumulated number of tokens */
220 if (cpu_share == (uint32_t)VC_LIM_KEEP)
221 vc_sched.set_mask &= ~(VC_VXSM_FILL_RATE|VC_VXSM_FILL_RATE2);
223 vc_sched.set_mask |= VC_VXSM_IDLE_TIME;
226 VC_SYSCALL(vc_set_sched(ctx, &vc_sched));
228 vc_flags.mask = VC_VXF_SCHED_FLAGS;
229 vc_flags.flagword = VC_VXF_SCHED_HARD;
230 VC_SYSCALL(vc_set_cflags(ctx, &vc_flags));
240 struct pl_resources {
244 unsigned long long *limit;
245 unsigned long int *personality;
249 #define WHITESPACE(buffer,index,len) \
250 while(isspace((int)buffer[index])) \
251 if (index < len) index++; else goto out;
253 #define VSERVERCONF "/etc/vservers/"
255 pl_get_limits(const char *context, struct sliver_resources *slr)
259 size_t len = strlen(VSERVERCONF) + strlen(context) + NULLBYTE_SIZE;
260 char *conf = (char *)malloc(len + strlen("rlimits/openfd.hard"));
261 struct pl_resources *r;
262 struct pl_resources sliver_list[] = {
263 {"sched/fill-rate2", TYPE_LONG, &slr->vs_cpu},
265 {"rlimits/nproc.hard", TYPE_LONG, &slr->vs_nproc.hard},
266 {"rlimits/nproc.soft", TYPE_LONG, &slr->vs_nproc.soft},
267 {"rlimits/nproc.min", TYPE_LONG, &slr->vs_nproc.min},
269 {"rlimits/rss.hard", TYPE_LONG, &slr->vs_rss.hard},
270 {"rlimits/rss.soft", TYPE_LONG, &slr->vs_rss.soft},
271 {"rlimits/rss.min", TYPE_LONG, &slr->vs_rss.min},
273 {"rlimits/as.hard", TYPE_LONG, &slr->vs_as.hard},
274 {"rlimits/as.soft", TYPE_LONG, &slr->vs_as.soft},
275 {"rlimits/as.min", TYPE_LONG, &slr->vs_as.min},
277 {"rlimits/openfd.hard", TYPE_LONG, &slr->vs_openfd.hard},
278 {"rlimits/openfd.soft", TYPE_LONG, &slr->vs_openfd.soft},
279 {"rlimits/openfd.min", TYPE_LONG, &slr->vs_openfd.min},
281 {"personality", TYPE_PERS, &slr->personality},
286 sprintf(conf, "%s%s", VSERVERCONF, context);
288 slr->vs_rss.hard = VC_LIM_KEEP;
289 slr->vs_rss.soft = VC_LIM_KEEP;
290 slr->vs_rss.min = VC_LIM_KEEP;
292 slr->vs_as.hard = VC_LIM_KEEP;
293 slr->vs_as.soft = VC_LIM_KEEP;
294 slr->vs_as.min = VC_LIM_KEEP;
296 slr->vs_nproc.hard = VC_LIM_KEEP;
297 slr->vs_nproc.soft = VC_LIM_KEEP;
298 slr->vs_nproc.min = VC_LIM_KEEP;
300 slr->vs_openfd.hard = VC_LIM_KEEP;
301 slr->vs_openfd.soft = VC_LIM_KEEP;
302 slr->vs_openfd.min = VC_LIM_KEEP;
304 slr->personality = 0;
306 cwd = open(".", O_RDONLY);
308 perror("cannot get a handle on .");
311 if (chdir(conf) == -1) {
312 fprintf(stderr, "cannot chdir to ");
317 for (r = &sliver_list[0]; r->name; r++) {
319 fb = fopen(r->name, "r");
322 if (fgets(buf, sizeof(buf), fb) != NULL) {
324 /* remove trailing newline */
325 if (buf[len-1] == '\n') {
329 if ( (r->type == TYPE_LONG) && isdigit(*buf)) {
330 *r->limit = atoi(buf);
331 } else if ( (r->type == TYPE_PERS) && isalpha(*buf)) {
332 unsigned long int res;
333 res = vc_str2personalitytype(buf,len);
334 if (res != VC_BAD_PERSONALITY) {
335 *r->personality = res;
351 adjust_lim(const struct vc_rlimit *vcr, struct rlimit *lim)
354 if (vcr->min != VC_LIM_KEEP) {
355 if (vcr->min > lim->rlim_cur) {
356 lim->rlim_cur = vcr->min;
359 if (vcr->min > lim->rlim_max) {
360 lim->rlim_max = vcr->min;
365 if (vcr->soft != VC_LIM_KEEP) {
366 switch (vcr->min != VC_LIM_KEEP) {
368 if (vcr->soft < vcr->min)
371 lim->rlim_cur = vcr->soft;
376 if (vcr->hard != VC_LIM_KEEP) {
377 switch (vcr->min != VC_LIM_KEEP) {
379 if (vcr->hard < vcr->min)
382 lim->rlim_max = vcr->hard;
390 set_one_ulimit(int resource, const struct vc_rlimit *limit)
393 getrlimit(resource, &lim);
394 adjust_lim(limit, &lim);
395 setrlimit(resource, &lim);
399 set_personality(unsigned long int personality_arg)
401 if (personality_arg == 0)
403 if (personality(personality_arg) < 0) {
410 pl_set_ulimits(const struct sliver_resources *slr)
415 set_one_ulimit(RLIMIT_RSS, &slr->vs_rss);
416 set_one_ulimit(RLIMIT_AS, &slr->vs_as);
417 set_one_ulimit(RLIMIT_NPROC, &slr->vs_nproc);
418 set_one_ulimit(RLIMIT_NOFILE, &slr->vs_openfd);
419 return set_personality(slr->personality);