1 // SPDX-License-Identifier: GPL-2.0-only
33 const char *perf_ns__name(unsigned int id)  in perf_ns__name()  argument
35 	if (id >= ARRAY_SIZE(perf_ns__names))  in perf_ns__name()
37 	return perf_ns__names[id];  in perf_ns__name()
43 	u64 link_info_size = ((event ? event->nr_namespaces : NR_NAMESPACES) *  in namespaces__new()
50 	namespaces->end_time = -1;  in namespaces__new()
53 		memcpy(namespaces->link_info, event->link_info, link_info_size);  in namespaces__new()
72 		return -1;  in nsinfo__get_nspid()
74 	while (getline(&statln, &linesz, f) != -1) {  in nsinfo__get_nspid()
88 			*in_pidns = (statln + sizeof("NStgid:") - 1) != nspid;  in nsinfo__get_nspid()
105 	int rv = -1;  in nsinfo__init()
107 	if (snprintf(oldns, PATH_MAX, "/proc/self/ns/mnt") >= PATH_MAX)  in nsinfo__init()
110 	if (asprintf(&newns, "/proc/%d/ns/mnt", nsinfo__pid(nsi)) == -1)  in nsinfo__init()
123 		RC_CHK_ACCESS(nsi)->need_setns = true;  in nsinfo__init()
124 		RC_CHK_ACCESS(nsi)->mntns_path = newns;  in nsinfo__init()
131 	if (snprintf(spath, PATH_MAX, "/proc/%d/status", nsinfo__pid(nsi)) >= PATH_MAX)  in nsinfo__init()
134 	rv = nsinfo__get_nspid(&RC_CHK_ACCESS(nsi)->tgid, &RC_CHK_ACCESS(nsi)->nstgid,  in nsinfo__init()
135 			       &RC_CHK_ACCESS(nsi)->in_pidns, spath);  in nsinfo__init()
149 		refcount_set(&nsi->refcnt, 1);  in nsinfo__alloc()
165 	RC_CHK_ACCESS(nsi)->pid = pid;  in nsinfo__new()
166 	RC_CHK_ACCESS(nsi)->tgid = pid;  in nsinfo__new()
167 	RC_CHK_ACCESS(nsi)->nstgid = pid;  in nsinfo__new()
169 	RC_CHK_ACCESS(nsi)->in_pidns = false;  in nsinfo__new()
171 	 * proc information. In that case, save the pid but don't try to enter  in nsinfo__new()
174 	if (nsinfo__init(nsi) == -1)  in nsinfo__new()
182 	return RC_CHK_ACCESS(nsi)->mntns_path;  in nsinfo__mntns_path()
196 	RC_CHK_ACCESS(nnsi)->pid = nsinfo__pid(nsi);  in nsinfo__copy()
197 	RC_CHK_ACCESS(nnsi)->tgid = nsinfo__tgid(nsi);  in nsinfo__copy()
198 	RC_CHK_ACCESS(nnsi)->nstgid = nsinfo__nstgid(nsi);  in nsinfo__copy()
199 	RC_CHK_ACCESS(nnsi)->need_setns = nsinfo__need_setns(nsi);  in nsinfo__copy()
200 	RC_CHK_ACCESS(nnsi)->in_pidns = nsinfo__in_pidns(nsi);  in nsinfo__copy()
202 		RC_CHK_ACCESS(nnsi)->mntns_path = strdup(nsinfo__mntns_path(nsi));  in nsinfo__copy()
203 		if (!RC_CHK_ACCESS(nnsi)->mntns_path) {  in nsinfo__copy()
214 	return &RC_CHK_ACCESS(nsi)->refcnt;  in nsinfo__refcnt()
221 		zfree(&RC_CHK_ACCESS(nsi)->mntns_path);  in nsinfo__delete()
246 	return RC_CHK_ACCESS(nsi)->need_setns;  in nsinfo__need_setns()
251 	RC_CHK_ACCESS(nsi)->need_setns = false;  in nsinfo__clear_need_setns()
256 	return RC_CHK_ACCESS(nsi)->tgid;  in nsinfo__tgid()
261 	return RC_CHK_ACCESS(nsi)->nstgid;  in nsinfo__nstgid()
266 	return RC_CHK_ACCESS(nsi)->pid;  in nsinfo__pid()
271 	return RC_CHK_ACCESS(nsi)->in_pidns;  in nsinfo__in_pidns()
278 	int oldns = -1;  in nsinfo__mountns_enter()
279 	int newns = -1;  in nsinfo__mountns_enter()
285 	nc->oldns = -1;  in nsinfo__mountns_enter()
286 	nc->newns = -1;  in nsinfo__mountns_enter()
291 	if (snprintf(curpath, PATH_MAX, "/proc/self/ns/mnt") >= PATH_MAX)  in nsinfo__mountns_enter()
309 	nc->oldcwd = oldcwd;  in nsinfo__mountns_enter()
310 	nc->oldns = oldns;  in nsinfo__mountns_enter()
311 	nc->newns = newns;  in nsinfo__mountns_enter()
316 	if (oldns > -1)  in nsinfo__mountns_enter()
318 	if (newns > -1)  in nsinfo__mountns_enter()
324 	if (nc == NULL || nc->oldns == -1 || nc->newns == -1 || !nc->oldcwd)  in nsinfo__mountns_exit()
327 	setns(nc->oldns, CLONE_NEWNS);  in nsinfo__mountns_exit()
329 	if (nc->oldcwd) {  in nsinfo__mountns_exit()
330 		WARN_ON_ONCE(chdir(nc->oldcwd));  in nsinfo__mountns_exit()
331 		zfree(&nc->oldcwd);  in nsinfo__mountns_exit()
334 	if (nc->oldns > -1) {  in nsinfo__mountns_exit()
335 		close(nc->oldns);  in nsinfo__mountns_exit()
336 		nc->oldns = -1;  in nsinfo__mountns_exit()
339 	if (nc->newns > -1) {  in nsinfo__mountns_exit()
340 		close(nc->newns);  in nsinfo__mountns_exit()
341 		nc->newns = -1;  in nsinfo__mountns_exit()
374 	nsinfo__get_nspid(&tgid, &nstgid, &in_pidns, "/proc/self/status");  in nsinfo__is_in_root_namespace()